Apparatus and method for enhancing the response of a...

Details Apparatus and method for enhancing the response of a... Apparatus and method for enhancing the response of a...

G - Physics

01

N

G01N 21/00 (2006.01) G01D 1/10 (2006.01) G01D 1/16 (2006.01) G01N 21/78 (2006.01) G08B 21/00 (2006.01)

Patent

CA 2199600

The present invention provides an apparatus and method for enhancing the response of a biometric sensor for sensing toxins by measuring the rate of change of sensor readings. An LED, optically coupled to the sensor and a photodiode, transmits light through the sensor to the photodiode. The photocurrent from the photodiode is converted to a digital sensor reading value proportional to the darkness of the sensor and is loaded into a microprocessor. In the microprocessor, the sensor readings are essentially differentiated to determine the rate of change of the sensor readings. The rate of change information is used to trigger an alarm condition indicative of a predetermined level of sensed toxins.

La présente invention concerne un appareil et un procédé pour améliorer la réponse d'un détecteur biomimétique (12) permettant la détection de toxines en mesurant la vitesse de changement de la lecture du détecteur. Une diode à luminescence (10) couplée optiquement avec le détecteur (12) et une photodiode (14), transmet la lumière par le détecteur (12) à la photodiode (14). Le courant photoélectrique de la photodiode est converti en une valeur de lecture numérique du détecteur qui est proportionnelle à l'intensité de la teinte foncée du détecteur (12) et il est chargé dans le microprocesseur (8) pour une analyse complémentaire.

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