CN104374706B - Carnis caprae seu ovis freshness detection device and its detection method - Google Patents
Carnis caprae seu ovis freshness detection device and its detection method Download PDFInfo
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- CN104374706B CN104374706B CN201410405054.6A CN201410405054A CN104374706B CN 104374706 B CN104374706 B CN 104374706B CN 201410405054 A CN201410405054 A CN 201410405054A CN 104374706 B CN104374706 B CN 104374706B
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Abstract
The invention discloses a kind of Carnis caprae seu ovis freshness detection device and its detection method, including light tight housing, laser array, spectrogrph, light intensity adjusting means, the container of the upper end open in housing, support, the circular sample pallet in container, on support for the light-receiving head to the light emitting head of sample irradiation light and for receiving the reflected light of sample；Light intensity adjusting means, laser array, light emitting head are sequentially connected electrically, and light-receiving head is electrically connected with spectrogrph；Container and sample tray are made by non-magnet_conductible material, and liquid is provided with the container, and the sample tray is suspended on liquid surface, and container bottom is provided with center vertical core and the m edge vertical core circumferentially arranged around center vertical core；The present invention has detection speed fast；Test point is more, the characteristics of the reliability and higher precision of detection data.
Description
Technical field
The present invention relates to measurement techniques for quality detection of meat detection technique field, can accurately and rapidly detect sheep more particularly, to one kind
The whether corrupt Carnis caprae seu ovis freshness detection device of meat and its detection method.
Background technology
The characteristics of Carnis caprae seu ovis have nutritious and in good taste, it is deep to be liked by consumers in general.
But, Carnis caprae seu ovis are highly susceptible to pollute and go bad.During storage, with the propagation of microorganism and a series of
Physicochemical change, the freshness of Carnis caprae seu ovis are decreased.The abundant nutritional labeling quilt such as protein, fat and carbohydrate
Antibacterial and enzyme are utilized, and produce the sour gas of ammonia, sulfuration ammonia, aldehydic acid, aldehyde, ketone, ethanethio, alcohol and carboxylic acid.Metabolite
In aldehyde, ketone, ester and other low molecular compounds make Carnis caprae seu ovis produce abnormal flavour.
At present, sample is irradiated (i.e. using a normally opened laser instrument battle array using spectrum stimulus light source generally both at home and abroad
Row or LED are impinged upon on sample), and gather incident illumination and be mapped to diffusing or through the reflection of sample after sample
Light, is analyzed to diffusing reflection spectrum or reflectance spectrum, finally realizes the detection to sample quality；But, the detection method
Have that collected detection information amount is less, the relatively low deficiency of the precision of detection.
Chinese patent Authorization Notice No.：CN101769889A, in authorized announcement date on July 7th, 2010, discloses a kind of agricultural production
The electric nasus system of product Quality Detection, including one mainly complete the gas enrichment module to low concentration odor trap, a main handle
Olfactory signal is converted into the air chamber gas path module and sensor array of the signal of telecommunication, and one is mainly carried out to sensor array output signal
Filtering, analog digital conversion, the Conditioning Circuits of Sensor of feature extraction and data preprocessing module, a pair of signals are identified and sentence
Disconnected, and the embedded system with data storage, one shows and result output module；Described gas enrichment module is by loading
Adsorption tube, heating wire and the attemperating unit for having adsorbent is constituted.The invention has single function, the deficiency of detection time length.
The content of the invention
The present invention is to overcome the shortcomings of that detection method precision of the prior art is low and time-consuming, there is provided Yi Zhongke
Accurately and rapidly to detect the whether corrupt Carnis caprae seu ovis freshness detection device of Carnis caprae seu ovis and its detection method.
To achieve these goals, the present invention is employed the following technical solutions：
A kind of Carnis caprae seu ovis freshness detection device, including light tight housing, laser array, spectrogrph, light intensity adjust dress
Put, the container of the upper end open in housing, support, the circular sample pallet in container, being used on support
Light-receiving head to the light emitting head of sample irradiation light and for receiving the reflected light of sample；Light intensity adjusting means, laser instrument
Array, light emitting head are sequentially connected electrically, and light-receiving head is electrically connected with spectrogrph；Container and sample tray are by non-magnet_conductible material system
Into, liquid is provided with the container, the sample tray is suspended on liquid surface, and container bottom is provided with center vertical core and m
Positioning electromagnetism is equipped with the edge vertical core that center vertical core is circumferentially arranged, the equal upward opening of each vertical core and vertical core
Ferrum, it is interior in the middle part of the sample tray to be provided with positioning magnet piece, through upper end and the positioning of the metal column of sample tray lower surface
It is connected with magnet piece, positioning electric magnet and positioning are contrary with the pole polarity of magnet piece opposite end；
Sample tray outward flange is provided with some traction magnet pieces to the distribution that is centrosymmetric, container inside face top
It is provided with some power for traction Magnet to being centrosymmetric being engaged with traction magnet piece；Light intensity adjusting means, spectrum
It is equipped with instrument, each block of positioning electric magnet and each block of power for traction Magnet for the signaling interface with calculating mechatronics.
The light intensity adjusting means of the present invention is used for the light intensity for adjusting the light source that laser array sends, and each positioning is used
For positioning to sample tray, power for traction Magnet is used to draw sample tray movement electric magnet, and liquid is provided for sample
Product pallet is provided and departs from the buoyancy being located by connecting with container, so that the present invention can be detected to the multiple points on sample,
And carry out data analysiss to the detection signal that each point of irradiation is obtained, and the freshness of meat samples is obtained, the scope of detection is more
Extensively, detection information more comprehensively, improves the reliability of testing result.
The principle of Carnis caprae seu ovis freshness is learned in light detection：After a branch of light irradiation sample, due to institute in different freshness samples
Comprising different chemical feature groups be it is different, therefore for the degree of absorption of different wave length incident illumination be it is different, because
And in reflected light the intensity of each wavelength light be it is different, therefore can according to these information go characterize sample freshness.But,
If the light intensity of incident illumination is fixed, incident illumination is stably radiated on sample, and each chemical group in sample is not for
The degree of absorption of co-wavelength light is in saturation, although can be detected information, but quantity of information does not enrich, detection
It is accurately fixed relatively low.
The present invention is the incident illumination irradiating sample being continually changing using light intensity, gradually greatly or is reduced in the intensity of incident illumination
Change procedure in, absorption of the different groups to respective wavelength light is gradually big or reduces, now at the degree of absorption of group
During unsaturation, saturation diminuendo, more detection informations are included in transmitted light, so as to enable the detection signal for obtaining more
The freshness of Carnis caprae seu ovis is symbolized accurately.
Therefore, the present invention has detection speed fast, and test point is more, and the reliability and precision of detection data is higher.
Preferably, be equipped with motor in container below each vertical core, each positioning electric magnet respectively with each electricity
The vertical rotating shaft of machine is connected, and is equipped with keeper on each positioning electric magnet, and each keeper upper end offers cross
Groove, metal column lower end are provided with the cross projection corresponding with cross groove；Each motor be provided with for computer
The signaling interface of electrical connection.Metal column is provided with spring, and keeper is made using metal material.
Preferably, the laser array includes that 6 bundle and Single wavelength laser that wavelength is arranged in order
Device, the wavelength of each single wavelength laser are respectively 585nm, 920nm, 512nm, 816nm, 670nm and 720nm.For Carnis caprae seu ovis
Physicochemical property, select more than the laser instrument of 6 wavelength detected, more can project the detection feature of Carnis caprae seu ovis, improve and examine
The accuracy of survey.
Preferably, the light intensity adjusting means includes data collecting card and power amplifier, the data collecting card
It is provided with for the signal input interface with calculating mechatronics, the data collecting card is electrically connected with the input of power amplifier
Connect, the outfan of the power amplifier and the power electric connection of laser array.
Computer is produced for controlling the waveform of intensity variation, and the waveshape signal is gathered by data collecting card, and is exported
To on power amplifier, the outfan of power amplifier and the power electric connection of laser array, so as to pass through to control laser instrument
The power supply of array realizes the regulation of the light intensity of the light source sent to laser array, and strong to sample irradiation by light emitting head
The incident illumination of degree change.
Preferably, support is L-shaped, including flat board and column；Light emitting head and light-receiving head pass through montant respectively and put down
Plate is connected；, in bar shaped, the pole polarity on the outside of each piece of traction magnet piece is identical for each piece of traction magnet piece.
A kind of detection method of Carnis caprae seu ovis freshness detection device, comprises the steps：
(6-3-1) positioning in computer controlling center vertical core is powered with electric magnet, in the suction of positioning electric magnet
Under effect, in metal column insertion center vertical core, serial number i of edge vertical core is set, the initial value of i=1 ..., m, i is 1；
(6-3-2) computer adjusts light emitting head by light intensity adjusting means and exports detection light, and the detection light is pressed from 0
Directly line rises to maximum MAT, then drops to 0 according to sine curve from maximum MAT；Spectrogrph is received and detection light
Corresponding detection signal Spect (t)；
(6-3-3) the positioning electric magnet power-off in computer controlling center vertical core, the positioning controlled in edge vertical core i are used
Electric magnet is powered, and computer controls line is powered through two power for traction Magnet of edge vertical core i, 2 blocks of power for traction Magnet
Sample tray is driven to move on liquid level with the captivation produced by each piece of traction magnet piece and repulsive force, when being moved to edge
When at vertical core i, metal column is inserted in edge vertical core i in the presence of captivation, and computer controls line is through edge vertical core i's
Two power for traction Magnet power-off, repeat step (6-3-2)；
Positioning in computer controlling center vertical core is powered with electric magnet, and the positioning in computer controls edge vertical core i is used
Electric magnet power-off, controls line and is powered through two power for traction Magnet of edge vertical core i, 2 blocks of power for traction Magnet with each piece
Captivation and repulsive force produced by traction magnet piece drives sample tray to move on liquid level, and sample tray is moved to center
Vertical core and metal column is inserted in the vertical core of center in the presence of captivation；
(6-3-4) as i ＜ m, i values are made to increase 1, repeat step (6-3-3)；
Obtain m+1 detection signal Spect (t)；
(6-4) computer does following data processing to m+1 detection signal Spect (t)：
Detection signal Spect (t) is input into into one layer of accidental resonance model：
In, computer calculates V (x, t, α) for the first derivative of x (t), second dervative and three order derivatives, and makes equation
Equal to 0, two layers of accidental resonance model are obtained：
Setting noise intensity D=0,Spect (t)=0, N (t)=0；It is calculated the marginal value of A
ForThe marginal value of A is substituted in one layer of accidental resonance model, and sets X0(t)=0, sn0=0, with quadravalence jade for asking rain lattice
Storehouse tower one layer of accidental resonance model of Algorithm for Solving, obtains
Wherein undetermined coefficient：
(k1)n=a (α xn-1(t))2-b(αxn-1(t))3+snn-1
Wherein, xnThe n order derivatives of (t) for x (t), snn-1It is value of the n-1 order derivatives of S (t) at t=0, Snn+1It is S
Value of the n+1 order derivatives of (t) at t=0, n=0,1 ..., N-1；Obtain x1(t), x2(t) ..., xn+1The value of (t)；
Computer is to x1(t), x2(t) ..., xn+1T () is integrated, obtain x (t), and it is random common at one layer to obtain x (t)
Shake model and two layers of accidental resonance model composition the double-deck stochastic system generation accidental resonance moment time at optimal detection moment
T1, optimum transient motion acceleration alpha 1, and determine the noise D1 corresponding to t1 and α 1：
Computer utilizes formulaCalculate the letter of double-deck stochastic resonance system output
Make an uproar ratio；Wherein, Δ U=a2/4b；Obtain m+1 output signal-to-noise ratio SNR1, SNR2..., SNRm+1；
(6-5) computer utilizes formulaCalculate kth group pivoting angle data institute right
Output signal-to-noise ratio error QE answeredk, wherein, k=1 ..., m+1；
Computer is calculated and meets QEkNumber M of≤5% output signal-to-noise ratio error1；Computer is calculated and meets QEk＞ 5%
Output signal-to-noise ratio error number M2；
If (6-6)Then computer makes the fresh judgement of sample；
IfThen computer makes the stale judgement of sample；
Otherwise, return to step (6-3-1), detects to sample again and carries out data processing.
Preferably, be equipped with motor in container below described each vertical core, each positioning electric magnet respectively with respectively
The vertical rotating shaft of individual motor is connected, and is equipped with keeper on each positioning electric magnet, and each keeper upper end offers
Cross groove, metal column lower end are provided with the cross projection corresponding with cross groove, each motor be provided with for
Calculate the signaling interface of mechatronics；
Step (6-3-2) is replaced by following step：
Computer adjusts light emitting head by light intensity adjusting means and exports detection light, and the detection light is from 0 according to straight line
Maximum MAT is risen to, then 0 is dropped to according to sine curve from maximum MAT；In detection process, computer controls with
The rotating shaft of the corresponding motor of vertical core that metal column is inserted drives that sample tray rotation 1 to 2 is all, and spectrogrph is received and detection
Corresponding detection signal Spect (t) of light.
Preferably, the thickness of the lamellar meat is 31 to 73mm.
Preferably, the incident angle of light emitting head is 15 to 60 degree.
Preferably, the span of MAT be 108 luxs to 207 luxs.
Therefore, the present invention has the advantages that：(1) detection speed is fast；(2) test point is more, detection data can
It is higher by property and precision.
Description of the drawings
Fig. 1 is a kind of structural representation of the container and support of the present invention；
Fig. 2 is a kind of structural representation of the sample tray of the present invention；
Fig. 3 is a kind of structural representation of metal column, vertical core, motor, positioning electric magnet and the keeper of the present invention；
Fig. 4 is a kind of theory diagram of embodiments of the invention 1；
Fig. 5 is the Strength Changes schematic diagram of the detection light of the present invention；
Fig. 6 is a kind of flow chart of embodiments of the invention 1.
In figure：Spectrogrph 1, light intensity adjusting means 2, container 3, sample tray 4, support 5, light emitting head 6, light-receiving head
7th, vertical core 8, positioning electric magnet 9, metal column 11, power for traction Magnet 13, motor 14, keeper 15, cross groove 16, ten
Font projection 17, data collecting card 18, power amplifier 19, laser array 20, Housing Base 21, cushion pad 22, spring 23,
Computer 24.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1, Figure 2, Figure 3, Figure 4 is a kind of Carnis caprae seu ovis freshness detection device, including light tight housing,
Laser array 20, spectrogrph 1, light intensity adjusting means 2, as shown in figure 1, the appearance of the upper end open on Housing Base 21
Device 3, support 5, the circular sample pallet 4 in container, on support for 6 He of light emitting head to sample irradiation light
For receiving the light-receiving head 7 of the reflected light of sample；Light intensity adjusting means, laser array, light emitting head are sequentially connected electrically,
Light-receiving head is electrically connected with spectrogrph；Container and sample tray are made by wood materials, and water is provided with container, and sample tray hangs
Float in water surface, container bottom is provided with center vertical core and 8 edge vertical cores circumferentially arranged around center vertical core, each
Positioning electric magnet 9 is equipped with 8 equal upward opening of vertical core and vertical core, it is interior in the middle part of sample tray to be provided with positioning magnet piece,
Upper end through the metal column 11 of sample tray lower surface is connected with magnet piece with positioning, positioning electric magnet and positioning magnetic
The pole polarity of iron block opposite end is contrary；
As shown in Fig. 2 sample tray outward flange is provided with 22,8 traction magnetic of cushion pad of 4 pairs of distributions that are centrosymmetric
Iron block is located in each cushion pad respectively, and container inside face top is provided with being centrosymmetric of being engaged with traction magnet piece
5 pairs of power for traction Magnet 13；On light intensity adjusting means, spectrogrph, each block of positioning electric magnet and each block of power for traction Magnet
It is equipped with the signaling interface for electrically connecting with computer 24.
Laser array includes that 6 bundle and single wavelength laser that wavelength is arranged in order, each Single wavelength
The wavelength of laser instrument is respectively 635nm, 980nm, 532nm, 808nm, 660nm and 780nm.
Light intensity adjusting means includes data collecting card 18 and power amplifier 19, and data collecting card is provided with by with based on
Calculate the signal input interface of mechatronics, data collecting card electrically connected with the input of power amplifier, power amplifier it is defeated
Go out the power electric connection at end and laser array.
Support is L-shaped, including flat board and column；Light emitting head and light-receiving head are connected with flat board by montant respectively；
, in bar shaped, the pole polarity on the outside of each piece of traction magnet piece is identical for each piece of traction magnet piece.
As shown in Fig. 2 light intensity adjusting means includes N1-6259 data collecting cards 20 and power amplifier 21, data are adopted
Truck is provided with for the signal input interface with calculating mechatronics, and data collecting card is electrically connected with the input of power amplifier
Connect, the outfan of power amplifier and the power electric connection of laser array.Motor is motor.
A kind of detection method of Carnis caprae seu ovis freshness detection device, comprises the steps：
According to CNS GB/T 5009.44-2003, the volatile salts of the different resting period meat samples of detection
Base nitrogen TVB-N values, and obtain freshness threshold SNR corresponding with 9 sample detection point differencethre1, SNRthre2...,
SNRthre9；
According to CNS GB/T 5009.44-2003, the volatile salts of the different resting period meat samples of detection
Base nitrogen TVB-N values, and obtain freshness threshold SNR corresponding with 8 sample detection point differencethre1=-86.21dB, SNRthre2
=-75.32dB, SNRthre3=-69.25dB, SNRthre4=-62.34dB, SNRthre5=-53.28dB, SNRthre6=-
49.37dB, SNRthre7=-44.64dB, SNRthre8=-34.59dB, SNRthre9=-28.42dB；
Freshness threshold SNRthre1, SNRthre2..., SNRthre9The method of acquisition is as follows：
The total volatile basic nitrogen numerical value of the new fresh mutton that detection has just been slaughtered, after having detected is put into Carnis caprae seu ovis in cold storage plant and deposits
Storage, second day, takes out the total volatile basic nitrogen numerical value that Carnis caprae seu ovis continue detection Carnis caprae seu ovis in the 3rd day ... ..., has detected every time and be put into
Store in cold storage plant, when the total volatile basic nitrogen numerical value of certain day sample is exceeded for the first time, then the sample of this day is adopted into following
Step is detected that 9 for obtaining SNR is freshness threshold SNRthre1, SNRthre2..., SNRthre9。
Freshness threshold is related to storage condition, and the meat samples to storing in certain temperature, pressure and humidity are entered
Freshness threshold SNR obtained by row detectionthre1, SNRthre2..., SNRthre9, it is only used for detection and stores under the same conditions
Carnis caprae seu ovis freshness.
Before detection, the height of water level in container is adjusted, make the reflected light of light emitting head transmitting can be with Jing after sample reflection
Just enter in light-receiving head；
As shown in fig. 6, step 100, sample preparation：The thick lamellar meat of 40mm is chosen from Carnis caprae seu ovis to be detected as to be checked
Test sample product；
Step 200, is detected：By computer and light intensity adjusting means, spectrogrph, each block of positioning electric magnet and each
Block power for traction Magnet is electrically connected, and sample is kept flat on sample tray；
Step 210, the positioning in computer controlling center vertical core are powered with electric magnet, in the suction of positioning electric magnet
Under effect, in metal column insertion center vertical core, serial number i of setting edge vertical core, i=1 ..., 8, i initial value is 1；
Step 220, computer adjust light emitting head by light intensity adjusting means and export detection light, as shown in figure 5,10
In second time detection light from 0 according to 200 lux of maximum is ramped, then from 200 Le of maximum within 10 second time
Ke Si drops to 0 according to sine curve；Spectrogrph receives detection signal Spect (t) corresponding with detection light；
Step 230, the electric magnet power-off of the positioning in computer controlling center vertical core control the positioning in edge vertical core i
It is powered with electric magnet, computer controls line is powered through two power for traction Magnet of edge vertical core i, 2 blocks of power for traction magnetic
Ferrum and the captivation produced by each piece of traction magnet piece and repulsive force drive sample tray to move on liquid level, when being moved to side
When at edge vertical core i, metal column is inserted in edge vertical core i in the presence of captivation, and computer controls line passes through edge vertical core i
Two power for traction Magnet power-off, repeat step 220；
Positioning in computer controlling center vertical core is powered with electric magnet, and the positioning in computer controls edge vertical core i is used
Electric magnet power-off, controls line and is powered through two power for traction Magnet of edge vertical core i, 2 blocks of power for traction Magnet with each piece
Captivation and repulsive force produced by traction magnet piece drives sample tray to move on liquid level, and sample tray is moved to center
Vertical core and metal column is inserted in the vertical core of center in the presence of captivation；
Step 240, as i ＜ m, makes i values increase 1, repeat step 230；
Obtain 9 detection signals Spect (t)；
Step 300, data processing：
Computer does following data processing to 9 detection signals Spect (t)：
Detection signal Spect (t) is input into into one layer of accidental resonance model：
In, wherein, V (x, t, α) is potential function, and x (t) is Brownian movement Particles Moving lopcus function, and a, b are the normal of setting
Number, ξ (t) is outer noise, and D is that, with the outer noise intensity of 0.01 stepping in the range of [0,1], N (t) grasps noise for interior,For periodic sinusoidal signal, A is signal amplitude, and f is signal frequency, and t is movement time,For phase place, if
Computer calculates V (x, t, α) for the first derivative of x (t), second dervative and three order derivatives, and makes equation etc.
In 0, two layers of accidental resonance model are obtained：
Setting noise intensity D=0,Spect (t)=0, N (t)=0；The marginal value for being calculated A isThe marginal value of A is substituted in one layer of accidental resonance model, and sets X0(t)=0, sn0=0, use quadravalence jade for asking rain
One layer of accidental resonance model of Ge Kuta Algorithm for Solving, obtains
And calculate undetermined coefficient：
(k1)n=a (α xn-1(t))2-b(αxn-1(t))3+snn-1
Wherein, xnThe n order derivatives of (t) for x (t), snn-1It is value of the n-1 order derivatives of S (t) at t=0, Snn+1It is S
Value of the n+1 order derivatives of (t) at t=0, n=0,1 ..., N-1；Obtain x1(t), x2(t) ..., xn+1The value of (t)；
Computer is to x1(t), x2(t) ..., xn+1T () is integrated, obtain x (t), and it is random common at one layer to obtain x (t)
Shake model and two layers of accidental resonance model composition the double-deck stochastic system generation accidental resonance moment time at optimal detection moment
T1, optimum transient motion acceleration alpha 1, and determine the noise D1 corresponding to t1 and α 1；D1A value in for D；D is in [0,1]
In the range of with a function of 0.01 loop cycle stepping, the value of D and time correlation, it is known that t1Moment, D1Determine that.
Computer utilizes formulaCalculate the letter of double-deck stochastic resonance system output
Make an uproar ratio；Wherein, △ U=a2/4b；Obtain 9 output signal-to-noise ratio SNR1, SNR2..., SNRm+1；
Step 400, Error Calculation：
Computer utilizes formulaCalculate corresponding to kth group pivoting angle data
Output signal-to-noise ratio error QEk, wherein, k=1 ..., 9；
Computer is calculated and meets QEkNumber M of≤5% output signal-to-noise ratio error1；Computer is calculated and meets QEk＞ 5%
Output signal-to-noise ratio error number M2；
Step 500, judges：
IfThen computer makes the fresh judgement of sample；
IfThen computer makes the stale judgement of sample；
Otherwise, return to step 210, detect to sample again and carry out data processing.
M in the present embodiment1=8,Therefore, computer makes the stale judgement of sample.
Embodiment 2
In embodiment 2, as shown in figure 3, motor 14 in the container below each vertical core, is equipped with, each positioning electric magnet
Be connected with the vertical rotating shaft of each motor respectively, keeper 15 is equipped with each positioning electric magnet, on each keeper
End offers cross groove 16, and metal column lower end is provided with the cross projection 17 corresponding with cross groove, each electricity
Machine is provided with for the signaling interface with calculating mechatronics.Metal column is provided with spring 23.
Step 220 in embodiment 2 is replaced by following step：
As shown in figure 5, computer adjusts light emitting head by light intensity adjusting means exports detection light, detection light is pressed from 0
Directly line rises to 200 lux of maximum, then drops to 0 according to sine curve from 200 lux of maximum；Detecting
Cheng Zhong, the rotating shaft of the computer controls motor corresponding with the vertical core inserted by metal column drive sample tray to rotate 2 weeks, spectrum
Instrument receives detection signal Spect (t) corresponding with detection light.
Other results and method part in embodiment 2 are in the same manner as in Example 1.
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After having read the content of instruction of the present invention, those skilled in the art can be made various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (10)
1. a kind of Carnis caprae seu ovis freshness detection device, is characterized in that, including light tight housing, laser array (20), spectrogrph
(1), light intensity adjusting means (2), the container (3) of the upper end open in housing, support (5), the circle in container
Sample tray (4), on support for the light emitting head (6) to sample irradiation light and for receiving the reflected light of sample
Light-receiving head (7)；Light intensity adjusting means, laser array, light emitting head are sequentially connected electrically, and light-receiving head is electrically connected with spectrogrph
Connect；Container and sample tray are made by non-magnet_conductible material, and liquid is provided with the container, and the sample tray is suspended in liquid
On surface, container bottom is provided with center vertical core and the m edge vertical core circumferentially arranged around center vertical core, each vertical core (8)
Positioning electric magnet (9) is equipped with upward opening and vertical core, it is interior in the middle part of the sample tray to be provided with positioning magnet piece,
Upper end through the metal column (11) of sample tray lower surface is connected with magnet piece with positioning, and positioning electric magnet and positioning are used
The pole polarity of magnet piece opposite end is contrary；
Sample tray outward flange is provided with some traction magnet pieces to the distribution that is centrosymmetric, and container inside face top is provided with
The some power for traction Magnet (13) to being centrosymmetric being engaged with traction magnet piece；Light intensity adjusting means, spectrum
It is equipped with instrument, each block of positioning electric magnet and each block of power for traction Magnet for the signaling interface with calculating mechatronics.
2. Carnis caprae seu ovis freshness detection device according to claim 1, is characterized in that, be all provided with the container below each vertical core
There is motor (14), each positioning electric magnet is connected with the vertical rotating shaft of each motor respectively, on each positioning electric magnet
Keeper (15) is provided with, each keeper upper end offers cross groove (16), metal column lower end is provided with recessed with cross
The corresponding cross projection (17) of groove, each motor are provided with the signaling interface for electrically connecting with computer (24).
3. Carnis caprae seu ovis freshness detection device according to claim 1, is characterized in that, the laser array includes 6 bundles
Be held together and single wavelength laser that wavelength is arranged in order, the wavelength of each single wavelength laser be respectively 585nm,
920nm, 512nm, 816nm, 670nm and 720nm.
4. Carnis caprae seu ovis freshness detection device according to claim 1, is characterized in that, the light intensity adjusting means includes number
According to capture card (18) and power amplifier (19), the data collecting card is provided with for the signal input with calculating mechatronics
Interface, the data collecting card are electrically connected with the input of power amplifier, the outfan and laser instrument of the power amplifier
The power electric connection of array.
5. the Carnis caprae seu ovis freshness detection device according to claim 1 or 2 or 3 or 4, is characterized in that, support is L-shaped, including
Flat board and column；Light emitting head and light-receiving head are connected with flat board by montant respectively；Each piece of traction magnet piece is in bar
Shape, the pole polarity on the outside of each piece of traction magnet piece are identical.
6. a kind of detection method of the Carnis caprae seu ovis freshness detection device suitable for described in claim 1, is characterized in that, including as follows
Step：
(6-1) according to CNS GB/T 5009.44-2003, the volatile salts of the different resting period meat samples of detection
Base nitrogen TVB-N values, and obtain freshness threshold SNR corresponding with m+1 sample detection point differencethre1, SNRthre2...,
SNRthre(m+1)；
(6-2) sample preparation：Lamellar meat is chosen from Carnis caprae seu ovis to be detected as detected sample；
(6-3) detected：By computer and light intensity adjusting means, spectrogrph, each block of positioning electric magnet and each piece of traction
Electrically connected with electric magnet, sample is kept flat on sample tray；
(6-3-1) positioning in computer controlling center vertical core is powered with electric magnet, in the effect of the suction of positioning electric magnet
Under, in metal column insertion center vertical core, serial number i of edge vertical core being set, the initial value of i=1 ..., m, i is 1；
(6-3-2) computer adjusts light emitting head by light intensity adjusting means and exports detection light, and the detection light is from 0 according to straight
Line rises to maximum MAT, then drops to 0 according to sine curve from maximum MAT；Spectrogrph receives relative with detection light
Detection signal Spect (t) answered；
(6-3-3) the positioning electric magnet power-off in computer controlling center vertical core, controls the positioning electromagnetism in edge vertical core i
Tie Tong electricity, computer controls line are powered through two power for traction Magnet of edge vertical core i, 2 blocks of power for traction Magnet with it is each
Captivation produced by block traction magnet piece and repulsive force drive sample tray to move on liquid level, when being moved to edge vertical core
When at i, metal column is inserted in edge vertical core i in the presence of captivation, computer controls line two through edge vertical core i
Power for traction Magnet power-off, repeat step (6-3-2)；
Positioning in computer controlling center vertical core is powered with electric magnet, the positioning electromagnetism in computer controls edge vertical core i
Ferrum power-off, controls line and is powered through two power for traction Magnet of edge vertical core i, and 2 blocks of power for traction Magnet are drawn with each piece
Sample tray is driven to move on liquid level with the captivation produced by magnet piece and repulsive force, sample tray is moved to center vertical core
And metal column is inserted in the vertical core of center in the presence of captivation；
(6-3-4) as i ＜ m, i values are made to increase 1, repeat step (6-3-3)；
Obtain m+1 detection signal Spect (t)；
(6-4) computer does following data processing to m+1 detection signal Spect (t)：
Detection signal Spect (t) is input into into one layer of accidental resonance model：
In, wherein, V (x, t, α) is potential function, and x (t) is Brownian movement Particles Moving lopcus function, and a, b are the constant of setting, ξ
T () is outer noise, D is that, with the outer noise intensity of 0.01 stepping in the range of [0,1], N (t) grasps noise for interior,For periodic sinusoidal signal, A is signal amplitude, and f is signal frequency, and t is movement time,For phase place, if
Computer calculates V (x, t, α) for the first derivative of x, second dervative and three order derivatives, and makes equation equal to 0, obtains
Two layers of accidental resonance model：
Setting noise intensity D=0,Spect (t)=0, N (t)=0；The marginal value for being calculated A isThe marginal value of A is substituted in one layer of accidental resonance model, and sets X0(t)=0, sn0=0, with quadravalence jade for asking rain Ge Kuta
One layer of accidental resonance model of Algorithm for Solving, obtains
N=0,1 ..., N-1
Wherein undetermined coefficient：
(k1)n=a (α xn-1(t))2-b(αxn-1(t))3+snn-1
Wherein, xnThe n order derivatives of (t) for x (t), snn-1It is value of the n-1 order derivatives of S (t) at t=0, snn+1It is the n+ of S (t)
Value of 1 order derivative at t=0, n=0,1 ..., N-1；Obtain x1(t), x2(t) ..., xn+1The value of (t)；
Computer is to x1(t), x2(t) ..., xn+1T () is integrated, obtain x (t), and obtain x (t) in one layer of accidental resonance mould
The double-deck stochastic system of type and two layers of accidental resonance model composition produces the optimal detection moment time t1 at accidental resonance moment, most
Excellent transient motion acceleration alpha 1, and determine the noise D1 corresponding to t1 and α 1；
Computer utilizes formulaCalculate the signal to noise ratio of double-deck stochastic resonance system output；
Wherein, Δ U=a2/4b；Obtain m+1 output signal-to-noise ratio SNR1, SNR2..., SNRm+1；
(6-5) computer utilizes formulaCalculate corresponding to kth group pivoting angle data
Output signal-to-noise ratio error QEk, wherein, k=1 ..., m+1；
Computer is calculated and meets QEkNumber M of≤5% output signal-to-noise ratio error1；Computer is calculated and meets QEk＞'s 5% is defeated
Go out number M of noise ratio error2；
If (6-6)Then computer makes the fresh judgement of sample；
IfThen computer makes the stale judgement of sample；
Otherwise, return to step (6-3-1), detects to sample again and carries out data processing.
7. the detection method of Carnis caprae seu ovis freshness detection device according to claim 6, the container below described each vertical core
Motor is equipped with inside, each positioning electric magnet is connected with the vertical rotating shaft of each motor, on each positioning electric magnet
Keeper is provided with, each keeper upper end offers cross groove, metal column lower end is provided with corresponding with cross groove
Cross projection, each motor are provided with for the signaling interface with calculating mechatronics；It is characterized in that,
Step (6-3-2) is replaced by following step：
Computer adjusts light emitting head by light intensity adjusting means and exports detection light, and the detection light is from 0 according to ramping
To maximum MAT, then 0 is dropped to according to sine curve from maximum MAT；In detection process, computer controls and metal
The rotating shaft of the corresponding motor of vertical core that post is inserted drives that sample tray rotation 1 to 2 is all, and spectrogrph is received and detection light phase
Corresponding detection signal Spect (t).
8. the detection method of Carnis caprae seu ovis freshness detection device according to claim 6, is characterized in that, the thickness of the lamellar meat
Spend for 31 to 73mm.
9. the detection method of Carnis caprae seu ovis freshness detection device according to claim 6, is characterized in that, the incidence of light emitting head
Angle is 15 to 60 degree.
10. the detection method of the Carnis caprae seu ovis freshness detection device according to claim 6 or 7 or 8 or 9, is characterized in that, MAT
Span be 108 luxs to 207 luxs.
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