CN102809587A - Gas sensitive signal acquisition device and testing system for directly feeding and discharging liquid sample - Google Patents
Gas sensitive signal acquisition device and testing system for directly feeding and discharging liquid sample Download PDFInfo
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- CN102809587A CN102809587A CN2012102508758A CN201210250875A CN102809587A CN 102809587 A CN102809587 A CN 102809587A CN 2012102508758 A CN2012102508758 A CN 2012102508758A CN 201210250875 A CN201210250875 A CN 201210250875A CN 102809587 A CN102809587 A CN 102809587A
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Abstract
The invention relates to a gas sensitive signal acquisition device and a testing system for directly feeding and discharging a liquid sample. The acquisition device comprises a testing container and a sealing cover, wherein the testing container is provided with an axial vertical columnar testing space; the top of the testing container is provided with a sample feeding and discharging port for getting the liquid sample in and out; the sample feeding and discharging port is communicated with the testing space; an annular supporting plate which is parallel to the cross section of the testing space is arranged in the testing space; an inner hole corresponding to the sample feeding and discharging port is formed in the annular supporting plate; at least three sensor seats are uniformly distributed on the annular supporting plate; and the sealing cover is used for closing the sample feeding and discharging port to seal the testing space. The acquisition device is used for identifying the type and the quality of the liquid sample, is also suitable for investigation and research of excitation characteristics of the sensor and purposeful research in the aspects such as sensor array structure and environmental temperature and humidity influence compensation, and is extremely suitable for scientific research and teaching.
Description
Technical field
The invention belongs to gas sensor detection technique field, particularly a kind ofly be suitable for that fluid sample directly advances, the air-sensitive signal pickup assembly of stock layout.
Background technology
In in the detection application of product qualities such as food, agricultural product, heavy chemicals (like essence and flavoring agent etc.), utilize the air-sensitive signal to analyze usually, the various detecting instruments (like Electronic Nose) that promoted difference in functionality constantly occur and update.But existing business-like detecting instrument mainly adopts the work of head space sampling mode, and detection arrays immobilizes, and causes to produce following subject matter.
(1) sampling operation is loaded down with trivial details, and device structure is complicated
The head space sampling needs samplers such as subsidiary gas micro pump or solid phase micro collection, and this just need set up gaseous sample in the apparatus structure design the parts of accepting cause complex structural designsization.In addition, head space process need regular hour, and the often strict control of need of head space condition, make sampling operation loaded down with trivial details.
(2) the sampling amount accuracy can not guarantee
Head space gas has compressibility, and ambient temperature and humidity, head space container capacity, sample time and concrete sampling equipment all can have influence on the difference on sampling amount or the concentration, and its accuracy is difficult to guarantee.
(3) the detected object scope is restricted
In fact, different detected objects all have its corresponding optimum array, and this best or inferior good array are subject to the scale of original array and the sensor type of its composition.Therefore, fixedly the range of application of original array must be restricted.
In sum, existing detecting instrument not only take a sample complicacy, operation inconvenience, and do not have versatility and dirigibility, so be unfavorable for research exploration and demonstration lesson.
Summary of the invention
The purpose of this invention is to provide a kind of fluid sample air-sensitive detection signal harvester and test macro, be used to solve complicated, the unhandy problem of existing detecting instrument sampling.
Scheme of the present invention is: a kind of fluid sample air-sensitive signal pickup assembly; Comprise a test container; Test container has the test space of axially vertical cylindricality, and the top of test container is provided with the nesting port that advances that is used for the fluid sample turnover, advances nesting port and is communicated with the said test space; Be provided with the annular support plate with said test space transverse cross-section parallel in the test space, offer in the annular support plate with said and advance the corresponding endoporus of nesting port, evenly be laid with at least three sensor holders on the annular support plate; Said harvester also comprise sealing saidly advance nesting port, to seal the capping of the said test space.
Said annular support plate is set up on the ring-shaped step of said test container inwall.Said capping and said test container internal face cone match.Said annular support plate upper press cover is useful on and ensures that the sample volatile matter gathers the support plate lid that stays in the space of annular support plate to test space bottom.
The present invention also provides a kind of fluid sample air-sensitive signal test system, is made up of harvester, gas sensor and experimental analysis device; Comprise a test container, test container has the test space of axially vertical cylindricality, and the top of test container is provided with the nesting port that advances that is used for the fluid sample turnover, advances nesting port and is communicated with the said test space; Be provided with the annular support plate with said test space transverse cross-section parallel in the test space, offer in the annular support plate with said and advance the corresponding endoporus of nesting port, evenly be laid with at least three sensor holders on the annular support plate; Said harvester also comprise sealing saidly advance nesting port, to seal the capping of the said test space; Said gas sensor correspondence is installed on the said sensor holder; Said experimental analysis device comprises data acquisition test circuit and the computing machine that is connected with the communication of data acquisition test circuit, and the signal output part of gas sensor is connected to said data acquisition test circuit.
Said annular support plate is set up on the ring-shaped step of said test container inwall.Said capping and said test container internal face cone match.Said annular support plate upper press cover is useful on and ensures that the sample volatile matter gathers the support plate lid that stays in the space of annular support plate to test space bottom.
Of the present invention to advance nesting port be same opening, so realize that sample directly advances, stock layout, method of operating is very simple, and the ordinary test personnel can operate.
Quantity, type that sensor on the annular support plate is installed can be arranged arbitrarily; If layout Temperature Humidity Sensor; Not only can be used for investigating the excitation behavior of gas sensor to sample; Obtaining comparatively suitable original array, but research environment temperature, humidity are tester for testing that applicability is wide, function is many to aspect contents such as the influence of testing result and compensation again.
This harvester is used to differentiate the kind and the quality of fluid sample, also is suitable for investigation and the research of sensor excitation characteristic, the research of aspect such as sensor array structure and ambient temperature and humidity influence compensation targetedly, very suitable scientific research and teaching.
Description of drawings
Fig. 1 is the structural drawing of harvester;
Fig. 2 is the annular support plate structural drawing;
Fig. 3 is test system structure figure;
Fig. 4 is that a sample is judged example.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Harvester embodiment
Like Fig. 1, Fig. 2; A kind of fluid sample that is applicable to directly advances the air-sensitive signal pickup assembly of stock layout; Comprise a test container 3 with the test space of cylindrical (also can be other cylindricalitys); The top of test container 3 is provided with and is used for the opening that fluid sample advances stock layout, and opening direction is coaxial with the columniform test space; Be provided with annular support plate 6 in the test space with test space transverse cross-section parallel; Even a plurality of mounting holes respectively on the annular support plate 6; Each mounting hole can be arranged a sensor holder 7, and each sensor holder 7 is installed a sensor 8, and the type of sensor 8 and quantity can according to circumstances freely be selected.Annular support plate 6 is set up on the ring-shaped step of test container 5 inwalls, and test container 3 opening parts are provided with the capping 4 of sealing opening, capping 4 and test container internal face cone match.Annular support plate 3 upper press covers are useful on and ensure that the sample volatile matter gathers the support plate lid 5 that stays in the space of annular support plate to test space bottom.The conduct of annular support plate 6 endoporus is directly advanced, the stock layout passage uses.In order to make sample be positioned over test space bottom through support plate easily, the diameter of support plate annular endoporus is designed to 130mm.Measuring vessel adopts the cylinder design (like the stainless steel right cylinder) of no volatile materials, and the test space is 1L.
Test macro embodiment
Like Fig. 3, test macro comprises harvester (harvester repeats no more), sensor array and experimental analysis device, and sensor array is to be combined by different gas sensors.In order to make harvester have bigger range of application, the gas sensor of the metal oxide type TGS8 series of selecting for use is discrete.On support plate 6, temperature, humidity sensor can also be installed, with the situation of change of test space temperature, humidity in the record testing process.
The experimental analysis device comprises: data acquisition test circuit 2 and the computing machine 1 that is connected with the communication of data acquisition test circuit, the signal output part of sensor 8 is connected to data acquisition test circuit 2.
Signals collecting can be adopted as dynamic signal acquisition, is high-speed, multi-path circle collection data pattern.Acquisition software comprises first channel selecting, last channel selecting, the setting of image data number, sampling time interval setting, data file name, gathers functions such as execution, data preservation.
Owing to select the most frequently used TGS8 series metal oxide gas sensor for use; Therefore test circuit has carried out unified design: the WV of measuring the loop is 10V; The heating voltage of working sensor is 5V; The pull-up resistor of each sensor is 4K Ω, and the test job voltage of temperature, humidity sensor is all 10V mutually with gas sensor, and the voltage signal of all the sensors carries out data acquisition by high speed, the high-precision AD device of 16 passages.
As differentiate fake wine; Gas sensor through to a little row of some TGS8 is investigated the excitation situation of this wine article sample; Confirmed that initial gas sensor array has 14 sensors to constitute; Be TGS800, TGS812, TGS813, TGS816, TGS821, TGS822, TGS824, TGS825, TGS826, TGS830, TGS831, TGS832, TGS842, TGS880, add two temperature, humidity sensor.The concrete measuring process of this instance is, sensor array is behind over recovery, and it is 0 that first passage at first is set on the working interface of acquisition software; The end passage is 15, and promptly 16 sensor signals are all measured, and the acquisition interval time is that 1s, image data number are 900; Promptly being equivalent to total acquisition time is 900s, and after the filename input that data will be preserved, the sample of getting 5ml is to surface plate; With surface plate through the top mouthful, the support plate endoporus directly puts into measuring chamber; And then cover support plate lid and conical surface capping, click " beginning to gather " button on the working interface, carry out data acquisition.When the image data number equals 900, gather and accomplish, click " data preservation " button to preserve the data of being gathered, so that subsequent analysis.At last, open conical surface capping and support plate lid, take out sample, sensor array carries out restoring naturally of 15min, just can carry out the test of next sample after the recovery.True wine has been cooked 20 samples (circle is represented) in this instance; Fake wine has been cooked 50 samples (square is represented); It is eigenwert that each gas sensor measurement data of each sample is extracted wavelet energy; And carry out thinking that true and false wine article can be come by discriminating well, are illustrated in figure 4 as the true and false identification result of certain wine article after the principal component analysis (PCA).
Claims (8)
1. fluid sample air-sensitive signal pickup assembly; It is characterized in that, comprise a test container, test container has the test space of axially vertical cylindricality; The top of test container is provided with the nesting port that advances that is used for the fluid sample turnover, advances nesting port and is communicated with the said test space; Be provided with the annular support plate with said test space transverse cross-section parallel in the test space, offer in the annular support plate with said and advance the corresponding endoporus of nesting port, evenly be laid with at least three sensor holders on the annular support plate; Said harvester also comprise sealing saidly advance nesting port, to seal the capping of the said test space.
2. a kind of fluid sample air-sensitive signal pickup assembly according to claim 1 is characterized in that said annular support plate is set up on the ring-shaped step of said test container inwall.
3. a kind of fluid sample air-sensitive signal pickup assembly according to claim 1 is characterized in that, said capping and said test container internal face cone match.
4. a kind of fluid sample air-sensitive signal pickup assembly according to claim 2 is characterized in that, said annular support plate upper press cover is useful on and ensures that the sample volatile matter gathers the support plate lid that stays in the space of annular support plate to test space bottom.
5. a fluid sample air-sensitive signal test system is characterized in that, is made up of harvester, gas sensor and experimental analysis device; Comprise a test container, test container has the test space of axially vertical cylindricality, and the top of test container is provided with the nesting port that advances that is used for the fluid sample turnover, advances nesting port and is communicated with the said test space; Be provided with the annular support plate with said test space transverse cross-section parallel in the test space, offer in the annular support plate with said and advance the corresponding endoporus of nesting port, evenly be laid with at least three sensor holders on the annular support plate; Said harvester also comprise sealing saidly advance nesting port, to seal the capping of the said test space; Said gas sensor correspondence is installed on the said sensor holder; Said experimental analysis device comprises data acquisition test circuit and the computing machine that is connected with the communication of data acquisition test circuit, and the signal output part of gas sensor is connected to said data acquisition test circuit.
6. a kind of fluid sample air-sensitive signal test system according to claim 5 is characterized in that said annular support plate is set up on the ring-shaped step of said test container inwall.
7. a kind of fluid sample air-sensitive signal test system according to claim 5 is characterized in that, said capping and said test container internal face cone match.
8. a kind of fluid sample air-sensitive signal test system according to claim 6 is characterized in that, said annular support plate upper press cover is useful on and ensures that the sample volatile matter gathers the support plate lid that stays in the space of annular support plate to test space bottom.
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| CN2012102508758A CN102809587A (en) | 2012-07-19 | 2012-07-19 | Gas sensitive signal acquisition device and testing system for directly feeding and discharging liquid sample |
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| CN2012102508758A CN102809587A (en) | 2012-07-19 | 2012-07-19 | Gas sensitive signal acquisition device and testing system for directly feeding and discharging liquid sample |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264809A (en) * | 1998-03-17 | 1999-09-28 | Shimadzu Corp | Gas identifying device |
| CN1367381A (en) * | 2002-03-15 | 2002-09-04 | 上海慧比智能科技有限公司 | Olfactory simulator and its olfactory simulation testing method |
| CN202735292U (en) * | 2012-07-19 | 2013-02-13 | 河南科技大学 | Gas sensing signal collector and testing system suitable for liquid sample to directly enter into stock layout |
-
2012
- 2012-07-19 CN CN2012102508758A patent/CN102809587A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11264809A (en) * | 1998-03-17 | 1999-09-28 | Shimadzu Corp | Gas identifying device |
| CN1367381A (en) * | 2002-03-15 | 2002-09-04 | 上海慧比智能科技有限公司 | Olfactory simulator and its olfactory simulation testing method |
| CN202735292U (en) * | 2012-07-19 | 2013-02-13 | 河南科技大学 | Gas sensing signal collector and testing system suitable for liquid sample to directly enter into stock layout |
Non-Patent Citations (2)
| Title |
|---|
| JIAQIANG XU ET AL.: ""Grain size control and gas sensing properties of ZnO gas sensor"", 《SENSORS AND ACTUATORS B》 * |
| 田先亮: ""基于人工嗅觉酒类质量鉴别及其稳定性判别方法研究"", 《河南科技大学 硕士学位论文》 * |
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Application publication date: 20121205 |