Self-service car washing machine energy-saving light illumination system

Abstract

The utility model discloses a kind of self-service car washer energy-saving light illumination system, including photosensitive signal acquisition module, signal decoding module, logic control module and push-pull drive module. Photosensitive signal acquisition module is used to collect car washer ambient light brightness, and exports photosensitive control signal. Signal decoding module receives photosensitive control signal and car washer input signal, and the encoding signal with three kinds of logic states is output through decoder. Logic control module uses logic chip, the input end of logic chip is connected with the output end of decoder, when only photosensitive control signal is effective, effective signal is output from the first output port of logic chip, when photosensitive control signal and car washer input signal are all effective, effective signal is output from the second output port of logic chip. Push-pull drive module receives the effective signal output by logic chip, and PMOS is driven to illuminate load using push-pull. Can avoid daytime invalid power consumption, save electric energy, save cost for operation management party.

Description

Technical Field

[0001] This utility model belongs to the field of lighting control technology for self-service car wash machines, and specifically relates to an energy-saving lighting system for self-service car wash machines. Background Technology

[0002] Self-service car wash machines are car wash equipment that users operate themselves and pay for. They are usually open 24 hours a day and provide efficient and low-cost car wash services.

[0003] Traditional self-service car washes use a constant lighting system, which cannot automatically adjust according to the ambient light intensity. Even when there is sufficient natural light during the day, the lighting system of the self-service car wash remains in operation, wasting electricity. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide an energy-saving lighting system for self-service car wash machines, which can save electricity and reduce costs for operators and managers.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A self-service car wash machine energy-saving lighting system is characterized by comprising a photosensitive signal acquisition module, a signal decoding module, a logic control module, and a push-pull drive module.

[0007] The photosensitive signal acquisition module is used to collect the ambient light intensity around the car wash machine and output a photosensitive control signal.

[0008] The signal decoding module receives the photosensitive control signal and the car wash machine input signal, and outputs the encoded signal with three logic states through the decoder. The three logic states correspond to: (1) when only the photosensitive control signal is valid, output a set of signal one; (2) when only the car wash machine input signal is valid, output a set of signal two; (3) when both the photosensitive control signal and the car wash machine input signal are valid, output a set of signal three.

[0009] The logic control module uses a logic chip. The input of the logic chip is connected to the output of the decoder. When only the photosensitive control signal is valid, a valid signal is output from the first output port of the logic chip. When both the photosensitive control signal and the car wash machine input signal are valid, a valid signal is output from the second output port of the logic chip.

[0010] The push-pull driver module receives the valid signal output by the logic chip and uses push-pull to drive the lighting load with the PMOS.

[0011] Furthermore, it also includes a PWM generation module, which receives the valid signal output from the first output port of the logic chip and generates a square wave signal. The square wave signal controls the brightness of the lighting load through the PMOS.

[0012] Furthermore, the PWM generation module includes a Schmitt trigger composed of an NE555 chip and an RC integrator circuit forming a multivibrator. The duty cycle and frequency are adjusted by adjustable resistors R11 and R12, respectively. It receives the valid signal output from the first output port of the logic chip and generates a square wave signal.

[0013] Furthermore, the square wave signal is a 38kHz square wave signal with a duty cycle of 1 / 3.

[0014] Furthermore, the photosensitive signal acquisition module includes a photoresistor R5, an adjustable resistor VR1, a comparator, and a relay. The photoresistor R5 and the adjustable resistor VR1 form a voltage divider circuit. The comparator compares the divided voltage signal with a threshold and then drives the relay to operate through a transistor. The relay outputs a photosensitive control signal.

[0015] Furthermore, the comparator uses an LM393 comparator.

[0016] Furthermore, signal one is specifically the HLHHHHHH signal, signal two is specifically the LLHHHHHH signal, and signal three is specifically the HHHHHHHH signal.

[0017] Furthermore, the logic chip used is the 74HC20 logic chip.

[0018] Furthermore, the push-pull drive module includes symmetrically arranged NPN transistors and PNP transistors. The output terminals of the NPN transistors and PNP transistors are connected to the gate of the PMOS transistor, enabling the PMOS transistor to drive the lighting load.

[0019] Furthermore, the push-pull drive module also includes a resistor R13 and a high-speed diode, which are connected between the NPN transistor / PNP transistor and the PMOS.

[0020] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0021] This invention collects ambient light levels around the car wash machine and uses a combination of photosensitive control signals and input signals from the car wash machine to achieve three operating modes:

[0022] (1) Only the photosensitive control signal is valid, nighttime standby mode;

[0023] (2) Only the car wash machine input signal is valid, daytime operation mode;

[0024] (3) Both the photosensitive control signal and the car wash machine input signal are valid, night operation mode.

[0025] For the three logic relationships, when only the photosensitive control signal is valid, a valid signal is output from the first output port of the logic chip. When both the photosensitive control signal and the car wash machine input signal are valid, a valid signal is output from the second output port of the logic chip. Two different control results are output to drive the lighting lights to turn on and off.

[0026] Specifically, the lights will not operate even if a user places an order during the day, as long as the car wash machine's input signal is valid. The lights will only start operating when the photosensitive control signal is valid and nighttime is detected, thus avoiding unnecessary power consumption during the day, saving energy, and reducing costs for the operation and management team. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 This is the circuit diagram of the photosensitive signal acquisition module;

[0029] Figure 2 This is the circuit diagram of the signal decoding module;

[0030] Figure 3 This is the circuit diagram for the logic control module;

[0031] Figure 4 This is the circuit diagram of the PWM generator module;

[0032] Figure 5 The circuit diagram for the push-pull drive module;

[0033] Figure 6 This is the overall circuit diagram of the lighting system. Detailed Implementation

[0034] like Figures 1 to 6 As shown, this utility model discloses an energy-saving lighting system for a self-service car wash machine. It is used in self-service car wash machines. After the user scans the code to place an order, the car wash machine starts working. The lighting system turns on the lights according to the order. Specifically, during the day, the car wash machine is working and the lights are off; at night, the lights are dimly lit or off when the car wash machine is not working, or the lights are constantly lit when the car wash machine is working.

[0035] This utility model includes a photosensitive signal acquisition module, a signal decoding module, a logic control module, a PWM generation module, and a push-pull drive module.

[0036] like Figure 1 As shown, this utility model has a photosensitive signal acquisition module, which is a circuit for acquiring ambient light intensity around a self-service car wash machine.

[0037] Implementation principle: The photoresistor R5 collects the ambient light level around the car wash machine. The sensitivity of the collection is adjusted by the adjustable resistor VR1. The collected signal is compared with the LM393 comparator and the output of the threshold drives the transistor Q1 to conduct, thereby controlling the relay to close. The use of the relay here can flexibly provide various input signals to the subsequent circuit.

[0038] like Figure 2 As shown, this is the signal decoding module of the present invention, which is an external signal input circuit.

[0039] This module uses a decoder chip with two external high-level input signal sources. It supports three logic relationships and outputs two different control results. For example, when the photosensitive control signal NO provides a high-level signal but the car wash machine does not, the decoder should output a set of HLHHHHHH signals. When the photosensitive control signal NO does not provide a signal but the car wash machine provides a high-level signal, the decoder should output a set of LLHHHHHH signals. When both the photosensitive control signal NO and the car wash machine provide a high-level signal, the decoder should output a set of HHHHHHHH signals.

[0040] like Figure 3 As shown, this is the logic control module of the present invention, which outputs signals to the logic chip through a decoder.

[0041] Ports 1A and 1B of the logic chip are the valid truth input terminals for the decoder after decoding the external input signal. After input, the 74HC20 logic chip outputs according to the input logic judgment. When the photosensitive control circuit inputs a high-level signal, output port 1Y outputs a valid signal; when both the photosensitive control circuit and the car wash machine input high-level signals, output port 2Y outputs a valid signal.

[0042] like Figure 4 As shown, this is the PWM generation module of the present invention, which is a PWM pulse frequency generation and control circuit.

[0043] The PWM pulse generation and control circuit uses an NE555 chip to form a Schmitt trigger, combined with an RC integrator circuit to form a multivibrator. By adjusting the duty cycle of R11 and the frequency of R12, a square wave with a duty cycle of 1 / 3 and a frequency of 38kHz is generated. The logic chip outputs the original signal from the external signal through R9 into the PWM circuit, and after adjusting the duty cycle and frequency, outputs a control signal from the OUT terminal to the subsequent circuit.

[0044] like Figure 5 As shown, this utility model has a push-pull drive module, whose push-pull output quickly controls the PMOS switch to turn on and off, driving the lighting light to turn on and off.

[0045] The push-pull circuit, composed of NPN transistor Q2 and PNP transistor Q3, uses two power transistors with identical parameters connected in a push-pull configuration. Each transistor is responsible for amplifying the waveform during the positive and negative half-cycles. During operation, only one of the two symmetrical switching transistors (Q2 and Q3) is conducting at a time, resulting in low conduction losses and high efficiency. Q4 (FHP5N40) is a PMOS switch, a switching device. A resistor R13 and a fast-discharge diode D5 are placed between the NPN / PNP transistor and the PMOS transistor. The push-pull output drives the PMOS gate, and the fast-discharge diode D5 helps the PMOS gate capacitor discharge quickly, allowing it to turn off faster and control the PMOS to drive the lighting (LED2) load.

[0046] This invention collects ambient light levels around the car wash machine and uses a combination of photosensitive control signals and input signals from the car wash machine to achieve three operating modes:

[0047] (1) Only the photosensitive control signal is valid, nighttime standby mode;

[0048] (2) Only the car wash machine input signal is valid, daytime operation mode;

[0049] (3) Both the photosensitive control signal and the car wash machine input signal are valid, night operation mode.

[0050] For the three logic relationships, when only the photosensitive control signal is valid, a valid signal is output from the first output port of the logic chip. When both the photosensitive control signal and the car wash machine input signal are valid, a valid signal is output from the second output port of the logic chip. Two different control results are output to drive the lighting lights to turn on and off.

[0051] Specifically, the lights will not operate even if a user places an order during the day, as long as the car wash machine's input signal is valid. The lights will only start operating when the photosensitive control signal is valid and nighttime is detected, thus avoiding unnecessary power consumption during the day, saving energy, and reducing costs for the operation and management team.

[0052] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. An energy-saving lighting system for a self-service car wash machine, characterized in that, include: A photosensitive signal acquisition module is used to acquire the ambient light intensity around the car wash machine and output a photosensitive control signal; A signal decoding module receives the photosensitive control signal and the car wash machine input signal, and outputs an encoded signal with three logic states through a decoder. The three logic states correspond to the following: (1) When only the photosensitive control signal is valid, output a set of signals; (2) When only the car wash machine input signal is valid, output a set of signal two; (3) When both the photosensitive control signal and the car wash machine input signal are valid, a set of signals is output; A logic control module employs a logic chip. The input terminal of the logic chip is connected to the output terminal of the decoder. When only the photosensitive control signal is valid, a valid signal is output from the first output port of the logic chip. When both the photosensitive control signal and the car wash machine input signal are valid, a valid signal is output from the second output port of the logic chip. A push-pull driver module receives the valid signal output by the logic chip and uses push-pull to drive the lighting load with the PMOS.

2. The energy-saving lighting system for a self-service car wash machine according to claim 1, characterized in that: Also includes: The PWM generation module receives the valid signal output from the first output port of the logic chip and generates a square wave signal, which controls the brightness of the lighting load through the PMOS.

3. The energy-saving lighting system for a self-service car wash machine according to claim 2, characterized in that: The PWM generation module includes a Schmitt trigger composed of an NE555 chip and an RC integrator circuit forming a multivibrator. The duty cycle and frequency are adjusted by adjustable resistors R11 and R12, respectively. It receives the valid signal output from the first output port of the logic chip and generates a square wave signal.

4. The energy-saving lighting system for a self-service car wash machine according to claim 3, characterized in that: The square wave signal is a 38kHz square wave signal with a duty cycle of 1 / 3.

5. The energy-saving lighting system for a self-service car wash machine according to claim 1, characterized in that: The photosensitive signal acquisition module includes a photoresistor R5, an adjustable resistor VR1, a comparator, and a relay. The photoresistor R5 and the adjustable resistor VR1 form a voltage divider circuit. The comparator compares the divided voltage signal with a threshold and then drives the relay to operate through a transistor. The relay outputs a photosensitive control signal.

6. The energy-saving lighting system for a self-service car wash machine according to claim 5, characterized in that: The comparator used is an LM393 comparator.

7. The energy-saving lighting system for a self-service car wash machine according to claim 1, characterized in that: The signal is specifically the HLHHHHHHH signal; The second signal is specifically the LLHHHHHH signal; The second signal is specifically the HHHHHHHH signal.

8. The energy-saving lighting system for a self-service car wash machine according to claim 1, characterized in that: The logic chip used is the 74HC20 logic chip.

9. The energy-saving lighting system for a self-service car wash machine according to claim 1, characterized in that: The push-pull drive module includes symmetrically arranged NPN transistors and PNP transistors. The output terminals of the NPN transistors and the PNP transistors are connected to the gate of the PMOS transistor, so that the PMOS drives the lighting load.

10. The energy-saving lighting system for a self-service car wash machine according to claim 9, characterized in that: The push-pull drive module also includes a resistor R13 and a high-speed diode, wherein the resistor R13 and the high-speed diode are connected between the NPN transistor / the PNP transistor and the PMOS.

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