CN106767462A - Pipe thickness on-line computing model, system and method - Google Patents
Pipe thickness on-line computing model, system and method Download PDFInfo
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- CN106767462A CN106767462A CN201710114658.9A CN201710114658A CN106767462A CN 106767462 A CN106767462 A CN 106767462A CN 201710114658 A CN201710114658 A CN 201710114658A CN 106767462 A CN106767462 A CN 106767462A
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- Prior art keywords
- terahertz
- tube wall
- measured
- pipe thickness
- detection ripple
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
Abstract
The present invention relates to a kind of pipe thickness on-line computing model, system and method, the pipe thickness on-line computing model includes Terahertz generating means and Terahertz reception device, Terahertz generating means is used to produce terahertz detection ripple and launches to tube wall to be measured, Terahertz reception device is used to receive the terahertz detection ripple through the tube wall to be measured, to obtain the thickness of the tube wall to be measured through the decay occurred after the tube wall to be measured according to the terahertz detection ripple；When being detected to pipe thickness, the Terahertz generating means for setting within it sends terahertz detection ripple, and incide on tube wall to be measured, can decay when the terahertz detection ripple passes through the tube wall to be measured, Terahertz reception device detects the change of terahertz detection ripple, and then can obtain the thickness of tube wall to be measured；The pipe thickness on-line computing model need not contact tube wall can be to realize that pipe thickness is fast and accurately detected.
Description
Technical field
The present invention relates to pipe thickness fields of measurement, more particularly to a kind of pipe thickness on-line computing model, system and side
Method.
Background technology
In daily production and living, the pipeline transportation such as various water pipes, oil pipe, appendix is very common, is national warp
Indispensable important component in Ji.Wherein, the thickness of tube wall is then the most important factor for determining pipeline quality, directly certainly
The load-bearing in fixed tube road, connectivity, reliability, and the factor such as attractive in appearance.
Most of traditional pipe wall thickness measuring apparatus are contacts, it is impossible to carry out on-line measurement.At present, the common pipe of in the market
Wall thickness measuring method generally uses ultrasonic measurement and X-ray measurement, although ultrasonic wave can find the profile and state of object,
But need contact object to be detected that this kind of detection means can also cause a certain degree of abrasion to tube wall.X-ray measurement is one
Non-contact type nondestructive thickness measuring technology is planted, but device is expensive, and complex operation, measurement range is small, and staff needs to be equipped with and prevents
The device of radiation, substantially increases the difficulty of cost and operation.
The content of the invention
Based on this, it is necessary to provide a kind of pipe thickness on-line computing model, system and method, can be with without contacting tube wall
Realize that pipe thickness is fast and accurately detected.
On the one hand, the present invention proposes a kind of pipe thickness on-line computing model, and the on-line computing model includes：
Terahertz generating means, for producing terahertz detection ripple and launching to tube wall to be measured；
Terahertz reception device, for receiving the terahertz detection ripple through the tube wall to be measured, with according to the terahertz
Hereby probing wave obtains the thickness of the tube wall to be measured through the decay occurred after the tube wall to be measured.
Above-mentioned pipe thickness on-line computing model, including Terahertz generating means and Terahertz reception device, Terahertz occur
Device is used to produce terahertz detection ripple and launches to tube wall to be measured, and Terahertz reception device is used to receive treats test tube through described in
The terahertz detection ripple of wall, with according to the terahertz detection ripple through after the tube wall to be measured occur decay obtain described in treat
The thickness of test tube wall；When being detected to pipe thickness, the Terahertz generating means for setting within it sends terahertz detection
Ripple, and incide on tube wall to be measured, can decay when the terahertz detection ripple passes through the tube wall to be measured, Terahertz receives dress
The change for detecting terahertz detection ripple is put, and then the thickness of tube wall to be measured can be obtained；The pipe thickness on-line computing model without
Tube wall need to be contacted can be to realize that pipe thickness is fast and accurately detected.
Wherein in one embodiment, the on-line computing model offers the cavity for being penetrated for tube wall to be measured.
Wherein in one embodiment, the thickness of the tube wall to be measured meets：
D=(Δ t × c)/n；
Wherein, Δ t be the terahertz detection ripple that receives of the Terahertz reception device by the tube wall to be measured when produce
The time delay of the raw corresponding absworption peak of decay, c is the light velocity, and n is the refractive index of the tube wall to be measured.
Wherein in one embodiment, the Terahertz generating means includes producing the laser of laser pulse, produces partially
The DC polarization device and photoconductive transmitting antenna of voltage are put, the photoconductive transmitting antenna is in the presence of the bias voltage
The laser pulse is converted into THz wave to launch.
Wherein in one embodiment, the Terahertz reception device is photoconductive exploring antenna.
Wherein in one embodiment, also including the first beam splitter and delayer, first beam splitter is by the laser
Pulse is divided into detection light and pump light, and the detection light is sent into the photoconductive transmitting antenna, by pump light warp
The Terahertz reception device is sent to after delayer treatment.
Wherein in one embodiment, also the first terahertz including being arranged on the transmission path of the terahertz detection ripple
Hereby lens and the second beam splitter, the first Terahertz lens are used to be focused treatment to the terahertz detection ripple, described
Second beam splitter is used to that parallel light output will to be converted to by the terahertz detection ripple after focusing.
Wherein in one embodiment, also including the second Terahertz lens, the transmitting of the terahertz detection ripple is arranged on
On path, connect for being focused treatment to the terahertz detection ripple through the tube wall to be measured, and being sent to the Terahertz
Receiving apparatus.
Wherein in one embodiment, also including phase locking unit, it is arranged on the RX path of the terahertz detection ripple, uses
Enter horizontal lock and enhanced processing in the terahertz detection ripple received to the Terahertz reception device, and by the terahertz after treatment
Hereby probing wave is sent to computing terminal.
On the other hand, the present invention proposes a kind of pipe thickness on-line monitoring system, including above-mentioned pipe thickness on-line monitoring
Instrument and tube wall extruder, the tube wall extruder are used to be molded pipeline and be delivered to the sky of the pipe thickness on-line computing model
In hole.
Another further aspect, the present invention proposes a kind of pipe thickness on-line monitoring method, including：
Launch terahertz detection ripple to tube wall to be measured；
Reception has passed through the terahertz detection ripple of the tube wall to be measured；
The thickness of the tube wall to be measured is obtained through the decay occurred after the tube wall to be measured according to the terahertz detection ripple
Degree.
Wherein in one embodiment, the thickness of the tube wall to be measured meets：
D=(Δ t × c)/n；
Wherein, Δ t be the terahertz detection ripple that receives of the Terahertz reception device by the tube wall to be measured when produce
The time delay of the raw corresponding absworption peak of decay, c is the light velocity, and n is the refractive index of the tube wall to be measured.
Brief description of the drawings
Fig. 1 is the structural representation of pipe thickness on-line computing model in an embodiment；
Fig. 2 is the oscillogram of the terahertz detection ripple that Terahertz reception device is received in an embodiment；
Fig. 3 is the structural representation of pipe thickness on-line monitoring system in an embodiment.
Specific embodiment
Referring to Fig. 1, Fig. 1 is the structure chart of pipe thickness on-line computing model in an embodiment.
In the present embodiment, the pipe thickness line monitor include specimen holder 10, offered on the specimen holder 10 for
For the cavity 101 that tube wall to be measured is penetrated, the cavity 101 is cylindricality through hole, is not limited to cylindricality.
Terahertz generating means is used to produce terahertz detection ripple and launch to tube wall to be measured 30.
Wherein in one embodiment, the Terahertz generating means includes producing the laser 11 of laser pulse, produces partially
The DC polarization device 12 and photoconductive transmitting antenna 13 of voltage are put, the photoconductive transmitting antenna 13 is in the bias voltage
The laser pulse is converted into THz wave under effect to launch.Further, the laser 11 is titanium-sapphire laser
Device.
Terahertz reception device is used to receive the terahertz detection ripple through the tube wall to be measured 30.
Photoconductive transmitting antenna 13 launches terahertz detection ripple, and impinges perpendicularly on tube wall to be measured 30, the Terahertz
Probing wave will be partially absorbed when through tube wall 30 to be measured by tube wall to be measured 30, and then be decayed, Terahertz reception device
Receive through the terahertz detection ripple after tube wall 30 to be measured, the terahertz detection ripple can be obtained and sent out when through tube wall 30 to be measured
Raw change, and then obtain pipe thickness.
Wherein in one embodiment, referring to Fig. 2, Fig. 2 is the terahertz that Terahertz reception device is received in an embodiment
The hereby oscillogram of probing wave.Wherein, abscissa represents the time, and ordinate represents energy percentage.
The thickness of tube wall to be measured 30 meets：
D=(Δ t × c)/n；
Wherein, Δ t be the terahertz detection ripple that receives of the Terahertz reception device by the tube wall 30 to be measured when
The time delay of the absworption peak of generation, c is the light velocity, and n is the refractive index of the tube wall to be measured 30.
Terahertz detection ripple will be partially absorbed by the subject generation decay when through tube wall 30 to be measured, and the decay corresponds to too
The absworption peak of the terahertz detection ripple that hertz reception device is received, the absworption peak lasting time delay is that THz wave is passed through
The time of the tube wall to be measured 30 experience, i.e. Δ t.C is the light velocity, and n is the refractive index of the tube wall to be measured 30, and c/n is Terahertz
Spread speed of ripple when through the tube wall 30 to be measured.
Thus, spread speed c/n and experience that the thickness of tube wall to be measured 30 passes through tube wall to be measured 30 for THz wave are obtained
The product of time Δ t, i.e. d=(Δ t × c)/n.The thickness of pipe wall of tube wall to be measured 30 can be fast and accurately obtained by this way
Degree.
Wherein in one embodiment, the Terahertz reception device is photoconductive exploring antenna 14.
Wherein in one embodiment, also including the first beam splitter 15 and delayer 16, first beam splitter 15 is by institute
State laser pulse and be divided into detection light and pump light, and the detection light is sent to the photoconductive transmitting antenna 13, will be described
Pump light is sent to the Terahertz reception device after being processed through the delayer 16.
A part for the laser pulse that laser 11 sends, that is, detecting light is used to produce terahertz detection ripple, another part,
I.e. pump light is used for pumping Terahertz reception device, i.e. terahertz of pumping photoconduction exploring antenna 14 reception through tube wall 30 to be measured
Hereby probing wave.
Wherein, the advanced line delay treatment before pump light reaches pumping photoconduction exploring antenna 14 so that the pump light with
Terahertz detection ripple through tube wall to be measured 30 reaches photoconductive exploring antenna 14 simultaneously, ensures the photoconductive exploring antenna 14 pairs
Effective reception of signal, it is not necessary to extra pump arrangement, simplifies the structure of the pipe thickness on-line computing model 100, saves
Cost.
Wherein in one embodiment, also including the first Terahertz lens 17, the hair of the terahertz detection ripple is arranged on
On rays footpath, for being focused treatment to the terahertz detection ripple.
Wherein in one embodiment, also including the second beam splitter 18, the transmitting road of the terahertz detection ripple is arranged on
On footpath, for parallel light output will to be converted to by the terahertz detection ripple after focusing.
Photoconductive transmitting antenna 13 launches terahertz detection ripple, and scattered terahertz detection ripple is saturating by the first Terahertz
Mirror 17 is focused treatment, reduces the loss of terahertz detection ripple, then parallel by being converted to after the treatment of the second beam splitter 18
Light output, impinges perpendicularly on tube wall to be measured 30, treats test tube wall 30 and is detected.
Wherein in one embodiment, also including the second Terahertz lens 19, the hair of the terahertz detection ripple is arranged on
On rays footpath, for being focused treatment to the terahertz detection ripple through the tube wall to be measured 30, and the terahertz is sent to
Hereby reception device.
Terahertz detection ripple is focused after processing through being dispersed light after tube wall to be measured 30 by the second Terahertz lens 19
Terahertz reception device is sent to, i.e., photoconductive exploring antenna 14 is received, the Terahertz reduced through tube wall 30 to be measured is visited
Loss of the ripple in communication process is surveyed, the signal intensity that the photoconductive exploring antenna 14 of enhancing is received strengthens Detection results.
Wherein in one embodiment, also including phase locking unit 20, it is arranged on the RX path of the terahertz detection ripple,
For entering horizontal lock and enhanced processing to the terahertz detection ripple that the Terahertz reception device is received, and by after treatment too
Hertz probing wave is sent to computing terminal 40.
Photoconductive exploring antenna 14 is received after the terahertz detection ripple through tube wall 30 to be measured, sends it to lock phase
Device 20 enters horizontal lock and enhanced processing, realizes the stabilization collection of signal, is then sent to computing terminal 40, and such as computer enters line number
According to analysis and calculating, relevant parameter is extracted, and then obtain the thickness of tube wall to be measured 30.
The refractive index n being stored with the computing terminal 40 corresponding to the tube wall to be measured 30 of unlike material, is carrying out tube wall
In the calculating process of thickness, the characteristic according to tube wall to be measured 30 is transferred automatically, realizes on-line monitoring.
Above-mentioned pipe thickness on-line computing model 100, when being detected to pipe thickness, tube wall to be measured 30 passes through the tube wall
Thickness on-line computing model 100, the photoconductive transmitting antenna 13 for setting within it sends terahertz detection ripple, and incides pipe to be measured
On wall 30, can decay when the terahertz detection ripple passes through the tube wall 30 to be measured, produce absworption peak, photoconductive exploring antenna
14 duration for detecting the absworption peak, obtain terahertz detection ripple test tube is treated by this with reference to the refractive index of tube wall to be measured 30
Spread speed during wall 30, and then obtain the thickness of tube wall to be measured 30.The laser pulse that laser 11 sends is split place
Reason rear portion is used to produce terahertz detection ripple, part pumping photoconduction exploring antenna 14 after delay process to receive and pass through
The terahertz detection ripple of tube wall to be measured 30, without extra pump arrangement, simplifies the knot of the pipe thickness on-line computing model 100
Structure, has saved cost.Meanwhile, the terahertz detection ripple that photoconductive transmitting antenna 13 sends before tube wall 30 to be measured is reached, and
Photoconductive exploring antenna 14 carried out corresponding beam treatment before the terahertz detection ripple for having passed through tube wall to be measured 30 is received,
Loss of the terahertz detection ripple in communication process is reduced, Detection results and precision is enhanced.The pipe thickness is monitored on-line
Instrument 100 need not contact tube wall can be to realize that pipe thickness is fast and accurately detected.
Referring to Fig. 3, Fig. 3 is the structural representation of pipe thickness on-line monitoring system in an embodiment.
In the present embodiment, the pipe thickness on-line monitoring system includes above-mentioned pipe thickness on-line computing model 100 and pipe
Wall extruder 200, in the tube wall to pipe under test, i.e., when tube wall 30 to be measured carries out Thickness sensitivity, tube wall extruder 200 is by pipeline
The cylindricality through hole of the pipe thickness on-line computing model 100 is molded and is delivered to, tube wall to be measured 30 can exist through the pipe thickness
Line monitor 100.During being detected to pipe thickness, without contacting tube wall, it is to avoid abrasion to tube wall.
A kind of pipe thickness on-line monitoring method, wherein in one embodiment, comprises the following steps：
Step one, to tube wall to be measured launch terahertz detection ripple.The frequency of THz wave is very high, and pulse width is very
Short, so its spatial resolution and temporal resolution are all very high, and photon energy only has 4 milli electron-volts, safe, can
To realize lossless, non-contact detecting.
Step 2, reception have passed through the terahertz detection ripple of the tube wall to be measured.
Step 3, according to the terahertz detection ripple through after the tube wall to be measured occur decay obtain described in treat test tube
The thickness of wall.
Wherein in one embodiment, the thickness of the tube wall to be measured obtained using the pipe thickness on-line monitoring method is expired
Foot：
D=(Δ t × c)/n；
Wherein, Δ t be the terahertz detection ripple that receives of the Terahertz reception device by the tube wall to be measured when produce
The time delay of the raw corresponding absworption peak of decay, c is the light velocity, and n is the refractive index of the tube wall to be measured.
Above-mentioned pipe thickness on-line monitoring method, can be to realize pipe thickness safely, fast and accurately without contacting tube wall
Detection.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (12)
1. a kind of pipe thickness on-line computing model, it is characterised in that the on-line computing model includes：
Terahertz generating means, for producing terahertz detection ripple and launching to tube wall to be measured；
Terahertz reception device, for receiving the terahertz detection ripple through the tube wall to be measured, visits with according to the Terahertz
Survey the thickness that ripple obtains the tube wall to be measured through the decay occurred after the tube wall to be measured.
2. pipe thickness on-line computing model according to claim 1, it is characterised in that offer for treating test tube for described in
The cavity that wall is penetrated.
3. pipe thickness on-line computing model according to claim 1, it is characterised in that the thickness of the tube wall to be measured is expired
Foot：
D=(Δ t × c)/n；
Wherein, Δ t be the terahertz detection ripple that receives of the Terahertz reception device by the tube wall to be measured when produce
Decay time delay of corresponding absworption peak, c is the light velocity, and n is the refractive index of the tube wall to be measured.
4. pipe thickness on-line computing model according to claim 1, it is characterised in that the Terahertz generating means includes
The laser for producing laser pulse, the DC polarization device and photoconductive transmitting antenna that produce bias voltage, the photoconduction hair
Penetrate antenna the laser pulse is converted into THz wave in the presence of the bias voltage and launch.
5. pipe thickness on-line computing model according to claim 1, it is characterised in that the Terahertz reception device is light
Conductance exploring antenna.
6. pipe thickness on-line computing model according to claim 4, it is characterised in that also including the first beam splitter and time delay
The laser pulse is divided into detection light and pump light by device, first beam splitter, and the detection light is sent into the light
Conductance transmitting antenna, the Terahertz reception device is sent to after the pump light is processed through delayer.
7. pipe thickness on-line computing model according to claim 1, it is characterised in that also including being arranged on the Terahertz
The first Terahertz lens and the second beam splitter on the transmission path of probing wave, the first Terahertz lens be used for it is described too
Hertz probing wave is focused treatment, and second beam splitter is used to be converted to by the terahertz detection ripple after focusing
Parallel light output.
8. pipe thickness on-line computing model according to claim 1, it is characterised in that also including the second Terahertz lens,
It is arranged on the transmission path of the terahertz detection ripple, for gathering to the terahertz detection ripple through the tube wall to be measured
Jiao's treatment, and it is sent to the Terahertz reception device.
9. pipe thickness on-line computing model according to claim 1, it is characterised in that also including phase locking unit, be arranged on institute
State on the RX path of terahertz detection ripple, for being locked to the terahertz detection ripple that the Terahertz reception device is received
Phase and enhanced processing, and the terahertz detection ripple after treatment is sent to computing terminal.
10. a kind of pipe thickness on-line monitoring system, it is characterised in that supervised online including the pipe thickness described in claim 2
Instrument and tube wall extruder are surveyed, the tube wall extruder is used to be molded pipeline and be delivered to the pipe thickness on-line computing model
In cavity.
A kind of 11. pipe thickness on-line monitoring methods, it is characterised in that including：
Launch terahertz detection ripple to tube wall to be measured；
Reception has passed through the terahertz detection ripple of the tube wall to be measured；
The thickness of the tube wall to be measured is obtained through the decay occurred after the tube wall to be measured according to the terahertz detection ripple.
12. pipe thickness on-line monitoring methods according to claim 11, it is characterised in that the thickness of the tube wall to be measured
Meet：
D=(Δ t × c)/n；
Wherein, Δ t be the terahertz detection ripple that receives of the Terahertz reception device by the tube wall to be measured when produce
Decay time delay of corresponding absworption peak, c is the light velocity, and n is the refractive index of the tube wall to be measured.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710114658.9A CN106767462A (en) | 2017-02-28 | 2017-02-28 | Pipe thickness on-line computing model, system and method |
| PCT/CN2018/076246 WO2018157731A1 (en) | 2017-02-28 | 2018-02-11 | Online tube wall thickness monitoring instrument, system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710114658.9A CN106767462A (en) | 2017-02-28 | 2017-02-28 | Pipe thickness on-line computing model, system and method |
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|---|---|
| CN106767462A true CN106767462A (en) | 2017-05-31 |
Family
ID=58960751
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710114658.9A Pending CN106767462A (en) | 2017-02-28 | 2017-02-28 | Pipe thickness on-line computing model, system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106767462A (en) |
| WO (1) | WO2018157731A1 (en) |
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| WO2018157731A1 (en) * | 2017-02-28 | 2018-09-07 | 华讯方舟科技有限公司 | Online tube wall thickness monitoring instrument, system and method |
| CN113514418A (en) * | 2020-04-10 | 2021-10-19 | 华太极光光电技术有限公司 | Transmission-reflection dual-purpose terahertz probe and detection method thereof |
| CN114126830A (en) * | 2019-07-18 | 2022-03-01 | 斯考拉股份公司 | Method and device for measuring tubular strands |
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| WO2018157731A1 (en) | 2018-09-07 |
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