CN109342336A - A kind of real-time spectrometer system and device for deducting dark background - Google Patents
A kind of real-time spectrometer system and device for deducting dark background Download PDFInfo
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- CN109342336A CN109342336A CN201811504190.5A CN201811504190A CN109342336A CN 109342336 A CN109342336 A CN 109342336A CN 201811504190 A CN201811504190 A CN 201811504190A CN 109342336 A CN109342336 A CN 109342336A
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- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- 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
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Abstract
The invention discloses a kind of spectrometer systems for deducting dark background in real time, including light trap, motor, controller, spectrometer, temperature sensor and fiber port, described light trap one end is connected on the drive rod of the motor, and the motor connects the controller by conducting wire, the controller is connect by conducting wire with the computer.The present invention passes through to reload temperature sensor at spectrometer chip, the variation of real-time detection chip temperature, suitable temperature change threshold value is set, when temperature change is more than this threshold value, system is overturn by motor control light trap, spectrometer collection dark background spectrum simultaneously updates existing dark background spectrum, therefore, when temperature changes, dark background spectrum also and then changes, and the spectrum of spectrometer collection subtracts the dark background spectrum of update, just obtains material spectrum that is true, not varying with temperature, to realize the accurate detection of material spectrum, and then improve the accuracy of material sorting；The present invention has good social benefit, is suitble to promote the use of.
Description
Technical field
The present invention relates to a kind of spectrometer system, specially a kind of spectrometer system and device for deducting dark background in real time,
Belong to spectrometer system applied technical field.
Background technique
As color selector is in the extensive application of grain and oil industry, Chinese color selector industry development is more and more mature, kind rule
Lattice are more and more, and from the separating plastic of initial rice coarse cereals sorting till now, present spectrum is chosen from coloration, color difference, shape
Sorting, sort applications range is more and more wide, meanwhile, detection device is required higher and higher.
When sorting to materials such as plastics or fruit, the spectral information of material is identified usually using spectrometer,
Traditional fiber spectrometer is by CCD detection chip, focus lamp, collimating mirror, grating, the composition such as slit, different material spectrum
Difference can identify material by these SPECTRAL DIVERSITYs, and then sort.
The actual spectrum of material is the spectrum that the spectrum that spectrometer measures removes dark background, and dark background spectrum is in no light
In the case where the spectrum that measures of spectrometer, influencing the maximum factor of dark background spectrum is temperature, current material spectral detection side
Case is to measure dark background spectrum, the spectrum that spectrometer measures subtracts fixed dark background spectrum, just obtains before material detection
The spectrum of material, but with the operating of equipment, the variation of environment temperature, temperature can inevitably be fluctuated at spectrometer chip,
And chip noise is affected by temperature larger, dark background spectrum is certain to change at this time, if still measured with spectrometer
Spectrum subtracts fixed dark background spectrum as material spectrum, can lead to subsequent spectrum with true material spectrum difference
Processing inaccuracy, and then influence sorting accuracy.
Summary of the invention
The object of the invention is that in order to solve current material spectral detection scheme being measured before material detection
Dark background spectrum, the spectrum that spectrometer measures subtracts fixed dark background spectrum, just obtains the spectrum of material, with the fortune of equipment
Turn, the variation of environment temperature, temperature can be fluctuated at spectrometer chip, and chip noise be affected by temperature it is larger, at this time secretly
Background spectrum is certain to change, if still subtracting fixed dark background spectrum as material using the spectrum that spectrometer measures
Spectrum can lead to subsequent spectral manipulation inaccuracy, and then influence asking for sorting accuracy with true material spectrum difference
Topic, and propose a kind of spectrometer system for deducting dark background in real time, the present invention to reload temperature at spectrometer chip by detecting
Device, real-time detection chip temperature variation, is arranged suitable temperature change threshold value, when temperature change is more than this threshold value, system
Light trap overturning is controlled, spectrometer collection dark background spectrum simultaneously updates existing dark background spectrum, therefore, when temperature changes, dark to carry on the back
Scape spectrum also and then changes, and the spectrum of spectrometer collection subtracts the dark background spectrum of update, just obtains not becoming with temperature really,
The material spectrum of change to realize the accurate detection of material spectrum, and then improves the accuracy of material sorting.
The purpose of the present invention can be achieved through the following technical solutions: a kind of spectrometer system deducting dark background in real time,
Including light trap, motor, controller, spectrometer, temperature sensor and fiber port, described light trap one end is connected to the motor
On drive rod, and the motor connects the controller by conducting wire, and the controller is connect by conducting wire with the computer, and
The computer is connect by conducting wire with the spectrometer；
The spectrometer is internally provided with temperature sensor, and spectral signal biography is electrically connected with below the temperature sensor
Sensor, described spectrometer one end are connect by optical fiber with fiber port；
The motor is used to control the horizontal or vertical overturning of light trap；
The controller is used to issue signal to motor；
The computer is for receiving the temperature information that temperature sensor transmits；
The optical fiber is used for transmission in spectral signal to spectrometer；
The fiber port is for receiving spectral signal.
Further technological improvement of the invention is: the motor is flexibly connected by drive rod with light trap, and controller
It is connect by conducting wire with communications.
Further technological improvement of the invention is: the spectral signal sensor is for handling material spectral signal.
Further technological improvement of the invention is: the spectrometer is communicated to connect by optical fiber and fiber port, and electricity
Brain is communicated to connect by conducting wire and controller.
Further technological improvement of the invention is: the computer is connect by conducting wire with temperature sensor communication, temperature
Real time temperature information is transferred in computer by sensor.
Further technological improvement of the invention is: the side of fiber port, and light trap and optical fiber is arranged in the light trap
Gap is provided between port, light trap is that surface is coated with the black plastic plate or metal plate of dumb light, horizontal can be overturn vertically, horizontal
When placement, light trap is covered at fiber port, and optical fiber does not receive ambient light, it is believed that acquisition is dark background spectrum, is put vertically
When setting, optical fiber can receive ambient light.
A kind of real-time spectrometer system for deducting dark background, the working method of the system specifically includes the following steps:
Step 1: light trap is initially vertical state, and fiber port is in reception material spectral signal, the detection of computer moment
The temperature change of temperature sensor, when temperature change is more than the threshold value of setting, computer issues signal to controller, and controller is given
Motor issues instruction, and motor control light trap is turned to horizontal positioned, and what fiber port received at this time is not no material information
Spectrum is then dark background spectrum, and updates the dark background spectral signal of the internal system；
Step 2: after a spectra collection period, light trap is back turned to vertical state, and fiber port continues to object
Expect spectrum, at this point, the spectrum that the real spectrum of material is acquisition subtracts the dark background spectrum just updated, is no more than in temperature change
Before threshold value, dark background spectrum does not update, and when temperature change is more than threshold value, carries out above-mentioned steps again, dark background again by
It updates.
The beneficial effects of the present invention are: the present invention passes through to reload temperature sensor at spectrometer chip, real-time detection core
Suitable temperature change threshold value is arranged in piece temperature change, and when temperature change is more than this threshold value, system passes through motor control light trap
Overturning, spectrometer collection dark background spectrum simultaneously update existing dark background spectrum, therefore, when temperature changes, dark background spectrum
And then change, the spectrum of spectrometer collection subtracts the dark background spectrum of update, just obtains material that is true, not varying with temperature
Spectrum to realize the accurate detection of material spectrum, and then improves the accuracy of material sorting；The present invention has good society
Benefit is suitble to promote the use of.
Detailed description of the invention
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is overall structure connection schematic diagram of the present invention.
Fig. 2 is the connection side view of light trap of the present invention and motor.
Fig. 3 is overall workflow figure of the present invention.
In figure: 1, light trap；2, motor；3, controller；4, computer；5, temperature sensor；6, spectral signal sensor；7, light
Spectrometer；8, optical fiber；9, fiber port.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
It please refers to shown in Fig. 1-3, a kind of real-time spectrometer system for deducting dark background, including light trap 1, motor 2, controller
3, spectrometer 7, temperature sensor 5 and fiber port 9,1 one end of light trap are connected on the drive rod of motor 2, and motor 2 is by leading
Line connects controller 3, and controller 3 is connect by conducting wire with computer 4, and computer 4 is connect by conducting wire with spectrometer 7；
Spectrometer 7 is internally provided with temperature sensor 5, and spectral signal sensor is electrically connected with below temperature sensor 5
6,7 one end of spectrometer is connect by optical fiber 8 with fiber port 9；
Motor 2 is used to control the horizontal or vertical overturning of light trap 1；
Controller 3 is used to issue signal to motor 2；
Computer 4 is for receiving the temperature information that temperature sensor 5 transmits；
Optical fiber 8 is used for transmission in spectral signal to spectrometer 7；
Fiber port 9 is for receiving spectral signal.
As a kind of technical optimization scheme of the invention, motor 2 is flexibly connected by drive rod with light trap 1, and controller 3
It is communicated to connect by conducting wire and motor 2.
As a kind of technical optimization scheme of the invention, spectral signal sensor 6 is for handling material spectral signal.
As a kind of technical optimization scheme of the invention, spectrometer 7 is communicated to connect by optical fiber 8 and fiber port 9, and electricity
Brain 4 is communicated to connect by conducting wire and controller 3.
As a kind of technical optimization scheme of the invention, computer 4 is communicated to connect by conducting wire and temperature sensor 5, temperature
Real time temperature information is transferred in computer 4 by sensor 5.
As a kind of technical optimization scheme of the invention, the side of fiber port 9, and light trap 1 and optical fiber is arranged in light trap 1
Gap is provided between port 9, light trap 1 is that surface is coated with the black plastic plate or metal plate of dumb light, horizontal can be overturn vertically, water
When placing flat, light trap is covered at fiber port, and optical fiber does not receive ambient light, it is believed that acquisition is dark background spectrum, vertically
When placement, optical fiber can receive ambient light.
A kind of real-time spectrometer system for deducting dark background, the working method of the system specifically includes the following steps:
Step 1: light trap 1 is initially vertical state, and fiber port 9 is at reception material spectral signal, 4 moment of computer
The temperature change for detecting temperature sensor 5, when temperature change is more than the threshold value of setting, computer 4 issues signal to controller 3,
Controller 3 issues instruction to motor 2, and motor 2 controls light trap 1 and is turned to horizontal positioned, and what fiber port 9 received at this time is not have
There is the spectrum of material information, is then dark background spectrum, and update the dark background spectral signal of the internal system；
Step 2: after a spectra collection period, light trap 1 is back turned to vertical state, and fiber port 9 continues to
Material spectrum does not surpass at this point, the spectrum that the real spectrum of material is acquisition subtracts the dark background spectrum just updated in temperature change
It crosses before threshold value, dark background spectrum does not update, and when temperature change is more than threshold value, carries out above-mentioned steps again, dark background is again
It is updated.
The beneficial effects of the present invention are: the present invention passes through to reload temperature sensor 5 at 7 chip of spectrometer, real-time detection
Chip temperature variation, is arranged suitable temperature change threshold value, and when temperature change is more than this threshold value, system is controlled by motor 2
Light trap 1 is overturn, and spectrometer 7 acquires dark background spectrum and updates existing dark background spectrum, therefore, when temperature changes, dark background
Spectrum also and then changes, and the spectrum that spectrometer 7 acquires subtracts the dark background spectrum of update, just obtains not becoming with temperature really,
The material spectrum of change to realize the accurate detection of material spectrum, and then improves the accuracy of material sorting；The present invention has good
Good social benefit is suitble to promote the use of.
Working principle: in the use of the present invention, firstly, checking the safety when present invention uses, then, light trap 1 is initial
It is vertical state, in reception material spectral signal, the temperature that 4 moment of computer detects temperature sensor 5 becomes fiber port 9
Change, when temperature change is more than the threshold value of setting, computer 4 issues signal to controller 3, and controller 3 issues instruction to motor 2,
Motor 2 controls light trap 1 and is turned to horizontal positioned, and what fiber port 9 received is the spectrum of not material information at this time, herein
Then it is considered dark background spectrum, and updates the dark background spectral signal of the internal system；After a spectra collection period, light trap
1 is back turned to vertical state, and fiber port 9 continues to material spectrum, at this point, the real spectrum of material is the spectrum of acquisition
The dark background spectrum just updated is subtracted, before temperature change is no more than threshold value, dark background spectrum does not update, when temperature change is super
When crossing threshold value, above-mentioned steps are carried out again, and dark background is updated again.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, also do not limit the specific embodiment that the invention is only.Obviously, according to the content of this specification, can make
Many modifications and variations.These embodiments are chosen and specifically described to this specification, is original in order to better explain the present invention
Reason and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only authorized
The limitation of sharp claim and its full scope and equivalent.
Claims (7)
1. a kind of spectrometer device for deducting dark background in real time, it is characterised in that: including light trap (1), motor (2), controller
(3), spectrometer (7), temperature sensor (5) and fiber port (9), described light trap (1) one end are connected to the drive of the motor (2)
In lever, and the motor (2) is connected the controller (3) by conducting wire, and the controller (3) passes through conducting wire and the computer
(4) it connects, and the computer (4) is connect by conducting wire with the spectrometer (7)；
The spectrometer (7) is internally provided with temperature sensor (5), is electrically connected with spectrum below the temperature sensor (5)
Signal transducer (6), described spectrometer (7) one end are connect by optical fiber (8) with fiber port (9)；
The motor (2) is used to control the horizontal or vertical overturning of light trap (1)；
The controller (3) is used to issue signal to motor (2)；
The computer (4) is for receiving the temperature information that temperature sensor (5) transmits；
The optical fiber (8) is used for transmission in spectral signal to spectrometer (7)；
The fiber port (9) is for receiving spectral signal.
2. a kind of spectrometer system for deducting dark background in real time according to claim 1, which is characterized in that the motor
(2) it is flexibly connected by drive rod with light trap (1), and controller (3) is communicated to connect by conducting wire and motor (2).
3. a kind of spectrometer device for deducting dark background in real time according to claim 1, which is characterized in that the spectrum letter
Number sensor (6) is for handling material spectral signal.
4. a kind of spectrometer device of dark background that deducts in real time according to claim 1 is it is characterized in that, the spectrometer
(7) it is communicated to connect by optical fiber (8) and fiber port (9), and computer (4) is communicated to connect by conducting wire and controller (3).
5. a kind of spectrometer device for deducting dark background in real time according to claim 1, which is characterized in that the computer
(4) it is communicated to connect by conducting wire and temperature sensor (5).
6. a kind of spectrometer device for deducting dark background in real time according to claim 1, which is characterized in that the light trap
(1) it is arranged and is provided with gap in the side of fiber port (9), and between light trap (1) and fiber port (9).
7. a kind of spectrometer system for deducting dark background in real time, which is characterized in that the working method of the system specifically includes following
Step:
Step 1: light trap (1) is initially vertical state, and fiber port (9) is in reception material spectral signal, computer (4)
The temperature change for carving detection temperature sensor (5), when temperature change is more than the threshold value of setting, computer (4) is sent out to controller (3)
Signal out, controller (3) issue instruction to motor (2), and motor (2) control light trap (1) is turned to horizontal positioned, optical fiber end at this time
What mouth (9) received is the spectrum of not material information, then is dark background spectrum, and update the dark background spectrum of the internal system
Signal；
Step 2: after a spectra collection period, light trap (1) is back turned to vertical state, and fiber port (9) continues to
Material spectrum does not surpass at this point, the spectrum that the real spectrum of material is acquisition subtracts the dark background spectrum just updated in temperature change
It crosses before threshold value, dark background spectrum does not update, and when temperature change is more than threshold value, carries out above-mentioned steps again, dark background is again
It is updated.
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| CN201811504190.5A CN109342336B (en) | 2018-12-10 | 2018-12-10 | Spectrometer system and device for deducting dark background in real time |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112284535A (en) * | 2020-09-15 | 2021-01-29 | 中国科学院上海技术物理研究所 | Dark background removing method for progressive on-orbit push-scan type medium-short wave infrared imaging spectrometer |
| CN113552084A (en) * | 2021-07-29 | 2021-10-26 | 深圳市先亚生物科技有限公司 | System, method and device for eliminating interference of spectrum detection background signal |
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