CN211786700U - Key management and control system based on CAN bus - Google Patents

Abstract

The utility model is suitable for a key management and control technical field provides a key management and control system based on CAN bus, key management and control system includes key management and control platform, a first quantity of mechanical key management module, a second quantity of intelligent key management subassembly pass through the CAN bus with key management and control platform connects to realized the concentrated management and control of mechanical key management module, intelligent key management subassembly, reduced the complexity of the management platform of mechanical key management module and intelligent key management subassembly, improved key management and control efficiency.

Description

Key management and control system based on CAN bus

Technical Field

The utility model belongs to the technical field of the key management and control, especially, relate to a key management and control system based on CAN (Controller area network) bus.

Background

Along with the comprehensive popularization and application of the key management and control system, the key management and control system provides powerful guarantee for guaranteeing the safety of production and life. According to specific needs of customers, for example, specific situations of implementing field operated devices, in an existing key management and control system, a passive RFID (Radio Frequency Identification) induction key and an anti-misoperation smart key are proposed, but since the two keys have different purposes and different usage methods, a user can only respectively manage and control the two keys in different forms according to the different purposes of the keys, however, with the development of technologies and market demands, the original scheme of separately managing and controlling the two keys cannot meet the requirements of customers on safety.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a key management and control system based on CAN bus aims at solving the problem that current key management and control system CAN't concentrate the management and control with the key of two kinds of different forms.

In one aspect, the utility model provides a key management and control system based on CAN bus, including key management and control platform, a first quantity mechanical key management module, a second quantity intelligent key management subassembly pass through the CAN bus with the key management and control platform is connected.

Preferably, the key management platform comprises: ARM (Advanced RISC Machine) core board, touch display screen and CAN controller, the CAN controller with touch display screen connects on ARM core board's appointed port.

Further preferably, the key management and control platform further includes an external data interface, the external data interface includes a USB (Universal Serial Bus) interface, an RJ45(Registered Jack 45, public telecommunication network) interface, a Serial interface, and a CAN interface, and the external data interface is connected to a designated port of the ARM core board.

Further preferably, the key management and control platform further includes a wireless signal transceiver, where the wireless signal transceiver includes any one or more of a 4G (4th generation mobile network) wireless signal transceiver, a WiFi wireless signal transceiver, a Long Range Radio (Long Range Radio) wireless signal transceiver, an NB-loT (narrow band of Internet of Things) wireless signal transceiver, or a 5G (5th generation mobile network) wireless signal transceiver, and the wireless signal transceiver is connected to the designated port of the core board.

Preferably, the mechanical key management module includes: the intelligent key lock control system comprises a first micro control unit, a CAN controller, a plurality of mechanical key lock control units and an RFID (radio frequency Identification) module, wherein the CAN controller, each mechanical key lock control unit and the RFID module are connected to a designated port of the first micro control unit.

Further preferably, each mechanical key lock control unit of the mechanical key management module at least comprises a mechanical key lock and a status indicator light for the mechanical key lock.

Preferably, the smart key management assembly includes: the intelligent key lock control system comprises a second micro control unit, a CAN controller, an intelligent key communication interface and an intelligent key lock control unit, wherein the CAN controller, the intelligent key communication interface and the intelligent key lock control unit are connected to a designated port of the second micro control unit.

Further preferably, the smart key communication interface of the smart key management assembly at least includes a smart key charging detection interface and a smart key hall detection interface.

Further preferably, the CAN controller includes a CAN transceiver and an optocoupler connected with one end of the CAN transceiver, and the other end of the CAN transceiver is connected with the CAN bus.

Further preferably, the mechanical key management module and the intelligent key management assembly further comprise an audible and visual alarm, and the audible and visual alarm is connected to a designated port of the corresponding micro control unit.

The utility model provides a key management and control system based on CAN bus, including key management and control platform, a first quantity of mechanical key management module, a second quantity of intelligent key management subassembly passes through the CAN bus and is connected with key management and control platform, thereby mechanical key management module has been realized, intelligent key management subassembly's concentrated management and control, the complexity of the management platform of mechanical key management module and intelligent key management subassembly has been reduced, key management and control efficiency has been improved.

Drawings

Fig. 1 is a schematic structural diagram of a key management and control system provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a key management and control platform in the key management and control system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a mechanical key management module in the key management and control system according to an embodiment of the present invention;

fig. 4 is a schematic view of a work flow of a mechanical key management module in the key management and control system according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an intelligent key management assembly in the key management and control system according to an embodiment of the present invention;

fig. 6 is a schematic view of a work flow of an intelligent key management assembly in the key management and control system provided by the embodiment of the present invention; and

fig. 7 is a schematic flowchart of the mechanical key management module and the intelligent key management module of the key management and control system accessing the key management and control platform according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

The embodiment of the utility model provides a key management and control system based on CAN bus is used for managing the use of mechanical key and intelligent key (for example, prevent mistake intelligent key). Referring to fig. 1, the key management and control system includes a key management and control platform 1, a first number of mechanical key management modules 2, and a second number of smart key management assemblies 3, where the first number of mechanical key management modules 2 and the second number of smart key management assemblies 3 are connected to the key management and control platform 1 through a CAN bus 4. The first number and the second number are determined by a scene in which the key management and control system is applied or an operated device in the application scene, and specifically, the first number and the second number may be set according to a device number of a heartbeat packet sent to the CAN bus 4 by the mechanical key management module 2 and the smart key management component 3, so as to flexibly set the numbers of the mechanical key management module and the smart key management component.

The key management and control platform 1 may be configured to unlock authorization of a key, check key authorization information, access management of a key management device, and the like, and specifically, key management system software may be installed on the key management and control platform 1, and a user may interact with the key management and control platform 1 through an interaction interface provided by the key management system software, for example, the user may perform device description on the key management device to be accessed through the interaction interface provided by the key management system software, so that the key management device to be accessed corresponds to an actual key management device, and may also send an unlocking and locking command to the key management device through the key management system software, so as to unlock a corresponding key, where the key management device may be a mechanical key management module or an intelligent key management component.

Referring to fig. 2, the key management and control platform 1 is provided with an ARM core board 11, a touch display screen 12 and a CAN controller 13, the touch display screen 12 and the CAN controller 13 are connected to a designated port of the ARM core board 11, the ARM core board 11 may adopt an existing ARM core board, and specific interfaces thereof are not described again. Wherein, touch display screen 12 is as the carrier that shows the interactive interface of key management system software, user's accessible touch display screen 12 interacts with key management and control platform 1, CAN controller 13 is used for communicating with the CAN bus 4 that is connected with it, concretely, CAN controller 13 includes CAN transceiver 131, and the opto-coupler 132 of being connected with CAN transceiver 131 one end, the CAN transceiver 131 other end is connected with CAN bus 4, wherein, CAN transceiver 131 is arranged in receiving data and sending the data of key management and control platform 1 to CAN bus 4 in following CAN bus 4, opto-coupler 132 is used for keeping apart the high voltage and filters out high frequency interference. Further, the key management and control platform 1 is further provided with a power supply device 14 for providing a stable low-voltage power supply (e.g. 3.3v, 4.2v, 5v) to the key management and control platform 1, and the power supply device 14 is connected to the ARM core board 11 and a designated power supply port in each component.

Preferably, the key management and control platform 1 is further provided with reserved external data interfaces 15, the external data interfaces 15 include a USB interface 151, an RJ45 interface 152, a serial interface 153 and a CAN interface 154, and each of the external data interfaces 15 is connected to a designated port of the ARM core board 11. Wherein, USB interface 151 is used for external USB device, for example, keyboard, mouse, convenience of customers operates key management and control platform 1 through external USB device, RJ45 interface 152 is used for key management and control platform 1 and external network to communicate, for example, key management and control platform 1 receives external network data (like unblock key task request, software version's upgrading data) through RJ45 interface 152, serial interface 153 CAN be used to external serial devices, CAN interface 154 is used for the direct external equipment that has the CAN interface. The reserved external data interface 15 enables good scalability of the system.

Preferably, the key management and control platform 1 is further provided with a wireless signal transceiver 16, the wireless signal transceiver 16 may include any one or more of a 4G wireless signal transceiver, a WiFi wireless signal transceiver, a LoRa wireless signal transceiver, an NB-loT wireless signal transceiver, or a 5G wireless signal transceiver, and the wireless signal transceiver 16 is connected to a designated port of the ARM core board 11. The wireless signal transceiver 16 may be used to connect with a wireless terminal having a wireless signal transceiver, through which a user may interact with the key management and control platform 1, wherein the wireless terminal having a wireless signal transceiver may be a smart phone, a tablet computer, an intelligent wearable device, or the like.

The mechanical key management module 2 is used for managing the passive RFID induction key, and the CAN bus 4 distinguishes the identity ID of each mechanical key management module 2 according to the equipment number of the heartbeat packet sent by the mechanical key management module 2. Referring to fig. 3, the mechanical key management module 2 is provided with a first micro control unit 21, a plurality of mechanical key lock control units 22, a CAN controller 23, and an RFID module 24, wherein each of the mechanical key lock control units 22, the CAN controller 23, and the RFID module 24 is connected to a designated port of the first micro control unit 21. The mechanical key lock control units 22 are used for managing and controlling mechanical keys, the number of the mechanical key lock control units 22 is set according to the number of the ports provided by the first micro control unit 21, each mechanical key lock control unit 22 is at least provided with one mechanical key lock 221 and one mechanical key lock state prompt lamp 222, and each mechanical key lock 221 is used for unlocking at least one mechanical key with a passive RFID, so that the mechanical keys are controlled to be taken and used. As an example, when the mechanical key lock unit 22 receives an unlocking instruction, the mechanical key lock 221 is unlocked, and the mechanical key lock status indicator lamp 222 may display a green color indicating that the corresponding mechanical key is unlocked and available for the user. If the mechanical key lock 221 is in a locked state, indicating that the corresponding mechanical key with the passive RFID is in a locked state, the mechanical key lock state indicator 222 may display a red color. The components and connection mode inside the CAN controller 23 are the same as those of the CAN controller 13, and are not described herein again, the RFID module 24 is configured to read an RFID code value of the mechanical key to determine whether the mechanical key with the passive RFID that is taken out is the same as the mechanical key returned by the user, and further determine whether the returned mechanical key is misplaced, the mechanical key management module 2 is further provided with a power supply device 25, and the structure and function of the power supply device 25 are the same as those of the power supply device 14, and are not described herein again.

Further, the mechanical key management module 2 is further provided with a timer 26, a crystal oscillator 27 and a memory 28, the timer 26, the crystal oscillator 27 and the memory 28 are connected to a designated port of the first micro-control unit 21, wherein the timer 26 is used for sending heartbeat packets at regular time, the crystal oscillator 27 is used for providing an operating frequency to the first micro-control unit 21, and the memory 28 is used for storing data generated when the mechanical key management module 2 operates.

Preferably, the mechanical key management module 2 is further provided with an audible and visual alarm 29, and the audible and visual alarm 29 is connected to a designated port of the first micro control unit for reminding a user not to misplace the mechanical key.

For convenience of understanding, please refer to fig. 4, an embodiment of the present invention provides a workflow of the mechanical key management module 2 in the key management and control system, including the following steps:

s41, the mechanical key management module 2 receives a mechanical key unlocking instruction, and the mechanical key unlocking instruction CAN be input through the key management and control platform 1 and issued through the CAN bus 4;

s42, the first micro control unit 21 of the mechanical key management module 2 parses the received mechanical key unlocking instruction, sends a control command to the mechanical key lock control unit 22 according to the parsing result, and sends a confirmation message that the mechanical key unlocking instruction has been received to the key management and control platform 1 through the CAN bus 4, and the mechanical key lock control unit 22 unlocks the corresponding mechanical key (for example, a mechanical key with a passive RFID) according to the control command sent by the first micro control unit 21;

s43, when it is detected that the user takes the mechanical key, setting the state of the mechanical key lock state indicator 222 corresponding to the unlocked mechanical key lock control unit 22, for example, setting the state of the mechanical key lock state indicator 222 to display green (unlocked), and sending an unlocking success message to the key management and control platform 1 through the CAN bus 4;

s44, the RFID module 24 of the mechanical key management module 2 detects whether the mechanical key with the passive RFID is placed in the mechanical key lock unit 22 (accommodating space) by reading the RFID code value of the mechanical key;

s45, when the RFID is read, judging whether the code value of the RFID is the same as the code value of the RFID corresponding to the mechanical key lock control unit 22;

and S46, when the code value of the RFID is the same as the RFID code value corresponding to the mechanical key lock control unit 22, the mechanical key management module 2 sends a message that the mechanical key is returned to the key management and control platform 1 through the CAN bus 4, and sets the state of the mechanical key lock state indicator lamp 222 of the corresponding mechanical key lock control unit 22.

The key management module 3 is configured to manage a key, and referring to fig. 5, the key management module 3 is provided with a second micro control unit 31, a key communication interface 32, a CAN controller 33, and a key lock control unit 34, where the key communication interface 32, the CAN controller 33, and the key lock control unit 34 are connected to a designated port of the second micro control unit 31. The smart key communication interface 32 is configured to communicate with a smart key, for example, read smart key operation data and send a smart key operation flow, further, the smart key communication interface 32 is further provided with a smart key charging detection interface 321 and a smart key hall detection interface 322, the smart key charging detection interface 321 is configured to detect a charging status of the smart key, the smart key hall detection interface 322 is configured to detect a use state of the smart key, the structure and the connection manner of the CAN controller 33 are the same as those of the CAN controller 13, which is not described herein again, the smart key lock control unit 34 is configured to unlock the smart key, the smart key management assembly 3 is further provided with a power supply device 35, the structure and the function of the power supply device 35 are the same as those of the power supply device 14, which is not described herein again.

Further, the smart key management component 3 is further provided with a timer 36, a crystal oscillator 37 and a memory 38, wherein the timer 36, the crystal oscillator 37 and the memory 38 are connected to a designated port of the second mcu 31, and functions of the timer 36, the crystal oscillator 37 and the memory 38 are the same as those of the timer 26, the crystal oscillator 27 and the memory 28, and are not described herein again.

Preferably, the smart key management assembly 3 is further provided with an audible and visual alarm 39, the audible and visual alarm 39 is connected to a designated port of the second micro control unit 31, and the audible and visual alarm 39 is used for prompting whether the smart key is placed incorrectly. Illustratively, when the smart key identification information acquired through the smart key communication interface 32 does not match the pre-stored smart key identification information, indicating that the smart key is placed at a wrong position, the audible and visual alarm 39 sounds an alarm to prompt the user to reposition.

For easy understanding, please refer to fig. 6, an embodiment of the present invention provides a workflow of the smart key management component 3 in the key management and control system, including the following steps:

s61, the intelligent key management component 3 receives an intelligent key unlocking instruction, and the intelligent key unlocking instruction CAN be input through the key management and control platform 1 and issued through the CAN bus 4;

s62, the second micro control unit 31 of the intelligent key management assembly 3 analyzes the received intelligent key unlocking instruction, sends a control instruction to the intelligent key lock control unit 34 according to the analysis result, sends a confirmation message of receiving the intelligent key unlocking instruction to the key management and control platform 1 through the CAN bus 4, and the intelligent key lock control unit 34 unlocks the corresponding intelligent key according to the control instruction sent by the second micro control unit 31;

and S63, when the fact that the user takes the smart key away is detected, the second micro control unit 31 sends a message that the unlocking of the smart key is successful to the key management and control platform 1 through the CAN bus 4.

Further, if the key management and control platform issues the key operation flow, the issuing operation flow message ID is sent through the CAN bus, the content includes the unlocking message ID of the smart key management component and the corresponding smart key number, after the smart key management component receives the message, the smart key management component replies to the key management and control platform device confirmation message, and at this time, the operation flow issuing CAN be performed on the smart key.

The embodiment of the utility model provides a still provide a key management device and inserted key management and control system's method, wherein, key management device is mechanical key management device 2 or intelligent key management subassembly 3. For ease of understanding, with reference to fig. 7, the method includes the steps of:

s71, the key management and control platform 1 receives a heartbeat packet of the key management device through the CAN bus 4, the heartbeat packet comprises a heartbeat command and a device number, the heartbeat command is used for distinguishing the priority of the command sent by the CAN bus 4 to the key management device, the device number is used for identifying the ID of different key management devices, before the key management and control platform 1 receives the heartbeat packet of the key management device through the CAN bus 4, the CAN bus 4 analyzes the heartbeat packet of the key management device, judges whether the same device number exists in the current system or not according to the analysis result, shields the heartbeat packet if the same device number exists in the current system, and allows the key management and control platform 1 to receive the heartbeat packet if the same device number does not exist in the current system;

s72, when the key management and control platform 1 receives the heartbeat package of the key management device, analyzing the heartbeat package of the key management device, acquiring the equipment type and the serial number of the key management device according to the analysis result, and receiving the description information of the key management device input by a user;

and S73, when the key management and control platform 1 receives the description information of the key management device input by the user, associating the type and the number of the actual key management device according to the description information of the key management device input by the user, and then managing and controlling the accessed key management device through the key management and control platform 1.

The embodiment of the utility model provides a key management and control system based on CAN bus, including key management and control platform, a first quantity mechanical key management module, a second quantity intelligent key management subassembly passes through the CAN bus and is connected with key management and control platform, thereby mechanical key management module has been realized, intelligent key management subassembly's concentrated management and control, the complexity of the management platform of mechanical key management module and intelligent key management subassembly has been reduced, key management and control efficiency has been improved.

The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.

Claims (10)

1. The key management and control system based on the CAN bus is characterized by comprising a key management and control platform, a first number of mechanical key management modules and a second number of intelligent key management assemblies, wherein the first number of mechanical key management modules and the second number of intelligent key management assemblies are connected with the key management and control platform through the CAN bus.

2. The key management system of claim 1, wherein the key management platform comprises: ARM nuclear core plate, touch display screen and CAN controller, the CAN controller and touch display screen connects on ARM nuclear core plate's the appointed port.

3. The key management and control system of claim 2, wherein said key management and control platform further comprises an external data interface, said external data interface comprising a USB interface, an RJ45 interface, a serial interface, and a CAN interface, said external data interface being connected to a designated port of said ARM core board.

4. The key management and control system of claim 2, wherein the key management and control platform further comprises a wireless signal transceiver comprising any one or more of a 4G wireless signal transceiver, a WiFi wireless signal transceiver, a LoRa wireless signal transceiver, an NB-loT wireless signal transceiver, or a 5G wireless signal transceiver, the wireless signal transceiver connected to a designated port of the ARM core board.

5. The key management system of claim 1, wherein the mechanical key management module comprises: the intelligent key lock control system comprises a first micro control unit, a CAN controller, a plurality of mechanical key lock control units and an RFID module, wherein the CAN controller, each mechanical key lock control unit and the RFID module are connected to a designated port of the first micro control unit.

6. The key management system of claim 5, wherein each of the mechanical key lock units of the mechanical key management module includes at least one mechanical key lock and a status warning light for the mechanical key lock.

7. The key management system of claim 1, wherein the smart key management assembly comprises: the intelligent key lock control system comprises a second micro control unit, a CAN controller, an intelligent key communication interface and an intelligent key lock control unit, wherein the CAN controller, the intelligent key communication interface and the intelligent key lock control unit are connected to a designated port of the second micro control unit.

8. The key management and control system of claim 7, wherein the fob communication interface of the fob management assembly includes at least a fob charge detection interface and a fob hall detection interface.

9. The key management and control system according to claim 2, 5 or 7, wherein the CAN controller includes a CAN transceiver and an optocoupler connected to one end of the CAN transceiver, and the other end of the CAN transceiver is connected to the CAN bus.

10. The key management and control system according to claim 5 or 7, wherein said mechanical key management module and said smart key management module further comprise audible and visual alarms connected to designated ports of corresponding micro control units.

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