CN2856134Y - Monkey hammer type benkelman beams deflectometer - Google Patents
Monkey hammer type benkelman beams deflectometer Download PDFInfo
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- CN2856134Y CN2856134Y CN 200620068519 CN200620068519U CN2856134Y CN 2856134 Y CN2856134 Y CN 2856134Y CN 200620068519 CN200620068519 CN 200620068519 CN 200620068519 U CN200620068519 U CN 200620068519U CN 2856134 Y CN2856134 Y CN 2856134Y
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- data acquisition
- weight
- acquisition controller
- hydraulic power
- power unit
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Abstract
A falling weight deflectometer (FWD) is provided with vehicle power supply, detection members, hydraulic power unit, falling weight system connected with the hydraulic power unit by oil cylinder, data acquisition controller, and microcomputer system. Load generator consists of weight, loading platform, braking system for lifting and releasing the weight, and bearing plate. Acceleration sensors for detecting impact force are respectively arranged on the weight with known mass and the loading platform in the falling weight system. Acceleration sensor for detecting deflection is arranged at central axis position under the loading platform in the falling weight system. The above acceleration sensors are respectively connected to input terminal of the data acquisition controller, output terminal of the data acquisition controller is connected with the hydraulic power unit, and communication interface of the data acquisition controller is connected with the microcomputer system. The utility model effectively improves precision of evaluation result, facilitates calibration, mounting and dismounting of acceleration sensors, is easy in maintenance, and overcomes shortcomings of conventional FWD.
Description
Technical field
The utility model relates to a kind of checkout gear, particularly a kind of equipment that the highway pavement supporting capacity is detected automatically, Falling Weight Deflectometer.
Background technology
Falling Weight Deflectometer (FWD) is present more advanced road surface Bearing Capacity Evaluation equipment.Its basic principle is as follows: discharge after weight is promoted to certain altitude, tension weight churning is positioned at the shock loading that produces certain time behind the weighted platform on the road surface, the road surface produces deformation under this loading, record the displacement of impact load and pavement deformation, by post-processed, thereby estimate the road surface supporting capacity.96244893.1 number Chinese utility model patent improves the structure of above-mentioned traditional Falling Weight Deflectometer, has improved data processing circuit.With this patent is that the structure of traditional Falling Weight Deflectometer of representative is: vehicle power and detection part are placed on the trailer, comprise in the detection part, hydraulic power system, the load generator (being also referred to as the system of dropping hammer) that joins by oil cylinder and hydraulic power system, join with the load generator and measure the absolute type displacement transducer and the power sensor of its output, and the peak value that is connected absolute type displacement transducer and power sensor output keeps display circuit; Load generator wherein comprises hoisting mechanism, the relieving mechanism of weight, the loaded plate composition of weight, weighted platform, weight.
Falling Weight Deflectometer of the prior art has following deficiency:
1) existing Falling Weight Deflectometer generally adopts the force sensor measuring impact force, the installation and removal complexity of power sensor, have the environment measurement impact force of acceleration, ignoring the influence of power sensor and loading disc sole mass, the error of the power that impacts measurement result measurement result.
2) existing Falling Weight Deflectometer generally adopts trailer-tractor structure, complex structure, data acquisition control device is placed in the tractor, and the line of power sensor and flexure sensor is connected to data acquisition control device in the tractor from trailer, causes complicated line.
3) the demarcation difficulty of power sensor, the impact force that records is difficult to upwards trace to the source.
Summary of the invention
At the above-mentioned deficiency of prior art, the purpose of this utility model is to provide a kind of novel Falling Weight Deflectometer of measuring accurate, practical, easy care and compact conformation.
The scheme of finishing the foregoing invention task is: a kind of Falling Weight Deflectometer, be provided with vehicle power and detection part, detection part comprises: hydraulic power unit, the system of dropping hammer of joining by oil cylinder and hydraulic power unit, data acquisition controller and microsystem, load generator wherein is by weight, weighted platform, realize pull the system mechanism and the loaded plate composition of the lifting and the release of weight, it is characterized in that, the acceleration transducer of measuring impact force is separately positioned on the weighted platform of the weight of the known quality in the system of dropping hammer and known quality, the acceleration transducer of measuring flexure is arranged on central axis position, weighted platform below in the system of dropping hammer, above-mentioned acceleration transducer connects the input of data acquisition controller respectively, the output of data acquisition controller connects hydraulic power unit, and the PORT COM of data acquisition controller connects microsystem.
Utility model adopts three groups of acceleration transducers to replace displacement transducer of the prior art and power sensor respectively, avoid the power sensor to install, dismantle disadvantages such as complexity and demarcation difficulty, eliminated the error that causes because of the influence of ignoring power sensor and loading disc sole mass.
Further improve, the utlity model has following prioritization scheme:
1, all parts that comprise detection part and data acquisition control device are placed on the same movably bearing structure (for example middle bus, lorry etc.).Like this all parts unifications are placed on a middle bus or the lorry, have avoided the labyrinth of trailer-tractor, also reduced complicated line.
2, be respectively equipped with radio receiver-transmitter on data acquisition controller output port and the microsystem.Promptly, the wireless mode communication is adopted in being connected of data acquisition controller output port and microsystem, has omitted on line complicated between data acquisition controller and the microsystem, has improved the reliability of whole system, make things convenient for the connection and the dismounting of equipment, reduced operating personnel's workload.
The utility model adopts a kind of mode that is different from present any Falling Weight Deflectometer to measure tension weight churning power: use acceleration transducer to replace the force sensor measuring impact force, realize the accurate measurement of impact power, improved the accuracy of evaluation result effectively.This technical scheme is convenient for the installation and removal of acceleration transducer, and easy care makes things convenient for the demarcation of sensor, has overcome the multiple disadvantage of traditional Falling Weight Deflectometer.
Description of drawings
Fig. 1 is the application's structural representation;
Fig. 2 is the drop hammer structural representation of system of the application.
The specific embodiment
Embodiment 1, Falling Weight Deflectometer, be provided with vehicle power and detection part, detection part comprises: hydraulic power unit, the system of dropping hammer of joining by oil cylinder and hydraulic power unit, data acquisition controller and microsystem, load generator wherein is by weight, weighted platform, the hoisting mechanism of weight, the relieving mechanism of weight and loaded plate are formed, it is characterized in that, the acceleration transducer of measuring impact force is separately positioned on the weighted platform of the weight of the known quality in the system of dropping hammer and known quality, the acceleration transducer of measuring flexure is arranged on central axis position, weighted platform below in the system of dropping hammer, above-mentioned acceleration transducer connects the input of data acquisition controller respectively, the output of data acquisition controller connects hydraulic power unit, and the PORT COM of data acquisition controller connects microsystem.All parts that comprise detection part and data acquisition control device are placed on a middle bus or the lorry.Wireless communication mode is adopted in being connected of data acquisition controller output port and microsystem.
As shown in Figure 1: movably bearing structure 1 is to test point, at first hydraulic power unit 2 is controlled the system of dropping hammer 3 and is placed ground, the weight of the system 3 of will dropping hammer then discharges after promoting certain altitude, produce the impact load of certain time, make ground produce deformation, accurately obtain impact force by the acceleration transducer 5 on the weighted platform that is fixed on acceleration transducer 4 on the known quality weight and known quality, improved the precision of measuring impact force greatly.By with sensor stand that weighted platform is connected on acceleration transducer 6 signals to data acquisition controller 7 obtain deflection value, survey data is sent to the microsystem 8 that has radio receiving transmitting module by the radio receiving transmitting module in the data acquisition controller 7.Vehicle power 9 provides power supply for hydraulic power system 2 and data acquisition controller 7.
The structure of the system of dropping hammer, please be simultaneously with reference to Fig. 2: the system of dropping hammer 3 that is fixed on the removable bearing structure 1 travels to measuring point, auxiliary oil cylinder 22 system of will dropping hammer places on the ground, master cylinder 21 is fixed on the load plate 31, be enclosed within the outer weights 32 of master cylinder 21 be positioned at load plate above, promote weight 32 by the system of the pulling mechanism 33 that is fixed on master cylinder 21 upper piston rods, to certain altitude, the system of pulling mechanism 33 discharges weight 32 under the effect of hydraulic power unit 2, impact load plate 31, the loading disc 34 that is fixed on the load plate below is with impact force directed ground; Fall constantly to the tension weight churning terminal procedure at weight 32, data acquisition controller 7 picks up acceleration transducer 4 that is fixed on the weight 32 and acceleration transducer 5 signals that are fixed on the loading disc 34, and be positioned at acceleration transducer 6 signals on the sensor stand 35 that passes on loading disc 34 central axis, radio receiving transmitting module by data acquisition controller 7 transfers to the microsystem 8 that has radio receiving transmitting module with survey data, and 8 pairs of survey data of microsystem are handled size and the deflection value that accurately obtains the impact process impact force.
Claims (3)
1, a kind of Falling Weight Deflectometer, be provided with vehicle power and detection part, detection part comprises: hydraulic power unit, the system of dropping hammer of joining by oil cylinder and hydraulic power unit, data acquisition controller and microsystem, load generator wherein is by weight, weighted platform, realize pull the system mechanism and the loaded plate composition of the lifting and the release of weight, it is characterized in that, the acceleration transducer of measuring impact force is separately positioned on the weighted platform of the weight of the known quality in the system of dropping hammer and known quality, the acceleration transducer of measuring flexure is arranged on central axis position, weighted platform below in the system of dropping hammer, above-mentioned acceleration transducer connects the input of data acquisition controller respectively, the output of data acquisition controller connects hydraulic power unit, and the PORT COM of data acquisition controller connects microsystem.
2, according to the described Falling Weight Deflectometer of claim 1, it is characterized in that, comprise that all parts of detection part and data acquisition control device are placed on the same movably bearing structure.
According to claim 1 or 2 described Falling Weight Deflectometer, it is characterized in that 3, wireless communication mode is adopted in being connected of data acquisition controller output port and microsystem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068519 CN2856134Y (en) | 2006-01-16 | 2006-01-16 | Monkey hammer type benkelman beams deflectometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620068519 CN2856134Y (en) | 2006-01-16 | 2006-01-16 | Monkey hammer type benkelman beams deflectometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2856134Y true CN2856134Y (en) | 2007-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620068519 Expired - Lifetime CN2856134Y (en) | 2006-01-16 | 2006-01-16 | Monkey hammer type benkelman beams deflectometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN2856134Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698495A (en) * | 2012-09-28 | 2014-04-02 | 北京航天计量测试技术研究所 | Load transmission capacity measurement device for concrete pavement joint |
| CN104346916A (en) * | 2014-11-05 | 2015-02-11 | 北京航天计量测试技术研究所 | Load displacement measuring system based on wireless ad-hoc network |
| CN104422621A (en) * | 2013-09-04 | 2015-03-18 | 北京强度环境研究所 | High-temperature-resistant drop hammer device for testing dynamic response transfer characteristics under thermal environment |
| CN105723204A (en) * | 2013-10-11 | 2016-06-29 | 迪纳泰斯特国际有限公司 | Falling weight deflectometer |
| CN107843486A (en) * | 2017-12-19 | 2018-03-27 | 成都圭目机器人有限公司 | A kind of detection robot system based on benkelman beams deflectometer |
| CN108603823A (en) * | 2015-12-16 | 2018-09-28 | 迪纳泰斯特国际有限公司 | Drop hammer deflection meter |
| CN108867281A (en) * | 2018-07-23 | 2018-11-23 | 四川正达检测技术有限责任公司 | A kind of cement concrete pavement cavity drop hammer deflection meter method for comprehensive detection |
| CN110205907A (en) * | 2019-06-06 | 2019-09-06 | 交通运输部公路科学研究所 | A kind of calculation method of the deformation peak value of impact position under impact load |
-
2006
- 2006-01-16 CN CN 200620068519 patent/CN2856134Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698495A (en) * | 2012-09-28 | 2014-04-02 | 北京航天计量测试技术研究所 | Load transmission capacity measurement device for concrete pavement joint |
| CN104422621A (en) * | 2013-09-04 | 2015-03-18 | 北京强度环境研究所 | High-temperature-resistant drop hammer device for testing dynamic response transfer characteristics under thermal environment |
| CN105723204A (en) * | 2013-10-11 | 2016-06-29 | 迪纳泰斯特国际有限公司 | Falling weight deflectometer |
| CN104346916A (en) * | 2014-11-05 | 2015-02-11 | 北京航天计量测试技术研究所 | Load displacement measuring system based on wireless ad-hoc network |
| CN108603823A (en) * | 2015-12-16 | 2018-09-28 | 迪纳泰斯特国际有限公司 | Drop hammer deflection meter |
| US10823654B2 (en) | 2015-12-16 | 2020-11-03 | Dynatest A/S | Falling weight deflectometer |
| CN107843486A (en) * | 2017-12-19 | 2018-03-27 | 成都圭目机器人有限公司 | A kind of detection robot system based on benkelman beams deflectometer |
| CN108867281A (en) * | 2018-07-23 | 2018-11-23 | 四川正达检测技术有限责任公司 | A kind of cement concrete pavement cavity drop hammer deflection meter method for comprehensive detection |
| CN110205907A (en) * | 2019-06-06 | 2019-09-06 | 交通运输部公路科学研究所 | A kind of calculation method of the deformation peak value of impact position under impact load |
| CN110205907B (en) * | 2019-06-06 | 2021-04-02 | 交通运输部公路科学研究所 | Method for calculating deformation peak value of impact position under impact load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081226 Address after: No. 223 Simon Street, Jiangsu, Nanjing: 210017 Patentee after: Jiangsu Transportation Research Institute Co., Ltd. Address before: No. 223 Simon Street, Jiangsu, Nanjing: 210017 Patentee before: Jiangsu TRI |
|
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU PROVINCE COMMUNICATION SCIENCE RESEARCH IN Free format text: FORMER OWNER: JIANGSU TRAFFIC RESEARCH INSTITUTE CO., LTD. Effective date: 20081226 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Suke Changlian Technology Co., Ltd. Assignor: Jiangsu Transportation Research Institute Co., Ltd. Contract record no.: 2014320000497 Denomination of utility model: Laser calibration device for falling weight deflectometer Granted publication date: 20070110 License type: Common License Record date: 20140618 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070110 |
|
| EXPY | Termination of patent right or utility model |