CN105628643A - Portable mineral infrared spectrometer - Google Patents
Portable mineral infrared spectrometer Download PDFInfo
- Publication number
- CN105628643A CN105628643A CN201410600262.1A CN201410600262A CN105628643A CN 105628643 A CN105628643 A CN 105628643A CN 201410600262 A CN201410600262 A CN 201410600262A CN 105628643 A CN105628643 A CN 105628643A
- Authority
- CN
- China
- Prior art keywords
- infrared spectrometer
- integrating sphere
- portable mineral
- control system
- light
- 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
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a portable mineral near-infrared spectrometer suitable for field application. The portable mineral near-infrared spectrometer comprises a sample, a light source, and a detector; the light source is collimated to a chopper via a lens system; the chopper is connected with an integrating sphere via a beam splitting system; one end of the integrating sphere is provided with a sample cell; the integrating sphere is connected with an amplification system via a sensor; the amplification system is connected with a data acquisition module; the data acquisition module is connected with an upper control system via serial ports; and the upper control system is connected with a wave scanning driving device via a single-chip microcomputer control system. The portable mineral near-infrared spectrometer can be used for measuring targets directly; measuring precision is high; measuring speed is high; investment and operation cost are low; structure design is reasonable and convenient; size is small; and the portable mineral near-infrared spectrometer is capable of satisfying basic requirements of field application.
Description
Technical field
The present invention relates to the Portable Mineral NIR Spectrometer of a kind of applicable field studies.
Background technology
Near infrared spectrum NIRS (NearInfraredSpectra) belongs to molecular vibration spectrum, is frequency multiplication and the sum of fundamental frequencies of fundamental frequency molecular vibration, comprises abundant hydrogen group (C H, o H, S H, N H book characteristic information. When molecule is subject near infrared light irradiation, be excited generation resonance, thus light absorbing part energy. Measure its absorbing light, the collection of illustrative plates of reflection measured matter feature, i.e. absorption spectrum can be obtained. Many materials have abundant absorption spectrum near infrared region, and every kind of composition has its Absorption Characteristics, therefore can according to the composition of the near-infrared spectrum analysis material of material and content.
After the eighties in 20th century, along with developing rapidly of computer technology, and the good result that chemometrics method obtains in solving withdrawing spectral information and eliminating ambient interferences, the combination of digitized spectral instrument and chemometrics method indicates the formation of Modern Near-Infrared Spectroscopic Techniques. According to the moieties functional group absorption characteristic near infrared light in mineral, it is thus achieved that the information of its material composition and content. Traditional ensaying needs to work in laboratory environments. Field geological work person cannot on-site measurement rock forming mineral composition, can only from field sampling, return to laboratory be analyzed identify, seriously constrain field geological work. Traditional detection destroys sample, contaminated environment; Certainty of measurement is low, speed is slow; Seriously constrain the time of measurement and produced social benefit.
Summary of the invention
Adopt monochromatic light road raster scanning to solve the problems referred to above present invention, devise a kind of mineral infrared spectrometer portable, full spectrum continuously.
The present invention is achieved through the following technical solutions:
Portable mineral infrared spectrometer, including sample, light source and detector, it is characterised in that: light source is modulated on chopper by lens combination; Chopper is connected with integrating sphere by beam splitting system, the other end of this integrating sphere is provided with sample cell, integrating sphere is by sensor transmissions to amplification system simultaneously, amplification system is connected with data acquisition module, data acquisition module is by Serial Port Transmission on top level control system, and top level control system is connected with ripple turntable driving by single-chip computer control system.
Described integrating sphere is connected to detector.
Described beam splitting system adopts intersection multiple folding monochromatic light road raster scanning structure mouth.
Described light-source system selects halogen tungsten lamp.
The technique effect that the present invention is useful:
Complex light light source sent by chopper is modulated, light after modulation is by the near infrared light obtaining designated band after beam splitting system light splitting, this light is radiated at through integrating sphere on the sample cell being positioned at the integrating sphere other end, the light returned from its surface diffuse reflectance after having an effect with sample is after integrating sphere inner homogeneous, shine on sensor, it is changed into the signal of telecommunication, digital signal is converted to by data acquisition module after being nursed one's health by amplification system module, by Serial Port Transmission to portable machine, upper layer software (applications) per sample and the detection signal of background draw reflectance or the absorbance spectrum data of sample, and show its spectrogram. target can be directly measured by the present invention, certainty of measurement is high, and measuring speed is fast, investment and the low feature of operating cost, design rational in infrastructure, simple and direct, small volume, be suitable for the basic demand of field studies.
Accompanying drawing explanation
Fig. 1 Portable mineral near infrared spectrometer structure chart of the present invention.
Fig. 2 Portable mineral near infrared spectrometer index path of the present invention.
Detailed description of the invention
Portable mineral infrared spectrometer, including sample, light source and detector, it is characterised in that: light source is modulated on chopper by lens combination; Chopper is connected with integrating sphere by beam splitting system, the other end of this integrating sphere is provided with sample cell, integrating sphere is by sensor transmissions to amplification system simultaneously, amplification system is connected with data acquisition module, data acquisition module is by Serial Port Transmission on top level control system, and top level control system is connected with ripple turntable driving by single-chip computer control system.
Specifically, the complex light that light source is sent by instrument by chopper is modulated, light after modulation is by the near infrared light obtaining designated band after beam splitting system light splitting, this light is radiated at through integrating sphere on the sample cell being positioned at the integrating sphere other end, the light returned from its surface diffuse reflectance after having an effect with sample is after integrating sphere inner homogeneous, shine on sensor, it is changed into the signal of telecommunication, digital signal is converted to by data acquisition module after being nursed one's health by amplification system module, by Serial Port Transmission to portable machine, upper layer software (applications) per sample and the detection signal of background draw reflectance or the absorbance spectrum data of sample, and show its spectrogram.
Instrument light path mainly includes light-source system, chopper, beam splitting system, integrating sphere. The complex light of light source (selection halogen tungsten lamp) is modulated by chopper after being focused on by lens combination. Light after modulation is carried out light splitting by beam splitting system, forms the spectrum of a series of each spectral coverage by the arrangement of wavelength size order. Beam splitting system adopts intersection multiple folding monochromatic light road raster scanning structure mouth, solves the contradiction between system unit installing space and system bulk, both provided enough installing spaces for integrating sphere and chopper, and the system of in turn ensure that meets the requirement that overall volume is little. Utilizing motor to rotate the incident angle changing grating, make the monochromatic light of required wave band penetrate from exit slit successively, be radiated on sample through integrating sphere, after sample diffuse-reflectance, its multiple reflections is accumulated by integrating sphere. Detector is sent to circuit part after the wavelength continuous print monochromatic light comprising sample message after this accumulation is carried out opto-electronic conversion and processes.
Light-source system adopts fine tuning structure to ensure, and the filament of halogen tungsten lamp is imaged on the entrance slit of beam splitting system exactly. The direct current light signal that chopper (is also called chopper or manipulator) and is sent by light source is converted to AC signal so that amplifying and suppressing noise. Integrating sphere entrance window is installed on outgoing place of beam splitting system, makes the emergent light full illumination as far as possible of beam splitting system at sample window, to reduce the background signal of system; Its detecting window connects detector, should ensure that sample measured position and detector accept position and be positioned on integrating sphere inwall sphere simultaneously as far as possible.
Instrument of the present invention, light path design have employed the multiple folding monochromatic light road of intersection, Machine Design adopts precision parts, micro-adjusting mechanism structure, circuit design adopts locking amplify, synchronize the method for detecting weak signals such as accumulation and adopt low power dissipation design and discontinuous working method. Target can be directly measured by the present invention; Certainty of measurement is high, and measuring speed is fast; Investment and the low feature of operating cost; Design rational in infrastructure, simple and direct, small volume, be suitable for the basic demand of field studies.
Claims (4)
1. Portable mineral infrared spectrometer, including sample, light source and detector, it is characterised in that: light source is modulated on chopper by lens combination; Chopper is connected with integrating sphere by beam splitting system, the other end of this integrating sphere is provided with sample cell, integrating sphere is by sensor transmissions to amplification system simultaneously, amplification system is connected with data acquisition module, data acquisition module is by Serial Port Transmission on top level control system, and top level control system is connected with ripple turntable driving by single-chip computer control system.
2. Portable mineral infrared spectrometer as claimed in claim 1, it is characterised in that: described integrating sphere is connected to detector.
3. Portable mineral infrared spectrometer as claimed in claim 1, it is characterised in that: described beam splitting system adopts intersection multiple folding monochromatic light road raster scanning structure mouth.
4. Portable mineral infrared spectrometer as claimed in claim 1, it is characterised in that: described light-source system selects halogen tungsten lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410600262.1A CN105628643A (en) | 2014-10-31 | 2014-10-31 | Portable mineral infrared spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410600262.1A CN105628643A (en) | 2014-10-31 | 2014-10-31 | Portable mineral infrared spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105628643A true CN105628643A (en) | 2016-06-01 |
Family
ID=56043781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410600262.1A Pending CN105628643A (en) | 2014-10-31 | 2014-10-31 | Portable mineral infrared spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105628643A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551522A (en) * | 2020-06-17 | 2020-08-18 | 中国科学院南京地理与湖泊研究所 | Method for quantifying ratio of goethite to hematite in sediment by diffuse reflection spectrum |
-
2014
- 2014-10-31 CN CN201410600262.1A patent/CN105628643A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551522A (en) * | 2020-06-17 | 2020-08-18 | 中国科学院南京地理与湖泊研究所 | Method for quantifying ratio of goethite to hematite in sediment by diffuse reflection spectrum |
| CN111551522B (en) * | 2020-06-17 | 2021-03-02 | 中国科学院南京地理与湖泊研究所 | Method for quantifying ratio of goethite to hematite in sediment by diffuse reflection spectrum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2874476Y (en) | Terahertz time domain spectral instrument based on optical rectification | |
| CN105277503B (en) | Multicomponent gas while detection means and method based on two amounts son cascade laser spectrum | |
| CN101793678B (en) | Spectrum measuring device and method of scattering substance of sample cell with isosceles triangle cross section | |
| CN204556499U (en) | The multi-channel high-speed data acquisition and processing system of tuning diode absorption spectrum | |
| CN106802288A (en) | Gas-detecting device and method based on tunable laser and super continuous spectrums laser | |
| CN103630523A (en) | Laser induction spectrum generating device used for water quality optical analyzer | |
| CN104132911A (en) | Open type long optical distance CO and CH4 online testing instrument | |
| CN101819140A (en) | Continuous monitoring device and method of gaseous elemental mercury concentration | |
| CN206772821U (en) | A kind of device of the lossless quick detection of raw meat freshness | |
| CN107037004A (en) | A kind of TDLAS detects SF6The device and method of humidity in electrical equipment | |
| CN105606562B (en) | A kind of near-infrared diffusing reflection automatically corrects probe | |
| CN114384045A (en) | System and method for detecting trace gas concentration and path length in real time | |
| CN109975234A (en) | A kind of miniaturization methylene oxide detecting instrument based on middle infrared LED absorption spectrum | |
| CN102928081B (en) | Acousto-optic adjustable filtering type near-infrared spectrometer | |
| CN106404743A (en) | Raman spectrum and near infrared spectrum combined detection method and detection device | |
| CN101097185A (en) | Combined light source of multifunctional atomic absorption spectrometer | |
| CN102519905A (en) | Method for detecting automobile exhaust gas | |
| CN101545862B (en) | Device for detecting content of suspended lead in air | |
| CN2938081Y (en) | Pocket near-infrared fibre-optical spectral device | |
| CN113075684B (en) | Novel sand's atmosphere laser radar based on TDLAS technology | |
| CN106483098A (en) | The alcohol gas concentration method of telemetering based on tunable laser | |
| CN103528988A (en) | Portable near-infrared analyzer | |
| CN103528984A (en) | Optical grating type near infrared analyzer | |
| CN105628643A (en) | Portable mineral infrared spectrometer | |
| CN207007711U (en) | A kind of TDLAS detects SF6The device of humidity in electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |
|
| WD01 | Invention patent application deemed withdrawn after publication |