Magnetic field detection circuit topology structure

The utility model relates to the field of application technologies suitably used for AGV magnetic stripe detection and magnetic stripe marking information detection and discloses a magnetic field detection circuit topology structure. One end of a resistor is connected to a reference ground. The other end of the resistor and one end of a PNI magnetic flux sensor are both connected with the input end of a Schmitt trigger. The other end of the PNI magnetic flux sensor is connected with the output end of the Schmitt trigger. Signals are output through the output end of the Schmitt trigger. The magnetic field detection circuit topology structure which is structurally simple adopts common and cheap devices. The output signals are frequency signals which are in a linear relation with magnetic field intensity. The output signals can be directly received and processed through a control chip or acquired and processed through a frequency division circuit or an F/V conversion circuit so that the magnetic field intensity