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Method for distributed chemical sensing using integrated devices in cell phones

IP.com Disclosure Number: IPCOM000033149D
Publication Date: 2004-Nov-29
Document File: 3 page(s) / 38K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for distributed chemical sensing using integrated devices in cell phones. Benefits include improved functionality and improved performance.

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Method for distributed chemical sensing using integrated devices in cell phones

Disclosed is a method for distributed chemical sensing using integrated devices in cell phones. Benefits include improved functionality and improved performance.

Background

              Ongoing research focuses on the use of arrays or collections of chemical sensors to improve the reliability of the data collected. Chemical sensors are known to require ongoing calibration because the gain and offsets of these devices change over time. Additionally, these sensors have a high failure rate. As a result, using multiple low-cost sensors and leveraging the aggregation and relative differences among these multiple sensors in known relative locations is most effective for resolving the most accurate measurement.

              Some research focuses on the development of micro electro-mechanical systems (MEMS) sensors that detect chemical agents identified as potential substances to be used in terrorist threats. The cellular infrastructure could enable the communication of the sensor data and feedback via a central processing station to continually calibrate the sensors.

              A high concentration of cell phones occurs where high concentrations of people occur. Taking advantage of this situation eliminates the risk and expense of establishing stationary sensor arrays in the vicinity of misidentified terrorist targets. However, some significant technical and business challenges must be overcome to include chemical sensors in cell phones. The cost of the sensors must be acceptable, such as with MEMS. An appropriate packaging and case design must be created to enable sensor operation. Some thermal issues must be resolved. The sensors may require a specific operating  temperature or may operate differently according to the temperature.

              The Wireless Enhanced 911 Services provides a possible infrastructure for the implementation of a network of chemical sensors. 

              Chemical sensors benefit from a multi-sensor approach due to the failure rate of single sensors.

              Conventional methods for detecting chemical threats involve the placement of numerous stationary sensors in target areas, such as subways.

Description

              The disclosed method is the integrat...