Abstract: The present invention relates to a combustion temperature sensor, and, more particularly, to a combustion temperature sensor that measures infrared radiation emitted at several preselected wavelengths from a flame and/or a flame's hot gas at a turbine inlet location and applies the energy signals. to a calculation model to yield temperature.

Abstract: The present invention relates to a combustion temperature sensor, and, more particularly, to a combustion temperature sensor that measures infrared energy emitted at several preselected wavelengths from a flame and/or a flame's hot gas at a turbine inlet location and applies the energy signals to a calculation model to yield temperature.

Abstract: The present invention relates to a combustion temperature sensor, and, more particularly, to a combustion temperature sensor that measures infrared energy emitted at several preselected wavelengths from a flame and/or a flame's hot gas at a turbine inlet location and applies the energy signals to a calculation model to yield temperature.

Abstract: A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, and method for fabricating same is provided. The sensor generally comprises a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame. In a preferred embodiment, the photodiode and amplification hardware are disposed within a sensor housing and the photodiode is situated within a fuel/air premixer.

Abstract: An electronic clamping circuit is provided. In one preferred embodiment, the clamping circuit includes a pair of diodes connected in series, both having the same bias, which are shunted across a feedback path of a transimpedance amplifier circuit. A capacitor is connected to a node in-between the diodes and a potential (e.g., ground). The arrangement of the diodes and capacitor serve to keep the amplifier circuit's operation within its linear limits without severely degrading its bandwidth.

Abstract: A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, and method for fabricating same is provided. The sensor generally comprises a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame. In a preferred embodiment, the photodiode and amplification hardware are disposed within a sensor housing and the photodiode is situated within a fuel/air premixer.

Abstract: A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, the sensor generally comprising a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame, in some embodiments the photodiode and amplification hardware being disposed within a sensor housing, in another embodiment for use in an aeroderivative premixed combustion system, the photodiode being situated within a fuel/air premixer.

Abstract: An electronic clamping circuit is provided in one preferred embodiment, the clamping circuit includes a pair of series-connected diodes, both having the same bias, which are shunted across a feedback path of a transimpedance amplifier circuit. A capacitive element is connected to a node in-between the diodes and a potential (e.g., ground). The arrangement of the diodes and capacitive element serve to keep the amplifier circuit's operation within its linear limits without severely degrading its bandwidth.

Abstract: The instant invention relates to a repeater for processing signals from a three wire synchro to control carrier phasing and frequency, while retaining identity of the angular information. The solid state repeater consists of an arrangement in which the synchro signals bearing the angular information are first demodulated. The demodulated signals are thereafter remodulated in a closed loop modulating network.The phase and frequency of the carrier which is modulated in the closed loop modulating network may be controlled as desired. The modulated carrier is impressed on a negative feedback path in which the signal is demodulated utilizing the selected carrier to produce a variable DC signal which is fed back to the input of the modulating loop so that at null balance the output signal from the modulating path duplicates the angular information from the three wire synchro except that the carrier phase and frequency is controlled as desired.