CN202305477U - Non-destructive detection device for wood stress waves - Google Patents
Non-destructive detection device for wood stress waves Download PDFInfo
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- CN202305477U CN202305477U CN2011202845714U CN201120284571U CN202305477U CN 202305477 U CN202305477 U CN 202305477U CN 2011202845714 U CN2011202845714 U CN 2011202845714U CN 201120284571 U CN201120284571 U CN 201120284571U CN 202305477 U CN202305477 U CN 202305477U
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- slide block
- anchor clamps
- stress wave
- underframe
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Abstract
A non-destructive detection device for wood stress waves comprises an underframe, locking slide blocks, supporting rods with scales, a hammer, an angular scale, fastening bolts, sensor clamps, a pallet, slide blocks, pressure plates, and other elements. According to the detection device provided by the utility model, stress wave sensors are fixed on two sides of a to-be-detected wood test piece through the dedicated sensor clamps, so as to prevent the sensors from shaking in the excitation process; at the same time, the stress wave sensors are excitated by the suspended hammer in constant angle and strength, thereby avoiding random variation of knocking strength and angle, which is caused by the reason that an operator holds the hammer to knock the stress wave sensors, as well as other uncertain factors; and the detected stress wave signal can truly reflect the internal structure of the to-be-detected wood test piece, thereby improving the detection precision for wood property and internal defect.
Description
Technical field
The utility model relates to forest reserves health assessment and timber production and processing field; Relate in particular to a kind of can the fixation of sensor position, allow with constant angles and dynamics stimulus sensor and then obtain timber stress wave the cannot-harm-detection device of high precision stress wave signal.
Background technology
General Principle based on the Wood Defects Testing of stress wave is: through knocking the shockwave sensor contact of being close to timber one side to be detected; Produce stress wave signal; By the shockwave sensor contact pickoff signals that is arranged in tested timber opposite side; According to wave theory, velocity of propagation, amplitude and the waveform character etc. of corresponding Reeb signal are analyzed then, thereby wood property or inherent vice (like hole, crackle, rotten etc.) are made assessment.
At present, when carrying out wood quality or Inner Defect Testing, the normally hand-held hand hammer of operating personnel knocks the shockwave sensor that is suspended on the tested timber.In this process, have a series of uncertain factors, as knock strength, knock angle, the random variation of the contact area of sensor contact and hammer etc.In addition, because sensor only relies on nail to be suspended on the tested timber test specimen, therefore when knocking, can produce and rock.These uncertain factors and people are that the randomness of knocking makes that the variational regularity of detected stress wave signal is lower; Be difficult to truly reflect wood internal structure; Seriously influenced the assessment result to timber inherent vice to be detected, it is lower to cause detecting degree of accuracy.
Summary of the invention
Based on above-mentioned existing in prior technology problem, the embodiment of the utility model provides a kind of timber the cannot-harm-detection device based on stress wave.This device makes shockwave sensor be fixed on the both sides of tested timber test specimen through the sensor anchor clamps of special use, can avoid in the sensor excitation process, producing and rock.Simultaneously; Adopt the hand hammer of suspension to encourage with constant angles and dynamics counter stress wave sensor; That can eliminate that the hand-held hand hammer of operating personnel knocks that shockwave sensor brings knocks strength, knocks the uncertain factors such as random variation of angle; Thereby make detected stress wave signal can reflect tested timber test specimen inner structure more realistically, improve the accuracy of detection of wood property and inherent vice.
This timber the cannot-harm-detection device that the utility model provided comprises: members such as underframe, locking slide block, band scale pole, hand hammer, angle scale, fastening bolt, sensor anchor clamps, pallet, slide block, pressing plate.The locking slide block is divided into two, is installed on the underframe, can be free to slide.Band scale pole is contained scale, is used to indicate the height of sensor anchor clamps, and it is fixed on the locking slide block, can on underframe, be free to slide with the locking slide block.The sensor anchor clamps are connected with slide block on being installed in band scale pole through steel plate, and slide block moves up and down the height of adjustable sensor anchor clamps.On the sensor anchor clamps fastening bolt is installed, fastening bolt is connected with pressing plate, and bolt can be tightened and loosen.The top of sensor anchor clamps also is equipped with angle scale, and angle scale is connected with hand hammer, the angle when angle scale is used to indicate the hand hammer excitation.Pallet is fixed on the underframe through steel plate, is used to place tested timber test specimen.
The principle of work of said timber the cannot-harm-detection device is: tested timber test specimen is placed on above the pallet, will locks then after slide block moves to the suitable location of underframe, fixed band scale pole position tights a bolt.Move the slide block that is installed on the band scale pole again, confirm the suitable detection height of sensor anchor clamps.Then shockwave sensor is placed in the sensor anchor clamps, tightens fastening bolt, pressing plate is pressed on the shockwave sensor, guarantee that it does not produce to rock in test process.According to the angle scale indication, hand hammer is put down the excitation shockwave sensor with constant height and angle, adopt the stress wave tester and the computing machine that are connected with sensor to pick up stress wave signal, and it is analyzed.
Description of drawings
Fig. 1 is the front elevation of timber stress wave the cannot-harm-detection device.
Fig. 2 is the left view of timber stress wave the cannot-harm-detection device.
Among the figure: 1. underframe 2. locking slide blocks 3. are with scale poles 4. hand hammers 5. angle scales 6. shockwave sensors 7. fastening bolts 8. sensor anchor clamps 9. tested timber test specimen 10. pallets 11. slide blocks 12. pressing plates
Embodiment
As illustrated in fig. 1 and 2, when timber is carried out Non-Destructive Testing, at first tested timber test specimen 9 is placed on above the pallet 10, will lock slide block 2 then and on underframe 1, move, after locking slide block 2 moves to suitable location, tight a bolt and fix.After being with moving slider 11 on the scale pole 3, treating that the sensor anchor clamps 8 that are connected with slide block 3 move to the suitable detection height of tested timber test specimen 9, fixedly moving slider 11.
After the stationkeeping of sensor anchor clamps 8; Shockwave sensor 6 is placed in sensor anchor clamps 8 grooves; Through fastening bolt 7 is tightened, pressing plate 12 is moved down again, shockwave sensor 6 is pressed in sensor anchor clamps 8 grooves the most at last; Thereby the position that makes shockwave sensor 6 keeps motionless, guarantees that shockwave sensor 6 can not produce in test process to rock.
After the stationkeeping of the shockwave sensor 6 that is arranged in tested timber test specimen 9 both sides, shockwave sensor 6 is connected with stress wave tester and computing machine through lead, then can begin test.In when test, according to the indication on the angle scale 5, hand hammer 4 is put down counter stress wave sensor 6 with constant height and angle encourage, so then eliminated the variation of the stress wave signal that the uncertainty of human factor or percussion power causes effectively.After utilizing hand hammer 4 repeatedly to encourage with constant power counter stress wave sensor 6; Stress wave signal characteristic through the shockwave sensor 6 that is arranged in opposite side is picked up is analyzed, and then can make assessment to the wood property or the inherent vice of tested timber test specimen 9.
The above; Be the preferable embodiment of the utility model; The protection domain of the utility model is not limited to listed embodiment; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (2)
1. timber stress wave the cannot-harm-detection device comprises members such as underframe, locking slide block, band scale pole, hand hammer, angle scale, fastening bolt, sensor anchor clamps, pallet, slide block, pressing plate, it is characterized in that locking two of slide blocks; Be installed in the underframe left and right sides respectively, band scale strut fixation horizontally slips on underframe with the locking slide block on the locking slide block; The sensor anchor clamps are connected with slide block on being installed in band scale pole, and slide block moves up and down adjustable sensor anchor clamps height, on the sensor anchor clamps fastening bolt is installed; Fastening bolt is connected with pressing plate, places shockwave sensor, sensor anchor clamps top established angle scale below the pressing plate; Angle scale is connected with hand hammer; Angle when angle scale is used to indicate the hand hammer excitation, pallet is fixed on the underframe, is used to place tested timber test specimen.
2. device according to claim 1, its principle of work is: tested timber test specimen is placed on above the pallet, will locks then after slide block moves to the suitable location of underframe, fixed band scale pole position tights a bolt; Move the slide block that is installed on the band scale pole again, confirm the suitable detection height of sensor anchor clamps; Then shockwave sensor is placed in the sensor anchor clamps, tightens fastening bolt, pressing plate is pressed on the shockwave sensor, guarantee that it does not produce to rock in test process; According to the angle scale indication, hand hammer is put down the excitation shockwave sensor with constant height and angle, adopt the stress wave tester and the computing machine that are connected with sensor to pick up stress wave signal, and it is analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202845714U CN202305477U (en) | 2011-08-08 | 2011-08-08 | Non-destructive detection device for wood stress waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202845714U CN202305477U (en) | 2011-08-08 | 2011-08-08 | Non-destructive detection device for wood stress waves |
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| Publication Number | Publication Date |
|---|---|
| CN202305477U true CN202305477U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202845714U Expired - Fee Related CN202305477U (en) | 2011-08-08 | 2011-08-08 | Non-destructive detection device for wood stress waves |
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| CN (1) | CN202305477U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483394A (en) * | 2014-10-16 | 2015-04-01 | 中国计量学院 | A constant force device based on acoustic emission time reversion |
| CN106885846A (en) * | 2017-01-20 | 2017-06-23 | 浙江农林大学 | Trees defect detecting device and detection method |
| CN107941908A (en) * | 2017-11-06 | 2018-04-20 | 安徽建筑大学 | A kind of fabricated shear wall sits pulp layer defect inspection method |
| CN108226289A (en) * | 2017-12-22 | 2018-06-29 | 太原理工大学 | The device and test specimen test method of acoustic emission probe and microseism probe are installed simultaneously |
| CN110207874A (en) * | 2019-07-08 | 2019-09-06 | 长春理工大学 | A kind of experimental rig for probing into non-destructive testing residual stress |
| CN113686954A (en) * | 2021-07-14 | 2021-11-23 | 中国水利水电科学研究院 | Exciting small hammer for detecting stress wave of anchor rod and using method thereof |
-
2011
- 2011-08-08 CN CN2011202845714U patent/CN202305477U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483394A (en) * | 2014-10-16 | 2015-04-01 | 中国计量学院 | A constant force device based on acoustic emission time reversion |
| CN104483394B (en) * | 2014-10-16 | 2017-05-03 | 中国计量学院 | A constant force device based on acoustic emission time reversion |
| CN106885846A (en) * | 2017-01-20 | 2017-06-23 | 浙江农林大学 | Trees defect detecting device and detection method |
| CN106885846B (en) * | 2017-01-20 | 2019-04-23 | 浙江农林大学 | Trees defect detecting device and detection method |
| CN107941908A (en) * | 2017-11-06 | 2018-04-20 | 安徽建筑大学 | A kind of fabricated shear wall sits pulp layer defect inspection method |
| CN108226289A (en) * | 2017-12-22 | 2018-06-29 | 太原理工大学 | The device and test specimen test method of acoustic emission probe and microseism probe are installed simultaneously |
| CN110207874A (en) * | 2019-07-08 | 2019-09-06 | 长春理工大学 | A kind of experimental rig for probing into non-destructive testing residual stress |
| CN113686954A (en) * | 2021-07-14 | 2021-11-23 | 中国水利水电科学研究院 | Exciting small hammer for detecting stress wave of anchor rod and using method thereof |
| CN113686954B (en) * | 2021-07-14 | 2022-11-22 | 中国水利水电科学研究院 | Small exciting hammer for detecting stress wave of anchor rod and using method of small exciting hammer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Yang Xuechun Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Yang Xuechun Document name: Notification of Termination of Patent Right |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20130808 |