Because the abnormal door close phenomenon happens not very offen, so maybe it was caused by a random reason, it should be judged as neither a problem of soft signal, nor of hard signal.
由于不正常关门现象发生的次数比较少可能是由于一个随机性的原因产生 的故障。所以仅仅从这次实验不能说明是软信号有问题，也不能证明硬信号 有问题。
Because the abnormal door close phenomenon happens not very offen, so maybe it was caused by a random reason, it should be judged as neither a problem of soft signal, nor of hard signal.
由于不正常关门现象发生的次数比较少可能是由于一个随机性的原因产生 的故障。所以仅仅从这次实验不能说明是软信号有问题，也不能证明硬信号 有问题。
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