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数字显示的测温仪器通常先把传感器,非线性预先进行校直,然后进行模数变换并显示.一般校直方法对多数传感器实现高水平线性化是不容易的.所介绍的数字温度计,包含由几片集成电路组成的专用计算.它能很容易地把传感器的温度曲线分成几十段,由于每段复盖的温度范围很小,所以误差小.计算机可以使用几种不同的传感器进行温度测量.对同一种类的传感器,即使所用的几支传感器的性能参数有较大的差异也关系不大,不需要调整硬件,只要在专用计算机中的电可编程序只读存储器内存入相应的温度表格即可.把要使用的几种传感器的温度表格存入只读存储器中以后,使用者即使完全不了解计算机知识,也可以方便地使用该仪器进行温度测量.用此法研制了两种测温控温仪器,一种可以使用8支参数不同的铂电阻作为感温元件,一种可以使用三种不同种类的热电偶和铂电阻共4种传感器作为感温元件。对计算机硬件和软件作了简介,给出了仪器的各项性能指标.
Digital display of the thermometer usually first sensors, non-linear calibration in advance, and then perform analog-digital conversion and display.General alignment method for most sensors to achieve a high level of linearization is not easy to introduce the digital thermometer contains It is a dedicated calculation made up of a few integrated circuits that can easily divide the sensor’s temperature profile into dozens of segments and small errors due to the small temperature range covered by each segment The computer can use several different sensors for temperature Measurement of the same type of sensor, even if the performance of several sensors used there is a big difference between the parameters is not significant, do not need to adjust the hardware, as long as the dedicated computer EEPROM memory into the appropriate temperature The table can be used.With the use of several types of sensor temperature table is stored in read-only memory, the user even without complete knowledge of the computer, but also can easily use the instrument for temperature measurement.This method developed two kinds of measurement Thermostat temperature instruments, one can use eight different parameters of the platinum resistance as a temperature sensing element, one can use three different types of thermoelectric And a total of 4 sensor platinum resistance temperature sensing element. A brief introduction to computer hardware and software is given, and the performance indexes of the instrument are given.