Apparatus and method for detecting pulse wave
First Claim
1. A pulse wave detecting apparatus comprising:
- a pressure sensor array that has a surface on which plural pressure sensors are disposed, the surface being pressed against an artery of a living human body so that a disposing direction of the pressure sensors intersects with the artery;
a pressurization section pressing the surface of the pressure sensor array against the artery;
a sensor selecting section selecting a candidate of the pressure sensor located above the artery from the pressure sensors in the pressure sensor array pressed by the pressurization section; and
a pulse wave detecting section detecting a pulse wave generated in the artery based on pressure information outputted from the pressure sensor selected by the sensor selecting section in the course where a pressurization force imposed on the pressure sensor array is continuously changed by the pressurization section, wherein the sensor selecting section includes;
a pressure information acquiring section acquiring pressure information from the respective pressure sensors of the pressure sensor array simultaneously along the time axis; and
a hard member sensor excluding section extracting information on a pressure component caused by a hard member of the living human body different from the artery thereof, from the pressure information of the respective pressure sensors acquired by the pressure information acquiring section to specify the pressure sensor located above the hard member from the extracted pressure component information and to select the pressure sensors left after the specified pressure sensor is excluded from the plural pressure sensors as candidates of the pressure sensor located above the artery.
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Abstract
Provided are an apparatus and method of detecting a pulse wave at the certain position of an artery. A pressure sensor array has a pressurization surface on which plural pressure sensors are disposed in a direction intersecting with an artery. The pressurization surface, when a pulse wave is detected, is pressed against a surface of a living human body by a cuff pressure in a pressurization cuff. CPU, when a pulse wave is detected, inputs voltage signals indicating pressure information from the plural pressure sensors simultaneously along with the time axis. CPU extracts the DC component indicating a pressure component caused by a hard member from a voltage signal to specify the pressure sensor located above the hard member from the extracted DC component. The pressure sensors left after the specified pressure sensor located above the hard member among the plural pressure sensors are selected as candidates of the pressure sensor located above the artery to detect a pulse wave generated in the artery based on pressure information outputted from the selected pressure sensors.
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Citations
19 Claims
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1. A pulse wave detecting apparatus comprising:
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a pressure sensor array that has a surface on which plural pressure sensors are disposed, the surface being pressed against an artery of a living human body so that a disposing direction of the pressure sensors intersects with the artery;
a pressurization section pressing the surface of the pressure sensor array against the artery;
a sensor selecting section selecting a candidate of the pressure sensor located above the artery from the pressure sensors in the pressure sensor array pressed by the pressurization section; and
a pulse wave detecting section detecting a pulse wave generated in the artery based on pressure information outputted from the pressure sensor selected by the sensor selecting section in the course where a pressurization force imposed on the pressure sensor array is continuously changed by the pressurization section, wherein the sensor selecting section includes;
a pressure information acquiring section acquiring pressure information from the respective pressure sensors of the pressure sensor array simultaneously along the time axis; and
a hard member sensor excluding section extracting information on a pressure component caused by a hard member of the living human body different from the artery thereof, from the pressure information of the respective pressure sensors acquired by the pressure information acquiring section to specify the pressure sensor located above the hard member from the extracted pressure component information and to select the pressure sensors left after the specified pressure sensor is excluded from the plural pressure sensors as candidates of the pressure sensor located above the artery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of detecting a pulse wave detecting a pulse wave generated in the artery of a living human body based on pressure information outputted from a pressure sensor in the course where a pressurization force imposed on a pressure sensor array, which has a surface on which plural pressure sensors are disposed, the surface being disposed above the artery of the living human body and being pressed against the artery thereof so that a disposing direction of the pressure sensors intersects with the artery, is continuously changed, comprising
a sensor selecting step selecting a candidate of the pressure sensor located above the artery among the pressure sensors of the pressure sensor array, wherein the sensor selecting step includes: -
a pressure information acquiring step of acquiring pressure information from the respective pressure sensors of the pressure sensor array simultaneously along the time axis; and
a hard member sensor excluding step of extracting information on a pressure component caused by a hard member of the living human body different from the artery thereof from pressure information outputted by the respective pressure sensors acquired in the pressure information acquiring step to specify the pressure sensor located above the hard member from the extracted pressure component information and to select the pressure sensors left after the specified pressure sensor is excluded among the plural pressure sensors as candidates of the pressure sensor located above the artery.
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Specification