WO2022136396A1 - Dispositif et methode de mesure d'irradiance - Google Patents
Dispositif et methode de mesure d'irradiance Download PDFInfo
- Publication number
- WO2022136396A1 WO2022136396A1 PCT/EP2021/087035 EP2021087035W WO2022136396A1 WO 2022136396 A1 WO2022136396 A1 WO 2022136396A1 EP 2021087035 W EP2021087035 W EP 2021087035W WO 2022136396 A1 WO2022136396 A1 WO 2022136396A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- irradiance
- temperature
- light detection
- measuring
- detection means
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000001514 detection method Methods 0.000 claims abstract description 72
- 238000012545 processing Methods 0.000 claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 claims abstract description 8
- 230000000052 comparative effect Effects 0.000 claims description 43
- 238000004891 communication Methods 0.000 claims description 24
- 230000005855 radiation Effects 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 claims description 19
- 230000006870 function Effects 0.000 claims description 17
- 230000007935 neutral effect Effects 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 31
- 238000009529 body temperature measurement Methods 0.000 abstract description 6
- 238000000691 measurement method Methods 0.000 abstract 1
- 230000004044 response Effects 0.000 description 8
- 238000012937 correction Methods 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005676 thermoelectric effect Effects 0.000 description 2
- 208000005156 Dehydration Diseases 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010399 physical interaction Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0418—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using attenuators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0295—Constructional arrangements for removing other types of optical noise or for performing calibration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
- G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J2001/4266—Photometry, e.g. photographic exposure meter using electric radiation detectors for measuring solar light
Definitions
- TITLE Irradiance measurement device and method
- the present invention relates to a device, in particular a pyranometer, for determining a measurement of solar irradiance and to a system comprising such a device.
- the invention also relates to a method for measuring irradiance.
- a pyranometer is a sensor used to measure the amount of solar energy in natural light and is used in particular in meteorology. It allows the measurement of the power of total solar radiation in watts per square meter. In the field of agriculture, this value is important because it provides information on the evapotranspiration of water, which concerns all the phenomena leading to the evaporation of water by plants and the soil, and therefore on the need or not to irrigate the fields. This value also makes it possible to monitor and assess the water stress of different species, i.e. the resilience of species to the absence of irrigation. Such devices are known in the state of the art, for example in WO 2009/068710 A1 or EP 3480570 A1.
- thermoelectric effect to measure the incident short-wave radiation by using thermopiles
- photoelectric effect by using photodiodes
- photodiodes have an advantage due to their low cost and simplicity of design, they have a limited spectral sensitivity range, typically between 400nm and 1100nm. In addition, they require calibration using an external source of spectral properties comparable to the sun. This calibration can for example be done manually by adjusting a potentiometer so that the output signal corresponds to the power of the radiation from the external source. Moreover, the potentiometers are also subject to thermal drifts, which can falsify the calibration of the photodiodes. Thus, the reliability of the measurement remains to be improved.
- the object of the present invention is to improve the reliability of the measurement of solar irradiance by a device, in particular a pyranometer, which makes it possible to obtain a measurement of the solar irradiance in a precise, simpler and more efficient manner by providing improved calibration / calibration compared to the state-of-the-art device.
- the object of the invention is achieved by providing a device, in particular a pyranometer, for measuring solar irradiance, comprising a light detection means, in particular a photodiode, and a temperature measuring means, the means temperature measuring device being configured to measure the temperature of the light detection means, and a data processing means configured to determine the irradiance by taking into account in-situ the temperature of the light detection means.
- a device for measuring solar irradiance
- the means temperature measuring device being configured to measure the temperature of the light detection means
- a data processing means configured to determine the irradiance by taking into account in-situ the temperature of the light detection means.
- the output signal of the light detection means for example a current or a voltage, can be influenced by a change in temperature.
- the accuracy of the device can be improved compared to state-of-the-art devices.
- the temperature measurement means and the light detection means can be mounted on the same printed circuit, in particular side by side.
- the temperature sensor is in thermal contact with the light detection means and makes it possible to measure the actual temperature of the light detection means and not the ambient temperature outside or inside the device. This actual temperature can be much higher than the ambient temperature.
- the measurements made by the device can therefore be corrected by taking into account the temperature of the detection means and make it possible to reduce the influence of the temperature on the measurements of the light detection means.
- the accuracy of the device can be improved.
- the light detection means can be a photodiode configured to be used in reverse bias.
- the reverse-biased photodiode has a linear response of voltage as a function of irradiance. This makes it possible to further reduce the influence of the temperature on the irradiance measurement of the device according to the invention with respect to the measurement made with a photodiode used as a voltage generator, or also called a photodiode in photovoltaic mode.
- the response is faster than in the "open circuit" mode.
- the device may further comprise a conversion means, in particular a resistor, even more in particular a fixed resistor, the conversion means being connected to the light detection means.
- the conversion means can be mounted on the same printed circuit on which the temperature measuring means and the light detection means are mounted.
- the temperature sensor is also in thermal contact with the conversion means and makes it possible to measure the actual temperature of the conversion means.
- the measurements made by the device can therefore be corrected by taking into account the temperature of the conversion means and make it possible to reduce the influence of the temperature on the conversion means.
- the accuracy of the device can be improved compared to state-of-the-art devices.
- the data processing means may comprise a microprocessor, a memory, in particular an EEPROM type memory, and an analog-to-digital converter.
- the memory can comprise a table of calibration or calibration coefficients as a function of temperature and the data processing means can be configured to determine the irradiance as a function of temperature using a or several calibration coefficients from the table of calibration coefficients stored in the memory.
- the calibration of the light detection means is made taking into account its temperature and makes it possible to reduce the influence of the temperature on the measurement of the irradiance of the light detection means.
- the accuracy of the device can be improved compared to state-of-the-art devices.
- the device may comprise an optical filter placed upstream of the light detection means, with respect to the radiation entering during use of the device.
- the filter can preferably be placed between an opening of the device and the light detection means.
- the light detection means is protected by the optical filter from possible degradation due to exposure to UV rays or chemicals, or due to covering by contaminants such as dust or pollen.
- the optical filter can be a neutral density filter, in particular a neutral density reflection filter, even more in particular a metallic neutral density filter.
- a neutral density filter makes it possible to reduce the intensity of the radiation entering the device and arriving on the light detection means, without altering the relative spectral distribution of the energy.
- the light detection means receives a sufficiently low quantity of radiation not to saturate it.
- the neutral density filter is a metal neutral density filter which attenuates light by reflection and is less sensitive to temperature variations than glass or gelatin neutral density filters.
- the device may also comprise a means of communication, in particular a means of wireless communication.
- the device can connect to a remote center through its means of communication to exchange data. Based on the exchanged data, the device can be tested remotely, or be re-calibrated, or updated, or it can be decided to perform device maintenance.
- the object of the invention is also achieved by a system for measuring solar irradiance, comprising at least one device for measuring solar irradiance as described previously, a comparative device having light detection means of the same type that the at least one device for measuring solar irradiance, in which the comparative device comprises a means of communication, in particular a means of wireless communication, and the comparative device is configured to send information relating to a calibration coefficient to at least one irradiance measuring device via the communication means.
- the system can remotely compare the light detection means of the comparative device with that of the at least other device for measuring solar irradiance, without having to bring the at least other device for measuring solar irradiance back to the factory.
- the system can verify the calibration of the at least one solar irradiance measuring device and decide if a re-calibration of the at least one solar irradiance measuring device is necessary.
- the comparative device can be placed next to a standard device having a higher precision than the light detection means of the comparative device and which sends its data to the comparative device.
- the comparative device may include temperature measuring means configured to measure the temperature of the light sensing means, and can be configured to send information about the calibration coefficient as a function of temperature.
- the comparative device also performs a measurement of the irradiance made as a function of the temperature of its light detection means.
- the system can verify the operation of the at least one device.
- the at least one device already in position in a field, can thus be tested remotely, or be re-calibrated, or updated, or it can be decided to carry out maintenance of the device.
- the object of the invention is also achieved by a method for measuring irradiance, in particular solar irradiance, using a pyranometer device or a system as described above comprising a step of measuring a voltage (U ) representative of the incident irradiance on the light detection means and, a step of measuring the temperature of the light detection means by a temperature measurement means, and a step of calculating the incident irradiance (Y) in-situ by the incident irradiance data processing means on the basis of the measured voltage (U) and using a calibration coefficient b(T) from the table of calibration coefficients chosen as a function of the temperature T measured.
- the temperature sensor makes it possible to measure the actual temperature of the light detection means and not the ambient temperature outside or inside the device.
- the measurements made by the device can therefore be corrected by taking into account the temperature of the detection means and make it possible to reduce the influence of the temperature on the measurements of the light detection means.
- the precision of the device can be improved compared to the devices of the state of the art.
- a component such as a potentiometer.
- the method for measuring the irradiance using a pyranometer device or a system as described above can comprise a step of receiving one or more values of the modified calibration coefficient b(T) ( s) by the means of communication and the replacement of the corresponding value or values existing in the data processing means by the value or values received.
- the calibration coefficients without physical intervention by a user or without returning the device to the factory, in order, for example, to take into account a change in the calibration coefficients due to aging. This update/correction is done internally and in-situ in the device.
- the method can comprise a step of reception by the comparative device of a value of the solar irradiance measured by a standard device having a higher accuracy than the light detection means of the comparative device, the comparative device being positioned adjacent to the standard device, a step of comparing the value received with the irradiance measured by the comparative device, a step of calculating calibration coefficients of the comparative device modified according to the solar irradiance data received by the comparative device and a step of sending the calculated calibration coefficients of the comparative device to the at least one device for measuring solar irradiance.
- a standard device having better accuracy it becomes possible to identify changes in the response of the light detection means, for example due to aging of the light detection means, and to correct the calibration coefficients of the other remote light detection means of the same type.
- Figure 1a schematically represents a view of an irradiance measuring device according to a first embodiment of the invention.
- Figure 1b shows a sectional view of the device of Figure 1a.
- Figure 1c illustrates the steps in using the device of Figure 1a.
- Figure 2 shows a device according to a third embodiment of the invention
- Figure 3a shows a system for measuring irradiance according to a fourth embodiment of the invention.
- Figure 3b shows a schematic of the method for fitting a table of calibration coefficients using the system as shown in Figure 3a.
- FIGS. 1a and 1b represent an irradiance measuring device 100 according to a first embodiment of the invention.
- device 100 is a pyranometer.
- a pyranometer measures the irradiance, therefore the power of incoming radiation per unit area measured in W/m 2 .
- the irradiance measured can be the solar irradiance or even the irradiance of any light source.
- device 100 comprises a housing 101 with a cylindrical main part 103, a support base 105 and a cover 107.
- the main part 103, support base 105 and cover 107 are connected together in a manner to form an airtight container.
- the interior of the box 101, and in particular a light detection means 109 illustrated in dotted lines, can be protected from bad weather.
- connection means 111 makes it possible to position the device 100 on a station meteorological station, as illustrated in FIG. 2.
- the connection means 111 can be a “plug and play” type means, allowing a quick and simple mechanical and electrical connection with a weather station having a compatible connection interface.
- Cover 107 has a through hole 113 as opening 113.
- cover 107 has beveled edges 115a, 115b to facilitate water drainage.
- the cover 107 projects beyond the wall of the main part 103 to direct rainwater away from the wall of the main part.
- the opening 113 lets in the solar radiation 117 inside the device.
- An optical filter 119 is placed in aperture 113 to attenuate the intensity of incoming radiation 117.
- the optical filter 119 is a neutral density filter.
- a reflective optical filter 119 is used, which comprises a metal layer on a borosilicate glass or polished fused silica window.
- the optical filter 119 covers a wavelength range of 350nm to 2500nm to decrease the intensity of incoming 117 radiation without altering the relative spectral distribution of energy.
- Optical filter 119 filters the visible spectrum evenly, thereby reducing the amount of radiation reaching photodiode 109, without affecting color or contrast.
- the light detection means 109 receives a sufficiently low quantity of radiation not to saturate.
- optical filter 119 is preferably a neutral density reflection filter allows the amount of radiation entering the device to be reduced, which avoids a temperature increase in the device due to higher absorption.
- the optical filter 119 may for example be a metallic neutral density filter from Knight Optical, model FNM1525.
- the FNM1525 filter has a transmission of 3.2% at 546nm, with an optical density of 1.5.
- the dimension of the filter is a diameter of the order of 25mm, a thickness of the order of 2mm. Since the filter is a flat filter, it includes a flatness less than 2A, over more than 90% of the filter diameter.
- any other type of neutral density optical filter can be used, depending on the spectrum of light necessary for the application of the device 100.
- the light detection means 109 is positioned under the optical filter 119, inside the box 101, in particular inside the cover 107, to receive incoming radiation 117.
- an optical system comprising one or more lenses can be positioned between the optical filter 119 and the light detection means 109 so as to concentrate the light entering the device through the optical filter 119 onto the light detection means. light 109.
- the light detecting means 109 in the first embodiment is a photodiode.
- any other type of light sensor can be used, such as a thermopile.
- the photodiode 109 can for example be a VISHAY silicon photodiode, model VEMD6060X01. This photodiode is a PIN type photodiode which comprises a sensitive zone with a dimension of 0.85 mm 2 detecting radiation between 380 nm and 1070 nm.
- the photodiode 109 of the device 100 is used in reverse biasing also called “photoconductive” mode. This means that the photodiode 109 is energized and is therefore supplied with energy. The greater the quantity of radiation 117 received by the photodiode 109, the greater the current, also called photo-current, passing through the photodiode 109. Photodiode 109 is connected to conversion means 121 for converting the photocurrent passing through photodiode 109 to an output voltage which is directly proportional to the photocurrent.
- the “photoconductive” mode makes it possible to reduce the response time of the photodiode 109 and allows faster measurements compared to the “open circuit” mode.
- the output signal level to be measured depends on the conversion means 121 chosen, which results here in a voltage of the order of a volt (V) in the case of the strongest radiation.
- the voltages to be measured are of the order of 100pV. This avoids having to use complex and expensive components to measure the voltage, as is the case in “open circuit”.
- the output signal of the photodiode 109 here an output current, or photocurrent, measured is linear with the power of the incoming radiation 117.
- This linear response makes it possible to obtain a reduction in the influence of the temperature on the irradiance measurements of the photodiode 109 compared to the logarithmic response during “open-circuit” operation of the photodiode 109.
- the conversion means 121 is a resistor.
- the resistor chosen is a fixed resistor, preferably with an accuracy of 0.1% or better at room temperature, therefore between 20°C and 25°C.
- the temperature coefficient is 10PPM/°C or 0.001%/°C or better. The choice of such a resistor makes it possible to reduce the effect of temperature on the calibration of the device.
- the conversion means 121 can be a transimpedance amplifier or any other device which makes it possible to convert a current into a voltage.
- the device 100 further comprises a temperature measuring means 123, in particular a temperature sensor.
- the temperature sensor 123 is located inside the box 101, at the level of the light detection means 109, in particular directly next to each other on the same printed circuit 125.
- the temperature sensor temperature 123 is preferably in thermal contact with the light sensing means 109.
- the temperature sensor 123 is thus configured to measure the temperature of the light detection means 109.
- the printed circuit 125 is black in color and/or a black outer casing is used for the printed circuit, to avoid the internal reflection of the radiation 117 entering the light detection means 109.
- the temperature has an impact on the calibration coefficient b, knowing that the interior of the device 100 can be subjected to temperatures ranging from about -20°C to about 60°C.
- the calibration coefficient b is therefore a function of the temperature b(T).
- the temperature is measured by the temperature sensor 123 at a regular time interval, for example every five minutes, whereas the irradiance measurement is made at a much longer regular time interval. short, for example every second.
- the device 100 comprises a data processing means 127 in the box 101 .
- the data processing means 127 comprises an analog-to-digital converter 129 for converting the signals received from the conversion means 121 and from the temperature measuring means 123.
- the data processing means 127 also comprises a microprocessor 131 which receives the digitized signals and is configured to determine the irradiance using calibration coefficients b(T) which are stored in an EEPROM type memory 133 with the measured temperature.
- the microprocessor 131 is also connected to a means of communication 135 which makes it possible to send and/or receive data, in particular to send the results of the irradiance measurement and/or to receive data, such as new calibration tables with the calibration coefficients b(T).
- the calibration of the device 100 to obtain the table of calibration coefficients b(T) as a function of the temperature T is carried out as follows.
- Device 100 is calibrated at the factory on an assembled device 100. Once calibrated, the device 100 can therefore be put into use, generally on a modular meteorological station.
- the light detection means 109 is calibrated, calibrated with a standard lamp, having a known radiation which is close to the spectral properties of the sun.
- the device 100 is placed in a climatic chamber and irradiance measurements are carried out at different temperatures, for example, in a range going from -20° C. to 60° C. with steps of 5°C.
- the output signal from the conversion means 121 can be adapted to the power actually received.
- the output voltage obtained at the terminals of the conversion means 121 can be matched to the power actually received.
- the components are chosen so that the calibration coefficient b between the irradiance Y (in W/m 2 ) and the output voltage U (in V) is of the order of 1 in (mVm 2 /W).
- the calibration coefficient b between the irradiance Y (in W/m 2 ) and the output voltage U (in V) is of the order of 1 in (mVm 2 /W).
- the standard lamp illuminates the light detection means 109 with different intensities ranging from 0 to 1 Sun with steps, for example of 0.1 Sun.
- the unit of irradiation of 1 Sun corresponds to 988W/m 2 , according to the AM 1.5G standard dated January 2003.
- a linear regression is used between the measured values and the known radiation values of the standard lamp to obtain the value of the calibration coefficient b as a function of the temperature T measured by the temperature sensor 123.
- a table of calibration coefficients comprising a plurality of calibration coefficients b(T). This table is then stored in the memory 133 of the data processing device 127.
- each device 100 may be advantageous to calibrate each device 100 according to the radiation of a standard lamp for only a given temperature and to model the dependence of the calibration coefficient b for each device according to the temperature on the basis the temperature dependence of the calibration coefficient b obtained by a sample, for example from fifty to several hundred devices with photodiodes 109 of the same type.
- the calibration is done digitally avoiding any manual intervention on the hardware components of the device. Unlike state-of-the-art devices, no potentiometer adjustment is required. At the same time, the device according to the invention becomes less sensitive to temperature variations of the photodiode.
- the irradiance measuring device 100 according to the invention is used as illustrated in FIG. 1c.
- the voltage U is determined at the output of the conversion means (step 141) and the temperature T of the light detection means 109 is measured by the temperature measuring means 123 (step 143).
- the two values U and T are converted by the analog-digital converter 129.
- the microprocessor 131 determines the irradiance using the calibration coefficient b corresponding to the temperature measured at step 143 of the light detection means 109 using the table of calibration coefficients stored in the memory 133.
- the influence of the temperature of the detection means of light 109 on the value of the calibration coefficient b is taken into account to obtain a more precise measurement of the irradiance.
- the irradiance value determined at step 147 can be sent to the remote user.
- the communication means 135 of the device 100 also allows the device 100 to receive a new table of calibration coefficients from a central unit, for example, to be able to update the table of calibration coefficients.
- the new calibration coefficient table received by the device 100 can comprise one or more modified calibration coefficient values b(T).
- a step of replacing the table of calibration coefficients by the new table of calibration coefficients is thus carried out in the data processing means 127.
- the updating/correction of the calibration table of the light detection means is made in situ at the device 100. It is not necessary to return the device to the manufacturer to carry out a calibration or a re-calibration of the light detection means of the device using manual external calibration means.
- the device 100 can receive only one or more values of calibration coefficient b(T) modified by the communication means 135 and not a new table of calibration coefficients b(T).
- the updating of the calibration coefficient table in the memory is done by replacing the corresponding value(s) existing in the data processing means by the value(s) received.
- FIG. 2 shows a device 200 for measuring irradiance according to a third embodiment.
- the only difference between device 200 and device 100 according to the first or second embodiment is the fact that device 200 does not include communication means 129 allowing remote communication.
- Device 200 is mounted on weather station 201 using interface 111. Data is exchanged between irradiance device 200 and weather station 201. Modular station 201 can send received data to a remote control unit connected wirelessly using a means of communication 203 positioned on the modular meteorological station 201. Thus, it is possible to simplify the irradiance device 200 by using the means of communication 203 which already exists.
- the device according to the first to the third embodiment of the invention can be self-sufficient in energy.
- the irradiance device may comprise an autonomous device for supplying energy, in particular solar, thermal and/or wind energy. This allows the installation of the irradiance device without the need for installation of power lines.
- one or more devices 100 or 200 according to the embodiments described above can form a system for measuring solar irradiance with a comparative device and/or a central unit .
- a system for measuring irradiance 300 is shown in Figure 3a.
- the system for measuring irradiance 300 comprises a central unit 301, a comparative device 303 for measuring solar irradiance, and at least one other device for measuring irradiance, preferably several devices 100a, 100b, 100c for measuring solar irradiance.
- solar irradiance according to the first, second or third embodiment.
- the devices 100a, 100b, 100c are already used and are for example placed in a field.
- the comparative device 303 comprises a light detection means 109 of the same type as the devices 100a, 100b, 100c.
- the comparative device 303 is a device according to the first, second or third embodiment and thus also comprises a temperature measurement means 123. All the characteristics of the devices 100a -100c and of the comparative device 303 of the fourth embodiment which are common with the device 100 of the first embodiment illustrated in Figures 1a and 1b will not be described again, but reference is made to their description above with the same reference numerals used in Figures 1a to 1b.
- the comparative device 303 and the central unit 301 are integrated into a single device.
- the devices 100a, 100b, 100c, 301, 303 of the system comprise a means of communication 135 and/or 203 which allows communication between them or at least between the central unit 301 and each of the irradiance measuring devices 100a , 100b, 100c.
- the comparative device 303 is arranged near or adjacent to a standard device 305 which may not be part of the system 300.
- the standard device 305 has a higher accuracy in measuring irradiance than the comparative device 303.
- the standard device 305 may be a weather station from a specialized service such as Mcieo France and/or other European or worldwide equivalents.
- System 300 operates in the following manner illustrated by Figure 3b.
- the standard device 305 sends data, for example concerning the solar irradiance, using its means of communication 307. During step 311, these data can be received by the comparative device 303.
- the comparative device 303 can carry out a verification of its own irradiance measurement carried out by its light detection device 109 as a function of the temperature T by comparing it with the irradiance measurement received from the standard device 305 as illustrated by step 313. In the event of disagreement between the measurements, the comparative device 303 updates, as illustrated in step 315, the table of calibration coefficients and/or determines a correction factor to be applied to the values b(T) in the table of calibration coefficients.
- the comparative device 303 sends in step 317 the new table of calibration coefficients and/or the correction factor to the central unit 301 of the system 300 which, at step 319 relays this new information to the irradiance measuring devices 100a, 100b, 100c.
- the irradiance measuring devices 100a, 100b, 100c can update their table of calibration coefficients in their respective memory 133.
- the system 300 can initiate the updating of the calibration coefficients of the other devices 100a, 100b, 100c without an agent having to move. It is therefore possible, for example, to take into account changes in behavior due to aging which, to a first approximation, are the same for devices manufactured in the same way and using the same type of light detection means 109.
- the central unit 301 can also be configured to remotely test the correct operation of the devices 100a, 100b, 100c already in position. Following the test, one or more of the devices 100a, 100b, 100c can be re-calibrated and/or updated. If necessary, it can also be decided to carry out maintenance of the device on site.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/258,652 US20240035881A1 (en) | 2020-12-21 | 2021-12-21 | Device and method for measuring irradiance |
EP21839580.4A EP4264207A1 (fr) | 2020-12-21 | 2021-12-21 | Dispositif et methode de mesure d'irradiance |
CA3202785A CA3202785A1 (fr) | 2020-12-21 | 2021-12-21 | Dispositif et methode de mesure d'irradiance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2013867 | 2020-12-21 | ||
FR2013867A FR3118163B1 (fr) | 2020-12-21 | 2020-12-21 | Dispositif et méthode de mesure d’irradiance |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022136396A1 true WO2022136396A1 (fr) | 2022-06-30 |
Family
ID=74554145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/087035 WO2022136396A1 (fr) | 2020-12-21 | 2021-12-21 | Dispositif et methode de mesure d'irradiance |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240035881A1 (fr) |
EP (1) | EP4264207A1 (fr) |
CA (1) | CA3202785A1 (fr) |
FR (1) | FR3118163B1 (fr) |
WO (1) | WO2022136396A1 (fr) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009068710A1 (fr) | 2007-11-28 | 2009-06-04 | Universidad De Huelva | Pyranomètre |
EP3480570A1 (fr) | 2017-11-01 | 2019-05-08 | Eko Instruments Co., Ltd. | Pyranomètre et dispositif photométrique |
-
2020
- 2020-12-21 FR FR2013867A patent/FR3118163B1/fr active Active
-
2021
- 2021-12-21 US US18/258,652 patent/US20240035881A1/en active Pending
- 2021-12-21 CA CA3202785A patent/CA3202785A1/fr active Pending
- 2021-12-21 WO PCT/EP2021/087035 patent/WO2022136396A1/fr active Application Filing
- 2021-12-21 EP EP21839580.4A patent/EP4264207A1/fr active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009068710A1 (fr) | 2007-11-28 | 2009-06-04 | Universidad De Huelva | Pyranomètre |
EP3480570A1 (fr) | 2017-11-01 | 2019-05-08 | Eko Instruments Co., Ltd. | Pyranomètre et dispositif photométrique |
Non-Patent Citations (5)
Title |
---|
ACHLEITNER STEFAN ET AL: "SIPS: Solar Irradiance Prediction System", IPSN-14 PROCEEDINGS OF THE 13TH INTERNATIONAL SYMPOSIUM ON INFORMATION PROCESSING IN SENSOR NETWORKS, IEEE, 15 April 2014 (2014-04-15), pages 225 - 236, XP032613171, ISBN: 978-1-4799-3146-0, [retrieved on 20140630], DOI: 10.1109/IPSN.2014.6846755 * |
ANONYMOUS: "Thorlabs.com - Photodiodes and Photoconductors Tutorials", 2 September 2021 (2021-09-02), XP055837108, Retrieved from the Internet <URL:https://www.thorlabs.de/newgrouppage9_pf.cfm?guide=10&category_id=&objectgroup_id=9020> [retrieved on 20210902] * |
LÓPEZ LORENTE JAVIER ET AL: "Worldwide evaluation and correction of irradiance measurements from personal weather stations under all-sky conditions", SOLAR ENERGY, ELSEVIER LTD, vol. 207, 18 July 2020 (2020-07-18), pages 925 - 936, XP086263041, ISSN: 0038-092X, [retrieved on 20200718], DOI: 10.1016/J.SOLENER.2020.06.073 * |
UNDEFINED: "ISO - ISO 9847:1992 - Solar energy - Calibration of field pyranometers by comparison to a reference pyranometer", 1 July 1992 (1992-07-01), XP055837265, Retrieved from the Internet <URL:https://www.iso.org/standard/17725.html> [retrieved on 20210902] * |
WILBERT S ET AL: "Best Practices for Solar Irradiance Measurements with Rotating Shadowband Irradiometers A report of IEA SHC Task 46, Solar Resource Assess- ment and Forecasting", 18 August 2015 (2015-08-18), XP055836496, Retrieved from the Internet <URL:https://task46.iea-shc.org/Data/Sites/1/publications/INSRSI_IEA-Task46B1_BestPractices-RSI_150819.pdf> [retrieved on 20210831] * |
Also Published As
Publication number | Publication date |
---|---|
FR3118163B1 (fr) | 2023-07-21 |
CA3202785A1 (fr) | 2022-06-30 |
EP4264207A1 (fr) | 2023-10-25 |
FR3118163A1 (fr) | 2022-06-24 |
US20240035881A1 (en) | 2024-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3198311B1 (fr) | Ensemble et procédé de détection pour l'identification et le suivi de nuage dans une zone du ciel observée | |
EP0225210B1 (fr) | Appareil de spectro-colorimétrie à fibres optiques | |
EP2165179A1 (fr) | Dispositif de mesure optoelectronique de l'hydratation d'un vegetal dans son environnement naturel | |
US9482583B1 (en) | Automated heliostat reflectivity measurement system | |
Zibordi et al. | Protocols for satellite ocean color data validation: In situ optical radiometry | |
FR3052556A1 (fr) | Ensemble d'imagerie pour drone et systeme comprenant un tel ensemble monte sur un drone volant | |
EP3599718B1 (fr) | Caractérisation optique des propriétés de transport électronique d'un module photovoltaïque bifacial | |
WO2022136396A1 (fr) | Dispositif et methode de mesure d'irradiance | |
EP2368104B1 (fr) | Sonde optique d'absorption pourvue d'un monitoring de la source d'émission | |
Pietras et al. | Calibration of Sun photometers and sky radiance sensors | |
CA2788911C (fr) | Methode de determination sans contact de caracteristiques d'un photoconvertisseur. | |
FR3084158A1 (fr) | Methode et dispositif de caracterisation de filtres optiques | |
US8111392B1 (en) | Raman spectrometer with display of laser power at the sample | |
Muller et al. | Indoor and Outdoor Test Results for" DUSST", a Low-Cost, Low-Maintenance PV Soiling Sensor | |
Fabricius et al. | Quantum efficiency characterization of back-illuminated CCDs: Part II. Reflectivity measurements | |
WO2005108959A1 (fr) | Dispositif et procede de mesure de la reflectivite d'une cellule solaire | |
FR2974899A1 (fr) | Telescope multispectral a balayage comportant des moyens d'analyses de front d'onde | |
Mueller et al. | Characterization of oceanographic and atmospheric radiometers | |
EP2508856B1 (fr) | Procédé et capteur pour rayonnement solaire, et fenètre active comprenant un tel capteur | |
FR2944143A1 (fr) | Detection de salissure | |
FR3070559B1 (fr) | Procede et dispositif de caracterisation d'un module photovoltaique | |
FR3118362A1 (fr) | Dispositif photovoltaïque de référence universel | |
WO2021111091A1 (fr) | Spectromètre optique et procédé de caractérisation d'une source associé | |
BE1019539A3 (fr) | Methode de determination de la transmission opto-energetique d'un materiau transparent ou translucide et dispositif pour sa mise en oeuvre. | |
FR2478815A1 (fr) | Procede et appareil d'evaluation de la visibilite |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21839580 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3202785 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18258652 Country of ref document: US |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112023012288 Country of ref document: BR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021839580 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021839580 Country of ref document: EP Effective date: 20230721 |
|
ENP | Entry into the national phase |
Ref document number: 112023012288 Country of ref document: BR Kind code of ref document: A2 Effective date: 20230620 |