The Signal Research Of Encoder Based On Time Grating

CNC machine tool system and the machine tool measuring system is a key part of modern machine tools, especially machine tool measuring system, which is a prerequisite for ensuring high-precision machine tools. The sensor measurement system is a critical component, but the current sensor market is basically dominated by foreign products, few independent intellectual property rights of sensors and the numerical control systems and machine tools are not largely compatible with internal sensors. If we can smooth machine tool numerical control system and docking domestic products, it has very important significance for the gross national product and national defense construction.In this paper, sensor status and development directions are reviewed, focusing on the current market, a very popular abroad, the basic working principle of encoder and signal exchange. At the same time its advantages and disadvantages are analyzed.Then it describes a China with independent intellectual property rights of the sensor - time grating sensors, and the basic principles of its related products were reviewed. Finally highlights the basic working principle and signal exchange of time grating sensors which has a shape and the market. At the same time its advantages and disadvantages are analyzed.The topic "the signal research of encoder based on time grating" based on time grating(with independent intellectual property rights and access to national patent products gold) does a in-depth research of current mainstream sensors - the grating sensor signal system compatibility problems.On their own knowledge products to promote and develop national industry have a very important significance. This paper describes an absolute-type grating and the absolute time grating sensor signal exchange principle, analyzes the similarities and differences between the two. In the computer-aided design, based on the grasping economic principles to be applied,Put forward a set of microcontroller core, how to convert time grating signal to raster signal system. This system consists of two main functional modules as the core. Module 1 - the transducer connected to the receiver of the absolute time grating sensor signal and translate them into an absolute encoder signal. The main by a microcontroller as the core, with its serial port to receive the absolute time grating signal and use the software to decode the way, and then for the signal conversion process in the two main problems: 1, how to achieve zero to the variable from a fixed zero. 2, how to achieve the output signal from a single ring to multiple rings. Design of the relevant algorithms. Software solution to the problem of the hardware, making this design of hardware to simplify, this is a bright spot in this design. Another highlight of this design is the converted signal output with the microcontroller interrupt pin to receive the synchronous clock signal. So let us choice in the microcontroller can select a more inexpensive model, rather than choose a MCU with synchronous clock signal transmission pins insisted the high price, thereby reducing the cost of the product easier to enter the market. Module1 is the core of the design. Verification module (module 2) receives the output signal of module 1, module 2 simulates the absolute encoder signal receiving system and verifys the signal after conversion of module 1, see conversion was successful or not. Finally done with the time grating connected to the real machine sensor detection tests and collected data, the error curve obtained, then based on the analysis of the error curve ,the system is improved, finally got the right design.