Device for time-resolved and space-resolved location of a miniaturised emitter
First Claim
1. Transmitting and receiving means for ultrasonic waves, comprising a miniaturised ultrasonic generator (6) which operates independently on a battery and which is appropriate for accommodation in a small encapsulating case (10) for medical examinations, as well as at least one ultrasonic receiver (11) which is connected to an analyser which determines, with resolution in terms of time, the distance between said ultrasonic generator (6) and said ultrasonic receiver (10),characterised in that said transmitting means comprisesan oscillator (1) for generating a fundamental mode (f0),a generator (2) for generating a pulse string which may be used to activate said ultrasonic generator (6),a code generator (3) which modulates the phase of the pulse string,a phase shifter (4) which modulates said code onto said fundamental mode (f0), as well asa driver stage (5) which is connected to said ultrasonic generator (6), and that said receiving means includes one correlation receiver per ultrasonic receiver (11), which compresses the pulse strings emitted by said transmitting means into distinct correlation peaks.
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Abstract
What is disclosed here is a transmitting and receiving means for ultrasonic waves, comprising a miniaturized ultrasonic generator which operates inendently on a battery and which is appropriate for accommodation in a small encapsulating case for medical examinations, as well as at least one ultrasonic receiver which is connected to an analyzer which determines, with resolution in terms of time, the distance between the ultrasonic generator and the ultrasonic receiver.
The invention is characterised by the provisions that the transmitting means comprises
an oscillator for generating a fundamental mode,
a generator for generating a pulse string which may be used to activate the ultrasonic generator,
a code generator which modulates the phase of the pulse string,
a phase shifter which modulates the code onto the fundamental mode, as well as
a driver stage which is connected to the ultrasonic generator, and
that the receiving means includes one correlation receiver per ultrasonic receiver, which compresses the pulse strings emitted by the transmitting means into distinct correlation peaks.
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Citations
16 Claims
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1. Transmitting and receiving means for ultrasonic waves, comprising a miniaturised ultrasonic generator (6) which operates independently on a battery and which is appropriate for accommodation in a small encapsulating case (10) for medical examinations, as well as at least one ultrasonic receiver (11) which is connected to an analyser which determines, with resolution in terms of time, the distance between said ultrasonic generator (6) and said ultrasonic receiver (10),
characterised in that said transmitting means comprises an oscillator (1) for generating a fundamental mode (f0), a generator (2) for generating a pulse string which may be used to activate said ultrasonic generator (6), a code generator (3) which modulates the phase of the pulse string, a phase shifter (4) which modulates said code onto said fundamental mode (f0), as well as a driver stage (5) which is connected to said ultrasonic generator (6), and that said receiving means includes one correlation receiver per ultrasonic receiver (11), which compresses the pulse strings emitted by said transmitting means into distinct correlation peaks.
Specification