Pulse Sensor Measurement System And Method
A sensor device for transcutaneous monitoring a blood flow within a human or animal, the sensor device including: a microphone for picking up pneumo-acoustic changes; and a diaphragm interposed between the microphone and the surface of a user when in use, forming a sealed cavity between the microphone and diaphragm surface.
1 . A sensor device for transcutaneous monitoring of blood flow within a human or animal, the sensor device including:
a microphone for picking up pneumo-acoustic changes; and
a diaphragm interposed between the microphone and the surface of a user when in use, forming a sealed cavity between the microphone and diaphragm surface.
2 . The sensor as claimed in claim 1 wherein said microphone is mounted on a planar surface and said diaphragm is also mounted to said planar surface.
3 . The sensor as claimed in claim 2 wherein said diaphragm forms a generally convex surface engaging the human or animal when in use.
4 . The sensor as claimed in claim 2 wherein said diaphragm is mounted on a surrounding skirt and engages with the planar surface.
5 . The sensor as claimed in claim 2 wherein said skirt limits excessive deformation of said diaphragm in use.
6 . The sensor as claimed in claim 1 further including a wrist strap for mounting the sensor on the wrist of a human user.
7 . The sensor as claimed in claim 1 wherein, when in use, said sealed cavity is at greater than atmospheric pressure.
8 . The sensor as claimed in claim 7 wherein an increase in cavity pressure is consequential upon engagement of the diaphragm with the human or animal being monitored.
9 . A sensor device for transcutaneous monitoring a blood flow within a human or animal, substantially as hereinbefore described with reference to the accompanying drawings.