CN105784209B - A kind of vibrating string type sensor - Google Patents
A kind of vibrating string type sensor Download PDFInfo
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- CN105784209B CN105784209B CN201610054854.7A CN201610054854A CN105784209B CN 105784209 B CN105784209 B CN 105784209B CN 201610054854 A CN201610054854 A CN 201610054854A CN 105784209 B CN105784209 B CN 105784209B
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- axle sleeve
- string wire
- screw thread
- string
- cone tooth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission Devices (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of vibrating string type sensors, including axle sleeve and the string wire being placed in axle sleeve, the both ends of string wire are fixed in axle sleeve, it further include the pressing piece for being arranged in axle sleeve and being pressed on string wire, the pressing piece can axially move to keep the contact point of pressing piece and string wire adjustable in axle sleeve.Pressing piece is pressed on string wire, pressing piece can axially move, the contacting points position of pressing piece and string wire can be adjusted by mobile pressing piece, realization is adjusted the vibration frequency of string wire, the change curve of the vibration frequency, vibration frequency that make string wire is unanimous on the whole, and practical in use, the vibration frequency that each vibrating string type sensor measures can uniformly correspond to a value of thrust, it does not need to achieve the frequency of string wire, it is very easy to use.
Description
Technical field
The present invention relates to a kind of vibrating string type sensors, more particularly to a kind of for detecting the type vibration wire of reinforcing steel bar bear situation
Reinforcing bar sensor.
Background technique
It in the construction of architectural engineering test pile, needs for vibrating string type sensor to be mounted on reinforcing bar, is used for periodic detection
The stress condition of reinforcing bar in concrete column.Vibrating string type sensor include axle sleeve, in axle sleeve and axially disposed string wire, with
And test component, the mounting means of existing string wire, it is to lead to each vibratory string directly by string wire locking on axle sleeve using bolt
Tightness, stress condition and the position of string wire on formula sensor more or less can all have a certain difference, this just makes
In the case where zero load or being same load stress condition, the vibration frequency come detected by each vibrating string type sensor is not
It is identical, even if all detecting identical vibration frequency, the stress of reinforcing bar corresponding to each vibrating string type sensor also not phase
Together.That is, existing vibrating string type sensor, the vibration of the vibration frequency, string wire of the string wire of each vibrating string type sensor
The change curve of frequency is all different, therefore, in actual use, to vibration frequency of each vibrating string type sensor in zero load
Rate, the vibration frequency in maximum weighted will record archive, to be compared and analyzed in periodic detection in future, one
Denier loss of data just can not calculate the actual loading of reinforcing bar, use very inconvenient.
Summary of the invention
The present invention provides a kind of vibrating string type sensors, and which overcome the deficiencies present in background technique.The present invention solves
Technical solution used by its technical problem is:
A kind of vibrating string type sensor, including axle sleeve and the string wire being placed in axle sleeve, the both ends of string wire are fixed in axle sleeve, also
Including being arranged in axle sleeve and being pressed in the pressing piece on string wire, the pressing piece can axially move to make to press in axle sleeve
The contact point of part and string wire is adjustable.
Among one preferred embodiment: further including being arranged in axle sleeve and applying the elasticity that elastic force tenses string wire to string wire
The tightness of part, the elastic component is adjustable.
Among one preferred embodiment: further including the rotor being arranged in axle sleeve, the middle part of rotor is equipped with to be passed through for string wire
Axially extending bore is additionally provided with radial hole on rotor, and the pressing piece is rod-like structure and is mounted in radial hole, and rotation rotor can make
Rotor is axially moveable.
Among one preferred embodiment: further including the threaded sleeve being arranged in axle sleeve, rotor is arranged in threaded sleeve, turns
Son is threadedly coupled with threaded sleeve.
Among one preferred embodiment: rotor is plastic part, and the screw thread on rotor outer periphery face includes spaced leading portion spiral shell
The screw thread of line and back segment screw thread, leading portion screw thread and back segment screw thread and threaded sleeve is interference fitted in the axial direction.
Among one preferred embodiment: further including two and be symmetricly set on the cone tooth for being respectively used to fixed string wire both ends in axle sleeve
Clamp head, cone tooth clamp centriciput are equipped with the pin hole passed through for string wire, and the end face of cone tooth clamp head microcephaly one end is equipped with multiple
Cutting groove is to form multiple clamping jaws in the end of cone tooth clamp head, and cone tooth clamp head is equipped with nut, and tightening nut can make to press from both sides
Pawl is tightened and holds string wire tightly.
Among one preferred embodiment: further including two glands, gland is threaded in axle sleeve, and two glands are respectively by two
A cone tooth clamp head pushes down limit in axle sleeve；Gland is metalwork, is equipped with annular groove in the middle part of gland outer peripheral surface, gland is at it
Cut setting at least two recessing grooves radially to make the middle part of gland form serpentine configuration, gland leading portion in annular groove position
The screw thread of screw thread and back segment screw thread and axle sleeve is interference fitted in the axial direction.
Among one preferred embodiment: further including two glands, gland is threaded in axle sleeve, and two glands are respectively by two
A cone tooth clamp head pushes down limit in axle sleeve；It further include elastic component, the pressing piece is set close to one of cone tooth clamp head
It sets, the elastic component, which applies elastic force to another cone tooth clamp head, makes another cone tooth clamp head be adjacent to gland.
Among one preferred embodiment: further including screw shell and plug, the middle part of plug is equipped with the resigning passed through for string wire
Hole, screw shell are arranged in axle sleeve, and plug is arranged in screw shell, and plug is threadedly coupled with screw shell, elastic component
It is supported between plug and cone tooth clamp head.
Among one preferred embodiment: the center of the end face of cone tooth clamp head major part one end is equipped with container, sets in container
Have and return middle part, described to return middle part include four baffles set gradually along axial direction, and four baffles surround a square hole, and string wire is worn
Square hole is crossed, four baffles respectively limit string wire from four direction up and down.
The technical program compared with the background art, it has the following advantages:
1. pressing piece is pressed on string wire, pressing piece be can axially move, and can adjust pressing piece by mobile pressing piece
With the contacting points position of string wire, realization is adjusted the vibration frequency of string wire, makes the change of the vibration frequency, vibration frequency of string wire
It is unanimous on the whole to change curve, practical in use, the vibration frequency that each vibrating string type sensor measures can be corresponded to uniformly
One value of thrust does not need to achieve the frequency of string wire, very easy to use.
2. elastic component, which applies elastic force to string wire, tenses string wire, the tightness of elastic component is adjustable, realizes to string wire
Vibration frequency is adjusted.
3. rotor is rotatably arranged in axle sleeve, pressing piece is mounted on the radial hole of rotor, and structure is simple.In particular,
The screw thread of rotor leading portion screw thread and back segment screw thread and threaded sleeve is interference fitted in the axial direction, guarantees that rotor is securely fixed in axis
In set, rotor-position does not allow malleable, and the performance of sensor is more stable.
4. boring tooth clamp head is equipped with nut, tightening nut can be such that clamping jaw tightens and hold string wire tightly, on the one hand can be secured
String wire is fixed on ground, on the other hand string wire can preferably be made to be on the center line of axle sleeve.
5. forming serpentine configuration in the middle part of gland to have certain elastic deformability, gland leading portion screw thread and back segment spiral shell
The screw thread of line and axle sleeve is interference fitted in the axial direction, guarantees that gland is securely fixed in axle sleeve, and malleable is not allowed in gland position,
The performance of sensor is more stable.
Cone tooth clamp head is set to be adjacent to gland 6. the elastic component applies elastic force to cone tooth clamp head, thus gland and elasticity
Part clamps cone tooth clamp head, tightens gland compressible elastomeric part, to reduce the pulling force of string wire itself, it is releasable to unclamp gland
Elastic component is realized and is adjusted to the pulling force of string wire to increase the pulling force of string wire itself, and adjustment string wire vibration frequency is finally reached
Purpose.
7. string wire, which passes through, returns middle part, four baffles respectively limit string wire from four direction up and down, guarantee steel
String is placed exactly in the center of cone tooth clamp head, is in string wire on the center line of axle sleeve, improves the concentricity of string wire.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 depicts the schematic cross-sectional view of vibrating string type sensor of the present invention.
Fig. 2 depicts the schematic top plan view of the rotor of vibrating string type sensor shown in Fig. 1.
Fig. 3 depicts the schematic cross-sectional view of rotor shown in Fig. 2.
Fig. 4 depicts the rotor of vibrating string type sensor shown in Fig. 1 and the connection schematic diagram of threaded sleeve.
Fig. 5 depicts the schematic diagram of the gland of vibrating string type sensor shown in Fig. 1.
Fig. 6 depicts the schematic cross-sectional view of the cone tooth clamp head of vibrating string type sensor shown in Fig. 1.
Fig. 7 depicts the schematic top plan view of cone tooth clamp head shown in Fig. 6.
Fig. 8 depicts the schematic diagram for returning middle part of vibrating string type sensor shown in Fig. 1.
Fig. 9 depicts the schematic cross-sectional view in first baffle position for returning middle part shown in Fig. 8.
Figure 10 depicts the schematic cross-sectional view in second baffle position for returning middle part shown in Fig. 8.
Figure 11 depicts the schematic cross-sectional view in third baffle position for returning middle part shown in Fig. 8.
Figure 12 depicts the schematic cross-sectional view in fourth gear Board position for returning middle part shown in Fig. 8.
Specific embodiment
Please refer to Fig. 1, a kind of vibrating string type sensor of the invention, including axle sleeve 10 and the string wire being placed in axle sleeve 20, steel
The both ends of string 20 are fixed in axle sleeve 10, further include the pressing piece 30 for being arranged in axle sleeve 10 and being pressed on string wire 20, described to press
Casting die 30 can axially move to keep the contact point of pressing piece 30 and string wire 20 adjustable in axle sleeve 10.Pressing piece 30 is pinned
The different location of string wire 20, thus it is possible to vary stress, shape and the draw ratio of string wire 20 adjust the vibration frequency of string wire 20
It is whole, it therefore, can make vibrating string type sensor in the state of identical pulling force, the vibration frequency of string wire 20 is adjusted to a fixation
Value.
It further include being arranged in axle sleeve 10 and the elastic component 80 that elastic force tenses string wire, the elastic component being applied to string wire 20
80 tightness is adjustable, keeps the vibration frequency of string wire 20 adjustable.The preferred spring of elastic component 80.
Fig. 1 to Fig. 4 is please referred to, vibrating string type sensor further includes the rotor 40 being arranged in axle sleeve 10, the middle part of rotor 40
Equipped with the axially extending bore 42 passed through for string wire 20, radial hole 44 is additionally provided on rotor 40, axially extending bore 42 and radial hole 44 communicate,
The pressing piece 30 is rod-like structure and is mounted in radial hole 44 that rotor 40 is threaded in axle sleeve, and rotation rotor 40 can
It is axially moveable rotor 40.It preferably, further include the threaded sleeve 50 being arranged in axle sleeve, rotor 40 is arranged in threaded sleeve
In 50, rotor 40 is threadedly coupled with threaded sleeve 50, and rotation rotor 40 can be such that rotor 40 moves in threaded sleeve 50.It is preferred that
Ground, rotor 40 are plastic parts, and the screw thread on 40 outer peripheral surface of rotor includes spaced leading portion screw thread 45 and back segment screw thread 47, preceding
Section screw thread 45 and back segment screw thread 47 and the screw thread of threaded sleeve 50 are interference fitted in the axial direction.
Fig. 1, Fig. 6 and Fig. 7 are please referred to, the both ends of string wire 20 are fixed in axle sleeve 10 by two cone tooth clamp heads 60
, specifically: two cone tooth clamp heads 60 are symmetricly set on the both ends that string wire 20 is located in axle sleeve 10, bore tooth clamp head
60 middle parts are equipped with the pin hole 62 passed through for string wire, and cone 60 microcephaly one end of tooth clamp head is outwardly and the end face of microcephaly one end is equipped with
To form four clamping jaws 64 in the end of cone tooth clamp head, cone tooth clamp head is equipped with nut 66, tightens cross cutting groove
Nut 66 can be such that clamping jaw 64 tightens and hold string wire 20 tightly.
Fig. 1 and Fig. 5 are please referred to, further includes two glands 70, gland 70 is threaded in axle sleeve 10, and two glands 70 divide
Two cone tooth clamp heads 60 limit is not pushed down into axle sleeve 10.Gland 70 is metalwork, is equipped with ring in the middle part of 70 outer peripheral surface of gland
Connected in star 72, gland 70 cut setting at least two recessing grooves 74 radially at its annular groove position to make the middle part of gland
Serpentine configuration is formed, the screw thread on gland outer peripheral surface is divided into leading portion screw thread 71 and rear end screw thread 73 by annular groove 72, before gland
Section screw thread 71 and back segment screw thread 73 and the screw thread of axle sleeve 10 are interference fitted in the axial direction.Tooth clamp head 60 is bored it is of course also possible to allow
Directly it is spirally connected with axle sleeve 10.
It please refers to Fig. 1, Fig. 8 and is so small to have only 0.2mm since the diameter of string wire 20 is very small to Figure 12, is subject to processing technology
Limitation, bore tooth clamp head 60 on 62 size of pin hole it is still larger, be unfavorable for for string wire 20 being fixed in axle sleeve 10 in this way
On heart line.20 positional shift of string wire in order to prevent, the present invention are equipped at the center of the end face of cone 60 major part one end of tooth clamp head and receive
Tank 68 is equipped in container 68 and returns middle part 61, it is described return middle part 61 include four baffles 611 set gradually along axial direction,
612,613,614, four baffles 611,612,613,614 surround a square hole 63, and string wire 20 passes through square hole 63, and four
Baffle 611,612,613,614 respectively limits string wire 20 from four direction up and down, and string wire 20 has been effectively ensured
With the concentricity of axle sleeve 10.
Please refer to Fig. 1, the pressing piece 30 is arranged close to one of cone tooth clamp head 60, and the elastic component 80 is to another
One cone tooth clamp head 60 applies elastic force, and cone tooth clamp head 60 is clamped between gland 70 and elastic component 80, and string wire 20 is drawn
Tightly.When rotary gland 70 makes to bore tooth clamp head 60 to when movement in the middle part of sensor, cone 60 compression elastic piece 80 of tooth clamp head can
Unclamp string wire 20；When rotary gland 70 makes to bore tooth clamp head 60 to when movement on the outside of sensor, elastic component 80 is released, string wire
20 are tensioned.The tightness of string wire 20 is adjusted using elastic component 80, the vibration frequency of string wire 20 can equally be adjusted
It is whole.
Preferably: further including screw shell 92 and plug 94, screw shell 92 is arranged in axle sleeve 10, and the setting of plug 94 exists
In screw shell 92, plug 94 is threadedly coupled with screw shell 92.The middle part of plug 94 is equipped with the relief hole passed through for string wire 20
942, elastic component 80 is housed in screw shell 92 and is supported between plug 94 and cone tooth clamp head 60.Screw shell 92 and cone
60 end of tooth clamp head is equipped with flange, and a guide post 96 is right axially across the flange for boring tooth clamp head 60 and screw shell 92
The movement of cone tooth clamp head 60 is oriented to, while having the function of rotation stop.In fact, the structure and screw thread of screw shell 92
The structure of casing 50 is identical, and the structure of plug 94 is identical as the structure of rotor 40, and plug 94 and screw shell 92 are along axial thread
Interference fit.
Please refer to Fig. 1, be additionally provided with sealing mechanism in the outside of gland 70 in axle sleeve 10, sealing mechanism include supporting element 01,
Sealing ring 02 is pressed on supporting element 01 by sealing ring 02 and seal screw cap 03, seal screw cap 03, seal screw cap 03 and 10 spiral shell of axle sleeve
Line connects, and corresponding sleeve lining is smooth surface texture on sealing ring 02.
The end of two reinforcing bars 05 is inserted into the both ends of axle sleeve 10 respectively and is threadedly coupled with axle sleeve 10.In production, it can press
State step adjustment string wire vibration frequency:
1) in the case where reinforcing bar 05 (pull rod replacement also can be used in reinforcing bar) does not stress, gland 70 and/or plug are adjusted
94 compressions or release elastic component 80, make the vibration frequency of string wire 20 reach basic value；
2) a specified maximum pull is applied to reinforcing bar 05, adjusts the position of pressing piece 30, makes the vibration frequency of string wire 20
Reach predetermined value；
3) repeat step 1) and 2), in the case that reinforcing bar 05 does not stress the vibration frequency of string wire 20 close to basic value,
Also, reinforcing bar 05 by specified maximum pull in the case where string wire 20 vibration frequency close to predetermined value.
The above is only the preferred embodiment of the present invention, the range implemented of the present invention that therefore, it cannot be limited according to, i.e., according to
Equivalent changes and modifications made by the invention patent range and description, should still be within the scope of the present invention.
Claims (8)
1. a kind of vibrating string type sensor, including axle sleeve and the string wire being placed in axle sleeve, the both ends of string wire are fixed in axle sleeve, special
Sign is: further including the pressing piece for being arranged in axle sleeve and being pressed on string wire, the pressing piece can axially move in axle sleeve
To keep the contact point of pressing piece and string wire adjustable；Further include two to be symmetricly set in axle sleeve and be respectively used to fixed string wire two
The cone tooth clamp head at end, cone tooth clamp centriciput are equipped with the pin hole passed through for string wire, further include two glands, and gland is threadedly coupled
In axle sleeve, two cone tooth clamp heads are pushed down limit in axle sleeve respectively by two glands；It further include that setting is in axle sleeve and right
String wire applies the elastic component that elastic force tenses string wire, and the pressing piece is close to one of cone tooth clamp head setting, the elasticity
Part, which applies elastic force to another cone tooth clamp head, makes another cone tooth clamp head be adjacent to gland；
It further include the rotor being arranged in axle sleeve, the middle part of rotor is equipped with the axially extending bore passed through for string wire, is additionally provided on rotor
Radial hole, the pressing piece are rod-like structures and are mounted in radial hole that rotation rotor can be such that rotor is axially moveable.
2. a kind of vibrating string type sensor according to claim 1, it is characterised in that: the tightness of the elastic component is adjustable
It is whole.
3. a kind of vibrating string type sensor according to claim 1, it is characterised in that: further include the screw thread being arranged in axle sleeve
Casing, rotor are arranged in threaded sleeve, and rotor is threadedly coupled with threaded sleeve.
4. a kind of vibrating string type sensor according to claim 3, it is characterised in that: rotor is plastic part, rotor outer periphery face
On screw thread include spaced leading portion screw thread and back segment screw thread, the screw thread of leading portion screw thread and back segment screw thread and threaded sleeve exists
It is interference fitted in axial direction.
5. a kind of vibrating string type sensor according to claim 1, it is characterised in that: the end face of cone tooth clamp head microcephaly one end
Multiple cutting grooves are equipped with to form multiple clamping jaws in the end of cone tooth clamp head, cone tooth clamp head is equipped with nut, tightens
Nut can be such that clamping jaw tightens and hold string wire tightly.
6. a kind of vibrating string type sensor according to claim 5, it is characterised in that: further include two glands, gland screw thread
It is connected in axle sleeve, two cone tooth clamp heads are pushed down limit in axle sleeve respectively by two glands；Gland is metalwork, outside gland
All Middle faces are equipped with annular groove, and the screw thread on gland outer peripheral surface is divided into leading portion screw thread and rear end screw thread, gland by annular groove
Cut setting at least two recessing grooves radially at its annular groove position to make the middle part of gland form serpentine configuration, gland
The screw thread of leading portion screw thread and back segment screw thread and axle sleeve is interference fitted in the axial direction.
7. a kind of vibrating string type sensor according to claim 1, it is characterised in that: further include screw shell and plug, plug
The middle part of son is equipped with the relief hole passed through for string wire, and screw shell is arranged in axle sleeve, and plug is arranged in screw shell, plug
Son is threadedly coupled with screw shell, and elastic component is supported between plug and cone tooth clamp head.
8. a kind of vibrating string type sensor according to claim 5, it is characterised in that: the end face of cone tooth clamp head major part one end
Center be equipped with container, be equipped in container and return middle part, it is described that return middle part include four baffles set gradually along axial direction, four
A baffle surrounds a square hole, and string wire passes through square hole, and four baffles respectively carry out string wire from four direction up and down
Limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054854.7A CN105784209B (en) | 2016-01-27 | 2016-01-27 | A kind of vibrating string type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610054854.7A CN105784209B (en) | 2016-01-27 | 2016-01-27 | A kind of vibrating string type sensor |
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| CN105784209A CN105784209A (en) | 2016-07-20 |
| CN105784209B true CN105784209B (en) | 2019-01-29 |
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| CN201610054854.7A Active CN105784209B (en) | 2016-01-27 | 2016-01-27 | A kind of vibrating string type sensor |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168739B (en) * | 2017-11-30 | 2019-12-13 | 中冶建筑研究总院有限公司 | mounting tool and mounting method of vibrating wire type sensor |
| CN112945425B (en) * | 2021-01-20 | 2023-07-11 | 南京工程学院 | Intelligent vibrating wire type sensor and application method thereof |
| CN113091883B (en) * | 2021-04-02 | 2022-05-27 | 厦门邦创信息技术有限公司 | Tension keeping structure, tension keeping device and vibrating wire type equipment |
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| CN102419150A (en) * | 2011-09-01 | 2012-04-18 | 泰安科大洛赛尔传感技术有限公司 | Vibrating string type displacement sensor and working method thereof |
| CN202709986U (en) * | 2012-04-18 | 2013-01-30 | 苏州筑邦测控科技有限公司 | Restorable vibrating wire type surface strainmeter |
| CN103868582A (en) * | 2014-03-14 | 2014-06-18 | 昆明理工大学 | Optical fiber Bragg grating-based vibrating wire infrasonic wave sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4277973A (en) * | 1978-12-04 | 1981-07-14 | Ivor Hawkes | Vibratory wire strain gage |
| CN2510852Y (en) * | 2001-11-16 | 2002-09-11 | 长沙金码高科技实业有限公司 | Surface-sticked intelligent digital vibration wire strain gauge |
| CN101561239B (en) * | 2009-05-25 | 2011-05-25 | 重庆交通大学 | Vibrating wire strain gauge with controllable truss wire |
| CN203629533U (en) * | 2013-11-15 | 2014-06-04 | 哈尔滨工业大学深圳研究生院 | Device for adjusting initial installation value of vibratory string type strain gauge |
| CN105181214A (en) * | 2015-05-26 | 2015-12-23 | 苏州华徕光电仪器有限公司 | Vibrating wire pressure sensor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419150A (en) * | 2011-09-01 | 2012-04-18 | 泰安科大洛赛尔传感技术有限公司 | Vibrating string type displacement sensor and working method thereof |
| CN202709986U (en) * | 2012-04-18 | 2013-01-30 | 苏州筑邦测控科技有限公司 | Restorable vibrating wire type surface strainmeter |
| CN103868582A (en) * | 2014-03-14 | 2014-06-18 | 昆明理工大学 | Optical fiber Bragg grating-based vibrating wire infrasonic wave sensor |
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| CN105784209A (en) | 2016-07-20 |
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