CN202388617U - Intelligent stretch-draw control device of prestressing force of fiber bragg grating precast beam - Google Patents
Intelligent stretch-draw control device of prestressing force of fiber bragg grating precast beam Download PDFInfo
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- CN202388617U CN202388617U CN 201120408164 CN201120408164U CN202388617U CN 202388617 U CN202388617 U CN 202388617U CN 201120408164 CN201120408164 CN 201120408164 CN 201120408164 U CN201120408164 U CN 201120408164U CN 202388617 U CN202388617 U CN 202388617U
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Abstract
The utility model relates to an intelligent stretch-draw control device of a prestressing force of a fiber bragg grating precast beam. The intelligent stretch-draw control device comprises stretch-draw devices and a computer console, wherein the computer console comprises a computer, a wireless module and a console antenna; two sets of stretch-draw devices with the same structure are symmetrically arranged; each stretch-draw device comprises a hydraulic device and a jack device; the hydraulic device comprises an oil tank, a motor hydraulic pump assembly, a valve block assembly, a control panel, an antenna and a signal processing control unit; the jack device comprises a jack, a fiber bragg grating displacement sensor and a connector; the valve block assembly comprises a pressure sensor and the like, the fiber bragg grating displacement sensor is connected with the valve block assembly through an oil tube, and the influence of the vibration produced during working of a motor oil pump to the pressure sensor is prevented by adopting a vibration-preventing installing measure. According to the intelligent stretch-draw control device, the prestressing stretch-draw project of construction of the precast beam is fully-automatically completed, data can be stored and transmitted, the stretch-draw result data is automatically uploaded to the remote server, and truth of the data is ensured.
Description
Technical field
The utility model relates to a kind of fiber grating precast beam prestressing force intelligence stretching controlling device.
Background technology
Precast beam bears and it is applied prestressing force before the external applied load, can improve the rigidity of precast beam, postpones the time that the crack occurs, so the precast beam pre-stress construction is the critical process that guarantees structural safety and durability, is the lifeline of structural safety.At present, the traditional precast beam two ends stretch-draw of China is by control manually, and artificial stretching mode is the elongation that removes to measure presstressed reinforcing steel through steel ruler; Through mechanical pressure gauge read pressure values; It is bigger that these are influenced by the precision of instrument all, and to grasp level closely bound up with the workman, has influence on the accuracy of reading; Cause error bigger, and can cause the compressor wire discontinuity; The mode of artificial stretch-draw is bigger to the control randomness of the point that pauses, and also very inaccurate to the control of stretching force value, sync rates is low; In addition, data form is filled in manual work, can not avoid artificial modification, and it is qualified that underproof data are become.Above various reasons directly has influence on the stretch-draw quality, influences the service life and the safety assurance of architectural engineerings such as bridge, increases the maintenance and the operation costs in architectural engineering later stage.
Also there is at present the stretch-draw appearance of automatic control to occur, but do not stop the unfavorable factor of artificial stretch-draw fully, image data is kept at this locality, can not guarantee that data are not modified such as the equipment that has; The convenience of the equipment operation that has is not high, and workman's specification requirement is improved; The Equipment Control that has is low than ability, and the stretch-draw precision is not enough etc.
Chinese patent CN201010620473.3 discloses a kind of automatic tensioning equipment; Because the electric hydaulic oil pump can produce strong electromagnetic interference when work; The data acquisition of the electrical sensor that this electromagnetic interference has influence on this equipment easily and adopted, thus its precision influenced; Though leave network interface in addition, be kept at this locality to the stretch-draw data, can not fundamentally avoid artificially changing the possibility of data.
By on can find out; Press for a kind of new prestressing stretching technique scheme that provides; It adopts the very strong Fibre Optical Sensor of interference free performance, by the software control of computer, and can full automatic completion relevant prestressed stretch-draw; And the ability transmitting data in real time is stopped artificial cheating fully to remote data base.
Summary of the invention
The purpose of the utility model provides a kind of fiber grating precast beam prestressing force intelligence stretching controlling device, can overcome the defective of prior art, realizes the prestressed stretch-draw project in the full automatic completion precast beam work progress, and can preserve and transmit data.
The fiber grating precast beam prestressing force intelligence stretching controlling device that the utility model provides comprises: tensioning equipment and computer console, the two cover tensioning equipment symmetric arrangement that structure is identical.
Said tensioning equipment comprises: hydraulic means and jack device;
Said hydraulic means comprises fuel tank, motor hydraulic pump assembly, valve block assembly, control panel, antenna, signal processing control unit; Motor hydraulic pump assembly links to each other with jack with oil return pipe through the oil inlet pipe that is connected on the valve block assembly, for jack provides prestressed stretch-draw and returns back to top required pressure.Said valve block assembly is installed on the fuel tank casing.Said antenna is connected to signal processing control unit.
Said jack device comprises jack, fiber grating displacement sensor and connector.Said fiber grating displacement sensor is installed on the shell of jack, and its displacement measurement spring links to each other with connector.Said connector links to each other with the piston of jack, and the connector that moves through of jack piston is detected by displacement transducer.Fiber bragg grating pressure sensor is connected on the valve block assembly through oil pipe, and taking shockproof installation measure, the pressure signal that is detected is sent to fiber grating displacement sensor through sensor fiber, closes the road with displacement signal.Said fiber grating displacement sensor and fiber bragg grating pressure sensor are optical pickocff.
Said connector comprises sheet metal plate, Metallic rod, sleeve pipe.Have two circular holes on the sheet metal plate, one links to each other with the spring of displacement transducer, and another links to each other with Metallic rod, and sheet metal plate is a circular arc, inserts in the cannelure of jack piston.Metallic rod is inserted in the sleeve pipe that is fixed on the jack surface, and can slide.
Said valve block assembly comprises oil circuit, valve piece the 4th interior oil circuit, pressure sensor oil pipe in oil circuit in oil pump overflow valve, solenoid electric valve, choke valve, fiber bragg grating pressure sensor, pressure sensor optical fiber, Pressure gauge, the valve piece first, the valve piece second interior oil circuit, oil return overflow valve, the valve piece the 3rd.Said solenoid electric valve is installed on the choke valve, and choke valve is fixed on the valve block assembly valve body.Said overflow valve, oil return overflow valve are installed on the valve block assembly valve body.Said fiber bragg grating pressure sensor is connected on the valve block assembly valve body through the pressure sensor oil pipe.Said pressure sensor optical fiber links to each other with the second displacement transducer optical fiber.Said Pressure gauge is connected on the valve block assembly valve body through high-pressure oil pipe.
The fiber bragg grating pressure sensor of said valve block assembly, Pressure gauge on oil circuit with valve piece first in oil circuit communicate, the oil return overflow valve on oil circuit with valve piece second in oil circuit communicate, the oil pump overflow valve on oil circuit with valve piece the 4th in oil circuit communicate; Oil circuit is opened on valve piece first hydraulic fluid port in the said valve piece first, and oil circuit is opened on valve piece second hydraulic fluid port in the valve piece second.
Said fiber bragg grating pressure sensor is connected to the valve block assembly through oil pipe, and the long 30-50cm of oil pipe is provided with some annulus hitch points outside oil pipe, be lifted on the outer casing inner wall of hydraulic means through rope sling on the hitch point.The vibration that produces when preventing motor pump work has like this been stablized the data output of sensor to the influence of fiber bragg grating pressure sensor.
Said computer console comprises notebook computer, wireless module and console antenna.Stretch-draw control software is installed in the notebook computer.The notebook computer of said computer console links to each other through serial interface cable with wireless module.The function of wireless module is to realize the exchanges data of notebook computer and hydraulic means through the console antenna, and sensing data is further handled in computer, and on software interface, shows, realizes supervision and control to stretching process.Wireless module is also realized telecommunications functions, and final stretch-draw result data can be uploaded to the remote server end automatically, avoids artificial change fully.
The step that the implementation method of the fiber grating precast beam prestressing force intelligence stretching controlling device that the utility model provides comprises:
The displacement data of jack tension of 1) measuring via the fiber grating displacement sensor that is installed on the jack and the piston that produced of returning back to top; And the real-time pressure data of oil pump during the stretch-draw operation of measuring via the fiber bragg grating pressure sensor that is installed on the valve block assembly simultaneously, then be sent to signal processing control unit with displacement data and pressure data are synthetic through optical fiber;
2) signal processing control unit converts the data that receive into the signal of telecommunication, and it is analyzed and handles, and the data of putting in order are sent to computer console through wireless or wired mode; The instruction that while receiving computer console sends; Signal processing control unit control magnetic valve is opened and switching-over, the work of control tensioning equipment.
3) computer console receives the data that signal processing control unit sends, and it is handled again, and show in real time; Computer console is according to the data that receive; Send command adapted thereto after the analysis and judgement in real time to signal processing control unit; Magnetic valve through being installed on the valve block assembly is controlled and the start and stop of adjusting stretch-draw in real time, stress, pause point time etc.; Adjustment stretch-draw process to reach best stretch-draw effect, guarantees the stretch-draw quality.
4) after a stretching process is accomplished; Stretch-draw control software meeting storing data automatically, and, be sent to remote server through wireless mode with the data packing; Remote server inserts the internet; Can be positioned at anywhere, administrative staff just can check the stretch-draw data through access server, have so fundamentally guaranteed the authenticity of data.
The utility model provides a kind of fiber grating precast beam prestressing force intelligence stretching controlling device to merge modern optical fiber sensing technology, digital control technology, the information processing technology etc.; Can accurately control the prestressed power value and the uniformity; Realize automation need not artificial reading and measurement at stretching process, not influenced by extraneous factor such as artificial, environment; Realize synchronous tension, standard stretching process; The inexactness, the randomness that efficiently solve the girder pre-stressed artificial method for stretching existence of traditional axle are revised problems such as data greatly and artificially, have really eliminated hidden danger, have guaranteed the stretching construction quality.Simultaneously, lotus time, loading speed are held in the strict control of intelligent stretch-draw appearance, and stretching process is carried out overall process quality management, monitoring, error correction in real time, can analyze the stretching construction quality, early warning, assessment, have effectively improved the construction quality management work efficiency.Prestressed stretch-draw project in can full automatic completion precast beam work progress, and can preserve and transmit data.The utility model also has good in anti-interference performance, high, good, the stretch-draw precision advantages of higher of net synchronization capability of automaticity.
Description of drawings
Fig. 1 is the tensioning equipment structural representation of the utility model; Fig. 2 is the computer console of the utility model.
Fig. 3 is the asphalt principle sketch map of valve block assembly; Fig. 4 is that the structure of valve block assembly is formed.
Fig. 5 is the connector installation structure sketch map; Fig. 6 is that the A-A of Fig. 5 is to sectional view; Fig. 7 is that the B-B of Fig. 5 is to sectional view.
Fig. 8 stretch-draw control running software flow chart.
The specific embodiment
The specific embodiments of the utility model specifies as follows with reference to accompanying drawing, but for illustrative purposes only rather than limit the utility model.The utility model uses device to be the commercially available prod, and the device that satisfies the performance indications requirement of the utility model all can use.
As shown in the figure, 1, fuel tank; 2, motor hydraulic pump; 3, valve block assembly; 4, control panel; 5, antenna; 6, signal processing control unit; 7, valve piece first hydraulic fluid port; 8, valve piece second hydraulic fluid port; 9, oil level temperature indicator; 10, oil inlet pipe; 11, oil return pipe; 12, jack; 13, jack piston; 14, jack oil-in; 15, jack oil return opening; 16, fiber grating displacement sensor; 17, connector; 18, the first displacement transducer optical fiber; 19, the second displacement transducer optical fiber; 20, computer console; 21, wireless module; 22, console antenna; Shell 23.
301, oil pump overflow valve; 302 solenoid electric valves; 303, choke valve; 304, fiber bragg grating pressure sensor; 305, pressure sensor optical fiber; 306, Pressure gauge; 307, oil circuit in the valve piece first; 308, oil circuit in the valve piece second; 309, oil return overflow valve; 310, oil circuit in the valve piece the 3rd; 311, oil circuit in the valve piece the 4th; 312, pressure sensor oil pipe.
701, jack; 702, sensor mount; 703, displacement transducer; 704, sleeve pipe; 705, Metallic rod; 706, spring; 707, sheet metal plate; 708, nut; 709, piston; 710, cannelure; 711, indent circular arc.
The utility model fiber grating prestressing force intelligent synchronization stretch-draw control system comprises: tensioning equipment and computer console, the two cover tensioning equipment symmetric arrangement that structure is identical.Tensioning equipment comprises hydraulic means and jack device; Hydraulic means comprises fuel tank 1, motor hydraulic pump 2, valve block assembly 3, control panel 4, antenna 5, signal processing control unit 6; Motor hydraulic pump 2 links to each other with jack 12 with oil return pipe 11 through the oil inlet pipe 10 that is connected on the valve block assembly 3, for jack provides prestressed stretch-draw and returns back to top required pressure.Valve block assembly 3 is installed on fuel tank 1 casing.Said antenna 5 is connected to signal processing control unit 6.
Jack device comprises jack 12, fiber grating displacement sensor 16 and connector 17.Fiber grating displacement sensor 16 is installed on the shell of jack 12, and its displacement measurement spring links to each other with connector 17.Connector 17 links to each other with the piston of jack 12.Fiber grating displacement sensor 16 is an optical pickocff with fiber bragg grating pressure sensor 34, and the connector 17 that moves through of jack piston is detected by displacement transducer.Connector 17 comprises sheet metal plate 707, Metallic rod 705, sleeve pipe 704.Sheet metal plate has certain thickness, near its upper end two circular holes is arranged, a spring that is used for connecting displacement transducer, and another connects a Metallic rod, and it is fixing that the two all passes through nut 708.Metallic rod is inserted in the sleeve pipe that is fixed on the jack surface, and Metallic rod can be slided in sleeve pipe.The sheet metal plate lower end is an indent circular arc, inserts in the ring shaped slot of jack circular piston, remains contact.Guaranteed that like this sheet metal plate can only move axially along jack, and can not move left and right.When piston was flexible, sheet metal plate drives the displacement transducer spring and Metallic rod moves with piston; When piston rotated, sheet metal plate was slided in ring shaped slot under the effect of Metallic rod, made its left and right sides invariant position, thereby the measuring spring of displacement transducer is not bent, and had guaranteed certainty of measurement.
Fiber bragg grating pressure sensor 304 is connected on the valve block assembly through oil pipe 312; In system, adopt soft contact to install; Suspension fiber bragg grating pressure sensor 304 carries out shockproof processing; The pressure signal that is detected is sent to fiber grating displacement sensor 16 through sensor fiber 305, closes the road with displacement signal.
Described fiber grating displacement sensor and fiber bragg grating pressure sensor are optical pickocff, and the used fiber grating of sensor is a bragg grating, and wavelength is positioned at C-band.The range of fiber grating displacement sensor is 200mm, and resolution ratio is 0.5% (full scale), and operating temperature is-30 ℃-80 ℃ (for example selecting model for use is the fiber grating displacement sensor of FBGD10011); The range of fiber bragg grating pressure sensor is 60MPa, and resolution ratio is 0.5% (full scale), and operating temperature is-30 ℃-80 ℃ (for example selecting model for use is the FBGP070011 fiber bragg grating pressure sensor).
The fiber bragg grating pressure sensor 304 of said valve block assembly 3, Pressure gauge 306 on oil circuit with valve piece first in oil circuit 307 communicate; Oil return overflow valve 309 on oil circuit with valve piece second in oil circuit 308 communicate, oil pump overflow valve 301 on oil circuit with valve piece the 4th in oil circuit 311 communicate; Oil circuit 37 is opened on valve piece first hydraulic fluid port 7 in the said valve piece first, and oil circuit 308 is opened on valve piece second hydraulic fluid port 8 in the valve piece second.
Said fiber bragg grating pressure sensor 304 is connected to valve block assembly 3 via pressure sensor oil pipe 312; Specifically be oil pipe (outside) be provided with some annulus hitch points on (oil pipe length can be 30-50cm) in the length range; On the inwall of the shell 23 that is lifted on hydraulic means on the hitch point through rope sling, be called the shockproof mounting means of " being flexible coupling ".
Computer console comprises notebook computer 20, wireless module 21 and console antenna 22.Stretch-draw control software is installed in the notebook computer.The notebook computer 20 of computer console and wireless module 21 link to each other through serial interface cable.The function of wireless module 21 is to realize the exchanges data of notebook computer and hydraulic means through console antenna 22, and sensing data is further handled in computer, and on software interface, shows, realizes supervision and control to stretching process.Wireless module 21 is also realized telecommunications functions, and final stretch-draw result data can be uploaded to the remote server end automatically, avoids artificial change fully.
The step that the implementation method of the fiber grating precast beam prestressing force intelligence stretching controlling device of the utility model comprises:
The displacement data of jack tension of 1) measuring via the fiber grating displacement sensor that is installed on the jack and the piston that produced of returning back to top; And the real-time pressure data of oil pump during the stretch-draw operation of measuring via the fiber bragg grating pressure sensor that is installed on the valve block assembly simultaneously, then be sent to signal processing control unit with displacement data and pressure data are synthetic through optical fiber.
Motor hydraulic pump 2 produces the required pressure of stretch-draw, is delivered in the jack through valve block assembly 3, oil inlet pipe 10 and oil return pipe 11, promotes the jack pair presstressed reinforcing steel and produces pulling force and return back to top.The displacement of jack piston is sent to signal processing control unit 6 through optical fiber with data when being installed on the fiber grating displacement sensor 16 measurement stretch-draw operations on the jack.The real-time pressure of oil pump when being connected in the fiber bragg grating pressure sensor 304 measurement stretch-draw operations on the valve block assembly; And link to each other with fiber grating displacement sensor 16 through optical fiber; Final and the fiber grating displacement sensor 16 measured displacement datas that obtain synthesize, and data are sent to signal processing control unit 6.
Fiber bragg grating pressure sensor 304, Pressure gauge 306 are connected on the valve piece first interior oil circuit 307, the measurement of the real-time pressure values when they accomplish the stretch-draw operation respectively and demonstration.Oil pump overflow valve 301 is connected on valve piece the 4th interior oil circuit 311, and adjustment oil pump overflow valve 301 is used for controlling the highest pressure of oil pump output.Oil return overflow valve 309 is connected on the valve piece second interior oil circuit 308, the highest pressure when being used for adjusting oil return.
2) signal processing control unit 6 is the signal of telecommunication with the data transaction that receives, and it is analyzed and handles, and the data of putting in order are sent to computer console through wireless or wired mode; The instruction that while receiving computer console sends; Signal processing control unit control magnetic valve is opened and switching-over, the work of control tensioning equipment.Adopt wireless mode to communicate by letter between signal processing control unit 6 and the computer console, can adapt to various applied environment, do not receive the restriction of precast beam length and position, the convenience, the adaptability that are used in raising equipment are arranged.
3) computer console receives the data that signal processing control unit 6 sends; It is handled again; And issue instructions to signal processing control unit in real time according to actual conditions, and control with the startup of adjustment stretch-draw in real time, should end, pause the some time etc. through being installed on magnetic valve on the valve block assembly, adjust the stretch-draw process; To reach best stretch-draw effect, guarantee the stretch-draw quality.
4) after a stretching process is accomplished; Stretch-draw control software also can be sent to remote server through wireless mode automatically with the data packing except data are preserved; Remote server inserts the internet; Can be positioned at anywhere, administrative staff just can check the stretch-draw data through access server, have so fundamentally guaranteed the authenticity of data.
The stretch-draw control running software step of the utility model:
1) input stretch-draw engineering information like engineering name, bid section, unit in charge of construction, supervisor etc., and is gathered tension technology person, is managed personnel's image information.
2) sensor is calibrated.
3) the input necessary data at next interface, like stretch-draw beam number, position, hole, and theoretical stress value, theoretical shift value etc.
4) through stretch-draw control software startup stretch-draw action.
5) if equipment is in proper working order, system can control stretching process and automatically accomplish, and generates form.
6) if control command and detect data exception, software can alarm, pending fault is got rid of.
The notebook computer 20 that links to each other with wireless module 21 through the serial ports cable moves above-mentioned control software; Operating personnel can control software interface in stretch-draw; Input stretch-draw information and necessary data; Like stretch-draw beam number, position, hole, and theoretical stress value, theoretical shift value etc., then through stretch-draw control software startup stretch-draw action.The control information meeting sends to signal processing control unit 6 through the wireless module that is connected to computer, thus the control tensioning equipment.Computer console receives the variation of the stretch-draw displacement that signal processing control unit 6 sends in real time to be changed with oil pressure in real time, and according to above-mentioned variation, in time sends instruction automatically, adjustment stretch-draw process.Notebook computer 20 can be controlled software through stretch-draw and realize that data wireless is uploaded to remote server.After a stretching process is accomplished; Stretch-draw control software can be packed data automatically; Be sent to remote server through wireless mode, remote server inserts the internet, can be positioned at anywhere; Administrative staff just can check the stretch-draw data through access server, have so fundamentally guaranteed the authenticity of data.
Application example
The fiber grating precast beam prestressing force intelligence stretching controlling device of the utility model is in practice of construction is used; The tensioning equipment that the same structure of two covers is formed is symmetrically arranged in the two ends of precast beam; Two jack are installed on respectively on the same group of presstressed reinforcing steel at precast beam two ends, and are connected to respectively on the hydraulic means of same end through high-pressure oil pipe.Said computer console is positioned at comparatively safe area, controls two ends tensioning equipment work simultaneously, and the two ends measurement data all is sent to computer console, by computer Recognition and processing after signal processing control unit conversion and preliminary treatment.
Use the fiber grating prestressing force intelligent synchronization stretching controlling device of the utility model; One group of 4 presstressed reinforcing steel to the prefabricated case beam of a 30m carry out the stretch-draw operation, and the design pressure values of prefabricated case beam is 14.2MPa, and theoretical elongation is 166mm; The stretch-draw result is for when pressure values is 14.2MPa; Actual elongation is 170mm, and error is 2.4%, meets-6% to+6% stretching construction requirement.
The outstanding feature of the utility model is to adopt fiber-optic grating sensor to measure elongation and pressure; Fundamentally resisted motor pump and when work, can produce of the influence of the electromagnetic interference of the strong electromagnetic interference and the environment that comes from the outside, thereby guaranteed its certainty of measurement measurement data.In order to resist the vibrations of motor pump assembly, fiber bragg grating pressure sensor takes to hang shockproof mounting means (" being flexible coupling ").Computer console can also be realized the wireless remote data base that is uploaded to of data in real time, thoroughly guarantees the authenticity of data.The utlity model has good in anti-interference performance, high, good, the stretch-draw precision advantages of higher of net synchronization capability of automaticity.
Claims (8)
1. a fiber grating precast beam prestressing force intelligence stretching controlling device is characterized in that it comprises tensioning equipment and computer console, the two cover tensioning equipment symmetric arrangement that structure is identical; Described tensioning equipment comprises hydraulic means and jack device;
Said hydraulic means comprises fuel tank, motor hydraulic pump assembly, valve block assembly, control panel, antenna, signal processing control unit; Motor hydraulic pump assembly links to each other with jack with oil return pipe through the oil inlet pipe that is connected on the valve block assembly;
Described valve block assembly is installed on the fuel tank casing; Said antenna is connected to signal processing control unit;
Described jack device comprises jack, fiber grating displacement sensor and connector, and fiber grating displacement sensor is installed on the shell of jack, and its displacement measurement spring links to each other with connector, and connector links to each other with the piston of jack;
Described valve block assembly comprises oil circuit, valve piece the 4th interior oil circuit, pressure sensor oil pipe in oil circuit in oil pump overflow valve, solenoid electric valve, choke valve, fiber bragg grating pressure sensor, pressure sensor optical fiber, Pressure gauge, the valve piece first, the valve piece second interior oil circuit, oil return overflow valve, the valve piece the 3rd; Solenoid electric valve is installed on the choke valve, and choke valve is fixed on the valve block assembly valve body; Said overflow valve, oil return overflow valve are installed on the valve block assembly valve body; Fiber bragg grating pressure sensor is connected on the valve block assembly valve body via the pressure sensor oil pipe; The fiber bragg grating pressure sensor of said valve block assembly, Pressure gauge on oil circuit with valve piece first in oil circuit communicate, the oil return overflow valve on oil circuit with valve piece second in oil circuit communicate, the oil pump overflow valve on oil circuit with valve piece the 4th in oil circuit communicate; Oil circuit is opened on valve piece first hydraulic fluid port in the described valve piece first, and oil circuit is opened on valve piece second hydraulic fluid port in the valve piece second;
Described computer console comprises notebook computer, wireless module and console antenna, and the notebook computer of computer console links to each other through serial interface cable with wireless module.
2. device according to claim 1 is characterized in that: described pressure sensor optical fiber links to each other with the second displacement transducer optical fiber; Pressure gauge is connected on the valve block assembly valve body through high-pressure oil pipe.
3. device according to claim 1 is characterized in that: described fiber grating displacement sensor and fiber bragg grating pressure sensor are optical pickocff, and what this fiber grating adopted is bragg grating, and wavelength is positioned at C-band.
4. device according to claim 1 is characterized in that: said fiber bragg grating pressure sensor is connected to the valve block assembly via oil pipe, outside oil pipe, is provided with some annulus hitch points, is being lifted on the outer casing inner wall of hydraulic means through rope sling on the hitch point.
5. device according to claim 1 is characterized in that: the range of said displacement transducer is 200mm.
6. device according to claim 1 is characterized in that: the range of said pressure sensor is 60MPa.
7. device according to claim 1 is characterized in that: said signal processing control unit links to each other with computer console through wireless mode.
8. device according to claim 1; It is characterized in that: said connector comprises sheet metal plate, Metallic rod, sleeve pipe; Have two circular holes on the sheet metal plate, one links to each other with the spring of displacement transducer, and another links to each other with Metallic rod; Sheet metal plate is a circular arc, inserts in the cannelure of jack piston; Metallic rod is inserted in the sleeve pipe that is fixed on the jack surface, and can slide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120408164 CN202388617U (en) | 2011-10-25 | 2011-10-25 | Intelligent stretch-draw control device of prestressing force of fiber bragg grating precast beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120408164 CN202388617U (en) | 2011-10-25 | 2011-10-25 | Intelligent stretch-draw control device of prestressing force of fiber bragg grating precast beam |
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| Publication Number | Publication Date |
|---|---|
| CN202388617U true CN202388617U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120408164 Withdrawn - After Issue CN202388617U (en) | 2011-10-25 | 2011-10-25 | Intelligent stretch-draw control device of prestressing force of fiber bragg grating precast beam |
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| CN (1) | CN202388617U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431090A (en) * | 2011-10-25 | 2012-05-02 | 南开大学滨海学院 | Fiber grating precast beam prestress intelligent tensioning control system and implementation method thereof |
| CN102854064A (en) * | 2012-09-29 | 2013-01-02 | 山东大学 | Numerically-controlled tension test system for soil body and test method for same |
-
2011
- 2011-10-25 CN CN 201120408164 patent/CN202388617U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431090A (en) * | 2011-10-25 | 2012-05-02 | 南开大学滨海学院 | Fiber grating precast beam prestress intelligent tensioning control system and implementation method thereof |
| CN102431090B (en) * | 2011-10-25 | 2014-02-19 | 南开大学滨海学院 | Fiber grating precast beam prestress intelligent tensioning control system and implementation method thereof |
| CN102854064A (en) * | 2012-09-29 | 2013-01-02 | 山东大学 | Numerically-controlled tension test system for soil body and test method for same |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120822 Effective date of abandoning: 20140219 |
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| RGAV | Abandon patent right to avoid regrant |