PRE-CRASH SAFETY SYSTEM


  1. Millimeter Wave Radar Sensor Assembly


    1. The millimeter wave radar sensor assembly consists of a millimeter wave radar circuit, signal processing circuit and CPU.

    2. The millimeter wave radar outputs waves when the vehicle speed is above 0 km/h (0 mph), and not when the vehicle speed is at 0 km/h (0 mph).* The millimeter wave radar uses frequencies in the 76 GHz band.

    3. The reception antennas receive the millimeter wave radar waves that have been reflected.

    4. The signal processing circuit detects the distance, relative speed, and the direction of the object by generating millimeter wave radar waves and calculating the signals received by the reception antennas. Then, it transmits this information to the driving support ECU assembly.

      Tech Tips

      *: The setting with which electric waves stop while the vehicle is stopped differs depending on the destinations.

  2. Forward Recognition Camera (Camera Sensor)


    1. Pre-crash safety is equipped with an internal monocular camera.

    2. 2 types of sensors such as the millimeter wave radar sensor and a monocular camera are used to ensure accurate and reliable detection.

    3. Pre-crash safety, if there is a problem with the signal from the millimeter wave sensor cannot be operated only ancillary even on camera signal.

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      *1 Forward Recognition Camera (Camera Sensor) - -
      *a Monocular Camera *b Detection Area

  3. Camera Heater


    1. Operating Condition


      1. When all of the following conditions have been met, the camera heater (forward recognition hood with heater sub-assembly) operates.


        • The ignition switch is turned to ON.

        • The outside air temperature is approximately 10°C or less.

        • A few minutes have elapsed since the camera heater (forward recognition hood with heater sub-assembly) operation stopped.

      2. After the camera heater (forward recognition hood with heater sub-assembly) operates, the operation will stop when a certain length of time has elapsed.

        Tech Tips

        Operating time will differ depending on vehicle conditions (vehicle speed, outside air temperature, etc.).

    2. Construction


      1. The camera heater (forward recognition hood with heater sub-assembly) is composed of the sheet heater (heating element) and temperature fuse, etc. Current is run through the sheet heater (heating element) to generate heat and warm the front portion of the forward recognition camera (camera sensor).

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        *1 Sheet Heater (Heating Element) *2 Temperature Fuse
        Heater Specifications
        Item Specification
        Heat Generation 5 W or less