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通常带有时间测量的数字频率计只能测量单次时间间隔。实践中经常需要测量平均时间间隔。例如,检测高速流体中的特种标记通过已知距离的平均时间间隔以确定流体平均流速。只要对数字频率计稍加改装,便可增加测量平均时间间隔的功能。我们对E323型数字频率计按附图虚线内所示改施加装一个双刀双掷开关K,使辅助双稳输入线除能接到门控双稳的输出外,还能接到闸门时间分频器的输出;辅助双稳的输出通过加装的反相器作为闸门时
A digital frequency meter usually with time measurement measures only one time interval. In practice it is often necessary to measure the average time interval. For example, detecting an average time interval of a particular marker in a high-speed fluid through a known distance to determine the average fluid flow rate. As long as the digital frequency meter slightly modified, you can increase the measurement of the average time interval function. We E323-type digital frequency meter according to the figure shown in the dashed line to install a double-pole double-throw switch K, the auxiliary bistable input line in addition to gated bistable output, but also received the gate time points Frequency output; auxiliary bistable output through the installation of the inverter as a gate