CN205157054U - Novel portable near infrared spectroscopy appearance - Google Patents
Novel portable near infrared spectroscopy appearance Download PDFInfo
- Publication number
- CN205157054U CN205157054U CN201520934221.6U CN201520934221U CN205157054U CN 205157054 U CN205157054 U CN 205157054U CN 201520934221 U CN201520934221 U CN 201520934221U CN 205157054 U CN205157054 U CN 205157054U
- Authority
- CN
- China
- Prior art keywords
- micro mirror
- mirror array
- control module
- near infrared
- novel portable
- 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.)
- Expired - Fee Related
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to a spectrum field, it discloses a novel portable near infrared spectroscopy appearance, including optical unit and electronic unit, the optical unit with the electronic unit is connected, the optical unit includes infrared light source, slit, collimating mirror, wave filter, reflection diffraction grating, focusing lens, digital micro mirror array and gathers lens, infrared light source, slit, collimating mirror, wave filter, reflection diffraction grating, focusing lens, digital micro mirror array and collection lens are arranged in proper order. The beneficial effects of the utility model are that: replaced traditional linear array detector, come to select and reach same effect through the single -point detector the wavelength through digital micro mirror technique.
Description
Technical field
The utility model relates to spectral range, particularly relates to a kind of novel portable near infrared spectrometer.
Background technology
Spectrum is a kind of powerful technology, is realize judging to the absorption of the light of different wave length or radiation variation situation by material to the identification of physical material and sign.The uptake of the light of each wavelength is the molecular composition depending on material, and this absorbance log is specific for material, has the effect of chemical fingerprint.
Spectrometer is exactly the instrument of the light absorption situation of change can measuring material.Portable spectroanalysis instrument can be used for the detection analysis that food, pharmacy, oil and natural gas, medical treatment, safety and other emerging industries provide performance obtained in laboratory level.
Be all at present generally conventional line array detector to realize spectral analysis, but existing spectrometer often poor-performing, cost is very high, and Signal catching capability is poor.
Summary of the invention
In order to solve the problems of the prior art, the utility model provides a kind of novel portable near infrared spectrometer, and solve poor-performing in prior art, cost is very high, and the problem of Signal catching capability difference.
The utility model provides a kind of novel portable near infrared spectrometer, comprises optical unit and electronic unit, and described optical unit is connected with described electronic unit; Described optical unit comprises infrared light supply, slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array and collection lens, and described infrared light supply, slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array and collection lens are arranged in order; Described electronic unit comprises main control module, data acquisition module and micro mirror array control module, and described main control module connects described data acquisition module and described micro mirror array control module respectively.
As further improvement of the utility model, described digital micromirror array connects described micro mirror array control module; Described collection lens connect described data acquisition module; Described infrared light supply connects described micro mirror array control module.
As further improvement of the utility model, described main control module comprises main control chip, peripheral interface, battery charger, SD card connector and Temperature Humidity Sensor; Described main control chip connects described peripheral interface, battery charger, SD card connector and Temperature Humidity Sensor respectively.
As further improvement of the utility model, described data acquisition module comprises detector, amplifying circuit, analog to digital converter and infrared sensor; Described detector connects described analog to digital converter by amplifying circuit; Described infrared sensor connects described detector.
As further improvement of the utility model, described micro mirror array control module comprises power management chip, micro mirror array controller and light source driver module; Described light source driver module connects described infrared light supply; Described micro mirror array controller connects described digital micromirror array; Described power management chip connects described micro mirror array controller.
The beneficial effects of the utility model are: instead of conventional line array detector, to be selected and reach same effect by single-point detector by digital micromirror technologies to wavelength; Have higher performance, compared to the small pixel unit that linear array detector uses, this product design obtains better performance by using larger single-point 1mm detector simultaneously; More low cost, makes cost greatly reduce by the organic assembling of the optics using single-point detector and low cost; The digital micromirror technologies adopted, its high resolving power performance allows self-defined pattern to make up the optical distortion of each cellular system; Better Signal catching capability, is not only and has larger daylight rate compared to traditional technology, and uses quick, flexible, programmable mode device and spectral filter, and the seizure analysis ability of signal is significantly strengthened.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the utility model novel portable near infrared spectrometer.
[embodiment]
To illustrate below in conjunction with accompanying drawing and embodiment further illustrates the utility model.
A kind of novel portable near infrared spectrometer, comprise optical unit and electronic unit, described optical unit is connected with described electronic unit; Described optical unit comprises infrared light supply, slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array and collection lens, and described infrared light supply, slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array and collection lens are arranged in order; Described electronic unit comprises main control module, data acquisition module and micro mirror array control module, and described main control module connects described data acquisition module and described micro mirror array control module respectively.
Described digital micromirror array connects described micro mirror array control module; Described collection lens connect described data acquisition module; Described infrared light supply connects described micro mirror array control module.
Described main control module comprises main control chip, peripheral interface, battery charger, SD card connector and Temperature Humidity Sensor; Described main control chip connects described peripheral interface, battery charger, SD card connector and Temperature Humidity Sensor respectively.
Described data acquisition module comprises detector, amplifying circuit, analog to digital converter and infrared sensor; Described detector connects described analog to digital converter by amplifying circuit; Described infrared sensor connects described detector.
Described micro mirror array control module comprises power management chip, micro mirror array controller and light source driver module; Described light source driver module connects described infrared light supply; Described micro mirror array controller connects described digital micromirror array; Described power management chip connects described micro mirror array controller.
In one embodiment, this portable spectroanalysis instrument it comprise the assemblies such as digital micromirror array device, micromirror controller, power management, governor circuit, data acquisition unit, instrument internal design can the spectral range of support performance between 700nm to 2500nm.
In another embodiment, the light of varying strength is made selectively to enter detector by the often row pixel number on control figure micromirror array device; The different resolution of system is realized by the width of the row in control figure micro mirror array device; Use Hadamard (Hadamard) set of patterns to make the light catching multiple wavelength under each pattern, and the light of single wavelength can be retrieved by decoding program; The single point in time of digital micro-mirror module under each mode of operation can open the micro mirror array panel pixel point of 50%, and these pixels will guide larger signal to detector; User can customize spectral filter and goes to select to specify interested spectrum.
In one embodiment, as Fig. 1, instrumental optics part comprises infrared light supply, input slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array, collection lens, single-point detector etc.Electronic system comprises: microprocessor control circuit, digital micro-mirror light control and treatment circuit, detector circuit and digital micromirror array device etc.Gui interface or trigger sweep button send command messages, main control unit is delivered to through USB interface or blue tooth interface, after main control unit resolve command message, send the AD HOC parameter of a series of single wavelength to micro mirror array controller, micromirror controller controls and the state of synchronous micro mirror array, the adc data collecting work that simultaneously data acquisition circuit completes detector is given primary controller and is done digital signal processing, after completing digital signal processing, process data and result data are cached in sdram memory by primary controller, then datagraphic is shown, and in the form of a file each supplemental characteristic is saved in local storage according to user's request.
Optical unit:
This part comprises one movably to reflect sampling module.Reflecting module contains two bimirror broadband tungsten filament lamp sources, before sample is placed on sapphire window, instrument is in single pass process, and light source sends near infrared light, the near infrared light of absorption of sample specific quantity, and the unabsorbed light of diffuse reflection enters instrument system.
Instrument is that illumination is at a certain angle mapped on sample when test sample, mirror-reflection can be made like this to be collected, and can collect and focus on diffuse light to slit; Sample need directly be placed in sapphire window, radiation source is designed to lens termination light, the front end of glass bead defines lens, and the opticpath of two angles meets on lens set vision cone, and the light from filament more can be directed to sample testing area by lens; Coming from diffusing of sample to collect by gathering lens, and focusing on optical alignment mirror by input slit; Wherein the size of slit is selected to be used for balancing the resolution of instrument and signal to noise ratio (S/N ratio); This product design adopts the slit that 25um is wide and 1.69mm is high.First order collimation lens is passed through by the light of slit, and the bandpass filter that 885nm is long, then light arrives reflection grating.
Angle pencil of ray is dispersed into the light of each formation wavelength by grating in conjunction with condenser lens; The slit image that condenser lens is formed projects on digital micromirror array device, in process the different wave length of slit image only horizontal transmission on digital micromirror array device, in the optical system of this instrument, image definition is in 900nm to 1700nm in scope by design, and its wavelength coverage order correspondence mappings is to the two ends of digital micromirror array device; When the row of specific digital micromirror array are selected to open or tilt+17 ° of positions, the directed collection lens that pass through of the reflected energy of row are selected to arrive single pixel InGaAs(indium gallium arsenic) detector, and other column selection closedowns of digital micromirror array or degree of tilt are when being-17 ° of positions, can will do not transferred to the bottom of micro mirror element engine by the light selected, make non-selected light away from detector, thus do not affect the measurement of selected light.
The other one large benefit of this Optical System Design is exactly the mechanical deflection allowing slit location, grating angle and Digital Micromirror Device position; Each pixel on digital micromirror array device is about 1.17nm size, slit image is by the scope of underfill at dispersion axle two ends 10%, and spilling is seated on orthogonal axes, instrument calibration only needs that relevant wavelength is carried out adjustment with the position of the row on micro mirror array device and associates.
Electronic unit
Be made up of three parts, be respectively main control circuit, micromirror array device control circuit, detector control circuit composition.
Governor circuit comprises main control chip, peripheral interface, battery charger, SD card connector, temperature-humidity monitoring circuit.Main control chip: adopt STM32ARM microprocessor, it controls the operation of whole instrument system, processor internal operation be RTOS real time operating system, bluetooth protocol repertory, spectral analysis procedure.Peripheral interface: be mainly the interface that microcontroller provides, it is responsible for communicating with each electronic circuit, and interface is USB interface and blue tooth interface (CC2465MODN) respectively; In addition also jtag port is comprised, SPI, UART, GPIO; Battery charger: instrument adopts the lighium polymer of 3.7v or lithium ion battery to power, and during charging, is charged the battery through bq24250 chip by USB interface, and by the temperature conditions of thermistor monitoring battery when charging; SD card connector: when instrument can not be connected on PC, support the exterior storage to scan-data.Temperature-humidity monitoring circuit: adopt HDC1000 sensor, for Current Temperatures and the humidity condition of surveying instrument work.
Micro mirror array control circuit comprises PMIC power management chip, micro mirror array controller, light source driver module.Wherein PMIC power management chip provides power management for micromirror array device; Micro mirror array controller receives from the pattern configurations parameter of master control ARM chip and data by 24bitRGB bus; Pattern information is also correctly configured in Digital Micromirror Device by micro mirror array controller interpretive model information, and all signals of synchronous micro mirror array device, directly can control separately single mirror status; Light source driver module provides steady current near infrared lamp.
Data acquisition circuit comprises low noise trans-impedance amplifier, ADC analog to digital converter, thermopile sensor, low noise high precision electro potential source, high speed operation amplifier; Wherein low noise trans-impedance amplifier adopts OPA2376, and it is responsible for amplifying from InGaAs(indium gallium arsenic) signal of detector is to ADC modulus sampling thief; ADC analog to digital converter adopts ADS1255 chip, and the digital signal that the amplifying signal signal of indium gallium arsenic detector converts 24bit to is carried out digital processing to microprocessor by it.Thermopile sensor adopts TMP006 chip, and it is responsible for measuring the temperature of indium gallium arsenic detector and the temperature of instrument system inside.Low noise high-precision power adopts REF5025 chip, and it provides 2.5 volts of reference voltages for trans-impedance amplifier; High speed operation amplifier adopts OPA350 chip, and it is responsible for the 2.5V reference voltage of buffer memory trans-impedance amplifier.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.
Claims (5)
1. a novel portable near infrared spectrometer, is characterized in that: comprise optical unit and electronic unit, and described optical unit is connected with described electronic unit; Described optical unit comprises infrared light supply, slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array and collection lens, and described infrared light supply, slit, collimating mirror, wave filter, reflecting diffraction grating, condenser lens, digital micromirror array and collection lens are arranged in order; Described electronic unit comprises main control module, data acquisition module and micro mirror array control module, and described main control module connects described data acquisition module and described micro mirror array control module respectively.
2. novel portable near infrared spectrometer according to claim 1, is characterized in that: described digital micromirror array connects described micro mirror array control module; Described collection lens connect described data acquisition module; Described infrared light supply connects described micro mirror array control module.
3. novel portable near infrared spectrometer according to claim 1, is characterized in that: described main control module comprises main control chip, peripheral interface, battery charger, SD card connector and Temperature Humidity Sensor; Described main control chip connects described peripheral interface, battery charger, SD card connector and Temperature Humidity Sensor respectively.
4. novel portable near infrared spectrometer according to claim 1, is characterized in that: described data acquisition module comprises detector, amplifying circuit, analog to digital converter and infrared sensor; Described detector connects described analog to digital converter by amplifying circuit; Described infrared sensor connects described detector.
5. novel portable near infrared spectrometer according to claim 1, is characterized in that: described micro mirror array control module comprises power management chip, micro mirror array controller and light source driver module; Described light source driver module connects described infrared light supply; Described micro mirror array controller connects described digital micromirror array; Described power management chip connects described micro mirror array controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520934221.6U CN205157054U (en) | 2015-11-19 | 2015-11-19 | Novel portable near infrared spectroscopy appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520934221.6U CN205157054U (en) | 2015-11-19 | 2015-11-19 | Novel portable near infrared spectroscopy appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205157054U true CN205157054U (en) | 2016-04-13 |
Family
ID=55692735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520934221.6U Expired - Fee Related CN205157054U (en) | 2015-11-19 | 2015-11-19 | Novel portable near infrared spectroscopy appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205157054U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338491A (en) * | 2016-08-17 | 2017-01-18 | 中国计量大学 | Fake milk powder discriminating unit |
| CN106370642A (en) * | 2016-08-17 | 2017-02-01 | 中国计量大学 | Portable Raman spectrometer specially for detecting foods and drugs |
| CN107255625A (en) * | 2017-06-19 | 2017-10-17 | 山东大学 | One kind is based on Embedded tea-leaf producing area identification device and its application |
| CN114441474A (en) * | 2022-04-07 | 2022-05-06 | 安徽中科谱康科技有限公司 | Near-infrared spectrometer and control method and system thereof |
-
2015
- 2015-11-19 CN CN201520934221.6U patent/CN205157054U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338491A (en) * | 2016-08-17 | 2017-01-18 | 中国计量大学 | Fake milk powder discriminating unit |
| CN106370642A (en) * | 2016-08-17 | 2017-02-01 | 中国计量大学 | Portable Raman spectrometer specially for detecting foods and drugs |
| CN107255625A (en) * | 2017-06-19 | 2017-10-17 | 山东大学 | One kind is based on Embedded tea-leaf producing area identification device and its application |
| CN114441474A (en) * | 2022-04-07 | 2022-05-06 | 安徽中科谱康科技有限公司 | Near-infrared spectrometer and control method and system thereof |
| CN114441474B (en) * | 2022-04-07 | 2022-07-01 | 安徽中科谱康科技有限公司 | Near-infrared spectrometer and control method and system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205157054U (en) | Novel portable near infrared spectroscopy appearance | |
| CN103344329B (en) | Handheld optical irradiance meter and correction method thereof | |
| CN107044959B (en) | Micro- multi-modal fusion spectral detection system | |
| CN107084790A (en) | Smartphone-based portable spectrometer and its spectral detection method | |
| CN103487408A (en) | Portable field glass transmittance and reflectivity testing spectrophotometer | |
| CN105651728A (en) | Portable near-infrared spectrum detection system | |
| CN102890070A (en) | Near infrared spectrum analyzer for quality of agricultural product based on micro electro-mechanical technology | |
| CN206696177U (en) | A kind of Portable near infrared multi-channel spectrometer | |
| CN104535526A (en) | Linear gradual filter type handheld intelligent spectrometer based on microcomputer Edison | |
| CN202189010U (en) | Optical detection system for spectrophotometer of automatic biochemical analyzer | |
| CN109596215A (en) | A kind of portable unit and its spectral method of detection based on smart phone measure spectrum | |
| CN201434838Y (en) | A Portable Field Reflectance Test Spectrophotometer | |
| CN203337259U (en) | Hand-held optical radiation meter | |
| CN201788150U (en) | Near infrared detector based on fixed grating and CCD technology | |
| CN105334166A (en) | Dual-detector near-infrared spectroscopy used for food composition analysis | |
| CN104406941A (en) | Multifunctional food safety comprehensive detector | |
| CN208383717U (en) | Food-safety detecting instrument | |
| CN208255060U (en) | A kind of portable glue class Chinese medicine optical detector | |
| CN100480679C (en) | Measurement and measuring device for crop crown layer pigment ratio | |
| CN203287309U (en) | Double-cavity methane gas concentration sensitive detection device | |
| CN2504616Y (en) | Spectrum chroma measurer | |
| CN107807118A (en) | A kind of handheld Raman spectrometer based on refrigeration mode back lighting type CCD | |
| CN207937068U (en) | Imaging spectrometer wavelength high precision automatic calibration device | |
| CN115356296A (en) | A portable nondestructive detection device and method for leaf chlorophyll a and b content | |
| CN108827889A (en) | A kind of glue class material discrimination method based on optical characteristics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20171119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |