Pressure sensor disconnect detection for a blood treatment device
AssigneeCHF Solutions, Inc.
InventorsJohn O'Mahony, Mark Gelfand, Edwin Merrick, Jayne Merrick
Life of this patent
Estimating the term…
Abstract
A system is disclosed for detecting an electrical sensor, the system includes a sensor signal processing circuit further comprising an input port to receive a connector including the output signal lines of the sensor, a resistor connected to the output signal line of said input port, wherein the resistor is connected to a predetermined voltage; a sensor circuit having a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-resistor, and the sensor signal processing circuit detects an unconnected sensor based on the voltage applied by the resistor.
Claims21
A system for detecting an electrical sensor comprising:
- a sensor signal processing circuit further comprising an input port to receive a connector, wherein the input port is connected to a resistor and the resistor is connected to a predetermined voltage level;
- a sensor circuit further comprising a connector adapted to connect to the input port of the sensor signal processing circuit, wherein the sensor circuit has a resistance substantially less than the resistor, and
- wherein the sensor signal processing circuit detects an unconnected sensor based on a voltage applied by the resistor to the sensor signal processing circuit.
A system for detecting an electrical sensor circuit comprising:
- a sensor signal processing circuit further comprising an input port, a signal line connecting the input port to the processing circuit, a pull-up resistor connected between the input port and a predetermined voltage, wherein said signal line is connected to an amplifier;
- a sensor circuit comprising a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-up resistor, and
- wherein the sensor signal processing circuit detects an unconnected sensor based on the amplification of the voltage being outside a preset limit.
A system for detecting an electrical sensor circuit comprising:
- a sensor signal processing circuit further comprising an input to receive a connector to an output of the sensor circuit, a signal line connecting the input to the processing circuit, and a resistor connected between a signal line and a predetermined voltage;
- the sensor circuit comprising a connector adapted to connect to the input, wherein the sensor circuit has a resistance substantially less than the resistor, and
- wherein the sensor signal processing circuit detects an unconnected sensor circuit based on the voltage being outside a predetermined limit.
Dependencies are inferred from the claim text.