基于MSP430单片机的测距系统

发布时间：2018-06-10 20:52

本文选题：测距系统 + 放大电路　；参考：《河北工业大学》2012年硕士论文

【摘要】：液位测量技术在工业生产中占有重要的地位，随着工业水平的不断发展，测量技术逐渐由手动变为自动，由传统的不科学变为更具有科学性可依的测量方法。本文主要介绍测距系统的单片机控制模块，4-20mA电流转换模块，电源模块，太阳能供电模块，液晶显示模块，升压电路模块，三级放大电路模块，温度补偿系统模块，KALMAN算法数据处理等几大关键核心模块。首先完成单片机控制模块的设计，，控制模块主要负责计算测距系统到被测液面的距离。24V电源模块是将输入的24V电压转换成电路需要的电压值。太阳能供电模块主要目的是解决偏远地区无法正常供电时的电池供电情况。液晶显示模块主要方便现场对液位测距系统参数的设置，及现场采集到的数值与中控室数据的对照。其次完成升压模块的电路设计，将系统产生的电压进行大幅度的提升激励探头产生用于测量的超声波，超声波经过被测液面后，返回的微弱波经过三级放大电路放大还原后送入单片机做进一步计算。在计算过程中使用温度补偿系统采集到的数值对数据进行校正。最终使用Kalman算法对测量的数值进行进一步的精确分析，得出一个精度相对较高的液位高度值，通过4-20mA电流转换模块将高度数值转化成电流值传送至中控室进行液位监测。基于超声波的测距系统的超声波液位计具有成本低，技术要求不高，工作稳定性强，易于操作等几个方面的特点，被广泛应用于测量的各个领域。但其普遍存在受环境温度影响大、精度不高几个方面的缺点。因此研究带自身校准功能的超声波液位计具有重要意义。课题对超声波液位计进行理论分析，硬件结构系统设计，Kalman算法数据分析，整机调试，达到预期目标。实现了对液位环境的低误差测量，具有一定的使用价值。
[Abstract]:Liquid level measurement technology plays an important role in industrial production. With the continuous development of industrial level, the measurement technology is gradually changed from manual to automatic, from traditional unscientific to more scientific. This paper mainly introduces the SCM control module, 4-20mA current conversion module, power module, the sun. The power supply module, the LCD module, the boost circuit module, the three stage amplifier module, the temperature compensation system module, the KALMAN algorithm data processing and other key core modules.
First of all, the design of the MCU control module is completed. The control module is mainly responsible for calculating the distance between the distance measuring system and the measured level. The.24V power module is the voltage value that converts the input 24V voltage to the circuit. The main purpose of the solar power supply module is to solve the battery power supply when the remote area is unable to supply the normal power. The LCD module is the main purpose of the solar power supply module. It is mainly convenient to set up the parameters of the liquid level distance measuring system, and compare the data collected in the field with the data of the control room. Secondly, the circuit design of the lift module is completed, and the voltage generated by the system is greatly enhanced by the excitation probe for measuring ultrasonic wave. After the ultrasonic wave passes the measured surface, the return of the weak wave passes three. The level magnifying circuit is amplified and reduced to the single chip microcomputer for further calculation. In the process of calculation, the data collected by the temperature compensation system are corrected. Finally, the Kalman algorithm is used to further analyze the measured values, and a relatively high level of level of liquid level is obtained, and the 4-20mA current conversion module is used. The ultrasonic liquid level meter based on ultrasonic ranging system has the characteristics of low cost, low technical requirement, strong working stability, easy to operate and so on, which is widely used in various fields of measurement, but it is widely influenced by ambient temperature and fine. Therefore, it is of great significance to study the ultrasonic level gauge with its own calibration function.
In this paper, the theoretical analysis of the ultrasonic liquid level meter, the design of the hardware structure system, the data analysis of the Kalman algorithm, the whole machine debugging, have reached the expected goal, and the low error measurement for the liquid level environment has been realized, which has a certain value of use.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP274;TP368.12

【参考文献】