面向智能闸水位测量应用的投入式水位计设计

发布时间：2018-03-29 13:47

本文选题：水位测量　切入点：传感器　出处：《北方工业大学》2017年硕士论文

【摘要】：远程测控智能闸是一款国内自主研发的灌区调水和水域管理信息化的产品,该闸门基于自动化闸门控制系统融合了物联网技术,实现了闸门的自动控制,分水量的精确测量。除此之外,智能闸还利用以太网和无线互联等技术实现了流域内闸门的协同控制。远程自动计量闸设计极大程度上提升了水域水资源的利用率和水域管理信息化水平。目前,该闸门在山西内蒙古等地的灌区取得了广泛的应用。在智能闸项目中,闸前与闸后的液位对于闸门的启闭以及地区的供水量计算起着关键的作用。随着测控系统精度越来越高对传感器参数的要求也越来越高。目前,国内的液位传感器仍存在着一定的不足,并且针对野外的智能闸使用的就更少了。因此,开发了一种面向智能闸使用的投入式水位计。论文主要研究内容是解决使用在智能闸上的常见投入式液位计所存在的问题,设计了机械部分、硬件电路、软件部分以及补偿算法。具体内容有一下几个方面:(1)机械机构设计:结合投入式液位传感器的工作空间大小以及密封需求,利用机械设计软件solidworks设计出该传感器的机械结构部分,设计时将投入式液位计易发生密封失效的薄弱环节重点考虑。(2)硬件电路设计:本设计用Altium Designer 16完成硬件电路的设计,硬件电路以STM32F100CBT6为处理芯片。该硬件电路包括+5V、-5V和+3.3V电源电路,基于仪表放大器AD8639的精确放大电路,RS485通讯模块等构成。(3)软件部分设计:利用软件开发平台Keil5.0进行传感器内部程序的设计,程序实现信号的采集、滤波、补偿。为减少传感器的误差提升传感器的精度,对采集到的信号进行防脉冲干扰平均值滤波和BP神经网络的温度补偿。(4)搭建实验平台:通过搭建实验平台,实现对设计的投入式液位计进行密封性能、精度、线性度的测试,并对结果进行了分析。实验结果表明,本设计解决了之前使用传感器所存在的密封问题,提升传感器的精度和稳定性,能够满足智能闸测量水位使用。
[Abstract]:Remote monitoring and control intelligent gate is a kind of water diversion and water area management information product developed by our country. The gate is based on the automatic gate control system, which integrates the technology of Internet of things and realizes the automatic control of the gate. Accurate measurement of water distribution. In addition, The intelligent gate also realizes the cooperative control of the gate in the watershed by using the technology of Ethernet and wireless interconnection. The design of remote automatic metering gate greatly improves the utilization rate of water resources and the level of water management information. At present, The gate has been widely used in irrigation areas such as Shanxi and Inner Mongolia. The liquid level before and after the gate plays a key role in the gate opening and closing and the calculation of water supply in the area. With the increasing accuracy of the measurement and control system, the requirements of the sensor parameters are becoming higher and higher. There are still some deficiencies in domestic liquid level sensors, and the use of intelligent gates in the field is even less. An input water level meter for intelligent gate is developed in this paper. The main research content of this paper is to solve the problems existing in the common input liquid level meter used in intelligent gate, and design the mechanical part and hardware circuit. Software part and compensation algorithm. There are several aspects of the mechanical mechanism design: combined with the size of the workspace of the input liquid level sensor and sealing requirements, The mechanical structure of the sensor is designed by using the mechanical design software solidworks. The weak link of the input-type liquid level meter which is prone to seal failure is considered emphatically in the design. The hardware circuit is designed with Altium Designer 16. STM32F100CBT6 is used as the processing chip in the hardware circuit. The hardware circuit includes 5V -5V and 3.3V power supply circuit. The software design of the precise amplifier circuit RS485 communication module based on instrument amplifier AD8639 is as follows: the software development platform Keil5.0 is used to design the internal program of the sensor, and the program realizes the signal acquisition and filtering. In order to reduce the error of the sensor and improve the accuracy of the sensor, the experimental platform is built by filtering the average value of anti-pulse interference and the temperature compensation of BP neural network. The sealing performance, precision and linearity of the designed input level gauge are tested, and the results are analyzed. The experimental results show that the design solves the sealing problem existing in the previous use of the sensor. The accuracy and stability of the sensor can be improved to meet the use of intelligent sluice to measure the water level.
【学位授予单位】：北方工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV66

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