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『Calculation formula for triangular weir flow』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Working principle of water measuring weir
1. Core conclusion of water measuring weir working principle: The water measuring weir measures the water level difference formed by the water flow passing through the weir plate, and calculates the open channel flow rate by combining the fluid mechanics formula. Its operation essence is the conversion of the functional relationship between water head and flow rate
2. Basic principle and structural composition. The water measuring weir is composed of a weir plate and a pressure measuring device. The weir plate is vertically installed in the channel to block the water flow and form a water level difference. When the water overflows from the weir crest or gap, the upstream is blocked and forms a measurable water head difference. The higher the water head, the greater the overflow. The Bernoulli equation can be used to convert the water level difference into a flow rate value. 3. Differences in flow calculation models. The shape of the weir plate directly affects the calculation formula. Triangle weir: The flow rate is proportional to the 5/2 power of the water head and is suitable for small flows; Rectangular weir: flow rate is related to the 3/2 power of water head, often used for moderate flow rates; • Trapezoidal weir: combining two forms, suitable for a wide range of flow rates. The formula contains shape coefficients and needs to be calibrated according to international standards or experimental data. 4. Data acquisition and transmission mechanism: Water level sensors (such as float type and ultrasonic type) capture real-time water head data in front of the dam, convert it into 4-20mA electrical signals or digital signals, and transmit them to the acquisiti
2. A graphic and text guide you to understand the water flow measuring instrument: water weir meter
A graphic and text guide you to understand the water flow measuring instrument: water weir meter 1 Introduction Principle: A water flow meter is an instrument used to measure water flow, typically in rivers or canals. The principle is to use the water level changes formed when water flows through a specific shaped dam to calculate the water flow rate. The specific process is as follows: the water meter is fixed in the river or canal, and the water level changes when the water flows through the dam. The equipment records the water level changes and time, and calculates the water flow rate by processing these data. The water measuring weir meter has important application value in water resource management, environmental monitoring, water conservancy engineering design and other fields. It can provide accurate and reliable data for engineering design and water resource management. 2. Functional characteristics: Main functions: linear measurement, absolute position output, non-contact continuous measurement, never worn out, sensor does not need calibration and regular maintenance, output signal has multiple options (RS485
5, voltage, current), easy and convenient installation. Applicable scenarios: Suitable for long-term measurement of water level in rivers, lakes, reservoirs, dam bodies and other weirs, it is an effect