CN107289332A - The abnormal method of infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline - Google Patents
The abnormal method of infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline Download PDFInfo
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- CN107289332A CN107289332A CN201710333351.8A CN201710333351A CN107289332A CN 107289332 A CN107289332 A CN 107289332A CN 201710333351 A CN201710333351 A CN 201710333351A CN 107289332 A CN107289332 A CN 107289332A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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Abstract
The present invention relates to the method that a kind of infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline is abnormal.Moved towards along buried pipe network, detection directly buried heat distribution pipeline road surface temperature shoots four width Infrared Thermograms, according to temperature anomaly region area and temperature change, earth's surface temperature anomaly area is positioned.To there is the region of heat-insulation layer breakage or leakage failure, being measured with soil temperature-moisture sensor, recording the soil moisture and volumetric water content.Show bigger thermograde in vertical direction, and the normal/abnormal region underlying soil of surface temperature volumetric water content with when the trend of change in depth is consistent but abnormal area soil moisture content is slightly above normal region, judgement is that buried pipe network heat-insulation layer is damaged；Above-mentioned two region underground temperature and volumetric water content are in significant difference with the change of depth, then the surface temperature anomaly is buried pipe network leakage.The present invention can be accurately positioned heat distribution pipeline leakage point, heat-insulation layer breaking point position, and guide maintenance personnel repairing reduces blindness excavated pavement, improves first-aid repair efficiency.
Description
Technical field
The present invention relates to the method that a kind of infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline is abnormal, it is specially
Using Infrared Thermography Technology couple the method for soil temperature and humidity detection to judge that directly buried heating pipeline system leakage or heat-insulation layer are damaged
Method.The present invention can be accurately positioned heat distribution pipeline leakage point or heat-insulation layer breaking point position, instruct pipeline maintenance personnel couple
This region is excavated, rushes to repair work, reduces the loss that blindness excavated pavement is brought, and improves first-aid repair efficiency.
Background technology
Invest that small, construction speed is fast because directly buried installation has, take up an area less and be easy to and other underground pipings and facility phase
The advantages of coordination, therefore, in city old town, the location that street is narrow and small, underground utilities are intensive, applied more than heating network using direct-burried
If, but directly buried installation can cause very big difficulty to detection, the maintenance of heat distribution pipeline leakage point or heat-insulation layer breaking point；If can not
The leakage point or heat-insulation layer breaking point of positioning heat distribution pipeline, can bring great energy waste and property loss in time.
After directly buried heat distribution pipeline road heat-insulation layer is damaged, damaged part can be to strong radiating around so that heat occurs for surrounding soil
Moisture migration, it is final to cause top earth's surface formation temperature anomaly area；After directly buried heat distribution pipeline road local leakage, hot water can be constantly to week
Soil infiltration is enclosed, until soil reaches saturated aqueous state, with the increase of leakage rate, hot water permeable areas can constantly expand,
So that top earth's surface can also form temperature anomaly area.It therefore, it can different by analyzing surface temperature above directly buried heat distribution pipeline road
Reason condition is leaked or heat-insulation layer breakage to judge that it whether there is.
Directly buried heating pipeline system detection generally uses manual inspection method, by directly observing and utilizing " the warm rifle of point " detection heating power
Pipe network lays earth's surface surface appearance to position the leakage point and heat-insulation layer breaking point of heat distribution pipeline, and still, the method is only applicable
In detecting, surface temperature abnormality degree is very big, heat-insulation layer is damaged or the serious pipeline fault of abnormal leakage, it is difficult to realize to whole
The real-time detection of heat distribution pipe network failure.Zhao Kai exists《Heat supply network Research on fault diagnosis method》In describe a kind of leakage of heat distribution pipe network
Isolation detection method, close portions valve corresponding pipeline section is isolated from whole heat supply network, by observing rate of water make-up
And the situation of change of hydraulic pressure, determine whether isolated part pipeline section leaks；But whether this method can only determine isolation pipeline section
There is leakage failure, can not but be accurately positioned leakage point.Dan Lijun exists《Heat supply pipeline leakage detection method is inquired into》Describe one
Heat distribution pipe network leakage sound and vibration detection method is planted, i.e., when well interior conduit and pipe fitting leakage are monitored using equipment such as audition rod, leakage measuring instrument by sonic
The voice signal of generation, and then leakage is determined whether there is, it is then artificial to judge the distance between leakage point and test point；But
It is that this method requires that the experience level of staff high, detection signal is vulnerable to ambient noise interference, and is difficult to accurately sentence
Where disconnected leakage point position.Li Huizeng exists《Infrared thermal imaging technique is applied to detection technique of the heat distribution pipe network insulation with leaking and ground
Study carefully》A kind of detection method moved towards along directly buried pipeline, surface temperature is shot using thermal infrared imager is proposed, passes through comparative analysis
The Infrared Thermogram in surface temperature exceptions area and the normal area of temperature is included simultaneously, to judge the leakage of directly buried heat distribution pipeline road or be incubated
Layer is damaged, and this method can intuitively, fast be positioned to directly buried heating pipeline system abort situation, still, is but difficult to differentiate between
Leaked on earth with differentiation heat distribution pipe network or heat-insulation layer is damaged.
The content of the invention
It is an object of the invention to provide the side that a kind of infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline is abnormal
Method, can be to overcome the deficiencies in the prior art, and the present invention can be accurately positioned heat distribution pipeline leakage point or heat-insulation layer breaking point institute
In position, and the fault type in directly buried heat distribution pipeline road can be accurately judged, so as to instruct pipeline maintenance personnel to carry out this region
It is rational to excavate, rush to repair work, the loss that blindness excavated pavement is brought is reduced, first-aid repair efficiency is improved.
The method for the infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline exception that the present invention is provided includes as follows
Step：
1）Moved towards along buried pipe network, directly buried heat distribution pipeline road surface temperature is detected using hand-held thermal infrared imager, to surface temperature
Exceptions area is positioned；
2）To oriented surface temperature Wen Changqu, at a certain time interval（Time interval is advisable for 5-24 hours）Shoot at least
Four width Infrared Thermograms, pass through the change of temperature anomaly region area and temperature value in the width earth's surface Infrared Thermogram of com-parison and analysis four
Change situation, judges that heat distribution pipe network whether there is failure.Under close weather conditions, if surface temperature abnormal area area is maintained
Constant or lasting increase, maximum temperature value remains unchanged or constantly improve, then judges that underground pipe network has heat-insulation layer breakage at this
Or leakage failure；Otherwise, then, as emphasis monitoring object, will periodically it be detected at this.
3）There is the region of heat-insulation layer breakage or leakage failure for having determined that, in temperature anomaly region and adjacent temperature
Suitable position at normal region each selected one, is fetched earth using geotome vertical drilling.When hole depth is 100mm, stops and take out
Go out geotome, by the soil at soil temperature-moisture sensor patchhole bottom, after soil temperature-moisture sensor indicating value is stable, record
The soil moisture and volumetric water content, extract Temperature Humidity Sensor out；Then, repetition is above-mentioned fetches earth and Temperature and Humidity step, respectively
In 200mm, 300mm, 400mm, 500mm, 600mm or even the deeper position detection soil moisture and volumetric water content, hole depth is most
Vertical range greatly between value and buried pipeline upper surface is advisable with 200mm.
4）In buried pipe network top surface temperature normal region, with the increase of Temperature and Humidity point depth, the soil moisture
The trend gradually increased is presented with volumetric water content.If the soil moisture under surface temperature abnormal area is showed in vertical direction
Go out bigger thermograde, and the normal/abnormal region underlying soil of surface temperature volumetric water content with change in depth trend
Unanimously but when abnormal area soil moisture content is slightly above normal region, it can determine that the surface temperature anomaly is buried pipe network
Caused by heat-insulation layer is damaged.If above-mentioned two region underground temperature and volumetric water content are presented notable with the changing rule of depth
Difference, then can determine that the surface temperature anomaly is that buried pipe network leakage is caused.
Suitable for -40 DEG C of thermal infrared imager test temperature ~ 120 DEG C of the present invention, soil temperature-moisture sensor temperature survey model
Enclose -40 DEG C ~ 120 DEG C, volumetric water content measurement range 0% ~ 100%（Or m3/m3）.
The invention provides the method that infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline is abnormal.By infrared
Thermal imaging system can intuitively, quickly and correctly position the temperature anomaly area of earth's surface above directly buried heat distribution pipeline road；For having determined
The pipeline section leaked, temperature anomaly area that thermal imaging system is determined it is determined that be the position of heat distribution pipeline leakage point so that
Instruct pipeline maintenance personnel to carry out excavating repairing work to this region, reduce the loss that blindness excavated pavement is brought, improve repairing
Efficiency；The temperature and volumetric water content of soil at this are measured with the changing condition of depth of soil by soil temperature and humidity instrument, so that
Judge pipeline unusual condition, heat distribution pipeline leakage need to carry out excavating repairing work as early as possible, and heat pipeline heat insulation layer breakage can be with
Carry out maintenance work in non-heating period.In a word, the present invention can be accurately positioned guilty culprit position and the event of buried thermo-pipeline
Hinder type, contribute to the energy of the testing cost, raising fault diagnosis rate, reduction heating network of reduction heat distribution pipe network unusual condition former
Waste.
Brief description of the drawings
Fig. 1 is the high mausoleum section surface temperature exceptions area of the heat distribution pipe network of embodiment 1 in Infrared Thermogram not in the same time.
Fig. 2 is that the high mausoleum section surface temperature exceptions area infrared image of the heat distribution pipe network of embodiment 1 fixes line segment L1 Temperature Distributions.
Fig. 3 is that the high mausoleum section surface temperature exceptions area infrared image of the heat distribution pipe network of embodiment 1 fixes line segment L2 Temperature Distributions.
Fig. 4 is the high mausoleum section surface temperature exceptions area of the heat distribution pipe network of embodiment 1 and the normal area's soil moisture of temperature with depth
Change.
Fig. 5 be the heat distribution pipe network of embodiment 1 high mausoleum section surface temperature exceptions area and the normal area's volumetric soil water content of temperature with
The change of depth.
Fig. 6 is the excavation result of the high mausoleum section surface temperature exceptions area position of the heat distribution pipe network of embodiment 1（Heat-insulation layer is broken
Damage）.
Fig. 7 is the young section surface temperature exceptions area of 2 heat distribution pipe network of embodiment one in Infrared Thermogram not in the same time.
Fig. 8 is that the children section of 2 heat distribution pipe network of embodiment one surface temperature exceptions area infrared image fixes line segment L1 Temperature Distributions.
Fig. 9 is that the children section of 2 heat distribution pipe network of embodiment one surface temperature exceptions area infrared image fixes line segment L2 Temperature Distributions.
The young section surface temperature exceptions area of 2 heat distribution pipe network of Figure 10 embodiments one and the normal area's soil moisture of temperature with depth change
Change.
The young section surface temperature exceptions area of 2 heat distribution pipe network of Figure 11 embodiments one and the normal area's volumetric soil water content of temperature are with depth
The change of degree.
The excavation result of the young section surface temperature exceptions area position of 2 heat distribution pipe network of Figure 12 embodiments one（Pipe leakage）.
Embodiment
A kind of method for infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline exception that the present invention is designed, mainly
Hardware includes thermal infrared imager, computer and soil temperature-moisture sensor, and the said equipment is commercially available prod.Suitable for the present invention
- 40 DEG C of thermal infrared imager temperature measurement range ~ 120 DEG C, -40 DEG C of soil temperature-moisture sensor temperature measurement range ~ 120 DEG C, body
Product measurement of water ratio scope 0% ~ 100%（Or m3/m3）.
Embodiment is as follows：
1st, during heating in the winter time, sunny and relatively low wind speed night is selected or in the absence of direct sunlight and wind speed is less white
My god, moved towards along buried pipe network, hand-held thermal infrared imager scans for formula detection, search, position earth's surface temperature anomaly region.
2nd, to oriented surface temperature Wen Changqu, at a certain time interval（Time interval is advisable for 5-24 hours）Shoot
At least four width Infrared Thermograms, carry software analysis using thermal infrared imager and compare temperature anomaly area in earth's surface Infrared Thermogram
The situation of change of domain area and temperature value, judges that heat distribution pipe network whether there is failure.Under close weather conditions, if earth's surface temperature
Degree abnormal area area remains unchanged or persistently increased, and maximum temperature value remains unchanged or constantly improve, then judges underground at this
There is heat-insulation layer breakage or leakage failure in pipe network；Otherwise, then, as emphasis monitoring object, will periodically it be detected at this.
3rd, there is the region of heat-insulation layer breakage or leakage failure for having determined that, in temperature anomaly region and adjacent temperature
Suitable position at normal region each selected one, is fetched earth using geotome vertical drilling.When hole depth is 100mm, stops and take out
Go out geotome, by the soil at soil temperature-moisture sensor patchhole bottom, after soil temperature-moisture sensor indicating value is stable, record
The soil moisture and volumetric water content, extract Temperature Humidity Sensor out；Then, repetition is above-mentioned fetches earth and Temperature and Humidity step, respectively
In 200mm, 300mm, 400mm, 500mm, 600mm or even the deeper position detection soil moisture and volumetric water content, hole depth is most
Vertical range greatly between value and buried pipeline upper surface is advisable with 200mm.
4th, in buried pipe network top surface temperature normal region, with the increase of Temperature and Humidity point depth, the soil moisture
The trend gradually increased is presented with volumetric water content.If the soil moisture under surface temperature abnormal area is showed in vertical direction
Go out bigger thermograde, and the normal/abnormal region underlying soil of surface temperature volumetric water content with change in depth trend
Unanimously but when abnormal area soil moisture content is slightly above normal region, it can determine that the surface temperature anomaly is buried pipe network
Caused by heat-insulation layer is damaged.If above-mentioned two region underground temperature and volumetric water content are presented notable with the changing rule of depth
Difference, then can determine that the surface temperature anomaly is that buried pipe network leakage is caused.
The experimental method of unreceipted actual conditions in embodiment, generally according to the bar described in normal condition and handbook
Part, or according to the condition proposed by manufacturer；Common apparatus, material used etc., unless otherwise specified, can be from business way
Footpath is obtained.
Application Example
In embodiment, the model FLIR Therma CAMTM S65 of used thermal infrared imager（FLIR Systems are public
Department）；The infrared thermal image technique software installed on the computer is FLIR Therma CAM Researcher Pro 2.7
（FLIR Systems companies）.Soil temperature and relative humidity model OSA-9, OSA-1, display instrument model OSC-1
（Hebei Ou Su Electronic Science and Technology Co., Ltd.s）.
Embodiment 1：Pipe insulating layer damage testing method and testing result
On January 1st, 2017, once net the non-irrigated river pipeline section in high mausoleum for Chengde heat supply and carry out infrared thermal imagery coupling soil temperature and humidity inspection
Survey, pipe diameter 1000mm, buried depth 1.5m, 110 DEG C of supply water temperature at this, soil is organoclay.Infrared thermal imagery distance of camera lens
Table 3m, other parameters set and are shown in Table 1.
The infrared heat image instrument measuring parameter setting of table 1
| Detection time | Atmospheric temperature | Environment temperature | Relative air humidity | Emissivity | Temperature range |
| On January 1 10:49 | -3℃ | -2℃ | 47% | 0.95 | -40℃~120℃ |
| On January 2 09:52 | -7℃ | -6℃ | 57% | 0.95 | -40℃~120℃ |
| On January 2 16:49 | 0℃ | 1℃ | 50% | 0.95 | -40℃~120℃ |
| On January 3 07:46 | -8℃ | -7℃ | 59% | 0.95 | -40℃~120℃ |
Surface temperature exists abnormal above the high mausoleum segment pipe of Chengde heat distribution pipe network, hence it is evident that higher than the surface temperature of adjacent area；
4 moment Infrared Thermogram as shown in figure 1, surface temperature abnormal area is rounded, area is about 1.5m2, with when
Between passage, significant change does not occur for temperature anomaly region area.In fixing line L1, L2（L1, L2 be thermography in run through center
The vertical line and x wire of high-temperature region）On, surface temperature is in normal distribution form；Over time, the earth's surface on L1, L2
Obvious change does not occur for profiling temperatures, as shown in Figure 2 and Figure 3.According to above phenomenon, buried pipe network at this is tentatively inferred
There is heat-insulation layer breakage or abnormal leakage, accordingly, it would be desirable to Temperature and Humidity be carried out to underground at this, further to judge event
Hinder type.
The suitable position at temperature anomaly region and adjacent temperature normal region each selected one, it is vertical using geotome
Boring extracting soil, and using soil temperature-moisture sensor measure different depth soil temperature and volumetric water content, the soil moisture and
Volumetric water content is with depth（0~600mm）Changing rule as shown in Figure 4, Figure 5.In surface temperature normal region, with depth
Increase, soil moisture curve is presented the trend that slowly increases, 21.9 DEG C reached in 600mm depths；In surface temperature exceptions area
Domain, soil moisture curve is notable with the variation abnormality of depth, there is bigger thermograde, 71.3 have been reached in 600mm depths
DEG C, there is strong heat effect to surrounding soil in this explanation heat distribution pipe network.But, above-mentioned two regional soil volumetric water content
It is basically identical with the variation tendency of depth, and the soil moisture content in temperature anomaly region is slightly higher, this illustrates heating power is not present at this
Soil moisture content greatly improves phenomenon caused by pipeline network leak, and the micro increase of volumetric soil water content is that the soil moisture is improved
It is caused.
The above-mentioned testing result of comprehensive analysis, it is that buried pipe network heat-insulation layer is damaged caused to judge the surface temperature anomaly；
On March 20th, 2017, maintenance personal has organized to excavate and constructed, and excavates result as shown in fig. 6, buried pipeline there occurs really at this
The heat-insulation layer of large area is damaged.Prove effectiveness of the invention and correctness.
Embodiment 2：Buried thermo-pipeline leakage detection method and testing result
On December 29th, 2016, infrared thermal imagery coupling soil is carried out for Chengde the first kindergarten of heating network branch net pipeline section
Temperature and Humidity, pipe diameter is 100mm, buried depth 1.2m at this, and feed pipe temperature is 110 DEG C；Its earth's surface is the thick lotuses of 100mm
Blue brick, Dutch brick next coming in order are the cement sand bed and 200mm cement concrete layers that thickness is 100mm, are sandy further below
Soil.Infrared thermal imagery distance of camera lens earth's surface 3m, other parameters set and are shown in Table 2..
The infrared heat image instrument measuring parameter setting of table 2
| Detection time | Atmospheric temperature | Environment temperature | Relative air humidity | Emissivity | Temperature range |
| On December 29 16:19 | -3℃ | -1℃ | 41% | 0.93 | -40℃~120℃ |
| On December 30 09:22 | -11℃ | -10℃ | 44% | 0.93 | -40℃~120℃ |
| On December 30 16:54 | -3℃ | -2℃ | 51% | 0.93 | -40℃~120℃ |
| On December 31 08:34 | -7℃ | -6℃ | 43% | 0.93 | -40℃~120℃ |
Surface temperature exists abnormal above the young segment pipe of Chengde heat distribution pipe network one, hence it is evident that higher than the surface temperature of adjacent area；
4 moment Infrared Thermogram as shown in fig. 7, surface temperature abnormal area in ellipticity, central high temperature region present band
The trend gradually increased is presented in shape, over time, surface temperature abnormal area area and central high temperature area area.
In fixing line L1, L2, the surface temperature distribution of synchronization is more uniform, but over time, surface temperature is in integrally
Reveal the trend being gradually increasing, as shown in Figure 8, Figure 9.When the reason for △ t=40h period bulk temperatures have declined and long night
Between consecutive low temperature it is relevant.According to above phenomenon, tentatively infer that buried pipe network has heat-insulation layer breakage or leakage at this, therefore, needs
Temperature and Humidity is carried out to underground at this, further to judge fault type.
The suitable position at temperature anomaly region and adjacent temperature normal region each selected one, it is vertical using geotome
Boring extracting soil, and utilize the temperature and volumetric water content of soil temperature-moisture sensor measurement different depth soil；Due to children's pipe
There is Dutch brick, screed and the concrete layer that gross thickness is 400mm, therefore, the soil moisture and volumetric water content institute in section earth's surface
There is measuring point to be physically located under concrete layer.The soil moisture and volumetric water content are with depth（400-1000mm）Changing rule such as
Shown in Figure 10, Figure 11, in surface temperature normal region, the soil moisture increases the trend for presenting and gradually increasing with depth, but it increases
Width is smaller, and in 1000mm depths, the soil moisture only has 5.5 DEG C；In surface temperature abnormal area, close to the shallow soil of concrete layer
Earth temperature is about 65 DEG C, but other depth the soil moisture all more than 90 DEG C, this explanation pipe network around soil added
Heat.In surface temperature normal region, volumetric soil water content is with depth in slightly increase trend；But in surface temperature exceptions area
The trend that dramatically increases is presented with depth in domain, soil moisture content, the volumetric water content of deep soil close to saturated aqueous state,
The hot water of this explanation heat distribution pipe network leakage permeates completely in soil.
In summary testing result, judges that surface temperature anomaly is that buried thermo-pipeline leakage is caused at this.2016
On December 31, in, maintenance personal has organized to excavate and constructed, and excavates result as shown in figure 12, and pipeline is straight through 3mm in the presence of one at this
The leak of left and right.Demonstrate effectiveness of the invention and correctness.
In 2016-2017 Heating Seasons, applicant is based on infrared thermal imagery proposed by the present invention coupling soil temperature and humidity detection
The abnormal method of buried thermo-pipeline, to the local 70 kilometers of long buried thermo-pipelines of Chengde Co., Ltd of heating power group
Search type diagnosis has been carried out, has found that failure more than 50 is located altogether.Later stage excavates result and proved, infrared thermal imagery coupling soil temperature and humidity detection
Damaged and leakage the method for buried thermo-pipeline heat-insulation layer, with 100% degree of accuracy, be the said firm saved substantial amounts of operation,
Detection and maintenance cost.
Claims (5)
1. a kind of abnormal method of infrared thermal imagery coupling soil temperature and humidity detection buried thermo-pipeline, it is characterised in that including as follows
Step：
1）Moved towards along buried pipe network, directly buried heat distribution pipeline road surface temperature is detected using hand-held thermal infrared imager, to surface temperature
Exceptions area is positioned；
2）To oriented surface temperature Wen Changqu, at a time interval（Time interval is advisable for 5-24 hours）Shoot at least four
Width Infrared Thermogram, passes through the change of temperature anomaly region area and temperature value in the width earth's surface Infrared Thermogram of com-parison and analysis four
Situation, judges that heat distribution pipe network whether there is failure；Under close weather conditions, if surface temperature abnormal area area is maintained not
Become or lasting increase, maximum temperature value remains unchanged or constantly improve, then judge at this underground pipe network exist heat-insulation layer it is damaged or
Leakage failure；Otherwise, then, as emphasis monitoring object, will periodically it be detected at this；
3）There is the region of heat-insulation layer breakage or leakage failure for having determined that, it is normal in temperature anomaly region and adjacent temperature
Suitable position at region each selected one, is fetched earth using geotome vertical drilling；When hole depth is 100mm, stop and extract out to take
Earth boring auger, by the soil at soil temperature-moisture sensor patchhole bottom, after soil temperature-moisture sensor indicating value is stable, records soil
Temperature and volumetric water content, extract Temperature Humidity Sensor out；Then, repetition is above-mentioned fetches earth and Temperature and Humidity step, exists respectively
200mm, 300mm, 400mm, 500mm, 600mm or even the deeper position detection soil moisture and volumetric water content；
4）In buried pipe network top surface temperature normal region, with the increase of Temperature and Humidity point depth, the soil moisture and body
The trend gradually increased is presented in product moisture content；If the soil moisture under surface temperature abnormal area is shown more in vertical direction
Big thermograde, and the normal/abnormal region underlying soil of surface temperature volumetric water content with change in depth trend it is consistent,
But when abnormal area soil moisture content is slightly above normal region, can determine that the surface temperature anomaly is buried pipe network heat-insulation layer
Caused by damaged；If significant difference is presented with the changing rule of depth in above-mentioned two region underground temperature and volumetric water content,
Then can determine that the surface temperature anomaly is that buried pipe network leakage is caused.
2. according to the method described in claim 1, it is characterised in that step 2）Described shooting time was at intervals of 5-24 hours.
3. according to the method described in claim 1, it is characterised in that step 3）Described soil temperature and humidity test point spacing is
100mm, the vertical range between hole depth maximum and buried pipeline upper surface is advisable with 200mm.
4. according to any described methods of claim 1-3, it is characterised in that described thermal infrared imager temperature-measuring range is -40 DEG C
~120℃。
5. according to any described methods of claim 1-3, it is characterised in that described soil temperature-moisture sensor temperature survey
- 40 DEG C of scope ~ 120 DEG C；Volumetric water content measurement range 0% ~ 100% or m3/m3。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111579434A (en) * | 2020-05-24 | 2020-08-25 | 河北工业大学 | Method for establishing soil heat-moisture coupling model test similarity criterion |
| CN112113448A (en) * | 2020-09-23 | 2020-12-22 | 安徽农业大学 | Method for determining equivalent heat transfer coefficient of heat pipe embedded in oscillating plow breast |
| CN112396943A (en) * | 2020-12-04 | 2021-02-23 | 河北工业大学 | Experiment box and experiment method for simulating leakage of underground heat distribution pipeline |
| CN113945244A (en) * | 2021-11-09 | 2022-01-18 | 广东电网有限责任公司电力科学研究院 | Soil state monitoring device for direct-buried GIL fault early warning |
| CN114216063A (en) * | 2021-12-17 | 2022-03-22 | 天津求实飞博科技有限公司 | Method for determining leakage information of heat distribution pipeline |
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| CN113945244A (en) * | 2021-11-09 | 2022-01-18 | 广东电网有限责任公司电力科学研究院 | Soil state monitoring device for direct-buried GIL fault early warning |
| CN113945244B (en) * | 2021-11-09 | 2023-04-25 | 广东电网有限责任公司电力科学研究院 | Soil state monitoring device for direct-buried GIL fault early warning |
| CN114216063A (en) * | 2021-12-17 | 2022-03-22 | 天津求实飞博科技有限公司 | Method for determining leakage information of heat distribution pipeline |
| CN114216063B (en) * | 2021-12-17 | 2023-10-24 | 天津求实飞博科技有限公司 | Method for determining leakage information of thermal pipeline |
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