CPLD-based multi-path grating signal processing circuit
A grating signal, processing circuit technology, applied in electrical program control, program control in sequence/logic controllers, instruments, etc., can solve problems such as poor stability and poor scalability, and achieve high precision, improved work efficiency, and stable work. Effect
Inactive Publication Date: 2018-04-20
STATE GRID LIAONING ELECTRIC POWER RES INST +3
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Problems solved by technology
At present, circuits composed of discrete components such as dedicated electronic subdivision, direction discrimination and reversible counting chips have poor scalability and poor stability.
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[0025] The present invention is a CPLD-based multi-channel grating signal processing circuit, that is, a programmable logic device-based CPLD processing circuit suitable for multi-channel grating signal. It includes an input interface 1 , a fine phase resolution module 2 , a reversible counting module 3 , an address decoding module 4 , a tri-state gate module 5 and an output module 6 . There are many circuit schemes for realizing the function description of the above-mentioned unit modules, and the circuit scheme adopted in the present invention can be seen in the circuit design described in VHDL. The chip design is completed after the preliminary function description is synthesized, simulated, tested and downloaded through the integrated development environment of the computer.
[0026] The present invention is a complete integrated circuit capable of processing raster signals, such as figure 1 as shown, figure 1 It is a block diagram of the circuit structure when a single ...
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The invention, which belongs to the technical field of electronic measurement, particularly relates to a CPLD-based multi-path grating signal processing circuit. The output, being an input interface outputting two paths of output signals with the different of pai / 2, of a grating sensor is connected with a fine resolution phase module; and the fine resolution phase module is connected with a reversible counting module 3 connected with a three-state gate module. Input lines of an address decoding module are input line address lines A0 and A1, a chip selection line CS, and a data read line RD ofthe grating signal processing circuit; output liens of the address decoding module are G1, G2, and G3 inside the circuit and are used for controlling outputs of three groups of three-state gate circuit; and output module is connected with a CPU. Therefore, the integration degree is improved effectively; and the measurement system works stably and reliably. The CPLD-based multi-path grating signalprocessing circuit has advantages of high accuracy of measurement data, large measurement range, and digital pulse output and can be widely applied to numerical control processing equipment, photoetching equipment, and other industrial automatic control occasions needing high-precision displacement detection.
Description
technical field [0001] The invention belongs to the technical field of electronic measurement, and in particular relates to a CPLD-based multi-channel grating signal processing circuit, specifically a processing circuit for moiré fringe signals output by grating displacement sensors, which is suitable for one or more grating displacement sensors to be connected to The computer system uses a dedicated chip to preprocess the raster signal. Background technique [0002] With the development of mechanical processing and measurement technology, the measurement of length and displacement requires not only the improvement of precision, but also the ability to quickly and objectively output the measurement results of length and displacement in the form of digital signals for data processing and program control. The grating sensor signal processing circuit mainly completes functions such as subdivision, direction identification, counting, and interface. At present, the hardware circ...
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Login to View More IPC IPC(8): G05B19/05
CPCG05B19/054G05B2219/1103
Inventor 金世鑫张武洋李籽良于同伟王同王英明田丰源郑志勤赵书涛陆原尚秋峰李华商文颖戴晓宇
Owner STATE GRID LIAONING ELECTRIC POWER RES INST