CN206114518U - Fruit maturity nondestructive detection system based on infrared light reputation register for easy reference - Google Patents
Fruit maturity nondestructive detection system based on infrared light reputation register for easy reference Download PDFInfo
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- CN206114518U CN206114518U CN201621112762.1U CN201621112762U CN206114518U CN 206114518 U CN206114518 U CN 206114518U CN 201621112762 U CN201621112762 U CN 201621112762U CN 206114518 U CN206114518 U CN 206114518U
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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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
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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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
- G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The utility model relates to a fruit maturity detection area, concretely relates to fruit maturity nondestructive detection system based on infrared light reputation register for easy reference and method. The utility model discloses aim at solving the problem of the interference of light scattering among the near infrared spectroscopy detection method, reflection, improved the detection precision. The utility model discloses detecting system includes laser emission subassembly, optoacoustic detection subassembly and signal processing subassembly, the laser emission subassembly includes laser signal modulating device, laser controller and infrared laser, the optoacoustic is surveyed the subassembly and is included the spectrometer, is referred to optoacoustic pond, sample photoacoustic cell and optoacoustic detector, the signal processing subassembly includes microcontroller, preamplifier and lock -in amplifier. The beneficial effects of the utility model reside in that the ethylene gas that utilizes infrared laser optoacoustic spectral detection fruit release determines fruit quality, determines the maturity of fruit according to fruit release ethylene gas's content, avoid the interference of light scattering among the near infrared spectroscopy detection method, reflection, improved the detection precision.
Description
Technical field
This utility model is related to fruit maturity detection field, and in particular to a kind of fruit based on infrared photoacoustic spectra into
Ripe degree nondestructive detection system.
Background technology
The Maturity of fruit is one of topmost quality of fruit, and the detection of the Maturity of fruit can determine that fruit is ripe
Degree grade, can be according to the fruit maturity hierarchical selection suitable fruit picking time of detection, and then it is follow-up to contribute to fruit
Extend the shelf life of fruit in processing, process and transportation, the loss for preventing fruit nutrition composition has influence on fruit quality, keeps away
Exempt to cause unnecessary economic loss during storage and sale.
Although near-infrared spectrum technique has the application of correlation in fruit maturation detection technique, due to light and tissue phase
Interaction process is necessarily accompanied with certain reflection, scattering and other light loss, hence in so that light in the tissue penetrate depth
Degree is limited, is also limited so as to cause the useful information entrained by the light for detecting, and current these technical barriers are not yet solved,
Thus such detection method is difficult to obtain accurately and reliably testing result.
The content of the invention
The problem to be solved in the present invention there is provided a kind of fruit maturity Non-Destructive Testing system based on infrared photoacoustic spectra
System, it can avoid light scattering near infrared spectrum detection method, the interference of reflection, substantially increase accuracy of detection, and energy can
The ethylene gas concentration of the online fruit release of detection in real time, determines the optimum collecting time of fruit, is processing, the transport of fruit
Reliable technological means are provided with storage.
To solve above-mentioned technical problem, this utility model is adopted the following technical scheme that：
A kind of fruit maturity nondestructive detection system based on infrared photoacoustic spectra of design, including Laser emission component, light
Acoustic detection component and signal processing component；The Laser emission component include be corresponding in turn to connection laser signal modulating device,
Laser controller and infrared laser；The optoacoustic detection component includes being arranged in the infrared laser Laser emission light path
Beam splitter, and be separately positioned on the reference photoacoustic cell and sample photoacoustic cell of two separate optical line terminals of the beam splitter,
Optoacoustic detector is respectively arranged with the reference photoacoustic cell and sample photoacoustic cell, is provided with the reference photoacoustic cell side
Coupled logical sample apparatus for placing；The signal processing component includes that microcontroller is corresponding with the optoacoustic detector and connects
The preamplifier for connecing and the lock-in amplifier of connection corresponding with the preamplifier, the lock-in amplifier is by number
It is connected with the microcontroller according to capture card.
Preferably, the optoacoustic detection component also includes optical fiber collimator, and the optical fiber collimator is arranged at beam splitter point
In two light paths opened.
Preferably, the infrared laser is 10.5 μm of QCL, and the laser signal modulating device is
Waveform generator.
Preferably, the infrared laser is 10.5 μm of CO2 laser instrument, and the laser signal modulating device is copped wave
Device.
Preferably, the optoacoustic detector is mike or quartz tuning-fork.
Preferably, beam splitter is Y types bifurcation fiber or plane beam splitter.
Preferably, the preamplifier is low-noise current amplifier.
Preferably, the microcontroller includes liquid crystal display.
Design is a kind of to carry out fruit maturation using the fruit maturity nondestructive detection system based on infrared photoacoustic spectra
The method of degree Non-Destructive Testing, comprises the steps：
（1）Testing sample is positioned in sample apparatus for placing first；Then wavelength modulation spectrum technology is utilized, by laser
The signal that modulating apparatus are generated is added on laser controller, and the infrared laser for being driven using laser controller and being controlled is sent out
Go out the laser of wavelength modulation；
（2）Step（1）Described in the laser device that is split of infrared laser transmitting be divided into the beam of luminous power identical two, two beams
The end of light is collimated respectively by optical fiber collimator, wherein a branch of by reference to photoacoustic cell, this is with reference to gas in photoacoustic cell
Body is air, and the light path is reference path；Another beam is connected by sample photoacoustic cell, the sample photoacoustic cell with sample apparatus for placing
Logical, sample optoacoustic pool gas are the ethylene that air and testing sample are discharged, and the beam optical path is optical path；
（3）Signal with reference to obtained by the optoacoustic detector detection in photoacoustic cell and sample photoacoustic cell is preposition respectively through one
Amplifier is amplified, and then by lock-in amplifier obtains second harmonic signal again, will finally by high-speed data acquisition card
The two-way second harmonic signal of gained is transferred to microcontroller；
（4）The two paths of signals for being collected is carried out microcontroller into ratio or difference is processed, and calculates the secondary humorous of collection
Ripple signal and the relation of fruit releasing ethylene gas, the Maturity grade of fruit is determined according to the concentration of ethylene gas, and is led to
Cross liquid crystal display output result.
Preferably, the infrared laser is 10.5 μm of QCL, and the laser signal modulating device is
Waveform generator, the laser controller includes temperature control unit and current control unit, and waveform generator is low by what is generated
The triangular signal of frequency and the sine wave signal of high frequency are added in current control circuit, and the laser to sending carries out wavelength tune
System.
Preferably, in the step（2）In, the beam splitter is Y types bifurcation fiber or plane beam splitter.
Preferably, in the step（3）In, the optoacoustic detector is mike, with reference to photoacoustic cell and sample photoacoustic cell
In be respectively arranged with resonator cavity, mike is close to the centre position of resonator cavity.
Preferably, in the step（3）In, the optoacoustic detector is quartz tuning-fork, with reference to photoacoustic cell and sample optoacoustic
Miniature resonance capillary tube is respectively arranged with pond, miniature resonance capillary tube is fixed on the both sides of tuning fork.
Advantageous Effects of the present utility model are：
1. judge fruit quality using the ethylene gas of infrared photoacoustic spectra detection fruit release, second is discharged according to fruit
The content of alkene gas is judging the Maturity of fruit.Light scattering near infrared spectrum detection method, the interference of reflection are avoided, is improved
Accuracy of detection.
2. the Maturity grade of fruit both can be determined by ethylene gas content that real-time detection fruit discharges, and not
The interior tissue of fruit can be destroyed, there is preferable repeatability, fruit can be determined with the ethylene gas discharged according to fruit and deposited
Storage, processing and traffic condition.
3 can avoid light scattering near infrared spectrum detection method, the interference of reflection, substantially increase accuracy of detection, and
The ethylene gas concentration that fruit discharges can be in real time detected online, determine the optimum collecting time of fruit.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the graph of a relation of optoacoustic second harmonic signal and ethylene gas concentration；
Wherein, 1 is infrared laser, and 2 is laser controller, and 3 is laser signal modulating device, and 4 is beam splitter, and 5 is light
Fine collimator, 6 is to refer to photoacoustic cell, and 7 is sample photoacoustic cell, and 8 is sample apparatus for placing, and 9 is sample, and 10 is optoacoustic detector,
11 is preamplifier, and 12 is lock-in amplifier, and 13 is microcontroller.
Specific embodiment
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawings and examples, but with
Lower embodiment is used only to describe this utility model in detail, and limits scope of the present utility model never in any form.To implement
Involved equipment or material, are then if no special instructions conventional equipment or material in example；Involved method and step for example without
Special instruction is then common process steps.
Embodiment 1：A kind of fruit maturity nondestructive detection system based on Infrared Laser Photoacoustic Spectra, as shown in figure 1, bag
Include Laser emission component, optoacoustic detection component and signal processing component；Laser emission component includes being corresponding in turn to the laser of connection
Modulating apparatus 3, laser controller 2 and infrared laser 1.Optoacoustic detection component include beam splitter 4, optical fiber collimator 5,
With reference to photoacoustic cell 6, sample photoacoustic cell 7, sample apparatus for placing 8 and optoacoustic detector 10；Beam splitter 4 is arranged at 10.5 μm red
On the laser optical path that outer laser instrument sends, laser is divided into into luminous power identical two-beam road；Optical fiber collimator 5 is respectively arranged at
In two light paths, for outgoing beam to be collimated；Beam splitter 4 is respectively arranged at reference to photoacoustic cell 6 and sample photoacoustic cell 7 to separate
The end of two light paths, the side of sample apparatus for placing 8 is provided with the sample photoacoustic cell 7 for corresponding to connection therewith；10 points of optoacoustic detector
Do not arrange in reference to photoacoustic cell 6 and sample photoacoustic cell 7.Signal processing component includes microcontroller 13 and optoacoustic detection respectively
The preamplifier 11 of the correspondence connection of device 10 and the lock-in amplifier 12 of connection corresponding with preamplifier 11；Lock mutually amplifies
Device 12 is connected by data collecting card with microcontroller 13.
Infrared laser 1 is QCL, and laser signal modulating device 3 is waveform generator, and 10.5um's is red
Outer laser instrument 1 is driven by laser controller 2, is folded the signal that waveform generator is generated using wavelength modulation spectrum technology
It is added to the infrared laser for driving and controlling 10.5 μm on the current control circuit of laser controller 2 using laser controller 2
Go out the laser of wavelength modulation.Beam splitter 4 is Y type bifurcation fibers.Optoacoustic detector 10 is mike, with reference to photoacoustic cell 6 and sample
Resonator cavity is provided with photoacoustic cell 7, mike is close to the centre position of resonator cavity.Lock-in amplifier 12 passes through data collecting card
It is connected with microcontroller 12.
Embodiment 2：It is a kind of ripe using the fruit maturity nondestructive detection system detection fruit based on infrared photoacoustic spectra
The lossless detection method of degree, comprises the steps：
（1）Testing sample is positioned in sample apparatus for placing first；Then wavelength modulation spectrum technology is utilized, by laser
The signal that modulating apparatus 3 are generated is added on laser controller 2, and 10.5 μm red is driven and controlled using laser controller 2
Outer laser instrument sends the laser of wavelength modulation；10.5 μm of infrared lasers 1 are QCL, and laser signal modulation is filled
3 are put for waveform generator, laser controller 2 includes temperature control unit and current control unit, waveform generator will be generated
The triangular signal of low frequency and the sine wave signal of high frequency are added in current controller, and the laser to sending carries out wavelength tune
System.Laser controller the driving current and temperature of laser instrument are controlled using stable current circuit and temperature-compensation circuit come
The laser output of control specific wavelength and stablizing for guarantee output laser；
（2）Step（1）Described in be split 4 points of the device of laser of infrared laser transmitting be the beam of luminous power identical two, two
The end of beam light is collimated respectively by optical fiber collimator 5, wherein a branch of by reference to photoacoustic cell 6, this refers to photoacoustic cell 6
Interior gas is air, and the light path is reference path；Another beam places dress by sample photoacoustic cell 7, the sample photoacoustic cell 7 with sample
Put 8 to be connected, gas is the ethylene that air and sample 9 are discharged in sample photoacoustic cell 7, the beam optical path is optical path；Point
Light device 4 is plane beam splitter；
（3）With reference to optoacoustic detector 10 is placed with photoacoustic cell 6 and sample photoacoustic cell 7 respectively, two optoacoustic detector 10 will
Signal obtained by measurement is amplified respectively by a preamplifier 11, and the signal after amplification passes through lock-in amplifier
12 obtain second harmonic signal, improve detectivity and signal to noise ratio, finally by high-speed data acquisition card that two-way is secondary humorous
Ripple signal transmission gives the microcontroller 13 with liquid crystal display；Optoacoustic detector 10 is quartz tuning-fork, with reference to photoacoustic cell 6 and sample
Miniature resonance capillary tube is respectively arranged with photoacoustic cell 7, miniature resonance capillary tube is fixed on the both sides of tuning fork；
（4）The two paths of signals for being collected is carried out microcontroller 13 into ratio or difference is processed, and calculates the secondary of collection
The relation of harmonic signal and fruit releasing ethylene gas, wherein second harmonic signal are that the secondary derivation of optoacoustic detection signal is maximum
Value, as shown in Fig. 2 determine the Maturity grade of fruit according to the concentration of ethylene gas, and by liquid crystal display output at
Reason result.
This utility model is described in detail above in conjunction with drawings and Examples, but, the skill of art
Art personnel, can also be concrete to each in above-described embodiment it is understood that on the premise of without departing from this utility model objective
Parameter is changed, and forms multiple specific embodiments, is common excursion of the present utility model, and here is no longer detailed one by one
State.
Claims (8)
1. a kind of fruit maturity nondestructive detection system based on infrared photoacoustic spectra, it is characterized by：Including Laser emission component,
Optoacoustic detection component and signal processing component；The Laser emission component includes being corresponding in turn to the laser signal modulation dress of connection
Put, laser controller and infrared laser；The optoacoustic detection component includes being arranged at the infrared laser Laser emission light
Beam splitter on road, and it is separately positioned on the reference photoacoustic cell and sample optoacoustic of two separate optical line terminals of the beam splitter
Pond, in the reference photoacoustic cell and sample photoacoustic cell optoacoustic detector is respectively arranged with, and is set in the reference photoacoustic cell side
It is equipped with coupled logical sample apparatus for placing；The signal processing component includes microcontroller and the optoacoustic detector pair
The preamplifier that should connect and the lock-in amplifier of connection corresponding with the preamplifier, the lock-in amplifier leads to
Cross data collecting card to be connected with the microcontroller.
2. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
Stating optoacoustic detection component also includes optical fiber collimator, and the optical fiber collimator is arranged in two separate light paths of beam splitter.
3. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
The QCL that infrared laser is 10.5 μm is stated, the laser signal modulating device is waveform generator.
4. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
The CO2 laser instrument that infrared laser is 10.5 μm is stated, the laser signal modulating device is chopper.
5. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
Optoacoustic detector is stated for mike or quartz tuning-fork.
6. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
Beam splitter is stated for Y types bifurcation fiber or plane beam splitter.
7. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
Preamplifier is stated for low-noise current amplifier.
8. the fruit maturity nondestructive detection system based on infrared photoacoustic spectra according to claim 1, it is characterized by, institute
Microcontroller is stated including liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621112762.1U CN206114518U (en) | 2016-10-11 | 2016-10-11 | Fruit maturity nondestructive detection system based on infrared light reputation register for easy reference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621112762.1U CN206114518U (en) | 2016-10-11 | 2016-10-11 | Fruit maturity nondestructive detection system based on infrared light reputation register for easy reference |
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| CN206114518U true CN206114518U (en) | 2017-04-19 |
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| CN201621112762.1U Expired - Fee Related CN206114518U (en) | 2016-10-11 | 2016-10-11 | Fruit maturity nondestructive detection system based on infrared light reputation register for easy reference |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290220A (en) * | 2016-10-11 | 2017-01-04 | 河南农业大学 | Fruit maturity nondestructive detection system based on infrared photoacoustic spectra and method |
| CN109297908A (en) * | 2018-12-05 | 2019-02-01 | 泰安市康宇医疗器械有限公司 | A kind of microelement infrared spectra measuring system |
| CN110376263A (en) * | 2019-06-17 | 2019-10-25 | 贾晨晓 | It is a kind of for detecting the detection device and its method of fruit maturation |
| WO2019240582A1 (en) * | 2018-06-15 | 2019-12-19 | Stichting Katholieke Universiteit | Storage control system comprising a supercontinuum laser source |
| RU2817527C1 (en) * | 2023-12-21 | 2024-04-16 | федеральное государственное автономное образовательное учреждение высшего образования "Московский физико-технический институт (национальный исследовательский университет)" | Method and device for monitoring electrodynamic characteristics in microwave range |
-
2016
- 2016-10-11 CN CN201621112762.1U patent/CN206114518U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290220A (en) * | 2016-10-11 | 2017-01-04 | 河南农业大学 | Fruit maturity nondestructive detection system based on infrared photoacoustic spectra and method |
| WO2019240582A1 (en) * | 2018-06-15 | 2019-12-19 | Stichting Katholieke Universiteit | Storage control system comprising a supercontinuum laser source |
| CN109297908A (en) * | 2018-12-05 | 2019-02-01 | 泰安市康宇医疗器械有限公司 | A kind of microelement infrared spectra measuring system |
| CN110376263A (en) * | 2019-06-17 | 2019-10-25 | 贾晨晓 | It is a kind of for detecting the detection device and its method of fruit maturation |
| RU2817527C1 (en) * | 2023-12-21 | 2024-04-16 | федеральное государственное автономное образовательное учреждение высшего образования "Московский физико-технический институт (национальный исследовательский университет)" | Method and device for monitoring electrodynamic characteristics in microwave range |
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Granted publication date: 20170419 Termination date: 20201011 |