CN108801795A - A kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser - Google Patents
A kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser Download PDFInfo
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- CN108801795A CN108801795A CN201810636026.3A CN201810636026A CN108801795A CN 108801795 A CN108801795 A CN 108801795A CN 201810636026 A CN201810636026 A CN 201810636026A CN 108801795 A CN108801795 A CN 108801795A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
Abstract
The invention belongs to technical field of food detection more particularly to a kind of livestock meat viscoelasticity detection data acquisition methods, and in particular to a kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser ranging technique includes the following steps：S1, prepare livestock meat sample；S2, acquisition strain data；S3, identified sign value；S4, strain-time graph and load-deformation curve are obtained, analyzes the viscoelasticity of livestock meat.The air-flow and laser technology that the present invention uses all have non-contact, nondestructive advantage, can be directed to different livestock meat samples, obtain corresponding strain and stress data, to obtain significant data for the research of the viscoelasticity of livestock meat.
Description
Technical field
The invention belongs to technical field of food detection more particularly to a kind of livestock meat viscoelasticity detection data acquisition method,
More particularly to a kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser.
Background technology
Livestock meat is a kind of typical viscoelastic body, the not only elastic property with solid, but also the tacky quality with liquid.
Containing abundant protein in livestock meat, the protein and its hydrated sheath form reticular structure, there is certain ability for resisting external force,
This species resistance is the viscoelasticity for showing as meat.
Currently, domestic research work is concentrated mainly on the pure elastic problem of meat, it can not reflect meat products completely
Viscoelasticity feature；Both at home and abroad to the detection of meat viscoelasticity, typically utilize universal testing machine, Texture instrument etc., to sample into
Row compression failure is tested.This detection mode generates contact, irreversible destruction and pollution, the sample after test to sample
Product lose follow-up use value, and this kind of instrument price is expensive, is not easy to popularize.
For the above deficiency, in order to improve the viscoelasticity detection technique of livestock and poultry meat, the viscoelasticity inspection of quick nondestructive is studied
Measured data acquisition method just has great importance.
Invention content
In view of the deficiencies in the prior art, the object of the present invention is to provide a kind of livestock meat viscoelasticity testing numbers
According to acquisition method, specifically a kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser.This method has
Non-destructive, sample are without the low advantage of cross-infection and equipment cost.
To achieve the above objectives, the technical solution adopted by the present invention is that：
A kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, includes the following steps：
The preparation of S1, livestock meat sample：The meat at the same position of livestock and poultry is obtained as sample, sample is cut and is shaped as ruler
Very little consistent several samples to be tested 2；
The acquisition of S2, strain data：Under same time point, same external environment, using having merged air-flow and Laser Measuring
Livestock meat viscoelasticity nondestructive detection system away from technology carries out gas shock to sample to be tested 2；
Pass through the lifting of lifting platform 1 so that the surface of sample to be tested 2 is bonded with nozzle；
The sense organ of livestock meat is judged, general to lean on the chewing of tooth or pressed with finger, the period is all 2~3s；
In order to make sample to be tested 2 show viscoelasticity, the time setting of the gas shock under the action of gas shock
To be no less than 2s, this stage is air-flow load phase；
Meanwhile acquiring deformation data (the deformation letter of sample to be tested 2 in real time using livestock meat viscoelasticity nondestructive detection system
Breath), i.e., the data that deflection changes over time；
After gas shock, in order to observe and record the deformation behaviour when 2 stabilization of sample to be tested, in air-flow
After impact, continue to acquire deformation data, the time for continuing to acquire deformation data is no less than 5s, this stage is that deformation is extensive
The multiple stage；
The deformation data of at least five position is acquired to each sample to be tested 2；
In order to avoid the hypotelorism of acquisition position, the viscoelasticity of 2 regional area of sample to be tested is had an impact, adjacent two
The distance between a acquisition position is not less than 20mm, and in order to avoid the edge of sample to be tested 2 causes to do to acquisition deformation data
It disturbs, acquisition position is not less than 20mm apart from the edge of sample to be tested 2；
The deformation data of 2 all acquisition positions of sample to be tested is averaged again, the deflection d as the sample to be tested 2
(t)；Concrete operations are to each acquisition position of sample to be tested 2 to acquire one group of deformation data sequence, and each acquisition position
Deformation data sequence length is identical, after the deformation data sequence acquisition of all acquisition positions of the sample to be tested 2, to institute
There is the deformation data sequence of acquisition position to carry out average calculating operation, obtains the average value of 2 deformation data of sample to be tested；When to all
After the completion of the deformation data acquisition of sample to be tested 2, is calculated by computer 7, obtain the strain that all samples to be tested 2 change over time
Value ε (t), wherein t is time variable；
The determination of S3, stress value：Gas shock causes sample to be tested 2 to deform, according to power on the surface of sample to be tested 2
Active force and reaction force principle replace stress value using atmospheric pressure value (air-flow pressure force value), carry out subsequent analysis；Since there are gas
Crushing loses, and the atmospheric pressure value on 2 surface of sample to be tested is acted on using difference gauge detection；
S4, strain value ε (t) and atmospheric pressure value by acquisition obtain strain-time graph using computer 7 and stress-are answered
Varied curve, and then analyze the viscoelasticity of livestock meat.
Based on the above technical solution, in step S1, the meat for obtaining the same position of livestock and poultry refers to as sample
Cannot be to the same position gross sample of livestock and poultry, but meat is uniformly partly taken out and is used as sample, ensure the livestock and poultry to be measured
Meat sample product reflect the viscous-elastic behaviour at the same position of livestock and poultry as much as possible.For example, after obtaining the cucumber strip in beef, cucumber is first removed
The apparent uneven part of both ends thickness, then samples since intermediate position, can guarantee the glutinous bullet of beef cucumber strip sample in this way
Property it is consistent.
Based on the above technical solution, in step S1, in order to avoid the size of sample to be tested 2 is too small, and to be measured
Deformation of the sample 2 under gas shock generates interference, and described by sample cutting, simultaneously shaping refers to cutting sample and being shaped as ruler
The very little sample to be tested 2 not less than 80mm × 60mm × 20mm (length × width x thickness), and the quantity of sample to be tested 2 is no less than 3.
In step S2, the exposure of sample to be tested 2 is too long in air in order to prevent, and 2 surface moisture of sample to be tested is caused to evaporate,
Surface is dried, and to which viscoelasticity changes, therefore to be completed as early as possible to the acquisition of 2 deformation information of sample to be tested.
Based on the above technical solution, in step S2, the strain value ε (t) is the deflection d that computer 7 calculates
(t) with the ratio of 2 original depth h of sample to be tested, the calculation formula such as formula (1) of strain value ε (t) (longitudinal strain) is shown,
ε (t)=d (t)/h (1).
Based on the above technical solution, in step S2, test sample is treated in order to avoid the original depth h of sample to be tested 2
The deformation of product 2 generates interference, and maximum strain value ε (t) of the control sample to be tested 2 under gas shock effect is no more than 30%.
Based on the above technical solution, maximum strain value of the control sample to be tested 2 under gas shock effect,
Stream pressure is set by electric Proportion valve 10 to realize and (reduce stream pressure, then maximum strain value reduces).
Based on the above technical solution, in step S3, lifting platform 1 is reduced, sample to be tested 2 is removed；By the differential pressure
The middle position of the hose alignment nozzle of meter, the middle position is the position of 5 input path of sensor probe, adjusts hose port
Distance apart from jet hole detects the atmospheric pressure value at different distance value, correspondingly obtains 2 surface different distortion amount of sample to be tested
Atmospheric pressure value when (different distortion amount corresponds to different distance values).
Based on the above technical solution, the model HT-1891 of the difference gauge.
The advantageous effects of the present invention are as follows：
The present invention is realized using air-flow and laser ranging technique carries out undamaged detection to livestock meat viscoelasticity.Air-flow and
Laser technology all has non-contact, nondestructive advantage.The present invention can be directed to different livestock meat samples, and acquisition is answered accordingly
Become and stress data, the viscoelasticity research to be livestock meat obtain significant data.
Description of the drawings
The present invention has following attached drawing：
The present invention is based on the flow diagrams of air-flow and the livestock meat viscoelasticity detection data acquisition method of laser by Fig. 1.
The acquisition position schematic diagram of certain acquisition sample to be tested deformation information of Fig. 2.
Fig. 3 utilizes strain-time plot that the method for the present invention obtains.
Fig. 4 livestock meat viscoelasticity nondestructive detection system structural schematic diagrams.
Reference numeral：
1 lifting platform, 2 samples to be tested, 3 air storage injection apparatus, 4 fixed frames, 5 sensor probes, 6RS-232C communicate mould
Block DL-RS1A, 7 computers, 8 sensor amplifiers, 9 microcontroller development boards, 10 electric Proportion valves, 11 solenoid valves, 12 tracheaes, 13
Air compressor, 14 filtering pressure reducing valves.
Specific implementation mode
In order to illustrate more clearly of the present invention, with reference to the accompanying drawings of the specification and embodiment, the specific implementation to the present invention
Mode is described in further detail.Following embodiment is merely to illustrate invention, but cannot be used for limiting the scope of the invention.It is aobvious and
Be clear to, the following description and drawings be only the present invention section Example, for those of ordinary skill in the art for, not
Under the premise of making the creative labor, other accompanying drawings and embodiment can also be obtained according to listed attached drawing.
As shown in figure 4, a kind of livestock meat viscoelasticity nondestructive detection system, including：Air compressor 13, swashs at control device
Optar, sensor probe 5, computer 7 and difference gauge；
The air compressor 13 is by tracheae 12 to the surface output gas flow of sample to be tested 2；The control device includes
Microcontroller development board 9 and several valve bodies being connect with microcontroller development board 9, the valve body are installed on tracheae 12；The laser
Rangefinder includes sensor probe 5, and deformation information of the sensor probe 5 for acquiring 2 surface of sample to be tested in real time is simultaneously anti-
It is fed in the computer 7；The difference gauge is for detecting the atmospheric pressure value for acting on 2 surface of sample to be tested, and real-time display, guarantor
Surveyed atmospheric pressure value is deposited, exports the atmospheric pressure value to computer 7, for drawing stress time curve and load-deformation curve；Institute
It states difference gauge and is equipped with hose；The computer 7 is connect with microcontroller development board 9, for controlling several valve bodies, the calculating
The strain value ε (t) that sample to be tested 2 changes over time is calculated in machine 7, and receives atmospheric pressure value derived from difference gauge, strained-
Time graph and load-deformation curve, and then analyze the viscoelasticity of livestock meat；Close to the air compressor on the tracheae 12
13 one end is equipped with filtering pressure reducing valve 14.
The livestock meat viscoelasticity nondestructive detection system further includes lifting platform 1, air storage injection apparatus 3, sensor amplifier 8
With RS-232C communication modules DL-RS1A6, the lifting platform 1 is located at the lower section of sample to be tested 2, for driving 2 liters of sample to be tested
Drop movement；The output end of the tracheae 12 is connect with air storage injection apparatus 3, and the air storage injection apparatus 3 is located at sample to be tested 2
Top is equipped with nozzle in the lower end of air storage injection apparatus 3, and the nozzle is towards sample to be tested 2；The surface of sample to be tested 2 and institute
The distance for stating nozzle is 0mm；The input path of the sensor probe 5, it is coaxial with the nozzle of ejection air-flow；The laser side away from
Instrument further includes sensor amplifier 8, and the sensor probe 5 passes through sensor amplifier 8 and RS-232C communication modules DL-
RS1A6 communication connections, the RS-232C communication modules DL-RS1A 6 are connect with computer 7.
The livestock meat viscoelasticity nondestructive detection system, further includes fixed frame 4, the lifting platform 1, sample to be tested 2 and
Nozzle is respectively positioned in fixed frame 4；One end of the tracheae 12 is connect with air compressor 13.
Several valve bodies include solenoid valve 11 and electric Proportion valve 10, and the solenoid valve 11 is distinguished with electric Proportion valve 10
It is installed on tracheae 12.
The break-make of air-flow is controlled by the solenoid valve 11, is realized the control to the airflow function time, is passed through electrical ratio
Atmospheric pressure value is arranged in valve 10.
As shown in Figure 1 for the present invention is based on the flows of air-flow and the livestock meat viscoelasticity detection data acquisition method of laser to show
It is intended to, specific embodiment is as follows.
(1) preparation of livestock meat sample
From the meat at supermarket's purchase livestock and poultry same position as sample, cannot to the meat gross sample at the same position of livestock and poultry, and
It is uniformly partly to take out meat to be used as sample, ensures that the livestock meat sample to be measured reflects the same position of livestock and poultry as much as possible
Viscous-elastic behaviour.In the present embodiment, after obtaining the cucumber strip in cold fresh beef, it is obviously uneven first to remove cucumber strip both ends thickness
Part, then sampled since intermediate position, can guarantee the consistent of beef cucumber strip sample viscoelasticity in this way.
Sample is cut and is shaped as the consistent several samples to be tested 2 of size.In order to avoid sample to be tested 2 size too
It is small, and interference is generated to the deformation of the sample to be tested 2 under gas shock, in the present embodiment, sample is cut and is shaped as
The quantity of the sample to be tested 2 of 80mm × 60mm × 30mm (length × width x thickness), sample to be tested 2 is 3.All samples to be tested 2 are waken up
Temperature (sample to be tested 2 is placed under room temperature environment and carries out heat exchange) about 30min, after the temperature of sample to be tested 2 is restored to room temperature,
It follows the steps below.
(2) acquisition of strain data
The deformation information of sample to be tested 2 is acquired using livestock meat viscoelasticity nondestructive detection system, i.e. deflection becomes at any time
The data of change.The livestock meat viscoelasticity nondestructive detection system uses air-flow and laser ranging technique, wherein air-flow to be compressed by air
Machine 13 provides, and acts power to 2 surface of sample to be tested；Change of the sensor probe 5 for acquiring 2 surface of sample to be tested in real time
Shape information, sample frequency 50Hz acquire a deformation value every 0.02s.
In order to make sample to be tested 2 show viscoelasticity under the action of gas shock, rushing for air-flow is set in the present embodiment
It is 2s to hit the time.After gas shock, in order to observe and record the deformation behaviour when 2 stabilization of sample to be tested, this
Embodiment continues to acquire deformation data after gas shock, sets the time for continuing acquisition deformation data as 5s.
Stop after gas shock effect 2s, sample to be tested 2 starts to restore deformation.Therefore, the number of 7s time spans is acquired altogether
According to as data to be analyzed.The deformation data of 5 positions is acquired to each sample to be tested 2, then the deformation data of 5 positions is taken
Average value, the deflection d (t) as sample to be tested 2.
When gas shock, in order to avoid the hypotelorism of acquisition position, the viscoelasticity of 2 regional area of sample to be tested is produced
Raw to influence, the distance between two neighboring acquisition position is not less than 20mm, and in order to avoid 2 edge of sample to be tested deforms acquisition
Data interfere, and acquisition position is not less than 20mm apart from the edge of sample to be tested 2.It is illustrated in figure 2 this acquisition and waits for test sample
The acquisition position schematic diagram of product deformation information, wherein the circle in Fig. 2 is acquisition position.
The exposure of sample to be tested 2 is too long in air in order to prevent, causes the change of 2 ingredient of sample to be tested, to viscoelasticity
It changes, therefore the acquisition of 2 deformation information of sample to be tested will be completed as early as possible.
After the completion of the deformation data acquisition of all samples to be tested 2, calculated by computer 7, the strain changed over time
Value ε (t), strain-time graph are as shown in Figure 3.The calculating process of computer 7, is summarized as follows.
After the completion of the data acquisition of deflection d (t) calculates, the strain value ε (t) of all samples to be tested 2, strain value ε are calculated
(t) it is the ratio of deflection d (t) and the original depth h of sample to be tested 2, shown in the calculation formula such as formula (1) of strain value ε (t),
ε (t)=d (t)/h (1)
Wherein：ε (t) is the strain value changed over time；D (t) is the deflection changed over time；H is sample to be tested 2
Original depth.
Strain value ε (t) data acquisition calculate after, using gas shock after sample to be tested 2 deformation data observation
The deformation behaviour of sample to be tested 2.After deformation behaviour is gas shock, whether sample to be tested 2 can restore completely, if can be complete
It is complete to restore；Then illustrate that residual deformation is not present in sample to be tested 2；If cannot restore completely, illustrate that sample to be tested 2 has remaining become
Shape.Strain-time data of acquisition is showed in graph form, such as in the present embodiment in order to facilitate observation deformation behaviour
Shown in Fig. 3.3 samples to be tested 2 are clearly observed by Fig. 3 in the recoverable force stage completely not restore, and with the time
Extend, recoverable force gradually tends to a steady state value, and it is special to illustrate that the 5s recovery times for continuing to acquire deformation data can characterize recovery
Sign.
(3) determination of stress value
Gas shock causes sample to be tested 2 to deform, according to the active force and reaction force of power, adopts on 2 surface of sample to be tested
Stress value is replaced to carry out subsequent analysis with atmospheric pressure value.
Interference is generated to the deformation of sample to be tested 2 in order to avoid the thickness h of sample to be tested 2, control sample to be tested 2 is in air-flow
Maximum strain value under percussion is no more than 30%.
In the present embodiment, stream pressure is set as 70kPa, since there are atmospheric pressure lost, profits by electric Proportion valve 10
With difference gauge (model：HT-1891) detection acts on the atmospheric pressure value on 2 surface of sample to be tested.Atmospheric pressure value is at 2 surface of sample to be tested
The atmospheric pressure value of air-flow central position.
Measure 2 surface pressure value of sample to be tested method be：The hose of difference gauge is aligned to the middle position of nozzle, that is, is passed
The position of sensor 5 input paths of probe, distance of the adjustment hose port apart from jet hole, detects the atmospheric pressure value at different distance value,
Correspondingly obtain atmospheric pressure value when 2 different distortion amount of sample to be tested (different distortion amount corresponds to different distance values).
In the present embodiment, the maximum deformation quantity of sample to be tested 2 about 6mm, as shown in figure 3, i.e. maximum strain value about 20%,
Meet the requirement that maximum strain value is no more than 30%.(correspond to sample to be tested using 0~10mm of difference gauge measured distance jet hole
2 deflection is 0~10mm) stream pressure in range is 4.024 ± 0.006kPa, it is believed that sample to be tested 2 0~
Atmospheric pressure value within the scope of 10mm deflections is a steady state value, takes the atmospheric pressure value of 4.024kPa as stress value, carries out subsequent analysis.
(4) atmospheric pressure value is obtained with after strain value ε (t) data, can get subsequent load-deformation curve and strain-time
Curve, and then analyze the viscoelasticity of livestock meat.
It is adopted in conclusion the present invention provides a kind of livestock meat viscoelasticity detection data based on air-flow and laser ranging technique
Set method, air-flow and laser technology all have non-contact, nondestructive advantage.The present invention can be directed to different livestock and poultry meat samples
Product obtain corresponding strain and stress data, to obtain test data for the research of livestock meat viscoelasticity.
The embodiment of the present invention merely to provided for the sake of example and description, and be not exhaustive disclose this
The form of ownership of invention, and limit the invention to disclosed form.Ordinary skill of many modifications and variations for this field
It is apparent for personnel.Attached drawing and the embodiment of description merely to the principle of the present invention and practical application is better described,
And make those skilled in the art it will be appreciated that the present invention, is obviously repaiied to which design is suitable for carrying for special-purpose
The various embodiments changed.
The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (8)
1. a kind of livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, which is characterized in that including following step
Suddenly：
The preparation of S1, livestock meat sample：The meat at the same position of livestock and poultry is obtained as sample, sample is cut and is shaped as size one
Several samples to be tested (2) caused；
The acquisition of S2, strain data：Using the livestock meat viscoelasticity nondestructive detection system for having merged air-flow and laser ranging technique
Gas shock is carried out to sample to be tested (2)；
Pass through the lifting of lifting platform (1) so that the surface of sample to be tested (2) is bonded with nozzle；
The time of the gas shock is set as no less than 2s；
Meanwhile acquiring the deformation data of sample to be tested (2) in real time using livestock meat viscoelasticity nondestructive detection system；
After gas shock, continue to acquire deformation data, the time for continuing to acquire deformation data is no less than 5s；
To the deformation data of each sample to be tested (2) acquisition at least five position；
The distance between two neighboring acquisition position is not less than 20mm, and acquisition position is not small apart from the edge of sample to be tested (2)
In 20mm；
The deformation data of sample to be tested (2) all acquisition positions is averaged again, the deflection d as the sample to be tested (2)
(t)；After the completion of being acquired to the deformation data of all samples to be tested (2), is calculated by computer (7), obtain all samples to be tested
(2) the strain value ε (t) changed over time, wherein t is time variable；
The determination of S3, stress value：Gas shock causes sample to be tested (2) to deform, utilizes differential pressure on the surface of sample to be tested (2)
Meter detection acts on the atmospheric pressure value on sample to be tested (2) surface, replaces stress value using atmospheric pressure value, carries out subsequent analysis；
S4, strain value ε (t) and atmospheric pressure value by acquisition obtain strain-time graph and stress-strain using computer (7)
Curve, and then analyze the viscoelasticity of livestock meat.
2. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as described in claim 1
In：In step S1, the meat for obtaining the same position of livestock and poultry refers to uniformly partly taking out meat to be used as sample as sample.
3. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as described in claim 1
In：In step S1, it is described by sample cutting and shaping refer to sample cut and is shaped as size be not less than 80mm × 60mm ×
The sample to be tested (2) of 20mm, and the quantity of sample to be tested (2) is no less than 3.
4. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as described in claim 1
In：In step S2, the strain value ε (t) is deflection d (t) and sample to be tested (2) original depth h that computer (7) calculates
Ratio, shown in the calculation formula such as formula (1) of strain value ε (t),
ε (t)=d (t)/h (1).
5. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as claimed in claim 4
In：In step S2, maximum strain value ε (t) of the control sample to be tested (2) under gas shock effect is no more than 30%.
6. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as claimed in claim 5
In：Maximum strain value of the control sample to be tested (2) under gas shock effect, air-flow is set by electric Proportion valve (10)
Pressure is realized.
7. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as described in claim 1
In：In step S3, lifting platform (1) is reduced, sample to be tested (2) is removed；The hose of the difference gauge is aligned to the central position of nozzle
It sets, the middle position is the position of sensor probe (5) input path, distance of the adjustment hose port apart from jet hole, detection
Atmospheric pressure value at different distance value correspondingly obtains atmospheric pressure value when sample to be tested (2) surface different distortion amount.
8. the livestock meat viscoelasticity detection data acquisition method based on air-flow and laser, feature exist as described in claim 1
In：The model HT-1891 of the difference gauge.
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| CN113008735A (en) * | 2021-02-26 | 2021-06-22 | 中国农业大学 | Material three-dimensional viscoelastic rheological property detection system |
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