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一种测定河流悬移质含沙量的仪器已研制并进行了试验。这种仪器系悬吊在河流中,当水流流过仪器中一个振动的管子时,其振动频率发生变化,并与含沙量大小有关。在粉沙和细沙范围,呈线性关系,灵敏度约为770(mg/L)/μs。用糖水试验,结果类似。在1～40℃水温范围内,仪器对温度的响应近乎线性,比率为1.69μs/℃。在1～2m/s流速范围内.管中流速减慢。振动周期增加为10μs/(m/s)。压缩氦气能有效地传导器内热量,使仪器适应温度的变化。
An instrument to determine sediment concentration in river sediments has been developed and tested. This type of instrument is suspended in a river. When the water flows through a vibrating tube in the instrument, its vibration frequency changes and is related to the amount of sediment it contains. In the sand and sand range, a linear relationship, the sensitivity of about 770 (mg / L) / μs. With sugar test, the results are similar. In the temperature range of 1 ~ 40 ℃, the response of the instrument to temperature is almost linear, the ratio is 1.69μs / ℃. In the range of 1 ~ 2m / s, the flow velocity in the pipe slows down. The vibration period is increased by 10 μs / (m / s). Compressing helium can effectively heat the heat exchanger to adapt the instrument to changes in temperature.