CN101908259B - Rod axial load overrun prewarning system and method - Google Patents
Rod axial load overrun prewarning system and method Download PDFInfo
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- CN101908259B CN101908259B CN 201010225001 CN201010225001A CN101908259B CN 101908259 B CN101908259 B CN 101908259B CN 201010225001 CN201010225001 CN 201010225001 CN 201010225001 A CN201010225001 A CN 201010225001A CN 101908259 B CN101908259 B CN 101908259B
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Abstract
The invention provides rod axial load overrun prewarning system and method, belonging to the technical field of engineering load measurement. The prewarning system comprises a prewarning signal acquisition device, an acousto-optic warning device, a system working condition display device and a signal analyzing and processing module, wherein the prewarning signal acquisition device, the acousto-optic warning device and the system working condition display device are arranged on a rod, and the signal analyzing and processing module is used for receiving and processing a signal output from the prewarning signal acquisition device and controlling the acousto-optic warning device and the system working condition display device. The prewarning method comprises the steps of: obtaining a stress condition through accurately measuring axial small deformation of the rod, setting a load overrun prewarning value; and when a load is overrun, prewarning the acousto-optic warning device by the signal analyzing and processing module of the system. The invention has the advantages of high measurement accuracy, strong adaptability, convenient use and maintenance and low cost, and can monitor the working condition of the rod in real time, immediately and effectively prewarn the load overrun, ensure the use safety of the rod, and provide guarantee for the life property and safety of the construction site.
Description
Technical field:
The present invention relates to a kind of rod axial load overrun early warning system and method for early warning, belong to construction work load measurement technical field.
Background technology:
Rod member has a wide range of applications in all kinds of engineerings, and the framing scaffold that for example in building installation engineering, uses is formed by connecting through various ways a large amount of steel pipe parts usually.Because scaffolding structure is huge, stress is complicated, and the bar that climbs of the boat scaffold that in construction, uses in local the member overload failure, particularly high-building construction of easy appearance in case fracture will cause whole mould bases tenesmus, causes great security incident.Data shows; In the etesian casualty accident of China building operation system; There is 1/3rd casualty accident relevant with the problem of framing scaffold erecting tools and use thereof directly or indirectly approximately; Thereby should set up practicable security protection system, research and develop corresponding safe early warning equipment, to avoid unnecessary life and property loss.
Summary of the invention
Goal of the invention:
Technical matters to be solved of the present invention is to the defective in the above-mentioned background technology, and a kind of rod axial load overrun early warning system and method for early warning are provided, and avoids the generation of rod member potential safety hazard in all kinds of engineerings.
Technical scheme:
The present invention adopts following technical scheme for realizing the foregoing invention purpose:
A kind of rod axial load overrun early warning system comprises:
Be used to gather the early warning signal harvester of the early warning signal of rod axial load overrun;
Be used to the acoustic-optic alarm that adopts the acousto-optic mode to report to the police;
Be used to show the system health display device of early warning system working condition;
Be used to receive and handle the early warning signal of early warning signal harvester output and control acoustic-optic alarm and the signal analysis and processing module of control system running state display device;
Wherein the output terminal of early warning signal harvester is connected with the signal analysis and processing module input, and the output terminal of signal analysis and processing module is connected with the input end of acoustic-optic alarm, the input end of system health display device respectively.
Further, the early warning signal harvester of above-mentioned rod axial load overrun early warning system comprises ratch strain multiplying arrangement and strain acquirement bar.
Further, the ratch strain multiplying arrangement of above-mentioned rod axial load overrun early warning system comprises measuring staff, tooth bar, in-line gears, pointer gear, pointer, dial plate, transparent watchcase and returning spring; The bottom of said measuring staff links to each other through shaft coupling with the top of strain acquirement bar; The bottom of strain acquirement bar is fixed on the rod member fastener; Can stretch up and down and drive measuring staff and move up and down in the top of strain acquirement bar; Have tooth bar on the measuring staff, the pinion wheel interlock of tooth bar and in-line gears, the pointer gear interlock of the gear wheel of in-line gears and rotating pointer; The surface of ratch strain multiplying arrangement is the dial plate that has scale, and dial plate can rotate around its center; Measuring staff is connected through returning spring with the shell of ratch strain multiplying arrangement.
Further; The transparent watchcase of the ratch strain multiplying arrangement of above-mentioned rod axial load overrun early warning system can rotate around its center; Have an aperture on the transparent watchcase, the aperture internal fixation is provided with a hard contact, and said hard contact does not contact with dial plate; Said hard contact links to each other with the signal analysis and processing module through a lead, and pointer, the other end that an end of another root lead connects ratch strain multiplying arrangement connect the signal analysis and processing module.
Further, the acoustic-optic alarm of above-mentioned rod axial load overrun early warning system adopts audible-visual annunciator.
Further, the system health display device of above-mentioned rod axial load overrun early warning system adopts the led pilot lamp of two kinds of colors, and two kinds of colors are respectively red, green.
Further, the signal analysis and processing module of above-mentioned rod axial load overrun early warning system adopts relay as the major control part.
A kind of rod axial load overrun method for early warning based on above-mentioned rod axial load overrun early warning system comprises the steps:
Steps A, at first the signal analysis and processing module is placed in the control box, secondly the system health display device is installed in the control box surface, afterwards control box, acoustic-optic alarm, early warning signal harvester all are fixed on the rod member through the rod member fastener;
Before step B, early warning system started, the dial plate through rotation ratch strain multiplying arrangement made the zero graduation of dial plate overlap with the projection of pointer, sets the initial value of tested rod member load; Through the transparent watchcase of rotation ratch strain multiplying arrangement, make the projection of the hard contact on the transparent watchcase be positioned at the corresponding scale place of load early warning value of required setting;
Step C, startup early warning system; After early warning system gets into duty, cause the needle deflection of ratch strain multiplying arrangement through the variation of load on the tested rod member, when load increment reaches early warning value; The pointer of ratch strain multiplying arrangement contacts with hard contact on the transparent watchcase; Relay normally open point is closed, and signal analysis and processing module controls running state display device shows red light, starts acoustic-optic alarm simultaneously and carries out early warning.
Beneficial effect:
1, can design large and small gear and the pointer gear of in-line gears, the radius of dial plate according to actual needs, to obtain required precision, measuring accuracy is high.
2, applicability is strong, can set rod axial load initial value and early warning value according to the characteristics and use needs of different rod members.
3, early warning is timely, can monitor the working condition of rod member in real time, and in time the early warning load situation that transfinites guarantees the safe in utilization of rod member, for the security of the lives and property of working-yard provides safeguard.
4, system architecture is simple, easy to operate, with low cost, can be fixed on the rod member or from rod member through the rod member fastener and lay down.The setting that can realize initial value and early warning value through the dial plate and the transparent watchcase of rotation ratch strain multiplying arrangement.
Description of drawings:
Fig. 1 system architecture of the present invention and rod member fastener schematic cross-section.
Fig. 2 ratch strain of the present invention multiplying arrangement structural representation.
The framework synoptic diagram of Fig. 3 system of the present invention.
Fig. 4 circuit theory diagrams of the present invention.
Label among Fig. 1 is explained: 1, rod member, 2, ratch strain multiplying arrangement, 3, the strain acquirement bar, 4, hard contact, 5, the rod member fastener, 6, the signal analysis and processing module, 7, the system health display device, 8, acoustic-optic alarm.
Label among Fig. 2 is explained: 2-1, measuring staff, 2-2, tooth bar, 2-3, in-line gears, 2-4, pointer gear, 2-5, pointer, 2-6, dial plate, 2-7, returning spring, 2-8, transparent watchcase.
Specific embodiments:
Below in conjunction with accompanying drawing the enforcement of technical scheme is done further to describe in detail:
As shown in Figure 1, rod axial load overrun early warning system of the present invention is characterized in that:
Be arranged on the early warning signal harvester on the rod member; Be arranged on the acoustic-optic alarm 8 on the rod member; Be arranged on the system health display device 7 on the rod member; One is used for receiving and handling the early warning signal harvester: the signal analysis and processing module 6 of signal, control acoustic-optic alarm 8 and the control system running state display device 7 of ratch strain multiplying arrangement 2,3 outputs of strain acquirement bar.
Signal analysis and processing module 6 places in the control box, and system health display device 7 is installed in the control box surface, and control box, acoustic-optic alarm 8, early warning signal harvester all are fixed on the rod member 1 through rod member fastener 5.
As shown in Figure 2, rod member fastener 5 is made up of two semicircle steel tanks respectively, and a side is hinged, after opposite side is separated, is buckled on the rod member 1 that needs early warning, again through the screw anchoring, guarantees that rod member fastener 5 and rod member 1 are connected firmly.
As shown in Figure 3, early warning system comprises: early warning signal harvester, acoustic-optic alarm, system health display device, signal analysis and processing module; Wherein the output terminal of early warning signal harvester is connected with the signal analysis and processing module input, and the output terminal of signal analysis and processing module is connected with the input end of acoustic-optic alarm, the input end of system health display device respectively.
The early warning signal harvester is made up of ratch strain multiplying arrangement 2 and strain acquirement bar 3.Ratch strain multiplying arrangement 2 is fixed on the rod member 1 through rod member fastener 5, and the bottom of its measuring staff links to each other through shaft coupling with the top of strain acquirement bar 3, and the bottom of strain acquirement bar 3 is fixed on the rod member fastener 5, and rod member fastener 5 is fixed on the rod member 1.
Ratch strain multiplying arrangement 2 comprises measuring staff 2-1, tooth bar 2-2, in-line gears 2-3, pointer gear 2-4, pointer 2-5, dial plate 2-6, returning spring 2-7 and transparent watchcase 2-8.Measuring staff 2-1 is connected through returning spring 2-7 with the shell of ratch strain multiplying arrangement 2, guarantees that measuring staff 2-1 can in time reset when the xial feed of measured rod member 1 reduces.Have tooth bar 2-2 on the measuring staff 2-1, the pinion wheel interlock of tooth bar 2-2 and in-line gears 2-3, the pointer gear 2-4 interlock of the gear wheel of in-line gears 2-3 and rotating pointer 2-5.When strain acquirement bar 3 collects the stressed variation of measured rod member 1, will stretch up and down and drive measuring staff 2-1 and move up and down in its top, and in-line gears 2-3 also and then rotates together, drive pointer 2-5 deflection through pointer gear 2-4 then.
The transparent watchcase 2-8 of ratch strain multiplying arrangement 2 can rotate around its center, has an aperture on the transparent watchcase 2-8, and hard contact 4 is fixed in the aperture, but does not contact with dial plate 2-6, and hard contact 4 links to each other with signal analysis and processing module 6 through a lead.Other has lead one end to link to each other with the pointer 2-5 of ratch strain multiplying arrangement 2, and the other end links to each other with signal analysis and processing module 6.Before the rod axial load overrun early warning system started, the dial plate 2-6 through rotation ratch strain multiplying arrangement 2 made the zero graduation of dial plate 2-6 overlap with the projection of pointer 2-5, sets the load initial value of tested rod member 1.The reading of pointer 2-5 is corresponding to the axial deformation increment of rod member 1 between two rod member fasteners 5.Through the transparent watchcase 2-8 of rotation ratch strain multiplying arrangement 2, make the projection of hard contact 4 be positioned at the corresponding scale place of load early warning value of required setting.After early warning system gets into duty; The variation of load will cause pointer 2-5 deflection on the tested rod member 1, and when load increment reached early warning value, pointer 2-5 contacted with hard contact 4; The relay K 1 normal closure of making war, signal analysis and processing module 6 starts acoustic-optic alarms 8 and carries out early warning.
The rod axial load overrun early warning system is installed on the rod member 1, and after the energized, system health display device 7 shows green light.Signal analysis and processing module 6 receives the signal that the early warning signal harvester collects, and after handling, in system health display device 7 and acoustic-optic alarm 8, exports the result.When rod member 1 axial load overrun, system health display device 7 shows red light, starts acoustic-optic alarm 8 simultaneously and carries out early warning.
As shown in Figure 4, the rod axial load overrun early warning system circuit theory of present embodiment.Closed S1, energized 1, system gets into duty, and system health display device 7 shows green lights at this moment; When rod member 1 suffered load increment reaches early warning value; The pointer 2-5 of ratch strain multiplying arrangement 2 contacts with hard contact 4, and switch S 2 closures make relay K closed 1 normal battle; System health display device 7 shows red light, starts acoustic-optic alarm 8 simultaneously and carries out early warning.
The concrete course of work of present embodiment is following:
Selecting external diameter for use is that 48mm, wall thickness are the material of the Q235 weldless steel tube of 3.5mm as rod member in the present embodiment 1; Its elastic modulus is 206GPa; The allowable stress value is [σ]=167MPa; Ratch strain multiplying arrangement 2 precision are 0.001mm, and pointer 2-5 rotation 1 circle is 0.2mm corresponding to the axial deformation increment of rod member 1 between two rod member fasteners 5.The centre distance of two rod member fasteners 5 is L
0Be 150mm.
Getting early warning value is 70% of allowable stress value, and then the early warning strain of rod member 1 material therefor is:
[ε]＝[σ]/E＝(167×10
3×70％)/(206×10
6)＝5.6748×10
-4
The early warning of rod member 1 is deformed between two rod member fasteners 5:
[L]＝[ε]×L
0＝5.6748×10
-4×150＝0.085122mm
[L]=0.085122mm＜0.2mm; Promptly when rod member is stressed when reaching alert status; The amplitude of pointer 2-5 rotation can not surpass 1 circle, so the centre distance of two rod member fasteners 5 confirming of present embodiment meets the designing requirement of the material and the ratch strain multiplying arrangement 2 of rod member 1.The dial plate of rotation ratch strain multiplying arrangement 2 places load early warning value place with hard contact 4.
Carried out rod member load early warning test as shown in the table in certain working-yard:
Can know that like institute's column data in the table xial feed of rod member 1,2,3 has surpassed early warning value, system start-up acoustic-optic alarm 8 carries out early warning, and the xial feed of rod member 4,5,6 is in the early warning value scope, and system health display device 7 shows green lights.
Can be known that by present embodiment early warning of the present invention is accurate, equipment work in order.The undeclared part that relates among the present invention is identical with prior art.
Claims (5)
1. a rod axial load overrun early warning system is characterized in that, comprising:
Be used to gather the early warning signal harvester of the early warning signal of rod axial load overrun;
Be used to the acoustic-optic alarm that adopts the acousto-optic mode to report to the police;
Be used to show the system health display device of early warning system working condition;
Be used to receive and handle the early warning signal of early warning signal harvester output and control acoustic-optic alarm and the signal analysis and processing module of control system running state display device;
Wherein the output terminal of early warning signal harvester is connected with the signal analysis and processing module input, and the output terminal of signal analysis and processing module is connected with the input end of acoustic-optic alarm and the input end of system health display device respectively;
Said early warning signal harvester comprises ratch strain multiplying arrangement and strain acquirement bar, and wherein: said ratch strain multiplying arrangement comprises measuring staff, tooth bar, in-line gears, pointer gear, pointer, dial plate, transparent watchcase and returning spring; The bottom of said measuring staff links to each other through shaft coupling with the top of strain acquirement bar; The bottom of strain acquirement bar is fixed on the rod member fastener; Can stretch up and down and drive measuring staff and move up and down in the top of strain acquirement bar; Have tooth bar on the measuring staff, the pinion wheel interlock of tooth bar and in-line gears, the pointer gear interlock of the gear wheel of in-line gears and rotating pointer; The surface of ratch strain multiplying arrangement is the dial plate that has scale, and dial plate can rotate around its center; Measuring staff is connected through returning spring with the shell of ratch strain multiplying arrangement;
The transparent watchcase of said ratch strain multiplying arrangement can rotate around its center; Have an aperture on the transparent watchcase; The aperture internal fixation is provided with a hard contact; Said hard contact does not contact with dial plate, and the end of said hard contact links to each other with the signal analysis and processing module through a lead, and pointer, the other end that other has an end of a lead to connect ratch strain multiplying arrangement connect the signal analysis and processing module.
2. rod axial load overrun early warning system according to claim 1 is characterized in that: said acoustic-optic alarm adopts audible-visual annunciator.
3. rod axial load overrun early warning system according to claim 1 is characterized in that: said system health display device adopts the led pilot lamp of two kinds of colors, and two kinds of colors are respectively red, green.
4. rod axial load overrun early warning system according to claim 1 is characterized in that: said signal analysis and processing module adopts relay as the major control part.
5. the rod axial load overrun method for early warning based on any described rod axial load overrun early warning system of claim 1 to 4 is characterized in that: comprise the steps:
Steps A, at first the signal analysis and processing module is placed in the control box, secondly the system health display device is installed in the control box surface, afterwards control box, acoustic-optic alarm, early warning signal harvester all are fixed on the rod member through the rod member fastener;
Before step B, early warning system started, the dial plate through rotation ratch strain multiplying arrangement made the zero graduation of dial plate overlap with the projection of pointer, sets the initial value of tested rod member load; Through the transparent watchcase of rotation ratch strain multiplying arrangement, make the projection of the hard contact on the transparent watchcase be positioned at the corresponding scale place of load early warning value of required setting;
Step C, startup early warning system; After early warning system gets into duty, cause the needle deflection of ratch strain multiplying arrangement through the variation of load on the tested rod member, when load increment reaches early warning value; The pointer of ratch strain multiplying arrangement contacts with hard contact on the transparent watchcase; Relay normally open point is closed, and signal analysis and processing module controls running state display device shows red light, starts acoustic-optic alarm simultaneously and carries out early warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010225001 CN101908259B (en) | 2010-07-13 | 2010-07-13 | Rod axial load overrun prewarning system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010225001 CN101908259B (en) | 2010-07-13 | 2010-07-13 | Rod axial load overrun prewarning system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101908259A CN101908259A (en) | 2010-12-08 |
| CN101908259B true CN101908259B (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010225001 Expired - Fee Related CN101908259B (en) | 2010-07-13 | 2010-07-13 | Rod axial load overrun prewarning system and method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103247145B (en) * | 2013-04-24 | 2015-01-07 | 浙江自力建设集团有限公司 | Fastener slipping monitoring and early warning device for fastener-type steel tube formwork |
| CN113340344B (en) * | 2021-05-27 | 2023-03-24 | 中国建筑第四工程局有限公司 | Hydraulic climbing mould intelligent monitoring control early warning system based on digital twin technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038218A (en) * | 2006-03-17 | 2007-09-19 | 许楠 | Small cantilever beam type walking beam micro-deformation measuring device |
| CN201346965Y (en) * | 2009-01-05 | 2009-11-18 | 中国汽车工程研究院有限公司 | Spanning seat type single-rail train tire pressure monitoring gauge |
| CN101603864A (en) * | 2009-06-01 | 2009-12-16 | 中国建筑第八工程局有限公司 | A kind of method for monitoring axial force of scaffold upright rod |
| CN201417187Y (en) * | 2009-03-18 | 2010-03-03 | 东莞市坚朗五金制品有限公司 | Rod-cable force measurer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0329825A (en) * | 1989-06-28 | 1991-02-07 | Mitsubishi Heavy Ind Ltd | Detecting method of stress of reinforcing rod of existing structure |
| US7589640B2 (en) * | 2005-01-28 | 2009-09-15 | Dennis Lee Bell | Utility pole and tower safety and protection device |
-
2010
- 2010-07-13 CN CN 201010225001 patent/CN101908259B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038218A (en) * | 2006-03-17 | 2007-09-19 | 许楠 | Small cantilever beam type walking beam micro-deformation measuring device |
| CN201346965Y (en) * | 2009-01-05 | 2009-11-18 | 中国汽车工程研究院有限公司 | Spanning seat type single-rail train tire pressure monitoring gauge |
| CN201417187Y (en) * | 2009-03-18 | 2010-03-03 | 东莞市坚朗五金制品有限公司 | Rod-cable force measurer |
| CN101603864A (en) * | 2009-06-01 | 2009-12-16 | 中国建筑第八工程局有限公司 | A kind of method for monitoring axial force of scaffold upright rod |
Non-Patent Citations (1)
| Title |
|---|
| JP平3-29825A 1991.02.07 |
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