CN110823378A - Outdoor portable spectrum appearance - Google Patents
Outdoor portable spectrum appearance Download PDFInfo
- Publication number
- CN110823378A CN110823378A CN201910966331.3A CN201910966331A CN110823378A CN 110823378 A CN110823378 A CN 110823378A CN 201910966331 A CN201910966331 A CN 201910966331A CN 110823378 A CN110823378 A CN 110823378A
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- light
- optical fiber
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- probe
- light intensity
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- 238000001228 spectrum Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 63
- 239000000523 sample Substances 0.000 claims abstract description 63
- 230000003287 optical effect Effects 0.000 claims abstract description 40
- 238000005286 illumination Methods 0.000 claims abstract description 7
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 3
- 239000013307 optical fiber Substances 0.000 claims description 69
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- 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
- 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
- G01J3/0202—Mechanical elements; Supports for optical elements
-
- 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
- G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
-
- 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
- G01J2003/425—Reflectance
Abstract
The invention discloses an outdoor portable spectrometer, which comprises a light intensity tracking module and a spectrum detection module; the light intensity tracking module comprises a light intensity detection box, a photoresistor is arranged at the bottom in the light intensity detection box, and the light source is tracked by rotating the position of the light intensity detection box according to illumination information through an information adjusting structure input by the photoresistor; the spectrum detection module comprises a light receiving probe which provides a light source for the spectrum detection module; the optical filter rotary table is provided with optical filters with various specifications, and light input by the light receiving probe is filtered to obtain light with a selected wavelength; the specific wavelength light receiving device transmits the light with the obtained selected wavelength to an object to be detected; the reflected light receiving device is used for receiving the light reflected by the object to be detected and is used for spectral analysis; the sunlight is used as a light source, the maximum light intensity is obtained by using the control light source tracking module, and the measurement precision is improved.
Description
Technical Field
The invention belongs to the technical field of spectrometers, and particularly relates to an outdoor portable spectrometer.
Background
Compared with the traditional chemical and physical analysis technology, the near infrared spectrum analysis technology has a great number of advantages. The near-infrared spectrometer has the advantages of high detection speed, accurate result and good structure, and is suitable for analysis objects in various states. Compared with the traditional near-infrared spectrometer, the portable spectrometer has more advantages, microminiature, low cost and easy modularization.
When the object is detected, enough light needs to be collected to fully detect the object. However, the positions of the light source of the existing spectrometer and the lens of the light collecting source are fixed, and cannot be adjusted according to actual conditions, and the light collecting and actual detecting effects are poor. The existing spectrometer has a large and expensive structure and low automation degree, can not realize field detection and can not be used outdoors and in fields.
Therefore, a spectroscopic instrument is needed, which has the advantages of simple structure, light volume, easy carrying and simple operation, and can be used and operated outdoors and in fields. And the sunlight is used as a light source, so that the position of the sunlight receiving probe can be adjusted according to the irradiation condition of the sunlight to meet the light ray collecting requirement of the whole system, and the detection precision is improved.
Disclosure of Invention
The invention provides an outdoor portable spectrometer according to the problems in the prior art, solves the problem that the conventional probe and lens are inconvenient to adjust, adopts sunlight as a light source, and improves the measurement precision by using a control light source tracking module to obtain the maximum light intensity.
The technical scheme adopted by the invention is as follows:
an outdoor portable spectrometer comprises a light intensity tracking module and a spectrum detection module;
the light intensity tracking module comprises a light intensity detection box, a photoresistor is arranged at the bottom in the light intensity detection box, the position of the light source relative to the light intensity detection box is obtained by collecting illumination information through the photoresistor, and the adjusting structure rotates the position of the light intensity detection box according to the illumination information to realize the tracking of the light source;
the spectrum detection module comprises a receiving optical probe, an optical filter rotary table, a specific wavelength optical receiving device and a reflected light receiving device, wherein the receiving optical probe provides a light source for the spectrum detection module; the optical filter rotary table is provided with optical filters with various specifications, and light input by the light receiving probe is filtered to obtain light with a selected wavelength; the specific wavelength light receiving device transmits the light with the obtained selected wavelength to an object to be detected; the reflected light receiving device is used for receiving the light reflected by the object to be detected and is used for spectral analysis;
further, the adjusting structure comprises a horizontal placing table, a light intensity detection box and a receiving optical probe are mounted on the upper surface of the horizontal placing table, a pitching shaft is horizontally arranged at the bottom of the horizontal placing table, and the pitching shaft is provided with a first stepping motor and is used for driving the horizontal placing table to rotate along a horizontal axis; a rotating shaft is arranged perpendicular to the pitching shaft, and the rotating shaft is provided with a second stepping motor and is used for driving the horizontal placing table to rotate along the vertical axis;
further, the bottom of the receiving optical probe is sequentially connected with an optical fiber, a collimating mirror and a first optical fiber probe, and the first optical fiber probe faces to a certain optical filter on the optical filter rotary table;
further, the specific wavelength light receiving device comprises a second optical fiber probe and a first optical fiber and second optical fiber splitter which are sequentially connected, the first optical fiber and second optical fiber splitter is respectively connected with a third optical fiber probe and a fourth optical fiber probe through optical fibers, the second optical fiber probe is arranged opposite to the first optical fiber probe, and the third optical fiber probe and the fourth optical fiber probe are arranged towards the object to be detected;
further, the reflected light receiving device comprises a photodiode, the photodiode is connected with the single chip microcomputer through a detection circuit, and collected signals are input into the single chip microcomputer;
further, the optical filter rotary table, the specific wavelength light receiving device and the reflected light receiving device are all arranged in a closed detection box, a photodiode of the reflected light receiving device is in a vertical plate shape, and the photodiode is arranged between the object end to be detected and the second optical fiber probe in the detection box.
The invention has the beneficial effects that:
the invention relates to an outdoor portable spectrometer which is designed by adopting a photoelectric detection method based on a near infrared spectrum technology. Small volume, simple operation, easy carrying and realization of field detection.
The invention adopts natural light as a light source and can adjust the position of the receiving probe according to the irradiation condition of sunlight, thereby better meeting the light collection requirement of the whole system and improving the measurement precision of the whole system.
The invention adopts the double-light-path method, and can better reduce the influence of the stability of the light source on the detection system.
The invention has simple operation, low cost, portable volume, outdoor use and good practical application value.
Drawings
FIG. 1 is a perspective view of the device of the present invention;
FIG. 2 is a structural view of a light intensity detecting device of the apparatus of the present invention;
FIG. 3 is a schematic view showing a connection relationship of rotating members;
FIG. 4 is a schematic view of the horizontal placement table of the apparatus of the present invention;
FIG. 5 is a schematic view of a filter turret of the apparatus of the present invention;
FIG. 6 is a schematic view of the optical path detection of the apparatus of the present invention;
FIG. 7 is a schematic diagram of the optical path of the apparatus of the present invention;
FIG. 8 is a flow chart of the operation of the apparatus of the present invention;
in the figure, 1, a light receiving probe, 2, a light intensity detection box 3, a horizontal placing table, 4, a first stepping motor, 5, a second stepping motor, 6, a rotating shaft a, 7, a bearing, 8, a base, 9, an optical fiber, 10, a collimating mirror, 11, a first optical fiber probe, 12, a third stepping motor, 13, an optical filter rotating table, 14, a second optical fiber probe, 15, an optical fiber one-in-one splitter, 16, a pitching shaft, 17, a photodiode, 18, a third optical fiber probe, 19, a fourth optical fiber probe, 20, an optical fiber, 21, an optical filter, 22, a bearing, 23, a base, 24, a rotating shaft b, 25 and a photoresistor are arranged.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, an outdoor portable spectrometer comprises a light intensity detection module and a spectrum detection module,
the light intensity detection module comprises a light intensity detection box 2, a rectangular light collecting window is formed in the top of the light intensity detection box 2, 4 identical photo resistors 25 are arranged at the bottom of the light intensity detection box 2, and a rectangle is formed between the 4 photo resistors 25 along the light collecting window as shown in fig. 2; and each photo-resistor 25; each photosensitive resistor 25 is connected with a single chip microcomputer, an analog-to-digital conversion module of the single chip microcomputer collects voltage difference values between the photosensitive resistors 25, the single chip microcomputer can judge whether sunlight is ahead or behind a light intensity detection box according to the change of the voltage difference values between the photosensitive resistors 25, and when the sunlight is over against the light intensity detection box 2, the voltage difference is zero. For example, when the sunlight is ahead or behind the light intensity detection box 2, there is a voltage difference between the photo resistors 25, and the single chip further determines the position of the light source relative to the light intensity detection box 2 according to the voltage difference.
As shown in fig. 3 and 4, the bottom of the light intensity detection box 2 is fixedly installed on the upper surface of the horizontal placing table 3, a pitching shaft 16 is horizontally arranged at the bottom of the horizontal placing table 3, and the pitching shaft 16 is provided with a first stepping motor 4 for driving the horizontal placing table 3 to rotate along the horizontal axis; a rotating shaft 6 is arranged perpendicular to the pitching shaft 16, and the rotating shaft a6 is provided with a second stepping motor 5 for driving the horizontal placing table 3 to rotate along the vertical axis; the light intensity detection box 2 can track the illumination of the sun by rotating in the horizontal direction and the vertical direction.
The spectrum detection module comprises a receiving optical probe 1, and the bottom of the receiving optical probe 1 is fixedly arranged on the upper surface of the horizontal placing table 3; the bottom of the receiving optical probe 1 is connected with the upper end of an optical fiber 9 for transmitting optical signals, the lower end of the optical fiber 9 is connected with the upper end of a collimating mirror 10, the lower end of the collimating mirror 10 is connected with a first optical fiber probe 11, the collimating mirror 10 collimates and focuses light, and the light focused by the collimating mirror 10 is aligned to one side of an optical filter rotary table 13 through the first optical fiber probe 11; as shown in fig. 5, the optical filter rotating platform 13 is in a wheel disk shape formed by a plurality of optical filters 21, the middle part of the optical filter rotating platform 13 is connected with one end of a rotating shaft b24 of the stepping motor three 12, the other end of the rotating shaft b24 is installed on the base 23 through a bearing 22, and the base 23 is fixedly installed on the vertical side wall of the closed detection box. A second optical fiber probe 14 is arranged on one side of the optical filter rotary table 13, one end of the second optical fiber probe 14 is arranged opposite to the first optical fiber probe 11, as shown in fig. 6, the other end of the second optical fiber probe 14 is connected with one end of a first optical fiber and second optical fiber splitter 15, the other end of the first optical fiber and second optical fiber splitter 15 is respectively connected with one end of 2 optical fibers 20, and the optical path is divided into two paths through the first optical fiber and second optical fiber splitter 15; the other end of each optical fiber 20 is provided with a third optical fiber probe 18 and a fourth optical fiber probe 19, the third optical fiber probe 18 and the fourth optical fiber probe 19 face an object area to be detected, a plate-shaped photodiode 17 is arranged in the detection box, the photodiode 17 is arranged between the object end to be detected and the second optical fiber probe 14 in the detection box, the photodiode 17 is connected with the single chip microcomputer through a detection circuit, and collected signals are input into the single chip microcomputer.
In order to explain the technical scheme protected by the invention more clearly, the following is further explained in conjunction with the working process of the invention as shown in fig. 8:
in the working process, when sunlight irradiates on the photosensitive resistor 25 in the light intensity detection box 2 of the horizontal placing platform 3, the sunlight lags behind the light intensity detection box, faces the light intensity detection box and advances the light intensity detection box. Because the sunlight lags behind the light intensity detection box, faces the light intensity detection box and leads the light intensity detection box, a voltage difference is formed among the four photoresistors 25. The voltage difference is converted into a digital signal through analog-to-digital conversion and transmitted to the singlechip. When the sunlight is directly opposite to the light intensity detection box 2, the voltage difference is zero. When sunlight leads or lags the light intensity detection box 2, a voltage difference exists between the photoresistors 25, the single chip microcomputer drives the first stepping motor 4 and the second stepping motor 5 to rotate, the voltage difference is zero, the horizontal placing table 3 faces the sunlight at the moment, the light intensity received by the light receiving probe 1 is the largest, and therefore the device can automatically find the maximum illumination intensity.
An object to be detected is placed in front of the third optical fiber probe 18 and the fourth optical fiber probe 19, the button is pressed, and the third stepping motor 12 drives the optical filter rotary table 12 to rotate, so that the required optical filter is aligned with the first optical fiber probe 11 and the second optical fiber probe 12. The first optical fiber probe 11 and the second optical fiber probe 12 are in horizontal positions.
As shown in fig. 7, the light with a specific wavelength obtained by the optical filter 21 is split into two light paths by the optical fiber one-to-two splitter 15, passes through the optical fiber 16 and the optical fiber 20, and is irradiated onto the object to be detected by the optical fiber probe three 18 and the optical fiber probe four 19. The light is irradiated onto an object to be detected and then reflected onto the photodiode 17.
The detection circuit inputs the light radiation intensity information under different wavelengths into the single chip microcomputer to calculate the spectrum information, and finally, the processed and analyzed result is displayed on the display.
The above embodiments are only used for illustrating the design idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention accordingly, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes and modifications made in accordance with the principles and concepts disclosed herein are intended to be included within the scope of the present invention.
Claims (6)
1. An outdoor portable spectrometer is characterized by comprising a light intensity tracking module and a spectrum detection module;
the light intensity tracking module comprises a light intensity detection box (2), a photoresistor (25) is arranged at the bottom in the light intensity detection box (2), illumination information is collected through the photoresistor (25) to obtain the position of the light source relative to the light intensity detection box (2), and the adjusting structure rotates the position of the light intensity detection box (2) according to the illumination information to realize the tracking of the light source;
the spectrum detection module comprises a receiving optical probe (1), an optical filter rotary table (13), a specific wavelength optical receiving device and a reflected light receiving device, wherein the receiving optical probe (1) provides a light source for the spectrum detection module; the optical filter rotary table (13) is provided with optical filters with various specifications, and light input by the light receiving probe (1) is filtered to obtain light with a selected wavelength; the specific wavelength light receiving device transmits the light with the obtained selected wavelength to an object to be detected; the reflected light receiving device is used for receiving the light reflected by the object to be detected and is used for spectral analysis.
2. An outdoor portable spectrometer according to claim 1, wherein the adjusting structure comprises a horizontal placing table (3), the upper surface of the horizontal placing table (3) is provided with a light intensity detection box (3) and a light receiving probe (1), the bottom of the horizontal placing table (3) is horizontally provided with a pitching shaft (16), and the pitching shaft (16) is provided with a first stepping motor (4) for driving the horizontal placing table (3) to rotate along the horizontal axis; and a rotating shaft (6) is vertically arranged on the pitching shaft (16), and the rotating shaft (6) is provided with a second stepping motor (5) for driving the horizontal placing table (3) to rotate along the vertical axis.
3. An outdoor portable spectrometer according to claim 1, wherein the bottom of the receiving optical probe (1) is connected with an optical fiber (9), a collimating mirror (10) and a first optical fiber probe (11) in sequence, and the first optical fiber probe (11) is arranged towards a certain optical filter (21) on the optical filter rotary table (13).
4. An outdoor portable spectrometer according to claim 1, wherein the specific wavelength light receiving device comprises a second optical fiber probe (14) and a first optical fiber combiner splitter (15) which are connected in sequence, the first optical fiber combiner splitter (15) is respectively connected with a third optical fiber probe (18) and a fourth optical fiber probe (19) through optical fibers, the second optical fiber probe (14) is arranged opposite to the first optical fiber probe (11), and the third optical fiber probe (18) and the fourth optical fiber probe (19) are arranged towards the object to be detected.
5. An outdoor portable spectrometer according to claim 1, wherein the reflected light receiving device comprises a photodiode (17), the photodiode (17) is connected with a single chip microcomputer through a detection circuit, and collected signals are input into the single chip microcomputer.
6. An outdoor portable spectrometer according to claim 1, wherein the optical filter rotating table (13), the specific wavelength light receiving device and the reflected light receiving device are all disposed in a sealed detection box, the photodiode (17) of the reflected light receiving device is in a vertical plate shape, and the photodiode (17) is disposed between the object end to be detected and the second optical fiber probe (17) in the detection box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910966331.3A CN110823378A (en) | 2019-10-12 | 2019-10-12 | Outdoor portable spectrum appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910966331.3A CN110823378A (en) | 2019-10-12 | 2019-10-12 | Outdoor portable spectrum appearance |
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| Publication Number | Publication Date |
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| CN110823378A true CN110823378A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910966331.3A Pending CN110823378A (en) | 2019-10-12 | 2019-10-12 | Outdoor portable spectrum appearance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233130A (en) * | 2023-08-25 | 2023-12-15 | 北京师范大学 | Portable sunlight-induced fluorescence auxiliary measuring device |
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| CN102854893A (en) * | 2011-06-28 | 2013-01-02 | 吴昌德 | Device for tracking sunlight irradiation direction |
| CN102997996A (en) * | 2012-11-30 | 2013-03-27 | 中国科学院上海技术物理研究所 | Shortwave infrared day and night remote multispectral imager and imaging method |
| CN202994134U (en) * | 2013-01-10 | 2013-06-12 | 齐齐哈尔大学 | Sunlight incident angle photoelectric detection device |
| US20140247442A1 (en) * | 2010-07-27 | 2014-09-04 | Microptix Technologies, Llc | Spectroradiometer device and applications of same |
| CN106225925A (en) * | 2016-08-09 | 2016-12-14 | 北京博晖创新光电技术股份有限公司 | Beam splitter, spectrogrph |
-
2019
- 2019-10-12 CN CN201910966331.3A patent/CN110823378A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140247442A1 (en) * | 2010-07-27 | 2014-09-04 | Microptix Technologies, Llc | Spectroradiometer device and applications of same |
| CN102323219A (en) * | 2011-05-30 | 2012-01-18 | 中国科学院合肥物质科学研究院 | Portable device for remotely measuring atmospheric pollution components day and night on basis of natural celestial body light source |
| CN102854893A (en) * | 2011-06-28 | 2013-01-02 | 吴昌德 | Device for tracking sunlight irradiation direction |
| CN102997996A (en) * | 2012-11-30 | 2013-03-27 | 中国科学院上海技术物理研究所 | Shortwave infrared day and night remote multispectral imager and imaging method |
| CN202994134U (en) * | 2013-01-10 | 2013-06-12 | 齐齐哈尔大学 | Sunlight incident angle photoelectric detection device |
| CN106225925A (en) * | 2016-08-09 | 2016-12-14 | 北京博晖创新光电技术股份有限公司 | Beam splitter, spectrogrph |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233130A (en) * | 2023-08-25 | 2023-12-15 | 北京师范大学 | Portable sunlight-induced fluorescence auxiliary measuring device |
| CN117233130B (en) * | 2023-08-25 | 2024-02-27 | 北京师范大学 | Portable sunlight-induced fluorescence auxiliary measuring device |
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Application publication date: 20200221 |