Pyroelectric infrared sensor sensitivity adjustment device

Abstract

To provide a pyroelectric infrared sensor sensitivity adjustment device.SOLUTION: A pyroelectric infrared sensor sensitivity adjustment device of the present invention includes a processing module, a sensitivity control module, and a detection function adjustment module. The processing module is used to receive an input signal and generate a sensitivity control signal in accordance with the input signal. The sensitivity control module is connected to the processing module and is used to receive the sensitivity control signal and generate a sensitivity adjustment signal in accordance with the sensitivity control signal. The detection function adjustment module is connected to the processing module and the sensitivity control module and is used to receive the sensitivity adjustment signal, and a detection signal generated by a pyroelectric infrared sensor. The detection function adjustment module adjusts a preset threshold based on the sensitivity adjustment signal and compares the detection signal with the preset threshold to generate a voltage signal. The processing module generates an activation signal to activate a target device or does not generate the activation signal in accordance with the voltage signal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sensor sensitivity adjustment device, and more particularly to a pyroelectric infrared sensor sensitivity adjustment device. [Background technology]

[0002] A pyroelectric infrared (PIR) sensor is a passive infrared sensor that does not emit infrared light but can detect infrared light emitted from moving targets (people, animals, etc.) and generate a detection signal. Pyroelectric infrared sensors are widely used in lighting systems, alarm systems, and other applications. However, conventional pyroelectric infrared sensors still have many drawbacks that need improvement. For example, the sensitivity of conventional pyroelectric infrared sensors cannot be adjusted, making it difficult to meet the requirements of different applications (e.g., when the distance between the sensor and the moving target is long, the sensor requires higher sensitivity; conversely, when the distance between the sensor and the moving target is short, the sensor requires lower sensitivity).

[0003] In addition, pyroelectric infrared sensors may lose sensitivity after a period of use. Conventional pyroelectric infrared sensors lack a compensation mechanism, which may prevent them from effectively detecting moving targets. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide a pyroelectric infrared sensor sensitivity adjustment device. [Means for solving the problem]

[0005] According to one embodiment of the present invention, there is provided a pyroelectric infrared sensor sensitivity adjustment device, which includes a processing module, a sensitivity control module, and a detection function adjustment module. The processing module is used to receive an input signal and generate a sensitivity control signal in response to the input signal. The sensitivity control module is connected to the processing module and is used to receive the sensitivity control signal and generate a sensitivity adjustment signal in response to the sensitivity control signal. The detection function adjustment module is connected to the processing module and the sensitivity control module and is used to receive the sensitivity adjustment signal and a detection signal generated by the pyroelectric infrared sensor. The detection function adjustment module adjusts a preset threshold based on the sensitivity adjustment signal and compares the detection signal with the preset threshold to generate a voltage signal. The processing module generates an activation signal to activate a target device in response to the voltage signal, or does not generate the activation signal.

[0006] In one embodiment, when the detection signal is equal to or greater than the preset threshold, the voltage signal generated by the detection function adjustment module is at a high level, and the processing module generates an activation signal in response to the voltage signal to activate the target device.

[0007] In one embodiment, if the sense signal is lower than the preset threshold, the voltage signal generated by the sense function adjustment module is at a low level and the processing module does not generate the activation signal.

[0008] In one embodiment, the detection function adjustment module stores each received detection signal, and sequentially divides a preset number of recently received detection signals into at least three groups, the time points of the detection signals in each group being adjacent, and the detection function adjustment module calculates an average value of the intensities of the detection signals in each group, and fine-tunes the preset threshold according to the average value of each group.

[0009] In one embodiment, the three groups include a first group, a second group, and a third group, and when the average value of the first group is smaller than the average value of the second group and the average value of the second group is smaller than the average value of the third group, the detection function adjustment module calculates a difference between the average value of the third group and the average value of the second group, and adjusts the preset threshold based on a ratio between the difference and the average value of the third group.

[0010] In one embodiment, the sensing function adjustment module subtracts the ratio value from 1 to generate an adjustment value, multiplies the adjustment value by a preset threshold to generate an adjusted preset threshold, and generates a voltage signal based on the adjusted preset threshold.

[0011] In one embodiment, the pyroelectric infrared sensor sensitivity adjustment device further includes a power supply module, which is connected to the processing module.

[0012] In one embodiment, the power supply module includes a rectifier circuit, a filter circuit, and a converter.

[0013] In one embodiment, the processing module is a microcontroller, a central processing unit, a special purpose integrated circuit chip, or a field programmable logic gate array.

[0014] In one embodiment, the sensing function adjustment module is a microcontroller, a central processing unit, a special purpose integrated circuit chip, or a field programmable logic gate array. [Effects of the Invention]

[0015] Based on the above, the pyroelectric infrared sensor sensitivity adjustment device according to the embodiment of the present invention may have one or more of the following advantages. (1) In one embodiment of the present invention, the pyroelectric infrared sensor sensitivity adjustment device includes a processing module, a sensitivity control module, and a detection function adjustment module. The processing module is used to receive an input signal and generate a sensitivity control signal in response to the input signal. The sensitivity control module is connected to the processing module and is used to receive the sensitivity control signal and generate a sensitivity adjustment signal in response to the sensitivity control signal. The detection function adjustment module is connected to the processing module and the sensitivity control module and is used to receive the sensitivity adjustment signal and the detection signal generated by the pyroelectric infrared sensor. The detection function adjustment module adjusts a preset threshold based on the sensitivity adjustment signal and compares the detection signal with the preset threshold to generate a voltage signal. The processing module generates an activation signal to activate a target device in response to the voltage signal, or does not generate an activation signal. As can be seen from the above, the pyroelectric infrared sensor sensitivity adjustment device achieves the sensitivity adjustment function by integrating the sensitivity control module and the detection function adjustment module. Therefore, users can adjust the sensitivity of the pyroelectric infrared sensor according to actual needs to meet different application needs. (2) In one embodiment of the present invention, the detection function adjustment module of the pyroelectric infrared sensor sensitivity adjustment device stores each received detection signal and sequentially divides the most recently received detection signals into at least three groups, each of which has a predetermined number of detection signals. The detection signals in each group are adjacent in time. The detection function adjustment module calculates the average intensity of the detection signals in each group and fine-tunes the preset threshold value according to the average intensity of each group. The above-mentioned window fine-tuning mechanism (sequentially dividing the detection signals into multiple groups, each group being considered as a window) allows the pyroelectric infrared sensor sensitivity adjustment device to adaptively and automatically adjust the sensitivity of the pyroelectric infrared sensor according to the deterioration state of the pyroelectric infrared sensor over time, thereby achieving high adjustment accuracy. Therefore, the pyroelectric infrared sensor achieves very high detection accuracy and can meet the needs of practical applications. (3) In one embodiment of the present invention, the circuit design of the sensitivity control module of the pyroelectric infrared sensor sensitivity adjustment device allows for multiple sensitivity adjustment gears to be implemented for user selection. The user can run an application program via an electronic device (such as a smartphone, tablet computer, or laptop) to operate the sensitivity control module and select an appropriate sensitivity adjustment level. Therefore, the pyroelectric infrared sensor sensitivity adjustment device can meet the needs of different users and provide greater flexibility in use. (4) In one embodiment of the present invention, a user can operate the sensitivity control module through an electronic device to select an appropriate sensitivity adjustment gear. Therefore, the pyroelectric infrared sensor sensitivity adjustment device is not only convenient and easy to use, but also allows users to quickly perform sensitivity adjustment without the assistance of a technician. Therefore, the application range of the pyroelectric infrared sensor sensitivity adjustment device is broader and can better meet the needs of actual applications. (5) In one embodiment of the present invention, the pyroelectric infrared sensor sensitivity adjusting device can be integrated with various existing intelligent systems (such as smart home systems) to realize different intelligent applications. Therefore, the pyroelectric infrared sensor sensitivity adjusting device can improve the functionality of existing intelligent systems and adapt to future development trends. (6) In one embodiment of the present invention, the design of the sensitivity adjustment device for a pyroelectric infrared sensor is simple, so that the desired effect can be achieved without significantly increasing costs, and the sensitivity adjustment device for a pyroelectric infrared sensor can achieve higher practicality. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a block diagram showing a circuit configuration of a pyroelectric infrared sensor sensitivity adjustment device according to a first embodiment of the present invention. [Figure 2] 3A to 3C are explanatory diagrams illustrating an operating state of the pyroelectric infrared sensor sensitivity adjustment device according to the first embodiment of the present invention. [Figure 3]1 is a circuit diagram of a pyroelectric infrared sensor sensitivity adjustment device according to a first embodiment of the present invention. [Figure 4] FIG. 5 is a block diagram showing the circuit configuration of a pyroelectric infrared sensor sensitivity adjustment device according to a second embodiment of the present invention. [Figure 5] 10 is a flowchart of a method for adjusting the sensitivity of a pyroelectric infrared sensor according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] In the following embodiments, detailed features and advantages of the present invention are described, the contents of which are sufficient to enable those skilled in the art to understand the technical contents of the present invention and implement them accordingly, and the disclosure contents, claims and drawings of this specification allow those skilled in the art to easily understand the objectives and advantages of the present invention.

[0018] Hereinafter, embodiments of the pyroelectric infrared sensor sensitivity adjustment device of the present invention will be described with reference to the associated drawings. However, for clarity and ease of description in the drawings, the dimensions and proportions of each component in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is described as being "connected" or "coupled" to another component, this may be directly connected or coupled to the other component, or an intervening component may be present. When a component is described as being "directly connected" or "directly coupled" to another component, this does not mean that an intervening component is present, and other terms describing the relationship between components or layers should be interpreted similarly. For ease of understanding, the same components in the following embodiments will be denoted and described with the same reference numerals.

[0019] Please refer to Figures 1 and 2. Figure 1 is a block diagram of the circuit configuration of the pyroelectric infrared sensor sensitivity adjustment device of the first embodiment of the present invention. Figure 2 is an explanatory diagram of the operating state of the pyroelectric infrared sensor sensitivity adjustment device of the first embodiment of the present invention. As shown in Figure 1, the pyroelectric infrared sensor sensitivity adjustment device 1 includes a processing module 11, a sensitivity control module 12, and a detection function adjustment module 13.

[0020] The processing module 11 is connected to the sensitivity control module 12 and the detection function adjustment module 13, and the sensitivity control module 12 and the detection function adjustment module 13 are connected to each other. In one embodiment, the processing module 11 may be a microcontroller unit (MCU). In another embodiment, the processing module 11 may be a central processing unit (CPU), an application specific integrated circuit chip (ASIC), a field programmable gate array (FPGA), or other similar components. In one embodiment, the detection function adjustment module 13 may be a microcontroller unit (MCU). In another embodiment, the detection function adjustment module 13 may be a central processing unit (CPU), an application specific integrated circuit chip (ASIC), a field programmable gate array (FPGA), or other similar components.

[0021] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the pyroelectric infrared sensor sensitivity adjustment device of this embodiment should still fall within the scope of protection of the present invention.

[0022] 2, the processing module 11 receives an input signal Is and generates a sensitivity control signal Fs in response to the input signal Is. A user can run an application via an electronic device ED (such as a smartphone, tablet computer, or laptop) to generate the input signal Is.

[0023] The sensitivity control module 12 receives the sensitivity control signal Fs and generates a sensitivity adjustment signal As in response to the sensitivity control signal Fs.

[0024] The detection function adjustment module 13 receives the sensitivity adjustment signal As. Then, the detection function adjustment module 13 adjusts the preset threshold based on the sensitivity adjustment signal As. When the pyroelectric infrared sensor PR detects a moving target (a person, an animal, etc.), it generates a detection signal Ds and transmits the detection signal Ds to the detection function adjustment module 13. The detection function adjustment module 13 compares the detection signal Ds with the preset threshold to generate a voltage signal Vs and transmits it to the processing module 11.

[0025] Finally, the processing module 11 generates an activation signal Cs in response to the voltage signal Vs to activate the target device TB, or does not generate the activation signal Cs. When the detection signal Ds is equal to or greater than the preset threshold, the voltage signal Vs generated by the detection function adjustment module 13 becomes high, and the processing module 11 generates an activation signal Cs in response to the voltage signal Vs to activate the target device TB. When the detection signal Ds is lower than the preset threshold, the voltage signal Vs generated by the detection function adjustment module 13 becomes low, and the processing module 11 does not generate the activation signal Cs. In this embodiment, the target device TB may be a lighting device. In another embodiment, the target device TB may be a conventional electronic device or household appliance, such as a stereo, television, or alarm. For example, when the distance between the pyroelectric infrared sensor PR and the moving target is large, the user can increase the sensitivity of the pyroelectric infrared sensor PR. Conversely, when the distance between the pyroelectric infrared sensor PR and the moving target is small, the user can decrease the sensitivity of the pyroelectric infrared sensor PR.

[0026] The pyroelectric infrared sensor PR may deteriorate over time. The detection function adjustment module 13 can also implement a special window fine-tuning mechanism to automatically and adaptively adjust the sensitivity of the pyroelectric infrared sensor PR according to the state of aging of the pyroelectric infrared sensor PR. The detection function adjustment module 13 stores each received detection signal D and sequentially divides a preset number of recently received detection signals D into at least three groups, with the time points of the detection signals D in each group being adjacent. The detection function adjustment module 13 calculates the average value of the intensities of the multiple detection signals D in each group and fine-tunes the preset threshold value according to the average value of each group. For example, the three groups include a first group, a second group, and a third group (however, this is not limited to three groups and can be adjusted according to actual needs). If the average value of the first group is smaller than the average value of the second group and the average value of the second group is smaller than the average value of the third group, the detection function adjustment module 13 calculates the difference between the average value of the third group and the average value of the second group, and adjusts the preset threshold value based on the ratio of this difference to the average value of the third group. The detection function adjustment module 13 subtracts the ratio from 1 to generate an adjustment value, multiplies the adjustment value by a preset threshold to generate an adjusted preset threshold, and generates a voltage signal based on the adjusted preset threshold.

[0027] For example, the detection function adjustment module 13 can divide the 15 most recently received detection signals D (the preset number is not limited to 15 and can be adjusted according to actual needs) into three groups in order. Each group contains five detection signals D, and the time points of these detection signals D are adjacent. That is, the first group contains five detection signals D, and the time points of these detection signals D are adjacent. The second group contains five detection signals D, and the time points of these detection signals D are adjacent. The third group contains five detection signals D, and the time points of these detection signals D are adjacent. The detection function adjustment module 13 calculates the average value of the intensities of the multiple detection signals Ds in each group. If the average value of the first group is smaller than the average value of the second group and is smaller than the average value of the third group, the detection function adjustment module 13 determines that the pyroelectric infrared sensor PR is experiencing aging. In this case, the detection function adjustment module 13 calculates the difference between the average value of the third group and the average value of the second group, and then calculates the ratio of this difference to the average value of the third group. Then, the detection function adjustment module 13 subtracts the ratio value from 1 to generate an adjustment value, multiplies the adjustment value by a preset threshold to generate an adjusted preset threshold, and generates a voltage signal Vs based on the adjusted preset threshold. For example, if the adjustment value is 0.9, the detection function adjustment module 13 multiplies 0.9 by the preset threshold to generate an adjusted preset threshold, and generates a voltage signal Vs based on the adjusted preset threshold.

[0028] As can be seen from the above, in this embodiment, the pyroelectric infrared sensor sensitivity adjusting device 1 achieves the sensitivity adjustment function by integrating the sensitivity control module 12 and the detection function adjustment module 13. Therefore, users can adjust the sensitivity of the pyroelectric infrared sensor PR according to actual needs to meet the needs of different applications.

[0029] In this embodiment, the detection function adjustment module 13 of the pyroelectric infrared sensor sensitivity adjustment device 1 stores each received detection signal Ds and sequentially divides the most recently received detection signals Ds into at least three groups, a preset number of times. The detection signals D in each group are adjacent in time. The detection function adjustment module 13 calculates the average intensity of the detection signals D in each group and fine-tunes the preset threshold value according to the average value for each group. The pyroelectric infrared sensor sensitivity adjustment device 1 uses the above-mentioned window fine-tuning mechanism (which divides the detection signals Ds into multiple groups, each of which can be considered a window) to adaptively and automatically adjust the sensitivity of the pyroelectric infrared sensor PR according to the aging state of the pyroelectric infrared sensor PR, thereby achieving high adjustment accuracy. Therefore, the pyroelectric infrared sensor PR achieves extremely high detection accuracy and can meet the needs of practical applications.

[0030] In addition, in this embodiment, the circuit design of the sensitivity control module 12 of the pyroelectric infrared sensor sensitivity adjusting device 1 allows multiple sensitivity adjustment gears to be implemented for user selection. The user can run an application program via an electronic device ED (such as a smartphone, tablet computer, or laptop) and operate the sensitivity control module 12 to select the appropriate sensitivity adjustment gear. Therefore, the pyroelectric infrared sensor sensitivity adjusting device 1 can meet the needs of different users and provide greater flexibility in use.

[0031] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the pyroelectric infrared sensor sensitivity adjustment device of this embodiment should still fall within the scope of protection of the present invention.

[0032] 3 is a circuit diagram of a pyroelectric infrared sensor sensitivity adjustment device 1 according to a first embodiment of the present invention. As shown in the figure, the pyroelectric infrared sensor sensitivity adjustment device 1 includes a processing module 11, a sensitivity control module 12, and a detection function adjustment module 13.

[0033] The processing module 11 includes a signal receiving pin T1, a first signal output pin SEN1, and a second signal output pin SEN2.

[0034] The detection function adjustment module 13 includes a voltage output pin X1 and a sensitivity adjustment pin X2.

[0035] The sensitivity control module 12 includes two voltage divider circuits: a first voltage divider circuit includes resistors R1 to R3 and a switch S1, and a second voltage divider circuit includes resistors R4 to R6 and a switch S2.

[0036] The processing module 11 outputs a sensitivity control signal Fs via the first signal output pin SEN1 and the second signal output pin SEN2. The sensitivity control module 12 receives the sensitivity control signal Fs, generates a sensitivity adjustment signal As according to the sensitivity control signal Fs, and inputs the sensitivity adjustment signal As to the sensitivity adjustment pin X2 of the detection function adjustment module 13. The two voltage divider circuits of the sensitivity control module 12 can generate four different sensitivity adjustment levels. The voltage output pin X1 of the detection function adjustment module 13 then outputs a voltage signal Vs to the signal receiving pin T1 of the processing module 11. The above circuit design can be modified according to actual needs, and the sensitivity control module 12 can generate more sensitivity adjustment gears, but the present invention is not limited thereto.

[0037] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the pyroelectric infrared sensor sensitivity adjustment device of this embodiment should still fall within the scope of protection of the present invention.

[0038] However, conventional pyroelectric infrared sensors still have many drawbacks that need to be improved. For example, the sensitivity of conventional pyroelectric infrared sensors cannot be adjusted, making it difficult to meet the requirements of different applications (e.g., when the distance between the sensor and the moving target is large, the sensor requires higher sensitivity; conversely, when the distance between the sensor and the moving target is small, the sensor requires lower sensitivity). Furthermore, the sensitivity of pyroelectric infrared sensors may decrease after a certain period of use. Conventional pyroelectric infrared sensors lack a compensation mechanism, which may prevent them from effectively detecting moving targets. In contrast, according to an embodiment of the present invention, a pyroelectric infrared sensor sensitivity adjustment device includes a processing module, a sensitivity control module, and a detection function adjustment module. The processing module is used to receive an input signal and generate a sensitivity control signal in response to the input signal. The sensitivity control module is connected to the processing module and is used to receive the sensitivity control signal and generate a sensitivity adjustment signal in response to the sensitivity control signal. The detection function adjustment module is connected to the processing module and the sensitivity control module and is used to receive the sensitivity adjustment signal and the detection signal generated by the pyroelectric infrared sensor. The detection function adjustment module adjusts the preset threshold value according to the sensitivity adjustment signal, and compares the detection signal with the preset threshold value to generate a voltage signal. The processing module generates an activation signal to activate the target device according to the voltage signal, or does not generate an activation signal. As can be seen from the above, the pyroelectric infrared sensor sensitivity adjustment device achieves the sensitivity adjustment function by integrating the sensitivity control module and the detection function adjustment module. Therefore, users can adjust the sensitivity of the pyroelectric infrared sensor according to actual needs to meet the needs of different applications.

[0039] In addition, in an embodiment of the present invention, the detection function adjustment module of the pyroelectric infrared sensor sensitivity adjustment device stores each received detection signal and sequentially divides the most recently received detection signals into at least three groups, a preset number of times. The detection signals in each group are adjacent in time. The detection function adjustment module calculates the average intensity of the detection signals in each group and fine-tunes the preset threshold value according to the average intensity of each group. By using the above-mentioned window fine-tuning mechanism (sequentially dividing the detection signals into multiple groups, each group being considered as a window), the pyroelectric infrared sensor sensitivity adjustment device can adaptively and automatically adjust the sensitivity of the pyroelectric infrared sensor according to the aging state of the pyroelectric infrared sensor, thereby achieving high adjustment accuracy. Therefore, the pyroelectric infrared sensor can achieve very high detection accuracy and meet the needs of practical applications.

[0040] In addition, in an embodiment of the present invention, the circuit design of the sensitivity control module of the pyroelectric infrared sensor sensitivity adjustment device allows for multiple sensitivity adjustment gears to be realized and selected by the user. The user can run an application program via an electronic device (such as a smartphone, tablet computer, or laptop) to operate the sensitivity control module and select an appropriate sensitivity adjustment level. Therefore, the pyroelectric infrared sensor sensitivity adjustment device can meet the needs of different users and is more flexible in use.

[0041] In addition, in the embodiment of the present invention, a user can operate the sensitivity control module through an electronic device to select an appropriate sensitivity adjustment gear. Therefore, the pyroelectric infrared sensor sensitivity adjustment device is not only convenient and easy to use, but also allows users to quickly perform sensitivity adjustment without the assistance of a technician. Therefore, the application range of the pyroelectric infrared sensor sensitivity adjustment device is broader and can better meet the needs of actual applications.

[0042] In addition, in the embodiments of the present invention, the pyroelectric infrared sensor sensitivity adjusting device can be integrated with various existing intelligent systems (such as smart home systems) to realize different intelligent applications, thereby improving the functions of existing intelligent systems and adapting to future development trends.

[0043] Furthermore, in the embodiment of the present invention, the design of the sensitivity adjustment device for a pyroelectric infrared sensor is simple, so that the desired effect can be achieved without significantly increasing costs. Therefore, the sensitivity adjustment device for a pyroelectric infrared sensor can achieve higher practicality. From the above, it can be seen that the sensitivity adjustment device for a pyroelectric infrared sensor according to the embodiment of the present invention can indeed achieve excellent technical effects.

[0044] 4 is a block diagram of the circuit configuration of a pyroelectric infrared sensor sensitivity adjustment device according to a second embodiment of the present invention. As shown in the figure, the pyroelectric infrared sensor sensitivity adjustment device 1 includes a processing module 11, a sensitivity control module 12, and a detection function adjustment module 13.

[0045] The processing module 11 is connected to the sensitivity control module 12 and the detection function adjustment module 13, and the sensitivity control module 12 and the detection function adjustment module 13 are connected to each other. In one embodiment, the processing module 11 may be a microcontroller unit (MCU). In another embodiment, the processing module 11 may be a central processing unit (CPU), an application specific integrated circuit chip (ASIC), a field programmable gate array (FPGA), or other similar components. In one embodiment, the detection function adjustment module 13 may be a microcontroller unit (MCU). In another embodiment, the detection function adjustment module 13 may be a central processing unit (CPU), an application specific integrated circuit chip (ASIC), a field programmable gate array (FPGA), or other similar components.

[0046] Since the above components are similar to those in the previous embodiment, they will not be described in detail here. Unlike the previous embodiment, the pyroelectric infrared sensor sensitivity adjustment device 1 of this embodiment further includes a power supply module 14. The power supply module 14 is connected to the processing module 11. The power supply module 14 includes a rectifier circuit, a filter circuit, a converter, and other necessary components to supply power to the processing module 11. Therefore, the pyroelectric infrared sensor sensitivity adjustment device 1 can be installed in an appropriate location within a building and connected to an external power source (e.g., a commercial power source). In another embodiment, the pyroelectric infrared sensor sensitivity adjustment device 1 also includes a battery, which supplies power to the processing module 11.

[0047] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the pyroelectric infrared sensor sensitivity adjustment device of this embodiment should still fall within the scope of protection of the present invention.

[0048] 5 is a flowchart of a method for adjusting the sensitivity of a pyroelectric infrared sensor according to a third embodiment of the present invention. As shown in the figure, the method for adjusting the sensitivity of a pyroelectric infrared sensor according to this embodiment can include the following steps: Step S51: Receive an input signal through a processing module. Step S52: A sensitivity control signal is generated according to the input signal by the processing module. Step S53: Receive a sensitivity control signal through the sensitivity control module. Step S54: The sensitivity control module generates a sensitivity adjustment signal according to the sensitivity control signal. Step S55: Receive the sensitivity adjustment signal and the detection signal generated by the pyroelectric infrared sensor via the detection function adjustment module. Step S56: The detection function adjusting module adjusts the preset threshold according to the sensitivity adjusting signal, and compares the detection signal with the preset threshold to generate a voltage signal. Step S57: Generate an activation signal to activate the target device according to the voltage signal through the processing module, or do not generate an activation signal.

[0049] Of course, this embodiment is only used for illustrative purposes and does not limit the scope of the present invention, and any equivalent modifications or variations made based on the pyroelectric infrared sensor sensitivity adjustment method of this embodiment should still fall within the scope of protection of the present invention.

[0050] Although the steps of the methods described herein are shown and described in a particular order, the order of operations of each method may be changed, some steps may be performed in reverse order or simultaneously with other steps, and in other embodiments, different steps may be performed intermittently and / or alternately.

[0051] In summary, according to an embodiment of the present invention, the pyroelectric infrared sensor sensitivity adjustment device includes a processing module, a sensitivity control module, and a detection function adjustment module. The processing module is used to receive an input signal and generate a sensitivity control signal in response to the input signal. The sensitivity control module is connected to the processing module and is used to receive the sensitivity control signal and generate a sensitivity adjustment signal in response to the sensitivity control signal. The detection function adjustment module is connected to the processing module and the sensitivity control module and is used to receive the sensitivity adjustment signal and the detection signal generated by the pyroelectric infrared sensor. The detection function adjustment module adjusts a preset threshold based on the sensitivity adjustment signal and compares the detection signal with the preset threshold to generate a voltage signal. The processing module generates an activation signal to activate the target device in response to the voltage signal, or does not generate an activation signal. As can be seen from the above, the pyroelectric infrared sensor sensitivity adjustment device achieves the sensitivity adjustment function by integrating the sensitivity control module and the detection function adjustment module. Therefore, users can adjust the sensitivity of the pyroelectric infrared sensor according to actual needs to meet the needs of different applications.

[0052] In addition, in an embodiment of the present invention, the detection function adjustment module of the pyroelectric infrared sensor sensitivity adjustment device stores each received detection signal and sequentially divides the most recently received detection signals into at least three groups, a preset number of times. The detection signals in each group are adjacent in time. The detection function adjustment module calculates the average intensity of the detection signals in each group and fine-tunes the preset threshold value according to the average intensity of each group. By using the above-mentioned window fine-tuning mechanism (sequentially dividing the detection signals into multiple groups, each group being considered as a window), the pyroelectric infrared sensor sensitivity adjustment device can adaptively and automatically adjust the sensitivity of the pyroelectric infrared sensor according to the aging state of the pyroelectric infrared sensor, thereby achieving high adjustment accuracy. Therefore, the pyroelectric infrared sensor can achieve very high detection accuracy and meet the needs of practical applications.

[0053] In addition, in an embodiment of the present invention, the circuit design of the sensitivity control module of the pyroelectric infrared sensor sensitivity adjustment device allows for multiple sensitivity adjustment gears to be realized and selected by the user. The user can run an application program via an electronic device (such as a smartphone, tablet computer, or laptop) to operate the sensitivity control module and select an appropriate sensitivity adjustment level. Therefore, the pyroelectric infrared sensor sensitivity adjustment device can meet the needs of different users and is more flexible in use.

[0054] In addition, in the embodiment of the present invention, a user can operate the sensitivity control module through an electronic device to select an appropriate sensitivity adjustment gear. Therefore, the pyroelectric infrared sensor sensitivity adjustment device is not only convenient and easy to use, but also allows users to quickly perform sensitivity adjustment without the assistance of a technician. Therefore, the application range of the pyroelectric infrared sensor sensitivity adjustment device is broader and can better meet the needs of actual applications.

[0055] In addition, in the embodiments of the present invention, the pyroelectric infrared sensor sensitivity adjusting device can be integrated with various existing intelligent systems (such as smart home systems) to realize different intelligent applications, thereby improving the functions of existing intelligent systems and adapting to future development trends.

[0056] Furthermore, in the embodiment of the present invention, the design of the sensitivity adjustment device for a pyroelectric infrared sensor is simple, so that the desired effect can be achieved without significantly increasing the cost, and therefore the sensitivity adjustment device for a pyroelectric infrared sensor can achieve higher practicality.

[0057] Although the above embodiments are described in this specification, it should be noted that they do not limit the scope of the claims of the present invention. Therefore, any changes and modifications to the embodiments described in this specification based on the innovative concept of the present invention, or the replacement of equivalent structures or equivalent processes made using the contents of the specification and drawings of the present invention, or the direct or indirect application of the above technical solutions to other related technical fields, are all within the scope of the claims of the present invention. [Explanation of symbols]

[0058] 1. Pyroelectric infrared sensor sensitivity adjustment device 11 Processing Module 12 Sensitivity Control Module 13. Detection function adjustment module 14 Power Supply Modules R1 Resistor R2 resistance R3 resistance R4 resistance R5 resistance R6 resistance S1 Switch S2 Switch T1 signal receiving pin SEN1 First signal output pin SEN2 Second signal output pin X1 voltage output pin X2 Sensitivity adjustment pin ED Electronic Device TB target device PR Pyroelectric Infrared Sensor Is Input signal Fs Sensitivity control signal As Sensitivity adjustment signal Ds sensor signal Vs voltage signal Cs start signal S51 Step S52 Step S53 Step S54 Step S55 Step S56 Step S57 Step

Claims

1. a processing module adapted to receive an input signal and generate a sensitivity control signal in response to the input signal; a sensitivity control module connected to the processing module, the sensitivity control module being used to receive the sensitivity control signal and generate a sensitivity adjustment signal in response to the sensitivity control signal; a detection function adjustment module connected to the processing module and the sensitivity control module, used to receive the sensitivity adjustment signal and the detection signal generated by the pyroelectric infrared sensor; The pyroelectric infrared sensor sensitivity adjustment device is characterized in that the detection function adjustment module adjusts a preset threshold based on the sensitivity adjustment signal, compares the detection signal with the preset threshold to generate a voltage signal, and the processing module generates an activation signal in response to the voltage signal to activate a target device, or does not generate the activation signal.

2. 2. The pyroelectric infrared sensor sensitivity adjustment device according to claim 1, wherein when the detection signal is greater than or equal to the preset threshold, the voltage signal generated by the detection function adjustment module becomes high level, and the processing module generates the activation signal according to the voltage signal to activate the target device.

3. 3. The pyroelectric infrared sensor sensitivity adjustment device according to claim 2, wherein when the detection signal is lower than the preset threshold, the voltage signal generated by the detection function adjustment module is at a low level, and the processing module does not generate the activation signal.

4. 2. The pyroelectric infrared sensor sensitivity adjustment device according to claim 1, wherein the detection function adjustment module stores the detection signal received each time, and sequentially divides a preset number of the most recently received detection signals into at least three groups, the time points of the detection signals of the plurality of the groups being adjacent, and the detection function adjustment module calculates an average value of the intensities of the plurality of the detection signals of each group, and fine-tunes the preset threshold value according to the average value of each group.

5. 5. The pyroelectric infrared sensor sensitivity adjustment device of claim 4, wherein the at least three groups include a first group, a second group, and a third group, and the detection function adjustment module calculates a difference between the average value of the third group and the average value of the second group when the average value of the first group is smaller than the average value of the second group and the average value of the second group is smaller than the average value of the third group, and adjusts the preset threshold based on a ratio between the difference and the average value of the third group.

6. 6. The pyroelectric infrared sensor sensitivity adjustment device according to claim 5, wherein the detection function adjustment module subtracts the ratio value from 1 to generate an adjustment value, multiplies the adjustment value by the preset threshold to generate an adjusted preset threshold, and generates the voltage signal based on the adjusted preset threshold.

7. 2. The pyroelectric infrared sensor sensitivity adjustment device according to claim 1, further comprising a power supply module, said power supply module being connected to said processing module.

8. 8. The pyroelectric infrared sensor sensitivity adjusting device according to claim 7, wherein the power supply module includes a rectifier circuit, a filter circuit, and a converter.

9. 2. The pyroelectric infrared sensor sensitivity adjusting device according to claim 1, wherein the processing module is a microcontroller, a central processing unit, a special purpose integrated circuit chip, or a field programmable logic gate array.

10. 2. The pyroelectric infrared sensor sensitivity adjusting device according to claim 1, wherein the detection function adjusting module is a microcontroller, a central processing unit, a special purpose integrated circuit chip, or a field programmable logic gate array.

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