CN110630109B - Intelligent lock motor control circuit and control method - Google Patents
Intelligent lock motor control circuit and control method Download PDFInfo
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- CN110630109B CN110630109B CN201911044763.5A CN201911044763A CN110630109B CN 110630109 B CN110630109 B CN 110630109B CN 201911044763 A CN201911044763 A CN 201911044763A CN 110630109 B CN110630109 B CN 110630109B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000033001 locomotion Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 22
- 238000010586 diagram Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000005252 bulbus oculi Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/005—Opening, closing of the circuit
Landscapes
- Control Of Direct Current Motors (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention discloses an intelligent lock motor control circuit and a method, wherein the control circuit comprises a micro control unit, a control unit and a control unit, wherein the micro control unit is used for receiving an opening/closing signal and generating modulation signals with different duty ratios according to the opening/closing signal; the pulse width modulation circuit is connected with the signal output port of the micro control unit, and the on/off state of the pulse width modulation circuit is controlled to provide different level signals for the driving circuit according to the duty ratio of the modulation signal transmitted by the micro control unit; and the input end of the driving circuit is connected with the pulse width modulation circuit, the output end of the driving circuit is connected with a motor, and the forward and reverse movement of the motor is controlled according to different level signals provided by the pulse width modulation circuit, so that the door opening or locking action of the intelligent lock is realized. The invention can control the on or off state of the pulse width modulation circuit when the micro control unit outputs the PWM modulation signal, thereby controlling the motor to rotate positively and negatively and improving the use safety of the intelligent lock.
Description
Technical Field
The invention relates to the field of intelligent lock driving, in particular to an intelligent lock motor control circuit and a control method.
Background
At present, along with the rapid development of the intelligent home industry, the intelligent door lock also gradually goes deep into the daily life of people. The intelligent lock is used as a safety guard of a family, and the safety and reliability of the intelligent lock are important. In order to achieve the aim of controlling only users, most intelligent locks in the market at present adopt a controller to control the running state of a motor, and recognition devices such as fingerprints or passwords are added on the intelligent locks, and when the recognition devices are successfully verified, the controller can acquire door opening and closing signals so as to control the motor to drive to realize door opening or locking.
However, the lock body motor control technology adopted in the existing intelligent lock is a circuit in which an MCU controller is directly connected with a motor driving chip, and the MCU controller is easy to be in error contact under severe external interference so as to output high and low levels, so that a motor connected with the MCU controller can perform operation reaction on the high and low levels generated by misoperation, and the false triggering motor is out of control, so that the safety of the intelligent lock is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide an intelligent lock motor control circuit which can improve the use safety of an intelligent lock.
The second purpose of the invention is to provide a control method of the intelligent lock motor.
One of the purposes of the invention is realized by adopting the following technical scheme:
an intelligent lock motor control circuit, comprising:
the micro control unit is in charge of receiving the opening/closing signals and generating modulation signals with different duty ratios according to the opening/closing signals;
the pulse width modulation circuit is connected with the signal output port of the micro control unit, and the on/off state of the pulse width modulation circuit is controlled to provide different level signals for the driving circuit according to the duty ratio of the modulation signal transmitted by the micro control unit;
and the input end of the driving circuit is connected with the pulse width modulation circuit, the output end of the driving circuit is connected with a motor, and the forward and reverse movement of the motor is controlled according to different level signals provided by the pulse width modulation circuit, so that the door opening or locking action of the intelligent lock is realized.
Further, the pulse width modulation circuit comprises four paths of PWM signal input units, wherein PWM1 and PWM2 signal input units are connected with a first input port of the driving circuit, PWM3 and PWM4 signal input units are connected with a second input port of the driving circuit, the PWM1 signal input unit and the PWM3 signal input unit have the same structure, and the PWM2 signal input unit and the PWM4 signal input unit have the same structure.
Further, the PWM1 signal input unit includes a capacitor C1, a resistor R2, and a PNP type triode Q1, where the modulation signal is input to the capacitor C1 through a signal output port of the micro control unit, the capacitor C1 is connected in series with the resistor R2 and connected to a base of the triode Q1, one pin of the resistor R1 is connected to a power supply, the other pin is connected to the base of the triode Q1, an emitter of the triode Q1 is connected to the power supply, and a collector of the triode Q1 is connected to a first input port of the driving circuit.
Further, the PWM2 signal input unit includes a capacitor C2, a resistor R3, a resistor R4, and an NPN type triode Q2, the modulation signal is input to the capacitor C2 through a signal output port of the micro control unit, the capacitor C2 is connected in series with the resistor R3 and is connected to a base of the triode Q2, one pin of the resistor R4 is connected to the base of the triode Q2, the other pin is grounded, a collector of the triode Q2 is connected to a collector of the triode Q1 of the PWM1 signal input unit, and an emitter of the triode Q2 is grounded.
Further, two input ports of the driving circuit are connected with two-way voltage stabilizing diodes.
Further, the door opening/closing signal is generated by one or more modules of a biometric identification module, a password identification module, a card swiping identification module or a terminal identification module connected with the micro control unit.
The second purpose of the invention is realized by adopting the following technical scheme:
the intelligent lock motor control method is applied to the intelligent lock motor control circuit, and comprises the following steps:
step S1: receiving an open/close door signal;
step S2: generating two corresponding PWM signals according to the on/off signals, and acquiring the duty ratio of the two PWM signals;
step S3: two paths of pulse width modulation circuits corresponding to the two paths of PWM signals are respectively controlled to be conducted according to different duty ratios, so that the level states of two input ends of the driving circuit are controlled;
step S4: the driving circuit controls the forward rotation or the reverse rotation of the motor according to the level state of the input end of the driving circuit, so that the door opening or the door locking action of the intelligent lock is realized.
Further, in the step S2, if the door opening signal is received, the two paths of PWM signals generated are a PWM1 signal with a low duty ratio and a PWM4 signal with a high duty ratio; if the door closing signal is received, a high duty cycle PWM2 signal and a low duty cycle PWM3 signal are generated.
Further, the pulse width modulation circuit conduction control method in the step S3 is as follows: if the door opening signal is received, the triode Q1 in the PWM1 signal input unit is conducted by the PWM1 signal with low duty ratio, and a high level is provided for the first input end of the driving circuit; the high-duty-cycle PWM4 signal enables the triode Q4 in the PWM4 signal input unit to be conducted, and provides a low level for the second input end of the driving circuit; if the door closing signal is received, the triode Q2 in the PWM2 signal input unit is conducted by the PWM2 signal with high duty ratio, and a low level is provided for the first input end of the driving circuit; the low duty cycle PWM3 signal turns on transistor Q3 in the PWM3 signal input unit, providing a high level to the second input of the drive circuit.
Further, in the step S4, the method for controlling the motor to rotate in forward and reverse directions according to the level state includes: if the first input end of the driving circuit is at a high level and the second input end of the driving circuit is at a low level, the driving motor rotates positively to realize door opening action; if the first input end of the driving circuit is at a low level and the second input end of the driving circuit is at a high level, the driving motor is reversely rotated, and the door locking action is realized.
Compared with the prior art, the invention has the beneficial effects that:
the micro control unit can control the on or off state of the pulse width modulation circuit when outputting the PWM modulation signal, thereby controlling the driving circuit to drive the motor to rotate in the forward and reverse directions, avoiding the motor from being out of control caused by the error triggering of the high and low output level of the micro control unit, and improving the use safety of the intelligent lock.
Drawings
FIG. 1 is a schematic diagram of signal transmission of a motor control circuit of an intelligent lock of the present invention;
fig. 2 is a circuit connection diagram of the intelligent lock motor control circuit of the invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
An intelligent lock motor control circuit is used for controlling a motor in an intelligent lock, so that intelligent control of the motor is more stable, and safety of the intelligent lock is improved.
As shown in fig. 1 and 2, the control circuit includes a micro control unit, i.e., an MCU controller, and the intelligent lock realizes the function of controlling the lock switch in real time through the MCU controller.
The MCU controller is connected with the identity recognition module in the intelligent lock, wherein the identity recognition module can be set as a fingerprint, voice or eyeball biological recognition module, a card swiping module, a password module or a mobile phone terminal module and the like, and after the identity recognition module successfully verifies the identity information of the user, a door opening or closing signal can be sent to the MCU controller. After receiving the door opening or closing signal, the MCU controller can generate modulation signals with different duty ratios, namely PWM signals, according to different signals.
The signal output port of the MCU controller is connected with the pulse width modulation circuit, wherein the pulse width modulation circuit is a PWM control circuit; the MCU controller can control the pulse width modulation circuit to be in an on or off state when outputting a PWM signal; in this embodiment, the pulse width modulation circuit includes four paths of PWM signal input units, where the PWM1 and PWM2 signal input units are connected to the first input port INA of the driving circuit, the PWM3 and PWM4 signal input units are connected to the second input port INB of the driving circuit, and different PWM signal input units are turned on, so as to provide different level signals for two different input ports of the driving circuit, and the output end of the driving circuit is connected to a motor, and the driving circuit realizes a forward rotation or reverse rotation effect according to different level states, so as to complete the door opening or locking action of the intelligent lock.
In this embodiment, the PWM1 signal input unit has the same structure as the PWM3 signal input unit, and the PWM2 signal input unit has the same structure as the PWM4 signal input unit.
The PWM1 signal input unit comprises a capacitor C1, a resistor R2 and a PNP triode Q1, wherein the modulating signal is input into the capacitor C1 through a signal output port of the micro control unit, the capacitor C1 plays a role in alternating current and direct current blocking, and the capacitor C1 can only be used when the MCU controller outputs the PWM signal; the capacitor C1 is connected in series with the resistor R2 and is connected with the base electrode of the triode Q1, one pin of the resistor R1 is connected with a 3.3V power supply, the other pin of the resistor R1 is connected with the base electrode of the triode Q1, the emitting electrode of the triode Q1 is connected with the power supply, and the collecting electrode of the triode Q1 is connected with the first input port of the driving circuit; when the signal input by the PWM1 signal input unit is a PWM signal with low duty ratio, the triode Q1 can be conducted, and a high level is provided for a first input port INA of the driving circuit; if the input signal is a PWM signal with a high duty ratio, the transistor Q1 is turned off and is turned off.
The PWM4 signal input unit comprises a capacitor C7, a resistor R9, a resistor R10 and an NPN triode Q4, wherein the modulation signal is input into the capacitor C7 through a signal output port of the micro control unit, and the capacitor C7 has the same function as the capacitor C1 and also has the function of alternating and straightening; the capacitor C7 is connected in series with the resistor R9 and is connected to the base electrode of the triode Q4, one pin of the resistor R10 is connected with the base electrode of the triode Q4, the other pin is grounded, the emitter electrode of the triode Q2 is grounded, and the collector electrode of the triode Q4 is connected to the second input port INB of the driving circuit; when the signal input by the PWM4 signal input unit is a PWM signal with high duty ratio, the triode Q4 is conducted, and a low-level signal is provided for a second input port INB of the driving circuit; if the input signal is a PWM signal with a low duty cycle, transistor Q4 is turned off.
Therefore, after the MCU controller receives the door opening signal, two paths of PWM signals are generated, that is, PWM1 signals with low duty ratio are input to the PWM1 signal input unit, and PWM4 signals with high duty ratio are input to the PWM4 signal input unit, so that the first input port INA and the second input port INB of the driving circuit obtain high-level and low-level signals respectively, thereby driving the motor to rotate forward and realizing door opening action.
Similarly, the PWM2 signal input unit and the PWM4 signal input unit have the same structure, and the difference between them is that the collector of the triode Q2 in the PWM2 signal input unit is connected to the first input port INA of the driving circuit; the PWM3 signal input unit has the same structure as the PWM1 signal input unit, and the collector of the triode Q3 in the PWM3 signal input unit is connected to the second input port INB of the driving circuit.
When the MCU controller receives a door closing signal, two paths of PWM signals PWM2 and PWM3 are generated; PWM2 is a PWM signal with high duty ratio, so that triode Q2 is conducted, PWM3 is a PWM signal with low duty ratio, and triode Q3 is conducted; at this time, the input ends INA and INB of the driving circuit respectively obtain low-level signals and high-level signals to drive the lock body motor to rotate reversely, so that the door is locked.
In addition, in order to stabilize the circuit voltage, bidirectional zener diodes are connected to both of the two input ports of the driving circuit, the voltage output end of the driving circuit, and the like.
The PWM control circuit in the embodiment plays a role in switching on and switching off, and can control the on and off states of the triode only when the MCU controller outputs PWM signals, so that the driving circuit is controlled to drive the motor to rotate in the forward and reverse directions. If the MCU controller only outputs high and low levels, the on-off state of the triode cannot be changed, and the motor motion state cannot be changed, so that the MCU can not be triggered to change the level state of the input end of the motor driving chip by mistake even if the MCU is triggered to output the high and low levels by mistake or the program runs and flies under severe external interference, the working state of the motor cannot be changed by mistake, and the use safety of the intelligent lock is enhanced.
Example two
An intelligent lock motor control method applied to the intelligent lock motor control circuit according to the first embodiment includes:
step S1: receiving an open/close door signal; the door opening/closing signal is sent by an identity recognition module on the intelligent lock, and the door opening or closing signal can be generated after the identity recognition module successfully verifies the identity of a user.
Step S2: generating two corresponding PWM signals according to the on/off signals, and acquiring the duty ratio of the two PWM signals;
in the first embodiment, the pulse width modulation circuit includes four PWM signal input units, and the output end of the micro control unit is connected to the four PWM signal input units, when the micro control unit receives the door opening signal, the two PWM signals generated are a PWM1 signal with a low duty ratio and a PWM4 signal with a high duty ratio, wherein the PWM1 signal correspondingly flows through the PWM1 signal input unit, and the PWM4 signal flows through the PWM4 signal input unit; if the door closing signal is received, a PWM2 signal with high duty ratio and a PWM3 signal with low duty ratio are generated, wherein the PWM2 signal correspondingly flows through the PWM2 signal input unit, and the PWM3 signal flows through the PWM3 signal input unit.
Step S3: two paths of pulse width modulation circuits corresponding to the two paths of PWM signals are respectively controlled to be conducted according to different duty ratios, so that the level states of two input ends of the driving circuit are controlled;
if the door opening signal is received, the triode Q1 in the PWM1 signal input unit is conducted by the PWM1 signal with low duty ratio, and a high level is provided for the first input end of the driving circuit; the high-duty-cycle PWM4 signal enables the triode Q4 in the PWM4 signal input unit to be conducted, and provides a low level for the second input end of the driving circuit; if the door closing signal is received, the triode Q2 in the PWM2 signal input unit is conducted by the PWM2 signal with high duty ratio, and a low level is provided for the first input end of the driving circuit; the low duty cycle PWM3 signal turns on transistor Q3 in the PWM3 signal input unit, providing a high level to the second input of the drive circuit.
Step S4: the driving circuit controls the forward rotation or the reverse rotation of the motor according to the level state of the input end of the driving circuit, so that the door opening or the door locking action of the intelligent lock is realized.
If the first input end of the driving circuit is at a high level and the second input end of the driving circuit is at a low level, the driving motor rotates positively to realize door opening action; if the first input end of the driving circuit is at a low level and the second input end of the driving circuit is at a high level, the driving motor is reversely rotated, and the door locking action is realized.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (7)
1. An intelligent lock motor control circuit, characterized by comprising:
the micro control unit is in charge of receiving the opening/closing signals and generating modulation signals with different duty ratios according to the opening/closing signals;
the pulse width modulation circuit is connected with the signal output port of the micro control unit, and the on/off state of the pulse width modulation circuit is controlled to provide different level signals for the driving circuit according to the duty ratio of the modulation signal transmitted by the micro control unit;
the input end of the driving circuit is connected with the pulse width modulation circuit, the output end of the driving circuit is connected with a motor, and forward and reverse movement of the motor is controlled according to different level signals provided by the pulse width modulation circuit, so that door opening or door locking actions of the intelligent lock are realized;
the pulse width modulation circuit comprises four paths of PWM signal input units, wherein PWM1 and PWM2 signal input units are connected with a first input port of the driving circuit, PWM3 and PWM4 signal input units are connected with a second input port of the driving circuit, the PWM1 signal input unit and the PWM3 signal input unit have the same structure, and the PWM2 signal input unit and the PWM4 signal input unit have the same structure;
the PWM1 signal input unit comprises a capacitor C1, a resistor R2 and a PNP type triode Q1, wherein a modulation signal is input into the capacitor C1 through a signal output port of the micro control unit, the capacitor C1 is connected with the resistor R2 in series and is connected with a base electrode of the triode Q1, one pin of the resistor R1 is connected with a power supply, the other pin of the resistor R1 is connected with the base electrode of the triode Q1, an emitter electrode of the triode Q1 is connected with the power supply, and a collector electrode of the triode Q1 is connected with a first input port of the driving circuit;
the PWM2 signal input unit comprises a capacitor C2, a resistor R3, a resistor R4 and an NPN triode Q2, wherein a modulation signal is input into the capacitor C2 through a signal output port of the micro control unit, the capacitor C2 is connected with the resistor R3 in series and is connected with a base electrode of the triode Q2, one pin of the resistor R4 is connected with the base electrode of the triode Q2, the other pin is grounded, a collector electrode of the triode Q2 is connected with a collector electrode of a triode Q1 in the PWM1 signal input unit, and an emitter electrode of the triode Q2 is grounded.
2. The intelligent lock motor control circuit according to claim 1, wherein both input ports of the drive circuit are connected with a zener diode.
3. The intelligent lock motor control circuit according to claim 1, wherein the open/close door signal is generated by one or more modules selected from a biometric module, a password module, a swipe card module, and a terminal module connected to the micro control unit.
4. An intelligent lock motor control method applied to the intelligent lock motor control circuit as claimed in any one of claims 1 to 3, comprising:
step S1: receiving an open/close door signal;
step S2: generating two corresponding PWM signals according to the on/off signals, and acquiring the duty ratio of the two PWM signals;
step S3: two paths of pulse width modulation circuits corresponding to the two paths of PWM signals are respectively controlled to be conducted according to different duty ratios, so that the level states of two input ends of the driving circuit are controlled;
step S4: the driving circuit controls the forward rotation or the reverse rotation of the motor according to the level state of the input end of the driving circuit, so that the door opening or the door locking action of the intelligent lock is realized.
5. The intelligent lock motor control method according to claim 4, wherein in the step S2, if the door opening signal is received, the two paths of PWM signals generated are a low duty ratio PWM1 signal and a high duty ratio PWM4 signal; if the door closing signal is received, a high duty cycle PWM2 signal and a low duty cycle PWM3 signal are generated.
6. The intelligent lock motor control method according to claim 4, wherein the pulse width modulation circuit on control method in step S3 is as follows: if the door opening signal is received, the triode Q1 in the PWM1 signal input unit is conducted by the PWM1 signal with low duty ratio, and a high level is provided for the first input end of the driving circuit; the high-duty-cycle PWM4 signal enables the triode Q4 in the PWM4 signal input unit to be conducted, and provides a low level for the second input end of the driving circuit; if the door closing signal is received, the triode Q2 in the PWM2 signal input unit is conducted by the PWM2 signal with high duty ratio, and a low level is provided for the first input end of the driving circuit; the low duty cycle PWM3 signal turns on transistor Q3 in the PWM3 signal input unit, providing a high level to the second input of the drive circuit.
7. The intelligent lock motor control method according to claim 4, wherein the method for controlling the forward and reverse rotation of the motor according to the level state in the step S4 is as follows: if the first input end of the driving circuit is at a high level and the second input end of the driving circuit is at a low level, the driving motor rotates positively to realize door opening action; if the first input end of the driving circuit is at a low level and the second input end of the driving circuit is at a high level, the driving motor is reversely rotated, and the door locking action is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911044763.5A CN110630109B (en) | 2019-10-30 | 2019-10-30 | Intelligent lock motor control circuit and control method |
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| CN201911044763.5A CN110630109B (en) | 2019-10-30 | 2019-10-30 | Intelligent lock motor control circuit and control method |
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| CN110630109B true CN110630109B (en) | 2024-03-26 |
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| CN112353280A (en) * | 2020-10-23 | 2021-02-12 | 深圳市凡事宝科技有限公司 | Soap dispenser capable of controlling liquid outlet amount through distance between hand and sensor |
| CN113685302B (en) * | 2021-08-10 | 2022-09-30 | 科世达(上海)机电有限公司 | Vehicle IGN power-off method and control circuit capable of preventing false triggering |
| CN114251024B (en) * | 2021-12-21 | 2023-03-03 | 恩坦华汽车零部件（镇江）有限公司 | PWM control-introduced self-closing automobile back door lock |
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