US Pat. No. 9,377,375

REPETITIVE SHOCK VIBRATION TESTING SYSTEM AND METHOD

Venturedyne, Ltd., Pewau...

1. A method of operating a repetitive shock vibration testing system including a table configured to receive at least one
product for testing, a plurality of vibrators coupled to the table and operable to impact the table with a range of impact
strengths, and a plurality of accelerometers, the method comprising:
providing the table with a plurality of distinct regions;
providing each of the plurality of distinct regions with at least one vibrator of the plurality of vibrators and at least
one accelerometer of the plurality of accelerometers;

securing the at least one product to the table;
setting a target vibration strength for each of the plurality of distinct regions;
operating the plurality of vibrators to repeatedly impact the table to induce repetitive shock on the table and the at least
one product received by the table;

measuring local vibration strength at each of the plurality of distinct regions with the corresponding at least one accelerometer
of the plurality of accelerometers;

providing a signal corresponding to each of the measured local vibration strengths to a controller;
calculating an individual control signal for the at least one vibrator of each distinct region based on the corresponding
measured local vibration strength and the corresponding target vibration strength; and

providing the individual control signals from the controller to control the at least one vibrator of each distinct region
to achieve the target vibration strength at each of the plurality of distinct regions of the table.

US Pat. No. 9,857,285

ENVIRONMENTAL SENSOR AND METHOD OF OPERATING THE SAME

Venturedyne, Ltd., Pewau...

1. A gaseous-fluid environmental sensor, comprising:
a gaseous-fluid flow system defining a flow path coupling an intake port to an exhaust port, the gaseous-fluid flow system
including a blower and a flow sensor, the blower including a motor and the flow sensor sensing a flow-related parameter, wherein
the motor includes a motor having a fluid dynamic bearing;

a battery;
an electrical sensor sensing an electrical power-related parameter;
a controller electrically coupled to the electrical sensor, the flow sensor, and the motor, the controller being 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 being further configured to drive the motor using the
composite drive waveform.

US Pat. No. 9,983,596

ENVIRONMENTAL SENSOR AND METHOD OF OPERATING THE SAME

Venturedyne, Ltd., Pewau...

1. A gaseous-fluid environmental sensor, comprising:an inlet structure defining an inlet intake port to receive a gaseous fluid of an environmental space;
an outlet structure defining an outlet exhaust port to exhaust the gaseous fluid to the environmental space;
a gaseous-fluid flow system coupled to the inlet structure and the outlet structure, the gaseous-fluid flow system defining a flow path coupling the inlet intake port to the outlet exhaust port, the gaseous-fluid flow system including
a blower to move the gaseous fluid from the inlet intake port to the outlet exhaust port via the flow path, the blower having a blower intake port, a blower exhaust port, and a blower vent port, the blower intake port and the blower exhaust port further defining the flow path, the blower further having an air bearing, and
a flow connector including a connector intake port and a connector exhaust port, the flow connector further including a chamber in fluid communication with the connector intake port and the connector exhaust port;
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 and to control the blower based on the signal.

US Pat. No. 10,094,755

ENVIRONMENTAL SENSOR AND METHOD OF OPERATING THE SAME

Venturedyne, Ltd, Pewauk...

1. A gaseous-fluid environmental sensor, comprising:a gaseous-fluid flow system defining a flow path coupling an intake port to an exhaust port,
a particle count sensor to sense particles in the fluid and a cosmic ray;
a controller electrically coupled to the particle count sensor, the controller being configured to
store a dark count,
store a compensated particle count based on the signal from the particle count sensor and the dark count, and
determine whether the particle count sensor has a fault based on the particle count sensor not sensing a particle or a cosmic ray in a time period.

US Pat. No. 10,557,472

ENVIRONMENTAL SENSOR AND METHOD OF OPERATING THE SAME

VENTUREDYNE, LTD., Pewau...

1. A gaseous-fluid environmental sensor, comprising:a gaseous-fluid flow system defining a flow path coupling an intake port to an exhaust port, the gaseous-fluid flow system including a blower and a flow sensor, the blower including a motor and the flow sensor for sensing a flow parameter; and
a controller electrically coupled to the flow sensor and the motor, the controller being 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 being further configured to select between driving the motor with the first commutation sequence and driving the motor with the second commutation sequence based on the flow parameter, the flow parameter relating to a flow of gaseous-fluid through the flow path,
wherein the first commutation sequence is a normal commutation sequence, wherein the second commutation sequence is a brake commutation sequence, and wherein the brake commutation sequence includes multiple pulses in opposite directions.