Vacuum cleaner and method for controlling thereof
A vacuum cleaner is provided. The vacuum cleaner includes a main body and a front detection sensor disposed to face forward in a suction head coupled to one end of a connection pipe extending from the main body, configured to transmit a forward signal, and receive a signal reflected from an obstacle located in a forward signal area by the forward signal, so as to detect the obstacle. The front detection sensor includes a transmission unit configured to transmit a first forward signal for detecting an obstacle located in a first signal area, and a second forward signal for detecting an obstacle located in a second signal area included in the first signal area, thereby diffusing the transmitted forward signals.
1 . A vacuum cleaner comprising:
a main body; and
a front detection sensor facing forward and disposed on a suction head coupled to one end of a connection pipe extending from the main body,
wherein the front detection sensor is configured to:
transmit a forward signal, and
receive a signal reflected from an obstacle located in a forward signal area by the forward signal so as to detect the obstacle,
wherein the front detection sensor includes a transmitter configured to:
transmit a first forward signal for detecting obstacles located in a first signal area, and
transmit a second forward signal for detecting obstacles located in a second signal area included in the first signal area, thereby diffusing the first forward signal and the second forward signal,
wherein the second forward signal has a second amplitude and the first forward signal has a first amplitude greater than the second amplitude, and
wherein the first forward signal forms a wider signal area than the second forward signal.
2 . The vacuum cleaner of claim 1 , wherein the transmitter includes:
a light emitter configured to transmit the first forward signal and the second forward signal; and
a diffuser configured to diffuse the first forward signal and the second forward signal transmitted from the light emitter.
3 . The vacuum cleaner of claim 2 , wherein the diffuser includes a first lens having a predetermined refractive index.
4 . The vacuum cleaner of claim 3 , wherein a groove for inserting the light emitter is provided inside the first lens.
5 . The vacuum cleaner of claim 2 , wherein the diffuser includes a first reflection plate having a predetermined reflection angle.
6 . The vacuum cleaner of claim 1 , wherein the front detection sensor further includes at least one receiver including a lens configured to concentrate a signal reflected from the obstacle onto the at least one receiver.
7 . The vacuum cleaner of claim 1 , wherein the front detection sensor further includes at least one receiver including a reflection plate configured to concentrate a signal reflected from the obstacle onto the at least one receiver.
8 . The vacuum cleaner of claim 1 ,
wherein the front detection sensor further includes a first receiver and a second receiver,
wherein the front detection sensor further includes a separation wall arranged to separate a signal incident on the first receiver from a signal incident on the second receiver, and
wherein the separation wall is disposed between the first receiver and the second receiver.
9 . The vacuum cleaner of claim 1 , further comprising:
a controller configured to:
increase a rotation speed of a suction motor or a brush motor, based on the obstacle being detected in the forward signal area; and
decrease the rotation speed of the suction motor or the brush motor, based on no obstacle being detected in the forward signal area.
10 . The vacuum cleaner of claim 1 , further comprising:
a controller configured to actuate a light or a vibrator, based on the obstacle being detected in the forward signal area.
11 . The vacuum cleaner of claim 1 , wherein the first forward signal and the second forward signal have different patterns between a leading signal and an ending signal.
12 . The vacuum cleaner of claim 1 , further comprising:
a controller configured to control a suction motor or a brush motor so that a rotation speed of the suction motor or the brush motor increases from a first rotation speed to a second rotation speed, based on the obstacle being detected in the first signal area.
13 . The vacuum cleaner of claim 12 , wherein the controller is further configured to control the suction motor or the brush motor so that the rotation speed of the suction motor or the brush motor increases from the second rotation speed to a third rotation speed, based on the obstacle being detected in the second signal area.
14 . The vacuum cleaner of claim 1 , further comprising:
a rear detection sensor facing backward in the connection pipe,
wherein the rear detection sensor is configured to:
transmit a backward signal, and
receive a signal reflected from a user located in a backward signal area by the backward signal so as to detect the user.
15 . The vacuum cleaner of claim 14 , further comprising:
a controller configured to control a rotation speed of a suction motor or a rotation speed of a brush motor, based on the signal reflected from the user.
16 . The vacuum cleaner of claim 15 , wherein the controller is further configured to control to:
decrease the rotation speed of the suction motor or the rotation speed of the brush motor, based on the signal reflected from the user being detected; and
increase the rotation speed of the suction motor or the rotation speed of the brush motor, based on no signal reflected from the user being detected.