Rotating speed signal acquisition device

The utility model discloses a rotating speed signal acquisition device, which comprises a shell, and a magnetic medium and a permanent magnet sequentially arranged inside the shell, wherein one end of the magnetic medium is connected with the permanent magnet, and the other end points at the end surface of the shell; the end surface of the shell is provided with an opening for sensing the rotating speed of an abject to be detected by the magnetic medium; an coil is arranged on the outer circumference of the magnetic medium; and the coil is a high temperature-resisting coil and both ends of the high temperature-resisting coil are respectively connected with a lead. According to the rotating speed signal acquisition device disclosed by the utility model, as the high temperature coil is used for being matched with the magnetic medium and the permanent magnet, signal acquisition can be realized in the high temperature environment; by means of the high temperature-resisting property of the high temperature coil, s