초록 ▼

A method of measuring the distance between two objects and/or the speed of one object in relation to the other, the objects incorporating respectively a transmitter-receiver unit and a transponder or reflector, in which method a phase comparison is made between a signal transmitted by the transmitte

A method of measuring the distance between two objects and/or the speed of one object in relation to the other, the objects incorporating respectively a transmitter-receiver unit and a transponder or reflector, in which method a phase comparison is made between a signal transmitted by the transmitter-receiver unit and a signal received in the transmitter-receiver unit and transmitted from the transponder or reflector. In accordance with the invention the transmitter-receiver unit is caused to transmit signals of microwave frequency, preferably about 2450 MHz, this transmission comprising the transmission of a first signal having a first frequency, the transmission of at least one second signal having a higher or lower frequency, and the transmission of a third signal having the same frequency as the first mentioned signal, wherewith the phase differences f

대표청구항 ▼

A method of measuring the distance between, and/or the mutual relative speed, of two objects which respectively include a transmitter-receiver unit and a transponder, and in which method a phase comparison is made between a signal transmitted from the transmitter-receiver unit and a signal received

A method of measuring the distance between, and/or the mutual relative speed, of two objects which respectively include a transmitter-receiver unit and a transponder, and in which method a phase comparison is made between a signal transmitted from the transmitter-receiver unit and a signal received in said unit from the transponder, wherein the transmitter-receiver unit is caused to transmit plural signals of microwave frequency, approximately about 2450 MHz; said transmission of plural signals comprising transmitting a first signal having a first frequency; transmitting at least one second signal having a higher or a lower frequency than said first signal; transmitting a third signal having the same frequency as said first mentioned signal; said first, second and third signals being transmitted in succession, all of said first, second and third signals being of microwave frequency as herein set forth, and all of said first, second and third signals, while transmitted, being continuous wave signals whereby, for each said transmitted signal a phase difference f