CN106468685A - Ion mobility spectrometry and semiconductor gas sensor integrated detection system - Google Patents
Ion mobility spectrometry and semiconductor gas sensor integrated detection system Download PDFInfo
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- CN106468685A CN106468685A CN201510517827.4A CN201510517827A CN106468685A CN 106468685 A CN106468685 A CN 106468685A CN 201510517827 A CN201510517827 A CN 201510517827A CN 106468685 A CN106468685 A CN 106468685A
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Abstract
Ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system, accurately can detect chemical warfare agent, and energy quick detection indusrial toxic harmful gas, be with a wide range of applications.The present invention includes power pack, ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit, ion migration spectrum sensor auxiliary circuit includes migrating ring bleeder circuit, ion fence gate power supply circuits, signal processing circuit includes ion mobility spectrometry sensor signal conditioning circuit, ADC store circuit and host computer telecommunication circuit, and control circuit includes ion fence gate control circuit, ADC collection sequential control circuit, semiconductor transducer control circuit；Ion fence gate control circuit is connected with ion migration spectrum sensor auxiliary circuit, and semiconductor transducer control circuit connects semiconductor transducer, and ADC collection sequential control circuit connects ADC store circuit；Ion migration spectrum sensor auxiliary circuit connects ion mobility spectrometry sensor signal conditioning circuit.
Description
Technical field
The invention belongs to integrated detection technique field, more particularly to ion mobility spectrometry and semiconductor gas sensor integrated detection system.
Background technology
Ion mobility spectrometry（Ion Mobility Spectrometry,IMS）Technology is a kind of trace chemical analysis and detection technology growing up at late 1960s, the beginning of the seventies.This technology has that analyze speed is fast, sensitivity is high and the low advantage of test limit, and the therefore context of detection in chemical warfare agent, drugs and explosive is widely used.In addition, IMS technology also all show good application prospect in terms of judicial expertise, environmental monitoring, the mensure of meat product freshness, the analysis of clinical treatment diagnosis, antibacterial and biomacromolecule.
Gas sensor is a kind of sensor of detection specific gas.It mainly includes semiconductor gas sensor, catalytic combustion type gas sensor and Electro-chemical Gas Sensor etc., and wherein applying most is semiconductor gas sensor.Traditional gas sensory sensor adopts heater-type slug type, and the type sensor bulk is big, and power consumption is high.In recent years, thick-film type and thin film type gas-sensitive semiconductor transducer are occurred in that, compared with slug type, thick-film type and thin film type gas-sensitive semiconductor transducer volume are substantially reduced, and power consumption significantly reduces.
Ion mobility spectrometry and semiconductor gas sensor are carried out integrated, both accurately can detect chemical warfare agent, and can quick detection indusrial toxic harmful gas, such as CO, gas, coal gas, freon, ethanol and toluene etc..
Content of the invention
The present invention is aiming at the problems referred to above, makes up the deficiencies in the prior art, provides ion mobility spectrometry and semiconductor gas sensor integrated detection system；The present invention accurately can detect chemical warfare agent, and energy quick detection indusrial toxic harmful gas, is with a wide range of applications.
For realizing the above-mentioned purpose of the present invention, the present invention adopts the following technical scheme that.
Ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system, including power pack, ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit；Its structural feature is：Described power pack is powered to respectively ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit, described ion migration spectrum sensor auxiliary circuit includes migrating ring bleeder circuit, ion fence gate power supply circuits, described signal processing circuit includes ion mobility spectrometry sensor signal conditioning circuit, ADC store circuit and host computer telecommunication circuit, and described control circuit includes ion fence gate control circuit, ADC collection sequential control circuit, semiconductor transducer control circuit；Described ion fence gate control circuit is connected with ion migration spectrum sensor auxiliary circuit, and described semiconductor transducer control circuit connects semiconductor transducer, and described ADC collection sequential control circuit connects ADC store circuit；Described ion migration spectrum sensor auxiliary circuit is connected with ion mobility spectrometry sensor signal conditioning circuit.
As a preferred embodiment of the present invention, described power pack includes positive or negative high voltage module and low-voltage module.
As another kind of preferred version of the present invention, described semiconductor transducer adopts gas sensory sensor MP-7 and WSP2110.
Another kind of preferred version as the present invention, described ADC store circuit includes ARM9 series S3C2440,16 ADC chip ADS8556IPM and FPGAEP2C5, described ARM9S3C2440 is connected with 16 ADC chip ADS8556IPM corresponding ports, and described FPGAEP2C5 is connected with 16 ADC chip ADS8556IPM corresponding ports.
As another kind of preferred version of the present invention, described semiconductor transducer control circuit includes semiconductor transducer and drives PWM signal to occur and driving voltage regulation power amplifier.
The invention has the beneficial effects as follows.
1st, the present invention provides ion mobility spectrometry and semiconductor gas sensor integrated detection system, by ion mobility spectrometry with semiconductor gas sensor combines it is proposed that a kind of new integrated detection system；Including ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit, described signal processing circuit includes ion mobility spectrometry sensor signal conditioning circuit, ADC store circuit and host computer telecommunication circuit, and described control circuit includes ion fence gate control circuit, ADC collection sequential control circuit, semiconductor transducer control circuit；Accurately chemical warfare agent can be detected, and energy quick detection indusrial toxic harmful gas, it is with a wide range of applications.It is that 80ppm CO sample gas has carried out the experimental verification of integrated detection system that the present invention selects concentration, obtains the detection output signal of CO ion mobility spectrometry and semiconductor gas sensor, gives the recognition methodss of CO.
Brief description
Fig. 1 is the population structure block diagram of ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system.
Fig. 2 is the ADC store circuit connection figure of ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system.
Fig. 3 is the semiconductor transducer electric operation control circuit figure of ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system.
Specific embodiment
As shown in figure 1, the population structure block diagram for ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system.In figure, including power pack, ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit；Its structural feature is：Described power pack is powered to respectively ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit, described ion migration spectrum sensor auxiliary circuit includes migrating ring bleeder circuit, ion fence gate power supply circuits, described signal processing circuit includes ion mobility spectrometry sensor signal conditioning circuit, ADC store circuit and host computer telecommunication circuit, and described control circuit includes ion fence gate control circuit, ADC collection sequential control circuit, semiconductor transducer control circuit；Described ion fence gate control circuit is connected with ion migration spectrum sensor auxiliary circuit, and described semiconductor transducer control circuit connects semiconductor transducer, and described ADC collection sequential control circuit connects ADC store circuit；Described ion migration spectrum sensor auxiliary circuit is connected with ion mobility spectrometry sensor signal conditioning circuit.
Ion migration spectrum sensor auxiliary circuit of the present invention is divided into one-level amplifier, two grades of amplifiers and low-pass filtering 3 part.Faint current signal is amplified by one-level amplifier, is converted into voltage signal, and amplitude is about hundreds of mV；Two grades of amplifiers carry out isolating difference amplification to the output of one-level amplifier, remove IMS signal baseline, signal is amplified 5～10 times, and after conditioning, signal amplitude is close to AD sampling range, lower quantization error as far as possible；Low-pass filtering includes two stage filter, and the first order is the eight rank Butterworth filters of cut-off frequency 50kHz, and the second level is cut-off frequency 20kHz two rank Butterworth filter, obtains baseline stable IMS signal.
Described power pack includes positive or negative high voltage module and low-voltage module.
Described semiconductor transducer adopts gas sensory sensor MP-7 and WSP2110.
As shown in Fig. 2 the ADC store circuit connection figure for ion mobility spectrometry of the present invention and semiconductor gas sensor integrated detection system.In figure, described ADC store circuit includes ARM9 series S3C2440,16 ADC chip ADS8556IPM and FPGAEP2C5, described ARM9S3C2440 is connected with 16 ADC chip ADS8556IPM corresponding ports, and described FPGAEP2C5 is connected with 16 ADC chip ADS8556IPM corresponding ports；Described ARM completes the storage of the initialization of ADS8556 internal register, the reading of ion migration spectrum signal adc data and gathered data.When ADS8556IPM works in software pattern, setting internal reference voltage is 3.0V, and voltage range is ± 4 times of internal reference voltages, parallel reading ADC transformation result in units of word.Set up internal register, ADS8556 is placed in hardware mode, treat FPGA door synchronizing signal effectively, sampling pulse rising edge, ARM reads ADS8556 LPT data with tape symbol 16 system, is stored in SDRAM chip.
Described semiconductor transducer control circuit includes semiconductor transducer and drives pwm signal to occur and driving voltage regulation power amplifier.Described MP-7 type semiconductor transducer is driven by the pwm signal of dutycycle 20%, high level lasting time 30s in signal period, low duration 120s；Described WSP2110 type semiconductor transducer is driven by 5V level signal.ARM output pwm signal low level 0V, high level 3.3V, through circuit as shown in Figure 3, can be exchanged into low level 1.5V, the pwm signal of high level 5.0V, and driving current is up to more than 1A.
It is understandable that, above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to the technical scheme described by the embodiment of the present invention, it will be understood by those within the art that, still the present invention can be modified or equivalent, to reach identical technique effect；As long as meeting and using needs, all within protection scope of the present invention.
Claims (4)
1. ion mobility spectrometry and semiconductor gas sensor integrated detection system, including power pack, ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit；It is characterized in that：Described power pack is powered to respectively ion migration spectrum sensor auxiliary circuit, semiconductor transducer, signal processing circuit, control circuit, described ion migration spectrum sensor auxiliary circuit includes migrating ring bleeder circuit, ion fence gate power supply circuits, described signal processing circuit includes ion mobility spectrometry sensor signal conditioning circuit, ADC store circuit and host computer telecommunication circuit, and described control circuit includes ion fence gate control circuit, ADC collection sequential control circuit, semiconductor transducer control circuit；Described ion fence gate control circuit is connected with ion migration spectrum sensor auxiliary circuit, and described semiconductor transducer control circuit connects semiconductor transducer, and described ADC collection sequential control circuit connects ADC store circuit；Described ion migration spectrum sensor auxiliary circuit is connected with ion mobility spectrometry sensor signal conditioning circuit.
2. the ion mobility spectrometry according to claim 1 and semiconductor gas sensor integrated detection system it is characterised in that：Described power pack includes positive or negative high voltage module and low-voltage module.
3. the ion mobility spectrometry according to claim 1 and semiconductor gas sensor integrated detection system it is characterised in that：Described semiconductor transducer adopts gas sensory sensor MP-7 and WSP2110.
4. ion mobility spectrometry according to claim 1 and semiconductor gas sensor integrated detection system it is characterised in that：Described ADC store circuit includes ARM9 series S3C2440,16 ADC chip ADS8556IPM and FPGAEP2C5, described ARM9S3C2440 is connected with 16 ADC chip ADS8556IPM corresponding ports, and described FPGAEP2C5 is connected with 16 ADC chip ADS8556IPM corresponding ports.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510517827.4A CN106468685A (en) | 2015-08-23 | 2015-08-23 | Ion mobility spectrometry and semiconductor gas sensor integrated detection system |
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| CN201510517827.4A CN106468685A (en) | 2015-08-23 | 2015-08-23 | Ion mobility spectrometry and semiconductor gas sensor integrated detection system |
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| CN201510517827.4A Pending CN106468685A (en) | 2015-08-23 | 2015-08-23 | Ion mobility spectrometry and semiconductor gas sensor integrated detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941895A (en) * | 2017-11-10 | 2018-04-20 | 中国人民解放军陆军防化学院 | Ionic migration spectrum detection instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941895A (en) * | 2017-11-10 | 2018-04-20 | 中国人民解放军陆军防化学院 | Ionic migration spectrum detection instrument |
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Application publication date: 20170301 |
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| WD01 | Invention patent application deemed withdrawn after publication |