Method for measuring object density based on air pressure process

A technology of gas pressure and objects, applied in the direction of measuring devices, specific gravity measurement, instruments, etc., can solve the problem of scarcity of cotton fiber material density measurement methods, and achieve the effect of improving accuracy

Inactive Publication Date: 2015-07-29
闫语童
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the existing methods for measuring the density of cotton fiber substances are scarce, the present invention provides a new method for measuring the density of cotton-like substances by using the gas pressure method

Method used

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  • Method for measuring object density based on air pressure process
  • Method for measuring object density based on air pressure process
  • Method for measuring object density based on air pressure process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for measuring the density of an object based on the gas pressure method, the method adopts a device capable of measuring the gas pressure coefficient to measure the density of the object,

[0033] The device capable of measuring the gas pressure coefficient includes a sealed container 1 with a sealed cover 3 and a volume scale 4, a thermometer 2, a load cell 5 and a pressure sensor 6, wherein a piston 8 is arranged on the sealed container 1, and the piston 8 will The container is sealed, the thermometer 2 is arranged inside the sealed container 1, the pressure sensor 6 is arranged inside the sealed container 1, and is connected to the dynamometer 5 arranged outside the sealed container 1 through the hose 7, and the dynamometer 5 is connected to the piston 8;

[0034] The method for measuring the density of an object using the device capable of measuring the gas pressure coefficient comprises the following steps:

[0035] (1) Open the sealing cover 3, pull the p...

Embodiment 2

[0058] Adopt the method of embodiment 1, measure the density of plastic block and stone block.

[0059] Table 1 shows the density of plastic blocks and stones measured by the traditional object density measurement method - hydrostatic measurement method.

[0060] Table 2 shows the densities of the plastic blocks and stones measured by the method described in Example 1, wherein the plastic blocks and stones are the plastic blocks and stones used for measurement in Table 1. According to the corresponding volume of the plastic block or stone when the volume change of the syringe after adding the plastic block or stone is 10ml, 20ml, 30ml respectively, the density of the plastic block or stone is calculated.

[0061] Table 1. The data of the measured object measured by the hydrostatic measurement method (traditional method)

[0062]

[0063] Table 2. The plastic block and stone block density that the inventive method measures

[0064]

[0065]

[0066] The results in Ta...

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Abstract

The invention provides a novel method for measuring object density based on an air pressure process. According to the method, the density of an object can be measured by a device capable of measuring an air pressure coefficient. The device comprises a sealed container provided with a sealing cover and volume scales, a thermometer, a dynamometer and a pressure sensor, wherein a piston is arranged on the sealed container; during measurement, the piston is pushed to different scales to change the pressure in the container; the volume V0 in the container is calculated by utilizing an ideal air equation PV=nRT on the premise that the temperature is the same and the mass is the same; after a to-be-measured object is arranged in container, the volume V1 in the container is measured by the same method; the difference of the volume V0 and the volume V1 is the volume V of the to-be-measured object; finally the density of the to-be-measured object can be obtained according to a formula Rho=m/V. The method disclosed by the invention has the advantages of preventing influences on the volume of the object caused by existence of liquid, improving the measurement accuracy by calculating the volume changes by air pressure and temperature changes and being suitable for measuring the density of objects such as cotton and sponge.

Description

technical field [0001] The invention belongs to the technical field of material physical characteristic detection, and in particular relates to a new method for measuring the density of cotton-like substances based on a gas pressure method. Background technique [0002] Density is a physical quantity that describes the intrinsic characteristics of a substance, and has nothing to do with the external characteristics such as the shape and luster of the system it consists of. The methods of measuring the density of matter can be classified into direct measurement and indirect measurement. For a homogeneous substance, the density is the ratio of the mass m of the substance to its volume v, that is [0003] ρ = m v - - - ( 1 ) [0004] Therefore, direct measurement is to determine the density of the object through the determination of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00
Inventor 闫语童
Owner 闫语童
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