CN114184546A - Laser probe quartz content rapid analysis device, TBM and method - Google Patents
Laser probe quartz content rapid analysis device, TBM and method Download PDFInfo
- Publication number
- CN114184546A CN114184546A CN202111371632.5A CN202111371632A CN114184546A CN 114184546 A CN114184546 A CN 114184546A CN 202111371632 A CN202111371632 A CN 202111371632A CN 114184546 A CN114184546 A CN 114184546A
- Authority
- CN
- China
- Prior art keywords
- laser
- rock
- quartz content
- rapid analysis
- spectrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000010453 quartz Substances 0.000 title claims abstract description 40
- 238000004458 analytical method Methods 0.000 title claims abstract description 32
- 239000000523 sample Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000003595 spectral effect Effects 0.000 claims abstract description 35
- 238000001228 spectrum Methods 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 238000007667 floating Methods 0.000 claims abstract description 8
- 230000002708 enhancing effect Effects 0.000 claims abstract description 6
- 210000002381 plasma Anatomy 0.000 claims description 20
- 239000013307 optical fiber Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000012847 principal component analysis method Methods 0.000 claims description 5
- 238000000611 regression analysis Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000008016 vaporization Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 14
- 230000005641 tunneling Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 21
- 238000010586 diagram Methods 0.000 description 11
- 238000004590 computer program Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011034 rock crystal Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000002536 laser-induced breakdown spectroscopy Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001637 plasma atomic emission spectroscopy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004846 x-ray emission Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
Abstract
The invention provides a laser probe quartz content rapid analysis device, a TBM (tunnel boring machine) and a method, wherein the laser probe quartz content rapid analysis device comprises a laser transmitting and receiving device and a laser enhancing device, wherein the laser transmitting and receiving device comprises a laser transmitter, an optical component for controlling laser irradiation area and energy, a light collector, a spectrum detection device, a micro time schedule controller and a processor; the laser reinforcing device comprises a blowing mechanism, a power control generator and a telescopic positive electrode and a telescopic negative electrode. After the blowing mechanism removes floating dust around the object to be measured, the laser emitter irradiates the rock mass to form plasma, and then the power supply control generator is started to generate a high-voltage electric field to secondarily excite the plasma, so that the effect of enhancing the spectral intensity is obtained; the working time sequence of each mechanism is controlled by a micro time sequence controller according to detection logic; the processor is used for analyzing the spectral information to obtain the quartz content of the rock; the method can realize rapid measurement of the quartz content of the rock, ensure the TBM tunneling efficiency and effectively control the construction cost.
Description
Technical Field
The invention belongs to the technical field of tunnel boring machine construction, and particularly relates to a laser probe quartz content rapid analysis device, a TBM (tunnel boring machine) and a method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The TBM (full-face rock tunnel boring machine) is high-end heavy type boring equipment integrating the functions of boring, deslagging, transportation and supporting, is widely applied with the advantages of safety and high efficiency, and is one of the main equipment for water conservancy and hydropower, transportation tunnels and mine roadway construction. With the gradual shift of tunnel and underground engineering construction in China to the west, the complex stratum condition of large burial depth brings important challenges to the tunnel safety construction. However, in actual engineering, the TBM has poor adaptability to complex geology, if construction encounters a high-strength and high-abrasiveness rock stratum, the phenomenon of 'stone grinding cutter' is prominent, abnormal damage such as eccentric grinding and breakage of cutter rings and the problem of bearing failure are aggravated, the inspection, replacement and maintenance of the hob take about 1/3 of the total tunneling construction time, the tunneling efficiency is seriously affected, and the construction cost is increased. The quartz content in the rock is one of important factors related to hob abrasion, and if the quartz content of the surrounding rock can be rapidly and effectively obtained in the TBM tunneling process, the cutter abrasion condition can be judged beneficially, the TBM tunneling parameters can be adjusted in time to adapt to the surrounding rock state changing continuously in front, and the method has important significance for improving the tunneling efficiency and reducing the construction cost.
However, the inventors found that the following disadvantages are particularly observed for the current in-situ test of the quartz content in TBM tunneling:
(1) the carrying type rock quartz content measuring device is mainly used for detecting the rock quartz content of the side wall of the tunnel, is inflexible in position and has a certain distance with the tunnel face, and cannot represent the characteristics of the rock of the tunnel face;
(2) the existing detection technologies such as plasma emission spectroscopy, X-ray fluorescence spectroscopy, atomic absorption spectroscopy, X-ray photoelectron spectroscopy and the like have complex instruments, require sample preparation, are not suitable for being used in a TBM tunnel complex environment, and have slow analysis speed and poor real-time performance;
(3) the method for acquiring a certain number of rock samples to obtain the hardness, the wear resistance index and the quartz content and carrying out nonlinear analysis on the data to establish the quartz content prediction model depends on the quality of original data of a data set, and is difficult to cover numerous influencing factors.
The Laser Induced Breakdown Spectroscopy (LIBS), also known as a laser probe, is an element analysis technology widely applied and applied in science and engineering, has a wide object-oriented range, and has the advantages of no need of sample pretreatment, strong real-time performance, wide measurement distance and the like. However, the TBM construction tunnel has poor environment, much dust and high humidity, so if the detection method is used for analyzing the content of elements and quartz, laser probe equipment with high integration level and small volume is needed, the interference of the environment on the detection is solved, and a matched data processing method is formed.
Disclosure of Invention
The invention aims to solve the problems and provides a laser probe quartz content rapid analysis device, a TBM and a method.
According to some embodiments, the invention adopts the following technical scheme:
a laser probe quartz content rapid analysis device comprises a laser transmitting and receiving device and a laser signal enhancement device, wherein the laser signal enhancement device is arranged between a rock body or rock slag to be detected and the laser transmitting and receiving device;
the laser transmitting and receiving device comprises a laser transmitting mechanism, a spectrum receiving mechanism, a processor and a controller, wherein:
the laser emission mechanism comprises a laser emitter for generating laser and an optical component for controlling the laser irradiation area and the irradiation energy emitted by the laser emitter;
the spectrum receiving mechanism comprises a light collector and a detection device, wherein the light collector is used for collecting light signals fed back by rocks, and the detection device is used for converting the light signals obtained by the light collector into spectrum information;
the controller is used for controlling the working time sequence of the laser emission mechanism and the spectrum receiving mechanism and controlling the start and the end of the laser enhancement device;
the processor is used for analyzing the spectral information to obtain the quartz content of the rock;
the laser reinforcing device comprises a blowing mechanism, a power supply control generator, an electrode anode and an electrode cathode, wherein:
the blowing mechanism is used for cleaning floating dust particles in the surrounding environment of the object to be detected and reducing interference on laser signals;
the power control generator is connected with the anode and the cathode of the electrode to form a high-voltage electric field for enhancing the induction and triggering of the laser.
In an alternative embodiment, the optical assembly includes a collimating lens and a focusing lens, the collimating lens is disposed between the focusing lens and the laser emitter, and the collimating lens, the focusing lens and the laser emitter are in a light path.
By way of further limitation, the collimating lens is used for diverging a laser point light source emitted from the laser emitter into a parallel light path, the focusing lens is used for refocusing and converging the parallel light path into a light spot, the size of the irradiation light spot is changed by changing the focal distance from the focusing lens, and then the laser irradiation area and the irradiation energy are controlled.
In an alternative embodiment, the laser emitter is a high-energy pulse laser, a picosecond laser, a femtosecond laser or a fiber laser, and is used for emitting a laser beam to the surface of the rock to be detected to vaporize the surface of the rock to form plasma.
As an alternative embodiment, the detection device includes an optical fiber, a spectrometer and a detector, the optical fiber connects the light collector and the spectrometer, the spectrometer is used for forming spectral information with characteristic spectral lines after light splitting of the optical signal by the grating, and the detector is used for converting the spectral information into photoelectric signals.
By way of further limitation, the detector is a photomultiplier tube or a charge coupled device.
As an optional implementation manner, the laser transmitting and receiving device further includes a distance measuring module, which is used for measuring the distance between the surface of the rock to be detected and the focal point of the laser beam emitted by the focusing lens, and changing the focal point distance of the focusing lens according to the distance, thereby changing the size of the laser spot and the energy on the rock to be detected.
As an alternative embodiment, the laser emitting and receiving device further comprises a housing, the housing accommodates the laser emitting mechanism, the spectrum receiving mechanism and the controller, and the housing is provided with a laser emitting port, a light collector receiving port and a plurality of interfaces.
By way of further limitation, the laser emitting port and the laser emitter are located on the same straight line, the light collector receiving port and the light collector are located on the same straight line, and the laser emitting port and the light collector receiving port are located on the same side of the housing.
As a further limitation, the shell parts near the laser emitting port and the light collector receiving port are made of high-temperature resistant materials, and the shell is provided with an anti-corrosion waterproof coating.
In alternative embodiments, the processor is connected to the detection device wirelessly or by wire.
As an alternative embodiment, the power supply control generator controls rapid charging and discharging of the high-voltage electric field, and plasma vaporized by laser carries out secondary ionization and excitation under the induction and triggering of the high-voltage electric field, so that the spectral intensity is enhanced.
In an alternative embodiment, the positive and negative electrodes are made of easily ionizable aluminum alloy or nickel-chromium alloy, and more ions can be ionized to excite stronger spectral intensity.
As a further limitation, the electrode anode and the electrode cathode are both arranged into telescopic electrode plates, and extend out when the detection device is used, and retract after detection is finished, so that the electrode protection is facilitated.
As an alternative embodiment, the laser reinforcing device is placed between the rock body or rock slag to be measured and the laser transmitting and receiving device, so as to obtain a better effect of reinforcing the spectral intensity.
As an alternative embodiment, the controller in the laser transmitting and receiving device adopts a programmable logic controller PLC to carry out logic control, and the control sequence is recompiled according to the step of detecting the quartz content by the device.
By way of further limitation, the controller is configured to firstly control the blowing mechanism to clean floating dust particles around the object to be measured, secondly control the laser emitting mechanism to emit laser beams, secondly control the power supply control generator to form a high-voltage electric field, and finally control the spectrum receiving mechanism to work.
As an alternative embodiment, the processor is configured to extract characteristic spectral line information of each element in the spectrum and calibrate the characteristic spectral line information by using a principal component analysis method, perform multiple regression analysis on the obtained data by using a partial least squares method, establish a prediction model, and obtain the content of each oxide through calculation and analysis of the prediction model, thereby obtaining the content of quartz in the detected rock mass.
A TBM is provided with the device on a belt conveyor of the TBM.
The working method based on the device comprises the following steps:
starting a blowing mechanism in the laser reinforcing device to blow away floating dust and particles in the TBM tunnel;
a laser emitting mechanism in the laser emitting and receiving device emits laser beams to enable the detection rock mass to generate vaporized plasmas;
a power supply control generator in the laser reinforcing device forms a high-voltage electric field between the anode and the cathode of the electrode to excite the plasma again;
a spectrum receiving mechanism in the laser transmitting and receiving device collects the plasma and converts the plasma into a spectrum signal;
extracting characteristic spectral line information of each element in the spectrum and calibrating by using a principal component analysis method according to the acquired spectral signals, performing multiple regression analysis on the obtained data by using a partial least square method, establishing a prediction model, and calculating and analyzing by using the prediction model to obtain the content of each oxide so as to obtain the content of the quartz in the detected rock mass.
Compared with the prior art, the invention has the beneficial effects that:
the rapid analysis device is integrated, can move flexibly, is simple and convenient to operate, is suitable for complex working environments of TBM tunnel construction, can detect rock quartz content of TBM broken rock debris sheets, tunnel rock walls and accessible tunnel face rock walls, obtains characteristic parameters of rock masses at different positions, and is wide in application range.
The invention is suitable for TBM tunnel environment, improves the link of spectrum signal acquisition in laser probe equipment, is provided with a laser enhancement device to improve spectrum signals, and readjusts the control logic of a controller, thereby ensuring the accuracy of detecting elements and calculating quartz content.
The method has the advantages of no need of independently preparing samples, high analysis speed, automatic control of data transmission and processing, capability of feeding back the obtained information to technicians in time, data guarantee for regulation and control of TBM control parameters, contribution to mastering of stratum condition conditions, timely replacement or maintenance of TBM hobs, reduction of abnormal abrasion accidents of the hobs, contribution to improvement of TBM construction efficiency and construction cost saving.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a laser transmitter-receiver according to at least one embodiment of the present invention;
FIG. 2 is a schematic diagram of a laser irradiation excited plasma and receiving and laser enhancement apparatus according to at least one embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an overall apparatus provided in accordance with at least one embodiment of the present invention;
fig. 4 is a schematic analysis flow chart according to at least one embodiment of the present invention.
Wherein, 1, a focusing lens; 2. a collimating mirror; 3. a laser transmitter; 4. a light collector; 5. an optical fiber; 6. a spectrometer; 7. a detector; 8. a micro time schedule controller; 9. a telescopic caliper; 10. a housing; 11. a portable handle; 12. a line; 13. a power supply external interface; 14. a USB interface for transmitting data; 15. a light collector receiving port; 16. a laser emitting port; 17. a laser beam; 18. a rock mass to be measured; 19. plasma formed after laser irradiation; 20. a telescopic electrode positive electrode; 21. a telescopic electrode cathode; 22. a blowing mechanism; 23. a power control generator; 24. a cable; 25. a laser emitting and receiving device; 26. a laser enhancement device.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
In an exemplary embodiment of the present invention, as shown in fig. 1 to 3, a laser probe quartz content rapid analysis device for a TBM tunnel includes a laser emission receiving device 25 and a laser enhancement device 26, in this embodiment, the laser emission receiving device and the laser enhancement device are connected by a cable to work together as a whole. But in other embodiments the two may not be connected.
The main mechanism in the laser transmitting and receiving device 25 comprises a focusing lens 1, a collimating mirror 2, a laser transmitter 3, a light collector 4, an optical fiber 5, a spectrometer 6, a detector 7 and a micro time schedule controller 8; the main mechanisms in the laser enhancement device 26 include a retractable electrode anode 20, a retractable electrode cathode 21, a blowing mechanism 22, and a power control generator 23.
The blowing mechanism 22 operates before the laser emitter 3 and is used for removing dust particles existing in the environment around the rock body or rock slag to be measured, so that the energy of the laser is reduced and the loss in the air is reduced.
The laser emitter 3 is used for emitting laser beams to the surface of the measured rock, and the power density of the laser irradiated on the surface of the rock by the high-energy laser can reach 107W/cm2In the above, the irradiated rock area is vaporized to form the plasma 19.
In the present embodiment, the laser emitter 3 used in the apparatus includes, but is not limited to, a high-energy pulse laser, a picosecond laser, a femtosecond laser, a fiber laser, and the like.
The collimating mirror 2 is used for diverging a laser point light source emitted from the laser emitter into a parallel light path, and increasing the effective power of the laser for irradiating the object. The focusing lens 1 refocuses and converges the parallel laser beams passing through the collimating lens 2 into light spots, and changes the size of the irradiated light spots by changing the focal distance from the focusing lens when detecting an object, thereby controlling the laser irradiation area and the irradiation energy.
Laser emitted from the laser emitter 3 is diverged into a parallel light path through the collimating lens 2, the effective power of the laser irradiation object is increased, then the parallel light path is converged into a point light source again through the focusing lens 1, the point light source forms a light spot on a rock body to be measured, the size of the light spot is changed by changing the focal distance between the rock body to be measured and the focusing lens 1, and the laser irradiation area and the energy size are further controlled.
After the laser beam 17 is irradiated for multiple times, a laser melting pit is formed on the surface of the rock mass 18 to be measured, and plasma 19 is formed in the gasified rock mass area. The control logic in the micro timing controller 8 is rewritten and compiled, a programmable logic controller PLC is adopted for logic control, then the laser emission is carried out, the power supply is firstly controlled to control the generator 23 to charge and discharge, a high-voltage electric field is generated between the telescopic electrode anode 20 and the telescopic electrode cathode 21, the plasma 19 is excited by the electric ions for the second time, so that the spectral intensity is enhanced, and then the light collector 4 is controlled to collect, as shown in figure 2. Then the optical signal is transmitted to the spectrometer 6 by the optical fiber 5, the spectrometer 6 forms a spectrum after the received optical signal is split by the grating, different atoms absorb different wavelengths, each element has a unique characteristic spectrum, and the content of each element can be obtained by calculating and measuring the spectrum.
The spectral information is converted from optical signals to electrical signals by the detector 7 in the device, so that the spectral information can be smoothly transmitted to a computer through a line 12 and a data USB interface 14 for subsequent analysis and processing. The types of detectors 7 used in the apparatus include, but are not limited to, photomultiplier tubes, charge coupled devices, and various types of extended charge coupled devices.
The micro time sequence controller 8 is used for coordinating and controlling the working sequence and the working time of each part of elements in the whole process from laser emission to data acquisition, and the time sequence is adjusted by sending pulse signals with different time intervals to different elements, and the time intervals can be set randomly.
In this embodiment, the micro timing controller 8 may simultaneously generate multiple pulse signals to be respectively transmitted to the blowing mechanism 22, the laser emitter 3, the power control generator 23, the light collector 4, and the spectrometer 6, and after the blowing mechanism is controlled to be started to complete the cleaning operation, the laser is emitted to irradiate the object to be measured, the power is started to form a high voltage electric field, and then the receiving end is called to receive and process the secondarily excited plasma. The delay time between the two paths of pulse signals is adjustable, and the adjustment range is +/-550 mu s.
The device is also provided with a shell 10 to protect other components, the shell 10 is made of a composite material with high hardness, and a portable handle 11 is arranged above the shell for convenient carrying and moving; the outer surface of the shell 10 is provided with an anticorrosive waterproof coating so as to ensure that the equipment can normally operate in a complicated damp and dusty environment of the TBM operation tunnel.
The housing 10 is also provided with a portable handle 11.
In addition, the device housing 10 is made of a high temperature resistant alloy material at the laser emitting opening 16 and the light collector receiving opening 15 for protecting the device from the high temperature of the laser beam. Wherein the diameter of the laser emitting opening 16 is set to be 4-6mm, and the diameter of the light collector receiving opening 15 is set to be 5-8 mm.
If the laser energy needs to be changed during detection, the telescopic caliper 9 can be used for measuring the distance between the object to be detected and the focus of the laser beam emitted by the focusing lens, so that the size of the light spot and the energy on the object to be detected can be changed. Generally, the focus is adjusted to be about 3mm away from the laser emitting opening, so that proper defocusing amount between the laser focus and the rock surface can be ensured, and when the defocusing amount needs to be changed, the moving distance can be accurately controlled through scales on the telescopic caliper 9.
Of course, in other embodiments, other ranging modules may be used.
The positive electrode 20 and the negative electrode 21 of the telescopic electrode can be made of easily ionized aluminum alloy or nickel-chromium alloy, and more ions can be ionized to excite stronger spectral intensity. After data acquisition is completed, the two motors can be retracted into the housing device where the power control generator 23 is located, thereby protecting the electrodes themselves. The acquired data is transmitted to a working computer through a data transmission USB interface 14 on the equipment, a final result can be quickly obtained after calculation through a quartz content analysis model, and the result is transmitted back to a TBM main control room so that technicians can analyze surrounding rock information in time through the data and judge the TBM tunneling state.
A method for rapidly analyzing the quartz content of a laser probe used for a TBM tunnel, as shown in FIG. 3, comprises the following steps:
firstly, a suitable detection site is selected. Firstly, in the TBM construction process, a technician can place the equipment beside a TBM belt conveyor or beside a tunnel side wall in a non-stop state to irradiate broken rock slag sheets and tunnel wall rock masses on the belt conveyor; secondly, in the fixed downtime of TBM, the laser irradiation can be carried out on the tunnel face rock mass to acquire data.
Secondly, the rock mass is detected. After the blowing mechanism clears up the floating dust granule around the rock mass or the rock sediment that awaits measuring, laser emitter transmission laser arouses out the plasma on the determinand, and power control generator excites the plasma secondary afterwards, strengthens spectral signal's intensity, and spectral signal is gathered by the light collector afterwards, and the spectral signal who will gather again passes through photoelectric conversion, analysis and transmission through original paper such as optic fibre, spectrum appearance, detector, miniature time schedule controller, obtains the element spectral data that can export.
And finally, processing the data. And the spectral data transmits the acquired spectral data to a working computer through a data transmission interface or a wireless network terminal on the equipment. In the analysis stage, main influence factors are determined by using a principal component analysis method, and characteristic spectral line information of each element in the spectrum is extracted and calibrated.
In this embodiment, the spectral data matrix obtained by the experiment is set as X, the specific element or mineral content obtained by using a mineral dissociation analyzer (MLA) and a saturation magnetization analyzer is set as Y, and then a multiple regression analysis is performed on the obtained data by using a partial least squares method to establish a prediction model, so as to obtain a linear mapping relationship between X and Y as follows: y ═ XB + F, where B is the computational matrix and F is the remainder. After the calculation model is established, the corresponding oxide content can be calculated through a spectrum matrix obtained by a spectrometer, and the oxide silicon dioxide is used for representing the quartz content, so that the quartz content and the proportion in the rock mass to be measured can be obtained.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (14)
1. A laser probe quartz content rapid analysis device is characterized in that: the device comprises a laser transmitting and receiving device and a laser signal enhancing device, wherein the laser enhancing device is arranged between a rock body or rock slag to be detected and the laser transmitting and receiving device;
the laser transmitting and receiving device comprises a laser transmitting mechanism, a spectrum receiving mechanism, a processor and a controller, wherein:
the laser emission mechanism comprises a laser emitter for generating laser and an optical component for controlling the laser irradiation area and the irradiation energy emitted by the laser emitter;
the spectrum receiving mechanism comprises a light collector and a detection device, wherein the light collector is used for collecting light signals fed back by rocks, and the detection device is used for converting the light signals obtained by the light collector into spectrum information;
the controller is used for controlling the working time sequence of the laser emission mechanism and the spectrum receiving mechanism and controlling the start and the end of the laser enhancement device;
the processor is used for analyzing the spectral information to obtain the quartz content of the rock;
the laser reinforcing device comprises a blowing mechanism, a power supply control generator, an electrode anode and an electrode cathode, wherein:
the blowing mechanism is used for cleaning floating dust particles in the surrounding environment of the object to be detected and reducing interference on laser signals;
the power control generator is connected with the anode and the cathode of the electrode to form a high-voltage electric field for enhancing the induction and triggering of the laser.
2. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the optical assembly comprises a collimating lens and a focusing lens, the collimating lens is arranged between the focusing lens and the laser emitter, and the collimating lens, the focusing lens and the laser emitter are arranged on a light path.
3. The rapid analysis device for quartz content of laser probe as claimed in claim 2, wherein: the collimating lens is used for diverging a laser point light source emitted from the laser emitter into a parallel light path, the focusing lens is used for refocusing and converging the parallel light path into a light spot, the size of the irradiation light spot is changed by changing the focal distance from the focusing lens, and the laser irradiation area and the irradiation energy are further controlled.
4. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the laser emitter is a high-energy pulse laser, a picosecond laser, a femtosecond laser or a fiber laser and is used for emitting laser beams to the surface of the rock to be detected and vaporizing the surface of the rock to form plasma.
5. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the detection device comprises an optical fiber, a spectrometer and a detector, wherein the optical fiber is connected with the light collector and the spectrometer, the spectrometer is used for forming spectral information with characteristic spectral lines after light signals are split by the grating, and the detector is used for converting the spectral information into photoelectric signals;
or further, the detector is a photomultiplier tube or a charge coupled device.
6. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the laser transmitting and receiving device also comprises a distance measuring module which is used for measuring the distance between the surface of the rock to be detected and the focal point of the laser beam emitted by the focusing lens, and changing the focal point distance of the focusing lens according to the distance so as to change the size of the laser spot and the energy on the rock to be detected;
or, the laser emission receiving device still includes the shell, laser emission mechanism, spectrum receiving mechanism and controller are accommodated in the shell, and are provided with laser emission mouth, light collector receiving port and a plurality of interface on the shell.
7. The rapid analysis device for quartz content of laser probe as claimed in claim 6, wherein: the laser emitting port and the laser emitter are positioned on the same straight line, the light collector receiving port and the light collector are positioned on the same straight line, and the laser emitting port and the light collector receiving port are positioned on the same side of the shell;
or the shell parts near the laser emitting port and the light collector receiving port are made of high-temperature-resistant materials, and an anti-corrosion waterproof coating is arranged on the shell.
8. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the power control generator controls the rapid charging and discharging of the high-voltage electric field, and the plasma vaporized by the laser is subjected to secondary ionization and excitation under the induction and triggering of the high-voltage electric field, so that the spectral intensity is enhanced.
9. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the positive and negative electrodes of the electrode are made of easily ionized aluminum alloy or nickel-chromium alloy, and more ions can be ionized to excite stronger spectral intensity.
10. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the electrode anode and the electrode cathode are both arranged into telescopic electrode plates, extend out when the detection device is used, and retract after detection is completed.
11. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the controller is configured to firstly control the blowing mechanism to clean floating dust particles around an object to be detected, secondly control the laser emitting mechanism to emit laser beams, secondly control the power supply control generator to form a high-voltage electric field, and finally control the spectrum receiving mechanism to work.
12. The rapid analysis device for quartz content of laser probe as claimed in claim 1, wherein: the processor is configured to extract characteristic spectral line information of each element in the spectrum by using a principal component analysis method and calibrate the characteristic spectral line information, perform multiple regression analysis on the obtained data by using a partial least square method, establish a prediction model, and obtain the content of each oxide through calculation and analysis of the prediction model so as to obtain the content of the quartz in the detected rock mass.
13. A TBM is characterized in that: the belt conveyor of the TBM is provided with the device of any one of claims 1-12.
14. Method of operating a device according to any of claims 1-12, characterized in that: the method comprises the following steps:
starting a blowing mechanism in the laser reinforcing device to blow away floating dust and particles in the TBM tunnel;
a laser emitting mechanism in the laser emitting and receiving device emits laser beams to enable the detection rock mass to generate vaporized plasmas;
a power supply control generator in the laser reinforcing device forms a high-voltage electric field between the anode and the cathode of the electrode to excite the plasma again;
a spectrum receiving mechanism in the laser transmitting and receiving device collects the plasma and converts the plasma into a spectrum signal;
extracting characteristic spectral line information of each element in the spectrum and calibrating by using a principal component analysis method according to the acquired spectral signals, performing multiple regression analysis on the obtained data by using a partial least square method, establishing a prediction model, and calculating and analyzing by using the prediction model to obtain the content of each oxide so as to obtain the content of the quartz in the detected rock mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111371632.5A CN114184546A (en) | 2021-11-18 | 2021-11-18 | Laser probe quartz content rapid analysis device, TBM and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111371632.5A CN114184546A (en) | 2021-11-18 | 2021-11-18 | Laser probe quartz content rapid analysis device, TBM and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114184546A true CN114184546A (en) | 2022-03-15 |
Family
ID=80540394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111371632.5A Pending CN114184546A (en) | 2021-11-18 | 2021-11-18 | Laser probe quartz content rapid analysis device, TBM and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114184546A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115248205A (en) * | 2022-07-06 | 2022-10-28 | 苏州星帆华镭光电科技有限公司 | Laser-induced breakdown spectrometer |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811385A (en) * | 2006-02-14 | 2006-08-02 | 南京中地仪器有限公司 | Laser induced plasma spectral analysis method and spectroanalysis instrument |
| US20080259330A1 (en) * | 2007-04-20 | 2008-10-23 | Robert Dillon | Laser-triggered plasma apparatus for atomic emission spectroscopy |
| CN101696936A (en) * | 2009-10-22 | 2010-04-21 | 浙江师范大学 | Laser induced discharge reinforcement plasma spectrum detection device |
| CN103076310A (en) * | 2012-12-28 | 2013-05-01 | 深圳大学 | Spectrum detection system for material component analysis and detection method thereof |
| CN203465202U (en) * | 2013-09-27 | 2014-03-05 | 武汉新瑞达激光工程有限责任公司 | Portable laser probe component analysis device |
| CN203705342U (en) * | 2014-01-15 | 2014-07-09 | 浙江师范大学 | Alternating magnetic field intensifying laser inducing plasma light spectrum detection device |
| CN105067593A (en) * | 2015-07-10 | 2015-11-18 | 长春理工大学 | Electrostatic assistance enhanced LIBS (laser induced breakdown spectroscopy) device for detecting heavy metal elements in sewage |
| CN105136752A (en) * | 2015-09-25 | 2015-12-09 | 清华大学 | Online powder detecting device and measuring method based on laser-induced breakdown spectroscopy |
| US20160084709A1 (en) * | 2013-01-21 | 2016-03-24 | Sciaps, Inc. | Handheld libs spectrometer |
| CN105486676A (en) * | 2015-12-25 | 2016-04-13 | 中国科学院合肥物质科学研究院 | Microwave-assisted laser-induced breakdown spectrum device |
| US20160116416A1 (en) * | 2014-10-22 | 2016-04-28 | Bwt Property, Inc. | Substrate Enhanced Laser-Induced Breakdown Spectroscopy (LIBS) Apparatus |
| CN106645375A (en) * | 2016-12-29 | 2017-05-10 | 华中科技大学 | Element analysis method for overcoming matrix interference in laser-induced breakdown spectrum |
| KR20180014349A (en) * | 2016-07-29 | 2018-02-08 | 연세대학교 산학협력단 | Apparatus and method for plasma process measurement |
| CN112666197A (en) * | 2020-11-29 | 2021-04-16 | 山东大学 | Rock slag quartz content testing system and method for TBM |
| CN113310949A (en) * | 2021-05-24 | 2021-08-27 | 山东大学 | Hyperspectral imaging-based TBM tunnel-mounted rock slag mineral identification system and method |
-
2021
- 2021-11-18 CN CN202111371632.5A patent/CN114184546A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811385A (en) * | 2006-02-14 | 2006-08-02 | 南京中地仪器有限公司 | Laser induced plasma spectral analysis method and spectroanalysis instrument |
| US20080259330A1 (en) * | 2007-04-20 | 2008-10-23 | Robert Dillon | Laser-triggered plasma apparatus for atomic emission spectroscopy |
| CN101696936A (en) * | 2009-10-22 | 2010-04-21 | 浙江师范大学 | Laser induced discharge reinforcement plasma spectrum detection device |
| CN103076310A (en) * | 2012-12-28 | 2013-05-01 | 深圳大学 | Spectrum detection system for material component analysis and detection method thereof |
| US20160084709A1 (en) * | 2013-01-21 | 2016-03-24 | Sciaps, Inc. | Handheld libs spectrometer |
| CN203465202U (en) * | 2013-09-27 | 2014-03-05 | 武汉新瑞达激光工程有限责任公司 | Portable laser probe component analysis device |
| CN203705342U (en) * | 2014-01-15 | 2014-07-09 | 浙江师范大学 | Alternating magnetic field intensifying laser inducing plasma light spectrum detection device |
| US20160116416A1 (en) * | 2014-10-22 | 2016-04-28 | Bwt Property, Inc. | Substrate Enhanced Laser-Induced Breakdown Spectroscopy (LIBS) Apparatus |
| CN105067593A (en) * | 2015-07-10 | 2015-11-18 | 长春理工大学 | Electrostatic assistance enhanced LIBS (laser induced breakdown spectroscopy) device for detecting heavy metal elements in sewage |
| CN105136752A (en) * | 2015-09-25 | 2015-12-09 | 清华大学 | Online powder detecting device and measuring method based on laser-induced breakdown spectroscopy |
| CN105486676A (en) * | 2015-12-25 | 2016-04-13 | 中国科学院合肥物质科学研究院 | Microwave-assisted laser-induced breakdown spectrum device |
| KR20180014349A (en) * | 2016-07-29 | 2018-02-08 | 연세대학교 산학협력단 | Apparatus and method for plasma process measurement |
| CN106645375A (en) * | 2016-12-29 | 2017-05-10 | 华中科技大学 | Element analysis method for overcoming matrix interference in laser-induced breakdown spectrum |
| CN112666197A (en) * | 2020-11-29 | 2021-04-16 | 山东大学 | Rock slag quartz content testing system and method for TBM |
| CN113310949A (en) * | 2021-05-24 | 2021-08-27 | 山东大学 | Hyperspectral imaging-based TBM tunnel-mounted rock slag mineral identification system and method |
Non-Patent Citations (1)
| Title |
|---|
| 刘艳丽: "激光诱导击穿光谱技术在钢渣分析的研究进展", 《理化检验-化学分册》, vol. 56, pages 1035 - 1044 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115248205A (en) * | 2022-07-06 | 2022-10-28 | 苏州星帆华镭光电科技有限公司 | Laser-induced breakdown spectrometer |
| CN115248205B (en) * | 2022-07-06 | 2023-11-21 | 苏州星帆华镭光电科技有限公司 | Laser-induced breakdown spectrometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7251022B2 (en) | Dual fiber microprobe for mapping elemental distributions in biological cells | |
| KR101217712B1 (en) | A prompt gamma-ray detection apparatus for analyzing chemical materials by using femto second pulse laser induced neutrons | |
| CN105044052A (en) | Laser spectrum analysis method and device for elements in liquid | |
| CN114184546A (en) | Laser probe quartz content rapid analysis device, TBM and method | |
| Senesi et al. | An innovative approach to meteorite analysis by laser‐induced breakdown spectroscopy | |
| CN101782517A (en) | Laser probe micro-area component analyzer based on double laser light source | |
| CN103728282B (en) | The instrument analytical method of inclusion content in a kind of Fast Measurement material | |
| CZ306708B6 (en) | A device for mass spectrometry | |
| JP6760694B2 (en) | Insulator pollution measurement method, measuring device, and measurement program | |
| CN107607521B (en) | A kind of tealeaves heavy metal analysis device and its detection method | |
| CN102841076B (en) | Spectrometer apparatus using continuous wave laser and photomultiplier tube | |
| Abdrashitov et al. | A diagnostic neutral beam system for the MST reversed-field pinch | |
| EP2881974B1 (en) | Method and device for controlling reactive sputtering deposition | |
| CN108459012A (en) | Portable laser plasma spark electric discharge component spectrum detecting system | |
| CN108088813B (en) | On-line detection device for metal elements in molten salt | |
| CN207457076U (en) | A kind of tealeaves heavy metal analysis device | |
| CN102621578B (en) | Optical measurement method of charged particle beam energy | |
| CN106338499A (en) | Element laser detection and analysis instrument and mineral element analysis method | |
| Acerbi et al. | Design and performance of the ENUBET monitored neutrino beam | |
| JP4176024B2 (en) | Lithium leak detection device and lithium leak detection method | |
| Liu et al. | Laser-induced breakdown spectroscopy-based coal-rock recognition: An in situ sampling and recognition method | |
| CN203881709U (en) | Recognition device for laser-induced damage of optical thin film | |
| KR101052944B1 (en) | Portable nuclide analyzing apparatus for soil | |
| CN214097166U (en) | Concrete corrosion state detection system | |
| Hameed et al. | Determination of the Fertility of Southern Iraqi Soil Using Laser-Induced Breakdown Spectroscopy System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |