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US 2011/0087342 A1Published application
Ultrasonic sensor and controlling method using the same
AssigneeLite-On It Corporation
InventorsSian-Cing Liao, Yuan-Hung Liao
Life of this patent
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Abstract
A controlling method using an ultrasonic sensor is provided. Firstly, a first ringing time of the ultrasonic sensor is set when the ultrasonic sensor is in a standby status. Then, a sensing wave is transmitted, and a second ringing time is detected. Then, the second ringing time is compared with the first ringing time. If the second ringing time is not equal to the first ringing time, a function control signal is generated.
Claims16
A controlling method by using an ultrasonic sensor, the controlling method comprising steps of:
- (a) setting a first ringing time of the ultrasonic sensor when the ultrasonic sensor is in a standby status;
- (b) transmitting a sensing wave, and detecting a second ringing time;
- and
- (c) comparing the second ringing time with the first ringing time, wherein if the second ringing time is not equal to the first ringing time, a function control signal is generated.
1 more element
An ultrasonic sensor comprising:
- a pre-processing module for generating a driving signal;
- an ultrasonic transmitting/receiving module in communication with the pre-processing module for receiving the driving signal, and generating vibration and transmitting a sensing wave according to the driving signal, wherein the ultrasonic transmitting/receiving module has a first ringing time in a standby status, wherein when the sensing wave is reflected by an object to generate a reflective wave, a second ringing time required for completing a decaying course is obtained;
- and
- a microprocessor in communication with the pre-processing module for controlling the pre-processing module to generate the driving signal, and comparing the second ringing time with the first ringing time, wherein if the second ringing time is not equal to the first ringing time, the microprocessor generates a function control signal.
1 more element
Dependencies are inferred from the claim text.