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Three-point identifying arc measuring instrument and measuring method

A measuring instrument and a technology for predetermined measurement, applied in the direction of measuring devices, mechanical measuring devices, instruments, etc., to achieve the effects of simple measuring method, simple structure and convenient use

Inactive Publication Date: 2012-07-18
CHINA RAILWAY LONGCHANG MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no measuring instrument that is easy to operate and can directly measure the reading

Method used

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  • Three-point identifying arc measuring instrument and measuring method
  • Three-point identifying arc measuring instrument and measuring method
  • Three-point identifying arc measuring instrument and measuring method

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Embodiment Construction

[0021] A three-point fixed arc measuring instrument, such as figure 1 , figure 2 As shown, it includes: a main ruler 1 and two auxiliary rulers 2, one end of the main ruler and the auxiliary ruler are connected together through a central axis 7, and the other end is a measuring head, which is used to contact the measured arc; set on the main ruler 1 There is a main scale vernier 3, for the convenience of reading, a liquid crystal display 6 can also be set on the main scale vernier 3, and an auxiliary scale vernier 4 is arranged on the two auxiliary scale verniers 2; There is also a synchronous locking device that cooperates with each other. The function of the synchronous locking device is: when the three feet (main ruler and two auxiliary rulers) are close together, the three-foot vernier will move synchronously by opening the synchronous locking device. To adjust the predetermined measurement value, and after the adjustment, restore the synchronous locking device to the lo...

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Abstract

The invention discloses a three-point identifying arc measuring instrument and measuring method. The measuring method includes a main scale and two auxiliary scales, wherein one end of the main scale and one end of each auxiliary scale are connected through a central shaft respectively; and the other ends of the main scale and the two auxiliary scales are measuring heads; a main scale vernier is arranged on the main scale, and auxiliary scale verniers are arranged on the two auxiliary scales; and synchronous locking devices mutually matched are arranged on the main scale and the two auxiliary scales. The invention has the positive effects as follows: according to the theorem of three-point identifying center, an arc is measured by three measuring feet extending from an identical circle center and having the same length, and the three measuring feet having the same length are contacted with three arbitrary and un-coincident points on the same arc; and when the conditions are met, the length value of the measuring feet is the radius of the arc. The measuring instrument disclosed by the invention has a simple structure and is convenient to use; and the measuring method disclosed by the invention is simple, convenient and fast, and can read out the radius of the measured arc directly without calculations.

Description

technical field [0001] The invention relates to the technical field of large arc radius measurement, in particular to a three-point fixed arc measuring instrument and a measuring method. Background technique [0002] The large arc radius measurement actually used at present all adopts the arc template comparison, which can only determine whether the measured arc is within the expected range. There are also some methods to get the result through calculation. And there is no measuring instrument that is easy to operate and can directly measure the reading. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a three-point fixed arc measuring instrument and a measuring method. [0004] The technical solution adopted by the present invention to solve the technical problem is: a three-point fixed arc measuring instrument, including a main scale and two auxiliary scales, one end of the main sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/213
Inventor 邓超云张栋邓明飞
Owner CHINA RAILWAY LONGCHANG MATERIALS
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