CN109253701A - Pig carcass back-fat thickness laser detection system and method - Google Patents
Pig carcass back-fat thickness laser detection system and method Download PDFInfo
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- CN109253701A CN109253701A CN201811330725.1A CN201811330725A CN109253701A CN 109253701 A CN109253701 A CN 109253701A CN 201811330725 A CN201811330725 A CN 201811330725A CN 109253701 A CN109253701 A CN 109253701A
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- fat thickness
- laser
- pig carcass
- thickness
- fat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention discloses a kind of pig carcass back-fat thickness laser detection system and method, and the thickness of backfat angle value of pig diad on slaughter line is gone out using laser triangulation principle rapid survey.Measuring system includes back-fat thickness measuring probe, controller and computer back-fat thickness management system.Back-fat thickness measuring probe measurement thickness of backfat angle value is simultaneously transferred to computer pig carcass back-fat thickness management system, carries out a series of pig carcass grades and determines, final thickness of backfat grade is stored and is shown on the display screen of back-fat thickness measuring probe.The present invention be suitble to it is online detection and have it is easy to operate, accuracy rate is high, effectively improve production efficiency.
Description
Technical field
The invention belongs to fresh frozen piece pork classification field more particularly to a kind of pig carcass back-fat thickness detection system and sides
Method.
Background technique
According to existing national standards " GB 9959.1-2001 fresh, frozen piece pork ", fresh, the frozen piece that live pig is butchered, processed
Fat deposit thickness of the pork with the six, the 7th rib cage intermediate parallels of fresh pork to sixth dorsal vertebra spinous process front lower place, after allowancing for bark
(thickness of backfat) is grade scale.Meat producing plant mainly uses following methods to measure pig carcass back-fat thickness both at home and abroad at present.First
Kind is traditional artificial measurement, i.e., worker measures pig diad back-fat thickness with graduated steel ruler is marked, and record data are simultaneously defeated manually
Enter computer, is classified.There are human errors for this manual measurement method, to be easy to cause economic loss, and speed
Slowly, pig slaughtering modern production development is constrained.Second is ultrasonic technology measurement, according to ultrasonic echo automatic identification rouge
Between fascia position, and then calculate back-fat thickness, but this mode needs to pop one's head in and pig carcass epidermis well contacts, thus
It is very high to operation requirement, it is easy to produce misoperation in actual production.The third is machine vision technique measurement, passes through acquisition
Pig diad image realizes identification, image segmentation and the extraction in back fat region in conjunction with image processing algorithm, calculates the thickness of back fat
Degree.But this method, during the dynamic transport of practical slaughter production line, pig carcass constantly becomes at a distance from camera
Change, needs to carry out range correction and the calculating of the thickness of backfat using complicated algorithm.Therefore longer data processing time is needed, simultaneously
Butchering scene, there are higher water mist vapour, also generate interference to the acquisition of image.
Therefore rapidly and accurately fresh, frozen piece pork is classified in order to meet pig slaughtering enterprise, improves enterprise's production
Efficiency, meat producing plant need rapidly and accurately to measure pig carcass back-fat thickness.
Summary of the invention
To solve the above-mentioned problems, the present invention discloses a kind of pig carcass back-fat thickness laser detection system and method, will carry on the back
The functions such as fat thickness measure, record and grade judgement are integrated.
A kind of pig carcass back-fat thickness laser detection system, comprising: back-fat thickness measuring probe, controller and computer back
Fat thickness degree management system, it is characterised in that: the back-fat thickness measuring probe measures pig carcass using laser triangulation principle
Back-fat thickness is simultaneously shown.
Further, back-fat thickness measuring probe includes optical ranging module, control module and display module.
Further, optical ranging module includes station meter, laser generator, bandpass filter, photodetector and focusing
Lens, the bandpass filter are effectively removed the interference of stray light in the thickness of backfat measuring probe working environment, the light
Electric explorer be located at the condenser lens as square focal plane, the laser beam and the condenser lens of the laser generator transmitting
Key light axis it is parallel.
Further, the laser of laser generator transmitting high brightness, high directivity, high monochromaticity and high coherence.
Further, station meter is parallel with the laser beam, and interval is not more than 10mm, and the laser beam and described when using
Station meter keeps horizontal.
Further, control module includes microprocessor and analog/digital signal conversion device.
Further, display module includes one 48 segment numeral pipes and corresponding driving circuit.
Further, controller includes level shifting circuit and signal control transmission module.
Further, computer back-fat thickness management system determines for back-fat thickness data validation, record and grade.
Further, data transmission uses between back-fat thickness measuring probe and the computer back-fat thickness management system
RS-485 communications protocol.
A kind of pig carcass back-fat thickness laser detecting method, it is characterised in that: measure pig using laser triangulation principle
Carcass backfat.
Further, laser generator issues laser beam, and vertical incidence pig carcass exocuticle simultaneously forms dotted light in exocuticle
Spot, hot spot are formed clearly as laser beam is parallel with condenser lens key light axis, leads to through condenser lens on as square focal plane
Analytic geometry calculating is crossed, thickness of backfat angle value can be obtained:
Wherein, d is thickness of backfat angle value, unit mm, d1Between muscle and fat fascia position to condenser lens optical center away from
From d2For pig carcass exocuticle to the distance of condenser lens optical center, f is the focal length of condenser lens, l1For hot spot imaging point to key light
The distance of axis, l2For the distance of main optical axis to laser generator.
The beneficial effects of the present invention are:
The present invention proposes that the laser detecting method of pig carcass back-fat thickness can quickly and accurately measure the pig carcass thickness of backfat
Degree, measurement method measures the thickness of backfat, recording and displaying function is integrated, and reduces manual measurement and data inputting bring is missed
Difference.Which is realized simply, does not need complicated algorithm and model, and stability is high, low to operator and operating environment requirements.
Pig carcass thickness of backfat measuring probe appearance is small and exquisite to be easy to use.
Detailed description of the invention
Fig. 1 is the structure chart of the measuring probe in pig carcass back-fat thickness laser detection system of the invention；
Fig. 2 is the measuring principle figure of pig carcass back-fat thickness laser detecting method of the invention；
Fig. 3 is the controller structure diagram in pig carcass back-fat thickness laser detection system of the invention.
1, the pig carcass thickness of backfat, 2, condenser lens, 3, photoelectric sensor, 4, laser generator, 5, station meter, 6, the thickness of backfat
Spend measuring probe, 7, measurement button, 8, charactron, 9, hanging hole, 10, transparent window, 11, controller.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawings and examples, but not as
Limit.
A kind of laser detection system of pig carcass back-fat thickness, by back-fat thickness measuring probe 6, controller 11 and computer
Pig carcass back-fat thickness management system composition.
Fig. 1 shows the structure of the measuring probe in pig carcass back-fat thickness laser detection system of the invention, and Fig. 2 is this
The measuring principle figure of the pig carcass back-fat thickness laser detecting method of invention.Back-fat thickness measuring probe 6 includes optical ranging mould
Block, control module and display module, main measurement, control and the transmission for realizing the pig carcass thickness of backfat.Wherein optical ranging module
Including station meter 5, laser generator 4, bandpass filter, condenser lens 2, photodetector 3.Control module mainly includes micro- place
Manage device and analog/digital signal conversion device.Display module charactron 8 and corresponding driving circuit.
In the optical system of back-fat thickness measuring probe 6, station meter 5 is not more than with beam direction parallel, spaced-apart
10mm is conducive to reduce measurement error.Laser generator 4 is using high brightness, high directivity, high monochromaticity and high coherence
655nm red semiconductor laser generator can preferably keep ray diameter size not disperse.Bandpass filter uses
655nm plated film bandpass filter, is effectively removed the interference of stray light in back fat thickness measuring instrument working environment, to ensure that survey
Measure the stability of instrument work.Photodetector 3 uses line style photoelectric sensor, and be located at condenser lens 2 as square focal plane,
To make hot spot through optical system in line style photoelectric sensor blur-free imaging.
6 shelling machine of back-fat thickness measuring probe has transparent window 10, so that laser beam be made to be radiated at pig through window 10
Trunk exocuticle, 10 material of transparent window can be quartz glass or acryl plates, structure be it is embedded, that is, be depressed in shell
Body 5-10mm influences 10 translucency of window so that transparent window 10 when measurement effectively be avoided to be contaminated.
The housing handle design of back-fat thickness measuring probe 6 meets ergonomic designs, to reduce to the greatest extent using tool
Caused by fatigue.The upper shell design of back-fat thickness measuring probe 6 has hanging hole 9, can hang on station by spring wire
Top, to mitigate the weight of probe 6.Measurement button 7 is provided on probing shell.
The control module of back-fat thickness measuring probe 6 includes central processing unit, A/D conversion module, RS-485 communication mould
Block.A/D conversion module connects the line style photodetector 3 of optical system, to convert analog signals into digital signal and pass
It is defeated to arrive central processing unit.Communication module uses RS-485 signal communication agreement, and interface is using balance driver and differential received
The combination of device, anti-common mode interference ability enhancing, i.e., noise immunity is good.RS-485 communication module is visited for back-fat thickness measurement
It is communicated between first 6 and computer.
Microcontroller in back-fat thickness measuring probe 6 can use chip microcontroller, and single-chip microcontroller and back-fat thickness detect
System controller 11 is connected with Shielded Twisted Pair, thus effectively shielding extraneous electromagnetic signals interference.
48 segment numeral pipes can be used in 8 display module of charactron, for showing the measured value of back-fat thickness.
Fig. 3 is the controller architecture in pig carcass back-fat thickness laser detection system of the invention.Controller 11 includes driving
Dynamic level shifting circuit, RS-485 communication relay control circuit, electric fan.
Computer pig carcass back-fat thickness management system is mainly responsible for back-fat thickness data processing, record and grade judgement etc.
Function.
A kind of laser ranging detection method of pig carcass back-fat thickness proposed by the invention utilizes laser triangulation original
Reason measures pig carcass epidermis to the distance of back fat detector, as shown in Figure 2.It is designed by the structure of back-fat thickness measuring instrument head 6,
Laser beam is parallel with the key light axis of condenser lens 2 and is apart l2, the sending laser beam of laser generator 4, vertical incidence pig trunk
External epidermis simultaneously forms a point shaped laser spot in exocuticle, hot spot through condenser lens 2 formed on as square focal plane clearly as.It is logical
Analytic geometry calculating is crossed, the value of back-fat thickness 1 can be obtained:
Wherein, d is thickness of backfat angle value, unit mm.d1For 5 overall length of benchmark ruler, i.e., fascia position is to visiting between muscle and fat
The distance of first 6 condenser lens, 2 optical center.d2For pig carcass exocuticle to the distance of probe 6 condenser lens, 2 optical center.F is condenser lens
2 focal length.l1For hot spot imaging point to the distance of key light axis.l2For main optical axis to the distance of laser generator 4.
Specific step is as follows for measurement:
A) 5 end of station meter of back-fat thickness measuring probe 6 is placed in the flesh between the six, the 7th rib cages of pig carcass
At the fascia of meat and fat, and it is vertical with back fat holding to make station meter 5, while station meter 5 being made to be in contact with pig carcass section, protects
Station meter 5 is held neither to separate and do not oppress with pig carcass section.The red hot spot vertical irradiation of laser beam is outside pig carcass at this time
On epidermis
B) thumb presses the measurement button 7 on probe 6, and the single-chip microcontroller on back-fat thickness measuring probe acquires photodetector
3 signal, and by A/D conversion module, analog voltage signal is converted into digital signal, single-chip microcontroller calculates l1Value, from
And back-fat thickness is calculated by operation:
C) calculated thickness of backfat value is transferred to by the single-chip microcontroller of back-fat thickness measuring probe by RS-485 communication module
Controller 11, then controller 11 is transferred to computer pig carcass back-fat thickness management system by serial ports.
D) computer pig carcass back-fat thickness management system judges back-fat thickness data, determines the effective of data
Property, it is classified and is saved in database, while data information being returned to single-chip microcontroller again, single-chip microcontroller controls the display back of charactron 8
Fat thickness data.
Claims (12)
1. a kind of pig carcass back-fat thickness laser detection system, comprising: back-fat thickness measuring probe, controller and computer back fat
Thickness management system, it is characterised in that: the back-fat thickness measuring probe is carried on the back using laser triangulation principle measurement pig carcass
Fat thickness degree is simultaneously shown.
2. a kind of pig carcass back-fat thickness laser detection system as described in claim 1, it is characterised in that: the back-fat thickness
Measuring probe includes optical ranging module, control module and display module.
3. a kind of pig carcass back-fat thickness laser detection system as claimed in claim 2, it is characterised in that: the optics is surveyed
It include station meter, laser generator, bandpass filter, photodetector and condenser lens away from module, the bandpass filter has
Effect ground removes the interference of stray light in the thickness of backfat measuring probe working environment, and it is saturating that the photodetector is located at the focusing
Mirror as square focal plane, the laser beam of the laser generator transmitting is parallel with the key light axis of the condenser lens.
4. a kind of pig carcass back-fat thickness laser detection system as claimed in claim 3, it is characterised in that: the laser occurs
Device emits the laser of high brightness, high directivity, high monochromaticity and high coherence.
5. a kind of pig carcass back-fat thickness laser detection system as claimed in claim 3, it is characterised in that: the station meter with
The laser beam is parallel, and interval is not more than 10mm, and the laser beam and the station meter keep horizontal when use.
6. a kind of pig carcass back-fat thickness laser detection system as claimed in claim 2, it is characterised in that: the control module
Including microprocessor and analog/digital signal conversion device.
7. a kind of pig carcass back-fat thickness laser detection system as claimed in claim 2, it is characterised in that: the display module
Including one 48 segment numeral pipes and corresponding driving circuit.
8. a kind of pig carcass back-fat thickness laser detection system as described in claim 1, it is characterised in that: the controller packet
Include level shifting circuit and signal control transmission module.
9. a kind of pig carcass back-fat thickness laser detection system as described in claim 1, it is characterised in that: the computer back
Fat thickness degree management system determines for back-fat thickness data validation, record and grade.
10. a kind of pig carcass back-fat thickness laser detection system as described in claim 1, it is characterised in that: the thickness of backfat
It spends data transmission between measuring probe and the computer back-fat thickness management system and uses RS-485 communications protocol.
11. a kind of pig carcass back-fat thickness laser detecting method, it is characterised in that: measure pig trunk using laser triangulation principle
Body back-fat thickness.
12. a kind of pig carcass back-fat thickness laser detecting method as claimed in claim 11, it is characterised in that: laser generator
Laser beam is issued, vertical incidence pig carcass exocuticle simultaneously forms point shaped laser spot in exocuticle, and hot spot is through condenser lens as side
It is formed on focal plane clearly as laser beam is parallel with condenser lens key light axis, is calculated by analytic geometry, can obtain the thickness of backfat
Angle value:
Wherein, d is thickness of backfat angle value, unit mm, d1It is muscle between fat at a distance from fascia position to condenser lens optical center, d2
For pig carcass exocuticle to the distance of condenser lens optical center, f is the focal length of condenser lens, l1For hot spot imaging point to key light axis
Distance, l2For the distance of main optical axis to laser generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330725.1A CN109253701A (en) | 2018-11-09 | 2018-11-09 | Pig carcass back-fat thickness laser detection system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811330725.1A CN109253701A (en) | 2018-11-09 | 2018-11-09 | Pig carcass back-fat thickness laser detection system and method |
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| CN109253701A true CN109253701A (en) | 2019-01-22 |
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| CN201811330725.1A Pending CN109253701A (en) | 2018-11-09 | 2018-11-09 | Pig carcass back-fat thickness laser detection system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114403023A (en) * | 2021-12-20 | 2022-04-29 | 北京市农林科学院智能装备技术研究中心 | Pig feeding method, device and system based on terahertz fat thickness measurement |
| CN114518072A (en) * | 2022-02-22 | 2022-05-20 | 江苏铁锚玻璃股份有限公司 | Device applied to transparent part thickness detection and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114403023A (en) * | 2021-12-20 | 2022-04-29 | 北京市农林科学院智能装备技术研究中心 | Pig feeding method, device and system based on terahertz fat thickness measurement |
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Application publication date: 20190122 |