CN1828683A - Wireless ultraviolet index real-time monitor - Google Patents
Wireless ultraviolet index real-time monitor Download PDFInfo
- Publication number
- CN1828683A CN1828683A CN 200610025624 CN200610025624A CN1828683A CN 1828683 A CN1828683 A CN 1828683A CN 200610025624 CN200610025624 CN 200610025624 CN 200610025624 A CN200610025624 A CN 200610025624A CN 1828683 A CN1828683 A CN 1828683A
- Authority
- CN
- China
- Prior art keywords
- ultraviolet index
- wireless
- ultraviolet
- data
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The disclosed comprises a UV index measurement part with a Schottky UV detector and a temperature sensor to measure the UV ray and temperature signal, a front-end amplifying circuit, an A/D circuit, a SCM control circuit, and a wireless emission module to real-time output the signal treated by former devices; and an opposite data receive part with a wireless receive module to receive the output signal, a SCM with double communication ports, a computer, and a display circuit. This invention can measure the index directly with small error and low cost.
Description
Technical field
The present invention relates to measuring technique, particularly relate to a kind of measuring technique of wireless ultraviolet index real-time monitor.
Background technology
Traditional uv measurement instrument uses optical filter to mate a series of problems that the erythema curve is brought, and is difficult to control as the coupling accuracy, uses multiple optical filter that volume is increased, and some spectrum is difficult to filter or the like problem, causes measurement accuracy to be difficult to guarantee.And it is also higher to the requirement of metering circuit.Need very long cable during traditional uv measurement instrument general measure, connect measuring head and display, the cost height take manpower, and is difficult to realize the Distributed Multi measurement.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical matters to be solved by this invention provides a kind of can directly measure, can wireless transmission, and error is little, and cost is low, and manpower is economized, and wireless ultraviolet index real-time monitor that can multimetering.
In order to solve the problems of the technologies described above, a kind of wireless ultraviolet index real-time monitor provided by the present invention is grouped into by ultraviolet index measure portion and ultraviolet index data reception portion, and wherein, the ultraviolet index measure portion comprises:
One Schottky ultraviolet detector is used to gather UV signal;
One temperature sensor is used to gather the ambient temperature signal;
Pre-amplification circuit connects the output terminal of ultraviolet detector and temperature sensor respectively, is used for the amplification of UV signal and temperature signal;
One analog to digital conversion circuit connects the UV signal of pre-amplification circuit and the output terminal of temperature signal respectively, is used for the analog to digital conversion of signal;
One single chip machine controlling circuit, the output terminal of connection analog to digital conversion circuit is used to finish data processing and temperature compensation;
One wireless transmitter module, the data output end of connection single chip machine controlling circuit is used to finish the wireless output of current measurement data;
Ultraviolet index Data Receiving part is used for reception, storage and the demonstration of measurement data;
By ultraviolet detector and temperature sensor measurement UV signal and temperature signal after the processing of the analog to digital conversion of the amplification of prime amplifier, A/D change-over circuit, MCU microprocessing unit, export in real time by wireless transmitter module, by behind the ultraviolet index Data Receiving part wireless receiving, carry out the storage and the demonstration of measurement data again.
Further, described ultraviolet index data reception portion branch comprises:
One wireless receiving module is used to finish the wireless input of current measurement data;
One has the single-chip microcomputer of duplex port, connects the data output end of wireless receiving module,
One computing machine, a PORT COM of connection single-chip microcomputer is used for record, the storage of ultraviolet index value;
One display circuit, a PORT COM of connection single-chip microcomputer is used for the demonstration of ultraviolet index and temperature.
Further, the software program flow process of described wireless ultraviolet index measuring instrument measure portion:
1) initialization;
2) temperature of Fang Daing and ultraviolet signal carry out the A/D conversion;
3) table look-up and carry out temperature compensation;
4) ultraviolet index computing and demarcation;
5) emission stable yields temperature and ultraviolet index data turn to 1).
Further, the software program flow process of described wireless ultraviolet index measuring instrument receiving unit:
1) initialization;
2) do you judge have no datat to send? do not have and then continue to judge; Have and then turn to 3);
3) receive data;
4) transmit data to computing machine or giant-screen through serial ports, turn to 1).
The beneficial effect of wireless ultraviolet index real-time monitor provided by the invention:
1) adopt the ultraviolet detector of the GaN that spectral response curve can match with the erythema effect curve of spectrum to measure ultraviolet index, having overcome general 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.
Experiment records gallium nitride material ultraviolet detection device spectral response curve as shown in Figure 1.Can find out among the figure that the whole spectral response curve and the erythema effect curve of spectrum are very identical.Very little to the ultraviolet response during greater than 350nm at wavelength, but the erythema curve weighting of this moment is also very little; In the response of 250～320nm wave band better, especially have comparatively level and smooth responsiveness between 280～320nm, the visible light rejection ratio is about 10
3, device ends fully in visible-range, and such curve shape is very near the erythema effect curve of spectrum, measurement to ultraviolet index provides very favorable condition, feasible measurement no longer needs optical filter, can directly measure, and can reduce error.
2) can realize the wireless transmission of ultraviolet index measurement data, need the requirement of very long cable when having saved general measure, save cost like this, save manpower, and can realize that Distributed Multi measures;
Utilize wireless ultraviolet index real-time monitor provided by the invention,, when measuring ultraviolet index, can save the requirement that increases optical filter, can directly measure easily owing to use the GaN ultraviolet Schottky detector that is complementary with the erythema curve.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.
Description of drawings
Fig. 1 is the spectral response curve figure of Schottky ultraviolet detection device;
Fig. 2 is the wireless ultraviolet index DATA REASONING part theory diagram of the embodiment of the invention;
Fig. 3 is the wireless ultraviolet index Data Receiving part theory diagram of the embodiment of the invention;
Fig. 4 is the wireless ultraviolet index monitor head construction sketch of the embodiment of the invention;
Fig. 5 is the UV signal collection and the amplifying circuit schematic diagram of the embodiment of the invention;
Fig. 6 is the temperature acquisition and the amplification module circuit theory diagrams of the embodiment of the invention;
Fig. 7 is the A/D change-over circuit schematic diagram of the embodiment of the invention;
Fig. 8 is the Single-chip Controlling and the data wireless radiating circuit schematic diagram of embodiment of the invention measure portion;
Fig. 9 is the measuring instrument radiating portion program flow diagram of the embodiment of the invention;
Figure 10 is the measuring instrument receiving unit program flow diagram of the embodiment of the invention;
Figure 11 is the Single-chip Controlling and the data receiver circuit schematic diagram of embodiment of the invention receiving unit.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
As shown in Figures 2 and 3, a kind of wireless ultraviolet index real-time monitor that the embodiment of the invention provided is grouped into by ultraviolet index measure portion and ultraviolet index data reception portion, and wherein, the ultraviolet index measure portion comprises:
One Schottky ultraviolet detector is used to gather UV signal;
One temperature sensor is used to gather the ambient temperature signal;
Pre-amplification circuit connects the output terminal of ultraviolet detector and temperature sensor respectively, is used for the amplification of UV signal and temperature signal;
One analog to digital conversion circuit connects the UV signal of pre-amplification circuit and the output terminal of temperature signal respectively, is used for the analog to digital conversion of signal;
One single chip machine controlling circuit, the output terminal of connection analog to digital conversion circuit is used to finish data processing and temperature compensation;
One wireless transmitter module, the data output end of connection single chip machine controlling circuit is used to finish the wireless output of current measurement data;
Ultraviolet index Data Receiving part is used for reception, storage and the demonstration of measurement data;
By ultraviolet detector and temperature sensor measurement UV signal and temperature signal after the processing of the analog to digital conversion of the amplification of prime amplifier, A/D change-over circuit, MCU microprocessing unit, export in real time by wireless transmitter module, by behind the ultraviolet index Data Receiving part wireless receiving, carry out the storage and the demonstration of measurement data again.
When wireless ultraviolet index real-time monitor is worked, hemispheric quartz glass cover 1 and teflon diffuse transmission plate 2 that sunshine sees through head (as Fig. 4) arrive the GaN ultraviolet detector of having calibrated 5, ultraviolet detector is because its visible light and infrared light rejection ratio are very high, so only receive the UV radiation of the sun, produce small photocurrent; The variation that temperature sensor is also measured ambient temperature simultaneously.UV signal and temperature signal produce two path signal respectively after prime amplifier amplifies, wherein spectral response curve and the erythema curve owing to the ultraviolet detection device is complementary, so the ultraviolet detector signal is exactly relative ultraviolet index data through the signal that produces behind the prime amplifier; At this moment temperature signal and ultraviolet detector signal carry out analog to digital conversion by multichannel A/D device, send into microcontroller 89C52 and carry out data processing, when the MCU processing unit compares these numerals and prior ultraviolet index data of having calibrated, and after searching corresponding temperature compensation data, just can obtain current ultraviolet index value and temperature value, then data be exported in real time by wireless transmitter module; Data are behind spatial transmission, receive by wireless receiving module, then data are sent among the single-chip microcomputer DS87C520 with duplex port, data send to 128 * 48 dot matrix LED display and computing machines respectively by two PORT COM, wherein display screen can carry out the demonstration of ultraviolet index and temperature as optional accessory, and can also roll display 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 data that send to computer terminal can and be input in the database by the computer application software record.
Wireless ultraviolet index real-time monitor is made up of measure portion and receiving unit.
As shown in Figure 4, the structure of the ultraviolet index DATA REASONING head of ultraviolet index measuring instrument is made up of the ultraviolet detector 5 and the monitor head measure portion circuit of stainless steel casing 3, quartz glass cover 1, teflon diffuse transmission plate 2 and erythema Curve Matching.Stainless steel casing 3 have discharge water, moistureproof, anti-function of embroidering, the inwall blacking 4 of monitor head, quartz glass cover 1 guarantees ultravioletly fully to see through, and the protection detector; Teflon diffuse transmission plate 2 can guarantee to measure has the good cosine characteristic;
The function of monitor head measure portion circuit realizes wireless ultraviolet index DATA REASONING and emission exactly.It is made up of detector, temperature sensor, pre-amplification circuit, A/D change-over circuit, single chip machine controlling circuit and radio transmitter.
As shown in Figure 5, in the ultraviolet index signal amplification circuit, 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.
Because the spectral response characteristic of Schottky Ultraviolet sensor is not only relevant with the ultraviolet light wavelength of incident, but also confidential relation is arranged with environment temperature.And as the senser element of ultraviolet index monitor, 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 ultraviolet index monitor, 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).Temperature acquisition and amplification module circuit theory are seen Fig. 6.
The A/D change-over circuit as shown in Figure 7, the A/D device is selected 24 analog to digital converter AD7714 of AD company for use.It is a complete AFE (analog front end) that is very suitable for the low frequency signal high-acruracy survey, can directly measure the direct current feeble signal.Its use and-poor (∑-Δ) switch technology is with the no error performance of realization up to 24.This device has 3 difference analogue inputs and the input of difference benchmark, can realize signal condition and conversion to the system that reaches 5 passages, and output serial digital amount.AD7714 can be by 3 line SPI serial line interfaces gain setting, signal polarity and channel selecting, and has self calibration, system calibration and background calibration function, and the user also can read and write register in the sheet simultaneously.Fig. 7 is the analog to digital conversion circuit that AD7714 and 89C52 form.Here only use two passages, and a voltage signal, the voltage signal that current conversion is.The SPI interface uses 5 port: CS, SCLK, DIN, DOUT and DRDY.CS is as chip selection signal, and SCLK, DIN, DOUT and DRDY connect the P1 mouth, with the communication of doing 89C52.The sequential of the device that provides according to AD company during program design is carried out, and SCLK provides clock signal, and DIN is as serial data input use, and DOUT is as serial data output use.When the AD EOC, can monitor the state of DRDY, adopt the way of inquiry to determine the AD transformation result here.
Single-chip Controlling and data wireless radiating circuit are as shown in Figure 8.After digital signal after the A/D conversion enters single-chip microcomputer, through data correction, and with demarcate good data relatively after, output in the radio transmitter by serial ports.Wireless transmit adopts nRF401 wireless transmission/receiving chip to realize wireless transmission ultraviolet index data.NRF401 is an industrial frequency range of special use (433MHz) radio transmitting and receiving chip.It adopts FSK (frequency shift keying) modulation-demodulation technique.Maximum transmission rate can reach 20kHz, satisfies the static data measurement requirement.Data are sent into nRF401 by the TXD and the RXD of serial ports, and three ports of P2 mouth are as the control end to nRF401, and final data is sent through single-ended antenna emission by this chip.
The ultraviolet index measuring instrument receives the electrical box that head part is band receiving antenna and RS232 interface.Contain the Data Receiving partial circuit.As shown in figure 11, the receiving unit circuit is made up of high-speed microprocessor DS87C520, nRF401 and level shifting circuit with duplex port, after at first signal receives through nRF401, by this chip of Single-chip Controlling, data are input in the single-chip microcomputer internal RAM by a serial ports, defeated as in computing machine by another serial ports again through RS232.Circuit diagram as shown in figure 11.This communication port also can be connected with the big screen LED display screen simultaneously, shows current ultraviolet index and temperature data.Adopt the way video data of divorced from computer when giant-screen uses, guarantee the normal use of port.
As shown in Figure 9, according to the hardware line, and the ultraviolet index monitor function that will realize, the software program flow process of wireless ultraviolet index measuring instrument measure portion:
1) initialization;
2) temperature of Fang Daing and ultraviolet signal carry out the A/D conversion;
3) table look-up and carry out temperature compensation;
4) ultraviolet index computing and demarcation;
5) emission stable yields temperature and ultraviolet index data turn to 1).
As shown in figure 10, the software program flow process of wireless ultraviolet index measuring instrument receiving unit:
1) initialization;
2) do you judge have no datat to send? do not have and then continue to judge; Have and then turn to 3);
3) receive data;
4) transmit data to computing machine or giant-screen through serial ports, turn to 1).
In the subroutine, comprise the configuration subroutine of data transmission subroutine, Data Receiving subroutine, AD conversion chip control port, send subroutine, ultraviolet index patch routine of data communication subroutine, AD conversion portion etc. by string.
Claims (4)
1, a kind of wireless ultraviolet index real-time monitor is grouped into by ultraviolet index measure portion and ultraviolet index data reception portion, it is characterized in that the ultraviolet index measure portion comprises:
One Schottky ultraviolet detector is used to gather UV signal;
One temperature sensor is used to gather the ambient temperature signal;
Pre-amplification circuit connects the output terminal of ultraviolet detector and temperature sensor respectively, is used for the amplification of UV signal and temperature signal;
One analog to digital conversion circuit connects the UV signal of pre-amplification circuit and the output terminal of temperature signal respectively, is used for the analog to digital conversion of signal;
One single chip machine controlling circuit, the output terminal of connection analog to digital conversion circuit is used to finish data processing and temperature compensation;
One wireless transmitter module, the data output end of connection single chip machine controlling circuit is used to finish the wireless output of current measurement data;
Ultraviolet index Data Receiving part is used for reception, storage and the demonstration of measurement data;
By ultraviolet detector and temperature sensor measurement UV signal and temperature signal after the processing of the analog to digital conversion of the amplification of prime amplifier, A/D change-over circuit, MCU microprocessing unit, export in real time by wireless transmitter module, by behind the ultraviolet index Data Receiving part wireless receiving, carry out the storage and the demonstration of measurement data again.
2, wireless ultraviolet index real-time monitor according to claim 1 is characterized in that, described ultraviolet index data reception portion branch comprises:
One wireless receiving module is used to finish the wireless input of current measurement data;
One has the single-chip microcomputer of duplex port, connects the data output end of wireless receiving module,
One computing machine, a PORT COM of connection single-chip microcomputer is used for record, the storage of ultraviolet index value;
One display circuit, a PORT COM of connection single-chip microcomputer is used for the demonstration of ultraviolet index and temperature.
3, wireless ultraviolet index real-time monitor according to claim 1 is characterized in that, the software program flow process of described wireless ultraviolet index measuring instrument measure portion:
1) initialization;
2) temperature of Fang Daing and ultraviolet signal carry out the A/D conversion;
3) table look-up and carry out temperature compensation;
4) ultraviolet index computing and demarcation;
5) emission stable yields temperature and ultraviolet index data turn to 1).
4, wireless ultraviolet index real-time monitor according to claim 1 is characterized in that, the software program flow process of described wireless ultraviolet index measuring instrument receiving unit:
1) initialization;
2) do you judge have no datat to send? do not have and then continue to judge; Have and then turn to 3);
3) receive data;
4) transmit data to computing machine or giant-screen through serial ports, turn to 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610025624 CN1828683A (en) | 2006-04-12 | 2006-04-12 | Wireless ultraviolet index real-time monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610025624 CN1828683A (en) | 2006-04-12 | 2006-04-12 | Wireless ultraviolet index real-time monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1828683A true CN1828683A (en) | 2006-09-06 |
Family
ID=36947051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610025624 Pending CN1828683A (en) | 2006-04-12 | 2006-04-12 | Wireless ultraviolet index real-time monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1828683A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745585A (en) * | 2014-01-03 | 2014-04-23 | 北京工业大学 | Self-driven nano ultraviolet detection system employing smart responder wireless transmission |
| CN105253949A (en) * | 2015-10-10 | 2016-01-20 | 无锡市江大联盛水处理科技有限公司 | Water source ultraviolet sterilizer control system and control method thereof |
-
2006
- 2006-04-12 CN CN 200610025624 patent/CN1828683A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745585A (en) * | 2014-01-03 | 2014-04-23 | 北京工业大学 | Self-driven nano ultraviolet detection system employing smart responder wireless transmission |
| CN105253949A (en) * | 2015-10-10 | 2016-01-20 | 无锡市江大联盛水处理科技有限公司 | Water source ultraviolet sterilizer control system and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105680941B (en) | A kind of underwater LED long haul communications systems based on visible ray | |
| CN101278838B (en) | Multichannel respiratory physiological signal wireless monitoring system and method | |
| CN202693474U (en) | Turbidity sensor for water quality on producing line detection | |
| CN107389613A (en) | LED light-pulse generator formula index number of canopy vegetation of crops measurement systems | |
| CN102768186B (en) | Nondestructive rapid detection device and detection method for field crop growth information | |
| CN106932783A (en) | A kind of wide range high-speed, high precision LDMS | |
| CN204694347U (en) | A kind of photoelectric detection circuit with low noise | |
| CN106872028B (en) | A kind of crop physical and chemical parameter measuring apparatus and measurement method | |
| CN1828683A (en) | Wireless ultraviolet index real-time monitor | |
| CN101793680B (en) | Crop vegetation index measurement system | |
| CN106618599A (en) | Wearable functional near-infrared spectral imaging system front end | |
| CN207066986U (en) | LED light-pulse generator formula index number of canopy vegetation of crops measurement systems | |
| CN100365940C (en) | Tourist communication device and its communication method | |
| CN110113110A (en) | Underwater visible light communication device | |
| CN107290053A (en) | Miniature long wave near-infrared Internet of things node based on linear variable filter | |
| CN2884366Y (en) | Radio type ultraviolet ray index measuring device | |
| CN102778434A (en) | Turbidity transducer for online detection of water quality and detection method thereof | |
| CN207475555U (en) | A kind of ultra wide band multichannel optoelectronic integration detector for microwave photon system | |
| CN203732158U (en) | CCD-based spectral signal acquisition circuit | |
| CN109669073A (en) | A kind of adaptive soil conductivity detection device | |
| CN213637760U (en) | Dual-mode underwater wireless optical receiver | |
| CN103900974A (en) | Method and instrument for measuring normalized vegetation difference index | |
| CN205120534U (en) | Dust detection device | |
| CN204206117U (en) | A kind of amplifier of creatures' physical electric signals circuit of fast detector | |
| CN210893416U (en) | Wearable environment monitoring equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |