System and device for acoustic measuring in a medium

A method for measuring velocity of sound in a medium in a borehole, the method comprising:

• providing a device having:
• a measuring area;
• an acoustic transmitter situated in a first surface of the measuring area, the acoustic transmitter in communication with a processor;
• and
• an acoustic receiver situated in a second surface of the measuring area and non-parallel to the first surface, the acoustic receiver in communication with the processor at least one of the acoustic transmitter or the acoustic receiver having a plurality of acoustic elements;
• the acoustic transmitter operable to emit a series of acoustic waveforms;
• the acoustic receiver operable to receive an acoustic signal that is a result of the series of acoustic waveforms;
• measuring via the processor, a time between when a predefined portion of one of the series of acoustic waveforms was emitted and when a predefined portion of the received acoustic signal corresponding to the predefined portion of one of the series of acoustic waveforms is received by the acoustic receiver;
• correlating via the processor, the measured time to a reference time of an acoustic waveform traveling in a known medium, the reference time corresponding to a velocity of sound in the known medium;
• and
• outputting via the processor, a correlation factor which may be is used to determine the velocity of sound in the medium in the measuring area.

An acoustic measuring device of a medium within an at least partially bounded space, the acoustic measuring device comprising:

• a measuring area;
• an acoustic transmitter situated in a first surface of the measuring area;
• an acoustic receiver situated in a second surface of the measuring area and non-parallel to the first surface;
• and
• a processor in communication with the acoustic transmitter and the acoustic receiver;
• at least one of the acoustic transmitter or the acoustic receiver having a plurality of acoustic elements;
• the acoustic transmitter operable to emit a series of acoustic waveforms;
• the acoustic receiver operable to receive an acoustic signal that is a result of the emitted series of acoustic waveforms;
• the processor operable to:
• measure a time between when a predefined portion of one of the series of acoustic waveforms was emitted and when a predefined portion of the received acoustic signal corresponding to the predefined portion of one of the series of acoustic waveforms is received by the acoustic receiver;
• correlate the measured time to a reference time of an acoustic waveform traveling in a known medium, the reference time corresponding to a velocity of sound in the known medium;
• and
• output a correlation factor that is used to provide a determination of a velocity of sound in the medium within the at least partially bounded space.

A method for measuring velocity of sound in a medium within an at least partially bounded space, the method comprising:

• providing a device having:
• a measuring area;
• an acoustic transmitter situated in a first surface of the measuring area, the acoustic transmitter in communication with a processor;
• and
• an acoustic receiver situated in a second surface of the measuring area and non-parallel to the first surface, the acoustic receiver in communication with the processor at least one of the acoustic transmitter or the acoustic receiver having a plurality of acoustic elements;
• the acoustic transmitter operable to emit a series of acoustic waveforms;
• the acoustic receiver operable to receive an acoustic signal that is a result of the series of acoustic waveforms;
• measuring via the processor, a time between when a predefined portion of one of the series of acoustic waveforms was emitted and when a predefined portion of the received acoustic signal corresponding to the predefined portion of one of the series of acoustic waveforms is received by the acoustic receiver;
• correlating via the processor, the measured time to a reference time of an acoustic waveform traveling in a known medium, the reference time corresponding to a velocity of sound in the known medium;
• and
• outputting via the processor, a correlation factor which is used to determine the velocity of sound in the medium in the measuring area.

An acoustic measuring device of a medium in a borehole, the acoustic measuring device comprising:

• a measuring area;
• a first acoustic transducer situated in a first surface of the measuring area;
• a second acoustic transducer situated in a second surface of the measuring area and non-parallel to the first surface;
• and
• a processor in communication with the first and second acoustic transducers;
• the first acoustic transducer operable to emit a first series of acoustic waveforms in a direction of medium flow;
• the second acoustic transducer operable to receive an acoustic signal that is a result of the emitted first series of acoustic waveforms;
• the processor operable to calculate a first transit time based on the acoustic signal that is a result of the emitted first series of acoustic waveforms;
• the second acoustic transducer operable to emit a second series of acoustic waveforms in a direction opposite medium flow;
• the first acoustic transducer operable to receive an acoustic signal that is a result of the emitted second series of acoustic waveforms;
• the processor operable to calculate a second transit time based on the acoustic signal that is a result of the emitted second series of acoustic waveforms;
• and
• the processor providing a determination of velocity of the medium by use of the first and second calculated transit times.

An acoustic measuring device of a medium in a borehole, the acoustic measuring device comprising:

• a measuring area;
• an acoustic transducer situated in a first, slanted surface of the measuring area;
• and
• a processor in communication with the acoustic transducer;
• the acoustic transducer operable to emit an acoustic waveform of a first frequency in a direction of medium flow and to receive a return acoustic waveform reflected from particulates in a medium in a borehole of a second frequency;
• and
• the processor operable to provide a determination of flow velocity of the medium by calculating a change between the first and second frequencies.