CN203249689U - Illumination detection device based on single band photon flux density model - Google Patents

Abstract

Provided is an illumination detection device based on a single band photon flux density model. The device comprises a sensor module, a user interaction module, a control module, a GPS module, a SD card module, and a power module. First, during a certain period of time in a calendar year, the sensor module continuously measures visible light total light intensity at a same time every day. A time module and the GPS module detect time and geographic positions so as to determine real-time solar zenith angles, and based on a selected specific wave band range, real-time ratio of the wave band to visible light is obtained by using a specific wave band percentage fitting model under different solar zenith angles, and then specific single band photon flux density is calculated according to a formula. According to system time and latitude, the system calculates the solar zenith angles, and combining real-time illumination intensity of environment, PFD data of the specific wave bands is accurately acquired. The device can detect specific wave band PFDs according to spectral absorption characteristics of different crops, and detection information is more accurate, experimental data is more reliable, and the device has good expansibility.

Description

Illumination checkout equipment based on single band light quantum flux density model

Technical field

The utility model belongs to intensity of illumination detection technique field, particularly a kind of illumination checkout equipment based on single band light quantum flux density model.

Background technology

Photosynthesis is green plants with the process of light energy conversion for self chemical energy, and in photosynthesis research, the illumination Detection ﹠ Controling remain a relatively weak link.The research and development of the illumination checkout equipment of present stage concentrate on mainly that (unit is W/m based on photometry system (unit is lx) and energetics system ²) the illumination checkout equipment, the illuminance unit that the photometry system adopts can not reflect well that the relation between illumination and the photosynthetic rate is abandoned gradually; The energetics system makes troubles for photosynthetic research because it can not reflect the quantitative relation between PAR energy and the biological yield; In addition, in the visible light except the spectrum of 400-700nm wave band the spectrum of other specific band the growth of plant is also had irreplaceable effect.

In recent years, modern biotechnology particularly photosynthesis research on mechanism provides the quantitative theory basis for accurate illumination detection system, quantum is learned the proposition of system, photosynthetic research has been brought into a new field, studies show that the effective radiant light quantum of plant photosynthesis flux density (PFD) and participate in having clear and definite quantitative relationship between the photochemically reactive material, therefore, how to realize the detection of plant subrane light quantum flux density has been become a urgent problem on existing optical sensor basis.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of illumination checkout equipment based on single band light quantum flux density model, adopt existing visible light optical sensor, by realize visible light light intensity and the conversion of plant subrane light quantum flux density obtaining the PFD data based on the single band light quantum flux density algorithm of sun altitude.System is adopting on the basis that has the visible light optical sensor now by the detection of software mode realization to specific band light quantum flux density, on the basis of existing optical sensor, reduce cost of development, improved accuracy, the Universal and scalability of system.

To achieve these goals, the technical solution adopted in the utility model is:

A kind of illumination checkout equipment based on single band light quantum flux density model comprises:

Sensor assembly is used for certain period within a calendar year, the total light intensity of visible light under the continuous coverage same time of every day;

User interactive module is used for arranging system data and detects wave band, and by the real-time information of liquid crystal display display environment;

Control module connects described sensor assembly and user interactive module, receives the total light intensity of visible light that described sensor assembly measures;

The GPS module for the latitude information that obtains the location real-time and precise, realizes that sun altitude calculates obtaining of correlation factor;

The SD card module carries out real-time storage to the information of optical sensor collection, and realizes the wireless transmission of data by the GPRS module take SIM900 as core;

Power module is used for whole system is powered.

Described sensor assembly is the visible light optical sensor.

Described control module is utilized formula take the STC12C5A60S2 single-chip microcomputer as core processor according to system time and geography information Calculate sun altitude, utilize sun altitude that the Matlab match obtains and the ratio of specific band institute visible light to calculate real-time light intensity number percent bandper, according to formula

Realization is to the detection of specific band photon flux density under the different sun altitudes, and wherein, H is sun altitude,,

Be latitude; δ is declination; ω is the real-time hour angle of the sun, and δ=23.5 ° sin0.986d, d be for detecting day and day interval number of days in Spring Equinox then, ω=(hour-12+min/60) * 15 °; Hour represents hour value of Measuring Time, and min represents minute value of Measuring Time, and 24 hours Beijing time system is taked in the Measuring Time metering, and VL is the total light intensity of visible light, and h is Planck constant, and c is the vacuum velocity of wave; λ is for measuring the mean wavelength of wave band, and n is Avogadro's number.

The utility model calculates sun altitude according to system time and latitude, and combining environmental real-time lighting intensity realizes that specific band PFD data accurately gather, and compared with prior art have following characteristics:

(1) applied range, native system adopt software mode realize all band natural light light intensity and the conversion of standing wave section PFD, can according to the absorption characteristic of Different Crop to spectrum, detect specific band PFD;

(2) detection information is more accurate, and system adopts quantum to learn system as measurement unit, and has clear and definite quantitative relationship between the material of participation photosynthetic response, and introduces sun altitude to the impact of natural light spectrum, and experimental data is more reliable;

(3) extendability is strong, and native system adds SD card and SIM900 module, realizes storage and the wireless transmission of real time data, and system can be applicable to the fields such as the detection of photosynthesis environmental information and supplementing light for greenhouse.

Description of drawings

Fig. 1 is the utility model systematic schematic diagram.

Fig. 2 is the utility model system works general flow chart.

Fig. 3 is the matched curve that ruddiness accounts for visible light ratio and sun altitude corresponding relation among the utility model embodiment.

Embodiment

Describe embodiment of the present utility model in detail below in conjunction with drawings and Examples.

As shown in Figure 1, be the utility model systematic schematic diagram, comprise the user interactive module that power module, sensor assembly, the control module take the STC12C5A60S2 single-chip microcomputer as core processor, SIM900 module, SD card module and button and liquid crystal form.

Wherein, the external general 12V adapter of power module is system power supply, and system divides 5V, 3.3V and 4.2V three tunnel power supplies.Input voltage is depressurized to respectively 5V and 4.2V through two-way lowering and stabilizing blood pressure module, wherein the 4.2V power supply directly is the SIM900 module for power supply, 5V power supply one tunnel directly is single-chip microcomputer and the power supply of SD card module, another road obtains the 3.3V operating voltage through the LM1117 power module, is key-press module, sensor assembly and Liquid Crystal Module power supply.

Sensor assembly directly transfers data to single-chip microcomputer for detection of the real-time visible light illuminance of environment, realizes the data acquisition of illuminance.Though plant is substantially identical to the absorption of spectrum, but still there are differences, the spectrum of some specific band is significant to the specified plant growth in the natural light simultaneously, for accuracy and the extensibility that improves system, to realize detecting for the luminous environment of different plants, native system adopts visible light numeral optical sensor, gather luminous environment visible light illuminance and with digital data transmission to single-chip microcomputer, save the A/D modular converter, simplify circuit system, detection signal passes through I ²C bus mode access uses that time-sharing multiplex mechanism has reduced effectively that bus takes up room, circuit board space and pin use number, P1.6 and the P1.7 mouth of 2 road optical sensor data lines access single-chip microcomputer.

Control module adopts the STC12C5A60S2 single-chip microcomputer as core processor, inner integrated MAX810 Special reset circuit, have 4 16 bit timing devices, 8 tunnel 10 precision A/D conversions, 56K Flash storage space, 1280 byte RAM, can satisfy the work such as data acquisition, default, Based Intelligent Control, for the function of system realizes providing the foundation and ensureing.Wherein the P0 mouth is connected with 8 circuit-switched data mouths of liquid crystal display; P1.0～P1.4 is connected with the liquid crystal control end; P1.6, P1.7 connect optical sensor, read image data; P2.4～P2.7 is connected with four stand-alone keypad; P3.0, P3.1 connect the wireless GPRS module and realize reading and writing data, and P2.1～P2.3 links to each other with SIM900 module controls end; P4.0～P4.3 links to each other with the SD card module.

Native system adopts the SD card can store mass data information by the storage of SD card data acquisition with communicating by letter with the top service device based on the wireless GPRS module realization of SIM900, be convenient to arrangement and the analysis of late time data, because the selected STCl2LE5A60S2 single-chip microcomputer of equipment has the SPI controller, therefore the reading in and store and adopt the spi bus mode of SD card data is simplified SD card running program.The wireless GPRS module adopts the SIM900 module to be responsible for data acquisition and transmission, the SIM900 module adopts powerful ARM926EJ-S chip processor, has industry standard interface, stable performance, outward appearance is small and exquisite, cost performance is high, can satisfy the various demands of user, single-chip microcomputer will gather ambient lighting information by serial port and be handed down to the SIM900 module, SIM900 packs the data to the TCP/IP packet automatically, and connect by GPRS network and top service device, illumination information is sent to the top service device, realize the real-time Transmission of data.

User interactive module is divided key-press module and LCD MODULE, and completion system setting parameter and real-time information show.Key-press module adopts four independent buttons, realization time, latitude and the isoparametric setting of detection wave band, and circuit is simple, easily control, and can satisfy request for utilization; Liquid Crystal Module adopts the OCM12864-3 liquid crystal display, but Display of Chinese characters and numeral, Chinese character is 16 * 16 dot matrix, numeral is 8 * 16 dot matrix; Adopt simultaneously parallel transmission, message transmission rate is fast, can realize real-time demonstration.

System software adopts modular design, comprises master routine, sensor parsing subroutine, subrane PFD counting subroutine, SD clamp program, the SIM900 subroutine.Behind the program start, judge whether initialization, if no initializtion then initialization liquid crystal, sensor and SD card module and SIM900 module, otherwise the system that directly enters arranges the interface, and system time, latitude and detection wave band are set.System cycle testing environment illumination information also is transferred to single-chip microcomputer with data mode, account for visible light ratio and sun altitude match relation according to specific band spectrum, and the funtcional relationship between light quantum flux density and the visible light different-waveband light intensity, obtain subrane PFD data.As shown in Figure 3, at first determine whether first when program brings into operation or re-power, if for first or re-power, then reading system date and latitude information and calculate it and the day interval number of days d in the Spring Equinox in the current year; Otherwise with system data and Last Read Date relatively, if enter new one day then the d value adds 1, otherwise directly calculate declination.Then calculate real-time hour angle according to system time, and then obtain sun altitude, statistical model by sun altitude and specific band spectrum proportion, obtain specific band spectrum proportion, and then calculate specific band light quantum flux density, and be presented on the liquid crystal display, determine whether to call SD clamp program by the detection to the SD card, judge whether to detect upper layer device and determine whether enable the SIM900 subroutine, program flow diagram as shown in Figure 2.

A specific embodiment of above-mentioned subrane PFD counting subroutine:

At first, within a calendar year continuous three months, every day is from 8:00-17:30, every visible light subrane light intensity of half an hour measurement and the total light intensity of visible light, again according to detection time and detection geographic position, take sun altitude H as transverse axis, take each band of light conversion visible light ratio as ordinate, match each band of light conversion visible light ratio and sun altitude corresponding relation, carry out match as example by Matlab take red, blue light, wherein the matched curve of red sun elevation angle corresponding relation as shown in Figure 4.

According to matched curve, the red spectral band number percent of measuring under the different sun altitudes is $\mathrm{redper}=\frac{{73.572}^{-0.2404}}{100}\×100\%,$ Blue wave band number percent is $\mathrm{blueper}=\frac{3.0067\ln H-0.1382}{100}\×100\%,$ The percentage calculation process of all the other band of light is similar.

Then according to formula

Calculate specific single band light quantum flux density, wherein, H is sun altitude,

Be latitude; δ is declination; ω is the real-time hour angle of the sun, and δ=23.5 ° sin0.986d, d be for detecting day and day interval number of days in Spring Equinox then, ω=(hour-12+min/60) * 15 °; Hour represents hour value of Measuring Time, and min represents minute value of Measuring Time, and 24 hours Beijing time system is taked in the Measuring Time metering, and VL is the total light intensity of visible light, and h is Planck constant, and c is the vacuum velocity of wave; λ is for measuring the mean wavelength of wave band, and n is Avogadro's number.

The measurement place is Yang Ling: latitude is that 34.16 °, measurement date are 2012.11.11

Claims (2)

1. the illumination checkout equipment based on single band light quantum flux density model is characterized in that, comprising:

Sensor assembly is used for certain period within a calendar year, the total light intensity of visible light under the continuous coverage same time of every day;

User interactive module is used for arranging system data and detects wave band, and by the real-time information of liquid crystal display display environment;

Control module connects described sensor assembly and user interactive module, receives the total light intensity of visible light that described sensor assembly measures;

The GPS module for the latitude information that obtains the location real-time and precise, realizes that sun altitude calculates obtaining of correlation factor;

The SD card module carries out real-time storage to the information of optical sensor collection, and realizes the wireless transmission of data by the GPRS module take SIM900 as core;

Power module is used for whole system is powered.

2. checkout equipment according to claim 1 is characterized in that, described sensor assembly is the visible light optical sensor.

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