Adopt laser trigonometry displacement measure theory in the detection of glass thickness on line and the method in the hot side of annealing kiln.

By showing some examples of design of error correcting device for conveyer belt, this article explains the principle of this device and the application in conveyer belt of bottle annealing kiln.

The mechanical transmission system designed by the author has proved that the operation of the annealing kiln is both economical and reliable.