本文選題：熱量表 + 超聲波�。� 參考：《山東大學》2015年碩士論文

【摘要】：熱量表是在供熱系統(tǒng)中用于計量用戶所在熱交換系統(tǒng)中所消耗熱量,并通過液晶屏顯示用戶所消耗熱量、時間、進出水溫度以及熱量表編號等信息的儀表。近年來,隨著中國城鎮(zhèn)化進程的日益加快,由政府提倡的加快推進城鎮(zhèn)供熱系統(tǒng)迅速地發(fā)展開來。暖氣越來越普遍的得到應用,但是在此過程中,也顯現(xiàn)出一些問題,最嚴重的就是熱量浪費,這一現(xiàn)象極其不利于低碳環(huán)保這一全社會共同關注的環(huán)境問題。所以,如何做到熱量節(jié)儉成為社會關注的問題。傳統(tǒng)的按供暖面積進行計費的方式是導致熱量浪費的主要原因,而真正能解決資源浪費這一問題的唯一方式就是熱量表到用戶,按熱量計費,實現(xiàn)一戶一表,這樣既能避免資源浪費,也能使用戶更加方便清楚的了解自家的暖氣使用情況。熱量表按照工作原理可以分為超聲波熱量表,電磁式熱量表和機械式熱量表,而電磁式熱量表及機械式熱量表的缺點太明顯,主要表現(xiàn)為機械磨損嚴重,功耗大,計量精度低等。隨著科學技術的發(fā)展,超聲波熱量表解決了傳統(tǒng)的熱量表存在的問題,真正做到超低功耗,精確度高,抗干擾能力強,使用壽命長。本課題設計的超聲波熱量表,是利用超聲波原理測得流體流速,進而得到流體流量,配合以成對溫度傳感器測得的進口溫度和出口溫度,最終通過積算儀來得到流經(jīng)熱交換系統(tǒng)所釋放的熱量,并配有按鍵功能以供用戶清楚的看到進出口溫度,流量,熱量等數(shù)據(jù)信息。本文利用MSP430F417超低功耗單片機作為超聲波熱量表核心處理器,以皮秒級高精度TDC-GP21專用時間數(shù)字轉換芯片來測量流體流量以及進出口溫度。并通過專用儀表總線M-BUS與外部進行通信。經(jīng)過實驗檢定,本課題設計的超聲波熱量表精度能達到國家要求,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.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU833.1

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本文編號：1762345