High-accuracy data receiving time service instrument

Abstract

The invention discloses a high-precision data recording time service instrument. A GPS time-service plate receives the second pulse information of precision and absolute time information through an antenna; the information is then transmitted to a recording control plate and corrects an internal clock in the control plate; strict synchronisation between the control plate and the absolute time is kept; the recording control plate is respectively connected with the equipments to be recorded and a user data collecting computer through communication cables; the user data is received and the commands emitted by a computer is collected in accordance with a communication protocol; the state of the GPS receiver and GPS time and position information are fed back to the user data collecting computer; the communication rate and data frame format of the equipment to be recorded are arranged; the communication with the equipment to be recorded is established; the time-service instrument is convenient to be carried, can work in all areas with GPS satellite signals, is used for providing asynchronous series testing interfaces for the time-service precision requirement of 1 multiplied by 10<-4> seconds; furthermore, the communication rate is 38400bps. The invention is used for testing the true-value equipments which has fixed testing frame length and 38400bps of signalling rate and recording the output data of the equipment to be tested.

Description

technical field [0001] The invention relates to the technical field of data acquisition and time service, and relates to a miniaturized high-precision data acquisition and time service instrument based on GPS time service technology. Background technique [0002] At present, when conducting dynamic accuracy tests of various coarse and high-precision civil radars, air traffic control radars, precision tracking radars, and photoelectric tracking equipment, for the convenience of description, the above-mentioned equipment, hereinafter referred to as the enrolled equipment, must obtain air or ground target Accurate dynamic position data also needs to obtain the measurement data output by the recorded equipment, and the acquisition of these two types of data, according to the different accuracy requirements of the recorded equipment, needs to maintain time synchronization at different precisions. Only the synchronized data can be obtained. According to certain requirements, data ...

AI Technical Summary

Problems solved by technology

The traditional synchronization method usually uses a synchronous control device to control the real-value data and the synchronous recording of the recorded device data through wired connection and synchronous pulse signal triggering. The disadvantages are: large amount of equipment and complicated operation; high sampling frequency, When the test data flow is large and the test points are located in a wide area, the synchronization signal cannot be transmitted or the delay of the synchronization signal is large, which limits the measurement of the accuracy index

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