Controlling method for ultra-sound sensor
View Patent ↗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.
1. A controlling method used in an ultra-sound sensor, the method comprising:
driving the ultra-sound sensor to emit an ultra-sound wave for sensing an obstacle;
measuring a distance between the obstacle and the ultra-sound sensor;
determining whether the distance is smaller than a distance threshold; and
stepping down the 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:
driving the ultra-sound sensor to emit an ultra-sound wave for sensing an obstacle;
measuring a distance between the obstacle and the first and the second ultra-sound sensors;
determining whether the distance is smaller than a distance threshold; and
boosting the 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:
driving the ultra-sound sensor to emit an ultra-sound wave for sensing an obstacle;
measuring the distance of an obstacle;
determining whether the distance is smaller than a distance threshold; and
adjusting the driving voltage of the ultra-sound sensor 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.