CN105181618A - Outdoor VOC gas monitoring system - Google Patents
Outdoor VOC gas monitoring system Download PDFInfo
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- CN105181618A CN105181618A CN201510682503.6A CN201510682503A CN105181618A CN 105181618 A CN105181618 A CN 105181618A CN 201510682503 A CN201510682503 A CN 201510682503A CN 105181618 A CN105181618 A CN 105181618A
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Abstract
The invention discloses an outdoor VOC gas monitoring system. The system comprises multiple VOC monitoring terminals arranged outdoors and a data receiving station in communication with VOC. Each VOC monitoring terminal comprises a VOC gas chamber, and a VOC sensor and a gas pump which are arranged in the VOC gas chamber, as well as a VOC circuit board electrically connected with the VOC sensor, and a power module. A gas inlet of the VOC gas chamber is connected with a front processing pipe internally provided with a molecular sieve, and the content of the molecular sieve is in direct proportion to the humidity of an outdoor environment where the VOC gas chamber is positioned. The outdoor VOC gas monitoring system can realize monitoring for 24 hours, and is low in cost and convenient to use.
Description
Technical field
The present invention relates to the outdoor on-line monitoring technique of volatile organic gas.
Background technology
In the national environmental protection method that China promulgates, the clear stipulaties technique of serious environment pollution, equipment and product carry out elimination system, promote the use of water paint, encourage to produce and sell and use low toxicity, low volatile organic solvent, require that enterprise adopts advanced production technology and Treatment process, guarantee that VOC pollutes and controlled and administer.
The voc on-line monitoring of current commercial type is all detect at pollution source fixed point monitoring or hand-held mostly, and it is of limited application, all indoor range mostly, can guarantee that monitoring device can obtain direct power lead and power, simultaneously due to need not outdoor be directly exposed to, in order to avoid sealing instrument, damp-proof treatment has been carried out in indoor, and the gas of therefore monitoring also does not need advanced processing.And this instrument is when being used in outdoor, the impact of weather and air humidity can be subject to, thus causes monitoring result inaccurate.
Summary of the invention
The present invention is in order to solve the problem of above-mentioned prior art, a kind of outdoor VOC gas monitoring system is proposed, comprise multiple VOC monitoring terminal being located at open air, the DRS of communication is carried out with VOC, described VOC sense terminals comprises: VOC air chamber, VOC circuit board, the power module being located at VOC sensor in VOC air chamber and air pump, being connected with VOC sensor electrical, the air intake opening of described VOC air chamber is connected with pre-treatment pipe, be provided with molecular sieve in described pre-treatment pipe, the content of described molecular sieve is directly proportional to the humidity of the outdoor environment residing for VOC air chamber.
In the technical program, power module comprises solar cell, accumulator and power circuit, and described power circuit comprises charge protector, discharge protection circuit and timing reset circuit.
VOC monitoring terminal and DRS adopt wireless telecommunications.
VOC circuit board comprises the signal processing circuit for receiving VOC sensor signal disposed thereon, the single-chip microcomputer be connected with signal processing circuit.
The present invention connects air pump via solar cell and carries out gas sample, simultaneously that VOC gas concentration signal is transformed laggard line number is reportedly defeated for VOC sensor, utilize wireless GPRS functional module that data message is sent to DRS, without the need to expend time in and cost additionally sets up entity circuit, significantly improve the efficiency of data transmission, realize " plug and play " of VOC monitoring terminal, have concurrently simple and easy install and use and data real time remote transmission effect.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present invention;
Fig. 2 is the explosive view of pre-treatment pipe of the present invention;
Fig. 3 is the schematic appearance of VOC air chamber of the present invention.
Embodiment
Below in conjunction with drawings and Examples, structural principle of the present invention is described.
The outdoor VOC gas monitoring system of the present invention's design, comprises DRS, and is arranged on outdoor multiple VOC monitoring terminals, adopts wireless telecommunications, such as, utilize GPRS to carry out wireless telecommunications etc. between these VOC monitoring terminal and DRSs.
As shown in Figure 1 to Figure 3, VOC monitoring terminal mainly comprises VOC air chamber 1, VOC sensor, air pump, VOC circuit board, power module wireless communication module and pre-treatment pipe.Because VOC monitoring terminal is arranged on open air, and water vapor in the air of open air can not by the PID lamp ionization of VOC sensor, but it can reflect in the ionization cavity of VOC sensor, scattering and absorption ultraviolet light.Non-ionic steam (IP value is greater than the material of lamp energy), such as methane, also may as water vapor scattering ultraviolet light, thus reduce the sensitivity of detecting device.Air along with sampling together enters into the sensitivity that the dust of VOC air chamber and fine particle can reduce VOC sensor equally, the particle be deposited in VOC sensor window also may reduce the radiation of air of PID lamp to sampling, and water vapor or other hotter gas and the condensation of steam on window also have same impact.So the present embodiment adopts the VOC air chamber of aluminum to cover VOC sensor hermetically, the air intake opening of VOC air chamber 1 is connected with pre-treatment pipe 2, molecular sieve is provided with in pre-treatment pipe 2, adopt the molecular sieve dewatered as drying agent, the content of molecular sieve is directly proportional to the humidity of the outdoor environment residing for VOC air chamber.Pre-treatment pipe 2 comprises body 21 and lid 22, body one end open, and the other end is provided with the gas outlet be connected with VOC air chamber, lid and opening are tightly connected, lid is provided with the air intake opening identical with gas outlet bore, and the internal diameter of its middle tube body is 19mm, and the internal diameter of entry/exit gas port is 3.2mm.
The present embodiment adopts model to be that the piD-TECHeVx photoion sensor of Baseline-MOCON is as VOC sensor.PiD-TECHeVx sensor is the ultraviolet light VOC gas sensor of a imported with original packaging, has high sensitivity and stability, can detect the gas of more than 5ppb.In addition, it also has the advantages such as compact, low price, fast response time.
VOC sensor exports analog voltage signal, and the VOC content that analog voltage signal detects with it is linear.VOC circuit board comprises the signal processing circuit for receiving VOC sensor signal disposed thereon, the single-chip microcomputer be connected with signal processing circuit.PiD-TECHeVx photoion sensor is after adding operating voltage+5.5V, VOC sensor will detect VOC content automatically, and this module has digital signal to export and analog signal output two kinds of modes, analog signal output mode is adopted data to be sent to after signal processing circuit processes, send single-chip microcomputer to again, single-chip microcomputer carries out initialization, then signal is sent into A/D converter and carry out analog to digital conversion, then data acquisition is carried out, and the result detected is shown, judge whether to exceed standard, if exceed standard, then carry out reporting to the police or notify long-range DRS.The 4th road analog input channel AIN3 of A/D converter PCF8591, the VOC content data of collection are aggregated in the storer of single-chip microcomputer by this passage just.
The wireless communication module of the present embodiment is GPRS communication module, GPRS communication module selects the Related product of Siemens, GPRS communication module is adopted instrument main frame with number and is used UART serial interface, data communication protocol meets GB 212 agreement, support double frequency GSM/GPRS, meet ETSIGSMPhase2+ standard, make VOC monitoring terminal always online, support A5/1 & A5/5 cryptographic algorithm, transparent data transfer and protocol conversion, support virtual data private, short message data alternate channel (option), support dynamic data center domain name and IP address, support RS-232/422/485 or Ethernet interface, software upgrading is carried out by Xmodem Protocol, and possess self diagnosis, alarm output and interference free performance, be suitable for the demand applied in electromagnetic environment rugged surroundings.
The power module of the present embodiment comprises solar cell, accumulator and power circuit, and described power circuit comprises charge protector, discharge protection circuit and timing reset circuit.Due to the tangible field work of VOC monitoring terminal, be difficult to power taking, therefore power module adopts advanced power technology, and power supply accommodation is wide, and stability is better, and apolegamy moisture-proof case, is applicable to outdoor application.Diode be used for overcast and rainy and night without sunshine time ,+12V accumulator is to solar-electricity tank discharge.
Utilize the present invention can measure the gas concentration (isobutylene reference units) of VOC organic volatile.If know, targeted environment is certain single VOC gas, can accurately measure the actual concentration value of this gas.Such as know it is benzene, after the CF value of benzene can be inputted, obtain correct benzene value.If object gas is multiple VOC gas, and know that certain gas occupies vast scale, the concentration value of this kind of gas can be accurately measured.If probably know, which kind object gas has, can as the alarm entering hazardous area.Such as fire-fighting, accident emergency rescue, sewer prospecting etc.Usual method is: the kind probably known according to convention, and the alarming threshold value of that VOC gas selecting alarming threshold value minimum, as alarming threshold value, reminds people to evade hazardous environment.
Should be understood that, the above-mentioned description for specific embodiment is comparatively detailed, and therefore can not think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (6)
1. an outdoor VOC gas monitoring system, comprise multiple VOC monitoring terminal being located at open air, the DRS of communication is carried out with VOC, described VOC sense terminals comprises: VOC air chamber, VOC circuit board, the power module being located at VOC sensor in VOC air chamber and air pump, being connected with VOC sensor electrical, it is characterized in that, the air intake opening of described VOC air chamber is connected with pre-treatment pipe, be provided with molecular sieve in described pre-treatment pipe, the content of described molecular sieve is directly proportional to the humidity of the outdoor environment residing for VOC air chamber.
2. outdoor VOC gas monitoring system as claimed in claim 1, it is characterized in that, described power module comprises solar cell, accumulator and power circuit, and described power circuit comprises charge protector, discharge protection circuit and timing reset circuit.
3. outdoor VOC gas monitoring system as claimed in claim 1, is characterized in that, described VOC monitoring terminal and DRS adopt wireless telecommunications.
4. outdoor VOC gas monitoring system as claimed in claim 1, is characterized in that, described VOC circuit board comprises the signal processing circuit for receiving VOC sensor signal disposed thereon, the single-chip microcomputer be connected with signal processing circuit.
5. outdoor VOC gas monitoring system as claimed in claim 1, is characterized in that, the diameter of described pre-treatment pipe is 19mm.
6. outdoor VOC gas monitoring system as claimed in claim 1, is characterized in that, described VOC sensor employing model is the piD-TECHeVx photoion sensor of Baseline-MOCON.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510682503.6A CN105181618A (en) | 2015-10-21 | 2015-10-21 | Outdoor VOC gas monitoring system |
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| CN201510682503.6A CN105181618A (en) | 2015-10-21 | 2015-10-21 | Outdoor VOC gas monitoring system |
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| CN105181618A true CN105181618A (en) | 2015-12-23 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388208A (en) * | 2015-12-14 | 2016-03-09 | 河南省建筑科学研究院有限公司 | PID-based air VOC monitoring machine and remote monitoring realization method thereof |
| CN105572218A (en) * | 2016-03-03 | 2016-05-11 | 苏州意维思自动化科技有限公司 | VOC air detection equipment and network system provided with same |
| CN106124703A (en) * | 2016-07-06 | 2016-11-16 | 中山市森灿光电科技有限公司 | Intelligent indoor air detection management system |
| CN107179371A (en) * | 2017-08-01 | 2017-09-19 | 苏州市光生环境科技有限公司 | A kind of VOC on-line checkings instrument instrumentation control system |
| CN107302684A (en) * | 2017-05-22 | 2017-10-27 | 中国环境科学研究院 | Risk source video and parameter monitoring device and its monitoring system |
| CN108196003A (en) * | 2017-11-28 | 2018-06-22 | 浙江海洋大学 | Ye Huogang areas VOCs concentration automatic monitoring and alarming system and monitoring and pre-alarming method |
| CN109724850A (en) * | 2019-01-11 | 2019-05-07 | 北京博赛德科技有限公司 | A kind of Soviet Union's Ma tank intellegent sampling device |
| CN109781476A (en) * | 2019-02-28 | 2019-05-21 | 中山大学惠州研究院 | The distribution mode of VOCs detection device and its sample cover in laboratory environment |
| CN112683834A (en) * | 2020-12-31 | 2021-04-20 | 华南智能机器人创新研究院 | Method and system for measuring pollution source by ultraviolet differential absorption method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388208A (en) * | 2015-12-14 | 2016-03-09 | 河南省建筑科学研究院有限公司 | PID-based air VOC monitoring machine and remote monitoring realization method thereof |
| CN105572218A (en) * | 2016-03-03 | 2016-05-11 | 苏州意维思自动化科技有限公司 | VOC air detection equipment and network system provided with same |
| CN106124703A (en) * | 2016-07-06 | 2016-11-16 | 中山市森灿光电科技有限公司 | Intelligent indoor air detection management system |
| CN107302684A (en) * | 2017-05-22 | 2017-10-27 | 中国环境科学研究院 | Risk source video and parameter monitoring device and its monitoring system |
| CN107179371A (en) * | 2017-08-01 | 2017-09-19 | 苏州市光生环境科技有限公司 | A kind of VOC on-line checkings instrument instrumentation control system |
| CN108196003A (en) * | 2017-11-28 | 2018-06-22 | 浙江海洋大学 | Ye Huogang areas VOCs concentration automatic monitoring and alarming system and monitoring and pre-alarming method |
| CN108196003B (en) * | 2017-11-28 | 2020-10-23 | 浙江海洋大学 | Monitoring and early warning method based on automatic monitoring and early warning system for VOCs concentration in liquid cargo harbor area |
| CN109724850A (en) * | 2019-01-11 | 2019-05-07 | 北京博赛德科技有限公司 | A kind of Soviet Union's Ma tank intellegent sampling device |
| CN109781476A (en) * | 2019-02-28 | 2019-05-21 | 中山大学惠州研究院 | The distribution mode of VOCs detection device and its sample cover in laboratory environment |
| CN112683834A (en) * | 2020-12-31 | 2021-04-20 | 华南智能机器人创新研究院 | Method and system for measuring pollution source by ultraviolet differential absorption method |
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