本文關(guān)鍵詞：基于半導(dǎo)體制冷技術(shù)的溫度控制系統(tǒng)研究　出處：《中國民航大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 半導(dǎo)體制冷 溫度控制 慣導(dǎo)系統(tǒng) LabVIEW 最小二乘法

【摘要】：慣性導(dǎo)航系統(tǒng)能夠自主定位并提供載體姿態(tài)和加速度信息的特性,使其在航空航天領(lǐng)域有著不可替代的作用。由于陀螺儀和加速度計作為慣性導(dǎo)航系統(tǒng)的核心器件對溫度的敏感性,溫度漂移已成為主要的誤差源。為降低溫度對慣導(dǎo)測量精度的影響,創(chuàng)造一個小空間的恒溫環(huán)境對陀螺和加表進(jìn)行測試和溫度補償將是一個有益的嘗試。本文所設(shè)計的基于半導(dǎo)體制冷技術(shù)的溫度控制系統(tǒng),包括TEC溫度控制硬件系統(tǒng)和LabVIEW溫度監(jiān)控人機(jī)交互系統(tǒng)。下位機(jī)實時采集三路DS18B20溫度傳感器的數(shù)據(jù)并送入LCD顯示,根據(jù)實際溫度與目標(biāo)溫度的差值通過分段PID溫度控制算法輸出對應(yīng)數(shù)字控制量,經(jīng)兩路DAC模塊轉(zhuǎn)換,輸出可控電流驅(qū)動兩組半導(dǎo)體制冷模塊協(xié)同控制溫箱使其達(dá)到目標(biāo)溫度。上位機(jī)通過RS232串口與下位機(jī)通訊,實現(xiàn)溫度的同步采集、顯示、繪圖、報警和數(shù)據(jù)保存等功能。系統(tǒng)溫控性能與慣導(dǎo)溫度補償測試實驗時,首先采用最小二乘法對溫度傳感器進(jìn)行標(biāo)定,DS18B20最大平均誤差由0.465℃降至0.075℃,測量精度明顯提高;然后經(jīng)過可靠性和穩(wěn)定性實驗,系統(tǒng)連續(xù)運行40小時無任何故障;接著對系統(tǒng)進(jìn)行了測溫精度和控溫效果實驗,實驗結(jié)果表明,系統(tǒng)測量誤差在0.1℃以內(nèi),溫控精度基本達(dá)到設(shè)計的±0.5℃的目標(biāo);最后進(jìn)行了實際的慣導(dǎo)溫度補償測試實驗,系統(tǒng)用于某型MEMS慣導(dǎo)模塊實際溫度補償測試,整體效果較理想。
[Abstract]:The inertial navigation system can independently locate and provide the characteristics of carrier attitude and acceleration information. Because gyroscopes and accelerometers are the core devices of inertial navigation system, they are sensitive to temperature. Temperature drift has become the main error source. It will be a beneficial attempt to create a small space constant temperature environment to test and compensate the gyroscope and meter. A temperature control system based on semiconductor refrigeration technology is designed in this paper. It includes TEC temperature control hardware system and LabVIEW temperature monitoring man-machine interactive system. The lower computer collects the data of three DS18B20 temperature sensors in real time and sends them to LCD display. According to the difference between the actual temperature and the target temperature, the corresponding digital control quantity is output through the subsection PID temperature control algorithm, which is converted by two DAC modules. The output controllable current drives the two groups of semiconductor refrigeration modules to control the temperature box to achieve the target temperature. The upper computer communicates with the lower computer through RS232 serial port to realize the synchronous acquisition display and drawing of temperature. System temperature control performance and inertial navigation temperature compensation test experiment, the least square method is first used to calibrate the temperature sensor. The maximum average error of DS18B20 is reduced from 0.465 鈩，

本文編號：1373622