초록 ▼

A system and method for remotely determining at least one of the temperature of, and the relative concentrations of species making up, a hot fluid, based on the spectral structure of radiation emitted from the fluid. Thermal radiation over a field of view including the hot fluid is collected. At lea

A system and method for remotely determining at least one of the temperature of, and the relative concentrations of species making up, a hot fluid, based on the spectral structure of radiation emitted from the fluid. Thermal radiation over a field of view including the hot fluid is collected. At least a portion of the emission spectrum from the collected radiation is resolved. The resolved emission spectrum is resolved into spectra that are characteristic of specific emitting species and emitter temperatures. The temperature of, and the relative concentrations of species making up, the hot fluid, are determined from the relative amounts of at least two resolved spectra.

대표청구항 ▼

A system and method for remotely determining at least one of the temperature of, and the relative concentrations of species making up, a hot fluid, based on the spectral structure of radiation emitted from the fluid. Thermal radiation over a field of view including the hot fluid is collected. At lea

A system and method for remotely determining at least one of the temperature of, and the relative concentrations of species making up, a hot fluid, based on the spectral structure of radiation emitted from the fluid. Thermal radiation over a field of view including the hot fluid is collected. At least a portion of the emission spectrum from the collected radiation is resolved. The resolved emission spectrum is resolved into spectra that are characteristic of specific emitting species and emitter temperatures. The temperature of, and the relative concentrations of species making up, the hot fluid, are determined from the relative amounts of at least two resolved spectra. mprises subtracting two subsequent phase angles corresponding to two subsequent positions of the space vector. 6. The method of claim 4, wherein analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor comprises performing frequency spectrum analysis of the space vector angular fluctuation. 7. The method of claim 6, wherein performing frequency spectrum analysis of the space vector angular fluctuation comprises: computing a frequency spectrum of the space vector angular fluctuation; and analyzing the amplitude of a first spectral component of the frequency spectrum at a first frequency. 8. The method of claim 6, wherein performing frequency spectrum analysis of the space vector angular fluctuation comprises: computing one frequency component of the space vector angular fluctuation; and analyzing the amplitude of a first spectral component of the frequency component at a first frequency. 9. The method of claim 7, wherein analyzing the amplitude of a first spectral component of the frequency spectrum at a first frequency comprises analyzing fluctuations in amplitude of the first spectral component in order to detect at least one fault associated with the motor. 10. The method of claim 7, wherein the first frequency is approximately twice the frequency of power applied to the motor. 11. The method of claim 10, wherein analyzing the amplitude of the first spectral component comprises using a Goertzel algorithm to extract the first spectral component from the space vector angular fluctuation. 12. The method of claim 11, wherein analyzing the amplitude of the first spectral component comprises using a Goertzel algorithm to extract the amplitude of the first spectral component from the space vector angular fluctuation during each cycle of the power applied to the motor. 13. The method of claim 10, wherein the at least one fault comprises at least one of a stator fault, a rotor fault and an imbalance in the power applied to the motor. 14. The method of claim 13, further comprising distinguishing motor faults from unbalanced power conditions. 15. The method of claim 14, wherein distinguishing motor faults from unbalanced power conditions comprises using a fuzzy logic system. 16. A method of detecting faults in a motor, comprising: obtaining a voltage signal associated with the motor; calculating a space vector from the voltage signal; determining a space vector angular fluctuation from the space vector; and analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor. 17. The method of claim 16, wherein obtaining the voltage signal comprises sampling first, second and third voltage signals associated with the motor. 18. A method of detecting faults in a motor, comprising: determining a threshold parameter; obtaining a first and second current samples; calculating a difference between the first and the second current samples; on the difference being less than the threshold parameter, remembering the difference as a healthy sample; and on the difference being greater than the threshold parameter, modifying the threshold parameter to be equal to the difference. 19. The method of claim 18, wherein determining a threshold parameter comprises determining a threshold parameter large enough to tolerate normal fluctuations and small enough to detect short circuits in stator windings. 20. A system for detecting faults in a motor, comprising: means for obtaining a current signal associated with the motor; means for calculating a space vector from the current signal; means for determining a space vector angular fluctuation from the space vector; and means for analyzing the space vector angular fluctuation in order to detect at least one fault associated with the motor. 21. A system for detecting faults in a motor, comprising a diagnostic component operative to obtain a space vector angular fluctuation from a current signal relating to operation of the motor, and to analyze the space vector angular fluctuation in order to detect at least one fault in the motor. 22. The system of claim 21, comprising a sensor operatively associated with the motor to obtain the current signal relating to the operation of the motor, and adapted to provide the current signal to the diagnostic component. 23. The system of claim 22, further comprising: a controller operatively associated with the motor and adapted to operate the motor in a controlled fashion; and a motor drive adapted to provide electrical power to the motor according to a control signal from the controller. 24. The system of claim 20, wherein the diagnostic component is adapted to obtain a current signal associated with the motor, to calculate a space vector from the current signal, to determine a space vector angular fluctuation from the space vector, and to analyze the space vector angular fluctuation in order to detect at least one fault associated with the motor. 25. The system of claim 24, wherein the diagnostic component is adapted to sample first, second, and third phase current signals associated with the motor in order to obtain the current signal, and to calculate the space vector from the current signal. 26. The system of claim 25, wherein the diagnostic component is adapted to perform a comparison of the space vector with a reference space vector, wherein the reference space vector is a function of a constant frequency and amplitude, and to compute angular fluctuations in the space vector according to the comparison, in order to determine the space vector angular fluctuation. 27. The system of claim 25, wherein the diagnostic component is adapted to perform a comparison of the space vector with a reference space vector, wherein the reference space vector is a function of a voltage space vector. 28. The system of claim 26, wherein the diagnostic component is adapted to compute an arctangent function in order to compute angular fluctuations in the space vector. 29. The system of claim 26, wherein the diagnostic component is adapted to perform frequency spectrum analysis of the space vector angular fluctuation in order to analyze the space vector angular fluctuation in order to detect at least one fault associated with the motor. 30. The system of claim 29, wherein the diagnostic component is adapted to compute a frequency spectrum of the space vector angular fluctuation, and to analyze the amplitude of a first spectral component of the frequency spectrum at a first frequency in order to perform frequency spectrum analysis of the space vector angular fluctuation. 31. The system of claim 30, wherein the diagnostic component is adapted to analyze fluctuations in amplitude of the first spectral component in order to detect at least one fault associated with the motor. 32. The system of claim 30, wherein the first frequency is approximately twice the frequency of power applied to the motor. 33. The system of claim 32, wherein the diagnostic component is adapted to use a Goertzel algorithm to extract the amplitude of the first spectral component from the space vector angular fluctuation in order to analyze the-amplitude of the first spectral component. 34. The system of claim 32, wherein the at least one fault comprises at least one of a stator fault, a rotor fault, and an imbalance in the power applied to the motor. the request to start the second following control from the second following control start requesting section when the velocity of the vehicle detected by the vehicle velocity detecting section becomes equal to or lower than the second set vehicle velocity according to the deceleration manipulation by the vehicle driver detected by the deceleration manipulation detecting section after the first following control stop section stops the first following control. 5. A vehicle velocity control apparatus for an automotive vehicle as claimed in claim 2, further comprising a deceleration reduction control section that executes a deceleration reduction control to gradually reduce the deceleration of the vehicle after the first following control stop section stops the first following control and wherein the second request allowing section rejects the request to start the second following control from the second control start requesting section while the deceleration reduction control section executes the deceleration reduction control. 6. A vehicle velocity control apparatus for an automotive vehicle as claimed in claim 2, further comprising a deceleration reduction control section that executes a deceleration reduction control to gradually reduce the deceleration of the vehicle after the first following control stop section stops the first following control and wherein the second following vehicle velocity control section executes the second following control, with a vehicular motion at a time point at which the second request allowing section allows the request to start the second following control from the second following control start requesting section as an initial value, while the deceleration reduction control section executes the deceleration reduction control. 7. A vehicle velocity control apparatus for an automotive vehicle as claimed in claim 1, wherein the second following vehicle control section comprises a second following control stop section that stops the second following control when the vehicle velocity of the vehicle detected by the vehicle velocity detecting section become higher than the second set vehicle velocity. 8. A vehicle velocity control apparatus for an automotive vehicle as claimed in claim 1, further comprising an acceleration manipulation detecting section that detects an acceleration manipulation by a vehicle driver and wherein the first request allowing section allows the request to start the first following control when the request to start the first following control is issued from the first following control start requesting section while the acceleration manipulation detecting section detects the acceleration manipulation by the driver and the acceleration manipulation is ended in a state in which the velocity of the vehicle falls in the velocity range which is equal to or higher than the first set vehicle velocity. 9. A vehicle velocity control apparatus for an automotive vehicle as claimed in claim 1, further comprising an acceleration manipulation detecting section that detects an acceleration manipulation by a vehicle driver and wherein the first request allowing section rejects the request to start the first following control when the request to start the first following control is issued from the first following control start requesting section while the acceleration manipulation detecting section detects the acceleration manipulation by th