CN207703708U - Minimum discharge measuring system and equipment - Google Patents
Minimum discharge measuring system and equipment Download PDFInfo
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- CN207703708U CN207703708U CN201820063234.4U CN201820063234U CN207703708U CN 207703708 U CN207703708 U CN 207703708U CN 201820063234 U CN201820063234 U CN 201820063234U CN 207703708 U CN207703708 U CN 207703708U
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- optical fiber
- light
- minimum discharge
- measuring cell
- detection light
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Abstract
The utility model provides a kind of minimum discharge measuring system, including：Light source, light source is for sending out detection light；Optical fiber, optical fiber are used for transmission and receive detection light；Gas compartment, there is measuring cell inside gas compartment, gas compartment is equipped with a light path window, light path window is equipped with the window for sealing light path window, measuring cell both sides are equipped with several speculums, and speculum is used to reflect the detection light injected in measuring cell and the detection light of reflection is got measuring cell by light path window；Collimating module, collimating module is between optical fiber and light path window in light path, collimating module includes optical alignment element, and optical alignment element is injected into measuring cell after making the detection light collimation that optical fiber projects and the detection light convergence that measuring cell internal reflection goes out is injected into optical fiber.
Description
Technical field
The utility model belongs to photoelectric detection technology field, is related to atmosphere pollution detection technique and equipment more particularly to one
Kind minimum discharge measuring system and equipment.
Background technology
As atmosphere pollution is increasingly severe, the public is higher and higher for the demand of air monitoring, in many situations
It is lower even to need to realize minimum discharge monitoring to partial contamination ingredient, therefore the monitoring lower limit of monitoring device is detection device performance
An important indicator.
According to Bill's-Lang Bo laws, the light path phase of the Monitoring lower-cut of optoelectronic detecting device with detection light under test gas
Closing property is very high, and light path is longer, and the Monitoring lower-cut of detection device is lower.
The gas compartment of existing detection device, measuring cell are generally divided to two classes：One kind is one way light path design, i.e., detection light from
Measuring cell one end is sent out, and is received by the other end optical receiver of measuring cell, to increase the length of light path, needs to increase gas compartment
Volume either the volume of length gas compartment or length increase necessarily affect the aesthetics and portability of equipment, therefore equipment
Manufacturer tends not to improve the length or volume that the Monitoring lower-cut of equipment removes gas compartment in increase equipment.It is another kind of to be
Based on the design in White pond, i.e., using at least two paraboloid eyeglasses come roundtrip detection light in gas compartment, to increase inspection
Effective detection light path of light is surveyed, multiple paraboloid eyeglasses are utilized in the design in White pond, and manufacturing cost is high, while adjusting difficulty
Spend larger, in addition, in the design in White pond, paraboloid eyeglass is in direct contact under test gas, is easy contaminated corrosion, long
It needs to be replaced regularly after time use to ensure accuracy of detection, so again so that the cost of detection substantially increases.
There are also design, two slides of setting are attempted in gas compartment to completely cut off under test gas and paraboloid eyeglass, from
And the problem of preventing under test gas from polluting paraboloid eyeglass, still, detection light can lose many energy when across slide,
In long light path detection, so that optical receiver is received effective detection light is also a difficult point, and in above-mentioned design, detection light exists
Back and forth through slide in gas compartment, the energy dissipation of detection light is serious, and the detection light for finally entering optical receiver often reaches not
The standard responded to optical receiver.
Utility model content
The utility model proposes a kind of manufacturing cost is low, accuracy of detection it is high be suitable for detecting low concentration pollution gas
Minimum discharge measuring system and equipment.
The purpose of this utility model can be realized by following technical proposal：
A kind of minimum discharge measuring system, including：
Light source, the light source is for sending out detection light；
Optical fiber, the optical fiber are used for transmission and receive the detection light；
There is measuring cell, the gas compartment to be equipped with a light path window, the light path window for gas compartment, the gas compartment inside
Mouth is equipped with the window for sealing the light path window, and the measuring cell both sides are equipped with several speculums, and the speculum is used
In the detection light in reflection injection measuring cell and the detection light of reflection is got into the measuring cell by the light path window；
Collimating module, the collimating module is between optical fiber and light path window in light path, the collimating module packet
Optical alignment element is included, the optical alignment element is injected into measuring cell and will measure after making the detection light collimation that optical fiber projects
The detection light convergence that pond internal reflection goes out is injected into the optical fiber.
Preferably, the optical alignment element is off axis paraboloidal mirror.
Preferably, the optical alignment element is convex lens.
Preferably, the optical fiber, which includes one, imports optical fiber and an export optical fiber, the importing optical fiber is used for transmission
The detection light that light source is sent out, the export optical fiber are used for transmission the reflected light after the convergence of optical alignment element.
Preferably, there are one introducing prong, one to draw prong and a public end for the optical fiber tool, what light source was sent out
Detection light is entered optical fiber by introducing prong and is transmitted by the public end, and the detection light backtracking that measuring cell reflects is by described
It is exported by extraction prong after public end transmission.
Preferably, the light source is ultraviolet source, the window is ultraviolet fused quartz window.
Preferably, the light source is visible light source.
Preferably, backtracking gets the measuring cell after the detection light is reflected via speculum.
Preferably, after the detection light emits via transmitting mirror, reflection light is parallel with incident ray.
A kind of minimum discharge measuring apparatus, the minimum discharge measuring apparatus have any survey of claim 1 to 9
Amount system, and：
Spectrometer；
Reflected light that the spectrometer reception optical fiber is transmitted out is simultaneously analyzed.
Preferably, the collimating module includes a box body with opening, optical alignment element is installed in box body, light
Fibre is fixed on box body, and box body is fixed on the wall surface on gas compartment and on side wall and gas compartment with opening where light path window
It is close to seal so that the detection light that optical fiber transmission is sent out passes through opening and light path window to be injected into after optical alignment element collimation
In measuring cell.
Preferably, the gas compartment tool is there are one closed installation pond, installation pond is connected by light path window and measuring cell
Logical, optical alignment element is installed in installation pond, and a transmitting terminal of optical fiber is extend into installation pond.
Compared with prior art, the utility model has following technological merit：
In the utility model, the optical alignments element such as off axis paraboloidal mirror is provided in outside measuring cell, thus is avoided that
Optical alignment element is polluted by under test gas in measuring cell so that expensive optical alignment element has longer use
Service life.It uses several speculums in measuring cell to reflect detection light, detection light is anti-by speculum in measuring cell
It is projected by former entrance port i.e. light path window after penetrating, the light path of detection light is reciprocation type in measuring cell, compared to same size
Commonly used speculum measuring cell, the length of light path increases one times, and the precision of measurement greatly improves.
Description of the drawings
Fig. 1 is the structural schematic diagram of minimum discharge gas measurement system；
Fig. 2 is an example structure figure of minimum discharge gas measurement system；
Fig. 3 is another example structure figure of minimum discharge gas measurement system；
Fig. 4 is the another example structure figure of minimum discharge gas measurement system；
Fig. 5 is an example structure figure of minimum discharge measuring apparatus；
Fig. 6 is the another example structure figure of minimum discharge measuring apparatus.
Specific implementation mode
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, the utility model provides a kind of minimum discharge gas measurement system, for detecting in atmosphere pollution
The lower pollutant component of concentration, including light source 50, optical fiber 10, gas compartment 30 and collimating module.Light source 50 is for sending out detection
Light, light source 50 can be ultraviolet source 50 or visible light source 50, and optical fiber 10 is used for coupled transfer detection light, inside gas compartment 30
With a measuring cell 31, measuring cell 31 is for accommodating under test gas.One and only one light path window is opened up on gas compartment 30,
Light path window is connected to outside measuring cell 31 and gas compartment 30, and detection light can be injected into measuring cell 31 by light path window to measuring
Under test gas in pond 31 is detected.Window is provided on light path window, window is prevented for being sealed to light path window
Gas in measuring cell 31 is escaped from light path window, it is to be herein pointed out when light source 50 is ultraviolet source 50, window needs
It is ultraviolet fused quartz window, when ultraviolet light is by ultraviolet fused quartz window, energy loss is smaller.
Collimating module includes optical alignment element, and optical alignment element is used to carry out the detection light that optical fiber 10 projects accurate
Directly, so that it is changed into parallel rays, under test gas is detected in order to design light path.
The both sides of measuring cell 31 are provided with several speculums 40, what the particular number of speculum 40 can be needed for detection
Optical path length and measuring cell 31 length of itself are designed, and do not do specific requirement here.
Detection light is sent out by light source 50, after the transmission of optical fiber 10, is collimated by optical alignment element, flat after collimation
Row light is injected by light path window in measuring cell 31, is penetrated by same light path window after being reflected by the speculum 40 in measuring cell 31
Go out, is injected into optical fiber 10 and is transmitted after optical alignment element reversely convergence.
On the one hand, optical alignment element is arranged in the outside of measuring cell 31, will not directly with the gas to be measured in measuring cell 31
The problem of body contacts, and there is no contaminated corrosion subtracts so need not carry out ensureing its accuracy of detection with bringing after being used for a long time
The small use cost of long term monitoring.
On the one hand, it is projected, is compared by light path window again after the reflection of speculum 40 after detection light is injected by light path window
In common measuring cell, effectively detects light path and increase one times, do not increasing manufacturing cost, do not significantly alterring gas compartment 30
The requirement of minimum discharge monitoring can be met under the premise of volume and length.
Convex lens, which may be used, in optical alignment element can also use off axis paraboloidal mirror 20, preferably use off-axis parabolic
Face mirror 20, off axis paraboloidal mirror 20 collimate detection light and are lost during detection light collimation or convergence when either being converged
Ability smaller.
As shown in Fig. 2, in some embodiments, optical fiber 10 includes one and imports optical fiber 11 and an export optical fiber 12, institute
It states importing optical fiber 11 and is used for transmission the detection light that light source 50 is sent out, the export optical fiber 12 is used for transmission the convergence of optical alignment element
Reflected light afterwards.In the present embodiment, detection light enters measuring cell 31 after the reflection of speculum 40, reflection light and incident light
Line is parallel, and incident ray is sent out by the transmission of importing optical fiber 11, and reflection light is after the convergence of optical alignment element by exporting
Optical fiber 12 receives.
As shown in figure 3, in some embodiments, there are one introduce prong 13, an extraction prong 14 and one for the tool of optical fiber 10
A public end 15, the detection light that light source 50 projects is coupled into optical fiber 10 by introducing prong 13, and is sent out via public end 15, examines
Light is surveyed to inject after optical alignment element collimation in measuring cell 31 by extending into along light path backtracking after the reflection of speculum 40
It is exported in 10 public end 14 of optical fiber and by the extraction prong 14 of optical fiber 10.
With reference to figure 4, an embodiment of the utility model is shown, the light path design of the present embodiment amounts to complete in measuring cell
Round-trip at eight times, in the present embodiment, the speculum M1 width of measuring cell wherein side is other side speculum M2 width
Twice or more, detection light amounts on M1 to be reflected four times, i.e. the speculum M1 of the wider width is equivalent to two pieces and parallel sets
The speculum for the common width set, in this way, when adjusting light path, as long as adjusting two pieces of speculum M2 of the other side,
Reduce the difficulty of optical path adjusting.
The utility model additionally provides a kind of minimum discharge measuring apparatus, which has above-mentioned minimum discharge measuring system
And a spectrometer 60, the detection light that 60 reception optical fiber 10 of spectrometer transfers out is to handle data.
With reference to figure 5, Fig. 5 shows one embodiment of above-mentioned minimum discharge measuring apparatus, and in this embodiment, optics is accurate
Straight module includes a box body with opening, and optical alignment element is installed in box body, and optical fiber 10 is fixed on box body, and box body is solid
It is scheduled on gas compartment 30 and the side wall with opening is close to sealing with the wall surface where light path window on gas compartment 30 so that optical fiber
The detection light that 10 transmission are sent out passes through opening and light path window to be injected into measuring cell 31 after optical alignment element collimation.Box body
Effect on the one hand be easy for that fixed optical fiber 10 and optical alignment element are installed, on the other hand optical alignment element can also be consolidated
It is scheduled in a closed space, optical alignment element can be effectively protected.
Fig. 6 shows another embodiment of above-mentioned minimum discharge measuring apparatus, in the embodiment, is provided on gas compartment 30
One is installed pond to replace box body, installation pond to have identical effect with box body, installs pond and measuring cell 31 is connected by light path window
Logical, optical alignment element is installed in installation pond, and a transmitting terminal of optical fiber 10 is extend into installation pond.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (12)
1. a kind of minimum discharge measuring system, which is characterized in that including：
Light source, the light source is for sending out detection light；
Optical fiber, the optical fiber are used for transmission and receive the detection light；
Gas compartment, has measuring cell inside the gas compartment, and the gas compartment is equipped with a light path window, on the light path window
Equipped with the window for sealing the light path window, the measuring cell both sides are equipped with several speculums, and the speculum is for anti-
Inject measuring cell in detection light and the detection light of reflection is got into the measuring cell by the light path window；
Collimating module, for the collimating module between optical fiber and light path window in light path, the collimating module includes light
Collimating element is learned, the optical alignment element is injected into measuring cell after making the detection light collimation that optical fiber projects and will be in measuring cell
The detection light convergence reflected is injected into the optical fiber.
2. minimum discharge measuring system according to claim 1, which is characterized in that the optical alignment element is off-axis throws
Object plane mirror.
3. minimum discharge measuring system according to claim 1, which is characterized in that the optical alignment element is convex lens
Mirror.
4. minimum discharge measuring system according to claim 1,2 or 3, which is characterized in that the optical fiber is led including one
Enter optical fiber and an export optical fiber, the importing optical fiber is used for transmission the detection light that light source is sent out, and the export optical fiber is for passing
Lose the reflected light after learning collimating element convergence.
5. minimum discharge measuring system according to claim 1,2 or 3, which is characterized in that there are two forks for the optical fiber tool
Foot and a public end, the detection light that light source is sent out are entered optical fiber by one of prong and are transmitted by the public end, measured
The detection light backtracking that pond reflects after the public end transmission by another prong by being exported.
6. minimum discharge measuring system according to claim 1, which is characterized in that the light source is ultraviolet source, described
Window is ultraviolet fused quartz window.
7. minimum discharge measuring system according to claim 1, which is characterized in that the light source is visible light source.
8. minimum discharge measuring system according to claim 1, which is characterized in that the detection light is reflected via speculum
Backtracking gets the measuring cell afterwards.
9. minimum discharge measuring system according to claim 1, which is characterized in that the detection light emits via transmitting mirror
Afterwards, reflection light is parallel with incident ray.
10. a kind of minimum discharge measuring apparatus, which is characterized in that the minimum discharge measuring apparatus has claim 1 to 9 times
Measuring system described in one, and：
Spectrometer；
Reflected light that the spectrometer reception optical fiber is transmitted out is simultaneously analyzed.
11. minimum discharge measuring apparatus according to claim 10, which is characterized in that the collimating module has including one
The box body of opening, optical alignment element are installed in box body, and optical fiber is fixed on box body, and box body is fixed on gas compartment and carries
The side wall of opening is close to seal with the wall surface where light path window on gas compartment so that the detection light of optical fiber transmission submitting is through optics
Opening and light path window is passed through to be injected into measuring cell after collimating element collimation.
12. minimum discharge measuring apparatus according to claim 10, which is characterized in that there are one closings for the gas compartment tool
Installation pond, installation pond be connected to measuring cell by light path window, optical alignment element be installed in installs pond in, one of optical fiber
Transmitting terminal is extend into installation pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820063234.4U CN207703708U (en) | 2018-01-15 | 2018-01-15 | Minimum discharge measuring system and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820063234.4U CN207703708U (en) | 2018-01-15 | 2018-01-15 | Minimum discharge measuring system and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207703708U true CN207703708U (en) | 2018-08-07 |
Family
ID=63035215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820063234.4U Expired - Fee Related CN207703708U (en) | 2018-01-15 | 2018-01-15 | Minimum discharge measuring system and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207703708U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169143A (en) * | 2018-01-15 | 2018-06-15 | 杭州春来科技有限公司 | Minimum discharge measuring system and equipment |
| CN110726682A (en) * | 2019-09-26 | 2020-01-24 | 山东大学 | In-situ online reflection optical measurement system and method |
| CN114136884A (en) * | 2021-11-23 | 2022-03-04 | 杭州谱育科技发展有限公司 | Device and method for detecting radioactive elements |
-
2018
- 2018-01-15 CN CN201820063234.4U patent/CN207703708U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169143A (en) * | 2018-01-15 | 2018-06-15 | 杭州春来科技有限公司 | Minimum discharge measuring system and equipment |
| CN110726682A (en) * | 2019-09-26 | 2020-01-24 | 山东大学 | In-situ online reflection optical measurement system and method |
| CN114136884A (en) * | 2021-11-23 | 2022-03-04 | 杭州谱育科技发展有限公司 | Device and method for detecting radioactive elements |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 Termination date: 20220115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |