DC 110V digital quantity acquisition card based on CPCI bus

Abstract

The invention discloses a DC 110V digital quantity acquisition card based on a compact peripheral component interconnect (CPCI) bus, which comprises a self-checking control circuit, a digital quantity conditioning circuit, an optical coupler isolation and acquisition circuit, a three-state buffer, a PCI bridge and a peripheral circuit. The digital quantity conditioning circuit receives relay contact information through an external input port connector; the output end of the digital quantity conditioning circuit is connected with the optical coupler isolation and acquisition circuit; the output end of the optical coupler isolation and acquisition circuit is connected to the PCI bridge through the three-state buffer; the PCI bridge performs data interaction with a CPCI computer through a PCI bus; and the input end of the self-checking control circuit is connected with a control signal of the PCI bridge, and the output end of the self-checking control circuit is connected to the digital quantity conditioning circuit. As an expansion board of a CPCI computer, the DC 110V digital quantity input information of the subway vehicle-mounted relay can be effectively acquired, so that the state of the vehicle-mounted relay is monitored, the fault position can be quickly positioned, and a fault diagnosis effect is achieved.

Description

technical field [0001] The invention relates to a rail transit information monitoring device, in particular to a DC110V digital quantity acquisition card based on a CPCI bus. Background technique [0002] In the field of rail transit information monitoring, CPCI computers have been used to a certain extent due to their high development, high reliability, and hot-swappable advantages. At present, it mainly monitors and records the communication information between the on-board controller and the train management system, which is used to analyze the monitored data and perform fault diagnosis when false alarm information occurs on the man-machine interface of the train management system. [0003] The relay contact information of subway on-board equipment mainly includes relay opening and closing digital quantity information such as braking, direction, door opening and closing, traction command, etc., which can provide diagnostic data when the relay malfunctions. At present, th...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defect that the CPCI computer in the prior art cannot monitor the relay contact information of the subway vehicle equipment, the present invention provides a DC110V digital acquisition card based on the CPCI bus, which is inserted into the CPCI computer as an expansion board of the CPCI computer for use in Monitor the digital input information of the closed and disconnected states of the relay

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