CN104634859A - Pulse-driven PID sensor and method - Google Patents
Pulse-driven PID sensor and method Download PDFInfo
- Publication number
- CN104634859A CN104634859A CN201310549455.4A CN201310549455A CN104634859A CN 104634859 A CN104634859 A CN 104634859A CN 201310549455 A CN201310549455 A CN 201310549455A CN 104634859 A CN104634859 A CN 104634859A
- Authority
- CN
- China
- Prior art keywords
- pid sensor
- transformer
- pulsed drive
- electrode
- signal
- Prior art date
- 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.)
- Pending
Links
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention provides a pulse-driven PID sensor and method. The PID sensor comprises a driving electrode and an ultraviolet lamp and is characterized by also comprising a transformer, a pulse shape control circuit, and a microprocessor, wherein the primary coil and secondary coil of the transformer are respectively connected to the pulse shape control circuit and the driving electrode, and the microprocessor is connected to the pulse shape control circuit and is used to send a pulse control signal. The provided pulse-driven PID sensor and method reduce the energy consumption required by conventional PID sensors and prolong the service life of sensor.
Description
Technical field
The present invention relates to a kind of PID sensor and method, particularly relate to a kind of PID sensor and method of pulsed drive.
Background technology
Optic ionized sensor (Photo Ionization Detector, PID) is widely used in the detection of volatile organic matter.Relative to the sensor of the other types such as flame ionization detector (Flame Ionization Detector, FID), PID sensor has that Monitoring lower-cut is low, resolution is high, respond the advantages such as rapid, and volume is little, is convenient to be made into portable device.
PID sensor uses vacuum UV lamp (UV) to produce the ultraviolet light of specific ionization energy (as 10.6eV).When organic gas molecule is by bombarding gas molecule during sensing chamber, the organic molecule ionization contained in gas is smashed into the ion of positively charged and electronegative electronics.Under the electric field action that bias electrode and detecting electrode are formed, ion and electronics clash into pole plate, thus formation can be detected faint gas current.
In vacuum ultraviolet discharge lamp based on electrodeless gas-discharge tube technology, light source internal does not have electrode.Discharge lamp light main in the following ways: the alternation high pressure on drive electrode makes Inert gas molecule inside the minority charged particle bombardment in uviol lamp to produce avalanche effect, gas molecule in whole uviol lamp is excited and luminous, and gives off the ultraviolet light of specific wavelength through the window of certain material.The size of the intensity of the light that uviol lamp sends is with the height of driving voltage and drive the frequency of operation of high pressure relevant.In general, when driving high pressure amplitude larger, uviol lamp luminescence is stronger; When driving high voltage frequency to change from low to high, the light intensity of uviol lamp also slowly changes from weak to strong.
In prior art, PID sensor adopts continuous print sine wave AC high pressure to drive uviol lamp.But, the state that the type of drive of this uviol lamp makes uviol lamp be in work always, thus there are following problems:
(1) Ultraviolet radiation causes producing ozone in air chamber for a long time.Ozone is a kind of strong oxidizer, and its meeting and some impurity in surrounding air or some tested gas generation chemical reaction, some polymkeric substance etc. of generation can form thin film and be deposited on uviol lamp window, cause the minimizing that ultraviolet exports.
(2) Ultraviolet radiation can make the decomposition of the ultraviolet shielding plate above detecting electrode sex change even completely destroyed for a long time, cause the usefulness of ultraviolet shielding plate to reduce even to lose efficacy, and the inefficacy of ultraviolet shielding plate can make ultraviolet shine directly on detecting electrode, thus produce a large amount of Noise and Interferences.
(3) uviol lamp long-play can reduce ultraviolet output intensity, causes signal attenuation, and can shorten the life-span of uviol lamp.
(4) uviol lamp runs continuously and can consume too much electric energy, and power consumption generally can reach 200 ~ 800 milliwatts, and this can limit the application of PID sensor, especially under the applied environment of portable instrument and electric power supply inconvenience.Therefore, the power consumption reducing gas detection sensor is the target of the pursuit of field of industrial safety always.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of PID sensor and method of pulsed drive, it adopts pulse control signal to make transformer produce high voltage pulse and excites and drive uviol lamp, thus reduces power consumption, improves the practicality of PID sensor.
For achieving the above object and other relevant objects, the invention provides a kind of PID sensor of pulsed drive, comprise drive electrode and uviol lamp, wherein: also comprise transformer, shaping pulse control circuit and microprocessor, wherein, the primary coil of described transformer is connected with described drive electrode with described shaping pulse control circuit respectively with secondary coil; Described microprocessor is connected with described shaping pulse control circuit, for sending pulse control signal.
According to the PID sensor of above-mentioned pulsed drive, wherein: also comprise detecting device, signal waveform processing circuit, analog to digital converter and bias circuit, described detecting device, signal waveform processing circuit, analog to digital converter, microprocessor, shaping pulse control circuit, transformer and bias circuit successively annular are connected, wherein, the secondary coil of described transformer is connected with described bias circuit.
Further, according to the PID sensor of above-mentioned pulsed drive, wherein: described detecting device comprises two electrodes, one is bias electrode, is connected to the output terminal of described bias circuit; One is detecting electrode, is connected to the input end of described signal waveform processing circuit.
Further, according to the PID sensor of above-mentioned pulsed drive, wherein: described signal waveform processing circuit converts the current signal be used for detected by described detecting device to voltage signal, and carries out amplifying and noise reducing process to voltage signal.
Further, according to the PID sensor of above-mentioned pulsed drive, wherein: the input end of described bias circuit is connected with the secondary coil of described transformer, and output terminal is connected with the bias electrode of described detecting device.
Further, according to the PID sensor of above-mentioned pulsed drive, wherein: described detecting device is arranged on the ultraviolet optical transmission window place of described uviol lamp.
According to the PID sensor of above-mentioned pulsed drive, wherein: described drive electrode comprises two electrodes, one is high drive electrode, connects the high voltage pulse output terminal of described transformer; Another is ground connection drive electrode.
According to the PID sensor of above-mentioned pulsed drive, wherein: the operating frequency range of the pulsed drive high pressure that described transformer produces is 100HZ---500KHZ, and voltage magnitude scope is 100V---3000V, and output peak width is 0---50us.
According to the PID sensor of above-mentioned pulsed drive, wherein: adopt signal generator or timer to replace described microprocessor, for pulsing control signal.
Meanwhile, the present invention also provides a kind of method of pulsed drive PID sensor, wherein, uses the PID sensor that one of pulsed drive claim 1-9 is described.
As mentioned above, the PID sensor of pulsed drive of the present invention and method, be different from traditional employing continuous print sine wave AC high pressure to drive the sensor of uviol lamp, have following beneficial effect:
(1) by the lower power consumption of PID sensor to 5 ~ 500mW;
(2) extend the life-span of uviol lamp, reduce the decay of sensor signal;
(3) generation of ozone is decreased;
(4) decrease the destruction of ultraviolet shielding plate, protect detecting electrode.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of the PID sensor of pulsed drive in a preferred embodiment of the present invention;
Fig. 2 is shown as continuous sine wave in prior art and exchanges the waveform schematic diagram of the pulse drive mode in type of drive and the present invention.
Element numbers explanation
1 detecting device
2 drive electrodes
3 uviol lamps
4 transformers
5 shaping pulse control circuits
6 microprocessors
7 signal waveform processing circuits
8 analog to digital converters
9 bias circuits
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
PID sensor will work, and uviol lamp must be excited and light, and lights uviol lamp and just needs high pressure.From adopt continuous print sine wave AC high pressure to drive uviol lamp different in prior art, in the present invention, adopt transformer, shaping pulse control circuit and microcontroller export high voltage pulse, to excite and to light uviol lamp.
For the vacuum UV lamp based on electrodeless gas-discharge tube technology, its light source internal does not have electrode.The principle of pulsed drive uviol lamp luminescence is: the pulsed drive high pressure on drive electrode makes Inert gas molecule in the minority charged particle bombardment uviol lamp in uviol lamp thus produces avalanche effect, and the gas molecule in whole uviol lamp is excited and luminous.Therefore, the size of uviol lamp light intensity is relevant with the frequency of operation of the height of pulsed driving voltage and pulsed driving voltage.In general, the amplitude of pulsed driving voltage is larger, and the light that uviol lamp sends is stronger.When the frequency of pulsed driving voltage changes from low to high, the light intensity of uviol lamp also slowly changes from weak to strong.
In basic framework of the present invention, the PID sensor of pulsed drive mainly comprises drive electrode, uviol lamp, transformer, shaping pulse control circuit and microprocessor, wherein, the primary coil of transformer is connected with drive electrode with shaping pulse control circuit respectively with secondary coil, and uviol lamp is arranged on drive electrode inside; Microprocessor is connected with shaping pulse control circuit.The pulse control signal that microprocessor sends is after the process of shaping pulse control circuit, the break-make of the armature winding path of control transformer, ceaselessly to produce transient current in the primary coil of transformer, then namely the pulsed drive high pressure produced in the secondary coil of the transformer can be used for exciting and driving uviol lamp.
With reference to Fig. 1, in a preferred embodiment of the invention, the PID sensor of pulsed drive comprises detecting device 1, drive electrode 2, uviol lamp 3, transformer 4, shaping pulse control circuit 5, microprocessor 6, signal waveform processing circuit 7, analog to digital converter 8 and bias circuit 9.Wherein, detecting device 1, signal waveform processing circuit 7, analog to digital converter 8, microprocessor 6, shaping pulse control circuit 5, transformer 4 and bias circuit 9 successively annular are connected, and the primary coil of transformer 4 is connected with bias circuit 9 with shaping pulse control circuit 5 respectively with secondary coil.Drive electrode 2 is connected on the secondary coil of transformer 4 again, and uviol lamp 3 is arranged in drive electrode 2, and detecting device 1 is arranged on the luminescence window place of uviol lamp 1.
During work, microprocessor 6 sends pulse control signal, shaping pulse control circuit 5 paired pulses control signal is optimized the armature winding path ceaselessly break-make of control transformer 4 afterwards, thus ceaselessly produces transient current in the inductive primary of transformer 4.According to the principle of work of electromagnetic induction and transformer, required pulsed drive High voltage output will be obtained in the inductive secondary of transformer 4, for exciting and driving uviol lamp 3.
After uviol lamp 3 is lighted by driving, the sensitive gas ionization in detecting device 1 is formed charged particle.This charged particle deflects and forms electric current in the electric field formed by bias circuit 9, then digital signal is obtained through signal waveform processing circuit 7, analog to digital converter 8, finally by being compensated the digital signal obtained by microprocessor 6 and the process further such as computing, export the concentration signal of tested gas, to meet various different application demand.
Particularly, in the present invention, the operating frequency range of pulsed drive high pressure is 100HZ---500KHZ, and output peak width is 0---50us, and voltage magnitude scope is 100V---3000V.With reference to Fig. 2, because pulsed drive high pressure right and wrong are successional, compared to sine wave AC high pressure or the type of drive of the continuous high pressure of other form, in the pulsed drive high drive lower unit interval, transformer 4 power consumption is less, thus can reach energy-saving and cost-reducing object.
In the preferred embodiment, detecting device 1 comprises two electrodes, and one is bias electrode, is connected to the output terminal of bias circuit 9; One is detecting electrode, is connected to the input end of signal waveform processing circuit 7.A DC electric field is formed between bias electrode and detecting electrode.Uviol lamp 3 can produce the ultraviolet light of specific wavelength, and this ultraviolet light is by after the sensitive gas ionization in detecting device 1, and the negative ions of generation is moved under DC electric field effect.Detecting device 1 detects the negative ions in DC electric field, and converts thereof into current signal.
Bias circuit 9 is for generation of direct current (DC) bias.The detecting electrode of this direct current (DC) bias and detecting device 1 forms a DC electric field.
Signal waveform processing circuit 7 converts the current signal detected by detecting device 1 to voltage signal, and carries out amplifying and noise reducing process to voltage signal, produces the analog voltage signal needed for analog to digital converter 8.
Analog to digital converter 8 converts the analog voltage signal coming from signal waveform processing circuit 7 to digital signal, and is transferred to microprocessor 6.
Microprocessor 6 produces the various control signals needed for pulse control signal and interlock circuit, carries out overall treatment to data, and responsible each functional module of coordinating works in order.Wherein, because pulse control signal can the primary coil path make-and-break time of control transformer 4, so the power that uviol lamp 3 and transformer 4 consume also can be regulated.Under the prerequisite that transformer 4 can normally work, the time of primary coil conducting is longer, and the power that it consumes is larger; Otherwise the power that it consumes is less.In the PID sensor of pulsed drive of the present invention, major power is consumed by uviol lamp 3 and transformer 4.Therefore, the power that reduction uviol lamp 3 and transformer 4 consume, just reduces the power consumption that PID sensor consumes.
Shaping pulse control circuit 5 is for optimizing the waveform of pulse control signal and controlling to output to the electric signal of the primary coil of transformer 4.
Transformer 4 exports 2 kinds of voltages at the different wire locations of secondary coil, one tunnel exports high voltage pulse, be connected to drive electrode 2, for driving uviol lamp 3, another road output AC voltage, to the input end of bias circuit 9, is connected to the bias electrode of detecting device 1 after changing required DC offset voltage into.
Drive electrode 2 excites and drives uviol lamp 3 to work, and it comprises 2 electrodes, and one is high drive electrode, the high voltage pulse output terminal of connection transformer 4, and one is ground connection drive electrode.Uviol lamp 3 is arranged between high drive electrode and ground connection drive electrode.
In another preferred embodiment of the invention, the generation of pulse control signal is not necessarily confined to microprocessor, as long as can produce the electron device or electronic equipment that meet this demand.Such as signal generator also can provide the pulse control signal met the demands; Or timer also can be used for producing pulse signal.
In sum, the PID sensor of pulsed drive of the present invention and method, reduce the large power consumption needed for traditional approach, extend the serviceable life of sensor.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. the PID sensor of a pulsed drive, comprise drive electrode and uviol lamp, it is characterized in that: also comprise transformer, shaping pulse control circuit and microprocessor, wherein, the primary coil of described transformer is connected with described drive electrode with described shaping pulse control circuit respectively with secondary coil; Described microprocessor is connected with described shaping pulse control circuit, for sending pulse control signal.
2. the PID sensor of pulsed drive according to claim 1, it is characterized in that: also comprise detecting device, signal waveform processing circuit, analog to digital converter and bias circuit, described detecting device, signal waveform processing circuit, analog to digital converter, microprocessor, shaping pulse control circuit, transformer and bias circuit successively annular are connected, wherein, the secondary coil of described transformer is connected with described bias circuit.
3. the PID sensor of pulsed drive according to claim 2, is characterized in that: described detecting device comprises two electrodes, and one is bias electrode, is connected to the output terminal of described bias circuit; One is detecting electrode, is connected to the input end of described signal waveform processing circuit.
4. the PID sensor of pulsed drive according to claim 2, is characterized in that: described signal waveform processing circuit converts the current signal be used for detected by described detecting device to voltage signal, and carries out amplifying and noise reducing process to voltage signal.
5. the PID sensor of pulsed drive according to claim 2, is characterized in that: the input end of described bias circuit is connected with the secondary coil of described transformer, and output terminal is connected with the bias electrode of described detecting device.
6. the PID sensor of pulsed drive according to claim 2, is characterized in that: described detecting device is arranged on the ultraviolet optical transmission window place of described uviol lamp.
7. the PID sensor of pulsed drive according to claim 1, is characterized in that: described drive electrode comprises two electrodes, and one is high drive electrode, connects the high voltage pulse output terminal of described transformer; Another is ground connection drive electrode.
8. the PID sensor of pulsed drive according to claim 1, is characterized in that: the operating frequency range of the pulsed drive high pressure that described transformer produces is 100HZ---500KHZ, and voltage magnitude scope is 100V---3000V, and output peak width is 0---50us.
9. the PID sensor of pulsed drive according to claim 1, is characterized in that: adopt signal generator or timer to replace described microprocessor, for pulsing control signal.
10. by a method for pulsed drive PID sensor, it is characterized in that, use the PID sensor that one of pulsed drive claim 1-9 is described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549455.4A CN104634859A (en) | 2013-11-07 | 2013-11-07 | Pulse-driven PID sensor and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549455.4A CN104634859A (en) | 2013-11-07 | 2013-11-07 | Pulse-driven PID sensor and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104634859A true CN104634859A (en) | 2015-05-20 |
Family
ID=53213846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310549455.4A Pending CN104634859A (en) | 2013-11-07 | 2013-11-07 | Pulse-driven PID sensor and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104634859A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07106087A (en) * | 1993-09-30 | 1995-04-21 | Origin Electric Co Ltd | Electronic lighting device for ultraviolet radiation discharge lamp |
| US6967485B1 (en) * | 2003-06-27 | 2005-11-22 | Rae Systems, Inc. | Automatic drive adjustment of ultraviolet lamps in photo-ionization detectors |
| CN101006339A (en) * | 2004-08-06 | 2007-07-25 | 华瑞科学仪器(上海)有限公司 | Integrated optic ionized sensor |
| WO2008043201A1 (en) * | 2006-10-08 | 2008-04-17 | Rae Systems (Shanghai) Inc. | Photo-ionization sensor for detecting the concentration of gas and method thereof |
| CN101504388A (en) * | 2009-03-16 | 2009-08-12 | 中北大学 | Miniature optical ionization sensor |
| CN101917812A (en) * | 2010-08-12 | 2010-12-15 | 兰卫国 | Metal halide lamp power supply and method for lighting metal halide lamp |
-
2013
- 2013-11-07 CN CN201310549455.4A patent/CN104634859A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07106087A (en) * | 1993-09-30 | 1995-04-21 | Origin Electric Co Ltd | Electronic lighting device for ultraviolet radiation discharge lamp |
| US6967485B1 (en) * | 2003-06-27 | 2005-11-22 | Rae Systems, Inc. | Automatic drive adjustment of ultraviolet lamps in photo-ionization detectors |
| CN101006339A (en) * | 2004-08-06 | 2007-07-25 | 华瑞科学仪器(上海)有限公司 | Integrated optic ionized sensor |
| WO2008043201A1 (en) * | 2006-10-08 | 2008-04-17 | Rae Systems (Shanghai) Inc. | Photo-ionization sensor for detecting the concentration of gas and method thereof |
| CN101563601A (en) * | 2006-10-08 | 2009-10-21 | 华瑞科学仪器(上海)有限公司 | Photo-ionization sensor for detecting the concentration of gas and method thereof |
| CN101504388A (en) * | 2009-03-16 | 2009-08-12 | 中北大学 | Miniature optical ionization sensor |
| CN101917812A (en) * | 2010-08-12 | 2010-12-15 | 兰卫国 | Metal halide lamp power supply and method for lighting metal halide lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5420481A (en) | Fluorescent lamp with wide range of luminous intensities | |
| CN107068535B (en) | Inductively dielectric-barrier discharge lamp | |
| JP3355976B2 (en) | Discharge lamp lighting device | |
| US9443709B2 (en) | Corona ionization device and method | |
| KR101539581B1 (en) | Method of driving a light source, light source assembly for performing the method and liquid crystal display device having the same | |
| CN209347682U (en) | Flash ultraviolet-sterilization robot | |
| Meißer | Resonant behaviour of pulse generators for the efficient drive of optical radiation sources based on dielectric barrier discharges | |
| CA2406194A1 (en) | Methods and systems for providing emission of incoherent radiation and uses therefor | |
| CN203407059U (en) | Microwave medium barrier discharge plasma generating device | |
| CN104634859A (en) | Pulse-driven PID sensor and method | |
| CN103969245A (en) | Vacuum photoelectric direct-reading spectrometer | |
| US10026600B2 (en) | Corona ionization apparatus and method | |
| CN203908954U (en) | Vacuum photoelectric direct reading spectrometer | |
| EP1094498A8 (en) | Method and device for generating optical radiation | |
| Baroch et al. | Generation of plasmas in water: utilization of a high-frequency, low-voltage bipolar pulse power supply with impedance control | |
| TW200937492A (en) | Ultraviolet radiation apparatus | |
| CN102327638A (en) | Pulsed ultraviolet ozone sterilizing device | |
| Jinno et al. | Luminance and efficacy improvement of low-pressure xenon pulsed fluorescent lamps by using an auxiliary external electrode | |
| Cho et al. | Wall voltage and priming effect due to auxiliary electrode in AC PDP with auxiliary electrode | |
| CN201628685U (en) | ICP auto-ignition device | |
| CN214624969U (en) | Device for exciting electrodeless lamp tube to generate ultraviolet rays by adopting microwaves | |
| EP2337432B1 (en) | Resonance circuitry for a field emission lighting arrangement | |
| CN205157169U (en) | Shimmer image intensifier characteristic test system | |
| CN112082902B (en) | Device for improving density of OH free radicals discharged in water and measuring method thereof | |
| GB2391108A (en) | Radiation detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150520 |
|
| RJ01 | Rejection of invention patent application after publication |