论文部分内容阅读
目前,省内大多数粮站仓库使用热敏电阻作传感元件,如MF——1、CGQ——Ⅱ等,进行测温。这些电阻不但体积较大,价格偏高,而且线性不好,误差较大。与之相比,用普通硅晶体管作传感元件,却有良好线性(-100～+200℃),从而保证了较高的精度。同时还具有体积微小,价格便宜,选购方便等优点。可以预料,在今后的粮油测温中,将会普遍使用硅晶体管作感温元件。晶体管是怎样作为传感元件来测温的呢?大家知道晶体二极管的PN结,在一定偏
At present, most grain storage depots in the province use thermistors as sensing elements, such as MF - 1 and CGQ - Ⅱ, for temperature measurement. Not only these resistors are bulky, the price is high, and the linearity is not good, the error is bigger. In contrast, ordinary silicon transistors for sensing components, but there is a good linearity (-100 ~ +200 ℃), thus ensuring a higher accuracy. At the same time also has a small size, cheap, easy to buy and so on. It can be expected that in the future of grain and oil temperature measurement, it will be common to use silicon transistors for temperature sensing components. How the transistor as a sensing element to measure the temperature? We all know that the PN junction diode, in a certain partial