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Smart Bolt and Its System

A technology of energy and energy storage unit, which is applied in the direction of radio wave measurement system, screws, threaded fasteners, etc., and can solve the problems of inability to obtain information and inability to obtain elongation

Active Publication Date: 2019-04-26
STRAIN LABS AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this known method, the elongation of the bolt is monitored while the bolt is being tightened / tightened, but no further information on the elongation is available when the tightening is terminated
Therefore, if the bolt is loose, no information can be obtained

Method used

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Examples

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Embodiment Construction

[0040] Certain embodiments will be described more fully hereinafter with reference to the accompanying drawings. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and to the present invention Those skilled in the art fully convey the scope of the present invention.

[0041] refer to figure 1 , a mechanical component or assembly schematically showing the shape of the smart bolt 1 in cross-section. The bolt 1 has a shaft 2 and a head 3 from which an elongated hole or cavity 4 extends into the shaft 2 . The hole 4 is preferably made as long and narrow as possible while still maintaining the strength of the bolt 1 . Hole 4 ends with the bottom. The cross-section of the hole 4 is preferably cylindrical. The diameter of the pores 4 is preferably as narrow as possible, for example ...

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Abstract

A bolt (100) that deforms when subjected to strain includes a cavity (104), an intelligent mechanism and means (105) for determining the strain and sounding an alarm at a predetermined value.

Description

technical field [0001] The present invention relates to the measurement of strain in mechanical components such as fastening devices (eg bolts). Background technique [0002] It is known from the prior art (for example according to US4553124) to install strain gauges inside the bolts in order to sense the strain. However, these known strain gauges are complex and expensive. Another disadvantage is that these strain gauges are temperature dependent. [0003] JP-A-11183280 describes a bolt tightening or tightening method in which the elongation of the bolt is measured while the tightening of the bolt is being performed. When the elongation reaches a predetermined value, the fastening or tightening operation is terminated. The method used to measure elongation includes the step of operating a laser. In this known method, the elongation of the bolt is monitored while the bolt is being tightened / tightened, but no further information on the elongation is available when the tig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/24
CPCG01L5/24F16B31/02G01L5/0004F16B2031/022F16B31/025G01B11/161G01S17/06
Inventor 莉娜·维丁·克拉森
Owner STRAIN LABS AB