Anti-fog photoelectric multiple waveguide rain sensor

Abstract

The invention relates to an anti-fog type photoelectric multiple waveguide rain sensor, which includes a transmitter and a receiver, and is characterized in that: the front ends of the transmitter and the receiver are flexible lenses; a mounting plate is provided, and there are two lenses on the mounting plate hole, the flexible lenses of the transmitter and the receiver are respectively installed in the lens hole; after installation, the plane of the flexible lens is higher than the plane of the mounting plate; a soft pad is arranged on the mounting plate, and a through groove is opened on the soft pad, and the through groove The flexible lenses that hold the transmitter and receiver, and the area between the two flexible lenses. The positive effect of the present invention is that: the front end of the device forms an integral flexible plane, which has elastic deformation and can be bonded to the windshield; moreover, after the bonding, the inner surface of the glass in the waveguide area is in a closed state, which does not And the air circulation in the car, so it will not be affected by the temperature in the car, can effectively prevent the fogging phenomenon on the inner surface of the glass, and avoid the misoperation of the wiper.

Description

technical field [0001] The invention relates to a rain sensor. Background technique [0002] In recent years, in the field of automobiles, automatic wipers have appeared. The main principle is that a complete optical path is formed between the light transmitter and receiver. When there are raindrops on the car glass, the reflection of the optical path is affected, and the receiver receives If the signal is less than enough light intensity, a signal is formed, and the actuator is driven through the circuit device to make the wiper move to scrape off the rainwater. After the raindrops are wiped off, the optical path returns to the initial state. The whole action is carried out automatically without human intervention, which can reduce the driver's driving burden. [0003] Initially, the light between the transmitter and the receiver has only one reflection action. Since the distribution of raindrops is random, out of the requirement for perception accuracy, the technology of ...

AI Technical Summary

Problems solved by technology

[0004] The above multiple waveguide method has a good effect in practice, but there are also shortcomings: when there is a temperature difference between the inside and outside of the windshield, the inner surface of the glass is prone to fogging, and the foggy water on the inner surface will also affect the optical path. In this case, Even if it is not raining, the wiper will still malfunction, which forms a malfunction

And when it rains, the automatic wiper will also cause malfunction

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