CN104697676A - Long-base-line strain gauge and hull beam stress long-term monitoring device - Google Patents
Long-base-line strain gauge and hull beam stress long-term monitoring device Download PDFInfo
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- CN104697676A CN104697676A CN201410691323.XA CN201410691323A CN104697676A CN 104697676 A CN104697676 A CN 104697676A CN 201410691323 A CN201410691323 A CN 201410691323A CN 104697676 A CN104697676 A CN 104697676A
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Abstract
The invention provides a long-base-line strain gauge and hull beam stress long-term monitoring device. The long-base-line strain gauge and hull beam stress long-term monitoring device comprises two bases, wherein a first support and a second support are respectively installed on the two bases, a magnetostrictive displacement sensor is installed on the first support, one end of a measuring extension rod is fixedly connected with one end of a slide block installing rod arranged in the middle of the magnetostrictive displacement sensor, the other end of the slide block installing rod is connected with a sensor measuring slide block, and the other end of the measuring extension rod is fixedly connected with the second support. The long-base-line strain gauge and hull beam stress long-term monitoring device has the advantages of being simple in structure, convenient to install, dispense with calibration, accurate in measurement and free of temperature drift and the like and is suitable for long-term monitoring of hull beam stress and load states of large ships.
Description
Technical field
The present invention relates to a kind of hull beam load of long-term Real-Time Monitoring large ship and the device of stress, particularly relate to a kind of Long baselines strainmeter and hull beam stress long term monitoring device.
Background technology
Hull structural strength is one of principal element affecting Navigation Safety, and hull beam longitudinal strength is the wherein most most important intensity of fundamental sum.In order to ensure that boats and ships beam has enough intensity to resist environmental load to structural damage effect, people, in Ship Design and building course, propose a lot of design philosophy, have formulated various specification, technique and maintenance plan.But because the Ship Structure load of navigating by water in wave has very strong randomness, and these randomness load accurately can not be expected in design and building course, therefore in order to ensure vessel structure safety in navigation process and expected service life, need to carry out long-term Real-Time Monitoring to hull loads and stress.And method in the past usually also exist cannot measure that hull Liangping all strains, calibration process compared with complicated, that installation difficulty large, temperature drift is comparatively large, precision is lower, cost is higher defect, be difficult to the Real-Time Monitoring realizing hull beam stress.Present inventor, through research, proposes the strain of a kind of new hull beam and monitor for stress, can reach satisfied effect.
Summary of the invention
The object of the invention is to carry out Real-Time Monitoring to hull beam and a kind of Long baselines strainmeter and hull beam stress long term monitoring device are provided.
The object of the present invention is achieved like this: a kind of Long baselines strainmeter, comprise two bases, two bases are installed respectively the first support and the second support, magnetostrictive displacement sensor is arranged on the first support, the one end measuring expansion link is fixedly connected with the one end of the slide block mounting rod arranged in the middle of magnetostrictive displacement sensor, the other end of slide block mounting rod is connected with sensor measurement slide block, and the other end measuring expansion link is fixedly connected with the second support.
A kind of hull beam stress long term monitoring device, hull beam is installed with Long baselines strainmeter, hull beam is also provided with temperature sensor, Long baselines strainmeter and temperature sensor by cable respectively be arranged on the signal condition unit of ship wheel house, data acquisition process computing machine and alarm unit and be connected; Described Long baselines strainmeter comprises two bases, two bases are installed respectively the first support and the second support, magnetostrictive displacement sensor is arranged on the first support, the one end measuring expansion link is fixedly connected with the one end of the slide block mounting rod arranged in the middle of magnetostrictive displacement sensor, the other end of slide block mounting rod is connected with sensor measurement slide block, and the other end measuring expansion link is fixedly connected with the second support.
Compared with prior art, the invention has the beneficial effects as follows: the present invention is based on a kind of Long baselines strainmeter of magnetostrictive displacement sensor technical design to measure the mean strain of hull beam, and have employed proper temperature indemnifying measure overcome in previous methods temperature drift defect, utilize acquisition process computer real-time acquisition process hull beam strain information, reach the object of Real-Time Monitoring hull beam stress and longitudinal strength, have structure simple, without the need to calibration, measure accurate, easy to use, cost is low, without temperature drift, be applicable to the features such as long term monitoring.Apparatus of the present invention can solve well and utilize general measuring method cannot the difficult problem of long term monitoring hull beam stress and real-time assessment overall longitudinal strength of hull, overcome multiple similar inventions before this and cannot measure that hull Liangping all strains, measuring accuracy is lower, calibration is more complicated, cost is higher, temperature drift is large, be not suitable for the defects such as long term monitoring.
Accompanying drawing explanation
Fig. 1 is the structural representation of Long baselines strainmeter of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the A-A partial sectional view of Fig. 1;
Fig. 4 is hull beam stress long term monitoring device of the present invention composition schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Case study on implementation one: a kind of Long baselines strainmeter, comprise two bases 7 and 16, two bases 7 and 16 are installed respectively the first support 3 and the second support 8, magnetostrictive displacement sensor 1 is arranged on the first support 3, the one end measuring expansion link 2 is fixedly connected with the one end of the slide block mounting rod 17 arranged in the middle of magnetostrictive displacement sensor 1, the other end of slide block mounting rod 17 is connected with sensor measurement slide block 18, and the other end measuring expansion link 2 is connected with the second support solid 8 is fixed.
When Long baselines strainmeter is installed, first packing ring 4, packing ring 5 and nut 6 is used by the first support 3 to be arranged on base 16 respectively, second support 8 adopts the mounting means identical with support 1, and the distance between the first support 3 and the second support 8 pilot hole just in time can adjust as required; Be 2 meters with the distance between the pilot hole of two supports in the implementation case to be described, secondly, magnetostrictive displacement sensor 1 be arranged on the first support 3 by bolt washer nut combinations 9,10,11 and 12.Then linked together by internal thread in one end and slide block mounting rod 17 of measuring expansion link 2, the other end measuring expansion link 2 is linked together by lining 13, bolt 14 and internal teeth serrated lock washer 15 and support 2.
Long baselines strainmeter of the present invention operationally can be arranged in hull beam or in the subject surface of other needs monitorings, for hull beam, mounting means is different according to the difference of ship type, large opening ship at least installs six Long baselines strainmeters, non-large opening ship at least installs four Long baselines strainmeters, and installation site can according to the specification of specific type of ship with reference to relevant classification society.When Long baselines strainmeter is installed, first two mounting seat 7 and 16 are welded and are being positioned in hull beam one section of continuous deck, when hull beam then between two supports deforms, measurement expansion link 2 can drive on the track of sensor measurement slide block 18 on magnetostrictive displacement sensor 1 and slide, and then export by sensor internal circuit the 4-20mA current signal that represents displacement, this displacement signal is converted to the mean strain information of 2 meters of length structure by certain algorithm, so just obtain the mean strain of tested locations of structures, avoid the impact of stress concentration point, ensure that the accuracy of measured hull beam strain value.
Case study on implementation two: a kind of hull beam stress long term monitoring device, hull beam is installed with Long baselines strainmeter, hull beam is also provided with temperature sensor, Long baselines strainmeter and temperature sensor by cable respectively be arranged on the signal condition unit of ship wheel house, data acquisition process computing machine and alarm unit and be connected; Described Long baselines strainmeter comprises two bases, two bases are installed respectively the first support and the second support, magnetostrictive displacement sensor is arranged on the first support, the one end measuring expansion link is fixedly connected with the one end of the slide block mounting rod arranged in the middle of magnetostrictive displacement sensor, the other end of slide block mounting rod is connected with sensor measurement slide block, and the other end measuring expansion link is fixedly connected with the second support.
A kind of hull beam stress long term monitoring device provided by the invention is work like this: be first installed in hull beam structure by the temperature sensor of 4-6 Long baselines strainmeter and respective amount, its installation site and quantity can with reference to relevant classification society rules, mounting temperature sensor in the structure simultaneously near strain measurement point.Secondly, signal condition unit, data acquisition process computing machine and alarm unit are installed on ship wheel house correct position respectively.When boats and ships ride the sea, the hull beam between two supports deforms and the sensor measurement slide block 18 on magnetostrictive displacement sensor 1 can be driven to reciprocatingly slide by measuring expansion link 2, and then exports a displacement signal.Strain and temperature data are transferred to signal condition unit by 4-20mA current forms, and all current signals are carried out intrinsic safety isolation and convert voltage signal strain and temperature to by signal condition unit.Acquisition process computing machine, by synchronous acquisition voltage signal, then will record strain information and carry out temperature compensation by certain algorithm, to eliminate the impact of Sensor temperature drift.Strain value after compensation resolves into all directions strain value corresponding to hull beam load by suitable algorithm again, and this just obtains the stress state of hull beam measurement point, and then obtains the stress state of whole hull beam by linear difference.Then carry out early warning by alarm unit for the severe stress state monitored, namely the present invention can also be reported to the police to severe stress state by alarm unit, thus ensure that navigation safety and structural safety.
Claims (2)
1. a Long baselines strainmeter, it is characterized in that: comprise two bases, two bases are installed respectively the first support and the second support, magnetostrictive displacement sensor is arranged on the first support, the one end measuring expansion link is fixedly connected with the one end of the slide block mounting rod arranged in the middle of magnetostrictive displacement sensor, the other end of slide block mounting rod is connected with sensor measurement slide block, and the other end measuring expansion link is fixedly connected with the second support.
2. a hull beam stress long term monitoring device, it is characterized in that: hull beam is installed with Long baselines strainmeter, hull beam is also provided with temperature sensor, Long baselines strainmeter and temperature sensor by cable respectively be arranged on the signal condition unit of ship wheel house, data acquisition process computing machine and alarm unit and be connected; Described Long baselines strainmeter comprises two bases, two bases are installed respectively the first support and the second support, magnetostrictive displacement sensor is arranged on the first support, the one end measuring expansion link is fixedly connected with the one end of the slide block mounting rod arranged in the middle of magnetostrictive displacement sensor, the other end of slide block mounting rod is connected with sensor measurement slide block, and the other end measuring expansion link is fixedly connected with the second support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410691323.XA CN104697676A (en) | 2015-03-26 | 2015-03-26 | Long-base-line strain gauge and hull beam stress long-term monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410691323.XA CN104697676A (en) | 2015-03-26 | 2015-03-26 | Long-base-line strain gauge and hull beam stress long-term monitoring device |
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| CN104697676A true CN104697676A (en) | 2015-06-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528630A (en) * | 2018-03-30 | 2018-09-14 | 广船国际有限公司 | A kind of structural deformation monitoring method during shipbuilding |
| CN110553770A (en) * | 2019-07-17 | 2019-12-10 | 哈尔滨工程大学 | Fault diagnosis algorithm for large drift abnormal value of sensor of ship structure stress monitoring system |
| CN111311872A (en) * | 2020-02-18 | 2020-06-19 | 上海中船船舶设计技术国家工程研究中心有限公司 | Long-term monitoring and alarming system for stress of hull structure |
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| CN1175305A (en) * | 1994-12-16 | 1998-03-04 | 安全设备公司 | Method and device for continuous monitoring of dynamic loads |
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| CN102928293A (en) * | 2012-10-26 | 2013-02-13 | 重庆交通大学 | Dynamic and static testing system and method for multifunctional wharf structure |
| CN204405235U (en) * | 2015-03-13 | 2015-06-17 | 哈尔滨工程大学 | A kind of Long baselines strainmeter and hull beam stress long term monitoring device |
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2015
- 2015-03-26 CN CN201410691323.XA patent/CN104697676A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1362969A1 (en) * | 1986-03-07 | 1987-12-30 | Предприятие П/Я В-8662 | Method of measuring axial force of ship propeller and device for effecting same |
| CN1175305A (en) * | 1994-12-16 | 1998-03-04 | 安全设备公司 | Method and device for continuous monitoring of dynamic loads |
| CN202083345U (en) * | 2011-03-01 | 2011-12-21 | 欧阳祖熙 | Displacement sensing device for borehole strain meter |
| CN102322814A (en) * | 2011-09-15 | 2012-01-18 | 中国科学院半导体研究所 | Optical fiber drilling strain gauge |
| CN102721490A (en) * | 2012-07-09 | 2012-10-10 | 河北工业大学 | Passive pressure sensor based on giant magnetostrictive material Terfenol-D |
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| CN204405235U (en) * | 2015-03-13 | 2015-06-17 | 哈尔滨工程大学 | A kind of Long baselines strainmeter and hull beam stress long term monitoring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528630A (en) * | 2018-03-30 | 2018-09-14 | 广船国际有限公司 | A kind of structural deformation monitoring method during shipbuilding |
| CN110553770A (en) * | 2019-07-17 | 2019-12-10 | 哈尔滨工程大学 | Fault diagnosis algorithm for large drift abnormal value of sensor of ship structure stress monitoring system |
| CN111311872A (en) * | 2020-02-18 | 2020-06-19 | 上海中船船舶设计技术国家工程研究中心有限公司 | Long-term monitoring and alarming system for stress of hull structure |
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Application publication date: 20150610 |