CN112809751A - Intelligent control electric shears with any position of knife edge staying and control method thereof - Google Patents
Intelligent control electric shears with any position of knife edge staying and control method thereof Download PDFInfo
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- CN112809751A CN112809751A CN202110091626.8A CN202110091626A CN112809751A CN 112809751 A CN112809751 A CN 112809751A CN 202110091626 A CN202110091626 A CN 202110091626A CN 112809751 A CN112809751 A CN 112809751A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B15/00—Hand-held shears with motor-driven blades
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Abstract
The invention relates to the technical field of electric shears, in particular to an intelligent control electric shear with a knife edge staying at any position and a control method thereof, wherein the intelligent control electric shear comprises a shear main body, wherein the front end of the shear main body is provided with an electric shear head which is provided with a three-phase brushless direct current motor for electric drive, a circuit module for controlling the electric shear head to complete shearing action is arranged inside the shear main body, and a trigger with a magnet is arranged outside the shear main body; the intelligent control electric scissors staying at any position of the edge can define the size of the edge of the scissors according to the size of branches needing to be frequently cut in use at any time to realize the maximum use of the electric quantity of a battery and save the time of cutting the edge without cutting; when branches with the same diameter are frequently cut, the size of the knife edge of the electric shear head can be reduced through the mode, the time consumed by empty shearing is reduced, and the shearing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of electric shears, in particular to an intelligent control electric shear with an optional stay position of a knife edge and a control method thereof.
Background
The traditional scissors adopt a hardware sensor (Hall) to sense the position of a knife edge in use, the size of the knife edge of the scissors is determined by the arrangement and placement position of the sensor in actual use, and the scissors which are mainstream in the market at present are mostly designed according to a large opening or a small opening only in use. In the multi-gear electric scissors described in the publication No. CN 205124451, in actual use, regardless of how large wood is cut, the opening and closing strokes of the blades are fixed, for example, the opening of the blade of a certain scissors is only 37MM with a large opening, when the diameter of a frequently cut branch is about equal to 10MM, the opening and closing stroke of the blade is 37MM each time, but the actual effective cutting part is only 10MM at the closed end, and the first half 27MM with the closed blade not only consumes the battery power but also consumes the cutting time in actual use.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.
In order to achieve the purpose, the invention provides the following technical scheme: an intelligent control electric shear with any position of a knife edge staying comprises a shear main body, wherein the front end of the shear main body is provided with an electric shear head which is provided with a three-phase brushless direct current motor for electric drive, a circuit module for controlling the electric shear head to complete shearing action is arranged inside the shear main body, and a trigger with a magnet is arranged outside the shear main body; wherein, the circuit module includes:
the driving ends KU1, KV1 and KW1 of the motor driving circuit are electrically connected with a three-phase brushless direct current motor of the electric scissor head;
the single chip microcomputer control circuit is provided with 6 pins which are led out and are respectively connected with six signal receiving ends of the motor driving circuit;
the Hall signal receiving circuit is connected with one pin of the singlechip control circuit, and a Hall sensing module is arranged on the Hall signal receiving circuit and corresponds to the magnet on the trigger;
the current detection circuit is electrically connected with the singlechip control circuit;
and the buzzer driving circuit is electrically connected with the singlechip control circuit.
Preferably, the single chip microcomputer control circuit is provided with a single chip microcomputer U1, a peak value overcurrent value detection circuit, a motor zero-crossing detection circuit and a motor high-speed zero-crossing detection circuit, and signal receiving ends of the motor zero-crossing detection circuit and the motor high-speed zero-crossing detection circuit are connected with the three-phase brushless direct current motor.
Preferably, the peak overcurrent value detection circuit comprises a resistor R7, a resistor R14 and a capacitor C6, and the two resistors R7 and R14 are connected to a pin of the singlechip U1 after voltage division and filtering of the capacitor C6.
Preferably, the motor zero-crossing detection circuit comprises a resistor R29, a resistor R30, a resistor R32, a resistor R33, a resistor R39, a resistor R41, a capacitor C40, a capacitor C41 and a capacitor C42, wherein one end of each of the resistor R29, the resistor R30 and the resistor R32 is connected with each of the three-phase brushless dc motors, and the other end of each of the resistor R29, the resistor R30 and the resistor R32 is divided by the resistor R41, the resistor R33 and the resistor R39, filtered by the capacitor C41, the capacitor C42 and the capacitor C40, and then connected to a pin of the single chip microcomputer U1.
Preferably, the motor high-speed zero-crossing detection circuit comprises a resistor R45, a resistor R47, a resistor R48, a resistor R49, a resistor R50, a resistor R51, a resistor R61, a capacitor C61, a comparator U4 61 and a comparator U4 61, wherein the resistor R61, the capacitor C61 and the capacitor C61 form 3 voltage division sampling circuits, which are respectively connected with each of the three-phase brushless dc motor, and then respectively connected with 3 single-chip microcomputers of the comparator U61, the comparator U4 61 and the comparator U4 61.
Preferably, the current detection circuit comprises a resistor R18, a resistor R20, a resistor R25, a resistor R26, a resistor R27, a resistor R46, a capacitor C9 and a capacitor C30, wherein the resistor R46 is connected to a loop of the motor drive circuit, the resistor R18, the resistor R20 and the capacitor C9 form a voltage acquisition circuit, the resistor R25, the resistor R26, the resistor R27 and the capacitor C30 form a current acquisition circuit, and the resistor R46 is connected to two pins of the single chip microcomputer U1 through the voltage acquisition circuit and the current acquisition circuit respectively.
A control method of intelligent control electric shears with any position of a knife edge staying comprises the intelligent control electric shears with any position of the knife edge staying, and comprises the following steps:
and 5, pulling a trigger, carrying out equal-proportion quantization processing on the induction signal and the shearing stroke according to the data processing module, and driving the electric shears to carry out shearing operation.
Compared with the prior art, the invention has the following beneficial effects:
by arranging a circuit module, a Hall signal receiving circuit is adopted to correspond to a magnet on a trigger, a three-phase brushless direct current motor is driven in an induction way through a Hall effect, so that the electric scissor head can carry out a corresponding shearing stroke according to the tripping stroke of the trigger, wherein, a current detection circuit is adopted, a sampling resistor R46 of 5mr is connected in series on a loop of the motor driving circuit to obtain the current value on the loop of the motor driving circuit, thereby obtaining the shearing load condition of the electric scissor head, the current detection circuit is positively correlated with the induction signal collected by the Hall signal receiving circuit, so that the knife edge of the electric scissor head can realize the stop at any position, a timing function is loaded in a singlechip U1 of a singlechip control circuit, then the timing function is matched through a trigger tripping mode, when the trigger tripping mode is matched with the time set by the timing function, the current knife edge size can be set as the subsequent shearing knife edge size through the singlechip U1, when the trigger is pulled in another way to match with the timing function, the size of the shearing knife edge can be reset to the size of the shearing knife edge when the electric shears are opened to the maximum extent through the singlechip U1, and the buzzer driving circuit sounds to serve as a prompt; through the design, the intelligent control electric scissors capable of staying at any position of the edge can define the size of the edge of the scissors according to the size of branches needing to be frequently cut in use at any time to realize the maximum use of the electric quantity of a battery and save the time of cutting the edge without cutting; when branches with the same diameter are frequently cut, the size of the knife edge of the electric scissors head can be reduced in such a way, the time consumed by empty cutting is reduced, and the cutting efficiency is improved;
by arranging the peak overcurrent value detection circuit, the voltage is divided by the two resistors R7 and R14 and then filtered by the capacitor C6, and then the voltage is connected to the pin of the singlechip U1, the singlechip U1 is provided with a comparator function, the voltage values of the two input pins are detected, the comparison result can be known inside, corresponding action is made, and the electric scissors are protected;
the motor zero-crossing detection circuit is arranged to connect resistors in parallel on the three-phase brushless direct current motor, the voltage value of the current phase can be calculated through voltage division sampling, the three-phase voltage value at any moment can be acquired by the single chip microcomputer U1 through the ADC function, and the zero-crossing point of the three-phase brushless direct current motor can be known through comparing different voltage values, so that the stable phase change of the three-phase brushless direct current motor is realized, and the continuous and stable operation of the three-phase brushless direct current motor is realized;
through setting up the high-speed zero passage detection circuit of motor, when three-phase brushless DC motor rotational speed was too fast, only through the sampling current value, probably there is the moment that the chronogenesis can't correspond, so parallelly connected resistance on three-phase brushless DC motor, through the partial pressure sample and through the comparator that the model is LM339, can obtain current three-phase brushless DC motor position value, singlechip U1 is through detecting these 3 pin values, and rotate the chronogenesis according to three-phase brushless DC motor and can realize the continuous steady operation under the high-speed condition of three-phase brushless DC motor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of a circuit block according to the present invention;
FIG. 3 is a block diagram of the control circuit of the single-chip microcomputer U1 and a three-phase brushless DC motor according to the present invention;
FIG. 4 is a connection diagram of program modules of the single-chip microcomputer U1 in the invention;
FIG. 5 is a schematic diagram of a circuit configuration of a motor driving circuit according to the present invention;
FIG. 6 is a schematic circuit diagram of a single-chip microcomputer U1 in the invention;
FIG. 7 is a schematic diagram of a circuit structure of a Hall signal receiving circuit according to the present invention;
FIG. 8 is a schematic diagram of the current detection circuit according to the present invention;
FIG. 9 is a schematic diagram of the circuit structure of the buzzer driving circuit according to the present invention;
FIG. 10 is a schematic diagram of the circuit configuration of the power supply circuit of the present invention;
fig. 11 is a schematic circuit diagram of a peak overcurrent value detection circuit according to the present invention;
fig. 12 is a schematic circuit diagram of the motor zero-crossing detection circuit according to the present invention;
fig. 13 is a schematic circuit diagram of the high-speed zero-crossing detection circuit of the motor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 13, in an embodiment of the present invention, an intelligent control electric shears with any position of a cutting edge includes a shears body 10, an electric shears head 11 with a three-phase brushless dc motor 25 for electric driving is disposed at a front end of the shears body 10, a circuit module for controlling the electric shears head 11 to complete a shearing action is disposed inside the shears body 10, and a trigger 13 with a magnet is disposed outside the shears body 10; wherein, the circuit module includes:
the driving ends KU1, KV1 and KW1 of the motor driving circuit 24 are electrically connected with the three-phase brushless direct current motor 25 of the electric scissor head 11;
the single chip microcomputer control circuit 21 is characterized in that 6 pins are led out of the single chip microcomputer control circuit 21 and are respectively connected with six signal receiving ends of the motor driving circuit 24;
the Hall signal receiving circuit 22 is connected with one pin of the singlechip control circuit 21, and a Hall sensing module is arranged on the Hall signal receiving circuit 22 and corresponds to the magnet on the trigger 13;
the current detection circuit 26 is electrically connected with the singlechip control circuit 21;
and the buzzer driving circuit 23 is electrically connected with the singlechip control circuit 21.
As further shown in fig. 3, 5, 6, 11, 12 and 13, the single chip microcomputer control circuit 21 is provided with a single chip microcomputer U1, a peak overcurrent value detection circuit 213, a motor zero-crossing detection circuit 211 and a motor high-speed zero-crossing detection circuit 212, wherein the single chip microcomputer U1 is XMC 1301; the signal receiving ends of the motor zero-crossing detection circuit 211 and the motor high-speed zero-crossing detection circuit 212 are connected with the three-phase brushless direct current motor 25.
Further as shown in fig. 11, the peak overcurrent value detection circuit 213 includes a resistor R7, a resistor R14, and a capacitor C6, and the two resistors R7 and R14 divide voltage and then are filtered by a capacitor C6 and then are connected to a pin of the single chip microcomputer U1.
Further as shown in fig. 12, the motor zero-cross detection circuit 211 includes a resistor R29, a resistor R30, a resistor R32, a resistor R33, a resistor R39, a resistor R41, a capacitor C40, a capacitor C41, and a capacitor C42, one end of each of the resistor R29, the resistor R30, and the resistor R32 is connected to each of the three-phase brushless dc motors 25, and the other end of each of the resistor R29, the resistor R30, and the resistor R32 is divided by a resistor R41, a resistor R33, and a resistor R39, and then is filtered by a capacitor C41, a capacitor C42, and a capacitor C40, and then is connected to a pin of the single chip microcomputer U1.
As further shown in fig. 13, the motor high-speed zero-crossing detection circuit 212 includes a resistor R45, a resistor R47, a resistor R48, a resistor R49, a resistor R50, a resistor R51, a resistor R61, a resistor R62, a resistor R64, a capacitor C23, a capacitor C24, a capacitor C37, a comparator U4B, a comparator U4C, and a comparator U4D, wherein the resistor R45, the resistor R47, the resistor R48, the resistor R49, the resistor R50, the resistor R51, the resistor R61, the resistor R62, the resistor R64, the capacitor C23, the capacitor C24, and the capacitor C37 constitute 3 voltage division sampling circuits, which are respectively connected to each of the three-phase brushless dc motor 25, and are respectively connected to 3 pins of the single chip microcomputer U1 through the comparator U4B, the comparator U4C, and the comparator U4D.
Further as shown in fig. 8, the current detection circuit 26 includes a resistor R18, a resistor R20, a resistor R25, a resistor R26, a resistor R27, a resistor R46, a capacitor C9, and a capacitor C30, wherein the resistor R46 is connected to a loop of the motor drive circuit 24, the resistor R18, the resistor R20, and the capacitor C9 form a voltage acquisition circuit, the resistor R25, the resistor R26, the resistor R27, and the capacitor C30 form a current acquisition circuit, and the resistor R46 is connected to two pins of the single chip U1 through the voltage acquisition circuit and the current acquisition circuit, respectively.
In the above technical means, by providing a circuit module, the hall signal receiving circuit 22 is adopted to correspond to the magnet on the trigger 13, the three-phase brushless dc motor 25 is inductively driven by the hall effect, so that the electric scissor head 11 can perform the corresponding shearing stroke according to the tripping stroke of the trigger 13, wherein, by adopting the current detection circuit 26, the sampling resistor R46 of 5mr is connected in series on the loop of the motor driving circuit 24 to obtain the current value on the loop of the motor driving circuit 24, thereby obtaining the shearing load condition of the electric scissor head 11, the positive correlation is made with the induction signal collected by the hall signal receiving circuit 22, so that the knife edge of the electric scissor head 11 can realize the stop at any position, and by loading the timing function in the singlechip U1 of the singlechip control circuit 21, and then matching the timing function by a way of tripping the trigger 13, when the way of tripping the trigger 13 matches the time set by the timing function, the current knife edge can be set to be the size of the subsequent shearing knife edge through the single chip microcomputer U1, the timing function is matched through another trigger 13 pulling mode, when the trigger 13 pulling mode is matched with the time set by the timing function, the shearing knife edge can be reset to be the size of the shearing knife edge when the electric shears head 11 is opened to the maximum extent through the single chip microcomputer U1, and the buzzer driving circuit gives out a sound to serve as a prompt; through the design, the intelligent control electric scissors capable of staying at any position of the edge can define the size of the edge of the scissors according to the size of branches needing to be frequently cut in use at any time to realize the maximum use of the electric quantity of a battery and save the time of cutting the edge without cutting; when branches with the same diameter are frequently cut, the size of the knife edge of the electric scissor head 11 can be reduced in such a way, the time consumed by empty cutting is reduced, and the cutting efficiency is improved.
By arranging the peak overcurrent value detection circuit 213, the voltage is divided by the two resistors R7 and R14 and then filtered by the capacitor C6, and then the voltage is connected to the pin of the singlechip U1, the singlechip U1 is provided with a comparator function, the voltage values of the two input pins are detected, the comparison result can be known inside, corresponding action is made, and the electric scissors are protected;
the motor zero-crossing detection circuit 211 is arranged to connect resistors in parallel on the three-phase brushless direct current motor 25, the voltage value of the current phase can be calculated through voltage division sampling, the single chip microcomputer U1 can obtain the three-phase voltage value at any moment through the ADC function, and the zero crossing point of the three-phase brushless direct current motor 25 can be known through comparing different voltage values, so that the stable phase change of the three-phase brushless direct current motor 25 is realized, and the continuous and stable operation of the three-phase brushless direct current motor 25 is realized;
through setting up the high-speed zero passage detection circuit 212 of motor, when three-phase brushless DC motor 25 rotational speed was too fast, only through the sampling current value, probably there is the moment that the chronogenesis can't correspond, so parallelly connected resistance on three-phase brushless DC motor 25, through the partial pressure sample and through the comparator that the model is LM339, can obtain current three-phase brushless DC motor 25 position value, singlechip U1 is through detecting this 3 pin values, and rotate the continuous steady operation under the chronogenesis can realize three-phase brushless DC motor 25 high speed condition according to three-phase brushless DC motor 25.
Referring to fig. 1 to 13, in an embodiment of the present invention, a method for controlling an intelligent electric shears with any position of a knife edge, includes the following steps:
and 5, pulling the trigger 13, carrying out equal-proportion quantization processing on the induction signal and the shearing stroke according to the data processing module f, and driving the electric shear head 11 to carry out shearing operation.
According to the control method, the intelligent control electric scissors staying at any position of the edge can define the size of the edge of the scissors according to the size of branches needing to be frequently cut in use at any time to realize the maximum use of the electric quantity of the battery and save the time of cutting the edge without cutting; the implementation mode is as follows:
after the electric scissors are unlocked, the trigger 13 is slightly pulled, a blade on the electric scissors head 11 can be linearly closed according to the pulling stroke of the trigger 13, when the position of a knife edge of a user reaches the size of a branch to be cut, a positioning induction signal and a positioning instruction signal are set according to the knife edge positioning program module c, the data processing module f and the Hall signal acquisition program module h, after the trigger 13 is pulled to generate the positioning induction signal, the positioning induction signal is matched with the positioning instruction signal, the motor driving program module a sets the current opening size of the electric scissors head 11 to be the opening size to be cut later, and the size of the cutting edge of each cutting is set according to the size;
when a user needs to reset the size of the knife edge, if the size of the knife edge needed to be set is smaller than the size of the knife edge set previously, the method is continuously realized, and if the size of the knife edge needed to be set by the user is larger than the size of the knife edge set previously, the method needs to be realized by returning to the maximum opening of the scissors and then according to the method; operation back to the maximum port is as follows;
the method for releasing the maximum opening of the return electric shear head 11 of any opening set currently by a user comprises the following steps: a reset induction signal and a reset instruction signal are set through the knife edge reset program module b, the data processing module f and the Hall signal acquisition program module h, after the trigger 13 is pulled to generate the reset induction signal, the reset induction signal is matched with the reset instruction signal, the motor driving program module a resets the opening size of the electric shear head 11 to the maximum opening size, and the size of the shear knife edge is set according to the size every time.
The peak overcurrent protection circuit has the advantages that the peak overcurrent value detection circuit 213, the motor zero-crossing detection circuit 211 and the motor high-speed zero-crossing detection circuit 212 are arranged in the single chip microcomputer control circuit 21, the comparator program module e, the motor high-speed correction program module i and the motor zero-crossing correction program module j are loaded in the single chip microcomputer U1, the peak overcurrent protection effect is achieved on the circuit, and the continuous and stable operation of the three-phase brushless direct current motor 25 can be achieved.
In order to more clearly illustrate the above technical means, the present application will be further illustrated from the following examples:
[ example 1 ]
Through a data processing module f in the singlechip U1, positively correlating the pulling stroke of the trigger 13 with the shearing stroke of the electric shear head 11, and carrying out equal-proportion quantization processing to finish the operation of pulling the trigger 13 to drive the electric shear head 11 to finish shearing; then, the knife edge resetting program module b and the knife edge positioning program module c are operated while the trigger 13 is pulled;
when the trigger 13 is not pulled to the bottom and the trigger 13 is kept in the state for a certain time, the induction signal generated by the pulling mode is used as a positioning induction signal, the time that the trigger 13 is pulled to the bottom and the time kept in the state are used as positioning instruction signals, when the positioning induction signal and the positioning instruction signals are matched with each other, namely the trigger 13 is not pulled to the bottom and the trigger 13 is kept in the state for a certain time, the singlechip U1 operates a motor driving program module a, the current opening size of the electric shear head 11 is set to be the subsequent opening size, and the size of the cutting edge of each time is set according to the subsequent opening size;
when the trigger 13 is pulled to the bottom quickly, the hand is released simultaneously, the trigger 13 is reset quickly, the sensing signal generated by the pulling mode is used as a reset sensing signal, the time of pulling the trigger 13 to the bottom plus the time of resetting the trigger 13 are used as a reset instruction signal, when the reset sensing signal and the reset instruction signal are matched with each other, the trigger 13 is pulled to the bottom quickly, the hand is released simultaneously, the trigger 13 is reset quickly, the singlechip U1 operates the motor driving program module a, the size of the shearing opening of the electric shear knife head 11 is set to the size of the knife edge which can be opened to the maximum degree by the electric shear knife head 11, and the size of the knife edge is set by the size at every time later.
[ example 2 ]
Through a data processing module f in the singlechip U1, positively correlating the pulling stroke of the trigger 13 with the shearing stroke of the electric shear head 11, and carrying out equal-proportion quantization processing to finish the operation of pulling the trigger 13 to drive the electric shear head 11 to finish shearing; then, the knife edge resetting program module b and the knife edge positioning program module c are operated while the trigger 13 is pulled;
assuming that the stroke of the trigger 13 is 0-10, the stroke of the knife edge of the electric shear head 11 from the opening to the closing is also 0-10, namely the trigger 13 determines the closing setting of the knife edge of the electric shear head 11 according to the actual set stroke from 0-10;
after the positive correlation and the quantization processing are set, for example, when the stroke of the trigger 13 is pulled from 0 to 4 in use, the knife edge is closed by 40% according to the quantization data, and the system judges the stay time of the trigger 13 at the position through the knife edge positioning program module c in real-time operation, when the stay time is matched with the time corresponding to the positioning induction signal, the knife edge position is set as the initial stroke 0, and the maximum opening state of the knife edge is also set as the current opening 0 position; at the moment, if the stroke is 0-10 according to the initial setting, the remaining stroke is 5-10, and similarly, the knife edge opening and closing stroke remains 5-10, but in practical use, the trigger 13 still returns to the original 0 position, namely, after any mouth is taken effect each time, the corresponding software module continuously makes positive correlation between the rest part of the trigger 13 and the rest part of the knife edge, and makes quantization processing of 0-10 on the rest part, namely, the system records the position at the time, and makes 0-10 processing on each subsequent closed mouth, so as to realize real-time control of the trigger 13 and the knife edge;
when the arbitrary opening needs to be relieved, the trigger 13 is pulled to the bottom, the cutting edge is closed, the staying time of the bottom position of the trigger 13 is judged according to the cutting edge resetting program module b, and when the staying time is matched with the time corresponding to the resetting induction signal, the trigger 13 and the cutting edge stroke return to the initial set value, namely the cutting edge of the electric shear head 11 returns to the maximum degree that the electric shear head 11 can be opened.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that different operations can be implemented by other trigger 13 actuation modes in cooperation with the timing function, so as to set the opening size of the electric scissor head 11. The present invention may, therefore, be embodied in other specific forms without departing from the spirit or essential characteristics thereof, and the present invention should be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. An intelligent control electric scissors with an optional tool edge position is characterized by comprising a scissors main body, wherein the front end of the scissors main body is provided with an electric scissors head which is provided with a three-phase brushless direct current motor for electric drive, a circuit module for controlling the electric scissors head to complete shearing action is arranged inside the scissors main body, and a trigger with a magnet is arranged outside the scissors main body; wherein, the circuit module includes:
the driving ends KU1, KV1 and KW1 of the motor driving circuit are electrically connected with a three-phase brushless direct current motor of the electric scissor head;
the single chip microcomputer control circuit is provided with 6 pins which are led out and are respectively connected with six signal receiving ends of the motor driving circuit;
the Hall signal receiving circuit is connected with one pin of the singlechip control circuit, and a Hall sensing module is arranged on the Hall signal receiving circuit and corresponds to the magnet on the trigger;
the current detection circuit is electrically connected with the singlechip control circuit;
and the buzzer driving circuit is electrically connected with the singlechip control circuit.
2. The intelligent control electric scissors for any position of a knife edge to stay according to claim 1, characterized in that a singlechip U1, a peak value overcurrent value detection circuit, a motor zero-crossing detection circuit and a motor high-speed zero-crossing detection circuit are arranged on a singlechip control circuit, and signal receiving ends of the motor zero-crossing detection circuit and the motor high-speed zero-crossing detection circuit are connected with a three-phase brushless direct current motor.
3. The intelligent control electric scissors for any position of a knife edge to stay according to claim 2, wherein the peak overcurrent value detection circuit comprises a resistor R7, a resistor R14 and a capacitor C6, and the two resistors R7 and R14 are connected to a pin of a singlechip U1 after being subjected to voltage division and then filtered by a capacitor C6.
4. The intelligent control electric scissors for any position of a knife edge to stay according to claim 2, wherein the motor zero-crossing detection circuit comprises a resistor R29, a resistor R30, a resistor R32, a resistor R33, a resistor R39, a resistor R41, a capacitor C40, a capacitor C41 and a capacitor C42, one end of each of a resistor R29, a resistor R30 and a resistor R32 is connected with each of the three-phase brushless DC motors, and the other end of each of the resistor R29, the resistor R30 and the resistor R32 is respectively subjected to voltage division through a resistor R41, a resistor R33 and a resistor R39 and then is respectively subjected to filtering through a capacitor C41, a capacitor C42 and a capacitor C40 and then is connected to a pin of a singlechip U1.
5. The intelligent control electric scissors for knife edge optional position stay according to claim 2, characterized in that the motor high-speed zero-crossing detection circuit comprises a resistor R45, a resistor R47, a resistor R48, a resistor R49, a resistor R50, a resistor R51, a resistor R61, a capacitor C61, a comparator U4 61 and a comparator U4 61, wherein the resistor R61, the capacitor C61 and the capacitor C61 form 3 sampling circuits, which are respectively connected with each of the brushless three-phase direct current motor, and are respectively connected with 3 voltage division pins of the single chip microcomputer U61 through the comparator U4 61, the comparator U4 61 and the comparator U61.
6. The intelligent control electric scissors for any position of a knife edge to stay according to claim 2, wherein the current detection circuit comprises a resistor R18, a resistor R20, a resistor R25, a resistor R26, a resistor R27, a resistor R46, a capacitor C9 and a capacitor C30, wherein the resistor R46 is connected to a loop of the motor driving circuit, the resistor R18, the resistor R20 and the capacitor C9 form a voltage acquisition circuit, the resistor R25, the resistor R26, the resistor R27 and the capacitor C30 form a current acquisition circuit, and the resistor R46 is connected to two pins of a single chip microcomputer U1 through the voltage acquisition circuit and the current acquisition circuit respectively.
7. A control method of intelligent control electric shears with any position of the cutting edge staying, which comprises the intelligent control electric shears with any position of the cutting edge staying of any claim 1-6, and is characterized by comprising the following steps:
step 1, arranging an electric scissors head with a three-phase brushless direct current motor for electric driving at the front end of a scissors main body, arranging a motor driving circuit to be connected with the three-phase brushless direct current motor, arranging a single chip microcomputer control circuit to be connected with the motor driving circuit, arranging a current detection circuit, detecting the running condition of the three-phase brushless direct current motor by calculating the current of the three-phase brushless direct current motor during running according to even ohm's law, arranging a Hall signal receiving circuit to be connected with the single chip microcomputer control circuit, and arranging a buzzer driving circuit to be connected with the single chip microcomputer control circuit; a trigger with a magnet is arranged on the scissors main body and corresponds to the Hall sensing module on the Hall signal receiving circuit;
step 2, setting a power supply circuit, wherein the power supply circuit provides three power supplies, the first power supply is a DC5V power supply for a singlechip control circuit, a current detection circuit, a Hall signal receiving circuit and a buzzer driving circuit, the second power supply is a DC12-24V power supply VCC for the three-phase brushless direct current motor to work, and the third power supply is a 12V power supply for providing pull-up capability for a chip U2 in the motor driving circuit;
step 3, in the single chip microcomputer control circuit, connecting a single chip microcomputer U1 with a peak value overcurrent value detection circuit, a motor zero-crossing detection circuit and a motor high-speed zero-crossing detection circuit respectively, wherein the motor zero-crossing detection circuit and the motor high-speed zero-crossing detection circuit are both connected with a three-phase brushless direct current motor, then arranging a serial port circuit connected with a single chip microcomputer U1, and loading a motor driving program module, a knife edge reset program module, a knife edge positioning program module, a buzzer driving program module, a comparator program module, a data processing module, a current detection program module, a Hall signal acquisition program module, a motor high-speed correction program module and a motor zero-crossing correction program module in a program storage of the single chip microcomputer U1 through the serial port circuit, wherein each program module can be loaded and operated by a processor;
step 4, electrifying the electric scissors, operating the data processing module, the current detection program module and the Hall signal acquisition program module by the singlechip U1, wherein the Hall signal acquisition program module acquires an induction signal of the Hall induction module through the Hall signal receiving circuit, the current detection program module acquires the shearing stroke of the electric scissors head through the current detection circuit, and then carrying out equal-proportion quantization processing on the induction signal and the shearing stroke through the data processing module;
and 5, pulling a trigger, carrying out equal-proportion quantization processing on the induction signal and the shearing stroke according to the data processing module, and driving the electric shears to carry out shearing operation.
Step 6, the single chip microcomputer U1 runs a knife edge positioning program module, the knife edge positioning program module generates a positioning instruction signal through timing, a data processing module obtains a unique induction signal of the Hall signal acquisition program module, the unique induction signal is used as a positioning induction signal, then the data processing module matches the positioning induction signal with the positioning instruction signal, and when the positioning induction signal is matched with the positioning instruction signal, the motor driving program module sets the current opening size of the electric scissors head to be the subsequent opening size; meanwhile, the singlechip U1 operates a buzzer driving program module to drive a buzzer driving circuit to send out a positioning prompt sound;
step 7, the single chip microcomputer U1 operates the knife edge reset program module, the knife edge reset program module generates a reset instruction signal through timing, the data processing module acquires the unique induction signal of the Hall signal acquisition program module, the unique induction signal is used as the reset induction signal, then the data processing module matches the reset induction signal with the positioning instruction signal, and when the reset induction signal is matched with the positioning instruction signal, the motor driving program module resets the opening size of the electric scissors head to the maximum opening size which can be opened by the electric scissors head; meanwhile, the singlechip U1 operates the buzzer driving program module to drive the buzzer driving circuit to send out a positioning prompt sound.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110091626.8A CN112809751A (en) | 2021-01-23 | 2021-01-23 | Intelligent control electric shears with any position of knife edge staying and control method thereof |
| CN202121011046.5U CN214924636U (en) | 2021-01-23 | 2021-05-12 | Intelligent control electric shears with randomly-arranged knife edge |
| CN202110518636.5A CN113246180A (en) | 2021-01-23 | 2021-05-12 | Intelligent control electric shears with randomly-arranged knife edge and control method thereof |
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| CN202110091626.8A CN112809751A (en) | 2021-01-23 | 2021-01-23 | Intelligent control electric shears with any position of knife edge staying and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260946A (en) * | 2021-11-30 | 2022-04-01 | 陕西能源研究院有限公司 | Self-locking wireless electric cutter |
| CN115362841A (en) * | 2022-09-03 | 2022-11-22 | 东莞市嘉航实业有限公司 | Shearing opening degree control method of electric shearing tool |
-
2021
- 2021-01-23 CN CN202110091626.8A patent/CN112809751A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260946A (en) * | 2021-11-30 | 2022-04-01 | 陕西能源研究院有限公司 | Self-locking wireless electric cutter |
| CN115362841A (en) * | 2022-09-03 | 2022-11-22 | 东莞市嘉航实业有限公司 | Shearing opening degree control method of electric shearing tool |
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