Traffic sensor with adjustable light field range and high-efficiency emission

The invention discloses a traffic sensor capable of adjusting a light field range and having high-efficiency emission. The traffic sensor comprises a light field modulation circuit. The light field modulation circuit comprises a light field switch, the light field switch enables the electronic switch assembly to open or close individual light emitting units in the light emitting part, the multiple light emitting units can individually project light beams of different angles to the emitting convex lens, and the convex lens radiates light fields of different angles to the front of the automatic passing door based on the optical principle. The light field switch can flexibly modulate the width and depth of the light field in front of the automatic passing door. In addition, the light receiving parts and the spaced light emitting parts are arranged in the same direction, light reflected by the light field in the passing range is focused to the light receiving unit through the light receiving convex lens, reflecte