Abstract:
A printed circuit device used in conjunction with inductive power and data transmission applications is formed substantially of ferrite material, with an inductive coil conductor formed around the substrate to increase the electromagnetic properties of the coil for both power and data transmission functions, thereby eliminating the need for a discrete ferrite core wire-wound coil to be connected to the circuit device.
Abstract:
The present invention provides systems and methods for attenuating the effect of ambient light on optical sensors and for measuring and compensating quantitatively for the ambient light.
Abstract:
A device (20) determines an optical intensity of light emanating from a sample (22) situated under periodically varying ambient light (34). The device (20) includes a selectively illuminating light source (26a, 26b) that can be switched between on and off states that illuminates the sample (22). A detector (36) detects the optical intensities of the sample (22) a first plurality of times with the effects of the illuminating light source (26a, 26b) to produce a plurality of collective light intensity measurements, and a second plurality of times without the effects of the light source (26a, 26b) to produce a plurality of ambient light intensity measurements. A processor quantitatively determines, based upon the multiple collective intensity measurements and the multiple ambient light intensity measurements, the intensity amount of each of the collective light intensity measurements that results from the illuminating source (26a, 26b).
Abstract:
L'invention concerne un procédé et un dispositif pour déterminer un signal lumineux additif à de la lumière solaire. Le dispositif selon l'invention comprend des moyens (2) pour collecter de lumière en provenance d'un objet, la lumière collectée comprenant de la lumière solaire réfléchie (5) par l'objet (4), et un signal lumineux additif (6); des moyens pour mesurer (10, 15, 17), pour au moins une première et une deuxième raie d'absorption atmosphérique, un signal qui dépend d'une intensité de la lumière collectée à une longueur d'onde de la raie; des moyens (11) pour déterminer, à partir des signaux mesurés, un signal qui dépend d'une intensité du signal additif à une longueur d'onde de la première raie. L'invention concerne aussi un procédé mis en œuvre dans un dispositif selon l'invention. Le dispositif ou le procédé selon l'invention ne nécessite pas de mesure sur de la lumière solaire de référence dénuée de signal additif au voisinage de la première raie. Application plus particulièrement à la mesure d'un signal de fluorescence émis par de la végétation.
Abstract:
A system (1) for disabling an oximetric device when radiation-carrying channels (10, 12, 14) are exposed to excess ambient radiation is disclosed. It includes a transmitter channel (18) adjacent the sample to be measured, means (54) for isolating the channel from the sample so that it does not carry radiation reflected from or transmitted through the sample, a detector (262) for receiving the transmitted signal, if any, and means for disabling the output in response to the transmitted signal. Preferably, the transmitter channel (18) runs parallel to other transmitter channels (10, 12, 14) in the device, and is isolated from undue ambient light. The system preferably includes means for determining when the second transmitted signal exceeds background noise and the output is disabled when the second transmitted signal exceeds background noise. In general, the sample is a fluid, usually blood, passing through a cuvette (7) adjacent the fiber-optic channels, a cuvette (7) defining an area (52) of radiation absorption adjacent the transmitter channel so that the transmitter does not carry reflected or transmitted radiation from the sample. Also disclosed is a fiber-optic sensor (1) for measuring components of a composition by detecting transmitted or reflected, usually reflected, radiation including such a system, and the cuvette (7) therefor. Finally, a method of disabling the output of an oximetric device (1) when the fiber-optic channels (10, 12, 14) are exposed to undue ambient radiation is disclosed.
Abstract:
Die Erfindung betrifft ein System zum Erfassen elektromagnetischer Strahlung mit einem Sensor, mit einer Auswerteeinheit, die mit dem Sensor verbunden ist, wobei der Sensor die elektromagnetische Strahlung erfasst und an die Auswerteeinheit weiter leitet, die mit einem Erkennungsmittel verbunden ist, wobei das Erkennungsmittel einen Signalanteil der elektromagnetischen Strahlung, der eine festgelegte Wiederholfrequenz aufweist, aus der vom Sensor erfassten elektromagnetischen Strahlung als Störsignal erkennt und gegebenenfalls aus der erfassten Strahlung entfernt.
Abstract:
The invention relates to a method and a device for determining a light signal additive to sunlight. The device according to the invention comprises: means (2) for collecting light coming from an object, the collected light comprising solar light (5) reflected by the object (4) and an additive light signal (6); means (10, 15, 17) for measuring, for at least first and second atmospheric absorption lines, a signal that depends on the intensity of the collected light at a wavelength of the line; means (11) for determining, from the measured signals, a signal that depends on an intensity of the additive signal at a wavelength of the first line. The invention also relates to a method employed in a device according to the invention. The device or the method according to the invention does not require measurement on reference sunlight without the additive signal close to the first line. Application more particularly to the measurement of a fluorescence signal emitted by vegetation.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved implantable sensor device.SOLUTION: A printed circuit board used in conjunction with inductive power and data transmission applications is formed substantially of ferrite material. An inductive coil conductor material formed around the board increases electromagnetic properties of the coil for both of a power source function and a data transmission function, thereby eliminating the need for a discrete ferrite core wire-wound coil to be connected to a circuit device.
Abstract:
The present invention provides systems and methods for attenuating the effect of ambient light on optical sensors and for measuring and compensating quantitatively for the ambient light.