CN201765188U - Excitation light source of photoelectric direct reading spectrometer - Google Patents
Excitation light source of photoelectric direct reading spectrometer Download PDFInfo
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- CN201765188U CN201765188U CN2010202228611U CN201020222861U CN201765188U CN 201765188 U CN201765188 U CN 201765188U CN 2010202228611 U CN2010202228611 U CN 2010202228611U CN 201020222861 U CN201020222861 U CN 201020222861U CN 201765188 U CN201765188 U CN 201765188U
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Abstract
The utility model provides an excitation light source of a photoelectric direct reading spectrometer, and comprises a pulse generator. The output end of the pulse generator is connected with both an ignition pulse circuit and a pulse forming network. The ignition pulse circuit is connected with an igniting plate, the output end of the pulse forming network is connected with a capacitor charging/discharging circuit, and the feedback output end of the capacitor charging/discharging circuit is connected with the input end of the pulse generator; and the capacitor charging/discharging circuit is connected with an anode plate through a tunnel diode circuit, the high voltage output end of the ignition pulse circuit is also connected with the anode plate, and the anode plate discharges to the ground. The excitation light source has the advantages that the excitation light source adopts high-tension ignition and large capacity capacitor spark discharge; the spark current and the spark peak voltage are stable; and the excitation light source eliminates the interference brought along the excitation so as to improve the stability, and is free from regulation.
Description
Technical field
The utility model relates to a kind of excitation source circuit, especially a kind of excitation source that is used for photo-electric direct reading spectrometer.
Background technology
The spark light source that early stage photo-electric direct reading spectrometer uses is a current pulser, the subject matter that this light source exists at present be light source excite repetition frequency lower, frequency has only 100Hz, and be the unidirectional pulse discharge, peak pressure can not constant voltage be controlled, the envelope pressure value of each excited sample is all different, thereby causes the problems such as poor repeatability of spectrometer.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of photo-electric direct reading spectrometer excitation source, high-frequency and high-voltage, working stability.
The technical scheme that provides according to the utility model, described photo-electric direct reading spectrometer excitation source comprises: pulse producer, the output terminal of pulse producer connects igniting pulsing circuit and pulse forming network respectively, described firing pulse circuit is connected with igniting plate, the output terminal of described pulse forming network connects capacitor charge and discharge circuit, and the feedback output end of capacitor charge and discharge circuit connects the input end of pulse producer; Capacitor charge and discharge circuit connects positive plate by tunnel diode circuit, and the high-voltage output end of firing pulse circuit also is connected to positive plate, and positive plate discharges over the ground.
Described pulse forming network comprises: be connected the compressing tablet resistance between the pulse producer pulse output positive and negative terminal, transistor gate is connected with the pulse output plus terminal, transistor source is connected with pulse output negative terminal, be connected with the 3rd diode and the 5th electric capacity between transistor drain and the source electrode, transistor drain connects the positive input terminal of capacitor charge and discharge circuit.
Described capacitor charge and discharge circuit comprises: the 7th diode that is connected with the positive input terminal forward, be connected the electric capacity that is used to discharge and recharge between the negative electrode of the 7th diode and the ground, and being connected with the resistance and the relay switch of series connection, the negative electrode of the 7th diode is as feedback output end simultaneously.
The utility model has the advantages that:
1, this light source is 200/400 hertz of conversion of high repetition frequency, can satisfy the sample needs of analyzing various materials;
2, the large bulk capacitance spark discharge is adopted in 15000V high-tension ignition;
3, spark current and spark peak pressure are constant, can regulate automatically, and the index peak pressure is 300V, and electric current is 125A;
4, to adopt tungsten electrode to disturb big for the auxiliary electrode principle of high-tension ignition, and poor stability makes measuring system and the computing machine can't operate as normal.This light source has been cancelled the excitation mode of tungsten electrode, has adopted tunnel diode circuit, has solved the interference that brings in the excitation process, has improved stability, exempts to regulate.
Description of drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1: the photo-electric direct reading spectrometer excitation source, it is characterized in that: comprise pulse producer, the output terminal of pulse producer connects igniting pulsing circuit and pulse forming network (being called for short PFN) respectively, described firing pulse circuit is connected with igniting plate, the output terminal of described pulse forming network connects capacitor charge and discharge circuit, and the feedback output end of capacitor charge and discharge circuit connects the input end of pulse producer; Capacitor charge and discharge circuit connects positive plate by tunnel diode circuit, and the high-voltage output end of firing pulse circuit also is connected to positive plate, and positive plate discharges over the ground.The effect of firing pulse circuit is to produce the 15KV high pressure to be added to analytical gap on the sample stage, produces ionization and form pipeline, firing pulse spark discharge under the controlled atmospher of argon gas.Realize the purpose of evaporation and excited sample.
As shown in Figure 2, described pulse forming network comprises: be connected the compressing tablet resistance D11 between pulse producer pulse output positive and negative terminal P/J2-2, the P/J2-3, transistor Q3 grid is connected with pulse output plus terminal P/J2-2, transistor Q3 source electrode is connected with pulse output negative terminal P/J2-3, be connected with the 3rd diode D3 and the 5th capacitor C 5 between transistor Q3 drain electrode and the source electrode, transistor Q3 drain electrode connects the positive input terminal of capacitor charge and discharge circuit.
Described capacitor charge and discharge circuit comprises: the 7th diode D7 that is connected with the positive input terminal forward, be connected capacitor C 3, C7, the C2 that is used to discharge and recharge between the negative electrode of the 7th diode D7 and the ground, and be connected with the resistance and relay K 1 contact 5 ', 6 ' of series connection, the negative electrode of the 7th diode D7 connects the input end P/J2-4 of pulse producer as feedback output end simultaneously.
Pulse producer is a timing signal plate Q14, and spark pulse detection signal Vsense (feedback signal) introduces from the P/J2-4 end, is added to the transistor base of timing signal plate Q14.PFN spark discharge peak value of pulse is stabilized in 300VDC.
The process of the stable control of spark pulse:
When the output spark pulse was lower than 300VDC, the Vsense signal was on the low side, can not make the transistor turns of Q14, and transistor ends, and realizes normal PFN CHARGE charging pulse.When the output spark pulse is higher than 300VDC, the higher transistor turns that forces of Vsense signal, this moment, the timing signal plate can not send the PFNCHARGE charging pulse, and the electric capacity of capacitor charge and discharge circuit can not charge.The electric capacity charging voltage reduces.When spark pulse voltage was equal to or less than 300VDC, the Vsense signal did not make the transistor of Q14 end, and PFN CHARGE signal recovers, and electric capacity continues charging.The peak value of spark pulse raises again.When greater than 300VDC, limiting capacitance charging again.Repeat to use the Vsense detection signal like this, regulate the 300VDC peak value of spark pulse automatically, make the stable output spark pulse electric current of this light source energy.
Claims (3)
1. photo-electric direct reading spectrometer excitation source, it is characterized in that: comprise pulse producer, the output terminal of pulse producer connects igniting pulsing circuit and pulse forming network respectively, described firing pulse circuit is connected with igniting plate, the output terminal of described pulse forming network connects capacitor charge and discharge circuit, and the feedback output end of capacitor charge and discharge circuit connects the input end of pulse producer; Capacitor charge and discharge circuit connects positive plate by tunnel diode circuit, and the high-voltage output end of firing pulse circuit also is connected to positive plate, and positive plate discharges over the ground.
2. photo-electric direct reading spectrometer excitation source as claimed in claim 1, it is characterized in that described pulse forming network comprises: be connected the compressing tablet resistance between the pulse producer pulse output positive and negative terminal, transistor gate is connected with the pulse output plus terminal, transistor source is connected with pulse output negative terminal, be connected with the 3rd diode and the 5th electric capacity between transistor drain and the source electrode, transistor drain connects the positive input terminal of capacitor charge and discharge circuit.
3. photo-electric direct reading spectrometer excitation source as claimed in claim 1, it is characterized in that described capacitor charge and discharge circuit comprises: the 7th diode that is connected with the positive input terminal forward, be connected the electric capacity that is used to discharge and recharge between the negative electrode of the 7th diode and the ground, and being connected with the resistance and the relay switch of series connection, the negative electrode of the 7th diode is as feedback output end simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202228611U CN201765188U (en) | 2010-10-20 | 2010-10-20 | Excitation light source of photoelectric direct reading spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202228611U CN201765188U (en) | 2010-10-20 | 2010-10-20 | Excitation light source of photoelectric direct reading spectrometer |
Publications (1)
| Publication Number | Publication Date |
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| CN201765188U true CN201765188U (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202228611U Expired - Fee Related CN201765188U (en) | 2010-10-20 | 2010-10-20 | Excitation light source of photoelectric direct reading spectrometer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023153A (en) * | 2010-10-20 | 2011-04-20 | 无锡市金义博仪器科技有限公司 | Photoelectric direct-reading spectrometer excitation light source |
| CN103968941A (en) * | 2014-05-22 | 2014-08-06 | 江苏鑫知源仪器有限公司 | Photoelectric direct reading spectrometer spark light source |
| CN104280380A (en) * | 2014-10-24 | 2015-01-14 | 合肥卓越分析仪器有限责任公司 | Spark excitation light source of photoelectric direct-reading spectrograph |
| CN109738416A (en) * | 2018-12-29 | 2019-05-10 | 上海一谱仪器科技股份有限公司 | A kind of spectrometer measurement data analysis management system based on big data |
-
2010
- 2010-10-20 CN CN2010202228611U patent/CN201765188U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023153A (en) * | 2010-10-20 | 2011-04-20 | 无锡市金义博仪器科技有限公司 | Photoelectric direct-reading spectrometer excitation light source |
| CN102023153B (en) * | 2010-10-20 | 2011-12-28 | 无锡市金义博仪器科技有限公司 | Photoelectric direct-reading spectrometer excitation light source |
| CN103968941A (en) * | 2014-05-22 | 2014-08-06 | 江苏鑫知源仪器有限公司 | Photoelectric direct reading spectrometer spark light source |
| CN104280380A (en) * | 2014-10-24 | 2015-01-14 | 合肥卓越分析仪器有限责任公司 | Spark excitation light source of photoelectric direct-reading spectrograph |
| CN109738416A (en) * | 2018-12-29 | 2019-05-10 | 上海一谱仪器科技股份有限公司 | A kind of spectrometer measurement data analysis management system based on big data |
| CN109738416B (en) * | 2018-12-29 | 2021-05-28 | 上海一谱仪器科技股份有限公司 | Spectrometer measurement data analysis management system based on big data |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20131020 |