CN1916564B - Method and equipment for measuring increment of circumferential arc length in columned sample - Google Patents
Method and equipment for measuring increment of circumferential arc length in columned sample Download PDFInfo
- Publication number
- CN1916564B CN1916564B CN2006100171424A CN200610017142A CN1916564B CN 1916564 B CN1916564 B CN 1916564B CN 2006100171424 A CN2006100171424 A CN 2006100171424A CN 200610017142 A CN200610017142 A CN 200610017142A CN 1916564 B CN1916564 B CN 1916564B
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- arc length
- steel wire
- sample
- measuring
- increment
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- A Measuring Device Byusing Mechanical Method (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A method for measuring increment of circumferential arc length on cylindrical test piece includes winding a measurement line on excircle of test piece and reserving certain tangent length then tightening it, measuring out increment of arc length by measuring shortened length of tangent line based on principle of changing partial tangent line to be arc length when excircle of test piece is expanded. The device for realizing said method is also disclosed.
Description
Technical field
The invention provides a kind of increment of circumferential arc length in columned sample measuring method and device, be used for column type rock sample compression test, belong to the engineer machinery test equipment technical field.
Background technology
At present, in to column type rock sample compression test process, owing to reasons such as the rock sample deflection are little, so the collection of data is difficult for accurately so far, also not having very good solution.
Summary of the invention
The invention provides a kind of increment of circumferential arc length in columned sample measuring method, can directly obtain circumferential arc length increment, arc length is converted into straight line, directly measure length and obtain circumferential arc length variable quantity, solved the measurement of cylinder circumferential arc length increment.
The present invention also provides the measurement mechanism that utilizes said method to make, and is applicable to suitability for industrialized production.
The present invention adopts a slotted line to be wrapped on the test specimen cylindrical and reserves certain length of tangent line, makes it to tighten; Utilize the test specimen cylindrical big time part tangent line that rises to be transformed into arc length, measure the length that tangent line shortens and be the arc length elongation.
Because the cause of slotted line diameter d, so this measuring amount is the arc length elongation that slotted line twines center circle (its diameter is D+d).It is not the arc length elongation of test specimen cylindrical (its diameter is D).But only differ from a constant between this measuring amount and the measured amount: Δ S=π d, wherein d is the diameter of slotted line.This error belongs to structural error, can reject.Because this measuring amount is greater than measured amount, this makes to measure has had amplification, and amplification coefficient is:
K＞1 obviously.
The size of COEFFICIENT K is relevant with the size of slotted line diameter d, and the big more K of d is also big more.The collection of data is easily accurate.If adopt the line footpath big, radial compliance is good, the slotted line that longitudinal stiffness is big in practice.
The technical solution of measurement mechanism of the present invention is as follows:
Being provided with at the two ends of measuring steel wire is two wire clamps, two wire clamps are contained on the guide rod, guide rod is contained on the bearing, spring housing is contained on the guide rod, come fastening steel wire by screw, and both-end all leaves certain length of tangent line, steel wire can be wrapped on the excircle of workpiece, under the effect of spring, steel wire is tightened, so that guarantee the straight line portion of steel wire and workpiece is tangent and conllinear, two wire clamps are fixed on the bent plate, and the bottom of bent plate is connected with sensor, can measure the displacement of steel wire by the distance of measuring bent plate, calculate the sample circumferential arc length increment by corresponding software processes, for measured object is fixed on the utility model, extension spring is hooked in bearing by pin and is provided with cooperation, this device can be fixed on the cylindrical of different-diameter.
Good effect of the present invention is: utilize the inventive method can directly obtain circumferential arc length increment, arc length is converted into straight line, directly measure length and obtain circumferential arc length variable quantity, solved in the column type rock sample compression test process, owing to reasons such as the rock sample deflection are little, so the collection of data is difficult for problem accurately.
Description of drawings
Fig. 1 is measuring method signal schematic diagram of the present invention.
Fig. 2 is a measurement mechanism structure principle chart of the present invention.
Embodiment
Embodiment 1
According to shown in Figure 1, adopt a slotted line 1, be wrapped on the test specimen cylindrical 11 and reserve certain length of tangent line, make it to tighten.When the test specimen cylindrical rises when big, then some tangent line will be transformed into arc length, and the length that tangent line shortens is the arc length elongation.
This measuring amount is the arc length elongation that slotted line twines center circle (its diameter is D+d), is not the arc length elongation of test specimen cylindrical (its diameter is D), and only differ from a constant between this measuring amount and the measured amount: Δ S=π d, wherein d is the diameter of slotted line.This error belongs to structural error, can reject.Because this measuring amount is greater than measured amount, this makes to measure has had amplification, and amplification coefficient is:
K＞1 obviously.The size of COEFFICIENT K is relevant with the size of slotted line diameter d, and the big more K of d is also big more.The collection of data is easily accurate.If adopt the line footpath big, radial compliance is good, the slotted line that longitudinal stiffness is big in practice.
Embodiment 2
According to shown in Figure 2, being provided with at the two ends of measuring steel wire 1 is two wire clamps 10, connect by guide rod 3 between the wire clamp 10, spring 6 is sleeved on the guide rod 3, guide rod 3 devices are on bearing 7, by screw 2 fastening steel wires 1, the both-end of steel wire 1 all leaves certain length of tangent line, steel wire 1 can be wrapped on workpiece 11 cylindricals, steel wire 1 is tightened, so that guarantee the straight line portion and the workpiece 11 tangent and conllinear of steel wire 1, two wire clamps 10 are separately fixed on the bent plate 5, the bottom of bent plate 5 is connected with sensor 4, can measure the displacement of steel wire 6 by the distance of measuring bent plate 5, sensor 4 connects computer system, calculates the sample circumferential arc length increment by corresponding software processes, for measured object is fixed on the utility model, extension spring 8 is fixed on the bearing 7 by pin hook 9.
Claims (1)
1. increment of circumferential arc length in columned sample measurement mechanism, be provided with two wire clamps at the two ends of measuring steel wire, two wire clamps are contained on the guide rod, guide rod is contained on the bearing, spring housing is contained on the guide rod, come fastening steel wire by screw, and certain length of tangent line is all left at the two ends of steel wire, steel wire is wrapped on the sample cylindrical, under the effect of spring steel wire is tightened, so that guarantee the straight line portion of steel wire and sample is tangent and conllinear, two wire clamps are fixed on the bent plate, the bottom of bent plate is connected with sensor, can measure the displacement of steel wire by the distance of measuring bent plate, calculate the sample circumferential arc length increment by corresponding software processes, for sample being fixed on this device, extension spring is hooked in bearing by pin and is provided with cooperation, this device can be fixed on the cylindrical of different-diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100171424A CN1916564B (en) | 2006-08-30 | 2006-08-30 | Method and equipment for measuring increment of circumferential arc length in columned sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100171424A CN1916564B (en) | 2006-08-30 | 2006-08-30 | Method and equipment for measuring increment of circumferential arc length in columned sample |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1916564A CN1916564A (en) | 2007-02-21 |
| CN1916564B true CN1916564B (en) | 2011-04-20 |
Family
ID=37737597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100171424A Expired - Fee Related CN1916564B (en) | 2006-08-30 | 2006-08-30 | Method and equipment for measuring increment of circumferential arc length in columned sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1916564B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759698B (en) * | 2014-01-16 | 2017-02-15 | 浙江大学 | System and method for fast measuring perimeter deformation quantity of horizontal type strain strengthening vessel |
| CN104501759B (en) * | 2014-12-03 | 2017-06-20 | 达涅利冶金设备（北京）有限公司 | A kind of spiral welded steel pipe measuring instrument |
| CN108562200A (en) * | 2018-01-19 | 2018-09-21 | 中南林业科技大学 | A kind of Portable standing wood gauging instrument based on ribbon amount arm anchor ear |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215034U (en) * | 1987-11-07 | 1988-07-13 | 国营526厂 | Long ruler for measuring flexible cylinders |
| US4905521A (en) * | 1988-12-16 | 1990-03-06 | Re/Spec Inc. | Ported jacket for use in deformation measurement apparatus |
| CN2153039Y (en) * | 1993-02-22 | 1994-01-12 | 中国矿业大学 | Circular direction displacement amplifier |
| CN2169884Y (en) * | 1992-12-08 | 1994-06-22 | 能源部西安热工研究所 | On-line monitoring alarm for main steam pipe anti-explosion |
| CN2303265Y (en) * | 1997-08-26 | 1999-01-06 | 中国科学院武汉岩土力学研究所 | Sliding trough like ring deformation measuring arrangement |
| CN2336321Y (en) * | 1998-08-07 | 1999-09-01 | 中国核动力研究设计院 | Steel tape for measuring diameter of steel flexible O-shaped ring |
-
2006
- 2006-08-30 CN CN2006100171424A patent/CN1916564B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215034U (en) * | 1987-11-07 | 1988-07-13 | 国营526厂 | Long ruler for measuring flexible cylinders |
| US4905521A (en) * | 1988-12-16 | 1990-03-06 | Re/Spec Inc. | Ported jacket for use in deformation measurement apparatus |
| CN2169884Y (en) * | 1992-12-08 | 1994-06-22 | 能源部西安热工研究所 | On-line monitoring alarm for main steam pipe anti-explosion |
| CN2153039Y (en) * | 1993-02-22 | 1994-01-12 | 中国矿业大学 | Circular direction displacement amplifier |
| CN2303265Y (en) * | 1997-08-26 | 1999-01-06 | 中国科学院武汉岩土力学研究所 | Sliding trough like ring deformation measuring arrangement |
| CN2336321Y (en) * | 1998-08-07 | 1999-09-01 | 中国核动力研究设计院 | Steel tape for measuring diameter of steel flexible O-shaped ring |
Non-Patent Citations (1)
| Title |
|---|
| CN 2303265 Y,全文. |
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| Publication number | Publication date |
|---|---|
| CN1916564A (en) | 2007-02-21 |
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| C14 | Grant of patent or utility model | ||
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Owner name: CHANGCHUN HUIKAI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHANGCHUN INST OF TESTING MACHINE Effective date: 20110623 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110623 Address after: 130012 No. 1118, Silicon Valley Avenue, Changchun, Jilin Patentee after: Changchun Huikai Technology Co., Ltd. Address before: 130012 No. 1118, Silicon Valley Avenue, Changchun, Jilin Patentee before: Changchun Inst of Testing Machine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20140830 |
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| EXPY | Termination of patent right or utility model |