本文選題：超聲波測溫　切入點：回波前沿　出處：《中國測試》2017年04期 　論文類型：期刊論文

【摘要】：針對超聲波測量技術存在難以準確捕捉回波前沿起點的問題,設計基于寬頻帶、高接收靈敏度的靜電換能器的超聲測溫系統(tǒng),配合脈沖高壓偏置驅(qū)動電路,得到前沿明顯且易捕捉的回波信號;設計石英玻璃超聲波傳遞通道,采用閾值檢測法和鉗位電路設計防誤觸發(fā)回波處理電路,提高系統(tǒng)的穩(wěn)定性;選用高主頻單片機STM32F407準確測量超聲波傳遞時間,再以分段線性插值法對系統(tǒng)測溫值進行標定。在恒溫箱10~58℃的溫度范圍內(nèi)將系統(tǒng)測溫數(shù)據(jù)與高精度測溫計TSIC506的測溫值對比,實驗結(jié)果表明系統(tǒng)可實現(xiàn)精準測溫。
[Abstract]:Aiming at the problem that ultrasonic measurement technology is difficult to accurately capture the starting point of echo front, an ultrasonic temperature measuring system based on wide band electrostatic transducer with high receiving sensitivity is designed, which is combined with pulse high voltage bias drive circuit. The ultrasonic transmission channel of quartz glass is designed, the threshold detection method and the clamp circuit are used to design the anti-misfiring echo processing circuit to improve the stability of the system. The ultrasonic transfer time is accurately measured by STM32F407, and the temperature measurement value of the system is calibrated by piecewise linear interpolation method. The temperature measurement data of the system are compared with those of the high precision thermometer TSIC506 in the temperature range of 1058 鈩，

本文編號：1581256