当超声波模块与障碍物之间的距离超过设置的上限值或者下限值时，蜂鸣器发出报警。
When the ultrasonic distance between the module and the obstacle exceeds the upper limit or lower limit, the buzzer alarm.
具有断电报警，将组织放在设定的液体中保护起来，障碍保护等安全保护功能。
With a power failure alarm, to protect the tissue in set liquid, provide failure protection and other security protection.
当物流运输装置在前进时遇到障碍时，则采用图像和光电传感器双重识别，使运输装置自动停止，并发出报警信号。
When the device meet the obstacle while moving forward, it can stop and alarm automatically through the image and optical electrical sensors which perform dual identify.
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