CN205786455U - A kind of Portable pesticide residue measurer - Google Patents
A kind of Portable pesticide residue measurer Download PDFInfo
- Publication number
- CN205786455U CN205786455U CN201620455083.8U CN201620455083U CN205786455U CN 205786455 U CN205786455 U CN 205786455U CN 201620455083 U CN201620455083 U CN 201620455083U CN 205786455 U CN205786455 U CN 205786455U
- Authority
- CN
- China
- Prior art keywords
- unit
- signal processing
- electrode sensor
- pesticide residue
- input
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
This utility model provides a kind of Portable pesticide residue measurer, including main control unit, signal processing unit, A/D collecting unit, liquid crystal display, power subsystem, input-output unit and host computer, signal processing unit connects A/D collecting unit, A/D collecting unit, liquid crystal display, power subsystem, input-output unit and host computer connect main control unit respectively, signal processing unit includes potentiostat, enzyme electrode sensor, I/V converter unit, differential amplifier circuit and low-pass filter circuit, potentiostat ligase electrode sensor, this utility model is reasonable in design, easy to use, the persticide residue of the crops such as fruit and vegerable can be measured accurately, reliable and stable, precision is high, respond well, there is good application prospect.
Description
Technical field
This utility model is specifically related to a kind of Portable pesticide residue measurer.
Background technology
Along with the development of agriculture industrialization and improving constantly of human life quality, food safety is asked
Topic has become as focus of concern.Owing to the misuse of agricultural product production link Pesticides is with indiscriminate
With, Practice for Pesticide Residue in Agricultural Products exceeds standard and has become as the problem that can not be ignored.Organophosphorus pesticide conduct
The main source that pesticide residues exceed standard, current traditional detection means use biochemistry and color mostly
Spectrum detection method carries out the analysis of qualitative, quantitative, and advantage is that detection limit is low, precision is high, sensitivity
The strongest；Shortcoming is that use occasion is limited, and when detecting on the spot, its volume is heavy, behaviour
It is required height, needs the collaborative operation of skilled addressee, it is impossible to meet wanting of field quick detection
Ask.
Utility model content
The purpose of this utility model is for solving above-mentioned deficiency, it is provided that a kind of portable pesticide residues
Detector.
The purpose of this utility model is achieved through the following technical solutions:
A kind of Portable pesticide residue measurer, including main control unit, signal processing unit,
A/D collecting unit, liquid crystal display, power subsystem, input-output unit and host computer,
Signal processing unit connects A/D collecting unit, A/D collecting unit, liquid crystal display, electricity
Source unit, input-output unit and host computer connect main control unit, signal processing unit bag respectively
Include potentiostat, enzyme electrode sensor, I/V converter unit, differential amplifier circuit and low pass filtered
Wave circuit, potentiostat ligase electrode sensor, liquid to be measured is placed on enzyme electrode sensor,
Enzyme electrode sensor connects I/V converter unit, and I/V converter unit connects differential amplifier circuit, poor
Amplifying circuit is divided to connect low-pass filter circuit.
Main control unit uses the singlechip chip of STC12C5A60S2.
Input-output unit includes keyboard and printer.
A/D collecting unit uses 16 A/D converter AD7705 chips.
This utility model has a following beneficial effect:
This utility model is reasonable in design, easy to use, it is possible to the crops such as accurate mensuration fruit and vegerable
Persticide residue, reliable and stable, precision is high, respond well, have good application prospect.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model；
Fig. 2 is potentiostat circuit figure of the present utility model；
Fig. 3 is I/V converter unit circuit diagram of the present utility model；
Fig. 4 is differential amplifier circuit of the present utility model；
Fig. 5 is low-pass filter circuit of the present utility model；
Fig. 6 is A/D collecting unit circuit diagram of the present utility model；
Fig. 7 is liquid crystal display circuit diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further described:
As it is shown in figure 1, a kind of Portable pesticide residue measurer, including main control unit 9, signal
Processing unit, A/D collecting unit 8, liquid crystal display 10, power subsystem, input and output
Unit and host computer 5, signal processing unit connection A/D collecting unit 8, A/D collecting unit 8,
Liquid crystal display 10, power subsystem, input-output unit and host computer 5 connect master control respectively
Unit 9, signal processing unit includes potentiostat 1, enzyme electrode sensor 4, I/V converter unit
3, differential amplifier circuit 6 and low-pass filter circuit 7, potentiostat 1 ligase electrode sensor 4,
Liquid 2 to be measured is placed on enzyme electrode sensor 4, and enzyme electrode sensor 4 connects I/V converter unit 3,
I/V converter unit 3 connects differential amplifier circuit 6, and differential amplifier circuit 6 connects low-pass filter circuit
7。
Main control unit uses the singlechip chip of STC12C5A60S2.
Input-output unit includes keyboard 11 and printer 12.
A/D collecting unit uses 16 A/D converter AD7705 chips.
Operation principle: use button that the time parameter needed for electrochemical reaction is set, by liquid to be measured
Join on the working electrode of enzyme electrode, and enzyme sheet is covered on liquid to be measured.By acetyl gallbladder
Alkali esterase selective catalysis, can generate glycine betaine and hydrogen peroxide in liquid to be measured, hydrogen peroxide has
There is strong oxidizing property, irreversible reproducibility electric current, the work of organophosphorus pesticide energy inhibitory enzyme can be produced
Property makes reproducibility electric current reduce, the low current signal that will detect according to this principle design circuit
After conditioning, carry out A/D sampling, send into microprocessor calculation process and by straight for the residual quantity of pesticide
Connected liquid crystal display out.
I/V translation circuit has selected input bias current to be 20～70pA, input offset voltage is
1 μ V, common mode rejection ratio are the integrated operational amplifier AD8571 of 120～140dB.
Differential amplifier circuit uses the design of high cmrr amplifier AD622, circuit amplification
A=1+50.5k Ω/RV.By changing the resistance of RV, adjust the multiple of instrument amplifier, change
Become the size of output voltage, finally obtain the voltage of 0～5V scope.
16 A/D conversion chip AD7705 of sigma-delta type are used to carry out data acquisition and conversion.This core
The gain amplifier of sheet built-in programmable, digital filter and calibration option, improve system
Accuracy of detection.
Display unit selects 240 × 128 matrix liquid-crystal display screens of T6963 kernel as display mould
Block, can clearly indicate out the systematic parameter of setting, the residual concentration of pesticide and enzyme level
Rate, and have alarm indicator function, make detector detection information more directly perceived.
Claims (4)
1. a Portable pesticide residue measurer, including main control unit, signal processing unit, A/D
Collecting unit, liquid crystal display, power subsystem, input-output unit and host computer,
It is characterized in that: signal processing unit connection A/D collecting unit, A/D collecting unit,
Liquid crystal display, power subsystem, input-output unit and host computer connect master control respectively
Unit, signal processing unit include potentiostat, enzyme electrode sensor, I/V converter unit,
Differential amplifier circuit and low-pass filter circuit, potentiostat ligase electrode sensor, treat
Surveying liquid and be placed on enzyme electrode sensor, enzyme electrode sensor connects I/V converter unit, I/V
Converter unit connects differential amplifier circuit, and differential amplifier circuit connects low-pass filter circuit.
A kind of Portable pesticide residue measurer the most according to claim 1, it is characterised in that:
Described main control unit uses the singlechip chip of STC12C5A60S2.
A kind of Portable pesticide residue measurer the most according to claim 1, it is characterised in that:
Described input-output unit includes keyboard and printer.
A kind of Portable pesticide residue measurer the most according to claim 1, it is characterised in that:
Described A/D collecting unit uses 16 A/D converter AD7705 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620455083.8U CN205786455U (en) | 2016-05-18 | 2016-05-18 | A kind of Portable pesticide residue measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620455083.8U CN205786455U (en) | 2016-05-18 | 2016-05-18 | A kind of Portable pesticide residue measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205786455U true CN205786455U (en) | 2016-12-07 |
Family
ID=58120098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620455083.8U Expired - Fee Related CN205786455U (en) | 2016-05-18 | 2016-05-18 | A kind of Portable pesticide residue measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205786455U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706731A (en) * | 2017-02-15 | 2017-05-24 | 黑龙江省农业科学院农产品质量安全研究所 | Quick household fruit and vegetable pesticide residue detector |
| TWI707630B (en) * | 2019-04-02 | 2020-10-21 | 劉茂誠 | Residue detecting device, and method thereof |
-
2016
- 2016-05-18 CN CN201620455083.8U patent/CN205786455U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706731A (en) * | 2017-02-15 | 2017-05-24 | 黑龙江省农业科学院农产品质量安全研究所 | Quick household fruit and vegetable pesticide residue detector |
| TWI707630B (en) * | 2019-04-02 | 2020-10-21 | 劉茂誠 | Residue detecting device, and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |