Illumination control system and control method based on infrared sensor

Abstract

The present invention provides an infrared sensor-based lighting control system and a control method, the lighting control system comprising: an infrared sensor, a control chip, a first resistor, a light emitting diode and a power module; the infrared sensor is used to collect current infrared data, and generate current message data from the current infrared data and send it to the control chip; when the control chip is in a working state, the control chip is used to provide a working voltage for the infrared sensor, and is also used to perform data processing according to the current message data to obtain target infrared data, and is also used to generate a corresponding target control signal according to the target infrared data, so that the target control signal drives the light emitting diode to light up or extinguish; the present invention greatly reduces the number of peripheral components of the application circuit, not only reduces the overall circuit power consumption, but also achieves a higher integration and reduces the circuit cost.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting control, and in particular to a lighting control system and a control method based on infrared sensors. Background Art

[0002] In the field of lighting, lighting control plays an important role. Traditional lighting control is to add a switch near the circuit, and the switch controls the lighting, which is manual control. Furthermore, infrared sensors are used for lighting control, that is, infrared sensors are added to the lighting to detect human bodies. When the presence of a human body is detected, the lighting device is turned on, and when no human body is detected, the lighting device is turned off.

[0003] However, the current infrared sensor-based lighting control system has a power supply device and a drive device that separately provide power to the infrared sensor, which increases the power consumption and cost of the lighting control system and cannot meet the needs of users. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an infrared sensor-based lighting control system and a control method, which solve the problems of high power consumption and high cost of the lighting control system in the prior art and meet the needs of users.

[0005] In a first aspect, the present invention provides a lighting control system based on an infrared sensor, the lighting control system comprising: an infrared sensor, a control chip, a first resistor, a light emitting diode and a power module; the output end of the infrared sensor is connected to the data communication end of the control chip, for collecting current infrared data, and generating current message data from the current infrared data and sending it to the control chip; the power end of the control chip is connected to the power module, the LDO output end of the control chip is connected to the power end of the infrared sensor, the output end of the control chip is connected to the first end of the first resistor, the second end of the first resistor is connected to the cathode of the light emitting diode, and the anode of the light emitting diode is connected to the power end of the control chip; when the control chip is in a working state, the control chip is used to provide a working voltage for the infrared sensor, and is also used to perform data processing according to the current message data to obtain target infrared data, and is also used to generate a corresponding target control signal according to the target infrared data, so that the target control signal drives the light emitting diode to light up or turn off.

[0006] Optionally, the lighting control system also includes: a voltage-dividing resistor and a photoresistor; the first end of the voltage-dividing resistor is connected to the power supply end of the control chip, the second end of the voltage-dividing resistor is connected to the first end of the photoresistor, the second end of the photoresistor is grounded, and the first end of the photoresistor is also connected to the photosensitive control end of the control chip. When the photosensitive control end of the control chip receives a high level, the control chip is triggered to be in the working state.

[0007] Optionally, the control chip includes: a data communication module connected to the infrared sensor, used to receive the current message data sent by the infrared sensor; a digital signal processing module connected to the data communication module, used to separate the current message data and obtain the current infrared data; the digital signal processing module is also used to filter the current infrared data to obtain target infrared data; a dynamic threshold judgment module, connected to the digital signal processing module, used to compare the target infrared data with the current trigger threshold, and send a corresponding target control signal according to the comparison result.

[0008] Optionally, the digital signal processing module includes: a data separation module, connected to the data communication module, used to perform data separation on the current message data, and obtain a specific header code, source infrared data and a specific tail code in the current message data; a specific code verification module, connected to the data separation module, used to verify the specific header code and the specific tail code according to a preset verification rule; a limiting filtering module, connected to the specific code verification module, used to perform limiting filtering on the current infrared data.

[0009] Optionally, the digital signal processing module further includes: a sliding average filtering module, connected to the limiting filtering module, and configured to filter the current infrared data according to the sliding average value to obtain the target infrared data.

[0010] In a second aspect, the present invention provides a control method based on an infrared sensor, which is applied to the control chip of the lighting control system. The method includes: when the control chip is in a working state, receiving current message data sent by the infrared sensor; performing data separation on the current message data to obtain current infrared data; filtering the current infrared data to obtain target infrared data; comparing the target infrared data with the current trigger threshold, and sending a corresponding target control signal to the light-emitting diode according to the comparison result, so that the target control signal drives the light-emitting diode to light up or go out.

[0011] Optionally, performing data separation on the current message data to obtain current infrared data includes: performing data separation on the current message data to obtain a specific header code, source infrared data and a specific tail code in the current message data;

[0012] Verifying the specific header code and the specific tail code according to a preset verification rule;

[0013] When the verification of the specific header code and the specific tail code succeeds, the source infrared data is used as the current infrared data.

[0014] Optionally, the current infrared data is filtered to obtain target infrared data, including: obtaining the difference between the previous infrared data and the current infrared data; determining whether the difference is less than or equal to a preset maximum deviation value; when the difference is less than or equal to the preset maximum deviation value, using the current infrared data as the target infrared data.

[0015] Optionally, when the difference is less than or equal to the preset maximum deviation value, the method further includes: filtering the current infrared data according to a sliding average value to obtain the target infrared data.

[0016] Optionally, before comparing the target infrared data with the current trigger threshold, the method further includes: acquiring a current control state of the lighting control system; and dynamically adjusting the current trigger threshold according to the current control state.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The control chip of the present invention can be integrated with a linear voltage regulator module, which is connected to the positive power supply terminal of the infrared sensor through the LDO output terminal, so as to provide a stable operating voltage for the infrared sensor and ensure its normal operation. Compared with the prior art that uses an external power supply module to provide power to the infrared sensor, the number of peripheral components of the application circuit can be reduced, the cost is reduced, and it is beneficial to the miniaturization of the overall equipment; the control chip of the present invention can be integrated with a power MOSFET drive module to meet the driving needs of the lighting equipment. Compared with the structure of connecting an independent drive device to the output terminal of the control chip, the number of peripheral components of the application circuit can also be reduced, which is beneficial to the miniaturization of the overall equipment; therefore, the present invention greatly reduces the number of peripheral components of the application circuit, which not only reduces the power consumption of the overall circuit, but also achieves a higher integration level and reduces the circuit cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a circuit diagram of a lighting control system based on an infrared sensor provided by an embodiment of the present invention;

[0020] Figure 2 FIG. 1 is a schematic diagram of the structure of a control chip provided by an embodiment of the present invention;

[0021] Figure 3 FIG. 1 is a schematic diagram of the structure of a digital signal processing module provided by an embodiment of the present invention;

[0022] Figure 4 The figure is a schematic flow chart of a control method based on an infrared sensor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] Embodiment 1

[0025] Figure 1 FIG. 1 is a circuit diagram of a lighting control system based on an infrared sensor provided by an embodiment of the present invention. Figure 1 As shown, the infrared sensor-based lighting control system provided in this embodiment specifically includes:

[0026] Infrared sensor T, control chip U, first resistor R1 and light emitting diode LED;

[0027] The output end of the infrared sensor T is connected to the data communication end of the control chip U, and is used to collect current infrared data, and generate current message data from the current infrared data and send it to the control chip U;

[0028] The power supply end of the control chip U is connected to the power supply module, the LDO output end of the control chip U is connected to the power supply end of the infrared sensor T, the output end of the control chip U is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the cathode of the light emitting diode LED, and the anode of the light emitting diode LED is connected to the power supply end of the control chip U;

[0029] When the control chip U is in a working state, the control chip U is used to provide a working voltage for the infrared sensor T, and is also used to perform data processing according to the current message data to obtain target infrared data, and is also used to generate a corresponding target control signal according to the target infrared data, so that the target control signal drives the light-emitting diode LED to light up or turn off.

[0030] The technical principle of the infrared sensor-based lighting control system provided in this embodiment is: when the control chip is in working state, the control chip converts the electric energy of the power module into an operating voltage matching the infrared sensor to provide electric energy for the infrared sensor; the infrared sensor generates current message data from the currently collected infrared data and sends it to the control chip, and the control chip processes the current message data and generates a corresponding target control signal to drive the light-emitting diode to light up or go out.

[0031] It should be noted that the target infrared data includes first target infrared data indicating the presence of people and second target data indicating the presence of no one, and the target control signal includes a first target control signal matching the first target infrared data and a second target control signal matching the second target data. When the control chip parses the current infrared data as the first target infrared data, it outputs the first target control signal, that is, a low level, to the cathode of the light-emitting diode, thereby lighting up the light-emitting diode; when the control chip parses the current infrared data as the second target infrared data, it outputs the second target control signal, that is, a high level, to the cathode of the light-emitting diode, thereby turning off the light-emitting diode.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The control chip of the present invention can be integrated with a linear voltage regulator module, which is connected to the positive power supply terminal of the infrared sensor through the LDO output terminal, so as to provide a stable operating voltage for the infrared sensor and ensure its normal operation. Compared with the prior art that uses an external power supply module to provide power to the infrared sensor, the number of peripheral components of the application circuit can be reduced, the cost is reduced, and it is beneficial to the miniaturization of the overall equipment; the control chip of the present invention can be integrated with a power MOSFET drive module to meet the driving needs of the lighting equipment. Compared with the structure of connecting an independent drive device to the output terminal of the control chip, the number of peripheral components of the application circuit can also be reduced, which is beneficial to the miniaturization of the overall equipment; therefore, the present invention greatly reduces the number of peripheral components of the application circuit, which not only reduces the power consumption of the overall circuit, but also achieves a higher integration level and reduces the circuit cost.

[0034] Embodiment 2

[0035] like Figure 1 As shown, the lighting control system provided by the embodiment of the present invention further includes:

[0036] Voltage divider resistor R2 and photoresistor R3;

[0037] The first end of the voltage-dividing resistor R2 is connected to the power supply end of the control chip U, the second end of the voltage-dividing resistor R2 is connected to the first end of the photoresistor R3, the second end of the photoresistor R3 is grounded, and the first end of the photoresistor R3 is also connected to the photosensitive control end of the control chip U. When the photosensitive control end of the control chip receives a high level, the control chip U is triggered to be in the working state.

[0038] In practical applications, in order to achieve the energy-saving purpose of the lighting control system, the working state of the current lighting control system is controlled by detecting and judging the light intensity of the external natural light; the photoresistor R3 in this embodiment converts the intensity of natural light into corresponding resistance, and through the voltage division of the voltage divider resistor R2, the photosensitive control end of the control chip receives the corresponding voltage signal, if the voltage signal is at a high level, the control chip is triggered to be in a working state, and if the voltage signal is at a low level, the control chip is triggered to be in a sleep state, thereby realizing that the entire lighting control system is in a sleep or working state.

[0039] In an embodiment of the present invention, the lighting control system also includes: a first capacitor C1, a first end of the first capacitor C1 is connected to the anode of the light emitting diode LED, and a second end of the first capacitor C1 is grounded; a second capacitor C2, a first end of the second capacitor C2 is connected to the first end of the first capacitor C1, and a second end of the second capacitor C2 is grounded; a third capacitor C3, a first end of the third capacitor C3 is connected to the LDO output end of the control chip U, and a second end of the third capacitor C3 is grounded.

[0040] Embodiment 3

[0041] Figure 2 FIG. 1 is a schematic diagram of a control chip structure provided by an embodiment of the present invention. Figure 2 As shown, the control chip provided in this embodiment includes:

[0042] A data communication module, connected to the infrared sensor, for receiving current message data sent by the infrared sensor;

[0043] A digital signal processing module, connected to the data communication module, for performing data separation on the current message data to obtain current infrared data;

[0044] The digital signal processing module is also used to filter the current infrared data to obtain target infrared data;

[0045] The dynamic threshold judgment module is connected to the digital signal processing module and is used to compare the target infrared data with the current trigger threshold and send a corresponding target control signal according to the comparison result.

[0046] Figure 3 FIG. 1 is a schematic diagram of the structure of a digital signal processing module provided in an embodiment of the present invention; the digital signal processing module provided in this embodiment specifically includes:

[0047] A data separation module, connected to the data communication module, is used to separate the current message data and obtain a specific header code, source infrared data and a specific tail code in the current message data;

[0048] A specific code verification module, connected to the data separation module, for verifying the specific header code and the specific tail code according to a preset verification rule;

[0049] In an embodiment of the present invention, the digital signal processing module further includes: a filtering module connected to the specific code checking module and configured to filter the current infrared data.

[0050] In an embodiment of the present invention, the filtering module includes: a limiting filtering module, connected to the specific code verification module, for performing limiting filtering on the current infrared data; a sliding average filtering module, connected to the limiting filtering module, for filtering the current infrared data according to the sliding average to obtain the target infrared data.

[0051] In an embodiment of the present invention, the control chip further includes: a linear regulator module, connected to the power supply terminal of the infrared sensor, used to convert the output voltage of the power supply module into an operating voltage matching the infrared sensor, and provide electrical energy for the infrared sensor. An oscillator, used to provide a clock signal for the data communication module, the digital signal processing module and the dynamic threshold judgment module. An output drive module, wherein the output drive module is a power MOS tube, the gate of the power MOS tube is connected to the output terminal of the dynamic threshold judgment module, the source of the power MOS tube is grounded, and the drain of the power MOS tube is the output terminal of the control chip.

[0052] It should be noted that the integrated circuit module inside the control chip provided in this embodiment is as follows Figure 2 and Figure 3 As shown, it specifically includes a data communication module, a digital signal processing module, a dynamic threshold judgment module, a linear regulator module, an oscillator module, a bandgap reference module, a photosensitive signal detection module, and an output drive module, and the chip pin description is shown in the following table:

[0053] Pin Number Pin Marking Pin Name Input / Output describe 1 LDO_OUT LDO output OUTPUT LDO output. 2 GND Ground terminal INOUT Chip ground. 3 PIR Data communication terminal INOUT Data communication interface. 4 led Output OUTPUT Chip trigger signal, NMOS open-drain output. 5 CDS Photosensitive control terminal INPUT External photosensitive element. 6 VDD Power supply INOUT Chip power supply.

[0054] In this embodiment, the output of the linear regulator module is connected to the chip pin LDO_OUT, and the external output voltage is not lower than the minimum normal working voltage of the pyroelectric infrared sensor; the oscillator module is used to provide clock signals for each module inside the integrated circuit; the bandgap reference module is used to provide reference current and reference voltage to each internal module; the photosensitive signal detection module is used to detect the voltage of the photosensitive control pin CDS, and the output result of this module will simultaneously determine the working state of the oscillator and the digital circuit part; the chip digital circuit part includes three modules: data communication, digital signal processing, and dynamic threshold judgment; the output drive module receives the result of the dynamic threshold judgment module, connects the power drive MOSFET gate, and is connected to the chip external pin LED through the MOSFET drain, which can be used to directly drive the lighting equipment to ensure that a sufficiently large output current is provided; the data communication end of the chip is directly connected to the data communication end of the pyroelectric infrared sensor, and can read the data output by the latter's internal analog-to-digital converter in a specific timing and format; the corresponding control functions that can be realized by the dynamic threshold judgment module inside the chip include: a certain single trigger holding time, a blocking time setting, a repeated trigger mode setting, and automatic adjustment of the dynamic threshold.

[0055] In an embodiment of the present invention, the linear voltage regulator module, output drive module, and digital signal processing module integrated inside the control chip can ensure that a stable power supply is provided to the pyroelectric infrared sensor, drive the lighting device with a large current, and realize dynamic threshold adjustment, while also significantly reducing the number of peripheral components of the application circuit and reducing costs.

[0056] Embodiment 4

[0057] Figure 4 FIG. 1 is a flow chart of a control method based on an infrared sensor provided by an embodiment of the present invention. Figure 1 As shown, when applied to the control chip of the lighting control system, the infrared sensor-based control method provided in this embodiment specifically includes the following steps:

[0058] Step S101, when the control chip is in working state, receiving current message data sent by the infrared sensor.

[0059] Step S102, performing data separation on the current message data to obtain current infrared data.

[0060] Specifically, the current message data is separated into data to obtain the current infrared data, including: separating the current message data into data to obtain a specific header code, source infrared data and a specific tail code in the current message data; verifying the specific header code and the specific tail code according to a preset verification rule; when the verification of the specific header code and the specific tail code is successful, using the source infrared data as the current infrared data.

[0061] Step S103, filtering the current infrared data to obtain target infrared data.

[0062] Specifically, the current infrared data is filtered to obtain target infrared data, including: obtaining the difference between the previous infrared data and the current infrared data; judging whether the difference is less than or equal to a preset maximum deviation value; when the difference is less than or equal to the preset maximum deviation value, using the current infrared data as the target infrared data.

[0063] Furthermore, when the difference is less than or equal to the preset maximum deviation value, the method further includes: filtering the current infrared data according to a sliding average value to obtain the target infrared data.

[0064] Step S104, comparing the target infrared data with the current trigger threshold, and sending a corresponding target control signal to the light emitting diode according to the comparison result, so that the target control signal drives the light emitting diode to light up or turn off.

[0065] It should be noted that the data communication module transmits signals to the data communication end of the pyroelectric infrared sensor according to the required timing. The internal filter of the sensor processes the infrared data for the first time and then outputs it. The output data is output in the form of serial code according to the aforementioned timing, thereby achieving the purpose of transmitting timing signals and receiving data signals on a single communication line.

[0066] The digital signal processing module is connected to the data communication module, and the data processing process specifically includes:

[0067] The first step is to perform timing analysis on the serial data collected by the data communication module to separate the specific header code + infrared data + specific tail code;

[0068] The second step is to check the header and tail codes. Once the verification is passed, the third step is performed, otherwise the data is discarded.

[0069] In the third step, each time a new verified data is obtained, the maximum deviation value is judged with the previous verified data. If it is within the maximum deviation value range, the new value is retained. Otherwise, the current value is determined to be an abnormal value and directly discarded, that is, the infrared data is processed twice by the limiting filter method, and the retained data is transferred to the fourth step for processing;

[0070] The fourth step is to establish a data buffer inside the chip, store N data after limiting filtering in sequence, and calculate the arithmetic mean of N data including new data, that is, process the infrared data three times by the sliding average filtering method, and the obtained new average value is propagated to the dynamic threshold judgment module.

[0071] The dynamic threshold judgment module is connected to the digital signal processing module. According to the numerical value of the arithmetic mean output after the fourth step of the digital signal processing module and combined with the current circuit state, the trigger threshold is dynamically adjusted to ensure that the chip has an absolute sensitivity advantage and improves the trigger reliability.

[0072] In an embodiment of the present invention, before comparing the target infrared data with the current trigger threshold, the method further includes: acquiring a current control state of the lighting control system; and dynamically adjusting the current trigger threshold according to the current control state.

[0073] It should be noted that the dynamic threshold judgment module of the control chip sets different thresholds according to the current circuit state to avoid false triggering caused by excessive fluctuations in sensor output data due to electrical signal fluctuations caused by the trigger state.

[0074] The dynamic setting of the threshold is as follows:

[0075] ① When the chip is powered on normally, the threshold is set to single basic threshold Dth;

[0076] ② When the digital signal processing module detects abnormal data: within two seconds after the abnormal data appears, the dynamic threshold judgment module enters the blocking state and does not perform threshold judgment; from the beginning of the third second to the end of the fourth second after the abnormal data appears, the threshold is set to three times the basic threshold (3*Dth); from the beginning of the fifth second to the end of the sixth second after the abnormal data appears, the threshold is set to two times the basic threshold (2*Dth); six seconds after the abnormal data appears, the threshold is restored to single basic threshold Dth;

[0077] ③ When the trigger is valid and the light is on: within four seconds, the dynamic threshold judgment module enters the blocking state and does not perform threshold judgment; four seconds after the light is on, the threshold is set to twice the basic threshold (2*Dth). If the data sent by the data signal processing module does not reach twice the basic threshold (2*Dth) within the time set inside the chip (tdelay-4 seconds), this trigger ends after (tdelay-4 seconds), otherwise it continues to be triggered repeatedly.

[0078] ④ When the trigger ends and the light goes out: within two seconds, the dynamic threshold judgment module enters the blocking state and does not perform threshold judgment; from the beginning of the third second to the end of the fourth second after the light goes out, the threshold is set to three times the basic threshold (3*Dth); from the beginning of the fifth second to the end of the sixth second after the light goes out, the threshold is set to twice the basic threshold (2*Dth); after six seconds after the light goes out, the threshold returns to the single basic threshold Dth.

[0079] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0080] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A lighting control system based on infrared sensors, characterized in that: The lighting control system comprises: Infrared sensor, control chip, first resistor, light emitting diode and power module; The output end of the infrared sensor is connected to the data communication end of the control chip, and is used to collect current infrared data, and generate current message data from the current infrared data and send it to the control chip; The power supply terminal of the control chip is connected to the power supply module, the LDO output terminal of the control chip is connected to the power supply terminal of the infrared sensor, the output terminal of the control chip is connected to the first end of the first resistor, the second end of the first resistor is connected to the cathode of the light emitting diode, and the anode of the light emitting diode is connected to the power supply terminal of the control chip; When the control chip is in working state, the control chip is used to provide working voltage for the infrared sensor, and is also used to perform data processing according to the current message data to obtain target infrared data, and is also used to generate a corresponding target control signal according to the target infrared data, so that the target control signal drives the light emitting diode to light up or turn off; The control chip comprises: A data communication module, connected to the infrared sensor, for receiving current message data sent by the infrared sensor; A digital signal processing module, connected to the data communication module, for performing data separation on the current message data to obtain current infrared data; The digital signal processing module is also used to filter the current infrared data to obtain target infrared data; A dynamic threshold judgment module, connected to the digital signal processing module, is used to compare the target infrared data with the current trigger threshold and send a corresponding target control signal according to the comparison result; The digital signal processing module comprises: A data separation module, connected to the data communication module, is used to separate the current message data and obtain a specific header code, source infrared data and a specific tail code in the current message data; A specific code verification module, connected to the data separation module, for verifying the specific header code and the specific tail code according to a preset verification rule; The amplitude limiting filter module is connected to the specific code verification module and is used for performing amplitude limiting filtering on the current infrared data.

2. The infrared sensor-based lighting control system according to claim 1, characterized in that: The lighting control system further comprises: Voltage divider resistor and photoresistor; The first end of the voltage-dividing resistor is connected to the power supply end of the control chip, the second end of the voltage-dividing resistor is connected to the first end of the photoresistor, the second end of the photoresistor is grounded, and the first end of the photoresistor is also connected to the photosensitive control end of the control chip. When the photosensitive control end of the control chip receives a high level, the control chip is triggered to be in the working state.

3. The infrared sensor-based lighting control system according to claim 1, characterized in that: The digital signal processing module also includes: The sliding average filtering module is connected to the limiting filtering module and is used to filter the current infrared data according to the sliding average value to obtain the target infrared data.

4. A control method for the infrared sensor-based lighting control system according to claim 1, characterized in that: The control chip applied to the lighting control system, the method comprising: When the control chip is in working state, receiving current message data sent by the infrared sensor; Separating the current message data to obtain the current infrared data; Filtering the current infrared data to obtain target infrared data; Compare the target infrared data with the current trigger threshold, and send a corresponding target control signal to the light emitting diode according to the comparison result, so that the target control signal drives the light emitting diode to light up or turn off; Separating the current message data to obtain the current infrared data includes: Performing data separation on the current message data to obtain a specific header code, source infrared data and a specific tail code in the current message data; Verifying the specific header code and the specific tail code according to a preset verification rule; When the verification of the specific header code and the specific tail code succeeds, the source infrared data is used as the current infrared data.

5. The control method of the infrared sensor-based lighting control system according to claim 4, characterized in that: Filtering the current infrared data to obtain target infrared data includes: Get the difference between the previous infrared data and the current infrared data; Determining whether the difference is less than or equal to a preset maximum deviation value; When the difference is less than or equal to the preset maximum deviation value, the current infrared data is used as the target infrared data.

6. The control method of the lighting control system based on infrared sensor according to claim 5, characterized in that: When the difference is less than or equal to the preset maximum deviation value, the method further includes: The current infrared data is filtered according to the sliding average to obtain the target infrared data.

7. The control method of the infrared sensor-based lighting control system according to any one of claims 4 to 6, characterized in that: Before comparing the target infrared data with the current trigger threshold, the method further includes: Acquire the current control state of the lighting control system; The current trigger threshold is dynamically adjusted according to the current control state.

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