Blade-heatable electric scissors and control method

A control method for blade-heatable electric scissors, characterized in that the control method comprises the following steps:

• step I, firstly, arranging a heating sheet (4) and a temperature sensor (5) on a first blade (2), rotating around a scissors shaft (6), at a front end of a scissors main body (21) of the electric scissors (1);
• embedding the heating sheet (4) tightly into a blade body of the first blade (2);
• arranging the temperature sensor (5) near the heating sheet (4) so as to be tightly attached to the blade body;
• arranging a power circuit, wherein the power circuit provides three types of power for the electric scissors:
• a first type of power is DC3V or DC5V power for operation of a single chip microcomputer U1, a blade heating temperature adjustment circuit, a heating sheet drive circuit and a blade temperature detection circuit, a second type of power is DC12V power for operation of a cutting electric motor in the scissors main body (21), and a third type of power is DC28-60V power VCC for operation of the heating sheet (4);
• step II, arranging a single chip microcomputer U1, and loading a startup preheating program module (101), a blade temperature detection program module (102), a cutting time setting program module (103), a PWM drive program module (104), an operation state indicator light program module (105), a temperature over-limit alarm program module (106), a reference temperature correction program module (107) and a cutting early-heating program module (108) in a program memory (100) of the single chip microcomputer U1, wherein each program module may be loaded and run by a processor (110);
• step III, then connecting the heating sheet (4) and the temperature sensor (5) to the heating sheet drive circuit and the blade temperature detection circuit through a conduction cable (20) respectively, wherein a drive end PWM1H of the heating sheet drive circuit is connected to one output pin of the single chip microcomputer U1, and an output end TEM of the blade temperature detection circuit is connected to one input pin of the single chip microcomputer U1;
• step IV, next arranging a blade heating temperature adjustment circuit, wherein a slide point of a potentiometer VER1 in the circuit is connected to one input pin of the single chip microcomputer U1;
• step V, switching on a startup switch (11) on the scissors main body (21) when cutting is ready to start, running the startup preheating program module (101), the blade temperature detection program module (102), the cutting time setting program module (103) and the operation state indicator light program module (105) by the single chip microcomputer U1, at this moment, heating the first blade (2) to a preheated state, detecting a preheated temperature by the blade temperature detection program module (102), and determining whether cutting may be performed according to an illumination state of the indicator light (10);
• step VI, pulling a trigger (9) when cutting is performed to trigger a first pin ED of the single chip microcomputer U1, running the cutting early-heating program module (108) by the single chip microcomputer U1, rapidly heating the first blade (2) to a cutting high temperature state, ejecting a shearing drive rod (7) under drive of the shearing electric motor according to control of the cutting time setting program module (103), driving the first blade (2) to perform cutting by a shearing drive shaft (8), and after cutting is completed, stopping the cutting high temperature state of the first blade (2) by the cutting time setting program module (103) and returning to a preheated state;
• step VII, when a reference of the preheated state and a reference of the cutting high temperature state need to be adjusted in a use process due to a geographic latitude difference, an environment temperature difference and a sheared material difference, rotating the potentiometer VER1 in the blade heating temperature adjustment circuit, running the reference temperature correction program module (107), and raising or lowering the reference;
• and
• step VIII, if a heating temperature exceeds a maximum limit during use, turning on the indicator light (10) by the temperature over-limit alarm program module (106) to rapidly flash, and stopping the operation of the electric scissors.