CN202471653U - Anchoring quality detection sensor for anchor cable - Google Patents
Anchoring quality detection sensor for anchor cable Download PDFInfo
- Publication number
- CN202471653U CN202471653U CN 201220048609 CN201220048609U CN202471653U CN 202471653 U CN202471653 U CN 202471653U CN 201220048609 CN201220048609 CN 201220048609 CN 201220048609 U CN201220048609 U CN 201220048609U CN 202471653 U CN202471653 U CN 202471653U
- Authority
- CN
- China
- Prior art keywords
- base
- anchor cable
- quality detection
- detection sensor
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses an anchoring quality detection sensor for an anchor cable. The anchoring quality detection sensor comprises a base, a shell and a cover, wherein the shell is arranged on the base. The anchoring quality detection sensor is characterized in that the base is hollow, the anchor cable passes through the base, the base is fixed on the anchor cable by a fastening bolt, a mass block, an electrode sheet and a piezoelectric ceramic sheet are tightly pressed on the base through pressing nuts, a sound-absorption adhesive is filled in the shell, and the cover is used for sealing a piezoelectric ceramic sheet guiding line and cable, and an electrode sheet guiding line and cable. The sound-absorption adhesive is filled in the shell and the cover seals the sound-absorption adhesive. The anchoring quality detection sensor disclosed by the utility model has the characteristics of strong detected anchor cable sound wave signals and short after shock, and effectively solves problems that an anchoring quality detection signal of the anchor cable is weak and the energy of an interference signal of the anchor cable is large.
Description
Technical field
The utility model relates to a kind of sensor, particularly relates to a kind of special-purpose anchorage cable anchoring quality detection sensor.
Background technology
Adopt the anchorage cable anchoring technology in the Geotechnical Engineering; Can give full play to and improve self intensity and self-stable ability of rock soil mass; Effectively dwindle the works volume and alleviate the works deadweight; Significantly practice thrift construction material, help construction safety, become and improved Geotechnical Engineering stability and solve one of complicated geotechnical engineering problems most economical and effective method.At present, the anchor cable that is widely used in tunnel, side slope, the massif reinforcing engineerings such as mine, traffic, water conservancy and hydropower, geology comes in every shape, and its construction technology and anchor cable length differ bigger.Tunnel in mine, the transportation industry, tunnel anchor cable/rod length are shorter, be generally about 30m, and the anchor cable that hydroelectric project side slope, large-scale cavern (like underground power house) adopt are longer.Therefore, for guaranteeing the engineering long-term safety, to Hydraulic and Hydro-Power Engineering anchor cable characteristics, it is very necessary carrying out the applied research of anchorage cable anchoring quality elastic wave Dynamic Non-Destruction Measurement.
At present, anchoring quality detects the evaluation main method has two kinds: a kind of method is a pull-out test, and another kind of method is the elastic wave detection technique.Pull-out test belongs to test of static(al) method and destructive the detection, and sense cycle is long, and testing cost is high, and especially test findings can not reflect the controlled parameter of anchoring quality, like anchoring body length, slip casting packing etc., and the requirement of incompatibility engineering detecting development; For overcoming the defective of static(al) method test, quick, harmless elastic wave detection technique is used widely in anchor rod anchored quality testing.The receiving sensor position,
Anchor rod anchored quality elastic wave reflex method Dynamic Non-Destruction Measurement is to excite acoustical signal through the flexible transducer of ultra magnetic at the anchor pole exposed junction, and the observed pattern that is fixed on the piezoelectric sensor reception reflection wave on anchor pole top detects and estimate the anchoring quality of anchor pole.This detection technique is applicable to that rock-bolt length is limited.But along with hugeization of engineering and rapid, require to grow up apart from anchoring, the anchorage cable anchoring technology has obtained corresponding development and application; The anchor cable length that the anchorage cable anchoring technology is used is generally about 30m in engineerings such as traffic, mines; And in hydroelectric project, anchor cable length is longer, is generally 50-80m., the anchor pole Dynamic Non-Destruction Measurement is applied to and has run into problems such as undesired signal is strong, useful signal is weak in the anchor cable quality testing.
In anchor cable Dynamic Non-Destruction Measurement and method research; The unilateral stretching mechanical characteristic of University Of Science and Technology Of Hunan, China Mining University's research anchor cable and the similarities and differences of anchor pole; Set up the extensional vibration mechanical model of prestress anchorage cable; Be mainly used in and analyze the propagation law of stress wave in anchor cable, and utilize stress wave to carry out the on-the-spot detection of anchorage cable anchoring quality; Fujian Scientific Research Institute of Machineryg is applied to stress wave in certain slope of highway anchor cable length detection.See that from searching document anchor cable length and anchoring section slip casting packing Dynamic Non-Destruction Measurement mainly adopt the elastic stress wave method, and have produced the anchor cable nondestructive testing instrument based on the elastic wave reflex method.Also there are other engineering geophysical methods such as electromagnetic wave method to detect the anchorage cable anchoring quality, but only limit to theoretical research, do not put into engineering practice.
In the Non-Destructive Testing of anchorage cable anchoring quality elastic wave reflex method; The elastic wave that excites is propagated in anchoring body; Owing to wavefront diffusion loss, propagation medium to reasons such as ripple absorption losss, it is fainter that the elastic wave signal is that useful signal generally becomes, and often covered by undesired signal.Butt joint is collected mail breath after routine data disposal methods such as filtering, often is difficult to effectively extract the reflected wave information that the wave impedance interface causes.
Thus, the signal that runs into reception to the detection of anchorage cable anchoring quality is fainter, and signal problem disturbs; Engineering technical personnel research and develop a kind of sensor special that is applicable to the anchorage cable anchoring quality testing; Attempt original signal bottom reflection ripple identification difficulty, after filtering, processing and amplifying, the interference wave before the bottom reflection ripple arrives also is exaggerated; Effective influence of jamming signal, effectively weak reflection wave signal amplitude obviously strengthens.
Summary of the invention
The purpose of the utility model is in order to overcome the defective of prior art; Provide that a kind of detection anchor cable low-frequency vibration acoustic signals is strong, resolution is high; The piezoelectric sensor that aftershock is short solves the weak and big problem of high-frequency interferencing signal energy of anchorage cable anchoring quality testing useful signal energy effectively.
The utility model solves its technical matters and adopts following technical scheme: a kind of anchorage cable anchoring quality detection sensor; Comprise base, be installed in shell and lid on the base; Mainly be that described base is a hollow; Anchor cable penetrates wherein, and trip bolt is fixed on base on the anchor cable, and gland nut is pressed on mass, electrode slice, piezoelectric ceramics on the base.
Said piezoelectric ceramic piece connects lead-in wire and cable, and electrode slice connects lead-in wire and cable.
Be with insulating sleeve on the said base, with gland nut mass, electrode slice, piezoelectric ceramics be pressed on the base again.
And said gland nut is pressed on mass, electrode slice, piezoelectric ceramics on the base, and sticking by sealant sealing, pours into sound absorption glue in the housing, and is sealed by lid.
And said trip bolt is two vertical each other settings, and base is fixed on the anchor cable.
And said trip bolt is at least two or more, and base is fixed on the anchor cable.
The utility model compared with prior art also has following major advantage:
1, because the utility model sensor adopts two orthogonal trip bolt devices is set; The trip bolt setting at least two or more, sensor base is fastened on the anchor cable steel strand wires, when elastic wave is propagated, will produce particle vibration in anchor cable; When elastic wave is delivered to base position; Particle vibration will be passed on the base, and the sensor conversion transmission signals of being convenient to be provided with on the base is more suitable for the reception of the signal of long anchor cable detection.
3, be provided with potsherd and electrode slice owing to be employed in base; When the flexible ripple particle vibration of base, potsherd and electrode slice constitute positive and negative electrode, convert the particle vibration of base into electric charge; Be about to vibration signal and become electric signal, to obtain the electric signal of the low-frequency vibration that anchor cable detects; And potsherd adopts a sheet of or increases by two the time and carries the useful area that changes into electric signal, can play and improve LF-response sensitivity widely, constrains high-frequency signal.
4, owing to adopt clamping nut, mass, potsherd, electrode slice and base are combined closely in one, so that the particle vibration of better response anchor cable, and, when mass adopts big weight block, the effect of being more convenient for improving the oppressive high-frequency signal of low frequency.
5, paste sealing owing to adopt gland nut that mass, electrode slice, piezoelectric ceramics are pressed on the base and with fluid sealant, play sealing function first, second play the insulating effect of sensor.Perfusion composite silicone rubber in the housing, silicon rubber plays waterproof and dampproof effect, is beneficial to voltage sensing signal; Simultaneously, silicon rubber plays sound absorption, the absorbing high-frequency signal with big mass; The sensor remained shock time is shortened, and short remained shock can improve signal resolution, simultaneously; The minimizing of high-frequency signal can make the ground unrest of sensor reduce, and improves the LF-response signal relatively; Make anchorage cable anchoring quality detection sensor effect better, both can detect the anchorage cable anchoring quality, also can detect anchor cable length.
Description of drawings
Fig. 1 is the anchorage cable anchoring quality detection sensor synoptic diagram of the utility model.
Shell (1), lid (2), cable (3), card circle (4), base (5), sound absorption glue (6), gland nut (7), mass (8), insulating sleeve (9), electrode slice (10), piezoelectric ceramic piece (11), lead-in wire (12), trip bolt (13), anchor cable (14).
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1, a kind of anchorage cable anchoring quality detection sensor.Sensor base (5) is a hollow; Anchor cable (14) can penetrate wherein; Trip bolt (13) is fixed on base (5) on the anchor cable (14), and trip bolt (13) can be two vertical each other settings, and base (5) is fixed on the anchor cable (14); But be at least two or more, anchor cable (14) and base (5) are closely linked.
Go up installation shell (1) at base (5), add lid (2) again, constitute outer sensor housing.Be with insulating sleeve (9) on the base (5); Piezoelectric sensor element is made up of piezoelectric ceramic piece (11), electrode slice (10), mass (8); Piezoelectric ceramic piece (11), electrode slice (10), mass (8) are enclosed within respectively outside the insulating sleeve (9), and gland nut (7) is pressed on piezoelectric ceramic piece (11), electrode slice (10), mass (8) on the base (5).
On the base (5); Fluid sealant sticks on base (5) with gland nut (7) piezoelectric ceramic piece (11), electrode slice (10), mass (8) and goes up sealing, and fluid sealant can be an epoxy glue, goes up at base (5) shell (1) is installed; Perfusion sound absorption glue (6) is sealed by lid (2) in the housing (1); Sound absorption glue (6) can be used silicon rubber, and piezoelectric ceramics (11) connects lead-in wire (12) and cable (3), and electrode slice (10) connects lead-in wire (12) and cable (3), by cable (3) output transducing signal.
The anchorage cable anchoring quality detection sensor, with anchor cable (14) through base (5), more than at least two or two above trip bolts (13) compress anchor cable (14); Make anchor cable (14) and base (5) closely together; Apply instant impact in anchor cable (14) exposed junction end, excite longitudinal elastic wave, when elastic wave is propagated, will produce particle vibration in anchor cable (14); Elastic wave is delivered to base (5) when locating, and particle vibration will be passed on the base (5).
When the flexible ripple particle vibration of base (5); Piezoelectric ceramic piece (11) and electrode slice (10) convert the particle vibration of base (5) into electric charge; Be about to vibration signal and become electric signal; Gland nut (7) is combined closely mass (8), potsherd (11), electrode slice (10) in one with base (5), responds the particle vibration of anchor cable (14) preferably; It mainly is low-frequency vibration that anchor cable (14) detects, potsherd (10) adopt large stretch of or two can improve LF-response sensitivity, constrain high-frequency signal, mass (8) can improve low frequency; Constrain high frequency, simultaneously, silicon rubber absorbing high-frequency signal; Make the sensor remained shock time short, improve the resolution of anchor cable detection signal, therefore; The minimizing of high-frequency signal can make the ground unrest of sensor reduce, and improves the LF-response signal relatively; Make anchorage cable anchoring quality testing signal strong, both can detect the anchorage cable anchoring quality, also can detect anchor cable length.
Claims (6)
1. anchorage cable anchoring quality detection sensor; Comprise base (5), be installed in shell (1) and lid (2) on the base (5); It is characterized in that: described base (5) is for hollow; Anchor cable (14) penetrates wherein, and trip bolt (13) is fixed on base (5) on the anchor cable (14), and gland nut (7) is pressed on mass (8), electrode slice (10), piezoelectric ceramics (11) on the base (5).
2. a kind of anchorage cable anchoring quality detection sensor according to claim 1 is characterized in that: said piezoelectric ceramic piece (11) connects lead-in wire (12) and cable (3), and electrode slice (10) connects lead-in wire (12) and cable (3).
3. a kind of anchorage cable anchoring quality detection sensor according to claim 1 is characterized in that: be with insulating sleeve (9) on the said base (5), use gland nut (7) that mass (8), electrode slice (10), piezoelectric ceramics (11) are pressed on the base (5) again.
4. a kind of anchorage cable anchoring quality detection sensor according to claim 1; It is characterized in that: said gland nut (7) is pressed on mass (8), electrode slice (10), piezoelectric ceramics (11) on the base (5); And it is sticking by sealant sealing; Pour into sound absorption glue (6) in the housing (1), and seal by lid (2).
5. a kind of anchorage cable anchoring quality detection sensor according to claim 1 is characterized in that: said trip bolt (13) is two vertical each other settings, and base (5) is fixed on the anchor cable (14).
6. a kind of anchorage cable anchoring quality detection sensor according to claim 5 is characterized in that: said trip bolt (13) is at least two or more, and base (5) is fixed on the anchor cable (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220048609 CN202471653U (en) | 2012-02-15 | 2012-02-15 | Anchoring quality detection sensor for anchor cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220048609 CN202471653U (en) | 2012-02-15 | 2012-02-15 | Anchoring quality detection sensor for anchor cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471653U true CN202471653U (en) | 2012-10-03 |
Family
ID=46919805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220048609 Expired - Fee Related CN202471653U (en) | 2012-02-15 | 2012-02-15 | Anchoring quality detection sensor for anchor cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202471653U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769123A (en) * | 2016-11-18 | 2017-05-31 | 安徽理工大学 | Car and its application method are evaluated in a kind of Drift stability measurement |
| CN107227968A (en) * | 2017-07-27 | 2017-10-03 | 贵州大学 | A kind of self-inspection anchor pole and its application method |
| CN109026107A (en) * | 2018-09-21 | 2018-12-18 | 北方工业大学 | Switch type anchor rod cable stress measuring device |
-
2012
- 2012-02-15 CN CN 201220048609 patent/CN202471653U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769123A (en) * | 2016-11-18 | 2017-05-31 | 安徽理工大学 | Car and its application method are evaluated in a kind of Drift stability measurement |
| CN107227968A (en) * | 2017-07-27 | 2017-10-03 | 贵州大学 | A kind of self-inspection anchor pole and its application method |
| CN107227968B (en) * | 2017-07-27 | 2023-06-16 | 贵州大学 | Self-checking anchor rod and using method thereof |
| CN109026107A (en) * | 2018-09-21 | 2018-12-18 | 北方工业大学 | Switch type anchor rod cable stress measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102127917A (en) | Low-strain testing device for detecting integrity of ultralong bored concrete pile | |
| CN108827825B (en) | System and method for detecting compactness of grouting material in steel bar sleeve | |
| CN111577360B (en) | Use method of recoverable acquisition instrument for real-time observation of stress characteristic and vibration characteristic of stope surrounding rock | |
| CN103308388A (en) | Active or passive combined acoustic testing and seepage testing combined system for rock triaxial test | |
| CN101570974A (en) | Method for detecting quality of existing building foundation piles with parallel seismic method | |
| CN101761062A (en) | Wireless rotating penetrometer | |
| CN104007176A (en) | Full-wave field detection system and method of complex geotechnical engineering medium | |
| CN202471653U (en) | Anchoring quality detection sensor for anchor cable | |
| CN102928512A (en) | Test method of rock aging deterioration process | |
| CN103245732A (en) | Pipeline grouting mass stress wave detecting signal processing method based on wavelet extraction | |
| CN102072689A (en) | Experimental device for simulating 200-meter deep water blasting under moving water state | |
| AU2015208554A1 (en) | Rock acoustic wave detection transducer | |
| CN106525969A (en) | Device and method for carrying out nondestructive bolt testing by adopting cosine linear scanning signal | |
| CN102608223A (en) | Digital signal analysis method based on spectral energy ratio | |
| CN103698805A (en) | Columnar jointed rock mass unidirectional micro-seismic monitoring sensor layout direction determining method | |
| CN106049567B (en) | Parallel seismic wave method determines the detection means and its detection method of foundation pile length | |
| CN208705282U (en) | The device of built-in type detection anchor rope grouting compactness | |
| CN204101516U (en) | A kind of colliery resin anchor anchoring quality non destructive testing device | |
| CN207964542U (en) | A kind of monitoring ultrasonic system for sand pile quality real-time control | |
| CN107843652A (en) | Portable anchor rod anchoring quality detecting instrument and detection method | |
| CN109594977A (en) | A kind of underground sonic system | |
| CN211783355U (en) | Effective grouting length test system for anchor rod | |
| CN111562312B (en) | Detection system and method for evaluating damage condition of rock and gel material | |
| CN209469427U (en) | A kind of underground sonic system | |
| CN112835104A (en) | Unconventional reservoir natural frequency in-situ measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20140215 |