| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a grounding detector for a vehicle which can detect an occurrence of grounding or an increase in vehicle's capacity with high accuracy. <P>SOLUTION: In the grounding detector for a vehicle, a plus terminal of a DC power source 1 is connected to a side of one end of a coupling capacitor C1, and a rectangular wave pulse signal is applied to a measurement point A positioned on the other end side of the coupling capacitor C1 and detects a voltage signal generated at the measurement point A, thereby detecting the grounding of the DC power source 1. A voltage difference VP-P between a voltage VH being measured at the measurement point at the point of time when a rectangular wave pulse signal becomes a first phase and a voltage value VL measured at the measurement point A at the point of time when the rectangular wave pulse signal becomes a second phase is obtained, and the grounding of the DC power source 1 is detected based on that voltage difference VP-P. <P>COPYRIGHT: (C)2003,JPO</p> |
