Controlling Method for Ultra-sound Sensor

• US 20110122729A1
• Filed: 03/15/2010
• Published: 05/26/2011
• Est. Priority Date: 11/20/2009
• Status: Active Grant

• Current Assignee: Lite-On Technology Corporation
• Original Assignee: Lite-On It Corporation (Lite-On Technology Corporation)
• Inventors: HU, Chao-Wen, Lee, Yi-Chung
• Granted Patent: US 8,483,012 B2
• Time in Patent Office: Days
• US Class Current: 367/98
• CPC Class Codes: G01S 15/04 Systems determining presence of a target
• CPC Class Codes: G01S 7/52004 Means for monitoring or calibrating short-range imaging G01S7/5205
• CPC Class Codes: G01S 7/524 Transmitters

Abstract

A controlling method for ultra-sound sensor is provided. The method includes the steps of measuring a distance of an obstacle, determining whether the distance is smaller than a distance threshold, and adjusting a driving voltage if the distance is smaller than the distance threshold.

Claims

1. A controlling method used in an ultra-sound sensor, the method comprising:

measuring a distance between an obstacle and the ultra-sound sensor;

determining whether the distance is smaller than a distance threshold; and

stepping down a driving voltage of the ultra-sound sensor if the distance is smaller than the distance threshold.

2. The method according to claim 1, wherein, the step of stepping down the driving voltage of the ultra-sound sensor comprises:

stepping down an intensity of an ultra-sound signal emitted from the ultra-sound sensor to shorten a reverberation time of the ultra-sound sensor.

3. The method according to claim 1, further comprising:

maintaining the driving voltage of the ultra-sound sensor if the distance is larger than or equal to the distance threshold.

4. A controlling method used in a first ultra-sound sensor and a second ultra-sound sensor, the method comprising:

measuring a distance between an obstacle and the first and the second ultra-sound sensors;

determining whether the distance is smaller than a distance threshold; and

boosting a driving voltage of the first and the second ultra-sound sensor if the distance is smaller than the distance threshold.

5. The method according to claim 4, further comprising:

maintaining the driving voltage of the first and the second ultra-sound sensor if the distance is larger than or equal to the distance threshold.

6. A controlling method for an ultra-sound sensor, comprising:

measuring a distance of an obstacle;

determining whether the distance is smaller than a distance threshold; and

adjusting a driving voltage if the distance is smaller than the distance threshold.

7. The method according to claim 6, wherein the step of measuring the distance of the obstacle further comprises:

measuring the distance between the obstacle and a first ultra-sound sensor.

8. The method according to claim 7, wherein the step of adjusting the driving voltage further comprises:

stepping down the driving voltage of the first ultra-sound sensor.

9. The method according to claim 6, wherein the step of measuring the distance of the obstacle further comprises:

measuring the distance between the obstacle and first and second ultra-sound sensors.

10. The method according to claim 9, wherein, the step of adjusting the driving voltage further comprises:

boosting the driving voltage of the first and the second ultra-sound sensors.

11. The method according to claim 6, further comprising:

maintaining the driving voltage if the distance is larger than or equal to the distance threshold.