| 主权项 |
1. A tunnel camera system comprising
a frame sized to fit within a tunnel; an animal detection unit that detects cold-blooded animals and small mammals traversing the tunnel, the animal detection unit including:
an elevated threshold that extends across a width of the tunnel,a photo emitter that generates a light beam, the photo emitter being located at a first end of the elevated threshold,a photoelectric receiver that receives the light beam, the photoelectric receiver located at a second end of the elevated threshold, wherein the light beam is low enough with respect to the elevated threshold that cold-blooded animals and small mammals moving over the elevated threshold are raised in height sufficiently to block the light beam as the cold-blooded animals and small mammals move over the elevated threshold; and, a camera, mounted on the frame, the camera being aimed and focused to capture visual recordings of the cold-blooded animals and small mammals as they move over the elevated threshold; wherein the photoelectric receiver sends a trigger signal when an animal blocks the light beam, the camera capturing a first visual recording of the animal when the photoelectric receiver sends the trigger signal. |
