Vertical alignment device and method for vehicle radar
Provided are a vertical alignment apparatus and method for a vehicle radar. The vertical alignment apparatus includes a case at which a shaft is formed, an antenna that is coupled with the shaft and is disposed to be rotatable about the shaft in a vertical direction, an antenna rotary member that rotates the antenna, and a stopper that limits an angle of rotation of the antenna.
1. A vertical alignment apparatus for a vehicle radar comprising:
a case at which a shaft is formed;
an antenna coupled with the shaft and disposed to be rotatable about the shaft in a vertical direction;
an antenna rotary member rotating the antenna; and
a stopper limiting an angle of rotation of the antenna,
wherein:
the antenna rotary member displaces one side of the antenna upward or downward so as to rotate the antenna; and
the stopper is disposed away from a lower portion of the other side of the antenna and limits the rotation of the antenna.
2. The vertical alignment apparatus according to claim 1 , wherein the antenna rotary member includes:
a vertical motion part that is in contact with a lower portion of the one side of the antenna and is movable in a vertical direction; and
a motor that drives the vertical motion part.
3. The vertical alignment apparatus according to claim 1 , further comprising an elastic member, one side and the other side of which are respectively coupled with the antenna and the case and which supports the antenna.
4. The vertical alignment apparatus according to claim 3 , wherein the one side of the elastic member is coupled with the antenna in the vicinity of the shaft.
5. The vertical alignment apparatus according to claim 1 , wherein a point at which the other side of the antenna comes into contact with the stopper when the antenna rotary member displaces the one side of the antenna upward is set as a zero point for vertical alignment of the antenna.
6. The vertical alignment apparatus according to claim 5 , wherein, after the zero point for the vertical alignment of the antenna is set, the antenna rotary member performs the vertical alignment of the antenna based on the zero point.
7. A vertical alignment method for a vehicle radar having an antenna that is rotatable about a shaft formed at a case in a vertical direction, the vertical alignment method comprising:
a step of displacing one side of the antenna upward;
a step of stopping rotation of the antenna;
a step of setting a point at which the rotation of the antenna is stopped as a zero point for vertical alignment; and
a step of performing the vertical alignment of the antenna based on the zero point,
wherein the step of stopping rotation of the antenna includes stopping the rotation of the antenna by means of a stopper that is disposed away from a lower portion of the other side of the antenna and limits the rotation of the antenna.
8. The vertical alignment method according to claim 7 , wherein the one side of the antenna is displaced upward or downward by an antenna rotary member that is in contact with a lower portion of the one side of the antenna.
9. The vertical alignment method according to claim 7 , wherein the step of performing the vertical alignment of the antenna includes performing the vertical alignment based on power of reflected waves which the antenna receives.
10. A vertical alignment method for a vehicle radar having an antenna that is rotatable about a shaft formed at a case in a vertical direction, the vertical alignment method comprising:
a step of displacing one side of the antenna upward;
a step of stopping rotation of the antenna;
a step of setting a point at which the rotation of the antenna is stopped as a zero point for vertical alignment; and
a step of performing the vertical alignment of the antenna based on the zero point,
wherein the step of performing the vertical alignment of the antenna includes performing the vertical alignment based on power of reflected waves which the antenna receives, and
wherein the step of performing the vertical alignment of the antenna includes:
a step of sequentially rotating the one side of the antenna in one direction based on the zero point in units of a preset first angle;
a step of stopping the rotation of the antenna first when it is determined that an amount of rotation of the antenna exceeds an amount of rotation at which the power of the reflected waves received by the antenna reaches a maximum value;
a step of sequentially rotating the one side of the antenna in another direction in units of a second angle smaller than the first angle; and
a step of stopping the rotation of the antenna when a difference between a value of the power of the reflected waves received by the antenna and a maximum value measured in the step of stopping the rotation of the antenna first is less than or equal to a preset value.