Anti-interference microwave induction device and electronic equipment

Abstract

The invention provides an anti-interference microwave induction system and electronic equipment. The system comprises a microwave induction radar, a filter circuit module, a signal processing module and a control module, the microwave induction radar is used for inputting the acquired induction signal to the filter circuit module and working according to the control signal output by the control module; the filter circuit module is used for filtering the induction signal and then outputting the induction signal to the signal processing module; the signal processing module is used for performing signal processing according to the induction signal after filtering processing and outputting a target signal to the control module; and the control module is used for generating a corresponding adjustment signal according to the target signal and sending the adjustment signal to the target equipment, so that the target equipment executes an adjustment action according to the adjustment signal. The microwave sensing system can resist interference through the sliding mean filtering algorithm and the hardware filtering circuit, is suitable for various complex environments, is not easily influenced by external environmental factors, and realizes accurate sensing of a sensing object.

Description

Technical Field

[0001] The present application relates to the field of microwave sensing technology, and in particular to an anti-interference microwave sensing device and electronic equipment. Background Art

[0002] In today's rapidly developing technological era, microwave sensing systems have become increasingly important due to their wide applications in automatic doors, security monitoring, traffic management, etc. Microwave sensing systems are usually based on the principle of Doppler radar, which detects the movement of objects by transmitting and receiving microwave signals and triggers the action of corresponding equipment.

[0003] However, the existing microwave sensing systems have some limitations: the sensing distance of most traditional microwave sensing systems is preset and fixed, lacking flexibility and difficult to adapt to changing application requirements; in complex electromagnetic environments, existing systems often have difficulty effectively resisting noise and interference from other frequency bands, resulting in unstable performance and increased false alarm rates; existing technologies have certain errors in sensing accuracy, which may become a limiting factor in application scenarios with high accuracy requirements. It can be seen that the existing microwave sensing systems have problems such as fixed sensing distance, susceptibility to interference, and poor sensing accuracy, and have great limitations. Summary of the invention

[0004] In order to solve the problems of fixed sensing distance, easy interference and poor sensing accuracy of traditional microwave sensing systems, the present application provides an anti-interference microwave sensing device and electronic equipment, the main purpose of which is to make the microwave sensing system anti-interference from both software and hardware aspects through a sliding mean filtering algorithm and a hardware filtering circuit, suitable for a variety of complex environments, unaffected by external environmental factors such as light, dust, temperature, multi-band interference, etc., to achieve accurate perception of the sensing object.

[0005] To achieve the above-mentioned purpose, the present application provides an anti-interference microwave sensing device, including a microwave sensing radar, a filtering circuit module, a signal processing module and a control module;

[0006] The microwave induction radar is connected to the control module and the filter circuit module respectively, and is used to obtain the induction signal, input the induction signal to the filter circuit module, and work according to the control signal output by the control module;

[0007] The filtering circuit module is connected to the microwave sensing radar and the signal processing module respectively, and is used to perform filtering processing according to the received sensing signal, and output the filtered sensing signal to the signal processing module;

[0008] The signal processing module is connected to the filter circuit module and the control module respectively, and is used to perform signal processing according to the received filtered sensing signal, and output a target signal to the control module;

[0009] The control module is connected to the microwave induction radar and the signal processing module respectively, and is used to generate a corresponding adjustment signal according to the received target signal, and send the adjustment signal to the corresponding target device so that the target device performs a corresponding adjustment action according to the adjustment signal.

[0010] Furthermore, in some embodiments of the present application, the control module is also used to receive a distance adjustment signal sent by an external circuit connected to it, generate a corresponding control signal according to the distance adjustment signal, and send the control signal to the microwave sensing radar to adjust the sensing distance of the microwave sensing radar.

[0011] Furthermore, in some embodiments of the present application, the control module is used to adjust the duty cycle of the power supply voltage of the microwave sensing radar according to the control signal to adjust the sensing distance of the microwave sensing radar.

[0012] Furthermore, in some embodiments of the present application, the microwave sensing radar is used to determine the intensity and frequency of the emitted microwave signal according to the control signal, transmit the microwave signal to the target space, and receive the sensing signal after being reflected by any target object in the target space.

[0013] Further, in some embodiments of the present application, the filtering circuit module includes a two-stage π-type RC filtering circuit, and the two-stage π-type RC filtering circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor; one end of the first resistor is connected to the sensing signal, one end of the first resistor is also connected to one end of the first capacitor, the other end of the first resistor is respectively connected to one end of the second resistor and one end of the second capacitor, one end of the second resistor is also connected to one end of the second capacitor, the other end of the second resistor is connected to one end of the third capacitor, and the other end of the second resistor is also connected to the signal processing module.

[0014] Further, in some embodiments of the present application, the signal processing module includes a first chip, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first inductor, a second inductor and a third resistor; the first end of the first chip is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the fourth capacitor, the second end of the first chip is connected to one end of the fifth capacitor, the third end of the first chip is connected to one end of the sixth capacitor, the fourth end of the first chip is connected to one end of the first inductor, the fifth end of the first chip is connected to one end of the second inductor, the sixth end of the first chip is connected to one end of the seventh capacitor, the seventh end of the first chip is connected to one end of the eighth capacitor, the eighth end of the first chip is connected to one end of the ninth capacitor, the ninth end of the first chip is connected to one end of the tenth capacitor, and the tenth end of the first chip is connected to the other end of the tenth capacitor.

[0015] Furthermore, in some embodiments of the present application, the control module includes a second chip and a control circuit, the second chip is connected to the control circuit, the control circuit includes a fourth resistor, a fifth resistor, an eleventh capacitor and a first diode, one end of the fourth resistor is respectively connected to one end of the fifth resistor, one end of the eleventh capacitor and the cathode of the first diode, and the cathode of the first diode is also connected to one end of the fifth resistor and one end of the eleventh capacitor.

[0016] Furthermore, in some embodiments of the present application, the control module uses the IIC protocol to adjust the sensing distance of the microwave sensing radar through the F1 pin and the F2 pin of the second chip.

[0017] Furthermore, in some embodiments of the present application, the signal processing module is specifically used to: initialize the filter queue; whenever the system collects a new sampling value, add the new sampling value to the end of the filter queue and remove the first sampling value of the filter sequence; calculate the weighted coefficient corresponding to the filter sequence at the current moment; based on the weighted coefficient, calculate the weighted average value corresponding to the filter sequence at the current moment to obtain the filtering result.

[0018] An embodiment of the present application also provides an electronic device, comprising the anti-interference microwave sensing system as described above.

[0019] Implementing the embodiments of the present application has the following beneficial effects:

[0020] As described above, the present application provides an anti-interference microwave sensing system and electronic device, which includes a microwave sensing radar, a filter circuit module, a signal processing module and a control module; wherein the microwave sensing radar is respectively connected to the control module and the filter circuit module, and is used to obtain a sensing signal, and input the sensing signal to the filter circuit, and is used to work according to the control signal output by the received control module; the filter circuit module is respectively connected to the microwave sensing radar and the signal processing module, and is used to perform filtering processing according to the received sensing signal, and output the filtered sensing signal to the signal processing module; the signal processing module is respectively connected to the filter circuit module and the control module, and is used to perform signal processing according to the received filtered sensing signal, and output the target signal to the control module; the control module is respectively connected to the microwave sensing radar and the signal processing module, and is used to generate a corresponding adjustment signal according to the received target signal, and send the adjustment signal to the corresponding target device, so that the target device performs the corresponding adjustment action according to the adjustment signal. It can be seen that the present application makes the module anti-interference from both software and hardware aspects through the sliding mean filtering algorithm and the hardware filtering circuit, uses the algorithm to use probability for filtering and tracking of the sensing object, and uses the hardware filtering circuit to optimize the input signal, so that the anti-interference microwave sensing system provided by the present application can be applied to a variety of complex environments, and is not affected by external environmental factors such as light, dust, temperature, and multi-band interference. In addition, the sensing distance can be infinitely adjusted according to needs to achieve accurate perception of the sensing object. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an anti-interference microwave sensing system in one embodiment of the present application;

[0022] Figure 2 1 is a circuit schematic diagram of a double-stage π-type RC filter circuit in an embodiment of the present application;

[0023] Figure 3 This is a circuit schematic diagram of a signal processing module in one embodiment of the present application;

[0024] Figure 4 This is a circuit schematic diagram of a control module in one embodiment of the present application;

[0025] Figure 5 Schematic diagram of the flow of the filtering algorithm in one embodiment of the present application.

[0026] Illustration: 10-microwave induction radar; 20-filter circuit module; 30-signal processing module; 40-control module; R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; R5-fifth resistor; R6-sixth resistor; R7-seventh resistor; R8-eighth resistor; R9-ninth resistor; R10-tenth resistor; R11-eleventh resistor; C1-first capacitor; C2-second capacitor; C3-third capacitor; C4-fourth capacitor; C5-fifth capacitor; C6-sixth capacitor; C7-seventh capacitor; C8-eighth capacitor; C9-ninth capacitor; C10-tenth capacitor; C11-eleventh capacitor; L1-first inductor; L2-second inductor; D1-first diode; U1-first chip; U2-second chip.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of this application. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] Figure 1 Schematic diagram of the structure of an anti-interference microwave induction system in one embodiment of the present application. Figure 1 , the anti-interference microwave sensing system may specifically include a microwave sensing radar 10, a filter circuit module 20, a signal processing module 30 and a control module 40;

[0030] The microwave induction radar 10 is connected to the control module 40 and the filter circuit module 20 respectively, and is used to obtain the induction signal, input the induction signal to the filter circuit module 20, and work according to the control signal output by the control module 40;

[0031] Specifically, the microwave sensing radar 10 is responsible for emitting a microwave signal of a specific frequency according to the control signal output by the received control module 40, and receiving the signal reflected by the object, namely the sensing signal; by analyzing the Doppler frequency shift in the reflected signal, the radar can detect the movement speed and direction of the object, and input the sensing signal to the filter circuit module 20 for preliminary filtering processing.

[0032] The filter circuit module 20 is connected to the microwave induction radar 10 and the signal processing module 30 respectively, and is used to perform filtering processing according to the received sensing signal and output the filtered sensing signal to the signal processing module 30;

[0033] Specifically, for the filter circuit module 20, one end of the filter circuit module 20 is connected to the microwave induction radar 10, and the other end is connected to the signal processing module 30. After the filter circuit module 20 receives the sensing signal sent by the microwave induction radar 10, it performs preliminary filtering processing on the sensing signal, preliminarily removes noise and interference in the received sensing signal, and outputs the filtered sensing signal to the signal processing module 30. The filter circuit module 20 can design specific filter parameters according to different interference characteristics to achieve a better filtering effect.

[0034] The signal processing module 30 is connected to the filter circuit module 20 and the control module 40 respectively, and is used to perform signal processing according to the received filtered sensing signal and output a target signal to the control module 40;

[0035] Specifically, for the signal processing module 30, the input end of the signal processing module 30 is connected to the output end of the filter circuit module 20, and the output end of the signal processing module 30 is connected to the input end of the control module 40. The signal processing module 30 is mainly used to receive the filtered sensing signal sent by the filter circuit module 20, and perform signal optimization processing on the filtered sensing signal through a single-chip microcomputer or other digital signal processor to obtain a target signal, and send the target signal to the control module 40. The signal processing module 30 can integrate more advanced signal processing algorithms, such as adaptive filtering and machine learning algorithms, to improve the intelligence level of the system.

[0036] The control module 40 is connected to the microwave induction radar 10 and the signal processing module 30 respectively, and is used to generate a corresponding adjustment signal according to the received target signal, and send the adjustment signal to the corresponding target device, so that the target device performs a corresponding adjustment action according to the adjustment signal;

[0037] Specifically, for the control module 40, the input end of the control module 40 is connected to the output end of the signal processing module 30, and the output end of the control module 40 is connected to the microwave induction radar 10. After receiving the target signal sent by the signal processing module 30, the control module 40 generates a corresponding adjustment signal according to the target signal, and the adjustment signal is used to adjust the state of the target device. For example, the control module 40 sends the adjustment signal to the target device connected thereto, so that the target device performs the corresponding adjustment action according to the adjustment signal, thereby adjusting the state of the target device. The control module 40 can be designed to have a user-friendly interface, allowing the user to easily configure the system according to application requirements.

[0038] Furthermore, in some embodiments, the control module is also used to receive a distance adjustment signal sent from an external device connected to it, generate a corresponding control signal according to the distance adjustment signal, and send the control signal to the microwave sensing radar to adjust the sensing distance of the microwave sensing radar.

[0039] Specifically, the control module in this embodiment will also receive a distance adjustment signal sent by an external circuit connected to it, thereby generating a corresponding control signal according to the distance adjustment signal, and finally sending the control signal to the microwave sensing radar, thereby adjusting the sensing distance of the microwave sensing radar.

[0040] Furthermore, in some embodiments, the control module is used to adjust the duty cycle of the power supply voltage of the microwave sensing radar according to the control signal to adjust the sensing distance of the microwave sensing radar.

[0041] Specifically, the control module in this embodiment mainly adjusts the sensing distance of the microwave sensing radar through a control signal, for example, by adjusting the power supply voltage duty cycle of the microwave sensing radar through a PWM signal (pulse width modulation signal), thereby adjusting the sensing distance of the microwave sensing system.

[0042] Furthermore, in some embodiments, the microwave sensing radar is used to determine the intensity and frequency of the emitted microwave signal according to the control signal, transmit the microwave signal to the target space, and receive the sensing signal after being reflected by any target object in the target space.

[0043] Specifically, the microwave sensing radar in this embodiment mainly determines the intensity and frequency of the microwave signal emitted this time according to the control signal sent by the control module, that is, determines the sensing distance of this microwave sensing radar, and then sends the microwave signal to the target space, and receives the sensing signal after being reflected by any target object in the target space. The target object can be a moving object. Finally, the sensing signal is sent to the filtering circuit module for preliminary filtering processing, so as to perform subsequent signal optimization processing and stepless adjustment.

[0044] Further, in some embodiments, the filtering circuit module includes a two-stage π-type RC filtering circuit, and the two-stage π-type RC filtering circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor; one end of the first resistor is connected to the sensing signal, one end of the first resistor is also connected to one end of the first capacitor, the other end of the first resistor is respectively connected to one end of the second resistor and one end of the second capacitor, one end of the second resistor is also connected to one end of the second capacitor, the other end of the second resistor is connected to one end of the third capacitor, and the other end of the second resistor is also connected to the signal processing module.

[0045] Specifically, the filter circuit module in this embodiment may be a double-stage π-type RC filter circuit, which includes a first section π-type RC filter circuit and a second section π-type RC filter circuit. Figure 2 As shown, the two-stage π-type RC filter circuit may specifically include a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a third capacitor C3, wherein the first resistor R1 and the second resistor R2 are filter resistors, the first capacitor C1, the first resistor R1 and the second capacitor C2 constitute a first section of the π-type RC filter circuit, and the second capacitor C2, the second resistor R2 and the third capacitor C3 constitute a second section of the π-type RC filter circuit. Figure 2 As shown, one end of the first resistor R1 is connected to the sensing signal, one end of the first resistor R1 is also connected to one end of the first capacitor C1, the other end of the first resistor R1 is respectively connected to one end of the second resistor R2 and one end of the second capacitor C2, one end of the second resistor R2 is also connected to one end of the second capacitor C2, the other end of the second resistor R2 is connected to one end of the third capacitor C3, and the other end of the second resistor R2 is also connected to the single chip microcomputer of the signal processing module 30. This embodiment uses a two-stage RC filter circuit to optimize the input signal to achieve the preliminary anti-interference function of the microwave sensing system.

[0046] Further, in some embodiments, the signal processing module includes a first chip, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first inductor, a second inductor and a third resistor; the first end of the first chip is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the fourth capacitor, the second end of the first chip is connected to one end of the fifth capacitor, the third end of the first chip is connected to one end of the sixth capacitor, the fourth end of the first chip is connected to one end of the first inductor, the fifth end of the first chip is connected to one end of the second inductor, the sixth end of the first chip is connected to one end of the seventh capacitor, the seventh end of the first chip is connected to one end of the eighth capacitor, the eighth end of the first chip is connected to one end of the ninth capacitor, the ninth end of the first chip is connected to one end of the tenth capacitor, and the tenth end of the first chip is connected to the other end of the tenth capacitor.

[0047] Specifically, the signal processing module is a key part of the anti-interference microwave sensing system, which is responsible for receiving, processing and analyzing the signals from the microwave receiving module to extract useful information and provide a basis for system decision-making. The main function of the signal processing module is to remove noise and interference, extract the characteristics of the target signal, and convert it into useful data output, including analog-to-digital converter (ADC), digital signal processor (DSP), microcontroller or microprocessor, and related software algorithms; the signal processing module also converts the analog signal of the receiving module into a digital signal for further processing by the digital signal processor; the signal processing module also applies various digital filtering techniques, such as sliding mean filtering, Kalman filtering, adaptive filtering, etc., to improve the signal quality, and finally converts the processed data into useful information displayed by the control signal or user interface.

[0048] like Figure 3 As shown, the signal processing module in this embodiment may specifically include a first chip U1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a first inductor L1, a second inductor L2 and a third resistor R3; a first end of the first chip U1 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to one end of the fourth capacitor C4, a second end of the first chip U1 is connected to one end of the fifth capacitor C5, a third end of the first chip U1 is connected to one end of the sixth capacitor C6, a fourth end of the first chip U1 is connected to one end of the first inductor L1, a fifth end of the first chip U1 is connected to one end of the second inductor L2, a sixth end of the first chip U1 is connected to one end of the seventh capacitor C7, a seventh end of the first chip U1 is connected to one end of the eighth capacitor C8, an eighth end of the first chip U1 is connected to one end of the ninth capacitor C9, a ninth end of the first chip U1 is connected to one end of the tenth capacitor C10, and a tenth end of the first chip U1 is connected to the other end of the tenth capacitor C10.

[0049] Further, in some embodiments, the control module includes a second chip and a control circuit, the second chip is connected to the control circuit, the control circuit includes a fourth resistor, a fifth resistor, an eleventh capacitor and a first diode, one end of the fourth resistor is respectively connected to one end of the fifth resistor, one end of the eleventh capacitor and the cathode of the first diode, and the cathode of the first diode is also connected to one end of the fifth resistor and one end of the eleventh capacitor.

[0050] Specifically, the main function of the control module is to adjust the working state of the microwave induction radar according to the output of the signal processing module and the parameters set by the user; it usually includes components such as a microcontroller, an interface circuit, a drive circuit, and a PWM (pulse width modulation) signal generator. The control module uses a PWM signal generator to adjust the power and duty cycle of the radar transmission signal to achieve stepless adjustment of the sensing distance. At the same time, the control system exchanges data with the signal processing module and the user interface through IIC (Inter-Integrated Circuit) or other communication protocols. In addition, the control module also receives feedback information from the radar and signal processing module, and dynamically adjusts the system settings to optimize performance.

[0051] like Figure 4 As shown, the control module in this embodiment may specifically include a second chip U2 and a control circuit. The second chip U2 is connected to the control circuit. The control circuit includes a fourth resistor R4, a fifth resistor R5, an eleventh capacitor C11 and a first diode D1. One end of the fourth resistor R4 is respectively connected to one end of the fifth resistor R5, one end of the eleventh capacitor C11 and the cathode of the first diode D1. The cathode of the first diode D1 is also connected to one end of the fifth resistor R5 and one end of the eleventh capacitor C11.

[0052] Furthermore, in some embodiments, the control module uses the IIC protocol to adjust the sensing distance of the microwave sensing radar through the F1 pin and the F2 pin of the second chip.

[0053] Specifically, the control module in this embodiment can realize stepless adjustment of the sensing distance of the microwave sensing system by means of the IIC protocol through the F1 and F2 pins. The adjustment method is to output PWM to change the duty cycle of the sensing radar power supply voltage to adjust the sensing distance of the microwave sensing system. The PWM signal allows the sensing distance to be infinitely (continuously) adjusted, rather than switching between only a few fixed distance points, which means that the system can accurately adjust the sensing distance as needed to adapt to different application scenarios. When the system detects a sensing signal, it can be output to the relevant response device through the out1 pin.

[0054] Furthermore, in some embodiments, the signal processing module is specifically used to: initialize the filter queue; whenever the system collects a new sampling value, add the new sampling value to the end of the filter queue and remove the first sampling value of the filter sequence; calculate the weighting coefficient corresponding to the filter sequence at the current moment; based on the weighting coefficient, calculate the weighted average value corresponding to the filter sequence at the current moment to obtain the filtering result.

[0055] Specifically, the signal processing module in this embodiment mainly uses a sliding mean filtering algorithm to optimize the signal of the filtered sensing signal. After the input signal passes through the filtering circuit, it enters the single-chip microcomputer via RX and TX, and then uses the sliding mean filtering algorithm to optimize the signal. After being processed by the single-chip microcomputer, out-1 is output to the next-level single-chip microcomputer system. The principle of sliding mean filtering is to regard N consecutive sampling values ​​as a queue, and the queue length is fixed to N; every time a new data is sampled and put into the end of the queue, the data at the head of the queue is discarded. The N data in the queue are averaged to obtain a new filtering result. The sliding mean filtering algorithm has a good inhibitory effect on periodic interference and has high smoothness; it is suitable for high-frequency systems. The calculation formula is: y(k)=y(k-1)+[x(k)-x(kN)] / N. Where N is the length of the filter queue. The filtering algorithm process is as follows Figure 5 shown.

[0056] This embodiment also provides an electronic device, including the anti-interference microwave sensing system as described above.

[0057] As can be seen from the above, an anti-interference microwave sensing system and electronic device provided in the embodiment of the present application include a microwave sensing radar, a filter circuit module, a signal processing module and a control module; wherein the microwave sensing radar is respectively connected to the control module and the filter circuit module, used to obtain the sensing signal, and input the sensing signal to the filter circuit, and used to work according to the control signal output by the received control module; the filter circuit module is respectively connected to the microwave sensing radar and the signal processing module, used to filter the received sensing signal and output the filtered sensing signal to the signal processing module; the signal processing module is respectively connected to the filter circuit module and the control module, used to perform signal processing according to the received filtered sensing signal and output the target signal to the control module; the control module is respectively connected to the microwave sensing radar and the signal processing module, used to generate a corresponding adjustment signal according to the received target signal, and send the adjustment signal to the corresponding target device, so that the target device performs the corresponding adjustment action according to the adjustment signal. .

[0058] Compared with traditional microwave sensing systems, the anti-interference microwave sensing system provided in this embodiment makes the module anti-interference from both software and hardware aspects through a sliding mean filtering algorithm and a hardware filtering circuit, uses an algorithm to use probability for filtering and tracking of sensing objects, and uses a hardware filtering circuit to optimize the input signal, so that the anti-interference microwave sensing system provided in this application can be applied to a variety of complex environments, is not affected by external environmental factors such as light, dust, temperature, and multi-band interference, and the sensing distance can be infinitely adjusted according to demand to achieve accurate perception of the sensing object.

[0059] The meaning of "first" and "second" in the above modules / units is only to distinguish different modules / units, and is not used to define which module / unit has a higher priority or other limiting meanings. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products or devices. The division of modules in this application is only a logical division, and there may be other division methods when implemented in actual applications.

[0060] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, device, article or method including the element.

[0061] The serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. Through the description of the above implementation modes, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases the former is a better implementation mode. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, including a number of instructions to enable a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0062] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An anti-interference microwave induction system, characterized in that: It includes microwave sensing radar, filtering circuit module, signal processing module and control module; The microwave induction radar is connected to the control module and the filter circuit module respectively, and is used to obtain the induction signal, input the induction signal to the filter circuit module, and work according to the control signal output by the control module; The filtering circuit module is connected to the microwave sensing radar and the signal processing module respectively, and is used to perform filtering processing according to the received sensing signal, and output the filtered sensing signal to the signal processing module; The signal processing module is connected to the filter circuit module and the control module respectively, and is used to perform signal processing according to the received filtered sensing signal, and output a target signal to the control module; The control module is connected to the microwave induction radar and the signal processing module respectively, and is used to generate a corresponding adjustment signal according to the received target signal, and send the adjustment signal to the corresponding target device so that the target device performs a corresponding adjustment action according to the adjustment signal.

2. The anti-interference microwave induction system according to claim 1, characterized in that: The control module is also used to receive a distance adjustment signal sent by an external circuit connected to it, generate a corresponding control signal according to the distance adjustment signal, and send the control signal to the microwave sensing radar to adjust the sensing distance of the microwave sensing radar.

3. The anti-interference microwave induction system according to claim 2, characterized in that: The control module is used to adjust the duty cycle of the power supply voltage of the microwave induction radar according to the control signal to adjust the sensing distance of the microwave induction radar.

4. The anti-interference microwave induction system according to claim 2, characterized in that: The microwave induction radar is used to determine the intensity and frequency of the emitted microwave signal according to the control signal, emit the microwave signal to the target space, and receive the induction signal reflected by any target object in the target space.

5. The anti-interference microwave induction system according to claim 1, characterized in that: The filtering circuit module includes a two-stage π-type RC filtering circuit, and the two-stage π-type RC filtering circuit includes a first resistor, a second resistor, a first capacitor, a second capacitor and a third capacitor; one end of the first resistor is connected to the induction signal, one end of the first resistor is also connected to one end of the first capacitor, the other end of the first resistor is respectively connected to one end of the second resistor and one end of the second capacitor, one end of the second resistor is also connected to one end of the second capacitor, the other end of the second resistor is connected to one end of the third capacitor, and the other end of the second resistor is also connected to the signal processing module.

6. The anti-interference microwave induction system according to claim 1, characterized in that: The signal processing module includes a first chip, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a first inductor, a second inductor and a third resistor; the first end of the first chip is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the fourth capacitor, the second end of the first chip is connected to one end of the fifth capacitor, the third end of the first chip is connected to one end of the sixth capacitor, the fourth end of the first chip is connected to one end of the first inductor, the fifth end of the first chip is connected to one end of the second inductor, the sixth end of the first chip is connected to one end of the seventh capacitor, the seventh end of the first chip is connected to one end of the eighth capacitor, the eighth end of the first chip is connected to one end of the ninth capacitor, the ninth end of the first chip is connected to one end of the tenth capacitor, and the tenth end of the first chip is connected to the other end of the tenth capacitor.

7. The anti-interference microwave induction system according to claim 1, characterized in that: The control module includes a second chip and a control circuit, the second chip is connected to the control circuit, the control circuit includes a fourth resistor, a fifth resistor, an eleventh capacitor and a first diode, one end of the fourth resistor is respectively connected to one end of the fifth resistor, one end of the eleventh capacitor and the cathode of the first diode, and the cathode of the first diode is also connected to one end of the fifth resistor and one end of the eleventh capacitor.

8. The anti-interference microwave induction system according to claim 7, characterized in that: The control module adjusts the sensing distance of the microwave sensing radar using the IIC protocol through the F1 pin and the F2 pin of the second chip.

9. The anti-interference microwave induction system according to claim 1, characterized in that: The signal processing module is specifically used to: initialize the filter queue; whenever the system collects a new sampling value, add the new sampling value to the end of the filter queue and remove the first sampling value of the filter sequence; calculate the weighted coefficient corresponding to the filter sequence at the current moment; based on the weighted coefficient, calculate the weighted average value corresponding to the filter sequence at the current moment to obtain the filtering result.

10. An electronic device, characterized in that: It comprises the anti-interference microwave induction system as claimed in any one of claims 1 to 9.

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