Rainfall adaptive sensing method of automobile windscreen wipers

Abstract

The present invention relates to a rainfall adaptive sensing method of automobile windscreen wipers. The existing techniques have the shortcomings of poor adaptive capability and low control accuracy. The method comprises the following steps: first, a controller in a rainfall sensing module is initialized, and a rainfall strength quantified threshold is read from a nonvolatile memory after initialization; a rainfall strength quantified grade is subsequently read by the rainfall sensing module from a motor control module for windscreen wipers; then, the current rainfall strength quantified grade is sensed and calculated by the rainfall sensing module through an infrared transmitter; finally, the current rainfall strength quantified grade is sent to the motor control module for windscreen wipers, the windscreen wipers are relatively controlled by the motor control module for windscreen wipers, and the current rainfall strength quantified grade is updated. The method has the advantages of adjustable rainfall strength grade, good flexibility, strong adaptive capability and capability of overcoming the influence of temperature, natural light strength and frost on rainfall detecting algorithm.

Description

technical field

[0001] The invention belongs to the technical field of automobile electronics, in particular to a method for self-adaptive sensing of rain of an automobile windshield wiper. Background technique

[0002] The wiper is one of the important components of the car body system. It is related to the safety of driving in rainy days. It is used to remove rain, snow, dust and muddy water on the windshield, rear window glass and headlight glass to ensure that the glass is transparent and clear. The traditional windshield wiper is made up of simple switch type control part and mechanical mechanism. The system drives the four-bar mechanism through the wiper motor with worm gear reducer, and at the same time drives the wiper blades on both sides to swing to clean the windshield. The driver manually operates the wiper combination switch to turn on the power and switch the working armature of the motor to realize the selection of the wiper opening and its working mode (fast...

Examples

Embodiment Construction

[0019] The specific steps of the rain adaptive sensing method for the automobile wiper are as follows:

[0020] Step (1) initializes the controller in the rainfall sensing module, and the initialization object includes single-chip clock frequency, input and output, internal variables, registers, non-volatile memory and interruption in the controller; described controller adopts Freescale company MC9S08EL16, the CPU operating frequency is 32MHz, the bus operating frequency is 16MHz, and contains 512 bytes of non-volatile memory inside.

[0021] Step (2) The controller in the rainfall sensing module reads the quantitative threshold of rainfall intensity from the non-volatile memory, and defines the minimum quantitative threshold of rainfall intensity as H Min , the maximum quantification threshold of rainfall intensity is H Max ;H Min and H Max The minima and maxima of the quantified values ​​of rainfall intensity for different rainfall intensities obtained from laboratory ex...

technical field

[0001] The invention belongs to the technical field of automobile electronics, in particular to a method for self-adaptive sensing of rain of an automobile windshield wiper. Background technique

[0002] The wiper is one of the important components of the car body system. It is related to the safety of driving in rainy days. It is used to remove rain, snow, dust and muddy water on the windshield, rear window glass and headlight glass to ensure that the glass is transparent and clear. The traditional windshield wiper is made up of simple switch type control part and mechanical mechanism. The system drives the four-bar mechanism through the wiper motor with worm gear reducer, and at the same time drives the wiper blades on both sides to swing to clean the windshield. The driver manually operates the wiper combination switch to turn on the power and switch the working armature of the motor to realize the selection of the wiper opening and its working mode (fast...

Examples

Embodiment Construction

[0019] The specific steps of the rain adaptive sensing method for the automobile wiper are as follows:

[0020] Step (1) initializes the controller in the rainfall sensing module, and the initialization object includes single-chip clock frequency, input and output, internal variables, registers, non-volatile memory and interruption in the controller; described controller adopts Freescale company MC9S08EL16, the CPU operating frequency is 32MHz, the bus operating frequency is 16MHz, and contains 512 bytes of non-volatile memory inside.

[0021] Step (2) The controller in the rainfall sensing module reads the quantitative threshold of rainfall intensity from the non-volatile memory, and defines the minimum quantitative threshold of rainfall intensity as H Min , the maximum quantification threshold of rainfall intensity is H Max ;H Min and H Max The minima and maxima of the quantified values ​​of rainfall intensity for different rainfall intensities obtained from laboratory ex...