CN106568506B - A kind of arc spectrum synchronization real time scan Linear Multi-channel acquisition method - Google Patents
A kind of arc spectrum synchronization real time scan Linear Multi-channel acquisition method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
Abstract
The invention discloses a kind of synchronous real time scan Linear Multi-channel acquisition methods of arc spectrum, including the scanning of plane dynamic arc, Linear Multi-channel acquisition and synchronous real-time triggering；Wherein, synchronizing triggering in real time includes when the movement of spectra collection platform is in halted state, and spectrum time-series rules and trigger circuit detect conditions at the arc, and trigger judges conditions at the arc；The scanning of plane dynamic arc includes after the spectral information for the electric arc that spectrum time-series rules are in different instantaneous states from trigger circuit triggers spectrometer collection, terminate trigger, and the motion control signal of output is pulled to high level, then the motion motor of starting motion controller control spectra collection platform, drives linear array optical fiber to be moved to new acquisition position；Linear Multi-channel acquisition realizes that the entry port of linear array optical fiber is arranged on the imaging optical screen of spectrum imaging system, is also secured on the structure of fiber_optic of spectra collection platform by linear array optical fiber；Exit portal is fixed on spectrometer.
Description
Technical field
The present invention relates to electronic surveying and control field more particularly to a kind of synchronous linear multi-pass of real time scan of arc spectrum
Road acquisition method.
Background technique
Welding plasma includes information abundant, therefore is widely used in studying plasma physics and in real time prison
Control welding process.The temperature of plasma, electron number densitiy are difficult with method measured directly and obtain, and generally require by right
The diagnosis of radiation spectrum obtains spectral information.Therefore, in the research of plasma, it is very heavy to obtain reliable spectral information
It wants.
To in the spectroscopic diagnostics of welding process plasma, because arc-plasma is in space different location and difference
Temperature, the electron density at moment are also particularly significant.So not only needing to acquire the frequency domain information of plasma radiation spectrum, it is also desirable to
Obtain complete space and time-domain information.In the prior art, researcher etc. regards plasma as a uniform radiation
Body acquires radiation spectrum by the single-core fiber of single fixation and is diagnosed, and the spectrum at this time acquired cannot objectively reflect
The spatial information of plasma, it is difficult to which the space distribution rule of plasma carries out in-depth study.
In order to study the space distribution rule of plasma, researcher utilizes single by motor driven fibre-optical probe
Optical fiber acquires the radiation spectrum in plasma flat point by point, and this method acquisition speed acquired point by point is slow, when required
Between it is long, due to plasma resonance fluctuation have biggish error.When in addition being acquired to the time-domain information of spectrum, it can only acquire
The spectral information of plasma certain point radiation can not synchronize acquisition to the plasma resonance of multiple points simultaneously and grind
Study carefully.
Arc-plasma is projected in the narrow of multi-channel spectrometer (MDA) using optical imagery microscope group by another method
It sews on, takes light using slit, to obtain a line glazing spectrum information simultaneously.This method can be obtained by driving imaging microscope group
Obtain the plasma spectrometry in a plane.But the reflection microscope group that this method needs is excessively complicated, and plasma resonance
By multiple groups reflecting mirror refraction after light intensity attenuation it is serious, the signal strength of the radiation spectrum obtained in this way often compared with
It is weak.
And when acquiring the dynamic time-domain information of spectrum, by the industrial computer equipped with data collecting card to voltage signal
It is acquired, and triggering is synchronized to the condition conditions at the arc of satisfaction with Labview software.The mode equipment of this synchronous triggering
Investment is big, and method is complicated.Output triggers when document is only in peak state and base value state to arc signal simultaneously, therefore this
Method has limitation.
Document " CO2Laser+pulsed GMAW composite welding plasma behavior and droplet transfer control research " utilize logic
The method of decision circuitry is that peak state, base value state and negative electricity stream mode judge, and occur automatically to conditions at the arc
Start pulse signal obtains corresponding spectral information.But a kind of this method does not have programmability, and flexibility is low, can not be directed to
Pulsed arc discharge plasma triggers spectrometer collection in any transient state of peak state and base value state.
In conclusion existing slow with the method acquisition speed acquired point by point, the required time is long, due to plasma
Radiating fluctuation has biggish error.When in addition acquiring to the time-domain information of spectrum, the radiation of plasma certain point can only be acquired
Spectral information, can not simultaneously acquisition and research are synchronized to the plasma resonance of multiple points.And it is existing imaging it is narrow
The reflection microscope group that seam takes light method to need is excessively complicated, and plasma resonance light intensity attenuation after the refraction of multiple groups reflecting mirror is tight
Weight, the signal strength of the radiation spectrum obtained in this way are often weaker.
Existing technology is only in peak state and base to arc signal when synchronizing real-time acquisition to plane arc
Triggering is exported when state of value, can not be touched for any transient state in peak state and base value state of pulsed arc discharge plasma
Shine spectrometer acquisition, therefore this method has limitation.
During analyzing and researching to arc radiation, it is intended that obtain any time when electric arc is in different conditions
Time-domain information；While in order to study the distribution of electric arc spatially, it is desirable to which synchronization is in same horizontal line points
The arc spectral information of the different location of cloth is acquired and comparative analysis, and is able to achieve to the spectrum letter in entire electric arc plane
Cease the dynamic scan within the short time as far as possible.
Therefore, those skilled in the art is dedicated to developing a kind of arc spectrum synchronization real time scan Linear Multi-channel acquisition
Device.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to a kind of arc spectrums to synchronize reality
When scanning linearity multichannel collecting device, with realize to the plasma radiation that plane arc is distributed multiple points synchronize acquisition with
And research, entire plane arc is scanned, the dynamic arc information of entire plane is obtained in the short time, is realized in peak
The arc radiation spectral information of any different moments is acquired in real time respectively when value or base value state.
To achieve the above object, the present invention provides a kind of synchronous real time scan Linear Multi-channel acquisition sides of arc spectrum
Method, including the scanning of plane dynamic arc, Linear Multi-channel acquisition and synchronous real-time triggering；Wherein
Synchronizing triggering in real time includes spectrum time-series rules and triggering electricity when the movement of spectra collection platform is in halted state
Road trigger is detected and is judged to conditions at the arc, and output light spectrometer touches when electric arc is in required instantaneous state
It signals；
The scanning of plane dynamic arc includes when spectrum time-series rules and trigger circuit triggers spectrometer collection terminate in not
After spectral information with the electric arc of instantaneous state, terminator is triggered, and the motion control signal of output is pulled to high level, so
The motion motor of starting motion controller control spectra collection platform afterwards, drives linear array optical fiber to be moved to new acquisition position
It sets；
Linear Multi-channel acquisition realizes by linear array optical fiber, the entry port of linear array optical fiber be arranged spectrum at
As the center of the imaging optical screen of system, it is also secured on the structure of fiber_optic of spectra collection platform；Exit portal end is fixed on
The entrance slit entrance of spectrometer.
Further, spectrometer is multi-channel spectrometer, and spectra collection platform is one-dimensional removable spectra collection platform.
Further, the entry port of linear array optical fiber be set as fibre core linear array insertion spectrum imaging system at
As the center of optical screen, exit ports are set as the entrance slit entrance that fibre core vertical arrangement is fixed on multi-channel spectrometer.
Further, dynamic arc is incident upon on imaging optical screen by spectrum imaging system, by entering for linear array optical fiber
It penetrates port while acquiring radiation different on same straight line, be transferred into multi-channel spectral from exit ports after transposition in optical fiber
The entrance slit entrance of instrument.
Further, structure of fiber_optic is vertically movable, and the fibre core orientation of incidence end is changeable.
Further, the core of spectrum time-series rules and trigger circuit is made of system-level single-chip microcontroller.
Further, trigger is set as when first input end input high level of the motion controller to single-chip microcontroller,
Start the trigger of single-chip microcontroller.
Further, the motion control signal of output is pulled to low level by single-chip microcontroller, and the arc current acquisition that will test
The voltage analog signal of sensor is converted to digital signal, and compares the threshold value set in digital signal and trigger
Compared with obtaining corresponding rising edge state and failing edge state.
Further, when single-chip microcontroller detects that the electric current of electric arc reaches the threshold value of rising edge state, there is single-chip microcontroller to more
Channel spectrum instrument output timing trigger signal, acquisition electric arc are located at the different instantaneous Spectral Radiation Informations of peak state.
Further, when single-chip microcontroller detects that the electric current of electric arc reaches the threshold value of failing edge state, there is single-chip microcontroller to more
Channel spectrum instrument output timing trigger signal, acquisition electric arc are located at the different instantaneous Spectral Radiation Informations of base value state.
To realize the above method, the present invention also provides a kind of synchronous real time scan Linear Multi-channel acquisition dresses of arc spectrum
It sets, including arc current acquires sensor, spectrum imaging system, spectra collection platform, motion controller, spectrometer, when spectrum
Sequence detection and trigger circuit, linear array optical fiber and computer；
Wherein, arc current acquisition sensor passes through the first input end of signal wire and spectrum time-series rules and trigger circuit
It is connected, and acquires arc current signal, the external trigger of the output end and spectrometer of spectrum time-series rules and trigger circuit connects
Mouth is connected, and the spectral signal end of spectrometer passes through the spectral signal that signal wire is connected with computer, and spectrometer collection is arrived
Input computer；Spectrum time-series rules and the second input terminal and second output terminal of trigger circuit respectively with motion controller
One output end is connected with first input end, and the second output terminal of motion controller is connected with the motion motor of spectra collection platform
It connecing, the first end of linear array optical fiber is embedded in spectrum imaging system, it is also secured on the structure of fiber_optic of spectra collection platform,
The second end of linear array optical fiber is fixed on the entrance slit entrance of spectrometer；Spectrum imaging system includes imaging optical screen, light
Spectrum imaging system connects into an entirety by imaging optical screen and spectra collection platform.
Further, spectra collection platform is one-dimensional removable spectra collection platform, and spectrometer is multi-channel spectrometer.
Further, spectrum imaging system includes optics guide rail, convex lens, diaphragm and imaging optical screen, convex lens and diaphragm
It is mounted on optics guide rail, the center at the center of convex lens, the aperture of diaphragm and imaging optical screen is on same straight line.
Further, convex lens and diaphragm are arranged to move on optics guide rail, and the length of optics guide rail is
1.8-2.3 rice.
Further, linear array optical fiber is set as being made of fiber core linear array, the incidence of linear array optical fiber
On the spectrum imaging system that the fibre core linear array at end is embedded in, and it is set as simultaneously in the structure of fiber_optic of spectra collection platform
On, and can be vertically moved on spectra collection platform；The fibre core vertical arrangement of the exit end of linear array optical fiber is fixed on spectrum
The entrance slit entrance of instrument.
Further, imaging optical screen is fixed on one-dimensional removable spectra collection platform.
Further, the core of spectrum time-series rules and trigger circuit is made of system-level single-chip microcontroller, the inspection of spectrum timing
It surveys and is set as after spectra collection platform is in halted state with trigger circuit, start the list of spectrum time-series rules and trigger circuit
Trigger in piece machine is detected and is judged to conditions at the arc, and the output light when electric arc is in required instantaneous state
Spectrometer trigger signal.
Further, the motion motor of one-dimensional removable spectra collection platform passes through motion controller to spectrum time-series rules
Low level is exported with trigger circuit, for stopping spectrum time-series rules and trigger circuit.
Further, the motion motor of one-dimensional removable spectra collection platform passes through motion controller to spectrum time-series rules
High level is exported with trigger circuit, for triggering spectrum time-series rules and trigger circuit.
Further, when the motion state signal that motion controller receives is high level, spectrum time-series rules and triggering electricity
After road is detected and judged to the state of electric arc by the voltage signal that arc current acquires sensor, to multi-channel spectrometer
Trigger signal is exported, synchronous triggering multi-channel spectrometer acquisition is transferred into the same of entrance slit entrance by linear array optical fiber
The arc radiation spectrum of multiple points on one straight line.
Technical effect
1, believed using the arc current that analog-digital converter ADC in the piece of system-level single-chip microcontroller obtains electric arc acquisition sensor
It number is acquired and converts, carry out quick comparison and operation using the high-speed CPU core of single-chip microcontroller, pass through the certain judgement of setting
Condition can judge rapidly electric arc state in which and export to meet to need the trigger signal of condition, thus guarantee no matter electric arc
Any time in peak value or base value, spectrometer hardware trigger circuit can synchronize triggering spectrometer, realize in peak
The arc radiation spectral information of any different moments is acquired in real time respectively when value or base value state；
2, the linear array fibre of multicore and multi-channel spectrometer are utilized, it is ensured that while obtaining and being located along the same line not
With the arc radiation spectrum on location point, reaches that the momentary arc linear distribution characteristics at a certain moment analyze and grind
Study carefully；
3, it by the one-dimensional removable spectra collection platform of spectrum hardware trigger circuit control, may be implemented to entire plane electricity
Arc is progressively scanned, and the dynamic arc information of entire plane is obtained in the short time；
4, the arc radiation of difference on same straight line can be acquired simultaneously by the optical fiber of linear array, and can be led to
This acquisition method realization is crossed to scan the line of entire electric arc plane；The radiation letter of multiple and different points on straight line can be acquired simultaneously
There is faster scanning speed when ceasing, and carrying out flat scanning to electric arc；It is acquired by the direction of linear adjustment array different
Point on the straight line of orientation, and do not need excessively complicated imaging system, avoid the decaying of optical imaging system bring and
Error；
5, the device of the invention is programmable, can be by programming to any time electricity in peak value or base value
Arc exports the synchronous triggering spectrometer of trigger signal.To single-chip microcontroller be programmed control it is simpler and flexible, investment it is also smaller, it is right
Platform of hardware requires all very low.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is a kind of synchronous real time scan Linear Multi-channel acquisition dress of arc spectrum of a preferred embodiment of the invention
The structural schematic diagram set.
Fig. 2 is a kind of synchronous real time scan Linear Multi-channel acquisition side of arc spectrum of a preferred embodiment of the invention
The structural schematic diagram of the spectra collection stage apparatus of method.
Fig. 3 is a kind of synchronous real time scan Linear Multi-channel acquisition side of arc spectrum of a preferred embodiment of the invention
The spectrum time-series rules and trigger circuit time diagram of method.
Fig. 4 is a kind of synchronous real time scan Linear Multi-channel acquisition side of arc spectrum of a preferred embodiment of the invention
The spectrum time-series rules and trigger circuit block diagram representation of method.
Specific embodiment
As shown in Figure 1, to provide a kind of synchronous real time scan of arc spectrum linearly more for a preferred embodiment of the invention
Channel acquisition device, including arc current acquisition sensor 1, spectrum imaging system 2, spectra collection platform 3, motion controller 4,
Spectrometer 5, spectrum time-series rules and trigger circuit 6, linear array optical fiber 7 and computer 8；Preferably, spectra collection platform is
One-dimensional removable spectra collection platform.Wherein, arc current acquisition sensor 1 passes through signal wire and spectrum time-series rules and triggering
The first input end of circuit 6 is connected, and acquires the arc current signal of arc current sensor 1, spectrum time-series rules and touching
The output end of Power Generation Road 6 is connected with the external trigger interface of spectrometer 5, the spectral signal end of spectrometer 5 by signal wire with
Computer 8 is connected, and the collected spectral signal of spectrometer 5 is inputted computer 8；Spectrum time-series rules and trigger circuit 6
Second input terminal is connected with the first output end and first input end of motion controller 4 respectively with second output terminal, movement control
The second output terminal of device 4 processed is connected with the motion motor of spectra collection platform, and the first end of linear array optical fiber is fixed on
On the structure of fiber_optic of spectra collection platform, the second end of linear array optical fiber is fixed on the entrance slit entrance of spectrometer.
Wherein the first input end of motion controller 4 is control signal input, and the first output end of motion controller 4 is
Status signal output.As shown in Figure 1, the control signal input and status signal output of motion controller are controlled in movement
The side of device processed, and be connected respectively with acquisition spectrum time-series rules with the second output terminal of trigger circuit and the second input terminal
It connects.
Spectrum time-series rules connect the first output end of motion controller 4 with the second input terminal of trigger circuit 6, for anti-
The starting of motion state control circuit trigger is presented, spectrum time-series rules connect movement with the second output terminal of trigger circuit 6
The first input end of controller 4 controls 4 setting in motion of motion controller, composition one for spectrum time-series rules and trigger circuit 6
To bi-directional control signal.
Spectrum imaging system 2 includes optics guide rail 21, convex lens 22, diaphragm 23 and imaging optical screen 24.Convex lens 22,
Diaphragm 23 and imaging optical screen 24 are mounted on optics guide rail 21；Center, 23 aperture of diaphragm and the imaging optical screen 24 of convex lens 22
Center be located along the same line.Spectrum imaging system 2 utilizes convex lens imaging principle, and dynamic arc passes through convex lens and diaphragm
It is imaged on imaging optical screen.Diaphragm is mounted at convex lens back focus position, guarantees the arc radiation luminous energy for there was only horizontal emission
It is imaged by the aperture of diaphragm in optical screen；Image distance is adjusted by changing convex lens and the relative distance of optical screen being imaged, needed for acquisition
The inverted image of the electric arc of size.Preferably, convex lens is quartzy convex lens.
Optics rail length in a preferred embodiments of the invention is 1.8-2.3 meters, it is therefore preferable to 2 meters.Convex lens used
Focal length is 300mm, passes through convex lens imaging principle, it is easy to can calculate convex lens 22, diaphragm 23, imaging optical screen 24 in light
The position that should locate on guide rail is learned, such as: when 1:1 being needed to be imaged, with electric arc position for 0 point, convex lens 22, diaphragm 23, imaging
24 position distribution of optical screen be 600mm, 900mm and 1200mm, object distance and at a distance of be 600mm (1:1).By adjust convex lens 22,
Diaphragm 23, the position that optical screen 24 is imaged, the size of adjustable electric arc imaging, to guarantee that institute will need the electric arc spoke that acquires
It penetrates and is projected in the acquisition range of array fibre by convex lens.In a preferred embodiment of the invention, contained 20 220 μm of fibres
Core, acquisition range 4.4mm.
A preferred embodiment of the invention provides a kind of arc spectrum synchronization real time scan Linear Multi-channel acquisition method,
Including the scanning of plane dynamic arc, Linear Multi-channel acquisition and synchronous real-time triggering；Wherein,
Synchronizing triggering in real time includes spectrum time-series rules and triggering electricity when the movement of spectra collection platform is in halted state
Road trigger is detected and is judged to conditions at the arc, and output light spectrometer touches when electric arc is in required instantaneous state
It signals；
The scanning of plane dynamic arc includes when spectrum time-series rules and trigger circuit triggers spectrometer collection terminate in not
After spectral information with the electric arc of instantaneous state, terminator is triggered, and the motion control signal of output is pulled to high level, so
The motion motor of starting motion controller control spectra collection platform afterwards, drives linear array optical fiber to be moved to new acquisition position
It sets；
Linear Multi-channel acquisition realizes that the entry port of the linear array optical fiber is arranged in light by linear array optical fiber
The center of the imaging optical screen of spectrum imaging system, is also secured on the structure of fiber_optic of the spectra collection platform；Exit portal
End is fixed on the entrance slit entrance of the spectrometer.
A preferred embodiment of the invention provides a kind of arc spectrum synchronization real time scan Linear Multi-channel acquisition method
Specific explanations are as follows:
Arc current acquires sensor 1 and exports the voltage signal that collected arc current signal is converted to 0~3.3V
To spectrum time-series rules and trigger circuit 6.
It to spectrum time-series rules and is triggered when the motion motor setting in motion of spectra collection platform 3 by motion controller 4
Circuit 6 exports low level, for stopping spectrum time-series rules and trigger circuit 6；Stop in the motion motor of spectra collection platform 3
High level is exported to spectrum time-series rules and trigger circuit 6 by motion controller 4 when movement, for triggering spectrum time-series rules
With trigger circuit 6.
When the motion state signal that motion controller 4 exports is high level, spectrum time-series rules pass through with trigger circuit 6
After the voltage signal of arc current acquisition sensor 1 is detected and judged to conditions at the arc, triggering letter is exported to spectrometer 5
Number, synchronous triggering spectrometer 5 is to the multiple points being transferred on the same straight line of entrance slit entrance by linear array optical fiber
Arc radiation spectrum simultaneously acquired in real time.
Spectrum time-series rules are adopted with trigger circuit 6 in the spectrum that triggering spectrometer 5 completes 7 present position of linear array optical fiber
After collection, output trigger signal is terminated, and export motion control signal to motion controller 4, starting motion controller controls spectrum
Motion motor on acquisition platform 3 drives the linear array optical fiber 7 being fixed on acquisition platform mobile in vertical direction, and to
The first input end input motion status signal of spectrum time-series rules and trigger circuit 6.Linear array optical fiber 7 is moved to new adopt
After set point location, restarting spectrum time-series rules and trigger circuit 6 control multi-channel spectrometer 5 and start to carry out the light of a new round
Spectrum acquisition, progressively scans plane dynamic arc spectrum to realize.
Linear array optical fiber 7 is made of one group of fiber core linear array.In a preferred embodiment of the invention, linearly
Array fibre 7 is made of 20 220 microns of ultraviolet silica core linear array.The entry port of linear array optical fiber 7
Fibre core linear array be embedded in spectrum imaging system 2 imaging optical screen 24 center, be also secured to one-dimensional removable
On the structure of fiber_optic of spectra collection platform 3, and structure of fiber_optic can vertically move on spectra collection platform 3；Exit ports
Fibre core is arranged vertically the entrance slit inlet for being fixed on spectrometer 5.The structure of fiber_optic of spectra collection platform 3 be fixed on spectrum at
As the center of the imaging optical screen 24 of system 2.Dynamic arc is incident upon imaging 24 center of optical screen by spectrum imaging system 2
On, acquire the radiation for the difference that is located along the same line simultaneously by 7 entry port linear array fibre core array of linear array optical fiber,
Enter longitudinal entrance slit of spectrometer 5 after transposition from the fibre core Array transfer that exit ports are arranged vertically in optical fiber.Pass through
Vertically move the spectrum that can obtain electric arc different location of the structure of fiber_optic of spectra collection platform 3；The fibre core of incident section arranges
Direction can change, and the direction by changing the arrangement of incidence end fibre core can acquire that electric arc is horizontal, vertical or any other side
The spectral information of multiple points on straight line.
As shown in Fig. 2, imaging optical screen 24 is fixed on the structure of fiber_optic on one-dimensional removable spectra collection platform 3, it is imaged
The center of optical screen 24 is embedded into linear array optical fiber 7.Imaging 24 one side of optical screen be spectrum imaging system 2 at real image position
It sets, is on the other hand the interface for the fibre core that arc radiation light enters linear array optical fiber 7.And in arc center, convex lens 22
The heart, diaphragm 23 center, the center of optical screen 24 is imaged and the center of linear array optical fiber 7 is on same straight line, electric arc
It is finally imaged, and required adopted on imaging optical screen 24 by the convex lens 22 and 23 central small hole of diaphragm of spectrum imaging system 2
Arc radiation light on the linear array of collection is able to enter in the fibre core in array fibre embedded in imaging 24 center of optical screen,
It is ultimately transferred to spectrometer.Imaging optical screen connects spectrum imaging system 2, spectra collection platform 3 and linear array optical fiber 7
For an entirety.
The core of spectrum time-series rules and trigger circuit 6 is made of system-level single-chip microcontroller, when spectra collection platform is transported
Dynamic 3 after halted state, and the trigger started in single-chip microcontroller is detected and judged to conditions at the arc, and is in electric arc
Output light spectrometer trigger signal when required instantaneous state.The trigger of spectrum time-series rules and trigger circuit 6 are as follows: work as fortune
When movement controller 4 is to single-chip microcontroller first input end input high level, start single-chip microcontroller trigger.
System-level single-chip microcontroller (System on Chip, SoC) is also called system on chip, is that one kind incorporates partially or completely
The electronic circuit of system and SCM system containing embedded software.As public using Silicon Labs in present example
Take charge of the F8051 serial system grade single-chip microcontroller released, incorporate in system high-precision analog-digital converter (ADC) and its
The instruction processing capacity of Cygnal-51 kernel is powerful, can guarantee and exports trigger signal in time when reaching trigger condition.
The motion control signal of output is pulled to low level by single-chip microcontroller, and starts first timer with the modulus in control sheet
The voltage analog signal for the arc current acquisition sensor 1 that converter ADC will test with the sample frequency of 100kHz is converted to number
Word signal, and store into register.The CPU of single-chip microcontroller to the threshold value set in collected voltage value and trigger into
Row compares, and obtains corresponding rising edge state and failing edge state.When single-chip microcontroller detects that the electric current of electric arc reaches rising edge shape
When threshold value when state or failing edge state, be gradually delayed different time by second timer, from the second input terminal of single-chip microcontroller to
6 output timing trigger signal of multi-channel spectrometer, acquisition electric arc are located at peak value or the different instantaneous spectral radiance letters of base value state
Breath.
After the single-chip microcontroller triggering acquisition of multi-channel spectrometer 5 terminates the spectral information of the electric arc in different instantaneous states,
The CPU core of single-chip microcontroller terminates trigger, and the motion control signal of output is pulled to high level, starts motion controller 4
The motion motor of spectra collection platform 3 is controlled, linear array optical fiber 7 is driven to move vertically to new acquisition position.
Arc current acquires the touching that conditions at the arc signal, spectrum time-series rules and the trigger circuit 6 that sensor 1 acquires export
It signals and the spectroscopic data information of the correspondence conditions at the arc of the acquisition of multi-channel spectrometer 5 is inputted in computer 8 and stored.
A kind of synchronous real time scan Linear Multi-channel acquisition device of arc spectrum of the invention, utilizes system-level single-chip microcontroller
The arc current signal that analog-digital converter ADC obtains electric arc acquisition sensor in piece is acquired and converts, and utilizes single-chip microcontroller
High-speed CPU core carry out quick comparison and operation, by the way that certain decision condition is arranged, can judge rapidly locating for electric arc
State, which simultaneously exports to meet, needs the trigger signal of condition, thus guarantee no matter any time that electric arc is in peak value or base value,
Spectrometer hardware trigger circuit can synchronize triggering spectrometer, any different moments when realizing in peak value or base value state
Arc radiation spectral information is acquired in real time respectively；And it, can using the linear array fibre of multicore and multi-channel spectrometer
To guarantee while obtain the arc radiation spectrum being located along the same line on different location point, reach the instantaneous electricity to a certain moment
The linear distribution characteristics of arc spectrum is analyzed and researched；It is flat by the one-dimensional removable spectra collection of spectrum hardware trigger circuit control
Platform may be implemented to progressively scan entire plane arc, and the dynamic arc information of entire plane is obtained in the short time.
A kind of synchronous optical fiber of the real time scan Linear Multi-channel acquisition method by linear array of arc spectrum of the invention
The arc radiation of difference on same straight line can be acquired simultaneously, and can be realized by this acquisition method to entire electric arc
The line of plane scans.The point on the straight line of different orientation is acquired by the direction of linear adjustment array, and is not needed excessively multiple
Miscellaneous imaging system avoids the decaying of optical imaging system bring and error；The device of the invention is programmable, can be with
The synchronous triggering spectrometer of trigger signal is exported to any time electric arc in peak value or base value by programming.To single-chip microcontroller into
Row programming Control is simpler and flexible, and investment is also smaller, requires Platform of hardware all very low.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (7)
1. a kind of synchronous real time scan Linear Multi-channel acquisition method of arc spectrum, which is characterized in that including plane dynamic arc
Scanning, Linear Multi-channel acquisition and synchronous real-time triggering；Wherein
Synchronizing triggering in real time includes spectrum time-series rules and trigger circuit pair when the movement of spectra collection platform is in halted state
Conditions at the arc are detected, and trigger judges conditions at the arc, and defeated when electric arc is in required instantaneous state
Spectrometer trigger signal out；
The scanning of plane dynamic arc includes being in different instantaneous shapes from trigger circuit triggers spectrometer collection when spectrum time-series rules
After the spectral information of the electric arc of state, trigger is terminated, and the motion control signal of output is pulled to high level, then opened
The motion motor of dynamic motion controller control spectra collection platform, drives linear array optical fiber to be moved to new acquisition position, so
The spectrum time-series rules are restarted afterwards and trigger circuit controls the spectrometer and starts to carry out the spectra collection of a new round, from
And it realizes and plane dynamic arc spectrum is progressively scanned；
Linear Multi-channel acquisition realizes that the linear array optical fiber is by 20 220 microns of ultraviolet stone by linear array optical fiber
English fibre core linear array composition, the entry port of the linear array optical fiber are arranged in the imaging optical screen of spectrum imaging system
Heart position is also secured on the structure of fiber_optic of the spectra collection platform；Exit ports are fixed on the incidence of the spectrometer
Slotted inlets, the structure of fiber_optic is vertically movable, and the fibre core orientation of the entry port is changeable；
The spectrometer is multi-channel spectrometer, and the spectra collection platform is one-dimensional removable spectra collection platform；
The core of the spectrum time-series rules and trigger circuit is made of system-level single-chip microcontroller.
2. a kind of arc spectrum as described in claim 1 synchronizes real time scan Linear Multi-channel acquisition method, which is characterized in that
The entry port of the linear array optical fiber is set as the imaging optical screen that fibre core linear array is embedded in the spectrum imaging system
Center, the exit ports are set as the entrance slit entrance that fibre core vertical arrangement is fixed on the multi-channel spectrometer.
3. a kind of arc spectrum as claimed in claim 2 synchronizes real time scan Linear Multi-channel acquisition method, which is characterized in that
Dynamic arc is incident upon on the imaging optical screen by the spectrum imaging system, by the entry port of the linear array optical fiber
Radiation different on same straight line is acquired simultaneously, is transferred into the multichannel light from the exit ports after transposition in optical fiber
The entrance slit entrance of spectrometer.
4. a kind of arc spectrum as described in claim 1 synchronizes real time scan Linear Multi-channel acquisition method, which is characterized in that
The trigger is set as when first input end input high level of the motion controller to the single-chip microcontroller, starts single-chip microcontroller
Trigger.
5. a kind of arc spectrum as claimed in claim 4 synchronizes real time scan Linear Multi-channel acquisition method, which is characterized in that
The motion control signal of output is pulled to low level by the single-chip microcontroller, and the voltage-mode for the arc current acquisition sensor that will test
Quasi- signal is converted to digital signal, and is compared to the threshold value set in the digital signal and the trigger, obtains
Corresponding rising edge state and failing edge state.
6. a kind of arc spectrum as claimed in claim 5 synchronizes real time scan Linear Multi-channel acquisition method, which is characterized in that
When the single-chip microcontroller detects that the electric current of electric arc reaches the threshold value of rising edge state, from the single-chip microcontroller to the multichannel light
Spectrometer output timing trigger signal, acquisition electric arc are located at the different instantaneous Spectral Radiation Informations of peak state.
7. a kind of arc spectrum as claimed in claim 6 synchronizes real time scan Linear Multi-channel acquisition method, which is characterized in that
When the single-chip microcontroller detects that the electric current of electric arc reaches the threshold value of failing edge state, from the single-chip microcontroller to the multichannel light
Spectrometer output timing trigger signal, acquisition electric arc are located at the different instantaneous Spectral Radiation Informations of base value state.
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| CN102607700A (en) * | 2012-03-06 | 2012-07-25 | 上海交通大学 | Device for scanning and acquiring plane dynamic arc spectrum in real time |
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| CN101387559B (en) * | 2008-10-31 | 2010-07-14 | 湖南大学 | Laser induced plasma temperature spatial distribution detecting device and detecting method |
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| CN102607700A (en) * | 2012-03-06 | 2012-07-25 | 上海交通大学 | Device for scanning and acquiring plane dynamic arc spectrum in real time |
| CN104092418A (en) * | 2014-06-13 | 2014-10-08 | 中国科学院西安光学精密机械研究所 | Device and method for controlling stepping motor |
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