我们采用了上海自动化仪表三厂生产的WDL-31型光电温度计来测量蜗轮轴等的加工温度:加热温度、始锻温度和终锻温度。该型光电温度计反应速度快、测量范围宽、读数稳定可靠,适用于快速地测量静止的、移动的或旋转的物体表面温度,并且能自动显示、记录、报警等,这些都满足了我们的要求。但是,光电温度计是一种非接触式测温仪表,平常所得到的只是被测物体的亮度温度,要得到真实温度值,还得要知道被测物体的实际辐射系数ε。辐射系数随被测物体的材质、表面状态和环境条件的不同而有差异,要确切知道被测物体的实际辐射系数ε是很困难的,不过,WDL-31型光电温度计设有调节辐射系数ε的旋钮,以适用于 We use the WDL-31 photoelectric thermometer produced by Shanghai Automation Instrumentation Factory to measure the processing temperature of worm shaft and so on: heating temperature, initial forging temperature and final forging temperature. This type of photoelectric thermometer has the advantages of fast response, wide measurement range, stable and reliable reading, and is suitable for quickly measuring the surface temperature of stationary, moving or rotating objects, and can automatically display, record, alarm and so on, which meet our requirements . However, the photoelectric thermometer is a non-contact temperature measuring instrument, usually obtained only the brightness temperature of the measured object, to get the true temperature value, you have to know the measured object’s actual emission coefficient ε. Emissivity varies with the material, surface condition and environmental conditions of the object to be measured, it is difficult to know exactly the actual radiation coefficient ε of the object to be measured. However, the WDL-31 photoelectric thermometer has a function of adjusting the radiation coefficient ε Knob to fit