Cleaning apparatus for sensor

1. A sensor apparatus comprising:

a LIDAR sensor;

a camera having a field of view encompassing a volume directly forward of the LIDAR sensor;

a nozzle aimed at least partially upward and positioned forward of the LIDAR sensor; and

a computer programmed to increase output from the nozzle upon determining that an object is traveling rearward through the field of view relative to the LIDAR sensor based on data received from the camera.

2. The sensor apparatus of claim 1 , further comprising a housing to which the LIDAR sensor, the camera, and the nozzle are mounted.

3. The sensor apparatus of claim 2 , wherein the housing includes a chamber, and the nozzle is fluidly connected to the chamber.

4. The sensor apparatus of claim 3 , further comprising a pressure source fluidly connected to the chamber, wherein increasing output from the nozzle includes instructing the pressure source to increase output above a default output.

5. The sensor apparatus of claim 4 , wherein the default output of the pressure source is greater than zero.

6. The sensor apparatus of claim 2 , wherein the nozzle is a first nozzle, the sensor apparatus further comprising a plurality of second nozzles mounted to the housing and positioned to provide an air curtain across the LIDAR sensor.

7. The sensor apparatus of claim 6 , wherein the first nozzle is at least five times farther from the LIDAR sensor than the second nozzles are.

8. The sensor apparatus of claim 6 , wherein the housing includes a chamber, and the first nozzle and second nozzles are fluidly connected to the chamber.

9. The sensor apparatus of claim 2 , wherein the housing is contoured to attach to a vehicle roof.

10. The sensor apparatus of claim 1 , further comprising a valve controlling flow to the nozzle, wherein the valve is switchable between a closed position and an open position.

11. The sensor apparatus of claim 10 , wherein increasing output from the nozzle includes switching the valve from the closed position to the open position.

12. The sensor apparatus of claim 1 , wherein the computer is further programmed to classify the object based on the data received from the camera, and to increase output from the nozzle upon determining that the object is traveling through the volume and that the object is classified as being of a type in a first set of types of object.

13. The sensor apparatus of claim 12 , wherein the computer is further programmed to refrain from increasing output from the nozzle upon determining that the object is classified as being of a type in a second set of types of object.

14. The sensor apparatus of claim 1 , wherein the computer is further programmed to decrease output from the nozzle at a preset time period after increasing output of the nozzle.

15. The sensor apparatus of claim 1 , wherein the camera is aimed partially upward and partially forward.

16. The sensor apparatus of claim 1 , wherein the LIDAR sensor has a 360° horizontal field of view.