EXHALATION MEASUREMENT DEVICE AND CONTROL METHOD THEREFOR

摘要

Certain implementations relate to an exhalation measurement device that is used in checking pulmonary function, diagnosing asthma, and may perform zero point correction accurately even when there is disturbance. The exhalation measurement device may comprise a flow regulator. The flow regulator comprises a first offset adjuster that puts an exhalation inflow component and an exhalation outflow component in a separated state and performs first offset adjustment of an inflow pressure sensor and an outflow pressure sensor, a voltage difference detector that puts the exhalation inflow component and the exhalation outflow component in a linked state and detects an output voltage difference after the first offset adjustment of the inflow pressure sensor and the outflow pressure sensor, and a second offset adjuster that uses the output voltage difference to perform second offset adjustment of the inflow pressure sensor.

主权项

1. An exhalation measurement device, comprising:
a handle component into which a user exhales; a flow regulator that is provided downstream from the handle component and adjusts a flow of exhalation blown in from the handle component; a chamber that is provided downstream from the flow regulator and temporarily stores the flow of exhalation; an opening component that is provided near the chamber and opens up the flow regulator to atmospheric pressure; a measurement component that measures a specific component in the flow of exhalation; and a pump that is provided downstream from the chamber and sends the flow of exhalation into the measurement component, wherein the flow regulator has: an exhalation inflow component where the flow of exhalation flows in from a handle component side; an exhalation outflow component where the flow of exhalation flows out to a chamber side; a flow adjuster that is provided between the exhalation inflow component and the exhalation outflow component and adjusts the flow of exhalation; a driver that drives the flow adjuster; an inflow pressure sensor that senses a pressure of the exhalation inflow component and is disposed on an exhalation inflow component side of the flow adjuster; an outflow pressure sensor that senses a pressure of the exhalation inflow component and is disposed on an exhalation outflow component side of the flow adjuster; and a controller that controls the driver, and the controller having: a first offset adjuster that causes the driver to drive the flow adjuster and create a separated state between the exhalation inflow component and the exhalation outflow component, and performs first offset adjustment of the inflow pressure sensor and the outflow pressure sensor; a voltage difference detector that causes the driver to drive the flow adjuster and create a linked state between the exhalation inflow component and the exhalation outflow component, and detects an output voltage difference after the first offset adjustment of the inflow pressure sensor and the outflow pressure sensor; and a second offset adjuster that uses the output voltage difference to perform second offset adjustment of the inflow pressure sensor.