Negative pressure type device for measuring density of object

Abstract

The invention relates to a negative pressure type device for measuring the density of an object. The negative pressure type device comprises a cylinder, a weighing table, a piston, a pressure sensor, a measured object temperature sensor and a gas temperature sensor, wherein the cylinder is placed on the weighing table; a piston capable of moving up and down is arranged at the top of the cylinder body; the pressure sensor, the gas temperature sensor and the measured object temperature sensor are arranged in the cylinder body and are communicated to the outside of the cylinder body; a tension device is arranged on the piston. The negative pressure type device for measuring the density of the object realizes measurement on the densities of objects with different states, different shapes and different characteristics under different temperatures according to the density measurement principle and based on the Clapeyron equation of ideal gas, and has the characteristics of scientific principle, simple structure, high easiness in operation and accurate result.

Description

technical field [0001] The invention relates to a device for measuring density, in particular to a negative pressure device for measuring object density. Background technique [0002] In scientific research and engineering practice, the density parameter is an important parameter in the engineering calculation simulation process and scientific research experiment process. As an important material parameter, it has a great influence on physical and chemical processes such as heat transfer, mass transfer and momentum transfer. In the measurement method of density parameters, usually when the measured object is solid, the liquid discharge method is often used, but it is not applicable to some liquid-sensitive substances; when the measured object is mostly fluid or powdery objects, it can be used for It is constrained to a regular shape, and the volume is calculated through liquid level sensor detection, but some irregularly shaped solids cannot be measured by existing devices....

AI Technical Summary

Problems solved by technology

In the measurement method of density parameters, usually when the measured object is solid, the liquid discharge method is often used, but it is not applicable to some liquid-sensitive substances; when the measured object is mostly fluid or powdery objects, it can be used for It is constrained to a regular shape, and the volume is calculated through liquid level sensor detection, but some irregularly shaped solids cannot be measured by existing devices

At the same time, these technical solutions can only give the density value of the measured object corresponding to a certain temperature, but cannot give the density value of the measured object under different temperature changes.

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