CN101498678B - Apparatus and method for detecting electrical-physical characteristics of livestock product - Google Patents
Apparatus and method for detecting electrical-physical characteristics of livestock product Download PDFInfo
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- CN101498678B CN101498678B CN2009100781274A CN200910078127A CN101498678B CN 101498678 B CN101498678 B CN 101498678B CN 2009100781274 A CN2009100781274 A CN 2009100781274A CN 200910078127 A CN200910078127 A CN 200910078127A CN 101498678 B CN101498678 B CN 101498678B
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Abstract
The invention discloses a livestock product electrophysical characteristic detecting device and a method for detecting the livestock product electrophysical characteristic. The livestock product electrophysical characteristic detecting device comprises a high-frequency crystal oscillator, a probe, a signal processing unit and a power supply circuit; the high-frequency crystal oscillator is used for generating continuous high-frequency pulse signals and transmitting the high-frequency pulse signals to the probe; the probe is inserted into a livestock meat product to be measured and when the probe receives the high-frequency pulse signals, voltage signals with stable amplitude change are generated by the probe and a high-frequency coaxial cable, and the amplitudes of the voltage signals arerelated to the electrophysical characteristic of the livestock product; the signal processing unit is used for detecting the waves of the voltage signals generated by the probe, converting reference signals generated by the high-frequency crystal oscillator to stable DC voltage signals in a two-stage differencing and amplifying way and outputting the stable DC voltage signals; and the power supply circuit is used for supplying power to the high-frequency crystal oscillator and the signal processing unit. The invention can detect the electrophysical characteristic of the livestock product, hasfavorable performance-price ratio and stability, can be more conveniently integrated in other detecting systems due to the output of the DC voltage signals, has more efficiency and is more convenientto use.
Description
Technical field
The present invention relates to livestock products detection technique field, particularly relate to the pick-up unit and the method for a breeding stock meat product dielectric property.
Background technology
Fresh and alive livestock products generally all need through cadaveric rigidity, maturation, self-dissolving and corrupt four-stage after slaughtering.As time goes on, the structural constituent and the structure of poultry meat will constantly take place to change, and these variations will directly reflect the quality situation of raiseeing meat.And the change of poultry meat internal component and structure also affects global tissue thing electrical characteristics, the thing electrical characteristics of quality under different conditions of poultry meat tissue have different difference, and therefore the thing electrical characteristics of research poultry meat product help the quality situation of change of poultry meat is made assessment accurately.
Research means and method aspect the corrupt Changing Pattern of poultry meat product is more at present, as: Chinese patent the 200410013836.1st has been announced agricultural and animal products lossless detection method and the device thereof based on electronics vision and sense of smell integration technology, by to appearance characteristics and its sense of smell information fusion such as smell of distributing such as the color of agricultural and animal products, shape, texture, sizes in various periods, and then with knowledge base in expertise and experience merge, carry out comprehensive distinguishing.Chinese patent the 200610097857.5th has been announced agricultural and animal products lossless detection method and the device based on hyper-spectral image technique, realizes quick and precisely obtaining the relevant Q factor situation of agricultural product by the spectrum picture technology.Chinese patent 92231926.X has announced a kind of digital display type meat detector, and this detecting head contains eight probes, is basic with the capacitance measurement, and after the analysis detecting head inserted tested meat, the size of meat conductivity was from the quality of the big I judgement of numeral meat.People such as domestic Fang Haitian adopt the bio-electrical impedance measuring instrument that the variation that ox kills back muscle bioelectric impedance value is studied, and find that impedance value and other parameters present correlativity.(ox kills back muscle bioelectric impedance value, pH value, the variation of percentage of water loss and the research of mutual relationship, Food Science, 2008,209 (06) for Fang Haitian, Liu Huiyan etc.).
Meat putrid and deteriorated is to the corrupt decomposable process of meat protein under the actings in conjunction such as microbial protease and endopeptidase.Be accompanied by corrupt aggravation, obvious variation all can take place in the sensory trait of meat, the characteristic of corrupt decomposition product and content, number of bacteria etc.The poultry different phase of meat product after it is butchered, the institutional framework that it is inner and the variation of related chemical constituents will have influence on the change of the thing electrical characteristics (as: impedance, electricity lead etc.) of poultry meat product.
The variation of poultry meat product is the physics and the chemical change process of comprehensive many aspects, and the correlation technique that adopts is at present raiseeed the method that meat product is analyzed, general cost is relatively costly, and most of technology all is difficult to carry out the analysis of meat interior change situation.
Summary of the invention
The problem that the embodiment of the invention will solve provides the pick-up unit and the method for a breeding stock meat product dielectric property, can in 1～2 second, finish measurement fast, and antijamming capability is strong to poultry meat example dielectric characteristic parameter, applied widely, production cost is low, is easy to produce in batches and promote.
For achieving the above object, the technical scheme of the embodiment of the invention provides the pick-up unit of a breeding stock meat product dielectric property, and described device comprises: the high frequency crystal oscillator is used to produce lasting high-frequency pulse signal, and is transferred to probe by coaxial cable for high frequency; Probe inserts in the poultry meat product to be measured, after receiving described high-frequency pulse signal, forms the stable voltage signal of changes in amplitude on described probe and coaxial cable for high frequency, and the dielectric property of poultry meat product is relevant between the amplitude of described voltage signal and the probe; Described probe comprises the probe and a plurality of peripheral probe that are positioned at the center; Signal processing unit is used for the voltage signal that described probe produces is carried out detection, and amplifies by two-stage differential with reference signal that the high frequency crystal oscillator is produced and to be converted to d. c. voltage signal output stably; Power circuit is used to described high frequency crystal oscillator and signal processing unit that power supply is provided.
Wherein, described probe also comprises: base and insulation course, described a plurality of peripheral probe evenly distributes around the described probe that is positioned at the center, and insulate by insulation course with the described probe that is positioned at the center, described probe and insulation course are fixed on the base, described a plurality of peripheral probes and base mutual conduction.
Wherein, described peripheral probe is 3.
Wherein, the material of described probe and base is a stainless steel.
Wherein, described signal processing unit comprises: first order operational amplification circuit, and the reference signal that voltage signal that described probe is produced and high frequency crystal oscillator send carries out calculus of differences, obtains stable and accurate voltage after the probe measurement; Second level operational amplification circuit, the voltage that described first order operational amplification circuit is obtained amplifies, and exports stable and the positively related voltage signal of poultry meat product dielectric property.
The technical scheme of the embodiment of the invention also provides the detection method of a breeding stock meat product dielectric property, said method comprising the steps of: will comprise that one is arranged in the probe of center and the probe of a plurality of peripheral probes is inserted into poultry meat product to be measured, system powers on, and begins to measure; Produce the high-frequency signal of fixed frequency by the high frequency crystal oscillator, and be transferred to probe, and on coaxial cable for high frequency and probe, form the stable voltage signal of changes in amplitude by coaxial cable for high frequency; Described voltage signal is converted to stable voltage signal output after carrying out the difference amplification through signal processing unit; According to the corresponding relation between voltage and the poultry meat product dielectric property, obtain the dielectric property of described poultry meat product.
Compared with prior art, technical scheme of the present invention has following advantage:
The dielectric property of energy measurement poultry meat product of the present invention owing to adopt mimic channel to realize the comprehensive detection of dielectric property, therefore has good cost performance and stability; The output of direct current signal makes being integrated in the middle of other detection systems that it can be convenient, and efficient is higher, uses easier.
Description of drawings
Fig. 1 is the structural drawing of the pick-up unit of a breeding stock meat product dielectric property of the present invention;
Fig. 2 is the front end probe structure figure of the pick-up unit of poultry meat product dielectric property of the present invention;
Fig. 3 is the structural drawing of signal processing unit of the pick-up unit of poultry meat product dielectric property of the present invention;
Fig. 4 is the process flow diagram of the detection method of a breeding stock meat product dielectric property of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The present invention is based on ADR (Amplitude-domain reflectometry, amplitude domain reflectometry), and ADR is a kind of method that soil dielectric constant is measured that is applied to.ADR is transferred to the parallel metal probe that inserts in the object to be measured with the high frequency crystal oscillator launching electromagnetic wave of fixed frequency by concentric cable.The reflection wave and the incident wave in that probe end produced of high-frequency impulse will form the stable voltage signal of changes in amplitude on concentric cable, and the dielectric property of measurand is relevant between this signal amplitude and the parallel probe.And the dielectric property of object can reflect that the dielectric loss of object, medium absorb and dielectric relaxation, and all very important for the structure of analyzing molecules and solid, the character of chemical bond and the rotation of molecule, the vibration of ion etc.
The present invention regards probe the part of high frequency coaxial transmission line as, when high-frequency signal during by this group parallel probe, will form a uniform electric field around the center probe, and the dielectric property of raiseeing meat between the impedance of probe portion and the parallel probe is relevant; By the stable alternating voltage that forms on measuring probe and the coaxial cable for high frequency, can reflect the residing different conditions of poultry meat product.
The pick-up unit of a breeding stock meat product dielectric property of the present invention comprises as shown in Figure 1:
High frequency crystal oscillator 1 is connected with probe 3 by coaxial cable for high frequency 2.The stable high-frequency signal that high frequency crystal oscillator 1 is produced is sent to probe 3 by coaxial cable for high frequency 2, will produce reflected signal on the probe 3 and superposes with incoming signal, forms stable alternating voltage.
Signal processing unit 4 links to each other with coaxial cable for high frequency 2 with high frequency crystal oscillator 1, and the signal that forms is carried out difference processing and analysis, is converted to galvanic current pressure signal after treatment.
The front end probe structure of the pick-up unit of poultry meat product dielectric property of the present invention as shown in Figure 2, probe 3 is by 6,3 peripheral stainless steel probes 7 of center stainless steel probe, stainless steel firm banking 8, insulation course 9 are formed jointly; 3 peripheral stainless steel probes 7 evenly distribute around center stainless steel probe 6, are that the mutual angle of round dot is 60 degree with the center, and are insulated by insulation course 9 with the center probe.Probe 6,7 and insulation course 9 are fixed on the stainless steel probe base 8, mutual conduction between 3 stainless steel probes 7 and between probe 7 and the base 8.
The structure of the signal processing unit of the pick-up unit of poultry meat product dielectric property of the present invention as shown in Figure 3, the reference signal that stable alternating voltage signal and high frequency crystal oscillator are produced enters the II level signal amplification circuit of being made up of operational amplifier 10 after carrying out the difference processing of signal through the I level difference amplifying circuit of being made up of operational amplifier 10.Exporting a galvanic current at last presses.
High frequency crystal oscillator 1 in the present embodiment adopts the active crystal oscillator of 100MHz, can produce stable high-frequency signal.Probe 3 adopts the stainless steel design, and the probe length that can insert the soil part is 52mm, and probe diameter 2mm, probe also can customize according to user's request.Coaxial cable for high frequency adopts 50 ohm of standard coaxial cables for high frequency, and is two-layer inside and outside being divided into, and internal layer is the signal conduction, and skin is a screen layer.The coaxial cable for high frequency internal layer is connected with signal processing unit with center probe 6, and outer screen layer joins simultaneously with peripheral probe 7 and power supply ground.
The detection method of a breeding stock meat product dielectric property of the present invention may further comprise the steps as shown in Figure 6:
High frequency crystal oscillator 1 produces the high-frequency signal of a fixed frequency, is transferred to probe 3 by coaxial cable for high frequency 2.High-frequency signal will produce a stable electric field at center probe 6 with on its 3 stainless steel probes 7, and produce reflected signal.Reflected signal and incident high-frequency signal produce stack, thereby form stable alternating voltage.The twin-stage differential amplifier circuit that signal processing unit 4 is formed by operational amplifier 10 is handled signal, and the DC voltage after the conversion is externally exported.
The high-frequency signal that the present invention utilizes the high frequency crystal oscillator to be produced excites concentric cable to produce stable alternating voltage signal under different impedance operators, by measuring the amplitude of this signal, can realize the measurement to poultry meat product dielectric parameter; Utilize the present invention can finish fast to raiseeing the analysis of meat product quality.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the pick-up unit of a breeding stock meat product dielectric property is characterized in that, described device comprises:
The high frequency crystal oscillator is used to produce lasting high-frequency pulse signal, and is transferred to probe by coaxial cable for high frequency;
Probe inserts in the poultry meat product to be measured, after receiving described high-frequency pulse signal, forms the stable voltage signal of changes in amplitude on described probe and coaxial cable for high frequency, and the dielectric property of poultry meat product is relevant between the amplitude of described voltage signal and the probe; Described probe comprises the probe and a plurality of peripheral probe that are positioned at the center;
Signal processing unit is used for the voltage signal that described probe produces is carried out detection, and amplifies by two-stage differential with reference signal that the high frequency crystal oscillator is produced and to be converted to d. c. voltage signal output stably;
Power circuit is used to described high frequency crystal oscillator and signal processing unit that power supply is provided.
2. the pick-up unit of poultry meat product dielectric property as claimed in claim 1, it is characterized in that, described probe also comprises: base and insulation course, described a plurality of peripheral probe evenly distributes around the described probe that is positioned at the center, and insulate by insulation course with the described probe that is positioned at the center, described probe and insulation course are fixed on the base, described a plurality of peripheral probes and base mutual conduction.
3. the pick-up unit of poultry meat product dielectric property as claimed in claim 2 is characterized in that, described peripheral probe is 3.
4. the pick-up unit of poultry meat product dielectric property as claimed in claim 2 is characterized in that, the material of described probe and base is a stainless steel.
5. the pick-up unit of poultry meat product dielectric property as claimed in claim 1 is characterized in that, described signal processing unit comprises:
First order operational amplification circuit, the reference signal that voltage signal that described probe is produced and high frequency crystal oscillator send carries out calculus of differences, obtains stable and accurate voltage after the probe measurement;
Second level operational amplification circuit, the voltage that described first order operational amplification circuit is obtained amplifies, and exports stable and the positively related voltage signal of poultry meat product dielectric property.
6. the detection method of a breeding stock meat product dielectric property is characterized in that, said method comprising the steps of:
To comprise that one is arranged in the probe of center and the probe of a plurality of peripheral probes is inserted into poultry meat product to be measured, system powers on, and begins to measure;
Produce the high-frequency signal of fixed frequency by the high frequency crystal oscillator, and be transferred to probe, and on coaxial cable for high frequency and probe, form the stable voltage signal of changes in amplitude by coaxial cable for high frequency;
Described voltage signal is converted to stable voltage signal output after carrying out the difference amplification through signal processing unit;
According to the corresponding relation between voltage and the poultry meat product dielectric property, obtain the dielectric property of described poultry meat product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100781274A CN101498678B (en) | 2009-02-17 | 2009-02-17 | Apparatus and method for detecting electrical-physical characteristics of livestock product |
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| CN2009100781274A CN101498678B (en) | 2009-02-17 | 2009-02-17 | Apparatus and method for detecting electrical-physical characteristics of livestock product |
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| CN101498678B true CN101498678B (en) | 2010-12-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205246587U (en) * | 2015-12-18 | 2016-05-18 | 深圳市前海康启源科技有限公司 | A portable instrument for detecting edible new freshness of meat |
| CN110262319A (en) * | 2019-05-31 | 2019-09-20 | 郑州智康科技有限公司 | A kind of long-distance monitorng device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665302A (en) * | 1969-02-24 | 1972-05-23 | Nat Res Dev | Methods and apparatus for determining the condition of food |
| EP0499765A1 (en) * | 1991-02-19 | 1992-08-26 | Slagteriernes Forskningsinstitut | A method and apparatus for determining and/or evaluating quality characteristics of a body of meat material |
| CN2134651Y (en) * | 1992-08-28 | 1993-05-26 | 广州军区后勤部军事医学研究所 | Meat quality detector having digital display |
| CN2184205Y (en) * | 1993-11-10 | 1994-11-30 | 贺德华 | Tester for meat deterioration and its water content |
| DE4401147A1 (en) * | 1994-01-17 | 1995-07-20 | Sigma Electronic Gmbh Erfurt I | Classifying quality of meat |
| US5872314A (en) * | 1997-07-25 | 1999-02-16 | Clinton; Robert P. | Method and apparatus for measuring characteristics of meat |
| ES2130939A1 (en) * | 1996-06-04 | 1999-07-01 | Nte Sa | Apparatus for monitoring the technological quality of meat |
| CN2847282Y (en) * | 2005-09-30 | 2006-12-13 | 湖南文理学院 | Novel textile fiber water content detector |
-
2009
- 2009-02-17 CN CN2009100781274A patent/CN101498678B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665302A (en) * | 1969-02-24 | 1972-05-23 | Nat Res Dev | Methods and apparatus for determining the condition of food |
| EP0499765A1 (en) * | 1991-02-19 | 1992-08-26 | Slagteriernes Forskningsinstitut | A method and apparatus for determining and/or evaluating quality characteristics of a body of meat material |
| CN2134651Y (en) * | 1992-08-28 | 1993-05-26 | 广州军区后勤部军事医学研究所 | Meat quality detector having digital display |
| CN2184205Y (en) * | 1993-11-10 | 1994-11-30 | 贺德华 | Tester for meat deterioration and its water content |
| DE4401147A1 (en) * | 1994-01-17 | 1995-07-20 | Sigma Electronic Gmbh Erfurt I | Classifying quality of meat |
| ES2130939A1 (en) * | 1996-06-04 | 1999-07-01 | Nte Sa | Apparatus for monitoring the technological quality of meat |
| US5872314A (en) * | 1997-07-25 | 1999-02-16 | Clinton; Robert P. | Method and apparatus for measuring characteristics of meat |
| CN2847282Y (en) * | 2005-09-30 | 2006-12-13 | 湖南文理学院 | Novel textile fiber water content detector |
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