WO1990001685A1 - Apparatus for measuring the illumination - Google Patents

Apparatus for measuring the illumination Download PDF

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Publication number
WO1990001685A1
WO1990001685A1 PCT/BE1989/000038 BE8900038W WO9001685A1 WO 1990001685 A1 WO1990001685 A1 WO 1990001685A1 BE 8900038 W BE8900038 W BE 8900038W WO 9001685 A1 WO9001685 A1 WO 9001685A1
Authority
WO
WIPO (PCT)
Prior art keywords
illumination
measuring device
measuring
sensor
optical sensor
Prior art date
Application number
PCT/BE1989/000038
Other languages
French (fr)
Inventor
Georges Salles
Hélène Margery
Michel Vandevelde
Original Assignee
Georges Salles
Margery Helene
Michel Vandevelde
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Georges Salles, Margery Helene, Michel Vandevelde filed Critical Georges Salles
Publication of WO1990001685A1 publication Critical patent/WO1990001685A1/en

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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
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light
    • 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
    • G01J1/58—Photometry, e.g. photographic exposure meter using luminescence generated by light

Definitions

  • the present invention relates to a device for measuring the illumination.
  • the dosimeter used in radiology and in industries exposed to X-rays is also already known, measuring the doses of radiation absorbed by reception on a sensitive film which is then developed.
  • This device does not allow direct optical reading.
  • the device is bulky, heavy and expensive.
  • One of the essential aims of the present invention is to remedy these drawbacks by presenting an apparatus making it possible to measure the light intensity over a certain period of time in a handy form and with reduced dimensions, so to be able to wear it on the wrist, for example.
  • the apparatus comprises an optical sensor intended to collect the illumination, and a totalizer intended to accumulate during a unit of time the illumination collected by said optical sensor.
  • the optical sensor comprises a photoresist cell whose resistance varies with the illumination collected, said sensor being protected by at least one means for converting ultraviolet radiation into visible radiation intended to be directed on the photoresist cell.
  • the conversion means is formed by a superposition of two transparent sheets and a layer of a salt powder, having fluorescence properties, said layer being between the two sheets so as to obtain said conversion.
  • FIG. 1a is a diagrammatic representation of an embodiment of the measuring device according to the invention.
  • FIG. 1b is a sche ⁇ matic representation of another embodiment of the measuring device according to the invention.
  • Figure 2 is an exploded view of a schematic representation of a UV converter used in the apparatus.
  • Figure 3 is a representation of the electrical diagram for the measuring device according to the invention.
  • the figure represents a sensitometric curve giving the relative sensitivity of a cadmium sulfide sensor as a function of the wavelength of the incident radiation. expressed in ngs ⁇ rom.
  • an optical sensor 2 comprising a photoresist cell not shown.
  • This optical sensor 2 is protected by a means for converting ultraviolet rays not shown in the figure.
  • the color-resistant cell is, for example, of the cadmium sulfide (CdS) type, this type of cell reacting like the eye as can be seen on the sensitometric curve represented in FIG.
  • CdS cadmium sulfide
  • the conversion means transforms ultraviolet rays into visible light.
  • the light signals corresponding to this visible light are intended to be directed onto the photoresist cell which reacts to these incident light signals.
  • This conversion means is formed by a superposition of two transparent sheets 25, 27 between which there is a layer of salt powder 26, as illustrated in FIG. 2.
  • the transparent sheets 25, 27 can be, for example, plastic or quartz.
  • Salt powder has fluorescence properties, and it is intended to transform the incident ultraviolet radiation into visible radiation.
  • the composition of this powder is established for example as follows: between 18 and 22% of zinc silicate, between 31 and 35% of borate cadmium and between 4 and 49% of magnesium tungstate, and preferably 20? ⁇ of zinc silicate, 33% of cadmium borate and 47% of m agnesium tungstate, so as to obtain a transformation of short, so-called ultraviolet rays UV-B, which are the most toxic for the skin in visible light, and in particular a transformation of the corresponding wavelength ranges from 250 to 300 nm into 4S0 to 61 5 nm, representing the visible range.
  • the device can advantageously be provided with a small bail 28.
  • the measuring device comprises the sensor 2 which is close to the corner of the housing 1 forming a rounded 24.
  • the sensor 2 is protected by a small wheel 23 centered on four different optical filters 8, 9, 10, 1 1, as illustrated in the figure Ibis.
  • These filters are advantageously chosen according to the lasers used in medicine, such as for example, in addition to the aforementioned ultraviolet conversion means, an infrared laser filter for a wavelength of the order of 907 nm, a helium neon laser filter for a wavelength on the order of 632 nm and a visible light filter.
  • the desired protection of the sensor is obtained by rotating the small wheel up to the corner of the housing 1 forming the rounding 24, the radius of which corresponds to that of the small wheel 23.
  • the small wheel 23 is provided with a knurled edge 25 in order to avoid slipping of the fingers during the handling of the small wheel 23.
  • the measuring device is intended for professional use, in particular in professional dosimetry for light users as a treatment where it is necessary to use filters suitable for the wavelengths of radiation used as described below. -above.
  • This device allows direct optical reading.
  • several operating members are provided on the upper face 3 of the housing 1, for example buttons in relief.
  • a first operating member 5 is used to reset the illumination measured and displayed on a display device 4, for example with light diodes, provided on the upper face 3 of the housing 1.
  • a second operating member 6 makes it possible to obtain the cumulative value of the illumination over a certain period of time between the time when the reset member 5 was actuated for the last time and the time when the totalizing member 6 is activated.
  • An additional operating member 7 is also provided. It is intended for switching the display device 4 on or off.
  • FIG. 3 we can distinguish on the one hand an oscillator 8 and on the other hand a totalizer 14 to which the oscillator 8 is connected.
  • the oscillator 8 is powered for example by a small battery and it contains a photoresist cell 9. This cell 9 is connected to a protection capacitor 1 1 and to an integrated circuit 10. The oscillator 8 further comprises two adjustment resistors 12 and 13.
  • the oscillator circuit is designed so that the frequency of the signals generated is proportional to the amount of light received by the photoresist.
  • the light received is transformed by the sensor into an equivalent resistance.
  • a generation of square signals is obtained at the output of oscillator 8 which is a function of the amount of light received by the sensor.
  • This display device 4 The inputs of this display device 4 are connected to a common cathode 18, one end of which is in contact with the channel 19.
  • This channel 19 controls the segments of the display characters, such as numbers.
  • the other end of the cathode is connected to a channel used to control the activation of the figures individually.
  • a contact 29 is controlled which is connected to the integrated circuit 16, by means of which the reset is carried out.
  • a contact 30 is controlled which is also connected to the integrated circuit 16, by means of which the totalization of the illumination is carried out.
  • the oscillator used includes the following elements: a photoresist cell LDR 0.7, a protection capacity of 10 ⁇ F, an integrated circuit NE 555 very precise, very stable and not dependent on the supply voltage, two resistors, that connected to the capacity, 100 k ⁇ . and the other of 2.2 k-n_.
  • the measuring device according to the invention, a small, compact and handy device is obtained making it possible to measure the quantity of light received over a certain period of time, for example a day, a month or a year, and total this quantity over this period of time.

Abstract

The invention relates to an apparatus for measuring the illumination which comprises an optical sensor receiving the illumination and an adder (14) which cumulates during one time unit the illumination received by said optical sensor. The optical sensor is comprised of a photoresistant cell of which the resistance varies with the illumination received, said sensor being protected by at least one convergion means (8) which converts the ultraviolet radiation into visible radiation directed to the photoresistant cell.

Description

"Appareil de mesure de l'éclairement" "Illumination measuring device"
La présente invention est relative à un appareil de mesure de l'éclairement.The present invention relates to a device for measuring the illumination.
Un apport lumineux journalier approprié est important en matière de santé. Ainsi on connaît déjà les effets thérapeutiques du soleil sur la tuberculose. Le rayonnement solaire est bactéricide et a donc des effets sur l'acné juvénile. L'action du soleil est également bénéfique pour l'apport en vitamine D et contre des maladies, telles que le psoriasis, l'herpès, certains eczémas, et permet de lutter contre la dépression. Toutefois une surexposition au soleil peut accroître le risque d'un cancer de la peau, son vieillissement pré¬ maturé ou une déshydratation. Il existe par conséquent un besoin évi¬ dent pour un appareil permettant de mesurer l'éclairement, en particu¬ lier d' origine solaire. Les appareils existants pouvant m esurer l'éclairement sont formés par les photomètres tels qu'utilisés en photographie, mesurant l'intensité lumineuse de manière instantanée, sans étalement dans le temps, ce qui pour la présente application constitue un inconvénient car c'est précisément la totalisation de la lumière reçue sur un certain laps de temps qu'il faut connaître.An adequate daily light intake is important in terms of health. So we already know the therapeutic effects of the sun on tuberculosis. Solar radiation is bactericidal and therefore has effects on juvenile acne. The action of the sun is also beneficial for the intake of vitamin D and against diseases, such as psoriasis, herpes, certain eczemas, and helps fight against depression. However, overexposure to the sun can increase the risk of skin cancer, premature aging or dehydration. There is therefore an obvious need for a device for measuring the illumination, in particular of solar origin. Existing devices capable of measuring illumination are formed by photometers as used in photography, measuring the light intensity instantaneously, without spreading out over time, which for the present application constitutes a drawback because it is precisely the totalization of the light received over a certain period of time which must be known.
On connaît également déjà le dosimètre utilisé en radiologie et dans les industries exposées aux rayons X, mesurant les doses de radiation absorbée par réception sur un film sensible qui est ensuite développé. Cet appareil ne permet pas une lecture optique directe. En outre, l'appareil est encombrant, lourd et coûteux.The dosimeter used in radiology and in industries exposed to X-rays is also already known, measuring the doses of radiation absorbed by reception on a sensitive film which is then developed. This device does not allow direct optical reading. In addition, the device is bulky, heavy and expensive.
Un des buts essentiels de la présente in¬ vention est de remédier à ces inconvénients en présentant un appareil permettant de mesurer l'intensité lumineuse sur un certain laps de temps sous une forme maniable et aux dimensions réduites, de manière à pouvoir le porter sur le poignet, par exemple.One of the essential aims of the present invention is to remedy these drawbacks by presenting an apparatus making it possible to measure the light intensity over a certain period of time in a handy form and with reduced dimensions, so to be able to wear it on the wrist, for example.
A cet effet, l'appareil suivant l'invention comprend un capteur optique destiné à recueillir l'éclairement, et un totalisateur destiné à cumuler pendant une unité de temps l'éclairement recueilli par ledit capteur optique.To this end, the apparatus according to the invention comprises an optical sensor intended to collect the illumination, and a totalizer intended to accumulate during a unit of time the illumination collected by said optical sensor.
Suivant une forme de réalisation particu¬ lière de l'invention, le capteur optique comprend une cellule photorésistante dont la résistance varie avec l'éclairement recueilli, ledit capteur étant protégé par au moins un moyen de conversion de rayonnement ultraviolej en rayonnement visible destinée à être dirigée sur la cellule photorésistante.According to a particular embodiment of the invention, the optical sensor comprises a photoresist cell whose resistance varies with the illumination collected, said sensor being protected by at least one means for converting ultraviolet radiation into visible radiation intended to be directed on the photoresist cell.
Suivant une forme de réalisation avanta¬ geuse de l'invention, le moyen de conversion est formé par une superposition de deux feuilles transparentes et d'une couche d'une poudre de sel, présentant des propriétés de fluorescence, ladite couche étant comprise entre les deux feuilles de manière à obtenir ladite conversion.According to an advantageous embodiment of the invention, the conversion means is formed by a superposition of two transparent sheets and a layer of a salt powder, having fluorescence properties, said layer being between the two sheets so as to obtain said conversion.
D'autres détails et particularités de l'inven¬ tion ressortiront de la description donnée ci-après, à titre d'exemple non limitatif de quelques formes de réalisation particulières d'un appareil de mesure de l'éclairement suivant l'invention avec référence aux dessins annexés.Other details and particularities of the invention will become apparent from the description given below, by way of nonlimiting example of some particular embodiments of a device for measuring the illumination according to the invention with reference to the accompanying drawings.
La figure la est une représentation schéma¬ tique d'une forme de réalisation de l'appareil de mesure suivant l'invention.FIG. 1a is a diagrammatic representation of an embodiment of the measuring device according to the invention.
La figure lb est une représentation sché¬ matique d'une autre forme de réalisation de l'appareil de mesure suivant l'invention.FIG. 1b is a sche¬ matic representation of another embodiment of the measuring device according to the invention.
La figure 2 est une vue explosée d'une re- - présentation schématique d'un convertisseur UV utilisé dans l'appareil.Figure 2 is an exploded view of a schematic representation of a UV converter used in the apparatus.
La figure 3 est une représentation du schéma électrique pour l'appareil de mesure suivant l'invention.Figure 3 is a representation of the electrical diagram for the measuring device according to the invention.
La figure représente une courbe sensito- métrique donnant la sensibilité relative d'un capteur au sulfure de cadmium en fonction de la longueur d'onde du rayonnement incidente exprimée en ngsτrom.The figure represents a sensitometric curve giving the relative sensitivity of a cadmium sulfide sensor as a function of the wavelength of the incident radiation. expressed in ngsτrom.
Dans les différentes figures, les mêmes références se rapportent aux mêmes éléments.In the different figures, the same references relate to the same elements.
Sur la figure 1, on peut voir une forme de réalisation particulière d 'un appareil de m esure de l ' éclairement suivant l'invention se présentant sous la forme d'un petit boîtier 1 de forme aplatie.In Figure 1, we can see a particular embodiment of a device for measuring the illumination according to the invention in the form of a small housing 1 of flattened shape.
A la face supérieure 3 du boîtier 1 se trouve un capteur optique 2 comprenant une cellule photorésistante non représentée.On the upper face 3 of the housing 1 is an optical sensor 2 comprising a photoresist cell not shown.
Ce capteur optique 2 est protégé par un moyen de conversion de rayons ultraviolets non représentés sur la figure.This optical sensor 2 is protected by a means for converting ultraviolet rays not shown in the figure.
Lorsqu'un signal lumineux frappe la cellule photorésistante, ce signal lumineux exerce un effet sur la résistance électrique de cette cellule.When a light signal strikes the photoresist cell, this light signal has an effect on the electrical resistance of this cell.
La cellule pholorésistante est, par exemple, du type sulfure de cadmium (CdS), ce type de cellule réagissant comme l'oeil comme on peut le voir sur la courbe sensitométrique représentée sur la figure *+.The color-resistant cell is, for example, of the cadmium sulfide (CdS) type, this type of cell reacting like the eye as can be seen on the sensitometric curve represented in FIG.
Le moyen de conversion transforme les rayons ultraviolets en lumière visible.The conversion means transforms ultraviolet rays into visible light.
Les signaux lumineux correspondant à cette lum ière visible sont destinés à être dirigés sur la cellule photorésistante qui réagit à ces signaux lumineux incidents.The light signals corresponding to this visible light are intended to be directed onto the photoresist cell which reacts to these incident light signals.
Ce moyen de conversion est formé par une superposition de deux feuilles transparentes 25, 27 entre lesquelles se trouve une couche de poudre de sel 26, comme illustré sur la figure 2.This conversion means is formed by a superposition of two transparent sheets 25, 27 between which there is a layer of salt powder 26, as illustrated in FIG. 2.
Les feuilles transparentes 25, 27 peuvent être, par exemple, en matière plastique ou en quartz.The transparent sheets 25, 27 can be, for example, plastic or quartz.
La poudre de sel, quant à elle, présente des propriétés de fluorescence, et elle est destinée à transformer le rayonnement ultraviolet incident en rayonnement visible. La composition de cette poudre s'établit par exemple comme suit : entre 18 et 22 ?ό de silicate de zinc, entre 31 et 35 96 de borate de cadmium et entre 4 et 49 % de tungstate de magnésium, et de préférence 20 ?ό de silicate de zinc, 33 % de borate de cadmium et 47 % de tungstate de m agnésium, de manière à obtenir une transformation de rayons ultraviolets courts, dits UV-B, qui sont les plus toxiques pour la peau en lumière visible, et en particulier une transformation des plages de longueurs d'onde correspondantes de 250 à 300 nm en 4S0 à 61 5 nm , représentant le domaine visible.Salt powder, on the other hand, has fluorescence properties, and it is intended to transform the incident ultraviolet radiation into visible radiation. The composition of this powder is established for example as follows: between 18 and 22% of zinc silicate, between 31 and 35% of borate cadmium and between 4 and 49% of magnesium tungstate, and preferably 20? ό of zinc silicate, 33% of cadmium borate and 47% of m agnesium tungstate, so as to obtain a transformation of short, so-called ultraviolet rays UV-B, which are the most toxic for the skin in visible light, and in particular a transformation of the corresponding wavelength ranges from 250 to 300 nm into 4S0 to 61 5 nm, representing the visible range.
Afin de pouvoir être porté à une chaîne, par exemple autour du cou, l'appareil peut avantageusement être pourvu d'une petite bélière 28.In order to be able to be worn on a chain, for example around the neck, the device can advantageously be provided with a small bail 28.
Suivant une forme de réalisation supplémentaire de l'invention, l'appareil de mesure comprend le capteur 2 qui est à proximité du coin du boîtier 1 formant un arrondi 24. Le capteur 2 est protégé par une petite roue 23 axée sur quatre filtres optiques différents 8, 9, 10, 1 1, comme illustré sur la figure Ibis. Ces filtres sont avantageusement choisis en fonction des lasers utilisés en médecine, tels que par exemple, outre le moyen de conversion ultraviolet précité, un filtre infrarouge laser pour une longueur d'onde de l'ordre de 907 nm, un filtre hélium néon laser pour une longueur d'onde de l'ordre de 632 nm et un filtre à lum ière visible.According to an additional embodiment of the invention, the measuring device comprises the sensor 2 which is close to the corner of the housing 1 forming a rounded 24. The sensor 2 is protected by a small wheel 23 centered on four different optical filters 8, 9, 10, 1 1, as illustrated in the figure Ibis. These filters are advantageously chosen according to the lasers used in medicine, such as for example, in addition to the aforementioned ultraviolet conversion means, an infrared laser filter for a wavelength of the order of 907 nm, a helium neon laser filter for a wavelength on the order of 632 nm and a visible light filter.
On obtient la protection désirée du capteur en faisant tourner la petite roue à hauteur du coin du boîtier 1 formant l'arrondi 24, dont le rayon correspond à celui de la petite roue 23. A cet effet, la petite roue 23 est pourvue d'un bord moleté 25 afin d'éviter le glissement des doigts au cours de la manipulation de la petite roue 23.The desired protection of the sensor is obtained by rotating the small wheel up to the corner of the housing 1 forming the rounding 24, the radius of which corresponds to that of the small wheel 23. For this purpose, the small wheel 23 is provided with a knurled edge 25 in order to avoid slipping of the fingers during the handling of the small wheel 23.
L'appareil de mesure suivant cette forme de réalisation est destiné à un usage professionnel, notamment en dosimétrie professionnelle pour les utilisateurs de lumière comme traitement où il y a lieu d'employer des filtres appropriés aux longueurs d'ondes de rayonnements utilisés comme décrit ci-dessus.The measuring device according to this embodiment is intended for professional use, in particular in professional dosimetry for light users as a treatment where it is necessary to use filters suitable for the wavelengths of radiation used as described below. -above.
Cet appareil permet une lecture optique directe. A cette fin, plusieurs organes de manoeuvre sont prévus sur la face supérieure 3 du boîtier 1 , par exemple des boutons en relief .This device allows direct optical reading. To this end, several operating members are provided on the upper face 3 of the housing 1, for example buttons in relief.
Un premier organe de manoeuvre 5 sert à la remise à zéro de l'éclairement mesuré et affiché sur un dispositif d'affichage 4, par exemple à diodes lumineuses, prévu sur la face supérieure 3 du boîtier 1.A first operating member 5 is used to reset the illumination measured and displayed on a display device 4, for example with light diodes, provided on the upper face 3 of the housing 1.
Un second organe de manoeuvre 6 permet d'obtenir la valeur cumulée de l'éclairement sur un certain laps de temps entre le moment où l'organe de remise à zéro 5 a été actionné pour la dernière fois et le moment où l'organe totaliseur 6 est actionné.A second operating member 6 makes it possible to obtain the cumulative value of the illumination over a certain period of time between the time when the reset member 5 was actuated for the last time and the time when the totalizing member 6 is activated.
Un organe de manoeuvre supplémentaire 7 est également prévu. Il est destiné à l'allumage ou à l'extinction du dispositif d'affichage 4.An additional operating member 7 is also provided. It is intended for switching the display device 4 on or off.
Sur la figure 3 on peut distinguer d'une part un oscillateur 8 et d' autre part un totalisateur 14 auquel l'oscillateur 8 est relié.In FIG. 3 we can distinguish on the one hand an oscillator 8 and on the other hand a totalizer 14 to which the oscillator 8 is connected.
L'oscillateur 8 est alimenté par exemple par une petite pile et il contient une cellule photorésistante 9. Cette cellule 9 est reliée à une capacité de protection 1 1 et à un circuit intégré 10. L'oscillateur 8 comprend en outre deux résistances de réglage 12 et 13.The oscillator 8 is powered for example by a small battery and it contains a photoresist cell 9. This cell 9 is connected to a protection capacitor 1 1 and to an integrated circuit 10. The oscillator 8 further comprises two adjustment resistors 12 and 13.
Le circuit de l'oscillateur est conçu de telle sorte que la fréquence des signaux générés soit proportionelle à la quantité de lumière reçue par la cellule photorésistante.The oscillator circuit is designed so that the frequency of the signals generated is proportional to the amount of light received by the photoresist.
La lumière reçue est transformée par le capteur en une résistance équivalente.The light received is transformed by the sensor into an equivalent resistance.
On obtient une génération de signaux car- rés s à la sortie de l'oscillateur 8 qui est fonction de la quantité de lumière reçue par le capteur.A generation of square signals is obtained at the output of oscillator 8 which is a function of the amount of light received by the sensor.
Ces signaux carrés s sont ensuite dirigés vers une entrée du totalisateur 14 pour y être totalisés. Ils sont d'abord traités dans un circuit intégré 16 du totalisateur dont certaines sorties sont reliées en série à un dispositif d' af f ichage 4 par l'intermédiaire d'un canal 19.These square signals are then directed to an input of the totalizer 14 to be totaled there. They are first processed in an integrated circuit 16 of the totalizer, some outputs of which are connected in series to a display device 4 by through a channel 19.
Les entrées de ce dispositif d'affichage 4 sont raccordées à une cathode commune 18 dont une extrémité est en contact avec le canal 19. Ce canal 19 commande les segments des caractères d'affichage, tels que chiffres.The inputs of this display device 4 are connected to a common cathode 18, one end of which is in contact with the channel 19. This channel 19 controls the segments of the display characters, such as numbers.
L'autre extrémité de la cathode est reliée à un canal servant à commander l'activation des chiffres individuelle¬ ment.The other end of the cathode is connected to a channel used to control the activation of the figures individually.
En actionnant l'organe de manoeuvre 5 précité, on commande un contact 29 qui est relié au circuit intégré 16, par l'intermédiaire duquel la remise à zéro est effectuée.By actuating the above-mentioned operating member 5, a contact 29 is controlled which is connected to the integrated circuit 16, by means of which the reset is carried out.
En actionnant l'organe 6 précité, on commande un contact 30 qui est également relié au circuit intégré 16, par l' intermédiaire duquel la totalisation de l'éclairement est effectuée.By actuating the aforementioned member 6, a contact 30 is controlled which is also connected to the integrated circuit 16, by means of which the totalization of the illumination is carried out.
Ainsi, suivant la quantité de lumière reçue par la cellule photorésistante 9, on obtient une génération de signaux carrés s à la sortie de l'oscillateur 8 qui pénètre dans le totalisateur 14 par l'entrée 15 pour y être traitée par le circuit intégré 16 et y être transformée en signaux de commande des chiffres, qui affichent la quantité de lumière reçue. ExempleThus, depending on the amount of light received by the photoresist cell 9, a generation of square signals s is obtained at the output of the oscillator 8 which enters the totalizer 14 through the input 15 to be processed there by the integrated circuit 16 and be transformed there into digit control signals, which display the amount of light received. Example
L'oscillateur utilisé comprend les éléments suivants : une cellule photorésistante LDR 0,7, une capacité de protection de 10 μF, un circuit intégré NE 555 très précis, très stable et ne dépendant pas de la tension d'alimentation, deux résistances, celle reliée à la capacité, de 100 kΛ. et l'autre de 2,2 k-n_ .The oscillator used includes the following elements: a photoresist cell LDR 0.7, a protection capacity of 10 μF, an integrated circuit NE 555 very precise, very stable and not dependent on the supply voltage, two resistors, that connected to the capacity, 100 kΛ. and the other of 2.2 k-n_.
Grâce à l'appareil de mesure suivant l'in¬ vention, on obtient un petit appareil compact et maniable permettant de mesurer la quantité de lumière reçue pendant un certain laps de temps, par exemple un jour, un mois ou une année, et de totaliser cette quantité sur ce laps de temps.Thanks to the measuring device according to the invention, a small, compact and handy device is obtained making it possible to measure the quantity of light received over a certain period of time, for example a day, a month or a year, and total this quantity over this period of time.
Il est bien entendu que l'invention n'est nullement limitée à la forme de réalisation décrite ci-dessus et que, dans le cadre de la protection recherchée, des variantes peuvent être imaginées. It is understood that the invention is in no way limited to the embodiment described above and that, within the framework of the protection sought, variants can be imagined.

Claims

REVENDICATIONS
1 . Appareil de m esure de l' éclairem en t caractérisé en ce qu'il comprend un capteur optique (2) destiné à recueillir l'éclairement et un totalisateur ( 14) destiné à cumuler pendant une unité de temps l'éclairement recueilli par ledit capteur optique (2). 1. Apparatus for measuring the illumination in t characterized in that it comprises an optical sensor (2) intended to collect the illumination and a totalizer (14) intended to accumulate during a unit of time the illumination collected by said sensor optical (2).
2. Appareil de mesure suivant la revendication2. Measuring device according to claim
1, caractérisé en ce que le capteur optique (2) comprend une cellule photorésistante dont la résistance varie avec l'éclairement recueilli, ledit capteur (2) étant protégé par au moins un moyen de conversion (S) de rayonnement ultraviolet en rayonnement visible destiné à être dirigé sur la cellule photorésistante.1, characterized in that the optical sensor (2) comprises a photoresist cell whose resistance varies with the illumination collected, said sensor (2) being protected by at least one means (S) for converting ultraviolet radiation into visible radiation intended to be directed on the photoresist cell.
3. Appareil de mesure suivant la revendication3. Measuring device according to claim
2, caractérisé en ce que le moyen de conversion (S) est formé par une superposition d'au moins deux feuilles transparentes (25), (27) et d'une couche d'une poudre de sel (26) présentant des propriétés de fluorescence. ladite couche (26) étant comprise entre les deux feuilles(25), (27), de manière à obtenir ladite conversion.2, characterized in that the conversion means (S) is formed by a superposition of at least two transparent sheets (25), (27) and a layer of a salt powder (26) having properties of fluorescence. said layer (26) being between the two sheets (25), (27), so as to obtain said conversion.
4. Appareil de mesure suivant la revendication4. Measuring device according to claim
3, caractérisé en ce que la poudre de sel est constituée de 1 S à 22 ?ό de silicate de zinc, de 31 à 35 % de borate de cadmium et de 45 à 49 ?o de tungstate de magnésium.3, characterized in that the salt powder consists of 1 S to 22? Ό of zinc silicate, 31 to 35% of cadmium borate and 45 to 49? O of magnesium tungstate.
5. Appareil de mesure suivant l'une ou l'autre des revendication 3 et 4, caractérisé en ce que la poudre de sel est constituée de 20 % de silicate de zinc, de 33 % de borate de cadmium et de 47 % de tungstate de magnésium. 5. Measuring device according to either of Claims 3 and 4, characterized in that the salt powder consists of 20% zinc silicate, 33% of cadmium borate and 47% of tungstate magnesium.
6. Appareil de mesure suivant l'une quelconque des revendications 2 à 5, caractérisé en ce que la cellule photorésistante comprend un conducteur de sulfure de cadmium. 6. Measuring device according to any one of claims 2 to 5, characterized in that the photoresist cell comprises a conductor of cadmium sulfide.
PCT/BE1989/000038 1988-08-09 1989-08-08 Apparatus for measuring the illumination WO1990001685A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8800911 1988-08-09
BE8800911A BE1002351A6 (en) 1988-08-09 1988-08-09 LIGHTING MEASURING APPARATUS.

Publications (1)

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WO1990001685A1 true WO1990001685A1 (en) 1990-02-22

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BE (1) BE1002351A6 (en)
WO (1) WO1990001685A1 (en)

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WO2005062009A1 (en) 2003-12-04 2005-07-07 Raytheon Company Method and apparatus for detecting radiation at one wavelength using a detector for a different wavelength

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Publication number Priority date Publication date Assignee Title
FR1524183A (en) * 1967-02-24 1968-05-10 Device for measuring the intensity or energy of ultra-violet radiation
GB1137756A (en) * 1965-07-02 1968-12-27 Bull & Roberts Inc Improvements in radiation detector
US3710115A (en) * 1969-08-04 1973-01-09 J Jubb Sunburn warning device comprising detecting the ultra-violet component of solar radiation
GB2034462A (en) * 1978-10-30 1980-06-04 Elder Co P Ultraviolet radiation monitor
WO1986003319A1 (en) * 1984-11-26 1986-06-05 Diagnostic Instruments Pty. Ltd. Ultraviolet radiation monitoring device
US4704535A (en) * 1985-04-11 1987-11-03 Teledyne Industries, Inc. Ultraviolet dosimetry

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Publication number Priority date Publication date Assignee Title
GB1137756A (en) * 1965-07-02 1968-12-27 Bull & Roberts Inc Improvements in radiation detector
FR1524183A (en) * 1967-02-24 1968-05-10 Device for measuring the intensity or energy of ultra-violet radiation
US3710115A (en) * 1969-08-04 1973-01-09 J Jubb Sunburn warning device comprising detecting the ultra-violet component of solar radiation
GB2034462A (en) * 1978-10-30 1980-06-04 Elder Co P Ultraviolet radiation monitor
WO1986003319A1 (en) * 1984-11-26 1986-06-05 Diagnostic Instruments Pty. Ltd. Ultraviolet radiation monitoring device
US4704535A (en) * 1985-04-11 1987-11-03 Teledyne Industries, Inc. Ultraviolet dosimetry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005062009A1 (en) 2003-12-04 2005-07-07 Raytheon Company Method and apparatus for detecting radiation at one wavelength using a detector for a different wavelength
US7038623B2 (en) 2003-12-04 2006-05-02 Raytheon Company Method and apparatus for detecting radiation at one wavelength using a detector for a different wavelength

Also Published As

Publication number Publication date
EP0393167A1 (en) 1990-10-24
BE1002351A6 (en) 1991-01-08

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