CN202709986U - Restorable vibrating wire type surface strainmeter - Google Patents
Restorable vibrating wire type surface strainmeter Download PDFInfo
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- CN202709986U CN202709986U CN 201220163005 CN201220163005U CN202709986U CN 202709986 U CN202709986 U CN 202709986U CN 201220163005 CN201220163005 CN 201220163005 CN 201220163005 U CN201220163005 U CN 201220163005U CN 202709986 U CN202709986 U CN 202709986U
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- end block
- strain protection
- strain
- strainmeter
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Abstract
The utility model discloses a restorable vibrating wire type surface strainmeter, comprising a fixed end block 1, a steel wire 2, a strain protection tube 3, and a vibration pickup 4, wherein the steel wire 2 is arranged inside the strain protection tube 3, and one end of the strain protection tube 3 is connected with the fixed end block 1 in a manner of screw thread connection; the strainmeter also comprises a slide end block 8, the other end of the strain protection tube 3 is hermetically connected with the slide end block 8, the vibration pickup 4 is located at the center of the strain protection tube 3, the slide end block 8 comprises a cotter pin 82 and a compressed spring 83, and the compressed spring 83 is located between the strain protection tube 3 and the cotter pin 82. The restorable vibrating wire type surface strainmeter is simple in design, easy in implementation and low in cost, is provided with a stop pin for preventing torsion and the compressed spring for providing a restoring force, thereby effectively avoiding damage when the strainmeter is disturbed or falls off in the process of daily storage, transportation and mounting, ensuring the long-term stability and prolonging the service life.
Description
Technical field
The utility model relates to the civil engineering work field of test instrument, relates in particular to a kind of renewable type type vibration wire surface strain meter.
Background technology
Vibrating string extensometer is to utilize the variation relation of the pulling force of string vibration frequency and string to come the strain of monitor strain meter loca, and the string wire of strainometer has certain initial tensile force T
0, thereby have original frequency f
0, when pressure is born at the pulling force two ends of strainometer string, then the tension force of string reduces, and this moment, the natural frequency of vibration of string also reduced.Vibrating string extensometer is widely used in mine, ground, railway, construction work and the Other Engineering application, work under bad environment, and construction is disturbed large, and is strict to vibrating string extensometer.
In patent CN 201819658 U, a kind of wireless vibratory strain ga(u)ge is disclosed, comprise and measure and read two parts, measure portion comprises sensitive element, vibro-pickup is arranged on the sensitive element, be provided with inductive coil, scrambler and emitter in the vibro-pickup, reading section comprises that data read or display device, data read or display device in be provided with receiving trap.This string shakes the formula strainometer to the structure of vibratory string tension force neither one compensating and restoring and prevents the structure that string wire reverses, sensor transportation, deposit and installation process in be subject to large disturbance and the people reverses the stability that is easy to reduce vibrating string type sensor, even cause vibrating string type sensor to lose efficacy.
In the domestic similar product with the identification chip, the identification chip is positioned between the external four-core shielding line, adopts this structure need to consider waterproof sealing, complex structure at present.
The utility model content
1, the purpose of this utility model.
The purpose of this utility model is to provide a kind of renewable type type vibration wire surface strain meter that can the disturbance rejection auto-compensation recovers and prevent the string wire twisting, and the change of the mounting structure by the identification chip, can play the effect of simplified structure.
2, the technical scheme of taking of the present utility model.
A kind of renewable type type vibration wire surface strain meter comprises that fixedly end block 1, string wire 2, strain protection tube 3, vibro-pickup 4 and slip end block 8 consist of.Described string wire 2 places strain protection tube 3 inside, described strain protection tube 3 one ends with one fixedly end block 1 be threaded, strain protection tube 3 other ends and slip end block 8 are tightly connected, vibro-pickup 4 is positioned in the middle of the strain protection tube 3.
Described vibro-pickup 4 comprises identification chip 4 and coil 5, and described identification chip 4 and coil 5 place respectively the both sides of vibro-pickup 7, and embedding is in vibro-pickup 7 shells; Establish draw-in groove in the vibro-pickup 4 identification chip 4 is installed, coil 5 links to each other with the identification chip, and identification chip 4 is drawn four-core shielding line 6 and is connected with outside Acquisition Instrument, and described coil (5) adopts single coil structure.
Describedly comprise surperficial mounting hole 81, split pin 82, stage clip 83, spacer pin 84 and two O RunddichtringO 85 by slip end block 8, stage clip 83 is positioned in the middle of strain protection tube 3 and the split pin 82, the restoring force that spring produces and the tensile force opposite direction of vibratory string, when described surface strain meter remains static (fundamental frequency position), the spring restoring force just in time with the tensile force balance of vibratory string, described slip end block 8 links to each other with strain protection tube 3 by spacer pin 84, the restriction string wire by the people for reversing, improve strainometer serviceable life, strengthen the strainometer long-time stability; Described slip end block 8 is sealed by two O RunddichtringOs 85 with strain protection tube 3 junctions, and renewable type type vibration wire surface strain meter is welded in the testee surface by surperficial mounting hole 7 anchorings or point.
3, the useful effect of the utility model.
(1) setting by stage clip, the stage clip restoring force gives string wire a compensating action, daily deposit and transportation and installation process in run into large disturbance or fall, described renewable type type vibration wire surface strain meter can return to the fundamental frequency position certainly, can guarantee long-time stability, effectively avoid strainometer to lose efficacy.
(2) setting by spacer pin prevents that string wire from being to reverse the inefficacy that causes by the people, further improves described surface strain meter life-span and long-time stability
(3) because string wire is sensitive element, and vibro-pickup employing separation design, adopt the mode that is easy to clamping, make its easy accessibility.
(4) the identification chip is positioned in the vibro-pickup, does not need the identification chip is positioned between the two joint four-core shielding lines, make its structure further simple, and need not consider four-core shielding line joint waterproof sealing problem.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model slip end block synoptic diagram
Embodiment
Embodiment
Further specify the utility model below in conjunction with accompanying drawing.
Shown in Figure 1, the string wire two ends are separately fixed at fixedly on the end block 1 and slip end block 8 by split pin 82, and strain protection tube 3 protection string wires 2 are avoided external interference.Fixedly end block 1 is threaded connection with strain protection tube 3; Slip end block 8 is connected by two O type circle 12 slipper seals with strain protection tube 3, and described renewable type type vibration wire surface strain meter can be followed testee corresponding tensioning or lax is occured.
Described renewable type type vibration wire surface strain meter center section is a detachable vibro- pickup 7,5 pairs of string wires of coil of placing by inside carry out exciting and pick-up, vibro-pickup is provided with draw-in groove simultaneously, embedded identification chip 4, thermistor and identification chip 4 are placed on the pcb board, sensor characteristic parameter, environment, the data of surveying can be stored in the chip, convenience is transferred at any time, data query.
Shown in Figure 2, described fixedly end block inside offers balancing force of string wire by a stage clip 83, so that renewable type type vibration wire surface strain meter can return to the fundamental frequency position certainly after being disturbed, has effectively avoided losing efficacy because of disturbance.Simultaneously, by spacer pin 84 prevent string wire by the people for reversing.
Described renewable type type vibration wire surface strain meter is by surperficial mounting hole 81, and anchoring or point are welded in the measured object surface, and testee can be the versions such as steel construction, xoncrete structure.When testee deformed, respective change also occured in surface strain meter fixedly end block 1 and 8 displacements of slip end block, string wire 2 tensions or lax.Acquisition Instrument is given 5 one pulse voltages of coil by four-core shielding line 6, exciting string wire 2, and pass through coil 5 pick-ups, thus record the frequency values of current surface strain meter, indirectly measure the strain value of testee.Measured data, sensor characteristic parameter and environment all is stored in the identification chip simultaneously, can transfer at any time and data query.
Above-described embodiment limits the utility model never in any form, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops in the protection domain of the present utility model.
Claims (5)
1. renewable type type vibration wire surface strain meter, comprise that fixedly end block (1), string wire (2), strain protection tube (3), vibro-pickup (4) consist of, described string wire (2) places strain protection tube (3) inside, described strain protection tube (3) one ends are threaded with fixing end block (1), it is characterized in that: also comprise slip end block (8), strain protection tube (3) other end and slip end block (8) are tightly connected, and vibro-pickup (4) is positioned in the middle of the strain protection tube (3); Described slip end block (8) comprises split pin (82) and stage clip (83), and stage clip (83) is positioned in the middle of strain protection tube (3) and the split pin (82).
2. strainometer as claimed in claim 1; it is characterized in that: describedly also comprise two O RunddichtringOs (85) by slip end block (8), described slip end block (8) is sealed by two O RunddichtringOs (85) with strain protection tube (3) junction.
3. strainometer as claimed in claim 1 is characterized in that: describedly also comprise spacer pin (84) by slip end block (8), described slip end block (8) links to each other with strain protection tube (3) by spacer pin (84).
4. strainometer as claimed in claim 1, it is characterized in that: described vibro-pickup (4) comprises identification chip (4) and coil (5), described identification chip (4) and coil (5) place respectively the both sides of vibro-pickup (7), coil (5) links to each other with identification chip (4), and identification chip (4) is drawn four-core shielding line (6) and is connected with outside Acquisition Instrument.
5. strainometer as claimed in claim 4 is characterized in that: described coil (5) employing single coil structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220163005 CN202709986U (en) | 2012-04-18 | 2012-04-18 | Restorable vibrating wire type surface strainmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220163005 CN202709986U (en) | 2012-04-18 | 2012-04-18 | Restorable vibrating wire type surface strainmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202709986U true CN202709986U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220163005 Expired - Fee Related CN202709986U (en) | 2012-04-18 | 2012-04-18 | Restorable vibrating wire type surface strainmeter |
Country Status (1)
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| CN (1) | CN202709986U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784209A (en) * | 2016-01-27 | 2016-07-20 | 王建美 | Vibrating string sensor |
| CN105986806A (en) * | 2015-02-11 | 2016-10-05 | 中国石油化工股份有限公司 | Special vibration string type load sensor for oil sucking machine |
| CN106289122A (en) * | 2016-09-14 | 2017-01-04 | 广西交通科学研究院 | Fracture width change monitoring device based on string vibration frequency |
| CN107014326A (en) * | 2017-05-15 | 2017-08-04 | 基康仪器股份有限公司 | A kind of small-sized strain gauge of type vibration wire |
| CN108507508A (en) * | 2018-06-15 | 2018-09-07 | 佛山科学技术学院 | A kind of strain gauge of limitation torsion angle |
| CN108759701A (en) * | 2018-05-02 | 2018-11-06 | 中交第二航务工程局有限公司 | Optical fiber vibratory string combines and the adjustable surface-mount type sensor of initial value |
| CN110332914A (en) * | 2019-07-29 | 2019-10-15 | 基康仪器股份有限公司 | A kind of type vibration wire water pressure resistance strain gauge |
-
2012
- 2012-04-18 CN CN 201220163005 patent/CN202709986U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986806A (en) * | 2015-02-11 | 2016-10-05 | 中国石油化工股份有限公司 | Special vibration string type load sensor for oil sucking machine |
| CN105784209A (en) * | 2016-01-27 | 2016-07-20 | 王建美 | Vibrating string sensor |
| CN105784209B (en) * | 2016-01-27 | 2019-01-29 | 王建美 | A kind of vibrating string type sensor |
| CN106289122A (en) * | 2016-09-14 | 2017-01-04 | 广西交通科学研究院 | Fracture width change monitoring device based on string vibration frequency |
| CN107014326A (en) * | 2017-05-15 | 2017-08-04 | 基康仪器股份有限公司 | A kind of small-sized strain gauge of type vibration wire |
| CN107014326B (en) * | 2017-05-15 | 2024-04-26 | 基康仪器股份有限公司 | Vibrating wire type small strain gauge |
| CN108759701A (en) * | 2018-05-02 | 2018-11-06 | 中交第二航务工程局有限公司 | Optical fiber vibratory string combines and the adjustable surface-mount type sensor of initial value |
| CN108507508A (en) * | 2018-06-15 | 2018-09-07 | 佛山科学技术学院 | A kind of strain gauge of limitation torsion angle |
| CN110332914A (en) * | 2019-07-29 | 2019-10-15 | 基康仪器股份有限公司 | A kind of type vibration wire water pressure resistance strain gauge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20180418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |