Calliper for measuring radius

An arc radius and caliper technology, applied in the field of measuring tools, can solve the problems of high manufacturing cost, difficulty in measuring the high precision of the ball head, unfavorable reading, etc., and achieve the effect of improving reliability and accuracy

Inactive Publication Date: 2010-07-28
梁加政
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Problems solved by technology

[0005] 1. The distance between adjacent scales on the main scale of the caliper is not equal, that is, the scale spacing of the main scale is not linearly equidistant, which is not conducive to reading
[0006] 2. Since the scale spacing of the main scale is not set linearly and equidistantly, and the scale spacing of the vernier scale of the caliper can only take the average value of the ratio of the scale spacing of the main scale, so the scale spacing of the vernier scale is also unequal, so that it cannot be measured Make the measured value more accurately reflect the true value of the measured arc radius
[0007] 3. Since the scale spacing of the main ruler is not set linearly and equidistantly, it can only be made into a caliper such as a vernier. When measuring a vernier caliper, it is relatively difficult to further improve the accuracy of the caliper system due to the influence of human vision, and it varies. If the caliper with scale spacing is to be made into a caliper with a table and a digital caliper, it is even more difficult
However, it is difficult to achieve high precision in manufacturing the measuring ball head, and its manufacturing cost is relatively high

Method used

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Embodiment Construction

[0038] The following combined with the attachment of the present invention is further detailed.

[0039] like figure 1 In theory, three points A, B, C are taken on the round O.AC, AD is constant value, AC is the height of the triangle ABC, OE is the height of the triangle OAC, BD> DC, BC 2 = R 2 -(B / 2) 2 EssenceObtain from the equation (1) and (2): (3) r 2 = (B / 2H) 2 A1 2 +(B / 2) 2 (Formula R> 0, A1> 0) or: (4) x 2 / (B / 2) 2 -Y 2 / H 2 = 1 (in the formula x> 0, y> 0).The constant of B and H Heng is, then the R value can be determined by the A1 value. When R = x = P> 0 (p is the constant), A1 (y value) and R (x value) are corresponding, A1+ A1+A2 is ABC three -point strings.That is, when the distance between the string height H and AB is constant constant, A2 is also constant, and the value of the string long A1+A2 is mainly determined by variable A1.According to the above, it can be known that the arc radius R is indirectly measured by measured A1+A2.That is to say, using the three p...

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Abstract

A calipers for measuring radius of arc consists of body with arc radius scale and vernier being able to slide along said body .It features that said arc radius scale is set in linear and interval way and correction is set correspondingly to arc radius scale on said body.

Description

【Technical Field】 [0001] The invention involves a amount of tools, especially a deck that measures the radius of the arc. 【Background technique】 [0002] At present, in order to measure the radius value of the arc, the RM or 3D fucking machines are commonly used.However, regulations can only be measured within a limited range.Although the 3D fucking machine can accurately measure the radius of the arc, and the measurement range is not limited, its price is expensive, large, and inconvenient to carry, resulting in limited places used. [0003] In order to solve the above -mentioned defects, the Chinese Practical New Type Patent (its announcement number CN2682373Y) announced on March 2, 2005 revealed another deck of the arc radius.The measurement principle of the caliper is: three points on the measured arc, the relationship between the three points, the chord height and the radius of the arc, that is, R = D 2 / 8H+H / 2 (R is the radius of the arc; D is the length of the string;There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B3/38
Inventor 梁加政
Owner 梁加政
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