CN105067166A - Sleeve type force transducer for support structures - Google Patents
Sleeve type force transducer for support structures Download PDFInfo
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- CN105067166A CN105067166A CN201510450733.XA CN201510450733A CN105067166A CN 105067166 A CN105067166 A CN 105067166A CN 201510450733 A CN201510450733 A CN 201510450733A CN 105067166 A CN105067166 A CN 105067166A
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- elastic element
- resistance strain
- trip bolt
- flexible member
- protective shell
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Abstract
Provided is a sleeve type force transducer for support structures. An elastic element and a protective shell are of a sleeve structure. The elastic element is nested in the protective shell, and the elastic element and the protective shell are fastened and connected symmetrically along the circumferences of the elastic element and the protective shell by a first lateral fastening screw, a second lateral fastening screw, a third lateral fastening screw, and a fourth lateral fastening screw. The elastic element is made of alloy structural steel 40CrNiMoA. A first resistance strain gauge and a second resistance strain gauge are symmetrically pasted to the surface of the elastic element by glue water, are used to sense deformation of the elastic element, and can effectively eliminate the influence of bending moment. A fixed joint is connected and fixed to the outer surface of the protective shell through threaded fit. The force transducer is arranged at a support structure scene in a distributed manner base on a wireless sensor network technology, can be used to monitor the force borne by a vertical rod of a support structure, and has great application value and potential.
Description
Technical field
The present invention relates to a kind of telescopic force cell for supporting structure, belong to field of sensing technologies, can realize monitoring the pressure of supporting structure vertical rod.
Background technology
Along with the fast development of economy, road and bridge development is rapid.Construction of cast-in-situ box-beam method, as common construction method a kind of in road and bridge construction, is used widely in Practical Project.Construction of cast-in-situ box-beam method has saving falsework, reduces labour intensity, also shortens the duration simultaneously, accelerates the advantages such as speed of application.Supporting structure belongs to the provisional building structure of road and bridge construction engineering, have dismounting flexibly, convenient in carrying, safeguard the features such as simple, certainly, in cast-in-situ concrete continuous box beam work progress, the high-rise supporting structure of large area is in guarantee construction speed and solve in construction difficult problem, has played irreplaceable effect.
Although construction bracket is temporary structure, be also simultaneously the main support structure in the construction of support cast-in-place method, the intensity of support, rigidity, stability and distortion directly have influence on quality and the security of bridge.For a long time, the design of support does not cause the attention of people, is in most cases to set up according to the experience of workmen.Just because of support, there is the features such as the mode of setting up is various, uncertain factor is numerous, bearing load is comparatively large, the theory of computation is not perfect, about have 1/4th relevant with the inefficacy of support in construction industry accident, cause very large loss to the country and people's lives and properties.
Along with the fast development of supporting structure application, the cave-in accident caused due to supporting structure unstability also becomes ascendant trend year by year.In recent years, the Important Project accidents such as bridge construction medium-height trestle repeatedly occurs in some areas, formwork-support collapses, caused painful injures and deaths and the massive losses of property.
Quality is the life of engineering, and in-service test monitoring is the important means of engineering quality control.Strengthen the quality monitoring of the work progress medium-height trestle structures such as road and bridge, give full play to its vital role in construction safety and quality control, evaluation, become the important content of road and bridge engineering quality safety comprehensive supervision.The domestic construction Supervision to supporting structure, in-service monitoring, detection means are very limited at present, the traditional measuring tools such as transit, tape measure, torque spanner and angle square that lean on are inspected by random samples more, are often difficult to meet quick, comprehensive, the real-time testing requirement of engineering reality.In order to ensure the personal safety of road and bridge engineering workmen further, improve the construction quality of road and bridge engineering, the demand that the present invention monitors according to science of bridge building medium-height trestle, devises a kind of telescopic force cell being exclusively used in supporting structure, the force-bearing situation of monitoring supporting structure vertical rod.
The principle of work of force cell mainly contains resistance-strain type, differential transformation type, condenser type, piezomagnetic, piezoelectric type and type vibration wire etc.Advantages such as wherein, resistance-strain type of dynamometer sensor is the class sensor that at present application is wider, and, stable performance wide with its measurement range, frequency response characteristic are good and enjoy the favor of every profession and trade.Resistance-strain type of dynamometer sensor is mainly based on such principle: elastic body (flexible member) outside masterpiece is used in generation elastic deformation, make the resistance strain gage (conversion element) being pasted onto surface also in company with producing distortion, after resistance strain gage distortion, its resistance will change, through corresponding metering circuit (Huygens's electric bridge), this resistance variations is converted to electric signal (voltage or electric current) again, thus completes process external force being transformed to electric signal.At present, resistance-strain type principle is utilized and for the special construction of supporting structure and custom-designed telescopic force cell also rarely seen report.
Summary of the invention
The present invention is intended to design a kind of telescopic force cell for supporting structure, utilizes the load-bearing monitor of this resistance strain type sensor realization to supporting structure vertical rod, analyzes the stability of supporting structure, ensures that bridge construction safety is carried out smoothly.
To achieve these goals, the present invention adopts following design proposal:
For a telescopic force cell for supporting structure, comprise flexible member 1, first resistance strain gage 2, second resistance strain gage 6, first side trip bolt 3, second side trip bolt 5, three side trip bolt 7, the 4th side trip bolt 8, protecting sheathing 4, fixture splice 9; Flexible member 1 and protecting sheathing 4 are telescoping structure, flexible member 1 is nested in protecting sheathing 4, and is fastenedly connected along the circumference symmetry of flexible member 1 and protecting sheathing 4 by the first side trip bolt 3, second side trip bolt 5, three side trip bolt 7, the 4th side trip bolt 8;
The material of described flexible member 1 is structural alloy steel 40CrNiMoA, and this material has higher tensile strength and yield strength, and can monitor the stressed of supporting structure vertical rod.
First resistance strain gage 2 and the second resistance strain gage 6 are pasted onto the surface of flexible member 1 by glue symmetry, for the distortion of perception flexible member 1, and effectively can eliminate the impact of moment of flexure.
Fixture splice 9 is connected and fixed by the outside surface of threaded engagement and protecting sheathing 4, effectively can protect the wire of drawing from the first resistance strain gage 2 and the second resistance strain gage 6.
The present invention can obtain following beneficial effect:
1, use resistance strain gage 2 and the resistance strain gage 6 of high value, the power consumption of sensor can be reduced; Two resistance strain gage symmetries are pasted onto the surface of flexible member 1, can compensate each other, eliminate the impact of moment of flexure.
2, flexible member 1 adopts the structural alloy steel of high strength, can reduce size sensor, and protecting sheathing 4 adopts aluminum alloy material, can reduce the weight of sensor, and sensor has the advantages such as portable, easy installation.
3, can realize monitoring the supporting structure vertical rod of gate type steel pipe scaffold and bowl fastening type steel pipe scaffold two kinds of specifications is stressed, to the supporting structure vertical rod of two kinds of specifications, there is versatility.
Accompanying drawing explanation
Fig. 1 is used for the overall schematic of the telescopic force cell of supporting structure;
Fig. 2 is used for the flexible member figure of the telescopic force cell of supporting structure;
Fig. 3 is used for the protecting sheathing figure of the telescopic force cell of supporting structure;
Fig. 4 is used for the structural representation of the telescopic force cell of supporting structure;
Fig. 5 is used for the scheme of installation of the telescopic force cell of supporting structure;
In figure: 1, flexible member, 2, resistance strain gage, the 3, first side trip bolt; 4, protecting sheathing, 5, the second side trip bolt; 6, resistance strain gage, 7, three side trip bolt, the 8, the 4th side trip bolt; 9, fixture splice; 10, supporting structure steel pipe, 11, feed screw nut; 12, for the telescopic force cell of supporting structure, 13, base.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and following examples are descriptive is not determinate, can not limit protection scope of the present invention with this.
As Fig. 1-4, be used for the structural representation of the telescopic force cell of supporting structure for the present invention; Flexible member 1 adopts high-strength metal material, and profile is telescopic, and Top-layer Design Method is double layers table stepwise, and the internal diameter of two-layer step is designed to 49mm and 58mm respectively.Sensor is interference fit with coordinating of two kinds of scaffolding steel pipes.Protecting sheathing 4 adopts light alloy material, meets the demand of protection flexible member and can alleviate sensor overall weight, be easy to carry and install.
As shown in Figure 4, the wire of resistance strain gage 2 and resistance strain gage 6 is drawn by fixture splice 9, the lead-in wire of totally 5 different colours in wire, is respectively positive supply first line, negative power line, positive signal line, negative signal line and ground wire.
As shown in Figure 5, sensor installation process is as follows: be first arranged on by sensor on the feed screw nut of supporting structure base, placed in the step with sensor by the steel pipe of supporting structure, sensor inwall contacts without any with leading screw, then sensor only bears the pressure of overhead support structure vertical rod again.The transmitter that the external industry of wire of sensor is conventional and intelligent display instrument, can monitor out the pressure of supporting structure vertical rod.
Claims (1)
1. for a telescopic force cell for supporting structure, it is characterized in that: this sensor comprises flexible member (1), the first resistance strain gage (2), the second resistance strain gage (6), the first side trip bolt (3), the second side trip bolt (5), three side trip bolt (7), the 4th side trip bolt (8), protecting sheathing (4), fixture splice (9); Flexible member (1) and protecting sheathing (4) are telescoping structure, flexible member (1) is nested in protecting sheathing (4), and is fastenedly connected along the circumference symmetry of flexible member (1) and protecting sheathing (4) by the first side trip bolt (3), the second side trip bolt (5), three side trip bolt (7), the 4th side trip bolt (8);
First resistance strain gage (2) and the second resistance strain gage (6) are pasted onto the surface of flexible member (1) by glue symmetry, for the distortion of perception flexible member (1), and effectively can eliminate the impact of moment of flexure;
Fixture splice (9) is connected and fixed by the outside surface of threaded engagement and protecting sheathing (4), effectively can protect the wire of drawing from the first resistance strain gage (2) and the second resistance strain gage (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450733.XA CN105067166A (en) | 2015-07-28 | 2015-07-28 | Sleeve type force transducer for support structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450733.XA CN105067166A (en) | 2015-07-28 | 2015-07-28 | Sleeve type force transducer for support structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105067166A true CN105067166A (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510450733.XA Pending CN105067166A (en) | 2015-07-28 | 2015-07-28 | Sleeve type force transducer for support structures |
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| CN (1) | CN105067166A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN107989357A (en) * | 2018-01-22 | 2018-05-04 | 晋江万芯晨电子科技有限公司 | The intelligent scaffolding steel pipe of stress can be surveyed |
| CN108019035A (en) * | 2017-12-28 | 2018-05-11 | 晋江万芯晨电子科技有限公司 | The jacket-type scaffold base of steel pipe stress can be monitored |
| CN113358464A (en) * | 2021-05-23 | 2021-09-07 | 北京工业大学 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
| WO2023230646A1 (en) * | 2022-06-01 | 2023-12-07 | IQM Systems Pty Ltd | Scaffold load sensing device and monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4416163A (en) * | 1981-06-03 | 1983-11-22 | Alexander Yorgiadis | Strain gage load cell insensitive to external pressure |
| US4932253A (en) * | 1989-05-02 | 1990-06-12 | Mccoy James N | Rod mounted load cell |
| CN104062047A (en) * | 2014-05-15 | 2014-09-24 | 浙江工业大学 | Resistance-strain type load sensor for high-pressure hydrogen sulfide environment |
-
2015
- 2015-07-28 CN CN201510450733.XA patent/CN105067166A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4416163A (en) * | 1981-06-03 | 1983-11-22 | Alexander Yorgiadis | Strain gage load cell insensitive to external pressure |
| US4932253A (en) * | 1989-05-02 | 1990-06-12 | Mccoy James N | Rod mounted load cell |
| CN104062047A (en) * | 2014-05-15 | 2014-09-24 | 浙江工业大学 | Resistance-strain type load sensor for high-pressure hydrogen sulfide environment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN105928642B (en) * | 2016-04-23 | 2018-10-12 | 北京工业大学 | A kind of removable sleeve formula force snesor for supporting structure |
| CN108019035A (en) * | 2017-12-28 | 2018-05-11 | 晋江万芯晨电子科技有限公司 | The jacket-type scaffold base of steel pipe stress can be monitored |
| CN107989357A (en) * | 2018-01-22 | 2018-05-04 | 晋江万芯晨电子科技有限公司 | The intelligent scaffolding steel pipe of stress can be surveyed |
| CN113358464A (en) * | 2021-05-23 | 2021-09-07 | 北京工业大学 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
| WO2023230646A1 (en) * | 2022-06-01 | 2023-12-07 | IQM Systems Pty Ltd | Scaffold load sensing device and monitoring system |
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Application publication date: 20151118 |