CN201628685U - ICP auto-ignition device - Google Patents
ICP auto-ignition device Download PDFInfo
- Publication number
- CN201628685U CN201628685U CN2009202560661U CN200920256066U CN201628685U CN 201628685 U CN201628685 U CN 201628685U CN 2009202560661 U CN2009202560661 U CN 2009202560661U CN 200920256066 U CN200920256066 U CN 200920256066U CN 201628685 U CN201628685 U CN 201628685U
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- China
- Prior art keywords
- icp
- effect transistor
- field effect
- ignition device
- autotransformer
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- Expired - Fee Related
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Abstract
The utility model provides an ICP auto-ignition device which comprises a microprocessor U1. An input/output (i/o) end of the microprocessor U1 is connected with a grid (g) of a field effect transistor Q1; the drain electrode d of the field effect transistor Q1 is connected with one end of a primary coil of a self-coupling transformer; the other end of the primary coil of the self-coupling transformer is connected with the cathode of a direct-current power supply; and the anode of the direct-current power supply is connected with the source electrode s of the field effect transistor Q1. The ICP auto-ignition device has the benefits of circuit simple structure and high evaporation capacity.
Description
Technical field
The utility model relates to the ICP emission spectrometer, particularly the automatic ignition device of ICP emission spectrometer.
Background technology
ICP (Inductive Coupled Plasma Emission Spectrometer) is that the abbreviation of inductively coupled plasma spectrum generator is called for short herein, and inductively coupled plasma (ICP) is the main light source that is used for atomic emission spectrum at present.ICP has characteristics such as loop configuration, temperature height, electron density height, inert atmosphere, does excitation source with it and has that detection limit is low, analytical performances such as the range of linearity is wide, ionization, chemistry are disturbed less, accuracy and precision height.At present, the portfire that ICP is commonly used is the high voltagehigh frequency portfire, its circuit as shown in Figure 1, it is made up of low-tension arc circuit I and high voltagehigh frequency ignition circuit II two parts.During work, the 220V supply voltage is after R1 suitably reduces voltage, and T1 boosts to 3000V by transformer, and charges to capacitor C1.When the voltage between the C1 two-plate is raised to the voltage breakdown of discharging tray G1, the breakdown formation of G1 C1-L1-G1 high frequency oscillation circuit.Oscillating voltage rises to about 10000V through high-tension transformer T2, through shunt capacitance C2 analytical gap G2 is punctured, and electric arc is lighted.The low pressure exchange current carries out the low-voltage, high-current burning along forming the ionized gas passage, forms R2-G2-L2 low pressure discharge loop.When loop voltage drops to the required voltage of pilot arc discharge when following, arc extinction.When second interchange half cycle began, the high frequency ignition device was lighted electric arc once more.So repeatedly, pilot arc does not go out.Find comparatively complicated and because the alternating polarity variation of alternating current arc electrode of existing sort circuit structure through practice.
The utility model content
Comparatively complicated in order to overcome in the prior art circuit structure, and the deficiency on the above-mentioned functions that exists, the utility model provides a kind of new ICP automatic ignition device, and it is simple that this device has a circuit structure, the characteristics that evaporative power is strong.
The utility model adopts following technical scheme:
A kind of ICP automatic ignition device, it comprises a microcontroller U1, the input/output terminal i/o of described microcontroller U1 meets the grid g of a field effect transistor Q1, the drain electrode d of described field effect transistor Q1 connects the elementary end of an autotransformer T1, another elementary termination of described autotransformer T1 flows the negative pole of power supply DC always, and the positive pole of described direct supply meets the source electrode s of described field effect transistor Q1.
Preferably, described field effect transistor Q1 adopts P ditch enhancement mode field effect transistor.
Preferably, described autotransformer T1 adopts the self coupling step-up transformer of Tesla coil.
Compared with prior art, the utlity model has following advantage:
The circuit structure of this ICP automatic ignition device is simple, because the voltage and current signal that produces alternation in elementary inferior grade coupled through the self coupling step-up transformer that adopts Tesla coil, the voltage that can boost to tens thousand of volts is exported, and evaporative power is strong.Thereby high like this output voltage can produce ionization so that the working gas in the ICP work torch pipe punctures completely, and then finishes the ignition process of ICP light source.
Description of drawings
Fig. 1 is the circuit diagram of the high voltagehigh frequency portfire of ICP in the prior art.
Fig. 2 is the circuit diagram of the utility model ICP automatic ignition device.
Fig. 3 is the pulse square wave signal synoptic diagram that the utility model ICP automatic ignition device microcontroller U1 input/output terminal produces.
Embodiment
Please refer to shown in Figure 2, the circuit diagram of the utility model ICP automatic ignition device, it comprises a microcontroller U1, the input/output terminal i/o of described microcontroller U1 meets the grid g of a field effect transistor Q1, the drain electrode d of described field effect transistor Q1 connects the elementary end of an autotransformer T1, another elementary termination of described autotransformer T1 flows the negative pole of power supply DC always, and the positive pole of described direct supply meets the source electrode s of described field effect transistor Q1.
Preferably, described field effect transistor Q1 adopts P ditch enhancement mode field effect transistor.
Preferably, described autotransformer T1 adopts the self coupling step-up transformer of Tesla coil.
The course of work of the present utility model is as follows:
Computing machine can be by the time of described microcontroller U1 control ignition and the frequency of disruptive discharge.The input/output port i/o of described microcontroller U1 produces pulse square wave signal as shown in Figure 3, and this signal can be controlled described field effect transistor Q1 alternate conduction and disconnection.The voltage of described like this direct supply DC just replaces puts on the elementary of described autotransformer T1, in elementary, produce the voltage and current signal of alternation, the signal of this alternation is inferior grade coupled through described autotransformer, can boost to the voltage output of tens thousand of volts.Thereby high like this output voltage can produce ionization so that the working gas in the ICP work torch pipe punctures completely, and then finishes the ignition process of ICP light source.
Claims (3)
1. ICP automatic ignition device, it is characterized in that: comprise a microcontroller U1, the input/output terminal i/o of described microcontroller U1 meets the grid g of a field effect transistor Q1, the drain electrode d of described field effect transistor Q1 connects the elementary end of an autotransformer T1, another elementary termination of described autotransformer T1 flows the negative pole of power supply DC always, and the positive pole of described direct supply meets the source electrode s of described field effect transistor Q1.
2. ICP automatic ignition device according to claim 1 is characterized in that, described field effect transistor Q1 adopts P ditch enhancement mode field effect transistor.
3. ICP automatic ignition device according to claim 1 is characterized in that, described autotransformer T1 adopts the self coupling step-up transformer of Tesla coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202560661U CN201628685U (en) | 2009-12-02 | 2009-12-02 | ICP auto-ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202560661U CN201628685U (en) | 2009-12-02 | 2009-12-02 | ICP auto-ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201628685U true CN201628685U (en) | 2010-11-10 |
Family
ID=43060083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202560661U Expired - Fee Related CN201628685U (en) | 2009-12-02 | 2009-12-02 | ICP auto-ignition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201628685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438258A (en) * | 2013-09-05 | 2013-12-11 | 吴建堂 | Water tap with automatic water-cut-off function at time delay |
| CN105978391A (en) * | 2016-04-15 | 2016-09-28 | 成都以太航空保障工程技术有限责任公司 | Constant-voltage variable-frequency DC arc generator |
-
2009
- 2009-12-02 CN CN2009202560661U patent/CN201628685U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438258A (en) * | 2013-09-05 | 2013-12-11 | 吴建堂 | Water tap with automatic water-cut-off function at time delay |
| CN105978391A (en) * | 2016-04-15 | 2016-09-28 | 成都以太航空保障工程技术有限责任公司 | Constant-voltage variable-frequency DC arc generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20171202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |