Safe and reliable anti-clamping method

Abstract

A safe and reliable anti-clamping method comprises (1) a current threshold judging method, (2) a running time judging method and (3) a current value integral method, wherein (1) the current threshold judging method comprises if a motor current value is larger than a set current threshold, judging that a vehicle window meets with obstacles in rising, and stopping rising; and defining a variable I0, and if the current value is within a threshold range, enabling I0 to be equal to 1, or else enabling I0 to be equal to 0; (2) the running time judging method comprises accumulating continuous running time of a motor, taking 3-4s for the motor to rise from the bottom to the top under normal conditions, judging that the vehicle window meets with the obstacles in rising and stopping the vehicle window if the accumulated continuous running time of the motor exceeds 10s; defining a variable T0, enabling T0 to be equal to 1 if T0 is no larger than 15s, or else enabling T0 to be equal to 0; and (3) the current value integral method comprises performing continuous integration on the motor current value, and judging that the vehicle window meets with the obstacles in rising and stopping the vehicle window if an integral result is larger than the current integral threshold; and defining a variable M0, enabling M0 to be equal to 1 if the integral value is within an integral threshold range, or else enabling M0 to be equal to 0. If the variable values returned by the three methods are all 1, the vehicle window runs normally; and if any variable value is 0, the vehicle window is stopped.

Description

technical field [0001] The invention relates to a safe and reliable anti-pinch method, in particular to an absolute anti-pinch method based on motor current, and belongs to the technical fields of automobile body safety, intelligent window and control. Background technique [0002] Since the appearance of electric vehicle windows, many pinching accidents have been caused, so anti-pinching protection has been proposed. The existing anti-pinch methods are mainly based on the perspective of not adding hardware devices, and the stability of the method is used to ensure the realization of the anti-pinch method. Therefore, there are mainly two methods: [0003] One is the method based on the motor ripple. The ripple only utilizes the general characteristics of the motor and does not require additional sensors. However, there is a certain difficulty in measuring the ripple. The stability of the ripple detection method will directly affect the anti-pinch method. The final execution...

AI Technical Summary

Problems solved by technology

[0003] One is the method based on the motor ripple. The ripple only utilizes the general characteristics of the motor and does not require additional sensors. However, there is a certain difficulty in measuring the ripple. The stability of the ripple detection method will directly affect the anti-pinch method. The final execution has a certain impact;

[0004] The second is the anti-pinch method based on the motor current. The motor current is very easy to obtain through the AD conversion of the single-chip microcomputer, but the anti-pinch method based on the current is easy to affect the execution of the anti-pinch method due to start-up, bumps and other road conditions.

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