A smart key cabinet system based on Bluetooth communication and its control method

Abstract

The application discloses a smart key cabinet system based on Bluetooth communication, the box is provided with a control bin and at least one storage bin for storing keys, a hook is arranged in each storage bin, the key is hung on the hook through a key ring, the hook is connected to an electric cylinder on the back of the storage bin through a connecting rod, the electric cylinder pushes the hook to extend or retract into the storage bin, a controller and a Bluetooth unit are fixed in the control bin, the controller is connected to each electric cylinder through a signal line, the controller is connected to the Bluetooth unit through a signal line and communicates with a user's mobile phone through the Bluetooth unit. The application has the functions of sensing and judging the key, and the function of having a reply when temporarily taking away and putting back the key, the system is started and stopped conveniently through Bluetooth connection, the whole process is controlled, and the order and process of operation work can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power operation and inspection, in particular to smart key cabinet equipment based on Bluetooth communication. Background Art

[0002] To ensure the safety of substation power operations and maintenance, power companies require centralized key management for all substations. Currently, most substations use key machines for on-site key management. Existing key machines require on-site personnel to press buttons on the machine and send a request text message to a designated manager. The manager then authorizes the key machine to open and retrieve the key. This approach increases the workload for maintenance personnel and reduces efficiency. Furthermore, it is independent of the operation ticket system, making it difficult to manage centrally. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to realize a substation power operation and maintenance key management device, which can realize authorization in the operation ticket system, so that the operation and maintenance personnel can verify the authority and open the key cabinet to obtain the required key through the operation ticket mobile terminal, thereby strengthening the security management of the substation on-site keys, and at the same time can also reduce the workload of on-site operation and maintenance personnel and improve operation and maintenance efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a smart key cabinet system based on Bluetooth communication, the box body is provided with a control compartment and at least one storage compartment for storing keys, each storage compartment is provided with a hook, the key is hung on the hook through a key ring, the hook is connected to the electric cylinder on the back of the storage compartment through a connecting rod, the electric cylinder pushes the hook to extend or retract the storage compartment, a controller and a Bluetooth unit are fixed in the control compartment, the controller is connected to each electric cylinder through a signal line, the controller is connected to the Bluetooth unit through a signal line, and communicates with the user's mobile phone through the Bluetooth unit.

[0005] The control compartment is equipped with a power supply unit, a storage unit, and a communication unit. The controller is connected to the storage unit and the communication unit respectively through signal lines. The controller stores the acquired information in the storage unit. The controller communicates with the remote server through the communication unit. The input end of the power supply unit is connected to the mains through a power line, and the output end is connected to the power interface of the controller through a power line.

[0006] Each of the hooks is provided with a support plate, and a pressure sensor is provided between the support plate and the hook. Each of the pressure sensors is connected to the controller via a signal line. A counterweight is provided on the key ring placed in each storage bin. The sum of the gravity of the keys, key rings and counterweights hung in each storage bin is different, and the difference in the sum of their gravity is greater than the set value.

[0007] The gap 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 used to make the key ring. A bin door is fixed to the front of the storage bin via a hinge, and a torsion spring is provided in the hinge to keep the bin door closed.

[0008] A door lock unit is provided between each of the warehouse doors and the storage warehouse, and the controller is connected to each door lock unit via a signal line.

[0009] A camera and a button are provided outside the box, and the camera and the button are connected to the controller through a signal line. The shooting direction of the camera is located on the side of the box where the door is set, and the button outputs a signal to start the Bluetooth unit to the controller.

[0010] A control method based on the smart key cabinet system:

[0011] Step 1. Scan the QR code and open the mobile app. The phone sends a signal to the Bluetooth unit via Bluetooth, and the smart key cabinet system starts.

[0012] Step 2: Complete the task on your mobile app and obtain the QR code. Scan the QR code with your camera.

[0013] Step 3: After verifying the QR code, obtain the storage warehouse information;

[0014] Step 4: Start the verified storage bin electric cylinder to push out the hook;

[0015] Step 5: If the pressure signal from the pressure sensor disappears and the disappearance time exceeds the set time, it is defined as the key has been taken away. If the pressure sensor receives a pressure signal again after the key has been taken away and the pressure value is within the set threshold range and remains within the set time, it is defined as the key has been returned.

[0016] Step 5: After the key is put back, immediately start the electric cylinder to retract the hook into the storage compartment;

[0017] Step 6: Determine whether the current storage bin information is the last defined operation. If yes, the smart key cabinet system is shut down. If no, return to step 2.

[0018] In step 3, the smart key cabinet system packages the verification information and sends it to the server to wait for the verification information to be obtained. Step 4 will be executed after the server feedbacks the verification success information, otherwise the waiting state will be maintained;

[0019] In the step 4, the door lock unit is opened before the electric cylinder works, and in the step 5, the door lock unit is closed after the electric cylinder works.

[0020] How to connect a user's mobile phone to a Bluetooth unit for the first time:

[0021] After pressing the button, the Bluetooth unit works, sends out a Bluetooth signal for matching the user's mobile phone, and maintains the set time;

[0022] The user searches for the Bluetooth unit's signal with the mobile phone and clicks it, then enters the verification password to complete the connection;

[0023] The Bluetooth unit records the Bluetooth name of the paired user's mobile phone.

[0024] After the user scans the QR code on the box with a mobile phone, if the mobile app is not installed, it will be directly linked to the mobile app installation; if it is already installed, it will open the mobile app;

[0025] If there are two or more paired user phones within the signal range of the Bluetooth unit, after scanning the QR code, the local Bluetooth name of the mobile phone is transmitted to the Bluetooth unit via the Bluetooth signal. The Bluetooth unit disconnects other Bluetooth users within the signal range and only connects to the mobile phone user with the local Bluetooth name.

[0026] The present invention has the function of sensing and judging the key inside, and has the function of obtaining a receipt when taking it away temporarily or putting it back. The system can be started and shut down conveniently through Bluetooth connection, and the whole process is controlled to ensure the order and process of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following is a brief description of the contents and symbols of each figure in the specification of the present invention:

[0028] Figure 1 This is a schematic diagram of the structure of the smart key cabinet system;

[0029] Figure 2 This is the schematic diagram of the smart key cabinet system;

[0030] Figure 3 It is a side sectional view of a single storage bin;

[0031] The marks in the above figure are: 1. Box body; 2. Storage compartment; 3. Compartment door; 4. Control compartment; 5. QR code label; 6. Button; 7. Upper handle; 8. Gasket; 9. Hook; 10. Camera; 11. Support plate; 12. Electric cylinder; 13. Key ring. DETAILED DESCRIPTION

[0032] Below, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation methods of the present invention, such as the shape, structure, relative positions and connection relationships of the various components involved, the functions and working principles of the various components, the manufacturing process and operating methods, etc., are further explained in detail to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0033] The smart key cabinet system is provided with a box body 1, which is generally a rectangular or cubic box. Rubber gaskets 8 can be fixed on the sides and bottom of the box body 1 to protect the box body 1. An upper handle 7 can be provided on the top of the box body 1 to facilitate taking and placing the box body 1.

[0034] The box body 1 is provided with a control compartment 4 and at least one storage compartment 2 for storing keys. The number of storage compartments 2 is designed according to needs, such as Figure 1 As shown, there are four storage compartments 2, and the structure of each storage compartment 2 is the same, and the same top is a control compartment 4, which is used to fix electronic components.

[0035] Each storage bin 2 is provided with a hook 9, and both ends of the hook 9 are of the same height, and both ends are almost attached to the top of the inner wall of the storage bin 2. The gap between the upper edge of the hook 9 and the top of the inner wall of the storage bin 2 is smaller than the outer diameter of the steel wire making the key ring 13. The gap is used to facilitate the movement of the hook 9, and the gap is very small so that the hook 9 can lock the key ring 13, and the key ring 13 and the key cannot be taken out at will. The front of the storage bin 2 is fixed with a bin door 3 by a hinge, and a torsion spring is provided in the hinge to keep the bin door 3 closed. When the hook 9 is extended, the bin door 3 can be automatically pushed open, and when the hook 9 is retracted, the bin door 3 can be automatically closed.

[0036] The hook 9 is connected to the electric cylinder 12 on the back of the storage bin 2 through a connecting rod. A cavity can be provided on the back of the box 1 to place the electric cylinder 12 of each storage bin 2. The arrangement structure of the electric cylinder 12 is as follows: Figure 3 As shown, the electric cylinder 12 pushes the hook 9 to extend or retract into the storage compartment 2. When the hook 9 extends from the storage compartment 2, the key can be removed or replaced. After the hook 9 is retracted, the two ends of the hook 9 are attached to the top to prevent the key from being removed. In order to facilitate the control of the range of movement of the electric cylinder 12, a travel switch can be fixed to the connecting rod, and two protrusions are set on the side of each storage compartment 2. When the hook 9 extends to the farthest end of the travel, the travel switch contacts one protrusion. When the hook 9 retracts to the farthest end of the travel, the travel switch contacts the other protrusion, thereby obtaining the travel range of the electric cylinder 12. Each travel switch is connected to the controller via a signal line.

[0037] The keys are hung on the hook 9 via a key ring 13. A counterweight is provided on the key ring 13 placed in each storage compartment 2. The sum of the gravity of the keys, key ring 13 and counterweight hung in each storage compartment 2 is different, and the difference in the sum of their gravity is greater than a set value. In this way, the total weight of the keys in each storage compartment 2 can be distinguished by weight. For example, the total weight of the keys in the four storage compartments 2 is 50g, 100g, 150g and 200g respectively. Such a large difference will not be indistinguishable due to weight gain due to contamination or weight loss due to wear and tear, thereby providing a new weight recognition method to ensure reliable identification and accurate storage of keys.

[0038] A support plate 11 is provided on each hook 9, and a pressure sensor is provided between the support plate 11 and the hook 9. Each pressure sensor is connected to the controller via a signal line, so that the pressure sensor can be used to determine whether a key is stored and whether the key is stored correctly.

[0039] In addition, a door lock unit can be provided between each warehouse door 3 and the storage warehouse 2. The controller is connected to each door lock unit through a signal line. The door lock unit uses the intelligent driver chip SM001, which can drive the 12V electromagnetic lock to work and has an automatic feedback function. It can provide real-time feedback on the door switch status under the lock. The door lock unit is connected to the external electromagnetic lock through 4 groups of JP1 / 2 / 3 / 4 pins to drive the door lock to work, and uses the RS485_A and RS485_B pins to connect to the PA2 / PA3 pins of the main control MCU module, so that the controller drives the electromagnetic lock to work and reads the door opening and closing information. In addition, the door lock unit is powered by the 5V voltage output by the power supply unit. The door lock unit can cooperate with the hook 9 to lock the key to achieve double protection.

[0040] A camera 10 and a button 6 are mounted on the exterior of the enclosure 1. These buttons are connected to a controller via a signal cable. Camera 10 is positioned on the side of the enclosure 1 where door 3 is located. Button 6 transmits a signal to the controller to activate the Bluetooth unit. Camera 10 utilizes a Sony Emotion USB camera module equipped with the Sony IMX317 sensor, enabling 100-degree wide-angle, distortion-free shooting.

[0041] The control compartment 4 is fixed with a controller, a Bluetooth unit, a power supply unit, a storage unit, and a communication unit. The controller is a master control device, for example, TI's 32-bit basic chip STM32F103RCT6 is used. The chip is based on the Cortex-M3 core, has a main frequency of 72MHZ, and has rich on-chip peripheral resources, which can meet the performance requirements of the main control module of this patent; the controller is connected to other electronic components through signal lines, and the controller is connected to each electric cylinder 12 through a signal line to drive each electric cylinder 12 to work, and the control is connected to the door lock unit through a signal line to control the operation of each door lock unit.

[0042] The controller is connected to the Bluetooth unit via a signal cable and communicates with the user's mobile phone through the Bluetooth unit. Bluetooth signals facilitate user identification and ensure the reliability of the operator's identity. The Bluetooth communication unit is powered by the 3.3V voltage output by the power supply unit and is connected to the main control MCU module's PA10-RXD1 and PA9-TXD1 pins via RXD pins 29 and 30 for data communication.

[0043] The storage unit is used to store data information. The power supply unit uses a linear DC / DC switching module, which inputs 12V2A DC voltage and outputs multiple voltage formats including 3.3V and 5V to provide power for each module in the device. The communication unit can use wireless network communication to connect to the remote server and send data and verification information to the remote server, which can realize remote verification and storage.

[0044] Control method based on the above-mentioned smart key cabinet system:

[0045] Step 1. Scan the QR code and open the mobile app. The phone sends a signal to the Bluetooth unit via Bluetooth, and the smart key cabinet system starts.

[0046] The QR code is a label attached to the box 1 for the convenience of users to scan. After the user scans the QR code on the box 1 with a mobile phone, if the mobile application is not installed, it will be directly linked to the mobile application installation. If it is already installed, the mobile application will be opened;

[0047] If there are two or more paired user phones within the signal range of the Bluetooth unit, after scanning the QR code, the local Bluetooth name of the mobile phone is transmitted to the Bluetooth unit via the Bluetooth signal. The Bluetooth unit disconnects other Bluetooth users within the signal range and only connects to the mobile phone user with the local Bluetooth name.

[0048] Step 2: After completing the task, use the mobile phone application to obtain the QR code and scan the QR code with the camera 10;

[0049] The set task is a task specified in the mobile application, such as reading the terms and conditions, performing certain operations, etc. After completing the operation, a QR code can be obtained through the software, and the QR code can be used to open the corresponding storage bin 2;

[0050] Step 3: After verifying the QR code, obtain the storage warehouse 2 information;

[0051] After the system scans the external QR code, it will know which storage compartment 2 needs to be opened. The smart key cabinet system will package the verification information and send it to the server to wait for the verification information, such as the video shooting information, or the missing QR code information, etc. to be uploaded. The verification is completed by a remote server computer or manually. If the verification is successful, the system will be fed back with information. When the server feeds back the verification success information, step 4 will be executed, otherwise the waiting state will be maintained. When the feedback is waiting or the feedback is not passed, a prompt can be given through the mobile phone application. In this way, the box 1 does not need to be equipped with additional prompt devices such as a screen or speaker, reducing equipment costs.

[0052] Step 4: After successful verification, the system will operate the corresponding storage bin 2, start the verified storage bin 2 to open the door lock unit, and then the electric cylinder 12 will push out the hook 9;

[0053] Step 5: If the pressure signal from the pressure sensor disappears and the disappearance time exceeds the set time, it is defined as the key has been taken away. If the pressure sensor receives a pressure signal again after the key has been taken away and the pressure value is within the set threshold range and remains within the set time, it is defined as the key has been put back. This extended design can avoid misoperation.

[0054] Step 5: After the key is put back, the electric cylinder 12 is immediately activated to retract the hook 9 into the storage compartment 2, and then the door lock unit is closed (locked);

[0055] Step 6: Determine whether the current storage bin 2 information is the last defined operation. The storage bin 2 information obtained in step 3 includes whether it is the key used in the last step. If so, the smart key cabinet system is shut down. Otherwise, return to step 2.

[0056] To facilitate the first connection to a Bluetooth device, when the user's mobile phone is connected to the Bluetooth unit for the first time, press button 6, the Bluetooth unit will work, send out a Bluetooth signal for matching the user's mobile phone, and maintain it for a set time; the user uses the mobile phone to search for the signal of the Bluetooth unit and clicks it, and the connection is completed after entering the verification password; the Bluetooth unit records the Bluetooth name of the matched user's mobile phone.

[0057] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A smart key cabinet system based on Bluetooth communication, characterized by: The box body is provided with a control compartment and at least one storage compartment for storing keys. Each storage compartment is provided with a hook, and the key is hung on the hook through a key ring. The hook is connected to the electric cylinder on the back of the storage compartment through a connecting rod. The electric cylinder pushes the hook to extend or retract the storage compartment. A controller and a Bluetooth unit are fixed in the control compartment. The controller is connected to each electric cylinder through a signal line. The controller is connected to the Bluetooth unit through a signal line and communicates with the user's mobile phone through the Bluetooth unit. The gap between the upper edge of the hook and the top of the inner wall of the storage compartment is smaller than the outer diameter of the steel wire used to make the key ring; The control compartment is provided with a power supply unit, a storage unit, and a communication unit. The controller is connected to the storage unit and the communication unit respectively through signal lines. The controller stores the acquired information in the storage unit. The controller communicates with the remote server through the communication unit. The input end of the power supply unit is connected to the mains through a power line, and the output end is connected to the power interface of the controller through a power line. Each of the hooks is provided with a support plate, a pressure sensor is provided between the support plate and the hook, each of the pressure sensors is connected to a controller via a signal line, a counterweight is provided on a key ring placed in each storage bin, and the sum of the gravity of the keys, key rings, and counterweights hung in each storage bin is different, and the difference between the sums of the gravity between them is greater than a set value; The box is a rectangular or cubic box, and rubber gaskets can be fixed on the sides and bottom of the box to protect the box. A handle can be provided on the top of the box to facilitate taking the box out. The two ends of the hook are at the same height, and both ends are almost close to the top of the inner wall of the storage bin; A travel switch is fixed on the connecting rod, and two protrusions are set on the side of each storage bin. When the hook extends to the farthest end of the stroke, the travel switch contacts one protrusion, and when the hook retracts to the farthest end of the stroke, the travel switch contacts the other protrusion, thereby obtaining the travel range of the electric cylinder.

2. The smart key cabinet system based on Bluetooth communication according to claim 1, characterized in that: A door is fixed to the front of the storage bin via a hinge, and a torsion spring for keeping the door closed is arranged in the hinge.

3. The smart key cabinet system based on Bluetooth communication according to claim 2, characterized in that: A door lock unit is provided between each of the warehouse doors and the storage warehouse, and the controller is connected to each door lock unit via a signal line.

4. The smart key cabinet system based on Bluetooth communication according to claim 1 or 3, characterized in that: A camera and a button are provided outside the box, and the camera and the button are connected to the controller through a signal line. The shooting direction of the camera is located on the side of the box where the door is set, and the button outputs a signal to start the Bluetooth unit to the controller.

5. A control method based on the smart key cabinet system according to any one of claims 1 to 4, characterized in that: Step 1. Scan the QR code and open the mobile app. The phone sends a signal to the Bluetooth unit via Bluetooth, and the smart key cabinet system starts. Step 2: Complete the task on your mobile app and obtain the QR code. Scan the QR code with your camera. Step 3: After verifying the QR code, obtain the storage warehouse information; Step 4: Start the verified storage bin electric cylinder to push out the hook; Step 5: If the pressure signal from the pressure sensor disappears and the disappearance time exceeds the set time, it is defined as the key has been taken away. If the pressure sensor receives a pressure signal again after the key has been taken away and the pressure value is within the set threshold range and remains within the set time, it is defined as the key has been returned. Step 5: After the key is put back, immediately start the electric cylinder to retract the hook into the storage compartment; Step 6: Determine whether the current storage bin information is the last defined operation. If yes, the smart key cabinet system is shut down. If no, return to step 2.

6. The control method according to claim 5, characterized in that: In step 3, the smart key cabinet system packages the verification information and sends it to the server to wait for the verification information to be obtained. Step 4 will be executed after the server feedbacks the verification success information, otherwise the waiting state will be maintained; In the step 4, the door lock unit is opened before the electric cylinder works, and in the step 5, the door lock unit of the storage bin is locked after the electric cylinder works.

7. The control method according to claim 6, characterized in that: How to connect a user's mobile phone to a Bluetooth unit for the first time: After pressing the button, the Bluetooth unit works, sends out a Bluetooth signal for matching the user's mobile phone, and maintains the set time; The user searches for the Bluetooth unit's signal with the mobile phone and clicks it, then enters the verification password to complete the connection; The Bluetooth unit records the Bluetooth name of the paired user's mobile phone.

8. The control method according to claim 7, wherein: After the user scans the QR code on the box with a mobile phone, if the mobile app is not installed, it will be directly linked to the mobile app installation; if it is already installed, it will open the mobile app; If there are two or more paired user phones within the signal range of the Bluetooth unit, after scanning the QR code, the local Bluetooth name of the mobile phone is transmitted to the Bluetooth unit via the Bluetooth signal. The Bluetooth unit disconnects other Bluetooth users within the signal range and only connects to the mobile phone user with the local Bluetooth name.

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