CN204924923U - Measurement mode switch device of linear light journey DOAS gas analysis appearance - Google Patents
Measurement mode switch device of linear light journey DOAS gas analysis appearance Download PDFInfo
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- CN204924923U CN204924923U CN201520565392.6U CN201520565392U CN204924923U CN 204924923 U CN204924923 U CN 204924923U CN 201520565392 U CN201520565392 U CN 201520565392U CN 204924923 U CN204924923 U CN 204924923U
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Abstract
The utility model discloses a measurement mode switch device of linear light journey DOAS gas analysis appearance, including a cover section of thick bamboo, cover section of thick bamboo front end nozzle is connected with a switching section of thick bamboo, the pivot is installed to cover section of thick bamboo internal rotation, still be provided with the diaphragm in the cover section of thick bamboo, the diaphragm is including big, small circle shape blackout aluminum plate, open its vertical diameter lower extreme position of big circular blackout aluminum plate has flexible hole, small circle shape blackout aluminum plate set up in the big circular flexible hole of blackout aluminum plate, small circle shape blackout aluminum plate and big circular blackout aluminum plate mutually perpendicular, greatly, small circle shape blackout aluminum plate fixes jointly and rotates along with the pivot in the pivot, two -dimentional adjusting mount is installed to the bottom rear end in the cover section of thick bamboo, install the corner reflection mirror on the two dimension adjusting mount, cover bobbin base portion installs motor control module, the motor is connected with the transmission of pivot lower extreme among the motor control module. The utility model discloses compact structure, convenient to use, positional accuracy is high, has improved the detectivity of instrument simultaneously greatly.
Description
Technical field
The utility model relates to gas analyzer field, specifically a kind of measurement pattern switching device shifter of long light path DOAS gas analyzer.
Background technology
Environmental pollution is the problem that people extremely pay close attention to, and the monitoring carrying out environmental contaminants is administered very necessary for environmental protection, Environmental capacity.Differential Optical Absorption Spectroscopy (DOAS) is the technology of poisonous trace gas in a kind of effective measurement air, and its principle of work realizes measuring the quantitative and qualitative analysis of object gas in the characteristic absorption of ultraviolet band based on gas to be measured.Long light path DOAS analyser is then the successful Application of DOAS technology, its primarily of analyser, optical system, software etc. three part composition, wherein optical system is based on the Cassegrain telescope of transceiver.Analyser has two kinds of patterns: monitoring pattern and calibration mode.Monitoring pattern is the pollutant for surveying in ambient atmosphere, and calibration mode is then demarcation or inspection for carrying out gas to instrument, and the background signal (namely not through the spectral signal of pollutant absorption) of instrument is also obtain in the calibration mode.
There is following problem in existing mode-changeover device: 1 light path switch mode is comparatively simple, and stop position is easily departed from, and optical path adjusting is relatively complicated.The light path consistance of 2 monitoring patterns and calibration mode is poor, causes optical noise bigger than normal, and namely optical system error is comparatively large, thus causes the monitoring sensitivity of instrument to be restricted.
utility model contentthe purpose of this utility model is to provide a kind of measurement pattern switching device shifter of long light path DOAS gas analyzer, the problem of the problem that prior art mode-changeover device optical path adjusting is complicated to solve, consistance is poor.
In order to achieve the above object, the technical scheme that the utility model adopts is:
The measurement pattern switching device shifter of long light path DOAS gas analyzer, it is characterized in that: include the horizontally disposed cover cylinder of central axis, cover cylinder front end nozzle is coaxially connected with switching cylinder, the rotating shaft that central axis is vertically arranged is rotatablely equipped with in cover cylinder, and the central axis of rotating shaft and cover cylinder central axis orthogonal vertical, also diaphragm is provided with in cover cylinder, it is greatly horizontally disposed respectively that diaphragm comprises central axis, small circular blackout aluminium sheet, large its vertical diameter lower end position of circle blackout aluminium sheet has round tube hole, small circular blackout aluminium sheet is arranged in large circular blackout aluminium sheet round tube hole, small circular blackout aluminium sheet overlaps with the large circular vertical diameter of aluminium sheet that turns black, and small circular blackout aluminium sheet is mutually vertical with the large circular aluminium sheet that turns black, greatly, small circular blackout aluminium sheet is fixed in rotating shaft with axis of rotation jointly by vertical straight path position, described cover cylinder inner bottom part rear end is provided with two-dimension adjustment frame, two-dimension adjustment frame is provided with corner reflector, and when large circular blackout aluminium sheet is with the extremely large circular blackout aluminium sheet central axis of axis of rotation and cover cylinder centerline axis parallel, corner reflector is in coaxial state with round tube hole on the large circular aluminium sheet that turns black, bottom described cover cylinder, motor control module is installed, motor is provided with in motor control module, and motor and rotating shaft lower end are in transmission connection.
The measurement pattern switching device shifter of described long light path DOAS gas analyzer, is characterized in that: described switching cylinder front end connects DOAS analyser Cassegrain telescope, and is shaped to stepped hole in switching cylinder front end, installs window in stepped hole.
The measurement pattern switching device shifter of described long light path DOAS gas analyzer, it is characterized in that: described motor control module is made up of motor, two optocouplers, axle union, rotating shaft and fixed sturctures, the rotating shaft of fixed aperture is fixing with in axle union, when motor belt motor moving axis union is rotated, rotating shaft drives diaphragm to rotate with axle union, block optocoupler, realize location.
The measurement pattern switching device shifter of described long light path DOAS gas analyzer, is characterized in that: the motor in described motor control module is controlled by outside embedded system.
The measurement pattern switching device shifter of described long light path DOAS gas analyzer, it is characterized in that: the corner reflector stationary cylinder described two-dimension adjustment frame being provided with nylon material, corner reflector stationary cylinder central axis is horizontally disposed with, rotate between corner reflector stationary cylinder back-end central and two-dimension adjustment frame and be provided with steel ball, and corner reflector stationary cylinder rear end is fixed on two-dimension adjustment frame by the screw of three distributions in isosceles triangle, realizes the adjustment of corner reflection by turning different screws; Corner reflector stationary cylinder front end is set to nozzle and towards large circular blackout aluminium sheet, corner reflector is coaxially arranged in corner reflector stationary cylinder, the front end that corner reflector is positioned at corner reflector stationary cylinder nozzle is plane, corner reflector rear end faceted pebble stretches in corner reflector stationary cylinder, be provided with the trim ring compressing corner reflector in the nozzle of corner reflector stationary cylinder front end, and between trim ring and corner reflector, be provided with O shape circle.
The utility model is made up of cylinder of transferring, diaphragm, motor control module, cover cylinder, corner reflector, two-dimension adjustment frame etc.Motor control module rotates after receiving corresponding steering order, and drive diaphragm to rotate, diaphragm then stops operating after arriving the position required simultaneously.Diaphragm is made up of the black aluminium sheet that two sides is vertical, and the position of diaphragm is positioned by optocoupler, and position control accuracy is high.Change the reflection angle of corner reflector by two-dimension adjustment frame, thus carry out the adjustment of analyser light path.According to the monitoring requirements of DOAS analyser, diaphragm carries out the switching of diverse location, realizes the automatic switchover of calibration and monitoring pattern.
Do corresponding rotation by the steering order accepting analyser during the rotation of the utility model diaphragm, enter calibration mode or monitoring pattern, and determine the position that stops according to the registration of optocoupler.The utility model compact conformation, easy to use, position accuracy is high, substantially increases the detection sensitivity of instrument simultaneously.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model mechanism of diaphragm front elevation.
Fig. 3 is the utility model mechanism of diaphragm side view.
Fig. 4 is that the utility model is in monitoring pattern schematic diagram when being connected with DOAS analyser Cassegrain telescope.
Fig. 5 is that the utility model is in calibration mode schematic diagram when being connected with DOAS analyser Cassegrain telescope.
Fig. 6 is the cut-open view of the utility model motor control module.
Fig. 7 is optocoupler installation site vertical view in the utility model motor control module.
Embodiment
As shown in Figure 1-Figure 3, the measurement pattern switching device shifter of long light path DOAS gas analyzer, include the horizontally disposed cover cylinder 4 of central axis, cover cylinder 4 front end nozzle is coaxially connected with switching cylinder 1, the rotating shaft 14 that central axis is vertically arranged is rotatablely equipped with in cover cylinder 4, and the central axis of rotating shaft 14 and cover cylinder 4 central axis orthogonal vertical, diaphragm 2 is also provided with in cover cylinder 4, it is greatly horizontally disposed respectively that diaphragm 2 comprises central axis, small circular blackout aluminium sheet 21, 22, large its vertical diameter lower end position of circle blackout aluminium sheet 21 has round tube hole 23, small circular blackout aluminium sheet 22 is arranged in large circular blackout aluminium sheet 21 round tube hole 23, small circular blackout aluminium sheet 22 overlaps with the vertical diameter of the large circular aluminium sheet 21 that turns black, and small circular blackout aluminium sheet 22 is mutually vertical with the large circular aluminium sheet 21 that turns black, greatly, small circular blackout aluminium sheet 21, 22 are fixed in rotating shaft 14 with axis of rotation jointly by vertical straight path position, cover cylinder 4 inner bottom part rear end is provided with two-dimension adjustment frame 6, two-dimension adjustment frame 6 is provided with corner reflector 5, and when large circular blackout aluminium sheet 21 turns to large circular blackout aluminium sheet 21 central axis and cover cylinder 4 centerline axis parallel with rotating shaft 14, corner reflector 5 is in coaxial state with round tube hole 23 on the large circular aluminium sheet 21 that turns black, motor control module 3 is installed bottom cover cylinder 4, motor is provided with in motor control module 3, and motor and rotating shaft 14 lower end are in transmission connection.
Switching cylinder 1 front end connects DOAS analyser Cassegrain telescope, and is shaped to stepped hole in switching cylinder 1 front end, installs window 15 in stepped hole.
As shown in Figure 6, Figure 7, motor control module 3 is made up of motor 309, two optocouplers 301, the bar 303 that is in the light, axle union 305, rotating shaft 306, pin 310, holding screw 304, back up pad 313, support column 312, motor cabinet 308, rocker bearing 311, and optocoupler fixed head 302, hexagonal nut 307 form.Optocoupler 301 is fixed on optocoupler fixed head 302, optocoupler fixed head 302 is fixed on the relevant position of motor cabinet 308, motor 309 is fixed and motor cabinet 308, axle union 305, motor 309 are fastenedly connected by pin 310, hexagonal nut 307, the bar 303 that is in the light screws in axle union 305, rotating shaft 306 is fastenedly connected by holding screw 304 and axle union, and rocker bearing 311 is fixed on cover cylinder 4, then is fixed on rocker bearing 311 by support column 313, back up pad 312 by motor cabinet 308; When motor 309 rotates, moving axis union 305, rotating shaft 306 can be with, be in the light bar 303 synchronous axial system, when blocking the position of optocoupler 301 by the bar 303 that is in the light, motor 309 can stop operating the determination of the turned position realizing rotating shaft 306, and diaphragm is fixed in rotating shaft 306, thus the turned position of motor meeting synchro control diaphragm.
Motor in motor control module 3 is controlled by outside embedded system.
Two-dimension adjustment frame 6 is provided with the corner reflector stationary cylinder 16 of nylon material, corner reflector stationary cylinder 16 central axis is horizontally disposed with, rotate between corner reflector stationary cylinder 16 back-end central and two-dimension adjustment frame 6 and be provided with steel ball 17, and corner reflector stationary cylinder 16 rear end is fixed on two-dimension adjustment frame 6 by the screw of three distributions in isosceles triangle, realizes the adjustment of corner reflection by turning different screws; Corner reflector stationary cylinder 16 front end is set to nozzle and towards large circular blackout aluminium sheet 21, corner reflector 5 is coaxially arranged in corner reflector stationary cylinder 16, the front end that corner reflector 5 is positioned at corner reflector stationary cylinder 16 nozzle is plane, corner reflector 5 rear end faceted pebble stretches in corner reflector stationary cylinder 16, be provided with in the nozzle of corner reflector stationary cylinder 16 front end and compress the trim ring 18 of corner reflector, and be provided with O shape between trim ring 18 and corner reflector 5 and enclose.
The utility model is made up of cylinder 1 of transferring, diaphragm 2, motor control module 3, rain cover cylinder 4, corner reflector 5, two-dimension adjustment frame 6.Motor control module 3 is formed by motor, two location optocouplers, and is controlled by embedded control system.
In the utility model, diaphragm is made up of a large circular blackout aluminium sheet 21 and the small circular aluminium sheet 22 two pieces of shadow shields that turn black, and has a diameter and small circular to turn black the identical round tube hole 23 of aluminium sheet 22 diameter below large circular blackout aluminium sheet 21.The structure of rotating shaft can aluminium sheet be mutually perpendicular is fixed up by large and small circle blackout, axle union is inserted in rotating shaft one end of diaphragm, and with holding screw, rotating shaft is locked, the rotating shaft other end is placed in rotating shaft pilot hole, rotated by motor belt motor moving axis union, the rotating shaft of fixed aperture is rotated together with axle union with diaphragm, and the position of rotation is located by two optocouplers.The position of two optocouplers is in 90 °, and the position of diaphragm, by the control of optocoupler position, turns over 90 ° by diaphragm front, forwards optical cable side to.
Corner reflector 5 is fixed in the corner reflector stationary cylinder 16 of two-dimension adjustment frame 6 front end, being equipped with diameter between corner reflector stationary cylinder 16 and two-dimension adjustment frame 6 is 10mm steel ball, by three screw fixed angles catoptron stationary cylinders 16 and two-dimension adjustment frame 6, adjusted pitching and the beat of corner reflector by cross adjustment three screws.
As shown in Figure 4, the utility model device is positioned at the front end of DOAS analyser Cassegrain telescope, and grey black light is emergent ray, and the light that light source 8 sends, after 45 ° of catoptrons 7, arrives primary mirror 10, arrives the utility model device after primary mirror reflects.Analyser controls motor module and rotates, when the face of the large circular aluminium sheet in diaphragm 2 is parallel with emergent ray, emergent light directly shines in air and returns in telescope after the large corner reflector 13 of far-end reflects, and arrives optical fiber 12 through the convergence of primary mirror 10, the reflection of secondary mirror 9; The face of small circular blackout aluminium sheet is vertical with emergent ray, and light cannot angle of arrival catoptron 5 be thus rayless returns, and now analyser is then in the detection that namely monitoring pattern carries out real atmosphere pollutant.
As shown in Figure 5, described utility model device is positioned at the front end of DOAS analyser Cassegrain telescope, and grey black light lines represent the emergent ray of analyser, and the light that light source 8 sends is after 45 ° of catoptrons 7, arrive primary mirror 10, after primary mirror reflects, arrive the utility model device.Analyser controls motor module and rotates, and when the face of the large circle blackout aluminium sheet in diaphragm 2 is vertical with emergent ray, emergent light is blocked by large circular blackout aluminium sheet; The face of the small circular blackout aluminium sheet simultaneously in diaphragm 2 is parallel with emergent ray, and the light angle of arrival catoptron 5 through round tube hole reflects back into primary mirror 10, then to secondary mirror 9, then to optical fiber 12.Now analyser is then in calibration mode, now when passing into certain density calibrating gas in calibration pool 11 then can calibrate accordingly analyser or check.
Claims (5)
1. the measurement pattern switching device shifter of long light path DOAS gas analyzer, it is characterized in that: include the horizontally disposed cover cylinder of central axis, cover cylinder front end nozzle is coaxially connected with switching cylinder, the rotating shaft that central axis is vertically arranged is rotatablely equipped with in cover cylinder, and the central axis of rotating shaft and cover cylinder central axis orthogonal vertical, also diaphragm is provided with in cover cylinder, it is greatly horizontally disposed respectively that diaphragm comprises central axis, small circular blackout aluminium sheet, large its vertical diameter lower end position of circle blackout aluminium sheet has round tube hole, small circular blackout aluminium sheet is arranged in large circular blackout aluminium sheet round tube hole, small circular blackout aluminium sheet overlaps with the large circular vertical diameter of aluminium sheet that turns black, and small circular blackout aluminium sheet is mutually vertical with the large circular aluminium sheet that turns black, greatly, small circular blackout aluminium sheet is fixed in rotating shaft with axis of rotation jointly by vertical straight path position, the rotation of rotating shaft is by motor control module control realization, described cover cylinder inner bottom part rear end is provided with two-dimension adjustment frame, two-dimension adjustment frame is provided with corner reflector, and when large circular blackout aluminium sheet is with the extremely large circular blackout aluminium sheet central axis of axis of rotation and cover cylinder centerline axis parallel, corner reflector is in coaxial state with round tube hole on the large circular aluminium sheet that turns black, bottom described cover cylinder, motor control module is installed, motor is provided with in motor control module, and motor and rotating shaft lower end are in transmission connection.
2. the measurement pattern switching device shifter of long light path DOAS gas analyzer according to claim 1, it is characterized in that: described switching cylinder front end connects DOAS analyser Cassegrain telescope, and be shaped to stepped hole in switching cylinder front end, in stepped hole, window is installed.
3. the measurement pattern switching device shifter of long light path DOAS gas analyzer according to claim 1, it is characterized in that: described motor control module is made up of motor, two optocouplers, axle union, rotating shaft and fixed sturctures, the rotating shaft of fixed aperture is fixing with in axle union, when motor belt motor moving axis union is rotated, rotating shaft drives diaphragm to rotate with axle union, block optocoupler, realize location.
4. the measurement pattern switching device shifter of long light path DOAS gas analyzer according to claim 1, is characterized in that: the motor in described motor control module is controlled by outside embedded system.
5. the measurement pattern switching device shifter of long light path DOAS gas analyzer according to claim 1, it is characterized in that: the corner reflector stationary cylinder described two-dimension adjustment frame being provided with nylon material, corner reflector stationary cylinder central axis is horizontally disposed with, rotate between corner reflector stationary cylinder back-end central and two-dimension adjustment frame and be provided with steel ball, and corner reflector stationary cylinder rear end is fixed on two-dimension adjustment frame by the screw of three distributions in isosceles triangle, realizes the adjustment of corner reflection by turning different screws; Corner reflector stationary cylinder front end is set to nozzle and towards large circular blackout aluminium sheet, corner reflector is coaxially arranged in corner reflector stationary cylinder, the front end that corner reflector is positioned at corner reflector stationary cylinder nozzle is plane, corner reflector rear end faceted pebble stretches in corner reflector stationary cylinder, be provided with the trim ring compressing corner reflector in the nozzle of corner reflector stationary cylinder front end, and between trim ring and corner reflector, be provided with O shape circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520565392.6U CN204924923U (en) | 2015-07-28 | 2015-07-28 | Measurement mode switch device of linear light journey DOAS gas analysis appearance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520565392.6U CN204924923U (en) | 2015-07-28 | 2015-07-28 | Measurement mode switch device of linear light journey DOAS gas analysis appearance |
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| CN204924923U true CN204924923U (en) | 2015-12-30 |
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| CN201520565392.6U Active CN204924923U (en) | 2015-07-28 | 2015-07-28 | Measurement mode switch device of linear light journey DOAS gas analysis appearance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198429A (en) * | 2016-08-04 | 2016-12-07 | 安徽省环境监测中心站 | Integration garden poisonous and harmful multicomponent DOAS gas analyser |
| CN107515458A (en) * | 2017-09-22 | 2017-12-26 | 安徽蓝盾光电子股份有限公司 | A kind of method of raising FTIR transmitter unit emergent light light intensity |
-
2015
- 2015-07-28 CN CN201520565392.6U patent/CN204924923U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198429A (en) * | 2016-08-04 | 2016-12-07 | 安徽省环境监测中心站 | Integration garden poisonous and harmful multicomponent DOAS gas analyser |
| CN107515458A (en) * | 2017-09-22 | 2017-12-26 | 安徽蓝盾光电子股份有限公司 | A kind of method of raising FTIR transmitter unit emergent light light intensity |
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Address after: Electronic Industrial Zone of Shicheng Road, Tongling City, Anhui Province Co-patentee after: Anhui Anguang Environmental Technology Co., Ltd. Patentee after: Anhui Landun Photoelectron Co., Ltd. Address before: Electronic industrial zone Anhui city Tongling province Shicheng road 244000 Co-patentee before: Anhui Province Anguang Environmental Optical Engineering Technology Research Center Co., Ltd. Patentee before: Anhui Landun Photoelectron Co., Ltd. |