Control method of pyroelectric sensor and pyroelectric sensor

Abstract

The invention discloses a pyroelectric sensor control method and a pyroelectric sensor, and relates to the technical field of pyroelectric sensors, and the pyroelectric sensor control method comprises the steps: obtaining an infrared heat source parameter of a monitoring area, and determining a trigger event occurring in the monitoring area according to the infrared heat source parameter; wherein the trigger event comprises a valid event and an invalid event; under the condition that the trigger event is determined to be the effective event, adjusting the working mode of the camera to be a trigger mode; and when it is determined that the trigger event is an invalid event, adjusting the working mode of the camera to be a standby mode. The invention aims to solve the technical problems that the service life of a battery is greatly shortened and storage resources of the camera are stressed due to the fact that the existing camera is kept in an activated state for a long time.

Description

Technical Field

[0001] The present application relates to the technical field of pyroelectric sensors, and in particular to a control method of a pyroelectric sensor and a pyroelectric sensor. Background Art

[0002] In order to maintain uninterrupted video recording, the camera module, processing unit and wireless transmission components of traditional wireless cameras must remain activated for a long time, which greatly shortens the battery life. And because traditional wireless cameras record videos almost all day long, they will generate a large amount of redundant data, which puts pressure on the camera's storage resources. Summary of the invention

[0003] The main purpose of the present application is to provide a control method for a pyroelectric sensor and a pyroelectric sensor, aiming to solve the technical problem that the existing camera remains activated for a long time, which greatly shortens the service life of the battery and puts pressure on the storage resources of the camera.

[0004] To achieve the above purpose, the present application proposes a control method of a pyroelectric sensor, which is applied to a camera. The control method of the pyroelectric sensor includes:

[0005] Acquire infrared heat source parameters of the monitoring area, and determine trigger events occurring in the monitoring area according to the infrared heat source parameters; wherein the trigger events include valid events and invalid events;

[0006] When determining that the trigger event is a valid event, adjusting the working mode of the camera to a trigger mode;

[0007] When it is determined that the trigger event is an invalid event, the working mode of the camera is adjusted to a standby mode.

[0008] In one embodiment, determining a trigger event occurring in a monitoring area according to the infrared heat source parameter includes:

[0009] In the case where the infrared heat source parameter is greater than a preset parameter threshold, determining that the trigger event occurring in the monitoring area is a valid event;

[0010] When the infrared heat source parameter is less than or equal to the preset parameter threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

[0011] In one embodiment, when the infrared heat source parameter includes the infrared heat source intensity, determining the trigger event occurring in the monitoring area according to the infrared heat source parameter includes:

[0012] When the intensity of the infrared heat source is greater than a preset intensity threshold, determining that the trigger event occurring in the monitoring area is a valid event;

[0013] When the intensity of the infrared heat source is less than or equal to the preset intensity threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

[0014] In one embodiment, when the infrared heat source parameter includes the infrared heat source duration, the method for determining the trigger event occurring in the monitoring area according to the infrared heat source parameter includes:

[0015] When the duration of the infrared heat source is greater than a preset time threshold, determining that the trigger event occurring in the monitoring area is a valid event;

[0016] When the duration of the infrared heat source is less than or equal to the preset time threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

[0017] In one embodiment, when the infrared heat source parameter includes the infrared heat source area, the method for determining the trigger event occurring in the monitoring area according to the infrared heat source parameter includes:

[0018] When the area of ​​the infrared heat source is smaller than the upper preset area threshold and larger than the lower preset area threshold, determining that the trigger event occurring in the monitoring area is a valid event;

[0019] When the area of ​​the infrared heat source is smaller than the lower preset area threshold or larger than the upper preset area threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

[0020] In one embodiment, the control method of the pyroelectric sensor further includes:

[0021] Get the light intensity of the monitored area;

[0022] When the illumination intensity is less than the preset illumination intensity, the preset parameter threshold is adjusted to increase, and when the illumination intensity is greater than or equal to the preset illumination intensity, the preset parameter threshold is adjusted to decrease.

[0023] In one embodiment, when the pyroelectric sensor includes a wireless communication module, the control method of the pyroelectric sensor further includes:

[0024] In the case where the trigger event is determined to be an invalid event, the operating frequency of the wireless communication module is adjusted to be lowered, or the wireless communication module is controlled to switch to a communication protocol with low power consumption characteristics.

[0025] In addition, to achieve the above-mentioned purpose, the present application also proposes a pyroelectric sensor, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the control method of the pyroelectric sensor as described in any one of the above items; and a pyroelectric sensing component, wherein the processor is electrically connected to the camera and the pyroelectric sensing component, respectively.

[0026] In one embodiment, the pyroelectric sensor further includes a wireless communication module, which is electrically connected to the processor, and the processor is configured to send a prompt signal to an external terminal via the wireless communication module when the trigger event is determined to be a valid event.

[0027] The control method of the pyroelectric sensor of the present application includes obtaining the infrared heat source parameters of the monitoring area, and determining the trigger events occurring in the monitoring area according to the infrared heat source parameters; wherein the trigger events include valid events and invalid events; when the trigger event is determined to be a valid event, the working mode of the camera is adjusted to the trigger mode; when the trigger event is determined to be an invalid event, the working mode of the camera is adjusted to the standby mode. With such a setting, in actual applications, the camera is only activated when necessary, which greatly reduces the working time and thus prolongs the service life of its battery. And because the recorded videos are all key content related to valid events, the storage space is efficiently utilized, reducing the pressure on storage resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 A flow chart of an embodiment of a control method for a pyroelectric sensor of the present application;

[0031] Figure 2 A flowchart diagram of another embodiment of the control method of the pyroelectric sensor of the present application is provided.

[0032] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0034] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0035] In order to maintain uninterrupted video recording, the camera module, processing unit and wireless transmission components of traditional wireless cameras must remain activated for a long time, which greatly shortens the battery life. And because traditional wireless cameras record videos almost all day long, they will generate a large amount of redundant data, which puts pressure on the camera's storage resources.

[0036] To this end, the present application provides a control method of a pyroelectric sensor and a pyroelectric sensor, aiming to solve the technical problem that the existing camera remains activated for a long time, which greatly shortens the battery life and puts pressure on the camera's storage resources. Figure 1 , the control method of the pyroelectric sensor includes:

[0037] Step S100: Acquire infrared heat source parameters of the monitoring area, and determine trigger events occurring in the monitoring area according to the infrared heat source parameters; wherein the trigger events include valid events and invalid events;

[0038] It should be noted that the infrared heat source parameters include at least one of the infrared heat source intensity, the infrared heat source duration and the infrared heat source area. When the infrared heat source parameter is greater than the preset parameter threshold, the trigger event occurring in the monitoring area is determined to be a valid event. When the infrared heat source parameter is less than the preset parameter threshold, the trigger event occurring in the monitoring area is determined to be an invalid event.

[0039] For example, when the control method of the pyroelectric sensor of the present application is applied to home security monitoring, the valid event is when someone enters the monitoring area (such as a courtyard, door, or window), and the invalid event is when the person does not enter the monitoring area. The infrared heat source parameter may include the infrared heat source intensity. When a person enters the monitoring area, the pyroelectric sensor detects the infrared heat source emitted by the human body, so that the infrared heat source intensity in the monitoring area is greater than the preset intensity threshold, thereby determining that the trigger event occurring in the monitoring area is a valid event. When a person does not enter the monitoring area, the pyroelectric sensor does not detect the infrared heat source emitted by the human body, so that the infrared heat source intensity in the monitoring area is less than the preset intensity threshold, thereby determining that the trigger event occurring in the monitoring area is an invalid event.

[0040] In addition, the infrared heat source parameters can also include the duration of the infrared heat source. A valid event is when someone stays or wanders in the monitoring area for a long time, and an invalid event is when someone passes through the monitoring area for a short time. When someone breaks into the monitoring area and stays there for a long time, the pyroelectric sensor detects a longer heat source duration and determines it as a valid event; when a person only passes through the monitoring area for a short time, the pyroelectric sensor detects a shorter heat source duration and determines it as an invalid event.

[0041] For another example, when the control method of the pyroelectric sensor of the present application is applied to wildlife monitoring and research, the infrared heat source parameters may include the infrared heat source area, the valid event is the presence of the target animal entering the monitoring area, and the invalid event is the target animal not entering the monitoring area. When the target animal enters the monitoring area, the infrared heat source area detected by the pyroelectric sensor is smaller than the upper preset area threshold and larger than the lower preset area threshold, thereby determining that the trigger event occurring in the monitoring area is a valid event, wherein the upper preset area threshold and the lower preset area threshold are set according to the actual infrared heat source area of ​​the target animal; and when the target animal does not enter the monitoring area, for example, when a mouse smaller than the target animal enters the monitoring area, the infrared heat source area detected by the pyroelectric sensor is smaller than the lower preset area threshold, or when a person larger than the target animal enters the monitoring area, the infrared heat source area detected by the pyroelectric sensor is larger than the upper preset area threshold, thereby determining that the trigger event occurring in the monitoring area is an invalid event.

[0042] It should be noted that only relying on a single parameter (such as infrared heat source intensity) for detection can easily lead to misjudgment. For example, strong light or ambient temperature changes may cause the infrared heat source intensity to rise temporarily, but it is not a valid event. For another example, a single parameter cannot accurately distinguish between valid events (such as human activities) and invalid events (such as wind blowing leaves). In this regard, the infrared heat source intensity and the infrared heat source duration can be combined to judge valid events and invalid events. Since the infrared heat source intensity of the human body or animal is high and the duration is long, while the infrared heat source intensity of the wind blowing leaves is low and the duration is short, therefore, the control method of the pyroelectric sensor of the present application determines that the trigger event of the monitoring area is a valid event when the infrared heat source intensity is greater than the preset intensity threshold and the infrared heat source duration is greater than the preset time threshold (such as human activities). When the infrared heat source intensity is less than the preset intensity threshold, or the infrared heat source duration is less than the preset time threshold (such as wind blowing leaves, small animals passing by), the trigger event of the monitoring area is determined to be an invalid event. With such a configuration, the control method of the pyroelectric sensor of the present application can more accurately determine the nature of the triggering event, reduce misjudgment and false triggering, and improve the accuracy and reliability of detection.

[0043] It should be noted that the pyroelectric sensor is susceptible to interference from environmental noise in the process of acquiring the infrared heat source parameters of the monitoring area. For example, strong light sources such as sunlight and car lights may cause interference with the infrared heat source parameters, or the wind may blow objects such as leaves and curtains, or small creatures such as birds and insects may trigger short-term infrared signals, all of which may cause short-term fluctuations in the infrared heat source parameters. In this regard, after the pyroelectric sensor acquires the infrared heat source parameters, the control method of the pyroelectric sensor of the present application can use a moving average filter to smooth the infrared heat source parameters to remove short-term fluctuations caused by wind blowing leaves; or use a low-pass filter to filter out high-frequency noise (such as light changes); or set an amplitude threshold to filter out low-amplitude signals caused by small animals. By filtering the raw data collected by the pyroelectric sensor (including time domain filtering, frequency domain filtering, threshold filtering, and multi-sensor fusion), environmental noise can be effectively removed and effective parameters related to the target can be retained.

[0044] Step S200: When it is determined that the trigger event is a valid event, the working mode of the camera is adjusted to the trigger mode; when it is determined that the trigger event is an invalid event, the working mode of the camera is adjusted to the standby mode.

[0045] It should be noted that when the trigger event is determined to be a valid event, such as a person or target animal in the above embodiment entering the monitoring area, the control method of the pyroelectric sensor of the present application controls the working mode of the camera to the trigger mode, so that the camera records the valid events occurring in the monitoring area. The camera works in the trigger mode to increase the frame rate and resolution of the recorded video, so that the user can analyze the valid events based on the higher-definition recorded video. When the trigger event is determined to be an invalid event, such as a person or target animal in the above embodiment entering the monitoring area, the control method of the pyroelectric sensor of the present application controls the working mode of the camera to the standby mode. The camera is in a dormant state in the standby mode, reducing data transmission, reducing the frame rate and resolution of the recorded video, thereby reducing its consumption of battery power and extending battery life. It is understandable that when the camera is working in the trigger mode, the camera continues to monitor the target area until the valid event ends. When the camera is in the working standby mode, the pyroelectric sensor continues to monitor the infrared heat source parameters of the monitoring area, waiting for the next valid event.

[0046] Furthermore, when the triggering event is determined to be a valid event, an alarm prompt and the video recorded by the camera are sent to an external terminal, such as a user's handheld terminal mobile phone or tablet, so that the user can be informed of the abnormal situation in the monitoring area at the first time, so as to quickly take countermeasures based on the recorded video. For example, in a home security scenario, when someone breaks in, the user can immediately view the real-time video or notify the security personnel after receiving the alarm. For another example, when the user receives an alarm prompt of "human body detected entering the backyard", he can determine whether it is a family member or a suspicious person based on the received video.

[0047] The control method of the pyroelectric sensor of the present application includes obtaining the infrared heat source parameters of the monitoring area, and determining the trigger events occurring in the monitoring area according to the infrared heat source parameters; wherein the trigger events include valid events and invalid events; when the trigger event is determined to be a valid event, the working mode of the camera is adjusted to the trigger mode; when the trigger event is determined to be an invalid event, the working mode of the camera is adjusted to the standby mode. With such a setting, in actual applications, the camera is only activated when necessary, which greatly reduces the working time and thus prolongs the service life of its battery. And because the recorded videos are all key content related to valid events, the storage space is efficiently utilized, reducing the pressure on storage resources.

[0048] It should be noted that under strong light conditions (such as direct sunlight), the infrared radiation in the environment may be enhanced, causing the pyroelectric sensor to trigger falsely. Under weak light conditions (such as at night or indoors), the infrared radiation in the environment is weak, which may cause the pyroelectric sensor to be insufficiently sensitive and miss valid events.

[0049] In this regard, in one embodiment of the present application, reference is made to Figure 2 , the control method of the pyroelectric sensor further includes:

[0050] Step S300: obtaining the light intensity of the monitoring area;

[0051] Step S400: When the illumination intensity is less than a preset illumination intensity, the preset parameter threshold is adjusted to increase; and when the illumination intensity is greater than or equal to the preset illumination intensity, the preset parameter threshold is adjusted to decrease.

[0052] In this embodiment, under weak light conditions (such as at night), that is, the light intensity of the monitored area is less than the preset light intensity, the preset parameter threshold (such as infrared heat source intensity, duration, area, etc.) is reduced to ensure that low-intensity valid events (such as human or animal activities) can be detected under weak light conditions. Under strong light conditions (such as daytime), that is, the light intensity is greater than or equal to the preset light intensity, the preset parameter threshold (such as infrared heat source intensity, duration, area, etc.) is increased to avoid misjudging environmental noise under strong light (such as the ground illuminated by sunlight) as a valid event. With such a setting, in actual applications, the control method of the pyroelectric sensor of the present application obtains the light intensity of the monitored area and dynamically adjusts the preset parameter threshold to reduce the interference of ambient light on infrared detection, improve the accuracy of detecting valid events and invalid events, and reduce false triggering and missed detection, thereby adapting to the needs of diversified monitoring scenarios.

[0053] It should be noted that cameras are usually equipped with wireless communication modules (such as Wi-Fi, Bluetooth, ZigBee, etc.) to establish connections with external terminals (such as mobile phones, tablets, cloud servers) and transmit video data. When the trigger event in the monitored area is an invalid event, the camera is in standby mode and does not need to transmit video data. If the wireless communication module still maintains a high power consumption state at this time, it will cause unnecessary power consumption and shorten the battery life.

[0054] In this regard, in one embodiment of the present application, when the pyroelectric sensor includes a wireless communication module, the control method of the pyroelectric sensor further includes:

[0055] In the case where the trigger event is determined to be an invalid event, the operating frequency of the wireless communication module is adjusted to be lowered, for example, from real-time transmission to sending a heartbeat signal every once in a while, so as to reduce the power consumption of the wireless communication module and extend the battery life; or the wireless communication module is controlled to switch a communication protocol with low power consumption characteristics, for example, from high-power Wi-Fi to low-power LoRa communication, thereby greatly reducing the power consumption of the wireless communication module while maintaining basic communication functions. In this way, the control method of the pyroelectric sensor of the present application effectively solves the problem of unnecessary power consumption of the wireless communication module in standby state by reducing the operating frequency of the wireless communication module or switching to a low-power communication protocol in the case of an invalid event. Not only does it significantly reduce power consumption and extend battery life, it also maintains basic communication functions, and is suitable for various scenarios such as home security, commercial monitoring, and field observation. In actual applications, when someone breaks into the monitoring area, the camera switches to trigger mode, and the wireless communication module maintains high-frequency communication (such as Wi-Fi) to transmit video data in real time. When there is no activity in the monitoring area, the camera is in standby mode, and the wireless communication module reduces the operating frequency (such as sending a heartbeat signal every 5 minutes) or switches to LoRa communication, thereby reducing the power consumption of the wireless communication module and extending the battery life.

[0056] The present application provides a pyroelectric sensor, which includes: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the control method of the pyroelectric sensor in the above-mentioned embodiment 1; and a pyroelectric sensing component, wherein the processor is electrically connected to the camera and the pyroelectric sensing component respectively.

[0057] The pyroelectric sensor provided by the present application adopts the control method of the pyroelectric sensor in the above embodiment, which can solve the technical problem that the existing camera remains activated for a long time, greatly shortening the battery life and putting pressure on the storage resources of the camera. Compared with the prior art, the beneficial effects of the pyroelectric sensor provided by the present application are the same as the beneficial effects of the control method of the pyroelectric sensor provided by the above embodiment, and the other technical features of the pyroelectric sensor are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0058] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0060] Traditional pyroelectric sensors rely on batteries, which have limited battery capacity and need to be frequently replaced or recharged, increasing maintenance costs and inconvenience. Especially in outdoor or remote areas, battery-powered pyroelectric sensors may stop working due to power exhaustion, affecting the reliability of the monitoring system.

[0061] In this regard, in one embodiment of the present application, the pyroelectric sensor includes:

[0062] The battery and the solar charging module, the charging end of the solar charging module is connected to the power supply end of the battery, and the solar charging module is used to convert solar energy into electrical energy and output the electrical energy to the battery. In this way, the pyroelectric sensor of the present application replenishes the battery with electrical energy through the solar charging module, significantly prolongs the battery life, and reduces maintenance and battery replacement costs. And under conditions of sufficient light, the system can achieve energy self-sufficiency, reduce dependence on external power sources, adapt to various environmental conditions such as outdoors, in the wild, and in remote areas, and enhance the reliability of the pyroelectric sensor.

[0063] In addition, pyroelectric sensors include:

[0064] The battery management module is electrically connected to the battery and the processor respectively. The battery management module is used to detect the remaining power of the battery and control the processor to enter the power saving mode when the remaining power of the battery is less than the preset power, thereby reducing the system power consumption and extending the battery life.

[0065] In one embodiment of the present application, the pyroelectric sensor also includes a wireless communication module, which is electrically connected to the processor, and the processor is used to send a prompt signal to an external terminal via the wireless communication module when the trigger event is determined to be a valid event.

[0066] In this embodiment, when the trigger event is determined to be a valid event, the processor sends an alarm prompt and the video recorded by the camera to an external terminal, such as a user's handheld terminal mobile phone or tablet, via the wireless communication module, so that the user can be informed of the abnormal situation in the monitoring area at the first time, so as to quickly take countermeasures. For example, in a home security scenario, when someone breaks in, the user can immediately view the real-time video or notify the security personnel after receiving the alarm. For another example, when the user receives an alarm prompt of "human body detected entering the backyard", it can be determined whether it is a family member or a suspicious person based on the received video.

[0067] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A control method for a pyroelectric sensor, applied to a camera, characterized in that: include: Acquire infrared heat source parameters of the monitoring area, and determine trigger events occurring in the monitoring area according to the infrared heat source parameters; wherein the trigger events include valid events and invalid events; When determining that the trigger event is a valid event, adjusting the working mode of the camera to a trigger mode; When it is determined that the trigger event is an invalid event, the working mode of the camera is adjusted to a standby mode.

2. The control method of the pyroelectric sensor according to claim 1, characterized in that: The triggering event that occurs in the monitoring area is determined according to the infrared heat source parameter, including: In the case where the infrared heat source parameter is greater than a preset parameter threshold, determining that the trigger event occurring in the monitoring area is a valid event; When the infrared heat source parameter is less than or equal to the preset parameter threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

3. The control method of the pyroelectric sensor according to claim 2, characterized in that: In the case where the infrared heat source parameter includes the infrared heat source intensity, determining the trigger event occurring in the monitoring area according to the infrared heat source parameter includes: When the intensity of the infrared heat source is greater than a preset intensity threshold, determining that the trigger event occurring in the monitoring area is a valid event; When the intensity of the infrared heat source is less than or equal to the preset intensity threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

4. The control method of the pyroelectric sensor according to claim 2, characterized in that: In the case where the infrared heat source parameter includes the infrared heat source duration, the method for determining the trigger event occurring in the monitoring area according to the infrared heat source parameter includes: When the duration of the infrared heat source is greater than a preset time threshold, determining that the trigger event occurring in the monitoring area is a valid event; When the duration of the infrared heat source is less than or equal to the preset time threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

5. The control method of the pyroelectric sensor according to claim 2, characterized in that: In the case where the infrared heat source parameter includes the infrared heat source area, the method for determining the trigger event occurring in the monitoring area according to the infrared heat source parameter includes: When the area of ​​the infrared heat source is smaller than the upper preset area threshold and larger than the lower preset area threshold, determining that the trigger event occurring in the monitoring area is a valid event; When the area of ​​the infrared heat source is smaller than the lower preset area threshold or larger than the upper preset area threshold, it is determined that the trigger event occurring in the monitoring area is an invalid event.

6. The control method of the pyroelectric sensor according to any one of claims 2 to 5, characterized in that: The control method of the pyroelectric sensor also includes: Get the light intensity of the monitored area; When the illumination intensity is less than the preset illumination intensity, the preset parameter threshold is adjusted to increase, and when the illumination intensity is greater than or equal to the preset illumination intensity, the preset parameter threshold is adjusted to decrease.

7. The control method of the pyroelectric sensor according to claim 1, characterized in that: In the case where the pyroelectric sensor includes a wireless communication module, the control method of the pyroelectric sensor further includes: In the case where the trigger event is determined to be an invalid event, the operating frequency of the wireless communication module is adjusted to be lowered, or the wireless communication module is controlled to switch to a communication protocol with low power consumption characteristics.

8. A pyroelectric sensor, characterized in that: The pyroelectric sensor includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of a control method for a pyroelectric sensor as described in any one of claims 1 to 7; and a pyroelectric sensing component, wherein the processor is electrically connected to the camera and the pyroelectric sensing component, respectively.

9. The pyroelectric sensor according to claim 8, characterized in that: The pyroelectric sensor further includes a wireless communication module, which is electrically connected to the processor. The processor is configured to send a prompt signal to an external terminal via the wireless communication module when the trigger event is determined to be a valid event.

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