Device for measuring flow and flow velocity of drainage pipeline synchronously

Abstract

The invention relates to a device for measuring a flow and a flow velocity of a drainage pipeline synchronously. A water inlet is formed at the upper end of an impact-relief measuring water tank and a small hole is formed at the lower end of the impact-relief measuring water tank; a stabilized voltage supply is used for providing voltage for a differential pressure transducer; the differential pressure transducer is connected with the small hole at the lower end of the impact-relief measuring water tank through a hose and is used for generating a corresponding current according to the change of pressure intensity; an analog / digital (A / D) data acquisition card is used for acquiring the voltage of the two ends of a resistor which is connected with the differential pressure transducer, converting voltage signals into digital signals and sending the digital signals to a computer; a vidicon is used for taking a picture of a reference object moving with water flow in the drainage pipeline and transmitting the taken picture to the computer in real time; and the computer is used for receiving the real-time picture which is transmitted by the vidicon and computing the flow velocity of water in the drainage pipeline through an image acquisition frequency and a displacement distance of the image in each frame, and receiving the digital signals sent by the A / D data acquisition card and computing the flow of water in the drainage pipeline. The invention is applicable for measuring the drainage flow and the drainage flow velocity of the sanitary ware and the horizontal drainage pipeline in a building.

Description

technical field [0001] The invention relates to a flow and flow velocity measuring device, which is suitable for measuring the flow and flow velocity of drainage from sanitary appliances in buildings, and belongs to the technical field of water supply and drainage. Background technique [0002] With the increasing shortage of water resources, it is imperative to save water for sanitary appliances. In order to study the water-saving potential of sanitary appliances, it is necessary to study and analyze the hydraulic characteristics of the outflow, and the flow rate and flow velocity are the two most important characteristic indicators in the hydraulic characteristics. At present, the traditional flow measurement devices mainly include volumetric measurement devices and mass method measurement devices; the traditional flow velocity measurement methods are mainly the average flow velocity measurement method between sections. [0003] Both volumetric flow measuring devices and ...

AI Technical Summary

Problems solved by technology

These two flow measurement methods have a common feature that the obtained flow value is the average flow, not the instantaneous flow value, which cannot reflect the time-varying process of the outflow of the sanitary ware in a drainage process, and cannot reflect the real flow of the sanitary ware. outflow characteristics

[0004] Similarly, the method of measuring the average flow velocity between sections also has the same disadvantages as the above-mentioned method of flow measurement. It also obtains the average flow velocity by calculating the time of water flowing between two sections, which cannot truly reflect the instantaneous time when the water flows through a certain section. The flow velocity cannot reflect the flow velocity distribution of the water flow in the pipeline

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