| 矿用围岩应力传感器设计与试验 |
投稿时间：2020-05-10 修订日期：2020-06-10  点此下载全文 |
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| 基金项目:天地科技股份有限公司科技创新创业资金专项重点项目(2019-TD-ZD007),重庆市煤炭发展专项资金项目(渝(煤)[2020]-kj-13) |
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| 中文摘要:为了有效监测煤体内应力变化情况,解决现有机械式围岩应力计无法实时监测上传、电阻应变式围岩应力传感器因自身被动受力的结构设计长期不能真实反映围岩应力的变化情况的安全隐患问题,设计了一种采用主动承压式结构和压电电阻检测原理的围岩应力传感器。详细介绍了降压转换电路、遥控接收电路、油囊组件及元件信号处理电路、数码管显示电路、报警电路、RS485通讯接口电路六部分硬件电路方案,各部分电路关键元器件选型,以及传感器的软件流程。实验室测试结果表明,传感器具有功耗低、检测精度高的特点。 |
| 中文关键词:围岩应力 压电电阻 主动承压 差分放大 遥控接收 |
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| Design and Test of Stress Sensor for Mine Surrounding Rock |
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| Abstract:In order to effectively monitor the change of the stress in the coal body, solve the problem that the existing mechanical stress meter can"t real-time monitor the upload and the resistance strain type stress sensor can"t truly reflect the change of the stress in the surrounding rock for a long time because of the structure design of its own passive stress, and design a kind of active pressure type structure and piezoelectric resistance detection principle of the stress sensor in the surrounding rock. This paper introduces in detail six parts of hardware circuit scheme, including step-down conversion circuit, remote control receiving circuit, oil bag component and component signal processing circuit, nixie tube display circuit, alarm circuit, RS485 communication interface circuit, the selection of key components of each part of the circuit, and the software flow of the sensor. The experimental results show that the sensor has the characteristics of low power consumption and high detection accuracy. |
| keywords:surrounding rock stress piezoelectric resistance active pressure differential amplification remote control receiving |
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