| 摘要 |
Provided is a sensor module for an abrasion sensing device of a brake lining that can detect a variation in inductance value to prevent the detection performance from being deteriorated due to surrounding environment, including a reception board having a detection coil, of which the inductance value is varied by rotation of a coupler of the abrasion sensing device for the brake lining, integrally formed on the top surface by a conductive metal; a transmission board positioned below the reception board, integrally coupled to the reception board, and having a detection coil, from which an electromotive force is generated by application of power, integrally formed on the top surface by a conductive metal; a protective board positioned on the reception board, integrally coupled to the reception board, and having a shield film integrally formed on the top surface in a shape corresponding to the shape of the detection coil to prevent the inductance value of the detection coil being varied as a metal other than the coupler approaches; an intermediate board positioned below the transmission board, integrally coupled to the transmission board, and provided integrally with a transmission line connected to the reception board and the transmission board; and a base board positioned below the intermediate board, integrally coupled to the intermediate board, and having a control circuit for computing a rotation angle of the coupler by use of the variation in the inductance value detected by the detection coil of the reception coil and applying the power of preset frequency to the transmission coil of the transmission board. |
