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  本文選題：測距系統(tǒng) + 放大電路�。� 參考：《河北工業(yè)大學(xué)》2012年碩士論文

【摘要】：液位測量技術(shù)在工業(yè)生產(chǎn)中占有重要的地位，隨著工業(yè)水平的不斷發(fā)展，測量技術(shù)逐漸由手動變?yōu)樽詣樱�由傳統(tǒng)的不科學(xué)變?yōu)楦�具有科學(xué)性可依的測量方法。本文主要介紹測距系統(tǒng)的單片機控制模塊，4-20mA電流轉(zhuǎn)換模塊，電源模塊，太陽能供電模塊，液晶顯示模塊，升壓電路模塊，三級放大電路模塊，溫度補償系統(tǒng)模塊，KALMAN算法數(shù)據(jù)處理等幾大關(guān)鍵核心模塊。 首先完成單片機控制模塊的設(shè)計，，控制模塊主要負責(zé)計算測距系統(tǒng)到被測液面的距離。24V電源模塊是將輸入的24V電壓轉(zhuǎn)換成電路需要的電壓值。太陽能供電模塊主要目的是解決偏遠地區(qū)無法正常供電時的電池供電情況。液晶顯示模塊主要方便現(xiàn)場對液位測距系統(tǒng)參數(shù)的設(shè)置，及現(xiàn)場采集到的數(shù)值與中控室數(shù)據(jù)的對照。其次完成升壓模塊的電路設(shè)計，將系統(tǒng)產(chǎn)生的電壓進行大幅度的提升激勵探頭產(chǎn)生用于測量的超聲波，超聲波經(jīng)過被測液面后，返回的微弱波經(jīng)過三級放大電路放大還原后送入單片機做進一步計算。在計算過程中使用溫度補償系統(tǒng)采集到的數(shù)值對數(shù)據(jù)進行校正。最終使用Kalman算法對測量的數(shù)值進行進一步的精確分析，得出一個精度相對較高的液位高度值，通過4-20mA電流轉(zhuǎn)換模塊將高度數(shù)值轉(zhuǎn)化成電流值傳送至中控室進行液位監(jiān)測。基于超聲波的測距系統(tǒng)的超聲波液位計具有成本低，技術(shù)要求不高，工作穩(wěn)定性強，易于操作等幾個方面的特點，被廣泛應(yīng)用于測量的各個領(lǐng)域。但其普遍存在受環(huán)境溫度影響大、精度不高幾個方面的缺點。因此研究帶自身校準(zhǔn)功能的超聲波液位計具有重要意義。 課題對超聲波液位計進行理論分析，硬件結(jié)構(gòu)系統(tǒng)設(shè)計，Kalman算法數(shù)據(jù)分析，整機調(diào)試，達到預(yù)期目標(biāo)。實現(xiàn)了對液位環(huán)境的低誤差測量，具有一定的使用價值。
[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.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP274;TP368.12

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本文編號：2004597