Inductive control intelligent circuit for vehicle lamp

Abstract

The utility model provides an induction control intelligent circuit used for a vehicle lamp, comprising a power supply module used for providing a power supply for the whole circuit; the pyroelectric infrared sensor module is used for sensing human body infrared rays; the light control module is used for sensing the brightness of ambient light; the LED module is used for illumination; the load switch circuit is electrically connected with the LED module and is used for controlling the LED module to be connected with or disconnected from a power supply; the control module is electrically connected with the pyroelectric infrared sensor, the signal output end of the light control module and the control end of the load switch circuit, and controls the load switch circuit to be switched on or switched off according to whether the light control module senses that the ambient light brightness is lower than a critical value or not and whether the pyroelectric infrared sensor module senses human body infrared rays or not. And the LED module is further controlled to be turned on or turned off. According to the utility model, the lamp can be automatically turned on at night and in a basement, so that the timely and effective illumination is improved, and the lamp is a precedent of a two-wheeled vehicle lamp.

Description

Technical Field

[0001] The utility model relates to the technical field of two-wheeled vehicle lamps, in particular to an induction control intelligent circuit for vehicle lamps. Background Art

[0002] Two-wheeled vehicles are often used by people to commute to get off work, providing a more convenient means of transportation. The headlights of two-wheeled vehicles are an indispensable part of the vehicle. They can provide lighting needs for people driving at night and provide a great guarantee for night driving safety.

[0003] Currently, most LED lamps are simple direct lighting, lacking the necessary intelligent control. Or, if they have some intelligent control, the function is relatively simple and cannot comprehensively detect the lamp's environmental parameters, resulting in limited energy savings. Generally, LED lighting equipment operates at full capacity throughout the night, but at night, traffic is sometimes less frequent, resulting in unnecessary waste. Furthermore, prolonged full-load operation generates severe heat, greatly endangering the LED's service life. Utility Model Content

[0004] In order to overcome the above-mentioned defects in the prior art, the purpose of the present invention is to provide an intelligent circuit for induction control of vehicle lights.

[0005] In order to achieve the above-mentioned purpose of the present invention, the present invention provides an intelligent induction control circuit for vehicle lights, comprising:

[0006] Power module, providing power for the entire circuit;

[0007] Pyroelectric infrared sensor module, used to sense infrared rays from the human body;

[0008] Light control module, used to sense ambient light brightness;

[0009] LED modules for lighting;

[0010] a load switch circuit, electrically connected to the LED module, for controlling the LED module to connect or disconnect power;

[0011] The control module is electrically connected to the signal output end of the pyroelectric infrared sensor, the light control module, and the control end of the load switch circuit. According to whether the light control module senses that the ambient light brightness is lower than a critical value and whether the pyroelectric infrared sensor module senses human infrared rays, the load switch circuit is controlled to be turned on or off, thereby controlling the LED module to light up or turn off.

[0012] When the light control module senses that the ambient light brightness is lower than the critical value and the pyroelectric infrared sensor module detects the infrared signal of the human body, the control module outputs a control signal to turn on the load switch circuit and the LED module is lit; when the light control module senses that the ambient light brightness is not lower than the critical value or the pyroelectric infrared sensor module does not detect the infrared signal of the human body, the control module outputs a control signal to turn off the load switch circuit and the LED module is turned off or remains off.

[0013] Optionally, the load switch circuit includes a switching transistor, the base of which is connected to the control signal output end of the control module, the emitter of which is grounded, and the collector thereof is electrically connected to the LED module, and a twenty-first resistor is electrically connected between the emitter and base of the switching transistor.

[0014] Optionally, the light control module includes a phototransistor, the collector of the phototransistor is connected to the power module, the emitter of the phototransistor is grounded, and the photosensitive signal output end of the photosensitive signal is connected to the photosensitive signal input end of the control module.

[0015] Optionally, the power supply module includes an LDO circuit and an LDO power supply circuit;

[0016] The LDO power supply circuit is electrically connected to the power supply end of the power supply, and steps down and stabilizes the electrical signal provided by the power supply; the output end of the LDO power supply circuit is electrically connected to the input end of the LDO circuit, and the LDO circuit stabilizes and steps down the electrical signal output by the LDO power supply circuit; the output end of the LDO circuit is electrically connected to the power connection end of the control module, the pyroelectric infrared sensor module, and the light control module.

[0017] Optionally, the LDO power supply circuit includes a voltage stabilizing diode, a third diode, a first transistor, and a first filter capacitor;

[0018] The power supply end is connected to the anode of the third diode, the cathode of the third diode is connected to a voltage-dividing resistor, the other end of the voltage-dividing resistor is connected to the collector of the first transistor, and the emitter of the first transistor is connected to the input end of the LDO circuit;

[0019] The cathode of the third diode is also connected to another voltage-dividing resistor, the other end of the voltage-dividing resistor is connected to the base of the first transistor, the base of the first transistor is also connected to one end of the first filter capacitor C1 and the cathode of the voltage-stabilizing diode, and the other end of the first filter capacitor and the anode of the voltage-stabilizing diode are grounded.

[0020] Optionally, the LDO circuit includes a three-terminal voltage regulator chip;

[0021] The output end of the LDO power supply circuit is connected to the input end of the three-terminal voltage regulator chip, and the output end of the three-terminal voltage regulator chip is electrically connected to the power connection end of the pyroelectric infrared sensor module and the light control module;

[0022] A second capacitor and a third capacitor are connected in parallel between the input terminal of the three-terminal voltage stabilizing chip and the ground; a fourth capacitor and a fifth capacitor are connected in parallel between the output terminal of the three-terminal voltage stabilizing chip and the ground.

[0023] Optionally, a control module power supply filter circuit is further included, wherein the control module power supply filter circuit includes a second filter capacitor, the power connection end of the control module is electrically connected to one end of the second filter capacitor, and the other end of the second filter capacitor is grounded.

[0024] In this optional solution, the control module power supply filter circuit filters the voltage input to the control module to make it smoother.

[0025] Optionally, it further includes a signal output delay control circuit, wherein the signal output delay control circuit includes a seventh resistor and an eighth resistor connected in series between the output terminal of the power module and the ground;

[0026] The TDS timing control input terminal of the control module is electrically connected between the seventh resistor and the eighth resistor.

[0027] In this optional solution, the signal output delay control circuit delays the output signal of the control module, extending the lighting time of the LED module and further improving safety.

[0028] Optionally, it further includes an inductive sensitivity adjustment circuit, wherein the inductive sensitivity adjustment circuit includes a ninth resistor and a tenth resistor connected in series between the output terminal of the power module and the ground;

[0029] The SENS sensing sensitivity adjustment terminal of the control module is electrically connected between the ninth resistor and the tenth resistor.

[0030] The sensing sensitivity adjustment circuit in this optional solution can adjust the signal sensitivity of the circuit to improve the accuracy of detection.

[0031] Optionally, an LED current limiting circuit is further included, and the LED current limiting circuit includes a current limiting resistor electrically connected between the power module and the LED module.

[0032] In this optional solution, the LED current limiting circuit limits the current flowing through the LED module to protect the LED module.

[0033] The beneficial effects of the utility model are:

[0034] The utility model uses the detection of human infrared rays to turn on the lamp. The setting of the load switch circuit realizes the automatic intelligent switching of the lamp, which can also save power. The vehicle lights can be automatically lit at night and in the basement, improving timely and effective lighting. It is a pioneer in two-wheeled vehicle lamps.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 It is a principle structure block diagram of embodiment 1;

[0038] Figure 2 This is a schematic diagram of the LDO power supply circuit;

[0039] Figure 3 This is the LDO circuit schematic;

[0040] Figure 4 This is a schematic diagram of the control module power supply filter circuit;

[0041] Figure 5 This is the circuit diagram of the pyroelectric infrared sensor module;

[0042] Figure 6 This is the circuit diagram of the light control module;

[0043] Figure 7 This is a schematic diagram of the induction sensitivity adjustment circuit;

[0044] Figure 8 It is a schematic diagram of the load switch circuit;

[0045] Figure 9 This is the LED module circuit diagram;

[0046] Figure 10 This is a schematic diagram of the LED current limiting circuit;

[0047] Figure 11 This is a schematic diagram of the signal output delay control circuit;

[0048] Figure 12 This is a schematic diagram of the control module circuit. DETAILED DESCRIPTION

[0049] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0051] Example 1

[0052] like Figure 1 As shown, this embodiment provides an induction control intelligent circuit for vehicle lights, which includes: a power supply module, a pyroelectric infrared sensor module, a light control module, an LED module, a load switch circuit, a control module, a control module power supply filter circuit, a signal output delay control circuit, an induction sensitivity adjustment circuit, and an LED current limiting circuit.

[0053] The power module provides power for the entire circuit, the pyroelectric infrared sensor module senses human infrared radiation, the light control module senses ambient light, and the LED module provides illumination. The load switch circuit is electrically connected to the LED module and controls whether the LED module is powered on or off. The control module is electrically connected to the signal output terminals of the pyroelectric infrared sensor module and the light control module, as well as the control terminal of the load switch circuit. It receives the human infrared signal sensed by the pyroelectric infrared sensor module and the ambient light brightness sensed by the light control module. Based on whether the ambient light brightness sensed by the light control module is below a critical value and whether the pyroelectric infrared sensor module senses human infrared radiation, it controls whether the load switch circuit is turned on or off, thereby controlling whether the LED module is lit or turned off. The control module power supply filter circuit filters the voltage input to the control module to make it smoother. The signal output delay control circuit delays the output signal of the control module. The induction sensitivity adjustment circuit adjusts the signal sensitivity of the circuit. The LED current limiting circuit limits the current flowing through the LED module.

[0054] Specifically, the power module includes an LDO circuit and an LDO power supply circuit. The LDO power supply circuit is electrically connected to the power supply terminal of the power supply to reduce and stabilize the voltage of the electrical signal provided by the power supply. The output terminal of the LDO power supply circuit is electrically connected to the input terminal of the LDO circuit, and the LDO circuit stabilizes and reduces the voltage of the electrical signal output by the LDO power supply circuit. The output terminal of the LDO circuit is electrically connected to the power connection terminal of the pyroelectric infrared sensor module, the light control module, the control module, the signal output delay control circuit, and the induction sensitivity adjustment circuit.

[0055] like Figure 2 As shown, the LDO power supply circuit includes a voltage-dividing diode D2, a third diode D3, a first transistor Q1, and a first filter capacitor C1. The power supply end is connected to the positive electrode of the third diode D3, the negative electrode of the third diode D3 is connected to the first voltage-dividing resistor, the other end of the voltage-dividing resistor is connected to the collector of the first transistor Q1, and the emitter of the first transistor Q1 is connected to the input end of the LDO circuit. In this embodiment, the first voltage-dividing resistor is composed of a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. The negative electrode of the third diode D3 is also connected to a fifth resistor R5 for voltage division, the other end of the fifth resistor R5 is connected to the base of the first transistor Q1, the base of the first transistor Q1 is also connected to one end of the first filter capacitor C1 and the negative electrode of the voltage-dividing diode D2, and the other end of the first filter capacitor C1 and the positive electrode of the voltage-dividing diode D2 are grounded.

[0056] In this embodiment, the power supply terminal supplies 48V to 100V power. After connecting a third diode D3 for reverse polarity protection, a first voltage-dividing resistor is connected for voltage division, and then the collector of the first transistor Q1 is connected. A fifth resistor R5 is also connected for voltage division. The fifth resistor R5 is connected in series with the voltage-stabilizing diode D2 to ensure that the voltage-stabilizing diode is in a stable state. The voltage-stabilizing diode D2 is connected to the base of the transistor Q1 to ensure stable operation. A first filter capacitor C1 is connected in parallel to stabilize the voltage of the transistor, ensuring a stable voltage supplied to the LDO circuit. The first transistor Q1 is preferably, but not limited to, a 2N551NPN transistor.

[0057] like Figure 3 As shown, the LDO circuit includes a three-terminal voltage regulator IC1. The emitter of a first transistor Q1, which serves as the output terminal of the LDO power supply circuit, is connected to the input terminal of the three-terminal voltage regulator IC1. The output terminal of the three-terminal voltage regulator IC1 is electrically connected to the power supply terminals of the pyroelectric infrared sensor module, the light control module, the control module, the signal output delay control circuit, and the induction sensitivity adjustment circuit. A second capacitor C2 and a third capacitor C3 are connected in parallel between the input terminal of the three-terminal voltage regulator IC1 and ground. A fourth capacitor C4 and a fifth capacitor C5 are connected in parallel between the output terminal of the three-terminal voltage regulator IC1 and ground.

[0058] In this embodiment, the model of the three-terminal voltage regulator chip IC1 is preferably but not limited to TX3405, which converts the voltage provided by the LDO power supply circuit into 3.3V. The second capacitor C2 and the third capacitor C3 make the voltage waveform of the input three-terminal voltage regulator chip IC1 smoother, and the fourth capacitor C4 and the fifth capacitor C5 make the voltage waveform of the output three-terminal voltage regulator chip IC1 smoother.

[0059] like Figure 4 、 Figure 12 As shown, the control module power supply filter circuit includes a second filter capacitor C8, the control module includes a main control chip U1, the positive power supply of the main control chip U1 is connected to the 3.3V power supply output by the LDO circuit, and the positive power supply of the main control chip U1 is connected to the second filter capacitor C8 to the ground to prevent the input voltage fluctuation from affecting the operation of the main control chip U1.

[0060] like Figure 5 、 Figure 12 As shown, the pyroelectric infrared sensor module includes a pyroelectric infrared sensor IC2. The positive terminal of the pyroelectric infrared sensor IC2 is connected to the 3.3V power supply output of the LDO circuit. The positive terminal of the pyroelectric infrared sensor IC2 is also connected to a seventh capacitor C7 to ground to prevent input voltage fluctuations from affecting the components. The signal output terminal of the pyroelectric infrared sensor IC2 is connected to the RIP sensor signal input terminal of the main control chip U1 of the control module. The signal output pin of the pyroelectric infrared sensor IC2 is connected in series with a sixth capacitor C6 to eliminate noise interference. In this embodiment, the model of the pyroelectric infrared sensor IC2 is preferably, but not limited to, NS312 / ES312.

[0061] like Figure 6 、 Figure 12 As shown, the light control module includes a phototransistor KDI. A sixth resistor R6 is electrically connected between the collector of the phototransistor KDI and the output of the LDO circuit. The emitter of the phototransistor KDI is grounded, and its light-sensitive signal output is connected to the light-sensitive signal input CDS of the main control chip U1 of the control module. The resistance of the sixth resistor R6 controls the trigger threshold. The lower the resistance, the greater the ambient light brightness corresponding to the threshold. The model of the phototransistor KDI is preferably, but not limited to, YLS150.

[0062] like Figure 7 、 Figure 12As shown, the sensitivity adjustment circuit includes a ninth resistor R9 and a tenth resistor R10 connected in series, connected between the output of the LDO circuit and ground. The 3.3V output of the LDO circuit is connected to the ninth resistor R9, and the SENS sensitivity adjustment pin of the control module's main control chip U1 is electrically connected between the ninth resistor R9 and the tenth resistor R10. Adjusting the resistance of the tenth resistor R10 can adjust the voltage received by the SENS sensitivity adjustment pin of the main control chip U1. In this embodiment, the voltage range is 0V to 5.5V. A higher voltage increases the sensitivity, thereby changing the sensitivity of the main control chip U1.

[0063] like Figure 8 、 Figure 9 、 Figure 12 As shown, the load switch circuit includes a switching transistor Q2. A 20th resistor R20 is electrically connected between the base of the switching transistor Q2 and the control signal output terminal of the main control chip U1 of the control module. The emitter of the switching transistor Q2 is grounded, and its collector is electrically connected to the LED module. A 21st resistor R21 is electrically connected between the emitter and base of the switching transistor Q2. In this embodiment, the LED module is a circuit composed of multiple LED lamp beads connected in series. The switching transistor Q2 is preferably, but not limited to, a 2N551NPN transistor.

[0064] like Figure 2 、 Figure 10 As shown, the power supply terminal is further connected to the anode of a fourth diode D4, the cathode of which is connected to the power supply terminal of the LED current limiting circuit. The output terminal of the LED current limiting circuit is electrically connected to the input terminal of the LED module. In this embodiment, the LED current limiting circuit includes a current limiting resistor composed of multiple resistors connected in series and parallel. The fourth diode D4 serves as a reverse polarity protection device.

[0065] like Figure 11 、 Figure 12 As shown, the signal output delay control circuit includes a seventh resistor R7 and an eighth resistor R8 connected in series, connected between the output of the LDO circuit of the power module and ground. The 3.3V output of the LDO circuit is connected to the seventh resistor R7, and the TDS timing control input pin of the main control chip U1 of the control module is electrically connected between the seventh resistor R7 and the eighth resistor R8. Adjusting the resistance value of the eighth resistor R8 can adjust the control signal output delay time.

[0066] Control principle: The voltage provided by the power supply end is connected to the LED current limiting circuit for voltage division after passing through the fourth diode D4, and then the voltage is divided to power the LED module. When the light control module senses that the ambient light brightness is lower than the critical value and the pyroelectric infrared sensor IC2 detects the human infrared signal, the control signal output end of the main control chip U1 outputs a high level, which is connected to the base of the switching transistor Q2 after passing through the twentieth resistor R20. The switching transistor Q2 is turned on and the LED module is lit; when the light control module senses that the ambient light brightness is not lower than the critical value or the pyroelectric infrared sensor IC2 does not detect the human infrared signal, the control signal output end of the main control chip U1 outputs a low level. When there is no signal, the twenty-first resistor R21 pulls down to keep the switching transistor Q2 non-conductive, and the LED module remains off. In this embodiment, considering that the model of the pyroelectric infrared sensor IC2 is NS312 / ES312, the main control chip U1 first outputs a high level each time it is powered on. After about 15 seconds, the pyroelectric infrared sensor IC2 stabilizes. At this time, the main control chip U1 outputs a low level and enters the normal detection state.

[0067] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An intelligent circuit for induction control of vehicle lights, characterized in that: include Power module, providing power for the entire circuit; Pyroelectric infrared sensor module, used to sense infrared rays from the human body; Light control module, used to sense ambient light brightness; LED modules for lighting; a load switch circuit, electrically connected to the LED module, for controlling the LED module to connect or disconnect power; The control module is electrically connected to the signal output end of the pyroelectric infrared sensor, the light control module, and the control end of the load switch circuit. According to whether the light control module senses that the ambient light brightness is lower than a critical value and whether the pyroelectric infrared sensor module senses human infrared rays, the load switch circuit is controlled to be turned on or off, thereby controlling the LED module to light up or turn off.

2. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: The load switch circuit includes a switching transistor, the base of the switching transistor is connected to the control signal output end of the control module, the emitter of the switching transistor is grounded, and the collector is electrically connected to the LED module. A twenty-first resistor is electrically connected between the emitter and base of the switching transistor.

3. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: The light control module includes a phototransistor, a collector of the phototransistor is connected to the power module, an emitter thereof is grounded, and a photosensitive signal output end thereof is connected to a photosensitive signal input end of the control module.

4. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: The power supply module includes an LDO circuit and an LDO power supply circuit; The LDO power supply circuit is electrically connected to the power supply end of the power supply, and steps down and stabilizes the electrical signal provided by the power supply; the output end of the LDO power supply circuit is electrically connected to the input end of the LDO circuit, and the LDO circuit stabilizes and steps down the electrical signal output by the LDO power supply circuit; the output end of the LDO circuit is electrically connected to the power connection end of the control module, the pyroelectric infrared sensor module, and the light control module.

5. The induction control intelligent circuit for vehicle lights according to claim 4, characterized in that: The LDO power supply circuit includes a voltage stabilizing diode, a third diode, a first transistor, and a first filter capacitor; The power supply end is connected to the anode of the third diode, the cathode of the third diode is connected to a voltage-dividing resistor, the other end of the voltage-dividing resistor is connected to the collector of the first transistor, and the emitter of the first transistor is connected to the input end of the LDO circuit; The cathode of the third diode is also connected to another voltage-dividing resistor, the other end of the voltage-dividing resistor is connected to the base of the first transistor, the base of the first transistor is also connected to one end of the first filter capacitor C1 and the cathode of the voltage-stabilizing diode, and the other end of the first filter capacitor and the anode of the voltage-stabilizing diode are grounded.

6. The induction control intelligent circuit for vehicle lights according to claim 4, characterized in that: The LDO circuit includes a three-terminal voltage regulator chip; The output end of the LDO power supply circuit is connected to the input end of the three-terminal voltage regulator chip, and the output end of the three-terminal voltage regulator chip is electrically connected to the power connection end of the pyroelectric infrared sensor module and the light control module; A second capacitor and a third capacitor are connected in parallel between the input terminal of the three-terminal voltage stabilizing chip and the ground; a fourth capacitor and a fifth capacitor are connected in parallel between the output terminal of the three-terminal voltage stabilizing chip and the ground.

7. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: It also includes a control module power supply filter circuit, which includes a second filter capacitor. The power connection end of the control module is electrically connected to one end of the second filter capacitor, and the other end of the second filter capacitor is grounded.

8. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: It also includes a signal output delay control circuit, the signal output delay control circuit includes a seventh resistor and an eighth resistor connected in series between the output terminal of the power module and the ground; The TDS timing control input terminal of the control module is electrically connected between the seventh resistor and the eighth resistor.

9. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: It also includes an inductive sensitivity adjustment circuit, the inductive sensitivity adjustment circuit including a ninth resistor and a tenth resistor connected in series between the output terminal of the power module and the ground; The SENS sensing sensitivity adjustment terminal of the control module is electrically connected between the ninth resistor and the tenth resistor.

10. The induction control intelligent circuit for vehicle lights according to claim 1, characterized in that: The LED current limiting circuit is also included. The LED current limiting circuit includes a current limiting resistor electrically connected between the power module and the LED module.

Images