CN103968941A - Photoelectric direct reading spectrometer spark light source - Google Patents
Photoelectric direct reading spectrometer spark light source Download PDFInfo
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- CN103968941A CN103968941A CN201410219817.8A CN201410219817A CN103968941A CN 103968941 A CN103968941 A CN 103968941A CN 201410219817 A CN201410219817 A CN 201410219817A CN 103968941 A CN103968941 A CN 103968941A
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- light source
- pulse
- direct reading
- reading spectrometer
- transformer
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Abstract
The invention discloses a photoelectric direct reading spectrometer spark light source. The spark light source comprises alternating current input and a transformer. The spark light source is characterized in that the alternating current input is connected with the transformer, output voltage of the transformer is directly loaded to a timing signal control board, the output voltage of transformer is added to a power board through a light source starting relay and a delay solid relay to generate direct current high voltage, and the direct current high voltage output by the power board is used for capacitor charging of a pulse shaping network and an ignition circuit. The timing signal control board outputs a charging control pulse to the pulse shaping network and outputs a charging control pulse and an ignition triggering pulse to the ignition circuit. The ignition circuit generates a high voltage ignition pulse which is added into an analytical gasp between a sample and a tungsten electrode through an auxiliary gap. The photoelectric direct reading spectrometer spark light source is simple in structure and has high repetition frequency currents, and spectral interference and the matrix effect are greatly reduced.
Description
Technical field
The present invention relates to spark light source, particularly relate to a kind of photo-electric direct reading spectrometer spark light source.
Background technology
Current photo-electric direct reading spectrometer spark light source, there are following two problems: 1, repetition frequency low (100 weeks/S), 2, the peak value of current impulse cannot regulate automatically, in the time of analytic sample, there is so the poor problem of repeatable accuracy, greatly affected the accuracy of analyzing, it is very inconvenient to use.
Summary of the invention
In order to solve the problems of the prior art, the invention provides one simple in structure, there is high repetition frequency electric current, spectrum disturbs the photo-electric direct reading spectrometer spark light source greatly reducing with matrix effect.
In order to address the above problem, the technical solution used in the present invention is:
A kind of photo-electric direct reading spectrometer spark light source, comprise alternating current input and transformer, it is characterized in that: also comprise light source starting relay, band postpones solid-state relay, timing signal control panel, power amplifier board, pulse forming network and firing circuit, described alternating current input is connected with transformer, described transformer output voltage is directly loaded on timing signal control panel, described transformer output voltage postpones solid-state relay through light source starting relay and band and is added to and on power amplifier board, produces high direct voltage, the DC high-voltage of described power amplifier board output is supplied with respectively the capacitor charging of pulse forming network and firing circuit, described timing signal control panel is to pulse forming network output charging gating pulse, described timing signal control panel is to firing circuit output charging gating pulse and igniting trigger pulse, described firing circuit produces high tension ignition pulse and is added to the analytical gap between sample and tungsten electrode through auxiliary gap.
Aforesaid a kind of photo-electric direct reading spectrometer spark light source, is characterized in that: also comprise light source control plate, described light source control plate control light source starting relay and band postpone the break-make of solid-state relay
Aforesaid a kind of photo-electric direct reading spectrometer spark light source, is characterized in that: also comprise damper diode plate, be provided with and play the high damper diode plate obstructing of high tension ignition pulse between pulse forming network and auxiliary gap.
Aforesaid a kind of photo-electric direct reading spectrometer spark light source, is characterized in that: described firing circuit charging current is controlled by a contact of light source starting relay.
Aforesaid a kind of photo-electric direct reading spectrometer spark light source, is characterized in that: described auxiliary gap is 5 millimeters, and described analytical gap is 4 millimeters.
Aforesaid a kind of photo-electric direct reading spectrometer spark light source, is characterized in that: described analytical gap is surrounded by argon gas controlled atmospher.
The invention has the beneficial effects as follows: photo-electric direct reading spectrometer spark light source of the present invention comprises a pre-burning stage pre-service with high-energy discharge as sample analysis.Cause the interference of spectrum element and matrix effect to reduce in a large number owing to thering is this feature, thereby analysis precision is improved widely.Spark light source of the present invention is a kind of high repetition frequency electric current-pulse producer, has replaced original spectroanalysis instrument KH-3/5 light source, makes, in spectroanalysis instrument performance, fundamental change occurs.
Brief description of the drawings
Fig. 1 is photo-electric direct reading spectrometer spark light source structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, photo-electric direct reading spectrometer spark light source of the present invention: the maximum 6A of light source input ac voltage: 110VAC; The maximum 3A of 220VAC.Involve power switch by supply socket through linear Shanghai and enter the input end of T1 transformer.T1 transformer is made up of two groups of 110VAC input ends.Freely carry out and meet (110VAC) or be connected in series (220VAC) according to alternating voltage that user uses.
The 110VAC of T1 transformer output is directly added to timing signal control panel (SCBD), and 290VAC exports through light source starting relay K1 and is with delay solid-state relay K4 to control and is added to power amplifier board (PWBD) generation 400VDC voltage for light source.
First 400VDC voltage supply pulse forming network (PFN) to charging capacitor charging, and for firing circuit (IGN), charging capacitor is charged.The charging of pulse forming network and firing circuit charging capacitor produces repetition frequency (400HZ/200HZ) PFN charging pulse and the control of IGN charging pulse by timing signal control panel.Firing circuit (IGN) charging current is controlled by contact of light source starting relay K1.In the time that pulse forming network charging capacitor reaches specified 300VDC and firing circuit charging capacitor and reaches 400VDC, on timing signal control panel, send again an IGN igniting trigger pulse.IGN igniting trigger pulse makes controlled silicon conducting on firing circuit.Allow the 400VDC of charging capacitor discharge through controllable silicon.Unidirectional 400HZ/200HZ firing pulse is directly added to the elementary of high-tension transformer, at the high tension ignition pulse of the secondary generation 15KV of high-tension transformer.15KV high tension ignition pulse is added to the analytical gap (auxiliary gap is 5 millimeters, and analytical gap is 4 millimeters) between sample and tungsten electrode through auxiliary gap.Because analytical gap effluve is surrounded (purity of argon must more than 99.996%) by argon gas controlled atmospher, present a low impedance state.The passage of an electric discharge is provided to the charging capacitor of having stored high energy (300VDC) in pulse forming network like this.Result forms the spark of an evaporation and excited sample between sample and tungsten electrode.
Photo-electric direct reading spectrometer is divided into three phases: flushing, pre-burning and exposure.Light source is only activated and works in pre-burning and exposure stage.
Light source course of action:
1, when the routine analyzer of spectrometer is activated, first spectrometer interface section is sent light source enabling signal and is added to light source.Now light source inner light source starting relay K1 makes an immediate response, K1 Control:
1. the bypass resistance R1(1.5 Europe of 400VDC Shanghai ripple capacitor discharge) disconnect.
2. the bypass resistance R7/R14(5K Europe of PFN charging capacitor electric discharge) disconnect.
3. the 290VAC of T1 level output is switched to and postpones one end that K4 left by solid-state relay.
4. the 110VAC of T1 level output is added on the control panel of light source.
5. the charging voltage of IGN firing circuit is switched on (R5+R6).
After light source starting relay K1 is activated, light source is in waiting status.
2, the pre-burning control stage
Spectrometer pre-burning control signal is added on the control panel of light source, K1(110VDC relay on control panel) action,
And postpone 400ms output 15VDC and be added on K4-solid-state relay, the 290VAC exporting from T1 is like this through light source starting relay K1, and delay solid-state relay is opened K4 and is added to power amplifier board PWBD generation 400VDC light source works DC voltage.
On timing signal plate, send three gating pulse:
1. PFN charging gating pulse
2. IGN charging gating pulse
Above two signals produce in positive half period.When PFN and IGN circuit charging capacitor charging voltage PFN reach 300VDC, IGN circuit reaches 400VDC.Timing signal plate sends an IGN trigger pulse at the negative half period of PFN and IGN charging gating pulse.
3. IGN triggers silicon controlled rectifier pulse
On firing circuit, controllable silicon is triggered.Charging capacitor electric discharge generation+15KV high-voltage pulse on high-tension transformer, this high-voltage pulse is at auxiliary gap and sample analysis gap discharge.Sample gap discharge forms Low ESR, and the high energy of having stored to PFN charging capacitor like this provides the path of an electric discharge.Between results sample and tungsten electrode, form the spark of an evaporation and excited sample.Be 100A at the peak value of pre-burning interval current impulse, sample surfaces is carried out to pre-service.
3, the exposure control stage
The pre-burning stage finishes, and light source enabling signal still retains, and K1 still moves.Because pre-burning control signal disappears, K4 is solid-state to continue
Electrical equipment cuts out.Spectrometer operation proceeds to exposure stage.Exposure control signal sends through interface and is added to the control panel of light source from spectrometer, K2(110VDC on control panel) action, K3(24VDC) action, K3 postpones first to send exposure relay K3(EXP after 200ms) control signal of action is 110VAC.
K3(EXP) effect:
1. disconnect PFN charging capacitor C2(6 μ f), the peak value that reduces current impulse reduces to 35A from 100A.
2. disconnect inductance L 2(35uh) the short circuit point at two ends, make inductance L 2 seal in PFN discharge path, make current impulse forward position emptier.Improve the quality of spark discharge.
Deng K3(EXP) actuating of relay finishes, and on control panel, K2 relay postpones to send 15VDC control level after 400ms and is again added to the control end of K4 solid-state relay.Form again the spark discharge in sample analysis gap.
Spectrometer analysis program makes measuring unit carry out data acquisition to the light intensity value of sample all elements simultaneously.So just complete the operation of a sample analysis.
The repetition frequency of light source charging and discharging can be selected 400HZ and 200HZ.No matter all can select 400HZ and 200HZ in pre-burning and exposure stage, this requires user to determine according to difference analysis material.The length of light source pre-burning and time shutter, user can choose best pre-burning parameter and exposure parameter (the upper explanation of customer parameter " light source maintenance and maintenance technology ") according to the requirement of analyzing material.
The Main Function of a PFN discharge loop unidirectional damping diode panel of serial connection (DBD) of light source: if do not add damper diode plate during PFN electric discharge forms spark, firing circuit+15KV seals in PFN loop and will burn out PFN circuit, due to a damper diode plate of serial connection, in the time that firing pulse sends 15KV voltage, there is a high impedance status in PFN major loop.Stop any high pressure of playing a reversed role to be added to PFN circuit.Damper diode plate is forward low impedance state to PFN charging capacitor discharge path.If diode open-circuit will affect the peak value of PFN discharge pulse on damper diode.Significantly affect the state of sample excitation.
More than show and described ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. a photo-electric direct reading spectrometer spark light source, comprise alternating current input and transformer, it is characterized in that: also comprise light source starting relay, band postpones solid-state relay, timing signal control panel, power amplifier board, pulse forming network and firing circuit, described alternating current input is connected with transformer, described transformer output voltage is directly loaded on timing signal control panel, described transformer output voltage postpones solid-state relay through light source starting relay and band and is added to and on power amplifier board, produces high direct voltage, the DC high-voltage of described power amplifier board output is supplied with respectively the capacitor charging of pulse forming network and firing circuit, described timing signal control panel is to pulse forming network output charging gating pulse, described timing signal control panel is to firing circuit output charging gating pulse and igniting trigger pulse, described firing circuit produces high tension ignition pulse and is added to the analytical gap between sample and tungsten electrode through auxiliary gap.
2. a kind of photo-electric direct reading spectrometer spark light source according to claim 1, is characterized in that: also comprise light source control plate, described light source control plate control light source starting relay and band postpone the break-make of solid-state relay.
3. a kind of photo-electric direct reading spectrometer spark light source according to claim 2, is characterized in that: also comprise damper diode plate, be provided with and play the high damper diode plate obstructing of high tension ignition pulse between pulse forming network and auxiliary gap.
4. a kind of photo-electric direct reading spectrometer spark light source according to claim 3, is characterized in that: described firing circuit charging current is controlled by a contact of light source starting relay.
5. a kind of photo-electric direct reading spectrometer spark light source according to claim 4, is characterized in that: described auxiliary gap is 5 millimeters, described analytical gap is 4 millimeters.
6. a kind of photo-electric direct reading spectrometer spark light source according to claim 5, is characterized in that: described analytical gap is surrounded by argon gas controlled atmospher.
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| CN201410219817.8A CN103968941A (en) | 2014-05-22 | 2014-05-22 | Photoelectric direct reading spectrometer spark light source |
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| CN201410219817.8A CN103968941A (en) | 2014-05-22 | 2014-05-22 | Photoelectric direct reading spectrometer spark light source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104244545A (en) * | 2014-09-15 | 2014-12-24 | 中国科学院上海光学精密机械研究所 | Triggering pre-burning device with xenon lamp |
| 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 |
| 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 |
| CN109238962A (en) * | 2018-08-28 | 2019-01-18 | 广东省测试分析研究所（中国广州分析测试中心） | The memory mechanism in fast setting spectrum analysis gap |
| 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 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244545A (en) * | 2014-09-15 | 2014-12-24 | 中国科学院上海光学精密机械研究所 | Triggering pre-burning device with xenon lamp |
| 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 |
| 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 |
| CN109238962A (en) * | 2018-08-28 | 2019-01-18 | 广东省测试分析研究所（中国广州分析测试中心） | The memory mechanism in fast setting spectrum analysis gap |
| CN109238962B (en) * | 2018-08-28 | 2023-09-29 | 广东中科谛听科技有限公司 | Memory mechanism for quickly setting spectrum analysis gap |
| 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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Application publication date: 20140806 |
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