Collision detection sensor for vehicle

A collision detection sensor for detecting a collision of a vehicle with an object, the collision detection sensor comprising:

• a bumper reinforcement extending in a vehicle left-right direction;
• a bumper cover located to cover space ahead of the bumper reinforcement in a vehicle front-rear direction, the bumper cover being configured to move toward a vehicle rear direction relative to the bumper reinforcement in the event of the collision;
• a chamber member defining a chamber room therein and located between the bumper reinforcement and the bumper cover, the chamber room being deformed with the relative movement of the bumper cover to the bumper reinforcement;
• a movable member configured to move with the relative movement of the bumper cover to the bumper reinforcement;
• a pressure sensor configured to detect a pressure change in the chamber room;
• a touch sensor located ahead of the bumper reinforcement in the vehicle front-rear direction and detecting contact with the movable member, the touch sensor and the chamber room being located at different positions in a vehicle top-bottom direction;
• and
• a determination circuit that determines whether the collision occurs based on the detection results of the pressure sensor and the touch sensor.