Sensing device and sensing method

Abstract

The invention discloses a sensing device and a sensing method. The sensing device comprises a shell, and a bar magnet (1) and a magnetic induction element (2) which are arranged in the shell. The "0" magnetic point mid-position of the bar magnet (1) can move relative to the magnetic induction element (2) along arrangement direction of the N pole and the S pole of the bar magnet (1). The induction surface of the magnetic induction element (2) faces one side, which is parallel to the arrangement direction of the N pole and the S pole of the bar magnet (1), of the bar magnet (1). The moving stroke of the "0" magnetic point mid-position passes through the induction surface of the magnetic induction element (2). The "0" magnetic point mid-position is the position, of which magnetic induction intensity is 0 millitex, of one side along the arrangement direction from the N pole to the S pole of the bar magnet (1). According to the sensing device, rate of change of magnetic field intensity increases so that the magnetic induction element is enabled to generate a magnetic induction signal timely and accurately, and thus sensing accuracy of the sensing device is enhanced.

Description

technical field [0001] The invention relates to the technical field of sensing equipment, in particular to a sensing device and a sensing method. Background technique [0002] The magnet itself is a special substance that can cause linear motion in space. But the movement of space leads to the change of space density, and the change of space density makes the space produce diffusion movement. Then the distribution of the magnetic field lines of the external magnetic field of the magnet is generated. Such as figure 1 as shown, figure 1 It is the magnetic force line of a point magnet, but there is no point magnet in real life. And the magnetic field lines of the bar magnet 1 are as follows: figure 2 shown. [0003] The sensing principle of the magnetic induction sensor device is as follows: the relative movement of the magnet and the magnetic induction element makes the magnetic induction element sense the magnetic field lines generated by the magnet and output it as an...

AI Technical Summary

Problems solved by technology

However, in this case, the change of the magnetic field intensity is small, and it is difficult to make the magnetic induction element generate the magnetic induction signal in time and accurately, so that the sensing accuracy of the sensing device is not high.

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