CN200975920Y - Ultraviolet ray index real time measurement apparatus - Google Patents
Ultraviolet ray index real time measurement apparatus Download PDFInfo
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- CN200975920Y CN200975920Y CN 200620040415 CN200620040415U CN200975920Y CN 200975920 Y CN200975920 Y CN 200975920Y CN 200620040415 CN200620040415 CN 200620040415 CN 200620040415 U CN200620040415 U CN 200620040415U CN 200975920 Y CN200975920 Y CN 200975920Y
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Abstract
The utility model relates to a real-time measuring apparatus for ultraviolet index, which is composed of a head part for the receiving and amplifying of the ultraviolet signals and temperature signals; wherein, a Schottky ultraviolet detector which can respond with the erythema response curve is connected with an input of a pre-amplifier circuit; a temperature sensor is connected with an input of the signal amplifier circuit; meanwhile, the utility model also comprises an analog to digital conversion circuit and a digital to analog conversion circuit, which are connected with the pre-amplifier circuit of the head part and the output of the signal amplifier circuit respectively; and Single Chip Processor control circuit for data processing and temperature compensation is connected with the output of the analog to digital conversion circuit; a display circuit for displaying the measuring results shows the ultraviolet index that have been measured in a color and columnar form; a software program compares the data after processing with the ultraviolet index data which has marked before, and checks the corresponding temperature compensation data, then the final real-time ultraviolet index and temperature value can be acquired and transported to a LED dot matrix screen and color columnar to display.
Description
Technical field
The utility model relates to measuring technique, particularly relates to the real-time measuring technique that a kind of ultraviolet test value is a ultraviolet index.
Background technology
At present traditional uv measurement instrument uses optical filter to mate a series of problems that the erythema curve is brought, as mate accuracy be difficult to control, use multiple optical filter that volume is increased, some spectrum is difficult to filter or the like problem, causes measurement accuracy to be difficult to guarantee; And reduced requirement to metering circuit.
The utility model content
At the defective that exists in the above-mentioned prior art, it is little that technical problem to be solved in the utility model provides a kind of volume, reliability height, measuring accuracy height, convenient, can monitor in real time and forecast and the ultraviolet index real-time measurement apparatus that saved optical filter of measurement.
In order to solve the problems of the technologies described above, a kind of ultraviolet index real-time measurement apparatus provided by the utility model is characterized in that, comprising:
One hardware circuit part is made up of head and main frame two parts, wherein,
One head part is used for the reception and the amplification of UV signal and temperature signal; Comprising:
One can be connected the input end of pre-amplification circuit with the Schottky ultraviolet detector of erythema response curve coupling;
One temperature sensor connects the input end of signal amplification circuit;
Hardware circuit part also comprises:
One host machine part, comprising:
One analog to digital conversion circuit is used for the analog to digital conversion of signal, connects the pre-amplification circuit of head and the output terminal of signal amplification circuit respectively;
One single chip machine controlling circuit is used to finish data processing and temperature compensation, connects the output terminal of analog to digital conversion circuit;
One display circuit is used for the demonstration of measurement result, and shows the ultraviolet index of measuring with the form of colored column, and its definitions of color meets the relevant regulations of The World Health Organization (WHO);
During measurement, earlier data after handling and prior ultraviolet index data of having calibrated are compared, and after searching corresponding temperature compensation data, can obtain final real-time ultraviolet index value and temperature value, deliver to LED dot matrix screen then and the column color lamp carries out the demonstration of ultraviolet index and temperature.
Further, described head is a can, and box top ultraviolet ray inlet is provided with hemispheric quartz glass cover and teflon diffuse transmission plate, is provided with the Schottky ultraviolet detector in the box, the inwall blacking of box shell.
Further, the second amplifying circuit formed by precision operational-amplifier of described pre-amplification circuit.
The ultraviolet index real-time measurement apparatus that utilizes the utility model to provide owing to use the GaN ultraviolet Schottky detector that is complementary with the erythema curve, when measuring ultraviolet index, can save the requirement that increases optical filter, can directly measure easily.Making is one of direction of following ultraviolet index measurement in this way, and it is reducing the volume of instrument, increases instrument reliability, improves the aspects of measuring such as precision and has all manifested very outstanding advantage.Simultaneously, be convenient to promote in ultraviolet meteorological research field.The instrument light and flexible can be used in multiple occasion, is particularly suitable for using in meteorological department, and can shows forecast in public.
Description of drawings
Fig. 1 is the utility model embodiment ultraviolet index real-time measurement apparatus theory diagram;
Fig. 2 is the head construction sketch of the utility model embodiment ultraviolet index real-time measurement apparatus;
Fig. 3 is the UV signal collection and the amplifying circuit schematic diagram of the utility model embodiment head;
Fig. 4 is the temperature acquisition and the amplification module circuit theory diagrams of the utility model embodiment head;
Fig. 5 is the host machine part circuit theory diagrams of the utility model embodiment ultraviolet index real-time measurement apparatus;
Fig. 6 is the program flow chart of the utility model embodiment ultraviolet index real-time measurement apparatus;
Fig. 7 is the interior measured Fluorescent Magnetic Flaw Detector of solar spectrum and the curve map of erythema effect;
Fig. 8 is the curve map that is subjected to the total Fluorescent Magnetic Flaw Detector after the erythema spectrally-weighted;
Fig. 9 is the spectral response curve figure of Schottky ultraviolet detection device.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
Referring to shown in Figure 1, a kind of ultraviolet index real-time measurement apparatus that the utility model embodiment is provided comprises:
One hardware circuit part is made up of head and main frame two parts, wherein,
One head part is used for the reception and the amplification of UV signal and temperature signal; Comprising:
One can be connected the input end of pre-amplification circuit (OPA111) with the Schottky ultraviolet detector of erythema response curve coupling;
One temperature sensor (AD590) connects the input end of signal amplification circuit (LF353);
Hardware circuit part also comprises:
One host machine part is used for conversion, compensation, processing, the demonstration of signal; Comprising:
One analog to digital conversion circuit (8 A/D conversion chip MAX154) is used for the analog to digital conversion of signal, connects the pre-amplification circuit of head and the output terminal of signal amplification circuit respectively;
One single chip machine controlling circuit (high-speed microprocessor DS87C520) is used to finish data processing and temperature compensation, connects the output terminal of analog to digital conversion circuit;
One display circuit (128 * 48 dot matrix LED display and column color lamp display) is used for the demonstration of measurement result, and shows the ultraviolet index of measuring with the form of colored column, and its definitions of color meets the relevant regulations of The World Health Organization (WHO).
The software program of single-chip microcomputer compares data after handling and prior ultraviolet index data of having calibrated, and after searching corresponding temperature compensation data, can obtain final real-time ultraviolet index value and temperature value, deliver to 128 * 48 matrix LED dot matrix screens and column color lamp then and carry out the demonstration of ultraviolet index and temperature;
Referring to shown in Figure 2, the head of ultraviolet index real-time measurement apparatus is a can, and box top ultraviolet ray inlet is provided with hemispheric quartz glass cover 1 and teflon diffuse transmission plate 2, is provided with Schottky ultraviolet detector 3 in the box, the inwall blacking of shell 4.
Referring to shown in Figure 1, the principle of work of ultraviolet index real-time measurement apparatus: when the ultraviolet index real-time measurement apparatus is worked, sunshine sees through the hemispheric quartz glass cover 1 of head (as shown in Figure 2) and teflon diffuse transmission plate 2 (can reference: Zhong Jiangfan, Zhang Tieqiang, the clock sky etc. material ultraviolet band diffuse reflection Study of test method. photoelectron. laser, Vol.2, No.2,1991:127-128) arrive Schottky ultraviolet detector 3, the inwall blacking of shell 4, the Schottky ultraviolet detector so only receive the UV radiation of the sun, produces small photocurrent because its visible light and infrared light rejection ratio are very high; Simultaneously, temperature sensor AD 590 reflects the variation of ambient temperature by the current changing rate of 1 μ A/K.UV signal and temperature signal are after amplifier amplifies, carry out analog to digital conversion by MAX154, send into single-chip microcomputer DS87C520, because the spectral response curve and the erythema curve of Schottky ultraviolet detection device are complementary (so the signal that produces the resulting result of (1) formula in the calculating of ultraviolet index) just, so just save needs and increased the trouble that optical filter mates, when single-chip microcomputer compares these numerals and prior ultraviolet index data of having calibrated, and after searching corresponding temperature compensation data, just can obtain final real-time ultraviolet index value and temperature value, deliver to 128 * 48 matrix LED dot matrix screens and column color lamp then and carry out the demonstration of ultraviolet index and temperature, simultaneously, can also roll display below LED dot matrix screen under this ultraviolet index grade, the public corresponding the sun-proof measure that should take, as put suncream on the skin, wear caftan, wear sunglasses, beat parasols etc., cause the skin sunburn to prevent excessive ultraviolet radiation.
The collection of ultraviolet index real-time measurement apparatus head UV signal and amplifying circuit are as shown in Figure 3.Among Fig. 3, S1 is a Schottky ultraviolet detection device, and IC1 is the monolithic precision operational-amplifier OPA111 of low bias current, and V+, V-are from the low noise mu balanced circuit, and R13 is a high resistant, and its impedance is 1.2 * 10
11Ω, the voltage signal that IC3 comes prime carry out secondary and amplify, and regulate the enlargement factor that multi-turn precision resistor RV1 can change second level amplifying circuit, so that the output voltage amplitude of whole amplifying circuit is fit to the needs of modulus conversion chip MAX154.For reducing various interference, in amplifying circuit, taked several different measures such as shielding to improve the precision of amplifying circuit.
Temperature acquisition and amplifying circuit principle are referring to shown in Figure 4, because the spectral response characteristic of Schottky Ultraviolet sensor is not only relevant with the ultraviolet light wavelength of incident, but also with environment temperature confidential relation are arranged.And as the senser element of ultraviolet index real-time measurement apparatus, it is outdoor that the Schottky Ultraviolet sensor is placed in, environment temperature can be between-40 ℃～+ 50 ℃ large-scope change, bigger to the measurement result influence.Therefore, in the ultraviolet index real-time measurement apparatus, add temperature compensation module, real-time monitoring environment variation of temperature, and measurement result carried out suitable correction, to guaranteeing the accuracy of measurement result, be very necessary.Through the AD590 chip that laser trimming was calibrated, its detection sensitivity is 1 μ A/K, and output current value (μ A) can directly characterize thermodynamic temperature (K).
The circuit theory of each module of ultraviolet index real-time measurement apparatus host machine part as shown in Figure 5, signal from ultraviolet index real-time measurement apparatus head passes through the multicore shielding line after amplifying circuit amplifies, enter the analog input channel of modulus conversion chip MAX154, passage AIN2 is a UV signal, and passage AIN4 is a temperature signal.For avoiding interference, with all the other two analog input channel ground connection of modulus conversion chip MAX154.Analog channel address selection input pin A0 ground connection, A1 connects the P1.5 mouth of single-chip microcomputer, can select UV signal or temperature signal to carry out analog to digital conversion by P1.5 set or clear " 0 " to single-chip microcomputer, the data-out bus of MAX154 connects the P2 mouth of DS87C520, data after conversion finishes can be read by the P2 mouth, the P1.7 that the EOC signal output INT pin of MAX154 connects single-chip microcomputer can judge by the level state of inquiry P1.7 pin whether conversion finishes.
Handle through high-speed microprocessor DS87C520 through data after A, obtain corresponding ultraviolet index and temperature, and after according to environment temperature ultraviolet index being revised accordingly, obtain correct ultraviolet index value, send the column color lamp to show ultraviolet index by serial communication port 0, after the MAX232 level conversion, send into 128 * 48 matrix LED big screen display screens by serial communication port 1 and carry out the demonstration of ultraviolet index, temperature.Simultaneously, in last column of dot matrix screen, roll display is the necessary protection measure that the skin public institute that avoids tanning severely should take under this ultraviolet index grade, and this literal shows and can finish after the download in advance by downloading.
As shown in Figure 6, the program circuit of a kind of ultraviolet index real-time measurement apparatus of being provided of the utility model embodiment:
1) initialization;
2) carry out the A/D conversion, obtain temperature and ultraviolet total intensity;
3) calculate current temperature value;
4) table look-up and obtain temperature compensation coefficient;
5) calculate ultraviolet index;
6) displays temperature, ultraviolet index and relevant information.
In the subroutine, comprise configuring ports and AD conversion chip control port when serial ports 0 control column color lamp shows ultraviolet index the configuration subroutine, send subroutine, the serial ports 0 control column color lamp of data communication subroutine, AD conversion portion to show that subroutine, the column color lamp display subroutine of ultraviolet index, the literal of ultraviolet index download etc. by serial ports 0 to the column color lamp.
The ultraviolet index brief introduction
1) definition of ultraviolet index
Ultraviolet index is the degree that the solar ultraviolet radiation of tolerance arrival earth surface influences human skin.Ultraviolet ray is made according to " the erythema effect curve of spectrum " the infringement of human skin.The erythema effect curve of spectrum as shown in Figure 7.The erythema effect curve of spectrum is to cause a large amount of statistical study and the result of study of the MID of human skin erythematous response to be made according to the UV radiation to different wave length.This curve has been comprised the World Health Organization (WHO), and (World Health Organization, WHO) etc. many international organizations adopt, as an important evidence calculating ultraviolet index.
Stipulate according to the World Health Organization (WHO), vary in size by ultraviolet index, the sun can be tanned by the sun type and be divided into basic, normal, high, very high, high five classes, each sun is tanned by the sun the identification directly perceived of classification for the ease of the public, represent five kinds of different exposure in sunshine classifications with green, yellow, orange, red, purple respectively, ultraviolet index is represented ultraviolet intensity, and the high more expression uitraviolet intensity of index is strong more, and the chance that skin is damaged is high more.On the abundant date of sunlight in summer, ultraviolet index can rise usually and surpass 10.In the time of cloudy and rainy, ultraviolet index just can lower.Tan by the sun classification for the different sun, we should take corresponding sun-proof measure, to prevent or to alleviate possible uv damage.
2) calculating of ultraviolet index
The standard method of the calculating ultraviolet index that the World Meteorological Organization (WMO) and the World Health Organization (WHO) advise is:
I. measure the solar ultraviolet radiation intensity E (λ) of 280nm～400nm different wave length, shown in curve among Fig. 71;
II. the solar ultraviolet irradiance with different wave length multiply by erythema effect curve of spectrum S (λ) (shown in the curve in Fig. 7 2)
Interior corresponding weighting numerical value is to reflect that human skin is to ultraviolet reaction;
III. the solar ultraviolet radiation intensity E (λ) of different wave length and erythema effect curve of spectrum S (λ) are multiplied each other, then wavelength 280nm～400nm is carried out integration, draw the total ultraviolet radiation intensity that is subjected to after the weighting of the erythema effect curve of spectrum
Unit is mW/m
2The following area of curve among Fig. 8 just;
Total ultraviolet radiation intensity after the erythema spectrally-weighted be multiply by 0.04, obtain ultraviolet index.Promptly
Formula (2) is exactly the computing formula of ultraviolet index.
The GaN ultraviolet Schottky detector that is complementary with the erythema curve
Record gallium nitride material Schottky ultraviolet detection device spectral response curve by experiment as shown in Figure 9.The whole as seen from Figure 9 spectral response curve and the erythema effect curve of spectrum are very identical.
Claims (3)
1, a kind of ultraviolet index monitoring device is characterized in that, comprising:
One hardware circuit part is made up of head and main frame two parts, wherein,
One head part is used for the reception and the amplification of UV signal and temperature signal; Comprising:
One Schottky ultraviolet detector connects the input end of pre-amplification circuit;
One temperature sensor connects the input end of signal amplification circuit;
Hardware circuit part also comprises:
One host machine part, comprising:
One analog to digital conversion circuit is used for the analog to digital conversion of signal, connects the pre-amplification circuit of head and the output terminal of signal amplification circuit respectively;
One single chip machine controlling circuit is used to finish data processing and temperature compensation, connects the output terminal of analog to digital conversion circuit;
One display circuit is used for the demonstration of measurement result and ultraviolet index.
2, ultraviolet index monitoring device according to claim 1, it is characterized in that, the head of described ultraviolet index monitoring device is a can, box top ultraviolet ray inlet is provided with hemispheric quartz glass cover and teflon diffuse transmission plate, be provided with the Schottky ultraviolet detector in the box, the inwall blacking of box shell.
3, ultraviolet index monitoring device according to claim 1 is characterized in that, the second amplifying circuit that described pre-amplification circuit is made up of precision operational-amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620040415 CN200975920Y (en) | 2006-03-23 | 2006-03-23 | Ultraviolet ray index real time measurement apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620040415 CN200975920Y (en) | 2006-03-23 | 2006-03-23 | Ultraviolet ray index real time measurement apparatus |
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| CN200975920Y true CN200975920Y (en) | 2007-11-14 |
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| CN 200620040415 Expired - Fee Related CN200975920Y (en) | 2006-03-23 | 2006-03-23 | Ultraviolet ray index real time measurement apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841808A (en) * | 2016-04-28 | 2016-08-10 | 京东方科技集团股份有限公司 | Ultraviolet ray monitoring device, monitoring method and system |
| CN107356329A (en) * | 2017-07-17 | 2017-11-17 | 南京信息职业技术学院 | A kind of ultraviolet detector |
-
2006
- 2006-03-23 CN CN 200620040415 patent/CN200975920Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841808A (en) * | 2016-04-28 | 2016-08-10 | 京东方科技集团股份有限公司 | Ultraviolet ray monitoring device, monitoring method and system |
| CN105841808B (en) * | 2016-04-28 | 2017-12-08 | 京东方科技集团股份有限公司 | Ultraviolet monitor function equipment, monitoring method and system |
| US10024714B1 (en) | 2016-04-28 | 2018-07-17 | Boe Technology Group Co., Ltd. | Ultraviolet radiation monitoring apparatus, system having the same, and method thereof |
| US10209126B2 (en) | 2016-04-28 | 2019-02-19 | Boe Technology Group Co., Ltd. | Ultraviolet radiation monitoring apparatus, system having the same, and method thereof |
| CN107356329A (en) * | 2017-07-17 | 2017-11-17 | 南京信息职业技术学院 | A kind of ultraviolet detector |
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