Sensor identification method and system
First Claim
1. A method using a photoplethysmographic system, comprising:
- releasably interconnecting four terminals of a photoplethysmographic sensor to a photoplethysmographic monitor,wherein a first pair of said four terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals,wherein a second pair of said four terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals,wherein a third pair of said four terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals; and
wherein said first, second, and third pairs of terminals each utilize a unique combination of said four terminals and wherein each said first, second, and third pairs of terminals share at least one terminal with another of said first, second, and third pairs of terminals;
applying a first interrogation signal to a terminal shared by two of said pairs of terminals to obtain a first output signal across one of said two pairs of terminals;
applying a second interrogation signal across the other of said two pairs of terminals to obtain a second output signal at said shared terminal; and
utilizing at least one of said first and second output signals to identify said sensor.
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Accused Products
Abstract
An inventive method and system are provided for identifying a compatible photoplethysmographic sensor when interconnected to a given photoplethysmographic monitor. The method and system may further provide for the identification of which of a plurality of compatible sensors is interconnected to allow for selective calibration of the photoplethysmographic monitor. In this regard, the system and method may entail provision of a predetermined drive or test signal to a light source and/or identification element (i.e., sensor elements) of a photoplethysmographic sensor, and the obtainment of a corresponding output signal for use in sensor identification. In one approach, an output signal is obtained from at least one of three sensor elements each of which is interconnected between a different pair of sensor terminals which is a unique combination of two of four sensor terminals on the sensor. In this regard, individual circuits may be formed through each sensor element allowing for enhanced flexibility in signal application.
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Citations
30 Claims
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1. A method using a photoplethysmographic system, comprising:
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releasably interconnecting four terminals of a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of said four terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of said four terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of said four terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals; and wherein said first, second, and third pairs of terminals each utilize a unique combination of said four terminals and wherein each said first, second, and third pairs of terminals share at least one terminal with another of said first, second, and third pairs of terminals; applying a first interrogation signal to a terminal shared by two of said pairs of terminals to obtain a first output signal across one of said two pairs of terminals; applying a second interrogation signal across the other of said two pairs of terminals to obtain a second output signal at said shared terminal; and utilizing at least one of said first and second output signals to identify said sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method using a photoplethysmographic system, comprising:
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releasably interconnecting a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across a diode coupled between said third pair of terminals, wherein said diode forms an identification element; and wherein said first, second, and third pairs of terminals each utilize a unique combination of terminals and wherein each said first, second, and third pairs of terminals share at least one terminal with another of said first, second, and third pairs of terminals; applying a first electrical interrogation signal to a terminal shared by two of said pairs of terminals to obtain a first output signal across one of said two pairs of terminals; applying a second electrical interrogation signal across the other of said two pairs of terminals to obtain a second output signal at said shared terminal, wherein at least one of said first and second applying steps comprises applying an electrical signal across said third pair of terminals, wherein at least one of said first and second outputs is an output across said third pair of terminals; and utilizing at least one of said first and second output signals to identify said sensor.
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29. A method using a photoplethysmographic system, comprising:
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releasably interconnecting a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals; and wherein said first, second, and third pairs of terminals each utilize a unique combination of terminals and wherein each said first, second, and third pairs of terminals share at least one terminal with another of said first, second, and third pairs of terminals; applying a first interrogation signal to a terminal shared by two of said pairs of terminals to obtain a first output signal across one of said two pairs of terminals; applying a second interrogation signal across the other of said two pairs of terminals to obtain a second output signal at said shared terminal; utilizing at least one of said first and second output signals to identify said sensor; and disabling said third pair of terminals on said sensor.
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30. A method using a photoplethysmographic system, comprising:
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releasably interconnecting a photoplethysmographic sensor to a photoplethysmographic monitor, wherein a first pair of terminals on said sensor is connected for receiving first drive signals from said monitor for illuminating a first light source coupled between said first pair of terminals, wherein a second pair of terminals on said sensor is connected for receiving second drive signals from said monitor for illuminating a second light source coupled between said second pair of terminals, wherein a third pair of terminals on said sensor is connected for receiving an interrogation signal from said monitor for application across an identification element coupled between said third pair of terminals; and wherein said first, second, and third pairs of terminals each utilize a unique combination of terminals and wherein each said first, second, and third pairs of terminals share at least one terminal with another of said first, second, and third pairs of terminals; applying a first interrogation signal to a terminal shared by two of said pairs of terminals to obtain a first output signal across one of said two pairs of terminals; applying a second interrogation signal across the other of said two pairs of terminals to obtain a second output signal at said shared terminal; applying a third interrogation signal across at least one of said first and second pairs of terminals to obtain a third output signal from at least one of said first and second light sources; and utilizing at least one of said first, second and third output signals to identify said sensor.
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Specification