Grating signal acquisition control card

Abstract

The invention discloses a novel grating signal acquisition control card. Four interfaces used for receiving grating sensor signals are connected with an FPGA through four differential signal receivers. Two paths of frequency measurement interfaces and motor control interface are connected to the FPGA. An internet access for Ethernet communication is connected with an ARM through an Ethernet transceiver. A USB interface is connected to a level conversion chip through a USB-to-serial port chip and then connected with the ARM. Eight paths of IO interfaces are connected to the ARM through an IO interface conversion circuit. The FPGA is used for acquiring four paths of grating signals, so that synchronous acquisition of the four paths of signals can be guaranteed, and compared with most acquisition cards, the grating signal acquisition control card not only has a data acquisition function, but further is integrated with a motor control interface, a motor can be directly controlled accordingto the grating signals, the real-time performance of a system is guaranteed, and the working efficiency of the acquisition card is improved.

Description

technical field [0001] This patent relates to the field of electronic circuits, specifically, a data acquisition card. Background technique [0002] In recent years, as the precision requirements of instruments and equipment are getting higher and higher, gratings are widely used in various measuring instruments because of their high precision and strong anti-interference ability. [0003] Grating sensors are usually used as measuring elements to measure angles, displacements, accelerations, etc. However, with the increasing complexity of instruments and equipment, there may be multiple grating sensors in one instrument. In high-speed and high-precision systems, such as transmission systems, multi-axis machine tools, etc., the frequency of such grating signals is often very high, and a microsecond-level delay may cause a large error. In order to improve the system accuracy, the position of each axis needs to be collected in real time. Secondly, after collecting these loca...

AI Technical Summary

Problems solved by technology

However, with the increasing complexity of instruments and equipment, there may be multiple grating sensors in one instrument

In high-speed and high-precision systems, such as transmission systems, multi-axis machine tools, etc., the frequency of such grating signals is often very high, and a delay of microseconds may cause a large error

Images