CN102023153A - Photoelectric direct-reading spectrometer excitation light source - Google Patents
Photoelectric direct-reading spectrometer excitation light source Download PDFInfo
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- CN102023153A CN102023153A CN 201010196736 CN201010196736A CN102023153A CN 102023153 A CN102023153 A CN 102023153A CN 201010196736 CN201010196736 CN 201010196736 CN 201010196736 A CN201010196736 A CN 201010196736A CN 102023153 A CN102023153 A CN 102023153A
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Abstract
The invention provides a photoelectric direct-reading spectrometer excitation light source, which comprises a pulse generator, wherein the output end of the pulse generator is connected with an ignition pulse circuit and a pulse forming network respectively, the ignition pulse circuit is connected with an ignition plate, the output end of the pulse forming network is connected with a capacitor charge/discharge circuit, and the feedback output end of the capacitor charge/discharge circuit is connected with the input end of the pulse generator; and the capacitor charge/discharge 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 photoelectric direct-reading spectrometer excitation light source has the advantages that: high-pressure ignition is adopted, and high-capacity capacitor spark discharge is adopted; spark current and spark peak pressure are constant; and interference in the excitation process is solved, the stability is improved, and adjustment is free.
Description
Technical field
The present invention 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 objective of the invention is to overcome the deficiencies in the prior art, provide a kind of photo-electric direct reading spectrometer excitation source, high-frequency and high-voltage, working stability.
According to technical scheme provided by the invention, 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.
Advantage of the present invention is:
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 a circuit block diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
The invention will be further described 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 |
|---|---|---|---|
| CN2010101967362A CN102023153B (en) | 2010-10-20 | 2010-10-20 | Photoelectric direct-reading spectrometer excitation light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101967362A CN102023153B (en) | 2010-10-20 | 2010-10-20 | Photoelectric direct-reading spectrometer excitation light source |
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| CN102023153A true CN102023153A (en) | 2011-04-20 |
| CN102023153B CN102023153B (en) | 2011-12-28 |
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| CN2010101967362A Expired - Fee Related CN102023153B (en) | 2010-10-20 | 2010-10-20 | Photoelectric direct-reading spectrometer excitation light source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872444A (en) * | 2017-03-07 | 2017-06-20 | 昆山书豪仪器科技有限公司 | A kind of digital control type spark power supply |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD155276A1 (en) * | 1980-12-15 | 1982-05-26 | Norbert Blacha | CIRCUIT ARRANGEMENT FOR THE PROTECTION OF SEMICONDUCTOR CHANGERS |
| US4641968A (en) * | 1984-12-17 | 1987-02-10 | Baird Corporation | Mobile spectrometric apparatus |
| US4996967A (en) * | 1989-11-21 | 1991-03-05 | Cummins Engine Company, Inc. | Apparatus and method for generating a highly conductive channel for the flow of plasma current |
| CN2529489Y (en) * | 2002-01-31 | 2003-01-01 | 广州市杜普有限公司 | High-frequency pulse light generator |
| CN201765188U (en) * | 2010-10-20 | 2011-03-16 | 无锡市金义博仪器科技有限公司 | Excitation light source of photoelectric direct reading spectrometer |
-
2010
- 2010-10-20 CN CN2010101967362A patent/CN102023153B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD155276A1 (en) * | 1980-12-15 | 1982-05-26 | Norbert Blacha | CIRCUIT ARRANGEMENT FOR THE PROTECTION OF SEMICONDUCTOR CHANGERS |
| US4641968A (en) * | 1984-12-17 | 1987-02-10 | Baird Corporation | Mobile spectrometric apparatus |
| US4996967A (en) * | 1989-11-21 | 1991-03-05 | Cummins Engine Company, Inc. | Apparatus and method for generating a highly conductive channel for the flow of plasma current |
| CN2529489Y (en) * | 2002-01-31 | 2003-01-01 | 广州市杜普有限公司 | High-frequency pulse light generator |
| CN201765188U (en) * | 2010-10-20 | 2011-03-16 | 无锡市金义博仪器科技有限公司 | Excitation light source of photoelectric direct reading spectrometer |
Non-Patent Citations (1)
| Title |
|---|
| 《岩矿测试》 20051231 岳所祥 WLD - 4C型光电直读光谱仪的开发与应用 第24卷, 第4期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872444A (en) * | 2017-03-07 | 2017-06-20 | 昆山书豪仪器科技有限公司 | A kind of digital control type spark power supply |
| CN106872444B (en) * | 2017-03-07 | 2024-03-29 | 昆山书豪仪器科技有限公司 | Numerical control spark power supply |
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| CN102023153B (en) | 2011-12-28 |
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Denomination of invention: Photoelectric direct-reading spectrometer excitation light source Effective date of registration: 20131021 Granted publication date: 20111228 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi science and Technology Branch Pledgor: Wuxi Jinyibo Instrument Technology Co., Ltd. Registration number: 2013990000764 |
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Date of cancellation: 20161124 Granted publication date: 20111228 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi science and Technology Branch Pledgor: Wuxi Jinyibo Instrument Technology Co., Ltd. Registration number: 2013990000764 |
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Granted publication date: 20111228 Termination date: 20161020 |