CN104422383A - Reference rod type single cantilever beam safety deformation detection device - Google Patents
Reference rod type single cantilever beam safety deformation detection device Download PDFInfo
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- CN104422383A CN104422383A CN201310365780.5A CN201310365780A CN104422383A CN 104422383 A CN104422383 A CN 104422383A CN 201310365780 A CN201310365780 A CN 201310365780A CN 104422383 A CN104422383 A CN 104422383A
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Abstract
The invention relates to a reference rod type single cantilever beam safety deformation detection device which can automatically detect the amount of deformation of a single cantilever beam during load bearing in real time and compare the amount of deformation with the amount of deformation specified by the original design to prevent single cantilever beam equipment from running in an overload state. The working principle of the device is that the stress of an elastic object is proportional to the strain in the limit of elasticity. The load condition of single cantilever beam equipment is judged by detecting the deformation of the single cantilever beam equipment, and then a control command is issued to ensure that the single cantilever beam equipment works in the safety range. The reference rod type single cantilever beam safety deformation detection device of the invention is composed of a single cantilever beam 1, a reference rod 3, a tightening screw 4, a strain type force sensor 5, and a heavy hammer type inverted pendulum angle sensor 6.
Description
Technical field the present invention is the safe deformation detecting device of a kind of benchmark rod-type single cantilever beam, for automatically detecting safe deformation quantity during single cantilever beam load-bearing, belongs to the detection technique field of guaranteeing single cantilever beam device fabrication safety.
Background technology is normal in hoisting machinery adopts single cantilever beam structure, and owing to being had many uncertain factors by lifting component, the hoisting device of single cantilever beam structure usually faces the condition of overload work, brings danger to equipment and personnel; Therefore the work deformation of single cantilever beam is detected and just seem particularly important.
Summary of the invention present invention employs the safe deformation detecting device of a kind of benchmark rod-type single cantilever beam, detect deformation quantity during single cantilever beam load-bearing automatically real-time, and compare with the deformation quantity of former design code, prevent single cantilever beam equipment from running under overload condition.The principle of work of apparatus of the present invention is according to Hooke's law physically, that is: in elastic limit, and the rule that the stress and strain of elastomeric objects is directly proportional.Inferred the loading condition of single cantilever beam equipment by the deformation quantity detecting single cantilever beam equipment, thus send steering order, guarantee that single cantilever beam equipment is operated in safe range.The safe deformation detecting device of benchmark rod-type single cantilever beam of the present invention, it is characterized in that: by installing a baseline rod 3 on the fulcrum pedestal 2 of single cantilever beam 1, stretched out and kept same direction with tested single cantilever beam 1, the detection end of baseline rod 3 is utilized still to keep the feature of original position when single cantilever beam 1 stress deformation, install one in the detection end of baseline rod 3 and hold out against screw 4, then at semi-girder 1 stress deformation position, a set of strain-type force sensor 5 is installed; After holding out against screw 4 and the pre-close contact of strain-type force sensor 5, just can obtain the change in voltage being deformed into linear relationship with single cantilever beam 1 force part.Strain-type force sensor 5 used in the present invention is made up of elastic body, strain ga(u)ge, measuring bridge; Owing to adopting the working method holding out against the pre-close contact of screw 4, the elastic body deformation of strain-type force sensor 5 and semi-girder 1 stress and deformation are inversely.Meanwhile, strain-type force sensor 5 elastic body is owing to selecting the softer materials such as alloy aluminum as matrix, and therefore, the elastomeric rigidity of strain-type force sensor 5 is far smaller than the rigidity of baseline rod 3.When with holding out against after the detection end of screw 4 by the elastic body of strain-type force sensor 5 and semi-girder 1 and baseline rod 3 carry out pre-close contact, the elastomeric deformation quantity of sensor 5 is far longer than the deformation quantity of baseline rod 3, so the deformation quantity of baseline rod 3 is negligible.Error during in order to eliminate installation and eliminate the error that temperature produces, specially installs a Weight type inverted pendulum angular transducer 6 on single cantilever beam 1, be used for confirmation form semi-girder 1 load before initial position.
Below in conjunction with Figure of description 1 and embodiment, the present invention will be further described.
Appended drawings 1 is structural principle schematic diagram of the present invention, and the right of figure is pedestal 2, and pedestal 2 is connected a single cantilever beam 1; It is installed again a baseline rod 3, it stretches out and keeps same direction and substantially parallel installation with tested single cantilever beam 1; Install one in the detection end, left side of baseline rod 3 and hold out against screw 4, then at the opposite site of semi-girder 1 stress deformation, a set of strain-type force sensor 5 is installed; Screw 4 close contact pre-with strain-type force sensor 5 will be held out against; On single cantilever beam 1, a Weight type inverted pendulum angular transducer 6 is installed simultaneously.
The safe deformation detecting device of embodiment benchmark of the present invention rod-type single cantilever beam enters on-the-spot normal work need experience three steps: first correctly install, secondly first bit check, final data collection.The first step is correctly installed: notice during installation that baseline rod 3 being detected the screw 4 that holds out against installed end is installed vertically on same axis with the force part of strain-type force sensor 5, simultaneously with the force part holding out against screw 4 compressive strain formula force cell 5, the distance of itself and single cantilever beam 1 is made to be reduced to δ, when single cantilever beam 1 stressed generation △ θ is out of shape, the force part of strain-type force sensor 5 also can produce a micro-distortion △ δ, △ δ=△ θ theoretically, the distortion △ θ of the stressed generation of such single cantilever beam 1 is just delivered to the force part of strain-type force sensor 5, this type variable △ δ can make measuring bridge out of trim output voltage signal, for controller collection.Second step is bit check just: the safe deformation detecting device of benchmark rod-type single cantilever beam of the present invention installs a Weight type inverted pendulum angular transducer 6 on single cantilever beam 1, acquisition channel 1 first with controller before work gathers the initial position of Weight type inverted pendulum angular transducer 6 in advance, following acquisition channel 2 gathers the output voltage signal of strain-type force sensor 5, as two passages collect data simultaneously, illustrate working properly; As acquisition channel 1 has data, and acquisition channel 2 does not have data, appearance two kinds of situations are described, one does not have pre compressed magnitude, hold out against the force part that screw 4 has departed from strain-type force sensor 5, the deformation △ θ of single cantilever beam 1 does not cause the deformation of strain-type force sensor 5; Its two decrement is excessive, does not reserve △ δ, holds out against the tension that screw 4 is twisted, makes baseline rod 3 occur distortion, at this moment by adjustment △ δ, realizes normally working.3rd step data collection: after second step completes, just normal operation can be entered, the data of Real-time Collection passage 2, and according to the deflection that the rigidity of single cantilever beam 1 allows, monitoring single cantilever beam 1 is operated in safe condition, when there is overload condition, exports steering order by controller, cut off the power supply of motor, guarantee the safety of equipment and operating personnel.
Claims (4)
1. the safe deformation detecting device of benchmark rod-type single cantilever beam, it is characterized in that: by installing a baseline rod 3 on the fulcrum pedestal 2 of single cantilever beam 1, stretched out and kept same direction with tested single cantilever beam 1, the detection end of baseline rod 3 is utilized still to keep the feature of original position when single cantilever beam 1 stress deformation, install one in the detection end of baseline rod 3 and hold out against screw 4, then at semi-girder 1 stress deformation position, a set of strain-type force sensor 5 is installed; After holding out against screw 4 and the pre-close contact of strain-type force sensor 5, just can obtain the change in voltage being deformed into linear relationship with single cantilever beam 1 force part.
2. the safe deformation detecting device of benchmark rod-type single cantilever beam according to claim 1, is characterized in that: strain-type force sensor 5 is made up of elastic body, strain ga(u)ge, measuring bridge; Owing to adopting the working method holding out against the pre-close contact of screw 4, the elastic body deformation of strain-type force sensor 5 and semi-girder 1 stress and deformation are inversely.
3. the safe deformation detecting device of benchmark rod-type single cantilever beam according to claim 1, it is characterized in that: strain-type force sensor 5 elastic body is owing to selecting the softer materials such as alloy aluminum as matrix, therefore, the elastomeric rigidity of strain-type force sensor 5 is far smaller than the rigidity of baseline rod 3.
4. the safe deformation detecting device of benchmark rod-type single cantilever beam according to claim 1, is characterized in that: on single cantilever beam 1 install a Weight type inverted pendulum angular transducer 6, be used for confirmation form semi-girder 1 load before initial position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310365780.5A CN104422383A (en) | 2013-08-21 | 2013-08-21 | Reference rod type single cantilever beam safety deformation detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310365780.5A CN104422383A (en) | 2013-08-21 | 2013-08-21 | Reference rod type single cantilever beam safety deformation detection device |
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| CN104422383A true CN104422383A (en) | 2015-03-18 |
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| CN201310365780.5A Pending CN104422383A (en) | 2013-08-21 | 2013-08-21 | Reference rod type single cantilever beam safety deformation detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219026A (en) * | 2017-05-11 | 2017-09-29 | 广东省计量科学研究院（华南国家计量测试中心） | A kind of multi-direction micro-nano force measuring device and measuring method |
| CN110375891A (en) * | 2019-07-17 | 2019-10-25 | 西湖大学 | A kind of underwater cleaning disk acting force test device and Force measurement method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002162213A (en) * | 2000-11-28 | 2002-06-07 | Nippon Ceramic Co Ltd | Cantilever deformation detection sensor |
| US20060277981A1 (en) * | 2005-06-09 | 2006-12-14 | Tdk Corporation | Micro structure, cantilever, scanning probe microscope and a method of measuring deformation quantity for the fine structure |
| CN101038218A (en) * | 2006-03-17 | 2007-09-19 | 许楠 | Small cantilever beam type walking beam micro-deformation measuring device |
| CN201218760Y (en) * | 2008-04-30 | 2009-04-08 | 中国石油天然气股份有限公司 | Beam-pumping unit walking beam micro-deformation pressure type load sensor |
-
2013
- 2013-08-21 CN CN201310365780.5A patent/CN104422383A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002162213A (en) * | 2000-11-28 | 2002-06-07 | Nippon Ceramic Co Ltd | Cantilever deformation detection sensor |
| US20060277981A1 (en) * | 2005-06-09 | 2006-12-14 | Tdk Corporation | Micro structure, cantilever, scanning probe microscope and a method of measuring deformation quantity for the fine structure |
| CN101038218A (en) * | 2006-03-17 | 2007-09-19 | 许楠 | Small cantilever beam type walking beam micro-deformation measuring device |
| CN201218760Y (en) * | 2008-04-30 | 2009-04-08 | 中国石油天然气股份有限公司 | Beam-pumping unit walking beam micro-deformation pressure type load sensor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219026A (en) * | 2017-05-11 | 2017-09-29 | 广东省计量科学研究院（华南国家计量测试中心） | A kind of multi-direction micro-nano force measuring device and measuring method |
| CN110375891A (en) * | 2019-07-17 | 2019-10-25 | 西湖大学 | A kind of underwater cleaning disk acting force test device and Force measurement method |
| CN110375891B (en) * | 2019-07-17 | 2021-05-11 | 西湖大学 | Underwater cleaning disc acting force testing device and acting force measuring method |
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Application publication date: 20150318 |