Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Measuring system of nanometer precision metal linear expansion coefficient

A measurement system and metal wire technology, applied in the thermal expansion coefficient of materials, measuring devices, instruments, etc., can solve the problems of large errors and low efficiency, and achieve the effects of high precision, simple operation, and strong reliability

Inactive Publication Date: 2012-06-13
SOUTHWEST UNIVERSITY
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing detection methods in China generally use tools such as micrometers and traditional optical levers for visual inspection. These methods are not only inefficient, but also have large errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Measuring system of nanometer precision metal linear expansion coefficient
  • Measuring system of nanometer precision metal linear expansion coefficient
  • Measuring system of nanometer precision metal linear expansion coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The length of a solid generally increases with the increase of temperature. Suppose that when the temperature of a solid changes from t to t+dt, its length changes from L to L+dl. When the temperature change dt is small enough, the small change in length dL and temperature change dt is proportional to the original length L, namely

[0019] dl=α×L×dt that is α = 1 L × dl dt - - - ( 1 )

[0020] The proportional coefficient α is called the linear expansion coefficient of the solid material, which means the relative elongation of the solid when the temperature rises by 1C. Generally, it changes very little with the temperature. When the temperature does not change too much, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a measuring system of nanometer precision metal linear expansion coefficient, which includes an optical lever micrometric system, a temperature control system, a temperature collecting system and a virtual platform, wherein the optical lever micrometric system includes a first plane mirror (M1) and a second plane mirror (M2) that are arranged in parallel, and a position sensing detector (PSD); the temperature collecting system includes a thermocouple and a signal conditioning board; the temperature control system receives the control signal through a silicon-controlled trigger panel in the temperature control system, so as to control the conduction and cut-off of the controlled silicon and then control the heating temperature of the to-be-measured metal; and the visual platform includes a displacement signal collecting module, a temperature signal collecting module, a PID regulating module and a data processing module. The system can set and precisely control the temperature of the to-be-measured metal material, determines the linear expansion coefficient of the metal material with high precision, has high detecting speed, precision and reliability, is visual to see, and is simple to operate.

Description

technical field [0001] The invention belongs to the technical field of metal thermal expansion measurement, and in particular relates to a high-precision measurement system and method for metal linear expansion coefficient. Background technique [0002] "Expansion with heat and contraction with cold" is a characteristic of many objects. It is caused by the intensification or weakening of the thermal motion of molecules inside the object, which makes the molecules of the substance become larger or smaller on average. Although the thermal expansion is not large, it can produce a lot of stress. . Therefore, it must be fully considered in engineering design, mechanical manufacturing, material processing and other processes. In general, the expansion law of a solid in all directions is the same, so the linear expansion law of a solid in one direction can be used to characterize its volume expansion. The existing detection methods in China generally use tools such as micrometers...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/16G01B11/16
Inventor 谭兴文
Owner SOUTHWEST UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com