Signal generator based on inductance characteristics of element, electric shearing tool, and shear opening degree control method for electric shearing tool

A shear opening degree control method for an electric shearing tool, wherein the shear opening degree control method comprises:

• in a first step, controlling a blade travel control member to move in a forward direction, a reverse direction, or alternately in a forward direction and a reverse direction along a designated path, so that a relative position between an inductance type transducer and a triggering member changes;
• in a second step, generating, by the inductance type transducer, a corresponding inductance value according to the relative position of the triggering member;
• in a third step, obtaining, by a control processor, the inductance value of the inductance type transducer, determining a current movement position of the blade travel control member according to the inductance value, determining a current relative position between the triggering member and the inductance type transducer, and outputting a control signal corresponding to a position of the blade travel control member to an electric drive member of an electric drive component according to determined position information;
• and
• in a fourth step, driving, by the electric drive component, blades to reach designated positions, and changing a shear opening degree formed by a first blade and a second blade.

An electric shearing tool, comprising an electric shearing tool main body, wherein the electric shearing tool main body is provided with:

• a first blade and a second blade cooperating with each other for shearing, wherein the first blade and the second blade cooperate with each other to shear an object to be sheared;
• an electric drive component, wherein the electric drive component at least drives one blade to adjust a shear opening degree formed by the first blade and the second blade;
• a blade travel control member, wherein the blade travel control member moves in a reciprocating manner according to a designated path to achieve forward and reverse movements;
• a triggering member;
• an inductance type transducer;
• and
• a control processor, configured to receive an inductance value generated by the inductance type transducer and control a drive distance and drive direction of the electric drive component to the blades according to the inductance value,
• wherein the triggering member or the inductance type transducer is mounted on the blade travel control member;
• when the blade travel control member moves along the designated path, the blade travel control member drives the triggering member or the inductance type transducer to change a relative position between the triggering member and the inductance type transducer, so that the inductance type transducer inducts changes of the inductance value generated by the triggering member.