CN111207832A - Spectrum detection system and method for fixed-frequency grating single-point sensor - Google Patents
Spectrum detection system and method for fixed-frequency grating single-point sensor Download PDFInfo
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- CN111207832A CN111207832A CN202010156344.7A CN202010156344A CN111207832A CN 111207832 A CN111207832 A CN 111207832A CN 202010156344 A CN202010156344 A CN 202010156344A CN 111207832 A CN111207832 A CN 111207832A
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- 238000001228 spectrum Methods 0.000 title claims abstract description 61
- 238000001514 detection method Methods 0.000 title claims abstract description 56
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- 238000005516 engineering process Methods 0.000 abstract description 11
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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
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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
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention provides a fixed-frequency grating single-point sensor spectrum detection system, which comprises a grating swinging piece, a swinging power source and a signal receiving piece, wherein the grating swinging piece is arranged on the grating swinging piece; a grating component is fixed at the swinging part of the grating swinging piece; the optical signal input by the grating sensor spectrum detection system is diffracted by the grating component to form line beams with different wavelengths and then is output outwards; the working method of the grating sensor spectrum detection system comprises the following steps: the grating swinging piece swings in a preset frequency period within a set swinging range under the driving of a swinging power source, so that a line beam output by the grating component forms a processable fixed-frequency signal at the signal receiving piece; the invention does not depend on the technology of a rotating grating or a digital micromirror, and can realize spectrum detection by utilizing a fixed-frequency swinging grating combined single-point detector.
Description
Technical Field
The invention relates to the technical field of optical instruments, in particular to a fixed-frequency grating single-point sensor spectrum detection system and method.
Background
In the development process of grating spectrum instruments, various spectrums are identified by adopting a grating and a photoelectric coupling sensor (CCD or CMOS) or other detectors at the early stage. In order to distinguish the spectrum with approximate wavelength and reduce the difficulty of optical signal extraction, a scholarly invents a rotary grating technology; such as a rotating grating modulation fourier transform spectrometer designed in 2002 of the integrated research of the technology of the qinghua university and the japanese national industry, and chinese invention patents CN 101464210B (grating detector) and CN 104833816B (laser doppler velocity measurement device and velocity measurement method based on rotating grating); in order to reduce the cost of the spectrum instrument, the inventor invents a linear array or an area array non-refrigeration infrared detector to replace an expensive photoelectric coupling sensor. Such as chinese invention patents CN101692456B (an InGaAs line array or area array detector integrated with filtering microstructure) and CN 104748858B (an InGaAs short wave infrared detector signal processing system); in recent years, with the popularization and application of Digital Micromirror (DMD) technology in which large-scale integrated circuit technology, micro electro mechanical system technology and micro optical technology are integrally coordinated and controlled, a grating spectrometer introduces a digital micromirror, and a spectrometer with higher cost performance and better signal extraction effect is provided. Such as chinese invention patent CN106289529 (high luminous flux spectrometer based on partitioned digital micromirror); in order to reduce the cost, a spectroscopic instrument of a single-point detector, such as CN 105527021B (a pixel-level scanning spectroscopic imaging system and imaging method based on a digital micromirror device) is introduced in china in combination with the advantages of a digital micromirror device.
However, the existing technology for extracting and identifying the wavelength close spectrum has the following main defects or inconveniences.
1. The rotary grating structure has the phenomena of easy damage and low reliability due to long service time, and the rotary structure and the motor are easy to damage; and motors with good performance and long life are expensive.
2. The motor (such as a stepping motor) is adopted to control the rotary grating, and due to the problems of the motion precision, the response time and the like of the motor, the defects of large frequency fluctuation and irregular signal change exist in the photoelectric signal processing at the rear end;
3. compared with a single-point detector, the photoelectric coupling sensor (CCD or CMOS) or a linear array or area array non-refrigeration infrared detector has the defects of high cost and more operation data;
4. the patent and the manufacturing technology of the digital micromirror with integrated light, mechanical and electrical control also master the problems of high price and poor autonomous controllability in foreign companies;
the technical problem to be solved by the application is to realize spectrum detection by utilizing a fixed-frequency swing grating combined single-point detector without depending on a rotary grating or digital micromirror technology.
Disclosure of Invention
The invention provides a spectrum detection system and a spectrum detection method for a fixed-frequency grating single-point sensor, which do not depend on a rotating grating or a digital micromirror technology, but realize spectrum detection by utilizing a fixed-frequency swinging grating combined single-point detector.
A spectrum detection system of a fixed-frequency grating single-point sensor comprises a grating swinging piece (1), a swinging power source and a signal receiving piece; a grating component (12) is fixed at the swinging part (11) of the grating swinging piece; an optical signal (3) input by the grating sensor spectrum detection system is diffracted by the grating component to form a line beam (4) with different wavelengths and is output outwards;
the working method of the grating sensor spectrum detection system comprises the following steps: the grating swinging piece swings in a preset frequency period within a set swinging range under the driving of a swinging power source, so that a line beam output by the grating component forms a processable fixed-frequency signal at the signal receiving piece (2).
The grating sensor spectrum detection system enables an optical signal input by the grating sensor spectrum detection system to reach the grating component through a slit structure or an optical fiber component.
The oscillating frequency of the grating oscillating piece does not adopt 50HZ or 60HZ multiple of the daily lighting power supply.
The swinging power source comprises a magnetic part (13) and an inductance component (14); the magnetic part is arranged at the swinging part of the grating swinging part and is positioned in the magnetic force action range of the inductance component; the inductance component is arranged at a circuit board (15) of the grating sensor spectrum detection system and is connected with a circuit system of the sensor; when the grating sensor spectrum detection system works, the inductance component applies electromagnetic force to the magnetic component of the grating swinging component, and the circuit system changes the magnetic force polarity of the inductance component according to the preset frequency so that the grating swinging component swings according to the preset frequency.
The electromagnetic drive circuit within the circuitry is similar to that of a solenoid valve.
The fixed end of the grating swinging piece is hinged to the installation surface through a hinge, and when only one end of the grating swinging piece is fixed, the grating swinging piece is molded by elastic materials.
The signal receiving part processes the line beam output by the grating part by a single-point detector.
The optical signal input by the grating sensor spectrum detection system is a light beam of an external perspective system or an external reflection system.
The grating sensor spectrum detection system is used for spectrum detection.
The grating swinging device replaces the rotating grating with the fixed-frequency swinging grating, and the grating swinging replaces the grating rotation driven by a motor, so that the extraction characteristic of the rotating grating on the wavelength close to the spectral high resolution is kept, and the problems of easy damage and low reliability of the original rotating structure are eliminated; meanwhile, the problems of low-cost motor motion precision, insufficient response time and the like are solved, and the defects of large frequency fluctuation and irregular signal change in the caused rear-end photoelectric signal processing are avoided.
The detector for receiving the light beam formed by the diffraction of the grating does not need a photoelectric coupling sensor (CCD or CMOS) or a linear array or area array uncooled infrared detector with high cost and much operation data, and can receive a required signal only by using a single-point detector, so that the extraction and identification of the wavelength approaching spectrum with low cost and high resolution can be realized.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is an optical schematic of the present invention;
FIG. 2 is a schematic view of the swing structure of the present invention;
in the figure: 1-a grating oscillating piece; 2-a signal receiving member; 3-an optical signal; 4-line beams of different wavelengths; 11-the oscillating portion of the grating oscillating piece; 12-a grating member; 13-a magnetic member; 14-an inductive component; 15-circuit board.
Detailed Description
As shown in fig. 1-2, a fixed-frequency grating single-point sensor spectrum detection system comprises a grating swinging piece 1, a swinging power source and a signal receiving piece; a grating component 12 is fixed at the swinging part 11 of the grating swinging piece; an optical signal 3 input by the grating sensor spectrum detection system is diffracted by the grating component to form a line beam 4 with different wavelengths and is output outwards;
the working method of the grating sensor spectrum detection system comprises the following steps: the grating swinging piece swings in a preset frequency period within a set swinging range under the driving of a swinging power source, so that a line beam output by the grating component forms a processable fixed-frequency signal at the signal receiving piece 2.
The grating sensor spectrum detection system enables an optical signal input by the grating sensor spectrum detection system to reach the grating component through a slit structure or an optical fiber component.
The oscillating frequency of the grating oscillating piece does not adopt 50HZ or 60HZ multiple of the daily lighting power supply.
The swinging power source comprises a magnetic part 13 and an inductance component 14; the magnetic part is arranged at the swinging part of the grating swinging part and is positioned in the magnetic force action range of the inductance component; the inductance component is arranged at a circuit board 15 of the grating sensor spectrum detection system and is connected with a circuit system of the sensor; when the grating sensor spectrum detection system works, the inductance component applies electromagnetic force to the magnetic component of the grating swinging component, and the circuit system changes the magnetic force polarity of the inductance component according to the preset frequency so that the grating swinging component swings according to the preset frequency.
The electromagnetic drive circuit within the circuitry is similar to that of a solenoid valve.
The fixed end of the grating swinging piece is hinged to the installation surface through a hinge, and when only one end of the grating swinging piece is fixed, the grating swinging piece is molded by elastic materials.
The signal receiving part processes the line beam output by the grating part by a single-point detector.
The optical signal input by the grating sensor spectrum detection system is a light beam of an external perspective system or an external reflection system.
The grating sensor spectrum detection system is used for spectrum detection.
Example (b):
when the optical grating sensor spectrum detection system is used for spectrum detection, an object to be detected is placed in an external perspective system, the perspective system generates detection light and outputs the detection light penetrating through the object to be detected to the optical grating sensor spectrum detection system, the optical grating sensor spectrum detection system optical grating swinging piece swings in a preset frequency period in a set swinging range under the driving of a swinging power source, a line beam output by the optical grating component forms a processable fixed frequency signal at the signal receiving piece 2, the signal receiving piece processes the line beam output by the optical grating component through a single-point detector, and spectrum extraction and identification are further performed on the line beam.
Claims (9)
1. The fixed-frequency grating single-point sensor spectrum detection system is characterized in that: the grating sensor spectrum detection system comprises a grating swinging piece (1), a swinging power source and a signal receiving piece; a grating component (12) is fixed at the swinging part (11) of the grating swinging piece; an optical signal (3) input by the grating sensor spectrum detection system is diffracted by the grating component to form a line beam (4) with different wavelengths and is output outwards;
the working method of the grating sensor spectrum detection system comprises the following steps: the grating swinging piece swings in a preset frequency period within a set swinging range under the driving of a swinging power source, so that a line beam output by the grating component forms a processable fixed-frequency signal at the signal receiving piece (2).
2. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the grating sensor spectrum detection system enables an optical signal input by the grating sensor spectrum detection system to reach the grating component through a slit structure or an optical fiber component.
3. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the oscillating frequency of the grating oscillating piece does not adopt 50HZ or 60HZ multiple of the daily lighting power supply.
4. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the swinging power source comprises a magnetic part (13) and an inductance component (14); the magnetic part is arranged at the swinging part of the grating swinging part and is positioned in the magnetic force action range of the inductance component; the inductance component is arranged at a circuit board (15) of the grating sensor spectrum detection system and is connected with a circuit system of the sensor; when the grating sensor spectrum detection system works, the inductance component applies electromagnetic force to the magnetic component of the grating swinging component, and the circuit system changes the magnetic force polarity of the inductance component according to the preset frequency so that the grating swinging component swings according to the preset frequency.
5. The fixed-frequency grating single-point sensor spectrum detection system of claim 4, wherein: the electromagnetic drive circuit within the circuitry is similar to that of a solenoid valve.
6. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the fixed end of the grating swinging piece is hinged to the installation surface through a hinge, and when only one end of the grating swinging piece is fixed, the grating swinging piece is molded by elastic materials.
7. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the signal receiving part processes the line beam output by the grating part by a single-point detector.
8. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the optical signal input by the grating sensor spectrum detection system is a light beam of an external perspective system or an external reflection system.
9. The fixed-frequency grating single-point sensor spectrum detection system of claim 1, wherein: the grating sensor spectrum detection system is used for spectrum detection.
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| CN202010156344.7A CN111207832B (en) | 2020-03-09 | 2020-03-09 | Spectrum detection system and method based on fixed-frequency grating and single-point sensor |
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| CN202010156344.7A CN111207832B (en) | 2020-03-09 | 2020-03-09 | Spectrum detection system and method based on fixed-frequency grating and single-point sensor |
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| CN111207832B CN111207832B (en) | 2022-08-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7283233B1 (en) * | 2004-03-20 | 2007-10-16 | Seng-Tiong Ho | Curved grating spectrometer with very high wavelength resolution |
| CN102359949A (en) * | 2011-09-20 | 2012-02-22 | 重庆大学 | High resolution micro infrared spectrometer based on MEMS scanning micromirror |
| CN106404713A (en) * | 2016-11-23 | 2017-02-15 | 重庆大学 | Double-detector micro near-infrared spectrometer with whole spectral band of 800-2,500nm |
| CN109073878A (en) * | 2016-04-05 | 2018-12-21 | 三美电机株式会社 | Single-shaft-rotation actuator |
-
2020
- 2020-03-09 CN CN202010156344.7A patent/CN111207832B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7283233B1 (en) * | 2004-03-20 | 2007-10-16 | Seng-Tiong Ho | Curved grating spectrometer with very high wavelength resolution |
| CN102359949A (en) * | 2011-09-20 | 2012-02-22 | 重庆大学 | High resolution micro infrared spectrometer based on MEMS scanning micromirror |
| CN109073878A (en) * | 2016-04-05 | 2018-12-21 | 三美电机株式会社 | Single-shaft-rotation actuator |
| CN106404713A (en) * | 2016-11-23 | 2017-02-15 | 重庆大学 | Double-detector micro near-infrared spectrometer with whole spectral band of 800-2,500nm |
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