CN101684892B - Signal transmission device for pipeline detection, pipeline detection device and method - Google Patents
Signal transmission device for pipeline detection, pipeline detection device and method Download PDFInfo
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- CN101684892B CN101684892B CN2008101688314A CN200810168831A CN101684892B CN 101684892 B CN101684892 B CN 101684892B CN 2008101688314 A CN2008101688314 A CN 2008101688314A CN 200810168831 A CN200810168831 A CN 200810168831A CN 101684892 B CN101684892 B CN 101684892B
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Abstract
The invention provides a signal transmission device for pipeline detection, a pipeline detection device and a method, and the signal transmission device comprises a plurality of switching steps of which each is provided with at least one transfer switch and at least one control circuit, wherein each transfer switch in the first switching step is used for receiving multi-path detecting signals of a plurality of sensors in each probe simultaneously, the transfer switches in other switching steps are used for receiving multi-path detection signals from the previous switching step simultaneously, and each control circuit is used for controlling output of the transfer switch connected with the control circuit to lead the multi-path detection signals received by the transfer switch to be output in the mode of time division multiplexing. By using the mode of time division multiplexing in the invention, the usage amount of cables is greatly reduced; the functions of hundreds of output cables in the prior art can be realized by hundreds of probes through using less output cables, thus breaking over the technical bottleneck in the prior art and further improving resolution.
Description
Technical field
The present invention relates to the pipeline detection technology, more specifically, relate to a kind of signal transmitting apparatus and in-pipeline detection device and method that is used for pipeline detection.
Background technology
Oil and gas pipes is carried has become the main means that the domestic and international energy is carried, and pipeline detection has become generally acknowledged pipe detection means.A plurality of probes that existing in-pipeline detection device comprises cavity, is arranged in the data processing equipment of cavity, be electrically connected through signal transmitting apparatus with this data processing equipment and at least two leather cups on the excircle that is axially fixed in this cavity of this cavity.Wherein each probe all comprises a plurality of sensors; Be used to detect inner-walls of duct; A plurality of sensors are input to detected multichannel detection signal in the data processing equipment through the lead-in wire that is connected on the probe, and said data processing equipment is used for the multichannel detection signal that receives is converted to the detection data and stores said detection data.Signal transmitting apparatus of the prior art is to utilize signal socket connector that detection signal is imported in the data processing equipment through the mode of the single lead-in wire of single probe.
Along with the development of pipeline detection, the resolution that improves pipeline detection has become the main developing goal of this area, that is to say that the number of the probe that on unit length, distributes is many more, and the resolution of detection is also just high more.At present, resolution has had the lifting of several times and even tens times, and probe quantity also is being on the increase, and adopts the mode of the single lead-in wire of single probe to carry out the signal transmission like this, and will cause needs the hundreds of bars cables of use and hundreds of signal socket connectors.And be very difficult in the cavity that cable that will be a large amount of like this and connector are placed in pipeline detection equipment, this technical bottleneck has had a strong impact on the raising of sharpness and technical feature.
Summary of the invention
The present invention is directed to the signal transmission that is used for pipeline detection in the prior art use cable, connector too much, be unfavorable for the shortcoming of installing a kind of cable signal transmitting apparatus that is used for pipeline detection less, simple in structure relatively and in-pipeline detection device and method used being provided.
Inventor of the present invention expects if can use multiplexing technique in the communications field to the deficiency that exists in the above-mentioned prior art, makes the multichannel detection signal to spread out of through a circuit, will well solve the too much problem of cable.Multiplexing technique comprises time division multiplex, frequency division multiplexing, code division multiplexing or the like; Wherein time division multiplex (TDMA) technology is that more a kind of communication mode is used in the communications field; Its principle is that various signals is distributed in the different time section along same Channel Transmission, and this technology can be at same channel multiple signals.Inventor of the present invention has used for reference this time-division multiplex technology in the communications field, applies it to the side signal transmission face in the pipeline detection.
The present invention provides a kind of signal transmitting apparatus that is used for pipeline detection; Wherein this device comprises a plurality of stage of switches; Each stage of switches comprises at least one change-over switch and at least one control circuit that is connected with each change-over switch; The input end of the change-over switch in the output terminal of the change-over switch in two adjacent stage of switches in the previous stage of switches and the back stage of switches is connected; The change-over switch that each stage of switches is included and the number of control circuit begin to successively decrease step by step from first stage of switches; First stage of switches comprises a plurality of change-over switches and a plurality of control circuit; Each change-over switch in said first stage of switches is used for receiving simultaneously the multichannel detection signal from a plurality of sensors of each probe; Change-over switch in all the other stage of switches is used for receiving the multichannel detection signal from previous stage of switches simultaneously, and each control circuit is used to control the output of the change-over switch that is connected with this control circuit, so that the multichannel detection signal that this change-over switch receives is exported with time-multiplexed mode successively.
The present invention also provides a kind of in-pipeline detection device; This device comprises cavity, a plurality of probe, at least two leather cups, signal transmitting apparatus and data processing equipments; Said at least two leather cups are on the excircle that is axially fixed in this cavity of this cavity; Said a plurality of probe is positioned at outside the cavity, and said data processing equipment is arranged in said cavity, and said a plurality of probes are connected with said data processing equipment through said signal transmitting apparatus; Each probe comprises a plurality of sensors; Be used to detect inner-walls of duct, a plurality of sensors are transferred to detected multichannel detection signal in the data processing equipment through signal transmitting apparatus, and said data processing equipment is used for the detection signal that receives is converted to the detection data and stores said detection data; Wherein, Said signal transmitting apparatus is the signal transmitting apparatus that is used for pipeline detection provided by the invention; Wherein each change-over switch in first stage of switches respectively with each probe in a plurality of sensors be connected, the change-over switch in last stage of switches is connected to the input end of said data processing equipment.
The present invention provides a kind of pipeline detection method again, and this method may further comprise the steps:
Use a plurality of sensor inner-walls of duct in a plurality of probes, a plurality of sensor outputs are used to characterize the multichannel detection signal of inner-walls of duct characteristic;
Switch the multichannel detection signal with multistage time-multiplexed mode, make the multichannel detection signal output to data processing equipment successively; And
The detection signal of data processing equipment after with the time division multiplex that receives converts to and detects data and store said detection data.
The time division multiplex that the signal transmitting apparatus that is used for pipeline detection provided by the invention utilizes first stage of switches to accomplish the multichannel detection signal of a plurality of sensors of probe is switched; The time division multiplex of utilizing other at least one stage of switches to accomplish the multichannel detection signal of a plurality of probe outputs is then switched; Like this through multistage time-multiplexed mode made full use of time division multiplex through a route cable just can outputting multiplex signals characteristics, thereby significantly reduced the use amount of cable.As utilize the signal transmitting apparatus that is used for pipeline detection provided by the invention; Up to a hundred probes only need to use less output cable just can accomplish the function of up to a hundred output cables in the prior art; Broken through technical bottleneck of the prior art, can be so that resolution further significantly improves.Equally; In-pipeline detection device provided by the invention is owing to used such signal transmitting apparatus; The pipeline detection method makes the signal cable amount that is connected to data processing equipment reduce greatly owing to adopted multistage time division multiplexing mode, is convenient to the installation in cavity.
Description of drawings
Fig. 1 connects block diagram for the circuit that is used for the signal transmitting apparatus of pipeline detection provided by the invention;
Fig. 2 is the structural drawing of in-pipeline detection device provided by the invention;
Fig. 3 is that the circuit of in-pipeline detection device provided by the invention connects block diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Referring to Fig. 1; The signal transmitting apparatus that is used for pipeline detection provided by the invention comprises a plurality of stage of switches 10; Each stage of switches 10 comprises at least one change-over switch 1 and at least one control circuit 2 that is connected with each change-over switch 1; The input end of the change-over switch 1 in the output terminal of the change-over switch 1 in two adjacent stage of switches 10 in the previous stage of switches 10 and the back stage of switches 10 is connected; The change-over switch 1 that each stage of switches 10 is included and the number of control circuit 2 are successively decreased from first stage of switches 10 beginnings step by step; First stage of switches 10 comprises a plurality of change-over switches 1 and a plurality of control circuits 2; Each change-over switch 1 in said first stage of switches 10 is used for receiving the multichannel detection signal from a plurality of sensors of each probe; Change-over switch 1 in all the other stage of switches 10 is used to receive the multichannel detection signal from previous stage of switches 10, and each control circuit 2 is used to control the output of the change-over switch 1 that is connected with this control circuit 2, so that the multichannel detection signal that this change-over switch 1 receives is exported with time-multiplexed mode successively.
The time division multiplex of mentioning among the present invention is synchronous time division multiplexing.For time-multiplexed mode, the present invention is not special to be limited, and can adopt the time division multiplexing mode of common use in the prior art.
A plurality of stage of switches 10 are set to: first stage of switches 10 is used to switch the multichannel detection signal of a plurality of sensor outputs in the probe, and all the other stage of switches 10 are used to switch the multichannel detection signal of a plurality of probe outputs.Generally speaking, the number of stage of switches 10 is two and promptly can meets the demands.And when probe quantity is too much, can probe be divided into a plurality of groups, can select plural stage of switches 10 this moment; Three stage of switches 10 for example; At this moment the function of first stage of switches 10 is constant, and second 10 of stage of switches is used to switch the multichannel detection signal of a plurality of probe outputs in one group of probe, and the 3rd stage of switches 10 then is used to switch the multichannel detection signal of many group probes output; The one-level one-level is switched like this, can reduce the use amount of cable in a large number.
Owing to adopt multistage switching way; The number of change-over switch 1 and control circuit 2 is successively decreased from first stage of switches 10 beginnings step by step; The change-over switch 1 that comprises in first stage of switches 10 and the number of control circuit 2 equal number of sensors, comprise a change-over switch and a control circuit in last stage of switches 10.
Said change-over switch 1 can be for CMOS simulates integrated switch, and control circuit 2 can be controlled the level of the control end of CMOS simulation integrated switch and just control the break-make that CMOS simulates integrated switch.Wherein, the conversion of voltage is connected to filter capacitor between the adjacent input end of a plurality of change-over switches in first stage of switches in order to take over seamlessly.
Said control circuit 2 can control its switch 1 carry out the circuit that time division multiplex is switched for any; For example DSP control circuit, FPGA control circuit, single-chip microcomputer or the like; Be preferably the FPGA control circuit; Programme through FPGA and to control corresponding change-over switch 1, make change-over switch 1 switch with time-multiplexed mode.Because the use of a large amount of change-over switches 1 can cause signal to disturb, use the FPGA control circuit can design high anti-interference inhibition program structure phaselocked loop therein and suppress to disturb.
Wherein, said control circuit 2 adopts A/D EOC pulse signal as switching the telltale mark signal.Said A/D EOC pulse signal from data processing equipment that this signal transmitting apparatus is connected in A/D converter.This A/D EOC pulse signal is to be convenient to control circuit 2 to confirm that one takes turns to switch to accomplish and restarts a new round and switch.
In addition, the control circuit 2 in the previous stage of switches 10 also with a back stage of switches 10 in change-over switch 1 be connected, after connecting like this, the control circuit 2 in a plurality of stage of switches 10 can communicate with one another to keep synchronous.
Referring to Fig. 2; In-pipeline detection device provided by the invention comprises cavity 40, a plurality of probe 20, at least two leather cups 50, signal transmitting apparatus (not shown) and data processing equipments 30; Said at least two leather cups 50 are on the excircle that is axially fixed in this cavity 40 of this cavity 40; Said a plurality of probe 20 is positioned at outside the cavity 40, and said data processing equipment 30 is arranged in said cavity 40, and said a plurality of probes 20 are connected with said data processing equipment 30 through said signal transmitting apparatus; Each probe 20 comprises a plurality of sensors (not shown); Be used to detect inner-walls of duct, a plurality of sensors are transferred to detected multichannel detection signal in the data processing equipment 30 through signal transmitting apparatus, and said data processing equipment 30 is used for the detection signal that receives is converted to the detection data and stores said detection data; Wherein, Said signal transmitting apparatus is the above-mentioned signal transmitting apparatus that is used for pipeline detection; Referring to Fig. 3; Wherein each change-over switch 1 in first stage of switches 10 is connected with a plurality of sensors of each probe in 20 respectively, and the change-over switch 1 in last stage of switches 10 is connected to the input end of said data processing equipment 30.
Get in the cavity 40 for fear of a large amount of cables, under the preferable case, last stage of switches 10 is arranged in said cavity 40, and all the other stage of switches 10 are positioned at outside the said cavity 40, and constitute coupling probe with said a plurality of probes 20.
Wherein said sensor can be for the angular transducer that for example is used to detect reducing, be used to magneto-dependent sensor that detects inner surface cracks, corrosion or the like other defect or the like, can select as required.
Said leather cup 50 can comprise and supports leather cup and driving leather, supports leather cup and mainly plays a supporting role, and driving leather is mainly used in pressure differential through liquid in the pipeline or gas and drives in-pipeline detection device and in pipeline, advance.
Said data processing equipment 30 comprises A/D converter and storer; A/D converter respectively with last stage of switches 10 in change-over switch 1, control circuit 2 and said storer be connected; A/D converter receives the detection signal after change-over switch 1 time division multiplex in last stage of switches 10, this detection signal is carried out A/D convert to and detect data and store in the storer with to be analyzed.As previously mentioned, A/D converter also offers control circuit 2 with A/D EOC pulse signal as switching the telltale mark signal.
The present invention to said cavity 40, leather cup 50 is not special limits, and can adopt various suitable cavitys and leather cup, do not influence and reach the object of the invention.
Pipeline detection method provided by the invention may further comprise the steps:
Use a plurality of sensor inner-walls of duct in a plurality of probes 20, a plurality of sensor outputs are used to characterize the multichannel detection signal of inner-walls of duct characteristic;
Switch the multichannel detection signal with multistage time-multiplexed mode, make the multichannel detection signal output to data processing equipment 30 successively; And
The detection signal of data processing equipment 30 after with the time division multiplex that receives converts to and detects data and store said detection data.
Wherein so-called multistage time division multiplex is meant with the multichannel detection signal stage of switches through a plurality of employing time division multiplexing mode step by step; Make the multichannel detection signal can on less (for example one) signal cable, export on time division multiplex ground at last; Thereby reach goal of the invention of the present invention, reduce the use amount of cable.Be preferably the two-stage time division multiplex.Wherein first order time division multiplex is that the multichannel detection signal of a plurality of sensor outputs in the probe 20 is exported as the detection signal of probe output with time-multiplexed mode successively, and second level time division multiplex is that the multichannel detection signal that a plurality of probes 20 are exported is outputed to data processing equipment 30 with time-multiplexed mode.
As previously mentioned, in the process of switching the multichannel detection signal, can adopt A/D EOC pulse signal as switching the telltale mark signal, to be used to determine when the switching of a beginning new round.
Method provided by the invention can use the above-mentioned signal transmitting apparatus that is used for pipeline detection to implement, but does not get rid of the embodiment of other signal transmitting apparatus that those skilled in the art can expect according to the description of this method.
The detection signal of mentioning among the present invention can be the detection signal of various sign inner-walls of duct characteristics; For example can be the angle detection signal of detector tube road inwall reducing or the Magnetic Flux Leakage Inspecting signal of detection pipeline inner wall defect (crackle, corrosion or the like), but be not limited thereto.
Claims (16)
1. signal transmitting apparatus that is used for pipeline detection; Wherein this device comprises a plurality of stage of switches (10); Each stage of switches (10) comprises at least one change-over switch (1) and at least one control circuit (2) that is connected with each change-over switch (1); The input end of the change-over switch (1) in the output terminal of the change-over switch (1) in adjacent two stage of switches (10) in the previous stage of switches (10) and the back stage of switches (10) is connected; The change-over switch (1) that each stage of switches (10) is included and the number of control circuit (2) are successively decreased from first stage of switches (10) beginning step by step; First stage of switches (10) comprises a plurality of change-over switches (1) and a plurality of control circuit (2); Each change-over switch (1) in said first stage of switches (10) is used for receiving simultaneously the multichannel detection signal from a plurality of sensors of each probe; Change-over switch (1) in all the other stage of switches (10) is used for receiving simultaneously the multichannel detection signal from previous stage of switches (10); Each control circuit (2) is used for controlling the output of the change-over switch (1) that is connected with this control circuit (2), so that the multichannel detection signal that this change-over switch (1) receives is exported with time-multiplexed mode successively.
2. according to the said signal transmitting apparatus of claim 1, the number of wherein said a plurality of stage of switches (10) is two, and last stage of switches (10) comprises a change-over switch (1) and a control circuit (2).
3. signal transmitting apparatus according to claim 1, wherein said control circuit (2) adopt A/D EOC pulse signal as switching the telltale mark signal.
4. signal transmitting apparatus according to claim 3; Control circuit (2) in the wherein previous stage of switches (10) also with a back stage of switches (10) in change-over switch (1) be connected so that the control circuit (2) in a plurality of stage of switches (10) keeps synchronously.
5. signal transmitting apparatus according to claim 1, wherein said change-over switch (1) is CMOS simulation integrated switch.
6. signal transmitting apparatus according to claim 1 is connected to filter capacitor between the adjacent input end of a plurality of change-over switches (1) in wherein said first stage of switches (10).
7. according to the described signal transmitting apparatus of each claim among the claim 1-6, wherein said control circuit (2) is the FPGA control circuit.
8. in-pipeline detection device; This device comprises cavity (40), a plurality of probe (20), at least two leather cups (50), signal transmitting apparatus and data processing equipment (30); Said at least two leather cups (50) are on the excircle that is axially fixed in this cavity (40) of this cavity (40); Said a plurality of probe (20) is positioned at outside the cavity (40); Said data processing equipment (30) is arranged in said cavity (40); Said a plurality of probe (20) is connected with said data processing equipment (30) through said signal transmitting apparatus, and each probe (20) comprises a plurality of sensors, is used to detect inner-walls of duct; A plurality of sensors are transferred to detected multichannel detection signal in the data processing equipment (30) through signal transmitting apparatus, and said data processing equipment (30) is used for the detection signal that receives is converted to the detection data and stores said detection data; Wherein, Said signal transmitting apparatus is according to the described signal transmitting apparatus that is used for pipeline detection of each claim among the claim 1-7; Wherein each change-over switch (1) in first stage of switches (10) respectively with each probe (20) in a plurality of sensors be connected, the change-over switch (1) in last stage of switches (10) is connected to the input end of said data processing equipment (30).
9. in-pipeline detection device according to claim 8, wherein last stage of switches (10) is arranged in said cavity (40), and all the other stage of switches (10) are positioned at outside the said cavity (40), and constitute coupling probe with said a plurality of probes (20).
10. in-pipeline detection device according to claim 8; Wherein said data processing equipment (30) comprises A/D converter and storer; A/D converter respectively with last stage of switches (10) in change-over switch (1), control circuit (2) and said storer be connected; A/D converter is used for receiving the detection signal after change-over switch (1) time division multiplex of last stage of switches (10); This detection signal is carried out A/D convert to and detect data and store in the storer, said A/D converter also offers control circuit (2) with A/D EOC pulse signal as switching the telltale mark signal.
11. one kind is used for according to Claim 8 to the pipeline detection method of 10 each described in-pipeline detection devices, this method may further comprise the steps:
Use a plurality of sensor inner-walls of duct in a plurality of probes, a plurality of sensor outputs are used to characterize the multichannel detection signal of inner-walls of duct characteristic;
Switch the multichannel detection signal with multistage time-multiplexed mode, make the multichannel detection signal output to data processing equipment successively; And
The detection signal of data processing equipment after with the time division multiplex that receives converts to and detects data and store said detection data.
12. method according to claim 11, wherein multistage time division multiplex is the two-stage time division multiplex.
13. method according to claim 12; Wherein first order time division multiplex is that the multichannel detection signal of a plurality of sensor outputs in the probe is exported as the detection signal of probe output with time-multiplexed mode successively, and second level time division multiplex is that the multichannel detection signal that a plurality of probes are exported is outputed to data processing equipment with time-multiplexed mode.
14. method according to claim 11 wherein in the process of switching the multichannel detection signal, adopts A/D EOC pulse signal as switching the telltale mark signal.
15. method according to claim 11, wherein multistage time division multiplex is a synchronous time division multiplexing.
16. according to the described method of each claim among the claim 11-15, wherein said detection signal is angle detection signal that detects the inner-walls of duct reducing or the Magnetic Flux Leakage Inspecting signal that detects the pipeline inner wall defect.
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| CN2008101688314A CN101684892B (en) | 2008-09-28 | 2008-09-28 | Signal transmission device for pipeline detection, pipeline detection device and method |
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| CN101907461B (en) * | 2010-06-24 | 2012-07-04 | 西安电子科技大学 | Measuration data correlation method for passive multisensor based on angle cotangent value |
| CN103792413A (en) * | 2014-01-28 | 2014-05-14 | 中国海洋石油总公司 | Multi-channel weak signal acquisition circuit |
| CN104034796B (en) * | 2014-06-16 | 2016-09-28 | 东北大学 | Detection generating date device and method in a kind of pipe leakage |
| CN107290391B (en) * | 2017-07-25 | 2023-03-28 | 中国石油化工股份有限公司 | Oil-gas detector based on linear semiconductor and detection method |
| CN108120852B (en) * | 2017-11-24 | 2020-03-20 | 清华大学 | Multi-probe time-sharing multiplexing device, flow velocity measuring device and method |
| CN115542205A (en) * | 2022-11-24 | 2022-12-30 | 杭州慧翔电液技术开发有限公司 | System and method for monitoring magnetic field of superconducting magnet in real time |
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Effective date of registration: 20160628 Address after: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee after: Sinopec Corp. Patentee after: SINOPEC LONG DISTANCE OIL AND GAS PIPELINES DETECTION CO., LTD. Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee before: Sinopec Corp. |
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Address after: 100029, No. 6, Xin Xin Street East, Beijing, Chaoyang District Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Pipe network group (Xuzhou) pipeline inspection and Testing Co., Ltd Address before: 100029, No. 6, Xin Xin Street East, Beijing, Chaoyang District Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: Sinopec long distance oil and Gas Pipeline Inspection Co., Ltd |
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