用于汽车仪表校验的新型精密标准电阻设计

Design of a Newstyle Precision Standard Resistance Used in Checking Motormeter

精密标准电阻是为汽车仪表校验时提供可编程标准模拟电阻设计的,电路采用微型计算机控制模拟开关的通断和并联方式输出的可编程的电阻网络,具有数字化、可编程、电阻可任意组合等特点,是微机化程控电阻的一种实用方案。并介绍了模拟传感器电阻的实现方式,以及精度问题。

Precision standard resistance generator is designed for producing a programmable standard simulant resistance which is used to checking motormeter. The circuit adopts microcomputer to control the analog switch and precision programmable network of resistance, whose output style is using parallel connection. It has the features of digital, programmable and its resistance can be combined randomly. It’s a practical solution of microcomputer-based controlling programmable resistance, which can be widely adopted in the process of checking motormeter. This article mainly deals with implementation methods of analog sensor resistance and its precision problem.