CN104089897A - Detection device and detection method for spliced beef - Google Patents

Detection device and detection method for spliced beef Download PDF

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Publication number
CN104089897A
CN104089897A CN201410125313.XA CN201410125313A CN104089897A CN 104089897 A CN104089897 A CN 104089897A CN 201410125313 A CN201410125313 A CN 201410125313A CN 104089897 A CN104089897 A CN 104089897A
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snr
sample
light
value
computing machine
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惠国华
赵梦田
黄洁
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Zhejiang Gongshang University
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Zhejiang Gongshang University
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Abstract

The invention discloses a detection device and a detection method for spliced beef. The detection device comprises a lightproof shell, a halogen lamp, a spectrometer, a light intensity adjustment instrument, an optical fiber detection head disposed in the shell and used for emitting incident light and receiving reflected light, a bracket and a light receiving instrument. The bracket comprises a bottom plate, a sample support plate over the bottom plate, and an L-shaped fixation arm disposed on the edge of the bottom plate. The sample support plate is provided with a sample placement hole, and the sample support plate close to the sample placement hole is provided with several sample hanging needles. The L-shaped fixation arm includes a horizontal plate over the sample support plate and a vertical rod in fixed connection with the sample support plate. The horizontal plate's part over the sample placement hole is provided with a vertical extension arm extending toward the sample placement hole. The device and the method provided by the invention have the characteristics of fast detection speed, more detection points, and higher data detection reliability and precision.

Description

A kind of splicing beef pick-up unit and detection method
Technical field
The present invention relates to measurement techniques for quality detection of meat detection technique field, especially relate to a kind of splicing beef pick-up unit and detection method that can detect accurately and rapidly splicing beef.
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.
At present, conventionally adopt spectrum stimulus light source to irradiate sample (adopting a Halogen lamp LED of often opening or LED lamp to impinge upon on sample) both at home and abroad, and gather incident illumination be mapped to after sample diffuse or through the transmitted light of sample, diffuse reflection spectrum or transmitted spectrum are analyzed, finally realized the detection to sample quality; But this detection method exists the detection quantity of information collecting less, the lower deficiency of precision of detection.At present also not for detection of the effective ways that splice beef.
Chinese patent Granted publication number: CN101769889A, July 7 2010 Granted publication day, the electric nasus system that a kind of quality of agricultural product detects is disclosed, comprise that one mainly completes the gas enrichment module that low concentration smell is collected, one is mainly converted into olfactory signal air chamber gas path module and the sensor array of electric signal, one mainly carries out filtering to sensor array output signal, analog to digital conversion, the Conditioning Circuits of Sensor of feature extraction and data preprocessing module, a pair of signal is identified and is judged, and with the embedded system of data storage, one shows and result output module, described gas enrichment module is made up of the adsorption tube, heating wire and the attemperating unit that are filled with adsorbent.This invention has function singleness, the deficiency that detection time is long.
Summary of the invention
The present invention is the deficiency in order to overcome the low and length consuming time of detection method precision of the prior art, provides a kind of and can detect accurately and rapidly beef whether corrupt splicing beef pick-up unit and detection method.
To achieve these goals, the present invention is by the following technical solutions:
A kind of splicing beef pick-up unit, described pick-up unit comprises light tight housing, Halogen lamp LED, spectrometer, light intensity regulating device, be located in housing for sending incident light and receiving catoptrical optical fiber detection head, support and optical pickup apparatus; Described support comprises base plate, is positioned at the sample splint of base plate top and is located at the L shaped fixed arm on bottom edge, and sample splint is provided with sample putting hole, is provided with several sample tucks near the sample splint of sample putting hole;
Described L shaped fixed arm comprises the leveling board and the montant that passes sample splint and be fixedly connected with sample splint that are positioned at sample splint top, the position that is positioned at sample putting hole top of leveling board is provided with the vertical adjutage extending to sample putting hole, leveling board is provided with the first drive motor for driving vertical adjutage to horizontally rotate, and described vertical adjutage bottom is provided with the second drive motor for driving optical fiber detection head to swing back and forth at vertical guide;
Described optical pickup apparatus comprise be located on base plate with the coaxial support column of vertical adjutage, be located at the guide rail on support column and be located on guide rail for receiving the light-receiving head of incident light through the transmitted light after sample, described guide rail is with swinging center taking optical fiber detection head circular-arc as the center of circle; In described base plate, be provided with the 3rd drive motor for driving support column rotation, light-receiving head is provided with the 4th drive motor for driving light-receiving head to move in guide rail;
Light intensity regulating device, Halogen lamp LED and optical fiber detection head are connected successively, and optical fiber detection head and light-receiving head are electrically connected with spectrometer respectively, on spectrometer and each drive motor, are equipped with the signal output port for being electrically connected with computing machine.
Light intensity regulating device of the present invention is for regulating the light intensity of the light source that Halogen lamp LED sends, computing machine is horizontally rotated and is rotated on vertical guide by first, second drive motor control optical fiber detection head, computing machine horizontally rotates by the 3rd Electric Machine Control support column, catches transmitted light by the 4th Electric Machine Control light-receiving head; Thereby the present invention can be detected the multiple points on sample, adopt different incident angles to irradiate, and the detection signal that each point of irradiation is obtained carry out data analysis, detection wider, detection information more comprehensively, has improved the reliability of testing result.
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 the absorption spectrum signal of the incident light of sample to same incident angle approaches, and can be used as the foundation of detection.Although and the different fragments processes of splicing meat arrange, gluing and surface treatment, its inherent meat lines is also discontinuous, has overall tomography, it is larger that color and luster differs, and 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 reflected light and transmitted light, comprise more detection information, be splicing thereby the detection signal that makes to obtain can symbolize beef more accurately.
Therefore, it is fast that the present invention has detection speed, and check point is more, and the reliability and the precision that detect data are higher.
As preferably, described light intensity regulating device comprises data collecting card and power amplifier, described data collecting card is provided with the signal input interface for being electrically connected with computing machine, described data collecting card is electrically connected with the input end of power amplifier, and the output terminal of described power amplifier is electrically connected with the power supply of Halogen lamp LED.
Computing machine produces the waveform for controlling intensity variation, data collecting card gathers this waveform signal, and output on power amplifier, the output terminal of power amplifier is electrically connected with the power supply of Halogen lamp LED, thereby realize the adjusting of the light intensity of the light source that Halogen lamp LED is sent by controlling the power supply of Halogen lamp LED, and pass through the incident light of optical fiber detection head to sample irradiation Strength Changes.
As preferably, described guide rail comprises guiding base plate, be located at guiding plate upper surface and along the arc of guiding base plate to two spaced grooves that extend, described groove floor is provided with the tooth bar of uniformly-spaced arranging; Described light-receiving head bottom is provided with two gears that match with groove; Described the 4th drive motor is positioned at light-receiving head bottom, the rotating shaft of the 4th drive motor be located at two coupling shafts between gear and be connected.The structure of guide rail is arranged so that light-receiving head can move back and forth under the drive of the 4th drive motor in guide rail.
As preferably, described guiding base plate also comprises the first curved baffle and second curved baffle relative with the first curved baffle; The first arc, the second curved baffle are provided with corresponding guide chute; The coupling shaft two ends of described gear are provided with the outrigger shaft of the guide chute for inserting the first arc, the second curved baffle.The setting of the first curved baffle and the second curved baffle, while making the motion of light-receiving head, stability is better.
As preferably, described drive motor is stepper motor; Support column is connected with base plate by bearing, and vertical adjutage is connected with leveling board by bearing, and optical fiber detection head is connected with vertical adjutage by bearing.
A detection method of splicing beef pick-up unit, comprises the steps:
(6-1) from meat to be detected, take out sheet meat as detected sample, computing machine is electrically connected with spectrometer and each motor, sample is kept flat on sample tuck;
(6-2) computer control the second drive motor drives optical fiber detection head to turn to default incident angle; The initial value of setting adjutage number of revolutions i is 1;
(6-3) computing machine drives adjutage to turn to angle 20 × i by the first drive motor, and makes the 3rd drive motor drive support column to synchronize and rotate with adjutage; The moving driven by motor light-receiving head of computer control 4 wheel driven moves on guide rail, and observe by spectrometer the light intensity that light-receiving head receives, computing machine be parked in guide rail by the moving Electric Machine Control light-receiving head of 4 wheel driven with the corresponding position of light intensity maximal value;
(6-4) computing machine regulates optical fiber detection head output detections light by light intensity regulating device, and described detection light rises to maximal value MAT from 0 according to sinusoidal curve, then drops to 0 from maximal value MAT according to straight line; Spectrometer receives the detection signal Spect (t) of the reflected light corresponding with detecting light and transmitted light sum formation;
(6-5) work as i<18, make i value increase by 1, repeating step (6-3), to (6-4), obtains 18 detection signal Spect (t);
(6-6) computing machine all does following data processing to 18 detection signal Spect (t):
(6-6-1) by detection signal Spect (t) input one deck accidental resonance model in, wherein, V (x, t) is potential function, x (t) is Brownian movement Particles Moving lopcus function, and a, b is the constant of setting, and ξ (t) is external noise, and D is external noise intensity, and N (t) grasps noise in being, for periodicity sinusoidal signal, A is signal amplitude, and f is signal frequency, and t is run duration, for phase place, establish
(6-6-2) computing machine calculates first order derivative and the second derivative of V (x, t) for x, and makes equation equal 0, obtains two layers of accidental resonance model:
Set noise intensity D=0, spect (t)=0, N (t)=0; The critical value that calculates A is
(6-6-3) by critical value substitution one deck accidental resonance model of A, and set X 0(t)=0, sn 0=0, with quadravalence jade for asking rain Ge Kuta Algorithm for Solving one deck accidental resonance model, obtain x n + 1 ( t ) = x n ( t ) + 1 / 6 [ ( k 1 ) n + ( 2 - 2 ) ( k 2 ) n + ( 2 + 2 ) ( k 3 ) n + ( k 4 ) n ] ; And calculate ( k 1 ) n = 4 ( a x n - 1 ( t ) - b x n - 1 3 ( t ) + s n n - 1 ) , ( k 2 ) n = 4 [ a ( x n - 1 ( t ) + ( k 1 ) n - 1 2 ) - b ( x n - 1 ( t ) + ( k 1 ) n - 1 2 ) 3 + s n n - 1 ] , ( k 3 ) n = 4 [ a ( x n - 1 ( t ) + ( k 2 ) n - 1 2 ) - b ( x n - 1 ( t ) + 2 - 1 2 ( k 1 ) n - 1 + 2 - 2 2 ( k 2 ) n - 1 ) 3 + s n n + 1 ] , ( k 4 ) n = 4 [ a ( x n - 1 ( t ) + ( k 3 ) n - 1 ) - b ( x n - 1 ( t ) - 2 2 ( k 2 ) n - 1 + 2 + 2 2 ( k 3 ) n - 1 ) 3 + s n n + 1 ] ;
Wherein, x n(t) be the n order derivative of x (t), sn n-1that the n-1 order derivative of S (t) is at the value at t=0 place, sn n+1be the n+1 order derivative of S (t) in the value at t=0 place, n=0,1 ..., N-1; Obtain x 1(t), x 2(t) ..., x n+1(t) value;
(6-6-4) computing machine is to x 1(t), x 2(t) ..., x n+1(t) carry out integration, obtain x (t), and obtain the position x of x (t) in the double-deck stochastic system generation accidental resonance moment of one deck accidental resonance model and two layers of accidental resonance model composition mvalue and x mcorresponding resonance moment t 1and and t 1corresponding noise D 1, D 1for a value in D;
(6-6-5) computing machine utilizes formula calculate the signal to noise ratio (S/N ratio) of double-deck stochastic resonance system output; Wherein, Δ U=a 2/ 4b; Obtain 18 output signal-to-noise ratio SNR 1, SNR 2..., SNR 18;
(6-7) computing machine is by SNR 9and SNR 18form the 1st group of snr value, SNR 1, SNR 8, SNR 10and SNR 17form the 2nd group of snr value, SNR 2, SNR 7, SNR 11and SNR 16form the 3rd group of snr value, SNR 3, SNR 6, SNR 12and SNR 15form the 4th group of snr value, SNR 4, SNR 5, SNR 13and SNR 14form the 5th group of snr value, and calculate respectively each group of signal to noise ratio (S/N ratio) mean value: SNR average 1, SNR average 2, SNR average 3, SNR average 4, SNR average 5;
Calculate the error QE between each snr value and its corresponding group of signal to noise ratio (S/N ratio) mean value j, j=1 ..., 18;
Computing machine calculates and meets QE jthe number M of≤2.5% output signal-to-noise ratio error 1; Computing machine calculates and meets QE jthe number M of the output signal-to-noise ratio error of >2.5% 2;
If (6-8) computing machine is made the judgement that sample is not splicing meat;
If computing machine is made the judgement that sample is splicing meat;
Otherwise it is 1 that computing machine makes i value, return to step (6-3), sample is again detected and carries out data processing.
As preferably, the thickness of described sheet meat is 35 to 150mm.
As preferably, described default incident angle is 15 to 45 degree.
As preferably, the span of MAT is 100 luxs, lux to 200.
Therefore, the present invention has following beneficial effect: (1) detection speed is fast; (2) check point is more, and the reliability and the precision that detect data are higher.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is a kind of theory diagram of the present invention;
Fig. 3 is a kind of cut-open view of guide rail of the present invention;
Fig. 4 is a kind of vertical view of guide rail of the present invention;
Fig. 5 is that detection light intensity of the present invention changes schematic diagram;
Fig. 6 is a kind of process flow diagram of embodiments of the invention.
In figure: Halogen lamp LED 1, spectrometer 2, light intensity regulating device 3, support 4, optical pickup apparatus 5, base plate 6, sample splint 7, sample is placed net 8, L shaped fixed arm 9, leveling board 10, montant 11, vertical adjutage 12, the first drive motor 13, the second drive motor 14, support column 15, guide rail 16, light-receiving head 17, the 3rd drive motor 18, the 4th drive motor 19, data collecting card 20, power amplifier 21, computing machine 22, optical fiber detection head 23, guiding base plate 161, groove 162, gear 163, coupling shaft 164, the first curved baffle 165, the second curved baffle 166, guide chute 167, outrigger shaft 168, the 3rd baffle plate 169, the 4th baffle plate 170.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Embodiment is as shown in Figure 1 and Figure 2 a kind of splicing beef pick-up unit, pick-up unit comprises light tight housing, Halogen lamp LED 1, spectrometer 2, light intensity regulating device 3, be located in housing for send incident light and receive catoptrical optical fiber detection head 23, support 4 and optical pickup apparatus 5; Support comprises base plate 6, is positioned at the sample splint 7 of base plate top and is located at the L shaped fixed arm 9 on bottom edge, and sample splint is provided with sample putting hole 8, is provided with sample tuck 27 near the sample splint of sample putting hole;
L shaped fixed arm comprises the leveling board 10 and the montant 11 that passes sample splint and be fixedly connected with sample splint that are positioned at sample splint top, the position that is positioned at sample putting hole top of leveling board is provided with the vertical adjutage 12 extending to sample putting hole, leveling board is provided with the first drive motor 13 for driving vertical adjutage to horizontally rotate, and vertical adjutage bottom is provided with the second drive motor 14 for driving optical fiber detection head to swing back and forth at vertical guide;
As shown in Figure 1, Figure 3, optical pickup apparatus comprise be located on base plate with the coaxial support column 15 of vertical adjutage, be located at the guide rail 16 on support column and be located on guide rail for receiving the light-receiving head 17 of incident light through the transmitted light after sample, guide rail is with swinging center taking optical fiber detection head circular-arc as the center of circle; In described base plate, be provided with the 3rd drive motor 18 for driving support column rotation, light-receiving head is provided with the 4th drive motor 19 for driving light-receiving head to move in guide rail;
Light intensity regulating device, Halogen lamp LED and optical fiber detection head are connected successively, and optical fiber detection head and light-receiving head are electrically connected with spectrometer respectively, on spectrometer and each drive motor, are equipped with the signal output port for being electrically connected with computing machine 22.
As shown in Figure 2, light intensity regulating device comprises N1-6259 data collecting card 20 and power amplifier 21, data collecting card is provided with the signal input interface for being electrically connected with computing machine, data collecting card is electrically connected with the input end of power amplifier, and the output terminal of power amplifier is electrically connected with the power supply of Halogen lamp LED.
As shown in Fig. 1, Fig. 3, Fig. 4, guide rail comprises the base plate 161 that leads, is located at the arc of guiding plate upper surface edge guiding base plate to two spaced grooves 162 of extension, and groove floor is provided with the tooth bar of uniformly-spaced arranging; Light-receiving head bottom is provided with two gears that match with groove 163; The 4th drive motor is positioned at light-receiving head bottom, the rotating shaft of the 4th drive motor be located at two coupling shafts 164 between gear and be connected, be also provided with the 3rd baffle plate 169 and the 4th baffle plate 170.
Guiding base plate also comprises the first curved baffle 165 and second curved baffle 166 relative with the first curved baffle; The first arc, the second curved baffle are provided with corresponding guide chute 167; The coupling shaft two ends of gear are provided with the outrigger shaft 168 of the guide chute for inserting the first arc, the second curved baffle.
Drive motor is stepper motor; Support column is connected with base plate by bearing, and vertical adjutage is connected with leveling board by bearing, and optical fiber detection head is connected with vertical adjutage by bearing.
As shown in Figure 6, a kind of detection method of splicing beef pick-up unit, comprises the steps:
Step 100, sample preparation:
From meat to be detected, take out 30 grams of sheet meat as detected sample, computing machine is electrically connected with spectrometer and each motor, sample is kept flat on sample tuck;
Step 200, the incident angle of adjusting optical fiber detection head:
Computer control the second drive motor drives optical fiber detection head and pedal line to be the angle of 20 degree; The initial value of setting adjutage number of revolutions i is 1;
Step 300, light-receiving head location:
Computing machine drives adjutage to turn to angle 20 × i by the first drive motor, and makes the 3rd drive motor drive support column to synchronize and rotate with adjutage; The moving driven by motor light-receiving head of computer control 4 wheel driven moves on guide rail, and observe by spectrometer the light intensity that light-receiving head receives, computing machine be parked in guide rail by the moving Electric Machine Control light-receiving head of 4 wheel driven with the corresponding position of light intensity maximal value;
Step 400, detects:
Computing machine regulates optical fiber detection head output detections light by light intensity regulating device, and described detection light rises to 200 luxs from 0 according to sinusoidal curve, then drops to 0 from 200 luxs according to straight line; Spectrometer receives the detection signal Spect (t) of the reflected light corresponding with detecting light and transmitted light sum formation;
Step 500, data processing:
Work as i<18, make i value increase by 1, repeating step 300 to 400, obtains 18 detection signal Spect (t);
Step 600, computing machine all does following data processing to 18 detection signal Spect (t):
Step 610, by detection signal Spect (t) input one deck accidental resonance model in, wherein, V (x, t) is potential function, x (t) is Brownian movement Particles Moving lopcus function, and a, b is the constant of setting, and ξ (t) is external noise, and D is external noise intensity, and N (t) grasps noise in being, for periodicity sinusoidal signal, A is signal amplitude, and f is signal frequency, and t is run duration, for phase place, establish
Step 620, computing machine calculates first order derivative and the second derivative of V (x, t) for x, and makes equation equal 0, obtains two layers of accidental resonance model:
Set noise intensity D=0, spect (t)=0, N (t)=0; The critical value that calculates A is
Step 630, by critical value substitution one deck accidental resonance model of A, and sets X 0(t)=0, sn 0=0, with quadravalence jade for asking rain Ge Kuta Algorithm for Solving one deck accidental resonance model, obtain x n + 1 ( t ) = x n ( t ) + 1 / 6 [ ( k 1 ) n + ( 2 - 2 ) ( k 2 ) n + ( 2 + 2 ) ( k 3 ) n + ( k 4 ) n ] ; And calculate ( k 1 ) n = 4 ( a x n - 1 ( t ) - b x n - 1 3 ( t ) + s n n - 1 ) , ( k 2 ) n = 4 [ a ( x n - 1 ( t ) + ( k 1 ) n - 1 2 ) - b ( x n - 1 ( t ) + ( k 1 ) n - 1 2 ) 3 + s n n - 1 ] , ( k 3 ) n = 4 [ a ( x n - 1 ( t ) + ( k 2 ) n - 1 2 ) - b ( x n - 1 ( t ) + 2 - 1 2 ( k 1 ) n - 1 + 2 - 2 2 ( k 2 ) n - 1 ) 3 + s n n + 1 ] , ( k 4 ) n = 4 [ a ( x n - 1 ( t ) + ( k 3 ) n - 1 ) - b ( x n - 1 ( t ) - 2 2 ( k 2 ) n - 1 + 2 + 2 2 ( k 3 ) n - 1 ) 3 + s n n + 1 ] ;
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, n=0,1 ..., N-1; Obtain x 1(t), x 2(t) ..., x n+1(t) value;
Step 640, computing machine is to x 1(t), x 2(t) ..., x n+1(t) carry out integration, obtain x (t), and obtain the position x of x (t) in the double-deck stochastic system generation accidental resonance moment of one deck accidental resonance model and two layers of accidental resonance model composition mvalue and x mcorresponding resonance moment t 1and and t 1corresponding noise D 1, D 1for a value in D; D is a function with 0.01 loop cycle stepping in [0,1] scope, and the value of D and time correlation, known t 1moment, D 1just determine.
Step 650, computing machine utilizes formula calculate the signal to noise ratio (S/N ratio) of double-deck stochastic resonance system output; Wherein, Δ U=a 2/ 4b; Obtain 18 output signal-to-noise ratio SNR 1, SNR 2..., SNR 18;
Step 700, snr value grouping is calculated:
Computing machine is by SNR 9and SNR 18form the 1st group of snr value, SNR 1, SNR 8, SNR 10and SNR 17form the 2nd group of snr value, SNR 2, SNR 7, SNR 11and SNR 16form the 3rd group of snr value, SNR 3, SNR 6, SNR 12and SNR 15form the 4th group of snr value, SNR 4, SNR 5, SNR 13and SNR 14form the 5th group of snr value, and calculate respectively each group of signal to noise ratio (S/N ratio) mean value: SNR average 1, SNR average 2, SNR average 3, SNR average 4, SNR average 5;
Calculate the error QE between each snr value and its corresponding group of signal to noise ratio (S/N ratio) mean value j, j=1 ..., 18;
Computing machine calculates and meets QE jthe number M of≤2.5% output signal-to-noise ratio error 1; Computing machine calculates and meets QE jthe number M of the output signal-to-noise ratio error of >2.5% 2;
Step 800, judges:
If computing machine is made the judgement that sample is not splicing meat;
If computing machine is made the judgement that sample is splicing meat;
Otherwise it is 1 that computing machine makes i value, returns to step 300, sample is again detected and carries out data processing.
In the present embodiment, M 1be 19, computing machine is made the judgement that sample is not splicing meat.
Should be understood that the present embodiment is only not used in and limits the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.

Claims (9)

1. a splicing beef pick-up unit, it is characterized in that, described pick-up unit comprises light tight housing, Halogen lamp LED (1), spectrometer (2), light intensity regulating device (3), be located in housing for sending incident light and receiving catoptrical optical fiber detection head (23), support (4) and optical pickup apparatus (5); Described support comprises base plate (6), is positioned at the sample splint (7) of base plate top and is located at the L shaped fixed arm (9) on bottom edge, sample splint is provided with sample putting hole (8), is provided with several sample tucks (27) near the sample splint of sample putting hole;
Described L shaped fixed arm comprises the leveling board (10) and the montant (11) that passes sample splint and be fixedly connected with sample splint that are positioned at sample splint top, the position that is positioned at sample putting hole top of leveling board is provided with the vertical adjutage (12) extending to sample putting hole, leveling board is provided with the first drive motor (13) for driving vertical adjutage to horizontally rotate, and described vertical adjutage bottom is provided with the second drive motor (14) for driving optical fiber detection head to swing back and forth at vertical guide;
Described optical pickup apparatus comprises the support column coaxial with vertical adjutage (15) be located on base plate, be located at the guide rail (16) on support column and be located on guide rail for receiving the light-receiving head (17) of incident light through the transmitted light after sample, described guide rail is with swinging center taking optical fiber detection head circular-arc as the center of circle; In described base plate, be provided with the 3rd drive motor (18) for driving support column rotation, light-receiving head is provided with the 4th drive motor (19) for driving light-receiving head to move in guide rail;
Light intensity regulating device, Halogen lamp LED and optical fiber detection head are connected successively, and optical fiber detection head and light-receiving head are electrically connected with spectrometer respectively, on spectrometer and each drive motor, are equipped with the signal output port for being electrically connected with computing machine (22).
2. a kind of splicing beef pick-up unit according to claim 1, it is characterized in that, described light intensity regulating device comprises data collecting card (20) and power amplifier (21), described data collecting card is provided with the signal input interface for being electrically connected with computing machine, described data collecting card is electrically connected with the input end of power amplifier, and the output terminal of described power amplifier is electrically connected with the power supply of Halogen lamp LED.
3. a kind of splicing beef pick-up unit according to claim 1, it is characterized in that, described guide rail comprises the base plate (161) that leads, is located at the arc of guiding plate upper surface edge guiding base plate to two spaced grooves (162) of extension, and described groove floor is provided with the tooth bar of uniformly-spaced arranging; Described light-receiving head bottom is provided with two gears that match with groove (163); Described the 4th drive motor is positioned at light-receiving head bottom, the rotating shaft of the 4th drive motor be located at two coupling shafts (164) between gear and be connected.
4. a kind of splicing beef pick-up unit according to claim 3, is characterized in that, described guiding base plate also comprises the first curved baffle (165) and second curved baffle (166) relative with the first curved baffle; The first arc, the second curved baffle are provided with corresponding guide chute (167); The coupling shaft two ends of described gear are provided with the outrigger shaft (168) of the guide chute for inserting the first arc, the second curved baffle.
5. according to the one splicing beef pick-up unit described in claim 1 or 2 or 3 or 4, it is characterized in that, described drive motor is stepper motor; Support column is connected with base plate by bearing, and vertical adjutage is connected with leveling board by bearing, and optical fiber detection head is connected with vertical adjutage by bearing.
6. a detection method that is applicable to splicing beef pick-up unit claimed in claim 1, is characterized in that, comprises the steps:
(6-1) from meat to be detected, take out sheet meat as detected sample, computing machine is electrically connected with spectrometer and each motor, sample is kept flat on sample tuck;
(6-2) computer control the second drive motor drives optical fiber detection head to turn to default incident angle; The initial value of setting adjutage number of revolutions i is 1;
(6-3) computing machine drives adjutage to turn to angle 20 × i by the first drive motor, and makes the 3rd drive motor drive support column to synchronize and rotate with adjutage; The moving driven by motor light-receiving head of computer control 4 wheel driven moves on guide rail, and observe by spectrometer the light intensity that light-receiving head receives, computing machine be parked in guide rail by the moving Electric Machine Control light-receiving head of 4 wheel driven with the corresponding position of light intensity maximal value;
(6-4) computing machine regulates optical fiber detection head output detections light by light intensity regulating device, and described detection light rises to maximal value MAT from 0 according to sinusoidal curve, then drops to 0 from maximal value MAT according to straight line; Spectrometer receives the detection signal Spect (t) of the reflected light corresponding with detecting light and transmitted light sum formation;
(6-5) work as i<18, make i value increase by 1, repeating step (6-3), to (6-4), obtains 18 detection signal Spect (t);
(6-6) computing machine all does following data processing to 18 detection signal Spect (t):
(6-6-1) by detection signal Spect (t) input one deck accidental resonance model in, wherein, V (x, t) is potential function, x (t) is Brownian movement Particles Moving lopcus function, and a, b is the constant of setting, and ξ (t) is external noise, and D is external noise intensity, and N (t) grasps noise in being, for periodicity sinusoidal signal, A is signal amplitude, and f is signal frequency, and t is run duration, for phase place, establish
(6-6-2) computing machine calculates first order derivative and the second derivative of V (x, t) for x, and makes equation equal 0, obtains two layers of accidental resonance model:
Set noise intensity D=0, spect (t)=0, N (t)=0; The critical value that calculates A is
(6-6-3) by critical value substitution one deck accidental resonance model of A, and set X 0(t)=0, sn 0=0, with quadravalence jade for asking rain Ge Kuta Algorithm for Solving one deck accidental resonance model, obtain x n + 1 ( t ) = x n ( t ) + 1 / 6 [ ( k 1 ) n + ( 2 - 2 ) ( k 2 ) n + ( 2 + 2 ) ( k 3 ) n + ( k 4 ) n ] ; And calculate ( k 1 ) n = 4 ( a x n - 1 ( t ) - b x n - 1 3 ( t ) + s n n - 1 ) , ( k 2 ) n = 4 [ a ( x n - 1 ( t ) + ( k 1 ) n - 1 2 ) - b ( x n - 1 ( t ) + ( k 1 ) n - 1 2 ) 3 + s n n - 1 ] , ( k 3 ) n = 4 [ a ( x n - 1 ( t ) + ( k 2 ) n - 1 2 ) - b ( x n - 1 ( t ) + 2 - 1 2 ( k 1 ) n - 1 + 2 - 2 2 ( k 2 ) n - 1 ) 3 + s n n + 1 ] , ( k 4 ) n = 4 [ a ( x n - 1 ( t ) + ( k 3 ) n - 1 ) - b ( x n - 1 ( t ) - 2 2 ( k 2 ) n - 1 + 2 + 2 2 ( k 3 ) n - 1 ) 3 + s n n + 1 ] ;
Wherein, x n(t) be the n order derivative of x (t), sn n-1that the n-1 order derivative of S (t) is at the value at t=0 place, sn n+1be the n+1 order derivative of S (t) in the value at t=0 place, n=0,1 ..., N-1; Obtain x 1(t), x 2(t) ..., x n+1(t) value;
(6-6-4) computing machine is to x 1(t), x 2(t) ..., x n+1(t) carry out integration, obtain x (t), and obtain the position x of x (t) in the double-deck stochastic system generation accidental resonance moment of one deck accidental resonance model and two layers of accidental resonance model composition mvalue and x mcorresponding resonance moment t 1and and t 1corresponding noise D 1, D 1for a value in D;
(6-6-5) computing machine utilizes formula calculate the signal to noise ratio (S/N ratio) of double-deck stochastic resonance system output; Wherein, Δ U=a 2/ 4b; Obtain 18 output signal-to-noise ratio SNR 1, SNR 2..., SNR 18;
(6-7) computing machine is by SNR 9and SNR 18form the 1st group of snr value, SNR 1, SNR 8, SNR 10and SNR 17form the 2nd group of snr value, SNR 2, SNR 7, SNR 11and SNR 16form the 3rd group of snr value, SNR 3, SNR 6, SNR 12and SNR 15form the 4th group of snr value, SNR 4, SNR 5, SNR 13and SNR 14form the 5th group of snr value, and calculate respectively each group of signal to noise ratio (S/N ratio) mean value: SNR average 1, SNR average 2, SNR average 3, SNR average 4, SNR average 5;
Calculate the error QE between each snr value and its corresponding group of signal to noise ratio (S/N ratio) mean value j, j=1 ..., 18;
Computing machine calculates and meets QE jthe number M of≤2.5% output signal-to-noise ratio error 1; Computing machine calculates and meets QE jthe number M of the output signal-to-noise ratio error of >2.5% 2;
If (6-8) computing machine is made the judgement that sample is not splicing meat;
If computing machine is made the judgement that sample is splicing meat;
Otherwise it is 1 that computing machine makes i value, return to step (6-3), sample is again detected and carries out data processing.
7. the detection method of splicing beef pick-up unit according to claim 6, is characterized in that, the thickness of described sheet meat is 35 to 150mm.
8. the detection method of splicing beef pick-up unit according to claim 6, is characterized in that, described default incident angle is 15 to 45 degree.
9. according to the detection method of the splicing beef pick-up unit described in claim 6 or 7 or 8, it is characterized in that, the span of MAT is 100 luxs, lux to 200.
CN201410125313.XA 2014-03-31 2014-03-31 Detection device and detection method for spliced beef Pending CN104089897A (en)

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