Electric window anti-trap control method and system
A control method and electric vehicle technology, applied in door/window accessories, power control mechanism, building, etc., can solve problems such as poor anti-interference, high environmental requirements for non-contact detection technology, and complicated program design
Active Publication Date: 2021-07-06
WUHAN UNIV OF TECH
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[0005] However, the above-mentioned detection technology has the following disadvantages: the non-contact detection technology has high environmental requirements, and it is difficult to guarantee normal operation under harsh and extreme conditions; in the contact detection technology, the Hall sensor detection requires the installation of a magnetic ring on the motor shaft. High cost and low precision; current ripple detection does not need to install additional sensors, but the anti-interference is poor, and the program design of the two schemes is complicated, and EPROM needs to be used to record thresholds to achieve self-learning, and requires users to perform complex initialization operations
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[0045] Optimizing the above scheme, in the step S1, the specific method of establishing the corresponding relationship table between temperature and current threshold coefficient is: S10, establishing the current model of the electric window lift motor; S11, testing the motor under a certain ambient temperature by experiment Current threshold; S12, obtain the parameters of the current model through the system identification tool; S13, calculate the current threshold coefficient of the motor at this ambient temperature according to the parameters and the motor current threshold at a certain temperature; S14, repeat the steps of S11 Go to the step S13, and the test temperature of the step S11 is different each time the step is repeated, so as to obtain a corresponding relationship table between each ambient temperature and the current threshold coefficient of the motor. In this embodiment, according to the current characteristics of the DC motor, the current at the start-up stage...
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The invention relates to the technical field of automobiles, and provides an anti-pinch control method for electric vehicle windows, which includes the following steps: five steps S1 to S5. The invention also provides an electric window anti-pinch control system, which includes an MCU controller, a temperature measurement module and a current detection and processing module. The invention establishes the corresponding relationship table between temperature and current threshold coefficient, simplifies the initialization setting of the electric window self-learning, and also reduces the complexity of the controller software design; based on the ripple current detection technology, no special motor or installation is required Hall sensor to reduce the cost of the anti-trap system; through the test data in the early stage of controller software design, the DC motor current model is established, including the influence of the window lift mechanism and the friction between the glass and the window frame on the current threshold, to improve The accuracy of the control system; the influence of temperature on the threshold is considered to ensure the reliability and accuracy of the anti-pinch function.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to an electric window anti-pinch control method and system. Background technique [0002] With the continuous development of automotive electronic technology, the demand for driving safety and comfort is increasing. In order to solve the potential safety hazards of electric windows, especially the potential threat to children's safety, many passenger cars have adopted electric windows with anti-pinch function. [0003] At present, the anti-pinch function detection technology of automobile power windows includes two categories: non-contact and contact. [0004] Non-contact detection technology mainly uses infrared sensors, electromagnetic sensors, etc. to detect whether there are foreign objects within the moving range of the window. The contact detection technology is mainly in the process of raising the window, when the window is subjected to a large resistance in the anti-pi...
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IPC IPC(8): E05F15/44
CPCE05F15/443
Inventor 莫易敏孔祥馗张鸿夏凯吴疆
Owner WUHAN UNIV OF TECH