CN109342323A - A kind of device and method eliminated extraneous vibration and photoacoustic cell is interfered - Google Patents
A kind of device and method eliminated extraneous vibration and photoacoustic cell is interfered Download PDFInfo
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- CN109342323A CN109342323A CN201811338401.2A CN201811338401A CN109342323A CN 109342323 A CN109342323 A CN 109342323A CN 201811338401 A CN201811338401 A CN 201811338401A CN 109342323 A CN109342323 A CN 109342323A
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- elastic element
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- concave groove
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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
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The present invention relates to a kind of device and method that elimination extraneous vibration interferes photoacoustic cell.Described device includes concave groove, panel, the first elastic element, the second elastic element, third elastic element；One end of first elastic element is fixed on the bottom plate of concave groove, and vertical with bottom plate, and the other end is connect with panel, and panel is located in concave groove, and parallel with bottom plate；Second elastic element and third elastic element are respectively positioned on above panel and and panel parallel, are mutually perpendicular between the second elastic element and third elastic element；One end of second elastic element is fixedly connected on the inner wall of concave groove, and the other end is connect with the first positioning bushing being arranged on panel；One end of third elastic element is fixedly connected on the inner wall of concave groove, and the other end is connect with the second positioning bushing being arranged on panel.By adjusting the pretightning force of each elastic device, so that device keeps mechanics equilibrium state, interference of the extraneous vibration to detection signal is offset.
Description
Technical field
The present invention relates to means for anti-jamming fields, and in particular to it is a kind of eliminate device that extraneous vibration interferes photoacoustic cell and
Method.
Background technique
Optoacoustic effect refers to, using the modulated monochromatic light exposure of a beam intensity to being sealed on the sample in photoacoustic cell,
Sample absorbs luminous energy, and the de excitation in a manner of discharging thermal energy, and the thermal energy of release makes sample and surrounding medium by the modulation frequency of light
Rate generates periodic heat, and then medium is caused to generate periodic pressure oscillation.This pressure oscillation can with acoustic sensor into
Row detection, such as sensitive microphone or piezoelectric ceramic microphone are detected, and obtain photoacoustic signal by amplification.
Optoacoustic spectroscopy is a kind of novel spectrum analysis detection technique based on optoacoustic effect.Optoacoustic spectroscopy skill
The not direct measure spectrum of art itself, but by detection substance absorb radiation after thermal excitation sound wave come obtain spectrum letter
Breath.
Photo-acoustic spectrometer based on above-mentioned optoacoustic spectroscopy is suitable for the measurement of low concentration sample.Wherein, photoacoustic cell is made
It is both the container of gaseous sample and the supporting body of acoustic sensor for the core component in photo-acoustic spectrometer.In optoacoustic spectroscopy
In the work operational process of instrument, extraneous vibration can generate sound wave, the detection signal in sound wave meeting interference effect photoacoustic cell, especially
The sound wave for being and detecting signal same frequency, the influence to testing result is more very.
Summary of the invention
In view of problems of the prior art, the present invention is intended to provide a kind of means for anti-jamming, can be applied to optoacoustic
Interference of the extraneous vibration to photoacoustic cell detection signal is eliminated in spectral technique.
The present invention provides a kind of devices that elimination extraneous vibration interferes photoacoustic cell, and described device includes concave groove, face
Plate, the first elastic element, the second elastic element, third elastic element；
One end of first elastic element is fixed on the bottom plate of the concave groove, and vertical with the bottom plate, described
The other end of first elastic element is connect with the panel, and the panel is located in the concave groove, and parallel with the bottom plate；
Second elastic element and the third elastic element with the panel parallel, second elastic element and
It is mutually perpendicular between the third elastic element；
One end of second elastic element is fixedly connected on the inner wall of the concave groove, and the other end is with setting described
The first positioning bushing connection on panel；
One end of the third elastic element is fixedly connected on the inner wall of the concave groove, and the other end is with setting described
The second positioning bushing connection on panel.
As the optional embodiment of the present invention, first elastic element, the second elastic element, third elastic element are equal
For spring.
As the optional embodiment of the present invention, first elastic element, the second elastic element, third elastic element are equal
Be provided with it is multiple so that the panel is in mechanical balance state.
As the optional embodiment of the present invention, second elastic element and the third elastic element are positioned at described recessed
Four edges of type groove.
Further, second elastic element and described have been arranged in pairs in each edge of the concave groove
Three elastic elements.
As the optional embodiment of the present invention, passes through before first elastic element and the panel and adjust screw company
It connects.
As the optional embodiment of the present invention, pass through tune between second elastic element and the first positioning bushing
Save screw connection.
As the optional embodiment of the present invention, pass through tune between the third spring arrangement and the second positioning bushing
Save screw connection.
The invention also provides a kind of systems that elimination extraneous vibration interferes photoacoustic cell, and the system comprises above-mentioned to disappear
Device, photoacoustic cell, the vibration signal acquisition device that photoacoustic cell is interfered except extraneous vibration, the photoacoustic cell and the vibration signal
Acquisition device is placed on the panel.
The present invention proposes a kind of method eliminating extraneous vibration using above-mentioned system and interfering photoacoustic cell simultaneously, when
When the system is interfered by extraneous vibration, by adjusting first elastic element, the second elastic element, third elasticity member
Part offsets interference of the extraneous vibration to signal is detected in the photoacoustic cell so that the system reaches the state of mechanical balance.
It is proposed by the present invention to eliminate in the device that extraneous vibration interferes photoacoustic cell, pass through setting suitable number and position
The elastic device set leads to so that means for anti-jamming is able to maintain in mechanical balance state, and in the interference by extraneous vibration
The pretightning force of adjustment elastic device is crossed to keep the mechanical balance state of means for anti-jamming, when the objects such as placement photoacoustic cell on the device
When part, it will be able to offset interference of the extraneous vibration to photoacoustic cell acoustic signals by adjusting elastic device.
The system that elimination extraneous vibration of the invention interferes photoacoustic cell can be applied to the online monitoring instruments in cabinet
In, effectively improve the accuracy of monitoring result.
Detailed description of the invention
Fig. 1 is a kind of apparatus structure schematic diagram eliminating extraneous vibration and interfering photoacoustic cell provided by the invention.
Fig. 2 is the diagrammatic cross-section in the section C-C in Fig. 1.
Specific embodiment
Below in conjunction with drawings and examples, a specific embodiment of the invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
It applies example to be for illustrative purposes only, rather than limiting the invention.
Present invention firstly provides a kind of devices that can be eliminated extraneous vibration and interfere photoacoustic cell, also cry in the present invention
Make means for anti-jamming.As shown in Figure 1, means for anti-jamming of the invention includes concave groove 1, panel 2, the first elastic element 31,
Two elastic elements 32, third elastic element 33.Fig. 1 is the signal of means for anti-jamming shown in one embodiment of the present invention
Scheme, the first elastic element 31, the second elastic element 32, the position of third elastic element 33 and quantity do not have to limit and make in figure
With can be adjusted according to actual needs in different embodiments of the invention, so as to be able to maintain mechanics flat for panel 2
The state of weighing apparatus.
As shown in Fig. 2, for the diagrammatic cross-section in the section C-C in Fig. 1.In conjunction with Fig. 2 as can be seen that in the present invention, the first bullet
One end of property element 31 is fixedly connected on the bottom plate of concave groove 1.Also, it is mutually perpendicular between the first elastic element 31 and bottom plate
Setting.The other end of first elastic element 31 is connect with panel 2, also, panel 2 is located in concave groove 1, panel 2 and concave groove 1
Bottom plate between be parallel.
Optionally, the first elastic element 31 selects spring in the present invention.It, can also root in different embodiments of the invention
According to actual needs, different elastic elements is selected.
Further, the first elastic element 31 selects conical compression spring, and the section of conical compression spring is thicker
One end is connect with the bottom plate of concave groove 1.
Optionally, connection is realized by adjusting screw 6 between the first elastic element 31 and panel 2.In turn, by adjusting tune
The tightness of screw 6 is saved, realize the compression of the first elastic element 31 or is loosened.
As shown in Fig. 1 and Fig. 2, the second elastic element 32 and third elastic element 33 are parallel with panel 2.Also, second
It is mutually perpendicular between elastic element 32 and third elastic element 33.Optionally, the second elastic element 32 and third elastic element 33
It is respectively positioned on the top of panel 2, in order to adjust the pretightning force of the second elastic element 32 and third elastic element 33.
By Fig. 2, one end of the second elastic element 32 is fixedly connected on the inner wall of concave groove 1, and the other end and setting are in face
The first positioning bushing 4 on plate 2 connects, and then realizes the connection between the second elastic element 32 and panel 2.Wherein, first is fixed
It is vertical between the position and the bottom plate of concave groove 1 of position bushing 4.
Optionally, it is attached between the second elastic element 32 and the first positioning bushing 4 by adjusting screw 6, so that logical
The tightness that adjustment adjusts screw 6 is crossed, realizes the stretching or shortening of the second elastic element 32.
Optionally, be additionally provided with gasket 5 between the second elastic element 32 and the first positioning bushing 4, by adjust screw 6 according to
It is secondary that second elastic element 32, gasket 5, first are positioned bushing 4 and be fixed on panel 2, realize the second elastic element 32 and panel 2
Connection.The setting of gasket 5 is so that be fixedly connected with more firm hold between the second elastic element 32 and the first positioning bushing 4
Long.
Further, one end of third elastic element 33 is fixedly connected on the inner wall of concave groove 1, and the other end and setting exist
The second positioning bushing connection on panel 2.Connection type and second in the present invention, between third elastic element 33 and panel 2
Connection type between elastic element 32 and panel 2 is identical, and details are not described herein.
Optionally, in the present invention, the second elastic element 32 and third elastic element 33 select spring.It is of the invention not
With in embodiment, can also difference according to actual needs, select different types of elastic element.
Further, the second elastic element 32 and third elastic element 33 select extension spring.
Means for anti-jamming provided by the invention is needed when for eliminating interference of the extraneous vibration to photoacoustic cell
The objects such as photoacoustic cell are placed on panel 2, at this time, it may be necessary to which multiple first elastic elements 31, the second elastic element 32 and third is arranged
Elastic element 33, so that panel 2 is in the state of mechanical balance.Further, it is possible to according to the weight for the object placed on panel 2
With the difference of position etc., to the position of the first elastic element 31, the second elastic element 32 and third elastic element 33, quantity, strong
Degree is adjusted.
Optionally, in order to keep the equilibrium state on panel 2 in each zonule first, the first elastic element 31 is set in pairs
It sets.
Further, the second elastic element 32 and third elastic element 33 are arranged in four edges of concave groove 1.More
Further, in order to preferably keep the equilibrium state of panel 2, the second elasticity is provided in the edge of each concave groove 1
Element 32 and third elastic element 33, the second elastic element 32 and third elastic element 33 are arranged in pairs.
On the other hand, the invention also provides a kind of system that elimination extraneous vibration interferes photoacoustic cell, which includes
Above-mentioned means for anti-jamming, photoacoustic cell, vibration signal acquisition device, photoacoustic cell and vibration signal acquisition device are placed in anti-interference dress
On the panel set.
As a kind of application of present system, due in cabinet vibration frequency type and numerical value be it is stable, incite somebody to action this
The system of invention is applied to the online monitoring instruments in cabinet, can preferably improve the accuracy of monitoring result.
The method that extraneous vibration interferes photoacoustic cell is eliminated using above system secondly, the invention also provides a kind of,
The course of work are as follows:
Pedestal and supporter of the concave groove 1 as entire means for anti-jamming in means for anti-jamming, concave groove 1 itself are being
Vibration will not be generated in system, be the medium that system is used to receive extraneous vibration.
Above-mentioned system is placed on vibration experiment table, vibration experiment table does not vibrate first, i.e., without extraneous vibration when, pass through
Vibration signal acquisition device obtains photoacoustic cell acoustic signals.
Then, vibration experiment table is applied and is vibrated, after concave groove 1 receives extraneous vibration, pass through the first elastic element 31, the
Two elastic elements 32, third elastic element 33 are transmitted on panel 2, and then are acted on and be placed on the photoacoustic cell on panel 2, so that
Photoacoustic cell vibration, and then just will affect the optoacoustic effect of sample in photoacoustic cell, detection signal is interfered.
At this point, realize the compression of the first elastic element 31 by the tightness for adjusting screw 6 or loosen, and
The stretching or shortening of second elastic element 32 and third elastic element 33, so that system reaches the state of mechanical balance, to support
Disappear interference of the extraneous vibration to signal is detected in photoacoustic cell, makes to detect acoustic signals numerical value when signal reaches state without friction.
Finally, it should be noted that obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Other various forms of variations or variation out.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations that Shen goes out are still in the protection scope of this invention.
Claims (10)
1. a kind of eliminate the device that interferes photoacoustic cell of extraneous vibration, which is characterized in that described device include concave groove, panel,
First elastic element, the second elastic element, third elastic element；
One end of first elastic element is fixed on the bottom plate of the concave groove, and vertical with the bottom plate, and described first
The other end of elastic element is connect with the panel, and the panel is located in the concave groove, and parallel with the bottom plate；
Second elastic element and the third elastic element with the panel parallel, second elastic element and described
It is mutually perpendicular between third elastic element；
One end of second elastic element is fixedly connected on the inner wall of the concave groove, and the other end and setting are in the panel
On first positioning bushing connection；
One end of the third elastic element is fixedly connected on the inner wall of the concave groove, and the other end and setting are in the panel
On second positioning bushing connection.
2. the device according to claim 1 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that first bullet
Property element, the second elastic element, third elastic element are spring.
3. the device according to claim 1 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that first bullet
Property element, the second elastic element, third elastic element be provided with it is multiple so that the panel is in mechanical balance state.
4. the device according to claim 3 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that second bullet
Property element and the third elastic element are located at four edges of the concave groove.
5. the device according to claim 4 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that in the concave
Each edge of slot has been arranged in pairs second elastic element and the third elastic element.
6. the device according to claim 1 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that first bullet
Property element and the panel before pass through adjust screw connect.
7. the device according to claim 1 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that second bullet
Property element and it is described first positioning bushing between by adjust screw connection.
8. the device according to claim 1 eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that the third bullet
By adjusting screw connection between spring device and the second positioning bushing.
9. a kind of system eliminating extraneous vibration and interfering photoacoustic cell, which is characterized in that the system comprises claim 1-8 to appoint
Device, photoacoustic cell, the vibration signal acquisition device that elimination extraneous vibration interferes photoacoustic cell described in one, the photoacoustic cell and institute
Vibration signal acquisition device is stated to be placed on the panel.
10. a kind of method being eliminated extraneous vibration using system as claimed in claim 9 and being interfered photoacoustic cell, feature are existed
In when the system is interfered by extraneous vibration, by adjusting first elastic element, the second elastic element, third bullet
Property element offset extraneous vibration and do to detecting signal in the photoacoustic cell so that the system reaches the state of mechanical balance
It disturbs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338401.2A CN109342323B (en) | 2018-11-12 | 2018-11-12 | Device and method for eliminating interference of external vibration on photoacoustic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338401.2A CN109342323B (en) | 2018-11-12 | 2018-11-12 | Device and method for eliminating interference of external vibration on photoacoustic cell |
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| Publication Number | Publication Date |
|---|---|
| CN109342323A true CN109342323A (en) | 2019-02-15 |
| CN109342323B CN109342323B (en) | 2021-07-06 |
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| CN201811338401.2A Active CN109342323B (en) | 2018-11-12 | 2018-11-12 | Device and method for eliminating interference of external vibration on photoacoustic cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115656040A (en) * | 2022-10-11 | 2023-01-31 | 国网湖北省电力有限公司电力科学研究院 | Anti-vibration SF6 gas decomposition product detection device |
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| CN109342323B (en) | 2021-07-06 |
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