GPRS技术的超声波液位监测系统设计
2020-09-02胡红旗
胡红旗



摘要:
为实现工业现场物料和液位远程实时监控,以STM32单片机为控制核心,采用时差法超声波测距原理结合GPRS技术实现超声波液位监测系统设计,实时采集数据通过互联网传递给监控端,实现远程监控并做实时记录。为降低温度对测距精度的影响,增加了温度补偿电路。上位机采用LabView软件开发,便于管理人员监控。该系统解决了传统现场仪表反馈不及时、布线复杂等问题。经测试表明系统运行正常,具有较好的精确性和稳定性,适合工业现场安装使用。
关键词:
液位監测; 超声波测距; GPRS; LabView
中图分类号: TP273
文献标志码: A
Design of Ultrasonic Liquid Level Monitoring System Based on GPRS
HU Hongqi
(Department of Electronic Engineering, Yantai Automobile Engineering Professional College, Yantai, Shandong 265500, China)
Abstract:
In order to realize the remote monitoring of material and liquid level in industrial field, the ultrasonic liquid level monitoring system was designed by GPRS technology and combined with the ultrasonic distance measurement technology. The STM32 is used as the core unit, the realtime data aretransmitted to the monitoring terminal through the Internet to realize remote monitoring and realtime recording. In order to reduce the influence of temperature on ranging precision, the temperature compensation circuit is added. LabView software is usedand it is easy monitoring by managers. Test results show that the system is running normally and has good accuracy and stability.
Key words:
level monitoring; ultrasonic ranging; GPRS; LabView
0引言
如今,随着智能技术和计算机技术飞速发展,工厂管理越来越趋于无人化、网络化、智能化,为便于生产设备管理,保障生产线的正常平稳运行,智能化仪表显得尤为重要。尤其是液位参数的测量在化工、石油、污水处理等工厂企业的工业生产中至关重要。液位仪表按照感应元件与被测液位是否接触可分为接触式和非接触式。接触式仪表常用的有人工检尺法、伺服式、浮子测量、电容式、磁致伸缩式,由于传统液位检测仪测量精度低,且不利于工业现场实时监测[13]。鉴于超声波式非接触型液位模块具有测量范围宽、介质特性影响小;GPRS网络覆盖范围广、实时在线等优点,本文采用GPRS无线通讯技术融合非接触式超声波测量技术实现物料和液位高度测量。系统以STM32为核心控制模块,依据时差法超声波测距原理实现液面高……
