CN202101930U - Multi-wavelength and multi-light-source diffuse reflection type color comparison device - Google Patents
Multi-wavelength and multi-light-source diffuse reflection type color comparison device Download PDFInfo
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- CN202101930U CN202101930U CN2011200249410U CN201120024941U CN202101930U CN 202101930 U CN202101930 U CN 202101930U CN 2011200249410 U CN2011200249410 U CN 2011200249410U CN 201120024941 U CN201120024941 U CN 201120024941U CN 202101930 U CN202101930 U CN 202101930U
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- diffuse reflection
- reflection type
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Abstract
The utility model relates to a multi-wavelength and multi-light-source diffuse reflection type color comparison device, which comprises a light path structure, a photoelectric detection circuit, and a casing. The photoelectric detection circuit comprises a microcontroller unit, a data acquisition unit, a constant current control unit, a display unit, and an input unit. The light path structure comprises a base platform, as well as a middle cover and a top cover which are movably connected with the base platform, a detection window is arranged on the base platform and comprises light paths corresponding to monochromatic sources with different wave lengths, and a photoelectric sensor is arranged below the detection window. A striped slit corresponding to the detection window is formed on the middle cover, a lug boss capable of being embedded into the slit is formed on the inner side of the top cover, and a changeable reflecting board is arranged on the bottom face of the lug boss in a matched manner. The light path structure of the device provided by the utility model is simple, no complex lens structures exists, the cost is low, and the installation is easy; the integral shielding performance of the light path structure is good, the disturbance and the measurement errors are small, the integral structure of the device is simple, the volume is small, the weight is light, the carrying and the use are convenient, and on-site quick measurement is available.
Description
Technical field
The utility model relates to the Photoelectric Detection field, is specifically related to a kind of multi-wavelength multiple light courcess diffuse reflection type colorimetric device.
Background technology
The technology that is used at present crop nutrition diagnosis both at home and abroad mainly contains multiple: outward appearance diagnosis, the diagnosis of leaf colour atla, the diagnosis of chlorophyll diagnostic equipment, the diagnosis of canopy color, remote sensing diagnosis, chemical diagnosis etc.Preceding two kinds all is etiologic diagnosis; The chlorophyll diagnostic equipment then is relatively to obtain a relative value (SPAD) through two kinds of wavelength lower blade penetrabilitys; Can not measure chlorophyllous real content; And the measured value degree of variation is very big, tens of times measurement just directive significance can be arranged, and the measured value of some crop is uncorrelated with the crop nitrate content; It is bigger that the colored diagnostic techniques of remote sensing technology and canopy is influenced by Soil Background, sunlight angle, air refraction, wind speed, canopy structure, still locates conceptual phase at present; Chemical diagnosis is comparatively ripe method, and two types of lab analysis method, the on-the-spot test paper rapid methoies in field are arranged at present, and the former long in cycle, cost is high, and the latter then has the visual qualitative and quantitative two kinds of methods of instrument.The reflective nitrate tester of the import of present domestic use promptly belongs to the latter.
The diffuse reflection colorimetric is diffuse spectral analysis technology and technological the combining of photoelectric colorimetry.It can adopt light emitting diode or optical filter, also can adopt the grating beam splitting technology to obtain monochromatic light; Be used for visible light or near infrared diffuse reflection colorimetric; Can realize nondestructive test, improve checkability.Current use is to be used for the quantification of test paper to detect more widely, has the advantage of the convenient quick and color comparator quantitative measurement of detection paper concurrently.What see both at home and abroad at present mainly is the RQflex reflectometer of German Merck company.It is the reflective color comparator of visible light of dual wavelength two light paths.Reflect that from domestic operating position its measuring accuracy reaches about 10% approximately, its test paper is specialized in by merck company, and other test paper is not accepted.Its structure can not be got rid of the error that test paper and environmental change bring.
Summary of the invention
The technical matters that the utility model will solve provides a kind of accuracy of detection height, favorable reproducibility and portable multi-wavelength multiple light courcess diffuse reflection type colorimetric device.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
Design a kind of multi-wavelength multiple light courcess diffuse reflection type colorimetric device; Comprise light channel structure, photoelectric detective circuit, housing; It is characterized in that said light channel structure comprises base platform, middle cover and the top cover of being processed by light-proof material, an end of said middle cover and top cover is movably connected on the base platform; On said base platform, be provided with detection window at least; Detection window is by the monochromatic source of at least two different wave lengths of corresponding optical channel correspondence, and below detection window, is provided with photoelectric sensor, in said, covers the bar shaped slit that offers corresponding said detection window; Be provided with the bar shaped boss that can be embedded in the said slit in the inboard of said top cover, be provided with to coupling replaceable reflecting plate on this boss bottom surface; Said photoelectric detective circuit comprises micro controller unit, data acquisition unit, constant current control list, display unit, input block; Passing to micro controller unit after said data acquisition unit receives the simulating signal that produces from photoelectric sensor in the light channel structure and carries out the A/D conversion handles; The signal that said constant current control module sends according to micro controller unit is the monochromatic source constant current power supply in the said light channel structure; Said display unit, input block are accomplished corresponding information and are shown and task input message by MCU controls.
Monochromatic source can adopt the LED cold light source, and wavelength commonly used has 940nm, 550nm, 660nm, can select arbitrarily according to the determinand composition etc.
The width of said bar shaped slit is close with the width of universal test paper; Said photoelectric sensor be among RGB230, opt101, spd34s, the TLS245 any one.
The incident ray of said light source and replaceable reflecting plate are 45～60 ° of angles and are provided with, to guarantee irreflexive detection sensitivity.
Also comprise serial communication circuit in the said photoelectric detective circuit, to realize the serial communication of micro controller unit and external device.
Also comprise buzzer circuit in the said photoelectric detective circuit, accomplish the task that time prompting was alarmed, was provided with to button feedback response and prompting and circuit by MCU controls.
Also comprise clock circuit in the said photoelectric detective circuit, accomplish testDate, time real time record task by MCU controls.
Said reflective crop nutrition diagnosis device is provided with built-in power.
Also comprise power control circuit in the said photoelectric detective circuit, its switching, charging of accomplishing built-in power and external power supply according to the instruction of micro controller unit detects, voltage stabilizing control.Can use dual power supply control, AC adapter external power supply and built-in lithium electricity power supply can be realized online charging.
Said micro controller unit is any one in MSP430F2XX series, 51 series monolithics, AVR single-chip microcomputer, the PIC single-chip microcomputer.
The utlity model has actively useful effect:
1. adopt visible or three kinds of wavelength light sources of near infrared, the design of three-wavelength double light path realizes the detection by quantitative of diffuse reflectance, increase by one with reference to wavelength to reduce test error to greatest extent; Adopt close to sources dimensional orientation reflecting barrier technology rather than improve measuring accuracy with the integrating sphere technology.And be reserved with the light source and the path channels of dual wavelength colourimetry or three-wavelength colorimetric simultaneously, to be used to reduce the interference of the non-mensuration composition that some test item runs into; This device is significantly improved the reappearance of test; Become to detection by quantitative for various test paper method for quick by qualitative or sxemiquantitative technological means is provided; Solve visual colorimetric determination in the blunt problem of the vision at visible region two ends, improved the precision of detection paper greatly; This device also can be used to measure the special component of solid and dusty material.
2. light channel structure is simple, and is easy to use, the complicated lens structure need be installed, and cost is low, is easy to install.The whole light path shielding of light channel structure is good, disturbs little.
4. the test error that brings is polluted in replaceable reflecting plate design in reducing to use.
5. this apparatus structure is simple, and volume is little, and is in light weight, is easy to carry, and is specially adapted to fast-field evaluation and uses.
6. this multi-wavelength multiple light courcess diffuse reflection type colorimetric device can integrate (expansion) plant nutrition, chlorophyll, poisonous and harmful substance and measures.
Description of drawings
Fig. 1 is a kind of inner structure synoptic diagram of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Fig. 2 is one of perspective view of a kind of light channel structure;
Fig. 3 be a kind of light channel structure perspective view two;
Fig. 4 is the upward view of light channel structure among Fig. 1;
Fig. 5 is the side view of light channel structure among Fig. 1;
Fig. 6 is the front view of light channel structure among Fig. 1;
Fig. 7 is a kind of circuit theory diagrams of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Fig. 8 is a kind of microcontroller circuit figure of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Fig. 9 is a kind of control circuit for light source of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Figure 10 is a kind of sensor and data acquisition circuit of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Figure 11 is a kind of buzzer circuit figure of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Figure 12 is a kind of constant current circuit of light sources figure of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Figure 13 is a kind of clock circuit of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Figure 14 is a kind of electric power management circuit of multi-wavelength multiple light courcess diffuse reflection type colorimetric device;
Among the figure, 1 is top cover, and 2 is middle cover, and 3 are the bar shaped slit, and 4 is base platform; 5 is replaceable reflecting plate, and 6 are the bar shaped boss, and 7 is detection window, and 8 is detection window, and 9,10 is single color LED; 11,12 is photoelectric sensor, and 13,14,15,16 is single color LED, and 17 is light channel structure, and 18 is sensor and circuit of light sources plate, and 19 are the communication serial ports; 20 are the adapter input, and 21 is power switch, and 22 is main control board, and 23 is lithium battery, and 24 is housing.
Embodiment
1 one kinds of multi-wavelength multiple light courcess of embodiment diffuse reflection type colorimetric device; Referring to Fig. 1～14; Comprise light channel structure 17, photoelectric detective circuit, housing 24; Said light channel structure comprises base platform 4 and the top cover of being processed by light-proof material 1, and an end of said middle cover 2 and top cover 1 all is movably connected on the base platform 4, and said base platform 4 is provided with two detection windows 7,8; Each detection window is by the monochromatic source (light emitting diode) of corresponding three different wave lengths of corresponding optical channel (940nm, 550nm, 660nm), and below two detection windows 7,8, is respectively arranged with corresponding photoelectric sensor 11,12; On said middle cover 2, offer the bar shaped slit 3 of corresponding said detection window 7,8; Be provided with the bar shaped boss 6 that can be embedded in the said slit 3 in the inboard of said top cover 1, be provided with to coupling replaceable reflecting plate 5 on these boss 6 bottom surfaces; The incident ray and the replaceable reflecting plate 5 of said light source (light emitting diode) are the 45 setting, to guarantee irreflexive detection sensitivity; Said photoelectric detective circuit comprises MSP430 microcontroller, data acquisition unit, constant current control list, display unit, input block, serial communication circuit, buzzer circuit, clock circuit, power control circuit; Pass to micro controller unit after said data acquisition unit receives the simulating signal that produces from photoelectric sensor in the light channel structure and carries out the A/D conversion and handle (referring to Figure 10); The signal that said constant current control module sends according to micro controller unit is the monochromatic source constant current power supply (referring to Fig. 9, Figure 12) in the said light channel structure; Said display unit, input block are accomplished corresponding information and are shown and task input message by MCU controls; Said serial communication circuit is made up of U5, is 232 interfaces of standard with the communication level conversion of microcontroller U4, realizing the serial communication of micro controller unit and external device, or the connection printer; Said buzzer circuit is realized the control to hummer BZ by metal-oxide-semiconductor Q15 and Q20, accomplishes the task (referring to Figure 11) that time prompting was alarmed, was provided with to button feedback response and prompting and circuit by MCU controls; Said special clock circuit U 6 is formed with the external crystal-controlled oscillation device, accomplishes testDate, time real time record task (referring to Figure 13) by MCU controls; Said reflective crop nutrition diagnosis device is provided with built-in power 23, and perfect power management is arranged, and can realize charging, discharge, overcurrent, overvoltage protection; Said power control circuit provides 3 tunnel stabilized voltage supplys; U15 and peripheral devices are formed 3V voltage stabilizing output, and U12 and peripheral devices are formed 4.7V voltage stabilizing output, and the power management of lithium battery is provided; U11 and L2, D10 form power conversion, to the constant current light source cell power supply (referring to Figure 14) are provided.Its switching, charging of accomplishing built-in power and external power supply according to the instruction of micro controller unit detects, voltage stabilizing control.Can use dual power supply control, AC adapter external power supply and built-in lithium electricity power supply can be realized online charging.
The said apparatus volume is little, and is in light weight, is easy to carry, easy and simple to handle, and detection time is conventional to be shortened more than 1 hour and relatively be fit to field and grass-roots work use.Test strip combines reflectometer to come the content of detection material, has quantized the result who directly detects with test strips, can for each supervision department service be provided better.
Claims (9)
1. multi-wavelength multiple light courcess diffuse reflection type colorimetric device; Comprise light channel structure, photoelectric detective circuit, housing; It is characterized in that said light channel structure comprises base platform, middle cover and the top cover of being processed by light-proof material, an end of said middle cover and top cover is movably connected on the base platform; Said base platform is provided with detection window; Said detection window is by the monochromatic source of at least two different wave lengths of corresponding optical channel correspondence, and below said detection window, is provided with photoelectric sensor, in said, covers the bar shaped slit that offers corresponding said detection window; Be provided with the bar shaped boss that can be embedded in the said slit in the inboard of said top cover, be provided with to coupling replaceable reflecting plate on this boss bottom surface; Said photoelectric detective circuit comprises micro controller unit, data acquisition unit, constant current control module, display unit, input block; Passing to micro controller unit after said data acquisition unit receives the simulating signal that produces from photoelectric sensor in the light channel structure and carries out the A/D conversion handles; The signal that said constant current control module sends according to micro controller unit is the monochromatic source constant current power supply in the said light channel structure; Said display unit, input block are accomplished corresponding information and are shown and task input message by MCU controls.
2. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device, it is characterized in that the width of said bar shaped slit and the width of universal test paper are complementary; Said photoelectric sensor is any one among RGB230, opt101, spd34s, the TLS245.
3. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device, it is characterized in that the incident ray of said light source and replaceable reflecting plate are 45～60 ° of angles and are provided with.
4. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device, it is characterized in that, also comprise serial communication circuit in the said photoelectric detective circuit, to realize the serial communication of micro controller unit and external device.
5. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device; It is characterized in that; Also comprise buzzer circuit in the said photoelectric detective circuit, accomplish the task that time prompting was alarmed, was provided with to button feedback response and prompting and circuit by MCU controls.
6. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device, it is characterized in that, also comprise clock circuit in the said photoelectric detective circuit, accomplish testDate, time real time record task by MCU controls.
7. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device, it is characterized in that device is provided with built-in power.
8. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device; It is characterized in that; Also comprise power control circuit in the said photoelectric detective circuit, its switching, charging of accomplishing built-in power and external power supply according to the instruction of micro controller unit detects, voltage stabilizing control.
9. according to the said multi-wavelength multiple light courcess of claim 1 diffuse reflection type colorimetric device, it is characterized in that said micro controller unit is any one in MSP430F2XX series, 51 series monolithics, AVR single-chip microcomputer, the PIC single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200249410U CN202101930U (en) | 2011-01-26 | 2011-01-26 | Multi-wavelength and multi-light-source diffuse reflection type color comparison device |
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| CN2011200249410U CN202101930U (en) | 2011-01-26 | 2011-01-26 | Multi-wavelength and multi-light-source diffuse reflection type color comparison device |
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| CN202101930U true CN202101930U (en) | 2012-01-04 |
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| CN2011200249410U Expired - Lifetime CN202101930U (en) | 2011-01-26 | 2011-01-26 | Multi-wavelength and multi-light-source diffuse reflection type color comparison device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175627A (en) * | 2011-01-26 | 2011-09-07 | 河南农大迅捷测试技术有限公司 | Multi-wavelength multi-light-source diffuse reflection type colorimetric device and reflectivity measuring method |
| CN102788757A (en) * | 2012-08-28 | 2012-11-21 | 中国计量学院 | Water quality chromaticity detection device on basis of transmission-type optical fiber sensor |
-
2011
- 2011-01-26 CN CN2011200249410U patent/CN202101930U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175627A (en) * | 2011-01-26 | 2011-09-07 | 河南农大迅捷测试技术有限公司 | Multi-wavelength multi-light-source diffuse reflection type colorimetric device and reflectivity measuring method |
| CN102175627B (en) * | 2011-01-26 | 2013-05-01 | 河南农大迅捷测试技术有限公司 | Multi-wavelength multi-light-source diffuse reflection type colorimetric device and reflectivity measuring method |
| CN102788757A (en) * | 2012-08-28 | 2012-11-21 | 中国计量学院 | Water quality chromaticity detection device on basis of transmission-type optical fiber sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120104 Effective date of abandoning: 20130501 |
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| RGAV | Abandon patent right to avoid regrant |