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US 10,852,130 B2Granted
Proximity sensing systems and methods
AssigneeSz Dji Technology Co., Ltd.
InventorsWancheng Zhou, Liming Huang
Life of this patent
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Abstract
An ultrasonic sensing system includes an ultrasonic receiver configured to receive an ultrasonic signal and a gain-adjustable amplifier operably coupled to the ultrasonic receiver. The gain-adjustable amplifier is configured to amplify the ultrasonic signal according to a variable gain determined based at least in part on a value of a timer that corresponds to a measuring distance.
Claims19
An ultrasonic sensing system comprising:
- an ultrasonic receiver configured to receive an ultrasonic signal;
- and
- a gain-adjustable amplifier operably coupled to the ultrasonic receiver and configured to amplify the ultrasonic signal according to a variable gain determined based at least in part on a value of a timer that corresponds to a measuring distance;
- an attenuator circuit configured to attenuate the ultrasonic signal;
- and
- a switch configured to:
- electrically couple the gain-adjustable amplifier to the receiver through the attenuator circuit during a predetermined period of time after a transmission of a transmitting signal;
- and
- electrically couple the gain-adjustable amplifier directly to the receiver prior to and after the predetermined period of time.
6 more elements
A method for ultrasonic sensing comprising:
- receiving an ultrasonic signal;
- amplifying the ultrasonic signal according to a variable gain determined based at least in part on a value of a timer that corresponds to a measuring distance;
- attenuating the ultrasonic signal before amplifying in response to the ultrasonic signal being received during a predetermined period of time after a transmission of a transmitting signal;
- and
- directly amplifying the ultrasonic signal in response to the ultrasonic signal being received prior to or after the predetermined period of time.
2 more elements
A method for ultrasonic sensing comprising:
- receiving an ultrasonic signal;
- amplifying the ultrasonic signal according to a variable gain determined based at least in part on a value of a timer that corresponds to a measuring distance;
- and
- attenuating the ultrasonic signal before amplifying in response to the ultrasonic signal being received during a predetermined period of time after a transmission of a transmitting signal.
1 more element
Dependencies are inferred from the claim text.