Torque measuring device and manufacturing method thereof

The invention provides a torque measuring device and a manufacturing method thereof capable of suppressing manufacturing time. A plurality of test samples having the same configuration as a torque measuring device to be manufactured are provided. A test is performed for checking the coil balance (Cb), which is the ratio of the product (R1 * R3) of the resistance values of one pair of opposite sides constituting the bridge circuit (8) to the product (R2 * R4) of the resistance values of the two opposite sides constituting the other pair of opposite sides, and the temperature change rate (VT) of the output voltage (Vo) caused by the temperature variation of the sensor unit (4). The relationship (X) between the coil balance (Cb) and the temperature change rate (VT) is acquired, and the temperature change rate (VT) is calculated from the relationship (X) using the coil balance (Cb) obtained by measuring the resistance values (R1-R4) of the four sides of the bridge circuit for the torque measurement device to be m