Wide-range high-precision automatic runoff yield measurement system

Abstract

The invention provides a wide-range high-precision automatic runoff yield measurement system comprising a power supply unit, a water tank, a water outlet, a water outlet control valve, a pressure level sensor, a first liquid level sensor, a second liquid level sensor, a turbine flow sensor, a controller, and a data collector; the water tank is used for receiving runoff of a slope and storing runoff water; the water outlet and the water outlet control valve are connected to the water tank; the pressure level sensor disposed inside the water tank is used for detecting interior level of the water tank; the first liquid level sensor is disposed on the lower portion of the water tank; the second liquid level sensor is disposed on the upper portion of the water tank; the turbine flow sensor is disposed at the water outlet; the controller controls the water outlet control valve according to the first liquid level sensor and the second liquid level sensor; the data collector measures runoff and collectors and stores data according to an output value of the pressure level sensor and an output value of the turbine flow sensor. The wide-range high-precision automatic runoff yield measurement system has wide runoff measurement range and high measurement precision and is good in timeliness and high in automation level.

Description

Technical field [0001] The invention relates to the technical field of hydrology research, in particular to a large-range high-precision automatic flow rate measurement system. Background technique [0002] The study of rainfall runoff mechanism on hillsides is a basic part of hydrological research, and it can provide scientific basis for the establishment of a distributed hydrological model of watershed with stronger physical foundation, which is of great significance. In the study of rainfall runoff mechanism on mountain slopes, field observation experiments on typical mountain slopes are irreplaceable and important. Field observation experiments in the study of rainfall runoff mechanism on hillsides require real-time and accurate measurement of the runoff rate on the hillside after rainfall. The runoff rate on hillsides has the characteristics of a very large range of flow rates. Normally, the runoff rate is very small. When the instantaneous rainfall is very large, the produ...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing flow measurement methods and technologies are usually difficult to combine the characteristics of large flow measurement range and high small and micro flow measurement accuracy, and it is difficult to work independently in the field for a long time due to problems such as power supply and data storage. It cannot be directly applied to field runoff observation experiments on hillsides, so it is difficult to meet the experimental requirements in the study of rainfall runoff mechanisms on hillsides

[0006] Regarding the technical methods such as the sump method, the multi-hole diversion method, and the tipping bucket self-recording flow measurement method, which are currently applied to the measurement of hillside runoff, the main problems in them are: under the first idea, the sump method and the multi-hole diversion method The essential principles are the same, but these two methods can only measure the total amount of runoff in a certain rainfall, and cannot measure the change process of runoff in real time and continuously. The degree of automation is not high, and maintenance is required after each rainfall. And when the production flow is large, overflow is prone to occur, resulting in large measurement errors; under the second idea, although the tipping bucket self-recording flow measurement method can realize real-time continuous measurement of the hillside production flow process, the degree of automation is relatively high , can work independently in the field for a long time, and can improve the flow measurement accuracy by adjusting the size of the tipping bucket, but the flow range that can be measured is always small, that is, the measuring range is small

If the tipping bucket is set larger, it can ensure the measurement of a larger flow rate, but the accuracy is very low when measuring a smaller flow rate; if the tipping bucket is set smaller, although the accuracy is higher when measuring a smaller flow rate, it is in Difficult to measure when the flow rate is large

This makes it difficult for this method to meet the requirement of equipment with a large flow measurement range in hillside flow measurement and to maintain high measurement accuracy for each flow within the range.

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