Black body TRD temperature sensor
May 14, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re31832 3309881 3694624 Method and apparatus for monitoring and/or correcting of a physical characteristic Fiber optic temperature sensor Circuit for processing a digital signal Optical temperature measurement technique utilizing phosphors Temperature-sensitive optrode Multiplexing and calibration techniques for optical signal measuring instruments Optical temperature measurement techniques utilizing phosphors Inventors
ApplicationNo. 882826 filed on 05/14/1992US Classes:374/161, Change of optical property250/227.14, Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell)250/393, With radiant energy source250/458.1, LUMINOPHOR IRRADIATION374/131With radiation conducting elementExaminersPrimary: Yasich, Daniel M.Attorney, Agent or FirmForeign Patent References
International ClassesG01K 011/20G01K 017/00 AbstractA temperature sensing system has a signal means which provides a signal representative of a temperature responsive luminescence, where the luminescence has a characteristic time-rate-of-decay. A means for comparison is connected to the signal means and samples the signal during two time intervals, the first interval overlapping the second. The averages of the samples are compared to provide a difference signal representative of the difference between the two measured averages. Control means coupled to the comparison means provide an output representing the temperature as a function of the time-rate-of-decay, by adjusting the overlapping intervals so that the difference signal converges to a preselected limit.Other References
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