Abstract: In one aspect, a system includes a movable barrier operator configured to open and close a movable barrier; at least one ultra-wideband device associated with the movable barrier operator and electrically configured to receive ultra-wideband radio frequency signals; and a processor operatively connected to the at least one ultra-wideband device and configured to use the ultra-wideband radio signals to determine a status of the movable barrier.

Abstract: A patient interface includes a plenum chamber pressurisable to a therapeutic pressure, and a seal-forming structure constructed and arranged to seal with a region of a patient's face surrounding an entrance to a patient's airways. The seal-forming structure is constructed and arranged to maintain the therapeutic pressure in the plenum chamber throughout a patient's respiratory cycle in use. The patient interface also includes a positioning and stabilizing structure configured to hold the seal-forming structure in a therapeutically effective position on a patients head. The positioning and stabilizing structure includes a rear strap arranged to contact an occiput of the patient's head. The rear strap is constructed from a first material is arranged to contact a temporal region of the patient's head, and a second material arranged to contact the occiput of the patients head. The second material is silicone.

Abstract: In one aspect, an object detection system is provided that adapts to the distance between the emitter and receiver. The system may utilize a range determining operation whereby the receiver will adjust an operation threshold, such as the detected signal strength required for the receiver to indicate that no object is present. The system may increase the threshold of the receiver as the strength of the received signal from the emitter increases, and upon certain conditions, decrease the threshold of the receiver as the strength of the received signal decreases. The system may utilize different receiver thresholds corresponding with different distance ranges between the emitter and receiver. By increasing the threshold of the receiver, the system may disregard low-level reflected light, thereby avoiding ignoring legitimate obstructions, while allowing the system to operate reliably over a wide physical range between the emitter and receiver.

Abstract: In one aspect, an object detection system is provided that adapts to the distance between the emitter and receiver. The system may utilize a range determining operation whereby the receiver will adjust an operation threshold, such as the detected signal strength required for the receiver to indicate that no object is present. The system may increase the threshold of the receiver as the strength of the received signal from the emitter increases, and upon certain conditions, decrease the threshold of the receiver as the strength of the received signal decreases. The system may utilize different receiver thresholds corresponding with different distance ranges between the emitter and receiver. By increasing the threshold of the receiver, the system may disregard low-level reflected light, thereby avoiding ignoring legitimate obstructions, while allowing the system to operate reliably over a wide physical range between the emitter and receiver.

Abstract: A movable barrier operator apparatus having a motor and a control system is disclosed. The motor is configured to couple to a movable barrier. The control system is configured to cause the motor to move the movable barrier by supplying power to the motor. The control system is further configured to selectively supply nonoperational power to the motor to generate heat without moving the movable barrier.

Abstract: A movable barrier operator apparatus having a motor and a control system is disclosed. The motor is configured to couple to a movable barrier. The control system is configured to cause the motor to move the movable barrier by supplying power to the motor. The control system is further configured to selectively supply nonoperational power to the motor to generate heat without moving the movable barrier.