CN103487508A - High-precision ultrasonic liquid difference identification device for food safety - Google Patents
High-precision ultrasonic liquid difference identification device for food safety Download PDFInfo
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- CN103487508A CN103487508A CN201210192871.9A CN201210192871A CN103487508A CN 103487508 A CN103487508 A CN 103487508A CN 201210192871 A CN201210192871 A CN 201210192871A CN 103487508 A CN103487508 A CN 103487508A
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Abstract
The invention discloses a high-precision ultrasonic liquid difference identification device for food safety. The identification device comprises two detachable ultrasonic sending and receiving sensors, a signal processing chip, a display screen and a key. The signal processing chip comprises a frequency and power adjustable sending circuit, a receiving circuit which can perform noise reduction, amplification, oversampling and filtering, a sigma-delta AD modulator, an adjustable digital filter circuit, a high-speed memory and a memory access interface thereof, a wireless sending module, a microprocessor and a crystal oscillator. Through use of the identification device, when ultrasonic waves pass through liquids, high-precision extraction of signals can be performed, through comparison of the signal characteristic values corresponding different substances, differences among the substances can be distinguished, and in food safety, fake and poor quality liquid food can be effectively distinguished. At the same time, although a plurality of high-precision signal processing circuits are integrated on one single chip, the chip area is small, so that the identification device is small in volume and portable, and is suitable for personals and families.
Description
[technical field]
The present invention relates to integrated circuit (IC) design technology, ultrasonic sensor application technology and food safety detection field, be specifically related to a kind of high-precision ultrasonic liquid otherness identifier that is applied to food security, in conjunction with the ultrasonic sensor technology, thereby but realize that by integrated circuit (IC) design the high-precision signal processing is to liquid type food evident.
[background technology]
China's food safety affair occurs again and again in recent years, startling.Because food safety detection mainly adopts biochemical analysis and spectroscopic analysis methods, the process complexity, equipment is huge, need to carry out in specific laboratory, mainly contains government's relevant portion and is supervised.And the many ground of Chinese people is wide, the food consumption of every day is huge, and government's part can't be accomplished careful detection and supervision comprehensively, so that a lot of illegal retailer is able to savage manufacturing and marketing fake, though national people are poisoned deeply, can only state also, and must not solve.How fundamentally to solve food security hidden danger, we think needs a food safety detection system that the whole people can participate in, and it hinders that people carry out food safety supervision, is that do not have can be by the widely used instrument that can identify counterfeit and shoddy goods of people.
Through investigation, find, the research of China aspect food safety detection all mainly concentrates on aspects such as adopting chemical means and spectral analysis, and such mode is not suitable for ruck.What people paid close attention to simultaneously is not composition and the content of certain material, and too specialty is difficult by masses' understanding and acceptance for this.How much in fact and be indifferent to people wish that an instrument tells that they are false or true, are good or good or poor getting final product, to concrete which kind of content of material, be.So adopt the advantage of the physical means of non-quantitative and qualitative analysis identification non-chemically to be embodied.As based on modes such as light, electricity, sound waves, realized the Non-Destructive Testing of tested physics, at the food security instrument, there is certain value aspect universal.
This patent is based on the ultrasonic sensor technology, it is a kind of acoustic characteristic analytic approach that ultrasonic technology is mainly used in ultrasonic technology at present, its principle is that ultrasound wave is when detected Propagation, the variation meeting of the acoustic characteristic of medium and interior tissue produces certain impact to hyperacoustic propagation, by the detection to ultrasound wave degree of susceptibility and situation, can understand dielectric behavior and structural change.Weak ultrasound wave is because energy is low, there is not damaged, non-intrusion type, without preparing the advantages such as sample and fast detecting, mainly be used at present the detection of fat content detection, sugar in dairy produce, in cereal product, the detection of concrete a certain composition in the medium such as hydrocarbon mixture detection, do not appear at the application of food synthetic quality context of detection.
The present invention proposes a kind of ultrasonic liquid otherness identifier that is applied to food security, this instrument mainly is absorbed in how the ultrasonic signal after liquid is carried out to high-precision extraction aspect, in conjunction with the integrated circuit (IC) design technology, integrated multi-signal processing module.By the characteristic of comparison ultrasonic signal after different liquids, thereby realize the differentiation to different liquids.People can upgrade by interface or wireless receiving and dispatching the standard value of the ultrasonic signal feature of plurality of liquid based food, thereby whether the identification food of purchasing is genuine piece.
[summary of the invention]
The objective of the invention is to propose a kind of ultrasonic liquid otherness identifier that is applied to food security, be applicable to the general population and carry out food safety detection.
For achieving the above object, the present invention proposes a kind of ultrasonic liquid otherness identifier that is applied to food security, and described identifier is comprised of two pairs of discrete detachable ultrasonic transmission/reception sensor, signal processing chip, display screen and buttons.
Between described ultrasonic transmission/reception sensor, distance is adjustable, and a pair of ultrasonic transmission/reception sensor is for range calibration, and a pair of ultrasonic transmission/reception sensor is for detection of testee; , for guaranteeing that between two pairs of sensors, distance is identical, with sensor on one side, by a stationary shaft, connect simultaneously, it is on identical position;
The ultrasonic transmit circuit that described signal processing chip is adjustable by frequency power, but the receiving circuit of noise reduction, amplification, over-sampling and filtering, high precision sigma-delta AD modulator, high precision adjustable digital filtering circuit, high-speed memory and memory access interface thereof, wireless sending module, microprocessor and crystal oscillator form;
Described ultrasonic transmit circuit is comprised of frequency dividing circuit, power adjusting circuit and on-off circuit, and its transponder pulse frequency and power can be arranged by microprocessor; Ultrasonic energy is weak ultrasonic wave range, testee is not caused to damage;
Described ultrasound wave receiving circuit comprises the bandpass filter for noise reduction process, signal amplification module, over-sampling and filtering processing module.Process by the noise reduction to signal and amplification, can obtain the signal that quality is higher, process by over-sampling and filtering, can high precision retain original analog;
Described high precision sigma-delta AD modulator can convert oversampled signals to digital signal, and keeps high-resolution and signal to noise ratio (S/N ratio);
Described high precision adjustable digital filtering circuit receives from carrying out from the signal of sigma-delta AD modulator filtering and signal reduction processing, and the filter parameter of this wave filter can be arranged by microprocessor;
Described high-speed memory is for storing different liquids ultrasound wave warp signal characteristic value later under different temperatures, and the real-time storage current measurement value.High-speed memory can be supported the quick storage of a large amount of signals after over-sampling is processed, and for microprocessor and memory access interface, conducts interviews;
Described memory access interface and wireless sending module, can deliver to local data other terminal or more new data is extremely local;
Described microprocessor is mainly used in system and controls and signal analysis, and system control comprises according to the user to be inputted modules is arranged, as pulsed frequency and the power of ultrasonic transmit circuit, digital filter parameter, environment temperature etc.Control data simultaneously and carry out data interaction by memory access interface or wireless sending module and other terminal, start and measure and signal analysis, control and show output etc.; Signal analysis is mainly calculated velocity of propagation, decay and the impedance of ultrasonic signal in testee according to detection signal, and the row distance of going forward side by side is proofreaied and correct, and then these values and corresponding standard value is compared, and draws the true and false, the quality of object being measured, and shows;
Described button is power switch.
The invention has the beneficial effects as follows: the present invention proposes a kind of ultrasonic liquid otherness identifier that is applied to food security.Described identifier is by the signal of high-precision extraction ultrasound wave after liquid, and signal characteristic value corresponding to comparison different material distinguished the otherness of material, for liquid type food fake and forged in food security, can effectively distinguish.Beneficial effect of the present invention has:
1, adopt the integrated more high-precision signal treatment circuit of single integrated chip, and carry out configurable design, make the gained signal accuracy higher, applied widely, can effectively distinguish different material;
2, adopt ic manufacturing technology to make chip area less, thereby the identifier volume is little, portable, be applicable to individual and family;
3, non-chemical method, adopt weak this physical detection means of ultrasonic signal, all lossless to testee and instrument itself;
4, non-qualitative and quantitative detection, be absorbed in difference, meets people's understanding and demand.
[accompanying drawing explanation]
Fig. 1 is a kind of system chart that is applied to the ultrasonic liquid otherness identifier of food security;
Fig. 2 is the signal processing chip system diagram;
Fig. 3 is the ultrasonic transmit circuit structural drawing;
Fig. 4 is ultrasound wave receiving circuit structural drawing;
Fig. 5 is the identifier workflow;
[embodiment]
The application's feature and advantage will be by embodiment, in conjunction with the accompanying drawings.
In the food safety detection field, the application based on ultrasonic technology does not almost have, and the research of the ultrasonic characteristic of the food of the food composition content analysis based on ultrasonic technology and variable concentrations and density has some mechanisms carrying out correlative study.As there was paper publishing in Food Quality and Safety research institute of Shanghai Polytechnics at aspects such as the ultrasonic characteristic of butterfat content, meat quality Ultrasonic Detection respectively in 2011; University Of Tianjin was having research in 2007 aspect Principal Milk Constituents ultrasonic characteristic and temperature impact, and had paper and patent to deliver; Zhejiang University is having research in 2005-2006 aspect food liquid transonic characteristic and quality ultrasonic detecting technology; Also have Shaanxi Normal University, South China Science & Engineering University, Tongji University etc. that correlative study is also being arranged aspect the ultrasonic characteristic of liquid.Find by analysis, the paper that these research institutions deliver and patent all focus on the model investigation aspect of setting up liquid component, concentration or density and its Ultrasonic characteristics, its patent also mostly is the detection system for this model, there is certain limitation, can not be widely used in food inspection and analysis.
The present invention proposes a kind of ultrasonic liquid otherness identifier that is applied to food security, for the food safety detection of individual or family.This patent does not rely on the Ultrasonic characteristics model of certain testee, not limited by the testee kind, be absorbed in the difference analysis of different testees, its gordian technique point concentrates on how to carry out the identification of otherness, how to realize high-precision signal extraction.
Ultrasonic signal its amplitude after ultrasonic sensor receives and converts electric signal to, in the microvolt magnitude, belongs to the small-signal category.How extracting such small-signal and making resolution is at least the difficult point of research in this magnitude of microvolt.Analyze current existing high-precision signal extracting method, the technology of employing mainly contains amplifying circuit, filtering, high-precision high-speed ADC etc.It is integrated that these signal acquiring systems mostly are the plate level of discrete component, in the transmission of plate DBMS, loss arranged, and signal is had to certain distortion effect.Still adopt prior art in this patent, integrated signal amplifies processing, filtering, high-precision high-speed ADC, and the modules such as relevant power supply, clock, control, storage.Adopt the integrated circuit (IC) design technology, signal high precision extraction and analyzing and processing circuit are integrated on monolithic chip, reduced the distortion effect that between each circuit, the signal transmission is introduced, adopt parameterized design on circuit design simultaneously, make system there is dirigibility and configurability, applicable to detection in a big way.
As shown in Figure 1,100 is a kind of system chart that is applied to the ultrasonic liquid otherness identifier of food security.101 is sonac, and 102 is fluid to be measured, and 103 for fixing the stationary shaft of two ultrasonic sensors, and 104 is signal processing chip, and 105 is button, and 106 is display screen, and 107 is other terminal, as PC, mobile phone, high in the clouds etc.
Described signal processing chip 104 as shown in Figure 2, by ultrasonic transmit circuit 201, ultrasound wave receiving circuit 202, sigma-delta AD modulator 203, digital filter 204, high-speed memory 205, storage memory access interface 206, wireless sending module 207, microprocessor 208 and crystal oscillator 209 form.201 under 208 control, produce the pulse signal of characteristic frequency and power, excitation ultrasound wave sensor emission ultrasound wave, 202 under 208 control with the 201 simultaneously receptions of start signal, after base conditioning through 202 parts to signal, deliver in high-precision 203 and carry out the oversampled signals that analog to digital conversion obtains 1bit, 204 carry out filtering to the signal of characteristic frequency and signal recovers through 201 configurations, store in then under 201 control, delivering to high-speed memory.While 201 is reading out data from high-speed memory constantly, the time that the ultrasonic signal that detection receives arrives and the amplitude of signal, and after these two values are carried out to distance correction, with the ultrasonic signal eigenwert of true or measured this material of matter, compare, draw the gap between measured matter and true or the measured material of matter, thereby can assess the quality of measured matter, effectively identify fake and forged material.
More signal processing circuit that described signal processing chip 104 is integrated, and circuit is carried out to configurable design, make the identifier accuracy of detection adjustable, the scope of application is wider.For different measured matters, obtain the ultrasonic signal eigenwert of the quality product of this material by storage memory access interface 206 or wireless sending module 207, the type of user by selecting measured matter, 201 modules are carried out corresponding parameter configuration according to the type of measured matter to each circuit of system, then start detection, and the ultrasonic signal eigenwert of the testing result that obtains and quality product is compared and just can be identified the true and false quality of measured matter.
As shown in Figure 3, by frequency dividing circuit 301, power adjusting circuit 302 and on-off circuit 303 form described ultrasonic transmit circuit 201.301 receive the local oscillator clock from crystal oscillator 209, and the configuration according to 201 produces corresponding frequency-dividing clock, carry out power amplification through 302, and enlargement factor is by 201 configurations, finally by 303, signal are exported when 201 open detection.This patent is supported the detachable of ultrasonic sensor 101, and the ultrasonic sensor of replaceable different natural frequencies, make by configuring 301 the driving pulse that produces corresponding frequencies, can select applicable sensor for predetermined substance, thereby improve accuracy of detection.For ultrasound wave is absorbed to larger measured matter, in order to improve the intensity of receiving end signal, can carry out the power enhancing by power regulation module.
Described ultrasound wave receiving circuit 202 as shown in Figure 4, by bandpass filter 401, amplifying circuit 402, over-sampling circuit 403, low-pass filter 404 forms.The frequency of the ultrasonic signal received can't change in communication process, and the ultrasonic signal frequency received equals the natural frequency of ultrasonic sensor.But this is ideal situation, in communication process, can introduce the noise of other frequency range, ultrasonic signal belongs to the category of small-signal, if directly the signal received is amplified to processing, noise also can be exaggerated so, affects follow-up accuracy of detection, so need to before amplifying, noise effectively be removed.This patent adopts is that the bandpass filter of frequency centered by the natural frequency of ultrasonic sensor retains the signal of natural frequency, the target signal filter of other frequency, thus reach the purpose of noise reduction.Then through amplifying circuit 402, small-signal is amplified, then obtain by the signal of height over-sampling through the processing of over-sampling 403 and low-pass filter 404, this signal has farthest retained the raw information of simulating signal.
The signal of over-sampling is sent into to the digital signal that sigma-delta AD modulator 203 obtains 1bit, then carry out the signal recovery through 204, obtain the digital signal that many bits mean.In under 208 control, the digital signal of these many bits being sent into to high-speed memory, and read in real time this data analysis.
Control and the signal analysis of described microprocessor 208 main completion systems, system control comprises according to the user to be inputted modules is arranged, as pulsed frequency and the power of ultrasonic transmit circuit, digital filter parameter, environment temperature etc.Control data simultaneously and carry out data interaction by memory access interface or wireless sending module and other terminal, start and measure and signal analysis, control and show output etc.; Signal analysis is mainly calculated velocity of propagation, decay and the impedance of ultrasonic signal in testee according to detection signal, and the row distance of going forward side by side is proofreaied and correct, and then these values and corresponding standard value is compared, and draws the true and false, the quality of object being measured, and shows.Its workflow as shown in Figure 5, is divided into altogether 7 steps:
S1: power on, by button 105, open identifier;
S2: new data more, microprocessor 208 is controlled memory access interfaces 206 or wireless sending module 207 is communicated by letter with extraneous, and the signal characteristic value by new high-quality material after ultrasonic propagation downloads to this locality, in order to compare during detection;
S3: after in determining storage, the ratio logarithm value of measured matter being arranged, the user selects the type of measured matter and current environmental temperature is set;
S4: system is selected the measured matter type according to the user, configures the parameter of inner modules;
S5: start detection, the Pulse forming line switch that is about to ultrasonic transmit circuit 201 is opened, and starts ultrasound wave receiving circuit 202 and start to receive data, and 205 pairs of control stores receive data and are stored simultaneously;
S6: microprocessor conducts interviews to storer simultaneously, detect the time that ultrasonic signal receives, and, when ultrasonic signal having been detected, its amplitude is assessed, obtained after travel-time and range value the signal characteristic value after ultrasonic propagation with the high-quality material and compared;
S7: comparison result is shown.
Described crystal oscillator 209 provides the clock of work for modules in system.
The present invention, in conjunction with Supersonic, integrated circuit (IC) design technology and signal high precision acquisition technique, has proposed a kind of ultrasonic liquid otherness identifier that is applied to food security.Described identifier has that precision is high, configurable, volume is little and to testee and the characteristics such as instrument is lossless.Described identifier is not limited by measuring object simultaneously, and the scope of application is wider, and physical means detects easy to be direct, is easy to popularize, and non-qualitative and quantitative detection, be absorbed in difference, meets people's understanding and demand.
Above content is in conjunction with embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. a ultrasonic liquid otherness identifier that is applied to food security, described identifier is comprised of two pairs of discrete detachable ultrasonic transmission/reception sensor, signal processing chip, display screen and buttons.It is characterized in that:
Between described ultrasonic transmission/reception sensor, distance is adjustable, and a pair of ultrasonic transmission/reception sensor is for range calibration, and a pair of ultrasonic transmission/reception sensor is for detection of testee; Described ultrasonic sensor, connecting by a stationary shaft with sensor on one side, is on identical position it;
The ultrasonic transmit circuit that described signal processing chip is adjustable by frequency power, but the receiving circuit of noise reduction, amplification, over-sampling and filtering, high precision sigma-delta AD modulator, high precision adjustable digital filtering circuit, high-speed memory and memory access interface thereof, wireless sending module, microprocessor and crystal oscillator form.
2. identifier as claimed in claim 1, it is characterized in that: described ultrasonic transmit circuit is comprised of frequency dividing circuit, power adjusting circuit and on-off circuit, and its transponder pulse frequency and power can be arranged by microprocessor; Ultrasonic energy is weak ultrasonic wave range, testee is not caused to damage.
3. identifier as claimed in claim 1, it is characterized in that: described ultrasound wave receiving circuit comprises the bandpass filter for noise reduction process, signal amplification module, over-sampling and filtering processing module.
4. identifier as claimed in claim 1, it is characterized in that: described high precision adjustable digital filtering circuit receives from carrying out from the signal of sigma-delta AD modulator filtering and signal reduction processing, and the filter parameter of this wave filter can be arranged by microprocessor.
5. identifier as claimed in claim 1 is characterized in that: described memory access interface and wireless sending module, local data can be delivered to other terminal or more new data to local.
6. identifier as claimed in claim 1, it is characterized in that: described microprocessor is mainly used in system and controls and signal analysis, system control comprises according to the user to be inputted modules is arranged, pulsed frequency and power as ultrasonic transmit circuit, digital filter parameter, environment temperature etc.Control data simultaneously and carry out data interaction by memory access interface or wireless sending module and other terminal, start and measure and signal analysis, control and show output etc.; Signal analysis is mainly calculated velocity of propagation, decay and the impedance of ultrasonic signal in testee according to detection signal, and the row distance of going forward side by side is proofreaied and correct, and then these values and corresponding standard value is compared, and draws the true and false, the quality of object being measured, and shows.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884820A (en) * | 2014-04-09 | 2014-06-25 | 杜晨林 | Portable comprehensive quick detection device |
| CN106525964A (en) * | 2016-12-05 | 2017-03-22 | 无锡艾科瑞思产品设计与研究有限公司 | Portable household food safety detection system |
| CN107037125A (en) * | 2017-01-13 | 2017-08-11 | 深圳市好克医疗仪器股份有限公司 | A kind of bubble detection system of adjustable spacing |
| CN112305067A (en) * | 2020-11-25 | 2021-02-02 | 明一国际营养品集团有限公司 | Method and detection instrument for improving milk quality ultrasonic detection precision |
| CN112400062A (en) * | 2019-06-12 | 2021-02-23 | Gea机械设备意大利股份公司 | Double diaphragm pump for use in a device for homogenizing a fluid product and method for detecting a leak in said pump |
| CN112710707A (en) * | 2020-12-16 | 2021-04-27 | 北京航星机器制造有限公司 | Liquid identification device and method based on dielectric constant and ultrasonic detection |
| WO2021142805A1 (en) * | 2020-01-17 | 2021-07-22 | 上海联芊电子科技有限公司 | Liquid detection method and apparatus, device, and storage medium |
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2012
- 2012-06-12 CN CN201210192871.9A patent/CN103487508A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884820A (en) * | 2014-04-09 | 2014-06-25 | 杜晨林 | Portable comprehensive quick detection device |
| CN106525964A (en) * | 2016-12-05 | 2017-03-22 | 无锡艾科瑞思产品设计与研究有限公司 | Portable household food safety detection system |
| CN107037125A (en) * | 2017-01-13 | 2017-08-11 | 深圳市好克医疗仪器股份有限公司 | A kind of bubble detection system of adjustable spacing |
| CN112400062A (en) * | 2019-06-12 | 2021-02-23 | Gea机械设备意大利股份公司 | Double diaphragm pump for use in a device for homogenizing a fluid product and method for detecting a leak in said pump |
| WO2021142805A1 (en) * | 2020-01-17 | 2021-07-22 | 上海联芊电子科技有限公司 | Liquid detection method and apparatus, device, and storage medium |
| CN112305067A (en) * | 2020-11-25 | 2021-02-02 | 明一国际营养品集团有限公司 | Method and detection instrument for improving milk quality ultrasonic detection precision |
| CN112710707A (en) * | 2020-12-16 | 2021-04-27 | 北京航星机器制造有限公司 | Liquid identification device and method based on dielectric constant and ultrasonic detection |
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Application publication date: 20140101 |