CN201035020Y - Portable electric nose system based on USB interface - Google Patents
Portable electric nose system based on USB interface Download PDFInfo
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- CN201035020Y CN201035020Y CNU2007201079923U CN200720107992U CN201035020Y CN 201035020 Y CN201035020 Y CN 201035020Y CN U2007201079923 U CNU2007201079923 U CN U2007201079923U CN 200720107992 U CN200720107992 U CN 200720107992U CN 201035020 Y CN201035020 Y CN 201035020Y
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- 239000003990 capacitor Substances 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 235000019645 odor Nutrition 0.000 abstract 4
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 239000003205 fragrance Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 33
- 230000035943 smell Effects 0.000 description 15
- 239000012159 carrier gas Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000009418 agronomic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000008786 sensory perception of smell Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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Abstract
The utility model discloses a portable electronic nose system based on USB interface. The odor detection and data acquisition system includes a gas sensor array, the gas input end is connected with two electromagnetic valves through a three-way pipe, the signal output end is connected with the data acquisition card after signal conditioning, the output end of the data acquisition card is connected with a computer by USB interface; the gas path control system includes a data acquisition card, the output end thereof is respectively connected with the electromagnetic valve and the pump which are used for switching the gas path. When working, computer opens the pump by the data acquisition card based on programs, the gas path is firstly switched to the odor acquisition state, the odor is converted into electrical signal by the gas sensor array, the electrical signal is sent to the computer for analyzing and processing by the data acquisition card, the gas path is switched to the cleaning state after the acquisition time, the odorant molecules absorbed on the gas sensor array are removed for the next time acquisition. The utility model is convenient to acquiring and analyzing the different odors through changing the gas sensor in the gas sensor array.
Description
Technical field
The utility model relates to the detecting instrument of diseases and pests of agronomic crop and quality of agricultural product, be specifically related to a kind of USB interface-based portable electric nose system.
Background technology
The different maturity stages of crops, the different periods of expansion of crop disease and insect, the different shelf times of food etc. all have different volatile matters to produce, and these volatile matters are enough to allow gas sensor that tangible response is arranged, and make Electronic Nose can detect and distinguish identification.The aroma quality of normal food is to evaluate by people's sense of smell impression on the other hand, subjective appreciation mainly relies on what mental condition of physiology of people, the accuracy of evaluation result often is difficult to guarantee, development along with sensor technology and microcomputer, Electronic Nose is as testing tool, and prospect is very wide, but present used Electronic Nose function singleness, bulky inconvenience is carried, and especially can't take the field to and carry out the smell collection.
Summary of the invention
The purpose of this utility model provides that price is low, volume is little, portable a kind of USB interface-based portable electric nose system.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
It comprises smell acquisition control system, signal condition unit, data acquisition system (DAS), computing machine, two solenoid valves and air pump; The smell acquisition control system connects data acquisition system (DAS) through the signal condition unit, and data acquisition system (DAS) is connected with air pump with computing machine, first solenoid valve, second solenoid valve respectively.
In the described smell acquisition control system:
Gas sensor array is made up of eight different gas sensors respectively, and it is indoor to be encapsulated in sensor response, sensor reaction chamber links to each other with air pump, air pump links to each other with second solenoid valve with first solenoid valve respectively by threeway, the first solenoid valve other end feeds sampling receptacle, and the second solenoid valve other end is carried the air-capacitor device;
Gas sensor array: comprise eight different gas sensors, 1,3 pin of first gas sensor connect power supply E2 positive pole after linking to each other, 4,6 pin of first gas sensor connect power supply E2 negative pole by resistance R Q1 after linking to each other, 2 pin of first gas sensor connect power supply E1 positive pole, 5 pin of first gas sensor connect power supply E1 negative pole, capacitor C Q1 and resistance R Q1 also connect, 4 pin of first gas sensor meet corresponding signal orderliness circuit input end IN1, and the connected mode of other seven gas sensors and first gas sensor are identical.
In the described signal condition unit: first input end IN1 of the first via connects the input end in the same way of corresponding integrated operational amplifier OP1, first resistance R 1 and the 5th resistance R t also connect the back first termination power E2 positive pole, second termination, second resistance R 2, second end of second resistance R 2 connects power supply E2 negative pole by the 3rd resistance R 3, the reverse input end of integrated operational amplifier OP1 links to each other with second end of second resistance R 2 and first end of the 4th resistance R 4 respectively, second end of the 4th resistance R 4 and the output terminal of integrated operational amplifier OP1 join, the output terminal of capacitor C 1 one ends and integrated operational amplifier OP1 joins, another termination power E2 negative pole, the output terminal of integrated operational amplifier OP1 links to each other with first input end Ai1 of data acquisition system (DAS) again, and the connected mode and the first via of other seven road signal conditions unit are identical.
In the described data acquisition system (DAS): eight input end Ai1～Ai8 of data collecting card link to each other with the output terminal of eight integrated operational amplifiers in the signal condition unit respectively, the USB interface and the USB interface of computer of data collecting card are joined, the first output terminals A O1 of data collecting card connects first transistor base by the 6th resistance R T1, first transistor collector connects first relay, the first relay other end with meet power supply VCC after first solenoid valve links to each other, the first solenoid valve other end is through the normally opened contact of first relay and ground connection after first transistor emitter links to each other; The second output terminals A O2 of data collecting card connects the 7th transistor base by the second resistance R T2, second transistor collector connects second relay, the second relay other end with meet power supply VCC after second solenoid valve links to each other, the second solenoid valve other end is through the normally opened contact of second relay and ground connection after second transistor emitter links to each other; The 3rd output terminals A O3 of data collecting card connects the 3rd transistor base by the 8th resistance R T3, the 3rd transistor collector connects the 3rd relay, the 3rd relay other end with meet power supply VCC after air pump links to each other, the air pump other end is through the normally opened contact of the 3rd relay and ground connection after the 3rd transistor emitter links to each other.
The useful effect that the utlity model has is:
Whole smell collection is by computer controlled automatic, after sample placed closed container, treat that the top air reaches balance, the computer control data collecting card is opened air pump, earlier gas circuit being switched to the smell acquisition state imports the head space gas in the container in the sensor array reaction chamber into, by gas sensor array smell being converted to electric signal passes to computing machine by data collecting card and carries out analyzing and processing, acquisition time switches to gas circuit the cleaning state later again, and the scent molecule that the suction carrier gas will be adsorbed on the gas sensor array is removed so that gather next time.But the utlity model has the overlapping development ability, can form new sensor array, rebulid mathematical model, easily different odor is carried out collection analysis at new application as long as change one or several sensor.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
The schematic circuit that Fig. 2 the utility model sensor array connects;
Fig. 3 signal condition schematic circuit;
Fig. 4 data acquisition system (DAS) schematic circuit
Embodiment
As shown in Figure 1, it comprises smell acquisition control system U1, signal condition unit U2, data acquisition system (DAS) U3, computing machine U4, two solenoid valve F1, F2 and air pump B; Smell acquisition control system U1 meets data acquisition system (DAS) U3 through signal condition unit U2, and data acquisition system (DAS) U3 is connected with air pump B with computing machine U4, the first solenoid valve F1, the second solenoid valve F2 respectively.
As shown in Figure 1, among the described smell acquisition control system U1:
Gas sensor array QZ is made up of eight different gas sensors respectively, and be encapsulated in the sensor reaction chamber H, sensor reaction chamber H links to each other with air pump B, air pump B links to each other with the second solenoid valve F2 with the first solenoid valve F1 respectively by threeway T, the first solenoid valve F1 other end feeds sampling receptacle, and the second solenoid valve F2 other end is carried the air-capacitor device;
As shown in Figure 2, gas sensor array QZ: comprise eight different gas sensor Q1～Q8,1 of the first gas sensor Q1,3 pin connect power supply E2 positive pole after linking to each other, 4 of the first gas sensor Q1,6 pin connect power supply E2 negative pole by resistance R Q1 after linking to each other, 2 pin of the first gas sensor Q1 connect power supply E1 positive pole, 5 pin of first gas sensor (Q1) connect power supply E1 negative pole, capacitor C Q1 and resistance R Q1 also connect, 4 pin of the first gas sensor Q1 meet corresponding signal orderliness circuit input end IN1, and the connected mode of other seven gas sensors and the first gas sensor Q1 are identical.
As shown in Figure 3, among the described signal condition unit U2: first input end IN1 of the first via connects the input end in the same way of corresponding integrated operational amplifier OP1, first resistance R 1 and the 5th resistance R t also connect the back first termination power E2 positive pole, second termination, second resistance R 2, second end of second resistance R 2 connects power supply E2 negative pole by the 3rd resistance R 3, the reverse input end of integrated operational amplifier OP1 links to each other with second end of second resistance R 2 and first end of the 4th resistance R 4 respectively, second end of the 4th resistance R 4 and the output terminal of integrated operational amplifier OP1 join, the output terminal of capacitor C 1 one ends and integrated operational amplifier OP1 joins, another termination power E2 negative pole, the output terminal of integrated operational amplifier OP1 links to each other with first input end Ai1 of data acquisition system (DAS) U3 again, and the connected mode and the first via of other seven road signal conditions unit are identical.
As shown in Figure 4, among the described data acquisition system (DAS) U3: eight input end Ai1～Ai8 of data collecting card K1 link to each other with the output terminal of eight integrated operational amplifiers in the signal condition unit U2 respectively, the USB interface of the USB interface of data collecting card K1 and computing machine U4 is joined, the first output terminals A O1 of data collecting card K1 connects first triode T1 base stage by the 6th resistance R T1, first triode T1 collector connects first relay J 1, first relay J, 1 other end with meet power supply VCC after the first solenoid valve F1 links to each other, the first solenoid valve F1 other end is through the normally opened contact of first relay J 1 and ground connection after first triode T1 emitter links to each other; The second output terminals A O2 of data collecting card K1 connects second triode T2 base stage by the 7th resistance R T2, second triode T2 collector connects second relay J 2, second relay J, 2 other ends with meet power supply VCC after the second solenoid valve F2 links to each other, the second solenoid valve F2 other end is through the normally opened contact of second relay J 2 and ground connection after second triode T2 emitter links to each other; The 3rd output terminals A O3 of data collecting card K1 connects the 3rd triode T3 base stage by the 8th resistance R T3, the 3rd triode T3 collector connects the 3rd relay J 3, the 3rd relay J 3 other ends with meet power supply VCC after air pump B links to each other, the air pump B other end is through the normally opened contact of the 3rd relay J 3 and ground connection after the 3rd triode T3 emitter links to each other.
During system works, computing machine U4 by data collecting card K1 control air pump B and the first solenoid valve F1 with in the gas suction sensor reaction chamber H, because different gas sensors is to the susceptibility difference of different odor, make its output voltage also different, the sensor array QZ that is made up of eight gas sensors can produce eight different output voltages after signal condition unit U2 handles, these voltages are adopted by data collecting card K1 and are formed a kind of smell information fingerprint figure in the computing machine U4, the corresponding a kind of information fingerprint figure of a kind of smell, computing machine U4 forms database with the information fingerprint figure of various smells after " training ", which kind of smell judges thus in the suction sensor reaction chamber H is, last computing machine U4, removes the scent molecule that is adsorbed on the gas sensor array so that gather next time with in the carrier gas suction sensor reaction chamber H by data collecting card K1 control air pump B and the second solenoid valve F2.
The utility model comprises smell acquisition control system U1, signal condition unit U2, data acquisition system (DAS) U3, computing machine U4, wherein: the gas sensor array among the acquisition control system U1 can be selected MQ-3 for use, TGS822, MQ-7, TGS800, TGS824, TGS813, TGS880, the TGS825 sensor is formed, sensor array is evenly distributed in the sensor reaction chamber H, sensor reaction chamber H is made up of closed container, air pump adopts 5 volts of micro air pumps, solenoid valve adopts 5 incubative pathogen body solenoid valves, integrated operational amplifier among the signal condition unit U2 can be selected the high-gain low noise amplifier for use, data collecting card is selected the USB2006 of NI company type data collecting card for use among the data acquisition system (DAS) U3, and computing machine U4 can select notebook computer for use.
Claims (4)
1. USB interface-based portable electric nose system, it is characterized in that: it comprises smell acquisition control system (U1), signal condition unit (U2), data acquisition system (DAS) (U3), computing machine (U4), two solenoid valves (F1, F2) and air pump (B); Smell acquisition control system (U1) connects data acquisition system (DAS) (U3) through signal condition unit (U2), and data acquisition system (DAS) (U3) is connected with computing machine (U4), first solenoid valve (F1), second solenoid valve (F2) and air pump (B) respectively.
2. a kind of USB interface-based portable electric nose system according to claim 1 is characterized in that in the described smell acquisition control system (U1):
Gas sensor array (QZ) is made up of eight different gas sensors respectively, and be encapsulated in the sensor reaction chamber (H), sensor reaction chamber (H) links to each other with air pump (B), air pump (B) links to each other with second solenoid valve (F2) with first solenoid valve (F1) respectively by threeway (T), first solenoid valve (F1) other end feeds sampling receptacle, and second solenoid valve (F2) other end is carried the air-capacitor device;
Gas sensor array (QZ): comprise eight different gas sensors (Q1～Q8), 1 of first gas sensor (Q1), 3 pin connect power supply E2 positive pole after linking to each other, 4 of first gas sensor (Q1), 6 pin connect power supply E2 negative pole by resistance R Q1 after linking to each other, 2 pin of first gas sensor (Q1) connect power supply E1 positive pole, 5 pin of first gas sensor (Q1) connect power supply E1 negative pole, capacitor C Q1 and resistance R Q1 also connect, 4 pin of first gas sensor (Q1) meet corresponding signal orderliness circuit input end IN1, and the connected mode of other seven gas sensors and first gas sensor (Q1) are identical.
3. a kind of USB interface-based portable electric nose system according to claim 1, it is characterized in that in the described signal condition unit (U2): first input end IN1 of the first via connects the input end in the same way of corresponding integrated operational amplifier OP1, first resistance R 1 and the 5th resistance R t also connect the back first termination power E2 positive pole, second termination, second resistance R 2, second end of second resistance R 2 connects power supply E2 negative pole by the 3rd resistance R 3, the reverse input end of integrated operational amplifier OP1 links to each other with second end of second resistance R 2 and first end of the 4th resistance R 4 respectively, second end of the 4th resistance R 4 and the output terminal of integrated operational amplifier OP1 join, the output terminal of capacitor C 1 one ends and integrated operational amplifier OP1 joins, another termination power E2 negative pole, the output terminal of integrated operational amplifier OP1 links to each other with first input end Ai1 of data acquisition system (DAS) (U3) again, and the connected mode and the first via of other seven road signal conditions unit are identical.
4. a kind of USB interface-based portable electric nose system according to claim 1, it is characterized in that in the described data acquisition system (DAS) (U3): eight input end Ai1～Ai8 of data collecting card (K1) link to each other with the output terminal of eight integrated operational amplifiers in signal condition unit (U2) respectively, the USB interface of the USB interface of data collecting card (K1) and computing machine (U4) is joined, the first output terminals A O1 of data collecting card (K1) connects first triode (T1) base stage by the 6th resistance R T1, first triode (T1) collector connects first relay (J1), first relay (J1) other end with meet power supply VCC after first solenoid valve (F1) links to each other, first solenoid valve (F1) other end is through the normally opened contact of first relay (J1) and ground connection after first triode (T1) emitter links to each other; The second output terminals A O2 of data collecting card (K1) connects second triode (T2) base stage by the 7th resistance R T2, second triode (T2) collector connects second relay (J2), second relay (J2) other end with meet power supply VCC after second solenoid valve (F2) links to each other, second solenoid valve (F2) other end is through the normally opened contact of second relay (J2) and ground connection after second triode (T2) emitter links to each other; The 3rd output terminals A O3 of data collecting card (K1) connects the 3rd triode (T3) base stage by the 8th resistance R T3, the 3rd triode (T3) collector connects the 3rd relay (J3), the 3rd relay (J3) other end with meet power supply VCC after air pump (B) links to each other, air pump (B) other end is through the normally opened contact of the 3rd relay (J3) and ground connection after the 3rd triode (T3) emitter links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201079923U CN201035020Y (en) | 2007-04-10 | 2007-04-10 | Portable electric nose system based on USB interface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201079923U CN201035020Y (en) | 2007-04-10 | 2007-04-10 | Portable electric nose system based on USB interface |
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| Publication Number | Publication Date |
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| CN201035020Y true CN201035020Y (en) | 2008-03-12 |
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| CNU2007201079923U Expired - Fee Related CN201035020Y (en) | 2007-04-10 | 2007-04-10 | Portable electric nose system based on USB interface |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042408B (en) * | 2007-04-10 | 2010-08-25 | 浙江大学 | Portable electric nose system based on USB interface |
| CN101419212B (en) * | 2008-12-08 | 2012-10-17 | 浙江大学 | Bird egg freshness detection device and method by utilizing volatile matter |
| CN101419213B (en) * | 2008-12-08 | 2012-11-07 | 浙江大学 | Detection method for bird egg crack by utilizing volatile matter |
-
2007
- 2007-04-10 CN CNU2007201079923U patent/CN201035020Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042408B (en) * | 2007-04-10 | 2010-08-25 | 浙江大学 | Portable electric nose system based on USB interface |
| CN101419212B (en) * | 2008-12-08 | 2012-10-17 | 浙江大学 | Bird egg freshness detection device and method by utilizing volatile matter |
| CN101419213B (en) * | 2008-12-08 | 2012-11-07 | 浙江大学 | Detection method for bird egg crack by utilizing volatile matter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20110410 |