CN105158325A - Photoionization detector - Google Patents
Photoionization detector Download PDFInfo
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- CN105158325A CN105158325A CN201510457554.9A CN201510457554A CN105158325A CN 105158325 A CN105158325 A CN 105158325A CN 201510457554 A CN201510457554 A CN 201510457554A CN 105158325 A CN105158325 A CN 105158325A
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- detector
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- ionization chamber
- photoionization detector
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Abstract
A photoionization detector is disclosed and relates to the technical field of examination detection. The photoionization detector is characterized in that the detector comprises an intake valve, an UA lamp power supply, an ultraviolet lamp, an ionization chamber, n offset voltage, an amplification circuit, an air exhaust opening, a data acquisition module, a processing unit module and a display module; the intake valve, the ultraviolet lamp and the offset voltage are respectively connected with the ionization chamber, the UA lamp power supply is connected with the ultraviolet lamp, the ionization chamber is connected with the air exhaust opening, and the ionization chamber is successively connected with the amplification circuit, the data acquisition module, the processing unit module and the display module. By using the photoionization detector, after being detected, ions are afresh compounded for forming an original gas and steam, and the detector possesses the advantages of small volume, high resolution ratio, good real-time property, safety, carrying convenience and the like.
Description
Technical field
The present invention relates to inspection technical field, be specifically related to a kind of photoionization detector.
Background technology
Photoionization detector (PhotoionizationDetector is called for short PID) utilizes photoionization technology to detect specific volatile organic compound (VolatileOrganicCompounds is called for short VOC) concentration, a kind of have high sensitivity, the detecting device of extensive use, its principle of work is when measured matter is subject to the irradiation higher than the uviol lamp of self-ionization energy, charged ion can be ionized to owing to absorbing the energy of high-energy photons, directed mobile formation electric current can be there is in charged ion under the effect of extra electric field, by just can record the concentration of measured matter to the detection of size of current, thus remind the material of this concentration of people whether harmful, exceed standard, play protection people inherently safe object.
Along with the progress of civilization, the mankind use and in environment, likely discharge the quantity of the product of poisonous substance and frequency also increases greatly, we are faced with various chemical hazard constantly, such as from the poisonous gas in confined space, the unexpected catastrophic chemical spill that industry or shipping accident cause, etc.; Recently, the ghost of death is brought in again in the danger that we face by the chemical weapons that war or terrorist use, our safety only depends on and just find these hazardous gases before we comes to harm, and we need a kind of portable instrument with the danger of warning us to face.Perhaps the more important thing is, tell us the degree of current dangerous.
Faced with this situation, scientists starts to study this respect very early, has successively invented a variety of detecting devices, as hydrogen flame detector, and thermal conductivity detector (TCD), photoionization detector etc.Due in early time, people are to the shortage of light technical know-how, and hydrogen flame detector occupies leading position always.
Summary of the invention
The object of this invention is to provide a kind of photoionization detector, it is little that it has volume, and resolution is high, and real-time is good, security and the advantage such as easy to carry.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: it comprises gas admittance valve, UA lamp power supply, uviol lamp, chamber, bias voltage, amplifying circuit, exhausr port, data acquisition module, processing unit module, display module, gas admittance valve, uviol lamp, bias voltage are connected with chamber respectively, UA lamp power supply is connected with uviol lamp, chamber is connected with exhausr port, and chamber is connected with amplifying circuit, data acquisition module, processing unit module, display module successively.
The present invention adopts the uviol lamp of 10.6eV, accurately calculate the size of the core components such as ionization chamber, adopt the amplification chip AD549 of low-leakage current, 24 AD, ARM9 process chip, with high-octane UV-irradiation organism, will ionize when the energy of energy lower than uviol lamp needed for organism ionization, the electronics produced after ionization forms faint electric current under the effect of extra electric field, by drawing organic concentration to the detection of the current signal after amplification.
Advantage of the present invention:
1, compare and other detecting devices, outstanding feature is exactly that after ion is detected, be again combined into original gas and steam, that is it is not disruptive detecting device;
2, also there is volume little, resolution is high, real-time is good, security and the important advantage such as easy to carry, real-time information feed back can be provided for staff, guarantee the safety of staff, for the strick precaution of potential leakage accident, automatic monitoring alarm, incident area confirmation aspect also has broad application prospects.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Embodiment
With reference to Fig. 1, a kind of photoionization detector, it comprises gas admittance valve 1, UA lamp power supply 2, uviol lamp 3, chamber 4, bias voltage 5, amplifying circuit 6, exhausr port 7, data acquisition module 8, processing unit module 9, display module 10, gas admittance valve, uviol lamp, bias voltage are connected with chamber respectively, UA lamp power supply is connected with uviol lamp, chamber is connected with exhausr port, and chamber is connected with amplifying circuit, data acquisition module, processing unit module, display module successively.
Claims (1)
1. photoionization detector, it is characterized in that it comprises gas admittance valve, UA lamp power supply, uviol lamp, chamber, bias voltage, amplifying circuit, exhausr port, data acquisition module, processing unit module, display module, gas admittance valve, uviol lamp, bias voltage are connected with chamber respectively, UA lamp power supply is connected with uviol lamp, chamber is connected with exhausr port, and chamber is connected with amplifying circuit, data acquisition module, processing unit module, display module successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457554.9A CN105158325A (en) | 2015-07-30 | 2015-07-30 | Photoionization detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457554.9A CN105158325A (en) | 2015-07-30 | 2015-07-30 | Photoionization detector |
Publications (1)
| Publication Number | Publication Date |
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| CN105158325A true CN105158325A (en) | 2015-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510457554.9A Pending CN105158325A (en) | 2015-07-30 | 2015-07-30 | Photoionization detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911132A (en) * | 2016-06-28 | 2016-08-31 | 广州市桂勤器械设备工程有限公司 | Portable medical detection device for oil content of compressed air |
| CN106290722A (en) * | 2016-07-27 | 2017-01-04 | 李朝林 | VOC substance detecting method in a kind of circulating gas based on UV photodissociation |
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|---|---|---|---|---|
| US5773833A (en) * | 1996-03-22 | 1998-06-30 | Rae Systems, Inc. | Photo-ionization detector for volatile gas measurement |
| US6225633B1 (en) * | 1998-10-22 | 2001-05-01 | Rae Systems, Inc. | Photo-ionization detector for volatile gas measurement and a method for self-cleaning the same |
| EP1262770A2 (en) * | 2001-05-29 | 2002-12-04 | Rae Systems, Inc. | Photo-ionization detector and method for continuous operation and real-time self-cleaning |
| WO2006012777A1 (en) * | 2004-08-06 | 2006-02-09 | Rae Systems (Shanghai) Inc. | An integrated photoionization sensor |
| WO2008043201A1 (en) * | 2006-10-08 | 2008-04-17 | Rae Systems (Shanghai) Inc. | Photo-ionization sensor for detecting the concentration of gas and method thereof |
| CN101308125A (en) * | 2007-05-18 | 2008-11-19 | 华瑞科学仪器(上海)有限公司 | Photoionization detector, gas-chromatography detection system and chromatographic detector method |
| CN101603945A (en) * | 2009-07-13 | 2009-12-16 | 中北大学 | Portable photo-ionization gas detector |
| CN202974961U (en) * | 2012-12-05 | 2013-06-05 | 中国科学院大连化学物理研究所 | Photoionization detector |
| CN103424465A (en) * | 2013-07-26 | 2013-12-04 | 华瑞科学仪器(上海)有限公司 | Intelligent PID sensor module |
| CN103575839A (en) * | 2012-07-18 | 2014-02-12 | 中国科学院电子学研究所 | High sensitivity photoionization detector |
-
2015
- 2015-07-30 CN CN201510457554.9A patent/CN105158325A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773833A (en) * | 1996-03-22 | 1998-06-30 | Rae Systems, Inc. | Photo-ionization detector for volatile gas measurement |
| US6225633B1 (en) * | 1998-10-22 | 2001-05-01 | Rae Systems, Inc. | Photo-ionization detector for volatile gas measurement and a method for self-cleaning the same |
| EP1262770A2 (en) * | 2001-05-29 | 2002-12-04 | Rae Systems, Inc. | Photo-ionization detector and method for continuous operation and real-time self-cleaning |
| WO2006012777A1 (en) * | 2004-08-06 | 2006-02-09 | Rae Systems (Shanghai) Inc. | An integrated photoionization sensor |
| WO2008043201A1 (en) * | 2006-10-08 | 2008-04-17 | Rae Systems (Shanghai) Inc. | Photo-ionization sensor for detecting the concentration of gas and method thereof |
| CN101308125A (en) * | 2007-05-18 | 2008-11-19 | 华瑞科学仪器(上海)有限公司 | Photoionization detector, gas-chromatography detection system and chromatographic detector method |
| CN101603945A (en) * | 2009-07-13 | 2009-12-16 | 中北大学 | Portable photo-ionization gas detector |
| CN103575839A (en) * | 2012-07-18 | 2014-02-12 | 中国科学院电子学研究所 | High sensitivity photoionization detector |
| CN202974961U (en) * | 2012-12-05 | 2013-06-05 | 中国科学院大连化学物理研究所 | Photoionization detector |
| CN103424465A (en) * | 2013-07-26 | 2013-12-04 | 华瑞科学仪器(上海)有限公司 | Intelligent PID sensor module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911132A (en) * | 2016-06-28 | 2016-08-31 | 广州市桂勤器械设备工程有限公司 | Portable medical detection device for oil content of compressed air |
| CN106290722A (en) * | 2016-07-27 | 2017-01-04 | 李朝林 | VOC substance detecting method in a kind of circulating gas based on UV photodissociation |
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Application publication date: 20151216 |