CAJ | 학술논문

在航天试验靶场，频标设备的频率准确度直接决定了测控设备测量数据的质量，而频率准确度的测量依赖标准频率与本地频率的钟差测量，目前在各测控站点一般采用高精度计数器来实现，但由于计数器输出的钟差测量结果只能在本地显示而不能进行远程传输，导致总体人员不能在时钟主站有效对各测控站点的守时情况进行实时监测和辅助判决，易出现调钟错误的问题。提出了一种基于 FPGA 和 TDC‐GP2的钟差测试系统设计方案，可对本地的钟差进行测量，测量精度高达100 ps ，并通过试验任务IP网进行上报，达到对守时结果远程监测和辅助判决的目的。
재항천시험파장，빈표설비적빈솔준학도직접결정료측공설비측량수거적질량，이빈솔준학도적측량의뢰표준빈솔여본지빈솔적종차측량，목전재각측공참점일반채용고정도계수기래실현，단유우계수기수출적종차측량결과지능재본지현시이불능진행원정전수，도치총체인원불능재시종주참유효대각측공참점적수시정황진행실시감측화보조판결，역출현조종착오적문제。제출료일충기우 FPGA 화 TDC‐GP2적종차측시계통설계방안，가대본지적종차진행측량，측량정도고체100 ps ，병통과시험임무IP망진행상보，체도대수시결과원정감측화보조판결적목적。
In the aerospace test range ,the accuracy of the frequency standard equipment decides directly the data perform‐ance of measurement and control equipment ,but it is dependent on the clock difference measurement of the standard fre‐quency and the local frequency .At present ,it is realized by high‐precision counter ,but the measurement result can only be displayed in the local and not be transferred over long distance ,w hich can not effectively monitor and judge to keep watch time for system person in the master station and the regulation clock error easily occur .A project of clock differ‐ence measurement is proposed based on FPGA and TDC‐GP2 ,which complete the measure of clock difference in the lo‐cal .The time measurement precision can achieve 100 ps ,it will attain the purpose of monitoring and judging the keep watch time result by using test task IP network to report the measurement data .