Method for Measuring Density of Cotton-like Substances Using Young's Modulus Extensometer
A technology of Young's modulus and extensometer, which is used in measuring devices, specific gravity measurement, instruments, etc., to achieve the effect of high accuracy and simple operation
Inactive Publication Date: 2017-10-31
刘毅
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Problems solved by technology
[0003] In view of the current problem that it is difficult to measure the density of objects such as cotton objects that are irregular in shape and stained with water or oil, and whose accurate volume cannot be measured by conventional methods, the purpose of the present invention is to provide an experimental method for measuring Young's modulus. new method to measure the density of such objects
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Embodiment 1
[0035] Example 1 Gas pressure method to measure object density and verify accuracy
[0036] 1. Young's Modulus Extensometer Setup
[0037] The Young's modulus tensile instrument is a product produced by Dalian Ningnuoqi Science and Education Instrument Co., Ltd., the model is NKY-2, and the schematic diagram is as follows figure 1 As shown, it includes the stretched steel wire and the drill bit clamp used to fix the stretched steel wire, the air bag, the force meter and the electronic digital display system. The connecting rod of the drill card breaks through the bushing in the middle of the fixed platform and is connected with the tension sensor. The airbag and the accelerometer are connected by a hose, and the tension sensor transmits the applied force of the accelerometer to the electronic digital display system, which is displayed on the LCD screen, and the applied force of the accelerometer is changed by the hydraulic control valve; Counts as a 400ml syringe.
[0038] ...
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The invention discloses a method for measuring the density of cotton materials by using a Young's modulus stretcher. The method improves the setting of a commonly used digital display hydraulic force Young's modulus measuring instrument: the liquid in the hose and the syringe Evacuate and replace with air; screw the drill bit clamp of the stretched steel wire to the frame tightly so that the length of the stretched steel wire does not change. The present invention uses an improved Young's modulus extensometer to measure the applied pressure when changing the volume of the device and calculates the volume of the measured object, and then calculates the density of the measured object, and the result is consistent with the density data measured by the traditional method Close, the experiment is basically consistent with the theory, and it is practicable. The measuring method of the invention has simple operation and high accuracy, is very suitable for measuring the density of objects such as cotton sponges which are difficult to measure density by conventional methods, and will not damage or wet the measured objects.
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 by using a Young's modulus extensometer. Background technique [0002] For a homogeneous substance, the mass per unit volume is the density. Density is an inherent property of matter, and it does not change with changes in its composition, shape, luster and other external characteristics. For geometric objects with uniform shape and regular shape, their density can be determined by measuring their basic quantities, but this method cannot be used for measurement of objects with irregular shapes, especially cotton objects with irregular shapes and stained with water or oil The exact volume cannot be measured, and there is air in the cotton fiber, which cannot be counted as the volume of cotton. No matter how squeezed and rubbed, the gas cannot be completely discharged. ...
Claims
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IPC IPC(8): G01N9/00
Inventor 刘毅
Owner 刘毅