CN104251817A - Device and method for rapid detection of snowflake beef - Google Patents

Abstract

The invention discloses a device and method for rapid detection of snowflake beef. The device comprises a controller and a detection platform. The controller comprises a central processing unit, a touch screen, a light control module and a voice output module. The detection platform comprises a base; and the base is provided with a sample supporting plate, the sample supporting plate through a first supporting column is connected with the base, the middle of the sample supporting plate is provided with a transparent window, an irradiation light source is arranged above the transparent window, a receiver is arranged below the transparent window, and the base is provided with a first moving mechanism driving the irradiation light source to move and a second moving mechanism driving the receiver to move. The central processing unit is respectively electrically connected with the touch screen, the light source control module, the voice output module, the receiver, the first moving mechanism and the second moving mechanism, and the light control module is also electrically connected with the irradiation light source. The invention can conduct rapid, simple and accurate detection to determine whether the beef is snowflake beef.

Description

A kind of apparatus and method of quick detection snowflakes beef

Technical field

The present invention relates to technical field of food detection, particularly relate to a kind of apparatus and method of quick detection snowflakes beef.

Background technology

Top grade beef refers to the high quality beef making international luxury food, and require that muscle fibre is delicate, succulence, containing a certain amount of fat between muscle, lipochondrion is tiny, is evenly distributed in musculature, becomes marble grain, is commonly called as " snowflakes beef ".At present, snowflakes beef generally judges by people's naked eyes, judges not accurate enough, and easily occurs human error.

China Patent Publication No. CN1603794, publication date on April 6th, 2005, the name of invention is called the method and apparatus of rapidly detecting tenderness of beef utilizing near infrared technology, this application case discloses a kind of method and apparatus of rapidly detecting tenderness of beef utilizing near infrared technology, and it is made up of near-infrared light source, near infrared detector, diffuse reflection fiber plant, microprocessor, display and pen recorder and rotatable objective table.Its weak point is, whether this pick-up unit can not detect beef is snowflakes beef.

Summary of the invention

The object of the invention is to overcome current beef pick-up unit and can not detect the technical matters whether beef be snowflakes beef, provide a kind of apparatus and method of quick detection snowflakes beef, it can detect whether beef is snowflakes beef quick, easy, exactly.

In order to solve the problem, the present invention is achieved by the following technical solutions:

The device of a kind of quick detection snowflakes beef of the present invention, comprise controller and detection platform, described controller comprises CPU (central processing unit), touch-screen, light source control module and voice output module, described detection platform comprises base, described base is provided with sample splint, described sample splint is connected with base by the first support column, the middle part of described sample splint is provided with transparent window, radiation source is provided with above described transparent window, receiver is provided with below described transparent window, described base is also provided with the first motion driving radiation source movement and the second motion driving receiver movement, described CPU (central processing unit) respectively with touch-screen, light source control module, voice output module, receiver, first motion and the electrical connection of the second motion, described light source control module is also electrically connected with radiation source.

In the technical program, radiation source is Halogen lamp LED or generating laser.During detection, beef sample to be measured is placed on the transparent window place of sample splint.CPU (central processing unit) controls radiation source motion by the first motion, controls receiver motion by the second motion, the detection light through beef sample and transparent window guaranteeing that receiver can receive that radiation source sends all the time.

Controller controls radiation source and rotates a circle with certain irradiating angle, often horizontally rotates 5 degree of detection spectroscopic datas that stop.When detecting spectroscopic data, the intensity curve of the detection light that radiation source sends first rises to maximal value from 0 according to tangent cutve, then drops to 0 from maximal value according to sinusoidal curve.Receiver detects the transmitted intensity received, and sends it to controller, and controller judges whether beef sample to be measured is snowflakes beef after carrying out respective handling to detection data.

The present invention is that the incident light adopting light intensity constantly to change irradiates sample, in the intensity of incident light gradually in the large or change procedure that reduces, the absorption of different groups to respective wavelength light is gradually large or reduction, now the degree of absorption of group is in unsaturation, saturated diminuendo process, comprise more Detection Information in transmitted light, thus whether enable the detection signal obtained symbolize beef be more accurately snowflakes beef.

As preferably, described first motion comprises elevating mechanism, transverse link, longitudinal rod, first drive motor and the second drive motor, described elevating mechanism is arranged on base, described transverse link one end is connected with elevating mechanism, the transverse link other end is connected with the first drive motor, the rotating shaft of described first drive motor straight down, the top of described longitudinal rod is connected with the rotating shaft of the first drive motor, the bottom of described longitudinal rod is connected with the second drive motor, the rotating shaft of described second drive motor is horizontally disposed with, described radiation source is connected with the rotating shaft of the second drive motor, the direction of illumination of radiation source is towards transparent window, described elevating mechanism, first drive motor and the second drive motor are electrically connected with CPU (central processing unit) respectively.

Elevating mechanism can drive transverse link to be elevated, thus moves under driving radiation source in the vertical direction; First drive motor can drive longitudinal rod to rotate, thus drives radiation source to rotate in the horizontal direction; Second drive motor can drive radiation source to rotate at vertical direction.Controller adjusts the position of radiation source by elevating mechanism, the first drive motor and the second drive motor and sends the incident angle detecting light.

As preferably, described second motion comprises the rotating mechanism be arranged on base and the arc track being arranged on rotating mechanism top, described receiver is arranged on arc track, the bottom surface of described arc track is provided with two arc grooves be parallel to each other, curved tooth bar is provided with in arc groove, the bottom of described receiver is provided with the 3rd drive motor of two gears and driven wheel rotation, described two gears engage with two tooth bars respectively, two sidewalls of described arc track are arranged with curved stopper slot, the both sides of described receiver are respectively equipped with the limited block coordinated with stopper slot, described rotating mechanism and the 3rd drive motor are electrically connected with CPU (central processing unit) respectively.

Radiation source is positioned at the arc core position of arc track, and receiver is towards the arc core position of arc track.Rotating mechanism can drive arc track to horizontally rotate, and makes radiation source and arc track be positioned at same plane, as long as therefore the receiver correspondence position moved on arc track just can receive the detection light that radiation source sends.3rd drive motor can rotate by driven wheel, thus receiver is moved on arc track, and limited block can limit the position of receiver, prevents receiver from leaving arc track.

As preferably, described light source control module comprises function memory and power amplifier, the input end of described function memory is electrically connected with CPU (central processing unit), and the output terminal of described function memory is electrically connected with the input end of power amplifier, and the output terminal of described power amplifier is electrically connected with radiation source.Function memory stores the function information that CPU (central processing unit) sends, and controls by power amplifier the detection light that radiation source sends varying strength.

As preferably, described transparent window is the quartz glass of 0.7mm-0.8mm.

As preferably, the four-wheel drive motor that described elevating mechanism comprises screw mandrel, support bar and drives screw mandrel to rotate, screw mandrel and support bar are vertically arranged on base, one end that transverse link is connected with elevating mechanism is provided with the thread bush be set on screw mandrel and the sleeve pipe be set on support bar, and four-wheel drive motor is electrically connected with CPU (central processing unit).

As preferably, the 5th drive motor that described rotating mechanism comprises the second support column and drives the second support column to rotate, the second support column is arranged on base, and the 5th drive motor is electrically connected with CPU (central processing unit).

The method of a kind of quick detection snowflakes beef of the present invention, comprises the following steps:

S1: preparation sheet beef sample, is placed on the transparent window place of sample splint by beef sample, what make beef sample is centrally located at immediately below longitudinal rod;

S2: controller controls radiation source by the second drive motor and rotates, the angle of radiation source and vertical direction is made to be 20-40 degree, controller is by the position of the second motion adjustment receiver, and receiver is received, and radiation source sends through the detection light of beef sample and transparent window;

S3: the detection light that controller sends certain light intensity by light source control module control radiation source is radiated on beef sample, detect light intensity and first rise to maximal value from 0 according to tangent cutve, then 0 is dropped to from maximal value according to sinusoidal curve, controller acquisition of transmission spectroscopic data Spect (t), then controller controls longitudinal rod by the first drive motor and rotates 5 degree, radiation source is made to horizontally rotate 5 degree, control receiver and move to correspondence position, gather the spectroscopic data of now radiation source point of irradiation, control radiation source horizontal rotary like this circles, often horizontally rotate 5 degree of detection spectroscopic datas that stop, thus on beef sample, gather spectroscopic data Spect (t) of 72 diverse locations,

S4: collect 72 spectroscopic datas Spect (t) are all carried out same data processing, calculates 72 signal to noise ratio (S/N ratio) eigenwerts, the data processing that each spectroscopic data Spect (t) is carried out is comprised the following steps:

Adopt input signal as input matrix, potential function V (x, t) and input signal are worked in coordination with as one deck accidental resonance model:

Wherein, V (x, t) is potential function, and x (t) is Brownian Particles movement locus function, and t is run duration, for periodic sinusoidal signal, N (t) grasps noise in being, A is signal amplitude, and f is signal frequency, and D is external noise intensity, and ξ (t) is external noise, for phase place,

Calculate V (x, t) for the first order derivative of x and second derivative, and make equation equal 0, obtain two layers of accidental resonance model:

Setting noise intensity D=0, spect (t)=0, N (t)=0, B=1, the critical value calculating A is by A _csubstitute in formula (1), and set x ₀(t)=0, sn ₀=0, adopt quadravalence jade for asking rain Ge Kuta Algorithm for Solving formula (1), obtain:

$x_{n+1}\left(t\right)=x_n\left(t\right)+1/6[{\left(k_1\right)}_n+(2-\sqrt{2}){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n],n=\mathrm{0,1},...,N-1---\left(3\right)$

Undetermined coefficient:

${\left(k_1\right)}_n=4({\mathrm{ax}}_{n-1}\left(t\right)-{\mathrm{bx}}_{n-1}^3\left(t\right)+{\mathrm{sn}}_{n-1})---\left(4\right)$

${\left(k_2\right)}_n=4[a(x_{n-1}\left(t\right)+\frac{{\left(k_1\right)}_{n-1}}{2})-b{(x_{n-1}\left(t\right)+\frac{{\left(k_1\right)}_{n-1}}{2})}^3+{\mathrm{sn}}_{n-1}]---\left(5\right)$

${\left(k_3\right)}_n=4[a(x_{n-1}\left(t\right)+\frac{{\left(k_2\right)}_{n-1}}{2})-b{(x_{n-1}\left(t\right)+\frac{\sqrt{2}-1}{2}{\left(k_1\right)}_{n-1}+\frac{2-\sqrt{2}}{2}{\left(k_2\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}]---\left(6\right)$

${\left(k_4\right)}_n=4[a(x_{n-1}\left(t\right)+{\left(k_3\right)}_{n-1})-b{(x_{n-1}\left(t\right)-\frac{\sqrt{2}}{2}{\left(k_2\right)}_{n-1}+\frac{2+\sqrt{2}}{2}{\left(k_3\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}]---\left(7\right)$

Wherein, x _nt n order derivative that () is x (t), snn is the value of n order derivative at t=0 place of S (t), and a, b are the constant of setting,

Calculate x ₁(t), x ₂(t) ... x _n+1t the value of (), to x ₁(t), x ₂(t) ... x _n+1t () is carried out integration and is obtained x _(t), and obtain x _(t)the position x in resonance moment is produced in the double-deck stochastic resonance system of one deck accidental resonance model and two layers of accidental resonance model composition _mvalue and x _mcorresponding resonance moment t1 and the noise D1 corresponding with t1, D1 are a value in D,

Pass through formula calculate signal to noise ratio (S/N ratio) eigenwert SNR _feature, wherein, Δ U=a ²/ 4b;

S5: by 72 the signal to noise ratio (S/N ratio) eigenwert SNR calculated _featurecompare, if SNR with the threshold value of setting respectively _feature>-68.74 judges that check point corresponding to this signal to noise ratio (S/N ratio) eigenwert is white spectrum point, if SNR _feature<-77.49 judges that check point corresponding to this signal to noise ratio (S/N ratio) eigenwert is red spectrum point;

S6: add up the number N1 of white spectrum point and the number N2 of red spectrum point, if and then judge that this beef is snowflakes beef, if and then judge that this beef is not snowflakes beef, otherwise jump to step S3, detection is re-started to beef sample.

As preferably, described step S2 middle controller is comprised the following steps by the position of the second motion adjustment receiver: radiation source continues the constant irradiation light of emissive porwer, controller controls receiver according to radiation source rotation direction and moves towards correspondence direction, and the irradiation light intensity that monitoring receiver receives, the position that the irradiation light intensity finally making receiver rest on to receive is maximum.

As preferably, described step S3 middle controller controls receiver and moves to correspondence position and comprise the following steps: controller drives arc track to rotate respective angles according to the rotational angle of longitudinal rod by rotating mechanism.

Substantial effect of the present invention is: can detect whether beef is snowflakes beef quick, easy, exactly.

Accompanying drawing explanation

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is the structural representation of the second motion of the present invention;

Fig. 3 is the sectional view of arc track of the present invention;

Fig. 4 is that circuit theory of the present invention connects block diagram;

The light intensity curve figure of the detection light that radiation source sends when Fig. 5 is detection.

In figure: 1, CPU (central processing unit), 2, touch-screen, 3, light source control module, 4, base, 5, second support column, 6, sample splint, 7, transparent window, 8, radiation source, 9, receiver, 10, elevating mechanism, 11, transverse link, 12, longitudinal rod, 13, first drive motor, 14, second drive motor, 15, rotating mechanism, 16, arc track, 17, arc groove, 18, gear, 19, 3rd drive motor, 20, stopper slot, 21, limited block, 22, function memory, 23, power amplifier, 24, first support column, 25, screw mandrel, 26, support bar, 27, thread bush, 28, sleeve pipe, 29, voice output module.

Embodiment

Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.

Embodiment: the device of a kind of quick detection snowflakes beef of the present embodiment, as Fig. 1, Fig. 2, shown in Fig. 3, comprise controller and detection platform, controller comprises CPU (central processing unit) 1, touch-screen 2, light source control module 3 and voice output module 29, light source control module 3 comprises function memory 22 and power amplifier 23, detection platform comprises base 4, base 4 is provided with sample splint 6, sample splint 6 is connected with base 4 by the first support column 24, the middle part of sample splint 6 is provided with transparent window 7, radiation source 8 is provided with above transparent window 7, receiver 9 is provided with below transparent window 7, base 4 is also provided with the first motion driving radiation source 8 movement and the second motion driving receiver 9 movement.

First motion comprises elevating mechanism 10, transverse link 11, longitudinal rod 12, first drive motor 13 and the second drive motor 14, elevating mechanism 10 is arranged on base 4, transverse link 11 one end is connected with elevating mechanism 10, transverse link 11 other end is connected with the first drive motor 13, the rotating shaft of the first drive motor 13 straight down, the top of longitudinal rod 12 is connected with the rotating shaft of the first drive motor 13, the bottom of longitudinal rod 12 is connected with the second drive motor 14, the rotating shaft of the second drive motor 14 is horizontally disposed with, radiation source 8 is connected with the rotating shaft of the second drive motor 14, the direction of illumination of radiation source 8 is towards transparent window 7.

Second motion comprises the rotating mechanism 15 be arranged on base 4 and the arc track 16 being arranged on rotating mechanism 15 top, receiver 9 is arranged on arc track 16, the bottom surface of arc track 16 is provided with two arc grooves be parallel to each other 17, curved tooth bar is provided with in arc groove 17, the bottom of receiver 9 is provided with the 3rd drive motor 19 of two gears 18 and driven wheel 18 rotation, two gears 18 engage with two tooth bars respectively, two sidewalls of arc track 16 are arranged with curved stopper slot 20, the both sides of receiver 9 are respectively equipped with the limited block 21 coordinated with stopper slot 20.

As shown in Figure 4, CPU (central processing unit) 1 is electrically connected with the input end of touch-screen 2, voice output module 29, receiver 9, elevating mechanism 10, first drive motor 13, second drive motor 14, rotating mechanism 15, the 3rd drive motor 19, function memory 22 respectively, the output terminal of function memory 22 is electrically connected with the input end of power amplifier 23, and the output terminal of power amplifier 23 is electrically connected with radiation source 8.

Transparent window 7 is the quartz glass of 0.8mm, and radiation source 8 is Halogen lamp LED.The four-wheel drive motor that elevating mechanism comprises screw mandrel 25, support bar 26 and drives screw mandrel 25 to rotate, screw mandrel 25 and support bar 26 are vertically arranged on base 4, one end that transverse link 11 is connected with elevating mechanism 10 is provided with the thread bush 27 be set on screw mandrel 25 and the sleeve pipe 28 be set on support bar 26, and four-wheel drive motor is electrically connected with CPU (central processing unit) 1.The 5th drive motor that rotating mechanism 15 comprises the second support column 5 and drives the second support column 5 to rotate, the second support column 5 is arranged on base 4, and the 5th drive motor is electrically connected with CPU (central processing unit) 1.

Elevating mechanism 10 can drive transverse link 11 to be elevated, thus moves under driving radiation source 8 in the vertical direction; First drive motor 13 can drive longitudinal rod 12 to rotate, thus drives radiation source 8 to rotate in the horizontal direction; Second drive motor 14 can drive radiation source 8 to rotate at vertical direction.Controller adjusts the position of radiation source 8 by elevating mechanism 10, first drive motor 13 and the second drive motor 14 and sends the incident angle detecting light.

Radiation source 8 is positioned at the arc core position of arc track 16, and receiver 9 is towards the arc core position of arc track 16.Rotating mechanism 15 can drive arc track 16 to horizontally rotate, and makes radiation source 8 and arc track 16 be positioned at same plane, as long as therefore receiver 9 correspondence position moved on arc track 16 just can receive the detection light that radiation source 8 sends.3rd drive motor 19 can rotate by driven wheel 18, thus receiver 9 is moved on arc track 16, and limited block 21 can limit the position of receiver 9, prevents receiver 9 from leaving arc track 16.Function memory 22 stores the function information that CPU (central processing unit) 1 sends, and controls by power amplifier 23 the detection light that radiation source 8 sends varying strength.

During detection, beef sample to be measured is placed on transparent window 7 place of sample splint 6.CPU (central processing unit) 1 controls radiation source 8 by the first motion and moves, and controls receiver 9 move by the second motion, the detection light through beef sample and transparent window 7 guaranteeing that receiver 9 can receive that radiation source 8 sends all the time.

Controller controls radiation source 8 and rotates a circle with certain irradiating angle, often horizontally rotates 5 degree of detection spectroscopic datas that stop.When detecting spectroscopic data, the intensity curve of the detection light that radiation source 8 sends first rises to maximal value from 0 according to tangent cutve, then drops to 0 from maximal value according to sinusoidal curve, as shown in Figure 5.Receiver 9 detects the transmitted intensity received, and sends it to controller, and after controller carries out respective handling to detection data, judge whether beef sample to be measured is snowflakes beef, voice output module 29 is by voice broadcast testing result.

The present invention is that the incident light adopting light intensity constantly to change irradiates sample, in the intensity of incident light gradually in the large or change procedure that reduces, the absorption of different groups to respective wavelength light is gradually large or reduction, now the degree of absorption of group is in unsaturation, saturated diminuendo process, comprise more Detection Information in transmitted light, thus whether enable the detection signal obtained symbolize beef be more accurately snowflakes beef.

The method of a kind of quick detection snowflakes beef of the present embodiment, comprises the following steps:

S1: prepare the beef sample that thickness is 4mm-5mm, is placed on the transparent window place of sample splint by beef sample, what make beef sample is centrally located at immediately below longitudinal rod;

S2: controller controls radiation source by the second drive motor and rotates, the angle of radiation source and vertical direction is made to be 35 degree, controller is by the position of the second motion adjustment receiver, and receiver is received, and radiation source sends through the detection light of beef sample and transparent window;

S3: the detection light that controller sends certain light intensity by light source control module control radiation source is radiated on beef sample, detect light intensity and first rise to maximal value from 0 according to tangent cutve, then 0 is dropped to from maximal value according to sinusoidal curve, controller acquisition of transmission spectroscopic data Spect (t), then controller controls longitudinal rod by the first drive motor and rotates 5 degree, radiation source is made to horizontally rotate 5 degree, control receiver and move to correspondence position, gather the spectroscopic data of now radiation source point of irradiation, control radiation source horizontal rotary like this circles, often horizontally rotate 5 degree of detection spectroscopic datas that stop, thus on beef sample, gather spectroscopic data Spect (t) of 72 diverse locations,

S4: collect 72 spectroscopic datas Spect (t) are all carried out same data processing, calculates 72 signal to noise ratio (S/N ratio) eigenwerts, the data processing that each spectroscopic data Spect (t) is carried out is comprised the following steps:

Adopt input signal as input matrix,

Under adiabatic approximation condition, suppose signal amplitude minimum (A<<1), bistable system is not when having enough energy drives, Brownian movement particle is offset in the potential well of side, signal period is more than system relaxation time length in some typical potential wells, the now appearance of cyclic drive power makes potential function run-off the straight, finally cause Brownian movement particle from a potential well to the transition of another one potential well, therefore potential function V (x, t) and input signal are worked in coordination with as one deck accidental resonance model:

Wherein, V (x, t) is potential function, and x (t) is Brownian Particles movement locus function, and t is run duration, for periodic sinusoidal signal, N (t) grasps noise in being, A is signal amplitude, and f is signal frequency, and D is external noise intensity, and ξ (t) is external noise, for phase place,

Calculate V (x, t) for the first order derivative of x and second derivative, and make equation equal 0, obtain two layers of accidental resonance model:

Setting noise intensity D=0, spect (t)=0, N (t)=0, B=1, the critical value calculating A is at A<A _cwhen, Brownian movement particle is hovered about its original position, can not realize the transition between two potential wells, but particle is when obtaining external noise and intervening, even if A<A _cit also can complete the transition between potential well, and the generating process of Here it is accidental resonance, by A _csubstitute in formula (1), and set x ₀(t)=0, sn ₀=0, adopt quadravalence jade for asking rain Ge Kuta Algorithm for Solving formula (1), obtain:

$x_{n+1}\left(t\right)=x_n\left(t\right)+1/6[{\left(k_1\right)}_n+(2-\sqrt{2}){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n],n=\mathrm{0,1},...,N-1---\left(3\right)$

Undetermined coefficient:

${\left(k_1\right)}_n=4({\mathrm{ax}}_{n-1}\left(t\right)-{\mathrm{bx}}_{n-1}^3\left(t\right)+{\mathrm{sn}}_{n-1})---\left(4\right)$

${\left(k_2\right)}_n=4[a(x_{n-1}\left(t\right)+\frac{{\left(k_1\right)}_{n-1}}{2})-b{(x_{n-1}\left(t\right)+\frac{{\left(k_1\right)}_{n-1}}{2})}^3+{\mathrm{sn}}_{n-1}]---\left(5\right)$

${\left(k_3\right)}_n=4[a(x_{n-1}\left(t\right)+\frac{{\left(k_2\right)}_{n-1}}{2})-b{(x_{n-1}\left(t\right)+\frac{\sqrt{2}-1}{2}{\left(k_1\right)}_{n-1}+\frac{2-\sqrt{2}}{2}{\left(k_2\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}]---\left(6\right)$

${\left(k_4\right)}_n=4[a(x_{n-1}\left(t\right)+{\left(k_3\right)}_{n-1})-b{(x_{n-1}\left(t\right)-\frac{\sqrt{2}}{2}{\left(k_2\right)}_{n-1}+\frac{2+\sqrt{2}}{2}{\left(k_3\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}]---\left(7\right)$

Wherein, x _nt n order derivative that () is x (t), sn _nbe the value of n order derivative at t=0 place of S (t), a, b are the constant of setting,

Calculate x ₁(t), x ₂(t) ... x _n+1t the value of (), to x ₁(t), x ₂(t) ... x _n+1t () is carried out integration and is obtained x _(t), and obtain x _(t)the position x in resonance moment is produced in the double-deck stochastic resonance system of one deck accidental resonance model and two layers of accidental resonance model composition _mvalue and x _mcorresponding resonance moment t1 and the noise D1 corresponding with t1, D1 are a value in D,

Pass through formula , calculate signal to noise ratio (S/N ratio) eigenwert SNR _feature, wherein, Δ U=a ²/ 4b;

S5: by 72 the signal to noise ratio (S/N ratio) eigenwert SNR calculated _featurecompare, if SNR with the threshold value of setting respectively _feature>-68.74 judges that check point corresponding to this signal to noise ratio (S/N ratio) eigenwert is that white spectrum is selected (fat meat), if SNR feature <-77.49 judges this signal to noise ratio (S/N ratio) eigenwert, corresponding check point is that red spectrum is selected (lean meat);

S6: add up the number N1 of white spectrum point and the number N2 of red spectrum point, if and then judge that this beef is snowflakes beef, if and then judge that this beef is not snowflakes beef, otherwise jump to step S3, detection is re-started to beef sample.

Step S2 middle controller is comprised the following steps by the position of the second motion adjustment receiver: radiation source continues the constant irradiation light of emissive porwer, controller controls receiver according to radiation source rotation direction and moves towards correspondence direction, and the irradiation light intensity that monitoring receiver receives, the position that the irradiation light intensity finally making receiver rest on to receive is maximum.

Step S3 middle controller control receiver moves to correspondence position and comprises the following steps: controller drives arc track to rotate respective angles according to the rotational angle of longitudinal rod by rotating mechanism.

In the present embodiment, add up the number N1=20 of white spectrum point and the number N2=52 of red spectrum point, $\left|\frac{N1}{72}\right|=28\%>20\%,\left|\frac{N2}{72}\right|=72\%<75\%,$ Judge that beef sample is snowflakes beef.

Claims (10)

1. one kind is detected the device of snowflakes beef fast, it is characterized in that: comprise controller and detection platform, described controller comprises CPU (central processing unit) (1), touch-screen (2), light source control module (3) and voice output module (29), described detection platform comprises base (4), described base (4) is provided with sample splint (6), described sample splint (6) is connected with base (4) by the first support column (24), the middle part of described sample splint (6) is provided with transparent window (7), described transparent window (7) top is provided with radiation source (8), described transparent window (7) below is provided with receiver (9), described base (4) is also provided with the first motion driving radiation source (8) movement and the second motion driving receiver (9) movement, described CPU (central processing unit) (1) respectively with touch-screen (2), light source control module (3), voice output module (29), receiver (9), first motion and the electrical connection of the second motion, described light source control module (3) is also electrically connected with radiation source (8).

2. the device of a kind of quick detection snowflakes beef according to claim 1, it is characterized in that: described first motion comprises elevating mechanism (10), transverse link (11), longitudinal rod (12), first drive motor (13) and the second drive motor (14), described elevating mechanism (10) is arranged on base (4), described transverse link (11) one end is connected with elevating mechanism (10), transverse link (11) other end is connected with the first drive motor (13), the rotating shaft of described first drive motor (13) straight down, the top of described longitudinal rod (12) is connected with the rotating shaft of the first drive motor (13), the bottom of described longitudinal rod (12) is connected with the second drive motor (14), the rotating shaft of described second drive motor (14) is horizontally disposed with, described radiation source (8) is connected with the rotating shaft of the second drive motor (14), the direction of illumination of radiation source (8) is towards transparent window (7), described elevating mechanism (10), first drive motor (13) and the second drive motor (14) are electrically connected with CPU (central processing unit) (1) respectively.

3. the device of a kind of quick detection snowflakes beef according to claim 2, it is characterized in that: described second motion comprises the rotating mechanism (15) be arranged on base (4) and the arc track (16) being arranged on rotating mechanism (15) top, described receiver (9) is arranged on arc track (16), the bottom surface of described arc track (16) is provided with two arc grooves be parallel to each other (17), arc groove is provided with curved tooth bar in (17), the bottom of described receiver (9) is provided with the 3rd drive motor (19) that two gears (18) and driven wheel (18) rotate, described two gears (18) are engaged with two tooth bars respectively, two sidewalls of described arc track (16) are arranged with curved stopper slot (20), the both sides of described receiver (9) are respectively equipped with the limited block (21) coordinated with stopper slot (20), described rotating mechanism (15) and the 3rd drive motor (19) are electrically connected with CPU (central processing unit) (1) respectively.

4. the device of a kind of quick detection snowflakes beef according to claim 1 or 2 or 3, it is characterized in that: described light source control module (3) comprises function memory (22) and power amplifier (23), the input end of described function memory (22) is electrically connected with CPU (central processing unit) (1), the output terminal of described function memory (22) is electrically connected with the input end of power amplifier (23), and the output terminal of described power amplifier (23) is electrically connected with radiation source (8).

5. the device of a kind of quick detection snowflakes beef according to claim 1 or 2 or 3, is characterized in that: the quartz glass that described transparent window (7) is 0.7mm-0.8mm.

6. the device of a kind of quick detection snowflakes beef according to claim 1 or 2 or 3, it is characterized in that: described elevating mechanism (10) comprises screw mandrel (25), support bar (26) and the four-wheel drive motor driving screw mandrel (25) to rotate, screw mandrel (25) and support bar (26) are vertically arranged on base (4), one end that transverse link (11) is connected with elevating mechanism (10) is provided with the thread bush (27) be set on screw mandrel (25) and the sleeve pipe (28) be set on support bar (26), four-wheel drive motor is electrically connected with CPU (central processing unit) (1).

7. the device of a kind of quick detection snowflakes beef according to claim 1 or 2 or 3, it is characterized in that: the 5th drive motor that described rotating mechanism (15) comprises the second support column (5) and drives the second support column (5) to rotate, second support column (5) is arranged on base (4), and the 5th drive motor is electrically connected with CPU (central processing unit) (1).

8. detect a method for snowflakes beef fast, it is characterized in that, comprise the following steps:

S1: preparation sheet beef sample, is placed on the transparent window place of sample splint by beef sample, what make beef sample is centrally located at immediately below longitudinal rod;

S2: controller controls radiation source by the second drive motor and rotates, the angle of radiation source and vertical direction is made to be 20-40 degree, controller is by the position of the second motion adjustment receiver, and receiver is received, and radiation source sends through the detection light of beef sample and transparent window;

S3: the detection light that controller sends certain light intensity by light source control module control radiation source is radiated on beef sample, detect light intensity and first rise to maximal value from 0 according to tangent cutve, then 0 is dropped to from maximal value according to sinusoidal curve, controller acquisition of transmission spectroscopic data Spect (t), then controller controls longitudinal rod by the first drive motor and rotates 5 degree, radiation source is made to horizontally rotate 5 degree, control receiver and move to correspondence position, gather the spectroscopic data of now radiation source point of irradiation, control radiation source horizontal rotary like this circles, often horizontally rotate 5 degree of detection spectroscopic datas that stop, thus on beef sample, gather spectroscopic data Spect (t) of 72 diverse locations,

S4: collect 72 spectroscopic datas Spect (t) are all carried out same data processing, calculates 72 signal to noise ratio (S/N ratio) eigenwerts, the data processing that each spectroscopic data Spect (t) is carried out is comprised the following steps:

Adopt input signal as input matrix, potential function V (x, t) and input signal are worked in coordination with as one deck accidental resonance model:

Wherein, V (x, t) is potential function, and x (t) is Brownian Particles movement locus function, and t is run duration, for periodic sinusoidal signal, N (t) grasps noise in being, A is signal amplitude, and f is signal frequency, and D is external noise intensity, and ξ (t) is external noise, for phase place,

Calculate V (x, t) for the first order derivative of x and second derivative, and make equation equal 0, obtain two layers of accidental resonance model:

Setting noise intensity D=0, spect (t)=0, N (t)=0, B=1, the critical value calculating A is by A _csubstitute in formula (1), and set x ₀(t)=0, sn ₀=0, adopt quadravalence jade for asking rain Ge Kuta Algorithm for Solving formula (1), obtain:

$x_{n+1}\left(t\right)=x_n\left(t\right)+1/6[{\left(k_1\right)}_n+(2-\sqrt{2}){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n],n=\mathrm{0,1},...,N-1---\left(3\right)$

Undetermined coefficient:

${\left(k_1\right)}_n=4({\mathrm{ax}}_{n-1}\left(t\right)-{\mathrm{bx}}_{n-1}^3\left(t\right)+{\mathrm{sn}}_{n-1})---\left(4\right)$

${\left(k_2\right)}_n=4[a(x_{n-1}\left(t\right)+\frac{{\left(k_1\right)}_{n-1}}{2})-b{(x_{n-1}\left(t\right)+\frac{{\left(k_1\right)}_{n-1}}{2})}^3+{\mathrm{sn}}_{n-1}]---\left(5\right)$

${\left(k_3\right)}_n=4[a(x_{n-1}\left(t\right)+\frac{{\left(k_2\right)}_{n-1}}{2})-b{(x_{n-1}\left(t\right)+\frac{\sqrt{2}-1}{2}{\left(k_1\right)}_{n-1}+\frac{2-\sqrt{2}}{2}{\left(k_2\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}]---\left(6\right)$

${\left(k_4\right)}_n=4[a(x_{n-1}\left(t\right)+{\left(k_3\right)}_{n-1})-b{(x_{n-1}\left(t\right)-\frac{\sqrt{2}}{2}{\left(k_2\right)}_{n-1}+\frac{2+\sqrt{2}}{2}{\left(k_3\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}]---\left(7\right)$

Wherein, x _nt n order derivative that () is x (t), sn _nbe the value of n order derivative at t=0 place of S (t), a, b are the constant of setting,

Calculate x ₁(t), x ₂(t) ... x _n+1t the value of (), to x ₁(t), x ₂(t) ... x _n+1t () is carried out integration and is obtained x _(t), and obtain x _(t)the position x in resonance moment is produced in the double-deck stochastic resonance system of one deck accidental resonance model and two layers of accidental resonance model composition _mvalue and x _mcorresponding resonance moment t1 and the noise D1 corresponding with t1, D1 are a value in D,

Pass through formula calculate signal to noise ratio (S/N ratio) eigenwert SNR _feature, wherein, Δ U=a ²/ 4b;

S5: by 72 the signal to noise ratio (S/N ratio) eigenwert SNR calculated _featurecompare, if SNR with the threshold value of setting respectively _feature>-68.74 judges that check point corresponding to this signal to noise ratio (S/N ratio) eigenwert is white spectrum point, if SNR _feature<-77.49 judges that check point corresponding to this signal to noise ratio (S/N ratio) eigenwert is red spectrum point;

S6: add up the number N1 of white spectrum point and the number N2 of red spectrum point, if and then judge that this beef is snowflakes beef, if and then judge that this beef is not snowflakes beef, otherwise jump to step S3, detection is re-started to beef sample.

9. the method for a kind of quick detection snowflakes beef according to claim 8, it is characterized in that, described step S2 middle controller is comprised the following steps by the position of the second motion adjustment receiver: radiation source continues the constant irradiation light of emissive porwer, controller controls receiver according to radiation source rotation direction and moves towards correspondence direction, and the irradiation light intensity that monitoring receiver receives, the position that the irradiation light intensity finally making receiver rest on to receive is maximum.

10. the method for a kind of quick detection snowflakes beef according to claim 8 or claim 9, it is characterized in that, described step S3 middle controller control receiver moves to correspondence position and comprises the following steps: controller drives arc track to rotate respective angles according to the rotational angle of longitudinal rod by rotating mechanism.