A PIR control circuit, device and control method resistant to light interference

Abstract

The application discloses an anti-light-interference PIR control circuit, device and control method, which comprises a control module, a power module, an LED driving module, a frequency flash removing module, a PIR sensing module, a switch control module, a light sensing module and an LED interface control module; the control module is electrically connected with the power module, the LED driving module, the frequency flash removing module, the PIR sensing module, the switch control module, the light sensing module and the LED interface control module; the power module is electrically connected with the LED driving module, the frequency flash removing module, the PIR sensing module, the switch control module, the light sensing module and the LED interface control module; the LED driving module is electrically connected with the frequency flash removing module and the LED interface control module, and the frequency flash removing module is electrically connected with the LED interface control module. The application can realize LED frequency flash removing control and high-PF LED driving control, and has the advantages of low cost, high PF and anti-light-interference.

Description

Technical Field

[0001] This invention relates to the field of lighting control technology, and in particular to a PIR control circuit, device, and control method that resists light interference. Background Technology

[0002] Power factor (PF) is the cosine of the phase difference between the input voltage and the input current. A low PF will increase the power grid losses. Efficiency is the ratio of the output power to the input power of a power supply. Low efficiency will increase the power supply losses.

[0003] Generally, LED motion sensor lights utilize the thermal infrared radiation emitted by humans. A motion sensor element in the lamp head focuses this radiation onto the surface of the sensor through a circular Fresnel filter, generating an electrical signal. This signal is then processed and analyzed by a signal processing module, a delay switch module, and a light sensing module to determine whether the motion sensor light should be turned on or off based on the detected value. However, most existing LED motion sensor light solutions have excessively low power factor (PF) values, increasing power grid losses. Furthermore, these solutions filter light interference by using infrared photosensitive devices to distinguish between natural light and LED-emitted light, which is costly and inconvenient for production and testing. Therefore, inventing a high PF, low flicker PIR control circuit with strong light interference resistance is a problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a PIR control circuit, device, and control method that resists light interference. In this solution, the LED driving module performs high PF linear driving on the LED; the anti-flicker module performs anti-flicker operation on the LED; the switch control module controls the working state of the PIR sensing module or the light sensing module; the light sensing module detects light detection signals; the PIR sensing module detects human body sensing signals, and when the human body sensing signal is detected, the control module controls the LED to light up. Thus, this application can achieve LED anti-flicker control and high PF LED driving control, and has the advantages of low cost, high PF, and resistance to light interference.

[0005] To solve the above-mentioned technical problems, this application provides a PIR control circuit that resists light interference, including a control module, a power supply module, an LED driver module, a flicker removal module, a PIR sensing module, a switch control module, a light sensing module, and an LED interface control module; The control module is electrically connected to the power module, the LED driver module, the flicker removal module, the PIR sensing module, the switch control module, the light sensing module, and the LED interface control module, respectively. The power supply module is electrically connected to the LED driver module, the flicker removal module, the PIR sensing module, the switch control module, the light sensing module, and the LED interface control module, respectively. The LED driver module is electrically connected to both the flicker removal module and the LED interface control module, and the flicker removal module is electrically connected to the LED interface control module.

[0006] Preferably, the LED driving module includes an LED interface unit, a brightness control unit, and an LED linear driving unit; The LED interface unit is electrically connected to the LED lamp, the brightness control unit is electrically connected to both the LED linear drive unit and the LED interface unit, and the LED linear drive unit is electrically connected to the power module.

[0007] Preferably, the LED linear driving unit includes a first LED linear driving subunit, a second LED linear driving subunit, and a third LED linear driving subunit; The first LED linear driving subunit is electrically connected to the power module and the brightness control unit respectively; the second LED linear driving subunit is electrically connected to the power module and the brightness control unit respectively; the third LED linear driving subunit is electrically connected to the power module and the brightness control unit respectively; the second LED linear driving subunit is electrically connected to the third LED linear driving subunit.

[0008] Preferably, the flicker removal module includes a linear voltage regulator unit and an isolation control unit; The linear voltage regulator and the isolation control unit are both electrically connected to the control module. The power supply module is electrically connected to both the linear voltage regulator and the isolation control unit. The isolation control unit is electrically connected to both the control module and the LED light.

[0009] Preferably, the isolation control unit includes an optocoupler, a first MOSFET, a second MOSFET, a first diode, a second diode, and a third diode; The first end of the optocoupler is electrically connected to the control module, the second end of the optocoupler is grounded, the third end of the optocoupler is electrically connected to the gate of the first MOS transistor and the cathode of the first diode, the anode of the first diode is electrically connected to the source of the first MOS transistor, the fourth end of the optocoupler and the LED driver module, the drain of the first MOS transistor is electrically connected to the negative terminal of the LED and the source of the second MOS transistor, the gate of the second MOS transistor is electrically connected to the LED driver module, the fourth end of the optocoupler and the anode of the second diode, the cathode of the second diode is electrically connected to the cathode of the third diode, and the anode of the third diode is electrically connected to the drain of the first MOS transistor, the drain of the second MOS transistor and the negative terminal of the LED.

[0010] Preferably, the brightness control unit includes a third MOSFET, a fourth diode, and a fifth diode; The gate of the third MOS transistor is electrically connected to the LED interface unit, and the drain of the third MOS transistor is electrically connected to the LED linear driving unit, the cathode of the fourth diode, and the cathode of the fifth diode, respectively. The anode of the fourth diode, the anode of the fifth diode, and the source of the third MOS transistor are grounded.

[0011] Preferably, the switch control module includes a three-position miniature toggle switch, a first resistor, a second resistor, and a first capacitor; The first terminal of the three-position miniature toggle switch is electrically connected to the first terminal of the first resistor, the first terminal of the second resistor, and the first terminal of the first capacitor, respectively. The second terminal of the three-position miniature toggle switch and the second terminal of the first capacitor are grounded. The second terminal of the first resistor is electrically connected to the power module. The second terminal of the second resistor is electrically connected to the third terminal of the three-position miniature toggle switch. The second terminal of the three-position miniature toggle switch is electrically connected to the control module.

[0012] Preferably, the photosensitive module includes a photodiode, a third resistor, and a second capacitor; The first end of the third resistor is electrically connected to the power module, and the second end of the third resistor is electrically connected to the control module, the cathode of the photodiode, and the first end of the second capacitor, respectively. The anode of the photodiode and the second end of the second capacitor are grounded.

[0013] To address the aforementioned technical problems, this application provides a PIR control device resistant to light interference, including the aforementioned PIR control circuit resistant to light interference.

[0014] To address the aforementioned technical problems, this application provides a PIR control method for resisting optical interference, applied to the aforementioned PIR control circuit for resisting optical interference. The control method includes... The LED driver module is controlled to provide high power value linear LED drive for the LED lamp; The anti-flicker module is controlled to perform anti-flicker operation on the LED light; The toggle control signal of the switch control module is obtained, and the working state of the PIR sensing module or the light sensing module is controlled according to the toggle control signal; wherein, the working state includes: both the PIR sensing module and the light sensing module are effective, both the PIR sensing module and the light sensing module are ineffective, and only the PIR sensing module is effective; The light detection signal of the light sensing module is obtained, and the light intensity value is determined based on the light detection signal; When the light intensity value is greater than a preset threshold, the LED light is locked. When the light intensity value is less than a preset threshold, the LED light is controlled to standby mode; In standby mode, the PIR sensing module is controlled to detect human body sensing signals, and when the human body sensing signals are detected, the LED light is controlled to turn on.

[0015] The PIR control circuit, device, and control method for resisting light interference disclosed in this invention have the following beneficial effects. The PIR control circuit for resisting light interference disclosed in this invention includes: a control module, a power supply module, an LED driver module, a flicker removal module, a PIR sensing module, a switch control module, a light sensing module, and an LED interface control module; the control module is electrically connected to the power supply module, the LED driver module, the flicker removal module, the PIR sensing module, the switch control module, the light sensing module, and the LED interface control module; the power supply module is electrically connected to the LED driver module, the flicker removal module, the PIR sensing module, the switch control module, the light sensing module, and the LED interface control module; the LED driver module is electrically connected to the flicker removal module and the LED interface control module; and the flicker removal module is electrically connected to the LED interface control module. The LED driving module provides high power factor (PF) linear drive for the LED; the flicker-reducing module performs flicker-reducing operation on the LED; the switch control module controls the operating state of the PIR sensing module or the light sensing module; the light sensing module detects light detection signals; the PIR sensing module detects human body detection signals, and when the human body detection signal is detected, the control module controls the LED to light up. Therefore, this invention can achieve LED flicker-reducing control and high PF LED driving control, with advantages of low cost, high PF, and resistance to light interference. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort: Figure 1 This is a schematic block diagram of a PIR control circuit for resisting light interference according to a preferred embodiment of the present invention. Figure 2 This is a schematic block diagram of a PIR control circuit for resisting light interference according to a preferred embodiment of the present invention. Figure 3 This is a circuit diagram of an LED driver module of a PIR control circuit with anti-light interference according to a preferred embodiment of the present invention. Figure 4 This is a circuit diagram of an isolation control unit of a PIR control circuit for resisting light interference, according to a preferred embodiment of the present invention. Figure 5 This is a circuit diagram of a linear voltage regulator unit of a PIR control circuit with anti-optical interference according to a preferred embodiment of the present invention. Figure 6This is a circuit diagram of the switch control module of a PIR control circuit with anti-optical interference according to a preferred embodiment of the present invention. Figure 7 This is a circuit diagram of the photosensitive module of a PIR control circuit with anti-light interference according to a preferred embodiment of the present invention. Figure 8 This is a circuit diagram of a PIR sensing module of a PIR control circuit for resisting light interference, according to a preferred embodiment of the present invention. Figure 9 This is a flowchart illustrating a preferred embodiment of the PIR control method for resisting light interference according to the present invention. Detailed Implementation

[0017] The core of this application is to provide a PIR control circuit, device, and control method that resists light interference. In this solution, the LED driving module performs high PF linear driving on the LED; the anti-flicker module performs anti-flicker operation on the LED; the switch control module controls the working state of the PIR sensing module or the light sensing module; the light sensing module detects light detection signals; the PIR sensing module detects human body sensing signals, and when the human body sensing signal is detected, the control module controls the LED to light up. Thus, this application can achieve LED anti-flicker control and high PF LED driving control, with the advantages of low cost, high PF, and resistance to light interference.

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Please see Figure 1 , Figure 1 The schematic diagram of a PIR control circuit for resisting light interference provided in this application includes a control module 1, a power supply module 2, an LED driver module 3, a flicker removal module 4, a PIR sensing module 5, a switch control module 6, a light sensing module 7, and an LED interface control module 8. The control module 1 is electrically connected to the power module 2, LED driver module 3, flicker removal module 4, PIR sensor module 5, switch control module 6, light sensor module 7 and LED interface control module 8 respectively. The power module 2 is electrically connected to the LED driver module 3, the flicker removal module 4, the PIR sensing module 5, the switch control module 6, the light sensing module 7, and the LED interface control module 8, respectively. LED driver module 3 is electrically connected to flicker removal module 4 and LED interface control module 8 respectively, and flicker removal module 4 is electrically connected to LED interface control module 8.

[0020] In existing technologies, most LED human body sensor lamp solutions have excessively low power factor (PF) values, increasing power grid losses. In addition, these LED human body sensor lamp solutions filter out light interference by using infrared photosensitive devices to distinguish between natural light and light emitted by the LED, which is costly and inconvenient for production and testing.

[0021] To address the aforementioned shortcomings, this application achieves LED flicker control and high PF LED driving control through the cooperation of control module 1, power module 2, LED driver module 3, flicker removal module 4, PIR sensing module 5, switch control module 6, light sensing module 7, and LED interface control module 8. This approach offers advantages such as low cost, high PF, and resistance to light interference.

[0022] Specifically, the PIR control circuit for resisting light interference in this application is set on two circuit boards. The first is an aluminum substrate, on which a power supply module 2, an LED driver module 3, a flicker removal module 4, and heat dissipation are integrated. The second is an FR4 board, on which a PIR sensing module 5, a switch control module 6, a light sensing module 7, and an LED interface control module 8 are integrated. The aluminum substrate and the FR4 board are connected through the LED interface control module 8.

[0023] Specifically, control module 1 is configured as an MCU (Microcontroller Unit, also known as a Single-Chip Microcomputer or microcontroller, which is a central processing unit (CPU) with its frequency and specifications appropriately reduced, integrating memory, timer, USB, A / D converter, UART, PLC, DMA and other peripheral interfaces, and even LCD driver circuitry, onto a single chip to form a chip-level computer. In this embodiment, the chip model of main control module 1 can be set to NY8BE62D. In another preferred embodiment, the chip model of control module 1 is set to an MCU, FPGA or PLC controller, and the specific chip model of control module 1 is not limited.

[0024] Specifically, in this embodiment, the LED driving module 3 is used to drive the LED lamp with a high PF value; the anti-flicker module 4 performs anti-flicker operation on the LED lamp; the switch control module 6 is used to control the working state of the PIR sensing module 5 or the light sensing module 7; the light sensing module 7 detects the light detection signal; the PIR sensing module 5 detects the human body sensing signal, and when the human body sensing signal is detected, the control module 1 controls the LED lamp to light up.

[0025] In summary, this invention provides a PIR control circuit for resisting light interference. This circuit includes a control module 1, a power supply module 2, an LED driver module 3, a flicker-reducing module 4, a PIR sensing module 5, a switch control module 6, a light sensing module 7, and an LED interface control module 8. The LED driver module 3 provides high power factor (PF) linear drive for the LED; the flicker-reducing module 4 performs flicker-reducing operation on the LED; a toggle control signal controls the operating state of the PIR sensing module 5 or the light sensing module 7; the light sensing module 7 detects a light detection signal; the PIR sensing module 5 detects a human body sensor signal, and when a human body sensor signal is detected, the control module 1 controls the LED to light up. Therefore, this application can achieve LED flicker-reducing control and high PF LED drive control, offering advantages such as low cost, high PF, and resistance to light interference.

[0026] Based on the above embodiments: Please refer to Figure 2 , Figure 2 This is a schematic block diagram of a PIR control circuit for resisting light interference provided in this application.

[0027] Please refer to Figure 3 , Figure 3 The circuit schematic diagram of an LED driver module provided in this application.

[0028] In one preferred embodiment, the LED driving module 3 includes an LED interface unit 31, a brightness control unit 32, and an LED linear driving unit 33; The LED interface unit 31 is electrically connected to the LED lamp, the brightness control unit 32 is electrically connected to the LED linear drive unit 33 and the LED interface unit 31 respectively, and the LED linear drive unit 33 is electrically connected to the power module 2.

[0029] Specifically, the LED interface unit 31 is used to connect to the LED lamp, the brightness control unit 32 is used to adjust the brightness of the LED lamp, and the LED linear drive unit 33 is used to drive the LED lamp to work, obtain the expected brightness requirements, and ensure the consistency of brightness and color of each LED.

[0030] In a preferred embodiment, the LED linear driving unit 33 includes a first LED linear driving subunit 331, a second LED linear driving subunit 332, and a third LED linear driving subunit 333; The first LED linear driving subunit 331 is electrically connected to the power module 2 and the brightness control unit 32 respectively; the second LED linear driving subunit 332 is electrically connected to the power module 2 and the brightness control unit 32 respectively; the third LED linear driving subunit 333 is electrically connected to the power module 2 and the brightness control unit 32 respectively; the second LED linear driving subunit 332 and the third LED linear driving subunit 333 are electrically connected.

[0031] Specifically, the first LED linear drive subunit 331, the second LED linear drive subunit 332, and the third LED linear drive subunit 333 work together to provide constant current linear drive for the LED lamp and effectively protect the stable working state of the LED lamp.

[0032] Specifically, in this embodiment, the chip model of the first LED linear driving subunit 331, the second LED linear driving subunit 332, and the third LED linear driving subunit 333 is set to NE2530, which is a high PF value LED linear driving IC. In another preferred embodiment, the chip model of the first LED linear driving subunit 331, the second LED linear driving subunit 332, and the third LED linear driving subunit 333 can be set to another high PF value LED linear driving IC. The specific chip model of the first LED linear driving subunit 331, the second LED linear driving subunit 332, and the third LED linear driving subunit 333 is not specifically limited here.

[0033] Please refer to Figure 4 , Figure 4 The circuit diagram of an isolation control unit provided in this application.

[0034] Please refer to Figure 5 , Figure 5 The circuit diagram of a linear voltage regulator unit provided in this application.

[0035] In one preferred embodiment, the flicker removal module 4 includes a linear voltage regulator unit 41 and an isolation control unit 42; The linear voltage regulator unit 41 and the isolation control unit 42 are both electrically connected to the control module 1. The power supply module 2 is electrically connected to the linear voltage regulator unit 41 and the isolation control unit 42 respectively. The isolation control unit 42 is electrically connected to the control module 1 and the LED lamp respectively.

[0036] Specifically, the linear regulator unit 41 is used to provide a reliable power input to the LED driver module 3. In this embodiment, the linear regulator unit 41 is implemented using the SGM2203 chip. The specific circuit structure of the linear regulator unit 41 can be found in [reference needed]. Figure 4 This will not be elaborated upon here.

[0037] Specifically, the flickering of LED lights is caused by changes in the LED's operating voltage. When the LED voltage increases, the LED will flicker, and when the voltage decreases, the LED will stop flickering. Therefore, the isolation control unit 42 is used to stabilize the LED's operating voltage to achieve the effect of eliminating flicker.

[0038] In one preferred embodiment, the isolation control unit 42 includes an optocoupler U5, a first MOSFET Q1, a second MOSFET Q4, a first diode ZD7, a second diode ZD6, and a third diode ZD5; The first terminal of optocoupler U5 is electrically connected to control module 1, the second terminal of optocoupler U5 is grounded, the third terminal of optocoupler U5 is electrically connected to the gate of the first MOSFET Q1 and the cathode of the first diode ZD7, the anode of the first diode ZD7 is electrically connected to the source of the first MOSFET Q1, the fourth terminal of optocoupler U5 and LED driver module 3, the drain of the first MOSFET Q1 is electrically connected to the negative terminal of the LED and the source of the second MOSFET Q4, the gate of the second MOSFET Q4 is electrically connected to LED driver module 3, the fourth terminal of optocoupler U5 and the anode of the second diode ZD6, the cathode of the second diode ZD6 is electrically connected to the cathode of the third diode ZD5, and the anode of the third diode ZD5 is electrically connected to the drain of the first MOSFET Q1, the drain of the second MOSFET Q4 and the negative terminal of the LED.

[0039] Specifically, in Figure 4 In the process, current flows through resistor R27 to charge capacitor C11. There is a phase shift between the voltage of LED+ and the voltage of C11; when the LED+ voltage is high, the voltage of capacitor C11 is low, and vice versa. When the voltage of capacitor C11 is charged to the point where the second MOSFET Q4 just turns on, Q4 operates in amplification mode. Current flows through Q4, but does not charge capacitor C11, causing C11 to begin discharging. Q4 gradually turns off. This cycle repeats, keeping Q4 in a linear amplification state, thus controlling the voltage distribution across Q4. The diode maintains a voltage difference; due to the phase shift between capacitor C11 and LED+, the DS voltage difference of the second MOSFET Q4 is directly proportional to the voltage level of LED+; this filters out the voltage peak on the LED and reduces flicker; the second diode ZD6 is used as a loss limiting device for the second MOSFET Q4 to prevent the voltage of resistor R27 from being too high, which would cause the DS voltage of the second MOSFET Q4 to be too high; the third diode ZD5 is used to prevent capacitor C11 from discharging rapidly through the circuit of the second diode ZD6, limiting capacitor C11 to discharge only through resistors R27 and R26.

[0040] In one preferred embodiment, the brightness control unit 32 includes a third MOSFET Q3, a fourth diode ZD3, and a fifth diode ZD4; The gate of the third MOSFET Q3 is electrically connected to the LED interface unit 31. The drain of the third MOSFET Q3 is electrically connected to the LED linear drive unit 33, the cathode of the fourth diode ZD3, and the cathode of the fifth diode, respectively. The anode of the fourth diode ZD3, the anode of the fifth diode ZD4, and the source of the third MOSFET Q3 are grounded.

[0041] Specifically, in this embodiment, the fourth diode ZD3 and the fifth diode ZD4 are used to provide overvoltage protection for the drain and source terminals of the third MOSFET Q3. Dimming is achieved by controlling the switching on and off of the third MOSFET Q3 via PWM. When the third MOSFET Q3 is on, U1, U2, and U4 operate; when the third MOSFET Q3 is off, U1, U2, and U4 do not operate. U1, U2, and U4 are used to control the on / off state of the LED. When operating, the LED is on; when not operating, the LED is off. Therefore, this application achieves dimming by periodically controlling the on / off state of the LED.

[0042] Please refer to Figure 6 , Figure 6 The circuit diagram of a switch control module provided in this application.

[0043] In a preferred embodiment, the switch control module 6 includes a three-position miniature toggle switch KEYA2, a first resistor RA5, a second resistor RA6, and a first capacitor CA1; The first terminal of the three-position miniature toggle switch KEYA2 is electrically connected to the first terminal of the first resistor RA5, the first terminal of the second resistor RA6, and the first terminal of the first capacitor CA1. The second terminal of the three-position miniature toggle switch KEYA2 and the second terminal of the first capacitor CA1 are grounded. The second terminal of the first resistor RA5 is electrically connected to the power module 2. The second terminal of the second resistor RA6 is electrically connected to the third terminal of the three-position miniature toggle switch KEYA2. The second terminal of the three-position miniature toggle switch KEYA2 is electrically connected to the control module 1.

[0044] Specifically, in this embodiment, when the three-position micro toggle switch KEYA2 is switched to the middle position, both the PIR sensing module 5 and the light sensing module 7 are disabled (pin 7 voltage 3.3V); when the three-position micro toggle switch KEYA2 is switched to the right position (pin 4), both the PIR sensing module 5 and the light sensing module 7 are enabled (pin 7 voltage 1.75V); when the three-position micro toggle switch KEYA2 is switched to the left position (pin 1), the light sensing module 7 is shielded, and the PIR sensing module 5 is enabled (pin 7 voltage 0V).

[0045] Specifically, when both the PIR sensor module 5 and the light sensor module 7 are ineffective, the LED light cannot activate. When both the PIR sensor module 5 and the light sensor module 7 are effective, the light sensor module 7 acquires a light detection signal and sends it to the control module 1. The control module 1 determines the light intensity value according to its internal program. If the light intensity value is greater than the preset value, the LED light is locked to save energy, avoid light interference, and improve the detection accuracy of the light sensor module 7. If the light intensity value is less than the preset value, the LED light is kept in standby mode. In standby mode, if the PIR sensor module 5 detects a human body detection signal, the control module 1 controls the LED driver module 3 to drive the LED light to operate at a constant current and controls the anti-flicker module 4 to perform anti-flicker operation on the LED light.

[0046] Please refer to Figure 7 , Figure 7 The circuit diagram of a photosensitive module provided in this application.

[0047] Please refer to Figure 8 , Figure 8 The circuit schematic diagram of a PIR sensing module provided in this application.

[0048] In a preferred embodiment, the photosensitive module 7 includes a photodiode DA1, a third resistor RA4, and a second capacitor CA4; The first end of the third resistor RA4 is electrically connected to the power module 2. The second end of the third resistor RA4 is electrically connected to the control module 1, the cathode of the photodiode DA1, and the first end of the second capacitor CA4. The anode of the photodiode DA1 and the second end of the second capacitor are grounded.

[0049] Specifically, in this embodiment, the photodiode DA1 is used to detect light intensity.

[0050] In a preferred embodiment, the PIR sensing module includes an infrared sensor connector PIR, a fourth resistor RA2, and a fifth resistor RA3. The first end of the infrared sensor connector PIR is electrically connected to the power module, the second end of the infrared sensor connector PIR is electrically connected to the first end of the fourth resistor RA2, the second end of the fourth resistor RA2 is electrically connected to the control module 1 and the first end of the fifth resistor RA3, the second end of the fifth resistor RA3 is grounded, and the third end of the infrared sensor connector PIR is grounded.

[0051] This application also provides a PIR control device that resists light interference, including a PIR control circuit that resists light interference.

[0052] Please refer to Figure 9 , Figure 9 This is a flowchart illustrating a PIR control method for resisting light interference provided in this application.

[0053] This application also provides a PIR control method for resisting light interference, applied to a PIR control circuit for resisting light interference, the control method including: S1. Control the LED driver module 3 to perform high PF value linear LED driving on the LED lamp; S2, control the anti-flicker module 4 to perform anti-flicker action on the LED lights; S3. Obtain the toggle control signal from the switch control module 6, and control the working state of the PIR sensing module 5 or the light sensing module 7 according to the toggle control signal; wherein the working state includes: both PIR sensing module 5 and light sensing module 7 are effective, both PIR sensing module 5 and light sensing module 7 are ineffective, and only PIR sensing module 5 is effective. S4. Obtain the light detection signal from the light sensor module 7, and determine the light intensity value based on the light detection signal; S5. When the light intensity value is greater than the preset threshold, the LED light will be locked. S6. When the light intensity value is less than the preset threshold, the LED light is controlled to standby mode; S7. In standby mode, control the PIR sensing module 5 to detect human body sensing signals, and control the LED light to turn on when a human body sensing signal is detected.

[0054] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PIR control circuit for resisting light interference, characterized in that, It includes a control module, a power supply module, an LED driver module, a flicker removal module, a PIR sensor module, a switch control module, a light sensor module, and an LED interface control module; The control module is electrically connected to the power module, the LED driver module, the flicker removal module, the PIR sensing module, the switch control module, the light sensing module, and the LED interface control module, respectively. The power supply module is electrically connected to the LED driver module, the flicker removal module, the PIR sensing module, the switch control module, the light sensing module, and the LED interface control module, respectively. The LED driver module is electrically connected to the flicker removal module and the LED interface control module respectively, and the flicker removal module is electrically connected to the LED interface control module; The LED driving module includes an LED interface unit, a brightness control unit, and an LED linear driving unit. The LED interface unit is electrically connected to the LED lamp, the brightness control unit is electrically connected to both the LED linear drive unit and the LED interface unit, and the LED linear drive unit is electrically connected to the power module. The LED linear driving unit includes a first LED linear driving subunit, a second LED linear driving subunit, and a third LED linear driving subunit; The first LED linear driving subunit is electrically connected to the power module and the brightness control unit respectively; the second LED linear driving subunit is electrically connected to the power module and the brightness control unit respectively; the third LED linear driving subunit is electrically connected to the power module and the brightness control unit respectively; the second LED linear driving subunit is electrically connected to the third LED linear driving subunit. The flicker removal module includes a linear voltage regulator unit and an isolation control unit; The linear voltage regulator and the isolation control unit are both electrically connected to the control module. The power supply module is electrically connected to both the linear voltage regulator and the isolation control unit. The isolation control unit is electrically connected to both the control module and the LED light. The isolation control unit includes an optocoupler, a first MOSFET, a second MOSFET, a first diode, a second diode, and a third diode; The first end of the optocoupler is electrically connected to the control module, the second end of the optocoupler is grounded, the third end of the optocoupler is electrically connected to the gate of the first MOS transistor and the cathode of the first diode, the anode of the first diode is electrically connected to the source of the first MOS transistor, the fourth end of the optocoupler and the LED driver module, the drain of the first MOS transistor is electrically connected to the negative terminal of the LED and the source of the second MOS transistor, the gate of the second MOS transistor is electrically connected to the LED driver module, the fourth end of the optocoupler and the anode of the second diode, the cathode of the second diode is electrically connected to the cathode of the third diode, and the anode of the third diode is electrically connected to the drain of the first MOS transistor, the drain of the second MOS transistor and the negative terminal of the LED.

2. The PIR control circuit for resisting light interference according to claim 1, characterized in that, The brightness control unit includes a third MOSFET, a fourth diode, and a fifth diode; The gate of the third MOS transistor is electrically connected to the LED interface unit, and the drain of the third MOS transistor is electrically connected to the LED linear driving unit, the cathode of the fourth diode, and the cathode of the fifth diode, respectively. The anode of the fourth diode, the anode of the fifth diode, and the source of the third MOS transistor are grounded.

3. The PIR control circuit for resisting light interference according to claim 1, characterized in that, The switch control module includes a three-position miniature toggle switch, a first resistor, a second resistor, and a first capacitor; The first terminal of the three-position miniature toggle switch is electrically connected to the first terminal of the first resistor, the first terminal of the second resistor, and the first terminal of the first capacitor, respectively. The second terminal of the three-position miniature toggle switch and the second terminal of the first capacitor are grounded. The second terminal of the first resistor is electrically connected to the power module. The second terminal of the second resistor is electrically connected to the third terminal of the three-position miniature toggle switch. The second terminal of the three-position miniature toggle switch is electrically connected to the control module.

4. The PIR control circuit for resisting light interference according to claim 1, characterized in that, The photosensitive module includes a photodiode, a third resistor, and a second capacitor; The first end of the third resistor is electrically connected to the power module, and the second end of the third resistor is electrically connected to the control module, the cathode of the photodiode, and the first end of the second capacitor, respectively. The anode of the photodiode and the second end of the second capacitor are grounded.

5. A PIR control device resistant to light interference, characterized in that, It includes a PIR control circuit for resisting light interference as described in any one of claims 1 to 4.

6. A PIR control method for resisting optical interference, characterized in that, The control method is applied to a PIR control circuit for resisting light interference as described in any one of claims 1 to 4, the control method comprising: The LED driver module is controlled to provide high power value linear LED drive for the LED lamp; The anti-flicker module is controlled to perform anti-flicker operation on the LED light; The toggle control signal of the switch control module is obtained, and the working state of the PIR sensing module or the light sensing module is controlled according to the toggle control signal; wherein, the working state includes: both the PIR sensing module and the light sensing module are effective, both the PIR sensing module and the light sensing module are ineffective, and only the PIR sensing module is effective; The light detection signal of the light sensing module is obtained, and the light intensity value is determined based on the light detection signal; When the light intensity value is greater than a preset threshold, the LED light is locked. When the light intensity value is less than a preset threshold, the LED light is controlled to standby mode; In standby mode, the PIR sensing module is controlled to detect human body sensing signals, and when the human body sensing signals are detected, the LED light is controlled to turn on.

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