Resources Contact Us Home
Gas sensor

Image Number 3 for United States Patent #8117894.

A sensor system issues measurement commands at a predetermined regular rate. If a measurement indicates that a gas of interest is present, then the sensor system is signaled to wake-up thereby pulsing a heater for the sensor element that improves the accuracy of measurements. Measurements of humidity, temperature and gas concentration are made. If the gas of interest is detected then the data is used to indicate a compensated gas measurement. The gas level is classified as to its hazard and an adaptive detection algorithm is used to set an activity mode. If the gas of interest is not detected, the adaptive detection algorithm is used to set a sleep mode that saves power. Measurement rates are kept constant while heater power is controlled to reduce power consumption. Measurement rates are changed to increase concentration sensitivity.

  Recently Added Patents
Wireless communication method, wireless communication system, and mode switching method
Nonaqueous secondary battery with nitrile group-containing compound
Variable delay line for delay locked loop
Dispensing of restricted goods
Lubricating oil with enhanced protection against wear and corrosion
Multi-level integrated circuit, device and method for modeling multi-level integrated circuits
Internal wiring structure of semiconductor device
  Randomly Featured Patents
Method for metering a reagent into an exhaust gas duct and device for carrying out the method
Method of treating a metal surface to increase polymer adhesion
Stator core assembly
Terminal, semiconductor device, terminal forming method and flip chip semiconductor device manufacturing method
Method for manufacturing olefinic thermoplastic elastomer composition
Torsional vibration damper
Lens hood
Automatic portable pH meter and method with calibration receptacle
Deceleration apparatus for safety nets
Playing data from an optical media drive