CN1595108A - Multiple channel hand-held food safety detecting instrument - Google Patents
Multiple channel hand-held food safety detecting instrument Download PDFInfo
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- CN1595108A CN1595108A CN 200410013417 CN200410013417A CN1595108A CN 1595108 A CN1595108 A CN 1595108A CN 200410013417 CN200410013417 CN 200410013417 CN 200410013417 A CN200410013417 A CN 200410013417A CN 1595108 A CN1595108 A CN 1595108A
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Abstract
This invention discloses a multiple-path hand detection device for food safety, which comprises light path, single machine and assistant circuit and IO parts. The single machine and the assistant circuit are used in computer and control and the IO part are used in information input and output and the said light path comprises light source constant-pressure control circuit, monochromatic light source set, multiple-path color matching pool, photoelectric detector set and signal adjusting circuit. The device is characterized by double current and convenience and it can at same time detects out organ ophosphorus, carbamate chemicals, aqua fortis, nitrite, lead cyanide, cyanide, formaldehyde and sodium sulfoxylate formaldehyde, etc. This device is capable of on-spot detection and data storage and acquirement and result copy.
Description
Technical field
The present invention relates to a kind of food Fast Detection Technique, be specifically related to a kind of hyperchannel hand-held food safety detection instrument.
Technical background
In recent years, because agricultural chemicals abuse, food and feed additive abuse, plant and animal growth hormone abuse and environmental pollution cause the problem that stains of food very outstanding.External fryer dioxin is stained the economic loss that incident has caused multi-million dollar; The domestic acute poisoning accident that causes owing to the agricultural chemicals abuse happens occasionally; A pickled and cured meat nitrite and a bubble food formaldehyde exceed standard seriously on the country fair; Excessive aquatic products such as hormone nursing soft-shelled turtle all can not relievedly eat people; Pollutant exceeds standard and makes a large amount of exporting of China cause enormous economic loss.Agricultural chemicals, pesticide, food additives and hormone abuse not only cause acute toxicity, and have carcinogenic, teratogenesis, mutagenicity and genetoxic.Therefore food-safety problem has been subjected to showing great attention to of governments at all levels and broad masses of the people.The Ministry of Science and Technology has set up expensive 1.5 hundred million the great special project of food security, the various places government quantity research exploitation funds that aspect food safety detection, also have high input, fruit and vegetable wholesale market, country fair, supermarket, hotel, school lunch service and personal user etc. have very big demand to the field quick detection of food security.
With respect to developed country in the world, there is very large gap in China at aspects such as food safety management, detection method and instruments.Aspect the food safety detection instrument, general at present stratographic analysis or the Optical Analysis Method of adopting used laboratory analytical instrument, relies on the professional and technical personnel to finish analytical work, analyzes a few hours consuming time even a couple of days from sampling.Compared with developed countries, the food production characteristics of China are that agricultural byproducts production has the dispersed i.e. characteristics of pin of greatly, promptly producing, traditional Laboratory Instruments analytical approach be difficult to realize effectively monitoring, and this just presses for a kind of hand-held in-situs tester that can satisfy on-the-spot test fast and administrative authority to food supervision and control requirement.
Domestic aspect the exploitation of food safety detection instrument research work less, mainly concentrate on the exploitation of this series products of instrument for detecting pesticide residue through.At present, the home market has had many enterprises to release the instrumentation of measuring residues of pesticides, can measure one or several sample., as the residual detector of CL-1 farming of Shanghai Tian Jing company, the RAT-201 hand-held remains of pesticide detector of Hunan Leadd B.V etc.Use 220V power supply, volume that these instruments have are big, need with the supporting use of water bath with thermostatic control, what have once can only measure a sample or a component, not too is fit to the express-analysis of on-the-spot various product polycomponent.In addition, also have minority producer to release one-parameter detectors such as formaldehyde, nitrite, can not measure a plurality of compositions simultaneously, and great majority are desktop computers that use in the laboratory.Jinlin University cygnet company has released recently aly can detect nitrite and nitrate in the food, sulphuric dioxide, formaldehyde, farming is residual and the five in one Food Safety Analysis instrument of five kinds of objectionable impuritiess of sodium formaldehyde sulfoxylate, but once can only measure a sample, and employing is desktop designs, be suitable in the laboratory, using, can't realize on-the-spot hand-held analysis.
At present, domestic also do not have to find that the hyperchannel hand-held food safety detection instrument that can carry out multiple poisonous and harmful substance fast detecting simultaneously to a plurality of samples is simultaneously arranged, and do not see the report that the similar clause instrument is arranged abroad yet.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of hyperchannel hand-held food safety detection instrument is provided, this detector can be measured simultaneously to various product, many compositions, and have simple in structure, volume is small and exquisite, easy to use, analyze fast, can directly show characteristics such as testing concentration.
A kind of hyperchannel hand-held food safety detection instrument provided by the invention, comprise light path part, single-chip microcomputer and auxiliary circuit part and input, single-chip microcomputer and auxiliary circuit partly are used for calculating and control, input is used for the input and output of information, it is characterized in that: described light path part comprises light source constant-pressure control, sets of monochromatic light sources, hyperchannel colorimetric pool, photoelectric detector group and signal conditioning circuit; Sets of monochromatic light sources, hyperchannel colorimetric pool and photoelectric detector group are positioned on the same light path, and light source constant-pressure control provides operating voltage according to the signal that single-chip microcomputer and auxiliary circuit partly provide for monochromatic source, and the switch of control light source; Sets of monochromatic light sources produces the testing sample in the monochromatic light irradiation hyperchannel colorimetric pool; The photoelectric detector group is used to detect the monochromatic light light intensity value through sample, and convert light signal to electric signal and send into signal conditioning circuit, signal conditioning circuit amplifies electric signal exports to single-chip microcomputer after the shaping and auxiliary circuit partly carries out computing and the result is exported to input.
The present invention is directed to the present situation of food safety detection technology, invented a kind of hand-held hyperchannel food safety detection instrument based on the optical analysis principle.It adopts the photoelectron element and the computer technology of state-of-the-art high integration in the world, realizes digitizing, intellectuality, the hand-held of instrument and the fast-field evaluation that is suitable for the layman.That this instrument has is simple in structure, concentration readout, man-machine interface close friend, volume are little, AC/DC and convenience operation, it can carry out the fast-field evaluation of multiple detection indexs such as organophosphorus and carbamate chemicals for agriculture, nitrate, nitrite, lead, cadmium, sexivalent chromium, fluoride, prussiate, formaldehyde and sodium formaldehyde sulfoxylate, a plurality of samples simultaneously, and has functions such as data storage, inquiry, printing as a result.This instrument is applicable to that fruits and vegetables wholesale market, country fair, hotel, school lunch service etc. need carry out the occasion of fast detecting to poisonous and harmful substance in the food.The analytical approach of instrument adopts the national standard analytical approach mostly, and testing result and national proposed standard method have comparability.
Description of drawings
Fig. 1 is the theory diagram of instrument hardware;
Fig. 2 is the software flow block diagram of apparatus measures part.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing and example.
This handheld instrument mainly comprises three parts: light path part 1, single-chip microcomputer and auxiliary circuit part 2 and input 3.Light path part 1 mainly is made of light source constant-pressure control 4, sets of monochromatic light sources 5, hyperchannel colorimetric pool 6, photoelectric detector group 7 and signal conditioning circuit 8.Single-chip microcomputer and auxiliary circuit part 2 comprise single-chip microcomputer 9, power control circuit 10, real time clock circuit 11, data-storing circuit 12, system monitoring circuit 13, temperature measuring circuit 14 and multidiameter option switch 15 etc.Input 3 comprises display device 16, input media 17 and serial communication circuit 18.
Light source constant-pressure control 4 provides constant operating voltage for monochromatic source, controls the switch of light source simultaneously; Sets of monochromatic light sources 5 is used to produce monochromatic light; Testing sample can be placed in the hyperchannel colorimetric pool 6; Photoelectric detector group 7 is used for converting detected light intensity signal to electric signal; Signal conditioning circuit 8 can amplify shaping to the electric signal of output; Single-chip microcomputer 9 is computings and control core of whole instrument; Power control circuit 10 provides reliable and stable working power for whole instrument; Real time clock circuit 11 is used for system timing; Data-storing circuit 12 is used for data-storing at nonvolatile memory EEPROM; System monitoring circuit 13 is the running status of supervisory system at any time, prevents program fleet; Temperature measuring circuit 14 can measures ambient temperature; 15 of multidiameter option switchs can be selected suitable measurement passage according to the instruction of single-chip microcomputer 9; Display device 16 and input media 17 provide good man computer interface; Serial communication circuit 18 is used for carrying out exchanges data with PC or serial printer.
According to selected test index, single-chip microcomputer 9 can be selected current measurement passage automatically, and lights light source corresponding in the sets of monochromatic light sources 5 by multidiameter option switch 15 and light source constant-pressure control 4, produces monochromatic light.After homogeneous beam passes the hyperchannel colorimetric pool 6 that solution to be measured is housed, shine on the detecting device corresponding in the photoelectric detector group 7.Detecting device is directly changed into frequency signal with detected light intensity value, again by signal conditioning circuit 8 shaping amplifications after multidiameter option switch 15 input single-chip microcomputers.Simultaneously, time that real time clock circuit 11 and temperature measuring circuit 14 also can be when measuring and temperature value convert to send into after the digital signal and carry out further data processing in the single-chip microcomputer.All measurement data are kept in the Nonvolatile data memory by data-storing circuit 12, can gather for user inquiring and data.Display device 16 and input media 17 are main input-output device.By serial communication circuit 18, can also realize and the data exchanging function of PC, also can directly print measurement result by external serial printer.
Above-mentioned each parts all can adopt prior art to be realized.Can adopt the power supply of common No. 5 batteries as above-mentioned detector.
The program of hyperchannel hand-held food safety detection instrument can adopt higher level lanquage C to write.Whole software can be divided into four module: passage setting, sample measurement, data processing, system's setting.Passage is provided with module and mainly finishes the setting of respectively measuring passage, and the user can be provided with the measurement index and the measurement parameter of each passage as required; The sample measurement module is the core of whole software.According to passage value of setting of user, corresponding passage is measured, finish functions such as the calculating of channel selecting, sample measurement control, data acquisition and final measurement and demonstration; Data processing module be responsible for finishing measurement result preservation, inquiry, printing and with the tasks such as exchanges data of PC; System is provided with module and comprises complementary functions such as system time setting, display screen contrast design, touch-screen correction.
Matching used pack improves in order to adapt to the on-the-spot specific (special) requirements of test fast with reference to the national standard analytical approach, and the microdisplay package that adopts similar Medicines to adopt is easy to use, is easy to preserve.Because adopt the national standard analytical approach mostly, testing result and national proposed standard method have comparability.
Be that the present invention is further described with an example below.
We have made one eight passage hand-held food safety detection instrument model machine, as sets of monochromatic light sources, replace existing spectrophotometric thermal light source in laboratory and monochromator system with the arrowband light emitting diode (LED) of a plurality of specific wavelengths; As the photoelectric detector group, replace the spectrophotometric photoelectric cell in existing laboratory, photomultiplier with the semi-conductor photodetector (as TSL235) of high integration; With battery pas power source, replace the spectrophotometric 220V AC power in existing laboratory, and the utilization of Low-power Technology, thereby microminiaturization, the hand-held of realization instrument; Select eight passage multi-way switchs (as CD4051) for use, measure when having realized hyperchannel, various product; (as AT89C55) is core with single-chip microcomputer, is equipped with the improvement on algorithm and the metering system, realized the on-site rapid measurement ability of instrument.
In addition, real-time timepiece chip (as DS1302), nonvolatile memory (as 24LC64), 1-wire temperature sensor (as DS1820) and RS-232 serial interface chip (as MAX3233) also have been equipped with on the instrument, thereby realized functions such as data-storing, temperature survey, PC communication and serial print, convenient for users to use.System monitoring circuit electronic circuits such as (comprise house dog, automatically reset) voltage monitorings has guaranteed the reliable and stable of instrument.
The program of hyperchannel hand-held food safety detection instrument can adopt external popular Keil C single-chip microcomputer language compilation, comprises that passage setting, sample measurement, data processing, system are provided with four module.The existing general C language characteristic of this modularized program design language, the ability that has direct control single-chip microcomputer hardware again, its basic characteristics comprise: travelling speed is fast, compile efficiency is high, have the built-in function and the floating-point operation ability of good transplantability and abundant multiple complex calculation.The software flow synoptic diagram of sample measurement module is seen Fig. 2.
With reference to existing national standard and national recommended hour analysis method, we have developed a series of chemical reagent bags that are suitable for on-the site analysis.Cooperate these pack, we can measure multiple poisonous and harmful substance content such as organophosphorus and carbamate chemicals for agriculture, nitrate, nitrite, lead, cadmium, sexivalent chromium, fluoride, prussiate, formaldehyde and sodium formaldehyde sulfoxylate by eight passage hand-held food safety detection instrument of trial-production at present.Table 1 has been listed corresponding analytical approach and method source.
Table 1 measurement index and analytical approach
Measurement index analytical approach method source
Organophosphorus and carbamate acetylcholinesterase photometry GB/T 5009.199-2003
The class agricultural chemicals
Nitrate N-1-naphthyl ethylenediamine photometry GB/T 5009.33-1996
Nitrite N-1-naphthyl ethylenediamine photometry GB/T 5009.33-1996
Plumbous phenylfluorone photometry GB/T 5009.12-1996
Cadmium phenylfluorone photometry GB/T 5009.15-1996
Sexavalent chrome diphenylcarbazide photometry GB 7467-1987
Fluoride lanthanum fluorine reagent photometry GB 7483-1987
Prussiate pyridine-barbiturates photometry GB 7487-1987
Formaldehyde diacetone photometry GB/T 15516-1995
Sodium formaldehyde sulfoxylate diacetone photometry GB/T 15516-1995
Below simply introduce the analytical procedure of hyperchannel hand-held food safety detection instrument:
(1) start.
(2) if needed, be introduced into " passage setting " menu, specify the index of current measurement for each channel measurement.The index of each channel measurement can be identical, also can have nothing in common with each other.Different and the difference to some extent of the several passage in view of the above of the alternative measurement index of each passage institute mounted LEDs optical source wavelength.The value that sets can be kept in the instrument automatically, needn't start shooting all to be provided with at every turn.
(3) enter " sample measurement " menu,, each blank sample (generally being distilled water) is put into the passage of appointment, measure blank value according to screen prompt.
(4) in each testing sample, add supporting pack.According to screen prompt, each testing sample is put into the passage of appointment, measure.
(5) instrument can calculate every desired value to be measured according to the light intensity value that records, and shows on screen.The user can preserve or print measurement result according to own needs.
(6) continue if desired to measure repeating step (3)-(4).
(7) finish measurement.The user can enter " data processing " and " system's setting " menu and carry out measurement result inquiry, data and print, carry out work such as exchanges data and related system are provided with PC.
(8) shutdown.
What hyperchannel hand-held food safety detection instrument model machine adopted at present is eight channels designs.According to the difference of market orientation, select different multi-way switchs for use, can easily instrument be extended to 16 passages, 32 passages even more.
Table 2 has been listed the major function contrast of using traditional spectrophotometer (counting example with 722 type luminosity), existing commercialization analyser (being example with the residual detector of CL-1 farming) and this instrument.(referring to State Bureau of Environmental Protection, water and effluent monitoring analytical approach (third edition), Beijing, China Environmental Science Press)
Several analytical instrument contrasts of table 2
| Residual this project of the detector instrument of 722 photometer CL-1 farming | |
| The man-machine interface level measurement channel measurement of weight power supply real-time clock data-storing printing function PC interface index | ＞15kg＞5kg 500g left and right sides AC 220V AC 220V dry cell/AC 220V does not have to have or not have to have or not have and statistics have shown that digital Chinese display interface single channel single channel hyperchannel measures residues of pesticides simultaneously, nitrate, nitrite,-residues of pesticides lead, cadmium, sexavalent chrome, fluoride, prussiate, formaldehyde, ten remainders such as sodium formaldehyde sulfoxylate |
Claims (1)
1, a kind of hyperchannel hand-held food safety detection instrument, comprise light path part, single-chip microcomputer and auxiliary circuit part and input, single-chip microcomputer and auxiliary circuit partly are used for calculating and control, input is used for the input and output of information, it is characterized in that: described light path part (1) comprises light source constant-pressure control (4), sets of monochromatic light sources (5), hyperchannel colorimetric pool (6), photoelectric detector group (7) and signal conditioning circuit (8); Sets of monochromatic light sources (5), hyperchannel colorimetric pool (6) and photoelectric detector group (7) are positioned on the same light path, light source constant-pressure control (4) provides operating voltage according to the signal that single-chip microcomputer and auxiliary circuit partly provide for monochromatic source, and the switch of control light source; Sets of monochromatic light sources (5) produces the testing sample in the monochromatic light irradiation hyperchannel colorimetric pool (6); Photoelectric detector group (7) is used to detect the monochromatic light light intensity value through sample, and convert light signal to electric signal and send into signal conditioning circuit (8), signal conditioning circuit (8) amplifies electric signal exports to single-chip microcomputer after the shaping and auxiliary circuit partly carries out computing and the result is exported to input.
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| CN 200410013417 CN1595108A (en) | 2004-07-04 | 2004-07-04 | Multiple channel hand-held food safety detecting instrument |
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| CN 200410013417 CN1595108A (en) | 2004-07-04 | 2004-07-04 | Multiple channel hand-held food safety detecting instrument |
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| CN1595108A true CN1595108A (en) | 2005-03-16 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456023C (en) * | 2005-09-09 | 2009-01-28 | 重庆工学院 | Method for rapid detecting sodium sulfoxylate formaldehyde in foodstuff |
| CN101806715A (en) * | 2010-04-28 | 2010-08-18 | 复旦大学 | Variable-volume microfluidic chip for colorimetric assay |
| CN103196842A (en) * | 2012-12-04 | 2013-07-10 | 西北农林科技大学 | Device for detecting organophosphorus pesticide residues |
| CN104034665A (en) * | 2014-06-06 | 2014-09-10 | 江西科技师范大学 | Handheld food safety detection device and method |
| CN104807959A (en) * | 2015-04-15 | 2015-07-29 | 中山市鸿程科研技术服务有限公司 | Heavy metal lead concentration detection device |
| CN112345468A (en) * | 2020-09-24 | 2021-02-09 | 九天起宏(江苏)检测有限公司 | Food detection instrument of many cuvettes of hand-held type contrast |
-
2004
- 2004-07-04 CN CN 200410013417 patent/CN1595108A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456023C (en) * | 2005-09-09 | 2009-01-28 | 重庆工学院 | Method for rapid detecting sodium sulfoxylate formaldehyde in foodstuff |
| CN101806715A (en) * | 2010-04-28 | 2010-08-18 | 复旦大学 | Variable-volume microfluidic chip for colorimetric assay |
| CN101806715B (en) * | 2010-04-28 | 2011-12-07 | 复旦大学 | Variable-volume microfluidic chip for colorimetric assay |
| CN103196842A (en) * | 2012-12-04 | 2013-07-10 | 西北农林科技大学 | Device for detecting organophosphorus pesticide residues |
| CN104034665A (en) * | 2014-06-06 | 2014-09-10 | 江西科技师范大学 | Handheld food safety detection device and method |
| CN104807959A (en) * | 2015-04-15 | 2015-07-29 | 中山市鸿程科研技术服务有限公司 | Heavy metal lead concentration detection device |
| CN112345468A (en) * | 2020-09-24 | 2021-02-09 | 九天起宏(江苏)检测有限公司 | Food detection instrument of many cuvettes of hand-held type contrast |
| CN112345468B (en) * | 2020-09-24 | 2022-08-23 | 河北奇诺检测技术服务有限公司 | Food detection instrument of many cuvettes of hand-held type contrast |
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