Device for measuring weight on board by measuring the angle of rotation of the leaf spring supporting shackle

A device for measuring weight on board, by measuring an angle of a shackle which is configured so that both ends thereof are respectively supported by a vehicle body and a leaf spring to be rotatable, comprising:

• a sensor mounter coupled to the shackle;
• a first motor mounted to a surface facing an open surface at the sensor mounter to have a same rotation center as a first rotation center of the shackle being connected to the vehicle body, the first motor generating torque;
• a second motor mounted to a surface facing the open surface at the sensor mounter to have a same rotation center as a second rotation center of the shackle being connected to an eye of the spring, the second motor generating torque;
• a first angle sensor rotating by receiving the generated torque of the first motor;
• and
• a second angle sensor rotating by receiving the generated torque of the second motor,
• wherein a rotation angle of the shackle about the first rotation center is measured by the first angle sensor, and a rotation angle of the shackle about the second rotation center is measured by the second angle sensor, and
• weight on board is measured depending on an amount of variation of the rotation angle of the shackle.