Wheel fixing unit for car sensor calibration and calibration device using the same
A wheel fixing unit includes: a body; a plurality of wheel connectors protruding forward from the body and connected to a tool connection hole in a wheel of a vehicle; and a cable connector protruding rearward from the body and including a connection terminal formed on a protruding end side such that a cable is connectable thereto. A calibration device using the wheel fixing unit includes: wheel fixing units respectively coupled to left and right wheels of a vehicle; a target board installed spaced apart in a direction corresponding to a vehicle body and configured such that a transmission signal of a sensor mounted on a front or rear surface of the vehicle body is reflected by a reflector and is incident on the sensor; and an interval maintaining cable connected to one end of the wheel fixing unit and one of the both sides of the target board.
1. A wheel fixing unit for a vehicle sensor calibration, the unit comprising:
a body;
a plurality of wheel connectors protruding forward from the body and connected in a state of being inserted into a tool connection hole formed in a wheel of a vehicle; and
a cable connector protruding rearward from the body and including a connection terminal formed on a protruding end side such that a cable is connectable thereto,
wherein each of the wheel connectors has a cylindrical shape having a hollow portion opened forward, and
wherein the cylindrical shape comprises:
a plurality of ring-shaped grooves formed along a circumference on outer peripheries of the cylindrical shape; and
a plurality of ring-shaped packings having an elastic force to contact an inner periphery of the tool connection hole, and coupled to the groove.
2. The wheel fixing unit of claim 1 , wherein the cylindrical shape comprises a plurality of concave slits having a length along a longitudinal direction, and formed on outer peripheries of the cylindrical shape.
3. The wheel fixing unit of claim 1 , wherein a front end of the cable connector is inserted in male-female correspondence with respect to a rear surface of the body and is locked rotatably around a horizontal center of rotation.
4. A calibration device using a wheel fixing unit for a vehicle sensor calibration, the calibration device comprising:
wheel fixing units respectively coupled to left and right wheels of a vehicle;
a target board installed spaced apart in a direction corresponding to a vehicle body and configured such that a transmission signal of a sensor mounted on a front or rear surface of the vehicle body is reflected by a reflector and is incident on the sensor; and
an interval maintaining cable connected to one end of the wheel fixing unit and one of the both sides of the target board and maintaining a distance between the vehicle body and the target board to a set interval,
wherein the vehicle fixing unit comprises:
a body;
a plurality of wheel connectors protruding forward from the body and connected in a state of being inserted into a tool connection hole formed in a wheel of a vehicle; and
a cable connector protruding rearward from the body and including a connection terminal formed on a protruding end side such that a cable is connectable thereto,
wherein each of the wheel connectors has a cylindrical shape having a hollow portion opened forward, and
wherein the cylindrical shape comprises:
a plurality of ring-shaped grooves formed along a circumference on outer peripheries of the cylindrical shape; and
a plurality of ring-shaped packings having an elastic force to contact an inner periphery of the tool connection hole, and coupled to the groove.
5. The calibration device of claim 4 , wherein the cylindrical shape comprises a plurality of concave slits having a length along a longitudinal direction, and formed on outer peripheries of the cylindrical shape.
6. The calibration device of claim 4 , wherein a front end of the cable connector is inserted in male-female correspondence with respect to a rear surface of the body and is locked rotatably around a horizontal center of rotation.
7. The wheel fixing unit of claim 1 , wherein the body has a disc-shape.
8. The wheel fixing unit of claim 7 , wherein the wheel connectors are circularly disposed on the disc-shape body.
9. The wheel fixing unit of claim 4 , wherein the body has a disc-shape.
10. The wheel fixing unit of claim 9 , wherein the wheel connectors are circularly disposed on the disc-shape body.