CN113363940A - Electronic lock double-protection method and system - Google Patents
Electronic lock double-protection method and system Download PDFInfo
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- CN113363940A CN113363940A CN202110613806.8A CN202110613806A CN113363940A CN 113363940 A CN113363940 A CN 113363940A CN 202110613806 A CN202110613806 A CN 202110613806A CN 113363940 A CN113363940 A CN 113363940A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005070 sampling Methods 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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Abstract
The invention provides a double protection method and a double protection system for an electronic lock, which comprise the following steps: initializing a motor of the electronic lock to a zero position; judging whether the motor rotates forwards or not, if so, rotating forwards, and if not, rotating backwards; when the motor rotates forwards, detecting the current value I1 of the forward rotation of the motor, and calculating a forward rotation voltage value U1; when the motor rotates reversely, detecting a current value I2 of the reverse rotation of the motor, and calculating a reverse rotation voltage value U2; when the motor rotates forwards, whether the forward rotation voltage value U1 is larger than or equal to the forward rotation locked-rotor voltage value U3 within the set time t1 is judged, and if yes, the motor is turned off; if not, the motor fault alarm is carried out, and the motor is turned off at the same time. The invention divides the locked rotor within a certain time by combining the electronic locked rotor current and the action time, thereby distinguishing whether the locked rotor is reasonable or not, further reducing the probability of overload and jamming of the motor and ensuring that the mechanism works more stably and reliably.
Description
Technical Field
The invention relates to the technical field of electronic locks, in particular to a double protection method and a double protection system for an electronic lock.
Background
At present, two control modes of a motor type electronic lock are provided, namely action time control and locked rotor current control. Time control is commonly used in mechanisms with in-place detection signals, and locked-rotor current control is relatively common, and refer to an electronic lock head device which uses a motor to lock rotor and is disclosed as CN207863638U, wherein the electronic lock head device comprises a shell and a locking mechanism arranged in the shell, and a lock hole is arranged in the shell; the locking mechanism comprises a motor, a cam, a lock pin and a spring, the cam is installed on a main shaft of the motor, the lock pin is arranged in an installation space of the locking mechanism in a sliding mode, the inner end of the lock pin extends into a lock hole, the spring is arranged between the outer end of the lock pin and the shell, a groove is formed in the side face of the lock pin, the cam is arranged in the groove, the groove wall on the outer side of the groove is tightly attached to the surface of the cam, and a motor rotation blocking structure is arranged between the cam and the shell. Although the application has no in-place detection signal, the mechanism is relatively simple, the cost is more advantageous, the reliability is relatively poor, and the situation that the card is dead and can not reach the position is common.
Disclosure of Invention
The invention solves the problem that the existing motor type electronic lock is easy to be locked and not in place, and provides an electronic lock double protection method and a system.
In order to realize the purpose, the following technical scheme is provided:
a double protection method for an electronic lock comprises the following steps:
s1, initializing a motor of the electronic lock to a zero position;
s2, judging whether the motor rotates forwards or not, if so, rotating the motor forwards, and if not, rotating the motor backwards;
s3, detecting the current value I1 of the motor forward rotation when the motor forward rotation, and calculating the forward rotation voltage value U1; when the motor rotates reversely, detecting a current value I2 of the reverse rotation of the motor, and calculating a reverse rotation voltage value U2;
s4, when the motor rotates forwards, whether the forward rotation voltage value U1 is larger than or equal to the forward rotation locked-rotor voltage value U3 within the set time t1 is judged, if yes, the motor is turned off, and the step S1 is returned; if not, performing motor fault alarm and simultaneously closing the motor;
when the motor rotates reversely, judging whether the reverse rotation voltage value U2 is larger than or equal to the reverse rotation locked-rotor voltage value U4 within the set time t2, if so, turning off the motor, and returning to the step S1; if not, the motor fault alarm is carried out, and the motor is turned off at the same time.
The core of this application is locked current subdivision and adds time control, and motor corotation corresponds with the reversal and is equipped with corresponding locked voltage threshold value and time threshold value, no matter motor corotation or reversal, as long as gather motor operating voltage in its time threshold value that corresponds and be greater than the locked voltage threshold value that corresponds, think motor locked switch promptly and target in place to close the motor immediately, prevent that the motor from transshipping and die with the card, also avoid simultaneously to close the condition emergence that the lock is not target in place. And when the corresponding time threshold value is exceeded, the motor is still not blocked, the motor is considered to be in fault, the motor is immediately turned off, the invalid action of the motor is prevented, the motor fault alarm is carried out, and a user is reminded to overhaul the electronic lock.
Preferably, the step of acquiring the set time t1 and the set time t2 includes:
s401, after the electronic lock is installed, entering a debugging mode, and initializing a motor of the electronic lock to a zero position;
s402, the motor rotates forwards, and the current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0 and is 0,1,2, …, n-1, n; calculating absolute value of difference between previous and next time | I (n-1) -In |, if Δ I is less than or equal to set threshold ISIf yes, setting the time t1 to be t0 (n-1);
s403, the motor is turned off, the motor rotates reversely after 1S, and the current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0, wherein the current value Ii, i is 0,1,2, …, m-1, m; calculating absolute value of difference between the previous time and the next time, I ═ I (m-1) -Im |, if I is less than or equal to set threshold value ISThen, the time t2 is set to t0 (m-1).
The invention debugs after the installation of each electronic lock is finished, can accurately obtain the locked-rotor time of each motor, subdivides the forward rotation time and the reverse rotation time, ensures that the electronic lock is more accurately operated, and avoids overload and jamming of the locking and unlocking motor caused by errors.
Preferably, the step of acquiring the normal rotation locked voltage value U3 and the reverse rotation locked voltage value U4 includes:
s411, after the electronic lock is installed, the electronic lock enters a debugging mode, and a motor of the electronic lock is initialized to a zero position;
s412, the motor rotates forward, and obtains a current value Ii, i of the motor rotating forward at a certain time interval t0, where Ii, i is 0,1,2, …, n-1, n; calculating absolute value of difference between previous and next time | I (n-1) -In |, if Δ I is less than or equal to set threshold ISIf the positive rotation locked voltage value is U3 ═ I (n-1) R18;
s413, the motor is turned off, the motor rotates reversely after waiting for 1S, and a current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0, where Ii, i is 0,1,2, …, m-1, m; calculating absolute value of difference between the previous time and the next time, I ═ I (m-1) -Im |, if I is less than or equal to set threshold value ISIf the inversion locked-rotor voltage value U4 is equal to I (m-1) R18, the R18 is a sampling resistor.
The invention debugs after the installation of each electronic lock is finished, can accurately obtain the locked voltage threshold value of each motor, and subdivides the forward rotation time and the reverse rotation time, so that the locking and unlocking operation of the electronic lock is more accurate, and the overload and the locking of the locking and unlocking motor caused by errors are avoided.
Preferably, the set time t1 is provided with a correction coefficient a, i.e., set time t 1-at 0(n-1), the set time t2 is provided with a correction coefficient b, i.e., set time t 2-bt 0(m-1), and a and b are both greater than 1 and less than or equal to 1.5.
Preferably, the normal rotation locked voltage value U3 has a correction coefficient c, i.e., a normal rotation locked voltage value U3 ═ cI (n-1) R18, and the reverse rotation locked voltage value U4 has a correction coefficient d, i.e., a reverse rotation locked voltage value U4 ═ dI (m-1) R18, wherein c and d are both less than 1 and 0.8 or more.
The utility model provides an electronic lock duplicate protection system, is applicable to foretell electronic lock duplicate protection method, including motor drive chip, direct current motor, main control MCU, resistance R18, motor drive chip's first output pin OUT1 connects direct current motor's negative pole, motor drive chip's first output pin OUT1 connects direct current motor's positive pole, motor drive chip's first signal output pin IN1 and second signal output pin IN2 are connected with main control MCU, motor drive chip's ground connection pin GND establishes ties there is grounded resistance R18, main control MCU acquisition resistance R18's current value is as the current value of motor work, main control MCU has connect power VDD, motor drive chip's power input pin is connected with power VDD.
Preferably, the master control MCU is connected with an audible and visual alarm.
The invention has the beneficial effects that: the motor is correspondingly provided with a corresponding locked-rotor voltage threshold and a time threshold in forward rotation and reverse rotation, and the locked-rotor of the motor is considered to be in place and the motor is immediately turned off as long as the working voltage of the motor is acquired to be greater than the corresponding locked-rotor voltage threshold within the corresponding time threshold regardless of the forward rotation or the reverse rotation of the motor, so that the motor is prevented from being overloaded and locked, and the situation that the locked-rotor is not in place is avoided. And when the corresponding time threshold value is exceeded, the motor is still not blocked, the motor is considered to be in fault, the motor is immediately turned off, the invalid action of the motor is prevented, the motor fault alarm is carried out, and a user is reminded to overhaul the electronic lock.
Drawings
FIG. 1 is a flow chart of a method of an embodiment;
fig. 2 is a schematic diagram of a system diagram structure of the embodiment.
Detailed Description
Example (b):
the embodiment provides a double protection method for an electronic lock, referring to fig. 1, including the following steps:
s1, initializing a motor of the electronic lock to a zero position;
s2, judging whether the motor rotates forwards or not, if so, rotating the motor forwards, and if not, rotating the motor backwards;
s3, detecting the current value I1 of the motor forward rotation when the motor forward rotation, and calculating the forward rotation voltage value U1; when the motor rotates reversely, detecting a current value I2 of the reverse rotation of the motor, and calculating a reverse rotation voltage value U2;
s4, when the motor rotates forwards, whether the forward rotation voltage value U1 is larger than or equal to the forward rotation locked-rotor voltage value U3 within the set time t1 is judged, if yes, the motor is turned off, and the step S1 is returned; if not, performing motor fault alarm and simultaneously closing the motor;
when the motor rotates reversely, judging whether the reverse rotation voltage value U2 is larger than or equal to the reverse rotation locked-rotor voltage value U4 within the set time t2, if so, turning off the motor, and returning to the step S1; if not, the motor fault alarm is carried out, and the motor is turned off at the same time. The obtaining steps of the set time t1 and the set time t2 comprise:
s401, after the electronic lock is installed, entering a debugging mode, and initializing a motor of the electronic lock to a zero position;
s402, the motor rotates forwards, and the current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0 and is 0,1,2, …, n-1, n; calculating absolute value of difference between previous and next time | I (n-1) -In |, if Δ I is less than or equal to set threshold ISIf yes, setting the time t1 to be t0 (n-1);
s403, the motor is turned off, the motor rotates reversely after 1S, and the current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0, wherein the current value Ii, i is 0,1,2, …, m-1, m; calculating absolute value of difference between the previous time and the next time, I ═ I (m-1) -Im |, if I is less than or equal to set threshold value ISThen, the time t2 is set to t0 (m-1).
The set time t1 has a correction coefficient a, i.e., the set time t1 is at0(n-1), the set time t2 has a correction coefficient b, i.e., the set time t2 is bt0(m-1), and a and b are both greater than 1 and less than or equal to 1.5.
The steps of acquiring the positive rotation locked rotor voltage value U3 and the negative rotation locked rotor voltage value U4 comprise:
s411, after the electronic lock is installed, the electronic lock enters a debugging mode, and a motor of the electronic lock is initialized to a zero position;
s412, the motor rotates forward, and obtains a current value Ii, i of the motor rotating forward at a certain time interval t0, where Ii, i is 0,1,2, …, n-1, n; before calculationAbsolute value of time difference Δ I ═ I (n-1) -In |, if Δ I is less than or equal to set threshold ISIf the positive rotation locked voltage value is U3 ═ I (n-1) R18;
s413, the motor is turned off, the motor rotates reversely after waiting for 1S, and a current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0, where Ii, i is 0,1,2, …, m-1, m; calculating absolute value of difference between the previous time and the next time, I ═ I (m-1) -Im |, if I is less than or equal to set threshold value ISIf the inversion locked-rotor voltage value U4 is I (m-1) R18, R18 is a sampling resistor.
The forward rotation locked voltage value U3 is provided with a correction coefficient c, i.e., the forward rotation locked voltage value U3 is cI (n-1) R18, and the reverse rotation locked voltage value U4 is provided with a correction coefficient d, i.e., the reverse rotation locked voltage value U4 is dI (m-1) R18, and both c and d are less than 1 and greater than or equal to 0.8.
The core of this application is locked current subdivision and adds time control, and motor corotation corresponds with the reversal and is equipped with corresponding locked voltage threshold value and time threshold value, no matter motor corotation or reversal, as long as gather motor operating voltage in its time threshold value that corresponds and be greater than the locked voltage threshold value that corresponds, think motor locked switch promptly and target in place to close the motor immediately, prevent that the motor from transshipping and die with the card, also avoid simultaneously to close the condition emergence that the lock is not target in place. And when the corresponding time threshold value is exceeded, the motor is still not blocked, the motor is considered to be in fault, the motor is immediately turned off, the invalid action of the motor is prevented, the motor fault alarm is carried out, and a user is reminded to overhaul the electronic lock.
The invention debugs after the installation of each electronic lock is finished, can accurately obtain the locked-rotor time of each motor, subdivides the forward rotation time and the reverse rotation time, ensures that the electronic lock is more accurately operated, and avoids overload and jamming of the locking and unlocking motor caused by errors.
The invention debugs after the installation of each electronic lock is finished, can accurately obtain the locked voltage threshold value of each motor, and subdivides the forward rotation time and the reverse rotation time, so that the locking and unlocking operation of the electronic lock is more accurate, and the overload and the locking of the locking and unlocking motor caused by errors are avoided.
The embodiment further provides an electronic lock double protection system, refer to fig. 2, and is suitable for the above electronic lock double protection method, including a motor driving chip, a direct current motor, a master control MCU, and a resistor R18, where the first output pin OUT1 of the motor driving chip is connected to a negative electrode of the direct current motor, the first output pin OUT1 of the motor driving chip is connected to a positive electrode of the direct current motor, the first signal output pin IN1 and the second signal output pin IN2 of the motor driving chip are connected to the master control MCU, the ground pin GND of the motor driving chip is connected IN series to a grounded resistor R18, the master control MCU collects a current value of the resistor R18 as a current value of the motor, the master control MCU is connected to a power supply VDD, the power supply input pin of the motor driving chip is connected to the power supply VDD, and the master control MCU is connected to an audible and visual alarm.
The first signal output pin IN1 outputs a signal of '0' or '1', the second signal output pin IN2 outputs a signal of '0' or '1', when the first signal output pin IN1 outputs a signal of '1' and the second signal output pin IN2 outputs a signal of '0', the first output pin OUT1 supplies power to the direct current motor, and the motor rotates forwards; when the first signal output pin IN1 outputs the signal "0" and the second signal output pin IN2 outputs the signal "1", the second output pin OUT2 supplies power to the dc motor and the motor rotates IN reverse. The main control MCU judges whether the motor is rotating forward or rotating backward currently by receiving signals of the first signal output pin IN1 and the second signal output pin IN 2. The motor driving chip adopts the FM116B that is full, and during motor work, the electric current is through sampling resistor R18, and the AD sampling port of master control MCU is connected to PD4 sample voltage value, and the motor operating current is big more, and sample voltage value is big more.
Claims (7)
1. A double protection method for an electronic lock is characterized by comprising the following steps:
s1, initializing a motor of the electronic lock to a zero position;
s2, judging whether the motor rotates forwards or not, if so, rotating the motor forwards, and if not, rotating the motor backwards;
s3, detecting the current value I1 of the motor forward rotation when the motor forward rotation, and calculating the forward rotation voltage value U1; when the motor rotates reversely, detecting a current value I2 of the reverse rotation of the motor, and calculating a reverse rotation voltage value U2;
s4, when the motor rotates forwards, whether the forward rotation voltage value U1 is larger than or equal to the forward rotation locked-rotor voltage value U3 within the set time t1 is judged, if yes, the motor is turned off, and the step S1 is returned; if not, performing motor fault alarm and simultaneously closing the motor;
when the motor rotates reversely, judging whether the reverse rotation voltage value U2 is larger than or equal to the reverse rotation locked-rotor voltage value U4 within the set time t2, if so, turning off the motor, and returning to the step S1; if not, the motor fault alarm is carried out, and the motor is turned off at the same time.
2. The electronic lock double protection method according to claim 1, wherein the step of obtaining the set time t1 and the set time t2 comprises:
s401, after the electronic lock is installed, entering a debugging mode, and initializing a motor of the electronic lock to a zero position;
s402, the motor rotates forwards, and the current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0 and is 0,1,2, …, n-1, n; calculating absolute value of difference between previous and next time | I (n-1) -In |, if Δ I is less than or equal to set threshold ISIf yes, setting the time t1 to be t0 (n-1);
s403, the motor is turned off, the motor rotates reversely after 1S, and the current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0, wherein the current value Ii, i is 0,1,2, …, m-1, m; calculating absolute value of difference between the previous time and the next time, I ═ I (m-1) -Im |, if I is less than or equal to set threshold value ISThen, the time t2 is set to t0 (m-1).
3. The electronic lock double protection method as claimed in claim 1, wherein the step of obtaining the positive rotation locked voltage value U3 and the negative rotation locked voltage value U4 comprises:
s411, after the electronic lock is installed, the electronic lock enters a debugging mode, and a motor of the electronic lock is initialized to a zero position;
s412, the motor rotates forward, and obtains a current value Ii, i of the motor rotating forward at a certain time interval t0, where Ii, i is 0,1,2, …, n-1, n; calculating absolute value of difference between previous and next time | I (n-1) -In |, if Δ I is less than or equal to set threshold ISIf the positive rotation locked voltage value is U3 ═ I (n-1) R18;
s413, the motor is turned off, the motor rotates reversely after waiting for 1S, and a current value Ii, i of the forward rotation of the motor is obtained at a certain time interval t0, where Ii, i is 0,1,2, …, m-1, m; calculating absolute value of difference between the previous time and the next time, I ═ I (m-1) -Im |, if I is less than or equal to set threshold value ISIf the inversion locked-rotor voltage value U4 is equal to I (m-1) R18, the R18 is a sampling resistor.
4. A double protection method for an electronic lock according to claim 2, wherein the setting time t1 is provided with a correction coefficient a, i.e. setting time t 1-at 0(n-1), the setting time t2 is provided with a correction coefficient b, i.e. setting time t 2-bt 0(m-1), and a and b are both greater than 1 and less than or equal to 1.5.
5. The electronic lock double protection method according to claim 3, wherein the forward rotation locked voltage value U3 has a correction coefficient c, i.e. the forward rotation locked voltage value U3 ═ cI (n-1) R18, the reverse rotation locked voltage value U4 has a correction coefficient d, i.e. the reverse rotation locked voltage value U4 ═ dI (m-1) R18, and both c and d are less than 1 and greater than or equal to 0.8.
6. The electronic lock double protection system is suitable for the electronic lock double protection method of claim 1, and is characterized by comprising a motor drive chip, a direct current motor, a master control MCU and a resistor R18, wherein the first output pin OUT1 of the motor drive chip is connected with the negative electrode of the direct current motor, the first output pin OUT1 of the motor drive chip is connected with the positive electrode of the direct current motor, the first signal output pin IN1 and the second signal output pin IN2 of the motor drive chip are connected with the master control MCU, a grounding pin GND of the motor drive chip is connected with a grounded resistor R18 IN series, the current value of the master control MCU collecting resistor R18 is used as the current value of the motor, the master control MCU is connected with a power supply VDD, and the power supply input pin of the motor drive chip is connected with the power supply VDD.
7. The electronic lock double protection system as claimed in claim 1, wherein the master control MCU is connected with an audible and visual alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110613806.8A CN113363940A (en) | 2021-06-02 | 2021-06-02 | Electronic lock double-protection method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110613806.8A CN113363940A (en) | 2021-06-02 | 2021-06-02 | Electronic lock double-protection method and system |
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| CN113363940A true CN113363940A (en) | 2021-09-07 |
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| CN202110613806.8A Pending CN113363940A (en) | 2021-06-02 | 2021-06-02 | Electronic lock double-protection method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522818A (en) * | 2022-11-09 | 2022-12-27 | 中山亿联智能科技有限公司 | Method for prolonging service life of motor of electronic lock and avoiding locking |
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| CN1210188A (en) * | 1997-05-07 | 1999-03-10 | 马斯－汉密尔顿集团公司 | Electronic combination lock with capacitator charging circuit |
| US20080239594A1 (en) * | 2007-03-26 | 2008-10-02 | Sanyo Electric Co., Ltd. | Motor Lock Detection Circuit |
| CN103061638A (en) * | 2013-01-15 | 2013-04-24 | 北京经纬恒润科技有限公司 | Self-learning vehicle door and window controller, self-learning vehicle door and window motor locked-rotor protection method and self-learning vehicle door and window motor locked-rotor protection system |
| US20130241677A1 (en) * | 2012-03-16 | 2013-09-19 | Kenny Padro | Compact Latching Mechanism for Switched Electrical Device |
| WO2020007409A1 (en) * | 2018-07-05 | 2020-01-09 | Kiekert Ag | Lock comprising a closing device for a motor vehicle |
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2021
- 2021-06-02 CN CN202110613806.8A patent/CN113363940A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1210188A (en) * | 1997-05-07 | 1999-03-10 | 马斯－汉密尔顿集团公司 | Electronic combination lock with capacitator charging circuit |
| US20080239594A1 (en) * | 2007-03-26 | 2008-10-02 | Sanyo Electric Co., Ltd. | Motor Lock Detection Circuit |
| US20130241677A1 (en) * | 2012-03-16 | 2013-09-19 | Kenny Padro | Compact Latching Mechanism for Switched Electrical Device |
| CN103061638A (en) * | 2013-01-15 | 2013-04-24 | 北京经纬恒润科技有限公司 | Self-learning vehicle door and window controller, self-learning vehicle door and window motor locked-rotor protection method and self-learning vehicle door and window motor locked-rotor protection system |
| WO2020007409A1 (en) * | 2018-07-05 | 2020-01-09 | Kiekert Ag | Lock comprising a closing device for a motor vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522818A (en) * | 2022-11-09 | 2022-12-27 | 中山亿联智能科技有限公司 | Method for prolonging service life of motor of electronic lock and avoiding locking |
| CN115522818B (en) * | 2022-11-09 | 2024-04-09 | 中山亿联智能科技有限公司 | Method for prolonging service life of electronic lock motor and avoiding blocking |
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