CN102288147A - Device for measuring scouring depth monitored based on active temperature control distributed temperature - Google Patents
Device for measuring scouring depth monitored based on active temperature control distributed temperature Download PDFInfo
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- CN102288147A CN102288147A CN 201110120766 CN201110120766A CN102288147A CN 102288147 A CN102288147 A CN 102288147A CN 201110120766 CN201110120766 CN 201110120766 CN 201110120766 A CN201110120766 A CN 201110120766A CN 102288147 A CN102288147 A CN 102288147A
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Abstract
The invention discloses a device for measuring scouring depth monitored based on active temperature control distributed temperature, belonging to the technical field of structural engineering and sensing. The device comprises a distributed heating device, a distributed temperature monitoring device and a packaging sleeve. The distributed heating device is arranged in the centre of the scouring depth measuring device. The packaging sleeve is outmost. The distributed temperature monitoring device is arranged between the distributed heating device and the packaging sleeve, but the distributed temperature monitoring device can also be embedded in the inner wall of the packaging sleeve. The temperature of the scouring depth measuring device is actively increased by utilizing the distributed heating device; therefore, a temperature field is abnormal at the interface between running water and foundation soil in the process of increasing and decreasing the temperature of the scouring depth measuring device; and the scouring depth is monitored by monitoring the abnormal condition of the temperature field through the distributed temperature monitoring device. Sensitivity coefficients of the scouring depth measuring device can be adjusted by controlling an actively increased practical temperature value. The device disclosed by the invention has the advantages of simple structure, high measurement precision and low cost and is applicable to industrial production.
Description
Technical field
The invention belongs to Structural Engineering and field of sensing technologies, relate to a kind of scour depth measurement mechanism based on the monitoring of active temperature control distributed temperature.
Background technology
Because the needs of economic construction, the construction of Chinese large-sized bridge structure, water conservancy project, maritime works, harbor work's structure increases day by day.For example at bridge structure, river, river long term in the bridge Service Environment, bed configuration and geologic condition complexity are different, and Hong Jishui flows urgency suddenly, and the local scour at the pier footing place that therefore paddles is quite obvious.Near the Bridge Pier basis that flood causes bridge crosses that to wash away be the common cause that causes that bridge lost efficacy.In recent years, in more famous cause bridge to ruin the bridge of accident be line Ba river, Gansu Province sea bridge of China because of bridge crosses to wash away.On June 9th, 2002, Xi'an, Shaanxi Ba He flash flood washes away Gansu Province sea 1～No. 5 pier of line Ba river bridge, and the 1st～6 hole beam falls, and causes sea, Gansu Province line two-wire 14h 30min that cuts off traffic.August 2 calendar year 2001 and 4 days, outer Jia Heqiao of blue smoke line K168+457 and line K34+879 Dong Quan river, Dongguo bridge collapse because of bridge crosses to wash away respectively, proper because of taking measures, in time block and stopped train, good fortune does not cause great personnel's property loss, but also railway normally being runed to produce has caused very big difficulty, two bridges to have to rebuild.China has carried out that the inspection of the bridge hydrology is calculated and the shallow foundation generaI investigation under the unified plan of the Ministry of Railways and leader, worked out the bridge regulation of shallow foundation bridge and timber basis and planned.In other harbor works, hydro-structure, the problem of washing away presses for research equally.
Current, bridge crosses flushing monitoring and mainly relies on visual monitoring and instrument monitoring.Instrument monitoring can be divided into retainer instrument monitoring and portable instrument monitoring again.The general sonar technique that adopts of retainer instrument monitoring, it can provide washes away curve over time.Measurement data both can on-the-spotly be downloaded by hand, also can utilize the wireless data sending technology to download in the base station.Portable instrument generally also adopts sonar technique, and it can or use between different bridges along a bridge.Except that sonar technique, abroad also studied and utilized ground penetrating radar method, reflection earthquake section method, electrical conductivity method etc. to wash away the technology of measurement.The ground penetrating radar method has transmitter and receiver need not soak, section extensible cross sandbar or to the bank, the depth structure model of accurate riverbed and riverbed deposit thing can be provided.The reflection earthquake section method can provide an accurate constructional depth model and a rice order of magnitude silt degree of depth, but energy measurement section not can not extend on the bank, and instrument is more expensive.Also there is application to set up the method report that elastic mechanism is realized the scour depth monitoring based on fiber-optic grating sensor, but this kind method encapsulating structure complexity, monitoring result receives that environmental interference is bigger, permanance is bad.In general, it is comparatively expensive that these wash away the general instrument of method of testing, manipulates complexity, and it is not very general using.The means of visual monitoring can be divided into plummet depth measurement, Underwater Camera and frogman and touch spy.Measure for the channel scour under high wind speed, the conditions of high flow rate, can use the streamlined fish lead to measure scour depth.
Now, the sensor or the sensing technology that are used for temperature monitoring are of a great variety, can satisfy the various requirement of engineering practice or research work substantially.A lot of temperature sensors can both be realized high resolving power, high-precision temperature monitoring.For example, the highest resolution of current advanced person's fiber-optical grating temperature sensor can reach 0.02 ℃, precision can reach 0.1 ℃, and fiber-optical grating temperature sensor to have a volume little, anti-electromagnetic interference (EMI), anticorrosive, high temperature resistant, signal attenuation is little, the collection information sensing be transmitted in characteristics such as one, solve the conventional sense technology and be difficult to competent fully problems of measurement, thereby can be as the temperature monitoring sensor in the foundation soil flushing monitoring technology.What in addition, current development was ripe relatively all can be used for temperature monitoring in the foundation soil flushing monitoring technology based on the temperature monitoring technology of principles such as thermopair, thermal resistance and BOTDR (A) technology that developing rapidly.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of measurement mechanism that can monitor the foundation soil scour depth, accurately realize measurement, and satisfy of the requirement of actual abominable engineering-environment simultaneously for monitoring system permanance, stability to the foundation soil scour depth.
Technical scheme of the present invention is:
A kind of scour depth measurement mechanism based on the monitoring of active temperature control distributed temperature mainly comprises distributed heating arrangement, distributed temperature monitoring device, encapsulation sleeve pipe.
Center based on the scour depth measurement mechanism of active temperature control distributed temperature monitoring is distributed heating arrangement, outermost is the encapsulation sleeve pipe, between distributed heating arrangement and encapsulation sleeve pipe is the distributed temperature monitoring device, but the distributed temperature monitoring device also can be embedded in the inwall that encapsulates sleeve pipe, promptly becomes one with the encapsulation sleeve pipe.
When the temperature of this scour depth measurement mechanism is higher than its peripheral foundation soil and flowing water temperature, heat in scour depth measurement mechanism dissipation rate in foundation soil and flowing water is obviously different, this heat dissipation rate different mainly by the thermodynamic parameter of the flowability of water and foundation soil and water difference caused.Therefore, utilize existing heating tape, resistive heater distributed heating arrangement initiatively to heat for the scour depth measurement mechanism, it is unusual to produce the temperature field so in intensification of scour depth measurement mechanism and temperature-fall period at the interface place of flowing water and foundation soil, monitor the monitoring that this temperature field can be realized scour depth unusually by the distributed temperature monitoring device, concrete distributed temperature monitoring device can use such as FBG, distribution type fiber-optic, platinum resistance, DS18B20 equitemperature measurement mechanism.By controlling the adjusting that the actual temperature value that initiatively heats can realize scour depth measurement mechanism sensitivity coefficient.In addition this technology is applied to simultaneously the interface of water and air, can realizes monitoring height of water level.
The present invention is simple in structure, and the measuring accuracy height is with low cost, is suitable for industrialization production.
Description of drawings
Fig. 1 is an applied environment synoptic diagram of the present invention.
Among the figure: 1 scour depth measurement mechanism based on the monitoring of active temperature control distributed temperature; 2 aouatic structure things; 3 foundation soils; 4 flowing water.
Fig. 2 is local planing surface figure of the present invention.
Among the figure: 5 distributed heating arrangements; 6 distributed temperature monitoring devices; 7 encapsulation sleeve pipes.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
The present invention is a kind of sensing device that is used for monitoring science of bridge building, harbor work's structure, marine structure foundation soil scour depth.For example can be used for monitoring bridge structure pier body, cushion cap or basis under the water body dynamic action, bottom sediment is washed away to be taken away, and structure is exposed the degree of depth in water body; And monitoring tube frame ocean platform steel pipe, the isostructural scour depth of bridge spanning the sea piling bar.
A kind of scour depth measurement mechanism based on the monitoring of active temperature control distributed temperature mainly comprises distributed heating arrangement, distributed temperature monitoring device, encapsulation sleeve pipe.
Center based on the scour depth measurement mechanism of active temperature control distributed temperature monitoring is distributed heating arrangement, outermost is the encapsulation sleeve pipe, between distributed heating arrangement and encapsulation sleeve pipe is the distributed temperature monitoring device, but the distributed temperature monitoring device also can be embedded in the inwall that encapsulates sleeve pipe, promptly becomes one with the encapsulation sleeve pipe.
When the temperature of this scour depth measurement mechanism is higher than its peripheral foundation soil and flowing water temperature, heat in scour depth measurement mechanism dissipation rate in foundation soil and flowing water is obviously different, this heat dissipation rate different mainly by the thermodynamic parameter of the flowability of water and foundation soil and water difference caused.Therefore, utilize existing heating tape, resistive heater distributed heating arrangement initiatively to heat for the scour depth measurement mechanism, it is unusual to produce the temperature field so in intensification of scour depth measurement mechanism and temperature-fall period at the interface place of flowing water and foundation soil, monitor the monitoring that this temperature field can be realized scour depth unusually by the distributed temperature monitoring device, concrete distributed temperature monitoring device can use such as FBG, distribution type fiber-optic, platinum resistance, DS18B20 equitemperature measurement mechanism.By controlling the adjusting that the actual temperature value that initiatively heats can realize scour depth measurement mechanism sensitivity coefficient.In addition this technology is applied to simultaneously the interface of water and air, can realizes monitoring height of water level.
When specifically using the scour depth measurement mechanism of monitoring based on active temperature control distributed temperature, it can be arranged in aouatic structure thing surface, and the part of sensor is imbedded in the foundation soil, part can realize the measurement of scour depth like this in flowing water.If will surface based on the top of the scour depth measurement mechanism of active temperature control distributed temperature monitoring, then can realize the monitoring of height of water level synchronously.
Claims (1)
1. scour depth measurement mechanism based on active temperature control distributed temperature monitoring, mainly comprise distributed heating arrangement, distributed temperature monitoring device, encapsulation sleeve pipe, it is characterized in that, the center of this scour depth measurement mechanism is distributed heating arrangement, outermost is the encapsulation sleeve pipe, is the distributed temperature monitoring device at distributed heating arrangement and encapsulation between the sleeve pipe, but the distributed temperature monitoring device also can be embedded in the inwall that encapsulate sleeve pipe, promptly with encapsulate sleeve pipe and become one; Utilize existing heating tape, resistive heater distributed heating arrangement initiatively to heat for the scour depth measurement mechanism, so the scour depth measurement mechanism heat up and temperature-fall period in can to produce the temperature field at the interface place of flowing water and foundation soil unusual, this temperature field main unusually by water flowability and the thermodynamic parameter of foundation soil and water difference caused; Monitor the monitoring that this temperature field can be realized scour depth unusually by the distributed temperature monitoring device again, concrete distributed temperature monitoring device can use such as FBG, distribution type fiber-optic, platinum resistance, DS18B20 equitemperature measurement mechanism; By controlling the adjusting that the actual temperature value that initiatively heats can realize this scour depth measurement mechanism sensitivity coefficient; In addition, this scour depth measurement mechanism is applied to the interface of water and air simultaneously, can realizes monitoring height of water level.
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| CN 201110120766 CN102288147A (en) | 2011-05-10 | 2011-05-10 | Device for measuring scouring depth monitored based on active temperature control distributed temperature |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517399A (en) * | 2012-01-09 | 2012-06-27 | 青岛理工大学 | Thermal transmission detection method based on DNA (Deoxyribonucleic Acid) amplification |
| CN102650606A (en) * | 2012-05-03 | 2012-08-29 | 大连理工大学 | Optical sensing detection device and method for fluid medium interface |
| CN102864756A (en) * | 2012-09-10 | 2013-01-09 | 重庆交通大学 | Measuring and controlling method of maximal scouring depth of bridge abutment |
| CN103411649A (en) * | 2013-08-24 | 2013-11-27 | 丁勇 | Heat transferring bridge type erosion and deposition sensor and manufacturing and installation method thereof |
| CN103453869A (en) * | 2013-08-24 | 2013-12-18 | 丁勇 | Heat transmission bridge type sensor for measuring erosion and deposition depth on periphery of bridge steel pipe pile |
| CN104677460A (en) * | 2015-03-23 | 2015-06-03 | 上海理工大学 | Liquid level detecting device |
| CN104990611A (en) * | 2015-06-26 | 2015-10-21 | 中国石油化工股份有限公司胜利油田分公司 | Optical fiber sensing equipment detecting oil-water interface of storage pot |
| CN106248029A (en) * | 2016-08-29 | 2016-12-21 | 南京理工大学 | A kind of modular isolation heat bridge type erosion and deposition depth transducer |
| CN106979791A (en) * | 2017-04-20 | 2017-07-25 | 苏州南智传感科技有限公司 | Interior heating FBG sensor and its method for packing |
| CN110987036A (en) * | 2019-11-14 | 2020-04-10 | 北京遥测技术研究所 | Photoelectric composite thermal cable and optical fiber sensor using same |
| CN111351469A (en) * | 2020-03-17 | 2020-06-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Channel single-point silt scouring real-time monitoring system and monitoring method thereof |
| WO2021212951A1 (en) * | 2020-04-25 | 2021-10-28 | 华北水利水电大学 | Geological radar-based riverbed sediment distribution detection device, system and method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517399B (en) * | 2012-01-09 | 2013-07-31 | 青岛理工大学 | Thermal transmission detection method based on DNA (Deoxyribonucleic Acid) amplification |
| CN102517399A (en) * | 2012-01-09 | 2012-06-27 | 青岛理工大学 | Thermal transmission detection method based on DNA (Deoxyribonucleic Acid) amplification |
| CN102650606A (en) * | 2012-05-03 | 2012-08-29 | 大连理工大学 | Optical sensing detection device and method for fluid medium interface |
| CN102864756A (en) * | 2012-09-10 | 2013-01-09 | 重庆交通大学 | Measuring and controlling method of maximal scouring depth of bridge abutment |
| CN103453869B (en) * | 2013-08-24 | 2015-12-02 | 丁勇 | Measure the heat transfer bridge type magnetic sensor of the bridge steel pile tube periphery erosion and deposition degree of depth |
| CN103411649A (en) * | 2013-08-24 | 2013-11-27 | 丁勇 | Heat transferring bridge type erosion and deposition sensor and manufacturing and installation method thereof |
| CN103453869A (en) * | 2013-08-24 | 2013-12-18 | 丁勇 | Heat transmission bridge type sensor for measuring erosion and deposition depth on periphery of bridge steel pipe pile |
| CN104677460A (en) * | 2015-03-23 | 2015-06-03 | 上海理工大学 | Liquid level detecting device |
| CN104677460B (en) * | 2015-03-23 | 2018-01-16 | 上海理工大学 | Liquid level detection device |
| CN104990611A (en) * | 2015-06-26 | 2015-10-21 | 中国石油化工股份有限公司胜利油田分公司 | Optical fiber sensing equipment detecting oil-water interface of storage pot |
| CN106248029A (en) * | 2016-08-29 | 2016-12-21 | 南京理工大学 | A kind of modular isolation heat bridge type erosion and deposition depth transducer |
| CN106979791A (en) * | 2017-04-20 | 2017-07-25 | 苏州南智传感科技有限公司 | Interior heating FBG sensor and its method for packing |
| CN110987036A (en) * | 2019-11-14 | 2020-04-10 | 北京遥测技术研究所 | Photoelectric composite thermal cable and optical fiber sensor using same |
| CN111351469A (en) * | 2020-03-17 | 2020-06-30 | 水利部交通运输部国家能源局南京水利科学研究院 | Channel single-point silt scouring real-time monitoring system and monitoring method thereof |
| WO2021212951A1 (en) * | 2020-04-25 | 2021-10-28 | 华北水利水电大学 | Geological radar-based riverbed sediment distribution detection device, system and method |
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Application publication date: 20111221 |