CN112196376A - Intelligent key cabinet system based on Bluetooth communication and control method thereof - Google Patents
Intelligent key cabinet system based on Bluetooth communication and control method thereof Download PDFInfo
- Publication number
- CN112196376A CN112196376A CN202010802341.6A CN202010802341A CN112196376A CN 112196376 A CN112196376 A CN 112196376A CN 202010802341 A CN202010802341 A CN 202010802341A CN 112196376 A CN112196376 A CN 112196376A
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- bluetooth
- key
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- mobile phone
- controller
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- 238000004891 communication Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 64
- 238000012795 verification Methods 0.000 claims description 19
- 230000005484 gravity Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000008034 disappearance Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 108010066278 cabin-4 Proteins 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/52—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C11/00—Receptacles for purposes not provided for in groups A45C1/00-A45C9/00
- A45C11/32—Bags or wallets for holding keys
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B81/00—Cabinets or racks specially adapted for other particular purposes, e.g. for storing guns or skis
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
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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
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B73/00—Devices for locking portable objects against unauthorised removal; Miscellaneous locking devices
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2220/00—General furniture construction, e.g. fittings
- A47B2220/0091—Electronic or electric devices
Abstract
The invention discloses an intelligent key cabinet system based on Bluetooth communication.A box body is provided with a control bin and at least one storage bin for storing keys, a hook is arranged in each storage bin, the keys are hung on the hooks through key rings, the hooks are connected with electric cylinders on the back surface in the storage bins through connecting rods, the electric cylinders push the hooks to extend out of or retract into the storage bins, a controller and a Bluetooth unit are fixed in the control bin, the controller is connected with each electric cylinder through a signal wire, and the controller is connected with a Bluetooth unit through a signal wire and is communicated with a mobile phone of a user through the Bluetooth unit. The invention has the functions of sensing and judging the key inside, has the function of receiving the receipt when the key is taken away and put back temporarily, is convenient for starting and closing the system through Bluetooth connection, controls the whole process, and can ensure the sequence and the process of operation work.
Description
Technical Field
The invention relates to the technical field of electric power operation and inspection, in particular to intelligent key cabinet equipment based on Bluetooth communication.
Background
In order to ensure the safety of the operation and maintenance of the electric power of the transformer substation, keys of the transformer substation of the power company need to be managed uniformly, and at present, the transformer substation mostly adopts a key machine to manage field keys. The existing key machine needs to be operated by a key on the key machine by a field person to send an application short message to a designated manager, and then the manager authorizes the key machine and obtains the key. The mode increases the workload of operation and maintenance personnel, reduces the efficiency of operation and maintenance work, and is relatively independent of an operation ticket system, so that unified management is inconvenient.
Disclosure of Invention
The technical problem to be solved by the invention is to realize a transformer substation electric operation and maintenance key management device, which can realize authorization in an operation ticket system, so that operation and maintenance personnel can verify the authority and open a key cabinet to obtain a required key through an operation ticket mobile terminal, thereby further enhancing the safety management of the transformer substation field key, simultaneously reducing the work load of the field operation and maintenance personnel and improving the operation and maintenance efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an intelligent key cabinet system based on bluetooth communication, the box is equipped with a control bin and at least one storage compartment that is used for depositing the key, every be equipped with a couple in the storage compartment, the key passes through the key ring and hangs on the couple, the couple passes through the connecting rod and connects on the electronic jar of the interior back of storage compartment, electronic jar promotes the couple and stretches out or retract the storage compartment, control bin internal fixation has controller and bluetooth unit, every electronic jar is connected to controller passing signal line, bluetooth unit is connected to controller passing signal line to through bluetooth unit and user mobile phone communication.
The remote control device is characterized in that a power supply unit, a storage unit and a communication unit are arranged in the control bin, the controller is connected with the storage unit and the communication unit through signal lines respectively, the controller stores acquired information in the storage unit, the controller is communicated with a remote server through the communication unit, the input end of the power supply unit is connected with a mains supply through a power line, and the output end of the power supply unit is connected with a power supply interface of the controller through the power line.
Every be equipped with a backup pad on the couple, be equipped with pressure sensor between backup pad and the couple, every pressure sensor passes through signal line connection director, is equipped with a balancing weight on the key ring of placing in every storage compartment, every the weight sum of the key of hanging in the storage compartment, key ring and balancing weight is all inequality, and the difference of gravity sum each other all is greater than the setting value.
The clearance between the upper edge of the hook and the top of the inner wall of the storage bin is smaller than the outer diameter of the steel wire for manufacturing the key ring, a bin door is fixed on the front surface of the storage bin through a hinge, and a torsion spring for keeping the bin door closed is arranged in the hinge.
And a door lock unit is arranged between each bin door and the storage bin, and the controller is connected with each door lock unit through a signal line.
The box is equipped with camera and button outward, camera and button pass through signal line connection controller, the camera direction of shooing is located the one side that the box set up the door, button output starts bluetooth unit's signal to controller.
A control method based on the intelligent key cabinet system comprises the following steps:
and 6, judging whether the current storage bin information is the last defined operation, if so, closing the intelligent key cabinet system, and if not, returning to the step 2.
In the step 3, the intelligent key cabinet system packs the verification information and sends the verification information to the server to wait for obtaining the information passing the verification, and then the step 4 is executed until the server feeds back the information passing the verification, otherwise, the waiting state is maintained;
and 4, opening the door lock unit before the electric cylinder works, and closing the door lock unit after the electric cylinder works in the step 5.
The method for connecting the Bluetooth unit by the mobile phone of the user for the first time comprises the following steps:
after the key is pressed down, the Bluetooth unit works to send out a Bluetooth signal used for matching with the mobile phone of the user and maintain the set time;
the user operates the mobile phone to search the signal of the Bluetooth unit and then clicks, and the connection is completed after the verification password is input;
the Bluetooth unit records the Bluetooth name of the matched user mobile phone.
After a user scans the two-dimensional code on the box body through a mobile phone, if the mobile phone application program is not installed, the user is directly linked to the mobile phone application program for installation, and if the mobile phone application program is installed, the mobile phone application program is opened;
if two or more matched user mobile phones exist in the signal range of the Bluetooth unit, the local Bluetooth name of the mobile phone is transmitted to the Bluetooth unit through Bluetooth signals after the two-dimensional code is scanned, and the Bluetooth unit disconnects other Bluetooth users in the signal range and only connects the mobile phone user with the local Bluetooth name.
The invention has the functions of sensing and judging the key inside, has the function of receiving the receipt when the key is taken away and put back temporarily, is convenient for starting and closing the system through Bluetooth connection, controls the whole process, and can ensure the sequence and the process of operation work.
Drawings
The following is a brief description of the contents of each figure and the symbols in the figures in the description of the invention:
FIG. 1 is a schematic diagram of a smart key cabinet system;
FIG. 2 is a schematic diagram of a smart key cabinet system;
FIG. 3 is a side sectional view of a single storage compartment;
the labels in the above figures are: 1. a box body; 2. a storage bin; 3. a bin gate; 4. a control cabin; 5. a two-dimensional code label; 6. pressing a key; 7. an upper handle; 8. a gasket; 9. hooking; 10. a camera; 11. a support plate; 12. an electric cylinder; 13. a key ring.
Detailed Description
The following description of the embodiments with reference to the drawings is provided to describe the embodiments of the present invention, and the embodiments of the present invention, such as the shapes and configurations of the components, the mutual positions and connection relationships of the components, the functions and working principles of the components, the manufacturing processes and the operation and use methods, etc., will be further described in detail to help those skilled in the art to more completely, accurately and deeply understand the inventive concept and technical solutions of the present invention.
Intelligence key cabinet system is equipped with box 1, and box 1 generally is the box of cuboid or square, can fix the gasket 8 of rubber material in the side of box 1 and bottom surface for protection box 1, the top of box 1 can set up one and go up handle 7, conveniently gets and puts box 1.
The box body 1 is provided with a control bin 4 and at least one storage bin 2 for storing keys, the number of the storage bins 2 is designed according to needs, as shown in fig. 1, the storage bins 2 are 4, the structure of each storage bin 2 is the same, the control bin 4 is arranged at the top of the same, and the control bin 4 is used for fixing electronic components.
Every storage bin 2 is equipped with a couple 9, the both ends height of couple 9 is the same, both ends are all pasting storage bin 2 inner wall tops almost, the clearance along with storage bin 2 inner wall tops on couple 9 is less than the external diameter of making key ring 13 steel wire, the clearance is used for making things convenient for movable couple 9, and the clearance is very little can make couple 9 pin key ring 13, key ring 13 and key can not random get, storage bin 2's front is fixed with door 3 through the hinge, be equipped with the torsional spring that keeps door 3 to close in the hinge, then when stretching out couple 9, can be automatic push up and open door 3, and during withdrawal couple 9, door 3 can be automatic closing.
The key is hung on the hook 9 through the key ring 13, the key ring 13 placed in each storage bin 2 is provided with a balancing weight, the gravity sum of the key hung in each storage bin 2, the gravity sum of the key ring 13 and the balancing weight are different, and the difference value of the gravity sum is larger than a set value, so that the weight sum of the key in each storage bin 2 can be distinguished through weight, for example, the weight sum of the keys in the four storage bins 2 is respectively 50g, 100g, 150g and 200g, and the larger difference value cannot be distinguished and identified due to pollution weight increment and abrasion weight reduction, so that a brand new weight identification method is provided, and the key is prevented from being reliably identified and accurately stored.
Each hook 9 is provided with a supporting plate 11, a pressure sensor is arranged between the supporting plate 11 and the hook 9, and each pressure sensor is connected with the controller through a signal line, so that whether a key is stored or not is acquired through the pressure sensors, and whether the key is correctly stored or not is determined.
In addition, can also be equipped with the lock unit between every door 3 and storage bin 2, every lock unit is connected through the signal line to the controller, the lock unit uses intelligent driver chip SM001, it can drive 12V's electromagnetic lock work, and the automatic feedback function, can feed back the door switch state under this lock in real time, the lock unit is met with outside electromagnetic lock through 4 groups JP1/2/3/4 pins, drive lock work, and use RS485_ A and RS485_ B pin to link to each other with the PA2/PA3 pin of master control MCU module, thereby make the controller drive electromagnetic lock work and read the switch door information, in addition the lock unit uses the 5V voltage of power supply unit output to supply power, the lock unit can cooperate the couple 9 locking keys to realize double protection.
The box 1 is equipped with camera 10 and button 6 outward, and camera 10 and button 6 pass through signal line connection director, and camera 10 shoots the direction and is located the one side that box 1 set up door 3, and button 6 output starts bluetooth unit's signal to controller. The camera 10 unit adopts a Sony sentiment USB camera 10 module, carries a Sony photosensitive chip IMX317, and can realize wide-angle 100-degree distortion-free shooting.
A controller, a Bluetooth unit, a power supply unit, a storage unit and a communication unit are fixed in the control cabin 4, the controller is a master control device, for example, a 32-bit basic chip STM32F103RCT6 of TI company is used, the chip is based on a Cortex-M3 inner core, the main frequency is 72MHZ, and the on-chip and the off-chip resources are rich, so that the performance requirements of the patent on a master control module can be met; the controller is respectively connected with other electronic components through signal lines, is connected with each electric cylinder 12 through the signal lines, drives each electric cylinder 12 to work, is connected with the door lock unit through the signal lines, and controls each door lock unit to work.
The controller is connected with the Bluetooth unit through a signal wire and is communicated with the mobile phone of the user through the Bluetooth unit. The Bluetooth communication unit supplies power by using 3.3V voltage output by the power supply unit and is connected with pins PA10-RXD1 and PA9-TXD1 of the main control MCU module through a No. 29 RXD pin and a No. 30 RXD pin to perform data communication.
The storage unit is used for storing data information, the power supply unit uses a linear direct current/direct current switch module, 12V2A direct current voltage is input, 3.3V and 5V are output in various voltage formats, power is provided for each module in the device, the communication unit can be connected with a remote server in a wireless network communication mode, data and verification information are sent to the remote server, and remote verification and storage can be achieved.
The control method based on the intelligent key cabinet system comprises the following steps:
the two-dimensional code is a label attached to the box body 1, so that a user can conveniently scan the code, after the user scans the two-dimensional code on the box body 1 through a mobile phone, if a mobile phone end application program is not installed, the two-dimensional code is directly linked to the mobile phone end application program for installation, and if the two-dimensional code is installed, the mobile phone end application program is opened;
if two or more matched user mobile phones exist in the signal range of the Bluetooth unit, the local Bluetooth name of the mobile phone is transmitted to the Bluetooth unit through Bluetooth signals after the two-dimensional code is scanned, and the Bluetooth unit disconnects other Bluetooth users in the signal range and only connects the mobile phone user with the local Bluetooth name.
the set task is a task specified in the application program of the mobile phone end, such as reading a clause, executing some operations and the like, after the operation is finished, a two-dimensional code can be obtained through software, and the corresponding storage bin 2 can be opened through the two-dimensional code;
the system can know which storage bin 2 needs to be opened after scanning the outer two-dimensional code, the intelligent key cabinet system packages and sends verification information to the server to wait for obtaining information passing verification, such as video shooting information or missing two-dimensional code information and the like, and the verification is completed in a remote server computer or manual mode, if the verification is successful, the information is fed back to the system, and the step 4 is executed after the server feeds back the information passing verification, otherwise, the waiting state is maintained; under the condition that the feedback is waiting or fails, the prompt can be performed through the application program of the mobile phone end, so that the box body 1 does not need to be additionally provided with a prompt device such as a screen or a loudspeaker and the like, and the cost of the device is reduced;
and 6, judging whether the information of the current storage bin 2 is the last defined operation, wherein the information of the storage bin 2 acquired in the step 3 comprises a key used in the last step, if so, closing the intelligent key cabinet system, and if not, returning to the step 2.
In order to facilitate the first connection of the Bluetooth equipment, after the user mobile phone presses the key 6 when connecting the Bluetooth unit for the first time, the Bluetooth unit works to send out a Bluetooth signal for matching the user mobile phone and maintain the set time; the user operates the mobile phone to search the signal of the Bluetooth unit and then clicks, and the connection is completed after the verification password is input; the Bluetooth unit records the Bluetooth name of the matched user mobile phone.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (10)
1. The utility model provides an intelligence key cabinet system based on bluetooth communication which characterized in that: the box is equipped with a control storehouse and at least one storage compartment that is used for depositing the key, every be equipped with a couple in the storage compartment, the key passes through the key ring and hangs on the couple, the couple passes through the connecting rod and connects on the electronic jar of the interior back of storage compartment, electronic jar promotes the couple and stretches out or withdrawal storage compartment, the control storehouse internal fixation has controller and bluetooth unit, every electronic jar is connected to controller passing signal line, bluetooth unit is connected to controller passing signal line to through bluetooth unit and user mobile phone communication.
2. The smart key cabinet system based on bluetooth communication of claim 1, wherein: the remote control device is characterized in that a power supply unit, a storage unit and a communication unit are arranged in the control bin, the controller is connected with the storage unit and the communication unit through signal lines respectively, the controller stores acquired information in the storage unit, the controller is communicated with a remote server through the communication unit, the input end of the power supply unit is connected with a mains supply through a power line, and the output end of the power supply unit is connected with a power supply interface of the controller through the power line.
3. A smart key locker system based on bluetooth communication according to claim 1 or 2 characterised in that: every be equipped with a backup pad on the couple, be equipped with pressure sensor between backup pad and the couple, every pressure sensor passes through signal line connection director, is equipped with a balancing weight on the key ring of placing in every storage compartment, every the weight sum of the key of hanging in the storage compartment, key ring and balancing weight is all inequality, and the difference of gravity sum each other all is greater than the setting value.
4. The smart key cabinet system based on bluetooth communication of claim 3, wherein: the clearance between the upper edge of the hook and the top of the inner wall of the storage bin is smaller than the outer diameter of the steel wire for manufacturing the key ring, a bin door is fixed on the front surface of the storage bin through a hinge, and a torsion spring for keeping the bin door closed is arranged in the hinge.
5. The smart key cabinet system based on bluetooth communication of claim 4, wherein: and a door lock unit is arranged between each bin door and the storage bin, and the controller is connected with each door lock unit through a signal line.
6. A smart key locker system based on Bluetooth communication as claimed in claim 1 or claim 5, wherein: the box is equipped with camera and button outward, camera and button pass through signal line connection controller, the camera direction of shooing is located the one side that the box set up the door, button output starts bluetooth unit's signal to controller.
7. A control method based on the intelligent key cabinet system of claims 1-6, characterized in that:
step 1, scanning the two-dimensional code, opening a mobile phone end application program, sending a signal to a Bluetooth unit by a mobile phone through a Bluetooth signal, and starting an intelligent key cabinet system;
step 2, operating the mobile phone end application program to complete a set task and then acquiring the two-dimensional code, and scanning the two-dimensional code by using a camera;
step 3, obtaining storage bin information after the two-dimensional code is verified;
step 4, starting the verified electric cylinder of the storage bin to push out the hook;
step 5, defining that the key is taken away when the pressure signal of the pressure sensor disappears and the disappearance time exceeds the set time, and defining that the key is put back when the pressure sensor obtains the pressure signal again and the pressure value is within the set threshold interval and the pressure value is maintained to exceed the set time after the key is taken away;
step 5, immediately starting the electric cylinder to retract the hook into the storage bin after the key is put back;
and 6, judging whether the current storage bin information is the last defined operation, if so, closing the intelligent key cabinet system, and if not, returning to the step 2.
8. The control method according to claim 7, characterized in that: in the step 3, the intelligent key cabinet system packs the verification information and sends the verification information to the server to wait for obtaining the information passing the verification, and then the step 4 is executed until the server feeds back the information passing the verification, otherwise, the waiting state is maintained;
and 4, opening the door lock unit before the electric cylinder works, and locking the door lock unit of the storage bin after the electric cylinder works in the step 5.
9. The control method according to claim 5 or 6, characterized in that: the method for connecting the Bluetooth unit by the mobile phone of the user for the first time comprises the following steps:
after the key is pressed down, the Bluetooth unit works to send out a Bluetooth signal used for matching with the mobile phone of the user and maintain the set time;
the user operates the mobile phone to search the signal of the Bluetooth unit and then clicks, and the connection is completed after the verification password is input;
the Bluetooth unit records the Bluetooth name of the matched user mobile phone.
10. The control method according to claim 9, characterized in that: after a user scans the two-dimensional code on the box body through a mobile phone, if the mobile phone application program is not installed, the user is directly linked to the mobile phone application program for installation, and if the mobile phone application program is installed, the mobile phone application program is opened;
if two or more matched user mobile phones exist in the signal range of the Bluetooth unit, the local Bluetooth name of the mobile phone is transmitted to the Bluetooth unit through Bluetooth signals after the two-dimensional code is scanned, and the Bluetooth unit disconnects other Bluetooth users in the signal range and only connects the mobile phone user with the local Bluetooth name.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010802341.6A CN112196376A (en) | 2020-08-11 | 2020-08-11 | Intelligent key cabinet system based on Bluetooth communication and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010802341.6A CN112196376A (en) | 2020-08-11 | 2020-08-11 | Intelligent key cabinet system based on Bluetooth communication and control method thereof |
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| CN112196376A true CN112196376A (en) | 2021-01-08 |
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| CN202010802341.6A Pending CN112196376A (en) | 2020-08-11 | 2020-08-11 | Intelligent key cabinet system based on Bluetooth communication and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023005527A1 (en) * | 2021-07-26 | 2023-02-02 | 长城汽车股份有限公司 | Method and apparatus for controlling key ejection, electronic device, and storage medium |
-
2020
- 2020-08-11 CN CN202010802341.6A patent/CN112196376A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023005527A1 (en) * | 2021-07-26 | 2023-02-02 | 长城汽车股份有限公司 | Method and apparatus for controlling key ejection, electronic device, and storage medium |
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