Small CPCI board card for multi-protocol data acquisition

Abstract

The invention discloses a small CPCI board card for multi-protocol data acquisition. The small CPCI board card comprises a data processing module, a bus transfer module, a CPCI interface module, a function interface module, a bidirectional driving module and a differential module. Through the CPCI board card, EnDat protocol and SMBus protocol communication functions can be realized, the CPCI boardcard is respectively connected to a photoelectric encoder sensor of Heidenhain company and an infrared temperature sensing chip of Melexis company according to the EnDat protocol and the SMBus protocol, and through signal acquisition and processing, a purpose of real-time acquisition of the sensor information is achieved. On the other hand, a miniaturized design scheme is adopted to reduce the space and save the cost.

Description

technical field [0001] The invention relates to a small-sized CPCI board for multi-protocol data acquisition, belonging to the technical field of aircraft control system simulation. Background technique [0002] The EnDat protocol is a digital, full-duplex synchronous serial data transmission protocol specially designed by HEIDENHAIN for encoders. It has the advantages of fast transmission speed, powerful functions, simple connection, and strong anti-interference ability. A common interface for ruler data transmission. The encoder uses natural binary, cyclic binary (Gray code) or PRC code to photoelectrically convert the physical engraved lines on the code disc, and converts the rotation angle of the connecting shaft into a corresponding electrical pulse sequence and outputs it as a digital quantity. Encoders have the advantages of small size, high precision, digital interface and absolute positioning, and are widely used in many fields such as turntables, robots, CNC machi...

AI Technical Summary

Problems solved by technology

[0005] The original servo mechanism swing angle, position and other data acquisition systems used analog output sensors. The acquisition process has a lot of interference, which directly affects the measured value of the servo swing angle and position, which makes the measured value of the frequency characteristic of the servo mechanism poor and affects the performance evaluation of the control system.

At present, there is a lack of real-time temperature collection methods, and it is impossible to collect and measure the ambient temperature and equipment temperature in real time, and the degree of automation of simulation experiments is not high.

Images