CN108121622B - Health management device based on Ethernet and I2C dual-redundancy bus - Google Patents
Health management device based on Ethernet and I2C dual-redundancy bus Download PDFInfo
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- CN108121622B CN108121622B CN201711332102.3A CN201711332102A CN108121622B CN 108121622 B CN108121622 B CN 108121622B CN 201711332102 A CN201711332102 A CN 201711332102A CN 108121622 B CN108121622 B CN 108121622B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2017—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where memory access, memory control or I/O control functionality is redundant
Abstract
The invention belongs to the technical field of cabinet system health management, and particularly relates to a health management device based on Ethernet and an I2C dual-redundancy bus. The invention adds an Ethernet management bus based on a switching strategy on the basis of carrying out cabinet system health management by using an I2C bus of a master-slave structure. When the I2C temperature measurement bus in the board card conflicts with the I2C bus in an interruption manner or when the I2C main board card is abnormal, the Ethernet can be used as a redundant backup bus to report the system health management information.
Description
Technical Field
The invention belongs to the technical field of cabinet system health management, and particularly relates to a health management device based on Ethernet and an I2C dual-redundancy bus.
Background
With the wider application of the I2C bus in the field of system health management, the reliability thereof is of particular importance. In a practical application environment for health management based on an I2C bus, each board card in the cabinet transmits and reports real-time voltage, current, temperature and other information through the I2C bus, so as to realize monitoring and early warning of the health condition of the system.
A temperature measuring chip of an I2C interface is also arranged in each board card of the system. When the CPU in the board measures the temperature through the I2C interface, the board cannot respond to the interrupt request sent by the I2C bus of the system, and therefore the system has a risk that the health information cannot be reported.
The nodes of the I2C are based on a master-slave structure, and the master node of the I2C is responsible for information scheduling of the whole bus. The I2C board card where the main node is located is abnormal, which may cause information transmission paralysis of the I2C bus of the whole system, and affect health condition monitoring and key information reporting of the related board cards.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a health management device based on Ethernet and an I2C dual redundant bus.
(II) technical scheme
In order to solve the above technical problem, the present invention provides a health management device based on ethernet and I2C dual redundant bus, the device comprising: the upper layer interface module, the health information acquisition module and the health information management module;
the device is used for carrying out health management on two fault modes which cause that the system I2C bus cannot report the health information:
the first method comprises the following steps: and interrupt access conflict exists between the bus of the system I2C and the temperature measuring chip I2C in the board card.
And the second method comprises the following steps: the I2C master node board card CPU fails.
In the upper layer interface module, the upper computer communicates with an I2C main node board card and a standby communication board card in the cabinet through 2 paths of RS485 serial ports respectively, and is used for sending a health information query command and receiving health information of each board card in the cabinet.
The health information acquisition module is a general module in each board card in the cabinet and is responsible for acquiring voltage, current and temperature health information of key devices in the board cards; the module comprises a CPU, a pressure measuring circuit, a current measuring circuit and a temperature measuring chip, wherein the CPU reads the temperature information of the temperature measuring chip through an I2C interface.
Wherein the health information management module comprises a system I2C bus and an Ethernet bus; the system I2C bus is the preferred bus for transmitting health information, and the Ethernet is the spare bus for transmitting health information; the health information acquisition modules of all board cards in the cabinet are connected with the two buses.
In the working process of inquiring the health information of the board card N, the health management device comprises the following working links when the system has no fault:
and (3) link 11: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and (3) link 12: after receiving the command of the upper interface module, the CPU of the I2C master node board sends a query command to the health information acquisition module of the board N via the I2C bus of the system.
And (3) link: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (4) link: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through a system I2C bus;
and (5) link 15: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
In the working process of inquiring the health information of the board N, the health management device comprises the following links when a first fault occurs:
and (3) link 21: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and (4) link 22: after receiving the command of the upper interface module, the CPU of the I2C master node board sends a query command to the health information acquisition module of the board N via the I2C bus of the system.
And (3) link 23: the inquiry command of the system I2C bus conflicts with the I2C bus for temperature measurement in the board card N health information acquisition module; at this time, the CPU of the I2C main node board card does not return the health information of the board card N; the CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
and (3) link 24: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (5) link 25: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through the Ethernet;
link 26: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
In the working process of inquiring the health information of the board N, the health management device comprises the following steps when a second fault occurs:
and a link 31: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and a link 32: a CPU of the main node board card I2C fails; the I2C main node board card cannot complete the receiving and forwarding of the command; at this time, the upper interface module does not return the health information of the board card N; the upper computer of the upper layer interface module sends a query command to a CPU of the standby communication board card through a second RS485 interface;
link 33: after receiving the command of the upper interface module, the CPU of the standby communication board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
and a link 34: after a health information acquisition module of the board card N receives a command from the standby communication board card, a CPU in the module acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (5) link 35: the health information acquisition module of the card N transmits the acquired health information to the CPU of the standby communication board card through the ethernet. (ii) a
Link 36: and after receiving the health information of the board N, the CPU of the standby communication board sends the health information of the board N to the upper interface module through the second RS485 interface.
(III) advantageous effects
The invention adds an Ethernet management bus based on a switching strategy on the basis of carrying out cabinet system health management by using an I2C bus of a master-slave structure. When the I2C temperature measurement bus in the board card conflicts with the I2C bus in an interruption manner or when the I2C main board card is abnormal, the Ethernet can be used as a redundant backup bus to report the system health management information.
Drawings
Fig. 1 is a system configuration diagram of a health management apparatus.
FIG. 2 is an I2C primary bus work flow diagram.
Fig. 3 is a first failure mode operational flow diagram.
Fig. 4 is a second failure mode operational flow diagram.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The invention mainly aims at a cabinet system for performing health management by applying an I2C bus, and designs a health management device based on an Ethernet and an I2C dual redundant bus. According to the method, two buses of Ethernet and I2C are used for connecting all board cards in the cabinet, and all the board cards can transmit health management information through two channels of Ethernet or I2C according to the requirements of upper-layer users. The upper computer utilizes the RS485 serial port to communicate commands and data with the cabinet system, the board card where the main node of the system I2C is located serves as a main interface for communicating with the upper computer, and any other board card serves as a standby communication interface for communicating with the upper computer. The redundant backup is carried out by utilizing the Ethernet and the I2C bus, so that the problem that the key information of the board card cannot be transmitted or fails to be reported when the I2C bus is independently used is solved, and the reliability of the health management system is improved.
In order to solve the above technical problem, the present invention provides a health management device based on ethernet and I2C dual redundant bus, the device comprising: the upper layer interface module, the health information acquisition module and the health information management module;
the device is used for carrying out health management on two fault modes which cause that the system I2C bus cannot report the health information:
the first method comprises the following steps: and interrupt access conflict exists between the bus of the system I2C and the temperature measuring chip I2C in the board card.
And the second method comprises the following steps: the I2C master node board card CPU fails.
In the upper layer interface module, the upper computer communicates with an I2C main node board card and a standby communication board card in the cabinet through 2 paths of RS485 serial ports respectively, and is used for sending a health information query command and receiving health information of each board card in the cabinet.
The health information acquisition module is a general module in each board card in the cabinet and is responsible for acquiring voltage, current and temperature health information of key devices in the board cards; the module comprises a CPU, a pressure measuring circuit, a current measuring circuit and a temperature measuring chip, wherein the CPU reads the temperature information of the temperature measuring chip through an I2C interface.
Wherein the health information management module comprises a system I2C bus and an Ethernet bus; the system I2C bus is the preferred bus for transmitting health information, and the Ethernet is the spare bus for transmitting health information; the health information acquisition modules of all board cards in the cabinet are connected with the two buses.
In the working process of inquiring the health information of the board card N, the health management device comprises the following working links when the system has no fault:
and (3) link 11: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and (3) link 12: after receiving the command of the upper interface module, the CPU of the I2C master node board sends a query command to the health information acquisition module of the board N via the I2C bus of the system.
And (3) link: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (4) link: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through a system I2C bus;
and (5) link 15: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
In the working process of inquiring the health information of the board N, the health management device comprises the following links when a first fault occurs:
and (3) link 21: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and (4) link 22: after receiving the command of the upper interface module, the CPU of the I2C master node board sends a query command to the health information acquisition module of the board N via the I2C bus of the system.
And (3) link 23: the inquiry command of the system I2C bus conflicts with the I2C bus for temperature measurement in the board card N health information acquisition module; at this time, the CPU of the I2C main node board card does not return the health information of the board card N; the CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
and (3) link 24: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (5) link 25: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through the Ethernet;
link 26: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
In the working process of inquiring the health information of the board N, the health management device comprises the following steps when a second fault occurs:
and a link 31: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and a link 32: a CPU of the main node board card I2C fails; the I2C main node board card cannot complete the receiving and forwarding of the command; at this time, the upper interface module does not return the health information of the board card N; the upper computer of the upper layer interface module sends a query command to a CPU of the standby communication board card through a second RS485 interface;
link 33: after receiving the command of the upper interface module, the CPU of the standby communication board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
and a link 34: after a health information acquisition module of the board card N receives a command from the standby communication board card, a CPU in the module acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (5) link 35: the health information acquisition module of the card N transmits the acquired health information to the CPU of the standby communication board card through the ethernet. (ii) a
Link 36: and after receiving the health information of the board N, the CPU of the standby communication board sends the health information of the board N to the upper interface module through the second RS485 interface.
In addition, the invention also provides a health management method based on Ethernet and the I2C dual redundant bus, which is implemented based on a health management system, and the system comprises: the upper layer interface module, the health information acquisition module and the health information management module;
the method is used for health management aiming at the following two fault modes which cause that the system I2C bus can not report the health information:
the first method comprises the following steps: and interrupt access conflict exists between the bus of the system I2C and the temperature measuring chip I2C in the board card.
And the second method comprises the following steps: the I2C master node board card CPU fails.
In the upper layer interface module, the upper computer communicates with an I2C main node board card and a standby communication board card in the cabinet through 2 paths of RS485 serial ports respectively, and is used for sending a health information query command and receiving health information of each board card in the cabinet.
The health information acquisition module is a general module in each board card in the cabinet and is responsible for acquiring voltage, current and temperature health information of key devices in the board cards; the module comprises a CPU, a pressure measuring circuit, a current measuring circuit and a temperature measuring chip, wherein the CPU reads the temperature information of the temperature measuring chip through an I2C interface.
Wherein the health information management module comprises a system I2C bus and an Ethernet bus; the system I2C bus is the preferred bus for transmitting health information, and the Ethernet is the spare bus for transmitting health information; the health information acquisition modules of all board cards in the cabinet are connected with the two buses.
In the working process of inquiring the health information of the board N, the health management device comprises the following steps when the system has no fault:
step 11: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
step 12: after receiving the command of the upper interface module, the CPU of the I2C master node board sends a query command to the health information acquisition module of the board N via the I2C bus of the system.
Step 13: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
step 14: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through a system I2C bus;
step 15: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
In the working process of inquiring the health information of the board N, the health management device comprises the following steps when a first fault occurs:
step 21: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
step 22: after receiving the command of the upper interface module, the CPU of the I2C master node board sends a query command to the health information acquisition module of the board N via the I2C bus of the system.
Step 23: the inquiry command of the system I2C bus conflicts with the I2C bus for temperature measurement in the board card N health information acquisition module; at this time, the CPU of the I2C main node board card does not return the health information of the board card N; the CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
step 24: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
step 25: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through the Ethernet;
step 26: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
In the working process of inquiring the health information of the board N, the health management device comprises the following steps when a second fault occurs:
step 31: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
step 32: a CPU of the main node board card I2C fails; the I2C main node board card cannot complete the receiving and forwarding of the command; at this time, the upper interface module does not return the health information of the board card N; the upper computer of the upper layer interface module sends a query command to a CPU of the standby communication board card through a second RS485 interface;
step 33: after receiving the command of the upper interface module, the CPU of the standby communication board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
step 34: after a health information acquisition module of the board card N receives a command from the standby communication board card, a CPU in the module acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
step 35: the health information acquisition module of the card N transmits the acquired health information to the CPU of the standby communication board card through the ethernet. (ii) a
Step 36: and after receiving the health information of the board N, the CPU of the standby communication board sends the health information of the board N to the upper interface module through the second RS485 interface.
Example 1
There are two failure modes in this embodiment that result in the system I2C bus not being able to report health information.
The first method comprises the following steps: and interrupt access conflict exists between the bus of the system I2C and the temperature measuring chip I2C in the board card.
And the second method comprises the following steps: the I2C master node board card CPU fails.
In view of the above two problems, the present invention will be described in detail with reference to the accompanying drawings.
The invention comprises three modules, as shown in fig. 1:
module-upper layer interface module
The upper computer in the module is respectively communicated with an I2C main node board card and a standby communication board card in the cabinet through 2 paths of RS485 serial ports, and is used for sending a health information query command and receiving health information of each board card in the cabinet.
Module two health information acquisition module
The acquisition module is a universal module inside each board card in the cabinet and is responsible for acquiring the voltage, current, temperature and other health information of key devices inside the board cards. The module comprises a CPU, a pressure measuring circuit, a current measuring circuit and a temperature measuring chip, wherein the CPU reads the temperature information of the temperature measuring chip through an I2C interface.
Module three health information management module
The module includes a system I2C bus and an ethernet bus. The system I2C bus is the preferred bus for transporting health information, and the ethernet is the alternate bus for transporting health information. The health information acquisition modules of all board cards in the cabinet are connected with the two buses.
The health information of the board N is queried as an example to explain the working principle of the system.
The operation principle a of the system without faults is shown in fig. 2.
Step A.1, the upper computer of the upper layer interface module sends a query command to a health information acquisition module of the I2C main node board card through the first RS485 interface.
And step A, after the CPU of the host node board card of the step A.2I2C receives the command of the upper interface module, the CPU sends a query command to the health information acquisition module of the board card N through a system I2C bus.
And step A.3, after the health information acquisition module of the board card N receives a command from the I2C main node board card, a CPU in the module acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit.
And step A.4, the health information acquisition module of the board card N transmits the acquired health information to the CPU of the main node board card I2C through a system I2C bus.
And step A, after the CPU of the host node board card in the step A.5I2C receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
The operating principle B in the case of a first fault is shown in fig. 3.
Step B.1 is the same as step A.1
Step B.2 is the same as step A.2
And step B.3, the inquiry command of the I2C bus of the system conflicts with the I2C bus for temperature measurement in the board card N health information acquisition module. At this time, the CPU of the I2C master node board does not have the health information of the board N to return. The CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through the Ethernet.
Step B.4 is the same as step A.3
And B.5, the health information acquisition module of the board card N transmits the acquired health information to the CPU of the main node board card I2C through the Ethernet.
Step B.6 is the same as step A.5
The operating principle C in the presence of a second fault is shown in fig. 4.
Step C.1 is the same as step A.1
And C.2I2C main node board card CPU fails. The I2C master node board card cannot complete the reception and forwarding of commands. At this time, the upper interface module does not return the health information of the board N. And the upper computer of the upper interface module sends a query command to the CPU of the standby communication board card through the second RS485 interface.
And C.3, after the CPU of the standby communication board card receives the command of the upper interface module, sending a query command to the health information acquisition module of the board card N through the Ethernet.
And C.4, after the health information acquisition module of the board card N receives the command from the standby communication board card, the CPU in the module acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit.
And C.5, the health information acquisition module of the board card N transmits the acquired health information to the CPU of the standby communication board card through the Ethernet.
And C.6, after the CPU of the standby communication board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the second RS485 interface.
Example 2
The embodiment comprises the following steps:
periodically acquiring board card health information
Each board card in the cabinet periodically acquires health information such as voltage, current, temperature and the like of key devices in the board card by using a CPU timer, stores the information into an EEPROM (electrically erasable programmable read-only memory) in the board and periodically updates the information.
Step two I2C Master bus management
The I2C bus is the preferred bus for transferring health information. The host computer sends a command to the board card where the I2C master node is located through the RS485 serial port, the master node forwards the command to the corresponding I2C slave node after receiving the request command sent by the host computer, and the I2C slave node feeds back the board information to the master node and reports the board information to the host computer.
Step three Ethernet standby bus management
If the I2C master node CPU does not receive the information fed back by the corresponding I2C slave node within the specified time, the interrupt conflict between the I2C temperature measurement bus in the board card and the I2C bus of the system is shown. At the moment, the main node sends the command to the corresponding board card again through the Ethernet, and the board card feeds back the health information of the board card to the main node, and then the health information is reported to the upper computer by the main node.
If the upper computer does not receive the information reported by the I2C main node board card within the specified time, the I2C board card where the main node is located is abnormal. At the moment, the upper computer sends a request command to the standby communication board card through another RS485 serial port, the standby communication board card forwards the command and transmits information through the Ethernet, and finally the standby board card reports the health information to the upper computer.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A health management device based on ethernet and I2C dual redundant buses, the device comprising: the upper layer interface module, the health information acquisition module and the health information management module;
the device is used for carrying out health management on two fault modes which cause that the system I2C bus cannot report the health information:
the first method comprises the following steps: an interrupt access conflict exists between the bus of the system I2C and the temperature measurement chip I2C in the board card;
and the second method comprises the following steps: I2C main node board card CPU is failed;
in the upper layer interface module, an upper computer is respectively communicated with an I2C main node board card and a standby communication board card in the cabinet through 2 paths of RS485 serial ports, and is used for sending a health information query command and receiving health information of each board card in the cabinet;
the health information acquisition module is a general module in each board card in the cabinet and is responsible for acquiring voltage, current and temperature health information of key devices in the board cards; the module comprises a CPU, a pressure measuring circuit, a current measuring circuit and a temperature measuring chip, wherein the CPU reads the temperature information of the temperature measuring chip through an I2C interface;
the health information management module comprises a system I2C bus and an Ethernet bus; the system I2C bus is the preferred bus for transmitting health information, and the Ethernet is the spare bus for transmitting health information; the health information acquisition modules of all board cards in the cabinet are connected with the two buses;
in the working process of inquiring the health information of the board card N, the health management device comprises the following working links when the system has no fault:
and (3) link 11: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and (3) link 12: after receiving the command of the upper interface module, the CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through a system I2C bus;
and (3) link: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (4) link: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through a system I2C bus;
and (5) link 15: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
2. The ethernet and I2C dual redundant bus based health management device of claim 1, wherein during the operation of querying the health information of board N, the health management device comprises the following steps in case of the first failure:
and (3) link 21: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and (4) link 22: after receiving the command of the upper interface module, the CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through a system I2C bus;
and (3) link 23: the inquiry command of the system I2C bus conflicts with the I2C bus for temperature measurement in the board card N health information acquisition module; at this time, the CPU of the I2C main node board card does not return the health information of the board card N; the CPU of the I2C main node board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
and (3) link 24: after a health information acquisition module of the board card N receives a query command from the I2C main node board card, the CPU acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (5) link 25: the health information acquisition module of the board card N transmits the acquired health information to a CPU of the main node board card I2C through the Ethernet;
link 26: and after the CPU of the I2C main node board card receives the health information of the board card N, the health information of the board card N is sent to the upper layer interface module through the first RS485 interface.
3. The ethernet and I2C dual redundant bus based health management device of claim 2, wherein the health management device comprises the following steps in case of the second failure during the operation of querying the health information of board N:
and a link 31: an upper computer of the upper layer interface module sends a query command to the I2C main node board card through the first RS485 interface;
and a link 32: a CPU of the main node board card I2C fails; the I2C main node board card cannot complete the receiving and forwarding of the command; at this time, the upper interface module does not return the health information of the board card N; the upper computer of the upper layer interface module sends a query command to a CPU of the standby communication board card through a second RS485 interface;
link 33: after receiving the command of the upper interface module, the CPU of the standby communication board card sends a query command to the health information acquisition module of the board card N through the Ethernet;
and a link 34: after a health information acquisition module of the board card N receives a command from the standby communication board card, a CPU in the module acquires temperature information by using an in-board I2C bus, acquires voltage information by using a voltage measuring circuit and acquires current information by using a current measuring circuit;
and (5) link 35: the health information acquisition module of the card N transmits the acquired health information to a CPU of the standby communication board card through the Ethernet;
link 36: and after receiving the health information of the board N, the CPU of the standby communication board sends the health information of the board N to the upper interface module through the second RS485 interface.
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