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利用过河纜道,在岸上用滑車悬吊仪器測流时,一般都是双纜索过河,現介紹一种起点距的測法,供大家参考。在預定的起点距垂綫处的一根纜索上,用胶布包好,并登記好依次各垂綫的起点距。在滑車上用一根电綫連接两边的滑輪,在操作的一岸,将信号盒的两个电鍵分別用电綫連到两根纜索上,成一个閉合电路(如图)。測流时,打开信号盒的开关,将滑車向前滑动,此时电路通,信号連发,等滑車到达第一根垂綫处,由于一个滑輪在胶布上,故电路中断,信号停止,随即停止滑車的滑动,进行測深測速,这样依次向前測
The use of over the river cableway, on the shore with a trolley hanging instrument when measuring flow, are generally double cable across the river, is now introduced a starting point for the measurement method for your reference. At a predetermined starting point from a vertical line of cable, wrapped with tape, and register in order to each vertical starting distance. In the pulley with a wire connected to both sides of the pulley, in the operation of the shore, the signal box of the two keys are respectively wire connected to the two cables, into a closed circuit (Figure). When measuring the flow, open the switch of the signal box and slide the trolley forward. At this moment, the circuit is connected and the signal is sent repeatedly. When the trolley reaches the first vertical line, the circuit will be stopped and the signal stops due to a pulley on the tape Stop the slide of the trolley, measure sounding speed, so in turn measure forward