| In this paper, measurement principle and development state of grinder detect and control devices are briefly introduced. The advantages and disadvantages of several classical Moire fringe division methods are analyzed and compared with each other.Based on Phase-Locked Multi-Frequency division method ,and then a method of using LSI-ISP devices to design to realize integrating designation .This paper briefly introduced ISP devices and hardware description language VHDL ,and designs a kind of high integrated grating digital readout based on division theory and ISP design theory.The program scheme combines the hardware design with software which have the features of modularization and all purposes. The paper gives the basic constitute and function of each part of the hardware circuit, and the follow chart of the main program and subprogram.The features of the new type of integration scheme can be described as follow: high division and easy debug are achieved in the scheme; accumulative total is used, and the discord of integer part and decimal part are avoided in the scheme; it can divide as well as detect direction; it can integrate the counter into ISP device and then evaluate the maxim frequency of the counter; it also integrate square wave and some logic devices into ISP device, and then improve integration, reliability, stability and have the character of software designation instead of hardware designation and in system programming, and it becomes very easy to modify the circuit and to extend the function.Base on phase-Locked Multi-Frequency division and LSI-ISP devices, the internal circle grinder detect and control device realized digital controlling, improved precision and working efficiency of observing and controlling greatly, improved the signal track capacity. Simulate and debug course circuital experiment of part have verified the design feasibility. The grinder measurement and control device has established a basis for the high technology product of device's localization. |
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