CN105299478B - A kind of method that can quickly read flange and the accumulative use time of pipeline - Google Patents
A kind of method that can quickly read flange and the accumulative use time of pipeline Download PDFInfo
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- CN105299478B CN105299478B CN201510773072.4A CN201510773072A CN105299478B CN 105299478 B CN105299478 B CN 105299478B CN 201510773072 A CN201510773072 A CN 201510773072A CN 105299478 B CN105299478 B CN 105299478B
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Abstract
The invention discloses a kind of method that can quickly read flange and the accumulative use time of pipeline, chip and signal source are buried in flange body, activation signal source sends signal during mounting flange, chip, which is received, to be started timing and preserves after signal, when needing to know that flange and pipeline add up use time, flange is scanned with digital independent device, the time of preservation is sent to digital independent device by flange, and digital independent device shows the time received.The present invention can quickly know the accumulative use time of flange and pipeline, be easy to workman to change flange and pipeline in time, it is to avoid due to heavy losses caused by oil or natural gas leakage.And it is simple to operate, it is not necessary to the accumulative use time of flange and pipeline is recorded, the workload of workman is alleviated.
Description
Technical field
The invention belongs to the manufacture field of flange, more particularly to a kind of it can quickly read flange and the accumulative of pipeline uses
The method of time.
Background technology
Flange and pipeline are the commonly used connection equipment of pipeline transportation.What it is due to oil and natural gas pipelined is oil
And natural gas, once leaking, huge loss will be caused.Therefore the sealing requirements connected to pipeline are very high.Flange and
After a protracted use, the damage that flange can be slowly is, it is necessary to which replacing in time, otherwise will cause oil and natural gas to pipeline
Leakage, causes huge loss.Using the accumulative use time of manual record flange and pipeline during existing processing method, by work
People changes flange in time according to the accumulative use time of flange.There is following defect in such processing mode：Due to pipeline number
Amount is huge, causes the data of manual record huge, while pipeline is often reclaimed, then installs and uses again, and manual record can be frequent
Error, or the use time of flange and pipeline is failed to record, cause flange and pipeline more than service life to install and use again
Existing great potential safety hazard..
The content of the invention
In order to overcome above-mentioned existing replacing flange and pipeline existing defects, the invention provides can quickly read flange and
The method that pipeline adds up use time, workman can know that flange and the accumulative of pipeline use with digital independent device scanning flange
Time, it is easy to workman to change flange in time, it is to avoid due to heavy losses caused by oil or natural gas leakage.And operation letter
Folk prescription is just, it is not necessary to records the accumulative use time of flange, alleviates the workload of workman.
The present invention is for the technical scheme that is used of solution above-mentioned technical problem：
A kind of method that can quickly read flange and the accumulative use time of pipeline, it is characterised in that：In flange body
Activation signal source sends signal when embedded chip and signal source, mounting flange and pipeline, and chip, which is received, starts timing after signal
And preserve, it is necessary to when knowing that flange and pipeline add up use time, scan flange with digital independent device, flange by preservation when
Between be sent to digital independent device, digital independent device shows the time received.
The specifications and models of flange and pipeline, production time, production numbering, service life and tired are also preserved in the chip
Count use time etc..
The chip includes signal receiving module, signal processing module, timing module and information preserving module, and signal is received
Module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The signal source is touch switch signal source or approach switch signal source.
The touch switch signal source is touch switch, and activation is triggered after flange and pipeline is installed and sends letter
Number, chip, which is received, to be started timing and preserves after signal.
Touch switch can pass through artificial touch-pressure switch, the outside part touch-pressure switch close to flange or outside insertion
The part touch-pressure switch of flange, gets out of the way to close and closes or disconnect, switch closure or disconnection form signal and be transferred to chip.
The approach switch signal source is electromagnetic wave signal source, and during mounting flange, electromagnetic wave signal source receives return
Electromagnetic wave will activate and send signal, chip, which is received, to be started timing and preserves after signal.
Electromagnetic wave signal source produces electromagnetic wave and launched from end face of flange, circumference of flange or flange bolt hole, when having
Exterior object is close to end face of flange, close to circumference of flange or enters flange bolt hole, and reflection of electromagnetic wave is returned, proximity switch production
There is exterior object close or insert the signal of flange, this signal is transferred to chip.
The approach switch signal source includes magnet, nonmagnetic material and sensor, and nonmagnetic material is arranged on flange body
Bolt hole surrounding, be mounted with magnet and sensor on the nonmagnetic material.
When mounting flange and pipeline, bolt passing through bolt hole, the magnetic field that magnet is sent magnetizes bolt, and now sensor is examined
The magnetic field that the bolt being magnetized is sent is surveyed, the signal for detecting magnetic field is sent to chip by sensor, and the signal of chip receives mould
Block receives the signal for detecting magnetic field, and signal processing module reads the signal for detecting magnetic field and controls timing module to start
Timing, while information preserving module preserves the time that timing module starts timing.
When changing flange and pipeline, bolt takes out bolt hole, and the bolt being magnetized is taken away, and sensor can not detect bolt
The magnetic field sent, the signal receiving module of chip, which is received, can not detect the signal in magnetic field, and signal processing module reads nothing
Method controls timing module to stop timing after detecting the signal in magnetic field, while information preserving module, which preserves timing module, stops timing
Time.
The chip is connected with sensor by signal wire.
Signal projector is embedded with the flange body.
The signal projector is connected with chip by signal wire.
The signal projector is integrated on chip mainboard.
The signal projector is antenna.
The approach switch signal source includes magnet, nonmagnetic material and sensor, and the flange body includes the first method
Set in blue body and second flange body, second flange body in nonmagnetic material, nonmagnetic material and be mounted with magnet and sensor,
Chip is buried in the second flange body, the first flange body is metal flange body.
The approach switch signal source is inductance type, condenser type or Hall proximity test sensor, the flange sheet
Body includes burying chip, the first flange body in first flange body and second flange body, the second flange body
For metal flange body.
In connecting pipeline, when the additional metal body on first flange body or first flange close to second flange or
When bolt inserts flange bolt hole, Sensor monitoring is close to metallic object, and sensor will activate chip, and chip automatically begins to note
The record time.
In connecting pipeline, the first flange body and second flange body being fixed on two pipelines are close, by bolt
It is inserted into bolt hole, is connected first flange body and second flange body by bolt.First flange body is close
The magnet of body sends magnetic field and magnetizes first flange body in second flange body, second flange, and sensor detects magnet
Magnetized first flange body, sensor activation chip, chip automatically begins to the record time.
The approach switch signal source includes magnet, nonmagnetic material and sensor, and the flange body includes the first method
Set in blue body and second flange body, the first flange body and magnetic is installed in the first nonmagnetic material, the first nonmagnetic material
Set in body, the second flange body in the second nonmagnetic material, the setting of the second nonmagnetic material and sensor, described second are installed
Chip is buried in flange body.
In connecting pipeline, the first flange body and second flange body being fixed on two pipelines are close.By bolt
It is inserted into bolt hole, because two flange bodies are close, the magnetic field that the magnet in first flange body is sent is from notch
Going out to be detected by a sensor, once sensor detects magnetic field, sensor will activate chip, and chip automatically begins to record
Time.
Compared with prior art, the invention has the advantages that：
In flange and pipeline before use, staff uses digital independent device（Such as electronic scanner）Scan flange, inspection
Survey device to be communicated by wireless signal with chip, the information of preservation is sent to detector by chip, and user passes through detector
The information in chip is just can know that, information includes the accumulative use time of flange and pipeline（It is exactly the time of chip record）, go out
The information such as factory's time, manufacturer, specification, model.So user only need to can with the lower flange of detector scanner scanning one
Know the information such as the accumulative use time of flange and pipeline, whether change flange to user and pipeline provides accurate reference,
It is easy to user to change flange and pipeline in time.And user need not re-record the accumulative use time of flange and pipeline,
It is simple and convenient also without record sheet is checked.User can also know flange and the pipeline time of making the product, manufacturer, specification,
The information such as model, according to these information, user is known that the service life of flange and pipeline, and flange is changed in time, is ensureing
Flange and pipeline extend the accumulative use time of flange and pipeline as far as possible on the premise of not damaging, reduce the cost of enterprise.
User is able to know that the information such as flange and the pipeline time of making the product, manufacturer, specification, model, accumulative use time, thing occurs
Therefore it is easy to accident investigation, with trackability.User just may know that flange and pipeline by scanning the flange that changes
Accumulative use time, it is to avoid the flange and pipeline for using more than service life cause security incident.
Brief description of the drawings
Fig. 1 is the structural representation of the first flange body of the embodiment of the present invention 3；
Fig. 2 is the structural representation of the second flange body of the embodiment of the present invention 3；
Fig. 3 is the structural representation of the first flange body of the embodiment of the present invention 4；
Fig. 4 is the structural representation of the second flange body of the embodiment of the present invention 4；
Fig. 5 is the structural representation of the embodiment of the present invention 5；
Fig. 6 is the structural representation that the embodiment of the present invention 5 connects into pipeline；
Fig. 7 is the operation principle block diagram of chip of the present invention.
Marked in figure：1st, flange body, 11, first flange body, 12, second flange body, 2, bolt, 3, sensor,
4th, magnet, 5, nonmagnetic material, the 51, first nonmagnetic material, the 52, second nonmagnetic material, 6, chip, 7, bolt hole, 8, pipeline
Embodiment
With reference to embodiment, the invention will be further described, and described embodiment is only a part of the invention
Embodiment, is not whole embodiments.Based on the embodiment in the present invention, one of ordinary skill in the art is not making
Other embodiments used obtained under the premise of creative work, belong to protection scope of the present invention.
Present invention be distinguished in that：The specification type of flange just can easily be read out by digital independent device
Number, the production time, production numbering, the information such as service life and accumulative use time.
The present invention includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange sheet
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving letter
Start timing after number and preserve.
Present invention additionally comprises digital independent device, the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, service life are also preserved in the chip 6 and adds up to use
Time etc..
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present invention is elaborated with specific embodiment below.
Embodiment 1
The present embodiment includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving
Start timing after signal and preserve.
The present embodiment also includes digital independent device, and the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, accumulative use time etc. are also preserved in the chip 6.
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present embodiment signal source is touch switch signal source.
The touch switch signal source is touch switch, and activation is triggered after flange is installed and sends signal, chip connects
Receive and start timing after signal and preserve.
Touch switch can pass through artificial touch-pressure switch, the outside part touch-pressure switch close to flange or outside insertion
The part touch-pressure switch of flange, gets out of the way to close and closes or disconnect, switch closure or disconnection form signal and be transferred to chip.
Embodiment 2
The present embodiment includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving
Start timing after signal and preserve.
The present embodiment also includes digital independent device, and the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, accumulative use time etc. are also preserved in the chip 6.
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present embodiment signal source is approach switch signal source.
The approach switch signal source is electromagnetic wave signal source, and during mounting flange, electromagnetic wave signal source receives return
Electromagnetic wave, which will be activated, sends signal, and chip, which is received, to be started timing and preserve after signal.
Electromagnetic wave signal source produces electromagnetic wave and launched from end face of flange, circumference of flange or flange bolt hole, when having
Exterior object is close to end face of flange, close to circumference of flange or enters flange bolt hole, and reflection of electromagnetic wave is returned, proximity switch production
There is exterior object close or insert the signal of flange, this signal is transferred to chip.
Embodiment 3
The present embodiment includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving
Start timing after signal and preserve.
The present embodiment also includes digital independent device, and the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, service life are also preserved in the chip 6 and adds up to use
Time etc..
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present embodiment signal source is approach switch signal source.
The approach switch signal source includes magnet 4, nonmagnetic material 5 and sensor 3, and the flange body 1 includes the
First nonmagnetic material 51, the first non-magnetic are set in one flange body 11 and second flange body 12, the first flange body 11
Property body 51 in magnet 4 is installed, set in the second nonmagnetic material 52, the second nonmagnetic material 52 and pacify in the second flange body 12
Equipped with sensor 3, chip 6 is buried in the second flange body 12.
In connecting pipeline, the first flange body and second flange body being fixed on two pipelines are close.Due to two
Individual flange body is close, and the magnetic field that the magnet in first flange body is sent will be detected by a sensor, once sensor is examined
Magnetic field is measured, sensor will activate chip, and chip automatically begins to the record time.
Embodiment 4
The present embodiment includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving
Start timing after signal and preserve.
The present embodiment also includes digital independent device, and the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, service life are also preserved in the chip 6 and adds up to use
Time etc..
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present embodiment signal source is approach switch signal source.
The approach switch signal source includes magnet 4, nonmagnetic material 5 and sensor 3, and the flange body 1 includes the
Set in nonmagnetic material 5, nonmagnetic material 5 and be provided with one flange body 11 and second flange body 12, second flange body 12
Chip 6 is buried in sensor 3 and magnet 4, the second flange body 12, the first flange body 11 is metal flange sheet
Body.
In connecting pipeline, the first flange body and second flange body being fixed on two pipelines are close, by bolt
It is inserted into bolt hole, is connected first flange body and second flange body by bolt.First flange body is close
The magnet of body sends magnetic field and magnetizes first flange body in second flange body, second flange, and sensor detects magnet
Magnetized first flange body, sensor activation chip, chip automatically begins to the record time.
Embodiment 5
The present embodiment includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving
Start timing after signal and preserve.
The present embodiment also includes digital independent device, and the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, service life are also preserved in the chip 6 and adds up to use
Time etc..
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present embodiment signal source is approach switch signal source.
The approach switch signal source includes magnet 4, nonmagnetic material 5 and sensor 3, and nonmagnetic material 5 is arranged on flange sheet
Magnet 4 and sensor 3 are installed in the bolt hole surrounding of body 1, the nonmagnetic material 5.
During mounting flange, bolt passing through bolt hole, the magnetic field that magnet is sent magnetizes bolt, and now sensor detection is by magnetic
The signal for detecting magnetic field is sent to chip by the magnetic field that the bolt of change is sent, sensor, and the signal receiving module of chip is received
To the signal for detecting magnetic field, signal processing module reads the signal for detecting magnetic field and controls timing module to start timing,
Information preserving module preserves the time that timing module starts timing simultaneously.
When changing flange, bolt takes out bolt hole, and the bolt being magnetized is taken away, and sensor can not detect what bolt was sent
Magnetic field, the signal that sensor will be unable to detect magnetic field is sent to chip, and the signal receiving module of chip is received and can not detected
To the signal in magnetic field, signal processing module is read controls timing module to stop timing after the signal that can not detect magnetic field, together
When information preserving module preserve the time that timing module stops timing.
The chip 6 is communicated with sensor 3 by wireless signal, and certain chip 6 can also lead to sensor 3
Signal wire is crossed to be connected.
Signal projector is embedded with the flange body 1.The signal projector is connected with chip by signal wire, when
The right signal projector can also be integrated on chip 6.The signal projector is antenna.
Embodiment 6
The present embodiment includes flange body 1, in addition to chip 6 and signal source, and the chip 6 and signal source are embedded in flange
In body 1, the signal source sends signal upon activation；The chip 6 is used for the signal for receiving signal source transmitting, is receiving
Start timing after signal and preserve.
The present embodiment also includes digital independent device, and the digital independent device is used for the data for reading chip preservation.
Flange specifications and models, production time, production numbering, accumulative use time etc. are also preserved in the chip 6.
The chip 6 includes signal receiving module, signal processing module, timing module and information preserving module, and signal connects
Receiving module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
The present embodiment signal source is approach switch signal source.
The approach switch signal source is inductance type, condenser type or Hall proximity test sensor, the flange body 1
Including first flange body and second flange body, chip is buried in the second flange body, the first flange body is
Metal flange body.
In connecting pipeline, when the additional metal body on first flange body or first flange close to second flange or
When bolt inserts flange bolt hole, sensor device monitors that metallic object is close, and sensor will activate chip, and chip is automatically begun to
The record time.
Many pipelines 8 are connected into pipeline by above-mentioned flange body 1 by bolt 2 through bolt hole 7.
Claims (8)
1. a kind of method that can quickly read flange and the accumulative use time of pipeline, it is characterised in that：Buried in flange body
If chip and signal source, activation signal source sends signal during mounting flange, and chip, which is received, to be started timing and preserve after signal, needed
It is to be understood that when flange adds up use time, flange is scanned with digital independent device, the time of preservation is sent to data and read by flange
Device is taken, digital independent device shows the time received；The signal source is that touch switch signal source or proximity are opened
OFF signal source；The approach switch signal source includes magnet, nonmagnetic material and sensor, and nonmagnetic material is arranged on flange body
Bolt hole at, be mounted with magnet and sensor in the nonmagnetic material.
2. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 1, its feature
It is：Flange and pipeline specification model, production time are also preserved in the chip, numbering, service life is produced and adds up to make
With time, during digital independent device scanning flange body, chip while can also compile flange specifications and models, production time, production
Number, the information of service life and accumulative use time be sent to digital independent device.
3. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 1 or 2, it is special
Levy and be：The chip includes signal receiving module, signal processing module, timing module and information preserving module, and signal is received
Module is used to receive the signal that sensor transmissions come, the letter that the signal processing module is received according to signal receiving module
Number, control timing module starts timing or terminates timing, and the timing module is used to record the time and sends out the time of record
Information preserving module is given, described information preserving module is used to store the time that timing module is sended over.
4. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 1, its feature
It is：The touch switch signal source is touch switch, and activation is triggered after flange is installed and sends signal, chip is received
Start timing after to signal and preserve.
5. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 1, its feature
It is：The approach switch signal source is electromagnetic wave signal source, and during mounting flange, electromagnetic wave signal source receives the electricity of return
Magnetic wave, which will be activated, sends signal, and chip, which is received, to be started timing and preserve after signal.
6. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 5, its feature
It is：Electromagnetic wave signal source produces electromagnetic wave and launched from end face of flange, circumference of flange or flange bolt hole, when there is outside
Object proximity end face of flange, close to circumference of flange or enter flange bolt hole, reflection of electromagnetic wave is returned, and proximity switch has
Exterior object is close or inserts the signal of flange, and this signal is transferred to chip.
7. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 1, its feature
It is：The flange body includes setting nonmagnetic material, institute in first flange body and second flange body, second flange body
State and magnet and sensor are mounted with nonmagnetic material, chip is buried in the second flange body, the first flange body is
Metal flange body.
8. a kind of method that can quickly read flange and the accumulative use time of pipeline according to claim 1, its feature
It is：It is non-that the flange body includes setting first in first flange body and second flange body, the first flange body
Installed in magnetic, the first nonmagnetic material and the second nonmagnetic material, the second nonmagnetic material are set in magnet, the second flange body
Inside it is provided with sensor, the second flange body and buries chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510773072.4A CN105299478B (en) | 2015-11-13 | 2015-11-13 | A kind of method that can quickly read flange and the accumulative use time of pipeline |
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| CN201510773072.4A CN105299478B (en) | 2015-11-13 | 2015-11-13 | A kind of method that can quickly read flange and the accumulative use time of pipeline |
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| TWI651661B (en) * | 2017-10-27 | 2019-02-21 | 吳仕賢 | Computer program product and method for identifying flange specifications |
| CN108194037B (en) * | 2017-12-22 | 2019-09-10 | 成都市卓新实业有限公司 | A kind of intelligent object |
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| CN2727941Y (en) * | 2004-09-07 | 2005-09-21 | 吴鹏伟 | RF circuit magnet-driven triggering device |
| CN102999767B (en) * | 2011-09-08 | 2015-10-21 | 北京同步科技有限公司 | Radio-frequency recognition system and radio communication control method |
| CN103425946B (en) * | 2012-05-14 | 2016-10-05 | 鸿富锦精密工业（深圳）有限公司 | Radio frequency identification control system |
| CN202992653U (en) * | 2012-11-06 | 2013-06-12 | 西安安特石油科技有限公司 | Digital detection system for state of fluid in pipeline |
| CN204215431U (en) * | 2014-07-28 | 2015-03-18 | 中国石油化工股份有限公司 | A kind of downhole radio-frequency identification label |
| CN104239921B (en) * | 2014-09-28 | 2018-01-30 | 青岛厚科信息工程有限公司 | A kind of underground utilities mark and real-time sounding gear |
| CN204303008U (en) * | 2014-12-22 | 2015-04-29 | 深圳中科讯联科技有限公司 | A kind of electronic tag |
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