Ametek Aerospace Products Inc.

General Electric Company

Ametek, Inc.

Ametex, Inc.

Helmar R Steglich

William M Glasheen

George P Sacco, Jr

Deidre E Cusack

Charles DeMilo

Diedre E Cusack

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.

System and method for determining combustion temperature using infrared emissions

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.

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.

High temperature gas stream optical flame sensor and method for

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.

Electronic clamping circuit

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.

High temperature gas stream optical flame sensor

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.

Electronic circuit including operational amplifier and clamping circuit

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. In this fashion, a signal from a three wire synchro may be repeated and the phase and frequency controlled to complement the output equipment without requiring the use of mechanically servoed synchro repeaters.

Solid state repeater for three wire synchro with selectable phase and

The instant invention relates to turn-rate signal generating circuitry for interrupting slaving of the directional gyro and roll erection of the vertical gyro in a heading, attitude and reference system whenever the turn-rate of the vehicle on which the system is mounted exceeds a predetermined rate. Cutoff of slaving and roll erection eliminates acceleration induced dynamic errors produced by excessive turn rates and is effectuated in response to a turn-rate signal (i.e., an angular rate signal) generated indirectly from angular position (i.e., shaft position) information. The angular position information is in the form of carrier signals amplitude modulated as a function of the sine and cosine of the angle .theta.. These signals are converted to modify the carrier phases so that they are respectively sinusoidal and cosinusoidal functions of the carrier frequency. The sinusoidal and cosinusoidally varying carrier signals are combined to produce a constant amplitude, variable carrier-phase signal, the phase of which is directly proportional to the shaft angle .theta.. The constant amplitude variable phase carrier is processed in a phase-to-pulse width converter to produce an output pulse which is proportional to the angle .theta.. This signal is differentiated and filtered to produce a varying DC signal proportional to the angular rate of change (d.theta./dt). The rate signal is compared with a reference signal to determine when the rate of angular change exceeds a predetermined value to actuate turn-rate cutoff. By virtue of this novel arrangement, which does not require demodulation of the amplitude modulated carrier signal which represents angular position, the system is insensitive to variations in the excitation voltages for the electromechanical devices, such as synchros or the like, which produce the angular position signals.

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Marblehead, MA, United States of America

Helmar R Steglich