ES2342757A1 - Apparatus for measuring the optical properties of water samples - Google Patents
Apparatus for measuring the optical properties of water samples Download PDFInfo
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- ES2342757A1 ES2342757A1 ES200803488A ES200803488A ES2342757A1 ES 2342757 A1 ES2342757 A1 ES 2342757A1 ES 200803488 A ES200803488 A ES 200803488A ES 200803488 A ES200803488 A ES 200803488A ES 2342757 A1 ES2342757 A1 ES 2342757A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6486—Measuring fluorescence of biological material, e.g. DNA, RNA, cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N21/8507—Probe photometers, i.e. with optical measuring part dipped into fluid sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
Abstract
Description
Aparato para medir propiedades ópticas de muestras de agua.Apparatus for measuring optical properties of Water samples.
La presente invención se refiere a un aparato para medir propiedades ópticas de muestras de agua en zonas acuáticas a distintas profundidades y, particularmente, a un aparato para medir la absorbancia, la fluorescencia y la turbidez.The present invention relates to an apparatus to measure optical properties of water samples in areas aquatic at different depths and, particularly, to an apparatus to measure absorbance, fluorescence and turbidity.
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En la técnica anterior son conocidos distintos tipos de aparatos para medir propiedades relevantes para analizar la calidad de las aguas.In the prior art different are known types of devices to measure relevant properties to analyze the water quality
El documento de patente WO 03/067021 describe un dispositivo multi-paramétrico, fácilmente reconfigurable, para determinar la calidad del agua, constituido por una sonda especialmente configurada para alojar e interconectar diferentes componentes que pueden ser sensores (pasivos: temperatura, activos: presión, conductividad, oxígeno disuelto, turbidez, o por detección química: selección por iones) y accesorios (dispositivos de limpieza...). El dispositivo incluye un sistema electrónico con un procesador y una memoria con instrucciones almacenadas para facilitar su operación autónoma del conjunto. El dispositivo está configurado para interconectarse con otros sistemas remotos mediante una red de datos.Patent document WO 03/067021 describes a multi-parametric device, easily reconfigurable, to determine water quality, consisting of a probe specially configured to house and interconnect different components that can be sensors (passive: temperature, active: pressure, conductivity, dissolved oxygen, turbidity, or by chemical detection: ion selection) and accessories (cleaning devices ...). The device includes a system electronic with a processor and a memory with instructions stored to facilitate its autonomous operation of the whole. He device is configured to interface with other systems remote through a data network.
El documento de patente ES 2199087 describe un sistema de vigilancia y control del agua que comprende un centro de control conectado a través de una red de comunicaciones con una pluralidad de estaciones remotas fijas y/o móviles que realizan medidas de calidad según diferentes parámetros (temperatura, salinidad, pH, presión atmosférica, potencial Redox, contaminación orgánica, turbidez, oxígeno disuelto en el agua y conductividad). Los sensores de medida están duplicados, comprendiendo además medios de lavado y regeneración, alternándose cíclicamente los grupos de sensores para la obtención de datos. Las estaciones móviles incorporan un módulo localizador de posición.Patent document ES 2199087 describes a water monitoring and control system comprising a center for control connected through a communications network with a plurality of fixed and / or mobile remote stations that perform quality measures according to different parameters (temperature, salinity, pH, atmospheric pressure, redox potential, pollution organic, turbidity, dissolved oxygen in water and conductivity). The measurement sensors are duplicated, also comprising means washing and regeneration, cyclically alternating groups of sensors for obtaining data. Mobile stations They incorporate a position locator module.
El documento de patente US 5,905,570 describe un sistema mejorado (REOS-3) de supervisión de la calidad del agua de consumo. Está diseñado para monitorizar de forma continua la proliferación dañina de algas para evitar que aparezcan problemas en el olor, gusto o apariencia. Proporciona valores sobre la concentración de la clorofila, turbidez equivalente, coeficientes de atenuación espectral de la luz y medidas de la reflectancia. El sistema, autónomo, incluye funciones de almacenamiento en bases de datos comunicaciones de datos remotas.US Patent 5,905,570 describes a Enhanced system (REOS-3) for monitoring the drinking water quality It is designed to monitor so continued harmful algal blooms to prevent them from appearing Problems in smell, taste or appearance. Provide values about Chlorophyll concentration, equivalent turbidity, coefficients of light spectral attenuation and reflectance measurements. He system, autonomous, includes storage functions in bases of Data remote data communications.
Ninguno de los aparatos conocidos aborda satisfactoriamente la problemática planteada por la medición de las propiedades ópticas de las muestras de agua. La presente invención está orientada a la solución de ese inconveniente.None of the known devices addresses satisfactorily the problem posed by the measurement of optical properties of water samples. The present invention It is aimed at solving that problem.
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Un objeto de la presente invención es proporcionar un aparato para la medición de propiedades ópticas relevantes de muestras de agua en una determinada zona acuática para analizar la calidad del agua y, en particular, para la medición de la absorbancia, la fluorescencia y la turbidez, con objeto de discriminar entre diferentes clases de fitoplancton.An object of the present invention is provide an apparatus for measuring optical properties relevant water samples in a given aquatic area to analyze water quality and, in particular, for the measurement of absorbance, fluorescence and turbidity, in order to discriminate between different kinds of phytoplankton.
Ese y otros objetos se consiguen mediante un aparato para la medición de propiedades ópticas de muestras de agua en una determinada zona acuática que comprende una sonda sumergible y un equipo de monitorización situado en la superficie, conectados por cable o radio, en el que:That and other objects are achieved through a apparatus for measuring optical properties of water samples in a certain aquatic area comprising a submersible probe and a monitoring equipment located on the surface, connected by cable or radio, in which:
- Dicha sonda comprende unos sensores de medición de dichas propiedades ópticas y unos grupos de elementos emisores de luz afectados a cada uno de dichos sensores, dispuestos de manera que entre emisores y sensores se establezca un camino óptico a través de las muestras de agua, y un controlador con medios para llevar a cabo una activación secuencial de cada uno de los elementos emisores de luz del grupo afectado a cada uno de dichos sensores.- Said probe comprises sensors of measurement of said optical properties and groups of elements light emitters affected to each of said sensors, arranged so that a path is established between emitters and sensors optical through water samples, and a media controller to carry out a sequential activation of each of the light emitting elements of the group affected to each of said sensors
- Dicha sonda también comprende un sensor de presión.- Said probe also comprises a sensor of Pressure.
- Dicho equipo de monitorización comprende medios para recibir de dicha sonda datos de las mediciones efectuadas por los sensores en dicha zona acuática así como medios de visualización y almacenamiento de dichos datos.- Said monitoring equipment comprises means for receiving measurement data from said probe made by the sensors in said aquatic zone as well as means of visualization and storage of said data.
En una realización preferente de la presente invención, una de las propiedades ópticas medidas es la absorbancia de la muestra de agua de la luz emitida por los varios emisores de luz a diferentes longitudes de onda. Se consigue con ello obtener unos datos particularmente relevantes para el análisis de la calidad del agua.In a preferred embodiment of the present invention, one of the measured optical properties is absorbance of the water sample of the light emitted by the various emitters of light at different wavelengths. You get with it get Particularly relevant data for quality analysis of the water.
En otra realización preferente de la presente invención, una de las propiedades ópticas medidas es fluorescencia de la muestra de agua a una longitud de onda predeterminada para la luz emitida por varios emisores de luz a diferentes longitudes de onda Se consigue con ello obtener unos datos. particularmente relevantes para el análisis de la calidad del agua.In another preferred embodiment of the present invention, one of the optical properties measured is fluorescence of the water sample at a predetermined wavelength for the light emitted by several light emitters at different lengths of wave It is possible to obtain some data. particularly relevant for the analysis of water quality.
Otras características y ventajas de la presente invención se desprenderán de la descripción detallada que sigue de una realización ilustrativa de su objeto en relación con las figuras que le acompañan.Other features and advantages of this invention will follow from the detailed description that follows from an illustrative embodiment of its object in relation to the figures that accompany him.
La Figura 1 es una vista esquemática del aparato objeto de la presente invención.Figure 1 is a schematic view of the apparatus object of the present invention.
La Figuras 2 es una vista esquemática en perspectiva de un realización preferente de la sonda del aparato objeto de la presente invención.Figures 2 is a schematic view in perspective of a preferred embodiment of the apparatus probe object of the present invention.
La Figura 3 es una vista esquemática de la disposición de los elementos emisores de luz y los sensores en la sonda del aparato objeto de la presente invención.Figure 3 is a schematic view of the arrangement of light emitting elements and sensors in the probe of the apparatus object of the present invention.
La Figura 4 ilustra la manera en la que se mide la fluorescencia en la sonda del aparato objeto de la presente invención.Figure 4 illustrates the way in which it is measured the fluorescence in the probe of the apparatus object of the present invention.
En la realización preferente ilustrada en las Figuras el aparato para la medición de propiedades ópticas de muestras de agua en una determinada zona acuática según la presente invención consta de una sonda 11 y un equipo de monitorización 13 conectados por radio, aunque la invención también comprende la conexión por cable.In the preferred embodiment illustrated in the Figures the device for measuring optical properties of water samples in a certain aquatic area according to the present invention consists of a probe 11 and a monitoring device 13 connected by radio, although the invention also comprises the wired connection.
La sonda 11 comprende un conjunto de componentes albergados en un contenedor 41 que está estructurado en tres cuerpos: un cuerpo superior 43 que alberga el sistema electrónico, un cuerpo central 45 y un cuerpo inferior 47.The probe 11 comprises a set of components housed in a container 41 that is structured in three bodies: an upper body 43 that houses the electronic system, a central body 45 and a lower body 47.
El cuerpo central 45 incluye un bloque 51 donde se sitúan los elementos emisores de luz 31, 33, 35 y dos bloques 53, 55 donde se sitúan los sensores de medición de la absorbancia 21, la fluorescencia 23 y la turbidez 25. El bloque 53 contiene los sensores 23, 25 situados a 90º en relación a los elementos; emisores y el bloque 55 los sensores 21, 25 situados a 0º en relación a los elementos emisores. También incluye un armazón formado por dos discos de soporte 61, 65 de los bloques 51, 55 y un disco intermedio 63, que soporte el bloque 53 y unas barras periféricas 67 que delimitan y protegen el espacio ocupado por la muestra de agua en la que se efectúan las mediciones. El cuerpo inferior 47 permite la libre circulación (entrada-salida) del agua a analizar.The central body 45 includes a block 51 where the light emitting elements 31, 33, 35 and two blocks 53 are placed, 55 where the absorbance measurement sensors 21 are located, the fluorescence 23 and turbidity 25. Block 53 contains the sensors 23, 25 located at 90 ° in relation to the elements; emitters and block 55 the sensors 21, 25 located at 0 ° in relation to the emitting elements It also includes a frame consisting of two support discs 61, 65 of blocks 51, 55 and a disk intermediate 63, which supports block 53 and peripheral bars 67 that delimit and protect the space occupied by the water sample in which measurements are made. The lower body 47 allows the free circulation (inlet-outlet) of water to analyze.
En la Figura 3 se muestran esquemáticamente los distintos elementos emisores 31, 33, 35 situados en la cara frontal del bloque 51, los sensores 21, 25 de medición de la absorbancia y la turbidez en la cara frontal del bloque 55 quedando pues situados a 0º en relación con los elementos emisores 31, 35 afectados a ellos y los sensores 23, 25 de medición de la fluorescencia y la turbidez en el bloque 53, quedando pues situados a 90º en relación con los elementos emisores 33, 35 afectados a ellos.Figure 3 shows schematically the different emitting elements 31, 33, 35 located on the front face of block 51, the absorbance measurement sensors 21, 25 and the turbidity on the front face of block 55 being therefore located at 0º in relation to the emitting elements 31, 35 affected to them and sensors 23, 25 for measuring fluorescence and turbidity in block 53, being therefore located at 90º in relation to the emitting elements 33, 35 affected to them.
La distancia D entre las caras enfrentadas de los bloques 51 y 55 es pues, la longitud del camino óptico entre los elementos emisores y receptores para la medición de la absorbancia que debe ser pues conocida y tenida en cuenta para los análisis de resultados posteriores. Se considera que en una realización preferente de la invención D está comprendida entre 5 y 20 cm. El bloque 53 se sitúa aproximadamente a la mitad de la distancia D entre los bloques 51 y 55.The distance D between the facing faces of blocks 51 and 55 is thus the length of the optical path between the emitting and receiving elements for absorbance measurement which must therefore be known and taken into account for the analysis of subsequent results. It is considered that in one embodiment Preferred of the invention D is between 5 and 20 cm. He block 53 is approximately half the distance D between blocks 51 and 55.
La sonda 11 comprende los siguientes componentes:The probe 11 comprises the following components:
- Un grupo de siete diodos LED's 31 como elementos emisores de luz en distintas bandas espectrales afectados a un sensor de absorbancia 21. En la realización que estamos describiendo se utilizan los siguientes diodos LED's: HUVL370-510 a 375 nm, FNL-U501B06WCSL a 428 nm, E1L31-AG0A-02 a 530 nm, HLMP-C515 a 568 nm, MV8716 a 620 nm, MARL-110069 a 660 nm y L-53HD a 700 nm, como elementos emisores de luz y el fotodiodo SFH203P como sensor de absorbancia 21.- A group of seven LEDs 31 as light emitting elements in different affected spectral bands to an absorbance sensor 21. In the embodiment that we are describing the following LED's are used: HUVL370-510 at 375 nm, FNL-U501B06WCSL at 428 nm, E1L31-AG0A-02 at 530 nm, HLMP-C515 at 568 nm, MV8716 at 620 nm, MARL-110069 at 660 nm and L-53HD at 700 nm, as light emitting elements and the SFH203P photodiode as absorbance sensor 21.
- Un grupo de cinco diodos LED's 33 como elementos emisores de luz en distintas bandas espectrales afectados a un sensor de fluorescencia 23. En la realización que estamos describiendo se utilizan los siguientes diodos LED's: HUVL370-510 a 375 nm, FNL-U501B06WCSL a 428 nm, E1L31-AG0A-02 a 530 nm, HLMP-C515 a 568 nm y MV8716 a 620 nm, como elementos emisores de luz y el fotodiodo EPD-660-5/0.5 a 90º como sensor de fluorescencia 23 captando la radiación a 660 nm emitida por partículas en suspensión en la muestra de agua.- A group of five LED's 33 diodes as light emitting elements in different affected spectral bands to a fluorescence sensor 23. In the embodiment that we are describing the following LED's are used: HUVL370-510 at 375 nm, FNL-U501B06WCSL at 428 nm, E1L31-AG0A-02 at 530 nm, HLMP-C515 at 568 nm and MV8716 at 620 nm, as elements light emitters and photodiode EPD-660-5 / 0.5 at 90º as sensor fluorescence 23 capturing the radiation at 660 nm emitted by suspended particles in the water sample.
- Un diodo LED 35 como elemento emisor de luz infrarroja afectado a dos sensores de turbidez 25 a 0º y 90º de los que el primero capta la radiación que atraviesa la muestra de agua y el segundo la radiación dispersada por las partículas en suspensión. En la realización que estamos describiendo se utiliza el diodo LED OPE5685 a 850 nm como elemento emisor de luz y los fotodiodos SFH203PFA (0º) y SFH203 PFA (90º) como sensores de turbidez 25.- A LED 35 as a light emitting element infrared affected two turbidity sensors 25 to 0º and 90º of the that the first captures the radiation that passes through the water sample and the second the radiation dispersed by the particles in suspension. In the embodiment we are describing, the LED diode OPE5685 at 850 nm as a light emitting element and the SFH203PFA photodiodes (0º) and SFH203 PFA (90º) as sensors turbidity 25.
- Un sensor de temperatura. En la realización que estamos describiendo se utiliza el circuito integrado LM35 que proporciona una resolución de 10 mV/ºC y un rango de medida de 2 a 150ºC. Como encapsulado se ha elegido el tipo TO-45 que proporciona mayor rigidez y mejor conductividad térmica. El aislamiento con el medio se consigue mediante el sellado con una capa de silicona.- A temperature sensor. In the realization that we are describing is used the integrated circuit LM35 that provides a resolution of 10 mV / ºC and a measuring range of 2 to 150 ° C The encapsulation type TO-45 has been chosen It provides greater rigidity and better thermal conductivity. He insulation with the medium is achieved by sealing with a silicone layer
- Un sensor de presión. En la realización que estamos describiendo se utiliza el sensor 19C030PA7K de Sensym ICT que proporciona un intervalo de medida entre 0 y 30 psi. El dato de presión se utiliza para identificar la profundidad a la que se encuentra la sonda 11.- A pressure sensor. In the realization that we are describing the sensor 19C030PA7K from Sensym ICT is used which provides a measurement range between 0 and 30 psi. The data of pressure is used to identify the depth at which it find the probe 11.
- Un sistema electrónico para la captura de las señales procedentes de los fotodiodos 21, 23, 25 y los sensores de presión y temperatura y las transmisión de la información al equipo de monitorización 13. En la realización que estamos describiendo el sistema incluye conversores corriente-tensión para los fotodiodos 21, 23, 25, circuitos de excitación de los diodos LED's 31, 33, 35, circuitos de adaptación para los sensores de presión y temperatura y un microcontrolador PIC16F876 de microchip con un circuito para establecer la tensión de referencia de los convertidores internos a 2 V (ajustable) y un convertidor serie-RS485 para la comunicación con la unidad de transmisión y un oscilador a cristal de 4 MHz como señal de reloj. Las señales procedentes de los sensores de presión, temperatura y de los fotodiodos 21, 23, 25 son capturadas por el microcontrolador, el cual controla el sistema de sensores, el encendido de los diferentes LED's y la transmisión de la información a la unidad de monitorización 13. Como circuito de comunicación por radio se utiliza el circuito integrado RF600T que proporciona la intercomunicación entre la salida serie del microcontrolador y el radioenlace. En el caso de comunicación por cable se utiliza la transmisión serie vía RS485.- An electronic system for capturing signals from photodiodes 21, 23, 25 and sensors pressure and temperature and the transmission of information to the equipment of monitoring 13. In the embodiment we are describing the system includes current-voltage converters for photodiodes 21, 23, 25, diode excitation circuits LED's 31, 33, 35, adaptive circuits for the sensors pressure and temperature and a microchip PIC16F876 microcontroller with a circuit to establish the reference voltage of the 2V internal converters (adjustable) and a converter RS485 series for communication with the unit transmission and a 4 MHz crystal oscillator as a clock signal. The signals from the pressure, temperature and photodiodes 21, 23, 25 are captured by the microcontroller, the which controls the sensor system, the ignition of the different LED's and the transmission of information to the unit of monitoring 13. As a radio communication circuit, uses the RF600T integrated circuit that provides the intercom between the serial output of the microcontroller and the radio link. In the case of cable communication the serial transmission via RS485.
Utilizando el microcontrolador mencionado, las mediciones de las variables mencionadas se llevan a cabo como sigue:Using the microcontroller mentioned, the Measurements of the aforementioned variables are carried out as follow:
En primer lugar se realiza el encendido secuencial de los LED's 31 para la medida de la absorbancia, esperando a la estabilización de la medida. Los valores obtenidos son almacenados en variables del sistema.First the ignition is done sequential of the LED's 31 for absorbance measurement, Waiting for the stabilization of the measure. The values obtained They are stored in system variables.
El segundo paso consiste en la medida de fluorescencia. La secuencia de medida se muestra en La Figura 4. Para cada uno de los LED's 33 se realiza una medida inicial en t1, se activa el LED y se realiza una medida de la fluorescencia cuando se estabiliza (t2). Una vez realizada esta medida, se espera a la recuperación en t3 antes de proceder al encendido del LED siguiente. Con esto se consigue eliminar las posibles interferencias de luz ambiente, ya que se compensa con la medida inicial.The second step consists in the measurement of fluorescence. The measurement sequence is shown in Figure 4. For each of the LED's 33 an initial measurement is made in t1, the LED is activated and a fluorescence measurement is performed when it stabilizes (t2). Once this measure has been completed, the recovery in t3 before switching on the next LED. This eliminates possible light interference. environment, as it is compensated with the initial measurement.
Por último se realiza la medida de la turbidez, activando el LED 35 emisor de infrarrojos y almacenando la medida estable de los receptores correspondientes 25 situados a 0º y 90º del emisor.Finally the turbidity measurement is carried out, activating the infrared emitting LED 35 and storing the measurement stable of the corresponding receptors 25 located at 0º and 90º of the issuer.
Finalmente, el equipo de monitorización 13 está compuesto por un ordenador portátil que recibe la información de la sonda sumergida mediante un circuito RF600T que convierte la señal radioeléctrica a RS232 que dispone de un software para procesar los datos recibidos de la sonda 11. O bien mediante un conversor RS485 a RS232/USB en el caso de comunicación por cable. Uno de los procesos relevantes al respecto es un análisis estadístico que permite determinar el contenido fitoplanctónico de la muestra de agua analizada.Finally, the monitoring equipment 13 is composed of a laptop that receives information from the probe submerged by an RF600T circuit that converts the signal radio to RS232 that has software to process the data received from probe 11. Or via an RS485 converter to RS232 / USB in the case of cable communication. One of the processes relevant in this regard is a statistical analysis that allows determine the phytoplankton content of the water sample analyzed.
En la realización preferente que acabamos de describir pueden introducirse aquellas modificaciones comprendidas dentro del alcance definido por las siguientes reivindicaciones.In the preferred embodiment we have just describe those modifications included within the scope defined by the following claims.
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200803488A ES2342757B1 (en) | 2008-12-01 | 2008-12-01 | APPARATUS FOR MEASURING OPTICAL PROPERTIES OF WATER SAMPLES. |
| PCT/ES2009/000552 WO2010063856A1 (en) | 2008-12-01 | 2009-11-30 | Apparatus for measuring the optical properties of water samples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200803488A ES2342757B1 (en) | 2008-12-01 | 2008-12-01 | APPARATUS FOR MEASURING OPTICAL PROPERTIES OF WATER SAMPLES. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2342757A1 true ES2342757A1 (en) | 2010-07-13 |
| ES2342757B1 ES2342757B1 (en) | 2011-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200803488A Active ES2342757B1 (en) | 2008-12-01 | 2008-12-01 | APPARATUS FOR MEASURING OPTICAL PROPERTIES OF WATER SAMPLES. |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES2342757B1 (en) |
| WO (1) | WO2010063856A1 (en) |
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| EP3662256A4 (en) * | 2017-08-03 | 2020-08-12 | Bahçesehir Üniversitesi | An underwater analysis device for analyzing absorption capacity of water |
| EP4010668A4 (en) * | 2019-08-06 | 2023-08-23 | Real Tech Holdings Inc. | Apparatus for measuring multi-wavelength transmittance using learned led temperature compensation model |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2972260B1 (en) | 2011-03-04 | 2014-02-21 | Centre Nat Rech Scient | SUBMERSIBLE FLUORIMETER |
| US9776693B2 (en) | 2013-03-15 | 2017-10-03 | Hadal, Inc. | Systems and methods for improving buoyancy in underwater vehicles |
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| EP4010668A4 (en) * | 2019-08-06 | 2023-08-23 | Real Tech Holdings Inc. | Apparatus for measuring multi-wavelength transmittance using learned led temperature compensation model |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010063856A1 (en) | 2010-06-10 |
| ES2342757B1 (en) | 2011-06-01 |
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