Method for enhancing the response of a biomimetic sensor

Details Method for enhancing the response of a biomimetic sensor Method for enhancing the response of a biomimetic sensor

1994-09-09

1996-11-12

Alexander, Lyle A.

Chemistry: analytical and immunological testing

Optical result

436169, 422 91, 422 8205, G01N 2101

Patent

active

055739539

ABSTRACT:
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.

REFERENCES:
patent: 4464653 (1984-08-01), Winner
patent: 5063164 (1991-11-01), Goldstein

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