Venturedyne, Ltd.

Nicholas C Neander

David L Chandler

Justin F Dean

A gaseous-fluid environmental sensor having a gaseous-fluid flow system that defines a flow path coupling an intake port to an exhaust port. The gaseous-fluid flow system includes a blower and a flow sensor. The blower includes a motor and the flow sensor is for sensing a flow parameter. The gaseous-fluid environmental sensor further includes a controller electrically coupled to the flow sensor and the motor. The controller is configured to drive the motor with a first commutation sequence and to drive the motor with a second commutation sequence different than the first commutation sequence. The controller is further configured to select the first commutation sequence and the second commutation sequence based on the sensed flow parameter. Also discloses is a method for controlling the gaseous-fluid environmental sensor.

Environmental sensor and method of operating the same

A gaseous-fluid environmental sensor having a gaseous-fluid flow system. The gaseous-fluid flow system includes a blower to move the gaseous fluid from a inlet intake port to an outlet exhaust port via a flow path. The blower includes a motor, which can have a fluid dynamic bearing. The gaseous-fluid environmental sensor further includes a flow sensor to sense a parameter relating to a flow of the gaseous fluid through the flow path and provide a signal based on the parameter, and a controller coupled to the flow sensor. The controller controls the blower based on the signal.

A gaseous-fluid environmental sensor having a gaseous-fluid flow system that defines a flow path coupling an intake port to an exhaust port. The gaseous-fluid flow system includes a blower and a flow sensor. The blower includes a motor and the flow sensor senses a flow-related parameter. The gaseous-fluid environmental sensor further includes a battery, an electrical sensor sensing an electrical power-related parameter, and a controller electrically coupled to the electrical sensor, the flow sensor, and the motor. The controller is configured to generate a composite drive waveform having a first component based on the sensed flow-related parameter and a second component based on the sensed electrical power-related parameter. The controller is further configured to drive the motor using the composite drive waveform. Also disclosed is a method of controlling the gaseous-fluid environmental sensor.

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Angelus Oaks, CA, United States of America

Nicholas C Neander