Existence detection device and method for defining its detection range

Abstract

This invention discloses an existence detection device and a method for defining its detection range. The existence detection device includes an infrared detection module, a microwave detection module, and at least one blind zone defining medium. The infrared detection module detects the presence of a human body in a target detection area based on a Fresnel lens. The microwave detection module detects the presence of a human body using microwaves based on the Doppler effect. The detection area formed by the infrared detection module in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module. The blind zone defining medium is disposed at the detection field of view of the infrared detection module to define the detection blind zone of the infrared detection module in the target detection area, thereby defining the infrared detection area.

Description

Technical Field

[0001] This invention relates to the field of presence detection, and in particular to presence detection devices and methods for defining their detection range. Background Technology

[0002] With the development of IoT technology, artificial intelligence, smart home, and smart security technologies have increasingly higher demands for the accuracy of environmental detection, especially the detection of the presence and behavior of human beings. Only by obtaining sufficiently accurate detection results can intelligent terminal devices provide accurate judgment criteria. Existing technologies for human detection and sensing mainly include: 1. Image acquisition and corresponding algorithms to identify human bodies and their behavioral states. However, this is unacceptable due to the risks of privacy violations and leaks, and also suffers from high costs due to algorithm complexity and high hardware performance requirements. 2. Using Fresnel lenses to partition corresponding detection areas and using pyroelectric infrared (PIR) sensors to detect cross-regional movements of the human body within the detection area. However, the precision of the Fresnel lens partitioning of the detection area is limited, making it unable to detect human activities corresponding to breathing or heartbeats, easily leading to misjudgments of human presence or absence. For example, judging a person's absence as if they are statically present in the detection area can cause malfunctions in electrical equipment controlled based on the detection result of human presence or absence. 3. Microwave detection technology based on the Doppler effect principle specifically involves transmitting a microwave beam and receiving the reflected echo formed by the microwave beam being reflected by a corresponding object. A Doppler intermediate frequency (IF) signal corresponding to the frequency difference between the microwave beam and the reflected echo is generated through frequency mixing and detection. This Doppler IF signal serves as feedback on the motion of the corresponding object. Microwave detection technology based on the Doppler effect principle, as a crucial link between humans and objects, and between objects themselves, possesses unique advantages in behavior and presence detection technologies. It can detect the behavioral characteristics of moving objects, such as human motion characteristics, movement characteristics, and micro-motion characteristics, and even human heartbeat and breathing characteristics, without infringing on human privacy, thus having broad application prospects.

[0003] However, in practical applications, the wall / glass penetration behavior of microwaves, due to their strong penetrating characteristics, is uncontrollable. This can easily lead to a mismatch between the actual detection space and the corresponding target detection space, resulting in adverse effects. Specifically, in the Doppler intermediate frequency signal obtained based on the Doppler effect principle, under the same distance constraint, the amplitude of the Doppler intermediate frequency signal is directly related to the amplitude of human movement. Since human movement has a large amplitude range, the amplitude of the corresponding Doppler intermediate frequency signal also has a large amplitude range. Therefore, the detection range of human movement cannot be accurately defined based on the corresponding threshold setting of the amplitude of the Doppler intermediate frequency signal. That is, in order to meet the effective coverage of the target detection area, the emitted microwave beam, based on the penetration and reflection characteristics of microwaves, may extend beyond the coverage area of ​​the target detection area. It is also impossible to eliminate the interference of human movement in non-target detection areas based on the corresponding threshold setting of the amplitude of the Doppler intermediate frequency signal, thereby affecting the accuracy of detecting whether a human is present in the target detection area. Furthermore, because microwaves can easily cause a mismatch between the actual detection space and the corresponding target detection space, existing technologies struggle to achieve zoned detection, let alone determine the human posture within the target detection area. However, in practical applications, there is an urgent need to determine human posture, especially in environments with elderly people, where there is an urgent need to detect falls in the elderly based on human posture determination.

[0004] Furthermore, to obtain sufficiently accurate detection results in commonly used large-angle detection areas, specifically based on the detection results of the presence or absence of human heartbeat and / or breathing, and to achieve accurate detection of the presence or absence of the human body, even when the human body is in a static behavioral state, such as sitting or lying down, it is still possible to obtain sufficiently accurate detection results. Existing microwave detection devices based on the Doppler effect principle have requirements on the duration of microwave emission at the second level or a duty cycle greater than 10%. Consequently, existing microwave detection devices mostly operate in a continuous microwave emission mode, or operate in a discontinuous microwave emission mode with a pulse working time at the second level or a duty cycle greater than 10%. The operating current of the microwave detection device is 10-50mA, which is not suitable for battery power supply. Therefore, existing microwave detection devices are designed to be powered by the power grid and are connected to the power grid through corresponding lines using wired networking. However, the wiring of the microwave detection device using a wired network is complex, resulting in high installation costs, such as the cost of the wiring and the cost of routing the wiring, especially the cost of concealed wiring, which in practice far exceeds the cost of the microwave detection device itself. On the other hand, the complex wiring makes maintenance and repair difficult, leading to a significant increase in maintenance and repair costs. In other words, the widespread adoption of the microwave detection device is mainly limited by the installation and maintenance costs of the microwave detection device.

[0005] In other words, in practical applications, the wall / glass penetration behavior of microwaves, based on their strong penetrating characteristics, is uncontrollable, which can easily lead to a mismatch between the actual detection space and the corresponding target detection space. The corresponding detection results are easily affected by interference outside the target detection space, failing to meet the needs of practical applications, especially the need to judge human posture. At the same time, in order to adapt to different human states and postures and to detect human movements, including micro-movements such as heartbeat and / or breathing, and to achieve accurate detection of the presence or absence of the human body in different states and postures, the existing microwave detection devices have requirements for the duration of microwave emission on the order of seconds or a duty cycle of more than 10%, and the power consumption of the microwave detection devices is also difficult to reduce. Summary of the Invention

[0006] One object of the present invention is to provide a presence detection device and a method for defining the detection range thereon, wherein the presence detection device includes an infrared detection module, wherein the infrared detection module divides a target detection area into zones based on a Fresnel lens in the detection direction of the presence detection device, and obtains the detection result of the presence or absence of a human body by feedback on the cross-zone movement of a human body in the target detection area in the detection direction of the presence detection device.

[0007] Another objective of this invention is to provide an existence detection device and a method for defining the detection range thereof, wherein the existence detection device includes a microwave detection module, wherein the microwave detection module uses a Doppler intermediate frequency signal to provide high-precision feedback on the activity presence characteristics corresponding to human movement based on the Doppler effect principle, and / or uses the fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time to provide feedback on the movement within a specific frequency range to obtain the detection result of whether a human body exists.

[0008] Another objective of this invention is to provide a presence detection device and a method for defining the detection range thereof, wherein the infrared detection module, based on the Fresnel lens, partitions the detection area, and the detection range of the human body can be precisely controlled to avoid interference from actions outside the detection area. In other words, the detection range of the infrared detection module can be precisely defined, thereby improving the stability of the presence detection device and ensuring the accuracy of the detection results.

[0009] Another objective of this invention is to provide a presence detection device and a method for defining its detection range, wherein the infrared detection module partitions the target detection area based on the Fresnel lens in the tangential direction of the detection direction of the presence detection device, and detects the presence of a human body by feedback on cross-regional movements of the human body within the target detection area in the tangential direction of the detection direction of the presence detection device. The detection angle of the infrared detection module in the detection direction of the presence detection device can be precisely defined, and the detection range of the infrared detection module for the presence of a human body can be precisely controlled to avoid interference from movements outside the detection area.

[0010] Another objective of this invention is to provide a presence detection device and a method for defining the detection range thereof, wherein the installation arrangement of the infrared detection module and the microwave detection module satisfies that the detection spaces of the infrared detection module and the microwave detection module have overlapping spaces, and the infrared detection module and the microwave detection module form an overlapping detection range within the target detection area. Since the detection range of the infrared detection module for the presence of a human body can be precisely controlled, the overlapping detection area can be adjusted based on the control of the detection range of the infrared detection module for the presence of a human body, thereby adjusting the detection range of the microwave detection module for the presence of a human body and ensuring the accuracy of the detection results of the presence detection device.

[0011] Another objective of this invention is to provide a presence detection device and a method for defining the detection range of the same, wherein the detection area formed by the infrared detection module in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module. Based on the control of the detection range of the infrared detection module for the presence of a human body, the infrared detection area is precisely defined, thereby defining the infrared detection blind zone. This, in turn, allows for the adjustment of the detection range of the microwave detection module for the presence of a human body, ensuring the accuracy of the detection results of the presence detection device.

[0012] Another objective of this invention is to provide an existence detection device and a method for defining the detection range thereof. The existence detection device includes at least one blind zone defining medium, wherein the blind zone defining medium is disposed at the partition boundary of the infrared detection module to define the detection blind zone of the infrared detection module in the target detection area, thereby defining the infrared detection area. Based on the combined judgment of the detection results obtained by the infrared detection module and the microwave detection module, the detection range of the microwave detection module is defined, ensuring the accuracy of the detection results of the existence detection device.

[0013] Another objective of this invention is to provide a presence detection device and a method for defining its detection range, wherein a blind zone defining medium is movably disposed in the partitioned field of view of the infrared detection module. The position of the blind zone defining medium within the partitioned field of view of the infrared detection module is adjusted based on the quantity of the blind zone defining medium and / or movably adjusted, thereby adjusting the detection blind zone of the infrared detection module in the target detection area. This achieves the adjustment and definition of the infrared detection area and the infrared detection blind zone, enabling precise adjustment of the detection range of the microwave detection module for the presence of a human body, thus ensuring the accuracy of the detection results of the presence detection device.

[0014] Another object of the present invention is to provide a presence detection device and a method for defining the detection range thereof, wherein the microwave detection module obtains the detection result of whether a human body is present or not by using the Doppler effect principle to provide high-precision feedback of the presence characteristics of human movement corresponding to the Doppler intermediate frequency signal, and / or by using the wave signal to provide feedback of the movement in the specific frequency range, so as to compensate for the low response of the infrared detection module to the presence characteristics of human movement in the infrared detection area in the detection direction of the presence detection device, and in particular, to compensate for the low response of the infrared detection module to the presence characteristics of human movement in the radial direction in the infrared detection area in the detection direction of the presence detection device.

[0015] Another objective of this invention is to provide a presence detection device and a method for defining its detection range. The microwave detection module, based on the Doppler effect principle, uses the Doppler mid-frequency signal to provide high-precision feedback on the activity characteristics corresponding to human movement, and / or uses the wave signal to provide feedback on movements within a specific frequency range to obtain the detection result of whether a human is present. The microwave detection module can accurately detect micro-movements, including static limb movements and / or breathing and / or heartbeats, within the infrared detection blind zone, thereby ensuring the accuracy of the detection results of the presence detection device.

[0016] Another objective of this invention is to provide a presence detection device and a method for defining its detection range. The device partitions the target detection area based on the Fresnel lens along the tangential direction of the detection direction of the presence detection device, and defines the infrared detection area based on the blind zone defining medium for the infrared detection module's detection blind zone within the target detection area. The infrared detection module obtains the detection result of the presence or absence of a human body by responding to its cross-regional movements along the tangential direction of the detection direction of the presence detection device within the infrared detection area. The microwave detection module provides high-precision feedback of the activity presence characteristics corresponding to human movement using the Doppler intermediate frequency signal based on the Doppler effect principle. Alternatively, the detection result of whether a human body exists can be obtained by the feedback of the wave signal on the action within the specific frequency range, in order to compensate for the low response of the infrared detection module to the radial direction of the activity presence characteristics of the presence detection device in the infrared detection area. This can further enable accurate detection of micro-movements, including static limb movements and / or breathing and / or heartbeats, within the infrared detection blind zone. In this way, the accurate detection of the presence of a human body can be achieved by combining the detection results of the infrared detection module and the microwave detection module, and the judgment of the position and behavior of the human body based on the presence of the human body. This ensures the accuracy of the detection results of the presence detection device while improving the intelligence level of the presence detection device.

[0017] Another objective of this invention is to provide a presence detection device and a method for defining the detection range of the same. In this method, when the infrared detection module obtains a detection result indicating the presence of a human body in the infrared detection area, the presence detection device uses the microwave detection module, based on the Doppler effect principle, to provide high-precision feedback on the activity characteristics corresponding to human movement using the Doppler intermediate frequency signal, and / or uses the wave signal to provide feedback on movement within a specific frequency range to obtain a detection result indicating the presence of a human body. In the state where the microwave detection module obtains a detection result indicating the presence of a human body, the device determines that the human body is present and located within the infrared detection area. This determination, based on a combination of the detection results from the infrared detection module and the microwave detection module, ensures the accuracy of the presence detection device's detection results.

[0018] Another objective of this invention is to provide an presence detection device and a method for defining the detection range of the same. In a state where the infrared detection module does not obtain a detection result indicating the presence of a human body, the presence detection device obtains a detection result indicating the presence or absence of a human body using the microwave detection module. In a state where the microwave detection module obtains a detection result indicating the presence of a human body, the device determines that the human body is located in the infrared detection blind zone. The detection range of the microwave detection module is defined based on a combination of the detection results from the infrared detection module and the microwave detection module.

[0019] Another objective of this invention is to provide a presence detection device and a method for defining the detection range thereon, wherein, by adjusting and defining the infrared detection area and the infrared detection blind zone, the presence detection device can adapt to different usage scenarios and usage requirements, and realize intelligent human presence detection in the corresponding detection area, thereby improving the intelligence level of the presence detection device.

[0020] Another object of the present invention is to provide a presence detection device and a method for defining the detection range thereof, wherein, in a specific application scenario, the infrared detection area and the infrared detection blind zone are adjusted and defined based on the adjustment of the quantity of the blind zone defining medium and / or the adjustment of the position of the blind zone defining medium at the partition boundary of the infrared detection module, so that the infrared detection area covers the area where a human body enters or leaves the corresponding detection area. Since the human body's entry or exit from the corresponding detection area inevitably constitutes a cross-area movement, the infrared detection module's detection result of the human body changes from presence to absence, and the microwave detection module obtains... The detection result of the presence of a human body determines that the human body is located in the infrared detection blind zone. Specifically, when the microwave detection module detects that the activity characteristics corresponding to the human body's movement are not present, the detection result of the microwave detection module within the infrared detection blind zone, including the human body's static limb movements and / or breathing and / or heartbeat micro-movements, indicates that the human body located in the infrared detection blind zone is in a static state. This achieves the accurate detection of the presence or absence of a human body, and the accurate detection of the human body's position and behavior when a human body is present. This ensures the accuracy of the detection results of the presence detection device while improving the intelligence level of the presence detection device.

[0021] Another objective of the present invention is to provide an presence detection device and a method for defining the detection range thereof, wherein the presence detection device, based on the state of whether a human body is present in the detection area and the state of the presence of a human body in the detection area, determines the position and behavior of the human body in the detection area, and controls the working state of at least one electrical device, so as to intelligently realize the control of the scene mode of the electrical device based on the state of whether a human body is present in the detection area and the state of the presence of a human body in the detection area.

[0022] Another objective of this invention is to provide an presence detection device and a method for defining the detection range thereof, wherein the presence detection device controls the working state of the electrical equipment based on the judgment result of whether a human body is present in the detection area, such as controlling a lamp to be in an illuminated state based on the judgment result of whether a human body is present in the detection area and controlling the lamp to be in an off state based on the judgment result of whether a human body is not present in the detection area, so as to realize intelligent control of the electrical equipment based on the judgment result of whether a human body is present in the detection area.

[0023] Another objective of this invention is to provide a presence detection device and a method for defining the detection range thereof, wherein the presence detection device further controls the working state of the electrical equipment based on the judgment of the position and behavioral state of a human body in the detection area, such as based on the detection result of the human body being present in the infrared detection area, or the judgment result of the human body being present in the infrared detection blind zone in an active state, or the judgment result of the human body being present in the infrared detection blind zone in a static state, or the judgment result of the human body entering the detection area in an active state, and controls the scene mode of the corresponding electrical equipment to adjust environmental parameters such as ambient light, humidity, and temperature, thereby realizing intelligent control of the electrical equipment.

[0024] Another objective of this invention is to provide an presence detection device and a method for defining the detection range thereof. In a state where the detection directions of the infrared detection module and the microwave detection module are laterally positioned, the presence detection device defines the infrared detection blind zone based on the blind zone defining medium, forming a laterally layered arrangement of the infrared detection area and the infrared detection blind zone within the target detection area. Based on the correspondence between the corresponding layer heights and the heights of the human body in different postures, and according to the combination of detection results obtained by the infrared detection module and the microwave detection module, the device identifies the posture of the human body within the target detection area based on the layered presence location of the human body within the target detection area.

[0025] Another objective of this invention is to provide a presence detection device and a method for defining its detection range. The presence detection device has a first detection mode and a second detection mode. In the first detection mode, the presence detection device uses an infrared detection module to partition the target detection area based on the Fresnel lens along the tangential direction of the detection direction of the presence detection device. Feedback on the cross-regional movements of a human body within the target detection area along the tangential direction of the detection direction of the presence detection device is used to obtain the detection result of whether a human body is present. In the second detection mode, the presence detection device uses a microwave detection module based on the Doppler effect principle to provide high-precision feedback on the activity presence characteristics corresponding to human movement using the Doppler intermediate frequency signal, and / or to provide feedback on movements within a specific frequency range using the wave signal, to obtain the detection result of whether a human body is present. Furthermore, it can detect micro-movements within the infrared detection blind zone, including static limb movements and / or breathing and / or heartbeat movements. Thus, accurate detection of the presence of a human body is achieved through the linkage of the first and second detection modes, reducing false triggering caused by the high-precision feedback of human activity presence characteristics in the second detection mode, and simultaneously reducing the average power consumption of the presence detection device.

[0026] Another object of the present invention is to provide a presence detection device and a method for defining the detection range of the same, wherein, in a specific application scenario, the infrared detection area and the infrared detection blind zone are adjusted and defined based on the adjustment of the number of blind zone defining media and / or the position of the blind zone defining media relative to the partitioned field of view of the infrared detection module, so that the infrared detection area covers the area where a human body enters or leaves the corresponding detection area. Since the human body's entry or exit from the corresponding detection area inevitably constitutes a cross-area movement, after the presence detection device changes from obtaining a detection result indicating the presence of a human body in the detection area based on the first detection mode to obtaining a detection result indicating the absence of a human body in the detection area within a continuous time period t1, the process proceeds to the next step. The presence detection device detects the presence of a human in the detection area if the human is in the infrared detection blind zone or has left the detection area. The presence detection device enters the second detection mode at least once after detecting the presence of a human in the detection area based on the first detection mode until the human is not present in the detection area for a continuous time period t1. Based on the second detection mode, the detection result of the presence of a human in the detection area corresponds to the human being in the infrared detection blind zone, and the detection result of the absence of a human in the detection area corresponds to the human being leaving the detection area. This reduces the average power consumption of the presence detection device, ensures the accuracy of the detection results of the presence detection device, and improves the intelligence level of the presence detection device.

[0027] Another object of the present invention is to provide an presence detection device and a method for defining the detection range thereon, wherein when the presence detection device detects a human body in the detection area based on a first detection mode, the human body is present / enters the infrared detection area in an active state, and subsequently, when the presence detection device detects no human body in the detection area for a continuous time period t1 based on the first detection mode, the human body corresponding to the detection result of the presence of a human body in the detection area based on the second detection mode is located in the infrared detection blind zone, and the human body corresponding to the detection result of the absence of a human body in the detection area is in a state of leaving the detection area. Specifically, when the microwave detection module detects that the activity characteristics corresponding to human movement are absent, the system allows the detection results obtained by the microwave detection module within the infrared detection blind zone, including the detection results of static limb movements and / or breathing and / or heartbeat-like micro-movements, to indicate that the human body located in the infrared detection blind zone is in a static state. This reduces the average power consumption of the presence detection device and ensures the accuracy of the detection results. Furthermore, the system intelligently controls the scene modes of the electrical equipment based on the detection results of whether a human body is present in the detection area, and the judgment of the position and behavioral state of the human body detected in the detection area.

[0028] Another objective of this invention is to provide an existence detection device and a method for defining the detection range thereof. The existence detection device operates in a first detection mode after being powered on. When the existence detection device detects the presence of a human body in the detection area based on the first detection mode, it triggers a timing event for duration t1. Within duration t1, a continuation condition for duration t1 is formed based on the detection result of the presence of a human body in the detection area, thus extending the timing of duration t1 (including, but not limited to, resetting the timing of duration t1 with the current time node as the starting point, and restarting the timing of duration t1 with a time node after duration t1 as the starting point). After the timing of duration t1 ends (corresponding to the continuation condition for duration t1 not being formed based on the detection result of the absence of a human body in the detection area within the extended duration t1), the device enters the second detection mode at least once. This reduces the average power consumption of the existence detection device and ensures the accuracy of the detection results.

[0029] Another objective of this invention is to provide an presence detection device and a method for defining the detection range thereof, wherein in a first detection mode, the presence detection device defines the infrared detection area by the infrared detection module partitioning the target detection area based on the Fresnel lens and defining the detection blind zone of the infrared detection module in the target detection area based on the blind zone defining medium, and obtains the detection result of whether a human body is present by feedback on the cross-area movement of a human body within the infrared detection area, and can achieve a low power consumption state of the presence detection device in the first detection mode.

[0030] Another object of the present invention is to provide a presence detection device and a method for defining the detection range thereof, wherein in the second detection mode, the microwave detection module is excited by an excitation signal to emit a microwave beam corresponding to the frequency of the excitation signal, and receives the reflected echo formed by the microwave beam being reflected by a corresponding object to generate a corresponding echo signal, and generates a Doppler intermediate frequency signal corresponding to the frequency or phase difference between the excitation signal and the echo signal by a mixing detection method based on the Doppler effect principle, wherein the amplitude of the Doppler intermediate frequency signal is directly related to the energy of the reflected echo formed by the moving object and the frequency or phase difference between the corresponding echo signal and the excitation signal, and the amplitude of the Doppler intermediate frequency signal is proportional to the moving reflective surface area and the moving speed of the corresponding object, and inversely proportional to the distance between the object and the presence detection device in the detection direction of the presence detection device, wherein by effectively and significantly reducing the moving reflective surface area of ​​the corresponding object, the influence of the changes in the moving reflective surface area and the moving speed of the corresponding object on the amplitude of the Doppler intermediate frequency signal is weakened, and the amplitude of the Doppler intermediate frequency signal is reduced. The amplitude and the inverse ratio of the distance between the object and the detection direction of the presence detection device are relatively increased. Therefore, the corresponding threshold setting for the amplitude of the Doppler intermediate frequency signal mainly corresponds to the definition of the detection distance for the active presence feature. Furthermore, the attenuation caused by the microwave's penetration and reflection characteristics is equivalent to a reduction in detection distance. That is, the active presence feature in the non-target detection area, diffused by the microwave's penetration and reflection characteristics, has a relatively low amplitude in the Doppler intermediate frequency signal. This allows the corresponding threshold setting for the amplitude of the Doppler intermediate frequency signal to be shielded. Therefore, when the Doppler intermediate frequency signal is used to detect the presence of a human body with high precision based on the active presence feature corresponding to human movement, the effective detection space of the presence detection device for the active presence feature based on the Doppler intermediate frequency signal can be precisely defined according to the corresponding threshold setting and matched with the corresponding target detection area. This eliminates environmental interference in the non-target detection area, such as interference from the active presence feature in the non-target detection area caused by the microwave's penetration and reflection characteristics spreading through walls and by reflection / diffuse diffusion.

[0031] Another objective of this invention is to provide an existence detection device and a method for defining the detection range thereof. By effectively and significantly reducing the area of ​​the motion-reflecting surface of the corresponding object, the amplitude span of the activity presence characteristics corresponding to human movement in the Doppler intermediate frequency signal is narrowed. This facilitates the elimination of environmental motion interference in the effective detection space based on the amplitude span of the corresponding activity presence characteristics in the Doppler intermediate frequency signal according to a corresponding threshold setting. In other words, it improves the correlation between the Doppler intermediate frequency signal and the activity presence characteristics within the target detection area, thereby accurately feeding back the activity presence characteristics corresponding to human movement within the target detection area and eliminating environmental motion interference in the target detection area.

[0032] Another objective of this invention is to provide an existence detection device and a method for defining its detection range. Specifically, by setting the duty cycle of the excitation signal—specifically, setting the excitation signal to be an intermittent signal with a pulse duration of less than 1 second and a duty cycle of less than 10%—the existence detection device intermittently emits microwave beams, effectively reducing the area of ​​the moving reflective surface of the corresponding object. This facilitates the elimination of environmental motion interference in the effective detection space based on a threshold setting for the Doppler intermediate frequency signal and the precise definition of the effective detection space for active existence features. In other words, it resists environmental interference outside the target detection area and environmental motion interference within the target detection area when the effective detection space for active existence features matches the corresponding target detection area, further ensuring the accuracy of the existence detection device's detection results.

[0033] One object of the present invention is to provide a presence detection device and a method for defining the detection range thereof, wherein, in the second detection mode, when the human body's movement characteristics within the specific frequency range are detected by feedback of the movement within the specific frequency range using the wave signal, specifically when the specific frequency range is less than 50Hz and micro-movements such as human breathing and / or heartbeat are detected, the specific frequency range is at an extremely low frequency of electromagnetic silence, and the high-magnification of the wave signal within the specific frequency range does not affect the accuracy of the wave signal within the specific frequency range. Correspondingly, the wave signals corresponding to the micro-movements such as human breathing and / or heartbeat are allowed to be identified through high-magnification amplification, thereby achieving independent and accurate detection of static presence characteristics corresponding to the micro-movements such as human heartbeat and / or breathing based on the selection of the specific frequency range, eliminating environmental interference in the effective detection space, and accurately detecting the presence or absence of the human body based on the manifestation of vital characteristics by human breathing and / or heartbeat.

[0034] Another object of the present invention is to provide a presence detection device and a method for defining the detection range of the same method. In the second detection mode, under the same distance constraint, the amplitude of the corresponding wave signal is directly related to the amplitude of human body movements. Since human heartbeat and / or breathing micro-movements have a narrow amplitude span, the amplitude of the corresponding wave signal also has a narrow amplitude span. Therefore, the corresponding threshold setting for the amplitude of the wave signal mainly corresponds to the definition of the detection distance of static presence features. Furthermore, the attenuation caused by the penetration and reflection behavior of microwaves based on their penetration and reflection characteristics is equivalent to a reduction in the detection distance. That is, the static presence features of the non-target detection area spread by the penetration and reflection characteristics of microwaves are defined by the wave signal. The moving signal has a relatively low fluctuation amplitude, which allows the corresponding threshold setting based on the amplitude of the moving signal to be shielded. Therefore, the effective detection space of the presence detection device for static presence features based on the extremely low frequency moving signal can be accurately defined according to the corresponding threshold setting and matched with the corresponding target detection area, thereby eliminating environmental interference from non-target detection areas, such as environmental interference from non-target detection areas caused by microwave penetration and reflection characteristics through walls and reflection / diffuse diffusion. That is, it improves the correlation between the moving signal and the static presence features in the target detection area and can accurately feed back the static presence features in the target detection area corresponding to human heartbeat and / or breathing micro-movements.

[0035] Another objective of this invention is to provide a presence detection device and a method for defining its detection range. In a first detection mode, the presence detection device uses an infrared detection module to partition the target detection area based on the Fresnel lens along the tangential direction of the detection direction of the presence detection device, and defines the infrared detection area based on the blind zone defining medium for the infrared detection module's detection blind zone within the target detection area. The device obtains the detection result of whether a human body is present or not by feedback from the cross-regional movement of a human body within the target detection area along the tangential direction of the detection direction of the presence detection device. In a second detection mode, the presence detection device uses a microwave detection module based on the Doppler effect principle to obtain high-precision detection of activity presence characteristics corresponding to human movement using the Doppler intermediate frequency signal. The presence detection device obtains the detection result of whether a human body exists by providing feedback on the fluctuation signal and / or the feedback of the movement within the specific frequency range. It can further detect micro-movements, including static limb movements and / or breathing and / or heartbeats, within the infrared detection blind zone. Simultaneously, based on the adjustment of the number of blind zone defining media and / or the activity adjustment of the position of the blind zone defining media at the partitioned field of view of the infrared detection module and the entry rules of the second detection mode, the detection range of the presence detection device can be precisely controlled, the average power consumption of the presence detection device can be reduced, and accurate detection of the presence or absence of a human body can be achieved, as well as the location and behavior of a human body in the detection area. It allows for the simultaneous determination of the location and behavior state of a human body in the detection area based on the detection of the presence or absence of a human body according to the first detection mode and the second detection mode, according to the corresponding judgment rules.

[0036] Another objective of this invention is to provide an existence detection device and a method for defining its detection range. After a timeout of duration t1 (corresponding to the fact that the detection result based on the absence of activity in the detection area within the extended duration t1 does not form a condition for the continuation of duration t1), a timeout of duration t2 is performed, and the device enters the second detection mode at least once within duration t2, or exits the second detection mode within duration t2 based on the absence of a human body detection result in the detection area within the second detection mode. This cyclic logic reduces the average power consumption of the existence detection device and enables accurate detection of the presence or absence of a human body. Simultaneously, it allows for the determination of the human body's position and behavioral state within the detection area based on corresponding judgment rules according to both the first and second detection modes.

[0037] Another objective of the present invention is to provide an presence detection device and a method for defining the detection range thereof, wherein when the second detection mode is entered, the first detection mode is maintained, thereby ensuring the accuracy of the detection results of the presence detection device and further reducing the average power consumption of the presence detection device.

[0038] Another objective of this invention is to provide a presence detection device and a method for defining its detection range, wherein the timing of duration t2 is delayed, that is, after the timing of duration t1 ends, the timing of duration t2 is delayed, so as to avoid frequent triggering of the timing of duration t2 by the brief static state of the human body in the detection area, thereby avoiding frequent triggering of the second detection mode and further reducing the average power consumption of the presence detection device, and maintaining duration t1 at an appropriate length to ensure the accuracy of the feedback of the presence detection device on the human body's behavioral state based on the first detection mode.

[0039] Another objective of this invention is to provide an existence detection device and a method for defining its detection range, wherein the existence detection device includes a communication module, and the existence detection device controls the operating state of an electrical device through the communication module based on the judgment result of the presence or absence of a human body in the detection area, wherein the communication module controls the operating state of the electrical device wirelessly, so that the existence detection device is suitable for wirelessly networking with the corresponding electrical device or other existence detection devices, thereby simplifying the installation and maintenance of the existence detection device and realizing intelligent application scenarios of the existence detection device.

[0040] Another object of the present invention is to provide a presence detection device and a method for defining the detection range thereof, wherein the presence detection device operates in a first detection mode after being powered on, wherein when the presence detection device obtains a detection result of a human body being present in the detection area based on the first detection mode, it determines that the human body has entered / is present in the detection area in an active state, and subsequently, when the presence detection device obtains a detection result of no human body being present in the detection area for a continuous duration t1 based on the first detection mode, it triggers a timing for duration t2 and enters the second detection mode at least once within duration t2, wherein the presence detection device, based on the second detection mode, determines the detection range of the detection area. The presence detection result indicates that the human body is located in the infrared detection blind zone, and the detection result indicating that the human body entering the detection zone is in a state of leaving the detection zone. Specifically, when the microwave detection module detects that the activity presence characteristics corresponding to the human body's movement are not present, the detection result obtained by the microwave detection module of the human body within the infrared detection blind zone, including the human body's static limb movements and / or breathing and / or heartbeat micro-movements, indicates that the human body located in the infrared detection blind zone is in a static presence state. This helps to reduce the average operating current of the presence detection device, thereby making the presence detection device suitable for battery power supply.

[0041] Another objective of this invention is to provide a presence detection device and a method for defining the detection range thereof, wherein the presence detection device is adapted to be battery powered and can achieve wireless networking of the presence detection device through battery power, which helps to simplify the installation and maintenance of the presence detection device and reduce the installation and maintenance costs of the presence detection device, thereby promoting the widespread adoption of the presence detection device.

[0042] According to one aspect of the present invention, the present invention provides an presence detection device, wherein the presence detection device comprises:

[0043] An infrared detection module, which is based on a Fresnel lens to partition a target detection area, and obtains the detection result of whether a human body is present or not by feedback on the cross-regional movement of a human body within the target detection area;

[0044] A microwave detection module, which is allowed to be excited by an excitation signal to emit at least one microwave beam corresponding to the frequency of the excitation signal, and to receive a reflected echo formed by the microwave beam being reflected by a corresponding object to generate a corresponding echo signal to detect the target detection area. Based on the Doppler effect principle, a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the excitation signal and the echo signal provides feedback on the activity characteristics corresponding to human movement, and / or the fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time provides feedback on the corresponding frequency of movement to obtain the detection result of whether a human body is present or not. The detection area formed by the infrared detection module in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module.

[0045] At least one blind zone defining medium is provided, wherein the blind zone defining medium is disposed at the partitioned field of view of the infrared detection module to define the infrared detection blind zone of the infrared detection module in the target detection area. Then, based on the combined judgment of the detection results obtained by the infrared detection module and the microwave detection module, in the state where the infrared detection module does not obtain the detection result of the presence of a human body, the detection result of the microwave detection module is used to feed back the human body presence characteristics in the infrared detection blind zone. Thus, based on the definition of the infrared detection blind zone by the blind zone defining medium, the detection range of the microwave detection module is defined.

[0046] In one embodiment, the presence detection device identifies the location of a human body in the target detection area based on a combination of detection results obtained by the infrared detection module and the microwave detection module.

[0047] In one embodiment, the detection directions of the infrared detection module and the microwave detection module are laterally arranged. Based on the definition of the infrared detection blind zone by the blind zone defining medium, the infrared detection area and the infrared detection blind zone are laterally layered in the target detection area. Based on the correspondence between the corresponding layer height and the height of the human body in different postures, the posture of the human body is identified according to the layered position of the human body in the target detection area.

[0048] In one embodiment, the number of infrared detection modules is at least two, wherein the detection direction of each infrared detection module is laterally set to define the infrared blind zone of the corresponding infrared detection module based on at least one blind zone defining medium, forming a laterally layered arrangement of the infrared detection area and the infrared detection blind zone in the target detection area, so as to improve the accuracy of identifying the human posture based on the layered existence position of the human body in the target detection area based on the correspondence between the different layer heights of the target detection area and the height of the human body in different postures.

[0049] In one embodiment, when the infrared detection module obtains a detection result indicating the presence of a human body, the presence detection device further obtains a detection result indicating the presence or absence of a human body using the microwave detection module, and when the microwave detection module obtains a detection result indicating the presence of a human body, it determines that the human body is located in the infrared detection area.

[0050] In one embodiment, when the infrared detection module does not obtain a detection result of the presence of a human body, the presence detection device obtains a detection result of the presence or absence of a human body using the microwave detection module, and when the microwave detection module obtains a detection result of the presence of a human body, it determines that the human body is located in the infrared detection blind zone.

[0051] In one embodiment, when the microwave detection module does not obtain a detection result of the presence of activity features, the presence detection device obtains a detection result of static presence features, including static limb movements and / or breathing and / or heartbeat movements, through the microwave detection module, and when the microwave detection module obtains a detection result of static presence features, it determines that the human body is in the infrared detection blind zone in a static state.

[0052] In one embodiment, the blind zone defining medium is disposed between the infrared detection module and the Fresnel lens.

[0053] In one embodiment, the Fresnel lens is disposed between the infrared detection module and the blind zone defining medium.

[0054] In one embodiment, the microwave detection module's detection of the presence of a human body includes the following steps:

[0055] (a) Transmitting the microwave beam corresponding to the frequency of the excitation signal;

[0056] (b) Receive the reflected echo formed by the microwave beam being reflected by a corresponding object and generate the corresponding echo signal;

[0057] (c) Generating the Doppler intermediate frequency signal based on the frequency / phase difference between the excitation signal and the echo signal using a frequency-mixing detection method, and detecting the presence of a human body based on the corresponding amplitude of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum, or amplitude, corresponding to the activity characteristics of human movement; and / or,

[0058] (d) Based on the frequency change of the Doppler intermediate frequency signal over time, the Doppler intermediate frequency signal is converted into the wave signal, that is, the wave signal is the frequency change signal of the Doppler intermediate frequency signal over time;

[0059] (e) Selecting the wave signal within the specific frequency range of the wave signal by filtering, wherein the specific frequency range is within the frequency range of less than 120 Hz, i.e., the set of the specific frequency range is a subset of the set of frequency ranges of less than 120 Hz, to detect the presence of a human body by feedback of human movement within the specific frequency range based on the corresponding amplitude of the wave signal in the frequency spectrum, energy spectrum, power spectrum or amplitude of the specific frequency range.

[0060] In one embodiment, the specific frequency range is set to a frequency range of less than or equal to 50 Hz.

[0061] In one embodiment, the specific frequency range is set to a frequency range of less than or equal to 5 Hz.

[0062] In one embodiment, the specific frequency range is set to a frequency range of less than or equal to 1 Hz.

[0063] In one embodiment, the presence detection device includes a processor module, has a first detection mode and a second detection mode, and the infrared detection module and the microwave detection module are communicatively connected to the processor module. In the first detection mode, the presence detection device uses the infrared detection module to obtain the detection result of whether a human body is present or not. In the second detection mode, the presence detection device uses the microwave detection module to obtain the detection result of whether a human body is present or not. When the presence detection device is powered on, the infrared detection module is powered, corresponding to the presence detection device operating in the first detection mode. The microwave detection module is powered / energized under the control of the processor module. The processor module is configured to extend the timing of t1 based on the detection result of the infrared detection module detecting the presence of a human body in the infrared detection area, and to extend the timing of t1. After the timing of t1 ends, it counts t2. Within t2, it activates / wakes up the microwave detection module at least once based on the power supply / energization control of the microwave detection module to enter the second detection mode.

[0064] In one embodiment, the processor module is configured to trigger the start / wake-up control of the microwave detection module based on the end delay of a timeout of duration t1.

[0065] In one embodiment, the first detection mode is maintained in the second detection mode.

[0066] In one embodiment, the presence detection device is configured to be powered by dual batteries, such that, when the presence detection device is connected to batteries, one battery powers the infrared detection module and the other battery powers the microwave detection module.

[0067] In one embodiment, the processor module is configured to extend the duration of t2 by forming a condition for extending the duration of t2 based on the detection result of the presence of a human body detected by the second detection mode during the timing process of t2.

[0068] In one embodiment, the processor module is configured to reset the timing of t2 based on the detection result of the presence of a human body detected by the second detection mode during the timing process of t2, thereby forming a continuation of the timing of t2 and intermittently entering the second detection mode.

[0069] In one embodiment, the installation arrangement of the infrared detection module and the microwave detection module satisfies the requirement that the detection spaces of the infrared detection module and the microwave detection module have overlapping spaces.

[0070] In one embodiment, the blind zone defining medium is movably disposed within the partitioned field of view of the infrared detection module.

[0071] In one embodiment, the presence detection device includes a communication module, and the infrared detection module and the microwave detection module are communicatively connected to the communication module. The communication module sends a control signal based on the detection results obtained by the infrared detection module and the microwave detection module to control the operating state of at least one electrical device.

[0072] According to another aspect of the present invention, the present invention also provides a method for defining the detection range of a presence detection device, wherein the presence detection device includes an infrared detection module and a microwave detection module, and the method for defining the detection range of the presence detection device includes the following steps:

[0073] (A) At least one blind zone is movably set to define the partitioned field of view of the infrared detection module. The infrared detection module partitions a target detection area based on a Fresnel lens and obtains the detection result of whether a human body exists by responding to the cross-regional movement of a human body within the target detection area. The microwave detection module uses a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the excitation signal and the echo signal to provide feedback on the activity characteristics corresponding to the human body movement based on the Doppler effect principle, and / or uses the fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time to provide feedback on the corresponding frequency of the movement to obtain the detection result of whether a human body exists. The detection area formed by the infrared detection module in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module.

[0074] (B) By adjusting the position of the blind zone defining medium in the partitioned field of view of the infrared detection module, the position of the blind zone defining medium is changed to adjust the infrared detection blind zone of the infrared detection module in the target detection area, thereby realizing the adjustment and definition of the infrared detection area and the infrared blind zone.

[0075] In one embodiment, the detection directions of the infrared detection module and the microwave detection module are laterally arranged. Based on the definition of the infrared detection blind zone by the blind zone defining medium, the infrared detection area and the infrared detection blind zone are laterally layered in the target detection area. Based on the correspondence between the corresponding layer height and the height of the human body in different postures, and according to the combination of the detection results obtained by the infrared detection module and the microwave detection module, the layered position of the human body in the target detection area is identified, thereby identifying the posture of the human body in the target detection area. Attached Figure Description

[0076] Figure 1 This is a schematic block diagram of an presence detection device according to an embodiment of the present invention.

[0077] Figure 2A This is a schematic diagram illustrating an application of the presence detection device according to the above embodiments of the present invention.

[0078] Figure 2B for Figure 2A A magnified view of a portion of the application schematic shown.

[0079] Figure 3A This is a schematic diagram illustrating an application of the presence detection device according to the above embodiments of the present invention.

[0080] Figure 3B for Figure 3A A magnified view of a portion of the application schematic shown.

[0081] Figure 4A This is a schematic diagram illustrating an application of the presence detection device according to the above embodiments of the present invention.

[0082] Figure 4B for Figure 4A A magnified view of a portion of the application schematic shown.

[0083] Figure 5 This is a schematic diagram illustrating the logic of the presence detection device for judging the state of human behavior according to the above embodiments of the present invention.

[0084] Figure 6 This is a partial working logic diagram of the presence detection device according to the above embodiments of the present invention.

[0085] Figure 7 This is a schematic diagram illustrating the logic of the presence detection device for judging the state of human behavior according to a modified embodiment of the above-described embodiments of the present invention. Detailed Implementation

[0086] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0087] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0088] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0089] Referring to the accompanying drawings of this invention Figures 1 to 6As shown, an existence detection device according to an embodiment of the present invention is illustrated. The existence detection device includes an infrared detection module 20 and a microwave detection module 30. The infrared detection module 20, based on a Fresnel lens 21 dividing a target detection area along the detection direction of the existence detection device, obtains the detection result of the presence or absence of a human body by feeding back its cross-regional movements within the target detection area along the detection direction of the existence detection device. The microwave detection module 30, based on the Doppler effect principle, provides high-precision feedback of the activity presence characteristics corresponding to human movement using a Doppler intermediate frequency signal, and / or obtains the detection result of the presence or absence of a human body by feeding back the fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time, which corresponds to the movement within a specific frequency range. Specifically, the infrared detection module 20, based on the Fresnel lens 21 dividing the detection area, can precisely control the detection range of the human body to avoid interference from movements outside the detection area. In other words, the detection range of the infrared detection module 20 can be precisely defined, thereby improving the stability of the existence detection device and ensuring the accuracy of the detection results.

[0090] Specifically, the infrared detection module 20, based on the partitioning of the detection area by the Fresnel lens 21, can precisely control the detection range of a human body to avoid interference from actions outside the detection area. In other words, the detection range of the infrared detection module 20 can be precisely defined. More specifically, the infrared detection module 20, based on the partitioning of the target detection area by the Fresnel lens 21 in the tangential direction of the detection direction of the presence detection device, detects the presence of a human body by feedback of cross-regional actions of the human body within the target detection area in the tangential direction of the detection direction of the presence detection device. The detection angle of the infrared detection module 20 in the detection direction of the presence detection device can be precisely defined, and the detection range of the infrared detection module 20 for the presence of a human body can be precisely controlled to avoid interference from actions outside the detection area. That is to say, the detection angle of the infrared detection module 20 can be precisely defined, and the detection range of the infrared detection module 20 can be controlled by adjusting the detection angle of the infrared detection module 20.

[0091] It is worth mentioning that the installation and setting of the infrared detection module 20 and the microwave detection module 30 are such that the detection spaces of the infrared detection module 20 and the microwave detection module 30 have overlapping spaces. The infrared detection module 20 and the microwave detection module 30 form an overlapping detection range within the target detection area. Since the detection range of the infrared detection module 20 for the presence of a human body can be precisely controlled, the overlapping detection area can be adjusted based on the control of the detection range of the infrared detection module 20 for the presence of a human body, thereby adjusting the detection range of the microwave detection module 30 for the presence of a human body.

[0092] In other words, the detection range of the infrared detection module 20 is adjusted to achieve precise adjustment of the detection range of the microwave detection module 30, so that the detection range of the microwave detection module 30 can be precisely defined, thereby avoiding interference from non-target detection areas caused by the penetration and reflection characteristics of microwaves through walls and reflection / diffuse diffusion, and ensuring the accuracy of the detection results of the presence detection device.

[0093] Specifically, the infrared detection area formed by the infrared detection module 20 within the target detection area is defined as the infrared detection area of ​​the infrared detection module 20, and the target detection area outside the infrared detection area is defined as the infrared detection blind zone of the infrared detection module 20. By controlling the detection range of the infrared detection module 20 for the presence of a human body, the infrared detection area is precisely defined, thereby defining the infrared detection blind zone. This, in turn, allows for the adjustment of the detection range of the microwave detection module 30 for the presence of a human body, ensuring the accuracy of the detection results from the presence detection device.

[0094] Therefore, the presence detection device includes at least one blind zone defining medium 22, which is disposed at the partitioned viewpoint of the infrared detection module 20, that is, the partitioned viewpoint corresponding to the partitioned viewing angle formed by the Fresnel lens 21 on the target detection area, so as to define the infrared detection blind zone of the infrared detection module 20 in the target detection area, thereby defining the infrared detection area. Then, based on the combined judgment of the detection results obtained by the infrared detection module 20 and the microwave detection module 30, the detection range of the microwave detection module 30 is defined, thereby ensuring the accuracy of the detection results of the presence detection device.

[0095] Specifically, based on the blind zone defining medium 22, the infrared detection module 20 defines the detection blind zone of the infrared detection module 20 in the target detection area. The detection blind zone of the infrared detection module 20 in the target detection area is the infrared detection blind zone. Then, based on the combined judgment of the detection results obtained by the infrared detection module 20 and the microwave detection module 30, the detection range of the microwave detection module 30 is allowed to be defined in the infrared detection blind zone of the infrared detection module 20 in the target detection area. Thus, due to the precise definition of the infrared detection blind zone of the infrared detection module 20 in the target detection area by the blind zone defining medium 22, the detection range of the microwave detection module 20 is precisely defined, thereby ensuring the accuracy of the detection results of the presence detection device.

[0096] Furthermore, the microwave detection module 30, based on the Doppler effect principle, uses the Doppler intermediate frequency signal to provide high-precision feedback on the activity presence characteristics corresponding to human movement, and / or uses the wave signal to provide feedback on the movement within the specific frequency range to obtain the detection result of whether a human body is present or not. This can compensate for the low response of the infrared detection module 20 in the infrared detection area to the activity presence characteristics in the detection direction of the presence detection device, especially compensating for the low response of the infrared detection module 20 in the infrared detection area to the radial direction of the activity presence characteristics in the detection direction of the presence detection device, so as to ensure the accuracy of the detection result of the presence detection device.

[0097] In other words, the detection result of the microwave detection module 30 can be used as a confirmation of the detection result of the infrared detection module 20, thus ensuring the accuracy of the detection result of the presence detection device. Specifically, when the infrared detection module 20 obtains a detection result indicating the presence of a human body in the infrared detection area, the presence detection device uses the microwave detection module 30, based on the Doppler effect principle, to provide high-precision feedback on the activity characteristics corresponding to human movement using the Doppler intermediate frequency signal, and / or uses the wave signal to provide feedback on the movement within the specific frequency range to obtain a detection result indicating the presence or absence of a human body. Based on the state where the microwave detection module 30 obtains a detection result indicating the presence of a human body, the device determines that the human body is present and located in the infrared detection area. This combined judgment based on the detection results of the infrared detection module 20 and the microwave detection module 30 ensures the accuracy of the detection result of the presence detection device.

[0098] Specifically, the microwave detection module 30 uses the Doppler effect principle to provide high-precision feedback on the activity characteristics corresponding to human movement using the Doppler intermediate frequency signal, and / or uses the wave signal to provide feedback on the movement within the specific frequency range to obtain the detection result of whether a human body is present or not. The microwave detection module 30 can also accurately detect micro-movements, including static limb movements and / or breathing and / or heartbeat movements, within the infrared detection blind zone, thereby ensuring the accuracy of the detection results of the presence detection device.

[0099] Specifically, since the infrared detection module 20 detects the presence of a human body by partitioning the target detection area based on the Fresnel lens 21 in the tangential direction of the detection direction of the presence detection device, and by responding to the cross-regional movements of the human body within the target detection area in the tangential direction of the detection direction of the presence detection device, the infrared detection module 20 is limited by the partitioning accuracy of the Fresnel lens 21. It is difficult for the infrared detection module 20 to respond to micro-movements, including static limb movements and / or breathing and / or heartbeats, and therefore cannot detect the static presence characteristics of the human body. Therefore, the microwave detection module 30, based on the Doppler effect principle, uses the Doppler mid-frequency signal to provide high-precision feedback on the activity characteristics corresponding to human movement, and / or uses the wave signal to provide feedback on movements within a specific frequency range to obtain the detection result of whether a human body is present. The microwave detection module 30 accurately detects micro-movements, including static limb movements and / or breathing and / or heartbeats, within the infrared detection blind zone. This enables accurate detection of the static presence characteristics of the human body. In specific scenarios, such as when the presence detection device is applied to indoor environments like bedrooms, living rooms, and offices, the detection range of static presence characteristics corresponds to areas where the human body is likely to be in a static state, such as beds, sofas, and desks. Therefore, based on the blind zone defining medium 22, the infrared detection module 20 defines the detection blind zone of the target detection area. The infrared detection blind zone can be precisely defined in areas where the human body is likely to be in a static state. By combining the detection results of the infrared detection module 20 and the microwave detection module 30, accurate detection of the human body's position and state within the target detection area can be achieved.

[0100] Specifically, refer to Figure 6 The microwave detection module 30, based on the Doppler effect principle, detects the activity characteristics corresponding to human movement and / or the static characteristics corresponding to human heartbeat and breathing micro-movements using microwaves, including the following steps:

[0101] (a) Transmitting at least one microwave beam corresponding to an excitation signal frequency;

[0102] (b) Receive a reflected echo formed by the microwave beam being reflected by a corresponding object and generate a corresponding echo signal.

[0103] (c) Generating a Doppler intermediate frequency signal based on the frequency / phase difference between the excitation signal and the echo signal using a frequency-mixing detection method, and detecting the presence of a human body based on the corresponding amplitude of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum, or amplitude, corresponding to the activity characteristics of human movement; and / or,

[0104] (d) Based on the frequency change of the Doppler intermediate frequency signal over time, the Doppler intermediate frequency signal is converted into the wave signal, that is, the wave signal is the frequency change signal of the Doppler intermediate frequency signal over time; and

[0105] (e) Selecting the wave signal within the specific frequency range of the wave signal by filtering, wherein the specific frequency range is within the frequency range of less than 120 Hz, i.e., the set of the specific frequency range is a subset of the set of frequency ranges of less than 120 Hz, to detect the presence of the human body by feedback of the corresponding amplitude of the wave signal in the frequency spectrum, energy spectrum, power spectrum or amplitude of the specific frequency range to the static presence characteristics corresponding to the micro-movements of human heartbeat and breathing.

[0106] It is worth mentioning that when selecting the wave signal within the specific frequency range of the wave signal using analog filtering, the corresponding analog filtering circuit is configured as an analog filter comprising capacitors, resistors, inductors, and integrated filtering circuits. The type of analog filter is not limited; the analog filter can be selected from one or more combinations of LC and RC filters, such as low-pass filters, high-pass filters, band-pass filters, band-stop filters, dielectric filters, active filters, passive filters, or other analog filters known to those skilled in the art. When selecting the wave signal within the specific frequency range of the wave signal using digital filtering, the corresponding digital filtering circuit is configured as a digital low-pass filter comprising an ADC conversion module, a central processing unit (CPU), and a DAC conversion module. The ADC conversion module, the CPU, and the DAC conversion module are communicatively connected to each other, and the CPU provides the hardware environment for running the digital filter algorithm; alternatively, the ADC conversion module and the DAC conversion module are integrated into the CPU. Those skilled in the art should understand that the specific hardware configuration and algorithm of the digital filter are not limited. For example, but not limited to, the digital filter may be configured to support the operation of the corresponding algorithm software, such as MCU, DSP, FPGA, external high-precision ADC integrated chip, digital logic unit chip composed of operational amplifier, or one or more of the chips known to those skilled in the art. The corresponding algorithms include, but are not limited to, Butterworth filter algorithm, Fourier (FFT / DFT) algorithm, Kalman filter algorithm, finite impulse response filter, non-recursive filter (FIR) algorithm, Hilbert-Huang transform (HHT), linear system transform, wavelet transform, infinite impulse response filter, recursive filter (IIR) algorithm, or one or more of the algorithms known to those skilled in the art.

[0107] It is understood that in step (c), the frequency of the Doppler intermediate frequency signal corresponds to the velocity of the corresponding object. Similarly, in step (d), after converting the Doppler intermediate frequency signal into a wave signal based on the change in frequency over time, the amplitude fluctuation of the wave signal corresponds to the velocity fluctuation of the corresponding object over time. When the corresponding object is a human body and the wave signal represents human movement, one amplitude fluctuation of the wave signal corresponds to an action where the relative velocity of the human body approaches zero, such as a chest expansion caused by inhalation. That is, the frequency of the wave signal corresponds to the frequency of the corresponding action. Thus, in step (e), because... The specific frequency range is below 120Hz. The corresponding fluctuation signal in the specific frequency range is a low-frequency signal. Therefore, high-magnification of the fluctuation signal in the specific frequency range will not affect the accuracy of the fluctuation signal in the specific frequency range. This allows the fluctuations in the fluctuation signal that correspond to the static presence characteristics of the human body in the specific frequency range to be identified through high-magnification. Thus, based on the selection of the specific frequency range, independent and accurate detection of static presence characteristics corresponding to human heartbeat and / or breathing micro-movements is achieved, eliminating environmental interference in the effective detection space. Based on the manifestation of human breathing and / or heartbeat movements as vital signs, the presence or absence of the human body can be accurately detected.

[0108] Preferably, the specific frequency range is set to be within a frequency range of less than or equal to 50Hz, which is an electromagnetic silence frequency. The wave signal corresponding to the specific frequency range is an extremely low frequency signal. Therefore, the high-magnification of the wave signal in the specific frequency range will not affect the accuracy of the wave signal in the specific frequency range. This allows the wave corresponding to the static presence characteristics of the human body in the specific frequency range to be identified through high-magnification. Thus, based on the selection of the specific frequency range, independent and accurate detection of static presence characteristics corresponding to human heartbeat and / or breathing micro-movements is achieved, eliminating environmental interference in the effective detection space. Based on the manifestation of vital signs by human breathing and / or heartbeat, the presence or absence of the human body can be accurately detected.

[0109] It is worth mentioning that the amplitude of the Doppler intermediate frequency signal is directly related to the energy of the reflected echo formed by the moving object and the frequency or phase difference between the echo signal and the excitation signal. The amplitude of the Doppler intermediate frequency signal is proportional to the area and velocity of the moving reflective surface of the object, and inversely proportional to the distance between the object and the presence detection device in the detection direction. By effectively and significantly reducing the area of ​​the moving reflective surface of the object, the influence of changes in the area and velocity of the moving reflective surface on the amplitude of the Doppler intermediate frequency signal is weakened. The inverse ratio between the amplitude of the Doppler intermediate frequency signal and the distance between the object and the presence detection device in the detection direction is relatively increased. Therefore, the threshold setting for the amplitude of the Doppler intermediate frequency signal mainly corresponds to the definition of the detection distance for the active presence feature. Furthermore, the attenuation caused by the microwave's penetration and reflection behavior based on its penetration and reflection characteristics is equivalent to a reduction in detection distance. The activity presence characteristics of the non-target detection area formed by the penetration and reflection characteristics of the wave have a relatively low amplitude in the Doppler intermediate frequency signal, thus allowing the corresponding threshold setting based on the amplitude of the Doppler intermediate frequency signal to be shielded. Therefore, when the presence of a human body is detected in step (c) by feedback of the activity presence characteristics corresponding to human movement using the Doppler intermediate frequency signal, the effective detection space of the presence detection device based on the activity presence characteristics of the Doppler intermediate frequency signal can be precisely defined according to the corresponding amplitude threshold setting of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum, or amplitude, and matched with the corresponding target detection area. This eliminates environmental interference in the non-target detection area, such as interference from the activity presence characteristics of the non-target detection area formed by the penetration and reflection characteristics of microwaves through walls and reflection / diffuse diffusion. In this way, the presence of a human body is accurately detected with high-precision feedback of the activity presence characteristics corresponding to human movement based on the corresponding amplitude of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum, or amplitude.

[0110] Furthermore, by effectively and significantly reducing the surface area of ​​the moving reflective surface of the corresponding object, the amplitude range of the activity presence characteristics corresponding to human movement in the Doppler intermediate frequency signal is narrowed. This facilitates the elimination of environmental motion interference in the effective detection space based on the amplitude range of the corresponding activity presence characteristics in the Doppler intermediate frequency signal and the corresponding amplitude threshold in the frequency spectrum, energy spectrum, power spectrum, or amplitude of the Doppler intermediate frequency signal. In other words, it improves the correlation between the Doppler intermediate frequency signal and the activity presence characteristics in the target detection area, and can accurately reflect the activity presence characteristics corresponding to human movement in the target detection area while eliminating environmental motion interference in the target detection area.

[0111] Specifically, in this embodiment of the invention, by setting the duty cycle of the excitation signal, specifically setting the excitation signal to be an intermittent signal with a pulse working time of less than 1 second and a duty cycle of less than 10%, the microwave detection module 30 forms an intermittent emission of the microwave beam, resulting in an equivalent reduction in the area of ​​the moving reflective surface of the corresponding object. This facilitates the elimination of environmental motion interference in the effective detection space and the precise definition of the effective detection space for the active presence characteristics based on the corresponding amplitude threshold settings of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum, or amplitude. That is, in a state where the effective detection space for the active presence characteristics matches the corresponding target detection area, it resists environmental interference outside the target detection area and environmental motion interference in the target detection area, further ensuring the accuracy of the detection results of the presence detection device.

[0112] It is worth mentioning that, under the same distance constraint, the amplitude of the corresponding wave signal is directly related to the amplitude of human movement. Since human heartbeats and / or breathing movements have a narrow amplitude span, when the excitation signal is an intermittent signal with a pulse duration of less than 1 second and a duty cycle of less than 10%, the amplitude span of the wave signal corresponding to human heartbeats and / or breathing movements in terms of frequency spectrum, energy spectrum, power spectrum, or amplitude is further reduced. Therefore, the setting of the corresponding amplitude threshold for the wave signal in terms of frequency spectrum, energy spectrum, power spectrum, or amplitude mainly corresponds to the definition of the detection distance for static presence characteristics corresponding to micro-movements such as human heartbeats and / or breathing. Furthermore, the attenuation caused by the microwave's penetration and reflection behaviors based on its penetration and reflection characteristics is equivalent to the reduction in detection distance. The static presence characteristics of non-target detection areas, which are diffused by the penetration and reflection characteristics of microwaves, have a relatively low fluctuation amplitude in the wave signal. This allows the corresponding threshold setting based on the amplitude of the wave signal to be shielded. Therefore, the detection range of the microwave detection module 30 for static presence characteristics based on the extremely low frequency wave signal can be precisely defined according to the corresponding threshold setting, thereby eliminating the interference of static presence characteristics of non-target detection areas, such as the interference of static presence characteristics of non-target detection areas diffused through walls and by reflection / diffuse diffusion based on the penetration and reflection characteristics of microwaves. Combined with the combined judgment of the detection results of the microwave detection module 30 and the infrared detection module 20, the accuracy of the detection results of the presence detection device is further guaranteed.

[0113] It is understood that, in step (e), the narrower the specific frequency range, the fewer environmental actions with frequencies within that specific frequency range, and the lower the probability of interference from those environmental actions on the wave signal. Therefore, to further improve the correlation between the wave signal within the specific frequency range and human heartbeat and / or respiratory micro-movements, and to ensure the accuracy of the feedback of the wave signal within the specific frequency range on vital signs corresponding to human heartbeat and / or respiratory micro-movements, the specific frequency range is preferably set to an extremely low frequency range of less than 1 Hz. Since the frequency of human respiratory movements is generally less than or equal to 1 Hz, that is, less than one respiratory movement per second, the wave frequency in the wave signal corresponding to human respiratory movements is less than or equal to 1 Hz. Therefore, by setting... By narrowing the specific frequency range to an extremely low frequency range of less than or equal to 1 Hz, the probability of environmental interference with the wave signal is reduced due to fewer environmental actions with a frequency of less than or equal to 1 Hz. This increases the correlation between the wave signal in the specific frequency range and human respiratory micro-movements. Furthermore, since the amplitude of human respiratory movements is much higher than that of human heartbeats, the amplitude of the wave signal in the specific frequency range is ensured. Thus, while increasing the correlation between the wave signal in the specific frequency range and human respiratory micro-movements, the intensity of the wave signal is also ensured, thereby improving the accuracy of the feedback of the wave signal in the specific frequency range on vital signs corresponding to human respiratory micro-movements.

[0114] In other words, the infrared detection area is defined by partitioning the target detection area based on the Fresnel lens 21 in the tangential direction of the detection direction of the presence detection device, and by defining the detection blind zone of the infrared detection module 20 in the target detection area based on the blind zone defining medium 22. The infrared detection module 20 obtains the detection result of the presence or absence of a human body by feeding back the cross-regional movement of the human body in the target detection area in the tangential direction of the detection direction of the presence detection device within the infrared detection area. The microwave detection module 30 uses the Doppler effect principle to provide high-precision feedback of the activity presence characteristics corresponding to the human body's movement using the Doppler intermediate frequency signal, and / or uses the wave signal to provide high-precision feedback of the activity presence characteristics corresponding to the human body's movement. Feedback on movements within a specific frequency range is used to obtain the detection results of whether a human body is present, in order to compensate for the low response of the infrared detection module 30 to the radial direction of the activity characteristics of the presence detection device in the infrared detection area. It can further realize the accurate detection of micro-movements, including static limb movements and / or breathing and / or heartbeat, within the infrared detection blind zone. In this way, the combination of the detection results of the infrared detection module 20 and the microwave detection module 30 is used to accurately detect whether a human body is present, and to determine the position and behavior of the human body when it is present. This ensures the accuracy of the detection results of the presence detection device while improving the intelligence level of the presence detection device.

[0115] For details, please refer to the following: Figure 5In the state where the infrared detection module 20 obtains a detection result indicating the presence of a human body, the presence detection device further obtains a detection result indicating the presence or absence of a human body using the microwave detection module 30. When the microwave detection module 30 obtains a detection result indicating the presence of a human body, the device determines that the human body is located within the infrared detection area. Thus, the detection result of the microwave detection module 30 serves as confirmation of the detection result of the infrared detection module 20, thereby avoiding inaccuracies in the detection result of the infrared detection module 20 due to disturbances from heat sources or hot air currents, and ensuring the accuracy of the detection result of the presence detection device. Furthermore, in the state where the infrared detection module 20 does not obtain a detection result indicating the presence of a human body, the presence detection device obtains a detection result indicating the presence or absence of a human body using the microwave detection module 30. The presence detection device determines that the human body is located in the infrared detection blind zone when the detection result of the human body is obtained. Specifically, the microwave detection module 30 is allowed to acquire both active and static presence features. When the microwave detection module 30 does not acquire an active presence feature, the presence detection device acquires a static presence feature, including static limb movements and / or breathing and / or heartbeat movements, through the microwave detection module 30. When the microwave detection module 30 acquires a static presence feature, the human body is determined to be located in the infrared detection blind zone in a static state. It can also be understood that when the infrared detection module 20 does not acquire an active presence feature but the microwave detection module 30 acquires an active presence feature, the human body is determined to be located in the infrared detection blind zone in an active state.

[0116] It is worth mentioning that the blind zone defining medium 22 is movably disposed in the partitioned field of view of the infrared detection module 20. This allows for positional changes of the blind zone defining medium 22 within the partitioned field of view of the infrared detection module 20, thereby adjusting the infrared detection blind zone of the infrared detection module 20 in the target detection area. This achieves the adjustment and definition of the infrared detection area and the infrared detection blind zone. Because of this adjustment and definition, the presence detection device can adapt to different usage scenarios and needs, and achieve intelligent human presence detection in the corresponding detection area, thus improving the intelligence level of the presence detection device.

[0117] For details, please refer to the following: Figure 2A and Figure 2BAn application scenario of the presence detection device is illustrated. In this scenario, the presence detection device is used in a bedroom. It is understood that human activity in a bedroom can be broadly categorized into leisure activities or rest / sleep states. Furthermore, the rest / sleep state is likely located in a specific area, such as the bed in this application scenario. Therefore, based on the blind zone defining medium 22's definition of the infrared detection module 20's detection blind zone within the target detection area, a detection blind zone is defined for the infrared detection module 20 in this application scenario. The position of the blind zone defining medium 22 relative to the infrared detection module 20's field of view is adjusted based on the installation position of the presence detection device, thereby adjusting the infrared detection area and the infrared detection blind zone, thus defining the infrared detection blind zone around the bed. The system determines the location of the human body in the infrared detection area (i.e., the area outside the bed in the bedroom) by obtaining detection results from both the infrared detection module 20 and the microwave detection module 30. Conversely, if neither the infrared detection module 20 nor the microwave detection module 30 detects the human body, the system determines the location of the human body in the infrared detection blind zone (i.e., the area around the bed). Based on the microwave detection module 30, the system further determines the human body's state: if the microwave detection module 30 detects activity, the human body is in the infrared detection blind zone; if the microwave detection module 30 neither detects activity nor static activity, the human body is in the infrared detection blind zone.

[0118] In particular, Figure 2A In this example application scenario, the blind zone defining medium 22 is disposed between the infrared detection module 20 and the Fresnel lens 21. In some embodiments of the present invention, the Fresnel lens 21 is disposed between the infrared detection module 20 and the blind zone defining medium 22. The user can adjust the position of the blind zone defining medium 22 relative to the partition view of the infrared detection module 20, thereby easily adjusting the infrared detection area and the infrared detection blind zone. This allows the presence detection device to be applied to various usage scenarios and adapt to different installation heights. Furthermore, the user can flexibly and accurately adjust the infrared detection area and the infrared detection blind zone by adjusting the blind zone defining medium 22 based on different layouts of the presence detection device's usage scenario, such as the placement of furniture. This facilitates user use, reduces the installation and debugging costs of the presence detection device, and improves the practicality of the presence detection device.

[0119] It is worth mentioning that the presence detection device allows for the determination of the position and behavior of a human being in the detection area based on whether a human being is present in the detection area and the presence of a human being in the detection area. This allows for the control of the working state of at least one electrical device 100, thereby intelligently controlling the scenario mode of the electrical device 100 based on the determination of the position and behavior of a human being in the detection area.

[0120] Specifically, the presence detection device includes a communication module 40, which is communicatively connected to the microwave detection module 30 and the infrared detection module 20. The communication module 40 sends a control signal based on the detection results obtained by the infrared detection module 20 and the microwave detection module 30 to control the working state of the electrical equipment 100. It is worth mentioning that, in this embodiment of the present invention, the communication module 40 sends the control signal wirelessly, so that the presence detection device is suitable for wirelessly networking with the corresponding electrical equipment 100 or other presence detection devices, thereby simplifying the installation, maintenance and repair of the presence detection device, and realizing the intelligent application scenarios of the presence detection device.

[0121] For example, the electrical device 100 is implemented as a lamp, wherein the presence detection device controls the working state of the lamp based on the judgment result of whether a human body is present in the detection area, such as controlling the lamp to be in an illuminated state based on the judgment result of whether a human body is present in the detection area and controlling the lamp to be in an off state based on the judgment result of whether a human body is not present in the detection area, so as to realize intelligent control of the electrical device based on the judgment result of whether a human body is present in the detection area.

[0122] Furthermore, the presence detection device allows for further control of the electrical equipment's operating state based on the judgment of the human body's position and behavioral state in the detection area. For example, based on the detection result of the human body's presence in the infrared detection area, or the judgment result of the human body being active in the infrared detection blind zone, or the judgment result of the human body being static in the infrared detection blind zone, or the judgment result of the human body entering the detection area in an active state, the device can control the corresponding scene mode of the electrical equipment to adjust environmental parameters such as ambient light, humidity, and temperature, thereby achieving intelligent control of the electrical equipment.

[0123] It is worth mentioning that, based on the adjustment of the number of the blind zone defining medium 22, such as setting multiple blind zone defining mediums 22 at intervals in the partition boundary of the infrared detection module 20, multiple detection blind zones of the infrared detection module 20 are defined in the target detection area, thereby realizing the adjustment and definition of the infrared detection area and the infrared detection blind zone.

[0124] For details, please refer to the following: Figure 3A and Figure 3B Another application scenario of the presence detection device is illustrated. In this scenario, the human body's resting and sleeping state is most likely located on the bed and sofa. Therefore, in this example, based on setting two blind zone defining media 22 on the partitioned field of view of the infrared detection module 20, the infrared detection module 20 is defined with two detection blind zones in the application scenario, corresponding to the area around the bed and the area around the sofa respectively. Thus, when the infrared detection module 20 obtains the detection result of the human body's presence and the microwave detection module 30 obtains the detection result of the human body's presence, it is determined that the human body is in a leisure activity state in the infrared detection area, that is, the area in the bedroom that is not the bed and sofa. The detection is performed when the infrared detection module 20 does not obtain the detection result of the human body's presence and the microwave detection module 30 does not obtain the detection result of the human body's presence. The system determines that a human body is located in the infrared detection blind zone, i.e., the area where the bed or sofa is located, and judges the state of the human body based on the microwave detection module 30. If the microwave detection module 30 detects activity, the human body is judged to be in a leisure activity state in the infrared detection blind zone. If the microwave detection module 30 does not detect activity or static presence, the human body is judged to be in a resting or sleeping state in the infrared detection blind zone. At the same time, the presence detection device allows the system to control the scene mode of the electrical equipment 100 based on the judgment of the human body's position and behavior state in the detection area, such as lowering the brightness of the lights and the fan speed when it is judged that the human body is in a resting or sleeping state in the infrared detection blind zone.

[0125] In other words, by adjusting the number of the blind zone defining medium 22 and / or adjusting the position of the blind zone defining medium 22 at the partition boundary of the infrared detection module 20, the detection blind zone of the infrared detection module 20 in the target detection area is adjusted, thereby realizing the adjustment and definition of the infrared detection area and the infrared detection blind zone. This allows the detection range of the microwave detection module for the presence of a human body to be precisely adjusted, thus ensuring the accuracy of the detection results of the presence detection device. Furthermore, based on the adjustment and definition of the infrared detection area and the infrared detection blind zone, the position and behavioral state of the human body in the detection area can be judged to achieve intelligent control of the electrical equipment, thereby improving the intelligence level of the presence detection device.

[0126] Specifically, in a specific installation environment, where the detection directions of the infrared detection module 20 and the microwave detection module 30 are laterally positioned, the infrared detection area and the infrared detection blind zone are laterally layered relative to the target detection area based on the definition of the infrared detection blind zone by the blind zone defining medium 22. This allows for the identification of the human posture based on the corresponding layer height and the height of the human body in different postures, according to the layered position of the human body within the target detection area. For a specific example, please refer to the accompanying drawings of this invention. Figure 4A and Figure 4BAs shown, the detection directions of the infrared detection module 20 and the microwave detection module 30 are laterally positioned. The infrared detection blind zone is defined by the blind zone defining medium 22, thus achieving layering of the target detection area. Specifically, in this application scenario, the infrared detection blind zone and the infrared detection area are layered within the target detection area. The infrared detection blind zone is defined below the infrared detection area. The layering of the human body within the target detection area is identified based on the detection results obtained by the infrared detection module 20 and the microwave detection module 30, thereby reflecting the posture of the human body within the target detection area in this application scenario. Specifically, the infrared detection blind zone is defined within the height range of a lying down person, and the infrared detection area is defined within the height range of a standing and / or sitting person. When the infrared detection module 20 detects the presence of a human body, it identifies the human body as being in a standing or sitting posture within the target detection area. When the infrared detection module 20 does not detect the presence of a human body, the presence detection device uses the microwave detection module 30 to detect the presence of a human body. When the microwave detection module 30 detects the presence of a human body, it identifies the human body as being in a lying posture within the target detection area. This allows for the determination of the human body's posture. Furthermore, the presence detection device allows for the control of the scene mode of the corresponding electrical equipment based on the posture of the human body within the target detection area, adjusting environmental parameters such as ambient light, humidity, and temperature. This enables intelligent control of the electrical equipment and improves the intelligence level of the presence detection device.

[0127] It is worth mentioning that the number of infrared detection modules 20 is at least two, and the detection direction of each infrared detection module 20 is laterally set to define the infrared blind zone of the corresponding infrared detection module 20 based on at least one blind zone defining medium 22, forming a laterally layered arrangement of the infrared detection area and the infrared detection blind zone in the target detection area. This improves the accuracy of identifying the human posture based on the layered position of the human body in the target detection area, based on the correspondence between different layer heights of the target detection area and the height of the human body in different postures. Specifically... Figure 4A and Figure 4BIn this illustrated application scenario, two infrared detection modules 20 are configured. Based on the blind zone defining medium 22, a detection blind zone is defined for both infrared detection modules 20 within the target detection area, allowing for further layering of the infrared detection area. Specifically, one infrared detection module 20 is installed higher than the other. The infrared detection module 20 with the higher installation position is designated as the first infrared detection module, and the detection area formed by the first infrared detection module within the target detection area is called the first infrared detection area. The other infrared module 20 is designated as the second infrared detection module, and the detection area formed by the second infrared detection module within the target detection area is called the second infrared detection area. Based on the detection results obtained by the two infrared detection modules 20 and the microwave detection module 30, the layered location of the human body within the target detection area is identified, reflecting the posture of the human body within the target detection area. Specifically, in this application scenario, the infrared detection blind zone is defined at the height of the human body when lying down. The first infrared detection area is defined within the height range of a standing person, and the second infrared detection area is defined within the height range of a sitting person. Based on the detection results obtained by the two infrared detection modules 20 and the microwave detection module 30, the posture of the human body is identified. Specifically, if the first infrared detection module detects the presence of a human body, the human body is identified as standing in the target detection area; if the first infrared detection module does not detect the presence of a human body but the second infrared detection module does, the human body is identified as sitting in the target detection area; and if both infrared detection modules 20 and the microwave detection module 30 do not detect the presence of a human body, the human body is identified as lying down in the target detection area. This method improves the accuracy of identifying the human body's posture based on its layered position within the target detection area, by establishing a correspondence between the different layered heights of the target detection area and the height of the human body in different postures.

[0128] Furthermore, it is worth mentioning that the adjustment and definition of the infrared detection area and the infrared detection blind zone are achieved by adjusting the number of the blind zone defining medium 22 and / or adjusting the position of the blind zone defining medium 22 relative to the partitioned field of view of the infrared detection module 20. In application scenarios where the detection directions of the infrared detection module 20 and the microwave detection module 30 are set laterally, the target detection area is defined in layers based on the blind zone defining medium 22. The presence detection device is adaptable to different application scenarios. For example, in the application scenario of detecting elderly people falling, by defining the infrared detection area to partially cover the height range of the human body lying down, such as the height of a bed, and based on the corresponding settings, if the infrared detection module 20 does not obtain the detection result of the human body's presence momentarily but the microwave detection module 30 continuously obtains the detection result of the human body's presence, it is judged that the human body has fallen. Thus, the corresponding electrical equipment is controlled according to the posture of the human body, such as controlling the alarm, sending warning commands, etc., thereby enriching the application scenarios of the presence detection device and improving its practicality.

[0129] Furthermore, in specific usage scenarios, the infrared detection area and the infrared detection blind zone are adjusted and defined by adjusting the number of the blind zone defining medium 22 and / or by adjusting the position of the blind zone defining medium 22 relative to the partitioned field of view of the infrared detection module 20, so that the infrared detection area covers the area where a human body enters or leaves the corresponding detection area, such as in... Figure 2A or Figure 3A In the two application scenarios of the example, the infrared detection area covers the bedroom door. Since the human body's entry or exit from the corresponding detection area will inevitably form a cross-area movement, the presence detection device can link the infrared detection module 20 and the microwave detection module 30 based on the corresponding activation rules, thereby reducing power consumption while ensuring the accuracy of the detection results.

[0130] Specifically, refer to the accompanying drawings of this invention. Figure 7The presence detection device has a first detection mode and a second detection mode. In the first detection mode, the presence detection device uses the infrared detection module 20 to partition the target detection area based on the Fresnel lens in the tangential direction of the detection direction of the presence detection device, and obtains the detection result of whether a human body is present by feeding back the cross-regional movement of the human body in the tangential direction of the detection direction of the presence detection device within the target detection area. In the second detection mode, the presence detection device uses the microwave detection module to provide high-precision feedback of the activity presence characteristics corresponding to human body movement using the Doppler intermediate frequency signal based on the Doppler effect principle. And / or obtain the detection result of whether a human body is present by the feedback of the wave signal on the movement in the specific frequency range, so as to compensate for the low response of the infrared detection module to the radial direction of the activity presence characteristics of the presence detection device in the infrared detection area, and further detect micro-movements such as static limb movements and / or breathing and / or heartbeat in the infrared detection blind zone. In this way, the accurate detection of the presence of a human body is achieved by linking the first detection mode and the second detection mode, reducing the false triggering caused by the high-precision feedback of the human activity presence characteristics of the second detection mode, and reducing the average power consumption of the presence detection device.

[0131] Specifically, given that the entry or exit of a human body into the corresponding detection area inevitably constitutes a cross-area movement, after the presence detection device changes from detecting the presence of a human body in the detection area based on the first detection mode to detecting the absence of a human body in the detection area for a continuous duration t1, the human body entering the detection area is either in the infrared detection blind zone or has left the detection area. The presence detection device enters the second detection mode at least once after detecting the presence of a human body in the detection area based on the first detection mode to detecting the absence of a human body in the detection area for a continuous duration t1. Therefore, the detection result of the presence of a human body in the detection area based on the second detection mode corresponds to the state of the human body entering the detection area being in the infrared detection blind zone, and the detection result of the absence of a human body in the detection area corresponds to the state of the human body entering the detection area being in the state of leaving the detection area. This reduces the average power consumption of the presence detection device, ensures the accuracy of the detection results of the presence detection device, and improves the intelligence level of the presence detection device.

[0132] In other words, the presence detection device operates in the first detection mode after being powered on. When the presence detection device detects a human body in the detection area based on the first detection mode, the human body is active and present / enters the infrared detection area. Subsequently, when the presence detection device detects no human body in the detection area for a continuous time period t1 based on the first detection mode, the human body detected by the presence detection device based on the second detection mode is located in the infrared detection blind zone if the detection result indicates the presence of a human body in the detection area, and is in a state of leaving the infrared detection area if the detection result indicates the absence of a human body in the detection area. The system allows for the following state: when the microwave detection module detects no activity characteristics corresponding to human movement, the system determines that the human body in the infrared detection blind zone is in a static state based on the detection results obtained by the microwave detection module, including static limb movements and / or breathing and / or heartbeat-like micro-movements. This reduces the average power consumption of the presence detection device and ensures the accuracy of its detection results. Furthermore, the system intelligently controls the scene modes of the electrical equipment based on the detection results of whether a human body is present in the detection area, and the judgment of the position and behavioral state of the human body detected in the detection area.

[0133] Specifically, the presence detection device includes a processor module 10, wherein when the presence detection device obtains a detection result indicating the presence of a human body in the detection area based on the first detection mode, the processor module is triggered to start timing for duration t1; and within duration t1, based on the first detection mode and the detection result indicating the presence of a human body in the detection area, a condition for extending duration t1 is formed, triggering the processor module to extend the timing for duration t1 (including but not limited to resetting the timing for duration t1 with the current time node as the starting point, and restarting the timing for duration t1 with a time node after duration t1 as the starting point), and after the timing for duration t1 by the processor module 10 ends. (Corresponding to the fact that the detection result based on the absence of activity in the detection area within the extended t1 time period does not form a condition for the extension of t1 time period), the presence detection device enters the second detection mode under the control of the processor module 10. That is, the presence detection device will only enter the second detection mode when all the human body that entered the detection area leaves the infrared detection area. Therefore, for general indoor use scenarios, such as offices, conference rooms, bedrooms, etc., the situation in which the presence detection device enters the second detection mode is limited. This reduces the average power consumption of the presence detection device and ensures the accuracy of the detection results of the presence detection device.

[0134] Specifically, while ensuring the accuracy of the presence detection device in detecting the presence or absence of a human body, in order to further reduce the average power consumption of the presence detection device, after the timing of time t1 ends (corresponding to the fact that the detection result based on the absence of activity presence characteristics in the detection area during the extended time t1 does not form a condition for the extension of time t1), the processor module 10 is triggered to start timing for time t2. The second detection mode is triggered to enter at least once during time t2 under the control of the processor module 10, so as to reduce the average power consumption of the presence detection device and achieve accurate detection of the presence or absence of a human body based on this cyclic working logic. At the same time, it allows the behavior state of the human body in the infrared detection blind zone to be judged simultaneously based on the detection of human activity presence characteristics and static presence characteristics according to the corresponding judgment rules.

[0135] Furthermore, when the second detection mode is entered, the first detection mode is maintained, thereby ensuring the accuracy of the detection results of the presence detection device and further reducing the average power consumption of the presence detection device.

[0136] Specifically, in the state where the detection device is connected to a power source, the processor module 10 is powered and connected to a corresponding power source, such as a battery or mains power. The infrared detection module 20 is communicatively connected to the processor module 10 and powered and connected to the power source, such as being powered and connected to the power source in a state of direct electrical connection with the power source, or being powered and connected to the power source via the processor module 10. The microwave detection module 30 is communicatively connected to the processor module 10 and powered and connected to the power source under the control of the processor module 10. For example, the microwave detection module 30 and the power source are provided with a switch 11 that is controlled by the on / off state of the switch 11, such as, but not limited to, an electronically controlled switch, a relay, a transistor, a MOSFET, and a thyristor. The switch 11 is electrically connected to the processor module 10 and is controlled by the processor module 10 to be on / off. Optionally, the microwave detection module 30 is powered and connected to the power source via the processor module 10 so as to be powered and / or excited under the control of the processor module 10.

[0137] In other words, the presence detection device operates in the first detection mode after being powered on. When the processor module 10, based on a corresponding threshold setting, obtains a human presence detection result from the infrared detection module 20 in the detection area, the processor module 10 triggers a timer for duration t1 and determines that a human has entered (existed) the infrared detection area in an active state. Within duration t1, the processor module 10 extends the timer for duration t1 based on the detection result of the human presence in the detection area in the first detection mode, and determines that a human is active in the detection area. Subsequently, when the processor module 10 obtains a detection result from the infrared detection module 20 that no human is present in the detection area within consecutive durations t1, the processor module 10 triggers a timer for duration t2 and controls the microwave detection module 30 within duration t2. The processor module 10 is activated at least once. Based on a corresponding threshold setting, it determines that a human body exists in the infrared detection blind zone when the microwave detection module 30 detects the presence of a human body in the detection area, and determines that a human body entering the infrared detection area is in a state of leaving the infrared detection area when the detection result indicates that no human body exists in the detection area. Specifically, it allows the human body located in the infrared detection blind zone to be in a static state based on the detection result obtained by the microwave detection module 30 of micro-movements such as static limb movements and / or breathing and / or heartbeat within the infrared detection blind zone when the detection result indicates that no human body is detected. It is understood that when the microwave detection module 30 detects activity characteristics, the human body located in the infrared detection blind zone is in an active state.

[0138] It is worth mentioning that, in the second detection mode, when the processor module 10 determines that a human body exists in the infrared detection blind zone based on the detection result obtained by the microwave detection module 30 with the corresponding threshold setting, and subsequently, when the processor module 10 determines that a human body exists in the detection area with the detection result obtained by the infrared detection module 20 with the corresponding threshold setting, it determines that the human body has moved to the infrared detection area. Thus, under the above-mentioned cyclical working logic, based on the corresponding judgment rules, the presence or absence of a human body is detected according to the first detection mode and the second detection mode, and the position and behavior state of the human body in the detection area are determined simultaneously. For example, the behavior state of entering (existing) the infrared detection area in an active state, the behavior state of existing in the infrared detection blind zone in an active state, the behavior state of existing in the infrared detection blind zone in a static state, the behavior state of changing from a static state to an active state in the detection area, and the behavior state of leaving the detection area.

[0139] It is understood that the infrared detection module 20 detects the cross-regional movements of the human body within the detection area based on the partitioning of the detection area by the Fresnel lens 21. The higher the accuracy of the infrared detection module 20, the less the triggering frequency of the processor module 10 for the timing of t2 can be reduced, thereby helping to reduce the average power consumption of the presence detection device. However, although existing infrared sensors have low operating current, generally 30uA to 50uA, their detection accuracy cannot meet the requirements for detecting the presence of the human body in a static state, including the relatively static presence state in the tangential direction of the detection direction of the presence detection device. The present invention, by starting and stopping the second detection mode according to the above-mentioned cyclic working logic, can reduce the average power consumption of the presence detection device while ensuring the stability of the detection results of the presence detection device.

[0140] In other words, in the first detection mode, the presence detection device uses the infrared detection module 20 to partition the target detection area based on the Fresnel lens 21 in the tangential direction of the detection direction of the presence detection device, and the blind zone defining medium 22 to define the infrared detection area of ​​the infrared detection module 20 in the target detection area, thereby defining the infrared detection area. The device obtains the detection result of the presence or absence of a human body by feeding back its cross-regional movements in the tangential direction of the detection direction of the presence detection device within the infrared detection area. In the second detection mode, the presence detection device uses the microwave detection module 30 based on the Doppler effect principle to provide high-precision feedback of the activity presence characteristics corresponding to human movement using the Doppler mid-frequency signal, and / or using the wave... The motion signal feedback to the specific frequency range of the motion signal obtains the detection result of whether a human body is present or not, and can further detect micro-movements such as static limb movements and / or breathing and / or heartbeat movements within the infrared detection blind zone. At the same time, based on the adjustment of the number of blind zone defining media 22 and / or the activity adjustment of the position of the blind zone defining media 22 in the partition view of the infrared detection module 20 and the entry rules of the second detection mode, the detection range of the presence detection device can be precisely controlled, the average power consumption of the presence detection device can be reduced, and the accurate detection of whether a human body is present or not, as well as the position and behavior of the human body in the detection area, can be achieved. It allows the detection of the presence or absence of a human body based on the first detection mode and the second detection mode according to the corresponding judgment rules, and simultaneously judges the position and behavior status of the human body in the detection area.

[0141] Furthermore, the timing of duration t2 by the processor module 10 is preferably delayed. That is, after the timing of duration t1 by the processor module 10 ends, the timing of duration t2 is delayed. This delay in the timing of duration t2 avoids frequent triggering of the timing of duration t2 by the brief static state and frequent entry and exit of the human body within the infrared detection area. During the delay, when the processor module 10 triggers the timing of duration t1 after the infrared detection module 20 obtains the detection result indicating the presence of activity in the detection area based on the corresponding threshold setting, this avoids frequent triggering of the second detection mode, further reducing the average power consumption of the presence detection device, and maintaining duration t1 at an appropriate length to ensure timely feedback of the human body's behavior based on the first detection mode.

[0142] It is worth mentioning that the presence detection device only triggers the timing of time t2 after the processor module 10, based on the corresponding threshold setting, obtains the detection result of the infrared detection module 20 from the acquisition of the detection result of the presence of a human body in the detection area to the acquisition of the detection result of the human body not existing in the detection area within a continuous time period t1. That is, the second detection mode will only be triggered at time t2 when all the human bodies that entered the infrared detection area have left the infrared detection area. Therefore, lengthening the setting of time t1 is beneficial to avoid frequent triggering of the timing of time t2 and thus reduce the average power consumption of the presence detection device. However, an excessively long time t1 is not conducive to the timely feedback of the presence detection device on the human body activity status based on the first detection mode and thus cannot realize real-time control of the corresponding electrical equipment based on the human body behavior status. Therefore, in this modified embodiment of the present invention, time t1 is preferably set to be greater than or equal to 5 seconds, so as to ensure the timely feedback of the presence detection device on the human body behavior status based on the first detection mode and reduce the frequent activation of the second detection mode, thereby reducing the average power consumption of the presence detection device.

[0143] Furthermore, the t2 duration is preferably set to be less than or equal to 1 minute, so as to reduce the average power consumption of the presence detection device while ensuring the accuracy of the detection result of the presence detection device in the second detection mode regarding the presence or absence of a human body in the detection area. Taking the presence detection device having an operating current of 100uA in the first detection mode and an operating current of 25mA in the second detection mode as an example, when the t2 duration is set to 10 seconds, even if the activation trigger of the second detection mode is triggered 60 times every 24 hours, the presence detection device has an average operating current of 273uA. Further, taking a 3000mAh battery as an example, when the presence detection device is powered by this battery, the presence detection device can theoretically work for 457 days, thus it does not need to be frequently charged or replaced and is adapted to battery power.

[0144] It is worth mentioning that, when the presence detection device is connected to a battery, the presence detection device is preferably configured to be powered by dual batteries. Specifically, one battery powers the infrared detection module 20 and the other battery powers the microwave detection module 30. This simplifies the circuit design of the presence detection device based on the dual battery power supply configuration, given the dual requirements of the presence detection device for both DC power supply and pulse power supply.

[0145] In other words, since the infrared detection module 20 requires a stable voltage environment for power supply, and the microwave detection module 30 operates in narrow pulse mode, its transient operating current varies greatly. Sudden changes in the transient operating current of the microwave detection module 30 can affect the stability of the power supply network for the infrared detection module 20. Furthermore, when the presence detection device is powered by a single battery, the transient operating current of the microwave detection module 30 operating in pulse mode varies significantly. This rapid change in the transient operating current of the single battery causes a drop in the voltage supplied by the single battery, potentially falling below the voltage required for the infrared detection module 20. This leads to instability in the infrared detection module 20, resulting in low detection accuracy and inaccurate detection. Therefore, the presence detection device is preferably configured to use a dual-battery power supply, such as using one battery to independently power the microwave detection module 30, or using one battery as a pulse power supply to independently power the radio frequency section of the microwave detection module 30. This reduces the impact of the microwave output circuit operating in pulse mode on other circuits, thereby helping to ensure the stability of the power supply network for the infrared detection module 20.

[0146] Specifically, as described above, the presence detection device defines the infrared detection area by the infrared detection module 20 partitioning the target detection area based on the Fresnel lens 21 in the tangential direction of the detection direction of the presence detection device, and by defining the detection blind zone of the infrared detection module 20 in the target detection area based on the blind zone defining medium 22. The presence or absence of a human body is detected by feedback from the infrared detection area on the cross-regional movement of the human body in the tangential direction of the detection direction of the presence detection device within the target detection area. The presence or absence of a human body is also detected by the microwave detection module 30 using the Doppler effect principle to provide high-precision feedback on the activity characteristics corresponding to human movement using the Doppler mid-frequency signal, and / or by the feedback of the wave signal on the movement within the specific frequency range. This compensates for the infrared detection module 20's... The infrared detection area exhibits a characteristic low response to radial movement in the detection direction of the presence detection device. Furthermore, it can detect micro-movements within the infrared detection blind zone, including static limb movements and / or breathing and / or heartbeats. Simultaneously, by adjusting the number of blind zone defining media 20 and / or adjusting the position of the blind zone defining media relative to the partitioned field of view of the infrared detection module, the detection range of the presence detection device can be precisely controlled. This enables accurate detection of the presence or absence of a human body, as well as the location and behavior of the human body within the detection area. It allows for simultaneous judgment of the human body's location and behavioral state within the detection area based on corresponding judgment rules using both the first and second detection modes. This allows for further refinement of the judgment of the human body's behavioral state, enabling intelligent control adaptable to different application scenarios.

[0147] To further understand the present invention, the present invention also provides a method for defining the detection range of a presence detection device, wherein the presence detection device includes an infrared detection module 20 and a microwave detection module 30, and the method for defining the detection range of the presence detection device includes the following steps:

[0148] (A) At least one blind zone defining medium 22 is movably set in the partitioned field of view of the infrared detection module 20, wherein the infrared detection module 20 obtains the detection result of whether a human body exists based on the feedback of cross-regional movement of a human body within the target detection area based on the partitioning of a target detection area by a Fresnel lens 21, and the microwave detection module 30 obtains the detection result of whether a human body exists based on the Doppler effect principle with a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the excitation signal and the echo signal to provide feedback on the activity presence characteristics corresponding to the human body movement, and / or obtains the detection result of whether a human body exists based on the feedback of the amplitude fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time to the corresponding frequency of the movement, wherein the detection area formed by the infrared detection module 20 in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module;

[0149] (B) The position of the blind zone defining medium 22 is changed in the partitioned field of view of the infrared detection module 20 by means of adjusting the blind zone defining medium 22, so as to adjust the detection blind zone of the infrared detection module 20 in the target detection area, thereby realizing the adjustment and definition of the infrared detection area and the infrared detection blind zone.

[0150] It is worth mentioning that the detection directions of the infrared detection module 20 and the microwave detection module 30 are set laterally. Based on the definition of the infrared detection blind zone by the blind zone defining medium 22, the infrared detection area and the infrared detection blind zone are arranged laterally in layers within the target detection area. Based on the correspondence between the corresponding layer height and the height of the human body in different postures, and according to the combination of the detection results obtained by the infrared detection module 20 and the microwave detection module 30, the layered position of the human body in the target detection area is identified, thereby identifying the posture of the human body in the target detection area.

[0151] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A detection device is present, characterized in that, include: An infrared detection module, which is based on a Fresnel lens to partition a target detection area, and obtains the detection result of whether a human body is present or not by feedback on the cross-regional movement of a human body within the target detection area; A microwave detection module is provided, which is allowed to be excited by an excitation signal to emit at least one microwave beam corresponding to the frequency of the excitation signal, and to receive a reflected echo formed by the microwave beam being reflected by a corresponding object to generate a corresponding echo signal to detect the target detection area. The detection results are obtained by using a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the excitation signal and the echo signal, based on the Doppler effect principle, to provide feedback on the activity characteristics corresponding to human movement, and / or by using the amplitude fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time to provide feedback on the corresponding frequency of movement. The detection area formed by the infrared detection module in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module. as well as At least one blind zone defining medium is provided, wherein the blind zone defining medium is disposed at the partitioned field of view of the infrared detection module to define the infrared detection blind zone of the infrared detection module in the target detection area. Then, based on the combined judgment of the detection results obtained by the infrared detection module and the microwave detection module, in the state where the infrared detection module does not obtain the detection result of the presence of a human body, the detection result of the microwave detection module is used to feed back the human body presence characteristics in the infrared detection blind zone. Thus, based on the definition of the infrared detection blind zone by the blind zone defining medium, the detection range of the microwave detection module is defined.

2. The presence detection device according to claim 1, wherein the presence detection device makes a combined judgment based on the detection results obtained by the infrared detection module and the microwave detection module to identify the presence location of a human body in the target detection area.

3. The presence detection device according to claim 2, wherein the detection direction of the infrared detection module and the detection direction of the microwave detection module are laterally arranged, wherein the infrared detection area and the infrared detection blind area are laterally layered in the target detection area based on the definition of the infrared detection blind area by the blind area defining medium, so as to identify the posture of the human body according to the layered presence position of the human body in the target detection area based on the correspondence between the corresponding layer height and the height of the human body in different postures.

4. The presence detection device according to claim 3, wherein the number of infrared detection modules is at least two, wherein the detection direction of each infrared detection module is laterally arranged to define the infrared detection blind zone of the corresponding infrared detection module based on at least one blind zone defining medium, forming a laterally layered arrangement of the infrared detection area and the infrared detection blind zone in the target detection area, so as to improve the accuracy of identifying the posture of the human body based on the layered presence position of the human body in the target detection area based on the correspondence between the different layered heights of the target detection area and the height of the human body in different postures.

5. The presence detection device according to claim 2, wherein in the state where the infrared detection module obtains the detection result of the presence of a human body, the presence detection device further obtains the detection result of whether a human body is present or not using the microwave detection module, and in the state where the microwave detection module obtains the detection result of the presence of a human body, it determines that the human body is located in the infrared detection area.

6. The presence detection device according to claim 5, wherein in the state where the infrared detection module does not obtain a detection result of the presence of a human body, the presence detection device obtains a detection result of the presence or absence of a human body using the microwave detection module, and in the state where the microwave detection module obtains a detection result of the presence of a human body, it determines that the human body is located in the infrared detection blind zone.

7. The presence detection device according to claim 6, wherein in the state where the microwave detection module does not obtain the detection result of the presence feature of activity, the presence detection device obtains the detection result of the static presence feature of the human body, including static limb movements and / or breathing and / or heartbeat movements, through the microwave detection module, and in the state where the microwave detection module obtains the detection result of the static presence feature, it determines that the human body is located in the infrared detection blind zone in a static state.

8. The presence detection device according to claim 1, wherein the blind zone defining medium is disposed between the infrared detection module and the Fresnel lens.

9. The presence detection device according to claim 1, wherein the Fresnel lens is disposed between the infrared detection module and the blind zone defining medium.

10. The presence detection device according to claim 1, wherein the microwave detection module detects the presence of a human body by comprising the following steps: (a) Transmitting the microwave beam corresponding to the frequency of the excitation signal; (b) Receive the reflected echo formed by the microwave beam being reflected by a corresponding object and generate the corresponding echo signal; (c) Generating the Doppler intermediate frequency signal based on the frequency / phase difference between the excitation signal and the echo signal using a frequency mixing detection method, and detecting the presence of a human body based on feedback of the corresponding amplitude of the Doppler intermediate frequency signal in the frequency spectrum, energy spectrum, power spectrum, or amplitude to the activity characteristics corresponding to human movement; and / or, (d) Based on the frequency change of the Doppler intermediate frequency signal over time, the Doppler intermediate frequency signal is converted into the wave signal, that is, the wave signal is the frequency change signal of the Doppler intermediate frequency signal over time; (e) Selecting a specific frequency range of the wave signal in the wave signal by filtering, wherein the specific frequency range is within a frequency range of less than 120 Hz, i.e., the set of the specific frequency range is a subset of the set of frequency ranges of less than 120 Hz, to detect the presence of a human body by feedback of human movement in the specific frequency range based on the corresponding amplitude of the wave signal in the frequency spectrum, energy spectrum, power spectrum or amplitude of the specific frequency range.

11. The presence detection device according to claim 10, wherein the specific frequency range is set to a frequency range of less than or equal to 50 Hz.

12. The presence detection device according to claim 11, wherein the specific frequency range is set to a frequency range of less than or equal to 5 Hz.

13. The presence detection device according to claim 12, wherein the specific frequency range is set to a frequency range of less than or equal to 1 Hz.

14. The presence detection device according to claim 1, wherein the presence detection device includes a processor module, the presence detection device has a first detection mode and a second detection mode, the infrared detection module and the microwave detection module are communicatively connected to the processor module, wherein in the first detection mode, the presence detection device uses the infrared detection module to obtain the detection result of whether a human body is present or not, wherein in the second detection mode, the presence detection device uses the microwave detection module to obtain the detection result of whether a human body is present or not, wherein when the presence detection device is powered on, the infrared detection module is powered, corresponding to the presence detection device operating in the first detection mode, wherein the microwave detection module is powered / excited under the control of the processor module, wherein the processor module is configured to extend the timing of t1 time based on the detection result of the infrared detection module detecting the presence of a human body in the infrared detection area, and extend the timing of t1 time, and after the timing of t1 time ends, time t2 time is counted, and within t2 time, the microwave detection module is activated / wake-up at least once based on the power supply / excitation control of the microwave detection module to enter the second detection mode.

15. The presence detection device according to claim 14, wherein the processor module is configured to trigger the start / wake-up control of the microwave detection module based on the end delay of a timeout of duration t1.

16. The presence detection device according to claim 15, wherein in the second detection mode, the first detection mode is maintained.

17. The presence detection device according to claim 14, wherein the presence detection device is configured to be powered by dual batteries, such that, in the state where the presence detection device is connected to batteries, one battery powers the infrared detection module and the other battery powers the microwave detection module.

18. The presence detection device according to claim 14, wherein the processor module is configured to extend the duration of t2 by forming a condition for extending the duration of t2 based on the detection result of detecting the presence of a human body in the detection area according to the second detection mode during the timing process of t2.

19. The presence detection device according to claim 18, wherein the processor module is configured to reset the timing of the second detection mode after a delay during the timing process of t2 based on the detection result of the presence of a human body detected in the second detection mode, so as to form a continuation of the second detection mode for the second detection mode.

20. The presence detection device according to any one of claims 1 to 19, wherein the installation arrangement of the infrared detection module and the microwave detection module satisfies that the detection space of the infrared detection module and the detection space of the microwave detection module have an interleaved space.

21. The presence detection device according to claim 20, wherein the blind zone defining medium is movably disposed in the partitioned field of view of the infrared detection module.

22. The presence detection device according to claim 21, wherein the presence detection device includes a communication module, the infrared detection module and the microwave detection module are communicatively connected to the communication module, and the communication module sends a control signal based on the detection results obtained by the infrared detection module and the microwave detection module to control the operating state of at least one electrical device.

23. A method for defining the detection range of a detection device, characterized in that, The presence detection device includes an infrared detection module and a microwave detection module. The method for defining the detection range of the presence detection device includes the following steps: (A) At least one blind zone is movably set to define the partitioned field of view of the infrared detection module. The infrared detection module partitions a target detection area based on a Fresnel lens and obtains the detection result of whether a human body exists by feedback on the cross-regional movement of a human body within the target detection area. The microwave detection module is allowed to be excited by an excitation signal to emit at least one microwave beam corresponding to the frequency of the excitation signal, and to receive a reflected echo formed by the microwave beam being reflected by a corresponding object to generate a corresponding echo signal to detect the target detection area. The microwave detection module uses a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the excitation signal and the echo signal to provide feedback on the activity characteristics corresponding to the human body movement based on the Doppler effect principle, and / or uses the fluctuation frequency of a wave signal formed by the frequency change of the Doppler intermediate frequency signal over time to provide feedback on the corresponding frequency of the movement to obtain the detection result of whether a human body exists. The detection area formed by the infrared detection module in the target detection area is the infrared detection area of ​​the infrared detection module, and the target detection area outside the infrared detection area is the infrared detection blind zone of the infrared detection module. (B) The position of the blind zone defining medium is changed in the partitioned field of view of the infrared detection module by means of adjusting the blind zone defining medium, so as to adjust the infrared detection blind zone of the infrared detection module in the target detection area, thereby realizing the adjustment and definition of the infrared detection area and the infrared detection blind zone.

24. The method for defining the range of the presence detection device according to claim 23, wherein the detection direction of the infrared detection module and the detection direction of the microwave detection module are laterally arranged, wherein the infrared detection area and the infrared detection blind area are laterally layered in the target detection area based on the definition of the infrared detection blind area by the blind area defining medium, so as to identify the layered presence position of the human body in the target detection area based on the correspondence between the corresponding layer height and the height of the human body in different postures, and based on the combination of the detection results obtained by the infrared detection module and the microwave detection module, thereby identifying the posture of the human body in the target detection area.

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