초록 ▼

A surveillance transceiver system is provided for receiving extended squitters from Mode S transponders, translating the squitters into ADS-B state vectors in UAT format, and transmitting the ADS-B state vectors using a Universal Access Transceiver (UAT) datalink. The surveillance transceiver system

A surveillance transceiver system is provided for receiving extended squitters from Mode S transponders, translating the squitters into ADS-B state vectors in UAT format, and transmitting the ADS-B state vectors using a Universal Access Transceiver (UAT) datalink. The surveillance transceiver system bridges the gap created by differently-equipped aircraft by using multiple datalinks to provide seamless ADS-B surveillance. The module for processing the extender squitters includes a 1090 MHz receiver and a computer processor in communication with the UAT processor for parsing the squitter and composing the ADS-B state vector in UAT format for broadcast.

대표청구항 ▼

A surveillance transceiver system is provided for receiving extended squitters from Mode S transponders, translating the squitters into ADS-B state vectors in UAT format, and transmitting the ADS-B state vectors using a Universal Access Transceiver (UAT) datalink. The surveillance transceiver system

A surveillance transceiver system is provided for receiving extended squitters from Mode S transponders, translating the squitters into ADS-B state vectors in UAT format, and transmitting the ADS-B state vectors using a Universal Access Transceiver (UAT) datalink. The surveillance transceiver system bridges the gap created by differently-equipped aircraft by using multiple datalinks to provide seamless ADS-B surveillance. The module for processing the extender squitters includes a 1090 MHz receiver and a computer processor in communication with the UAT processor for parsing the squitter and composing the ADS-B state vector in UAT format for broadcast. racteristic specific to the first type power system interference source are detected. 4. The method of claim 3 wherein said first and second type power system interference sources are corona and spark discharge, respectively, said detecting the spectral characteristic and the further spectral characteristic comprises: measuring a first portion of the sensed signal modulated at the power system frequency; measuring a second portion of the sensed signal modulated at twice the power system frequency; comparing the first portion against the second portion to detect that the first portion is at least a given ratio of the second portion; and providing the operator indication representative of corona when the first portion is detected to be at least the given ratio of the second portion. 5. A method of discriminating power system sources of interference from ambient interference and other interference sources, the method comprising: sensing a signal from a targeted source; spectrally analyzing the sensed signal to detect a spectral characteristic related to power system interference sources, wherein said spectrally analyzing comprises detecting the spectral characteristic that a portion of the sensed signal correlated to a power system frequency is at least a given proportion of the sensed signal; and providing an operator indication when the spectral characteristic is detected. 6. The method of claim 5 wherein said detecting comprises: measuring a portion of the sensed signal modulated at the power system frequency; measuring an aggregate value of the sensed signal; and comparing the measured portion to the measured aggregate value to detect the spectral characteristic. 7. A method of discriminating power system sources of interference from ambient interference and other interference sources, the method comprising: sensing a signal from a targeted source; detecting a portion of the sensed signal. in at least one spectral interval correlated to an electrical power frequency; detecting an aggregate measure of the sensed signal; comparing the detected portion in the at least one spectral interval to the aggregate measure; and indicating that the detected portion is at least a threshold proportion of the aggregate measure. 8. The method of claim 7 for further discriminating between at least first and second type power system interference sources, the method further comprising: detecting portions of the sensed signal in first and second spectral intervals correlated to the electrical power frequency; comparing the detected portions in the first and second spectral intervals; and indicating that the detected portion in the first spectral interval exceeds a threshold ratio of the detected portion in the second spectral interval. 9. The method of claim 8 wherein the types of power system interference sources include corona and sparking discharge sources, and wherein the spectral intervals include intervals about the electrical power frequency and about a harmonic of the electrical power frequency. 10. A method of pinpointing a location of an interference source, the method comprising: sensing a signal from the source; detecting a spectral signature of the sensed signal, the spectral signature including at least a value of the sensed signal modulated at a whole integer multiple of an electrical power frequency; assessing similarity of the detected spectral signature to a known spectral signature of a power system interference source; and providing an operator perceptible indication of the similarity of the detected spectral signature to the known spectral signature. 11. The method of claim 10 wherein said detecting, assessing and providing comprises forming an audio signal based on filtering the sensed signal to within a pass band about the electrical power frequency. 12. The method of claim 10 wherein said detecting, assessing and providing comprises forming a signal strength measurement based on filtering the sensed signal to within a pass band about the electrical power frequency. 13. The method of claim 10 wherein said detecting, assessing and providing comprises producing an indication that the value of the sensed signal modulated at the whole integer multiple of the electrical power frequency exceeds a threshold proportion of an aggregate measure of the sensed signal. 14. The method of claim 10 wherein said detecting, assessing and providing comprises calculating a similarity measure of the similarity of the detected signature to the known signature, and producing an indication that the similarity measure exceeds a threshold. 15. The method of claim 10 wherein the spectral signature includes a first value of the sensed signal modulated at a first whole integer multiple of the electrical power frequency and a second value of the sensed signal modulated at a second whole integer multiple of the electrical power frequency, and wherein said assessing similarity and providing comprises: comparing the first value with the second value; and indicating that the first value exceeds a threshold proportion of the second value. 16. A method of discriminantly identifying an interference source with discrimination from ambient interference, the method comprising: receiving an ultrasonic signal; pass band filtering the received signal within a pass band about a whole integer multiple of an electrical power frequency; producing an operator-perceptible signal strength indication of a relative strength of the filtered signal; producing an aggregate measure of the received signal; producing a measure of the filtered signal; comparing the aggregate measure and the filtered signal measure; and producing an operator-perceptible indication representative of whether the filtered signal measure exceeds a substantial proportion of the aggregate signal measure. 17. The method of claim 16 further comprising: further pass band filtering the received signal within a further pass band about a further whole integer multiple of an electrical power frequency; producing a measure of the further filtered signal; comparing the filtered signal measure to the further filtered signal measure; and producing an operator-perceptible indication representative of whether the filtered signal measure also exceeds a ratio of the further filtered signal measure. 18. A device for locating power line faults with improved sensitivity to and discrimination of spark discharge and corona from non-power line sources, the device comprising: an ultrasonic transducer; an amplifier coupled to the ultrasonic transducer; a pass band filter having a pass band about a whole integer multiple of an electrical power frequency; and an indicator producing an operator-perceptible indication of a strength of a signal produced from the ultrasonic transducer and amplifier within the pass band of the pass band filter. 19. The device of claim 18 wherein the indicator comprises an audio amplifier and a speaker for producing an audio signal indication to the operator of the signal strength within the pass band. 20. The device of claim 18 wherein the indicator comprises a signal strength meter for producing a visual meter indication to the operator of the signal strength within the pass band. 21. The device of claim 18 wherein the indicator comprises a comparator circuit for measuring a proportion of the signal within the pass band relative to an aggregate measure of the signal as a whole, and an operator-perceptible indication device for producing an indication to the operator when the measured proportion exceeds a threshold. 22. The device of claim 18 further comprising: a second pass band filter having a second pass band about a second whole integer multiple of an electrical power frequency; a comparator for comparing the signal within the pass bands of the first and second pass band filters; and a second indicator producing an operator-perceptib