초록

A combustion chamber-thermionic device-electric motor is provided in an automobile. The combustion chamber of the present invention provides a heat output which is transformed to electricity by the thermionic device and a motor converts the electrical energy to motive power for the wheels.

대표청구항 ▼

A combustion chamber-thermionic device-electric motor is provided in an automobile. The combustion chamber of the present invention provides a heat output which is transformed to electricity by the thermionic device and a motor converts the electrical energy to motive power for the wheels. cing of s

A combustion chamber-thermionic device-electric motor is provided in an automobile. The combustion chamber of the present invention provides a heat output which is transformed to electricity by the thermionic device and a motor converts the electrical energy to motive power for the wheels. cing of said plurality of digital pulses at said carrier frequency is done entirely with digital components. 9. The method of claim 8, further comprising providing a plurality of dipole antennas within a downhole tool. 10. The method of claim 1, further comprising: transmitting said plurality of digital pulses through a non-ferrous wellbore tubular. 11. A downhole system for detecting an interface in an earth formation, said downhole system being operable in a borehole within said earth formation, said downhole system comprising: an all digital signal generator for producing a plurality of digital pulses at a carrier frequency; at least one dipole antenna associated with said downhole system for transmitting a transmitted signal and receiving a received signal; an analog to digital signal converter for sampling said received signal at a sampling rate more than five times said carrier frequency to produce a received digital signal; and a correlator for comparing said plurality of digital pulses with respect to said received digital signal. 12. The downhole system of claim 11, further comprising a digital to analog converter for converting said plurality of digital pulses at said carrier frequency to an analog signal. 13. The downhole system of claim 11, further comprising: a plurality of dipole antennas. 14. The downhole system of claim 11, wherein said analog to digital converter has a sampling speed of from five to fifty times said carrier frequency. 15. The downhole system of claim 11, wherein said carrier frequency is selectable and may be selected to be less than 1 MHz. 16. The downhole system of claim 11, wherein said carrier frequency is between 100 KHz and 1 MHz. 17. The downhole system of claim 11, further comprising: a gate control for selecting a portion of said received signal related to a selected distance from said borehole. 18. The downhole system of claim 11, further comprising: a digital accumulator operable for accumulating said plurality of digital pulses prior to said step of correlation. 19. A system for detecting an interface in a geological formation, comprising: a transmitter operable for producing a plurality of digital pulses into said geological formation at a selectable carrier frequency from at least 500 KHz to 1 MHz; a receiver for receiving a received signal comprised of reflections of said plurality of digital pulses from said geological formation; an analog to digital converter for said receiver having a sampling speed at least five times faster than said carrier frequency to produce a digitized received signal; and a correlator for comparing at least a portion of said digitized received signal with said plurality of digital pulses. 20. The system of claim 19, wherein said system is operable for selectively transmitting at a frequency from 100 KHz to over 1 MHz. 21. The system of claim 19, further comprising a gate for selecting a time interval of said digitized received signal. 22. The system of claim 19, further comprising an accumulator for storing said digitized received signal for use by said correlator. 23. The system of claim 19, further comprising a digital to analog converter for said transmitter. 24. The system of claim 19, wherein said analog to digital converter has a sampling speed at least from five to fifty times said carrier frequency. 25. The system of claim 19, further comprising at least one dipole antenna. 26. The system of claim 19, further comprising a non-ferrous wellbore tubular through which said transmitter transmits said plurality of digital pulses. 27. The system of claim 19, further comprising one or more antennas positioned within a borehole. 28. The system of claim 19, wherein said transmitter is operable for producing said plurality of digital pulses at said carrier frequency entirely with digital components. 29. The system of claim 19, further comprising a digitally controllable filter for adjusting a frequency response of said