CN108548831A - The method and apparatus for detecting fat content in meat - Google Patents
The method and apparatus for detecting fat content in meat Download PDFInfo
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- CN108548831A CN108548831A CN201810348340.1A CN201810348340A CN108548831A CN 108548831 A CN108548831 A CN 108548831A CN 201810348340 A CN201810348340 A CN 201810348340A CN 108548831 A CN108548831 A CN 108548831A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
- G01N2223/04—Investigating materials by wave or particle radiation by transmission and measuring absorption
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
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- G01N2223/1016—X-ray
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Abstract
The invention discloses the method and apparatus of fat content in detection meat, wherein method includes：Light beam occurs using X-ray to be irradiated the meat sample of known fat content；It is received using photon counting-type x-ray detector and obtains image by the X-ray of meat sample, and determine high energy signal and low energy signal from image, and then obtain high energy signal value and low energy signal value；The characteristic value R that feature calculation obtains meat sample is carried out to high low energy signal value；Fat content and characteristic value R to multiple known meat samples carry out correlation analysis and obtain functional relation；Unknown fat content meat sample is detected using identical step, according to the functional relation of obtained characteristic value R and the fat content and characteristic value R of meat sample, obtains the fat content of unknown fat content meat sample.This method detection time is short, precision is high, data processing is simple, of low cost and will not be damaged to meat sample, can realize high-volume on-line quick detection.
Description
Technical field
The invention belongs to field of food safety, specifically, the present invention relates to detection meat in fat content method and
Device.
Background technology
Currently, the most common method of fat content includes soxhlet extraction methods and near infrared spectroscopic method in detection meat.
However, soxhlet extraction methods complex steps, and it is big to the destruction of product, detection time is longer, although and near infrared spectroscopic method
The fat content in meat can be quickly detected, but cost is high, testing cost is higher.Therefore, how quickly and accurately to examine
The fat content surveyed in meat simultaneously reduces testing cost and needs further to be studied.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is the method and apparatus for proposing fat content in detection meat.Using fatty in detection meat proposed by the present invention
Not only detection time is short, precision is high for the method for content, data processing is simple but also of low cost, and will not be right in detection process
Meat sample damages, and can realize high-volume on-line quick detection.
According to an aspect of the present invention, the present invention proposes a kind of method detecting fat content in meat, including：
(1) light beam occurs using X-ray to be irradiated meat sample to be measured；
(2) it uses photon counting-type x-ray detector to receive and obtains image by the X-ray of the meat sample to be measured, and
High energy signal and low energy signal are determined from described image；
(3) high energy signal value and low energy signal value are obtained according to the high energy signal and the low energy signal；
(4) feature calculation is carried out to the high energy signal value and the low energy signal value, to obtain the meat sample to be measured
The characteristic value R of product；
(5) multiple known meat samples are detected using step (1)-(4), obtain each known meat sample respectively
Characteristic value R, wherein the fat content of the multiple known meat sample is different；
(6) fat content to the multiple known meat sample and characteristic value R carry out correlation analysis, and obtain function
Relationship；
(7) it utilizes characteristic value R described in functional relation described in step (6) and the step (4) to calculate to wait for described in acquisition
Survey the fat content of meat sample.
The method of fat content in detection meat according to the above embodiment of the present invention, the present invention in first with X-ray
Then the meat sample that the known fat content of light beam irradiation occurs adjusts the energy threshold setting of photon counting-type x-ray detector
The high low energy image of suitable meat is obtained, feature calculation is carried out to high energy signal value and low energy signal value according to high low energy image,
Obtain the characteristic value R of the meat sample of known fat content, further to the corresponding fat content of multiple known meat samples and
Characteristic value R carries out correlation analysis, obtains the functional relation of meat sample fat content and characteristic value R；Thus, it is possible to using phase
Same method is detected and obtains characteristic value R to the meat sample to be measured of unknown fat content, and according to the fat of meat sample
The functional relation of fat content and characteristic value R finally obtains the fat content of meat sample to be measured.Relative to soxhlet extraction methods and closely
Infrared spectroscopy, not only detection time is shorter, smart for the method for fat content in the detection meat of the above embodiment of the present invention
Degree higher, data processing are more simple and of low cost, and will not be damaged to meat sample in detection process, can
Realize high-volume on-line quick detection.
In addition, the method for fat content can also have following add in detection meat according to the above embodiment of the present invention
Technical characteristic：
In some embodiments of the invention, the X-ray generation light beam penetrates source using continuous spectrum X-ray.Thus, it is possible to drop
Low complete machine roentgen dose X.
In some embodiments of the invention, in step (4), high energy signal value/low energy described in the characteristic value R=
Signal value.Thus, it is possible to further increase accuracy of detection.
In some embodiments of the invention, in step (6), the functional relation is linear relationship.
In some embodiments of the invention, the linear relationship is y=ax+b, and it is fat content, x that y, which is characterized value R, x,
For 0-100%.
According to the second aspect of the invention, the invention also provides a kind of device of fat content in detection meat, packets
It includes：
Meat platform is carried, X-ray is provided on the load meat platform and penetrates source irradiated region, the X-ray penetrates source irradiated region and is suitable for placing
Meat sample to be measured,
X-ray penetrates source, and the X-ray is penetrated source and is arranged in the top for carrying meat platform, and the X-ray penetrates the light beam photograph of source generation
It penetrates and penetrates source irradiated region in the X-ray, to be irradiated to meat sample to be measured；
Photon counting-type x-ray detector, the photon counting-type x-ray detector are arranged in the lower section for carrying meat platform,
And the underface of source irradiated region is penetrated positioned at the X-ray, to receive the X-ray by the meat sample to be measured.
The device of fat content in detection meat according to the above embodiment of the present invention can be penetrated source using X-ray and light occurs
Beam irradiates the meat sample to be measured to penetrating source irradiated region positioned at X-ray, and is received described in process using photon counting-type x-ray detector
The X-ray of meat sample to be measured, the device are not only simple in structure, and penetrate source hair to X-ray using photon counting-type x-ray detector
The X-ray photon meter gone out need not carry out the power spectrum shaping of ray filtration, and all ray energies can be used as effective energy, energy
Enough effectively reduce the dose of radiation of whole type；A certain energy threshold is used as respectively by detector internal pulses comparing function
The high low energy signal of boundary is counted, and the image of the high low energy signal of measurement is made to be more clear, and allows the characteristic value signal of calculating
It is more accurate, and then more accurately fat content in meat is detected, and only need meat sample to be measured to penetrate source by X-ray and shine
Penetrate that area is primary, can obtain the high low energy signal of meat sample to be measured, and without the brightness to picture, calibration of picture etc. into
Row is adjusted.As a result, use the above embodiment of the present invention detection meat in fat content device to fat content in meat into
When row detection, the characteristic value R of meat sample can be detected and obtained to the meat sample of known fat content first, in turn
By carrying out correlation analysis to the corresponding fat content of multiple known meat samples and characteristic value R, meat sample fat is obtained
Then the functional relation of content and characteristic value R is again detected the meat sample to be measured of unknown fat content using the device
And characteristic value R is obtained, in conjunction with the functional relation of the fat content and characteristic value R of meat sample, it can finally obtain meat to be measured
The fat content of sample；Compared to soxhlet extraction methods and near infrared spectroscopic method, using the device in meat sample to be measured
Fat content be detected not only the time required to shorter, precision higher, data processing it is more simple but also of low cost, and
Meat sample will not be damaged in detection process, can realize high-volume on-line quick detection.
In some embodiments of the invention, the load meat platform is transmission belt.Thus, it is possible to will be to be measured by transmission belt
Meat sample delivery is penetrated source irradiated region to X-ray and is detected, and realizes continuous, the mass detection of multiple meat samples to be measured.
In some embodiments of the invention, it is provided with multiple equally distributed X-rays in the transmission belt and penetrates source irradiated region.
It is detected thus, it is possible to which multiple meat samples to be measured are fed sequentially into X-ray and penetrate source irradiated region.
In some embodiments of the invention, the transmission belt is configured to uniform motion, the speed of the uniform motion
For 0.5-2m/s.It can not only ensure accuracy of detection as a result, but also detection efficiency can be improved.
In some embodiments of the invention, the transmission belt is configured to intermittent movement, to make each X-ray
The source irradiated region of penetrating runs to the X-ray stop 0.05-0.2 seconds when penetrating immediately below source.Thus, it is possible to be further ensured that detection essence
Degree.
Description of the drawings
Fig. 1 is the method flow diagram of fat content in detection meat according to an embodiment of the invention；
Fig. 2 is the pictorial diagram of meat material to be measured according to an embodiment of the invention and the high low energy figure that detection obtains
Picture；
Fig. 3 is the equation of linear regression of the fat content and characteristic value R of meat material according to an embodiment of the invention；
Fig. 4 is the apparatus structure schematic diagram of fat content in detection meat according to an embodiment of the invention；
Fig. 5 is the apparatus structure schematic diagram of fat content in the detection meat according to another embodiment of the invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Inventor has found exploring the during of how quickly and accurately detecting fat content in meat, the fat in meat
Fat content can influence intensity in transmission of the X-ray after meat, in addition, the thickness and density of meat can also influence the saturating of X-ray
Intensity is penetrated, is difficult the fat content in accurate detection meat using X-ray list energy detecting system therefore；And substance is in low energy spectral coverage
Interior linear absorption coefficient variation acutely, high energy spectral coverage linear absorption coefficient variation it is relatively slow, high low energy signal calculates gained
The characteristic signal of characterization substance be different in different material, inventor imagines, can be using this characteristic signal as detecting not
With a parameter of fat content.
For this purpose, according to an aspect of the present invention, the present invention proposes a kind of method detecting fat content in meat, ginseng
Fig. 1 is examined, including：
S100：Light beam occurs using X-ray to be irradiated meat sample to be measured；S200：It is visited using photon counting-type X-ray
It surveys device and receives the X-ray acquisition image for passing through meat sample to be measured, and determine high energy signal and low energy signal from image；
S300：High energy signal value and low energy signal value are obtained according to high energy signal and low energy signal；S400：To high energy signal value and low energy
Signal value carries out feature calculation, to obtain the characteristic value R of meat sample to be measured；S500：Using step S100-S400 to multiple
Known meat sample is detected, and obtains the characteristic value R of each known meat sample respectively, wherein multiple known meat samples
Fat content it is different；S600：Fat content and characteristic value R to multiple known meat samples carry out correlation analysis, and obtain
Obtain functional relation；S700：It is calculated using characteristic value R in functional relation in step S600 and step S400 and obtains meat sample to be measured
Fat content.
The method of fat content in detection meat according to the above embodiment of the present invention, the present invention in first with X-ray
Then the meat sample that the known fat content of light beam irradiation occurs adjusts the energy threshold setting of photon counting-type x-ray detector
The high low energy image of suitable meat is obtained, feature calculation is carried out to high energy signal value and low energy signal value according to high low energy image,
Obtain the characteristic value R of the meat sample of known fat content, further to the corresponding fat content of multiple known meat samples and
Characteristic value R carries out correlation analysis, obtains the functional relation of meat sample fat content and characteristic value R；Thus, it is possible to using phase
Same method is detected and obtains characteristic value R to the meat sample to be measured of unknown fat content, and according to the fat of meat sample
The functional relation of fat content and characteristic value R finally obtains the fat content of meat sample to be measured.Relative to soxhlet extraction methods and closely
Infrared spectroscopy, not only detection time is shorter, smart for the method for fat content in the detection meat of the above embodiment of the present invention
Degree higher, data processing are more simple and of low cost, and will not be damaged to meat sample in detection process, can
Realize high-volume on-line quick detection.
It is retouched in detail below with reference to the method for fat content in the detection meat of Fig. 1-3 pairs of the above embodiment of the present invention
It states.
According to a particular embodiment of the invention, X-ray generation light beam may be used continuous spectrum X-ray and penetrate source.It is adopted in the present invention
The X-ray by meat sample to be measured is received with photon counting-type x-ray detector, photon counting-type x-ray detector is to penetrating source hair
The X-ray photon meter gone out need not carry out the power spectrum shaping of ray filtration, and all ray energies can be used as effective energy, and
And due to the limitation of commercial Application cost, it is also difficult to penetrate source using narrow-band spectrum and carry out dual energy detection.Pass through in the present invention as a result,
Source is penetrated using continuous spectrum X-ray, the high low energy power spectrum shaping of light beam irradiation meat sample progress to be measured occurs, can not only obtained opposite
Independent high low energy ray is detected, moreover it is possible to which the dose of radiation for effectively reducing whole type significantly reduces testing cost.
According to a particular embodiment of the invention, it determines and receives by using the method for the gray value of extraction image in the present invention
To high low energy image in high energy signal and low energy signal.
According to a particular embodiment of the invention, in step (4), characteristic value R=high energy signals value/low energy signal value.X-ray is visited
The absorption imaging that the signal that device detects is substance is surveyed, according to Bi-Chromatic energy absorption models, I=I0·exp(-μ·
T), wherein I0For the light intensity of incident X-ray, I is intensity in transmission of the X-ray of sensor reception after object, and T is thickness
Degree, μ is linear absorption coefficient, related with density p, effective Atomic absorption Z and photon energy E, i.e. μ=ρ τ (EZ), therefore,
It is affected by the thickness and density of substance in meat X-ray list energy detecting system, it is difficult to accomplish accurately to the fat content of meat
Detection.And inventor has found, linear absorption coefficient variation of the substance in low energy spectral coverage is violent, and in the linear of high energy spectral coverage
Absorption coefficient variation is relatively slow, and the characteristic signal that high low energy signal calculates the characterization substance of gained is different in different material, such as
(Fig. 2 (left side) is the pictorial diagram of meat sample to be measured, and Fig. 2 (right side) is the high low energy image of meat that detection obtains) shown in Fig. 2, it is different
The image values of the characterization signal of fat content have differences, therefore, in dual energy detection system, if high low energy point is respectively adopted
It Wei not EhAnd ElThe photon of energy carries out the detection for the something that thickness is T, then obtains Ih=Ih0·exp(-μhT), Il=
Il0·exp(-μlT), influence of the thickness to the intensity in transmission detected is eliminated, then there are ln (Ih/Ih0)/ln(Il/Il0)=(-
μh·T)/(-μlT)=μh/μl=R, the present inventor is using this characteristic value R as one of the different fat contents of detection
Parameter not only can obtain the fat content of meat according to difference existing for the corresponding characteristic value R of different fat contents, can be with
Further increase accuracy of detection.
According to a particular embodiment of the invention, in step (6), functional relation is linear relationship.Inventor passes through to known
Fat content meat is detected to obtain its high low energy image, then the characteristic signal of corresponding fat content is obtained by feature calculation
Numerical value, correlation analysis then is carried out to the numerical value of fat content and corresponding characteristic signal, specifically, by the fat of meat
Content carries out linear fit as first function (abscissa) and using characteristic value R as second function (ordinate), obtains fat
The linear relationship of content and characteristic value R, and the linear relation obtained is y=ax+b, wherein y is characterized value R, and x contains for fat
Amount, x 0-100%, a are slope, with X-ray penetrate the voltage in source, electric current and thickness it is related, b is that fat content is 0 in meat
When corresponding characteristic value R, as shown in Figure 3.Thus, it is possible to which fat content is returned with the linear of characteristic value R in the meat for passing through structure
Equation is returned to be detected the meat of unknown fat content.
According to a particular embodiment of the invention, meat sample structure fat content and spy of the preferred pin to certain certain species
Equation of linear regression between value indicative R, and the fat content of the meat sample of the certain species is detected using the equation,
Specifically, it for the meat of the different cultivars such as pork, mutton, beef, can build between different fat contents and characteristic value R
Equation of linear regression, to detect the fat content of different cultivars meat sample, thus, it is possible to further increase detection essence
Degree.
According to a particular embodiment of the invention, when being detected to the meat sample of unknown fat content, testing conditions are excellent
Select the testing conditions when equation of linear regression between structure fat content and characteristic value R identical, thus, it is possible to further carry
High measurement accuracy.
According to the second aspect of the invention, the invention also provides a kind of devices of fat content in detection meat, such as
Shown in Fig. 4, including load meat platform 10, X-ray penetrate source 20 and photon counting-type x-ray detector 30.Wherein, it carries and is arranged on meat platform 10
There is X-ray to penetrate source irradiated region 11, X-ray penetrates source irradiated region 11 and is suitable for placing meat sample 40 to be measured；It is flat in load meat that X-ray penetrates the setting of source 20
The top of platform 10, and X-ray penetrates the light beam of the generation of source 20 and is radiated at X-ray and penetrates source irradiated region 11, so as to meat sample 40 to be measured into
Row irradiation；Photon counting-type x-ray detector 30, which is arranged, is carrying the lower section of meat platform 10, and is penetrating source irradiated region 11 just positioned at X-ray
Lower section, to receive the X-ray by meat sample 40 to be measured.
The device of fat content in detection meat according to the above embodiment of the present invention can penetrate the generation of source 20 using X-ray
Light beam irradiates the meat sample to be measured to penetrating source irradiated region 11 positioned at X-ray, and receives warp using photon counting-type x-ray detector 30
The X-ray of the meat sample to be measured is crossed, which is not only simple in structure, and using photon counting-type x-ray detector 30 to X
Light, which penetrates the X-ray photon meter that source 20 is sent out, need not carry out the power spectrum shaping of ray filtration, and all ray energies being capable of conduct
Effective energy can effectively reduce the dose of radiation of whole type；By detector internal pulses comparing function respectively to a certain
Energy threshold is counted as the high low energy signal of boundary, and the image of the high low energy signal of measurement is made to be more clear, and allows calculating
Characteristic value signal it is more accurate, and then more accurately fat content in meat is detected, and only need meat sample to be measured
Source irradiated region 11 is penetrated by X-ray once, can obtain the high low energy signal of meat sample to be measured, and without to the bright of picture
Degree, the calibration etc. of picture are adjusted.The device pair of fat content in the detection meat of the above embodiment of the present invention is used as a result,
When fat content is detected in meat, the meat sample of known fat content can be detected first and obtain meat sample
The characteristic value R of product, and then by carrying out correlation analysis to the corresponding fat content of multiple known meat samples and characteristic value R,
The functional relation of meat sample fat content and characteristic value R is obtained, then uses the device to the to be measured of unknown fat content again
Meat sample is detected and obtains characteristic value R, can be in conjunction with the functional relation of the fat content and characteristic value R of meat sample
Finally obtain the fat content of meat sample to be measured；Compared to soxhlet extraction methods and near infrared spectroscopic method, using the device
Shorter, precision higher, data processing are more simple the time required to being detected not only to the fat content in meat sample to be measured,
And it is of low cost, and meat sample will not be damaged in detection process, it can realize high-volume on-line quick detection.
It is retouched in detail below with reference to the device of fat content in the detection meat of Fig. 4-5 pairs of the above embodiment of the present invention
It states.
According to a particular embodiment of the invention, source 20 can be penetrated using X-ray light beam occurs and irradiates to be located to carry meat platform 10
On meat sample 40 to be measured, and receive the X-ray by meat sample 40 to be measured using photon counting-type x-ray detector 30, lead to
The energy threshold setting for crossing adjustment photon counting-type x-ray detector 30, obtains the high low energy image of meat sample 40 to be measured, in turn
Feature calculation can be carried out to high energy signal and low energy signal according to high low energy image, obtain the characteristic value R of meat sample to be measured.
According to a particular embodiment of the invention, as shown in figure 5, it can be transmission belt to carry meat platform 10.It as a result, not only can be with
Meat sample delivery to be measured to X-ray is penetrated source irradiated region 11 by transmission belt to be detected, moreover it is possible to realize multiple meat samples to be measured
Continuous, the mass detection of product, and then significantly improve detection efficiency.
According to a particular embodiment of the invention, it can be provided with multiple equally distributed X-rays in transmission belt and penetrate source irradiated region.
It is detected thus, it is possible to which multiple meat samples to be measured are fed sequentially into X-ray and penetrate source irradiated region 11, and further increases detection
Efficiency.
According to a particular embodiment of the invention, transmission belt can be configured to uniform motion, and the speed of uniform motion can be with
For 0.5-2m/s.It can not only ensure accuracy of detection as a result, but also detection efficiency can be improved.
According to a particular embodiment of the invention, transmission belt can be configured to intermittent movement, to make each X-ray penetrate source
Irradiated region runs to X-ray stop 0.05-0.2 seconds when penetrating immediately below source.Thus, it is possible to be further ensured that accuracy of detection.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiments or example.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of method of fat content in detection meat, which is characterized in that including：
(1) light beam occurs using X-ray to be irradiated meat sample to be measured；
(2) it uses photon counting-type x-ray detector to receive and obtains image by the X-ray of the meat sample to be measured, and from institute
It states and determines high energy signal and low energy signal in image；
(3) high energy signal value and low energy signal value are obtained according to the high energy signal and the low energy signal；
(4) feature calculation is carried out to the high energy signal value and the low energy signal value, to obtain the meat sample to be measured
Characteristic value R；
(5) multiple known meat samples are detected using step (1)-(4), obtain the spy of each known meat sample respectively
Value indicative R, wherein the fat content of the multiple known meat sample is different；
(6) fat content to the multiple known meat sample and characteristic value R carry out correlation analysis, and obtain function pass
System；
(7) it utilizes characteristic value R described in functional relation described in step (6) and the step (4) to calculate and obtains the meat to be measured
The fat content of class sample.
2. the method for fat content in detection meat according to claim 1, which is characterized in that light occurs for the X-ray
Shu Caiyong continuous spectrum X-rays penetrate source.
3. the method for fat content in detection meat according to claim 1, which is characterized in that in step (4),
High energy signal value/low energy signal value described in the characteristic value R=.
4. the method for fat content in detection meat according to claim 1, which is characterized in that in step (6), the letter
Number relationship is linear relationship.
5. the method for fat content in detection meat according to claim 4, which is characterized in that the linear relationship is y
=ax+b,
It is fat content, x 0-100% that y, which is characterized value R, x,.
6. the device of fat content in a kind of detection meat, which is characterized in that including：
Meat platform is carried, X-ray is provided on the load meat platform and penetrates source irradiated region, it is to be measured suitable for placing that the X-ray penetrates source irradiated region
Meat sample,
X-ray penetrates source, and the X-ray is penetrated source and is arranged in the top for carrying meat platform, and the X-ray is penetrated the light beam that source occurs and is radiated at
The X-ray penetrates source irradiated region, to be irradiated to meat sample to be measured；
Photon counting-type x-ray detector, the photon counting-type x-ray detector are arranged in the lower section for carrying meat platform, and position
The underface of source irradiated region is penetrated in the X-ray, to receive the X-ray by the meat sample to be measured.
7. detecting the device of fat content in meat according to claim 6, which is characterized in that the load meat platform is transmission belt.
8. detecting the device of fat content in meat according to claim 7, which is characterized in that be provided in the transmission belt multiple
Equally distributed X-ray penetrates source irradiated region.
9. detecting the device of fat content in meat according to claim 7, which is characterized in that the transmission belt is configured at the uniform velocity
The speed of movement, the uniform motion is 0.5-2 meter per seconds.
10. detecting the device of fat content in meat according to claim 7, which is characterized in that between the transmission belt is configured to
Formula of having a rest moves, and is stopped 0.05-0.2 seconds to make each X-ray penetrate source irradiated region and run to the X-ray when of penetrating immediately below source.
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