测风雷达遥测频率的快速测量

Fast Measuring of Telemetering Frequencies for a Wind-Gauging Radar

测风雷达接收到的电子探空仪遥测信号,是在强噪声中出现的3路时分且重复频率F受传感器控制的间歇脉冲串。为了快速测出足够准确的F值,本文用双路计数器交替无间隙单周期计数,送Z80μC经统计判决剔除坏值后再平滑随机干扰,导出了给定测量精度下所需采样数与F的关系,实现了实时采集与处理。

The signals, telemetered from an electronic sounder and received by a windgauging radar, are intermittent 3-channel time-shared pulse trains, arising in strong noises and with their repetition frequency F being controlled by sensors. To determine F with hlgh-speed and sufficient accuracy, in thispaper a method is used to survey each pulse recurrence by means of two counters in alternating and gapless operation, then feed the results into a μC, where bad values are rejected by statistical discrimination, and random interferences are smoothened. The relation between the sample number in given accuracy and F is derived, and the data acquisition and processing are fulfilled in real-time.