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本比测器是专为在缆道上进行流速仪比测之用。它是利用缆道索与水、地构成回路而同时可以发射和接收两种讯号。这样,有缆道的测站可不用在船上进行比测。另外,用缆道悬吊流速仪进行比测可以避免测船摆动及船身束流等影响,减少比测不应有的误差,提高精度。我们试制本仪器之后曾在水深1～3米及水深达10米的中小河进行比测,效果良好,讯号清晰。现将有关装置简述如下。本仪器分发射和接收两大部分,电路见图1。
This tester is designed for the current meter in the cable channel than the test. It is the use of cable cable and water, to form a loop while transmitting and receiving both signals. In this way, a cableway station may not be measured on board. In addition, the cableway suspended flowmeter for the ratio test to avoid the impact of shipwreck and hull beam current, reduce the error than the measurement should be to improve accuracy. After the trial production of this instrument, we conducted a ratio test in medium and small rivers at water depths of 1 to 3 meters and water depths of 10 meters, with good results and clear signals. The device is briefly described below. The instrument is divided into transmitting and receiving two major parts, the circuit shown in Figure 1.