CN104374703B - Snow beef rapid detection system and method - Google Patents

Abstract

The invention discloses a snow beef rapid detection system and method. The system includes a controller and a detection mechanism, the detection mechanism comprises a base, the base is provided with a detection platform, a rectangular groove is arranged in the middle of the detection platform, a liquid is stored in the rectangular groove, a sample tray is arranged above the liquid, the sample tray is provided with a first permanent magnet and a second permanent magnet, the bottom of the sample tray is provided with a positioning column, the bottom of the positioning column is provided with a positioning head, the front inner side face of the rectangular groove is provided with a first electromagnet and a first proximity switch, the rear inner side face of the rectangular groove is provided with a second electromagnet, the bottom surface of the rectangular groove is provided with a first drive motor and a plurality of positioning blocks, the first drive motor is connected through a transmission mechanism with the positioning blocks, the positioning blocks are provided with angle sensors, the positioning blocks are also provided with positioning holes, third electromagnets and second proximity switches are arranged at the bottom of the positioning holes, and an optical transceiver is arranged above the sample tray. The snow beef rapid detection system can fast, conveniently and accurately detect whether beef is snow beef.

Description

The system and method for one quick detection snowflakes beef

Technical field

The present invention relates to technical field of food detection, the system and method for more particularly, to one quick detection snowflakes beef.

Background technology

Top grade beef refers to make the high quality beef of international luxury food it is desirable to muscle fiber is delicate, succulence, contains between muscle A certain amount of fat, lipochondrion is tiny, is evenly distributed in muscular tissue, becomes marble grain, is commonly called as " snowflakes beef ".Mesh Before, snowflakes beef is typically judged by people's naked eyes, judges not accurate enough, and human error easily.

China Patent Publication No. cn1603794, in publication date on April 6th, 2005, the entitled near infrared technology of invention is quick Detection tenderness of beef utilizing method and apparatus, this application case disclose a kind of method of rapidly detecting tenderness of beef utilizing near infrared technology and Device, it by near-infrared light source, near infrared detector, diffuse-reflectance fiber plant, microprocessor, display and recording equipment and can turn Dynamic object stage forms.Its weak point is that this detection means can not detect whether beef is snowflakes beef.

Content of the invention

The purpose of the present invention is to overcome current beef detecting system can not detect that whether beef be that the technology of snowflakes beef is asked Topic, there is provided the system and method for a quick detection snowflakes beef, its can quickly, simplicity, whether detect beef exactly For snowflakes beef.

In order to solve the above problems, the present invention employs the following technical solutions and is achieved:

The system of the one quick detection snowflakes beef of the present invention, including controller and testing agency, described controller includes CPU, touch screen and light source control module, described testing agency includes base, and described base is provided with monitor station, It is provided with rectangular recess in the middle part of described monitor station, in described rectangular recess, stores liquid, described liquid is provided with rounded sample Product pallet, the front-end and back-end of described sample tray are respectively equipped with the first permanent magnet and the second permanent magnet, described sample tray bottom Portion is provided with locating dowel, and described positioning column bottom is provided with positioning head, and described positioning head is made up of ferrimagnet, described rectangular recess Anteromedial surface be provided with the first electric magnet and the first proximity switch, the rear medial surface of described rectangular recess is provided with the second electric magnet, The bottom surface of described rectangular recess is provided with the first motor and several rotatable locating pieces, and described first motor passes through Drive mechanism is connected with locating piece, and described locating piece is provided with angular transducer, and described locating piece is provided with and positioning head cooperation And limiting the freely rotatable location hole of positioning head, the location hole on several locating pieces described is arranged in a linear from front to back, institute State location hole bottom and be provided with the 3rd electric magnet and the second proximity switch, be provided with optical transceiver above described sample tray, described light Transceiver includes radiation source and optical receiver, described CPU respectively with touch screen, light source control module, first electricity Magnet, the second electric magnet, the 3rd electric magnet, the first proximity switch, the second proximity switch, the first motor, optical receiver and Angular transducer electrically connects, and described light source control module is also electrically connected with radiation source.

In the technical program, radiation source is Halogen light or generating laser.During detection, beef sample to be measured is placed On sample tray, beef sample is made to be centrally located at the center of sample tray.

Central processing unit controls first work of electromagnet, the first electric magnet produces suction, and first on sample tray is forever Magnet is acted on by the first electromagnet suction, and sample tray moves to the anteromedial surface of rectangular recess, and the first permanent magnet is inhaled simultaneously Just to the first electric magnet, the position calibrating positioning head is it is ensured that positioning head is inserted into location hole for power effect.Interior about rectangular recess The distance between side wall is more bigger than the diameter of sample tray, makes sample tray be merely able to move forward and backward it is ensured that positioning head is in positioning The straight line upper direction that hole is arranged in, is easy to positioning head insertion location hole.When sample tray moves to rectangular recess anteromedial surface During place, the first proximity switch sends trigger, and CPU receives the trigger that the first proximity switch sends, control Make the first electric magnet to quit work, the 3rd electromagnetism ironworker of the nearest location hole bottom of command range rectangular recess anteromedial surface Make, the 3rd electric magnet produces suction, the positioning head of sample tray bottom is inserted this location hole by the suction of the 3rd electric magnet, Second proximity switch of this positioning in the hole sends trigger.CPU receives trigger, judgement sample pallet Position successfully, now the central point of sample tray is located at the underface of optical transceiver.

User can select sample tray to need the position of positioning hole of insertion by touch screen.Central processing unit controls distance 3rd electric magnet of the nearest location hole bottom of rectangular recess anteromedial surface quits work, and sample tray is floated by buoyancy, The positioning head of sample tray bottom leaves location hole.Central processing unit controls second electric magnet and sample tray need to insert Location hole bottom the 3rd work of electromagnet, the second permanent magnet on sample tray acted on by the second electromagnet suction, sample Pallet moves to the rear medial surface of rectangular recess.When above sample tray moving to the location hole needing to insert, sample tray The positioning head of lower section is acted on by the 3rd electromagnet suction, and the positioning head of sample tray bottom inserts this location hole, this positioning in the hole The second proximity switch send trigger.CPU receives trigger, and judgement sample pallet is successively inserted into use The location hole that family selects.Sample tray moves forward and backward in a liquid, no frictional dissipation, realizes being accurately positioned by location hole.

Angular transducer detects the angle that locating piece rotates.The location hole institute of central processing unit controls sample tray insertion Locating piece rotate a circle, often horizontally rotate 5 degree stop detection spectroscopic datas.During detection spectroscopic data, radiation source The intensity curve of the detection light sending first rises to maximum from 0 according to sine curve, then from maximum according to sine curve Drop to 0.The intensity of reflected light that optical receiver detection receives, and send it to CPU, CPU Detection data is carried out after respective handling, judge whether beef sample to be measured is snowflakes beef.

The present invention is the incident illumination irradiating sample being continually changing using light intensity, gradually big or reduce in the intensity of incident illumination Change procedure in, different groups are gradually big to the absorption of respective wavelength light or reduce, now at the degree of absorption of group During unsaturation, saturation diminuendo, in reflected light, comprise more detection informations, thus enabling the detection signal obtaining more Accurately symbolize whether beef is snowflakes beef.

Preferably, described positioning head is in flat, the longitudinal section of described positioning head is in inverted isosceles trapezoid, described fixed The shape in position hole and the form fit of positioning head, described location hole top is provided with the spigot surface of inclination.Location hole is along from front to back Direction is arranged, and the spigot surface of the left and right sides at location hole top play the guiding role, and is easy to positioning head insertion location hole.

Preferably, the distance between medial wall and the diameter of sample tray match about described rectangular recess.Rectangle About groove, the distance between medial wall is more bigger than the diameter of sample tray, makes sample tray be merely able to move forward and backward it is ensured that determining The straight line upper direction that potential head is arranged in location hole, is easy to positioning head insertion location hole.

Preferably, described light source control module includes the digital capture card of ni and power amplifier, described ni is digital to be adopted The input of truck is electrically connected with CPU, the outfan of the digital capture card of described ni and the input of power amplifier Electrical connection, the outfan of described power amplifier is electrically connected with radiation source.Ni digital capture card collection CPU is sent out The control signal going out, and control radiation source to send the detection light of varying strength by power amplifier.

Preferably, be located at light apart from the nearest location hole of rectangular recess anteromedial surface on described rectangular recess bottom surface receiving and dispatching The underface of device.It is used for the initial alignment of sample tray, the determining of foremost apart from the nearest location hole of rectangular recess anteromedial surface The distance between position hole and rearmost location hole are the radius of sample tray.

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

S1: preparation lamellar beef sample, beef sample is placed on sample tray, makes beef sample be centrally located at sample The center of product pallet；

The instruction that s2: CPU is inputted by touch screen according to user, controls sample tray insertion user to specify Location hole；

S3: CPU controls the detection light that radiation source sends certain light intensity to be radiated at by light source control module On beef sample, detection light intensity first rises to maximum from 0 according to sine curve, then from maximum according to sinusoidal bent Line drops to 0, and optical receiver gathers reflected spectrum data spect (t), then central processing unit controls the first motor work Make, the first motor controls locating piece to rotate 5 degree, make sample tray horizontally rotate 5 degree, optical receiver collection now irradiation light The spectroscopic data of source point of irradiation, so controls sample tray to horizontally rotate 360 degree, often horizontally rotates 5 degree of detection once light that stop Modal data, thus gather spectroscopic data spect (t) of 72 diverse locations on beef sample；

Collect 72 spectroscopic datas spect (t) are all carried out same data processing by s4: CPU, meter Calculate 72 signal to noise ratio eigenvalues, the data processing that each spectroscopic data spect (t) is carried out comprises the following steps:

Using input signalAs input matrix, potential function v (x, t, α) work in coordination with as one layer of accidental resonance model with input signal:

Wherein, v (x, t, α) is potential function, and x (t) is Brownian Particles movement locus function, and t is movement time,For periodic sinusoidal signal, n (t) be interior grasp noise, a is signal amplitude, and f is signal frequency, and d is outer making an uproar Sound intensity, ξ (t) is outer noise,For phase place,

Calculate v (x, t, α) for the first derivative of x (t), second dervative and three order derivatives, and make equation be equal to 0, obtain To two layers of accidental resonance model:

Set noise intensity d=0,Spect (t)=0, n (t)=0, it is calculated the marginal value of a ForBy a_cSubstitute in one layer of accidental resonance model, and set x₀(t)=0, sn₀=0, using quadravalence jade for asking rain lattice One layer of accidental resonance model of storehouse tower Algorithm for Solving, obtains:

$\begin{array}{c}{x}_{n+1}\left(t\right)=x_n+1/6[{\left(k_1\right)}_n+(2-\sqrt{2}){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n]\\ n=\mathrm{0,1},...,n-1\end{array},---\left(3\right)$

Wherein, undetermined coefficient:

${\left(k_1\right)}_n=a{\left({\mathrm{\αx}}_{n-1}\left(t\right)\right)}^2-b{\left({\mathrm{\αx}}_{n-1}\left(t\right)\right)}^3+{\mathrm{sn}}_{n-1}---\left(4\right)$

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

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

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

Wherein, x_nT () is the n order derivative of x (t), sn_nIt is the value at t=0 for the n order derivative of s (t), a, b are set normal Number,

It is calculated x₁(t), x₂(t)…x_n+1T the value of (), to x₁(t), x₂(t)…x_n+1T () is integrated obtaining x (t), And obtain the double-deck stochastic resonance system generation resonance in one layer of accidental resonance model and two layers of accidental resonance model composition for the x (t) The position x in moment_mValue and x_mCorresponding resonance moment t1 acceleration of motion α 1 corresponding with t1 and corresponding with t1 Noise d1, d1 are one of d value,

By formula $\mathrm{snr}=\sqrt{2}{\left(\mathrm{\δu}\frac{{4a}^3/27b}{d_1}\right)}^2{e}^{{-\left(\mathrm{\δu}\right)}^2/d_1},$ It is calculated signal to noise ratio eigenvalue snr_Feature, wherein, δ u=a²/4b；

S5: by calculate 72 signal to noise ratio eigenvalue snr_FeatureCompare with the threshold value setting respectively, if snr_Feature＞- 68.74 judge this corresponding test point of signal to noise ratio eigenvalue for white spectrum point, if snr_Feature＜ -77.49 judges this signal to noise ratio The corresponding test point of eigenvalue is red spectrum point；

White number n1 of spectrum point of s6: statistics and number n2 of red spectrum point, ifAndThen judge that this beef sample is snowflakes beef, otherwise judge that this beef sample is not snowflakes beef.

Preferably, described step s2 comprises the following steps:

S21: central processing unit controls first work of electromagnet, sample tray is arrived by the first electromagnet suction action At rectangular recess anteromedial surface, the first proximity switch sends trigger；

S22: CPU receives the trigger that the first proximity switch sends, and controls the first electric magnet to stop work Make, the 3rd work of electromagnet of the nearest location hole bottom of command range rectangular recess anteromedial surface, the 3rd electric magnet produces to be inhaled Power, the positioning head of sample tray bottom is inserted this location hole by the suction of the 3rd electric magnet, and the second of this positioning in the hole connects Nearly switch sends trigger；

S23: CPU receives the trigger that the second proximity switch sends, and judgement sample pallet is positioned to Work(, now the central point of sample tray is positioned at the underface of optical transceiver；

S24: CPU reads user and determines that sample tray needs determining of insertion by the instruction that touch screen inputs Position hole site；

S25: central processing unit controls are apart from the 3rd electric magnet of the nearest location hole bottom of rectangular recess anteromedial surface Quit work, sample tray is floated by buoyancy, the positioning head of sample tray bottom leaves location hole；

The 3rd of the location hole bottom of s26: central processing unit controls second electric magnet and sample tray needs insertion Work of electromagnet, the positioning head of sample tray bottom inserts this location hole, and the second proximity switch of this positioning in the hole sends triggering Signal.

The substantial effect of the present invention is: (1) can quickly, easy, detect whether beef is snowflakes beef exactly. (2) sample tray moves forward and backward in a liquid, no frictional dissipation, realizes being accurately positioned by location hole.

Brief description

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

Fig. 2 is the structural representation of rectangular recess；

Fig. 3 is the structural representation of rectangular recess and sample tray；

Fig. 4 is the sectional view of Fig. 3；

Fig. 5 is the structural representation of location hole；

Fig. 6 is that the circuit theory of the present invention connects block diagram；

Fig. 7 is the light intensity curve figure of the detection light that radiation source sends during detection.

In figure: 1, CPU, 2, touch screen, 3, light source control module, 4, base, 5, monitor station, 6, rectangle recessed Groove, 7, sample tray, the 8, first permanent magnet, the 9, second permanent magnet, 10, locating dowel, 11, positioning head, the 12, first electric magnet, 13, Second electric magnet, 14, locating piece, the 15, first motor, 16, location hole, the 17, the 3rd electric magnet, the 18, first proximity switch, 19th, optical transceiver, 20, radiation source, 21, optical receiver, 22, elevating mechanism, 23, spigot surface, 24, the digital capture card of ni, 25th, power amplifier, 26, photographic head, 27, transverse link, 28, longitudinal rod, 29, screw mandrel, 30, support bar, 31, thread bush, 32, Sleeve pipe, the 33, second proximity switch, 34, angular transducer.

Specific embodiment

Below by embodiment, and combine accompanying drawing, technical scheme is described in further detail.

Embodiment: the system of a quick detection snowflakes beef of the present embodiment, as shown in Figure 1, Figure 2, Figure 3, Figure 4, including Controller and testing agency, controller includes CPU 1, touch screen 2 and light source control module 3, and testing agency includes Base 4, base 4 is provided with monitor station 5, is provided with rectangular recess 6, stores liquid, liquid in rectangular recess 6 in the middle part of monitor station 5 It is provided with rounded sample tray 7, the front-end and back-end of sample tray 7 are respectively equipped with the first permanent magnet and the second permanent magnet, Sample tray 7 bottom is provided with locating dowel 10, and locating dowel 10 bottom is provided with positioning head 11, and positioning head 11 is made up of ferrimagnet, The anteromedial surface of rectangular recess 6 is provided with the first electric magnet 12 and the first proximity switch 18, and the rear medial surface of rectangular recess 6 is provided with Two electric magnet 13, the bottom surface of rectangular recess 6 is provided with the first motor 15 and seven rotatable locating pieces 14, and first drives electricity Machine 15 is connected with locating piece 14 by drive mechanism, and locating piece 14 is provided with angular transducer 34, and locating piece 14 is provided with and determines Potential head 11 coordinates and limits the freely rotatable location hole of positioning head 11 16, and the location hole 16 on seven locating pieces 14 is in from front to back Linear array, location hole 16 bottom is provided with the 3rd electric magnet 17 and the second proximity switch 33, is provided with light transmitting-receiving above sample tray 7 Device 19, optical transceiver 19 includes radiation source 20 and optical receiver 21, base 4 is additionally provided with drive optical transceiver 19 and moves up and down Elevating mechanism 22.

As shown in fig. 6, light source control module 3 includes the digital capture card of ni 24 and power amplifier 25, above rectangular recess 6 Be additionally provided with photographic head 26, photographic head 26 is connected with elevating mechanism 22 by connector, CPU 1 respectively with touch screen 2, First electric magnet 12, the second electric magnet 13, the 3rd electric magnet 17, the first proximity switch 18, the second proximity switch 33, first drive Motor 15, optical receiver 21, angular transducer 34, elevating mechanism 22, photographic head 26, the input electricity of the digital capture card of ni 24 Connect, the outfan of the digital capture card of ni 24 electrically connects with the input of power amplifier 25, the outfan of power amplifier 25 and Radiation source 20 electrically connects.

Elevating mechanism 22 includes transverse link 27, longitudinal rod 28, screw mandrel 29, support bar 30 and drive screw 29 and rotates The second motor, screw mandrel 29 and support bar 30 be vertically arranged on base 4, and transverse link 27 one end is provided with and is set in screw mandrel Thread bush 31 on 29 and be set in sleeve pipe 32, described transverse link 27 other end and longitudinal rod 28 on support bar 30 Top is connected, and described optical transceiver 19 is arranged on the bottom of longitudinal rod 28, the direction of illumination of radiation source 20 straight down, the Two motors are electrically connected with CPU 1.CPU 1 can adjust optical transceiver 29 by elevating mechanism 22 Upper-lower position, to meet the detection height of needs.

Drive mechanism includes being arranged on the travelling gear of each locating piece 14 bottom, is arranged on the first motor 15 rotating shaft On travelling gear and the tooth bar engaging with travelling gear.During the rotating shaft rotating of the first motor 15, move before and after tooth bar Dynamic, seven locating pieces 14 travelling gear in its bottom drives similarly hereinafter step to rotate, angular transducer 34 installed therein one fixed On the block 14 of position, for detecting the rotational angle of locating piece 14.

Positioning head 11 is in flat.The longitudinal section of positioning head 11 is in inverted isosceles trapezoid, the shape of location hole 16 with fixed The form fit of potential head 11, as shown in figure 5, location hole 16 top is respectively arranged on the left side and the right side the spigot surface 23 of inclination.Location hole 16 play the guiding role along the setting of direction from front to back, the spigot surface 23 of the location hole 16 top left and right sides, are easy to positioning head 11 and insert Enter location hole 16.

The distance between rectangular recess 6 about medial wall is matched with the diameter of sample tray 7.Rectangular recess 6 about is interior The distance between side wall 1cm bigger than the diameter of sample tray 7, makes sample tray 7 be merely able to move forward and backward it is ensured that positioning head 11 exists The straight line upper direction that location hole 16 is arranged in, is easy to positioning head 11 insertion location hole 16.

Just it is being located at optical transceiver 19 apart from the nearest location hole 16 of rectangular recess 6 anteromedial surface on rectangular recess 6 bottom surface Lower section.It is used for the initial alignment of sample tray 7, the positioning of foremost apart from the nearest location hole 16 of rectangular recess 6 anteromedial surface The distance between hole 16 and rearmost location hole 16 are the radius of sample tray 7.

Sample tray 7 includes rounded chassis and the annular sidewall being connected with chassis outer rim, the first permanent magnet and Two permanent magnets are embedded in the front-end and back-end of annular sidewall respectively, and tray bottom is provided with downwardly projecting projection, and projection is in spherical crown Shape, locating dowel 10 is arranged on the bottom of projection.Projection be in spherical, enable sample tray 7 smoothly in a liquid on float downward Dynamic, chassis is used for placing beef sample to be measured, and annular sidewall can prevent liquid from splashing on the beef sample to be measured on chassis.

The digital capture card of ni 24 gathers the control signal that CPU 1 sends, and is controlled by power amplifier 25 Radiation source 20 sends the detection light of varying strength.Photographic head 26 gathers the image information of rectangular recess 6, and is sent to centre Reason unit 1, CPU 1 obtains the positional information of sample tray 7 by image procossing, moves forward and backward in sample tray 7 When be monitored, if sample tray 7 do not move to need insertion location hole 16 surface, CPU 1 lead to Cross the first electric magnet 12 and the second electric magnet 13 adjusts the position of sample tray 7, be easy to CPU 1 and more accurately adjust The position of sample tray 7.Radiation source 20 is Halogen light.

During detection, beef sample to be measured is placed on sample tray 7, makes beef sample be centrally located at sample tray 7 Center.

CPU 1 controls the first electric magnet 12 to work, and the first electric magnet 12 produces suction, on sample tray 7 First permanent magnet is subject to the first electric magnet 12 suction, and sample tray 7 moves to the anteromedial surface of rectangular recess 6, and simultaneously first Permanent magnet is subject to suction just to the first electric magnet 12, calibrates the position of positioning head 11 it is ensured that positioning head 11 is inserted into positioning Hole 16.The distance between rectangular recess 6 about medial wall is more bigger than the diameter of sample tray 7, before and after so that sample tray 7 is merely able to Motion, it is ensured that the straight line upper direction that is arranged in location hole 16 of positioning head 11, is easy to positioning head 11 insertion location hole 16.Work as sample When product pallet 7 is contacted with rectangular recess 6 anteromedial surface, (now, positioning head 11 is positioned at nearest apart from rectangular recess 6 anteromedial surface Location hole 16 surface), the first proximity switch 18 sends trigger, and CPU 1 receives first close to opening Close 18 triggers sending, control the first electric magnet 12 to quit work, nearest the determining of command range rectangular recess 6 anteromedial surface 3rd electric magnet 17 of position hole 16 bottom works, and the 3rd electric magnet 17 produces suction, and the positioning head 11 of sample tray 7 bottom is subject to the The suction of three electric magnet 17 inserts this location hole 16, and the second proximity switch 33 in this location hole 16 sends trigger. CPU 1 receives the trigger that the second proximity switch 33 sends, and judgement sample pallet 7 positions successfully, now sample The central point of product pallet 7 is located at the underface of optical transceiver 19.

User can select sample tray 7 to need location hole 16 position of insertion by touch screen 2.CPU 1 is controlled 3rd electric magnet 17 apart from nearest location hole 16 bottom of rectangular recess 6 anteromedial surface for the system quits work, and sample tray 7 is subject to floating Power effect floats, and the positioning head 11 of sample tray 7 bottom leaves location hole 16.CPU 1 controls the second electric magnet 13 And sample tray 7 needs the 3rd electric magnet 17 of location hole 16 bottom of insertion to work, the second permanent magnet on sample tray 7 By the second electric magnet 13 suction, sample tray 7 moves to the rear medial surface of rectangular recess 6.Need when sample tray 7 moves to When above location hole 16 to be inserted, the positioning head 11 of sample tray 7 lower section is subject to the 3rd electric magnet 13 suction, sample tray The positioning head 11 of 7 bottoms inserts this location hole 16, and the second proximity switch 33 in this location hole 16 sends trigger.Centre Reason unit 1 receives trigger, and judgement sample pallet 7 is successively inserted into the location hole 16 of user's selection.Sample tray 7 is in liquid In movable, no frictional dissipation, realize being accurately positioned by location hole 16.

CPU 1 controls the locating piece 14 that the location hole 16 of sample tray 7 insertion is located to rotate a circle, every level Rotate 5 degree of spectroscopic datas of detection that stop.During detection spectroscopic data, the intensity curve of the detection light that radiation source 20 sends is first Rise to maximum from 0 according to sine curve, then drop to 0 from maximum according to sine curve, as shown in Figure 7.Light-receiving The intensity of reflected light curve that device 21 detection receives, and send it to CPU 1, CPU 1 is to detection After data carries out respective handling, judge whether beef sample to be measured is snowflakes beef.

The present invention is the incident illumination irradiating sample being continually changing using light intensity, gradually big or reduce in the intensity of incident illumination Change procedure in, different groups are gradually big to the absorption of respective wavelength light or reduce, now at the degree of absorption of group During unsaturation, saturation diminuendo, in reflected light, comprise more detection informations, thus enabling the detection signal obtaining more Accurately symbolize whether beef is snowflakes beef.

The method of the one quick detection snowflakes beef of the present embodiment it is adaptable to an above-mentioned quick detection snowflakes beef be System, comprises the following steps:

S1: prepare the beef sample that thickness is 6mm-7mm, beef sample is placed on sample tray, makes beef sample It is centrally located at the center of sample tray；

The instruction that s2: CPU is inputted by touch screen according to user, controls sample tray insertion user to specify Location hole；

S3: CPU controls the detection light that radiation source sends certain light intensity to be radiated at by light source control module On beef sample, detection light intensity first rises to maximum from 0 according to sine curve, then from maximum according to sinusoidal bent Line drops to 0, and optical receiver gathers reflected spectrum data spect (t), then central processing unit controls the first motor work Make, the first motor controls locating piece to rotate 5 degree, make sample tray horizontally rotate 5 degree, optical receiver collection now irradiation light The spectroscopic data of source point of irradiation, so controls sample tray to horizontally rotate 360 degree, often horizontally rotates 5 degree of detection once light that stop Modal data, thus gather spectroscopic data spect (t) of 72 diverse locations on beef sample；

Collect 72 spectroscopic datas spect (t) are all carried out same data processing by s4: CPU, meter Calculate 72 signal to noise ratio eigenvalues, the data processing that each spectroscopic data spect (t) is carried out comprises the following steps:

Using input signalAs input matrix,

It is assumed that signal amplitude minimum (a ＜ ＜ 1) under adiabatic approximation condition, bistable system drives not having enough energy In the case of dynamic, Brownian movement particle is offset in the potential well of side, and the signal period is than the system relaxation time in some typical potential wells To be grown is many, and the now appearance of cyclic drive power makes potential function run-off the straight, ultimately results in Brownian movement particle from a gesture Trap is worked in coordination with as one layer of accidental resonance model to the transition of another one potential well, therefore potential function v (x, t, α) and input signal:

Wherein, v (x, t, α) is potential function, and x (t) is Brownian Particles movement locus function, and t is movement time,For periodic sinusoidal signal, n (t) be interior grasp noise, a is signal amplitude, and f is signal frequency, and d is outer noise Intensity, ξ (t) is outer noise,For phase place,

Calculate v (x, t, α) for the first derivative of x (t), second dervative and three order derivatives, and make equation be equal to 0, obtain To two layers of accidental resonance model:

Set noise intensity d=0,Spect (t)=0, n (t)=0, it is calculated the marginal value of a ForIn a ＜ a_cIn the case of, Brownian movement particle is hovered about its home position, can not be real Transition between existing two potential wells, but particle is in the case of obtaining outer noise intervention, even a ＜ a_cIt also can complete gesture Transition between trap, here it is the generating process of accidental resonance, by a_cSubstitute in one layer of accidental resonance model, and set x₀(t)= 0, sn₀=0, using quadravalence one layer of accidental resonance model of jade for asking rain Ge Kuta Algorithm for Solving, obtain:

$\begin{array}{c}{x}_{n+1}\left(t\right)=x_n+1/6[{\left(k_1\right)}_n+(2-\sqrt{2}){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n]\\ n=\mathrm{0,1},...,n-1\end{array},---\left(3\right)$

Wherein, undetermined coefficient:

${\left(k_1\right)}_n=a{\left({\mathrm{\αx}}_{n-1}\left(t\right)\right)}^2-b{\left({\mathrm{\αx}}_{n-1}\left(t\right)\right)}^3+{\mathrm{sn}}_{n-1}---\left(4\right)$

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

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

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

Wherein, x_nT () is the n order derivative of x (t), sn_nIt is the value at t=0 for the n order derivative of s (t), a, b are set normal Number,

It is calculated x₁(t), x₂(t)…x_n+1T the value of (), to x₁(t), x₂(t)…x_n+1T () is integrated obtaining x (t), And obtain the double-deck stochastic resonance system generation resonance in one layer of accidental resonance model and two layers of accidental resonance model composition for the x (t) The position x in moment_mValue and x_mCorresponding resonance moment t1 acceleration of motion α 1 corresponding with t1 and corresponding with t1 Noise d1, d1 are one of d value,

By formula $\mathrm{snr}=\sqrt{2}{\left(\mathrm{\δu}\frac{{4a}^3/27b}{d_1}\right)}^2{e}^{{-\left(\mathrm{\δu}\right)}^2/d_1},$ It is calculated signal to noise ratio eigenvalue snr_Feature, wherein, δ u=a²/4b；

S5: by calculate 72 signal to noise ratio eigenvalue snr_FeatureCompare with the threshold value setting respectively, if snr_Feature＞- 68.74 judge this corresponding test point of signal to noise ratio eigenvalue for white spectrum point, if snr_Feature＜ -77.49 judges this signal to noise ratio The corresponding test point of eigenvalue is red spectrum point；

White number n1 of spectrum point of s6: statistics and number n2 of red spectrum point, ifAndThen judge that this beef sample is snowflakes beef, otherwise judge that this beef sample is not snowflakes beef.

Light intensity first rises to maximum from 0 according to sine curve, then declines according to sine curve from maximum Detection light to 0 is suitable for detecting the beef sample that thickness is 6mm-7mm.

Step s2 comprises the following steps:

S21: central processing unit controls first work of electromagnet, sample tray is arrived by the first electromagnet suction action At rectangular recess anteromedial surface, the first proximity switch sends trigger；

S22: CPU receives the trigger that the first proximity switch sends, and controls the first electric magnet to stop work Make, the 3rd work of electromagnet of the nearest location hole bottom of command range rectangular recess anteromedial surface, the 3rd electric magnet produces to be inhaled Power, the positioning head of sample tray bottom is inserted this location hole by the suction of the 3rd electric magnet, and the second of this positioning in the hole connects Nearly switch sends trigger；

S23: CPU receives the trigger that the second proximity switch sends, and judgement sample pallet is positioned to Work(, now the central point of sample tray is positioned at the underface of optical transceiver；

S24: CPU reads user and determines that sample tray needs determining of insertion by the instruction that touch screen inputs Position hole site；

S25: central processing unit controls are apart from the 3rd electric magnet of the nearest location hole bottom of rectangular recess anteromedial surface Quit work, sample tray is floated by buoyancy, the positioning head of sample tray bottom leaves location hole；

The 3rd of the location hole bottom of s26: central processing unit controls second electric magnet and sample tray needs insertion Work of electromagnet, sample tray is moved to above the location hole needing to insert by the second electromagnet suction effect, sample tray bottom The positioning head in portion is subject to the 3rd electromagnet suction effect to insert this location hole, and the second proximity switch of this positioning in the hole sends triggering letter Number.Photographic head gathers the image information of rectangular recess, and is sent to CPU, and CPU passes through image procossing Obtain the positional information of sample tray, if sample tray is moved rearwards by excessively, moving to and needing by the second electromagnet suction effect The rear of location hole to be inserted, CPU passes through the first electric magnet and the second electric magnet adjusts the position of sample tray Put, make sample tray be maintained at the surface of the location hole needing insertion.

In the present embodiment, white number n1=10 of spectrum point and number n2=62 of red spectrum point are counted, $\left|\frac{n1}{72}\right|=14\%<20\%,\left|\frac{n2}{72}\right|=86\%>75\%,$ Judge that beef sample is snowflakes beef.

Claims (7)

1. a quick detection snowflakes beef system it is characterised in that: include controller and testing agency, described controller includes CPU (1), touch screen (2) and light source control module (3), described testing agency includes base (4), described base (4) it is provided with monitor station (5), be provided with rectangular recess (6) in the middle part of described monitor station (5), in described rectangular recess (6), store liquid Body, described liquid is provided with rounded sample tray (7), and the front-end and back-end of described sample tray (7) are respectively equipped with first Permanent magnet and the second permanent magnet, described sample tray (7) bottom is provided with locating dowel (10), and described locating dowel (10) bottom is provided with fixed Potential head (11), described positioning head (11) is made up of ferrimagnet, and the anteromedial surface of described rectangular recess (6) is provided with the first electromagnetism Ferrum (12) and the first proximity switch (18), the rear medial surface of described rectangular recess (6) is provided with the second electric magnet (13), described rectangle The bottom surface of groove (6) is provided with the first motor (15) and several rotatable locating pieces (14), described first motor (15) it is connected with locating piece (14) by drive mechanism, described locating piece (14) is provided with angular transducer (34), described positioning Block (14) is provided with positioning head (11) cooperation and limits the freely rotatable location hole (16) of positioning head (11), and described several are determined Location hole (16) on position block (14) is arranged in a linear from front to back, and described location hole (16) bottom is provided with the 3rd electric magnet (17) With the second proximity switch (33), above described sample tray (7), it is provided with optical transceiver (19), described optical transceiver (19) includes shining Penetrate light source (20) and optical receiver (21), described CPU (1) respectively with touch screen (2), light source control module (3), First electric magnet (12), the second electric magnet (13), the 3rd electric magnet (17), the first proximity switch (18), the second proximity switch (33), the first motor (15), optical receiver (21) and angular transducer (34) electrical connection, described light source control module (3) Also electrically connect with radiation source (20).

2. a quick detection snowflakes beef according to claim 1 system it is characterised in that: described positioning head (11) is in Flat, the longitudinal section of described positioning head (11) is in inverted isosceles trapezoid, the shape of described location hole (16) and positioning head (11) form fit, described location hole (16) top is provided with the spigot surface (23) of inclination.

3. a quick detection snowflakes beef according to claim 1 system it is characterised in that: described rectangular recess (6) The distance between left and right medial wall is matched with the diameter of sample tray (7).

4. the quick detection snowflakes beef according to claim 1 or 2 or 3 system it is characterised in that: described light source control Molding block (3) includes the digital capture card of ni (24) and power amplifier (25), the input of the digital capture card (24) of described ni Electrically connect with CPU (1), the outfan of the digital capture card (24) of described ni and the input of power amplifier (25) Electrical connection, the outfan of described power amplifier (25) is electrically connected with radiation source (20).

5. the quick detection snowflakes beef according to claim 1 or 2 or 3 system it is characterised in that: described rectangle is recessed The underface of optical transceiver (19) is located at apart from the nearest location hole (16) of rectangular recess (6) anteromedial surface on groove (6) bottom surface.

6. the method for a quick detection snowflakes beef is it is characterised in that comprise the following steps:

S1: preparation lamellar beef sample, beef sample is placed on sample tray, makes beef sample be centrally located at sample carrier The center of disk；

The instruction that s2: CPU is inputted by touch screen according to user, what control sample tray insertion user specified determines Position hole；

S3: CPU controls the detection light that radiation source sends certain light intensity to be radiated at beef by light source control module On sample, detection light intensity first rises to maximum from 0 according to sine curve, then from maximum according to sine curve Drop to 0, optical receiver gathers reflected spectrum data spect (t), then the work of central processing unit controls first motor, First motor controls locating piece to rotate 5 degree, makes sample tray horizontally rotate 5 degree, optical receiver collection now radiation source The spectroscopic data of point of irradiation, so controls sample tray to horizontally rotate 360 degree, often horizontally rotates 5 degree of spectrum of detection that stop Data, thus gather spectroscopic data spect (t) of 72 diverse locations on beef sample；

Collect 72 spectroscopic datas spect (t) are all carried out same data processing by s4: CPU, calculate 72 signal to noise ratio eigenvalues, the data processing that each spectroscopic data spect (t) is carried out comprises the following steps:

Using input signalAs input matrix, potential function v (x, t, α) with Input signal is worked in coordination with as one layer of accidental resonance model:

Wherein, v (x, t, α) is potential function, and x (t) is Brownian Particles movement locus function, and t is movement time, For periodic sinusoidal signal, n (t) be interior grasp noise, a is signal amplitude, and f is signal frequency, and d is outer noise intensity, and ξ (t) is Outer noise,For phase place, α is acceleration of motion,

Calculate v (x, t, α) for the first derivative of x (t), second dervative and three order derivatives, and make equation be equal to 0, obtain two Layer accidental resonance model:

Set noise intensity d=0,Spect (t)=0, n (t)=0, the marginal value being calculated a isBy a_cSubstitute in one layer of accidental resonance model, and set x₀(t)=0, sn₀=0, using quadravalence jade for asking rain lattice storehouse One layer of accidental resonance model of tower Algorithm for Solving, obtains:

$\begin{array}{c}{x}_{n+1}\left(t\right)=x_n\left(t\right)+1/6\&lsqb;{\left(k_1\right)}_n+(2-\sqrt{2}){\left(k_2\right)}_n+(2+\sqrt{2}){\left(k_3\right)}_n+{\left(k_4\right)}_n\&rsqb;\\ n=0,1,...,n-1\end{array},---\left(3\right)$

Wherein, undetermined coefficient:

(k₁)_n=a (α x_n-1(t))²-b(αx_n-1(t))³+sn_n-1(4)

${\left(k_2\right)}_n=a\left({\mathrm{\&alpha;x}}_{n-1}\right(t)+\frac{{\left(k_1\right)}_{n-1}}{3})-b{\left({\mathrm{\&alpha;x}}_{n-1}\right(t)+\frac{{\left(k_1\right)}_{n-1}}{3})}^3+{\mathrm{sn}}_{n-1}---\left(5\right)$

${\left(k_3\right)}_n=a\left({\mathrm{\&alpha;x}}_{n-1}\right(t)+\frac{{\left(k_2\right)}_{n-1}}{3})-b{\left({\mathrm{\&alpha;x}}_{n-1}\right(t)+\frac{\sqrt{2}-1}{3}{\left(k_1\right)}_{n-1}+\frac{2-\sqrt{2}}{3}{\left(k_2\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}---\left(6\right)$

${\left(k_4\right)}_n=a\left(3{\mathrm{\&alpha;x}}_{n-1}\right(t)+{\left(k_3\right)}_{n-1})-b{\left({\mathrm{\&alpha;x}}_{n-1}\right(t)-\frac{\sqrt{2}}{3}{\left(k_2\right)}_{n-1}+\frac{2+\sqrt{2}}{3}{\left(k_3\right)}_{n-1})}^3+{\mathrm{sn}}_{n+1}---\left(7\right)$

Wherein, x_nT () is the n order derivative of x (t), sn_nIt is the value at t=0 for the n order derivative of s (t), a, b are the constant setting,

It is calculated x₁(t), x₂(t)…x_n+1T the value of (), to x₁(t), x₂(t)…x_n+1T () is integrated obtaining x (t), and Produce the resonance moment to x (t) in the double-deck stochastic resonance system of one layer of accidental resonance model and two layers of accidental resonance model composition Position x_mValue and x_mCorresponding resonance moment t1 acceleration of motion α 1 corresponding with t1 and the noise corresponding with t1 D1, d1 are one of d value,

By formulaIt is calculated signal to noise ratio eigenvalue snr_Feature, wherein, δ u=a²/4b；

S5: by calculate 72 signal to noise ratio eigenvalue snr_FeatureCompare with the threshold value setting respectively, if snr_Feature＞ -68.74 Judge this corresponding test point of signal to noise ratio eigenvalue for white spectrum point, if snr_Feature＜ -77.49 judges this signal to noise ratio feature Being worth corresponding test point is red spectrum point；

White number n1 of spectrum point of s6: statistics and number n2 of red spectrum point, ifAnd Then judge that this beef sample is snowflakes beef, otherwise judge that this beef sample is not snowflakes beef.

7. a quick detection snowflakes beef according to claim 6 method it is characterised in that described step s2 include with Lower step:

S21: central processing unit controls first work of electromagnet, sample tray is subject to the first electromagnet suction action to rectangle At groove anteromedial surface, the first proximity switch sends trigger；

S22: CPU receives the trigger that the first proximity switch sends, and controls the first electric magnet to quit work, 3rd work of electromagnet of the nearest location hole bottom of command range rectangular recess anteromedial surface, the 3rd electric magnet produces suction, The positioning head of sample tray bottom is inserted this location hole by the suction of the 3rd electric magnet, this positioning in the hole second close to opening Pass sends trigger；

S23: CPU receives the trigger that the second proximity switch sends, and judgement sample pallet positions successfully, this When sample tray central point be located at optical transceiver underface；

S24: CPU reads user and determines that sample tray needs the location hole of insertion by the instruction that touch screen inputs Position；

3rd electric magnet apart from the nearest location hole bottom of rectangular recess anteromedial surface for s25: the central processing unit controls stops Work, sample tray is floated by buoyancy, and the positioning head of sample tray bottom leaves location hole；

3rd electromagnetism of the location hole bottom of s26: central processing unit controls second electric magnet and sample tray needs insertion Ironworker makees, and the positioning head of sample tray bottom inserts this location hole, and the second proximity switch of this positioning in the hole sends trigger.