CN104280380A

CN104280380A - Spark excitation light source of photoelectric direct-reading spectrograph

Info

Publication number: CN104280380A
Application number: CN201410577783.XA
Authority: CN
Inventors: 陈进
Original assignee: HEFEI ZHUOYUE ANALYTICAL INSTRUMENTS Co Ltd
Current assignee: HEFEI ZAIDE MACROMOLECULE MATERIAL CO., LTD.
Priority date: 2014-10-24
Filing date: 2014-10-24
Publication date: 2015-01-14

Abstract

The invention discloses a spark excitation light source of a photoelectric direct-reading spectrograph. An alternating-current input power supply is connected with a transformer; a light source control circuit comprises a light source starting relay, a solid-state delay relay, a pre-combustion delay circuit, an exposure delay circuit, a timing signal control panel and a power board, wherein the voltage output by the transformer is directly loaded on the timing signal control plate; the voltage output by the transformer is loaded on the power board through the light source starting relay and the solid-state delay relay to generate high direct voltage; after the pre-combustion delay circuit is delayed, the solid-state delay relay is not electrified; after the exposure delay circuit is delayed, the solid-state delay relay is electrified; the direct-current high-voltage power output by the power board is supplied to capacitors of a PFN pulse forming loop and an ignition circuit for charging respectively; and the timing signal control panel outputs a charging control pulse to the PFN pulse forming loop. The spark excitation light source of the photoelectric direct-reading spectrograph is simple in structure and has the characteristics of stable discharging frequency, stable charging time and stable discharging energy so that the aim of stably exciting the spark light source is achieved.

Description

A kind of photoelectric direct-reading spectrograph excite spark light source

Technical field

The present invention relates to photo-electric direct reading spectrometer technical field, what particularly relate to a kind of photoelectric direct-reading spectrograph excites spark light source.

Background technology

Photo-electric direct reading spectrometer is widely used in metallurgy, machinery and other industrial sectors, carries out the examination and test of products of the on-line analysis before smelting furnace and centralab, is one of effective means controlling product quality.Current photo-electric direct reading spectrometer excites spark light source, there is the shortcoming of discharge frequency instability, duration of charging charging ability instability, thus cannot reach the stable feature exciting spark light source.

Summary of the invention

In order to solve the technical matters existed in background technology, what the present invention proposes a kind of photoelectric direct-reading spectrograph excites spark light source, structure is simple, has the feature of stable discharge frequency, stable duration of charging and discharge energy, thus reaches the stable object exciting spark light source.

The present invention propose a kind of photoelectric direct-reading spectrograph excite spark light source, comprise alternating current input power supplying, transformer, control circuit for light source, PFN pulse shaping loop and firing circuit, alternating current input power supplying connects with transformer, control circuit for light source comprises light source starting relay, solid-state timing relay, pre-burning delay circuit, exposure delay circuit, timing signal control panel and power amplifier board, the voltage that transformer exports directly is loaded on timing signal control panel, transformer output voltage is loaded on power amplifier board through light source starting relay and solid-state delay relay and produces high direct voltage, after pre-burning delay circuit delays, solid-state delay relay does not power on, after exposure delay circuit postpones, solid-state delay relay powers on, the DC high-voltage that power amplifier board exports supplies the capacitor charging of PFN pulse shaping loop and firing circuit respectively, timing signal control panel exports charging gating pulse to PFN pulse shaping loop, the DC high-voltage that power amplifier board exports forms 100Hz pulse through bridge rectifier circuit, after reaching semisinusoidal crest, the voltage on the electric capacity in PFN pulse shaping loop is charged to 550 ~ 650V, timing signal control panel exports charging gating pulse and igniting trigger pulse to firing circuit, firing circuit generation high tension ignition pulse is added to the analytical gap between sample and tungsten electrode through auxiliary gap, for PFN pulse shaping tank capacitance electric discharge formation passage, firing circuit produces-30KV high pressure, and the trigger circuit on firing circuit control the duration of ignition.

Preferably, control circuit for light source is provided with the light source control plate of the break-make controlling light source starting relay and solid-state delay relay.

Preferably, between PFN pulse shaping loop and auxiliary gap, be provided with the damper diode plate playing and high tension ignition pulse is obstructed.

Preferably, damper diode plate makes the capacitance voltage on PFN pulse shaping loop reach DC900 ~ 1000V, is discharged on exciting electrode and completes an excitation process after firing circuit ignites.

Preferably, analytical gap is surrounded by argon gas controlled atmospher, and the spacing between analytical gap is 9 ~ 11mm.

A kind of photoelectric direct-reading spectrograph provided by the invention excite spark light source, comprise a pre-burning stage and an exposure stage, with the process of high-energy discharge as sample analysis, after pre-burning delay circuit delays, solid-state delay relay does not power on, after exposure delay circuit postpones, solid-state delay relay powers on, and ensure that stable discharge frequency; Timing signal control panel exports charging gating pulse, exports charging gating pulse and igniting trigger pulse to firing circuit to PFN pulse shaping loop, ensure that stable discharge time; Firing circuit generation high tension ignition pulse is added to the analytical gap between sample and tungsten electrode through auxiliary gap, is that PFN pulse shaping tank capacitance electric discharge formation passage produces-30KV high pressure, ensure that stable discharge energy; Thus reach the stable object exciting spark light source.

Accompanying drawing explanation

Fig. 1 is the structural representation exciting spark light source of a kind of photoelectric direct-reading spectrograph that the present invention proposes.

Embodiment

As shown in Figure 1, Fig. 1 is the structural representation exciting spark light source of a kind of photoelectric direct-reading spectrograph that the present invention proposes.

With reference to Fig. 1, the present invention propose a kind of photoelectric direct-reading spectrograph excite spark light source, comprise alternating current input power supplying, transformer, control circuit for light source, PFN pulse shaping loop and firing circuit, alternating current input power supplying connects with transformer, control circuit for light source comprises light source starting relay, solid-state timing relay, pre-burning delay circuit, exposure delay circuit, timing signal control panel and power amplifier board, the voltage that transformer exports directly is loaded on timing signal control panel, transformer output voltage is loaded on power amplifier board through light source starting relay and solid-state delay relay and produces high direct voltage, after pre-burning delay circuit delays, solid-state delay relay does not power on, after exposure delay circuit postpones, solid-state delay relay powers on, control circuit for light source is provided with the light source control plate of the break-make controlling light source starting relay and solid-state delay relay.

The DC high-voltage that power amplifier board exports supplies the capacitor charging of PFN pulse shaping loop and firing circuit respectively, timing signal control panel exports charging gating pulse to PFN pulse shaping loop, the DC high-voltage that power amplifier board exports forms 100Hz pulse through bridge rectifier circuit, after reaching semisinusoidal crest, voltage on the electric capacity in PFN pulse shaping loop is charged to 550 ~ 650V, the inverse electromotive force of inductance in addition, due to the iris action of diode, make electric capacity to be applied again a voltage, voltage on capacitor is made to reach DC900 ~ 1000V, be discharged into after firing circuit ignites on exciting electrode and complete an excitation process, firing circuit effect punctures analytical gap between sample and silver electrode, and analytical gap is surrounded by argon gas controlled atmospher, and the spacing between analytical gap is 9 ~ 11mm, for PFN pulse shaping tank capacitance electric discharge formation passage, firing circuit produces-30KV a high pressure, and the trigger circuit on igniting plate control the duration of ignition, and make it coordinate major loop work, spark rate is 100Hz.

Control circuit for light source of the present invention comprises a pre-burning stage and an exposure stage, with the process of high-energy discharge as sample analysis, after pre-burning delay circuit delays, solid-state delay relay does not power on, after exposure delay circuit postpones, solid-state delay relay powers on, and ensure that stable discharge frequency; Timing signal control panel exports charging gating pulse, exports charging gating pulse and igniting trigger pulse to firing circuit to PFN pulse shaping loop, ensure that stable discharge time; Firing circuit generation high tension ignition pulse is added to the analytical gap between sample and tungsten electrode through auxiliary gap, for PFN pulse shaping tank capacitance electric discharge formation passage produces-30KV high pressure, ensure that stable discharge energy, thus reach the stable object exciting spark light source.

The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.

Claims

1. a photoelectric direct-reading spectrograph excite spark light source, it is characterized in that, comprise alternating current input power supplying, transformer, control circuit for light source, PFN pulse shaping loop and firing circuit, alternating current input power supplying connects with transformer, control circuit for light source comprises light source starting relay, solid-state timing relay, pre-burning delay circuit, exposure delay circuit, timing signal control panel and power amplifier board, the voltage that transformer exports directly is loaded on timing signal control panel, transformer output voltage is loaded on power amplifier board through light source starting relay and solid-state delay relay and produces high direct voltage, after pre-burning delay circuit delays, solid-state delay relay does not power on, after exposure delay circuit postpones, solid-state delay relay powers on, the DC high-voltage that power amplifier board exports supplies the capacitor charging of PFN pulse shaping loop and firing circuit respectively, timing signal control panel exports charging gating pulse to PFN pulse shaping loop, the DC high-voltage that power amplifier board exports forms 100Hz pulse through bridge rectifier circuit, after reaching semisinusoidal crest, the voltage on the electric capacity in PFN pulse shaping loop is charged to 550 ~ 650V, timing signal control panel exports charging gating pulse and igniting trigger pulse to firing circuit, firing circuit generation high tension ignition pulse is added to the analytical gap between sample and tungsten electrode through auxiliary gap, for PFN pulse shaping tank capacitance electric discharge formation passage, firing circuit produces-30KV high pressure, and the trigger circuit on firing circuit control the duration of ignition.

2. photoelectric direct-reading spectrograph according to claim 1 excite spark light source, it is characterized in that, control circuit for light source is provided with the light source control plate of the break-make controlling light source starting relay and solid-state delay relay.

3. photoelectric direct-reading spectrograph according to claim 1 excite spark light source, it is characterized in that, between PFN pulse shaping loop and auxiliary gap, be provided with the damper diode plate playing and high tension ignition pulse is obstructed.

4. photoelectric direct-reading spectrograph according to claim 1 excite spark light source, it is characterized in that, damper diode plate makes the capacitance voltage on PFN pulse shaping loop reach DC900 ~ 1000V, is discharged on exciting electrode and completes an excitation process after firing circuit ignites.

5. photoelectric direct-reading spectrograph according to claim 1 excite spark light source, it is characterized in that, analytical gap is surrounded by argon gas controlled atmospher, and the spacing between analytical gap is 9 ~ 11mm.