基于双音频信号控制的水文缆道测沙自控仪的研制

DEVELOPMENT OF HYDROLOGICAL CABLEWAY SAND CONTROL MEASUREMENT INSTRUMENT BASED ON THE DOUBLE AUDIO FREQUENCY SIGNAL CONTROL

针对水文站中普遍使用的自动缆道测流仪器,均存在进水阀密封、信号控制、与缆道测流系统整合等诸多问题,研制了一种基于嵌入式的水文缆道测沙自控仪。该自控仪将双管双稳态水样采集阀门与铅鱼有机结合,合理布置进排水管线和通讯线路,水文缆道的水平和垂直运行准确定位,采用双音频信号传输可靠的控制水下采样器阀门的开关,测取断面各位置,不同水深的水样,并及时发回阀门开关状况信号。实践证明,由于采用了双管双稳态水样采集阀门解决了关闭状态下进水管淤积泥沙问题,同时阀门不必进行全密封,还实现了水文监测数据岸上至水中和水中至岸上的双向控制传输,研制的仪器获得成功应用。

According to the automatic cable measurement instruments widely used in hydrologic station, which has some problems such as cannot measurement and sampling sediment normally, we carried out the development of hydrological cableway sand control measurement instrument. The automatic control instrument will organically combine double tube double steady water sample collected valves and lead fish, reasonable decorate into the drainage pipeline and communication lines, the horizontal and vertical of hydrological cableway operate accurate positions, with double audio signal to transmit reliable control subsea sampler valve switch, acquisition section of each location, different depth of water samples, and send back the valve switch status signal in time. Practice has proved that the adoption of double tube double steady water samples collected valves can solve the problem of inlet pipe alluvial sediment under closed pressure, at the same time valve no need to seal. It also implements the hydrological monitoring data two-way transmission control of the bank to the water and the water to the shore.