PT100铂电阻温度传感器特性的测量数据

PT100是铂热电阻，它的阻值会随着温度的变化而改变，所以通过测量PT100铂电阻的阻值与温度的关系，来求得PT100的温度系数，是为了通过测量其电阻值的变化来间接精准的测量温度和监控温度的变化。PT100温度传感器在生活中它为我们提供了很多方便，在PT100温度传感器产品中，温度PT100温度传感器是主要的需求产品，它被应用在医疗、‌电机、‌工业、‌温度计算、‌卫星、‌气象、‌阻值计算等高精温度设备方面有着及其重要的作用。在工业控制中，PT100通常被用于监测和控制设备的温度，可以实现远程监控和数据采集等功能，提高生产效率和产品质量。采集：从室温起开始测量，然后每隔5.0℃设定一次温控器，待温度稳定后，测量PT100电阻上对应电压Vo以及取样电阻R上电压VR（由于采用恒流源I，VR仅需要测量一次），根据欧姆定律，I=VR/R，所以PT100铂电阻的阻值为：Rt=V0/I=RV0/VR=100*（V0/VR）。
分析：
1、为了测量PT100铂电阻与温度的关系，我们将测量的数据绘制Rt-t曲线图，设Rt为▲y轴，设t为▲x轴，把测量数据用最小二乘法进行拟合处理，求得直线斜率K=▲y/▲x=(y2-y1)/(x2-x1)，再根据Rt-t数据直线拟合求得电阻值R0=y-Kx。
2、PT100铂电阻的阻值随温度而变化，本测试温度为室温～100℃，由于二次项系数较小，计算公式为：A=[(Rt/R0)-1]/t=K/R0 ，从而求得A的系数。
3、当温度为100℃时标准电阻值为R100=138.51Ω，根据公式TCR=(R100-R0)/(R0×100)，求得温度系数TCR，然后算出温度系数TCR平均值，来分析和了解PT100铂电阻温度传感器特性的准确性和功能性。

PT100 is a platinum resistance temperature detector (RTD). Its resistance changes with temperature. By measuring the relationship between the resistance and temperature of PT100, its temperature coefficient can be obtained, so as to indirectly and accurately measure and monitor temperature changes by detecting variations in its resistance.

PT100 temperature sensors bring great convenience to daily life. Among all PT100 temperature sensor products, the standard PT100 temperature sensor is the most in-demand one, which plays an extremely important role in high-precision temperature-related equipment and applications including medical treatment, motors, industrial control, temperature calculation, satellites, meteorology, and resistance calculation.

In industrial control, PT100 is usually used to monitor and control equipment temperature, realizing functions such as remote monitoring and data collection, thereby improving production efficiency and product quality.

Data Collection:
Start measurement from room temperature, then set the temperature controller every 5.0℃. Wait until the temperature stabilizes, then measure the voltage Vo across the PT100 resistor and the voltage VR across the sampling resistor R. Since a constant current source I is used, VR only needs to be measured once. According to Ohm's Law, I=VR/R, so the resistance of the PT100 platinum resistor is: $R_t = frac{V_0}{I} = frac{R V_0}{V_R} = 100 imes frac{V_0}{V_R}$.

Data Analysis:
1. To measure the relationship between PT100 platinum resistor and temperature, plot the $R_t-t$ curve using the measured data. Set $R_t$ as the y-axis and $t$ as the x-axis, then perform least squares fitting on the measured data to obtain the slope of the fitted straight line $K = frac{Delta y}{Delta x} = frac{y_2 - y_1}{x_2 - x_1}$. Calculate the resistance value $R_0 = ar{y} - Kar{x}$ based on the linear fitting results of the $R_t-t$ data.
2. The resistance of PT100 platinum resistor varies with temperature. The test temperature range in this dataset is room temperature to 100℃. Since the quadratic coefficient is small, the calculation formula is: $A = frac{(R_t/R_0 - 1)}{t} = frac{K}{R_0}$, thus the coefficient A can be obtained.
3. The standard resistance value of PT100 at 100℃ is $R_{100}=138.51Omega$. According to the formula $TCR = frac{R_{100} - R_0}{R_0 imes 100}$, calculate the temperature coefficient TCR, then compute the average value of TCR to analyze and verify the accuracy and functionality of the PT100 platinum resistance temperature sensor characteristics.