Radar apparatus and vehicle

1. An object detection apparatus in a vehicle, the object detection apparatus comprising:

one or more sensors configured to detect at least one object located on at least three rows of seats in the vehicle, each of the one or more sensors being positioned on a ceiling above at least one of the at least three rows of seats in the vehicle but not above all of the at least three rows of seats; and

a circuit configured to determine whether or not the at least one object detected is a living-object,

wherein a number of the one or more sensors is less than a number of the at least three rows of seats.

2. The object detection apparatus according to claim 1 ,

wherein the circuit is further configured to determine either a start of driving of the vehicle, a restart of driving of the vehicle, and an end of driving of the vehicle, and

wherein

when the circuit determines that the start of driving of the vehicle or the restart of driving of the vehicle, the circuit instructs the one or more sensors to operate in an object sensing mode to detect a presence or an absence of the at least one object, and

when the circuit determines that the end of driving of the vehicle, the circuit instructs the one or more sensors to operate in a living-object sensing mode to detect whether or not the at least one object is the living-object.

3. The object detection apparatus according to claim 1 ,

wherein, when the circuit determines that the at least one object detected is the living-object,

the circuit instructs a vehicle control device connected to the vehicle to notify outside of the vehicle that the living-object is left in the vehicle.

4. The object detection apparatus according to claim 1 , wherein

the one or more sensors include two sensors,

the at least three rows of seats include a first row of seats, a second row of seats and a third row of seats,

a first sensor of the two sensors detects the at least one object on the first row of seats and the second row of seats from the ceiling above the first row of seats, and

a second sensor of the two sensors detects the at least one object on the third row of seats from the ceiling above the third row of seats.

5. The object detection apparatus according to claim 1 , wherein

the one or more sensors include two sensors,

the at least three rows of seats include a first row of seats, a second row of seats and a third row of seats,

a first sensor of the two sensors detects the at least one object on the first row of seats from the ceiling above the first row of seats, and

a second sensor of the two sensors detects the at least one object on the second row of seats and the third row of seats from the ceiling above the second row of seats.

6. The object detection apparatus according to claim 4 , wherein the first sensor of the two sensors detects the at least one object on the first row of seats and the second row of seats from above a driver's seat in the first row of seats.

7. The object detection apparatus according to claim 1 , wherein

the one or more sensors include one sensor, and

the one sensor has a maximum viewing angle of 160 degrees.

8. The object detection apparatus according to claim 5 , wherein

the first sensor has a concave lens.

9. The object detection apparatus according to claim 5 , wherein

the first sensor has multiple concave-convex lenses.

10. The object detection apparatus according to claim 1 , wherein

the one or more sensors include one sensor,

the at least three rows of seats include a first row of seats, a second row of seats and a third row of seats,

the one sensor detects the at least one object on the first row of seats using reflected waves from a rear-view mirror or side-view mirrors, and

the one sensor detects the at least one object on the second row of seats and the third row of seats using direct waves from the ceiling above the second row of seats.

11. The object detection apparatus according to claim 7 , wherein

the one sensor has a first direction that scans using a direct wave and a second direction that scans using a reflector, and the first direction is different from the second direction.

12. The object detection apparatus according to claim 1 , wherein

the one or more sensors have a driving circuit that changes a sensing direction.

13. The object detection apparatus according to claim 1 , wherein

the one or more sensors have a drive circuit that changes an installation position of the one or more sensors.

14. The object detection apparatus according to claim 1 , wherein

the one or more sensors include one sensor, and

the one sensor detects the at least one object on a first row of seats among the at least three rows of seats using reflected waves that are reflected from a windshield of the vehicle.

15. The object detection apparatus according to claim 1 , further comprising:

a reflector placed above a first row of seats among the at least three rows of seats,

wherein the one or more sensors include one sensor, and

the one sensor detects the at least one object located on the first row of seats using reflected waves from a reflector.

16. The object detection apparatus according to claim 1 ,

wherein the at least three rows of seats include a first row of seats, a second row of seats and a third row of seats,

the object detection apparatus further comprises a reflector placed at a top of the third row of seats,

the one or more sensors include one sensor,

the one sensor detects the at least one object on the first row of seats and the second row of seats without using reflected waves from a reflector, and

the one sensor detects the at least one object on the third row of seats using reflected waves from a reflector.

17. The object detection apparatus according to claim 1 ,

wherein the at least three rows of seats include a first row of seats, a second row of seats and a third row of seats,

the object detection apparatus further comprises one or more elongated reflectors are placed at an edge of the ceiling above the second row of seats and the third row of seats,

the one or more sensors include one sensor, and

the one sensor

detects the at least one object located on the first row of seats by using a direct wave from the ceiling above the first row of seats, and

detects the at least one object located on the second row of seats and the third row of seats by using a reflected wave that is reflected from the one or more elongated reflectors.