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On line monitoring device of bolt pressing force

机译：螺栓压力线监测装置

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Aiming at the problem of loose bolt connection in engineering, an on-line monitoring device of bolt tightening force based on piezoelectric effect is designed. The device uses two piezoelectric ceramics as the core of the sensor, one as the active chip to generate ultrasonic wave, and the other as the receiving chip to receive the ultrasonic output electrical signal. The device analyzes the electrical signal related to the connection state output from the receiving chip on the built-in circuit board, and then sends the data which can represent the bolt connection state after analysis to the remote receiver in a wireless way, and gives an alarm at the receiving end for the data exceeding the threshold value. In addition, the device can automatically switch between working mode and sleep mode, greatly reducing power consumption, and can work for a long time with solar power supply system, without frequent battery replacement. The experimental results show that the device can evaluate the current connection state of bolts and work stably for a long time. It has a good prospect in the field of bolt connection condition monitoring.
机译：针对工程中螺栓连接松动的问题，设计了基于压电效应的螺栓紧固力的在线监测装置。该装置使用两个压电陶瓷作为传感器的核心，作为有源芯片，以产生超声波，另一个作为接收芯片接收超声波输出电信号。该器件分析与内置电路板上的接收芯片输出的连接状态相关的电信号，然后将数据发送到以无线方式分析到远程接收器之后的螺栓连接状态，并给出在收到端的报警以超过阈值的数据。此外，该装置可以自动在工作模式和睡眠模式之间切换，大大降低功耗，并且可以使用太阳能电源系统长时间工作，而无需频繁的电池更换。实验结果表明，该装置可以评估螺栓的电流连接状态并稳定地工作很长时间。它在螺栓连接条件监控领域具有良好的前景。

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