CN104089905A - Detection device and method for spliced beef - Google Patents

Abstract

The invention discloses a detection device and method for spliced beef. The device comprises a controller and a detection platform. The controller comprises a central processing unit, a touch screen and a light source control module. The detection platform comprises a pedestal and a lightproof cover body cooperating with the pedestal. The cover body is detachably connected to the pedestal. The top of the cover body is provided with a handle, and the pedestal is provided with a sample support plate, which is in connection with the pedestal through a first supporting column. The middle of the sample support plate is provided with a transparent window, an irradiation light source is disposed over the transparent window, and a receiver is disposed below the transparent window. The pedestal is also provided with a first motion mechanism driving the irradiation light source to move and a second motion mechanism driving the receiver to move. The central processing unit is respectively in electric connection with the touch screen, the light source control module, the receiver, the first motion mechanism and the second motion mechanism. The light source control module is also electrically connected to the irradiation light source. The device and the method provided by the invention can rapidly, simply and accurately detect whether beef is spliced beef.

Description

Splicing beef pick-up unit and method

Technical field

The present invention relates to food inspection technical field, relate in particular to a kind of splicing beef pick-up unit and method.

Background technology

Beef taste deliciousness, nutritious, mouthfeel is good, is first-class food materials.But because its production cost is higher, especially top grade beef piece, expensive.And splicing beef is spliced by the fragment beef of different sizes, not only mouthfeel is bad, and the beef clod of separate sources also can form pollution, formation food-safety problem each other.

China Patent Publication No. CN1603794, open day 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 optical fiber equipment, microprocessor, demonstration and pen recorder and rotatable objective table.Its weak point is whether this pick-up unit can not detect beef is splicing beef.

Summary of the invention

Whether the object of the invention is to overcome current beef pick-up unit, can not to detect beef be the technical matters of splicing beef, and a kind of splicing beef pick-up unit and method are provided, and whether it can detect beef quick, easy, is exactly splicing beef.

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

Splicing beef pick-up unit of the present invention, comprise controller and detection platform, described controller comprises CPU (central processing unit), touch-screen and light source control module, the light tight cover body that described detection platform comprises base and coordinates with base, described cover body and base removably connect, cover body top is provided with handle, 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, described transparent window top is provided with radiation source, described transparent window below is provided with receiver, on described base, be also provided with the first motion that drives radiation source to move and the second motion that drives receiver to move, described CPU (central processing unit) respectively with touch-screen, light source control module, receiver, the 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.When detection, beef sample to be measured is placed on to the transparent window place of sample splint.Then cover light tight cover body, eliminate external environment light intensity and disturb.CPU (central processing unit), by the first motion control radiation source motion, by the second motion control receiver motion, guarantees that receiver can receive the detection light through beef sample and transparent window that radiation source sends all the time.

Controller control radiation source rotates a circle with certain irradiating angle, often horizontally rotate 30 degree stop detect a spectroscopic data.While detecting spectroscopic data, the detection light intensity that radiation source sends first rises to maximal value from 0 according to straight line, then drops to 0 from maximal value according to sinusoidal curve.Receiver detects the transmitted intensity receiving, and sends it to controller, and controller carries out after respective handling detecting data, judges whether beef sample to be measured is splicing beef.

The principle of optical detection splicing beef: the beef lines of monoblock naturally continuously, orderliness is clear, color and luster is unified, water cut is close, and therefore its transmission absorption spectral signal with incident angle approaches, and can be used as the foundation of detection.And although the different fragments of splicing beef are through arrangement, gluing and surface treatment, but its inherent meat lines is also discontinuous, has overall tomography, and it is larger that color and luster differs, water cut is difficult to consistent, therefore can determine whether as splicing beef according to optical detecting method.

The present invention adopts the incident light that light intensity constantly changes to irradiate sample, at incident light intensity gradually in the large or change procedure that reduces, different groups are gradually large or reduce to the absorption of respective wavelength light, now the degree of absorption of group is in unsaturation, saturated diminuendo process, whether in transmitted light, comprise more detection information, be splicing thereby the detection signal that makes to obtain can symbolize beef more accurately.

As preferably, described the first motion comprises elevating mechanism, transverse link, longitudinal rod, the 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 the 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 the 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, the first drive motor and the second drive motor are electrically connected with CPU (central processing unit) respectively.

Elevating mechanism can drive transverse link lifting, moves thereby drive under radiation source in the vertical direction; The first drive motor can drive longitudinal rod to rotate, thereby drives radiation source to rotate in the horizontal direction; The second drive motor can drive radiation source to rotate at vertical direction.Controller is adjusted the position of radiation source and is sent the incident angle that detects light by elevating mechanism, the first drive motor and the second drive motor.

As preferably, described the second motion comprises the arc track that is arranged on the rotating mechanism on base and is 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 that are parallel to each other, in arc groove, be provided with curved tooth bar, 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, on two sidewalls of described arc track, be arranged with curved stopper slot, the both sides of described receiver are respectively equipped with the limited block coordinating 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, therefore as long as the correspondence position that receiver moves on arc track just can receive the detection light that radiation source sends.The 3rd drive motor can rotate by driven wheel, thereby receiver is moved on arc track, and limited block can limit the position of receiver, prevents that 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.The function information that function memory storage CPU (central processing unit) is sent, and send the detection light of varying strength by power amplifier control radiation source.

As preferably, the rotating shaft of described the first drive motor is provided with the first angular transducer, and the rotating shaft of described the second drive motor is provided with the second angular transducer, and described the first angular transducer and the second angular transducer are electrically connected with CPU (central processing unit) respectively.CPU (central processing unit) is monitored the rotational angle of the first drive motor rotating shaft by the first angular transducer, monitor the rotational angle of the second drive motor rotating shaft by the second angular transducer, guarantee the accuracy of the first drive motor rotational angle and the second drive motor rotational angle.

As preferably, described elevating mechanism comprises screw mandrel, support bar and the 4th drive motor that 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 and is set in the thread bush on screw mandrel and is set in the sleeve pipe on support bar, and the 4th drive motor is electrically connected with CPU (central processing unit).

As preferably, described rotating mechanism comprises the second support column and the 5th drive motor that drives the second support column to rotate, the second support column is arranged on base, the rotating shaft of described the 5th drive motor is provided with the 3rd angular transducer, and the 5th drive motor and the 3rd angle sensor are electrically connected with CPU (central processing unit) respectively.CPU (central processing unit), by the rotational angle of the 3rd angle Sensor monitoring the 5th drive motor rotating shaft, is guaranteed the accuracy of the 5th drive motor rotational angle.

Splicing beef detection method of the present invention, comprises the following steps:

S1: preparation sheet beef sample, beef sample is placed on to the transparent window place of sample splint, make beef sample be centered close to longitudinal rod under;

S2: controller rotates by the second drive motor control radiation source, the angle that makes radiation source and vertical direction is 20-40 degree, controller is adjusted the position of receiver by the second motion, make receiver can receive the detection light through beef sample and transparent window that radiation source sends;

S3: the detection irradiation that controller sends certain light intensity by light source control module control radiation source is on beef sample, detect light intensity and first rise to maximal value from 0 according to straight line, then drop to 0 from maximal value according to sinusoidal curve, controller acquisition of transmission spectroscopic data Spect (t), then controller rotates 30 degree by the first drive motor control longitudinal rod, make radiation source horizontally rotate 30 degree, control receiver and move to correspondence position, gather the now spectroscopic data of radiation source point of irradiation, so controlling radiation source horizontal rotary circles, often horizontally rotate 30 degree stop detect a spectroscopic data, thereby on beef sample, gather the spectroscopic data Spect (t) of 12 diverse locations,

S4: 12 the spectroscopic data Spect (t) that collect are all carried out to same data processing, calculate 12 signal to noise ratio (S/N ratio) eigenwerts, the data processing that each spectroscopic data Spect (t) is carried out comprises the following steps:

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

Wherein, V (x, t) is potential function, and x (t) is Brownian Particles movement locus function, and t is run duration, for periodicity 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 first order derivative and the second derivative of V (x, t) for x, and make equation equal 0, obtain two layers of accidental resonance model:

Set noise intensity D=0, spect (t)=0, N (t)=0, B=1, the critical value that calculates A is by A _cin substitution 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:

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

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, xn (t) is the n order derivative of x (t), sn _nbe the n order derivative of S (t) in the value at t=0 place, a, b be set constant,

Calculate x ₁(t), x ₂(t) ... X _n+1(t) value, to x ₁(t), x ₂(t) ... X _n+1(t) carry out integration and obtain x _(t), and obtain x _(t)double-deck stochastic resonance system at one deck accidental resonance model and two layers of accidental resonance model composition produces the position x in resonance moment _mvalue and l _mcorresponding resonance moment t1 and the noise D1 corresponding with t1, D1 is 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: 12 signal to noise ratio (S/N ratio) eigenwerts that calculate are divided into four groups, by SNR _{feature 3}, SNR _{feature 6}, SNR _{feature 9}, SNR _{feature 12}be divided into first group, by SNR _{feature 2}, SNR _{feature 4}, SNR _{feature 7}, SNR _{feature 11}be divided into second group, by SNR _{feature 1}and SNR _{feature 5}be divided into the 3rd group, by SNR _{feature 8}and SNR _{feature 10}be divided into the 4th group, and calculate respectively the signal to noise ratio (S/N ratio) mean value of each group, obtain SNR _{average 1}, SNR _{average 2}, SNR _{average 3}, SNR _{average 4},

Calculate the error QE between each signal to noise ratio (S/N ratio) eigenwert and its signal to noise ratio (S/N ratio) mean value of corresponding group _j, j=1 ..., 12;

Statistics meets QE _jthe number M of≤2% signal to noise ratio (S/N ratio) eigenwert ₁, statistics meets QE _jthe number M of the signal to noise ratio (S/N ratio) eigenwert of >2% ₂;

S6: if judge that this beef sample is not splicing beef, if judge that this beef sample is splicing beef, otherwise jump to step S3, beef sample is re-started to detection.

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

As preferably, before jumping to step S3 in described step S6, first carry out following steps: controller rotates by the second drive motor control radiation source, make the angle of radiation source and vertical direction increase 3 degree, controller is adjusted the position of receiver by the second motion, make receiver can receive the detection light through beef sample and transparent window that radiation source sends.

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

Brief description of the drawings

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

Fig. 2 is the structural representation of cover body;

Fig. 3 is the structural representation of the second motion of the present invention;

Fig. 4 is the sectional view of arc track of the present invention;

Fig. 5 is that circuit theory of the present invention connects block diagram;

The light intensity curve figure of the detection light that when Fig. 6 is detection, radiation source sends.

In figure: 1, CPU (central processing unit), 2, touch-screen, 3, light source control module, 4, base, 5, cover body, 6, sample splint, 7, transparent window, 8, radiation source, 9, receiver, 10, elevating mechanism, 11, transverse link, 12, longitudinal rod, 13, the first drive motor, 14, the second drive motor, 15, rotating mechanism, 16, arc track, 17, arc groove, 18, gear, 19, the 3rd drive motor, 20, stopper slot, 21, limited block, 22, function memory, 23, power amplifier, 24, the first support column, 25, screw mandrel, 26, support bar, 27, thread bush, 28, sleeve pipe, 29, the second support column, 30, handle, 31, the first angular transducer, 32, the second angular transducer.

Embodiment

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

Embodiment: the splicing beef pick-up unit of the present embodiment, as Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, comprise controller and detection platform, controller comprises CPU (central processing unit) 1, touch-screen 2 and light source control module 3, light source control module 3 comprises function memory 22 and power amplifier 23, the light tight cover body 5 that detection platform comprises base 4 and coordinates with base 4, cover body 5 removably connects with base 4, cover body 5 tops are provided with handle 30, 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, transparent window 7 tops are provided with radiation source 8, transparent window 7 belows are provided with receiver 9, on base 4, be also provided with the first motion that drives radiation source 8 to move and the second motion that drives receiver 9 to move.

The first motion comprises elevating mechanism 10, transverse link 11, longitudinal rod 12, the first drive motor 13 and the second drive motor 14, elevating mechanism 10 is arranged on base 4, transverse link 11 one end are connected with elevating mechanism 10, transverse link 11 other ends are 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, the rotating shaft of the first drive motor 13 is provided with the first angular transducer 31, the rotating shaft of the second drive motor 14 is provided with the second angular transducer 32.

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

As shown in Figure 5, CPU (central processing unit) 1 is electrically connected with the input end of touch-screen 2, receiver 9, elevating mechanism 10, the first drive motor 13, the second drive motor 14, rotating mechanism 15, the 3rd drive motor 19, the first angular transducer 31, the second angular transducer 32, 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.

The quartz glass that transparent window 7 is 0.6mm, radiation source 8 is Halogen lamp LED.Elevating mechanism comprises screw mandrel 25, support bar 26 and the 4th drive motor that 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 being set on screw mandrel 25 and sleeve pipe 28, the four drive motor that are set on support bar 26 are electrically connected with CPU (central processing unit) 1.Rotating mechanism 15 comprises the second support column 29 and the 5th drive motor that drives the second support column 29 to rotate, the second support column 29 is arranged on base 4, the rotating shaft of the 5th drive motor is provided with the 3rd angular transducer, and the 5th drive motor and the 3rd angle sensor are electrically connected with CPU (central processing unit) 1 respectively.

Elevating mechanism 10 can drive transverse link 11 liftings, moves thereby drive under radiation source 8 in the vertical directions; The first drive motor 13 can drive longitudinal rod 12 to rotate, thereby drives radiation source 8 to rotate in the horizontal direction; The second drive motor 14 can drive radiation source 8 to rotate at vertical direction.Controller is adjusted the position of radiation source 8 by elevating mechanism 10, the first drive motor 13 and the second drive motor 14 and is sent the incident angle that detects light.

CPU (central processing unit) 1 is monitored the rotational angle of the first drive motor 13 rotating shafts by the first angular transducer 31, monitor the rotational angle of the second drive motor 14 rotating shafts by the second angular transducer 32, by the rotational angle of the 3rd angle Sensor monitoring the 5th drive motor rotating shaft, guarantee the accuracy of the first drive motor 13 rotational angles, the second drive motor 14 rotational angles and the 5th drive motor rotational angle.

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, therefore as long as the correspondence position that receiver 9 moves on arc track 16 just can receive the detection light that radiation source 8 sends.The 3rd drive motor 19 can rotate by driven wheel 18, thereby receiver 9 is moved on arc track 16, and limited block 21 can limit the position of receiver 9, prevents that receiver 9 from leaving arc track 16.Function memory 22 is stored the function information that CPU (central processing unit) 1 is sent, and is controlled radiation source 8 and sent the detection light of varying strength by power amplifier 23.

When detection, beef sample to be measured is placed on to transparent window 7 places of sample splint 6.Then cover light tight cover body 5, eliminate external environment light intensity and disturb.CPU (central processing unit) 1 is moved by the first motion control radiation source 8, moves by the second motion control receiver 9, guarantees that receiver 9 can receive the detection light through beef sample and transparent window 7 that radiation source 8 sends all the time.

Controller control radiation source 8 rotates a circle with certain irradiating angle, often horizontally rotate 30 degree stop detect a spectroscopic data.While detecting spectroscopic data, the detection light intensity that radiation source 8 sends first rises to maximal value from 0 according to straight line, then drops to 0 from maximal value according to sinusoidal curve, as shown in Figure 6.Receiver 9 detects the transmitted intensity receiving, and sends it to controller, and controller carries out after respective handling detecting data, judges whether beef sample to be measured is splicing beef.

The principle of optical detection splicing beef: the beef lines of monoblock naturally continuously, orderliness is clear, color and luster is unified, water cut is close, and therefore its transmission absorption spectral signal with incident angle approaches, and can be used as the foundation of detection.And although the different fragments of splicing beef are through arrangement, gluing and surface treatment, but its inherent meat lines is also discontinuous, has overall tomography, and it is larger that color and luster differs, water cut is difficult to consistent, therefore can determine whether as splicing beef according to optical detecting method.

The present invention adopts the incident light that light intensity constantly changes to irradiate sample, at incident light intensity gradually in the large or change procedure that reduces, different groups are gradually large or reduce to the absorption of respective wavelength light, now the degree of absorption of group is in unsaturation, saturated diminuendo process, whether in transmitted light, comprise more detection information, be splicing thereby the detection signal that makes to obtain can symbolize beef more accurately.

The splicing beef detection method of the present embodiment, comprises the following steps:

S1: prepare the beef sample that thickness is 1mm-2mm, beef sample be placed on to the transparent window place of sample splint, make beef sample be centered close to longitudinal rod under;

S2: controller rotates by the second drive motor control radiation source, the angle that makes radiation source and vertical direction is 25 degree, controller is adjusted the position of receiver by the second motion, make receiver can receive the detection light through beef sample and transparent window that radiation source sends;

S3: the detection irradiation that controller sends certain light intensity by light source control module control radiation source is on beef sample, detect light intensity and first rise to maximal value from 0 according to straight line, then drop to 0 from maximal value according to sinusoidal curve, controller acquisition of transmission spectroscopic data Spect (t), then controller rotates 30 degree by the first drive motor control longitudinal rod, make radiation source horizontally rotate 30 degree, control receiver and move to correspondence position, gather the now spectroscopic data of radiation source point of irradiation, so controlling radiation source horizontal rotary circles, often horizontally rotate 30 degree stop detect a spectroscopic data, thereby on beef sample, gather the spectroscopic data Spect (t) of 12 diverse locations,

S4: 12 the spectroscopic data Spect (t) that collect are all carried out to same data processing, calculate 12 signal to noise ratio (S/N ratio) eigenwerts, the data processing that each spectroscopic data Spect (t) is carried out comprises the following steps:

Adopt input signal as input matrix,

Under adiabatic approximation condition, suppose signal amplitude minimum (A<<1), bistable system is not in the situation that there is no enough energy drives, Brownian movement particle is offset in a side potential well, signal period is more than the interior system relaxation time length of some typical potential wells, the now appearance of cyclic drive power makes potential function run-off the straight, finally cause the transition of Brownian movement particle from a potential well to another one potential well, therefore potential function V (x, t) works in coordination with as one deck accidental resonance model with input signal:

Wherein, V (x, t) is potential function, and x (t) is Brownian Particles movement locus function, and t is run duration, for periodicity 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 first order derivative and the second derivative of V (x, t) for x, and make equation equal 0, obtain two layers of accidental resonance model:

Set noise intensity D=0, spect (t)=0, N (t)=0, B=1, the critical value that calculates A is at A<A _csituation under, Brownian movement particle is hovered in left and right, its original position, can not realize two transition between potential well, but particle is in the situation that 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 _cin substitution 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: $x_{n+1}\left(t\right)=x_n\left(t\right)+1/6[{\left(k_1\right)}_n+(2-\sqrt{2}1){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n],$ n=0，1，…，N-1(3)

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 _n(t) be the n order derivative of x (t), sn _nbe the n order derivative of S (t) in the value at t=0 place, a, b be set constant,

Calculate x ₁(t), x ₂(t) ... x _n+1(t) value, to x ₁(t), x ₂(t) ... x _n+1(t) carry out integration and obtain x _(t), and obtain t _(t)double-deck stochastic resonance system at one deck accidental resonance model and two layers of accidental resonance model composition produces the position x in resonance moment _mvalue and x _mcorresponding resonance moment t1 and the noise D1 corresponding with t1, D1 is 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: 12 signal to noise ratio (S/N ratio) eigenwerts that calculate are divided into four groups, by SNR _{feature 3}, SNR _{feature 6}, SNR _{feature 9}, SNR _{feature 12}be divided into first group, by SNR _{feature 2}, SNR _{feature 4}, SNR _{feature 7}, SNR _{feature 11}be divided into second group, by SNR _{feature 1}and SNR _{feature 5}be divided into the 3rd group, by SNR _{feature 8}and SNR _{feature 10}be divided into the 4th group, and calculate respectively the signal to noise ratio (S/N ratio) mean value of each group, obtain SNR _{average 1}, SNR _{average 2}, SNR _{average 3}, SNR _{average 4},

Calculate the error QE between each signal to noise ratio (S/N ratio) eigenwert and its signal to noise ratio (S/N ratio) mean value of corresponding group _j, j=1 ..., 12;

Statistics meets QE _jthe number M of≤2% signal to noise ratio (S/N ratio) eigenwert ₁, statistics meets QE _jthe number M of the signal to noise ratio (S/N ratio) eigenwert of >2% ₂;

S6: if judge that this beef sample is not splicing beef, if judge that this beef sample is splicing beef, otherwise execution step S7;

S7: controller rotates by the second drive motor control radiation source, make the angle of radiation source and vertical direction increase 3 degree, controller is adjusted the position of receiver by the second motion, make receiver can receive the detection light through beef sample and transparent window that radiation source sends, then jump to step S3, beef sample is re-started to detection.

The position that step S2 middle controller is adjusted receiver by the second motion comprises the following steps: radiation source continues the constant light irradiation of emissive porwer, controller moves towards correspondence direction according to radiation source rotation direction control receiver, and the light irradiation intensity that receives of monitoring receiver, the position of the light irradiation intensity maximum that finally makes receiver rest on to receive.

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, meet QE through detecting _jthe number M of≤2% signal to noise ratio (S/N ratio) eigenwert ₁=1, statistics meets QE _jthe number of the signal to noise ratio (S/N ratio) eigenwert of >2% is M ₂=11, judge that beef sample is splicing beef.

Claims (10)

1. a splicing beef pick-up unit, it is characterized in that: comprise controller and detection platform, described controller comprises CPU (central processing unit) (1), touch-screen (2) and light source control module (3), the light tight cover body (5) that described detection platform comprises base (4) and coordinates with base (4), described cover body (5) removably connects with base (4), cover body (5) top is provided with handle (30), 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), on described base (4), be also provided with and drive the first mobile motion of radiation source (8) and drive the second mobile motion of receiver (9), described CPU (central processing unit) (1) respectively with touch-screen (2), light source control module (3), receiver (9), the 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. splicing beef pick-up unit according to claim 1, it is characterized in that: described the first motion comprises elevating mechanism (10), transverse link (11), longitudinal rod (12), the 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 the 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 the 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), the first drive motor (13) and the second drive motor (14) are electrically connected with CPU (central processing unit) (1) respectively.

3. splicing beef pick-up unit according to claim 2, it is characterized in that: described the second motion comprises the rotating mechanism (15) being arranged on base (4) and is arranged on the arc track (16) at 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 that are 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) of two gears (18) and driven wheel (18) rotation, described two gears (18) engage with two tooth bars respectively, on two sidewalls of described arc track (16), be arranged with curved stopper slot (20), the both sides of described receiver (9) are respectively equipped with the limited block (21) coordinating 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. according to the splicing beef pick-up unit described in 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. according to the splicing beef pick-up unit described in claim 2 or 3, it is characterized in that: the rotating shaft of described the first drive motor (13) is provided with the first angular transducer (31), the rotating shaft of described the second drive motor (14) is provided with the second angular transducer (32), and described the first angular transducer (31) and the second angular transducer (32) are electrically connected with CPU (central processing unit) (1) respectively.

6. according to the splicing beef pick-up unit described in claim 1 or 2 or 3, it is characterized in that: described elevating mechanism (10) comprises screw mandrel (25), support bar (26) and the 4th drive motor that 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) being set on screw mandrel (25) and is set in the sleeve pipe (28) on support bar (26), the 4th drive motor is electrically connected with CPU (central processing unit) (1).

7. according to the splicing beef pick-up unit described in claim 1 or 2 or 3, it is characterized in that: described rotating mechanism (15) comprises the second support column (29) and the 5th drive motor that drives the second support column (29) to rotate, the second support column (29) is arranged on base (4), the rotating shaft of described the 5th drive motor is provided with the 3rd angular transducer, and the 5th drive motor and the 3rd angle sensor are electrically connected with CPU (central processing unit) (1) respectively.

8. a splicing beef detection method, is characterized in that, comprises the following steps:

S1: preparation sheet beef sample, beef sample is placed on to the transparent window place of sample splint, make beef sample be centered close to longitudinal rod under;

S2: controller rotates by the second drive motor control radiation source, the angle that makes radiation source and vertical direction is 20-40 degree, controller is adjusted the position of receiver by the second motion, make receiver can receive the detection light through beef sample and transparent window that radiation source sends;

S3: the detection irradiation that controller sends certain light intensity by light source control module control radiation source is on beef sample, detect light intensity and first rise to maximal value from 0 according to straight line, then drop to 0 from maximal value according to sinusoidal curve, controller acquisition of transmission spectroscopic data Spect (t), then controller rotates 30 degree by the first drive motor control longitudinal rod, make radiation source horizontally rotate 30 degree, control receiver and move to correspondence position, gather the now spectroscopic data of radiation source point of irradiation, so controlling radiation source horizontal rotary circles, often horizontally rotate 30 degree stop detect a spectroscopic data, thereby on beef sample, gather the spectroscopic data Spect (t) of 12 diverse locations,

S4: 12 the spectroscopic data Spect (t) that collect are all carried out to same data processing, calculate 12 signal to noise ratio (S/N ratio) eigenwerts, the data processing that each spectroscopic data Spect (t) is carried out comprises the following steps:

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

Wherein, V (x, t) is potential function, and x (t) is Brownian Particles movement locus function, and t is run duration, for periodicity 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 first order derivative and the second derivative of V (x, t) for x, and make equation equal 0, obtain two layers of accidental resonance model:

Set noise intensity D=0, spect (t)=0, N (t)=0, B=1, the critical value that calculates A is by A _cin substitution 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:

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

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 _n(t) be the n order derivative of x (t), sn _nbe the n order derivative of S (t) in the value at t=0 place, a, b be set constant,

Calculate x ₁(t), x ₂(t) ... X _n+1(t) value, to x ₁(t), x ₂(t) ... X _n+1(t) carry out integration and obtain x (t), and obtain the position x of x (t) in the double-deck stochastic resonance system generation resonance moment 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 is 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: 12 signal to noise ratio (S/N ratio) eigenwerts that calculate are divided into four groups, by SNR _{feature 3}, SNR _{feature 6}, SNR _{feature 9}, SNR _{feature 12}be divided into first group, by SNR _{feature 2}, SNR _{feature 4}, SNR _{feature 7}, SNR _{feature 11}be divided into second group, by SNR _{feature 1}and SNR _{feature 5}be divided into the 3rd group, by SNR _{feature 8}and SNR _{feature 10}be divided into the 4th group, and calculate respectively the signal to noise ratio (S/N ratio) mean value of each group, obtain SNR _{average 1}, SNR _{average 2}, SNR _{average 3}, SNR _{average 4},

Calculate the error QE between each signal to noise ratio (S/N ratio) eigenwert and its signal to noise ratio (S/N ratio) mean value of corresponding group _j, j=1 ..., 12;

Statistics meets QE _jthe number M of≤2% signal to noise ratio (S/N ratio) eigenwert ₁, statistics meets QE _jthe number M of the signal to noise ratio (S/N ratio) eigenwert of >2% ₂;

S6: if judge that this beef sample is not splicing beef, if judge that this beef sample is splicing beef, otherwise jump to step S3, beef sample is re-started to detection.

9. splicing beef detection method according to claim 8, it is characterized in that, the position that described step S2 middle controller is adjusted receiver by the second motion comprises the following steps: radiation source continues the constant light irradiation of emissive porwer, controller moves towards correspondence direction according to radiation source rotation direction control receiver, and the light irradiation intensity that receives of monitoring receiver, the position of the light irradiation intensity maximum that finally makes receiver rest on to receive.

10. splicing beef detection method according to claim 8 or claim 9, it is characterized in that, before jumping to step S3 in described step S6, first carry out following steps: controller rotates by the second drive motor control radiation source, make the angle of radiation source and vertical direction increase 3 degree, controller is adjusted the position of receiver by the second motion, make receiver can receive the detection light through beef sample and transparent window that radiation source sends.