CN112881322A - Immersed ultraviolet-visible absorption spectrum sensor and using method thereof - Google Patents
Immersed ultraviolet-visible absorption spectrum sensor and using method thereof Download PDFInfo
- Publication number
- CN112881322A CN112881322A CN202110061182.3A CN202110061182A CN112881322A CN 112881322 A CN112881322 A CN 112881322A CN 202110061182 A CN202110061182 A CN 202110061182A CN 112881322 A CN112881322 A CN 112881322A
- Authority
- CN
- China
- Prior art keywords
- light
- shell
- angle
- reflector
- absorption spectrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000862 absorption spectrum Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 230000003287 optical effect Effects 0.000 claims description 41
- 238000002835 absorbance Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 8
- 238000002371 ultraviolet--visible spectrum Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000004224 UV/Vis absorption spectrophotometry Methods 0.000 claims 2
- 238000004847 absorption spectroscopy Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000007654 immersion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- 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
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/26—Generating the spectrum; Monochromators using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
-
- 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
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- 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
-
- 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
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/151—Gas blown
-
- 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
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/152—Scraping; Brushing; Moving band
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention relates to an immersed ultraviolet visible absorption spectrum sensor and a using method thereof, wherein the sensor comprises: the device comprises a shell, a light source, a spectrometer, a control device and a driving device are hermetically arranged in the shell, and the control device is respectively connected with the light source, the spectrometer and the driving device; the bottom of the shell is hermetically provided with an incident light window and a receiving light window; the reflector base is internally provided with a right-angle reflector; one end of the push rod is connected with the output end of the driving device, and the other end of the push rod extends out of the shell in a movable waterproof mode to be fixedly connected with the reflector base; the light source is used for emitting detection light, the detection light enters the liquid to be detected through the incident light window and then vertically enters the right-angle reflector, and the light reflected by the right-angle reflector enters the liquid to be detected again and then is emitted to the spectrometer through the receiving light window. The invention can realize the wide-range variable light-range detection without complex synchronous control, and can be widely applied to environmental water body monitoring.
Description
Technical Field
The invention relates to an immersed ultraviolet-visible absorption spectrum sensor and a using method thereof, relating to the technical field of water body detection.
Background
The immersed ultraviolet visible absorption spectrum sensor is used for water body detection and is also called a full spectrum sensor. Optical path length is one of the key hardware parameters of an absorption spectrum detection device. According to beer lambert's law, the optical path length is proportional to the absorbance for the same detection solution. Therefore, the larger the optical length of the full spectrum sensor, the higher the sensitivity, and the lower the absorbance detection upper limit. Because a general immersion type ultraviolet-visible absorption spectrum sensor has no automatic variable optical path design, in order to deal with different water quality conditions, different types distinguished by optical paths are designed in the prior art, for example, a small optical path type is used for a high pollution scene, and a large optical path type is used for a cleaner water body. However, in the scenes of urban rivers, drainage outlets and the like, a single optical path is difficult to meet the application requirements due to large water quality fluctuation. Meanwhile, water samples have different absorption coefficients with large difference at different wavelengths, and the single optical path cannot effectively detect different wavelengths.
In the prior art, an automatic optical path-variable ultraviolet-visible absorbance detection device is disclosed, and the device is applied and developed in the detection of trace samples in the early stage. However, the device is only suitable for a trace sample, changes the optical path within a small range (0.5-2 mm), and does not have immersion detection capability. The prior art also proposes an immersion uv-vis spectrophotometer detection head, but the immersion portion is limited to the detection head and does not contain a host computer, and does not contain an automated variable optical path solution. The prior art also provides a variable-range water quality monitoring system and a variable-range water quality monitoring method, which need to be realized by a variable-reflectivity mirror and an equivalent optical path, and due to the difference of light reflectivity of different wavelengths, the spectral shape is easy to distort, and the equivalent optical path has many interference factors, so that the design is difficult to determine, and the measurement effect is influenced.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an immersion type uv-vis absorption spectrum sensor and a method for using the same, which can automatically change the optical path to realize the detection of the optical path with a large range.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides an immersed uv-vis absorption spectrum sensor, including:
the device comprises a shell, a light source, a spectrometer, a control device and a driving device are hermetically arranged in the shell, and the control device is respectively connected with the light source, the spectrometer and the driving device; the bottom of the shell is hermetically provided with an incident light window and a receiving light window;
the reflector base is internally provided with a right-angle reflector;
one end of the push rod is connected with the output end of the driving device, and the other end of the push rod extends out of the shell in a movable waterproof mode to be fixedly connected with the reflector base; wherein,
the light source is used for emitting detection light, the detection light enters the liquid to be detected through the incident light window and then vertically enters the right-angle reflector, and the light reflected by the right-angle reflector enters the liquid to be detected again and then is emitted to the spectrometer through the receiving light window.
The immersed ultraviolet and visible absorption spectrum sensor is characterized in that the driving device adopts a motor.
The immersed ultraviolet-visible absorption spectrum sensor further realizes the control of the up-and-down movement of the push rod by the motor in a screw rod, gear or crankshaft connecting rod mode.
The immersed ultraviolet-visible absorption spectrum sensor further comprises two mutually perpendicular reflecting surfaces, wherein each reflecting surface forms an included angle of 45 degrees with the bottom plane of the shell, and the two perpendicular reflecting surfaces enable the detection light to form an angle of 180 degrees with the transmission direction of the received light.
The immersed ultraviolet-visible absorption spectrum sensor is characterized in that the right-angle reflector adopts two right-angle surfaces of a single total reflection quartz right-angle prism; or the right-angle reflector adopts two mutually perpendicular plane reflectors coated with ultraviolet reflecting films.
The immersed ultraviolet-visible absorption spectrum sensor is characterized in that optical fibers and/or collimating lenses are arranged between the light source and the incident light window and between the receiving light window and the spectrometer to improve the collimation degree of the light path.
The immersed ultraviolet-visible absorption spectrum sensor further adopts an O-shaped waterproof ring between the shell and the push rod to obtain dynamic waterproof performance.
The immersed ultraviolet-visible absorption spectrum sensor is characterized in that a gasket is arranged on the lower plane of the shell to obtain the static waterproof performance when the push rod is in the shortest extending distance.
The immersed ultraviolet-visible absorption spectrum sensor is characterized in that an air blowing hole or a rotary brush is arranged at the bottom of the shell, and when the shell is cleaned by air blowing or the rotary brush, the extension length of the push rod is controlled to enable the distance between the shell and the reflector base to be proper, so that the lower plane of the shell and the upper plane of the reflector base can be cleaned automatically at the same time.
In a second aspect, an embodiment of the present invention further provides a method for using an immersed ultraviolet-visible absorption spectrum sensor according to the first aspect of the embodiment of the present invention, including:
when the absorbance of the liquid to be detected needs to be detected, the immersed ultraviolet-visible absorption spectrum sensor is wholly thrown into the liquid to be detected, so that the liquid to be detected is at least immersed in the lower plane of the shell;
the light source emits detection light, the detection light vertically transmits through the incident light window to enter liquid to be detected, and then vertically enters the reflector base;
after two reflections of the right-angle reflector, the light is vertically emitted out of the reflector base at an angle of 180 degrees with the incident light, and the received light after passing through the liquid to be measured again is vertically emitted into the spectrometer through the light emitting window;
when the optical path needs to be changed, the control device controls the driving device to rotate to drive the push rod to move upwards to reduce the optical path or move downwards to increase the optical path.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. according to the invention, all electronic device parts and key devices are placed on the same side of the detection light window through the reflection type light path structure, the variable optical distance detection can be realized only by adjusting the distance between the reflector and the shell, the relative displacement of a circuit or an electronic device is not involved, the measurement is simple, the optical path adjustment is convenient, and the precision is high;
2. the invention makes the incident light path and the reflection light path completely separated by reflecting the detection light twice, and forms an angle of 180 degrees, when the light path is adjusted, the relative position of the reflection light and the sensor main body is not changed along with the change of the distance between the sensor main body and the reflection end surface, and the wide-range variable light path detection can be realized without complex synchronous control;
3. by means of simple and easy waterproof measures, the immersed automatic variable light range detection of the integral sensor can be realized, the use scene of the device is expanded, and the single sensor can meet the online absorption spectrum detection under various scenes such as cleaner surface water, high-turbidity rainfall runoff, industrial or domestic sewage and the like;
4. the invention is also provided with the air blowing holes or the rotating brushes, so that the optical window can be conveniently cleaned by air blowing or by rotating brushes;
in conclusion, the invention can be widely applied to environmental water body monitoring.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an immersed UV-visible absorption spectrum sensor according to an embodiment of the present invention; wherein,
the reference signs are: 1. a housing, 11, an incident light window, 12, a receiving light window; 2. a light source; 3. a spectrometer; 4. a control device; 5. a motor; 6. a reflector base; 7. a right angle reflector; 8. a push rod.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "upper", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
When the absorbance of liquid to be detected needs to be detected, the immersed ultraviolet visible absorption spectrum sensor is wholly put into the liquid to be detected, so that the liquid to be detected is at least immersed in the lower plane of the shell; the light source emits detection light, the detection light vertically transmits through the incident light window to enter liquid to be detected, and then vertically enters the reflector base; after two reflections of the right-angle reflector, the light is vertically emitted out of the reflector base at an angle of 180 degrees with the incident light, and the received light after passing through the liquid to be measured again is vertically emitted into the spectrometer through the light emitting window; when the optical path needs to be changed, the control device controls the driving device to rotate to drive the push rod to move upwards to reduce the optical path or move downwards to increase the optical path. The invention makes the incident light path and the reflection light path completely separated by reflecting the detection light twice and forming an angle of 180 degrees, when the light path is adjusted, the relative position of the reflection light and the sensor main body is not changed along with the change of the distance between the sensor main body and the reflection end surface, and the wide-range variable light path detection can be realized without complicated synchronous control.
Example 1
As shown in fig. 1, the immersed uv-vis absorption spectrum sensor provided in this embodiment includes a housing 1, a light source 2, a spectrometer 3, a control device 4, a motor 5, a reflector base 6, and a right-angle reflector 7.
And the shell 1 is used as a sensor main body structure bearing device and used for placing various devices.
A light source 2, a spectrometer 3, a control device 4 and a motor 5 are hermetically arranged in the shell 1; the light source 2 is used for emitting detection light to the water body to be detected; the spectrometer 3 is used for carrying out spectrum detection on received light returned by a water body to be detected, and the control device 4 receives signals of the upper computer and respectively controls the light source 2, the spectrometer 3 and the motor 5 to work.
The bottom of the housing 1 is hermetically provided with an incident light window 11 and a receiving light window 12, and the incident light window 11 and the receiving light window 12 are embedded in the bottom of the housing 1 in a fixed waterproof manner, such as waterproof adhesive. The incident light window 11 is used for transmitting the detection light emitted by the light source 2, and the receiving light window 12 is used for transmitting the received light returned by the water body to be detected.
And a reflector base 6 for fixedly supporting the right-angle reflector 7. The top of the reflector base 6 is connected with the output end of the motor 5 through a push rod 8; wherein, the output of motor 5 is connected to the one end of push rod 8, and the other end of push rod 8 stretches out casing 1 and reflector base 6 fixed connection for example with the waterproof mode of activity and fixes O type sealing washer on casing 1, and push rod 8 stretches out from O type circle bottom, and during the use, push rod 8 can reciprocate through the drive of motor 5 to adjust the distance between casing 1 and the reflector base 6, can change the optical path in a flexible way as required.
The position corresponds to the bottom of the shell 1, the top of the reflector base 6 is made of quartz glass which allows light to enter, the right-angle reflector 7 is arranged in the reflector base 6 in a sealing mode, the right-angle reflector 7 is provided with two mutually perpendicular reflecting surfaces, each reflecting surface and the plane at the bottom of the shell 1 form an included angle of 45 degrees, and the two perpendicular reflecting surfaces enable the detection light and the receiving light propagation direction to form an angle of 180 degrees.
In some embodiments of the present invention, the right-angle reflector 7 may be composed of two right-angle surfaces of a single total reflection quartz right-angle prism, or may be composed of two mutually perpendicular plane reflectors coated with ultraviolet reflective films, which is not limited herein as long as the requirement of optical path propagation can be satisfied.
In some embodiments of the present invention, the collimation degree of the light path can be improved by arranging the optical fiber and the collimating mirror between the light source 2 and the incident light window 11, and between the receiving light window 12 and the spectrometer 3, so as to increase the maximum optical path of the device, which can be selected according to actual needs, and is not limited herein, and the sensor can simultaneously satisfy the absorbance detection of the optical path of 1 to 100mm by tests.
In some embodiments of the present invention, the motor 5 may control the up-and-down movement of the push rod 8 through various manners such as a screw, a gear, a crankshaft connecting rod, etc., which is not limited herein as long as the effective optical path can be changed. Further, the motor 5 can adopt a stepping motor with a smaller pitch and subdivision control, so that stroke control errors are reduced, and meanwhile, the photoelectric switch can be adopted to position the initial position, so that the parallelism of multiple stroke control is improved.
In some embodiments of the present invention, an O-ring or multi-stage O-ring may be used between the housing 1 and the push rod 8 to obtain dynamic waterproof performance; further, a gasket may be provided on the lower plane of the housing 1 to obtain static waterproof performance when the push rod 8 is in the extended shortest distance (standby position).
In some embodiments of the present invention, the bottom of the housing 1 may be provided with an air blowing hole, and high-pressure air generated by external equipment is guided into a reserved hole near the optical window; the bottom of the shell 1 can also be provided with a rotating brush, the rotating brush is driven by a direct current motor additionally arranged in the shell 1, the control is carried out through the control device 4, when air blowing or rotating brush cleaning is carried out, the extending length of the control push rod 8 is controlled, the distance between the shell 1 and the reflector base 6 is proper, and the lower plane of the shell 1 and the upper plane of the reflector base 6 can be automatically cleaned simultaneously.
Example 2
The method of using the immersion type uv-vis absorption spectrum sensor provided in embodiment 1 of the present invention will be described in detail below.
When the absorbance of the liquid to be detected needs to be detected, the immersed ultraviolet-visible absorption spectrum sensor is wholly thrown into the liquid to be detected, so that the liquid to be detected is at least immersed in the lower plane of the shell 1, and then the detection can be carried out;
the light source 2 emits detection light which vertically transmits through the incident light window 11 to enter liquid to be detected and then vertically enters the reflector base 6;
after 2 times of reflection of the right-angle reflector 7, the light and the incident light form an angle of 180 degrees and vertically exit the reflector base 6, and the received light passing through the liquid to be measured again vertically enters the spectrometer 3 through the exit light window 12;
when the optical path needs to be changed, the control device 4 controls the motor 5 to rotate to drive the push rod 8 to move upwards to reduce the optical path or move downwards to increase the optical path. In the process that the optical path changes, only telescopic motion in the vertical direction of the push rod 8 occurs, the reflector base 6 and the right-angle reflector 7 fixed to the extending end of the push rod 8 do not contain circuit devices, and the waterproof effect of the whole sensor during dynamic detection can be achieved only by solving the telescopic waterproof performance between the push rod 8 and the shell 1.
During the telescoping of the plunger 8, the relative position of the received light back to the exit light window 12 does not change, since the received light makes an angle of 180 ° with the incident light, and no additional mechanical position adjustment is required. The optical path that light passes through in the liquid to be measured is equal to 2 times of the perpendicular distance of plane on optical window to reflector base 6 all the time, can carry out accurate control through motor 5, conveniently realizes the optical path demand and carries out later data calculation.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit or scope of the present invention.
Claims (10)
1. An immersed ultraviolet-visible absorption spectroscopy sensor, comprising:
the device comprises a shell, a light source, a spectrometer, a control device and a driving device are hermetically arranged in the shell, and the control device is respectively connected with the light source, the spectrometer and the driving device; the bottom of the shell is hermetically provided with an incident light window and a receiving light window;
the reflector base is internally provided with a right-angle reflector;
one end of the push rod is connected with the output end of the driving device, and the other end of the push rod extends out of the shell in a movable waterproof mode to be fixedly connected with the reflector base; wherein,
the light source is used for emitting detection light, the detection light enters the liquid to be detected through the incident light window and then vertically enters the right-angle reflector, and the light reflected by the right-angle reflector enters the liquid to be detected again and then is emitted to the spectrometer through the receiving light window.
2. The immersed uv-vis absorption spectrum sensor according to claim 1, wherein the driving means employs a motor.
3. The immersed ultraviolet-visible absorption spectrum sensor according to claim 2, wherein the motor controls the push rod to move up and down through a screw, a gear or a crankshaft connecting rod.
4. A submerged uv-vis absorption spectroscopy sensor according to claim 1, wherein the right-angle reflector comprises two mutually perpendicular reflective surfaces, each at a 45 ° angle to the plane of the housing bottom, the two perpendicular reflective surfaces being such that the detection light is at a 180 ° angle to the direction of propagation of the received light.
5. The immersed uv-vis absorption spectroscopy sensor according to claim 4, wherein the right-angle reflector employs two right-angle faces of a single fully reflective quartz right-angle prism; or the right-angle reflector adopts two mutually perpendicular plane reflectors coated with ultraviolet reflecting films.
6. An immersed ultraviolet-visible absorption spectrum sensor according to any one of claims 1 to 5, wherein optical fibers and/or collimating lenses are arranged between the light source and the incident light window and between the receiving light window and the spectrometer to improve the collimation of the light path.
7. An immersed ultraviolet-visible absorption spectrum sensor according to any one of claims 1 to 5, wherein an O-shaped waterproof ring is adopted between the shell and the push rod to obtain dynamic waterproof performance.
8. An immersed ultraviolet-visible absorption spectrum sensor according to any one of claims 1 to 5, wherein a gasket is arranged on the lower plane of the shell to obtain static waterproof performance when the push rod is in the shortest protruding distance.
9. An immersed ultraviolet-visible absorption spectrum sensor according to any one of claims 1 to 5, wherein an air blowing hole or a rotating brush is arranged at the bottom of the shell, and when air blowing or rotating brush cleaning is carried out, the extending length of the push rod is controlled to enable the distance between the shell and the reflector base to be proper, so that the lower plane of the shell and the upper plane of the reflector base can be automatically cleaned simultaneously.
10. The use method of the immersed ultraviolet-visible absorption spectrum sensor based on any one of claims 1 to 9 is characterized by comprising the following steps:
when the absorbance of the liquid to be detected needs to be detected, the immersed ultraviolet-visible absorption spectrum sensor is wholly thrown into the liquid to be detected, so that the liquid to be detected is at least immersed in the lower plane of the shell;
the light source emits detection light, the detection light vertically transmits through the incident light window to enter liquid to be detected, and then vertically enters the reflector base;
after two reflections of the right-angle reflector, the light is vertically emitted out of the reflector base at an angle of 180 degrees with the incident light, and the received light after passing through the liquid to be measured again is vertically emitted into the spectrometer through the light emitting window;
when the optical path needs to be changed, the control device controls the driving device to rotate to drive the push rod to move upwards to reduce the optical path or move downwards to increase the optical path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061182.3A CN112881322A (en) | 2021-01-18 | 2021-01-18 | Immersed ultraviolet-visible absorption spectrum sensor and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061182.3A CN112881322A (en) | 2021-01-18 | 2021-01-18 | Immersed ultraviolet-visible absorption spectrum sensor and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112881322A true CN112881322A (en) | 2021-06-01 |
Family
ID=76048818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110061182.3A Pending CN112881322A (en) | 2021-01-18 | 2021-01-18 | Immersed ultraviolet-visible absorption spectrum sensor and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112881322A (en) |
Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643364A (en) * | 2002-03-15 | 2005-07-20 | Ysi公司 | Device for cleaning water quality sensors |
| CN1908623A (en) * | 2005-08-02 | 2007-02-07 | 德菲电气（北京）有限公司 | Multi-component infrared online gas analyzer |
| CN101042327A (en) * | 2007-03-02 | 2007-09-26 | 重庆工学院 | Fiber optic sensor system for on-line measuring biomass concentration |
| CN101358922A (en) * | 2008-09-23 | 2009-02-04 | 杭州电子科技大学 | Continuous mode locker for optical near-field cavity ringdown spectroscopy |
| CN102004077A (en) * | 2010-10-08 | 2011-04-06 | 中国农业大学 | Turbidity transducer |
| CN202442956U (en) * | 2012-02-21 | 2012-09-19 | 杭州绿洁水务科技有限公司 | Immersed online spectrum water quality analyzer and automatic light window cleaning device thereof |
| CN102928386A (en) * | 2012-11-27 | 2013-02-13 | 重庆市科学技术研究院 | Turbidity sensor and water body turbidity on-line detection method |
| CN203405414U (en) * | 2013-08-30 | 2014-01-22 | 厦门斯坦道科学仪器股份有限公司 | Online dissolved oxygen detection device with automatic cleaning function |
| CN203432903U (en) * | 2013-09-26 | 2014-02-12 | 青岛科技大学 | Double-wavelength underwater fluorescence detection device |
| CN203572770U (en) * | 2013-04-23 | 2014-04-30 | 河海大学 | Optical path adjustable device for water quality detection |
| CN105866032A (en) * | 2016-06-15 | 2016-08-17 | 中国科学院南海海洋研究所 | Portable underwater spectral measurement device |
| CN106323465A (en) * | 2016-09-26 | 2017-01-11 | 深圳市太赫兹科技创新研究院 | Delay line device and terahertz time-domain spectrograph system |
| CN107462523A (en) * | 2017-09-15 | 2017-12-12 | 宇星科技发展(深圳)有限公司 | A kind of adjustable optical path device and on-line water quality monitoring method |
| CN108007897A (en) * | 2017-11-28 | 2018-05-08 | 湖北久之洋红外系统股份有限公司 | A kind of terahertz time-domain spectroscopy measuring system |
| CN108458976A (en) * | 2017-02-17 | 2018-08-28 | 湖南城市学院 | Water transparency detection method and water transparency detection device |
| CN207816817U (en) * | 2018-02-11 | 2018-09-04 | 长春工程学院 | Measure the Michelson's interferometer index glass device of liquid refractivity |
| CN209417415U (en) * | 2019-03-12 | 2019-09-20 | 西安飞秒光纤技术有限公司 | A kind of the optical time delay module and optical time delay device of free space |
| CN110441237A (en) * | 2019-09-18 | 2019-11-12 | 重庆冠雁科技有限公司 | A kind of immersion ultraviolet-uisible spectrophotometer detector and detection method |
| CN110632015A (en) * | 2019-11-07 | 2019-12-31 | 成都千嘉科技有限公司 | Variable light form gas sensor |
| CN210604362U (en) * | 2019-07-30 | 2020-05-22 | 杭州米欧仪器有限公司 | Spectrophotometer fiber optic head assembly and photometer |
| CN211839353U (en) * | 2020-03-25 | 2020-11-03 | 陕西中烟工业有限责任公司 | Light window cleaning gas circuit pressure regulating device in moisture meter for tobacco shred detection |
| CN111879727A (en) * | 2020-06-22 | 2020-11-03 | 中国科学院合肥物质科学研究院 | Receiving and transmitting same-side light path structure, device and application of multiband detection for gas monitoring |
| CN111912831A (en) * | 2020-06-09 | 2020-11-10 | 青岛大学 | Underwater spectrum detection device and method |
-
2021
- 2021-01-18 CN CN202110061182.3A patent/CN112881322A/en active Pending
Patent Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643364A (en) * | 2002-03-15 | 2005-07-20 | Ysi公司 | Device for cleaning water quality sensors |
| CN1908623A (en) * | 2005-08-02 | 2007-02-07 | 德菲电气（北京）有限公司 | Multi-component infrared online gas analyzer |
| CN101042327A (en) * | 2007-03-02 | 2007-09-26 | 重庆工学院 | Fiber optic sensor system for on-line measuring biomass concentration |
| CN101358922A (en) * | 2008-09-23 | 2009-02-04 | 杭州电子科技大学 | Continuous mode locker for optical near-field cavity ringdown spectroscopy |
| CN102004077A (en) * | 2010-10-08 | 2011-04-06 | 中国农业大学 | Turbidity transducer |
| CN202442956U (en) * | 2012-02-21 | 2012-09-19 | 杭州绿洁水务科技有限公司 | Immersed online spectrum water quality analyzer and automatic light window cleaning device thereof |
| CN102928386A (en) * | 2012-11-27 | 2013-02-13 | 重庆市科学技术研究院 | Turbidity sensor and water body turbidity on-line detection method |
| CN203572770U (en) * | 2013-04-23 | 2014-04-30 | 河海大学 | Optical path adjustable device for water quality detection |
| CN203405414U (en) * | 2013-08-30 | 2014-01-22 | 厦门斯坦道科学仪器股份有限公司 | Online dissolved oxygen detection device with automatic cleaning function |
| CN203432903U (en) * | 2013-09-26 | 2014-02-12 | 青岛科技大学 | Double-wavelength underwater fluorescence detection device |
| CN105866032A (en) * | 2016-06-15 | 2016-08-17 | 中国科学院南海海洋研究所 | Portable underwater spectral measurement device |
| CN106323465A (en) * | 2016-09-26 | 2017-01-11 | 深圳市太赫兹科技创新研究院 | Delay line device and terahertz time-domain spectrograph system |
| CN108458976A (en) * | 2017-02-17 | 2018-08-28 | 湖南城市学院 | Water transparency detection method and water transparency detection device |
| CN107462523A (en) * | 2017-09-15 | 2017-12-12 | 宇星科技发展(深圳)有限公司 | A kind of adjustable optical path device and on-line water quality monitoring method |
| CN108007897A (en) * | 2017-11-28 | 2018-05-08 | 湖北久之洋红外系统股份有限公司 | A kind of terahertz time-domain spectroscopy measuring system |
| CN207816817U (en) * | 2018-02-11 | 2018-09-04 | 长春工程学院 | Measure the Michelson's interferometer index glass device of liquid refractivity |
| CN209417415U (en) * | 2019-03-12 | 2019-09-20 | 西安飞秒光纤技术有限公司 | A kind of the optical time delay module and optical time delay device of free space |
| CN210604362U (en) * | 2019-07-30 | 2020-05-22 | 杭州米欧仪器有限公司 | Spectrophotometer fiber optic head assembly and photometer |
| CN110441237A (en) * | 2019-09-18 | 2019-11-12 | 重庆冠雁科技有限公司 | A kind of immersion ultraviolet-uisible spectrophotometer detector and detection method |
| CN110632015A (en) * | 2019-11-07 | 2019-12-31 | 成都千嘉科技有限公司 | Variable light form gas sensor |
| CN211839353U (en) * | 2020-03-25 | 2020-11-03 | 陕西中烟工业有限责任公司 | Light window cleaning gas circuit pressure regulating device in moisture meter for tobacco shred detection |
| CN111912831A (en) * | 2020-06-09 | 2020-11-10 | 青岛大学 | Underwater spectrum detection device and method |
| CN111879727A (en) * | 2020-06-22 | 2020-11-03 | 中国科学院合肥物质科学研究院 | Receiving and transmitting same-side light path structure, device and application of multiband detection for gas monitoring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9194733B2 (en) | Photoelectric-type continuous liquid level measurement method and device | |
| CN102232181B (en) | Dual sample mode spectrophotometer | |
| CN203132991U (en) | Movable-part-free multichannel angle modulation type surface plasmon resonance (SPR) sensor detection system | |
| KR940002632B1 (en) | Collimated light optrode | |
| CN101509801A (en) | Intelligent light source linear array CCD liquid level measuring method and device | |
| CN105548014A (en) | Optical absorption device with adjustable double absorption optical paths | |
| US2768553A (en) | Refractometers | |
| CN105092492A (en) | Light guide capillary-based photometric analyzer and detection method thereof | |
| CN110044286A (en) | A kind of Spectral Confocal axial distance detection method, device and equipment | |
| US20200158555A1 (en) | Liquid level detection system and liquid level detection method | |
| CN201974214U (en) | Liquid level measuring device based on linear array CCD (charge coupled device) and transparent tube | |
| RU56599U1 (en) | LIQUID LEVEL METER | |
| CN112881322A (en) | Immersed ultraviolet-visible absorption spectrum sensor and using method thereof | |
| US6885455B2 (en) | Self-calibration of an optical-based sensor using a total internal reflection (TIR) signature | |
| CA1066086A (en) | Photoelectric sensing head with wiping means | |
| KR20130082482A (en) | Optical wave guide | |
| CN113466137B (en) | Reflection mobile type water body optical attenuation coefficient measuring device and method | |
| CN110673332A (en) | High-precision laser partition scanning device | |
| KR101412212B1 (en) | Optical wave guide | |
| CN111175723A (en) | Laser radar light path system | |
| CN220170876U (en) | Water quality detector with adjustable detection angle | |
| WO2022032713A1 (en) | Waterproof and pressure-resistant optical sensor | |
| CN220872343U (en) | Constant-temperature long-optical-path cavity enhanced gas absorption tank | |
| SU137689A1 (en) | Automatic refractometer | |
| CN103900483A (en) | Laser scanning type outer-diameter detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210601 |