On the basis of the Characteristics showed in plastic injection moulding of polycarbonate and the structural feature of the car instrument cluster pointer , the reasonable arrangement of the process parameters has been selected by means of the design and test methods to solve thoroughly the quality problems such as the bubbles ,patterns and cracks on the pointers and to raise the product yield.

The author introduces the structure,working principle and parameters of stepper motor,elaborates control design of the meter hand with an example of speedometer.

To implement the automatic detection of the analog measuring instruments,an automatic system of detecting analog measuring instruments based on the technology of computer digital image processing is designed.

In this dissertation, an auto-detecting method of detecting analog measuring instruments, based on digital image processing technique, high-precision grating measuring technique and step-electromotor controlling technique, is put forwarded.

The dial instruments are the primary tools for the measurement of electricity inelectric power industry.

LabVIEW-Based Real-Time Reading System for Gauge with Pointer;

In this dissertation, researchs are done for auto-detecting of the gauge with pointer which plays an important role in industrial detecting at present.

At present , the gauge with pointer is widely used in the producing process.

Automatic detection equipment for index-instrument;

In automatic reading system of index-instrument,image of dial plate needed be read must match template in order to decide type and range of instrument needed be read.