CN204168571U - A kind of hollow cathode lamp power supply pulse duration tunable arrangement - Google Patents
A kind of hollow cathode lamp power supply pulse duration tunable arrangement Download PDFInfo
- Publication number
- CN204168571U CN204168571U CN201420638309.9U CN201420638309U CN204168571U CN 204168571 U CN204168571 U CN 204168571U CN 201420638309 U CN201420638309 U CN 201420638309U CN 204168571 U CN204168571 U CN 204168571U
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- CN
- China
- Prior art keywords
- hollow cathode
- cathode lamp
- power supply
- microprocessor
- current source
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The utility model relates to a kind of hollow cathode lamp power supply pulse duration tunable arrangement, comprise microprocessor, D/A circuit, buffer, analog switch, principal current constant-current source, auxiliary electric current constant-current source, hollow cathode lamp, high-voltage power supply circuit and terminal, terminal is connected by cable and controls microprocessor, the output of microprocessor connects D/A circuit input end, D/A circuit output end is connected principal current constant-current source and auxiliary electric current constant-current source to control output current and pulse width values respectively by buffer and analog switch, and two analog switches connect respectively and are controlled by microprocessor, high-voltage power supply circuit output connects hollow cathode lamp to provide voltage.The utility model is according to different hollow cathode lamps, adopt digitized control mode to produce the pulse duration matched and carry out signal madulation, each lamp source can be adjusted to best operating state, increase the excitating light strength of hollow cathode lamp, ensure that the stability of the emissive porwer in lamp source, spectral purity, light and low shot noise, and then improve the technical performance of atomic fluorescence spectrometer.
Description
Technical field
The utility model relates to atomic Fluorescence Spectrometry To The Analysis field tests, particularly relates to a kind of hollow cathode lamp power supply pulse duration tunable arrangement.
Background technology
Gas generation-atomic fluorescence spectrometer has a wide range of applications in the ambits such as geology, environment, life, food hygiene, medical science, the elements such as trace As, Sb, Bi, Hg, Se, Te, Pb, Sn, Ge, Zn and Cd in energy quantitative assay all kinds sample.Current atomic fluorescence spectrometer needs when carrying out elements are contained to adopt corresponding excitation source (hollow cathode lamp), for various hollow cathode lamp, major-minor electric current constant current source power supply power supply all adopts constant pulse duration, and can not change for its power supply pulse duration of different types of hollow cathode lamp, and the pulse duration of power supply is when exciting hollow cathode lamp of the same race or not of the same race, its excitating light strength and stray light differ greatly, and have impact on the technical performance of atomic fluorescence spectrometer.
Utility model content
For the deficiencies in the prior art, the utility model is that providing a kind of adopts Digital Control mode, produce two component constant-current sources that the pulse width values that matches is adjustable, the hollow cathode lamp power supply pulse duration tunable arrangement sending maximum and stable excitating light strength powered by the hollow cathode lamp for different element.
In order to solve the problem, the utility model is achieved through the following technical solutions:
A kind of hollow cathode lamp power supply pulse duration tunable arrangement of the present utility model, comprise microprocessor, D/A circuit, buffer, analog switch, principal current constant-current source, auxiliary electric current constant-current source, hollow cathode lamp, high-voltage power supply circuit and terminal, terminal is connected by cable and controls microprocessor, the output of microprocessor connects D/A circuit input end, D/A circuit output end is connected principal current constant-current source and auxiliary electric current constant-current source to control output current and pulse width values respectively by buffer and analog switch, and two analog switches connect respectively and are controlled by microprocessor, high-voltage power supply circuit output connects hollow cathode lamp to provide voltage.
Compared with prior art, the beneficial effects of the utility model are: hollow cathode lamp power supply pulse duration tunable arrangement of the present utility model adopts Digital Control mode, for hollow cathode lamp light source of the same race or not of the same race with two component constant-current sources of the pulse duration matched for its power supply, adjustable and each optimum pulse width value needed for hollow cathode lamp source is set, so both can ensure to obtain the optimal light intensity that each element hollow cathode lamp light source sends, and less average current can be adopted, extend the useful life of hollow cathode lamp, its stability and shot noise are all improved, significantly improve the technical performance of instrument.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of hollow cathode lamp power supply pulse duration tunable arrangement of the present utility model;
Fig. 2 is the operating diagram of hollow cathode lamp of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1-2, a kind of hollow cathode lamp power supply pulse duration tunable arrangement of the present utility model, comprise microprocessor 2, D/A circuit 3, buffer, analog switch, principal current constant-current source 6, auxiliary electric current constant-current source 7, hollow cathode lamp 8, high-voltage power supply circuit 9 and terminal 1, terminal 1 is connected by cable and controls microprocessor 2, the output of microprocessor 2 connects D/A circuit 3 input, D/A circuit 3 output is connected principal current constant-current source 7 and auxiliary electric current constant-current source 6 to control output current and pulse width values respectively by buffer and analog switch, and two analog switches connect respectively and are controlled by microprocessor 2, high-voltage power supply circuit 9 output connects hollow cathode lamp 8 to provide voltage.Hollow cathode lamp power supply pulse duration tunable arrangement of the present utility model adopts Digital Control mode, for hollow cathode lamp light source of the same race or not of the same race with two component constant-current sources of the pulse duration matched for its power supply, adjustable and each optimum pulse width value needed for hollow cathode lamp source is set, so both can ensure to obtain the optimal light intensity that each element hollow cathode lamp light source sends, and less average current can be adopted, extend the useful life of hollow cathode lamp, its stability and shot noise are all improved, significantly improve the technical performance of instrument.
Principal current constant-current source 6 and auxiliary electric current constant-current source 7 terminal 1 of the hollow cathode lamp 8 of a kind of hollow cathode lamp power supply pulse duration tunable arrangement of the present utility model accurately control, the operation signal of terminal 1 is input to after D/A circuit 3 carries out digital-to-analogue conversion by microprocessor 2, principal current constant-current source 6 and auxiliary electric current constant-current source 7 is entered respectively by analog switch 41 and analog switch 51 via buffer 4 and buffer 5, and analog switch 41 and analog switch 51 control as hollow cathode lamp 8 provides pulse signal by microprocessor 2, current margin 0 ~ the 100mA of hollow cathode lamp 8, realize different hollow cathode lamps and can select different optimum pulse width values.High-voltage power supply circuit 9 provides appropriate voltage for hollow cathode lamp.
As shown in Figure 2, the ultraviolet light beam that hollow cathode lamp 8 sends is focused at the flame kernel of quartz ampoule atomizer 11 through lens 10, to excite the atomic fluorescence of generation to be detected by photomultiplier, achieves the measurement measuring technology of atomic fluorescence spectrometer.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection range of the present utility model.
Claims (1)
1. a hollow cathode lamp power supply pulse duration tunable arrangement, it is characterized in that: comprise microprocessor, D/A circuit, buffer, analog switch, principal current constant-current source, auxiliary electric current constant-current source, hollow cathode lamp, high-voltage power supply circuit and terminal, terminal is connected by cable and controls microprocessor, the output of microprocessor connects D/A circuit input end, D/A circuit output end is connected principal current constant-current source and auxiliary electric current constant-current source to control output current and pulse width values respectively by buffer and analog switch, and two analog switches connect respectively and are controlled by microprocessor, high-voltage power supply circuit output connects hollow cathode lamp to provide voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638309.9U CN204168571U (en) | 2014-10-20 | 2014-10-20 | A kind of hollow cathode lamp power supply pulse duration tunable arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638309.9U CN204168571U (en) | 2014-10-20 | 2014-10-20 | A kind of hollow cathode lamp power supply pulse duration tunable arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204168571U true CN204168571U (en) | 2015-02-18 |
Family
ID=52542214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420638309.9U Expired - Fee Related CN204168571U (en) | 2014-10-20 | 2014-10-20 | A kind of hollow cathode lamp power supply pulse duration tunable arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204168571U (en) |
-
2014
- 2014-10-20 CN CN201420638309.9U patent/CN204168571U/en not_active Expired - Fee Related
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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: 20150218 Termination date: 20201020 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |