CN102297647B - Inductive type sliding micrometer - Google Patents
Inductive type sliding micrometer Download PDFInfo
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- CN102297647B CN102297647B CN2011101333130A CN201110133313A CN102297647B CN 102297647 B CN102297647 B CN 102297647B CN 2011101333130 A CN2011101333130 A CN 2011101333130A CN 201110133313 A CN201110133313 A CN 201110133313A CN 102297647 B CN102297647 B CN 102297647B
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- 230000001939 inductive effect Effects 0.000 title abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000006698 induction Effects 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 28
- 238000000034 method Methods 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 239000000523 sample Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The invention discloses an inductive type sliding micrometer which is characterized by comprising a shell, a central support rod arranged in the shell, two groups of inductive coils arranged on the central support rod and spaced at a distance, elastic connecting rods arranged at two ends of the central support rod, sealing bases sleeved at the ends of the elastic connecting rods and sealed together with the two ends of the shell, wherein the sealing base at one end is in sealed connection with one end of a cable outlet base, the other end of the cable outlet base is in sealed connection with an air socket; and a measurement circuit board connected with the inductive coils. The inductive type sliding micrometer provided by the invention has the advantages of high sensitivity, high measurement precision, large measurement range, high stability, no mechanical abrasion, rapid location, convenience in operation and convenience in carrying. A probe cannot be contacted with a measuring mark in a measurement process. The inductive type sliding micrometer can be applied to a gauging pipe of a movable gradiograph and can work under a certain water pressure.
Description
Technical field
The present invention relates to a kind of slip micrometer, belong to the technology of instrument and meter field.
Background technology
The slip micrometer is widely used in the axial displacement of survey line in the boring of measuring any direction accurately and rock, concrete or the soil.At present, the slip micrometer mainly contains two kinds from the metering system branch, a kind of is the slip micrometer of contact type measurement, the flexible member of the slip micrometer stretching instrument of this mode adopts the localization method of sphere and the conical surface, the gauge head that makes the instrument two ends closely contacts with adjacent two marks respectively, relative displacement by the deflection of measuring flexible member records adjacent two marks by the intrinsic gauge length of instrument and the relative displacement that records, calculates the distance between two adjacent marks.The flexible member of instrument needs bigger external force just can be stretched, and wastes time and energy with measuring process in the instrument location, operation inconvenience; In case the locating surface of gauge head and mark has attachment, the measuring accuracy of instrument will be had a strong impact on; The locating surface of gauge head, mark is easy to wear or distortion because of the impact that frequently is subjected to the instrument tensile force, thereby influences stability and the reliability of instrument; The processing request height of instrument gauge head and mark, complex structure, production cost is higher.
Another kind is the induction type slip micrometer of non-cpntact measurement, and gauge head and the induction of the adjacent two marks relative displacement that record two marks of instrument by two ends by the intrinsic gauge length of instrument and the relative displacement that records, calculates the distance between adjacent two marks.The sensitivity of instrument and measuring accuracy are restricted by measurement range, and measuring accuracy was significantly on the low side when measurement range increased; The deviations that instrument allows is little, location difficulty during measurement, and the measurement of finishing a survey line is consuming time more, and stability and the measurement accuracy of instrument are influenced by environmental temperature.
Summary of the invention
Technical matters to be solved by this invention is to overcome defective of the prior art, and a kind of induction type slip micrometer is provided, and is highly sensitive, the measuring accuracy height, measurement range is big, and stability is high, does not have the machinery wearing and tearing, and the location is quick, easy to operate, be easy to carry, and can under certain hydraulic pressure, work.
For solving the problems of the technologies described above, the invention provides a kind of induction type slip micrometer, it is characterized in that, comprise
Shell,
Be located at the centre post in the described shell, be located at the two groups of telefaults that are spaced a distance on the described centre post,
Be located at the flexible connecting rod at described centre post two ends,
Be enclosed within the end of described flexible connecting rod and form the sealing socket of sealing with the two ends of described shell, wherein an end of the sealing socket of an end and a cable outlet seat is tightly connected, and the other end of described cable outlet seat is connected with an aviation socket seal,
The telemetry circuit that is connected with described telefault.
Every group of described telefault comprises the coil of two same sizes that coiling is also connected on same coil rack.
Described telefault adopts differential structural shape, and the centre of coil rack inside surface contacts with centre post.
Described sealing socket is provided with the guide roller parts.
The leading line that described guide roller parts form is parallel with survey line.
Described centre post adopts the minimum alloy material of linear expansion coefficient to make.
Described telemetry circuit comprises microprocessor, the telecommunication circuit, temperature sensor, relay, the amplifying circuit that link to each other with described microprocessor, rectification circuit, A/D change-over circuit.Telemetry circuit is located on the telemetry circuit plate.The telemetry circuit plate is located at the middle part of centre post.
Two groups of described telefaults are switched by described relay, and relay is implemented between two groups of telefaults by microprocessor control and switches.
Described microprocessor receives the order that host computer is measured by telecommunication circuit.
The environment temperature that temperature sensor measurement goes out telefault is sent to microprocessor.
Through the electric signal of the telefault of relay incision through the rectification circuit rectification, input A/D change-over circuit behind the amplifying circuit amplifying signal, data input microprocessor after the conversion of A/D change-over circuit, by microprocessor handle with computing after, draw the relative displacement value of telefault and mark, microprocessor is sent to host computer with relative displacement value and temperature value by telecommunication circuit.
Two groups of solenoid type telefaults and telemetry circuit constitute two cover inductive di lacement tra ducers.Telefault is fixed on the minimum centre post of linear expansion coefficient with a determining deviation, and the centre distance of two groups of telefaults forms the gauge length of instrument.
The beneficial effect that the present invention reaches: the invention provides a kind of induction type slip micrometer, it is highly sensitive, the measuring accuracy height, and measurement range is big, stability is high, probe and mark noncontact in the measuring process do not have the machinery wearing and tearing, and the location is quick, easy to operate, be easy to carry, can be used for the survey pipe of movable tiltmeter, can under certain hydraulic pressure, work.
Adopt telefault and the telemetry circuit of two groups of differential patterns to form high precision, highly sensitive displacement transducer, improved sensitivity, measuring accuracy and the measurement range of instrument; Adopt the telefault of two cover performance parameter unanimities, enlarged the deviations that instrument allows, effectively simplified the operating process of instrument location, improved measurement efficient; The locator meams that adopts the telefault center to overlap with the mark center further makes the effective range of instrument be doubled than single measurement range of overlapping coil; The minimum indium watt alloy material of employing linear expansion coefficient is made into the centre post of coil, has improved the stability of instrument; Adopt a centre with coil rack to be fixed on centre post, the mounting means that other position does not contact with centre post, every group of coil can freely stretch along axis direction centered by point of fixity, adopt the variate mode simultaneously, eliminate or reduced the measuring error that coil performance is produced by temperature variation, improved the stability of instrument; Be provided with Flexible Connector between centre post and sealing socket, avoided housing to be subjected to external impacts and make coil and centre post be out of shape, improved the reliability of instrument; Instrument is by realizing the measurement of displacement with the induction of mark, and instrument and mark do not have machinery wearing and tearing, stability and the serviceable life of having improved instrument in the measuring process; Adopt the structure of integral sealing, instrument can be under certain hydraulic pressure operate as normal; The instrument two ends are provided with guide roller, can easily slide in the deviational survey pipe, need not big external force and spur, and make the more convenient operation of instrument.
Description of drawings
Fig. 1 is inner structure synoptic diagram of the present invention;
Fig. 2 is the displacement measurement schematic diagram;
Fig. 3 is displacement measurement schematic diagram of the present invention;
Fig. 4 is scheme of installation of the present invention;
Fig. 5 measures the initial position synoptic diagram for the present invention;
Fig. 6 is measurement and positioning synoptic diagram of the present invention;
Fig. 7 is telemetry circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
As shown in Figure 1, a kind of induction type slip micrometer comprises shell 6, upper end sealing socket 8, lower end sealing socket 2, guide roller parts 1, cable outlet seat 9, centre post 4, telefault 5, flexible connecting rod 3, telemetry circuit plate 7.Centre post 4 is for being positioned at a stock of shell 6, termination, two ends at centre post 4 is with flexible connecting rod 3, on centre post 4, be separately installed with one group of telefault 5 near end positions, amount to two groups of telefaults 5, every group of telefault 5 is in series by two small coils of coiling on same coil rack, centre post 4 adopts the minimum alloy material of linear expansion coefficient to make, and has improved the stability of instrument.Every group of telefault 5 adopts differential structural shape, sensitivity and the measurement range of telefault 5 have been improved, only the centre with the coil rack inside surface contacts installation with centre post 4, make coil rack centered by the installation position, but to two ends free expansion or contraction, eliminate or reduced the influenced by ambient temperature and systematic error that produces of instrument, improved the stability of instrument.Measure the centre distance of two groups of telefaults as the gauge length of instrument.
The middle part of centre post 4 be provided with 7, two groups of telefaults 5 of telemetry circuit plate respectively be located at telemetry circuit plate 7 on telemetry circuit be connected.Termination, two ends at centre post 4 also is provided with flexible connecting rod 3, and flexible connecting rod 3 can be eliminated or the external force that reduces to act on the instrument end causes the influence of centre post 4 distortion, has improved the stability of instrument.Also be with upper end sealing socket 8 and lower end sealing socket 2 in the end of flexible connecting rod 3, upper end sealing socket 8, lower end sealing socket 8 are tightly connected by O type circle and shell 6.Be provided with cable outlet seat 9 at upper end sealing socket 8, cable outlet seat 9 is provided with aviation socket 10, communication, the feed cable of drawing from telemetry circuit plate 7 passes upper end sealing socket 8 and is connected to aviation socket 10 on the cable outlet seat 9, aviation socket 10 is tightly connected with cable outlet seat 9, cable outlet seat 9 adopts O type circle to be connected and sealed with upper end sealing socket 8, this structure had both realized being connected of instrument and external cable, had guaranteed that again instrument normally uses under certain water pressure resistance environment.
It is parallel with housing axis to be respectively equipped with the leading line that the angle sheave in 1, two group of guide roller parts 1 of guide roller parts forms at upper end sealing socket 8 and lower end sealing socket 2, makes the instrument can light slip in surveying pipe, is convenient to location and the measurement of instrument.
Displacement measurement principle of the present invention: be provided with two groups of telefaults in the slip micrometer, the telemetry circuit of every group of telefault on the telemetry circuit plate is combined, and forms two groups of high sensitivity, high-precision displacement transducer.Its displacement measurement principle as shown in Figure 2, when in telefault 5, importing exchange current, form current vortex in the short circuit metal sleeve 20, this current vortex certainly will cause the variation of telefault parameter to the effect of coil, and the degree of depth that the short circuit sleeve enters coil is more big, and the variation of telefault parameter is just more remarkable.By the variable quantity of inductance measuring coil 5 a certain parameters, just can record the relative displacement of the relative short circuit metal sleeve 20 of telefault.For measurement range and the sensitivity that improves instrument, with two coil series connection, form the structure of differential pattern, two telefaults are respectively loop A, coil B, as shown in Figure 3, the exchange current of input certain frequency between terminals a and terminals c, the relative displacement that records metal sleeve and coil by the variation of measuring voltage difference between terminals a and terminals b, terminals b and the terminals c.
The course of work of slip micrometer: as Fig. 4, Fig. 5, shown in Figure 6, with certain gauged distance slip micrometer of packing into, this gauged distance is the gauge length L of slip micrometer with two groups of telefaults 5
MarkTwo groups of telefaults of slip micrometer are responded to two marks 21 respectively on the measuring position, and record two marks 21 with respect to the change in location of telefault, the gauge length of binding probe again, can record the accurate spacing of adjacent two marks 21, mark 21 and tested works 22 are consolidated by mortar or binding 23, slip micrometer 100 stretches into from the outside surveys pipe 24 and slip in surveying pipe, by measuring the relative displacement of 21 of adjacent two marks successively, can determine that tested works 22 inside are along the distortion distribution situation on a certain straight line, by the measurement of many surveys line, can determine distortion or the Strain Distribution situation of whole tested works 22 inside.
The slip micrometer is measured with calculation process as follows: establish telefault and make progress for just, downwards for negative with respect to mark 21.Two telefaults are respectively loop A, coil B, and two corresponding marks are respectively mark Ac, mark Bc.
Measuring loop A is X (A) with respect to the displacement of mark Ac, and coil B is X (B) with respect to the displacement of mark Bc.Centered by the value of [x (A)+x (B)], overlap criterion, carry out the location of measuring position.When-2mm≤[x (A)+x (B)]≤2mm, think to locate and finish, can measure.When the center overlaps, x (A)+x (B)=0.Mark Ac with respect to the displacement of mark Bc is: Δ=X (A)-X (B), the distance between mark Ac and the mark Bc is L
Survey=L
Mark+ [X (A)-X (B)].
As shown in Figure 7, telemetry circuit plate 7 is provided with telemetry circuit, telemetry circuit comprises circuit such as relay 14, rectification circuit 13, amplifying circuit 12, A/D change-over circuit 11, microprocessor 17, telecommunication circuit 16, temperature sensor 15, power circuit links to each other with each circuit on the telemetry circuit plate 7 by cable, power supply is provided for each circuit and telefault 5.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (6)
1. an induction type slip micrometer is characterized in that, comprises
Shell,
Be located at the centre post in the described shell, be located at the two groups of telefaults that are spaced a distance on the described centre post,
Be located at the flexible connecting rod at described centre post two ends,
Be enclosed within the end of described flexible connecting rod and form the sealing socket of sealing with the two ends of described shell, wherein an end of the sealing socket of an end and a cable outlet seat is tightly connected, and the other end of described cable outlet seat is connected with an aviation socket seal,
The telemetry circuit that is connected with described telefault;
Every group of described telefault comprises the coil of two same sizes that coiling is also connected on same coil rack;
Every group of described telefault adopts differential structural shape, and the centre of coil rack inside surface contacts installation with centre post, make coil rack centered by the installation position, to two ends free expansion or contraction.
2. induction type slip micrometer according to claim 1 is characterized in that described sealing socket is provided with the guide roller parts.
3. induction type slip micrometer according to claim 2 is characterized in that, the leading line that described guide roller parts form is parallel with survey line.
4. induction type slip micrometer according to claim 1 is characterized in that, described centre post adopts the minimum alloy material of linear expansion coefficient to make.
5. induction type slip micrometer according to claim 1 is characterized in that described telemetry circuit comprises microprocessor, the telecommunication circuit, temperature sensor, relay, the amplifying circuit that link to each other with described microprocessor, rectification circuit, A/D change-over circuit.
6. induction type slip micrometer according to claim 5 is characterized in that, two groups of described telefaults are switched by described relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101333130A CN102297647B (en) | 2011-05-23 | 2011-05-23 | Inductive type sliding micrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101333130A CN102297647B (en) | 2011-05-23 | 2011-05-23 | Inductive type sliding micrometer |
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| CN102297647A CN102297647A (en) | 2011-12-28 |
| CN102297647B true CN102297647B (en) | 2013-07-10 |
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| CN2011101333130A Active CN102297647B (en) | 2011-05-23 | 2011-05-23 | Inductive type sliding micrometer |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809453B (en) * | 2012-08-02 | 2014-04-09 | 莫也兰 | Sensing/detecting device capable of reflecting internal force change and internal displacement of rock-soil |
| CN107121154A (en) * | 2017-05-04 | 2017-09-01 | 宁波拓普智能刹车系统有限公司 | A kind of induction displacement transducer of intelligent braking |
| CN109612380A (en) * | 2019-01-28 | 2019-04-12 | 江阴信和电力仪表有限公司 | A kind of coil redundance type eddy current displacement sensor |
| CN110208503A (en) * | 2019-05-31 | 2019-09-06 | 中国海洋石油集团有限公司 | A kind of instrument measuring cementing concrete ring microannulus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2274757Y (en) * | 1996-12-24 | 1998-02-18 | 北方交通大学 | Apparatus for measuring deformation of rails effected by temperature |
| CN2398609Y (en) * | 1999-12-16 | 2000-09-27 | 中国科学院武汉岩土力学研究所 | Sliding deforming meter dragline type test operating system |
| JP2006003117A (en) * | 2004-06-15 | 2006-01-05 | Keyence Corp | Contact type displacement sensor |
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Owner name: NANJING NARI CO., LTD. STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: NANJING NARI CO., LTD. Effective date: 20121025 |
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Effective date of registration: 20121025 Address after: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Applicant after: State Grid Electric Power Research Insititute Applicant after: Nanjing Nari Co., Ltd. Applicant after: State Grid Corporation of China Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Applicant before: State Grid Electric Power Research Insititute Applicant before: Nanjing Nari Co., Ltd. |
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Effective date of registration: 20171205 Address after: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee after: NARI Technology Development Co., Ltd. Patentee after: State Grid Electric Power Research Insititute Co-patentee after: State Grid Corporation of China Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee before: Nanjing Nari Co., Ltd. Patentee before: State Grid Electric Power Research Insititute Co-patentee before: State Grid Corporation of China |
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Address after: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee after: NARI Group Corp. Patentee after: STATE GRID WUHAN HIGH VOLTAGE Research Institute Co-patentee after: State Grid Corporation of China Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee before: NARI TECHNOLOGY Co.,Ltd. Patentee before: STATE GRID WUHAN HIGH VOLTAGE Research Institute Co-patentee before: State Grid Corporation of China |