CN101148965B - Vehicle window drive clamping-proof control system - Google Patents

Abstract

The present invention is squeeze preventing automobile window driving system and control method, and relates to squeeze preventing automobile window driving technology. The system includes one microprocessor circuit, one intelligent feedback power chip, one multiway switch detection interface circuit, one window top touch switch, one test switch, one window bottom touch switch, one window ascent switch and one window descent switch connected together. The control method includes the following steps: for the microprocessor circuit to detect braking current value for N times and normal resistance current value for N times and to store the calculated threshold value in a flash memory; to compare with the reference current value in the flash memory, and to rotate the motor inversely to execute the squeeze preventing function if the calculated threshold value is greater. The present invention has high antipinching precision and capacity of automatically updating threshold value with operation of the automobile window.

Description

Vehicle window drive clamping-proof control system

Technical field

What the present invention relates to is the technical field that automotive window drives anti-pinch control.

Background technology

Existing automotive window drives anti-jamming device and mainly is divided into: infrared sensing formula, Current feedback, and described infrared sensing formula can't be applied because of its cost is too high; Though the Current feedback cost is low, but its anti-pinch precision is too low, obtaining reference current threshold value Imax is to carry out a large amount of test jobs, and each vehicle window is after installation, resistance suffered in rotation process has nothing in common with each other, fixing reference current threshold value Imax is inevitable to produce error for the bigger vehicle window environment of some resistance, makes a mistake to judge and cause vehicle window to close.In continuous variation along with aging, vehicle window motor suffered resistance in rotation process of the use of vehicle window, device, make resistance become big or diminish, and cause the reference current threshold value Imax that fixes to become inaccurate along with the use of system, finally cause and can't use.

Summary of the invention

The present invention is that existing infrared sensing formula automotive window driving anti-jamming device can't be applied because of its cost is too high and Current feedback automotive window driving anti-jamming device existence acquisition reference current threshold value Imax is the shortcoming that need carry out a large amount of test jobs in order to overcome; Solution is in the continuous variation along with aging, Car window electric machine suffered resistance in rotation process of the use of vehicle window, device, make resistance become big or diminish, become inaccurate along with the use of system and fixing reference current threshold value Imax takes place, finally cause the problem that to use.And then a kind of vehicle window drive clamping-proof control system proposed.

System of the present invention detects interface circuit 3, vehicle window top contact-making switch 4, Test Switchboard 5, vehicle window bottom contact-making switch 6 by current feedback smart power chip 1, micro-control processor circuit 2, variable connector, and vehicle window rising switch 7, vehicle window decline switch 8 are formed;

The just commentaries on classics control output end of just changeing control input end connection micro-control processor circuit 2 of current feedback smart power chip 1, the counter-rotating control input end of current feedback smart power chip 1 connects the counter-rotating control output end of micro-control processor circuit 2, the motor current signal output of current feedback smart power chip 1 connects the motor current signal input of micro-control processor circuit 2, the switching value data input bus end of micro-control processor circuit 2 connects the switching value data output bus end that variable connector detects interface circuit 3, variable connector detects the output of the first via switch interface end connection vehicle window top contact-making switch 4 of interface circuit 3, variable connector detects the output of the second way switch interface end connection Test Switchboard 5 of interface circuit 3, variable connector detects the output of the Third Road switch interface end connection vehicle window bottom contact-making switch 6 of interface circuit 3, variable connector detects the output of the four-way switch interface end connection vehicle window rising switch 7 of interface circuit 3, and variable connector detects the output of the 5th way switch interface end connection vehicle window decline switch 8 of interface circuit 3.

Anti-pinch precision height of the present invention, it can just can obtain reference current threshold value Imax in a spot of test and in the short time, it can adjust automatically and upgrade reference current threshold value Imax along with the continuous variation of aging, vehicle window motor suffered resistance in rotation process of the use of vehicle window, device, makes its can work steady in a long-term.It also has advantage cheap, simple in structure, easy to use.

Description of drawings

Fig. 1 is an integrated circuit structural representation of the present invention.

The specific embodiment

The specific embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment detects interface circuit 3, vehicle window top contact-making switch 4, Test Switchboard 5, vehicle window bottom contact-making switch 6 by current feedback smart power chip 1, micro-control processor circuit 2, variable connector, and vehicle window rising switch 7, vehicle window decline switch 8 are formed;

The just commentaries on classics control output end of just changeing control input end connection micro-control processor circuit 2 of current feedback smart power chip 1, the counter-rotating control input end of current feedback smart power chip 1 connects the counter-rotating control output end of micro-control processor circuit 2, the motor current signal output of current feedback smart power chip 1 connects the motor current signal input of micro-control processor circuit 2, the switching value data input bus end of micro-control processor circuit 2 connects the switching value data output bus end that variable connector detects interface circuit 3, variable connector detects the output of the first via switch interface end connection vehicle window top contact-making switch 4 of interface circuit 3, variable connector detects the output of the second way switch interface end connection Test Switchboard 5 of interface circuit 3, variable connector detects the output of the Third Road switch interface end connection vehicle window bottom contact-making switch 6 of interface circuit 3, variable connector detects the output of the four-way switch interface end connection vehicle window rising switch 7 of interface circuit 3, and variable connector detects the output of the 5th way switch interface end connection vehicle window decline switch 8 of interface circuit 3.The just commentaries on classics of just changeing drive output connection motor 9 of current feedback smart power chip 1 drives input, and the counter-rotating that the counter-rotating drive output of current feedback smart power chip 1 connects motor 9 drives input, the earth terminal ground connection of motor 9.

The model that described current feedback smart power chip 1 is selected for use is MC33887, and the model that micro-control processor circuit 2 is selected for use is MC68HC908GZ16, and the model that variable connector detection interface circuit 3 is selected for use is MC33884.

The step of vehicle window drive clamping-proof control method of the present invention is:

Step 1, power up the startup whole system;

Step 2, micro-control processor circuit 2 detect interface circuit 3 by variable connector and judge whether Test Switchboard 5 is opened, and judged result then enters test mode for being, promptly operating procedure three, and judged result is for denying then direct operating procedure four;

Step 3, rise and descend by vehicle window rising switch 7, vehicle window decline switch 8 control vehicle windows, the braking current value of micro-control processor circuit 2 contact-making switch 6 measurement motor 9 bottom vehicle window top contact-making switch 4, vehicle window N time, and calculate average smooth value-Imax_avg its N time, its design formulas is:

Measure vehicle window normal resistance current value I nomN time of when operation motor 9 that normally rises simultaneously, and calculate average smooth value-Inom_avg its N time, its design formulas is: Calculate the threshold value by Imax_avg and Inom_avg, its design formulas is: The threshold value that calculates is deposited in the Flash memory cell in the micro-control processor circuit 2 as the reference current threshold value in operating procedure nine;

Step 4, micro-control processor circuit 2 judge whether vehicle window rising switch 7 or vehicle window decline switch 8 are connected, and judged result is access failures all, and then micro-control processor circuit 2 continues standbies, operating procedure nine;

Judge that vehicle window decline switch 8 is for connecting, judge again then whether vehicle window bottom contact-making switch 6 is connected, judge that vehicle window bottom contact-making switch 6 is for connecting, then micro-control processor circuit 2 continues standby, operating procedure nine, judge vehicle window bottom contact-making switch 6 for disconnecting, then micro-control processor circuit 2 makes vehicle window descend operating procedure nine by 9 counter-rotatings of current feedback smart power chip 1 control motor;

Judge that vehicle window rising switch 7 is for connecting, judge again then whether vehicle window top contact-making switch 4 is connected, judge that vehicle window top contact-making switch 4 is for connecting, then micro-control processor circuit 2 continues standby and operating procedure five, judge that vehicle window top contact-making switch 4 is for disconnecting, then micro-control processor circuit 2 is just changeing by current feedback smart power chip 1 control motor 9 vehicle window is risen, micro-control processor circuit 2 reads in the current feedback Value Data of current feedback smart power chip 1 simultaneously, compare with the reference current threshold value among the current flash, feedback current is then carried out pinch resistant functionality greater than reference current thresholding among the flash, be motor 9 counter-rotatings, operating procedure six;

Step 5, micro-control processor circuit 2 time-delay 10ms, the braking current value Imax of measurement motor 9, max_test_flag=1, operating procedure seven;

Normal resistance current value I nom-when step 6, micro-control processor circuit 2 regularly measured vehicle window and risen, and averaged Inom_avg, its design formulas is: average current

Nom_test_flag=1, operating procedure seven;

Step 7, micro-control processor circuit 2 are according to max_test_flag=1 ﹠amp; Nom_test_flag=1 reaches Inom and Imax and calculates current threshold current value, and its design formulas is: I _Clip≈ I _Normal+ (I _Max-I _Normal)/3;

Step 8, micro-control processor circuit 2 are weighted the former benchmark threshold value of average back replacement with former benchmark threshold value in the Flash memory cell and current threshold value, and its design formulas is: $\stackrel{\‾}{I_{\mathrm{clip}\_\mathrm{new}}}=\frac{(N_{\mathrm{test}}-1)*\stackrel{\‾}{I_{\mathrm{clip}}}+I_{\mathrm{clip}\_\mathrm{new}}}{N_{\mathrm{test}}};$

Step 9, return operating procedure two.

Claims (1)

1. vehicle window drive clamping-proof control system, it detects interface circuit (3), vehicle window top contact-making switch (4), Test Switchboard (5), vehicle window bottom contact-making switch (6) by current feedback smart power chip (1), micro-control processor circuit (2), variable connector, and vehicle window rising switch (7), vehicle window decline switch (8) are formed;

It is characterized in that the just commentaries on classics control input end of current feedback smart power chip (1) connects the just commentaries on classics control output end of micro-control processor circuit (2), the counter-rotating control input end of current feedback smart power chip (1) connects the counter-rotating control output end of micro-control processor circuit (2), the motor current signal output of current feedback smart power chip (1) connects the motor current signal input of micro-control processor circuit (2), the switching value data input bus end of micro-control processor circuit (2) connects the switching value data output bus end that variable connector detects interface circuit (3), variable connector detects the output of the first via switch interface end connection vehicle window top contact-making switch (4) of interface circuit (3), variable connector detects the output of the second way switch interface end connection Test Switchboard (5) of interface circuit (3), variable connector detects the output of the Third Road switch interface end connection vehicle window bottom contact-making switch (6) of interface circuit (3), variable connector detects the output of the four-way switch interface end connection vehicle window rising switch (7) of interface circuit (3), and variable connector detects the output of the 5th way switch interface end connection vehicle window decline switch (8) of interface circuit (3).

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