Invention Application
- Patent Title: System and method for variable threshold sensor
- Patent Title (中): 可变阈值传感器的系统和方法
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Application No.: US11145880Application Date: 2005-06-06
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Publication No.: US20060273896A1Publication Date: 2006-12-07
- Inventor: Lawrence Kates
- Applicant: Lawrence Kates
- Main IPC: G08B1/08
- IPC: G08B1/08

Abstract:
A sensor system that provides an adjustable threshold level for the sensed quantity is described. The adjustable threshold allows the sensor to adjust to ambient conditions, aging of components, and other operational variations while still providing a relatively sensitive detection capability for hazardous conditions. The adjustable threshold sensor can operate for extended periods without maintenance or recalibration. In one embodiment, the sensor is self-calibrating and runs through a calibration sequence at startup or at periodic intervals. In one embodiment, the adjustable threshold sensor is used in an intelligent sensor system that includes one or more intelligent sensor units and a base unit that can communicate with the sensor units. When one or more of the sensor units detects an anomalous condition (e.g., smoke, fire, water, etc.) the sensor unit communicates with the base unit and provides data regarding the anomalous condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet (and/or local area network), etc. In one embodiment, one or more wireless repeaters are used between the sensor units and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.
Public/Granted literature
- US07336168B2 System and method for variable threshold sensor Public/Granted day:2008-02-26
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