CN203941101U - A kind of control system of difference gas analyzer - Google Patents
A kind of control system of difference gas analyzer Download PDFInfo
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- CN203941101U CN203941101U CN201420334625.7U CN201420334625U CN203941101U CN 203941101 U CN203941101 U CN 203941101U CN 201420334625 U CN201420334625 U CN 201420334625U CN 203941101 U CN203941101 U CN 203941101U
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Abstract
A control system for difference gas analyzer, it comprises: light source, export to air chamber for launching detection light; Air chamber, is electrically connected with light source, is filled with gas to be detected; Spectrometer, is electrically connected with air chamber, for detecting the gas concentration in air chamber according to the light intensity of injecting light source; Feed circuit, are electrically connected with light source, with to light source power supply; Power regulation circuit, is electrically connected with spectrometer and feed circuit, for judging the watt level of light source according to the light intensity of spectrometer output, and by feed circuit, its power is regulated.Mainly for xenon lamp weak situation of light after long-term use, improve resolution and the precision of light intensity, detection, change and make FEEDBACK CONTROL by the light intensity of monitoring spectrometer, adjust the power of the feed circuit of controlling light source, strengthen power, improve detection resolution and precision, without dismounting analyser, reduce the loaded down with trivial details operation of opening machinery debugging, can dynamic adjustments power, make to export constant.
Description
Technical field
The utility model relates to control system, refers in particular to a kind of control system of difference gas analyzer.
Background technology
The principle of ultraviolet difference gas analyzer is to have the characteristic that light selecting performance is absorbed at ultraviolet band according to gas, according to langbobier law, is finally inversed by the concentration of each gas.The scope that xenon lamp is emitted in ultraviolet band is wide, and the life-span is very long, so ultraviolet difference gas analyzer generally selects pulse xenon lamp as light source.Meanwhile, ultraviolet difference gas analyzer uses spectrometer as optoelectronic induction device, the light that light source sends, and through air chamber, optical fiber, is received by spectrometer, and is converted into electric signal, and software collection electric signal, as calculating one of input parameter of gas concentration.The power of electric signal is directly to be determined by the power of xenon lamp, and power is larger, and electric signal is stronger.Use after a period of time at xenon lamp, aging due to xenon lamp, or optical fiber is aging, and light intensity dies down, and can not meet best measurement requirement, need to adjust the power of xenon lamp.Traditional way is to take analyser apart, use instrument rotates xenon lamp power regulating knob, observes after output signal meets the requirements and installs analyser again, the time-consuming trouble again of this method, and when Modulating Power, may have influence on optical fiber, and then have influence on the light intensity that spectrometer receives.
Utility model content
Based on the deficiencies in the prior art, fundamental purpose of the present utility model is to provide a kind of control system that can detect and automatically adjust the difference gas analyzer of the power input of light source.
The utility model provides a kind of control system of difference gas analyzer, and it comprises:
Light source, exports to air chamber for launching detection light;
Air chamber, is electrically connected with light source, is filled with gas to be detected;
Spectrometer, is electrically connected with air chamber, for detecting the gas concentration in air chamber according to the light intensity of injecting light source;
Feed circuit, are electrically connected with light source, with to light source power supply;
Power regulation circuit, is electrically connected with spectrometer and feed circuit, for judging the watt level of light source according to the light intensity of spectrometer output, and by feed circuit, its power is regulated.
Wherein, described power regulation circuit comprises:
Signal acquisition module, the light of launching for receiving spectrum instrument;
Power detection module, is electrically connected with signal acquisition module, for detection of the power of the emitted light of spectrometer;
Power comparing module, is electrically connected with power detection module, for the performance number of gathered light is compared with established standards value, and output power comparison result;
Power regulation module, is electrically connected with power comparing module, for according to power comparison result Modulating Power size, and adjusts in real time the output power of feed circuit.
In power comparison result, if detection power is higher than setting peak power value, drive feed circuit to lower the performance number of light source by power regulation module; If detection power, lower than setting lowest power value, drives feed circuit to raise the performance number of light source by power regulation module.In power comparing module, setting peak power value is 5W; Lowest power value is 3W.
Preferably, described power regulation circuit also comprises: photoelectric conversion module, is connected between signal acquisition module and power detection module, for light signal that signal acquisition module gathers is converted to electric signal.
Wherein, between described light source and air chamber, be connected by optical fiber, between described air chamber and spectrometer, be also connected by optical fiber.Described light source is xenon lamp, and described detection light is ultraviolet light.
Compared with prior art, the control system of a kind of difference gas analyzer of the utility model, power detection and Circuit tuning are added, mainly for xenon lamp weak situation of light after long-term use, the impact of the systematic error that has reduced spectrometer itself on testing result, improve light intensity, improve the resolution and the precision that detect, change and make FEEDBACK CONTROL by the light intensity of Real-Time Monitoring spectrometer, adopt the power of artificially or automatically adjusting the feed circuit of control light source, strengthen power, improve light intensity, improve detection resolution and precision, without dismounting analyser, reduce the loaded down with trivial details operation of opening machinery debugging, and prevent from repeatedly starting shooting spectrometer is produced to systematic error, can not have influence on other parts of analyser, and can not have influence on the fiber position in analyser, can dynamic adjustments power, make to export constant.
Brief description of the drawings
Fig. 1 is the integrated circuit figure of the control system of a kind of difference gas analyzer of the utility model;
Fig. 2 is embodiment mono-circuit diagram of power regulation circuit in the control system of a kind of difference gas analyzer of the utility model;
Fig. 3 is embodiment bis-circuit diagrams of power regulation circuit in the control system of a kind of difference gas analyzer of the utility model.
Embodiment
In order to adjust quickly and easily the power input of the light source in difference gas analyzer, shown in Fig. 1, the utility model provides a kind of control system of difference gas analyzer, and it comprises:
Light source 1, exports to air chamber for launching detection light, and described light source can be selected xenon lamp, and described detection light can be ultraviolet light;
Air chamber 2, is electrically connected with light source 1, is filled with gas to be detected;
Spectrometer 3, is electrically connected with air chamber 2, for detecting the gas concentration in air chamber 2 according to the light intensity of injecting light source 1;
Feed circuit 4, are electrically connected with light source 1, to power to light source 1;
Power regulation circuit 5, is electrically connected with spectrometer 3 and feed circuit 4, judges the watt level of light source 1, and by feed circuit 4, its power is regulated for the light intensity of exporting according to spectrometer 3.
Wherein, shown in Fig. 2, in embodiment mono-, described power regulation circuit 5 comprises:
Signal acquisition module 50, the light of launching for receiving spectrum instrument 3;
Power detection module 51, is electrically connected with signal acquisition module 50, for detection of the power of the emitted light of spectrometer 3;
Power comparing module 52, is electrically connected with power detection module 51, for the performance number of gathered light is compared with established standards value, and output power comparison result;
Power regulation module 53, is electrically connected with power comparing module 52, for according to power comparison result Modulating Power size, and adjusts in real time the output power of feed circuit 4.
In power comparison result, if detection power is higher than setting peak power value, drive feed circuit 4 to lower the performance number of light source by power regulation module; If detection power, lower than setting lowest power value, drives feed circuit 4 to raise the performance number of light source by power regulation module.In power comparing module 52, setting peak power value is 5W; Lowest power value is 3W.
Shown in Fig. 3, in embodiment bis-, described power regulation circuit 5 also comprises: photoelectric conversion module 54, is connected between signal acquisition module 50 and power detection module 51, for signal acquisition module 50 light signal that gathers is converted to electric signal.
Wherein, between described light source 1 and air chamber 2, be connected by optical fiber, between described air chamber 2 and spectrometer 3, be also connected by optical fiber.
In the present invention, gather the intensity of the detection light penetrating in spectrometer 3 by signal acquisition module 50, light signal is converted to electric signal, in power comparing module 52, power signal to be measured is compared with the standard value of setting, carry out negative feedback control, detect, compare according to the power of the light electric signal to current mensuration, Real-time Feedback, generate regulation and control instruction, the power of feed circuit 4 is regulated, thus the brightness of adjusting light source 1.If the output intensity of spectrometer 3 is higher, need suitably to turn down the power input of light source, usually, mainly for the weak situation of light, due to the systematic error of spectrometer itself, make the detection resolution of light intensity lower, make the accuracy of detection of gas concentration low, light intensity need to be improved, the resolution and the precision that detect could be improved.Therefore, after the long-term use of light source xenon lamp, occur aging, the light intensity of normal output hour, change and make FEEDBACK CONTROL by the light intensity of Real-Time Monitoring spectrometer, by artificially or automatically adjusting the power of the feed circuit of control light source, strengthen power, improve light intensity, improve detection resolution and precision.
The utility model also provides a kind of Poewr control method of difference gas analyzer, and it comprises the following steps:
Step 1) feed circuit driving light source transmitting detection light;
Step 2) the gassiness air chamber of detection light penetration that sends of light source;
Step 3) spectrometer according to survey and detect the intensity level of light and calculate the gas concentration value in air chamber;
Step 4) by power detection module, the light intensity of spectrometer output is detected, to adjust in real time the performance number of feed circuit.
Wherein, in step 4) in further comprising the steps:
Step 41) in power regulation module, the light that signal acquisition module receiving spectrum instrument is exported;
Step 42) detect the power of the light of spectrometer by power detection module;
Step 43) institute's detection power is compared with calibration power, output power comparison result;
Step 44) power regulation module adjusts the power input of feed circuit according to power comparison result:
If detection power during lower than peak power value, is heightened the power input of feed circuit;
If detection power during higher than lowest power value, is turned down the power input of feed circuit.
In step 3) in further comprising the steps:
Step 31) detect the light intensity value of air chamber under vacuum state by spectrometer;
Step 32) detect the light intensity value of the air chamber after blanketing gas by spectrometer;
Step 33) difference that the light intensity value under the light intensity value after blanketing gas and vacuum state is subtracted each other obtains the intensity level of current light.
Above embodiment has been described in detail the utility model, but these not form restriction of the present utility model.Protection domain of the present utility model is not limited with above-mentioned embodiment, as long as the equivalence that those of ordinary skill in the art do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of recording in claims.
Claims (7)
1. a control system for difference gas analyzer, is characterized in that comprising:
Light source, exports to air chamber for launching detection light;
Air chamber, is electrically connected with light source, is filled with gas to be detected;
Spectrometer, is electrically connected with air chamber, for detecting the gas concentration in air chamber according to the light intensity of injecting light source;
Feed circuit, are electrically connected with light source, with to light source power supply;
Power regulation circuit, is electrically connected with spectrometer and feed circuit, for judging the watt level of light source according to the light intensity of spectrometer output, and by feed circuit, its power is regulated.
2. the control system of difference gas analyzer according to claim 1, is characterized in that: described power regulation circuit comprises:
Signal acquisition module, the light of launching for receiving spectrum instrument;
Power detection module, is electrically connected with signal acquisition module, for detection of the power of the emitted light of spectrometer;
Power comparing module, is electrically connected with power detection module, for the performance number of gathered light is compared with established standards value, and output power comparison result;
Power regulation module, is electrically connected with power comparing module, for according to power comparison result Modulating Power size, and adjusts in real time the output power of feed circuit.
3. the control system of difference gas analyzer according to claim 2, it is characterized in that: described power regulation circuit also comprises: photoelectric conversion module, be connected between signal acquisition module and power detection module, for light signal that signal acquisition module gathers is converted to electric signal.
4. the control system of difference gas analyzer according to claim 3, is characterized in that: in power comparison result, if detection power is higher than setting peak power value, drive feed circuit to lower the performance number of light source by power regulation module; If detection power, lower than setting lowest power value, drives feed circuit to raise the performance number of light source by power regulation module.
5. the control system of difference gas analyzer according to claim 4, is characterized in that: in power comparing module, setting peak power value is 5W; Lowest power value is 3W.
6. the control system of difference gas analyzer according to claim 2, is characterized in that: between described light source and air chamber, be connected by optical fiber, between described air chamber and spectrometer, be also connected by optical fiber.
7. the control system of difference gas analyzer according to claim 1, is characterized in that: described light source is xenon lamp, and described detection light is ultraviolet light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334625.7U CN203941101U (en) | 2014-06-20 | 2014-06-20 | A kind of control system of difference gas analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420334625.7U CN203941101U (en) | 2014-06-20 | 2014-06-20 | A kind of control system of difference gas analyzer |
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| CN203941101U true CN203941101U (en) | 2014-11-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222892B (en) * | 2015-11-04 | 2017-05-31 | 中国电子科技集团公司第四十一研究所 | A kind of wavelength scaling method of ultraviolet spectrometer |
| CN107911929A (en) * | 2017-12-21 | 2018-04-13 | 苏州汉策能源设备有限公司 | A kind of autocontrol method and device of xenon source constant intensity |
-
2014
- 2014-06-20 CN CN201420334625.7U patent/CN203941101U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222892B (en) * | 2015-11-04 | 2017-05-31 | 中国电子科技集团公司第四十一研究所 | A kind of wavelength scaling method of ultraviolet spectrometer |
| CN107911929A (en) * | 2017-12-21 | 2018-04-13 | 苏州汉策能源设备有限公司 | A kind of autocontrol method and device of xenon source constant intensity |
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Address after: 518100 Room 301, building 2, runheng Industrial Zone, No. 1, Liuxian Third Road, Xingdong community, Xin'an street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Bixing IOT Technology (Shenzhen) Co.,Ltd. Address before: 518000 4th floor, building 4, Antongda Industrial Park, No.1 Liuxian Avenue, Baoan 68 District, Shenzhen City, Guangdong Province Patentee before: ZTE INSTRUMENTS (SHENZHEN) Co.,Ltd. |