Real-time runoff sediment content measuring device and measuring method

Abstract

The invention discloses a real-time runoff sediment content measuring device and a measuring method, belonging to the technical field of measurement. The real-time runoff sediment content measuring device comprises a measuring barrel, a weighing sensor, a water discharging pipe, an electric valve, a liquid-level sensor, a controller and a processor, wherein the measuring barrel is placed on the weighing sensor; the electric valve is arranged on the water discharging pipe at the bottom of the barrel; the liquid-level sensor is arranged above the measuring barrel; the processor is connected with the weighing sensor, the electric valve and the liquid-level sensor by the controller respectively. The measuring method comprises the steps of setting the highest and lowest water levels in the measuring barrel and the switching-on time and the switching-off time of the electric valve; continuously guiding muddy water into the measuring barrel, measuring the height of the water level in the measuring barrel and the weight of water in the measuring barrel, and transmitting obtained values to the processor by the controller; when the water level rises to the highest water level, switching on the electric valve and discharging the water in the measuring barrel; when the water level falls to the lowest water level, switching off the electric valve; and processing obtained and set parameters by adopting the processor so as to obtain the weight of the runoff sediment of the barrel. The real-time runoff sediment content measuring device and the measuring method disclosed by the invention have the advantages that the content of the runoff sediment with different soils can be accurately measured and online measurement can be realized.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a device for measuring sediment content and a method for measuring the total amount of runoff by using the device. Background technique [0002] At present, there are two methods used to measure the runoff sediment content. One is the direct measurement method, such as the drying method, also known as the weighing method. Determine the sand content in the mud water, but because the drying method needs to dry the sample to be tested, and the drying temperature is generally 105°, heating takes about 11 hours, high temperature and long-term heating will cause the organic matter in the soil to be carbonized, and The measured sand concentration is relatively small, and the requirements for drying temperature and heating time also make the entire measurement process time-consuming and laborious. In the field, when people use the drying method to measure the sand concen...

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Problems solved by technology

[0002] At present, there are two methods used to measure the runoff sediment content. One is the direct measurement method, such as the drying method, also known as the weighing method. Determine the sand content in the mud water, but because the drying method needs to dry the sample to be tested, and the drying temperature is generally 105°, heating takes about 11 hours, high temperature and long-term heating will cause the organic matter in the soil to be carbonized, and The measured sediment concentration is relatively small, and the requirements for drying temperature and heating time also make the entire measurement process time-consuming and laborious

In the wild, when people use the drying method to measure the sand concentration on the spot, the alcohol burning dry method will cause a large error in the measured sand concentration, and it cannot realize real-time online detection.

Another method is the indirect measurement method, such as capacitance method, laser method, γ-ray method, etc., but affected by temperature, sediment particles, etc., the measurement error is relatively large, especially when the sediment concentration is large or small, it is difficult to measure Achieving Accurate Measurements

In 2011, our research group applied for a utility model patent "Measuring Device for Sediment Content in Mud Water" (Patent No. ZL201120215645.9). Its measurement accuracy has dropped significantly. The reason is that a pressure sensor was used to measure the liquid level, and an ultrasonic sensor was used to measure the liquid level, and the difference between the two liquid levels was used to calculate the sediment content in the muddy water. However, when the muddy water When there is too much sand, the sediment covers the measuring surface of the pressure sensor, which greatly reduces the measurement accuracy

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