The residual magnetic induction intensity of the knob lock

- Jul 14, 2018-

The residual magnetic induction intensity Br on the magnetic card plays a decisive role in the work of the magnetic card. The magnetic card passes the working head with the coil at a certain speed, the external magnetic line of force of the magnetic card cuts the coil, and the induction electromotive force is generated in the online circle, thus transmitting the recorded signal. Of course, it is also required that the recorded signals in the magnetic card work have wider frequency response, smaller distortion and higher output level.