CN218526251U - Hedge trimmer control system and hedge trimmer - Google Patents
Hedge trimmer control system and hedge trimmer Download PDFInfo
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- CN218526251U CN218526251U CN202222472258.4U CN202222472258U CN218526251U CN 218526251 U CN218526251 U CN 218526251U CN 202222472258 U CN202222472258 U CN 202222472258U CN 218526251 U CN218526251 U CN 218526251U
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Abstract
The utility model provides a hedge trimmer control system and hedge trimmer. The utility model discloses a hedge trimmer control system, wherein, detection circuit links to each other with communication circuit, and detection circuit is used for the current-voltage in the detection circuit, and sends current-voltage to communication circuit; the communication circuit is connected with the alarm circuit and is used for sending an alarm signal corresponding to the data to the alarm circuit, wherein the alarm circuit buzzes and alarms after receiving the alarm signal; the DCDC voltage reduction circuit is connected with the communication circuit and used for reducing the voltage of the input circuit and supplying power to the circuit; the motor driving circuit is connected with the motor back electromotive force detection circuit and the current detection circuit and used for driving the motor to reversely run after the alarm circuit buzzes and alarms. When the blade of the hedge trimmer is blocked, the motor is controlled to run for a certain distance in the opposite direction, the clamped object is loosened, the clamped blade is smoothly taken down, and the machine is prevented from being damaged.
Description
Technical Field
The utility model relates to an afforestation technical field particularly, relates to a hedge trimmer control system and hedge trimmer.
Background
The hedge trimmer is also called hedge trimmer, and is suitable for tea trimming, garden trimming, roadside hedge trimming and other garden greening aspects.
When the existing hedge trimmer is used for trimming, if objects which cannot be cut off such as large branches are encountered, the motor stops running, the blade can be clamped into the objects at the moment, the blade cannot be automatically loosened from the clamped objects by depending on the hedge trimmer, the blade can be broken off or the machine is damaged due to hard breaking, the motor is damaged more, and the operation efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem how to realize that hedge trimmer blade card easily takes off when in the object.
In order to solve the above problems, the utility model provides a hedge trimmer control system, which comprises a detection circuit, a communication circuit, an alarm circuit, a DCDC voltage reduction circuit and a motor drive circuit; the detection circuit is connected with the communication circuit and is used for detecting current and voltage and sending the current and voltage to the communication circuit; the detection circuit comprises a current detection circuit, a motor counter electromotive force detection circuit, a power supply voltage detection circuit and a hardware overcurrent value detection circuit; the communication circuit is connected with the alarm circuit and is used for sending a corresponding alarm signal to the alarm circuit when the current detection circuit detects that the current exceeds a rated load current set value, wherein the alarm circuit is used for carrying out buzzing alarm after receiving the alarm signal; the DCDC voltage reduction circuit is connected with the communication circuit and is used for reducing the voltage input to the detection circuit, the communication circuit, the alarm circuit and the motor drive circuit so as to supply power to the detection circuit, the communication circuit, the alarm circuit and the motor drive circuit; the motor driving circuit is connected with the motor back electromotive force detection circuit and the current detection circuit, and the motor driving circuit is used for driving the motor to reversely run after the alarm circuit buzzes and alarms.
Hedge trimmer control system, motor drive circuit is used for driving motor normal work, DCDC step-down circuit provides the direct current and supplies power for whole circuit, current detection circuit, motor back electromotive force detection circuit, supply voltage detection circuit and hardware overcurrent value detection circuit carry out current voltage to the motor that is working, when detecting out electric current and surpass rated load current setting value, can carry out buzzer warning and show alarm signal through alarm circuit and communication circuit, with this blade of deciding hedge trimmer is plugged up, hedge trimmer control system automatic control motor moves one section distance to the opposite direction this moment, ensure that the object that blocks loosens, can take off the blade that blocks easily, avoid the machine to damage.
Optionally, the communication circuit includes a first chip and a second chip, and the first chip is connected to the second chip; the first chip is externally provided with a first resistor and a second resistor, the first resistor is connected with the SWD _ CLK interface, the second resistor is connected with the SWD _ IO interface, and the second chip is externally connected with a power supply key and connected with the DCDC voltage reduction circuit.
Hedge trimmer control system, realize when the blade of hedge trimmer is blocked through communication circuit, in time report to the police, avoid the machine to damage.
Optionally, the alarm circuit includes a first diode and a first triode, the first diode is used for conducting electricity in a single direction, a third resistor is arranged outside the first triode, the third resistor is connected with the Buzzer interface, and the triode Q1 is used for amplifying a signal to reach the power responded by the Buzzer BUZ 1.
Hedge trimmer control system, realize when the blade of hedge trimmer is blocked through alarm circuit, buzzer among the alarm circuit responds the warning, avoids the machine to damage.
Optionally, the current detection circuit includes a capacitance current detection unit and a temperature-rising current detection unit; the capacitance current detection unit comprises a fourth resistor, a fifth resistor and a first capacitor, the fourth resistor is connected with the first capacitor in series, and the fifth resistor is connected between the fourth resistor and the first capacitor in parallel and is connected with an IPeak interface; the temperature-rising current detection unit comprises a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, the seventh resistor is connected with the eighth resistor in series, the sixth resistor is connected between the seventh resistor and the eighth resistor in parallel, and the second capacitor is connected with the seventh resistor in parallel and is connected with the IRms interface.
Hedge trimmer control system, whether the motor current that detects through the current detection circuit and working surpasss rated load current, when detecting out the electric current and surpassing rated load current setting value, report to the police and avoid the machine to damage.
Optionally, the motor back electromotive force detection circuit is connected with a motor three wire.
Hedge trimmer control system, judge the blade of hedge trimmer through motor back electromotive force detection circuitry and turn to whether normally whether to be blocked with this blade of judging the hedge trimmer.
Optionally, the power supply voltage detection circuit includes a ninth resistor, a tenth resistor, an eleventh resistor, and a third capacitor, the ninth resistor is connected in series with the eleventh resistor, the tenth resistor is connected in parallel between the ninth resistor and the eleventh resistor, the third capacitor is connected in parallel with the tenth resistor, and the tenth resistor is connected to the VDC interface.
Hedge trimmer control system, whether normal through the motor voltage that mains voltage detection circuit detected being worked to this judges whether normal work of hedge trimmer.
Optionally, the hardware overcurrent value detection circuit includes a twelfth resistor, a thirteenth resistor, and a fourth capacitor, where the twelfth resistor is connected in series with the thirteenth resistor, the fourth capacitor is connected in parallel with the thirteenth resistor, and the fourth capacitor is connected to the overtcset interface.
Hedge trimmer control system, overflow value detection circuit through hardware and carry out overcurrent protection to the electric current of exporting, avoid overflowing to lead to the device to burn out so that the circuit board damages.
Optionally, the DCDC voltage-reducing circuit includes a feedback suppressor and a voltage-regulator tube, the DCDC voltage-reducing circuit is externally connected with direct current, the direct current reduces voltage through the feedback suppressor to output voltage, and the voltage-regulator tube is connected with an input end of the DCDC voltage-reducing circuit.
Hedge trimmer control system, through setting up the stabilivolt of being connected with DCDC step-down circuit's input, prevent that the communication signal electric potential is too high, damage the circuit to be favorable to the circuit stability among the hedge trimmer control system, and step down input voltage through DCDC step-down circuit.
Optionally, the motor driving circuit includes a driving chip and a power tube, the driving chip is connected to the power tube, and an output end of the power tube is connected to the motor back electromotive force detection circuit.
Hedge trimmer control system, be used for amplified power through motor drive circuit, increase the terminal current output quantity and the output quantity of electric current, normally work through motor drive circuit driving motor.
The utility model also provides a hedge trimmer, including the motor and as above hedge trimmer control system, the motor with hedge trimmer control system links to each other. The advantages of the hedge trimmer and the hedge trimmer control system are the same compared with the prior art, and are not described herein again.
Drawings
Fig. 1 is a schematic block diagram of a hedge trimmer control system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a speed detection circuit of the hedge trimmer control system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a display circuit of the hedge trimmer control system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a minimum system of a single chip microcomputer of the hedge trimmer control system according to the embodiment of the present invention;
fig. 5 is a schematic diagram of a communication circuit of the hedge trimmer control system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an alarm circuit of the hedge trimmer control system according to the embodiment of the present invention;
fig. 7 is a schematic diagram of a current detection circuit of the hedge trimmer control system according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a motor back electromotive force detection circuit of the hedge trimmer control system according to the embodiment of the present invention;
fig. 9 is a schematic diagram of a power supply voltage detection circuit of the hedge trimmer control system according to the embodiment of the present invention;
fig. 10 is a schematic diagram of a hardware overcurrent value detection circuit of the hedge trimmer control system according to the embodiment of the present invention;
fig. 11 is a schematic circuit diagram of a DCDC voltage reduction circuit of the hedge trimmer control system according to the embodiment of the present invention;
fig. 12 is a schematic diagram of a motor driving circuit of a hedge trimmer control system according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
With reference to fig. 1, an embodiment of the present invention provides a hedge trimmer control system, which includes a detection circuit, a communication circuit, an alarm circuit, a DCDC voltage reduction circuit, and a motor driving circuit; the detection circuit is connected with the communication circuit and is used for detecting current and voltage and sending the current and voltage to the communication circuit; the detection circuit comprises a current detection circuit, a motor back electromotive force detection circuit, a power supply voltage detection circuit and a hardware overcurrent value detection circuit; the communication circuit is connected with the alarm circuit and is used for sending a corresponding alarm signal to the alarm circuit when the current detection circuit detects that the current exceeds a rated load current set value, wherein the alarm circuit is used for carrying out buzzing alarm after receiving the alarm signal; the DCDC voltage reduction circuit is connected with the communication circuit and is used for reducing the voltage input to the detection circuit, the communication circuit, the alarm circuit and the motor drive circuit so as to supply power to the detection circuit, the communication circuit, the alarm circuit and the motor drive circuit; the motor driving circuit is connected with the motor back electromotive force detection circuit and the current detection circuit, and the motor driving circuit is used for driving the motor to reversely run after the alarm circuit performs buzzing alarm.
The hedge trimmer control system comprises a communication circuit, an alarm circuit, a current detection circuit, a motor back electromotive force detection circuit, a power supply voltage detection circuit, a hardware overcurrent value detection circuit, a DCDC voltage reduction circuit and a motor drive circuit; the DCDC voltage reduction circuit is used for reducing and outputting the direct current input to the hedge trimmer control system, and the output direct current is used for supplying power to the whole circuit; the motor driving circuit is connected with the driving motor to work; the current detection circuit, the motor back electromotive force detection circuit, the power supply voltage detection circuit and the hardware overcurrent value detection circuit detect whether the current and the voltage of the motor are normal in real time when the motor works normally, when the current is detected to exceed a rated load current set value, an alarm signal is generated, the alarm circuit is connected with the communication circuit, the alarm signal is sent to the alarm circuit to give an alarm, at the moment, the blade of the hedge trimmer is judged to be blocked, the motor can be controlled to run for a certain distance in the reverse direction by adopting a mode of reversely driving the motor by a single chip microcomputer, so that a clamped object is ensured to be loosened, the clamped blade can be easily taken down, and the machine is prevented from being damaged; the single chip microcomputer reverse driving motor can be switched in a high-low level mode, belongs to the prior art and is not described herein any more.
As shown in fig. 2, the hedge trimmer control system further includes a speed detection circuit, the speed detection circuit can be connected to the single chip microcomputer, the speed detection circuit is used for detecting the speed of the motor in real time when the motor works, and if the speed of the motor is lower than a set value, it is determined that the blade of the hedge trimmer is clamped.
Wherein, as shown in fig. 3, hedge trimmer control system still includes the display circuit, and the display circuit can link to each other with the singlechip, and after the singlechip received the signal, the P0.13 mouth output low level of the singlechip of connecting pilot lamp LED1 realizes switching on, and pilot lamp LED1 lights this moment for remind operating personnel hedge trimmer's blade to be blocked, play the warning effect, and the resistance R20 who establishes ties with pilot lamp LED1 is used for the limiting current in order to protect pilot lamp LED1.
As shown in fig. 4, the external resistor R53, the thermistor NTC1, and the capacitor C29 of the single chip microcomputer are connected in series, the resistor R53 is connected in series with the thermistor NTC1, the capacitor C29 is connected in parallel with the thermistor NTC1, and the resistor R53 is a pull-up resistor and is used for solving the problem of high level output/output.
Hedge trimmer control system, motor drive circuit is used for driving motor normal work, DCDC step-down circuit provides the direct current and supplies power for whole circuit, current detection circuit, motor back electromotive force detection circuit, supply voltage detection circuit and hardware overcurrent value detection circuit carry out current voltage to the motor that is working, when detecting out electric current and surpass rated load current setting value, carry out buzzer warning and show alarm signal through alarm circuit and communication circuit, with this blade of deciding hedge trimmer is plugged up, hedge trimmer control system automatic control motor moves one section distance to the opposite direction this moment, ensure that the object that blocks loosens, can take off the blade that blocks easily, avoid the machine to damage.
Optionally, the communication circuit includes a first chip and a second chip, and the first chip is connected to the second chip; the first chip is externally provided with a first resistor and a second resistor, the first resistor is connected with the SWD _ CLK interface, the second resistor is connected with the SWD _ IO interface, and the second chip is externally connected with a power supply key and connected with the DCDC voltage reduction circuit.
Specifically, the communication circuit is connected with the alarm circuit, and when receiving a corresponding alarm signal, the communication circuit sends the alarm signal to the alarm circuit.
For example, as shown in fig. 5, a first chip in the communication circuit is CON1, a second chip is CON4, a first resistor is resistor R4, and a second resistor is resistor R5, the resistor R4 is connected to an SDA pin of the single chip microcomputer through an SWD _ CLK interface, the resistor R5 is connected to an SCL pin of the single chip microcomputer through an SWD _ IO interface, and when the single chip microcomputer receives a signal, data transmission is performed and the alarm circuit is controlled to alarm, where the SCL pin is at a high level, and the SDA pin jumps from the high level to a low level to start transmitting data; when the SCL pin is high, the SDA pin transitions from low to high, ending the data transfer.
Hedge trimmer control system, realize in time reporting to the police when the blade of hedge trimmer is blocked through communication circuit, avoid the machine to damage.
Optionally, the alarm circuit includes a first diode and a first triode, the first diode is used for conducting electricity in one direction, a third resistor is arranged outside the first triode, the third resistor is connected with the Buzzer interface, and the triode Q1 is used for amplifying a signal to reach the power responded by the Buzzer BUZ 1.
Specifically, the alarm circuit performs a buzzer alarm after receiving an alarm signal of the communication circuit method.
For example, as shown in fig. 6, a first diode D2, a first triode Q1, and a third resistor R10 are included in the alarm circuit, and the alarm circuit is connected to the OUT11 pin of the single chip microcomputer through the buczzer interface; when the alarm circuit receives an alarm signal sent by the single chip microcomputer, a pin P0.6 (OUT 11) of an I/0 port of the single chip microcomputer outputs a high level to drive the triode to be conducted, the buzzer is electrified to send OUT an alarm sound, the PNP triode connected with the direct-current active buzzer plays a role of controlling the switch, and the resistor R10 plays a role of limiting current.
Hedge trimmer control system, realize when the blade of hedge trimmer is blocked through alarm circuit, buzzer among the alarm circuit responds the warning, avoids the machine to damage.
Optionally, the current detection circuit includes a capacitance current detection unit and a temperature-rising current detection unit; the capacitance current detection unit comprises a fourth resistor, a fifth resistor and a first capacitor, the fourth resistor is connected with the first capacitor in series, and the fifth resistor is connected between the fourth resistor and the first capacitor in parallel and is connected with an IPeak interface; the temperature-rising current detection unit comprises a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, the seventh resistor is connected with the eighth resistor in series, the sixth resistor is connected between the seventh resistor and the eighth resistor in parallel, and the second capacitor is connected with the seventh resistor in parallel and connected with the IRms interface.
Specifically, the current detection circuit is connected with the communication circuit and is used for detecting the current of the motor in the full-speed rotation process.
For example, as shown in fig. 7, a fourth resistor in the capacitance current detection unit is a resistor R23, a fifth resistor is a resistor R24, and a first capacitor is a capacitor C14, a sixth resistor in the temperature-raising current detection unit is a resistor R32, a seventh resistor is a resistor R35, an eighth resistor is a resistor R36, and a second capacitor is a capacitor C22, the current detection circuit is connected to the motor driving circuit, when the motor normally operates, the current is measured by sensing a voltage drop across the resistors, and when the single chip detects that the current is too large, the power supply of the motor is immediately cut off, so that overcurrent protection is realized;
in this embodiment, the current detection circuit uses a resistance value in which a voltage drop when a current flows is several tens mV to several hundreds mV, and the low resistor for current detection uses a small resistance value of several Ω or less; since a very small resistance of several m Ω is required for detecting a large current of several tens a, a metal plate type and a metal foil type low resistor having a very small resistance are commonly used, and a small current is detected by a large resistance of several hundreds m Ω to several Ω.
Hedge trimmer control system, whether the motor current that detects through the current detection circuit and working surpasss the rated load electric current, when detecting out that the electric current surpasss the rated load electric current and is less than the setting value, report to the police and avoid the machine to damage.
Optionally, the motor back electromotive force detection circuit is connected with a motor three-wire.
Specifically, the motor back electromotive force detection circuit detects the electrical angular position of the rotor by detecting the voltage difference of the coil, thereby performing phase conversion.
For example, as shown in fig. 8, U, V, and W are respectively connected to a motor driving circuit, and are respectively connected to a single chip microcomputer through BemfU, bemfV, and BemfV after passing through a voltage dividing network, only two phases (U phase and V phase) are conducted in each operating state, a third phase (W phase) is in a floating state and is used to detect a counter-electromotive-force zero-crossing point, and after the counter-electromotive-force zero-crossing point is detected, a corresponding delay time is set according to an electrical angle that a phase-change point lags behind the zero-crossing point by 30 ° and, when the delay time is reached, the motor phase-change enters the next operating state.
Hedge trimmer control system, judge the blade of hedge trimmer through motor back electromotive force detection circuitry and turn to whether normally whether to be blocked with this blade of judging the hedge trimmer.
Optionally, the power supply voltage detection circuit includes a ninth resistor, a tenth resistor, an eleventh resistor, and a third capacitor, the ninth resistor is connected in series with the eleventh resistor, the tenth resistor is connected in parallel between the ninth resistor and the eleventh resistor, the third capacitor is connected in parallel with the tenth resistor, and the tenth resistor is connected to the VDC interface.
Specifically, the power supply voltage detection circuit is used for detecting the voltage in the circuit when the motor works normally.
For example, as shown in fig. 9, a ninth resistor in the power supply voltage detection circuit is a resistor R25, a tenth resistor is a resistor R28, an eleventh resistor is a resistor R33, and a third capacitor is a capacitor C18, the power supply voltage detection circuit is connected to a pin G1CH5 of the single chip, when the motor works normally, the input voltage is measured by sensing a current flowing through two ends of the resistor, and a maximum voltage allowed to be input in the circuit is 80V.
Hedge trimmer control system, whether normal through the motor voltage that mains voltage detection circuit detected being worked to this judges hedge trimmer whether normal work.
Optionally, the hardware overcurrent value detection circuit includes a twelfth resistor, a thirteenth resistor, and a fourth capacitor, where the twelfth resistor is connected in series with the thirteenth resistor, the fourth capacitor is connected in parallel with the thirteenth resistor, and the fourth capacitor is connected to the overtcset interface.
Specifically, in this embodiment, as shown in fig. 10, the twelfth resistor, the thirteenth resistor, and the fourth capacitor in the hardware overcurrent value detection circuit are resistors R26, R31, and C17, respectively, and the hardware overcurrent value detection circuit is used to perform overcurrent protection on the output current, where the resistor R26 is used to limit the current.
Hedge trimmer control system, overflow value detection circuit through the hardware and carry out overcurrent protection to the electric current of exporting, avoid overflowing to lead to the device to burn out so that the circuit board damages.
Optionally, the DCDC voltage-reducing circuit includes a feedback suppressor and a voltage-regulator tube, the DCDC voltage-reducing circuit is externally connected with direct current, the direct current reduces voltage through the feedback suppressor to output voltage, and the voltage-regulator tube is connected with an input end of the DCDC voltage-reducing circuit.
Specifically, in this embodiment, as shown in fig. 11, the current path when the switch is turned on is input from the positive electrode, flows through the inductor L1 and the capacitor C26 to form a closed loop 1, and the current path when the switch is turned off is input from the positive electrode to form a closed loop 2 by the inductor L1, the capacitor C26 and the diode D6; the DCDC voltage reduction circuit provides direct current and outputs the direct current through the voltage reduction of the feedback suppressor to supply power for the whole circuit, and the voltage-stabilizing tube ZD1 is connected with the input end of the DCDC voltage reduction circuit, and the voltage-stabilizing tube ZD1 plays a role in limiting the potential, prevents that the communication signal potential is too high, damages the circuit, and the voltage of DCDC voltage reduction circuit output is 56V direct current.
Hedge trimmer control system, through setting up the stabilivolt of being connected with DCDC step-down circuit's input, prevent that the communication signal electric potential is too high, damage the circuit to be favorable to the circuit stability among the hedge trimmer control system, step down input voltage through DCDC step-down circuit, for whole circuit power supply.
Optionally, the motor driving circuit includes a driving chip and a power tube, the driving chip is connected to the power tube, and an output end of the power tube is connected to the motor back electromotive force detection circuit.
Specifically, the motor driving circuit amplifies power through the driving chip and the power tube, increases current input quantity and output quantity, and drives the motor to normally work.
For example, as shown in fig. 12, the motor drive circuit is composed of six power tubes (Q2, Q3, Q4, Q5, Q6, Q7) and a mos drive chip; the HO1 pin and the LO1 pin of the mos drive chip control the grids of a power tube Q2 and a power tube Q3 through a resistor R16 and a resistor R19; an HO2 pin and an LO2 pin of the mos drive chip control the grids of a power tube Q4 and a power tube Q5 through a resistor R21 and a resistor R22; an HO3 pin and an LO3 pin of the mos driver chip control the grids of a power tube Q6 and a power tube Q7 through a resistor R29 and a resistor R37; when the singlechip outputs high level, the high level is supplied to an LIN1 pin and an LIN2 pin of an EG3033 chip, and MOS (metal oxide semiconductor) transistors of Q1 and Q2 are conducted; if the output of the singlechip is low level, the MOS transistors of Q1 and Q2 are cut off;
when the single chip outputs high level, the high level is supplied to an HO1 pin and an LO1 pin of the MOS drive chip, and MOS (metal oxide semiconductor) transistors of Q2 and Q3 are conducted; if the output of the singlechip is low level, the MOS transistors of Q2 and Q3 are cut off; the single chip controls a motor driving circuit consisting of 6 MOS tubes by means of a MOS driving chip. The specific work performance is as follows:
firstly, the singlechip outputs high level to HO1 pin and LO1 pin of MOS drive chip to make MOS transistors of Q2 and Q3 conducted and the motor rotates forwards;
secondly, the singlechip outputs high level to HO2 pin and LO2 pin of the MOS drive chip, so that MOS (metal oxide semiconductor) transistors of Q3 and Q4 are conducted, and the motor rotates reversely;
the single chip outputs high level to HO3 pin and LO3 pin of MOS drive chip to make MOS tubes of Q5 and Q6 conducted, and the MOS tubes of Q5 and Q6 are connected with current detection circuit via AGND interface for driving the current detection circuit.
The VCC pin is a power supply pin of the chip, and the working range is between 5.5V and 36V, and in this embodiment, 12V working voltage is selected. The 7 pin 5V of the chip is the power supply output pin, and the output voltage is 5V.
Hedge trimmer control system, be used for amplified power through motor drive circuit, increase the terminal current output quantity and the output quantity of electric current, normally work through motor drive circuit driving motor.
The utility model also provides a hedge trimmer, including the motor and as above hedge trimmer control system, the motor with hedge trimmer control system links to each other. The advantages of the hedge trimmer and the hedge trimmer control system are the same compared with the prior art, and are not described herein again.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present disclosure.
Claims (10)
1. A hedge trimmer control system is characterized by comprising a detection circuit, a communication circuit, an alarm circuit, a DCDC voltage reduction circuit and a motor driving circuit;
the detection circuit is connected with the communication circuit and is used for detecting current and voltage and sending the current and voltage to the communication circuit;
the detection circuit comprises a current detection circuit, a motor back electromotive force detection circuit, a power supply voltage detection circuit and a hardware overcurrent value detection circuit;
the communication circuit is connected with the alarm circuit and is used for sending a corresponding alarm signal to the alarm circuit when the current detection circuit detects that the current exceeds a rated load current set value, wherein the alarm circuit is used for carrying out buzzing alarm after receiving the alarm signal;
the DCDC voltage reduction circuit is connected with the communication circuit and is used for reducing the voltage input to the detection circuit, the communication circuit, the alarm circuit and the motor drive circuit so as to supply power to the detection circuit, the communication circuit, the alarm circuit and the motor drive circuit;
the motor driving circuit is connected with the motor back electromotive force detection circuit and the current detection circuit, and the motor driving circuit is used for driving the motor to reversely run after the alarm circuit performs buzzing alarm.
2. The hedge trimmer control system of claim 1, wherein the communication circuit comprises a first chip and a second chip, the first chip being connected to the second chip;
the first chip is externally provided with a first resistor and a second resistor, the first resistor is connected with the SWD _ CLK interface, the second resistor is connected with the SWD _ IO interface, and the second chip is externally connected with a power supply key and connected with the DCDC voltage reduction circuit.
3. The hedge trimmer control system according to claim 1, wherein the alarm circuit comprises a first diode and a first triode, the first diode is used for unidirectional conduction, a third resistor is arranged outside the first triode, the third resistor is connected with the Buzzer interface, and the triode Q1 is used for amplifying a signal to reach the power responding to the Buzzer BUZ 1.
4. The hedge trimmer control system of claim 1, wherein the current detection circuit comprises a capacitive current detection unit and a heating current detection unit;
the capacitance current detection unit comprises a fourth resistor, a fifth resistor and a first capacitor, wherein the fourth resistor is connected with the first capacitor in series, and the fifth resistor is connected between the fourth resistor and the first capacitor in parallel and is connected with the IPeak interface;
the temperature-rising current detection unit comprises a sixth resistor, a seventh resistor, an eighth resistor and a second capacitor, the seventh resistor is connected with the eighth resistor in series, the sixth resistor is connected between the seventh resistor and the eighth resistor in parallel, and the second capacitor is connected with the seventh resistor in parallel and is connected with the IRms interface.
5. A hedge trimmer control system according to claim 1, wherein the motor back emf detection circuit is connected to the motor three wires.
6. A hedge trimmer control system according to claim 1, wherein the supply voltage detection circuit comprises a ninth resistor, a tenth resistor, an eleventh resistor and a third capacitor, the ninth resistor being connected in series with the eleventh resistor, the tenth resistor being connected in parallel between the ninth resistor and the eleventh resistor, the third capacitor being connected in parallel with the tenth resistor, the tenth resistor being connected to the VDC interface.
7. The hedge trimmer control system of claim 1, wherein the hardware over-current value detection circuit comprises a twelfth resistor, a thirteenth resistor and a fourth capacitor, the twelfth resistor is connected in series with the thirteenth resistor, the fourth capacitor is connected in parallel with the thirteenth resistor, and the fourth capacitor is connected to an OVCset interface.
8. The hedge trimmer control system of claim 1, wherein the DCDC voltage reduction circuit comprises a feedback suppressor and a voltage regulator tube, the DCDC voltage reduction circuit is externally connected with direct current, the direct current reduces the voltage through the feedback suppressor to output the voltage, and the voltage regulator tube is connected with an input end of the DCDC voltage reduction circuit.
9. The hedge trimmer control system of claim 1, wherein the motor drive circuit comprises a drive chip and a power tube, the drive chip is connected with the power tube, and an output end of the power tube is connected with the motor back electromotive force detection circuit.
10. A hedge trimmer comprising an electric motor and a hedge trimmer control system according to any one of claims 1 to 9, the electric motor being connected to the hedge trimmer control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222472258.4U CN218526251U (en) | 2022-09-19 | 2022-09-19 | Hedge trimmer control system and hedge trimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222472258.4U CN218526251U (en) | 2022-09-19 | 2022-09-19 | Hedge trimmer control system and hedge trimmer |
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| Publication Number | Publication Date |
|---|---|
| CN218526251U true CN218526251U (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222472258.4U Active CN218526251U (en) | 2022-09-19 | 2022-09-19 | Hedge trimmer control system and hedge trimmer |
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| CN (1) | CN218526251U (en) |
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2022
- 2022-09-19 CN CN202222472258.4U patent/CN218526251U/en active Active
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