| 摘要 |
PURPOSE:To simplify a control device by using a servo capacitance type acceleration sensor as an acceleration sensor, and inputting a pulse width modulation signal of a capacitance servo circuit as a sensor detecting signal to a waveform shaping circuit. CONSTITUTION:An output signal of a pulse width modulator 8 of a capacitance- type acceleration sensor 10 is directly taken into a control circuit 20 since it is a digital signal, and digitally operated. A pulse edge of the voltage input to the circuit 20 is shaped by a waveform shaping circuit 22 and input to a digital input port 23. The circuit 20 knows when a vehicle wheel is locked at the breaking time from operations of detecting signals of a velocity sensor or the like and detecting signals of the acceleration sensor 10, with outputting a control signal to release the lock of the vehicle wheel to an object 21 to be controlled from an output port 24. Since the output of the acceleration sensor is directly taken into the control device, the control device is simplified, thereby lowering the manufacturing costs. |
