摘要
研制了一种可在测量中,现场、原位使用的用于热电阻动态特性校准的计算机插板。由传热学原理,论证了热电阻在外部阶跃温度响应与回路电流阶跃方法(LCSR法)温度响应之间的联系,据此,建立了求得响应时间常数的数据处理方法。在滑油和风洞里用LCSR方法和被测介质温度阶跃进行的对比实验表明:该方法求取的时间常数误差小于5%。用该方法分别求得的热电阻和外壳的时间常数,可以进一步确定影响响应速度的主要因素。
A conventional local calibration device used in computer is developed for calibrating thermo resistors' dynamical characteristics. The relationship between the temperature response of the surrounding temperature step changes and that of the loop current step heating is proved. Then, a data processing method is found in obtaining the response time constant. In lubrication oil and wind tunnel the LCSR and the surrounding temperature step changes are tested and compared. The result shows that the error of the time constant obtained by using this method is less than 5%. And the time constants of thermo resistor and its shell obtained respectively can be further used to determine the main factors affecting the response speed.
出处
《空军工程大学学报（自然科学版）》
CSCD
2004年第4期76-79,共4页
Journal of Air Force Engineering University(Natural Science Edition)
关键词
热电阻
动态特性
校准
thermo resistor
dynamical characteristics
calibration
