General simulation and digital signal input and output board card

Abstract

The invention relates to a general simulation and digital signal input and output board card. The input and output board card comprises a single chip microcomputer, signal input interfaces and signal output interfaces. The single chip microcomputer internally comprises a relay control module, a digital signal input and output module, an analog signal input and output module and a protocol conversion module and supports the MODBUS protocol, the VXI11 protocol and the TCP / IP protocol. The signal input interfaces comprise the VPC interface and the MAC interface. The signal output interfaces comprise the Ethernet interface, the CAN interface, the LIN interface and a series port. The board card can be directly inserted into a test instrument, collects detection signals in a centralized mode and transmits the detection signals to a remote control end, in this way, wires, cables and connectors, used for connecting the test instrument and production equipment and the control end, on a production line are reduced substantially, so that the problems of complex wiring, difficult maintenance and mutual interference of lines in the prior art are avoided, and the noise of detection results can be reduced.

Description

technical field [0001] The invention relates to a universal analog and digital signal input and output board. Background technique [0002] In the prior art, the data acquisition of many testers and test systems used in the production line, as well as the data transmission between the test end and the remote control end (such as PC or PXI, etc.), are basically based on large-scale interconnection Custom wire and cable to complete. This has the following defects: first, the wiring is very complicated, and it is very difficult to repair once a problem occurs; second, the mutual influence between the lines is easy to interfere with the test system; third, the cable itself has a certain resistance value, and the terminal of the cable is the data acquisition system The connector, the additional resistance of the cable itself and the connector are all included in the test system, which will inevitably bring certain negative effects to the test system, such as affecting the accura...

AI Technical Summary

Problems solved by technology

This has the following defects: first, the wiring is very complicated, and it is very difficult to repair once a problem occurs; second, the mutual influence between the lines is easy to interfere with the test system; third, the cable itself has a certain resistance value, and the terminal of the cable is the data acquisition system The connector, the additional resistance of the cable itself and the connector are all included in the test system, which will inevitably bring certain negative effects to the test system, such as affecting the accuracy of the test results, etc.

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