A gas station light rainwater detection circuit
By using a rainwater detection circuit in the gas station light to convert electrical signals and regulate power supply when rainwater comes into contact with the equipment, the problem of the waterproof pad being unable to disconnect the protection circuit is solved, enabling the equipment to protect itself and improving its reliability and service life.
Patent Information
- Application Number
- CN202522561538.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-02
AI Technical Summary
In existing technologies, waterproof pads cannot disconnect the protection circuit when it rains, resulting in unsatisfactory waterproof performance when electronic devices are used outdoors.
A rainwater detection circuit for a gas station light was designed, including a rainwater sensor, an electrical signal conversion circuit, and a control circuit. When rainwater comes into contact with the light, it is converted into an electrical signal, and the control circuit is used to regulate the power supply of electronic components, such as cutting off power to unnecessary components to avoid short circuits and leakage.
It effectively eliminates the risk of short circuits, leakage, and component burnout caused by moisture infiltration, improves the stability and safety of equipment use, and extends equipment life.
Smart Images
Figure CN224947738U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of rainwater protection technology for lamps, and specifically relates to a rainwater detection circuit for gas station lamps. Background Technology
[0002] The operating environment of electronic devices is quite complex. Most electronic devices are set up outdoors. Therefore, in order to improve the stability of electronic devices, it is necessary to automatically protect them from rain and ensure stable operation, thereby achieving a waterproof effect. In the existing technology, waterproofing is mainly achieved through waterproof pads. However, the waterproof pads in electronic devices cannot disconnect the protective circuits in the rain, making it difficult to achieve the ideal waterproof effect. Summary of the Invention
[0003] The purpose of this invention is to provide a rainwater detection circuit for a gas station lamp with a reasonable structural design and improved rainwater protection performance.
[0004] The technical solution for achieving the purpose of this utility model is a rainwater detection circuit for a gas station lamp, including an input power supply, a power supply circuit connected to the input power supply, an LED lamp driving circuit connected to the power supply circuit and a lamp connection terminal connected to the LED lamp driving circuit, and also including a rainwater detection processor connected to the LED lamp driving circuit, a rainwater detection circuit connected to the rainwater detection processor and a control circuit connected to the rainwater detection processor. The rainwater detection circuit includes a rainwater sensor and an electrical signal conversion circuit connected to the rainwater sensor. The electrical signal conversion circuit is connected to the signal input terminal of the rainwater detection processor.
[0005] A further preferred embodiment is that the control circuit includes an optocoupler, a seventeenth resistor, a voltage regulator circuit, a twenty-first resistor, a twentieth resistor, a third transistor, a fifth transistor, a seventh unidirectional diode, and a MOSFET; The signal input terminal of the optocoupler is connected to the rainwater detection processor through the seventeenth resistor, and the voltage regulator circuit is connected to the power supply terminal of the optocoupler. The signal output terminal of the optocoupler is connected to the base of the third transistor and the base of the fifth transistor through the twentieth resistor; The collector of the fifth transistor is connected to the voltage regulator circuit; The emitter of the fifth transistor and the emitter of the third transistor are both connected to the gate of the MOS transistor. The seventh unidirectional diode is connected between the substrate and the emitter of the third transistor, and the negative terminal of the seventh unidirectional diode is connected to the emitter of the third transistor. The source and drain of the MOS transistor are connected to the negative terminal of the lamp connection terminal.
[0006] A further preferred embodiment is that the third transistor is a PNP transistor and the fifth transistor is an NPN transistor.
[0007] A further preferred embodiment is that the MOS transistor is an NMOS transistor.
[0008] This invention has positive effects: its structure is reasonably designed, and through the rainwater detection circuit, it can convert rainwater into a specific electrical signal when it comes into contact with the water, and transmit it to the rainwater detection processor for processing. At the same time, through the control circuit, it realizes the power supply regulation and control of electronic components, such as powering off unnecessary components. This can fundamentally eliminate the risk of short circuits, leakage and component burnout caused by water seepage, improve the stability and effectiveness of the overall structure, achieve self-protection capabilities, and improve the reliability, safety and service life of the equipment. Attached Figure Description
[0009] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the circuit structure of this utility model.
[0010] Reference numerals: 1. Input power supply; 2. Power supply circuit; 3. LED lamp driver circuit; 4. Lamp connection terminal; 5. Rain detection processor; 6. Rain detection circuit; 61. Rain sensor; 62. Electrical signal conversion circuit; 7. Control circuit. Detailed Implementation
[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example
[0012] See Figure 1As shown, a rainwater detection circuit for a gas station light includes an input power supply 1, a power supply circuit 2 connected to the input power supply, an LED light driving circuit 3 connected to the power supply circuit, and a light connection terminal 4 connected to the LED light driving circuit. It also includes a rainwater detection processor 5 connected to the LED light driving circuit, a rainwater detection circuit 6 connected to the rainwater detection processor, and a control circuit 7 connected to the rainwater detection processor. The input power supply, power supply circuit, and LED light driving circuit are all conventional structures in the prior art, simply applied, and therefore not described in detail. The rainwater detection processor is a control chip equipped with control commands. Its main function is to receive signals and generate control signals to activate the control circuit and de-energize internal components, improving operational stability and safety reliability.
[0013] Furthermore, the rain detection circuit includes a rain sensor 61 and an electrical signal conversion circuit 62 connected to the rain sensor. The electrical signal conversion circuit is connected to the signal input terminal of the rain detection processor. The rain sensor is a high-sensitivity rain sensor, primarily used to identify a change in electrical signal as a fixed quantity the moment the first raindrop contacts the device.
[0014] In this embodiment, the control circuit includes an optocoupler U4, a seventeenth resistor R17, a voltage regulator circuit ZD3, a twenty-first resistor R21, a twentieth resistor R20, a third transistor Q3, a fifth transistor Q5, a seventh unidirectional diode D7, and a MOSFET Q4. During connection, the signal input terminal of the optocoupler is connected to the rain detection processor via the seventeenth resistor, and the voltage regulator circuit is connected to the power supply terminal of the optocoupler. The signal output terminal of the optocoupler is connected to the base of the third transistor and the base of the fifth transistor via the twentieth resistor. The collector of the fifth transistor is connected to the voltage regulator circuit. The emitters of both the fifth and third transistors are connected to the gate of the MOSFET. The seventh unidirectional diode is connected between the substrate and emitter of the third transistor, and the negative terminal of the seventh unidirectional diode is connected to the emitter of the third transistor. The source and drain of the MOSFET are connected to the negative terminal of the lamp connection terminal.
[0015] In this embodiment, the third transistor is a PNP transistor, the fifth transistor is an NPN transistor, and the MOS transistor is an NMOS transistor.
[0016] This invention has positive effects: its structure is reasonably designed, and through the rainwater detection circuit, it can convert rainwater into a specific electrical signal when it comes into contact with the water, and transmit it to the rainwater detection processor for processing. At the same time, through the control circuit, it realizes the power supply regulation and control of electronic components, such as powering off unnecessary components. This can fundamentally eliminate the risk of short circuits, leakage and component burnout caused by water seepage, improve the stability and effectiveness of the overall structure, achieve self-protection capabilities, and improve the reliability, safety and service life of the equipment.
[0017] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.
[0018] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.
Claims
1. A rainwater detection circuit for a gas station lamp, comprising an input power supply, a power supply circuit connected to the input power supply, an LED lamp driving circuit connected to the power supply circuit, and a lamp connection terminal connected to the LED lamp driving circuit, characterized in that: It also includes a rainwater detection processor connected to the LED lamp driving circuit, a rainwater detection circuit connected to the rainwater detection processor, and a control circuit connected to the rainwater detection processor; The rainwater detection circuit includes a rainwater sensor and an electrical signal conversion circuit connected to the rainwater sensor. The electrical signal conversion circuit is connected to the signal input terminal of the rainwater detection processor.
2. The rainwater detection circuit for a gas station lamp according to claim 1, characterized in that: The control circuit includes an optocoupler, a seventeenth resistor, a voltage regulator circuit, a twenty-first resistor, a twentieth resistor, a third transistor, a fifth transistor, a seventh unidirectional diode, and a MOSFET. The signal input terminal of the optocoupler is connected to the rainwater detection processor through the seventeenth resistor, and the voltage regulator circuit is connected to the power supply terminal of the optocoupler. The signal output terminal of the optocoupler is connected to the base of the third transistor and the base of the fifth transistor through the twentieth resistor; The collector of the fifth transistor is connected to the voltage regulator circuit; The emitter of the fifth transistor and the emitter of the third transistor are both connected to the gate of the MOS transistor. The seventh unidirectional diode is connected between the substrate and the emitter of the third transistor, and the negative terminal of the seventh unidirectional diode is connected to the emitter of the third transistor. The source and drain of the MOS transistor are connected to the negative terminal of the lamp connection terminal.
3. The rainwater detection circuit for a gas station lamp according to claim 2, characterized in that: The third transistor is a PNP transistor, and the fifth transistor is an NPN transistor.
4. The rainwater detection circuit for a gas station lamp according to claim 2, characterized in that: The MOS transistor is an NMOS transistor.