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Invention Grant
CN107045090B 熔接探测装置以及熔接探测方法 有权

熔接探测装置以及熔接探测方法
Abstract:
本发明提供一种熔接探测装置以及熔接探测方法，能精度良好地进行SMR熔接探测。熔接探测装置具有测量部(14c)和判定部(14d)。车辆包含电源、电容器、负载电路、连接电源和负载电路的开关及车辆的车身接地。测量部(14c)在将开关控制为第1状态的状态下，测量使电源、电容器及车身接地串联连接而被充电的电容器的第1电压。此外，测量部(14c)在将开关控制为第2状态的状态下，以给定定时为契机来测量使电源、电容器及车身接地串联连接而被充电的电容器的第2电压。判定部(14d)在第1电压与第2电压的电压差为给定阈值以下的情况下，进行熔接判定以判断开关是否处于接通时的熔接状态，在电压差超过给定阈值的情况下，判定为开关不处于熔接状态。
Abstract(English):

A weld detection apparatus is mounted on a vehicle and measures first and second voltages of a first capacitor. The first voltage is measured when the first capacitor is charged while connected in series to a power supply and a ground of a vehicle body while switches that connect the power supply to a load circuit are controlled to be in a first state. The second voltage is measured at a predetermined timing, when the first capacitor is charged while connected in series to the power supply and the ground of the vehicle body while the switches are controlled to be in a second state different from the first state. The apparatus performs a weld detection process to decide which of the switches is welded in an ON-state when a difference between the first and second voltages is equal to or smaller than a predetermined threshold value.

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