Air conditioner fresh air control method and device based on radar and fresh air conditioner

Abstract

The invention provides an air conditioner fresh air control method and device based on radar and a fresh air conditioner, and the method comprises the steps that first vibration waves are determined based on vibration sampling signals collected by a vibration sensor for an air conditioner indoor unit; in the process of controlling the vibration generator to output the second vibration wave, if it is determined that the current air quality data is in the target concentration interval, attitude feature data of all individuals are obtained through a radar module; and when it is determined that the posture feature data of at least one individual meets the target condition, a fresh air system of the fresh air conditioner is started. According to the air conditioner fresh air control method and device based on the radar and the fresh air conditioner, vibration waves emitted by the vibration emitter and vibration waves generated when the air conditioner runs can be subjected to superposition shock absorption, and on the basis that threshold value comparison is conducted according to the air quality, the noise is reduced; and interception judgment is carried out on starting of the fresh air system in combination with the individual posture monitored by the damping radar, and intelligence of fresh air control is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a radar-based air conditioning fresh air control method, device and fresh air air conditioner. Background Art

[0002] As people's living standards continue to improve, fresh air air conditioners or other equipment with fresh air functions can renew indoor air and improve indoor air quality by introducing outdoor fresh air or exhausting indoor polluted air.

[0003] Existing fresh air air conditioners or other equipment with fresh air function are mainly controlled by users to turn on and off, which is subject to great subjectivity and often not handled in a timely manner. However, the more active the human body is in a closed environment, the more oxygen it needs. If the indoor ventilation is not timely, it will cause symptoms such as chest tightness, shortness of breath, and hypoxia. Among the existing intelligent air conditioning control solutions based on human sensing, only the AI ​​technology solution based on face recognition can achieve accurate judgment of personnel types. However, this type of solution not only requires high-definition cameras, but also requires running face recognition algorithms, which will greatly increase the manufacturing cost of air conditioners and lead to a decline in the market competitiveness of related products.

[0004] As an alternative, radar sensing is a wireless sensing technology that can obtain vital signs data such as breathing rate, heart rate and body movement of people by processing and analyzing the received radar echo of the target with human characteristics. Millimeter wave radar is a radar that works in the millimeter wave (wavelength 1~10mm, frequency 30~300GHz) band. It is mostly used in air conditioners to realize functions such as turning on when people come, turning off when people leave, and no wind feeling. However, the vibration generated by the air conditioner itself during operation will affect the radar data collection and even cause blurred imaging. The longitudinal wave of longitudinal vibration will affect the vertical data collection of the target. Similarly, the transverse wave will affect the transverse data collection. If the amplitude is large, even the static target will be imaged as a moving target, which seriously affects the radar's perception accuracy of human activity. Therefore, how to match the human activity with the amount of fresh air supplement is an important issue that the industry needs to solve urgently. Summary of the invention

[0005] The present invention provides a radar-based air conditioning fresh air control method, device and fresh air air conditioner, which are used to solve the defect in the prior art that the fresh air control accuracy is poor due to the influence of radar imaging quality caused by the vibration of air conditioning operation.

[0006] The present invention provides a radar-based air conditioning fresh air control method, comprising:

[0007] Determine a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an indoor unit of the air conditioner;

[0008] In the process of controlling the vibration generator to output the second vibration wave, if it is determined that the current air quality data is within the target concentration range, the posture feature data of all individuals are obtained through the radar module;

[0009] When it is determined that the posture feature data of at least one individual meets the target condition, turning on the fresh air system of the fresh air air conditioner;

[0010] Among them, the lower limit value of the target concentration range is determined according to the standard concentration of indoor harmful gases and / or particulates; the target condition is determined according to the posture characteristics corresponding to the actions exhibited by an individual when the air quality is below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

[0011] According to a radar-based air conditioning fresh air control method provided by the present invention, after the fresh air system of the fresh air air conditioner is turned on, the method further includes:

[0012] Determine an acceleration change curve based on individual position information collected by the radar module within a preset period after the second vibration wave is eliminated;

[0013] When it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, the movement degree of each individual is determined based on the change trend of the acceleration change curve in the time domain;

[0014] Based on the exercise levels of all individuals, a target fresh air speed value is determined, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value;

[0015] Among them, the radar module after the vibration is eliminated by the second vibration wave uses the second vibration wave that has a phase difference of half a cycle with the first vibration wave to offset the vibration of the radar module caused by the first vibration wave under the propagation of the air-conditioning indoor unit.

[0016] According to a radar-based air conditioning fresh air control method provided by the present invention, when it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the movement degree of each individual is determined based on the change trend of the acceleration change curve in the time domain, including:

[0017] When it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain is respectively used as the time domain span value corresponding to each acceleration interval;

[0018] Determine the individual's degree of movement based on the acceleration interval corresponding to the maximum time domain span value;

[0019] The acceleration interval is a plurality of sub-intervals divided according to the absolute value of the acceleration, and each sub-interval is preset with a fresh air gear; the fresh air gear is positively correlated with the lower limit value of the acceleration interval.

[0020] According to a radar-based air conditioning fresh air control method provided by the present invention, after determining the acceleration change curve, the method further includes:

[0021] If it is determined that there is at least one individual whose acceleration corresponding to each time point in the acceleration change curve is 0 and the individual speed is continuously 0, the fan speed of the fresh air system is adjusted to the rated minimum value;

[0022] If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of each individual is not 0, the target fresh air speed value is determined based on the speed corresponding to the uniform motion of all individuals within the preset period, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0023] According to a radar-based air conditioning fresh air control method provided by the present invention, the posture feature data includes body feature data or facial feature data;

[0024] The target condition is determined based on body feature data of an individual when the individual nods frequently or covers the mouth continuously within a preset time period, or facial feature data of an individual when the individual yawns or blinks frequently within a preset time period.

[0025] According to a radar-based air conditioning fresh air control method provided by the present invention, the posture feature data includes body feature data and facial feature data;

[0026] The target condition is determined based on the body feature data and facial feature data of the individual when the individual covers his mouth or yawns continuously within a preset time period.

[0027] According to a radar-based air conditioning fresh air control method provided by the present invention, the first vibration wave is determined based on a vibration sampling signal collected by a vibration sensor from an air conditioning indoor unit, including:

[0028] Obtaining an average sampling period according to a plurality of vibration periods included in the vibration sampling signal, and obtaining an average sampling amplitude according to the vibration amplitude corresponding to the target sampling point in each vibration period;

[0029] generating the first vibration wave based on the average sampling period and the average sampling amplitude;

[0030] The target sampling points include peak sampling points and trough sampling points within the sampling period.

[0031] According to a radar-based air conditioning fresh air control method provided by the present invention, if the target sampling point is a sampling point other than the peak sampling point and the trough sampling point in the vibration period, the value of the target sampling point in the time domain includes and

[0032] Here, k is a positive integer greater than 2.

[0033] The present invention also provides a radar-based air conditioning fresh air control device, comprising:

[0034] A radar stabilization module, used to determine a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an indoor unit of the air conditioner;

[0035] The gas monitoring module is used to obtain the posture characteristic data of all individuals through the radar module when it is determined that the current air quality data is within the target concentration range during the process of controlling the vibration generator to output the second vibration wave;

[0036] A fresh air control module, for turning on a fresh air system of a fresh air air conditioner when it is determined that the posture feature data of at least one individual meets a target condition;

[0037] Among them, the lower limit value of the target concentration range is determined according to the standard concentration of indoor harmful gases and / or particulates; the target condition is determined according to the posture characteristics corresponding to the actions exhibited by an individual when the air quality is below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

[0038] The present invention also provides a fresh air air conditioner, comprising an air conditioner indoor unit, an air conditioner outdoor unit and a fresh air system;

[0039] The air conditioner indoor unit includes an air conditioner controller and a vibration elimination device that are communicatively connected, and also includes a memory and a program or instruction stored in the memory and executable on the air conditioner controller, wherein when the program or instruction is executed by the air conditioner controller, the radar-based air conditioner fresh air control method as described in any one of the above items is executed;

[0040] The vibration elimination device comprises a radar module, a vibration generator and a vibration sensor which are respectively connected to the air conditioning controller for communication;

[0041] The vibration sensor is used to sense the vibration of the air conditioner indoor unit; the vibration generator is used to eliminate the vibration of the radar module driven by the air conditioner indoor unit;

[0042] Wherein, the radar module is a millimeter wave radar.

[0043] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the radar-based air conditioning fresh air control methods described above.

[0044] The present invention also provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned radar-based air conditioning fresh air control methods.

[0045] The radar-based air conditioning fresh air control method, device and fresh air air conditioner provided by the present invention, through the vibration generator to send out the second vibration wave opposite to the actual first vibration wave to dampen the vibration propagated by the air conditioning indoor unit, and when it is determined that the current air quality data points to a certain degree of pollution in the room, and the individual posture monitored by the radar module in the damping state conforms to the natural physiological reaction of the human body in a polluted environment, the decision to turn on the fresh air system is made. The vibration wave sent by the vibration transmitter and the vibration wave generated by the air conditioner itself when it is running can be superimposed and damped, so that the air conditioning radar can be stably imaged during observation, and the opening of the fresh air system can be intercepted and judged based on the threshold comparison according to the air quality, and the individual posture monitored by the damping radar can be referred to, so as to bring certain reliability and intelligence to the control accuracy of the fresh air system, and take into account the energy efficiency of the equipment and the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 This is one of the flow charts of the radar-based air conditioning fresh air control method provided by the present invention;

[0048] Figure 2 It is a schematic diagram of the principle of vibration elimination of a radar module provided by the present invention;

[0049] Figure 3 This is the second flow chart of the radar-based air conditioning fresh air control method provided by the present invention;

[0050] Figure 4 It is a structural schematic diagram of the radar-based air conditioning fresh air control device provided by the present invention;

[0051] Figure 5 It is a structural schematic diagram of the fresh air air conditioner provided by the present invention. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0054] It should be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present invention, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0055] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0056] Figure 1 FIG. 1 is one of the flow charts of the radar-based air conditioning fresh air control method provided by the present invention. Figure 1As shown, the radar-based air conditioning fresh air control method provided by the embodiment of the present invention includes: step 101, determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an air conditioning indoor unit.

[0057] The first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave and the phase of the second vibration wave differ by half a period. The vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period. The vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

[0058] It should be noted that the execution subject of the radar-based air conditioning fresh air control method is a radar-based air conditioning fresh air control device, which can be set in an air conditioner.

[0059] The application scenario of the radar-based air conditioning fresh air control method provided by the embodiment of the present invention is that when the user activates the air conditioner, the vibration sensor is used to sense the changes in the vibration waveform generated by the air conditioner under different wind speeds and modes, and the vibration generator is used to emit an opposite waveform to offset the vibration caused by the radar module. When the radar module after vibration cancellation senses the presence of an individual, combined with the indoor harmful gas concentration and the posture information of key parts of the human body, the operation of the fresh air system and the operation mode are coordinated to make corresponding adjustments.

[0060] The radar module and the air quality sensor module periodically collect all individuals in the room for monitoring at a specified time interval, and send the perception information of each individual to the radar-based air conditioning fresh air control device. The embodiment of the present invention does not specifically limit the working cycle of the radar module and the air quality sensor module.

[0061] Optionally, both the radar module and the air quality sensor module can perform data collection operations in their respective default working cycles.

[0062] Optionally, the user can issue a cycle change instruction so that the radar module and / or the air quality sensor module receives and responds to the corresponding instruction, and changes the working cycle to the cycle indicated by the instruction to perform the collection operation.

[0063] It should be noted that before step 101, the user needs to send an activation instruction through a transmission medium to activate the working mode of the air conditioner, so that the indoor unit of the air conditioner runs at the default wind speed of the mode and the outdoor unit runs at the default frequency of the mode.

[0064] Optionally, the user can use the control device to transmit activation instructions by wireless communication between the control device and the fresh air air conditioner or the air conditioning system with fresh air function, so that the fresh air air conditioner or the air conditioning system with fresh air function initializes the working mode and starts the radar module.

[0065] Optionally, the user can issue an activation command through voice interaction. The fresh air air conditioner or the air conditioning system with fresh air function receives the activation command, performs voice recognition, initializes the working mode, and starts the radar module.

[0066] Specifically, in step 101, after receiving and responding to the activation instruction, the radar-based air conditioning fresh air control device controls the fan of the air conditioning indoor unit to run at the speed in this mode, and controls the compressor of the air conditioning outdoor unit to run at the power in this mode.

[0067] Since the operation of the fan will cause its own vibration to propagate to the air-conditioning indoor unit and its internal components, the radar-based air-conditioning fresh air control device periodically senses the vibration of the air-conditioning indoor unit through a vibration sensor, and fits the first vibration wave used to characterize the degree of air-conditioning vibration based on the vibration sampling signal collected within a sampling period.

[0068] The sampling period refers to the working period of the vibration sensor for sensing, and its value is at least an integer multiple of the air conditioner vibration period, which is not specifically limited in the embodiment of the present invention.

[0069] Step 102: During the process of controlling the vibration generator to output the second vibration wave, if it is determined that the current air quality data is within the target concentration range, the posture feature data of all individuals are acquired through the radar module.

[0070] The lower limit of the target concentration range is determined based on the standard concentration of indoor harmful gases and / or particles.

[0071] It should be noted that the types and quantities of the sensing devices for collecting air quality data in the embodiments of the present invention are not specifically limited.

[0072] Exemplarily, the sensing device may include a harmful gas sensor and / or a particle sensor.

[0073] Among them, harmful gas sensors include but are not limited to sensors for detecting the concentration of gases such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), and carbon monoxide (CO).

[0074] Particle sensors include but are not limited to sensors for detecting the concentration of particles of different diameters, such as fine particulate matter (PM2.5) and inhalable particulate matter (PM10).

[0075] For example, the sensing device may include a variety of sensing elements such as a carbon dioxide sensor, a PM2.5 sensor, or a total volatile organic compound (TVOC) sensor with an integrated monitoring function. The radar-based air conditioning fresh air control device integrates the concentration information of harmful substances in the air collected by each sensing element to comprehensively depict the current air quality data in the room.

[0076] It should be noted that the target concentration range refers to the concentration range set according to industry standards for different harmful substances that cause certain indoor pollution. The lower limit of this range is the standard concentration of harmful gases and / or particles in the indoor space monitored by the air quality sensor module, while the upper limit corresponds to the concentration of harmful substances that cause a certain degree of indoor pollution, that is, other concentration values ​​except severe pollution.

[0077] Specifically, in step 102, the radar-based air conditioning fresh air control device retains the period and amplitude of the first vibration wave obtained in step 101, and delays its phase by half a period, and after obtaining a second vibration wave with a waveform opposite to that of the first vibration wave, controls the vibration generator to emit a vibration wave with the second vibration wave to continuously eliminate the vibration of the radar module.

[0078] While the vibration generator is continuously eliminating vibrations from the radar module, the radar-based air conditioning fresh air control device compares the current air quality data with the corresponding target concentration range:

[0079] If the current air quality data is within the target concentration range, it means that the current indoor air is polluted but not to the extent of severe pollution. Then it is necessary to drive the vibration-damped radar module to collect the position information of key human parts of each individual in the space where the air conditioner is located in real time, and perform coordinate system conversion and standardization operations on the relative positions of the human body parts of each individual accordingly, connect them in order of joints to obtain the posture of the human body, and output it as posture feature data.

[0080] If the current air quality data is less than the lower limit of the target concentration range, it means that the current indoor air is not polluted and there is no need to turn on the fresh air system.

[0081] If the current air quality data is greater than the upper limit of the target concentration range, it means that the current indoor pollution is quite serious, and there is no need to directly turn on the fresh air system based on human posture recognition.

[0082] The embodiment of the present invention does not specifically limit the type and quantity of radar sensing devices in the radar module.

[0083] Exemplarily, the radar module may include a laser radar, an infrared sensor, etc.

[0084] Optionally, since the horizontal detection range of the millimeter-wave radar can reach ±75°, the vertical detection range can reach ±40°, the maximum detection distance can reach 8 meters, the distance output accuracy can reach 0.1 meters, the angle output accuracy can reach 1°, and it does not involve privacy issues, is not affected by light, and its response speed is also faster.

[0085] Therefore, the radar-based air conditioning fresh air control device analyzes the user's individual posture in the spatial coordinate system according to the coordinates of the human body's key points in the radar coordinate system collected in real time by the millimeter-wave radar.

[0086] Exemplarily, the radar module may include multiple sensor elements such as millimeter wave radar, lidar, infrared sensor, etc. The radar-based air conditioning fresh air control device integrates the information of key parts of the human body collected by each radar element to comprehensively portray the individual's real-time posture.

[0087] For example, millimeter-wave radar can be used to collect the coordinates of key human body parts of an individual in the radar coordinate system, and the mapping relationship between the shapes of multiple human body parts connected at the same time and human body movements can be fitted based on a large amount of prior data to directly obtain the corresponding posture feature data of the individual.

[0088] Step 103: When it is determined that the posture feature data of at least one individual meets the target condition, the fresh air system of the fresh air air conditioner is turned on.

[0089] The target condition is determined based on posture characteristics corresponding to actions exhibited by an individual when the individual is in an environment where the air quality is below the standard.

[0090] It should be noted that the target condition refers to the posture feature data set based on the specific actions actively performed by individuals indoors to avoid excessive exposure to a polluted environment when a certain harmful substance causes a certain degree of pollution indoors.

[0091] The target condition is used to determine whether the user's current posture is consistent with the natural physical reaction of a human individual to the invasion of a certain harmful substance, or is a specific action taken to deal with the invasion of a certain harmful substance.

[0092] Specifically, in step 103, the radar-based air conditioning fresh air control device compares the posture feature data collected by the radar module after vibration elimination for each individual with the target conditions corresponding to various harmful substances:

[0093] If the connectivity relationship of key parts of the human body carried in the posture feature data of at least one individual satisfies the threshold set for the relevant connectivity relationship in the specific action corresponding to the target condition, it means that at least one individual perceives the pollution of indoor air by harmful substances corresponding to the target condition before other individuals. In this case, it is necessary to control the fresh air air conditioner to turn on the fresh air system only when the air quality sensor module detects that the indoor air quality is poor and determines that the radar module monitors that the posture displayed by the human individual is consistent with the physiological response presented in a gas-polluted environment, so as to improve the air quality by supplementing fresh air.

[0094] If the connectivity relationships of key parts of the human body carried in the posture feature data of all individuals do not meet the thresholds set for the relevant connectivity relationships in the specific actions corresponding to the target conditions, it is necessary to turn on the fresh air when the air quality sensor module detects that the indoor air quality is poor, but the radar module is determined not to have monitored the expected physiological reactions of human individuals. At the same time, further judgment should be made based on the specific circumstances of this behavior by the individual, which serves as a theoretical basis for subsequent processing measures.

[0095] Optionally, the radar module can be used to monitor the trend of an individual's heartbeat and breathing over time. If the trend indicates that the individual is in a healthy physiological state, it means that the human body has a high tolerance for harmful substances corresponding to the target condition. Even if it has caused slight pollution but does not constitute harm to health, the fresh air system can be turned on to send an alarm signal to the user that there is pollution in the room.

[0096] Optionally, the radar module can be used to monitor the trend of an individual's heartbeat and breathing over time. If the trend indicates that the individual is in an unhealthy physiological state, the human body has a low tolerance for harmful substances corresponding to the target condition. Even slight pollution can cause harm to the human body in a short period of time, causing all individuals in the room to faint or fall to the ground. While turning on the fresh air system to remedy the environment, it can also send an alarm signal to the rescue agency that the life of the individual indoors is in danger.

[0097] In the embodiment of the present invention, a vibration generator emits a second vibration wave opposite to the actual first vibration wave to dampen the vibration propagated by the indoor unit of the air conditioner, and when it is determined that the current air quality data indicates that there is a certain degree of pollution in the room, and the individual posture monitored by the radar module in the damping state conforms to the natural physiological reaction of the human body in a polluted environment, a decision is made to turn on the fresh air system. The vibration waves emitted by the vibration transmitter and the vibration waves generated by the air conditioner itself during operation can be superimposed and damped, so that stable imaging can be achieved during air conditioner radar observation, and the opening of the fresh air system can be intercepted and judged based on the threshold comparison according to the air quality, and the individual posture monitored by the damping radar can be referenced. The behavioral intention corresponding to the user's posture can bring certain reliability and intelligence to the control accuracy of the fresh air system, taking into account both the energy efficiency of the equipment and the user experience.

[0098] On the basis of any of the above embodiments, after turning on the fresh air system of the fresh air air conditioner, it also includes: determining an acceleration change curve based on individual position information collected by the radar module within a preset period after the second vibration wave is damped.

[0099] Among them, the radar module after the vibration is eliminated by the second vibration wave uses the second vibration wave that has a phase difference of half a cycle with the first vibration wave to offset the vibration of the radar module caused by the first vibration wave under the propagation of the air-conditioning indoor unit.

[0100] It should be noted that Figure 2 FIG. 1 is a schematic diagram of the principle of vibration elimination of the radar module provided by the present invention. Figure 2 As shown, taking the first vibration wave as a sine wave and the second vibration wave as a cosine wave as an example, an implementation process of using the second vibration wave to eliminate vibration of the radar module is given:

[0101] During the operation of the indoor unit of the air conditioner, the vibration waveform is similar to the resonant wave, but the amplitude of each cycle is different and there is a slight difference. Therefore, the first vibration wave (sin(·)) can be fitted by collecting vibration signals of multiple vibration cycles. Since the second vibration wave has a phase difference of half a cycle with the first vibration wave, its waveform is completely opposite to the first vibration wave, that is, (cos(·)). At any time point, the sum of the vibration amplitude value cos(x) corresponding to the second vibration wave and the vibration amplitude value sin(x) corresponding to the first vibration wave is 0, so the vibration of the indoor unit of the air conditioner can be offset.

[0102] Specifically, in step 102, the radar-based air conditioning fresh air control device receives the real-time position information of each individual in the indoor space collected by the radar module after vibration elimination, and analyzes the displacement trajectory corresponding to the individual position information collected for any individual within a preset period, and integrates the rate of change of speed over time corresponding to the displacement of the individual within the period into an acceleration change curve of the corresponding individual.

[0103] Among them, the acceleration change curve is used to indicate how fast the speed of an individual changes during a period, which serves as the basis for quantifying the individual's degree of exercise.

[0104] When it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0, the movement degree of each individual is determined based on the change trend of the acceleration change curve in the time domain.

[0105] Specifically, the radar-based air conditioning fresh air control device analyzes the acceleration change trend presented by the acceleration change curve of each individual:

[0106] If the acceleration corresponding to each time point in the acceleration change curve is not 0, it means that the individual moves at a variable speed within the period. Then it is necessary to analyze the change trend of the acceleration in the acceleration change curve. When the acceleration changes in the time domain, the maximum acceleration value in the time interval with the longest horizontal axis span can be represented as the movement degree of the corresponding individual.

[0107] In addition, when the acceleration changes in the frequency domain, the frequency of change with the most obvious span in the vertical axis can be represented as the degree of movement of the corresponding individual.

[0108] If the acceleration corresponding to each time point in the acceleration change curve is 0, it means that the individual is moving at a constant speed or is stationary within the cycle. In this case, it is necessary to further judge its activity state based on the individual's instantaneous speed within the cycle.

[0109] Based on the exercise levels of all individuals, a target fresh air speed value is determined so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0110] It should be noted that before adjusting the fresh air speed, it is necessary to pre-set a mapping relationship between the degree of exercise and the rotation speed value of the fresh air fan, which is not specifically limited in the embodiment of the present invention.

[0111] Among them, the greater the individual's exercise level, the more intense the exercise, and the greater the consumption of indoor oxygen, so the speed value of the fresh air fan that matches it will be correspondingly larger.

[0112] Specifically, if the radar-based air-conditioning fresh air control device senses that there is only one individual in the space, it can directly compare the individual's movement level with the pre-set mapping relationship between the movement level and the speed value of the fresh air fan, and use the obtained speed value of the fresh air fan that matches the individual's movement level as the target fresh air speed value.

[0113] Alternatively, if it is sensed that there are multiple individuals in the space, a statistical analysis can be performed on the exercise levels of all individuals. For example, the mean, mode, median, etc. of the exercise levels of multiple individuals can be taken, and compared with a pre-set mapping relationship between the exercise level and the speed value of the fresh air fan, and the speed value of the fresh air fan that matches the statistically obtained exercise level can be used as the target fresh air speed value.

[0114] Next, the radar-based air conditioning fresh air control device encapsulates the target fresh air speed value into the fresh air control instruction and sends it to the relevant components of the fresh air system. So that the fresh air system adjusts the actual value of the fresh air speed of the fresh air fan in the default operation mode to the target fresh air speed value under the control of the corresponding instruction, and the fresh air supplement amount changes accordingly with the adjustment of the speed of the fresh air fan.

[0115] After the fresh air system is turned on, the embodiment of the present invention uses the radar module after vibration elimination to fit and update the acceleration change curve when the position of the individual changes. When the acceleration change curve indicates the individual's variable speed movement, the decision is made to use the change trend of the acceleration in the time domain in the acceleration change curve to characterize the individual's movement degree, so as to adjust the fan speed of the fresh air system to a target value that matches the individual's movement degree. The analysis of the movement degree is carried out according to the acceleration change of the individual within the cycle, and the fan speed of the fresh air system is adaptively adjusted, so that the individual does not have to manually set the fresh air operation mode when exercising. The fresh air control can be adaptively performed according to the movement state on the principle of ensuring that the fresh air supplement amount matches the individual's movement amount, thereby improving the control accuracy and efficiency of the fresh air system and taking into account the user's fresh air experience and exercise experience.

[0116] On the basis of any of the above embodiments, when it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, the movement degree of each individual is determined based on the change trend of the acceleration change curve in the time domain, including: when it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain is respectively used as the time domain span value corresponding to each acceleration interval.

[0117] The acceleration interval is a plurality of sub-intervals divided according to the absolute value of the acceleration, and each sub-interval is preset with a fresh air gear; the fresh air gear is positively correlated with the lower limit value of the acceleration interval.

[0118] It should be noted that the horizontal axis of the acceleration change curve is set to time (unit: second, its value range is [0, +∞)), and the vertical axis is set to acceleration (unit: meter per second squared, its value range is [-∞, +∞)) to show its change trend.

[0119] Furthermore, it is necessary to divide the acceleration of the vertical axis into at least two continuous value intervals so as to characterize different degrees of movement through different speed change rates.

[0120] Exemplarily, according to the four pre-set fresh air gears with different fresh air fan speeds in the fresh air system, namely, low-speed fresh air gear, medium-speed fresh air gear, high-speed fresh air gear and strong fresh air gear, the absolute value of acceleration in the vertical coordinate axis is divided into four acceleration intervals, namely, [0, A), [A, B), [B, C) and [C, +∞).

[0121] As the fan speeds of the four fresh air gears increase, the lower limits of the four acceleration intervals 0, A, B and C can increase in sequence according to the corresponding geometric or arithmetic differences. For example, A can be set to 0.5 m / s 2 , B can be set to 1.5m / s 2 , C can be taken as 2.5m / s 2 .

[0122] Specifically, the radar-based air conditioning fresh air control device determines the acceleration trend through the acceleration change curve, accumulates and sums the duration of each acceleration interval in turn, and outputs the accumulated duration of each acceleration interval as the corresponding time domain span value.

[0123] The individual's degree of exercise is determined based on the acceleration interval corresponding to the maximum time domain span value.

[0124] Specifically, after the radar-based air-conditioning fresh air control device filters out the maximum time domain span value from the time domain span values ​​of all acceleration intervals on the horizontal axis, the acceleration interval corresponding to the maximum time domain span value can be directly output as the individual's exercise level, so as to map the fresh air level that needs to be adjusted in subsequent steps through the correspondence between the acceleration interval and the fresh air level.

[0125] Optionally, an artificial intelligence model can be trained with a large amount of sample data to quantify the individual's degree of movement by applying the model to the acceleration range corresponding to the maximum time domain span value and the motion trajectory within the cycle. The value of the degree of movement can be any percentage between 0 and 1, so that in subsequent steps, the linear relationship between the degree of movement and the speed value of the fresh air fan can be used to map the fresh air fan speed value that needs to be adjusted.

[0126] When determining that the acceleration change curve indicates individual variable speed movement, the embodiment of the present invention makes a decision to calculate the time domain span distribution of each acceleration interval within the cycle of the acceleration change curve, and quantify the individual's movement degree using the acceleration interval corresponding to the maximum time domain span value, so that the fan speed of the fresh air system can be adjusted to a target value that matches the individual's movement degree. When performing time domain analysis on the trend of acceleration changes over time, it has higher time precision and accuracy, and is easier to capture the change in the degree of movement, thereby improving the control precision of the fresh air system.

[0127] On the basis of any of the above embodiments, after determining the acceleration change curve, the method further includes: if it is determined that at least one individual has an acceleration change curve in which the acceleration corresponding to each time point is 0 and the individual speed is continuously 0, adjusting the fan speed of the fresh air system to the rated minimum value

[0128] If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of each individual is not 0, the target fresh air speed value is determined based on the speed corresponding to the uniform motion of all individuals within the preset period, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0129] Specifically, when the radar-based air conditioning fresh air control device analyzes the acceleration change trend presented by the acceleration change curve of each individual and finds that the individual is not moving at a variable speed, it is necessary to make further judgments based on the individual's instantaneous speed:

[0130] If the acceleration corresponding to each time point in the acceleration change curve of at least one individual is 0, and the instantaneous speed of the individual within the cycle continues to be 0, which means that the individual is stationary within the cycle, then it is determined that the individual has a tendency to sleep, or the individual belongs to a vulnerable group such as infants, young children, and the elderly. Since they have little demand for fresh air supplement when they are not active, the fan speed of the fresh air system can be directly adjusted to the rated minimum value based on the principle of taking care of vulnerable groups.

[0131] If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of the individuals within the period is not 0, it means that all individuals in the indoor space are moving at a uniform speed at the corresponding instantaneous speed and are in different degrees of motion. It is then determined that the activity level of the indoor individuals is relatively fixed, and their demand for fresh air replenishment is determined by the speed of the uniform motion of the individuals. When all indoor individuals move at the same speed, the fresh air speed value corresponding to the speed can be mapped out according to the corresponding relationship between the speed and the fan speed of the fresh air system, and used as the target value to guide the fresh air system to adjust the fan speed.

[0132] It can be understood that when each individual in the room performs uniform motion at different degrees at their own speed, the uniform motion speed of all individuals can be statistically analyzed first, and the fresh air speed value corresponding to the statistical mean, median or mode speed can be mapped through the corresponding relationship between the speed and the fan speed of the fresh air system, and it can be used as the target value to guide the fresh air system to adjust the fan speed.

[0133] When the embodiment of the present invention determines that the acceleration change curve indicates that the individual is not moving at a variable speed, the decision is made based on the instantaneous speed of each individual to further distinguish whether the individual is in a stationary state or a uniform motion state, and the fan speed of the fresh air system is adaptively adjusted based on the individual intention tendencies in different states. This can improve the control accuracy and efficiency of the fresh air system on the basis of taking into account individual differences and group needs, while taking into account the user's fresh air experience and sports experience.

[0134] Based on any of the above embodiments, the posture feature data includes body feature data or facial feature data.

[0135] The target condition is determined based on body feature data of an individual when the individual nods frequently or covers the mouth continuously within a preset time period, or facial feature data of an individual when the individual yawns or blinks frequently within a preset time period.

[0136] Specifically, the posture feature data analyzed in the radar-based air conditioning fresh air control device may be body feature data or facial feature data, wherein:

[0137] Body feature data usually relies on landmarks such as the joints in the head and torso to determine the state and movement of the limbs. The corresponding target condition can be based on the head movement characteristics of the individual when nodding frequently within a preset time, to indicate that the user is sleepy when the indoor oxygen content is low. Or, the hand movement data when covering the mouth continuously, to indicate that the user covers the mouth and nose to resist gas invasion when there is a peculiar smell or irritating and harmful gas in the room.

[0138] Facial feature data usually relies on landmarks such as the nostrils, corners of the eyes, lips, dimples, etc. to determine facial expressions and movements. The corresponding target conditions can be based on the mouth movement characteristics of an individual yawning within a preset duration or the eye movement data when blinking frequently, both of which can indicate that the user is drowsy when the indoor oxygen content is low.

[0139] When there is a certain degree of pollution indoors, the embodiment of the present invention identifies body feature data or facial feature data through the perception information of the radar module after vibration elimination, and decides to turn on the fresh air system when it meets the natural physiological reaction of the human body in a polluted environment. It can refer to the behavioral intention corresponding to the user's body or facial expression, bring a certain degree of reliability and intelligence to the control accuracy of the fresh air system, and take into account both equipment energy efficiency and user experience.

[0140] Based on any of the above embodiments, the posture feature data includes body feature data and facial feature data.

[0141] The target condition is determined based on the body feature data and facial feature data of the individual when the individual covers his mouth or yawns continuously within a preset time period.

[0142] Specifically, the posture feature data analyzed in the radar-based air-conditioning fresh air control device can be body feature data and facial feature data, and then the hand movement data in the body feature data and the mouth movement features and eye movement data in the facial feature data can be used to characterize the actions of individual users who feel sleepy when the indoor oxygen content is low, such as yawning, closing eyes, blinking, stretching, etc., by covering their mouths with their hands.

[0143] When there is a certain degree of pollution indoors, the embodiment of the present invention identifies body feature data and facial feature data through the perception information of the radar module after vibration elimination, and decides to turn on the fresh air system when it meets the natural physiological reaction of the human body in a polluted environment. It can refer to the behavioral intention corresponding to the user's body and facial expression, bringing certain reliability and intelligence to the control accuracy of the fresh air system, taking into account both equipment energy efficiency and user experience.

[0144] Based on any of the above embodiments, the first vibration wave is determined based on the vibration sampling signal collected by the vibration sensor from the air conditioner indoor unit, including: obtaining an average sampling period according to multiple vibration periods contained in the vibration sampling signal, and obtaining an average sampling amplitude according to the vibration amplitude corresponding to the target sampling point in each vibration period.

[0145] The target sampling point is a peak sampling point and / or a trough sampling point within the sampling period.

[0146] Specifically, in step 101, the radar-based air conditioning fresh air control device averages the vibration sampling signal that periodically fluctuates at a specific target sampling point within the sampling period to obtain an average sampling period and an average sampling amplitude that can characterize the overall vibration level. The calculation formula is as follows:

[0147]

[0148]

[0149] Where T is the average sampling period, A is the average sampling amplitude. n is the number of vibration periods contained in the sampling period, T i is the i-th vibration cycle in the sampling period. For any vibration cycle, if the target sampling point is the peak sampling point and the trough sampling point in the vibration cycle, then in the i-th vibration cycle, A j It can be the peak amplitude value corresponding to the peak sampling point in the vibration cycle, in which case j = 2i-1. j It can be the amplitude valley value corresponding to the valley sampling point in the vibration period, and in this case j=2i.

[0150] The first vibration wave is generated based on the average sampling period and the average sampling amplitude.

[0151] Specifically, the radar-based air conditioning fresh air control device uses the average sampling period T and the average sampling amplitude A as the new period and amplitude, respectively, to reconstruct the first vibration wave after stabilizing the vibration condition of the indoor unit.

[0152] The embodiment of the present invention averages multiple vibration cycles contained in the vibration sampling signal and the vibration amplitude that fluctuates at the target sampling point within each vibration cycle, and reconstructs the first vibration wave used to characterize the stable vibration level using the obtained average sampling cycle and average sampling amplitude. It can stabilize the vibration waves emitted by the air conditioner itself during operation, provide a reasonable reference value for subsequent superposition and vibration elimination, and greatly improve the perception accuracy of the air conditioner radar.

[0153] Based on any of the above embodiments, if the target sampling point is a sampling point other than the peak sampling point and the trough sampling point in the vibration period, the value of the target sampling point in the time domain includes and

[0154] Here, k is a positive integer greater than 2.

[0155] Specifically, if the target sampling point is any sampling point other than the peak sampling point and the trough sampling point within the vibration period That is, in any vibration cycle, There are 3 more sampling points with the same absolute value of the amplitude of the sampling point, namely and but.

[0156]

[0157] in, For sampling point The average sampling amplitude at are respectively the mth vibration period and The amplitude corresponding to the sampling point with the same absolute value of the amplitude of the sampling point.

[0158] Then, the radar-based air conditioning fresh air control device uses other sampling points based on the average sampling amplitude A obtained by averaging the peak and trough values. The average sampling amplitude obtained by averaging To reconstruct the first vibration wave.

[0159] For example, Figure 3 This is the second flow chart of the radar-based air conditioning fresh air control method provided by the present invention. Figure 3 As shown, the embodiment of the present invention provides a specific implementation of a radar-based air conditioning fresh air control method:

[0160] (1) After the air conditioner is activated, the vibration sensor is used to sample the vibration of the indoor unit to obtain a first vibration wave.

[0161] (2) The vibration generator is controlled to output a second vibration wave to dampen the vibration transmitted to the radar module, and the radar after dampening is continued to collect human body signals in the room. If no one is present, the fresh air system is turned off. If someone is present, further judgment is made based on the CO2 concentration data.

[0162] (4) If the CO2 concentration data is within the target range, the facial expression of the human body is captured through the radar module after vibration cancellation.

[0163] (5) If the facial expression of a person meets the target conditions, for example, a person opens his mouth and then covers his mouth with his hand for more than 1.5 seconds, or a person opens his mouth for more than 2 seconds, if any of the conditions is met, it is considered that the indoor CO2 concentration is high, causing the person to feel sleepy or yawn, and the fresh air system is turned on.

[0164] (5) Continue to capture the real-time displacement trajectory of the individual through the radar module after vibration cancellation, and extract the acceleration change curve of the internal acceleration a of each preset period over time, where:

[0165]

[0166] Among them, the independent variable of the displacement change curve is time t, and the dependent variable S(t) describes the value of displacement at different times. v0 is the instantaneous velocity when t is 0, that is, the instantaneous velocity corresponding to the initial time of this cycle. a is the acceleration.

[0167] The first-order derivative of displacement with respect to time is obtained through the displacement change curve, which is the rate of change of displacement with time. Its physical meaning is speed. The second-order derivative with respect to time is the rate of change of displacement with time, which is the rate of change of velocity with time. Its physical meaning is acceleration. Its expression is as follows:

[0168] S″(t)=(S′(t))′=(v(t))′

[0169] =(v0+at)′=a(t)

[0170] Among them, the independent variable of the acceleration change curve is time t, and the dependent variable a(t) describes the value of acceleration a at different times.

[0171] (6) The acceleration value is divided into four acceleration intervals in advance:

[0172] Area 1, a∈(-A,+A);

[0173] Area 2, a∈(-B,-A]∪[+A,+B);

[0174] Region 3, a∈(-C,-B]∪[+B,+C);

[0175] Region 4, a∈(-∞,-C]∪[+C,+∞);

[0176] (7) According to the acceleration change curve, the time domain spanned by the acceleration in different acceleration intervals within 10 minutes is statistically calculated, that is, T1 is the time domain span value corresponding to zone 1, and so on. T2, T3 and T4 are the time domain span values ​​corresponding to zones 2, 3 and 4 respectively. T1, T2, T3 and T4 are sorted in order and the maximum time domain span value T is selected.

[0177] (8) If T is the time domain span value T1 corresponding to zone 1, the fresh air is turned on at level 1;

[0178] If T is the time domain span value T2 corresponding to zone 2, the fresh air is turned on at level 2;

[0179] If T is the time domain span value T3 corresponding to zone 3, the fresh air is turned on at level 3;

[0180] If T is the time domain span value T4 corresponding to zone 4, the fresh air is turned on at level 4.

[0181] In the embodiment of the present invention, based on the average sampling amplitude obtained by averaging the peaks and valleys, the average sampling amplitude obtained by averaging other sampling points is also used to reconstruct the first vibration wave. This can eliminate the interference of extreme values ​​in the process of stabilizing the vibration waves emitted by the air conditioner itself during operation, thereby improving the linear fitting accuracy.

[0182] Figure 4FIG. 1 is a schematic diagram of the structure of the radar-based air conditioning fresh air control device provided by the present invention. Figure 4 As shown, the radar-based air conditioning fresh air control device provided in the embodiment of the present invention includes a radar stabilization module 410, a gas monitoring module 420 and a fresh air control module 430, wherein:

[0183] The radar stabilization module 410 is used to determine the first vibration wave based on the vibration sampling signal collected by the vibration sensor from the indoor unit of the air conditioner.

[0184] The gas monitoring module 420 is used to obtain the posture feature data of all individuals through the radar module when it is determined that the current air quality data is within the target concentration range during the process of controlling the vibration generator to output the second vibration wave.

[0185] The fresh air control module 430 is used to start the fresh air system of the fresh air air conditioner when it is determined that the posture feature data of at least one individual meets the target condition.

[0186] Among them, the lower limit value of the target concentration range is determined according to the standard concentration of indoor harmful gases and / or particulates; the target condition is determined according to the posture characteristics corresponding to the actions exhibited by an individual when the air quality is below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

[0187] Specifically, the radar stabilization module 410, the gas monitoring module 420 and the fresh air control module 430 are electrically connected in sequence.

[0188] After receiving and responding to the activation instruction, the radar stabilization module 410 controls the fan of the air-conditioning indoor unit to run at the speed in this mode, and controls the compressor of the air-conditioning outdoor unit to run at the power in this mode.

[0189] Since the operation of the fan will cause its own vibration to propagate to the air-conditioning indoor unit and its internal components, the radar stabilization module 410 periodically senses the vibration of the air-conditioning indoor unit through a vibration sensor, and fits a first vibration wave used to characterize the degree of vibration of the air conditioner based on the vibration sampling signal collected within a sampling period.

[0190] The gas monitoring module 420 retains the period and amplitude of the first vibration wave obtained by the radar stabilization module 410, and delays its phase by half a period, and after obtaining a second vibration wave with a waveform opposite to the first vibration wave, controls the vibration generator to emit the second vibration wave to continuously eliminate the vibration of the radar module.

[0191] While the vibration generator is continuously eliminating vibrations from the radar module, the radar-based air conditioning fresh air control device compares the current air quality data with the corresponding target concentration range:

[0192] If the current air quality data is within the target concentration range, it means that the current indoor air is polluted but not to the extent of severe pollution. Then it is necessary to drive the vibration-damped radar module to collect the position information of key human parts of each individual in the space where the air conditioner is located in real time, and perform coordinate system conversion and standardization operations on the relative positions of the human body parts of each individual accordingly, connect them in order of joints to obtain the posture of the human body, and output it as posture feature data.

[0193] The fresh air control module 430 compares the posture feature data of each individual with the target conditions corresponding to various harmful substances:

[0194] If the connectivity relationship of key parts of the human body carried in the posture feature data of at least one individual satisfies the threshold set for the relevant connectivity relationship in the specific action corresponding to the target condition, it means that at least one individual perceives the pollution of indoor air by harmful substances corresponding to the target condition before other individuals. In this case, it is necessary to control the fresh air air conditioner to turn on the fresh air system only when the air quality sensor module detects that the indoor air quality is poor and determines that the radar module monitors that the posture displayed by the human individual is consistent with the physiological response presented in a gas-polluted environment, so as to improve the air quality by supplementing fresh air.

[0195] If the connectivity relationships of key parts of the human body carried in the posture feature data of all individuals do not meet the thresholds set for the relevant connectivity relationships in the specific actions corresponding to the target conditions, it is necessary to turn on the fresh air when the air quality sensor module detects that the indoor air quality is poor, but the radar module is determined not to have monitored the expected physiological reactions of human individuals. At the same time, further judgment should be made based on the specific circumstances of this behavior by the individual, which serves as a theoretical basis for subsequent processing measures.

[0196] Optionally, the device further includes an acceleration analysis module, a motion degree analysis module and a first fresh air adjustment module, wherein:

[0197] The acceleration analysis module is used to determine the acceleration change curve based on the individual position information collected by the radar module within a preset period after the second vibration wave is eliminated.

[0198] The motion degree analysis module is used to determine the motion degree of each individual based on the change trend of the acceleration change curve in the time domain when it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not 0.

[0199] The first fresh air adjustment module is used to determine a target fresh air speed value based on the exercise levels of all individuals, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0200] Among them, the radar module after the vibration is eliminated by the second vibration wave uses the second vibration wave that has a phase difference of half a cycle with the first vibration wave to offset the vibration of the radar module caused by the first vibration wave under the propagation of the air-conditioning indoor unit.

[0201] Optionally, the motion degree parsing module includes a time domain analysis unit and a motion degree parsing unit, wherein:

[0202] The time domain analysis unit is used to determine that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, and then use the cumulative duration of each acceleration interval in the acceleration change curve in the time domain as the time domain span value corresponding to each acceleration interval.

[0203] The exercise degree analysis unit is used to determine the exercise degree of the individual based on the acceleration interval corresponding to the maximum time domain span value.

[0204] The acceleration interval is a plurality of sub-intervals divided according to the absolute value of the acceleration, and each sub-interval is preset with a fresh air gear; the fresh air gear is positively correlated with the lower limit value of the acceleration interval.

[0205] Optionally, the device further includes a second fresh air conditioning module and a third fresh air conditioning module, wherein:

[0206] The second fresh air adjustment module is used to adjust the fan speed of the fresh air system to the rated minimum value if it is determined that the acceleration corresponding to each time point in the acceleration change curve of at least one individual is 0 and the individual speed is continuously 0.

[0207] The third fresh air adjustment module is used to determine the target fresh air speed value based on the speed corresponding to the uniform motion of all individuals within a preset period if the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of each individual is not 0, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

[0208] Optionally, the posture feature data includes body feature data or facial feature data;

[0209] The target condition is determined based on body feature data of an individual when the individual nods frequently or covers the mouth continuously within a preset time period, or facial feature data of an individual when the individual yawns or blinks frequently within a preset time period.

[0210] Optionally, the posture feature data includes body feature data and facial feature data;

[0211] The target condition is determined based on the body feature data and facial feature data of the individual when the individual covers his mouth or yawns continuously within a preset time period.

[0212] Optionally, the radar stabilization module 410 includes a stabilization calculation unit and a linear fitting unit, wherein:

[0213] The stability maintenance calculation unit is used to obtain an average sampling period according to a plurality of vibration periods included in the vibration sampling signal, and to obtain an average sampling amplitude according to the vibration amplitude corresponding to the target sampling point in each vibration period.

[0214] A linear fitting unit is used to generate the first vibration wave based on the average sampling period and the average sampling amplitude.

[0215] The target sampling points include peak sampling points and trough sampling points within the sampling period.

[0216] Optionally, if the target sampling point is a sampling point other than the peak sampling point and the trough sampling point in the vibration period, the value of the target sampling point in the time domain includes: and

[0217] Here, k is a positive integer greater than 2.

[0218] The radar-based air conditioning fresh air control device provided in an embodiment of the present invention is used to execute the above-mentioned radar-based air conditioning fresh air control method of the present invention. Its implementation method is consistent with the implementation method of the radar-based air conditioning fresh air control method provided by the present invention, and can achieve the same beneficial effects, which will not be repeated here.

[0219] In the embodiment of the present invention, a vibration generator emits a second vibration wave opposite to the actual first vibration wave to dampen the vibration propagated by the indoor unit of the air conditioner, and when it is determined that the current air quality data indicates that there is a certain degree of pollution in the room, and the individual posture monitored by the radar module in the damping state conforms to the natural physiological reaction of the human body in a polluted environment, a decision is made to turn on the fresh air system. The vibration waves emitted by the vibration transmitter and the vibration waves generated by the air conditioner itself during operation can be superimposed and damped, so that stable imaging can be achieved during air conditioner radar observation, and the opening of the fresh air system can be intercepted and judged based on the threshold comparison according to the air quality, and the individual posture monitored by the damping radar can be referenced. The behavioral intention corresponding to the user's posture can bring certain reliability and intelligence to the control accuracy of the fresh air system, taking into account both the energy efficiency of the equipment and the user experience.

[0220] Figure 5 FIG. 1 is a schematic diagram of the structure of the fresh air air conditioner provided by the present invention. Figure 5 As shown, the fresh air air conditioner provided by the embodiment of the present invention includes an air conditioner indoor unit 510 , an air conditioner outdoor unit 520 and a fresh air system 530 .

[0221] The air-conditioning indoor unit 510 includes an air-conditioning controller 511 and a vibration reduction device 512 that are communicatively connected, and also includes a memory and a program or instruction stored in the memory and executable on the air-conditioning controller 511. When the program or instruction is executed by the air-conditioning controller 511, a radar-based air-conditioning fresh air control method as described in any of the above items is executed.

[0222] The vibration elimination device 512 includes a radar module 512 - 1 , a vibration generator 512 - 2 and a vibration sensor 512 - 3 which are respectively connected to the air conditioning controller 511 for communication.

[0223] The vibration sensor 513 is used to sense the vibration of the air conditioner indoor unit 510. The vibration generator 512-2 is used to eliminate the vibration of the radar module 512-1 driven by the air conditioner indoor unit 510.

[0224] Among them, the radar module 512-1 is a millimeter wave radar.

[0225] Specifically, the fresh air air conditioner is provided with an indoor unit 510, an outdoor unit 520 and a fresh air system 530. The indoor unit 510 and the outdoor unit 520 are connected by a refrigerant pipeline, and the fresh air system 530 independently uses an air duct for circulating fresh air.

[0226] The air conditioner indoor unit 510 is provided with an air conditioner controller 511 and a vibration elimination device 512 which are in communication connection. The air conditioner controller 511 is integrated in the control chip of the air conditioner system. When the air conditioner control method based on the swimming pool is executed, the vibration elimination device 512 is controlled to offset the vibration caused by the operation of the air conditioner indoor unit 510, and then the human body is sensed in the indoor space. The process is as follows:

[0227] The vibration elimination device 512 is composed of a radar module 512-1, a vibration generator 512-2 and a vibration sensor 512-3 which are arranged independently of each other. When the air conditioner indoor unit 510 is activated, the vibration generated by the fan itself will be transmitted to the air conditioner indoor unit 510 and its internal components due to the operation of the fan. Therefore, the air conditioner controller 511 periodically senses the vibration generated by the air conditioner indoor unit 510 through the vibration sensor 512-3, and fits the first vibration wave used to characterize the vibration degree of the air conditioner according to the vibration sampling signal collected within a sampling period.

[0228] The air conditioning controller 511 retains the period and amplitude of the first vibration wave, and delays its phase by half a period, and after obtaining a second vibration wave with a waveform opposite to the first vibration wave, controls the vibration generator 512-2 to emit the second vibration wave to continuously eliminate the vibration of the radar module 512-1.

[0229] While the vibration generator 512-2 is continuously silencing the radar module 512-1, the air conditioning controller 511 compares the current air quality data with the corresponding target concentration range:

[0230] If the current air quality data is within the target concentration range, it means that the current indoor air is polluted but not to the extent of severe pollution. Then it is necessary to drive the vibration-damped radar module to collect the position information of key human parts of each individual in the space where the air conditioner is located in real time, and perform coordinate system conversion and standardization operations on the relative positions of the human body parts of each individual accordingly, connect them in order of joints to obtain the posture of the human body, and output it as posture feature data.

[0231] If the current air quality data is less than the lower limit of the target concentration range, it means that the current indoor air is not polluted and there is no need to turn on the fresh air system.

[0232] If the current air quality data is greater than the upper limit of the target concentration range, it means that the current indoor pollution is quite serious, and there is no need to directly turn on the fresh air system based on human posture recognition.

[0233] Next, the air conditioning controller 511 compares the posture feature data collected by the radar module after vibration elimination for each individual with the target conditions corresponding to various harmful substances:

[0234] If the connectivity relationship of key parts of the human body carried in the posture feature data of at least one individual satisfies the threshold set for the relevant connectivity relationship in the specific action corresponding to the target condition, it means that at least one individual perceives the pollution of indoor air by harmful substances corresponding to the target condition before other individuals. In this case, it is necessary to control the fresh air air conditioner to turn on the fresh air system only when the air quality sensor module detects that the indoor air quality is poor and determines that the radar module monitors that the posture displayed by the human individual is consistent with the physiological response presented in a gas-polluted environment, so as to improve the air quality by supplementing fresh air.

[0235] If the connectivity relationships of key parts of the human body carried in the posture feature data of all individuals do not meet the thresholds set for the relevant connectivity relationships in the specific actions corresponding to the target conditions, it is necessary to turn on the fresh air when the air quality sensor module detects that the indoor air quality is poor, but the radar module is determined not to have monitored the expected physiological reactions of human individuals. At the same time, further judgment should be made based on the specific circumstances of this behavior by the individual, which serves as a theoretical basis for subsequent processing measures.

[0236] On the contrary, if there is no target individual whose body feature information does not match the pre-set joint control wake-up posture, or the duration for which the individual maintains the joint control wake-up posture does not reach the preset threshold, it means that the individual's current behavioral intention is only to perform some specific actions in the indoor space, and there is no need to use elderly care assistive devices, so the joint control of the air conditioner and the elderly care assistive devices will not be triggered.

[0237] In the embodiment of the present invention, a vibration generator emits a second vibration wave opposite to the actual first vibration wave to dampen the vibration propagated by the indoor unit of the air conditioner, and when it is determined that the current air quality data indicates that there is a certain degree of pollution in the room, and the individual posture monitored by the radar module in the damping state conforms to the natural physiological reaction of the human body in a polluted environment, a decision is made to turn on the fresh air system. The vibration waves emitted by the vibration transmitter and the vibration waves generated by the air conditioner itself during operation can be superimposed and damped, so that stable imaging can be achieved during air conditioner radar observation, and the opening of the fresh air system can be intercepted and judged based on the threshold comparison according to the air quality, and the individual posture monitored by the damping radar can be referenced. The behavioral intention corresponding to the user's posture can bring certain reliability and intelligence to the control accuracy of the fresh air system, taking into account both the energy efficiency of the equipment and the user experience.

[0238] In addition, the logic instructions in the memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0239] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the radar-based air conditioning fresh air control method provided by the above methods, the method comprising: determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an air conditioning indoor unit; in the process of controlling the vibration generator to output a second vibration wave, if it is determined that the current air quality data is in a target concentration range, obtaining posture feature data of all individuals through a radar module; when it is determined that the posture feature data of at least one individual meets the target condition, turning on the fresh air system of the fresh air air conditioner; wherein the target concentration The lower limit of the interval is determined based on the standard concentration of indoor harmful gases and / or particles; the target condition is determined based on the posture characteristics corresponding to the actions exhibited by an individual when the air quality is below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

[0240] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the radar-based air conditioning fresh air control method provided by the above-mentioned methods, the method comprising: determining a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an air conditioning indoor unit; in the process of controlling the vibration generator to output a second vibration wave, if it is determined that the current air quality data is in a target concentration range, obtaining posture feature data of all individuals through a radar module; when it is determined that the posture feature data of at least one individual meets the target condition, turning on the fresh air system of the fresh air air conditioner; wherein the lower limit value of the target concentration range is based on the indoor harmful gas The target condition is determined according to the posture characteristics corresponding to the actions exhibited by the individual when the air quality is below the standard; the period and amplitude of the first vibration wave and the second vibration wave are the same, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

[0241] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0242] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution 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 can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0243] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radar-based air conditioning fresh air control method, characterized in that: include: Determine a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an indoor unit of the air conditioner; In the process of controlling the vibration generator to output the second vibration wave, if it is determined that the current air quality data is within the target concentration range, the posture feature data of all individuals are obtained through the radar module; When it is determined that the posture feature data of at least one individual meets the target condition, turning on the fresh air system of the fresh air air conditioner; Among them, the lower limit value of the target concentration range is determined according to the standard concentration of indoor harmful gases and / or particulates; the target condition is determined according to the posture characteristics corresponding to the actions exhibited by an individual when the air quality is below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

2. The radar-based air conditioning fresh air control method according to claim 1, characterized in that: After the fresh air system of the fresh air air conditioner is turned on, the method further comprises: Determine an acceleration change curve based on individual position information collected by the radar module within a preset period after the second vibration wave is eliminated; When it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, the movement degree of each individual is determined based on the change trend of the acceleration change curve in the time domain; Based on the exercise levels of all individuals, a target fresh air speed value is determined, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value; Among them, the radar module after the vibration is eliminated by the second vibration wave uses the second vibration wave that has a phase difference of half a cycle with the first vibration wave to offset the vibration of the radar module caused by the first vibration wave under the propagation of the air-conditioning indoor unit.

3. The radar-based air conditioning fresh air control method according to claim 2, characterized in that: In the case where it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, determining the movement degree of each individual based on the change trend of the acceleration change curve in the time domain includes: When it is determined that the acceleration corresponding to each time point in the acceleration change curve of each individual is not zero, the cumulative duration of each acceleration interval in the acceleration change curve in the time domain is respectively used as the time domain span value corresponding to each acceleration interval; Determine the individual's degree of movement based on the acceleration interval corresponding to the maximum time domain span value; The acceleration interval is a plurality of sub-intervals divided according to the absolute value of the acceleration, and each sub-interval is preset with a fresh air gear; the fresh air gear is positively correlated with the lower limit value of the acceleration interval.

4. The radar-based air conditioning fresh air control method according to claim 2, characterized in that: After determining the acceleration change curve, the method further includes: If it is determined that there is at least one individual whose acceleration corresponding to each time point in the acceleration change curve is 0 and the individual speed is continuously 0, the fan speed of the fresh air system is adjusted to the rated minimum value; If the acceleration corresponding to each time point in the acceleration change curve of all individuals is 0, and the instantaneous speed of each individual is not 0, the target fresh air speed value is determined based on the speed corresponding to the uniform motion of all individuals within the preset period, so that the air conditioner can adjust the fan speed of the fresh air system to the target fresh air speed value.

5. The radar-based air conditioning fresh air control method according to claim 1, characterized in that: The posture feature data includes body feature data or facial feature data; The target condition is determined based on body feature data of an individual when the individual nods frequently or covers the mouth continuously within a preset time period, or facial feature data of an individual when the individual yawns or blinks frequently within a preset time period.

6. The radar-based air conditioning fresh air control method according to claim 1, characterized in that: The posture feature data includes body feature data and facial feature data; The target condition is determined based on the body feature data and facial feature data of the individual when the individual covers his mouth or yawns continuously within a preset time period.

7. The radar-based air conditioning fresh air control method according to any one of claims 1-6, characterized in that: The method of determining the first vibration wave based on the vibration sampling signal collected by the vibration sensor from the indoor unit of the air conditioner includes: Obtaining an average sampling period according to a plurality of vibration periods included in the vibration sampling signal, and obtaining an average sampling amplitude according to the vibration amplitude corresponding to the target sampling point in each vibration period; generating the first vibration wave based on the average sampling period and the average sampling amplitude; The target sampling points include peak sampling points and trough sampling points within the sampling period.

8. The radar-based air conditioning fresh air control method according to claim 7, characterized in that: If the target sampling point is a sampling point other than the peak sampling point and the trough sampling point in the vibration period, the value of the target sampling point in the time domain includes and Here, k is a positive integer greater than 2.

9. A radar-based air conditioning fresh air control device, characterized in that: include: A radar stabilization module, used to determine a first vibration wave based on a vibration sampling signal collected by a vibration sensor from an indoor unit of the air conditioner; The gas monitoring module is used to obtain the posture characteristic data of all individuals through the radar module when it is determined that the current air quality data is within the target concentration range during the process of controlling the vibration generator to output the second vibration wave; A fresh air control module, for turning on a fresh air system of a fresh air air conditioner when it is determined that the posture feature data of at least one individual meets a target condition; Among them, the lower limit value of the target concentration range is determined according to the standard concentration of indoor harmful gases and / or particulates; the target condition is determined according to the posture characteristics corresponding to the actions exhibited by an individual when the air quality is below the standard; the first vibration wave and the second vibration wave have the same period and amplitude, and the phase of the first vibration wave differs from the phase of the second vibration wave by half a period; the vibration sampling signal is a vibration signal generated by the operation of the fan of the air-conditioning indoor unit during the sampling period; the vibration sensor, the radar module and the vibration generator are all arranged in the air-conditioning indoor unit, the vibration sensor is used to sense the vibration of the air-conditioning indoor unit, and the vibration generator is used to eliminate the vibration of the radar module driven by the air-conditioning indoor unit.

10. A fresh air air conditioner, characterized in that: Including air conditioner indoor unit, air conditioner outdoor unit and fresh air system; The air conditioner indoor unit includes an air conditioner controller and a vibration elimination device that are communicatively connected, and also includes a memory and a program or instruction stored in the memory and executable on the air conditioner controller, wherein the program or instruction is executed by the air conditioner controller to execute the radar-based air conditioner fresh air control method according to any one of claims 1 to 8; The vibration elimination device comprises a radar module, a vibration generator and a vibration sensor which are respectively connected to the air conditioning controller for communication; The vibration sensor is used to sense the vibration of the air conditioner indoor unit; the vibration generator is used to eliminate the vibration of the radar module driven by the air conditioner indoor unit; Wherein, the radar module is a millimeter wave radar.

11. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the radar-based air conditioning fresh air control method as described in any one of claims 1 to 8 is implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the radar-based air conditioning fresh air control method as described in any one of claims 1 to 8 is implemented.

Images