A Universal Equivalent Device for External Interface of Telemetry System Based on PXI Bus

Abstract

The invention provides a telemetry system external interface universal equivalent device based on a PXI bus. The telemetry system external interface universal equivalent device comprises a PXI instrument combined module, a signal conditioning combined module and an interface adapter. The PXI instrument combined module includes a zero slot controller, a multimeter board, a multiplexer board, a D / A board, a relay board, an FPGA board, and a timer / counter board. Both the PXI instrument combined module and the signal conditioning combined module are universal platforms. The interface adapter is a model specific part. According to the telemetry system external interface universal equivalent device, a framework of the universal platforms and the special adapter is used, wherein the universal platforms output signals of analog quantity, instructions, digital quantity, a phase sequence and the like, the interface adapter is subjected to differential design according to each model of interface connector and a physical definition, the signals of the platforms are cut and transferred, and the unified test of external interfaces by a telemetry system is realized.

Description

technical field [0001] The invention relates to a general equivalent device for the external interface of a telemetry system based on a PXI bus, which belongs to the field of measurement system testing of launch vehicles. Background technique [0002] The external interface of the current launch vehicle telemetry system generally refers to the electrical interface with other electrical systems such as the control system, utilization system, and servo system. The interface test generally adopts AC, DC, command, digital and other types of signal test benches for independent testing, which is low in efficiency, low in automation, poor in versatility, and high in cost. Some colleges and universities have also begun to study equivalent devices. For example, an equivalent device was given in the 8th issue of 2015, which mainly includes dual-mode communication interface boards, backplanes, analog signal boards, command signal boards, and digital quantities. The signal board and th...

AI Technical Summary

Problems solved by technology

Essentially, this equivalent device integrates all types of signals into one device. If it is extended to other models, because resources and points cannot be expanded, only the industrial computer remains unchanged, and the signal source device still needs to be re-produced, which is not flexible and universal. Easy to expand, but also has problems such as low architecture speed, poor scalability, and high maintenance costs

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