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Anti-pinch skylight control method

A control method and sunroof technology, applied in the field of vehicle applications, to achieve the effect of obstacle detection and good obstacle detection

Inactive Publication Date: 2017-02-15
上海车亿谷企业管理股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the product must include a circuit for sampling and filtering the coil current

Method used

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  • Anti-pinch skylight control method

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Embodiment Construction

[0044] Anti-pinch sunroof controller, the principle of anti-pinch sunroof is as follows figure 1 Shown:

[0045] The MCU obtains the motor speed through the Hall sensor.

[0046] Hall sensor and motor installation position such as figure 2 Shown:

[0047] Calculate the speed ω of the motor through the output square wave of the Hall sensor.

[0048] Skylight movement speed V=ω*K. The K constant is related to the reduction ratio of the motor and the diameter of the motor. Corresponding to the same skylight system can be regarded as a structural constant.

[0049] Skylight motion acceleration a=△V / △t.

[0050] Motor voltage balance equation: E=Ea+Ia*Ra

[0051] E: power supply voltage

[0052] Ea: motor coil voltage

[0053] Ia: coil current

[0054] Ra: system internal resistance

[0055] Motor torque equation: Ea*Ia=Te*ω

[0056] Ea: motor coil voltage

[0057] Ia: coil current

[0058] Te: motor torque

[0059] ω: motor speed

[0060] From this, it is obtained...

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Abstract

The invention discloses an anti-pinch skylight control method. For achieving the method, a controller is mainly adopted for driving a direct current motor to operate so as to push a skylight to be opened and closed. Meanwhile, the controller is used for calculating the current position of the skylight through a hall sensor, the position is determined through a learning mode, and the current operation speed and the current acceleration of the skylight are obtained. The controller reads current friction force according to the current position of the skylight, and the friction force is stored in a storage as data in the learning mode. The controller can calculate current obstacle resistance through obtained parameters and a thrust equation formula. The controller judges whether an anti-pinch action needs to be executed, namely whether the motor is reversely driven, to make the skylight to operate reversely or not according to an obstacle resistance threshold value. According to the anti-pinch skylight control method, obstacle detection is well achieved through software algorithm processing instead of existing modes.

Description

technical field [0001] The invention relates to a method for controlling an anti-pinch sunroof, which belongs to the technical field of vehicle applications. Background technique [0002] At present, sunroofs are basically common in passenger cars and are in great demand. Therefore, the demand for sunroof control is also great. The anti-pinch sunroof control was developed for this market. It can provide good control performance and has very reliable anti-pinch function. [0003] At present, a considerable part of the automatic sunroof does not have the anti-pinch function, which has potential safety hazards. The anti-pinch sunroof controller can solve this potential safety hazard very well. [0004] Most of the anti-pinch sunroof controllers currently on the market detect the current of the motor coil, and realize the judgment of obstacles through the change of the current. In this way, the product must include circuits for sampling and filtering the coil current. Con...

Claims

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Application Information

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IPC IPC(8): B60J7/057B60J7/00
CPCB60J7/00B60J7/0573
Inventor 黄踔李波
Owner 上海车亿谷企业管理股份有限公司
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