CN201517991U - Ozone concentration tester - Google Patents
Ozone concentration tester Download PDFInfo
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- CN201517991U CN201517991U CN2009202393033U CN200920239303U CN201517991U CN 201517991 U CN201517991 U CN 201517991U CN 2009202393033 U CN2009202393033 U CN 2009202393033U CN 200920239303 U CN200920239303 U CN 200920239303U CN 201517991 U CN201517991 U CN 201517991U
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Abstract
The utility model discloses an ozone concentration tester which comprises an ultraviolet lamp, and further comprises an ultraviolet absorbing cavity, wherein two air gaps with different lengths are formed in the ultraviolet absorbing cavity, the ultraviolet absorbing cavity is further provided with two light ports, each light port respectively corresponds to one air gap, one path of light emitted from an ultraviolet lamp penetrates through the first air gap through the first light port, and the other path penetrates through the second air gap through the second air port. The ozone concentration tester can solve the measurement errors of ozone concentration testers in the prior art due to environment influence and asynchronous test, and improve the measurement precision.
Description
Technical field
The utility model relates to a kind of ozone concentration tester, especially relates to a kind of double light path ozone concentration tester, belongs to the ozone field of measuring technique.
Background technology
Along with the continuous development of China's ozone technology industry, ozone generator manufacturer and application units increase year by year, be different from chemical titration fast, accurately, the research of ozone concentration detector intuitively has been extremely urgent.Present ozone concentration tester both domestic and external adopts electrochemical process or ultraviolet absorption method mostly, and the electrochemical process deadly defect is the shelf life weak point and the access times restriction is arranged that use cost is higher, so adopt ultraviolet absorption method mostly.Ultraviolet absorption method is to utilize the characteristic of ozone to the ultraviolet signature absorption of 254nm wavelength, the analytical instrument that produces according to Beer-Lambert law (Beer-Lambert law), ozone concentration in both can detected gas also can detect the molten ozone concentration of depositing in the water.
Fig. 1 shows the structural representation of the at present domestic a kind of ultraviolet absorption method ozone concentration tester that generally adopts.Described ozone concentration tester comprises uviol lamp 101 and UVA chamber 103, and the ultraviolet ray that described uviol lamp 101 sends filters through light path 106 to filter unit 102, and the ultraviolet ray after the optical filtering enters described UVA chamber 103 through light path 106.Described uv absorption chamber 103 has gas circuit 105, and reference gas and test gas enter described UVA chamber 103 by described gas circuit 105.Described ozone concentration tester also comprises control module 104, is used to realize detection, signal amplification and the functions such as output and demonstration of ozone concentration.There is the defective of two aspects in the ozone concentration tester of this traditional structure: (1) is owing to all need reference gas to return to zero by described UVA chamber 103 during each the measurement, the reference air is directly taken from surrounding air, itself has drop ozone, and reference gas alternately enters same absorbing cavity 103 with the test gas that contains ozone, cause drop ozone remaining in the absorbing cavity to influence reference gas, cause reference gas consistance variation, influence the measuring accuracy of tester; (2) because test gas and reference gas alternately enter UVA chamber 103, the ultraviolet ray that control module 104 detects is poor with the light intensity data life period through test gas through the light intensity data of reference gas, be that data are asynchronous, therefore, because when the variation of uviol lamp 101 itself or its power supply and relevant with it device have slight parameter to change, all will make a big impact, thereby influence the measuring accuracy of tester the ozone concentration test result.
At the defective that above-mentioned ozone concentration tester exists, external part instrument manufacturing firm has proposed the double light path tester, and Fig. 2 shows the structural representation of double light path ozone concentration tester.As shown in the figure, the ultraviolet ray that uviol lamp 201 sends enters a spectrophotometric unit 203 after filter unit 202 filters, and road light path 207 originally is divided into light path 208 and 209 two light paths of light path through described spectrophotometric unit 203.Wherein, light path 208 enters UVA chamber 204, and light path 209 enters UVA chamber 205, and described two UVA chambeies 204 and 205 gas length equate, be L.Described uv absorption chamber 204 has gas circuit 210, is used for importing test gas; Described uv absorption chamber 205 has gas circuit 211, is used for importing reference gas.Described ozone concentration tester also comprises control module 206, is used to realize detection, signal amplification and the functions such as output and demonstration of this tester ozone concentration.Described double light path ozone concentration tester is divided into two-way by spectrophotometric unit 203 with the light that a uviol lamp 201 sends, enter the UVA chamber 205 of the equal reference gas of gas length and the uv absorption chamber 204 of test gas respectively, like this, can guarantee that reference gas and test gas carry out the measurement of data simultaneously, solved the nonsynchronous problem of data, avoided because ultraviolet light changes the influence to measurement data.But this tester still need derive from surrounding air when each measurement the reference gas returns to zero, and reference gas is easily affected by environment, causes measurement result to have inevitable error.
Summary of the invention
The purpose of this utility model provides a kind of ozone concentration tester, and the ozone concentration tester improves the measuring accuracy of ozone concentration tester owing to environmental impact and the asynchronous measuring error that causes of test in the solution prior art.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of ozone concentration tester comprises uviol lamp, it is characterized in that, also comprises a UVA chamber, and inside, described UVA chamber is formed with two unequal air gaps of length; Described UVA chamber also has two light mouths, and respectively corresponding one of them air gap of described each light mouth, the light that described uviol lamp sends are leaded up to the first light mouth and passed first air gap, and interstice is passed by the second light mouth in another road.
According to the utility model, between described uviol lamp and described UVA chamber, be provided with filter unit, the light that described uviol lamp sends enters the light mouth in described UVA chamber after described filter unit filters.
According to the utility model, described filter unit preferably adopts optical filter to realize.
According to the utility model, described ozone concentration tester also comprises control module, described control module has photoelectric switching circuit, automatic gain amplifying circuit and the main treatment circuit that is linked in sequence, and described automatic gain amplification circuit output end connects the A/D change-over circuit in the described main treatment circuit.
Described automatic gain amplifying circuit preferably adopts programmable gain amplifier to realize.
Compared with prior art, advantage of the present utility model and good effect are:
1, the UVA chamber is made of air gaps long, short two different lengths, forms double beam system.On the one hand, the ultraviolet light that the uviol lamp synchronization sends has solved owing to the asynchronous measuring error that causes of test well through described double light path; On the other hand, when using, instrument carries out school zero by the gas (as oxygen) of introducing pure ozone free earlier, and when measuring, two light paths are passed tested ozone gas simultaneously, with wherein one the tunnel as Real-time and Dynamic zero point, carry out the concentration that computing can obtain tested ozone gas by the difference of measuring two-way, make the value mode at zero point of tester no longer be subjected to the influence of ambient air quality, solved because the measuring error that environmental impact causes.
2, control module adopts the automatic gain amplifying circuit to realize the measurement electric signal of varying strength is amplified automatically, guarantee that the measuring-signal in all measurement ranges can reach the full accuracy of design, measuring speed is fast, precision is high, can realize continuous, on-line measurement.
Description of drawings
Fig. 1 is the structural representation of first kind of ozone concentration tester of prior art;
Fig. 2 is the structural representation of second kind of ozone concentration tester of prior art;
Fig. 3 is the structural representation of an embodiment of the utility model ozone concentration tester;
Fig. 4 is the partial circuit structural representation of control module among Fig. 3;
Fig. 5 is the physical circuit connection layout of automatic gain amplifying circuit among Fig. 4.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
See also the structural representation of an embodiment of the utility model ozone concentration tester shown in Figure 3.The ozone concentration tester of described embodiment comprises a uviol lamp 301 and a UVA chamber 304, and described absorbing cavity 304 has two light mouths, is respectively the first light mouth 306 and the second light mouth 307.304 inside, described UVA chamber are provided with leaded light post 308 and 309, and first air gap and the length that are formed with length between the described leaded light post 308 and 309 and are L1 are the interstice of L2, and L1＞L2.The light that described uviol lamp 301 sends is divided into two-way, i.e. first light path 310 and second light path 311.First light path 310 after filter unit 302 filters is passed first air gap that described length is L1 by the described first light mouth 306, and second light path 311 after filter unit 303 filters is passed the interstice that described length is L2 by the described second light mouth 307.Described filter unit 302 and the 303 preferred optical filters that adopt certainly, also can adopt other to realize the components and parts that ultraviolet ray filters.
Described UVA chamber 304 has one tunnel gas circuit 312, and when using the ozone concentration tester, at first the gas with pure ozone free feeds to described UVA chamber 304 by described gas circuit 312, and the ozone concentration tester is carried out the instrument zeroing.When measurement contains ozone concentration in the gas of ozone, tested ozone gas feeds to described UVA chamber 304 by described gas circuit 312, and described first light path 310 and described second light path 311 are passed the tested ozone gas in the described UVA chamber 304 simultaneously.Because be formed with the air gap that two length are respectively L1 and L2 in the described uv absorption chamber 304, and L1＞L2, therefore, ultraviolet light has two different light intensity datas by behind the tested ozone gas of these two air gaps.Utilize control module 305 to measure these two different light intensity datas, can calculate the concentration of tested ozone gas then according to Beer-Lambert law.Thus, when measuring ozone concentration, with the light intensity data that passes one of them air gap ozone gas as Real-time and Dynamic zero point, pass the difference of the two-way light intensity of two air gap ozone gas by measurement and carry out computing, the final concentration that obtains tested ozone gas, the measuring error that both can avoid environment that the zero test gases affect is caused has also solved the asynchronous measuring error that causes of test data, has significantly improved the measuring accuracy of tester.
Among the described embodiment, control module 305 is mainly used in detection, signal amplification, analog to digital conversion and the functions such as output and demonstration that realize ozone concentration.Because this tester measurement range broad is 0-200mg/l.Under the situation of measurement range broad, if adopt the fixedly hardware discharge circuit of enlargement factor, can appear at when small-signal changed, bigger error may appear; And when bigger signal is changed, cause the saturated of A/D change-over circuit, therefore the measurement data to higher concentration and low concentration all can cause bigger error.Traditional instrument adopts the amplifying circuit of different amplification, selects different measurement gears to select corresponding amplifying circuit by control panel, reaches the purpose that improves measuring accuracy.But this kind method complicated operation is difficult for realizing automatic, continuous, on-line measurement.
For addressing the above problem, the ozone concentration tester of embodiment described in the utility model adopts the automatic gain amplifying circuit to realize the amplifier of measuring-signal.Fig. 4 shows the partial circuit structural representation of Fig. 3 embodiment control module.Described control module has photoelectric switching circuit, automatic gain amplifying circuit and the main treatment circuit that is linked in sequence, and described automatic gain amplification circuit output end connects the A/D change-over circuit in the described main treatment circuit.
Described photoelectric switching circuit is converted to faint electric signal with the light intensity signal of ultraviolet light, and this electric signal transfers to described automatic gain amplifying circuit after preliminary processing and amplifying; Main treatment circuit is adjusted the enlargement factor of described automatic gain amplifying circuit automatically according to described electric signal and predefined reference value, for described electric signal provides suitable enlargement factor and it is amplified; Electric signal after the amplification inputs to A/D change-over circuit in the described main treatment circuit and carries out the A/D conversion, and finally after main treatment circuit computing, shows by the ozone concentration value of display circuit with tested ozone gas.
Fig. 5 shows the physical circuit connection layout of automatic gain amplifying circuit among Fig. 4, and in described circuit connection diagram, the automatic gain amplifying circuit adopts programmable gain amplifier U1 to realize.The voltage signal input end VIN of described programmable gain amplifier U1 is by the measurement electrical signal J2-3 of resistance R 5 connection photoelectric switching circuits, and the voltage signal output end VFCD of described programmable gain amplifier U1 is connected the main ADC input end of handling with VSEN.After measuring the sampling of electric signal process sampling hold circuit, enter programmable gain amplifier U1, system compares sampled signal and reference voltage automatically, automatically adjust the enlargement factor of described programmable gain amplifier U1 according to result relatively, make it adapt to the requirement of ADC to input, finally, offer ADC through the signal after the described programmable gain amplifier U1 amplification and carry out the A/D conversion, thereby realize automatic, continuous, on-line measurement, improve measuring speed, the measuring accuracy of tester and measure automaticity measuring-signal.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. an ozone concentration tester comprises uviol lamp, it is characterized in that, also comprises a UVA chamber, and inside, described UVA chamber is formed with two unequal air gaps of length; Described UVA chamber also has two light mouths, and respectively corresponding one of them air gap of described each light mouth, the light that described uviol lamp sends are leaded up to the first light mouth and passed first air gap, and interstice is passed by the second light mouth in another road.
2. ozone concentration tester according to claim 1, it is characterized in that, be provided with filter unit between described uviol lamp and described UVA chamber, the light that described uviol lamp sends enters the light mouth in described UVA chamber after described filter unit filters.
3. ozone concentration tester according to claim 2 is characterized in that, described filter unit adopts optical filter to realize.
4. according to each described ozone concentration tester in the claim 1 to 3, it is characterized in that, described ozone concentration tester also comprises control module, described control module has photoelectric switching circuit, automatic gain amplifying circuit and the main treatment circuit that is linked in sequence, and described automatic gain amplification circuit output end connects the A/D change-over circuit in the described main treatment circuit.
5. ozone concentration tester according to claim 4 is characterized in that, described automatic gain amplifying circuit adopts programmable gain amplifier to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202393033U CN201517991U (en) | 2009-09-30 | 2009-09-30 | Ozone concentration tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202393033U CN201517991U (en) | 2009-09-30 | 2009-09-30 | Ozone concentration tester |
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| CN201517991U true CN201517991U (en) | 2010-06-30 |
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| CN2009202393033U Expired - Fee Related CN201517991U (en) | 2009-09-30 | 2009-09-30 | Ozone concentration tester |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523352A (en) * | 2011-12-27 | 2012-06-27 | 东莞华贝电子科技有限公司 | Mobile terminal and ozone concentration detection method |
| CN102645411A (en) * | 2011-02-22 | 2012-08-22 | 贺明志 | Ozone sensor |
| CN103105360A (en) * | 2011-11-11 | 2013-05-15 | 福建新大陆环保科技有限公司 | Ozone concentration meter capable of measuring trace concentration |
| CN104359849A (en) * | 2014-10-31 | 2015-02-18 | 苏州宏瑞净化科技有限公司 | Ozone detection sensor |
| CN106680231A (en) * | 2017-01-23 | 2017-05-17 | 淄博智普自动化科技有限公司 | Ozone concentration analyzer device with automatic zero calibration function and analysis method |
| CN106872366A (en) * | 2015-12-11 | 2017-06-20 | 新大陆科技集团有限公司 | A kind of low concentration ozone concentration detector of single light source |
| CN108169087A (en) * | 2017-12-28 | 2018-06-15 | 江苏久创电气科技有限公司 | Intelligent air detection device and system |
| CN113916821A (en) * | 2021-09-22 | 2022-01-11 | 苏州天一信德环保科技有限公司 | Ozone concentration measuring system and method for measuring ozone concentration by using same |
-
2009
- 2009-09-30 CN CN2009202393033U patent/CN201517991U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645411A (en) * | 2011-02-22 | 2012-08-22 | 贺明志 | Ozone sensor |
| CN103105360A (en) * | 2011-11-11 | 2013-05-15 | 福建新大陆环保科技有限公司 | Ozone concentration meter capable of measuring trace concentration |
| CN103105360B (en) * | 2011-11-11 | 2015-11-25 | 福建新大陆环保科技有限公司 | A kind of ozone concentration instrument surveying micro-concentrations |
| CN102523352A (en) * | 2011-12-27 | 2012-06-27 | 东莞华贝电子科技有限公司 | Mobile terminal and ozone concentration detection method |
| CN104359849A (en) * | 2014-10-31 | 2015-02-18 | 苏州宏瑞净化科技有限公司 | Ozone detection sensor |
| CN106872366A (en) * | 2015-12-11 | 2017-06-20 | 新大陆科技集团有限公司 | A kind of low concentration ozone concentration detector of single light source |
| CN106680231A (en) * | 2017-01-23 | 2017-05-17 | 淄博智普自动化科技有限公司 | Ozone concentration analyzer device with automatic zero calibration function and analysis method |
| CN106680231B (en) * | 2017-01-23 | 2023-09-29 | 山东智普测控技术有限公司 | Ozone concentration analyzer device with automatic zero calibration function and analysis method |
| CN108169087A (en) * | 2017-12-28 | 2018-06-15 | 江苏久创电气科技有限公司 | Intelligent air detection device and system |
| CN113916821A (en) * | 2021-09-22 | 2022-01-11 | 苏州天一信德环保科技有限公司 | Ozone concentration measuring system and method for measuring ozone concentration by using same |
| CN113916821B (en) * | 2021-09-22 | 2024-03-22 | 苏州天一信德环保科技有限公司 | Ozone concentration measuring system and method for measuring ozone concentration by using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 266031 No. 168, Ruichang Road, Sifang District, Shandong, Qingdao Patentee after: Qingdao Guolin Industry Co., Ltd. Address before: 266031, No. 31 Clear Lake Road, Sifang District, Shandong, Qingdao Patentee before: Qingdao Guolin Industry Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: QINGDAO LONTEC ELECTRONICS TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: QINGDAO GUOLIN INDUSTRY CO., LTD. Effective date: 20131018 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131018 Address after: 266031 No. 168, Ruichang Road, Qingdao, Shandong Patentee after: Qingdao Lontec Electronic Science & Technology Co., Ltd. Address before: 266031 No. 168, Ruichang Road, Sifang District, Shandong, Qingdao Patentee before: Qingdao Guolin Industry Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100630 Termination date: 20170930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |