CN106090631B - A kind of long oil pipeline road leak detecting device and detection method - Google Patents

A kind of long oil pipeline road leak detecting device and detection method Download PDF

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Publication number
CN106090631B
CN106090631B CN201610681821.5A CN201610681821A CN106090631B CN 106090631 B CN106090631 B CN 106090631B CN 201610681821 A CN201610681821 A CN 201610681821A CN 106090631 B CN106090631 B CN 106090631B
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China
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signal
oil pipeline
module
circuit
long oil
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CN201610681821.5A
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CN106090631A (en
Inventor
赵辉
李志成
张爱华
董海艳
张志强
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Bohai University
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Bohai University
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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
    • F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Pipeline Systems (AREA)

Abstract

The present invention relates to a kind of pipe detection device field, more particularly to a kind of long oil pipeline road leak detecting device and signal filtering method, in order to solve the problems, such as existing long oil pipeline road leak detection and positioner inaccuracy and filter effect deficiency, and a kind of long oil pipeline road leak detecting device and signal filtering method are provided, including controller module, power module, signal detection module and signal processing module；Controller module is provided with processor, and one end of signal processing module is connected with signal detection module, for receiving detection signal from signal detection module；The other end of signal processing module is connected with controller module, for the signal after being handled to controller module transmission.Present invention additionally comprises a kind of long oil pipeline road leakage detection method.The present invention is applied to pipeline leakage testing.

Description

A kind of long oil pipeline road leak detecting device and detection method
Technical field
The present invention relates to a kind of pipe detection device and method, and in particular to a kind of long oil pipeline road leak detecting device and Detection method.
Background technology
As scientific and technical innovation is horizontal and the continuous development of application field, information technology is in industrial production and society Increasing effect is played in terms of service, efficiency greatly improved, immeasurable tribute is made that for national development Offer.Particularly in field of industrial production, in real time and accurately detected object can be monitored using Automatic Measurement Technique, For the leakage detection method dedicated for long oil pipeline road, up to the present the method for wrong use is various, but these detection sides Method is not easy to safeguard, detects the shortcomings of inaccurate, leak position positioning is inaccurate mostly.Simultaneously as detection means is often in Field, solving problem caused by single battery powered mode needs relatively reliable technical scheme.In addition, environment at the scene In the case of relatively complicated, electrostatic interference or the Nature caused by because of extreme weather are put as caused by material friction in pipeline Electric and caused high-voltage impact etc. can all produce serious influence to detection means, it is therefore desirable to which detection means will be to sensor Signal is effectively filtered.
Reduction interference is filtered using digital filter in the prior art, in conventional mean filter method, when there is interference When pulse is scurried into, analog-digital converter is not easy to identify, therefore can be using disturbing pulse as effectively in data signal after conversion Signal component, this will necessarily produce certain error.Therefore, mean filter method can not remove noise, can only be in not half The upper influence for weakening interference signal.And median filtering method continuous sampling n times (N takes odd number) first, and by n times sampled value by size It is this virtual value that arrangement, which takes median, although the algorithm can effectively overcome fluctuates interference caused by accidentalia, can to temperature The slowly varying signal such as degree, liquid level carries out good filter effect, but poor to fast varying parameters effect, still up for changing Enter.
The content of the invention
The present invention is not enough to solve existing long oil pipeline road leak detection and positioner inaccuracy and filter effect And in the wild electricity suppl difficulty the problem of, and provide a kind of long oil pipeline road leak detecting device and detection method.
Long oil pipeline road leak detecting device includes：Controller module, signal detection module and signal processing module；
The controller module is provided with processor；
The signal detection module includes sensor interface, signaling conversion circuit；
The signal processing module includes signal front-end processing circuit and reference voltage circuit；The signal processing module One end is connected with the signal detection module, for receiving detection signal from the signal detection module；The signal transacting mould The other end of block is connected with the controller module, for the signal after being handled to the controller module transmission.
Long oil pipeline road leakage detection method, including：
Step 1：Signal after A/D is changed is divided into N groups and carries out continuous filtering, i.e., takes i data signal to make successively For one group, and i signal descending of each group is arranged；
Step 2：The signal of minimum is rejected from each group, and the signal of rejecting is saved in N+1 groups, again to each Group signal is assessed, and calculates signal averaging a againj, and each group signal error parameters ej；
Step 3：By each group average value signal ajIt is sequentially placed into set A, will be per grouping error parameter ejIt is sequentially placed into error In set E, and the filtering estimate that set A is added to obtain to N group signals with the parameter corresponding to each single item in set E isConduit running pressure state is judged according to filtering estimate.
The solution have the advantages that by setting solar panel, the uninterrupted of power supply during field work can be achieved Supply, adaptability are stronger；Pass through setting signal collection and process circuit so that device has powerful antijamming capability and hard Part filter capacity early stage；The filtering method of estimation that the processing of data signal is judged again after being rejected using interference signal, makes calculating Signal value can more stablize the running status for reacting oil pipeline exactly, make next step control action for detection means and provide more Reliable data foundation.
Brief description of the drawings
Fig. 1 is the structural representation of the long oil pipeline road leak detecting device of the present invention；
Fig. 2 is the flow chart of the long oil pipeline road leakage detection method of the present invention；
Fig. 3 is the signal detection module and signal of one specific embodiment of long oil pipeline road leak detecting device of the present invention The circuit structure diagram of processing module；
Fig. 4 is the circuit structure of the power module of long oil pipeline road one specific embodiment of leak detecting device of the present invention Figure；
Fig. 5 is the circuit of the reference voltage circuit of long oil pipeline road one specific embodiment of leak detecting device of the present invention Structure chart；
Fig. 6 is the circuit of the peripheral circuit socket of one specific embodiment of long oil pipeline road leak detecting device of the present invention Structure chart；
Fig. 7 is that the GPRS module interface signal of one specific embodiment of long oil pipeline road leak detecting device of the present invention is inserted The circuit structure diagram of seat；
Fig. 8 is the circuit of the condition prompting circuit of one specific embodiment of long oil pipeline road leak detecting device of the present invention Structure chart；
Fig. 9 is the circuit structure of the crystal oscillating circuit of long oil pipeline road one specific embodiment of leak detecting device of the present invention Figure；
Figure 10 is the circuit of the controller module of long oil pipeline road one specific embodiment of leak detecting device of the present invention Structure chart；
Embodiment
Embodiment one：As shown in figure 1, the long oil pipeline road leak detecting device of present embodiment, including：Control Device module 130, power module 140, signal detection module 110 and signal processing module 120；
The controller module 130 is provided with processor, the processor connection crystal oscillating circuit, reset circuit, condition prompting Circuit and peripheral interface socket；
The power module 140 include solar panel interface circuit, lithium battery charging circuit, charge protector, Power supply automatic switchover circuit and voltage conversion and mu balanced circuit；The power module is connected with the controller module, is used for Power supply is provided for the controller module；
The signal detection module 110 includes sensor interface, signaling conversion circuit；
The signal processing module 120 includes signal front-end processing circuit and reference voltage circuit；The signal transacting mould One end of block is connected with the signal detection module, for receiving detection signal from the signal detection module；At the signal The other end of reason module is connected with the controller module, for the signal after being handled to the controller module transmission.
Embodiment two：Present embodiment is unlike embodiment one：Peripheral interface socket includes control Signal plug, sensor signal socket and GPRS module interface signal socket processed.
The benefit so set is, by setting multiple interfaces socket, to enhance the scalability of device.
Other steps and parameter are identical with embodiment one.
Embodiment three：Present embodiment is unlike embodiment one or two：Solar panel connects Mouth circuit is connected with solar panel, and the solar panel interface circuit is provided with power output end and luminous energy quality is believed Number end, the solar panel is software cell panel.
The benefit so set is, by set solar panel device can with during field work power supply not between Cut-off is answered, and adaptability is stronger.
Other steps and parameter are identical with embodiment one or two.
Embodiment four：Unlike one of present embodiment and embodiment one to three：Sensor interface For connecting sensor, the sensor is 6 pressure wave sensors, is arranged on the outer surface of oil pipeline, and oil pipeline is horizontal A pressure wave sensor is installed every 60 degree in the outer in section.
The benefit so set is that 6 pressure wave sensors can be covered in the area of pipe circumference about 80% under illumination, easily Receive illumination in multi-angle large area.So also just solar panel is played one's part to the full, can be provided for device A large amount of electric energy.
Other steps and parameter are identical with one of embodiment one to three.
Embodiment five：Unlike one of present embodiment and embodiment one to four：Signal conversion electricity Road uses LTC6362 chips.
Other steps and parameter are identical with one of embodiment one to four.
Embodiment six：Unlike one of present embodiment and embodiment one to five：Front-end processing electricity Road uses LTC2380-24 chips, and LTC2380-24 chips are connected with the output end of LTC6362 chips；Front-end processing circuit is used for Hardware mean filter is carried out to the analog-digital conversion data of sensor signal.
Other steps and parameter are identical with one of embodiment one to five.
Embodiment seven：Unlike one of present embodiment and embodiment one to six：Front-end processing electricity 6 groups of LTC2380-24 chip circuits compositions are route, by 14 pins of previous LTC2380-24 chips and the latter LTC2380- The 12 pins connection of 24 chips, sequentially forms the serial connection of 6 chips.
Other steps and parameter are identical with one of embodiment one to six.
Embodiment eight：As shown in Fig. 2 present embodiments provide for a kind of long oil pipeline road leakage detection method, Including：
Step 1：Signal after A/D is changed is divided into N groups and carries out continuous filtering, i.e., takes i data signal to make successively For one group, and i signal descending of each group is arranged；
Step 2：The signal of minimum is rejected from each group, and the signal of rejecting is saved in N+1 groups, again to each Group signal is assessed, and calculates signal averaging a againj, and each group signal error parameters ej；
Step 3：By each group average value signal ajIt is sequentially placed into set A, will be per grouping error parameter ejIt is sequentially placed into error In set E, and the filtering estimate that set A is added to obtain to N group signals with the parameter corresponding to each single item in set E isConduit running pressure state is judged according to filtering estimate.
Embodiment nine：Present embodiment is unlike embodiment eight：Signal averaging ajForThe signal error parameters ejFor1≤i ≤ 100,1≤j≤i-1；The set A and set E is A={ a1 a2 ... aNAnd E={ e1 e2 ... eN}；The items Filtering estimate is
Other steps and parameter are identical with embodiment eight.
Embodiment ten：Present embodiment is unlike embodiment eight or nine：According to filtering estimate The detailed process for judging conduit running pressure state is：
Step 3 one：IfThe absolute difference of adjacent two data is before and after calculating Number whether more than N/2 times, if exceeding, judge pipeline leak, if not exceeded, then judge pipeline do not leak； The ε1For manifold pressure wave attenuation speed, 1≤m≤N；
Step 3 two：IfInterior data by it is intermittent it is irregular in the form of occur, using i signal as One group, the new data of N groups are gathered altogether, and calculate new filtering estimateExtracting should Minimum value in group dataAnd average valueIfThen judge that pipeline leaks, and otherwise judges do not occur Leakage；
The minimum value Average value isη is approximate pressure difference.
<Embodiment 1>
As shown in Figures 3 to 10, the long oil pipeline road leak detecting device is provided with controller mould to circuit of the embodiment of the present invention Block, power module, signal detection module, signal processing module；Controller module is provided with processor, processor is connected with crystal oscillator electricity Road, reset circuit, condition prompting circuit, and peripheral signal interface socket, these sockets include control signal, sensor signal And GPRS module interface signal；Crystal oscillating circuit uses 27.12MHz crystal oscillator, the 18pF electric capacity of both ends connection, while crystal oscillator two Hold and provide the clock cycle after being connected respectively with PIO0_8 the and PIO0_9 pins of LPC812M processors for processor；Reset circuit In directly will the electrically coupled in series 5.1K of 3.3V direct currents resistance pull-up after be directly connected with processor pin 4, that is, realize processor Automatically reset after upper electricity；Condition prompting circuit is to be connected at a light-emitting diode both ends with 3.3V power supplys and 820 Ω resistance respectively, It is connected after current limliting with the PIO0_11 pins of processor, processor sends low level signal to the pin during use can put brighten the hair Optical diode, the prompting of running status is realized, also can be by controlling glow frequency to assign obstructed prompting implication to it.
In peripheral signal socket 1 to 8 pin of GPRS module respectively PIO0_17, PIO0_3 with processor, PIO0_4, PIO0_13, PIO0_2, PIO0_0, PIO0_6 and PIO0_4 pin are corresponding to be connected, during use processor by the interface to GPRS Accessing time sequence signal is sent, realizes wireless receiving and the transmission of data；In peripheral signal socket JP19 1-3 pins respectively with PIO0_1, PIO0_15 of processor connect with PIO0_7 pins, at the same pin PIO0_1 also with solar cell in power module Plate interface unit JP6 pin 3 (i.e. test) pin connection, during use processor by detecting PIO0_9 leg signal states, The solar panel quality of power supply is judged, to make the action of power supply switching exactly.
It is automatic that power module is provided with solar panel interface unit, lithium battery charging circuit, charge protector, power supply Switching circuit, multiple voltage conversion-mu balanced circuit；The solar panel interface circuit is connected with solar panel, should Solar panel is software cell panel, can surface mount in oil pipeline outer rim, be covered in exposed tube with illumination at least 80% area, it is easy to multi-angle large area and receives illumination；Circuit interface JP6 power output end pin 1,2 respectively with relay Two pins connection of device K1 upper end, power output end pin 1 are also connected with 0 resistance R35 one end of lithium battery charging circuit, The other end of the resistance is connected with 0.01pF filter capacitors C25 and chip TP4056 pin 8 and 4 respectively, the use of 8 pins is energy Chip operation, and charging chip circuit is introduced by 4 pins, start to charge to lithium battery, processor is by accessing lithium battery The LPC_tem pins of circuit obtain charging circuit temperature, judge charging circuit working condition indirectly；In order to prevent excessive fill Electrical phenomena, chip TP4056 pin 5 is connected with the pin 5 of DW01 chips in power supply automatic switchover circuit, while chip 4, the 6 pins connection with the GTT8205S of chip respectively of DW01 pin 3,1, chip GTT8205S can realize overcurrent here Acted on overvoltage protection, and charging circuit can be automatically cut off in balance of voltage state platform, connected automatically in the case of unbalance Charging circuit, it is lithium cell charging；Power supply automatic switchover circuit be by chip DW01 pin 5 by 100 Ω resistance current limlitings after It is connected, the coil control terminal LPC_turn and processor of relay pin PIO0_15 connections, uses with another pin of relay When, processor to the pin sends high level signal, and then relay coil closes, and now lithium battery is as power source, if to this Pin sends low level signal, and then relay coil is opened, and now solar energy is as power source, when in white in actual use It when be actively switched to solar powered state, now solar powered interface is then used for lithium cell charging, night Lithium battery power supply；In multiple voltage conversion-mu balanced circuit by the 12V DC electricity of access by 0.33uF ceramic disc capacitors filtering after with Voltage stabilizing chip LM7805 pin 1 connects, and the 5V voltages obtained after the chip transformation have pin 3 to export, while in order to obtain 3.3V DC voltages are obtained, LM7805 pin 3 is connected with chip SX2106 pins 5, by drawing after the processing of SX2106 chips The series connection 4.7uH inductance of pin 6, is further continued for obtaining stable 3.3V voltages after resistance-capacitance network realizes High frequency filter, then Input of the voltage as chip ASM1117-2.5,2.5V voltages are obtained after voltage conversion；
Signal detection module is provided with sensor interface, signaling conversion circuit, signal processing module；The sensor is pressure Wave sensor, 6 pressure wave sensors are shared in of the invention, the outer surface of oil pipeline are mounted on, with a certain cross section of pipeline Outer rim every 60 degree uniformly installation one pressure wave sensor；The signaling conversion circuit is used to believe using LTC6362 chips Number level conversion and reduce power consumption.The signal processing module is provided with signal front-end processing circuit and reference voltage electricity Road, front-end processing circuit use LTC2380-24, and the chip is connected with the output end of LTC6362 chips, realize and sensor is believed Number analog-to-digital conversion and hardware mean filter；Simultaneously in order to meet the processing of 6 pressure wave sensor signals, the present invention shares 6 Group LTC2380-24 chip circuits composition, by 14 pins of previous LTC2380-24 chips it is SDO signal and the latter in circuit 12 pins of LTC2380-24 chips are RDL/SDI connections, are sequentially completed the serial connection of 6 chips；The reference voltage electricity Road uses LTC6655 chips to provide reference voltage for signal processing circuit and signal detection module.
The signal filtering method of long oil pipeline road leak detecting device, it is contemplated that oil pipeline leakage process occurs first The change of concussion property occurs for manifold pressure ripple, will then enter the stable of pressure wave and decline or compared under non-leak condition Pressure wave number is lower；Therefore a kind of reliably signal filtering method is needed to ensure that long oil pipeline road leak detecting device avoids it from going out Existing error detection.Signal after A/D is changed is divided into N groups first and carries out continuous filtering by this filtering method, will preceding i number Word signal arranges i signal descending in the group as the 1st group, then rejects the signal of minimum from the group, and should Reject signal and be saved in N+1 groups, the 1st group of signal is assessed again, evaluation process is as follows：
Assuming that signal is respectively in new the 1st group：X1={ x1,1 x1,2 ... x1,i-1, then calculate signal averaging A1, And this group of signal error parameters e1, wherein
Similarly, after the 2nd group of signal rejects minimum value, and the 2nd group of rejecting signal is saved in N+1 groups, again to the 2nd group Signal is assessed.
Assuming that signal is respectively in new the 2nd group：X2={ x2,1 x2,2 ... x2,i-1, then calculate signal averaging a2, And this group of signal error parameters e2, wherein
Remaining N-2 groups by that analogy, will finally obtain each group average value signal and be sequentially placed into set A, every group is missed Poor parameter is sequentially placed into error set E；Therefore there are A={ a1 a2 ... aN}；E={ e1 e2 ... eN}；Now by A and E Parameter corresponding to middle each single item, which is added, isThen obtain the filter of N number of signal Ripple estimate isAnd using this as judging the foundation of pipeline pressure state, and then judge that pipeline is transported Row situation.
If now occur obviousThen illustrate that now leak condition occurs in oil pipeline, further Ground is by the absolute difference of adjacent two data before and after calculatingNumber whether more than N/2 times, ε here1For State parameter, take 0.1MPa；Manifold pressure wave attenuation speed is represented, reflects pipeline leakage degree indirectly；1≤m of parameter ≤N。
IfInterior data occur in the form of intermittence is irregular, then need to determine whether, now Continue to gather new data, be equally using i signal as one group, gather N group data altogether, and calculate new filtering estimateThe minimum value taken out in this group of data calculatesAnd Average value beIfThen illustrate that pipeline leaks, be otherwise considered as normal operation, here parameter η =0.25MPa, it is approximate pressure difference.
It is stronger that the uninterrupted supply of power supply, adaptability during field work can be achieved in the present invention；Signal sampling and processing circuit With powerful antijamming capability and hardware filter capacity early stage；The digital processing of signal and judge to pick using interference signal Except filtering method is judged again, the signal value of calculating is more reacted the running status of oil pipeline smooth steady, filled for detection Put and next step control action offer more reliable data foundation is provided.

Claims (9)

  1. A kind of 1. long oil pipeline road leakage detection method, it is characterised in that
    Methods described is realized based on long oil pipeline road leak detecting device, and long oil pipeline road leak detecting device includes：
    Controller module, power module, signal detection module and signal processing module；
    The controller module is provided with processor, the processor connection crystal oscillating circuit, reset circuit, condition prompting circuit and Peripheral interface socket；
    It is automatic that the power module includes solar panel interface circuit, lithium battery charging circuit, charge protector, power supply Switching circuit and voltage conversion and mu balanced circuit；The power module is connected with the controller module, for for the control Device module processed provides power supply；
    The signal detection module includes sensor interface, signaling conversion circuit；
    The signal processing module includes signal front-end processing circuit and reference voltage circuit；One end of the signal processing module Connected with the signal detection module, for receiving detection signal from the signal detection module；The signal processing module The other end is connected with the controller module, for the signal after being handled to the controller module transmission；
    Methods described includes：
    Step 1：Signal after A/D is changed is divided into N groups and carries out continuous filtering, i.e., takes i data signal successively as one Group, and i signal descending of each group is arranged；
    Step 2：The signal of minimum is rejected from each group, and the signal of rejecting is saved in N+1 groups, each group is believed again Number assessed, calculate signal averaging a againj, and each group signal error parameters ej；
    Step 3：By each group signal averaging ajIt is sequentially placed into set A, will be per grouping error parameter ejIt is sequentially placed into error set E, and The filtering estimate that set A is added to obtain to N group signals with the parameter corresponding to each single item in set E is Conduit running pressure state is judged according to filtering estimate.
  2. 2. a kind of long oil pipeline road leakage detection method according to claim 1, it is characterised in that the peripheral interface is inserted Seat includes control signal socket, sensor signal socket and GPRS module interface signal socket.
  3. A kind of 3. long oil pipeline road leakage detection method according to claim 1, it is characterised in that the solar cell Plate interface circuit is connected with solar panel, and the solar panel interface circuit is provided with power output end and luminous energy matter Signal end is measured, the solar panel is software cell panel.
  4. A kind of 4. long oil pipeline road leak detecting device according to claim 3, it is characterised in that the sensor interface For connecting sensor, the sensor is 6 pressure wave sensors, is arranged on the outer surface of oil pipeline, and oil pipeline is horizontal A pressure wave sensor is installed every 60 degree in the outer in section.
  5. A kind of 5. long oil pipeline road leak detecting device according to claim 4, it is characterised in that the signal conversion electricity Road uses LTC6362 chips.
  6. A kind of 6. long oil pipeline road leak detecting device according to claim 5, it is characterised in that the front-end processing electricity Road uses LTC2380-24 chips, and LTC2380-24 chips are connected with the output end of LTC6362 chips；The front-end processing circuit For carrying out hardware mean filter to the analog-digital conversion data of sensor signal.
  7. A kind of 7. long oil pipeline road leak detecting device according to claim 6, it is characterised in that the front-end processing electricity 6 groups of LTC2380-24 chip circuits compositions are route, by 14 pins of previous LTC2380-24 chips and the latter LTC2380- The 12 pins connection of 24 chips, sequentially forms the serial connection of 6 chips.
  8. A kind of 8. long oil pipeline road signal filtering method according to claim 1, it is characterised in that the signal averaging ajForThe signal error parameters ejFor xj,kFor k-th of signal of jth group；The set A and set E is A={ a1 a2 ... aNAnd E={ e1 e2 ... eN}；Institute Stating each element filtered in estimate is
  9. 9. a kind of long oil pipeline road signal filtering method according to claim 8, it is characterised in that described to be estimated according to filtering Evaluation judges that the detailed process of conduit running pressure state is：
    Step 3 one：IfThe absolute difference of adjacent two data is before and after calculatingTime Whether number is more than N/2 times, if exceeding, judges that pipeline leaks, if not exceeded, then judging that pipeline does not leak；It is described ε1For manifold pressure wave attenuation speed, 1≤m≤N；
    Step 3 two：IfInterior data occur in the form of intermittence is irregular, using i signal as one group, The new data of N groups are gathered altogether, and calculate new filtering estimateExtract this group of data In minimum valueAnd average valueIfThen judge that pipeline leaks, and otherwise judges not leak；
    The minimum valueAverage valueForη is approximate pressure difference.
CN201610681821.5A 2016-08-17 2016-08-17 A kind of long oil pipeline road leak detecting device and detection method Expired - Fee Related CN106090631B (en)

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CN106594526B (en) * 2016-12-02 2019-04-12 上海环宇消防集团有限公司 A kind of water supply network state monitoring method and device based on hydraulic pressure sampled data
CN110646682B (en) * 2019-09-23 2021-06-22 辽宁工程技术大学 System for monitoring interference potential of metal buried pipeline in real time

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CN1101914C (en) * 2001-05-31 2003-02-19 山东新大通石油环保科技股份有限公司 Transportation pipeline leakage monitoring and locating method and system
JP5311771B2 (en) * 2007-06-23 2013-10-09 フジテコム株式会社 Leak detection device
CN201502870U (en) * 2009-08-05 2010-06-09 哈尔滨理工大学 Oil delivery pipeline leakage detecting and positioning device based on GPRS
CN103438359A (en) * 2013-08-06 2013-12-11 毛振刚 Oil pipeline leakage detection and positioning system
CN205090197U (en) * 2015-07-09 2016-03-16 南京声宏毅霆网络科技有限公司 Leak detection system and monitoring facilities of pipeline
CN105423137A (en) * 2015-12-28 2016-03-23 安阳师范学院 Gas network leakage transient pressure wave detection and analysis system and detection and analysis method
CN205424434U (en) * 2016-04-01 2016-08-03 李文秀 Oil gas pipeline that can fix a position leaks alarm

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