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在传统的水文缆道测流中,只能传递流速一种信号,常常因为滑轮及副索生锈而导致信号不通,造成信号时常中断,甚至完全不能使用,极大地制约了水文缆道优越性的发挥。通过我们潜心研究,设计一块电路板,该电路在水面、流速仪和河底开关接通时分别产生3种不同频率的交流信号,将其混合后经高频载波调制产生无线电信号,最后经天线将信号发射出去。在岸上控制室内的无线电接收机接收到信号后,通过高频解调,然后经选频电路即可将他们分离出来,成功地解决了以往水文缆道测流存在的信号传输难题。
In traditional hydrological cableway flow measurement, only one kind of signal of flow velocity can be transmitted, often the signal is blocked due to the rusting of the pulley and the auxiliary cable, which causes the signal to be interrupted frequently or even completely unable to be used, which greatly restricts the superiority of the hydrological cableway Play Through our painstaking research, the design of a circuit board, the circuit in the water, the flow meter and the river switch is turned on when the exchange of three different frequency signals, mixed with high-frequency carrier modulation to produce radio signals, and finally by the antenna Send out the signal. After receiving the signal from the on-shore control room radio receiver, it can be separated through the high-frequency demodulation and then selected by the frequency selection circuit, which successfully solves the problem of signal transmission in the hydrologic cableway flow measurement in the past.