基于MSP430和TDC-GP21的超声波热量表设计

发布时间：2018-04-17 05:39

本文选题：热量表 + 超声波　；参考：《山东大学》2015年硕士论文

【摘要】：热量表是在供热系统中用于计量用户所在热交换系统中所消耗热量,并通过液晶屏显示用户所消耗热量、时间、进出水温度以及热量表编号等信息的仪表。近年来,随着中国城镇化进程的日益加快,由政府提倡的加快推进城镇供热系统迅速地发展开来。暖气越来越普遍的得到应用,但是在此过程中,也显现出一些问题,最严重的就是热量浪费,这一现象极其不利于低碳环保这一全社会共同关注的环境问题。所以,如何做到热量节俭成为社会关注的问题。传统的按供暖面积进行计费的方式是导致热量浪费的主要原因,而真正能解决资源浪费这一问题的唯一方式就是热量表到用户,按热量计费,实现一户一表,这样既能避免资源浪费,也能使用户更加方便清楚的了解自家的暖气使用情况。热量表按照工作原理可以分为超声波热量表,电磁式热量表和机械式热量表,而电磁式热量表及机械式热量表的缺点太明显,主要表现为机械磨损严重,功耗大,计量精度低等。随着科学技术的发展,超声波热量表解决了传统的热量表存在的问题,真正做到超低功耗,精确度高,抗干扰能力强,使用寿命长。本课题设计的超声波热量表,是利用超声波原理测得流体流速,进而得到流体流量,配合以成对温度传感器测得的进口温度和出口温度,最终通过积算仪来得到流经热交换系统所释放的热量,并配有按键功能以供用户清楚的看到进出口温度,流量,热量等数据信息。本文利用MSP430F417超低功耗单片机作为超声波热量表核心处理器,以皮秒级高精度TDC-GP21专用时间数字转换芯片来测量流体流量以及进出口温度。并通过专用仪表总线M-BUS与外部进行通信。经过实验检定,本课题设计的超声波热量表精度能达到国家要求,并且功耗低,成本得到有效控制。
[Abstract]:The heat meter is used to measure the heat consumption in the heat exchange system in the heating system, and display the information of the heat consumption, time, water temperature and heat meter number of the user through the LCD screen.In recent years, with the acceleration of urbanization in China, the government advocated the rapid development of urban heating system.Heating is more and more widely used, but in the process, there are some problems, the most serious is heat waste, this phenomenon is extremely unfavorable to low-carbon environmental protection, which is a common concern of the whole society.Therefore, how to achieve heat thrift has become a social concern.The traditional way of charging according to the heating area is the main cause of heat waste, but the only way to solve the problem of waste of resources is to get the heat meter to the user, to charge according to the heat, and to realize one meter per household.This can not only avoid the waste of resources, but also make it easier for users to understand the use of their own heating.According to the working principle, the heat meter can be divided into ultrasonic heat meter, electromagnetic heat meter and mechanical heat meter, but the disadvantages of electromagnetic heat meter and mechanical heat meter are too obvious.The measurement accuracy is low.With the development of science and technology, ultrasonic calorimeter solves the problems of traditional calorimeter. It can really achieve ultra-low power consumption, high precision, strong anti-interference ability and long service life.The ultrasonic heat meter designed in this paper uses the ultrasonic principle to measure the flow velocity of the fluid, and then obtains the flow rate of the fluid, and matches the inlet temperature and the outlet temperature measured by the pair of temperature sensors.Finally, the heat released through the heat exchange system is obtained by the integrator, and the key function is provided for the user to clearly see the data information of the inlet and outlet temperature, flow rate, heat and so on.In this paper, MSP430F417 microcontroller is used as the core processor of ultrasonic calorimeter, and the flow rate and inlet and outlet temperature are measured by picosecond high precision TDC-GP21 special time digital conversion chip.And through the special instrument bus M-BUS to communicate with the external.After experimental verification, the precision of the ultrasonic heat meter designed in this paper can meet the national requirements, and the power consumption is low, and the cost is effectively controlled.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU833.1

【相似文献】