Abstract:

The gate opening measurement is one of the basic indicators of hydraulic gate monitoring.The traditional gate opening measurement method has low measurement accuracy and large measurement difficulty.To solve the problem of measuring gate opening,this paper researches the measurement methods of image analysis based on bar code.Aiming at the limitation of three cycle spacing bar code encoding,a new coding and decoding method is proposed.Finally we establish a complete set of gate opening measuring and monitoring system.The results show that this system can real-time automatic measure gate opening,whose accuracy is high and stability is strong.And the improved coding and decoding method of the bar code image analysis method can obtain better gate opening measurement results,provide effective solutions for the actual engineering measuring gate opening.

Key words: gate opening, bar code, image analysis, encoding and decoding, recognition and location