CN105699306B - Suitable for the dual wavelength test device of shock tube ignition delay time judgement - Google Patents
Suitable for the dual wavelength test device of shock tube ignition delay time judgement Download PDFInfo
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- CN105699306B CN105699306B CN201610181597.3A CN201610181597A CN105699306B CN 105699306 B CN105699306 B CN 105699306B CN 201610181597 A CN201610181597 A CN 201610181597A CN 105699306 B CN105699306 B CN 105699306B
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- filter
- shock tube
- test device
- photomultiplier
- delay time
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N2021/3129—Determining multicomponents by multiwavelength light
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- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of dual wavelength test devices suitable for the judgement of shock tube ignition delay time, by two nested structures, identical opto-electronic conversion mechanism forms, opto-electronic conversion mechanism includes fibre-optical splice, spike filter, bandpass filter, photomultiplier and operational amplifier circuit plate, complex light imports after test device and is filtered into monochromatic light by spike filter, when monochromatic light passes through bandpass filter, stray light therein is further filtered, monochromatic light after filtering enters photomultiplier, convert optical signals into electric signal, dual wavelength test device is drawn after operational amplifier circuit is handled.Spike filter in the dual wavelength test device of the present invention respectively includes the different and changeable optical filter of two panels centre wavelength, can meet shock tube different location OH or CH* atomic radical or the measurement needs of same position difference atomic radical concentration；Its is simple in structure, easy to operate, and manufacture is at low cost, and placement facilitates secured, and shading performance is good, and test result is accurately and reliably.
Description
Technical field
The present invention relates to spectral intensity measuring device, in particular to a kind of suitable for the double of shock tube ignition delay time judgement
Wavelength measurement device.
Background technology
At present, shock tube ignition delay time judgement used by standard mainly include experimentation in pressure variation and
The measurement of two kinds of the variation of OH or CH* atomic radical concentration, existing shock tube OH and the variation of CH* atomic radicals concentration is adopted mostly
Combination with optical filter and photomultiplier or the combination using grating monochromator and photomultiplier.
During using optical filter and photomultiplier measurement, it is necessary to fix the optical filter being close together and photomultiplier
It is arranged on shock tube tube body, is arranged so that and is inconvenient, and be susceptible to placement loosely, and then influence test result；Meanwhile
The necessary complete shading in optical filter both sides, avoids the light of other wavelength from entering photomultiplier, influences measurement result.
During using grating monochromator and photomultiplier measurement, optical signal can be introduced into grating monochromator with optical fiber.This
When, grating monochromator can be placed arbitrarily, and since the shading of grating monochromator cabinet itself is good, not need to do again additional
Sealing.However, if it is desired to improve the resolution ratio of grating monochromator, reduce the monochromatic bandwidth of outgoing, then double light must be used
Grid increase its focal length, and grating monochromator Cabinet Size is caused to significantly increase, and then its space occupied is made to increase severely.Also,
In actual mechanical process, the judgement of shock tube ignition delay time generally comprises two methods：One kind is apart from shock tube tail
The concentration signal that OH or CH* atomic radicals are measured on the side wall of a segment length is held, another kind is in the cecum face of shock tube tail end
The upper concentration signal for measuring OH or CH* atomic radicals, the data that both methods measures have certain difference, due to grating monochrome
The cost of instrument is higher, when need simultaneously measure shock tube same position OH and CH* atomic radicals concentration variation or shock tube not
With position OH or CH* atomic radicals concentration variation when, it is necessary to while use two grating monochromators, substantially increase equipment
Cost.
Invention content
It is insufficient existing for above-mentioned background technology present invention aim to overcome, a kind of catch fire suitable for shock tube is provided and is prolonged
The dual wavelength test device of slow time judgement, it is of simple structure and low cost, easy to operate, it can either synchro measure shock tube
In OH the and CH* atomic radical signals of same position, but can synchro measure shock tube different location OH and CH* atom bases
Group's signal.
To achieve the above object, the present invention adopts the following technical scheme that：One kind is suitable for shock tube ignition delay time and judges
Dual wavelength test device, including a shading cabinet, the shading cabinet inside is set side by side with the identical light of two nested structures
Electric switching mechanism；The opto-electronic conversion mechanism has the optical fiber interface being mounted on one side box wall of shading cabinet, mounted on shading
Cabinet inside and optical fiber interface photomultiplier positioned opposite and the fortune for handling photomultiplier output voltage signal
Circuit board is put, the output terminal of the operational amplifier circuit plate is provided with the data transmission that can be connected with extraneous display instrument input terminal and connects
Mouthful；The opto-electronic conversion mechanism also has the cross slide way being mounted between optical fiber interface and photomultiplier, and the transverse direction is led
The the first optical filter installation pedestal and the second optical filter installation pedestal being slidably matched with it, first optical filter are provided on rail
Have can the first spike filter matching used with photomultiplier and the first bandpass filter for parallel arrangement successively in installation pedestal
Piece, have also can the second narrowband filter matching used with photomultiplier for parallel arrangement successively in the second optical filter installation pedestal
Mating plate and the second bandpass filter；When the opto-electronic conversion mechanism is in running order, base is installed by adjusting the first optical filter
The position of seat or the second optical filter installation pedestal on cross slide way, makes optical fiber interface and the first spike filter and the first band logical
The center line of optical filter is on the same line or makes optical fiber interface and the second spike filter and the second bandpass filter
Center line it is on the same line, so as to meet synchro measure shock tube same position or different location OH signals and
The needs of CH* signals.
In the above-mentioned technical solutions, the centre wavelength of first spike filter be 307nm, second narrow-band-filter
The centre wavelength of piece is 433nm.
In the above-mentioned technical solutions, the cutoff wavelength of first bandpass filter and the second bandpass filter for 500~
800nm。
In the above-mentioned technical solutions, the response frequency of the photomultiplier is 1ns.
The the first optical filter installation pedestal set on the cross slide way as optimal technical scheme and the second optical filter peace
It is in conjoined structure to fill pedestal.
Further, it is additionally provided with to control the first optical filter installation pedestal and the second optical filter on the cross slide way
The optical filter switching mechanism that installation pedestal is slided and positioned, the control button of the optical filter switching mechanism are arranged on shading cabinet
On one side box wall.
Further, the data transmission interface is mounted on another side box wall of shading cabinet.
The operation principle of the present invention is as follows：In shock tube ignition time practical decision process, when need measure shock tube
In OH the and CH* atomic radical signals of same position, by optical filter switching push button, the identical photoelectricity of two nested structures of control turns
The position of first optical filter installation pedestal or the second optical filter installation pedestal on cross slide way in converting mechanism, while make two sets of light
Optical fiber interface and the centerline of the first spike filter and the first bandpass filter in electric switching mechanism is in same straight line
On or in Shi Liangtao opto-electronic conversions mechanism make optical fiber interface and the second spike filter and the second bandpass filter simultaneously
Center line is on the same line, and optical signal introduces shock tube by optical fiber, successively by spike filter, bandpass filter
Filtering and photomultiplier opto-electronic conversion and operational amplifier circuit plate voltage signal measurement, be finally reached measure shock wave
The purpose that pipe changes in the concentration of the OH and CH* atomic radicals of same position；When need measure shock tube different location OH
During with CH* atomic radical signals, measuring principle is similar to the above, and by optical filter switching push button, two nested structures of control are identical
Opto-electronic conversion mechanism in the position of the first optical filter installation pedestal or the second optical filter installation pedestal on cross slide way, make it
In optical fiber interface in a set of opto-electronic conversion mechanism with the centerline of the first spike filter and the first bandpass filter in same
On straight line, in the optical fiber interface and the second spike filter and the second bandpass filter in another set of opto-electronic conversion mechanism
Heart line is on the same line, and the optical signal of shock tube different location is introduced the corresponding of test device by optical fiber
In opto-electronic conversion mechanism, successively by spike filter, the filtering of bandpass filter and photomultiplier opto-electronic conversion and
The measurement of the voltage signal of operational amplifier circuit plate, be finally reached measure shock tube different location OH and CH* atomic radicals it is dense
Spend the purpose of variation.
Compared with prior art, the beneficial effects of the present invention are：Designed sentences suitable for shock tube ignition delay time
Fixed dual wavelength test device is simple in structure, easy to operate, manufacture is at low cost, and is an integral structure, and placement facilitates secured, screening
Optical property is good, and test result is accurately and reliably；Meanwhile two pieces of spike filters in the dual wavelength test device are respectively provided with difference
Centre wavelength, and can mutually switch with photomultiplier coordinate, can either synchro measure shock tube same position OH believe
Number and CH* signals, and can synchro measure shock tube in the OH signals of different location and CH* signals.
Description of the drawings
Fig. 1 is a kind of structure diagram of the dual wavelength test device suitable for the judgement of shock tube ignition delay time；
Fig. 2 is the light path schematic diagram of dual wavelength test device shown in Fig. 1；
In figure：Fibre-optical splice 1, the first optical filter installation pedestal 2a, the second optical filter installation pedestal 2b, the first narrow-band-filter
Piece 3a, the second spike filter 3b, the first bandpass filter 4a, the second bandpass filter 4b, cross slide way 5, photomultiplier
6, operational amplifier circuit plate 7, data transmission interface 8, shading cabinet 9, optical filter switching push button 10, opto-electronic conversion mechanism 11.
Specific embodiment
For the ease of those skilled in the art understand that with the present invention is implemented, in the following with reference to the drawings and specific embodiments to this hair
It is bright to be described in further detail, but the present invention is not limited to the following embodiments.
As shown in the figure, the dual wavelength test device that the present invention is suitable for the judgement of shock tube ignition delay time includes a shading
Cabinet 9 is set side by side with the identical opto-electronic conversion mechanism 11 of two nested structures inside shading cabinet 9.Often set opto-electronic conversion mechanism 11
Including be mounted on 9 one side box wall of shading cabinet optical fiber interface 1, mounted on the inside of shading cabinet 9 with optical fiber interface 1 with respect to cloth
The photomultiplier 6 put, the cross slide way 5 between optical fiber interface 1 and photomultiplier 6 and for handling photoelectricity
The operational amplifier circuit plate 7 of 6 output voltage signal of multiplier tube；The response frequency of photomultiplier 6 is 1ns；It is provided on cross slide way 5
With its be slidably matched in conjoined structure the first optical filter installation pedestal 2a and the second optical filter installation pedestal 2b and be used for
The optical filter switching mechanism 10 that the first optical filter installation pedestal 2a and the second optical filter installation pedestal 2b is controlled to slide and position, the
On one optical filter installation pedestal 2a successively parallel arrangement have can with 6 matching used first spike filter 3a of photomultiplier and
On first bandpass filter 4a, the second optical filter installation pedestal 2b successively parallel arrangement have also can with photomultiplier 6 is mating makes
The centre wavelength of second spike filter 3b and the second bandpass filter 4b, the first spike filter 3a be 307nm, second
The centre wavelength of spike filter 3b is that the cutoff wavelength of 433nm, the first bandpass filter 4a and the second bandpass filter 4b are
500~800nm, the control button of optical filter switching mechanism 10 are arranged on 9 one side box wall of shading cabinet；Operational amplifier circuit plate 7
Output terminal is provided with the data transmission interface 8 that can be connected with extraneous display instrument input terminal, and data transmission interface 8 is mounted on shading
On 9 another side box wall of cabinet.
When the present invention is in running order, it is disposed in parallel in two sets of identical photoelectricity of the structure inside shading cabinet 9 and turns
Converting mechanism 11 adjusts the first optical filter installation pedestal 2a or second by the control button of optical filter switching mechanism 10 respectively and filters
Positions of the piece installation pedestal 2b on cross slide way 5 makes 1 and first spike filter 3a of optical fiber interface and the first bandpass filter
The center line of 4a is on the same line or makes 1 and second spike filter 3b of optical fiber interface and the second bandpass filter
The center line of 4b is on the same line, so as to meet synchro measure shock tube same position or different location OH atoms
The needs of group signal and CH* atomic radical signals.
Above-described embodiment be only the present invention the best example, rather than a limitation of the embodiments of the present invention, it is all according to
Shape and the equivalent transformation made of structure according to the present invention are within protection scope of the present invention, other not to be described in detail
Part is the prior art.
Claims (7)
1. a kind of dual wavelength test device suitable for the judgement of shock tube ignition delay time, special including a shading cabinet (9)
Sign is：The identical opto-electronic conversion mechanism (11) of two nested structures is set side by side with inside the shading cabinet (9)；
The opto-electronic conversion mechanism (11) has the optical fiber interface (1) being mounted on (9) one side box wall of shading cabinet, mounted on screening
The internal photomultiplier (6) positioned opposite with optical fiber interface (1) of ray machine case (9) and defeated for handling photomultiplier (6)
Go out the operational amplifier circuit plate (7) of voltage signal, the output terminal of the operational amplifier circuit plate (7) is provided with and can be inputted with extraneous display instrument
The connected data transmission interface (8) in end；
The opto-electronic conversion mechanism (11) also has the cross slide way being mounted between optical fiber interface (1) and photomultiplier (6)
(5), the first optical filter installation pedestal (2a) being slidably matched with it and the second optical filter peace are provided on the cross slide way (5)
Fill pedestal (2b), on the first optical filter installation pedestal (2a) successively parallel arrangement have can with photomultiplier (6) is mating makes
First spike filter (3a) and the first bandpass filter (4a) are put down successively on the second optical filter installation pedestal (2b)
Row is disposed with also can the second spike filter (3b) matching used with photomultiplier (6) and the second bandpass filter (4b)；
When the opto-electronic conversion mechanism (11) is in running order, filtered by adjusting the first optical filter installation pedestal (2a) or second
Position of the mating plate installation pedestal (2b) on cross slide way (5), makes optical fiber interface (1) and the first spike filter (3a) and first
The center line of bandpass filter (4a) is on the same line or makes optical fiber interface (1) and the second spike filter (3b)
It is on the same line with the center line of the second bandpass filter (4b), so as to meet synchro measure shock tube in same position
Or the needs of different location OH signals and CH* signals.
2. it is suitable for the dual wavelength test device of shock tube ignition delay time judgement according to claim 1, it is characterised in that：
The centre wavelength of first spike filter (3a) is 307nm, and the centre wavelength of second spike filter (3b) is
433nm。
3. it is suitable for the dual wavelength test device of shock tube ignition delay time judgement according to claim 1, it is characterised in that：
The cutoff wavelength of first bandpass filter (4a) and the second bandpass filter (4b) is 500~800nm.
4. it is suitable for the dual wavelength test device of shock tube ignition delay time judgement according to claim 1, it is characterised in that：
The response frequency of the photomultiplier (6) is 1ns.
5. it is suitable for the dual wavelength test device of shock tube ignition delay time judgement according to any one of Claims 1 to 4,
It is characterized in that：The the first optical filter installation pedestal (2a) set on the cross slide way (5) and the second optical filter installation pedestal
(2b) is in conjoined structure.
6. it is suitable for the dual wavelength test device of shock tube ignition delay time judgement according to any one of Claims 1 to 4,
It is characterized in that：It is additionally provided with that the first optical filter installation pedestal (2a) and second is controlled to filter on the cross slide way (5)
The optical filter switching mechanism (10) that piece installation pedestal (2b) is slided and positioned, the control button of the optical filter switching mechanism (10)
It is arranged on (9) one side box wall of shading cabinet.
7. it is suitable for the dual wavelength test device of shock tube ignition delay time judgement according to any one of Claims 1 to 4,
It is characterized in that：The data transmission interface (8) is on shading cabinet (9) another side box wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181597.3A CN105699306B (en) | 2016-03-28 | 2016-03-28 | Suitable for the dual wavelength test device of shock tube ignition delay time judgement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181597.3A CN105699306B (en) | 2016-03-28 | 2016-03-28 | Suitable for the dual wavelength test device of shock tube ignition delay time judgement |
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| Publication Number | Publication Date |
|---|---|
| CN105699306A CN105699306A (en) | 2016-06-22 |
| CN105699306B true CN105699306B (en) | 2018-06-22 |
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| CN201610181597.3A Active CN105699306B (en) | 2016-03-28 | 2016-03-28 | Suitable for the dual wavelength test device of shock tube ignition delay time judgement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005257472A (en) * | 2004-03-11 | 2005-09-22 | Pulstec Industrial Co Ltd | Physical quantity detection device |
| CN1940734A (en) * | 2005-09-28 | 2007-04-04 | 中国科学院自动化研究所 | Four-quadrant aligning device of mask transmission system |
| CN202589509U (en) * | 2012-06-26 | 2012-12-12 | 黑龙江大学 | Blood pressure and blood oxygen saturation degree simultaneous detection device |
| CN102930770A (en) * | 2012-10-12 | 2013-02-13 | 浙江工业大学 | Shock tube type combustible gas explosion experiment device |
| CN203376235U (en) * | 2013-07-30 | 2014-01-01 | 上海理工大学 | Device applicable to measuring concentration of PM (Particulate Matter) 2.5 on line in air purifier |
| CN205580976U (en) * | 2016-03-28 | 2016-09-14 | 武汉理工大学 | Be suitable for shock tube to catch fire dual wavelength testing arrangement that delay time judges |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020195565A1 (en) * | 2001-06-26 | 2002-12-26 | European Organization For Nuclear Research | PET scanner |
| EP2251847B1 (en) * | 2009-05-13 | 2016-02-24 | Minimax GmbH & Co KG | Device and method for detecting flames with detectors |
-
2016
- 2016-03-28 CN CN201610181597.3A patent/CN105699306B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005257472A (en) * | 2004-03-11 | 2005-09-22 | Pulstec Industrial Co Ltd | Physical quantity detection device |
| CN1940734A (en) * | 2005-09-28 | 2007-04-04 | 中国科学院自动化研究所 | Four-quadrant aligning device of mask transmission system |
| CN202589509U (en) * | 2012-06-26 | 2012-12-12 | 黑龙江大学 | Blood pressure and blood oxygen saturation degree simultaneous detection device |
| CN102930770A (en) * | 2012-10-12 | 2013-02-13 | 浙江工业大学 | Shock tube type combustible gas explosion experiment device |
| CN203376235U (en) * | 2013-07-30 | 2014-01-01 | 上海理工大学 | Device applicable to measuring concentration of PM (Particulate Matter) 2.5 on line in air purifier |
| CN205580976U (en) * | 2016-03-28 | 2016-09-14 | 武汉理工大学 | Be suitable for shock tube to catch fire dual wavelength testing arrangement that delay time judges |
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| CN105699306A (en) | 2016-06-22 |
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