CN104279971A - Bi-chord method for measuring diameter of cylinder hole through electric eye measuring device of universal length measuring gauge - Google Patents
Bi-chord method for measuring diameter of cylinder hole through electric eye measuring device of universal length measuring gauge Download PDFInfo
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- CN104279971A CN104279971A CN201410556629.4A CN201410556629A CN104279971A CN 104279971 A CN104279971 A CN 104279971A CN 201410556629 A CN201410556629 A CN 201410556629A CN 104279971 A CN104279971 A CN 104279971A
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- electric eye
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Abstract
The invention discloses a bi-chord method for measuring the diameter of a cylinder hole through an electric eye measuring device of a universal length measuring gauge. An electric eye workbench and an electric eye measuring head are installed on the universal length measuring gauge, and an electric eye control circuit is connected. The cylinder hole to be measured is formed in the electric eye workbench and fixed through a pressing plate. The relative position of the hole to be measured and the electric eye measuring head is adjusted so that the electric eye measuring head can be located near the diameter of the hole to be measured. As shown in the figure 1, the chord length of the Y1 position is measured, and the moving distance L1 of the sphere center of the measuring head is recorded; a microdrum of the workbench is rotated so that the hole to be measured can be moved by a section of distance H, the distance H is read from the microdrum, the chord length of the Y2 position is measured, the moving distance L2 of the sphere center of the measuring head is recorded, and the diameter of the cylinder hole can be obtained through calculation, and the method is called as the bi-chord method. Compared with a traditional method, the bi-chord method has the advantages that during measuring, the diameter position of the cylinder hole does not need to be accurately found, auxiliary measuring, calculating and adjusting before measuring are removed, and the measuring efficiency is improved.
Description
Technical field
The present invention relates to the measuring method of cylinder bore diameter, particularly two string methods of cylinder bore diameter measured by a kind of electric eye measurement mechanism of universal comparator.
Background technology
When using the electric eye measurement mechanism of universal comparator to measure cylinder bore diameter, adopt a spherical measuring head, move to the opposite side of hole wall from the side of hole wall, instrument reads displacement, this distance is added with measuring head diameter, just obtains the diameter in hole.Due in above process, adopt the contact condition of electronic light emitting devices instruction measuring head and hole wall, therefore equipment therefor is referred to as " electric eye ".There is not ergometry in this device, has comparatively high measurement accuracy, may be used for the demarcation of ring standard gauge diameter.But the defect of this measuring technique is: in measuring process, the motion track of the measuring head centre of sphere must be strict with measured hole center, the accuracy of measurement of guarantee diameter, this needs to carry out some subsidiaries and calculating before measuring, above requirement could be met, not only reduce measurement efficiency, the subsidiary carried out and calculating also may bring operate miss, the accuracy that impact is measured.
Summary of the invention
The invention discloses a kind of electric eye measurement mechanism of universal comparator that uses and measure two sections of chord lengths of cylindrical hole and the distance of two strings, by calculating, indirectly obtaining the measuring method of bore dia, being called two string method.The relation of bore dia and chord length is as shown in Fig. 1 and formula (1):
In formula:
d---tested cylinder bore diameter;
d 0---spheric probe diameter;
l l,
l 2---on two strings, the distance of measuring head centre of sphere movement;
h---the distance of two strings.
Formation of the present invention: two string methods of cylinder bore diameter measured by a kind of electric eye measurement mechanism of universal comparator, it is characterized in that: measure two sections of chord lengths of cylindrical hole and the distance of two strings, universal comparator is installed electric eye worktable and electric eye gauge head, connect electric eye control circuit, measured circle post holes to be arranged on electric eye worktable and to fix with pressing plate; The relative position of adjustment measured hole and electric eye gauge head, makes electric eye gauge head be positioned near measured hole diameter; Measure
y 1 the chord length at place, writes down measuring head centre of sphere displacement
l l ; Then rotary work-table microdrum, makes measured hole move a segment distance H, and on microdrum, reads this distance, measures
y 2 the chord length at place, writes down measuring head centre of sphere displacement
l 2 , calculate measured hole diameter by formula (1)
d;
In formula:
d---tested cylinder bore diameter;
d 0---spheric probe diameter;
l l,
l 2---on two strings, the distance of measuring head centre of sphere movement;
h---the distance of two strings.
Compared with the prior art, the advantage of the method is: during measurement, does not need the position finding cylinder bore diameter, as long as measure the distance between two sections of chord lengths and two strings near diameter, can calculate cylinder bore diameter.Compared with classic method, eliminate the subsidiary before measurement, calculating and adjustment, improve measurement efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that two string method measures cylinder bore diameter.
Embodiment
This method electric eye measurement mechanism used, comprises electric eye worktable and electric eye gauge head, is the indispensable annex of universal comparator, does not need extra increase other device any or annex again.
Universal comparator is installed electric eye worktable and electric eye gauge head, connects electric eye control circuit.Measured circle post holes to be arranged on electric eye worktable and to fix with pressing plate; The relative position of adjustment measured hole and electric eye gauge head, makes electric eye gauge head be positioned near measured hole diameter; As shown in Figure 1, measure
y 1 the chord length at place, writes down measuring head centre of sphere displacement
l l ; Then rotary work-table microdrum, makes measured hole move a segment distance H, and on microdrum, reads this distance, measures
y 2 the chord length at place, writes down measuring head centre of sphere displacement
l 2 , calculate measured hole diameter by formula (1)
d.
In order to ensure the accuracy of measuring, should note: two strings must be selected near diameter.Article two, the distance of string
hnot easily excessive, when
h=(1/20 ~ 1/40)
dtime, measuring accuracy is the highest.
Claims (1)
1. two string methods of the measurement of the electric eye measurement mechanism with a universal comparator cylinder bore diameter, it is characterized in that: measure two sections of chord lengths of cylindrical hole and the distance of two strings, universal comparator is installed electric eye worktable and electric eye gauge head, connect electric eye control circuit, measured circle post holes to be arranged on electric eye worktable and to fix with pressing plate; The relative position of adjustment measured hole and electric eye gauge head, makes electric eye gauge head be positioned near measured hole diameter; Measure
y 1 the chord length at place, writes down measuring head centre of sphere displacement
l l ; Then rotary work-table microdrum, makes measured hole move a segment distance
h, and on microdrum, read this distance, measure
y 2 the chord length at place, writes down measuring head centre of sphere displacement
l 2 , calculate measured hole diameter by formula (1)
d;
In formula:
d---tested cylinder bore diameter;
d 0---spheric probe diameter;
l l,
l 2---on two strings, the distance of measuring head centre of sphere movement;
h---the distance of two strings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556629.4A CN104279971A (en) | 2014-10-20 | 2014-10-20 | Bi-chord method for measuring diameter of cylinder hole through electric eye measuring device of universal length measuring gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556629.4A CN104279971A (en) | 2014-10-20 | 2014-10-20 | Bi-chord method for measuring diameter of cylinder hole through electric eye measuring device of universal length measuring gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104279971A true CN104279971A (en) | 2015-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410556629.4A Pending CN104279971A (en) | 2014-10-20 | 2014-10-20 | Bi-chord method for measuring diameter of cylinder hole through electric eye measuring device of universal length measuring gauge |
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| CN (1) | CN104279971A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066893A (en) * | 2015-07-21 | 2015-11-18 | 湖南大麓管道工程有限公司 | Underground pipeline parameter measurement device and measurement method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737495A (en) * | 2005-07-12 | 2006-02-22 | 长安汽车（集团）有限责任公司 | Method for measuring bore diameter with fixed direction utilizing three coordinate measuring machine |
| CN103278100A (en) * | 2013-06-19 | 2013-09-04 | 天津大学 | Aperture measuring method based on non-contacting type sensor combination |
| CN103591899A (en) * | 2013-11-11 | 2014-02-19 | 南京理工大学 | Device and method for detecting wheel diameter of urban rail vehicle through sensors installed on arc in normal direction |
-
2014
- 2014-10-20 CN CN201410556629.4A patent/CN104279971A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737495A (en) * | 2005-07-12 | 2006-02-22 | 长安汽车（集团）有限责任公司 | Method for measuring bore diameter with fixed direction utilizing three coordinate measuring machine |
| CN103278100A (en) * | 2013-06-19 | 2013-09-04 | 天津大学 | Aperture measuring method based on non-contacting type sensor combination |
| CN103591899A (en) * | 2013-11-11 | 2014-02-19 | 南京理工大学 | Device and method for detecting wheel diameter of urban rail vehicle through sensors installed on arc in normal direction |
Non-Patent Citations (3)
| Title |
|---|
| 刘海宁等: "双弦法测量孔径的研究", 《宇航计测技术》 * |
| 胡清等: "万能测长仪的计算机辅助测试软件", 《光学仪器》 * |
| 郭连湘等: "《计量仪器与检测 下册》", 31 July 2006, 北京：化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066893A (en) * | 2015-07-21 | 2015-11-18 | 湖南大麓管道工程有限公司 | Underground pipeline parameter measurement device and measurement method thereof |
| CN105066893B (en) * | 2015-07-21 | 2017-09-01 | 湖南大麓科技有限公司 | A kind of underground piping parameter measuring apparatus and its measuring method |
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Application publication date: 20150114 |