CN2837823Y - Hand-held drop hammer deflectometer with positioning device - Google Patents
Hand-held drop hammer deflectometer with positioning device Download PDFInfo
- Publication number
- CN2837823Y CN2837823Y CN 200520107059 CN200520107059U CN2837823Y CN 2837823 Y CN2837823 Y CN 2837823Y CN 200520107059 CN200520107059 CN 200520107059 CN 200520107059 U CN200520107059 U CN 200520107059U CN 2837823 Y CN2837823 Y CN 2837823Y
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- China
- Prior art keywords
- ground
- hand
- displacement sensor
- sensor probe
- weight deflectometer
- 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
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
Hand-held type weight deflectometer that falls with positioner mainly includes current hand-held type weight deflectometer that falls, falls hammer, rubber head, frame, loading board, force sensor, displacement sensor probe etc. its characterized in that promptly: a positioning device is additionally arranged on a plane of the lower end of a displacement sensor probe of the existing hand-held falling weight deflectometer, which is contacted with the ground, and the positioning device is composed of a V-shaped or conical needle. When in measurement, the V-shaped or conical needle is inserted into the ground or is propped against the ground (when the ground is hard), even if the impact force is larger, the position of the displacement sensor does not move because the displacement sensor is not in plane floating contact with the ground, thereby improving the measurement accuracy; when the carrier plate is away from the ground (unmeasured state), the V-shaped needle extends out of the lower plane of the carrier plate. The utility model has the advantages of high measurement accuracy and stable positioning.
Description
Technical field
The utility model relates to a kind of hand-held Falling Weight Deflectometer, has the hand-held Falling Weight Deflectometer of locating device, is mainly used in the measurement of highway pavement intensity.
Background technology
At present, the normal hand-held Falling Weight Deflectometer of using, as shown in Figure 1, mainly by drop hammer 1, Rubber end 2, upper frame 3, underframe 4, loading plate 5, guide pole 6, force transducer 7, spring 8, displacement transducer 9 and displacement sensor probe 10 form, guide pole 6 passes 1 the mesopore of dropping hammer, upper frame 3 is rigidly connected with guide pole 6 screw threads, and Rubber end 2 is rigidly connected with upper frame 3; Force transducer 7 is positioned at the bottom of upper frame 3, the upper end of underframe 4 (being that force transducer 7 is up and down between the framework), and underframe 4 is rigidly connected with loading plate 5; Displacement transducer 9 and displacement sensor probe 10 are rigidly connected and are placed between underframe 4 and the loading plate 5, and displacement transducer 9 flexibly connects by spring 8 with displacement sensor probe 10 and upper frame 3.Its course of work is: loading plate 5 places ground, displacement sensor probe 10 contacts with ground by the mesopore of loading plate 5, to drop hammer and 1 manually mention freely falling body behind the certain altitude, drop hammer 1 under the guide effect of guide pole 6, impact, produce impulsive force with Rubber end 2, this impulsive force acts on ground by upper frame 3, underframe 4, force transducer 7 and loading plate 5, ground produces displacement, and this displacement is measured by displacement transducer 9, and impulsive force is measured by force transducer 7.
The hand-held Falling Weight Deflectometer of this structure is because displacement transducer 9 precision are very high, so displacement transducer 9 and pop one's head in 10 except by spring 8 (flexible portion) with underframe 4 contacts, all can not there be contact at other any position, in case otherwise the decline at once of contact measurement precision; But because the volume and weight of whole device self is very little, displacement sensor probe 11 is the plane with ground contact portion, do not locate, therefore under the effect of impulsive force, entire measuring device is all being rocked, therefore contact with parts such as loading plate inevitably, cause measuring error to increase like this, measuring accuracy descends.
The utility model content
Technology of the present utility model is dealt with problems: overcome the deficiencies in the prior art, provide a kind of and measuring accuracy is improved and the big or small hand-held Falling Weight Deflectometer with locating device that influences of the power that is not hit by locating device.
Technical solution of the present utility model: hand-held Falling Weight Deflectometer with locating device, mainly comprise existing hand-held Falling Weight Deflectometer, promptly drop hammer, Rubber end, framework, loading plate, force transducer, displacement transducer, displacement sensor probe etc., its characteristics are: the plane that contacts with ground in the displacement sensor probe lower end of existing hand-held Falling Weight Deflectometer is added with locating device, and this locating device is made of V-type or taper pin.When measuring, V-type or taper pin insert ground or withstand on (when ground is hard) on the ground, even at this moment impulsive force is big again, do not contact because displacement sensor probe is not that the plane is unsteady with ground, so the position of displacement transducer can not moved, measuring accuracy is improved; (do not measure state) when the loading plate built on stilts, v type needle stretches out the lower plane of loading plate.
Symmetria bilateralis in the loading plate upper surface of original hand-held Falling Weight Deflectometer is added with drop handle, and after drop handle kept flat, outboard end should surpass the loading plate external diameter, and this drop handle is used for: (1) is with the measurement mechanism men hoisting or lift from ground; (2) people's pin steps down in the stability that can increase single unit system on this drop handle greatly.
The utility model advantage compared with prior art is: the utility model has been owing to added v type needle as locating device, makes the measuring accuracy influence of power and device stability itself that is not hit, so has the advantage of measuring accuracy height, positioning stablity.
Description of drawings
Fig. 1 is the structural representation of existing hand-held Falling Weight Deflectometer;
Fig. 2 is the hand-held Falling Weight Deflectometer structural representation with locating device of the present utility model.
Embodiment
As shown in Figure 2, the utility model mainly comprise drop hammer 1, Rubber end 2, upper frame 3, underframe 4, loading plate 5, guide pole 6, force transducer 7, spring 8, displacement transducer 9, displacement sensor probe 10 and locating device 11 form, guide pole 6 passes 1 the mesopore of dropping hammer, upper frame 3 is rigidly connected with guide pole 6 screw threads, and Rubber end 2 is rigidly connected with upper frame 3; Force transducer 7 is positioned at the bottom of upper frame 3, the upper end of underframe 4 (being that force transducer 7 is between upper frame 3 and underframe 4), and underframe 4 is rigidly connected with loading plate 5; Displacement transducer 9 and displacement sensor probe 10 are rigidly connected and are placed between underframe 4 and the loading plate 5, and displacement transducer 9 flexibly connects by spring 8 with displacement sensor probe 10 and underframe 4; Locating device 11 is added in 10 times transverse planes of displacement sensor probe, and with being threaded or making an integral body with the plane of displacement sensor probe 10 lower ends of displacement sensor probe 10, locating device 11 is made of V-type or taper pin.
In addition, the utility model is added with drop handle 12 in the symmetry of loading plate 5 upper surfaces of original hand-held Falling Weight Deflectometer, and after drop handle 12 kept flat, its outboard end should surpass the external diameter of loading plate 5.
Claims (2)
1, the hand-held Falling Weight Deflectometer that has locating device, mainly comprise drop hammer, Rubber end, framework, loading plate, force transducer, displacement transducer, displacement sensor probe etc., it is characterized in that: the plane that contacts with ground in described displacement sensor probe lower end is added with locating device, and this locating device is made of V-type or taper pin.
2, the hand-held Falling Weight Deflectometer with locating device according to claim 1, it is characterized in that: the symmetria bilateralis in described loading plate upper surface is added with drop handle, and after drop handle kept flat, outboard end should surpass the loading plate external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520107059 CN2837823Y (en) | 2005-09-01 | 2005-09-01 | Hand-held drop hammer deflectometer with positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520107059 CN2837823Y (en) | 2005-09-01 | 2005-09-01 | Hand-held drop hammer deflectometer with positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2837823Y true CN2837823Y (en) | 2006-11-15 |
Family
ID=37392311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520107059 Expired - Fee Related CN2837823Y (en) | 2005-09-01 | 2005-09-01 | Hand-held drop hammer deflectometer with positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2837823Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162217A (en) * | 2010-11-18 | 2011-08-24 | 武汉武大卓越科技有限责任公司 | Laser dynamic deflection survey vehicle |
| CN102466598A (en) * | 2010-11-15 | 2012-05-23 | 北京航天计量测试技术研究所 | Multipoint sensor FWD (Falling Weight Deflectometer) |
| CN111829911A (en) * | 2020-07-14 | 2020-10-27 | 北京建筑材料科学研究总院有限公司 | Performance measuring device for filling leveling layer on floating ground |
-
2005
- 2005-09-01 CN CN 200520107059 patent/CN2837823Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466598A (en) * | 2010-11-15 | 2012-05-23 | 北京航天计量测试技术研究所 | Multipoint sensor FWD (Falling Weight Deflectometer) |
| CN102466598B (en) * | 2010-11-15 | 2014-06-18 | 北京航天计量测试技术研究所 | Multipoint sensor FWD (Falling Weight Deflectometer) |
| CN102162217A (en) * | 2010-11-18 | 2011-08-24 | 武汉武大卓越科技有限责任公司 | Laser dynamic deflection survey vehicle |
| CN102162217B (en) * | 2010-11-18 | 2012-06-06 | 武汉武大卓越科技有限责任公司 | Laser dynamic deflection survey vehicle |
| CN111829911A (en) * | 2020-07-14 | 2020-10-27 | 北京建筑材料科学研究总院有限公司 | Performance measuring device for filling leveling layer on floating ground |
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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: 20061115 Termination date: 20091009 |