Automatic Tester For Dial Gaues

Automatic Tester for Dial Gauges is an intelligent instrument unified mechanism light and electronic.The grating displacement sensor that has high accuracy (length gauge )and camcorder is image sensor consummately automatic sampling is adopted .It is controlled and handled data by computer.So it has realized the intelligence and automation of calibrating course .The instrument has features of high precision , efficiency, flexible and convenient in operation, and so on.This paper has introduced the design of the instruction mechanical system, servo control system and image collection and processing system of the Automatic Tester for Dial Gauges in detail. It is illuminated that the step motor with the card of I/O and the step motor actuator is driven by computer.The step motor drives the surveying rod of Automatic Tester for Dial Gauges through the transfer machinery and realizes micro-displacement of the surveying rod. Simultaneously with the micro-displacement started the processe of the grating sensor measuring the displacement and image collection of the system. The grating sensor (length gauge) measures the displacement of the dial gauge with surveying rod. It is delivered to the computer with a block K220 in real time and the dial image by CCD camcorder is shown on the computer screen with the image collection card in real time. Finally,it is compared the displacement of the dial gauges with the grating sensor measuring. The indication error that examined is obtained.In this paper, systematic precision and performance by experiment is verified and the requirement of the systematic technical index is reached.