基于LoRa通信的无线液压支架压力传感器设计

李起伟

李起伟.基于LoRa通信的无线液压支架压力传感器设计[J].工矿自动化,2020,46(12):111-115.. DOI: 10.13272/j.issn.1671-251x.2020040021
引用本文: 李起伟.基于LoRa通信的无线液压支架压力传感器设计[J].工矿自动化,2020,46(12):111-115.. DOI: 10.13272/j.issn.1671-251x.2020040021
LI Qiwei. Design of wireless pressure sensor of hydraulic support based on LoRa technology[J]. Journal of Mine Automation, 2020, 46(12): 111-115. DOI: 10.13272/j.issn.1671-251x.2020040021
Citation: LI Qiwei. Design of wireless pressure sensor of hydraulic support based on LoRa technology[J]. Journal of Mine Automation, 2020, 46(12): 111-115. DOI: 10.13272/j.issn.1671-251x.2020040021

基于LoRa通信的无线液压支架压力传感器设计

基金项目: 

煤炭科学技术研究院技术创新基金资助项目(2019CX-I-08)

详细信息
  • 中图分类号: TD355.4

Design of wireless pressure sensor of hydraulic support based on LoRa technology

  • 摘要: 针对煤矿顶板压力监测系统中的无线ZigBee传感器使用时间达不到设计预期、需频繁更换电池的问题,设计了一种基于LoRa通信的无线液压支架压力传感器。内嵌LoRa模块的无线液压支架压力传感器安装在液压支架上,采集液压支架前支柱、后支柱及前伸梁的压力值。被测液体介质通过导压孔加压到传感器压阻元件上,压阻元件受压发生形变,产生与压力线性相关的阻值变化;传感器的微控制单元测量加在电阻上的电压,将其换算成实际压力值。该传感器实现了煤矿顶板压力监测信号的远距离、低功耗、高可靠性无线传输:通过高扩频因子的直接序列扩频技术提高接收端灵敏度,获得较高的信号增益,从而增加通信距离;通过前向纠错编码技术提高传输可靠性;采集液压支架压力值并成功发送数据后进入休眠模式,以降低功耗。测试结果表明,该传感器1 h的平均功耗为1.18 mA·h,容量为5 000 mA·h的锂电池理论续航时间为141 d,满足煤矿使用要求;与ZigBee技术相比,LoRa有效通信距离更远,可靠性更高。
    Abstract: In coal mine roof pressure monitoring system, the issues of wireless ZigBee sensors are not being long-lasting as designed and requiring frequent battery replacement. Hence, a wireless pressure sensor of hydraulic support based on LoRa technology is designed to address these problems. The wireless pressure sensor embedded LoRa module is installed on the hydraulic support to collect the pressure values of the front pillar, the rear pillar and the forepole. The measured liquid medium is pressurized to the piezoresistive element of the sensor through the pressure hole. The deformation of the piezoresistive element under pressure produces resistance change which is linearly related to pressure. The micro-control unit of the sensor measures the voltage which applied to the resistance and converts the voltage to the actual pressure value. The sensor achieves wireless long-range, low-power and high-reliability transmission of the coal mine roof pressure monitoring signal by using three methods: the direct sequence spread spectrum technology with high spread spectrum improves the sensitivity of the receiving end, achieves high signal gain and increases the communication distance; the forward error correction coding technology improves the transmission reliability; the sensor enters sleep mode to reduce the power consumption after collecting the pressure value of the hydraulic support and sending the data successfully. The test results show that the average power consumption of the sensor is 1.18 mA·h for 1 h and the theoretical endurance of the 5,000 mA·h lithium battery is 141 days. The sensor performance meets the need of coal mining. Comparing with ZigBee technology, LoRa shows better performance for long-range transmission and higher reliability.
  • 期刊类型引用(9)

    1. 王超伟. 基于LoRa技术的电流互感器内部压力监测装置的研究与应用. 自动化博览. 2024(05): 52-57 . 百度学术
    2. 刘伟. 基于PLC的化工提纯过滤器反冲洗控制系统. 自动化技术与应用. 2023(02): 71-75 . 百度学术
    3. 刘昕,赵天童,付元. 基于TOF/PDOA联合算法的二维精确定位一体化基站设计. 煤矿机械. 2023(10): 24-27 . 百度学术
    4. 李建,任怀伟,巩师鑫. 综采工作面液压支架状态感知与分析技术研究. 工矿自动化. 2023(10): 1-7+103 . 本站查看
    5. 张高峰. 基于无线传感网络的支架压力传感器设计. 机械工程与自动化. 2022(04): 205-206+211 . 百度学术
    6. 李华,王桂忠. 基于LoRa与CAN通信的液压支架压力传感器系统设计与试验. 煤矿机械. 2022(09): 18-21 . 百度学术
    7. 顾佳易,张日迪,彭紫东,张宇巍,辛欢,易越. 基于wM-BUS的水浸传感器扩频编码通信技术. 单片机与嵌入式系统应用. 2022(11): 88-91 . 百度学术
    8. 石丹丹,辛红霖,郭笙城,曾孟佳. 基于LoRa技术的篮球场使用情况监测系统设计. 计算机与网络. 2021(21): 60-64 . 百度学术
    9. 徐嫣涵,兰西柱,杨勇,王宇,李承军. 煤矿液压支架压力无线监测系统网关的设计. 现代信息科技. 2020(22): 48-50 . 百度学术

    其他类型引用(3)

计量
  • 文章访问数:  116
  • HTML全文浏览量:  16
  • PDF下载量:  30
  • 被引次数: 12
出版历程
  • 刊出日期:  2020-12-19

目录

    /

    返回文章
    返回