Liquid-gas conversion pressure measuring device and experimental pressure measuring device with synchronous electric measurement and digital display

Abstract

The invention discloses a liquid-gas conversion pressure measurement device and a pressure measurement device with the synchronous electrical measurement and digital display for tests. The liquid-gas conversion pressure measurement device comprises a pressure measurement tube, with a communication positioning tube, and a pressure difference sensor. One end of the communication positioning tube is located in the pressure measurement tube, the end tangent plane is a horizontal one, and the other end is located outside the pressure measurement tube; the pressure difference sensor is connected to the pressure measurement tube and is used for detecting the difference of the pressure of the compressed air in the pressure measurement tube and the outside air pressure. The pressure measurement device with the synchronous electrical measurement and digital display for tests comprises the liquid-gas conversion pressure measurement device, a pressure measurement tube and a ruler which is arranged on the surrounding of the pressure measurement tube and which is used for calibrating the level in the pressure measurement tube. A traditional pressure measurement tube used for measuring the water head pressure in basic tests of hydrodynamics and hydraulics can be widely replaced with the pressure measurement device, the basic principle of the hydrodynamics is utilized ingeniously, the traditional measurement manner and the novel measurement manner are combined well, and the fine teaching effect is achieved.

Description

technical field [0001] The invention relates to the field of experimental measurement, in particular to a liquid-gas conversion pressure measuring device and an experimental pressure measuring device with synchronous electric measurement and digital display. Background technique [0002] Hydraulics and Fluid Mechanics is a major professional basic course for many majors in engineering colleges. Modern hydraulics is based on the three pillars of experiment, theory and calculation. Therefore, experiment is an indispensable content in the teaching process. Among them, the piezometric tube is one of the most commonly used pressure measuring instruments in the process of hydraulic and fluid mechanics experiments. It is the simplest type of liquid column pressure gauge. It uses a transparent straight glass tube with a diameter of The lower end of the pipe is sealed with the measuring point through a hose, and the upper end of the pipe is open to the atmosphere. According to the r...

AI Technical Summary

Problems solved by technology

This kind of pressure measuring tube with synchronous digital display cannot be found in the market, and there is no design plan. Several problems involved in it may be difficult to solve well:

[0005] (1) The piezometric tube is fixed vertically on the test bench by a shelf, and the scale scale of the piezometric tube is also the same. High and low, relative to the experimental table, there is an up and down deviation. How to keep the zero elevation of the piezometric tube scale in the air (the reference zero elevation of the piezometric tube water head) and the zero point of the differential pressure measured by the differential pressure sensor are accurately maintained at the same zero position.

Images