CN104535526A - Linear gradual filter type handheld intelligent spectrometer based on microcomputer Edison - Google Patents
Linear gradual filter type handheld intelligent spectrometer based on microcomputer Edison Download PDFInfo
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Abstract
The invention discloses a linear gradual filter type handheld intelligent spectrometer based on a microcomputer Edison and relates to the field of near-infrared spectroscopy. The problems that the detection function is single and the spectrum cannot be completely detected in the existing near-infrared spectrometer. Light rays of a light source group are sequentially subjected to frosted glass homogenization, cylindrical mirror condensation and linear gradual filter beam-splitting treatment and enter a linear array CMOS detector; an analog signal output by the detector is subjected to operational amplifier adjustment by a signal processor so as to output the analog signal and is transmitted to an analog/digital converter by virtue of a voltage follower; the analog signal is converted into a digital signal by the analog/digital converter and is transmitted to the microcomputer Edison; the digital signal is subjected to analytical processing so as to acquire the spectrum data by virtue of the microcomputer Edison; the spectrum data is displayed by a liquid crystal touch screen; the microcomputer Edison is connected with a network by using a WIFI module; and the spectrum data is uploaded to a network database, and a spectrometer analysis model stored inside the microcomputer Edison is updated. The handheld intelligent spectrometer disclosed by the invention is small in size and compact in structure and can be arranged in a pocket to take along.
Description
Technical field
The present invention relates near infrared spectrometer technical field, be specifically related to a kind of linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison.
Background technology
Spectrometer, particularly near infrared spectrometer, may be used for food inspection, can detect fruit sugar, residues of pesticides, edible oil quality, is multiduty spectral analysis apparatus, may be used for daily life.Near-infrared spectrum analysis, based on chemometrics method, all needs corresponding analytical model for often kind of analysis ingredient, and the product needed producer of civil nature provides a large amount of analytical models and constantly updates according to applicable cases.
The beam splitters such as existing micro spectrometer many uses grating, are difficult to make very little hand-held instrument.Occurred in recent years using the spectrometer that gradual filter is beam splitter, and made spectrometer volume compacter, be well suited for applying the hand-held spectrometer system that this element design can work independently.The electronic equipment such as portable medical, intelligent terminal rises, a lot of portable checkout equipment or mobile terminal are there is, the major companies such as Intel provide a lot of integration and solve platform, these platform features are powerful, peripheral hardware is complete, can independent composition measuring apparatus can being connected with the portable equipment such as mobile phone, micro spectrometer is combined with these intelligent platforms can the powerful hand-held instrument of composition function.Had some smart machines at present, can detect the compositions such as inferior ammonium nitrate, equipment relatively intelligent, can be connected by bluetooth with mobile phone, but these equipment principles are according to conductivity or use one or two wavelength, measuring ability is more single.
At present, detect complete spectrum by near-infrared spectral analytical method, especially adopt the handheld-type intelligent spectrometer of chemometrics method detection have not been reported.
Summary of the invention
In order to the measuring ability solving the existence of existing near infrared spectrometer is single, the problem of complete spectrum cannot be detected, the invention provides a kind of linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison.
The technical scheme that the present invention adopts for technical solution problem is as follows:
Linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison of the present invention, comprise: housing, be fixed on the light source group of enclosure interior, frosted glass, cylindrical mirror, linear variable filter, linear array cmos detector, signal processor, lithium battery, microcomputer Edison, analog to digital converter, 3.3V power supply, voltage reference and charging manager, be fixed on master switch and the liquid crystal touch control screen of outside;
Described light source group, frosted glass, cylindrical mirror and linear array cmos detector set gradually, described linear variable filter is attached to linear array cmos detector front surface, described linear array cmos detector, signal processor, analog to digital converter is connected successively with voltage reference, described lithium battery, charging manager is connected successively with master switch, described linear array cmos detector, signal processor, analog to digital converter, master switch, liquid crystal touch control screen is all connected with 3.3V power supply with voltage reference, described linear array cmos detector, analog to digital converter, master switch is all connected with microcomputer Edison with liquid crystal touch control screen,
The light of described light source group is successively through frosted glass homogenizing, cylindrical mirror optically focused, be incident on linear array cmos detector after linear variable filter light-splitting processing, by liquid crystal touch control screen to microcomputer Edison sending controling instruction, microcomputer Edison transmits control signal respectively to linear array cmos detector and analog to digital converter, now the light signal of reception is converted to electric signal transmission to signal processor by linear array cmos detector, electric signal is outputting analog signal be transferred to analog to digital converter by voltage reference after the adjustment of signal processor amplifier, simulating signal converts digital data transmission to microcomputer Edison through analog to digital converter, microcomputer Edison uses the spectral data analysis process software of its inside to carry out analyzing and processing to digital signal and obtains spectroscopic data, chemometrics method is adopted to obtain material composition information from spectroscopic data, spectroscopic data and composition information are stored in the storage space of microcomputer Edison inside simultaneously, spectroscopic data and composition information is shown by liquid crystal touch control screen display, microcomputer Edison uses the WIFI module of its inside connected to the network, uploads spectroscopic data as required to network data base, the spectrometer analysis model upgrading microcomputer Edison internal reservoir.
Described light source group is made up of six identical light sources, and six source symmetric are fixed on both sides, frosted glass front end; Described light source is miniature halogen lamp or LED.
The spectral range of described linear variable filter is 600nm ~ 1100nm; Described lithium battery adopts 3.7V lithium polymer battery, for microcomputer Edison powers.
Described linear array cmos detector adopts the ELIS-1024 of Dynamax company, there are 1024 pixels, control pixel by M0, M1 two pins to merge, the pixel resolution of 1024,512,256,128 can be realized, acquiescence pixel resolution is 256 pixels, is automatically adjusted the integral time of linear array cmos detector according to light intensity magnitude by software.
The amplifier that described signal processor is OPA320 mainly through two models realizes.
Described microcomputer Edison with the I/O mouth socket of 70 pins, long 35.5mm, wide 25mm, height is no more than 3.9mm; Double-core 500MHz, inside is provided with operating system and spectral data analysis process software; The internal storage space of inner integrated 1GB LPDDR3 and 4G, for storing spectroscopic data and spectrometer analysis model, meets the demand of near-infrared analysis to arithmetic capability and storage space; Embedded with bluetooth, WIFI module, GPS module, utilize GPS module to be that the spectroscopic data obtained increases positional information.
Described analog to digital converter adopts low-power chip ADS8860, resolution 16, the highest 1MHz of sampling rate.
The low pressure difference linear voltage regulator that described 3.3V power supply is LT1117-3.3 mainly through model realizes, the output of described low pressure difference linear voltage regulator is shielded be connected with voltage reference with linear array cmos detector, signal processor, analog to digital converter, liquid crystal touch control, for linear array cmos detector, signal processor, analog to digital converter, liquid crystal touch control screen and voltage reference provide 3.3V power supply.
Described voltage reference realizes mainly through the amplifier of model to be the voltage reference chip of REF3330 and model be OPA333, and described voltage reference provides 3V reference voltage for analog converter.
Described charging manager is charging management chip and the light emitting diode realization of XC6802 mainly through model, and the output of described charging management chip is connected with lithium battery, and for managing lithium cell charging process, described light emitting diode is used to indicate charged state.
The invention has the beneficial effects as follows:
1, hand-held intelligent spectrometer of the present invention adopts linear variable filter light splitting, adopts linear array cmos detector receiving optical signals, opticator compact conformation.
2, hand-held intelligent spectrometer of the present invention is hand-held, and volume is little, compact conformation, can be placed in pocket, can carry with.
3, hand-held intelligent spectrometer of the present invention adopts microcomputer Edison as microcontroller, remaining circuit has analog to digital conversion circuit, voltage reference circuit, electric power management circuit, Circuits System adopts the design of low-power consumption, and demand voltage is also lower, and whole spectrometer uses lithium battery power supply.
4, hand-held intelligent spectrometer calculation function of the present invention is stronger, more spectrometer analysis model can be stored, the WIFI module integrated by microcomputer Edison can carry out communication with host computers such as mobile phones, controlled by liquid crystal touch control screen, display light modal data and composition information, record position information, and can exchanges data be carried out with network data base and upgrade spectrometer analysis model.
5, hand-held intelligent spectrometer of the present invention is applicable to ordinary consumer and detects for daily bread, can carry out water content of food, sugar, fat content, oleaginousness detect, portions additive detects and the detection of edible oil kind, quality etc.
Accompanying drawing explanation
Fig. 1 is the front elevation of the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison of the present invention.
Fig. 2 is the vertical view of the spectrometer shown in Fig. 1.
Fig. 3 is the left view of the spectrometer shown in Fig. 1.
Fig. 4 is the principle schematic of the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison of the present invention.
Fig. 5 is the circuit diagram of Signal reception and process.
Fig. 6 is analog-to-digital circuit diagram.
Fig. 7 is the circuit diagram after charging manager is connected by master switch with 3.3V power supply.
In figure: 1, light source group, 2, frosted glass, 3, cylindrical mirror, 4, linear variable filter, 5, linear array cmos detector, 6, signal processor, 7, lithium battery, 8, housing, 9, microcomputer Edison, 10, analog to digital converter, 11,3.3V power supply, 12, master switch, 13, liquid crystal touch control screen, 14, voltage reference, 15, charging manager.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1, shown in Fig. 2 and Fig. 3, linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison of the present invention, primarily of light source group 1, frosted glass 2, cylindrical mirror 3, linear variable filter 4, linear array cmos detector 5, signal processor 6, lithium battery 7, housing 8, microcomputer Edison 9, analog to digital converter 10, 3.3V power supply 11, master switch 12, liquid crystal touch control screen 13, voltage reference 14 and charging manager 15 form, light source group 1, frosted glass 2, cylindrical mirror 3, linear variable filter 4, linear array cmos detector 5, signal processor 6, lithium battery 7, microcomputer Edison 9, analog to digital converter 10, 3.3V power supply 11, it is inner that voltage reference 14 and charging manager 15 are all fixed on housing 8, wherein light source group 1 is positioned at inside, housing 8 front end, it is inner that lithium battery 7 is positioned at housing 8 rear end, it is outside that master switch 12 is fixed on housing 8 rear end, liquid crystal touch control screen 13 is embedded in housing 8 surface.
Spectrometer automatic light source group 1 of the present invention, can increase illumination when illumination is not enough, light source group 1 is made up of multiple identical light source, and light source can select miniature halogen lamp or LED, and light source group 1 is fixed on housing 8 front end.
In opticator, frosted glass 2 is adopted to carry out homogenizing process as entrance window to the incident light that light source group 1 sends, frosted glass 2 is fixed on center, housing 8 front end, in the present embodiment, six source symmetric in light source group 1 are fixed on both sides, frosted glass 2 front end, and namely every side, frosted glass 2 front end is provided with three.
Frosted glass 2 is light splitting part below, and cylindrical mirror 3, linear variable filter 4 and linear array cmos detector 5 set gradually, and adopts the light after cylindrical mirror 3 pairs of homogenizing process to carry out optically focused process, improves the utilization factor of light, after cylindrical mirror 3 is arranged on frosted glass 2; The light after linear variable filter 4 pairs of optically focused is adopted to carry out light-splitting processing, linear variable filter 4 is directly attached on linear array cmos detector 5 front surface, linear variable filter 4 is near cylindrical mirror 3, and the spectral range of linear variable filter 4 is 600nm ~ 1100nm.
In order to the function realizing near-infrared spectrum analysis needs powerful arithmetic capability and larger storage space, simultaneously in order to network data base Switched Optical modal data and upgrade spectrometer analysis model, spectrometer of the present invention employs the microcontroller of microcomputer Edison 9 as whole spectrometer, microcomputer Edison 9 is the circuit board of one piece of SD card size, there is the I/O mouth socket of 70 pins, the long 35.5mm of microcomputer Edison 9, wide 25mm, height is no more than 3.9mm, volume is little, and applicable placement in the handheld device.Microcomputer Edison 9 is double-core 500MHz, low in energy consumption, can the powerful operating system of installation function and spectral data analysis process software, can carry out rough handling, and utilize chemometrics method to carry out constituent analysis to the spectroscopic data collected; The internal storage space of integrated 1GB LPDDR3 and 4G of microcomputer Edison 9, for storing spectroscopic data and spectrometer analysis model, meets the demand of near-infrared analysis to arithmetic capability and storage space; Microcomputer Edison 9 embedded with bluetooth, WIFI module, GPS module etc., spectrometer makes full use of the communication function of the host computers such as the realization of these modules and mobile phone.
As shown in Figure 4, linear array cmos detector 5 is connected with microcomputer Edison 9 with signal processor 6 respectively, signal processor 6 is connected with analog to digital converter 10, analog to digital converter 10 is connected with microcomputer Edison 9 with voltage reference 14 respectively, transmitted control signal respectively to linear array cmos detector 5 and analog to digital converter 10 by microcomputer Edison 9, run by microcomputer Edison 9 control line array CMOS detector 5 and analog to digital converter 10, carry out spectrum data gathering.Linear array cmos detector 5 receives the light signal after linear variable filter 4 light splitting and is converted into electric signal transmission to signal processor 6, electric signal exports in analog to digital converter 10 after the amplifier adjustment of signal processor 6, simulating signal is converted to digital signal and exports in microcomputer Edison 9 by analog to digital converter 10, and voltage reference 14 is for providing 3V reference voltage for analog converter 10.
As shown in Figure 5, Signal reception and treatment circuit realize mainly through linear array cmos detector 5 and signal processor 6, the main element of circuit has: U1 is linear array cmos detector 5, linear array cmos detector 5 adopts the ELIS-1024 of Dynamax company, this model detector has 1024 pixels, control pixel by M0, M1 two pins to merge, the pixel resolution of 1024,512,256,128 can be realized, acquiescence pixel resolution is 256 pixels, is automatically adjusted the integral time of linear array cmos detector 5 according to light intensity magnitude by software; Signal processor 6 comprises two amplifier U2 and U3, and amplifier U2 and U3 all adopts amplifier OPA320; C1 ~ C6, C13, C14 all adopt 0805 encapsulation patch capacitor, and the capacitance of C1 is 10 μ F, and the capacitance of C2, C4, C6, C13, C14 is 0.1 μ F, and the capacitance of C3 and C5 is 0.01 μ F; R1 ~ R3 all adopts 0805 encapsulation Chip-R, and the resistance value of precision 1%, R1 is that the resistance value of 5k Ω, R2 and R3 is 1k Ω; GP12 interface and GP44 ~ GP49 interface are connected with the GPIO mouth of corresponding microcomputer Edison 9, the control signal of ELIS-1024 chip is provided by the GPIO mouth of microcomputer Edison 9, and the electric signal that ELIS-1024 chip exports is transferred to analog to digital converter 10 after two amplifier OPA320 amplifier adjustment; 001 is analog signal output.
As shown in Figure 6, analog to digital conversion circuit realizes mainly through analog to digital converter 10, and the main element of circuit has: U6 is analog to digital converter 10, analog to digital converter 10 adopts low-power chip ADS8860, resolution 16, the highest 1MHz of sampling rate, actual use 500KHz; U4 is voltage reference chip, model is REF3330, U5 is amplifier, model is OPA333, voltage reference 14 comprises voltage reference chip U4 and amplifier U5, analog to digital converter 10 by amplifier U5 external voltage fiducial chip U4, voltage reference chip U4 for analog converter 10 provides 3V reference voltage; C7 ~ C12 all adopts 0805 encapsulation patch capacitor, and the capacitance of C7 is the capacitance of 10 μ F, C8 is 1 μ F, and the capacitance of C9, C11 and C12 is 0.1 μ F, and the capacitance of C10 is 0.47 μ F; R4 ~ R6 all adopts 0805 encapsulation Chip-R, and the resistance value of the resistance value of precision 1%, R4 to be the resistance value of 10k Ω, R5 be 1k Ω, R6 is 2.2k Ω; GP1114 and GP12 ~ GP15 is connected with the GPIO mouth of microcomputer Edison 9, and the control signal of ADS8860 chip is provided by the GPIO mouth of microcomputer Edison 9; 002 is simulating signal input, receives 001 simulating signal in Fig. 4.
Microcomputer Edison 9 and liquid crystal touch control shield 13 and are connected, control microcomputer Edison 9 by liquid crystal touch control screen 13 to work, namely microcomputer Edison 9 utilizes the operating system of its inner installation and spectral data analysis process software to carry out analyzing and processing to the digital signal received and obtains spectroscopic data, and the spectroscopic data obtained is stored in the storage space of microcomputer Edison 9 inside, by the display interface display light modal data of liquid crystal touch control screen 13, controlling microcomputer Edison 9 by liquid crystal touch control screen 13 uses the WIFI module of its inside to realize exchanging data with network data base, and then upgrade the spectrometer analysis model of microcomputer Edison 9 internal reservoir, and spectroscopic data is uploaded in network data base, simultaneously, the GPS module that microcomputer Edison 9 is integrated can be utilized, for the spectroscopic data collected increases positional information.
In order to be applicable to hand-held use, spectrometer adopts lithium battery 7 to power, lithium battery 7 adopts 3.7V lithium polymer battery, a master switch 12 is adopted to control startup and the power supply of spectrometer Circuits System, lithium battery 7 is with charging manager 15, lithium battery 7 is connected with master switch 12 by charging manager 15, master switch 12 is directly connected with the power supply (VSYS) of microcomputer Edison 9, the self-powered chip of microcomputer Edison 9, directly powered by lithium battery 7, do not need additional power supply chip.
As shown in Figure 7, in the circuit of the charging manager 15 of lithium battery 7, main element has: U7 is charging management chip, and model is XC6802, and the output of charging management chip U7 is connected with lithium battery 7, is responsible for managing built-in lithium battery 7 charging process; D1 is light emitting diode, indicates charged state; C15 adopts 0805 encapsulation patch capacitor, and the capacitance of C15 is 1 μ F; R7 adopts 0805 encapsulation Chip-R, and precision 1%, its resistance value is 10k Ω.In the circuit of 3.3V power supply 11, main element has: U8 is low pressure difference linear voltage regulator, model is LT1117-3.3, the output of low pressure difference linear voltage regulator U8 is shielded 13 with linear array cmos detector 5, signal processor 6, analog to digital converter 10, liquid crystal touch control and is connected with voltage reference 14, for linear array cmos detector 5, signal processor 6, analog to digital converter 10, liquid crystal touch control screen 13 and voltage reference 14 provide 3.3V power supply; C16 and C17 all adopts 0805 encapsulation patch capacitor, and the capacitance of C16 is the capacitance of 10 μ F, C17 is 0.1 μ F; 003 output is powered to microcomputer Edison 9.Under the linear array cmos detector 5 of spectrometer except microcomputer Edison 9, signal processor 6, analog to digital converter 10, liquid crystal touch control screen 13 and voltage reference 14 all limit and be operated in 3.3V voltage, 3.3V power supply is obtained lithium battery 7 voltage step-down by low pressure difference linear voltage regulator U8.The circuit of the charging manager 15 of lithium battery 7 is connected by master switch 12 with the circuit of 3.3V power supply 11, and the SW1 in Fig. 6 is spectrometer battery main switch 12.
Spectrometer of the present invention adopts the Circuits System of low-voltage, super low-power consumption, and linear array cmos detector 5 is low-power consumption detector, and the part such as analog to digital conversion circuit also adopts the chip of low-power consumption, can reduce spectrometer power consumption, increases cruising time.
Claims (10)
1. based on the linear variable filter formula hand-held intelligent spectrometer of microcomputer Edison, it is characterized in that, comprise: housing (8), be fixed on the light source group (1) that housing (8) is inner, frosted glass (2), cylindrical mirror (3), linear variable filter (4), linear array cmos detector (5), signal processor (6), lithium battery (7), microcomputer Edison (9), analog to digital converter (10), 3.3V power supply (11), voltage reference (14) and charging manager (15), be fixed on the outside master switch (12) of housing (8) and liquid crystal touch control screen (13),
Described light source group (1), frosted glass (2), cylindrical mirror (3) and linear array cmos detector (5) set gradually, described linear variable filter (4) is attached to linear array cmos detector (5) front surface, described linear array cmos detector (5), signal processor (6), analog to digital converter (10) is connected successively with voltage reference (14), described lithium battery (7), charging manager (15) is connected successively with master switch (12), described linear array cmos detector (5), signal processor (6), analog to digital converter (10), master switch (12), liquid crystal touch control screen (13) is all connected with 3.3V power supply (11) with voltage reference (14), described linear array cmos detector (5), analog to digital converter (10), master switch (12) is all connected with microcomputer Edison (9) with liquid crystal touch control screen (13),
The light of described light source group (1) is successively through frosted glass (2) homogenizing, cylindrical mirror (3) optically focused, be incident on linear array cmos detector (5) after linear variable filter (4) light-splitting processing, by liquid crystal touch control screen (13) to microcomputer Edison (9) sending controling instruction, microcomputer Edison (9) transmits control signal respectively to linear array cmos detector (5) and analog to digital converter (10), now the light signal of reception is converted to electric signal transmission to signal processor (6) by linear array cmos detector (5), electric signal outputting analog signal after the adjustment of signal processor (6) amplifier is also transferred to analog to digital converter (10) by voltage reference (14), simulating signal converts digital data transmission to microcomputer Edison (9) through analog to digital converter (10), microcomputer Edison (9) uses the spectral data analysis process software of its inside to carry out analyzing and processing to digital signal and obtains spectroscopic data, chemometrics method is adopted to obtain material composition information from spectroscopic data, spectroscopic data and composition information are stored in the inner storage space of microcomputer Edison (9) simultaneously, by liquid crystal touch control screen (13) display light modal data and composition information, microcomputer Edison (9) uses the WIFI module of its inside connected to the network, uploads spectroscopic data as required to network data base, the spectrometer analysis model upgrading microcomputer Edison (9) internal reservoir.
2. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, described light source group (1) is made up of six identical light sources, and six source symmetric are fixed on frosted glass (2) both sides, front end; Described light source is miniature halogen lamp or LED.
3. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, the spectral range of described linear variable filter (4) is 600nm ~ 1100nm; Described lithium battery (7) adopts 3.7V lithium polymer battery, is microcomputer Edison (9) power supply.
4. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, described linear array cmos detector (5) adopts the ELIS-1024 of Dynamax company, there are 1024 pixels, control pixel by M0, M1 two pins to merge, the pixel resolution of 1024,512,256,128 can be realized, acquiescence pixel resolution is 256 pixels, is automatically adjusted the integral time of linear array cmos detector (5) according to light intensity magnitude by software.
5. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, is characterized in that, the amplifier that described signal processor (6) is OPA320 mainly through two models realizes.
6. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, described microcomputer Edison (9) with the I/O mouth socket of 70 pins, long 35.5mm, wide 25mm, height is no more than 3.9mm; Double-core 500MHz, inside is provided with operating system and spectral data analysis process software; The internal storage space of inner integrated 1GB LPDDR3 and 4G, for storing spectroscopic data and spectrometer analysis model, meets the demand of near-infrared analysis to arithmetic capability and storage space; Embedded with bluetooth, WIFI module, GPS module, utilize GPS module to be that the spectroscopic data obtained increases positional information.
7. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, described analog to digital converter (10) adopts low-power chip ADS8860, resolution 16, the highest 1MHz of sampling rate.
8. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, the low pressure difference linear voltage regulator that described 3.3V power supply (11) is LT1117-3.3 mainly through model realizes, the output of described low pressure difference linear voltage regulator and linear array cmos detector (5), signal processor (6), analog to digital converter (10), liquid crystal touch control screen (13) is connected with voltage reference (14), for linear array cmos detector (5), signal processor (6), analog to digital converter (10), liquid crystal touch control screen (13) and voltage reference (14) provide 3.3V power supply.
9. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, described voltage reference (14) realizes mainly through the amplifier of model to be the voltage reference chip of REF3330 and model be OPA333, and described voltage reference (14) provides 3V reference voltage for analog converter (10).
10. the linear variable filter formula hand-held intelligent spectrometer based on microcomputer Edison according to claim 1, it is characterized in that, described charging manager (15) is charging management chip and the light emitting diode realization of XC6802 mainly through model, the output of described charging management chip is connected with lithium battery (7), for managing lithium battery (7) charging process, described light emitting diode is used to indicate charged state.
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