Pulse signal test device of inertial platform for launch vehicle

Abstract

The invention discloses a pulse signal test device of an inertial platform for a launch vehicle. The pulse signal test device comprises a pulse isolation conditioning board, FPGA (field programmable gata array), a PCI (programmable communication interface) bus controller and an upper computer, wherein the pulse isolation conditioning board is provided with an expansion slot; a multi-channel pulse insulation conditioning circuit is arranged on the pulse isolation conditioning board; each counter is arranged in the FPGA and is used for independently counting the digital logic level of the corresponding input channels and locking the self enumeration data to a latch corresponding to the input channel through the pre-set time interval; a handshake mode is adopted to communicate the PCI bus controller and the FPGA; the data bus of the FPGA is used for reading the current stored data of each latch to the self FIFO (first-in-first-out) in parallel; and the upper computer is used for obtaining data from the FIFO of the PCI bus controller according to the method of a cPCI bus protocol. The pulse signal test device of the inertial platform for the launch vehicle has good expansibility and instantaneity.

Description

technical field [0001] The invention relates to a pulse signal testing technology, in particular to a pulse signal testing device for an inertial platform of a carrier rocket. Background technique [0002] The rocket attitude signal output by the inertial platform of the launch vehicle is usually a pulse signal, which needs to be counted and collected in order to analyze and track the rocket attitude. At present, for the acquisition of pulse signals of rocket inertial platforms, general-purpose counting boards are often used, such as the cPCI-8554 multi-function counting / timer card of ADLINK Technology Co., Ltd., and the PXI-6602, PXI-6608, PXI- 6624 card, CPI-2390 optical isolation counter card of Altai Technology Development Co., Ltd., etc. The basic principles of the above-mentioned counter cards are the same: set the time interval for the computer to read data through software settings, and the calculation of the time interval is completed by the timer on the counter bo...

AI Technical Summary

Problems solved by technology

In addition, channel expansion in this way is equivalent to adding more channels to a counter card, so when the computer reads the count values ​​of each channel one by one, it takes more time, so the system error will further increase

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