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Windscreen wiper control method based on rainfall sensor

A control method and rainfall technology, applied in rainfall/precipitation meters, measuring devices, scientific instruments, etc., can solve problems such as inaccurate rainfall judgment, unreasonable wiper speed control, and untimely wiper response.

Pending Publication Date: 2020-09-15
SAIC-GM-WULING AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

At present, there are many problems in the control strategy of the automatic sensing wiper on the market, such as: the judgment of rainfall is not accurate enough, the response of the wiper is not timely, and the control of the wiper speed is unreasonable, etc., which will affect the driver's field of vision.

Method used

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  • Windscreen wiper control method based on rainfall sensor

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] The flow chart of a wiper control method based on the rate of change of rainfall in an embodiment of the present invention is as follows figure 1 As shown, the method includes:

[0025] S101, within the rainfall collection period T, collect the rainfall value output by the rainfall sensor at a time interval of ΔT, and calculate the rainfall change rate of each collection point;

[0026] S102. Count the number of data whose rainfall change rate falls within the no-rain threshold interval, light rain threshold interval, moderate rain threshold interval, and heavy rain threshold interval within the collection period T, and determine the current value according to the maximum value of the data numbers falling in the four intervals rainfall status;

[0027] S103. Control the movement state of the wiper according to the rainfall state.

[0028] As an opti...

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Abstract

The invention discloses a windscreen wiper control method based on a rainfall change rate. The method comprises the steps that: rainfall values output by a rainfall sensor are collected with delta T as the time interval in a rainfall collection period T, and the rainfall change rate of each collection point is calculated; and the number of the data of the rainfall change rate falling in the rain-free threshold interval, the light rain threshold interval, the medium rain threshold interval and the heavy rain threshold interval in the acquisition period T are put into statistics, the current rainfall state is determined according to the maximum value of the number of the data falling in the four intervals, and the motion state of a windscreen wiper is controlled according to the rainfall state. According to the method of the invention, the rainfall state and the jump of the rainfall state can be accurately judged according to the rainfall change rate, so that the windscreen wiper is controlled to move at a speed suitable for different rainfall states.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a wiper control method based on the rate of change of rainfall. Background technique [0002] In recent years, with the rapid development of automotive electronic technology, more and more vehicles are equipped with automatic sensing wiper system, which can adjust the wiper speed through the output of the rain sensor to realize the function of automatic sensing wiper. One of the key technologies of automatic sensing wiper is the software control strategy. A good control strategy can accurately monitor and identify the amount of rain, adjust the wiper speed in time, and improve driving safety and comfort. At present, there are many problems in the control strategy of the automatic sensing wiper on the market, such as: the judgment of rainfall is not accurate enough, the response of the wiper is not timely, and the control of the wiper speed is unreasonable, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60S1/08G01W1/14
CPCB60S1/0859G01W1/14
Inventor 邓宇彭杨崔硕
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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