CN219204558U - Network video recorder and network video recorder system - Google Patents
Network video recorder and network video recorder system Download PDFInfo
- Publication number
- CN219204558U CN219204558U CN202223136759.1U CN202223136759U CN219204558U CN 219204558 U CN219204558 U CN 219204558U CN 202223136759 U CN202223136759 U CN 202223136759U CN 219204558 U CN219204558 U CN 219204558U
- Authority
- CN
- China
- Prior art keywords
- control unit
- unit
- network
- video recorder
- hard disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
A network video recorder and a network video recorder system, the network video recorder comprises a first control unit and a second control unit which are connected with each other, a storage unit connected with the first control unit and the second control unit, a first network communication unit connected with the storage unit, and a second network communication unit connected with the second control unit; under the condition that the second control unit is abnormal and/or the second network communication unit is abnormal, the first control unit controls the storage unit to establish communication with external equipment through the first network communication unit; the external device is used for executing data read-write operation on the storage unit, and solves the problem that the hard disk file cannot be read for the fault NVR device in the prior art.
Description
Technical Field
The utility model relates to the field of security monitoring, in particular to a network video recorder and a network video recorder system.
Background
The network video recorder (Network Video Recorder, NVR) is an important device of the network video monitoring system, and is used for receiving, storing and managing the digital video code stream sent by the network camera. Because the NVR bears the functions of storing and forwarding the video, and the requirements for forwarding and viewing the video in real time are high, when the NVR fails in actual use, the real-time forwarding and viewing of the video file may be affected, for example, the CPU of the NVR fails, or the network transmission chip fails, etc. And limited to the field condition and the client requirement of the NVR, in some cases, even if a maintainer determines that a certain NVR device fails, the maintainer cannot read or copy the file content on the hard disk of the NVR device, and the timeliness requirement of viewing and sharing the video file cannot be met.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a network video recorder and a network video recorder system, which solve the problem that the hard disk file cannot be read from the failed NVR device in the prior art.
In a first aspect, in this embodiment, there is provided a network video recorder including a first control unit and a second control unit connected to each other, a storage unit connected to the first control unit and the second control unit, a first network communication unit connected to the storage unit, and a second network communication unit connected to the second control unit;
under the condition that the second control unit is abnormal and/or the second network communication unit is abnormal, the first control unit controls the storage unit to establish communication with external equipment through the first network communication unit; the external device is used for executing data read-write operation on the storage unit.
In a further embodiment, the first control unit is in communication with the second control unit via a heartbeat signal; in the case that the heartbeat signal is not received, the first control unit determines that the second control unit is abnormal.
In a further embodiment, the second control unit sends a network anomaly signal to the first control unit in case no data transmission signal sent by the second network communication unit is received, and the first control unit determines that the second network communication unit is anomalous according to the network anomaly signal.
In a further embodiment, the storage unit includes a hard disk controller and a hard disk connected to the hard disk controller;
the first control unit is used for sending a host switching signal to the hard disk controller;
the hard disk controller is used for switching a control host from the second control unit to the external equipment according to the host switching signal, and executing read-write operation on the hard disk according to a read instruction or a write instruction of the external equipment.
In a further embodiment, the first network communication unit comprises a wireless communication module, the wireless communication module being connected to the first control unit;
the wireless communication module is used for receiving a wireless starting signal sent by the first control unit and carrying out wireless communication with the external equipment according to the wireless starting signal;
the wireless communication module is also used for forwarding the reading instruction or the writing instruction to the hard disk controller and forwarding corresponding return data to the external equipment.
In a further embodiment, the first network communication unit comprises a wired communication module; the wired communication module is connected with the external equipment in a wired way;
the wired communication module is used for forwarding the reading instruction or the writing instruction to the hard disk controller and forwarding corresponding return data to the external equipment.
In a further embodiment, the wired communication module is connected to the external device through one of a SATA interface, a SAS interface, a PCIE interface, and a USB interface.
In a further embodiment, the network video recorder further comprises an acousto-optic alarm unit connected with the first control unit;
the first control unit is used for sending an alarm signal corresponding to the abnormality, and the acousto-optic alarm unit is used for carrying out acousto-optic alarm according to the alarm signal.
In a second aspect, in this embodiment, there is provided a network video recorder system, including the network video recorder according to the first aspect, and an external device in wired or wireless communication with the network video recorder.
In a further embodiment, the external device includes a power supply unit, where the power supply unit is connected to the storage unit through a first network communication unit;
the power supply unit is used for supplying power to the storage unit.
The network video recorder comprises a first control unit, a second control unit, a storage unit and a first network communication unit, wherein the second control unit, the storage unit and the first network communication unit are connected with the first control unit; the second network communication unit is connected with the second control unit; when the second control unit and/or the second network communication unit work abnormally, the first control unit can timely find the abnormality through the connection relation with the second control unit, and control the storage unit to establish communication with the external device through the first network communication unit, so that the external device controls the storage unit to read and write data on the storage unit, and the problem that the hard disk file of the fault NVR device cannot be read in the prior art is solved.
Drawings
FIG. 1 is a schematic diagram of a network video recorder according to some embodiments of the present application;
FIG. 2 is a schematic diagram of a network video recorder according to further embodiments of the present application;
fig. 3 is a schematic connection diagram of a first control unit, a storage unit, a first network communication unit, and an external device according to some embodiments of the present application;
fig. 4 is a schematic connection diagram of a first control unit, a storage unit, a first network communication unit, and an external device according to other embodiments of the present application;
fig. 5 is a schematic diagram of a network video recorder system according to some embodiments of the present application.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only. The terms "first," "second," and the like are used merely for distinguishing between elements and not for describing a sequential order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings. In describing the embodiments of the present utility model in detail, the drawings showing the partial structure of the device are not partially enlarged to general scale for convenience of description, and the schematic drawings are merely examples, which should not limit the scope of the present utility model.
The network video recorder provided by the embodiment of the utility model is further described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a network video recorder according to some embodiments of the present application. The network video recorder comprises a first control unit 11 and a second control unit 12 which are connected with each other, a storage unit 13 connected with the first control unit 11 and the second control unit 12, a first network communication unit 14 connected with the storage unit 13, and a second network communication unit 15 connected with the second control unit 12; those skilled in the art will appreciate that the configuration of the network video recorder shown in fig. 1 is merely illustrative and that the network video recorder may actually include more functional units than those shown in fig. 1.
In the case where the second control unit 12 is abnormal and/or the second network communication unit 15 is abnormal, the first control unit 11 controls the storage unit 13 to establish communication with the external device through the first network communication unit 14; the external device is used for performing data read-write operation on the storage unit 13.
The first control unit 11 may be an auxiliary control unit of a network video recorder, such as an MCU, a single-chip microcomputer, etc. The second control unit 12 may be a master control unit of a network video recorder or a control unit for controlling network communication, such as a central processing unit CPU. The storage unit 13 may include a hard disk and a hard disk control device. The second network communication unit 15 may be a wired or wireless network card, including a network communication chip, a network communication interface, etc., and may transmit data through a wired or wireless network to perform network communication with other devices. The first network communication unit 14 may be a wired or wireless network card, or a functional unit such as a bus communication module that enables communication with other devices.
Under the condition that the network video recorder works normally, the second control unit 12 controls the data read-write of the storage unit 13, accesses the storage unit 13 according to the data read command received by the second network communication unit 15, and sends the read data to a server or other devices through the second network communication unit 15 so as to realize the sharing of video data. However, in some fault or abnormal situations, for example, the second control unit 12 is suspended, the chip fails, etc., and the control function cannot be implemented, or the network communication interface in the second network communication unit 15 is damaged, the network communication chip is abnormal, etc., and the data transmission function cannot be implemented, the network video recorder cannot implement the reading and sharing of the video data.
In this case, the data transmission path of the second network communication unit 15-the second control unit 12-the storage unit 13 cannot realize the data transmission function, the first control unit 11 can timely detect the abnormality of the data transmission path through the connection with the second control unit 12, and control the storage unit 13 to establish communication with the external device through the first network communication unit 14, that is, establish the data transmission path in the abnormal condition of the external device-the first network communication unit 14-the storage unit 13. The first network communication unit 14 and the second network communication unit 15 may be regarded as two external interfaces of the network video recorder, wherein the second network communication unit 15 is an external interface under normal conditions, and the first network communication unit 14 is an external interface when an abnormality occurs in the device. After the transmission path of the external device, namely the first network communication unit 14 and the storage unit 13 is established, the external device can send a data read-write command to the storage unit 13, and the storage unit 13 returns corresponding data according to the read-write command, so that video data reading and external transmission are realized, and the problem that hard disk file reading cannot be performed on the fault NVR device in the prior art is solved.
In some embodiments, the first control unit 11 is in communication with the second control unit 12 via heartbeat signals; in the case where the heartbeat signal is not received, the first control unit 11 determines that the second control unit 12 is abnormal.
The first control unit 11 determines whether the operation state of the second control unit 12 is normal or not by the heartbeat signal. Normally, the second control unit 12 sends a heartbeat signal to the first control unit 11 every a period of time, when the second control unit 12 is in an abnormal state such as hanging, the first control unit 11 cannot receive the heartbeat signal within a preset time, the second control unit 12 is determined to be abnormal, specific functional units and components in the abnormal state are determined, the storage unit 13 is controlled to establish communication with external devices through the first network communication unit 14, and a new data transmission path is established.
In some embodiments, the second control unit 12 sends a network anomaly signal to the first control unit 11, from which the first control unit 11 determines that the second network communication unit 15 is anomalous, in case no data transmission signal sent by the second network communication unit 15 is received.
The second control unit 12 and the second network communication unit 15 may be connected through a data transmission bus, which may be a PCIe bus. The data transfer signal may be a PCIe signal, an RGMII signal, etc. If the second control unit 12 does not receive the data transmission signal for a certain time, it is determined that the second network communication unit 15 is abnormal. In the case where the communication between the second control unit 12 and the first control unit 11 is normal, the second control unit 12 sends a network abnormality signal to the first control unit 11, the first control unit 11 determines that the second network communication unit 15 is abnormal according to the network abnormality signal, determines specific functional units and components in which abnormality occurs, and controls the storage unit 13 to establish communication with an external device through the first network communication unit 14, and establishes a new data transmission path.
In some embodiments, fig. 2 is a schematic structural diagram of a network video recorder according to other embodiments of the present application. Referring to fig. 2, the storage unit 13 includes a hard disk controller 131 and a hard disk 132 connected to the hard disk controller 131.
The first control unit 11 is configured to send a host switching signal to the hard disk controller 131;
the hard disk controller 131 is configured to switch the control host from the second control unit 12 to the external device according to the host switching signal, and perform a read/write operation on the hard disk 132 according to a read command or a write command of the external device.
The hard disk controller 131 is used for converting a read-write command of the control host to the hard disk 132 into a corresponding read-write signal, and writing data into the hard disk 132 or reading data from the hard disk 132 according to a prescribed hard disk data format. Data may be transferred between the hard disk controller 131 and the hard disk 132 through SATA protocols. The hard disk controller 131 and its control host may perform master-slave communication. The hard disk controller 131 in the present embodiment may be a JMB575. Under normal conditions, the second control unit 12 is a control host of the hard disk controller 131, the second control unit 12 sends a read instruction or a write instruction to the hard disk controller 131, and the hard disk controller 131 returns a corresponding result to the second control unit 12.
In the case that the second control unit 12 is abnormal and/or the second network communication unit 15 is abnormal, the data transmission path of the second network communication unit 15-the second control unit 12-the storage unit 13 cannot realize the data transmission function, at this time, the first control unit 11 controls the hard disk controller 131 to establish a communication path with the external device through the first network communication unit 14, so that the external device and the hard disk controller 131 can realize data communication. On this basis, the first control unit 11 may send a host switching signal to the hard disk controller 131, and after receiving the host switching signal, the hard disk controller 131 switches the control host from the second control unit 12 to the external device, i.e. does not accept the control of the second control unit 12 any more, but accepts the control of the external device. The external device serves as a control host, and can send a read instruction or a write instruction to the hard disk controller 131, and the hard disk controller 131 returns a corresponding result to realize the reading and writing of the hard disk data under the condition that the second control unit 12 is abnormal and/or the second network communication unit 15 is abnormal.
In some embodiments, fig. 3 is a schematic connection diagram of the first control unit, the storage unit, the first network communication unit, and the external device according to some embodiments of the present application. As shown in fig. 3, the first network communication unit 14 includes a wireless communication module 141, and the wireless communication module 141 is connected to the first control unit 11.
The wireless communication module 141 is configured to receive a wireless start signal sent by the first control unit 11, and perform wireless communication with the external device 21 according to the wireless start signal;
the wireless communication module 141 is further configured to forward the read instruction or the write instruction to the hard disk controller 131, and forward corresponding return data to the external device 21.
In this embodiment, the wireless communication module 141 may be a communication module using protocols such as WIFI, zigbee, bluetooth, etc., and the hard disk controller 131 and the external device 21 perform data transmission through the wireless communication module 141. After the first control unit 11 detects the abnormality, a wireless start signal is sent to the wireless communication module 141 to start the wireless communication function, and the wireless communication module 141 establishes wireless communication connection with the external device 21, thereby realizing data communication between the hard disk controller 131 and the external device 21.
In some embodiments, fig. 4 is a schematic connection diagram of the first control unit, the storage unit, the first network communication unit, and the external device according to other embodiments of the present application. As shown in fig. 4, the first network communication unit 14 includes a wired communication module 142; the wired communication module 142 is connected with the external device 21 in a wired manner;
the wired communication module 142 is configured to forward the read instruction or the write instruction to the hard disk controller 131, and forward corresponding return data to the external device 21.
In this embodiment, the wired communication module 142 may be a communication module that performs data transmission through an internet transmission protocol or other bus protocols. The internet transmission protocol may be TCP protocol, etc., and the other bus protocol may be PCIE, USB, etc. The first network communication unit 14 includes a wired communication module 142, and the hard disk controller 131 and the external device 21 perform data transmission through the wired communication module 142. After the first control unit 11 detects an abnormality, it sends a host switching signal to the hard disk controller 131; the hard disk controller 131 switches the control host from the second control unit 12 to the external device 21 according to the host switching signal, and establishes master-slave communication connection with the external device 21 through the wired communication module 142, thereby realizing control of the external device 21 on the hard disk controller 131. When the external device 21 sends a read instruction or a write instruction to the hard disk controller 131, the wired communication module 142 forwards the instruction and forwards the corresponding return data to the external device 21, thereby realizing data communication between the hard disk controller 131 and the external device 21.
In some embodiments, the first network communication unit 14 may also include both a wireless communication module 141 and a wired communication module 142. The first control unit 11 may select one of the communication modules according to actual requirements, or select one of the communication modules according to the priority order of the two to perform data transmission, for example, if the wireless communication module 141 exists, the wireless communication module 141 is preferentially selected.
In some embodiments, the wired communication module 142 is connected to the external device 21 through one of a SATA interface, a SAS interface, a PCIE interface, and a USB interface. In practical applications, if the hard disk 132 is a SATA interface hard disk or a SAS interface hard disk, communication between the external device 21 and the hard disk controller 131 may be implemented through the SATA interface or the SAS interface, so as to maximize the data transmission rate. The PCIE interface and the USB interface are common interface types of the external device 21, and in the case that the wired communication module 142 supports the PCIE interface and the USB interface, compatibility of different types of external devices 21 can be improved.
In some embodiments, the network video recorder further comprises an audible and visual alert unit connected to the first control unit;
the first control unit is used for sending an alarm signal corresponding to the abnormality, and the acousto-optic alarm unit is used for carrying out acousto-optic alarm according to the alarm signal.
Besides the failure of the transmission function of the video data, the abnormality of the second control unit and/or the second network communication unit of the network video recorder may cause other faults, and if the operator does not find the abnormality in time, the whole network video recorder may be stopped, or the normal operation of the video monitoring system is affected. The abnormality can be notified to an operator in an audible and visual alarm mode, and the operator can timely maintain equipment according to the abnormality, so that the influence of the abnormality on the network video recorder and the video monitoring system is avoided.
The first control unit determines that the second control unit and/or the second network communication unit is abnormal according to the receiving conditions of the heartbeat signal and the network abnormal signal, and sends an alarm signal corresponding to the abnormality to the acousto-optic alarm unit, and the acousto-optic alarm unit carries out corresponding acousto-optic alarm.
The embodiment of the utility model also provides a network video recorder system. The network video recorder system comprises the network video recorder of the embodiment and an external device which is in wired or wireless communication with the network video recorder.
Under the condition that the network video recorder is abnormal in network communication or the control unit is abnormal, the network video recorder system of the embodiment establishes communication between the external equipment and the hard disk controller through the first network communication unit, so that the external equipment controls the hard disk controller to read and write data on the hard disk, and the problem that the hard disk file of the fault NVR equipment cannot be read in the prior art is solved.
In some embodiments, please refer to fig. 5, which is a schematic diagram illustrating a network video recorder system according to some embodiments of the present application. The external device 21 includes a power supply unit 211, and the power supply unit 211 is connected to the storage unit 13 through the first network communication unit 14;
the power supply unit 211 is for supplying power to the storage unit 13.
The external device 21 in the present embodiment includes a power supply unit 211, and the power supply unit 211 is connected to the storage unit 13 through the first network communication unit 14. In the case that a power supply abnormality occurs in the storage unit 13 of the network video recorder, the power supply unit 211 in the external device 21 supplies power to the storage unit 13, including the hard disk controller 131 and the hard disk 132, through the first network communication unit 14. Therefore, under the condition that the power supply of the network video recorder to the storage unit 13 is abnormal, the normal operation of the storage unit 13 is ensured, the read-write instruction of the external device 21 is ensured to be normally executed by the storage unit 13, and the influence of the power supply abnormality of the network video recorder on the data read-write is avoided.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the patent. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A network video recorder, comprising a first control unit and a second control unit which are connected with each other, a storage unit connected with the first control unit and the second control unit, a first network communication unit connected with the storage unit, and a second network communication unit connected with the second control unit;
under the condition that the second control unit is abnormal and/or the second network communication unit is abnormal, the first control unit controls the storage unit to establish communication with external equipment through the first network communication unit; the external device is used for executing data read-write operation on the storage unit.
2. The network video recorder of claim 1, wherein the first control unit is in communication with the second control unit via a heartbeat signal; in the case that the heartbeat signal is not received, the first control unit determines that the second control unit is abnormal.
3. The network video recorder of claim 1, wherein the second control unit transmits a network anomaly signal to the first control unit in the event that a data transmission signal transmitted by the second network communication unit is not received, the first control unit determining that the second network communication unit is anomalous based on the network anomaly signal.
4. The network video recorder of claim 1, wherein the storage unit comprises a hard disk controller and a hard disk connected to the hard disk controller;
the first control unit is used for sending a host switching signal to the hard disk controller;
the hard disk controller is used for switching a control host from the second control unit to the external equipment according to the host switching signal, and executing read-write operation on the hard disk according to a read instruction or a write instruction of the external equipment.
5. The network video recorder of claim 4, wherein the first network communication unit comprises a wireless communication module, the wireless communication module being coupled to the first control unit;
the wireless communication module is used for receiving a wireless starting signal sent by the first control unit and carrying out wireless communication with the external equipment according to the wireless starting signal;
the wireless communication module is also used for forwarding the reading instruction or the writing instruction to the hard disk controller and forwarding corresponding return data to the external equipment.
6. The network video recorder of claim 4, wherein the first network communication unit comprises a wired communication module; the wired communication module is connected with the external equipment in a wired way;
the wired communication module is used for forwarding the reading instruction or the writing instruction to the hard disk controller and forwarding corresponding return data to the external equipment.
7. The network video recorder of claim 6, wherein the wired communication module is connected to the external device through one of a SATA interface, a SAS interface, a PCIE interface, and a USB interface.
8. The network video recorder of claim 1, further comprising an audible and visual alarm unit coupled to the first control unit;
the first control unit is used for sending an alarm signal corresponding to the abnormality, and the acousto-optic alarm unit is used for carrying out acousto-optic alarm according to the alarm signal.
9. A network video recorder system, characterized in that it comprises a network video recorder according to any of claims 1-8, and an external device in wired or wireless communication with said network video recorder.
10. The network video recorder system of claim 9, wherein the external device comprises a power supply unit, the power supply unit being connected to the storage unit through a first network communication unit;
the power supply unit is used for supplying power to the storage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223136759.1U CN219204558U (en) | 2022-11-25 | 2022-11-25 | Network video recorder and network video recorder system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223136759.1U CN219204558U (en) | 2022-11-25 | 2022-11-25 | Network video recorder and network video recorder system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219204558U true CN219204558U (en) | 2023-06-16 |
Family
ID=86717320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223136759.1U Active CN219204558U (en) | 2022-11-25 | 2022-11-25 | Network video recorder and network video recorder system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219204558U (en) |
-
2022
- 2022-11-25 CN CN202223136759.1U patent/CN219204558U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1372076B1 (en) | Storage control system and method | |
| CN101866304B (en) | Server capable of detecting state of voltage regulator | |
| KR20080058454A (en) | A distributed monitoring method | |
| CN105159851A (en) | Multi-controller storage system | |
| CN103941625A (en) | Can bus data transmission monitoring system | |
| CN109062184A (en) | Two-shipper emergency and rescue equipment, failure switching method and rescue system | |
| CN202737901U (en) | 1553B bus automatic switching system | |
| CN219204558U (en) | Network video recorder and network video recorder system | |
| CN113176982A (en) | Device and method for realizing VPX architecture-based chassis management system | |
| US11314670B2 (en) | Method, apparatus, and device for transmitting file based on BMC, and medium | |
| CN217445454U (en) | Recording and broadcasting KVM (keyboard video mouse) seat system with optical network hot standby function | |
| CN112015600A (en) | Log information processing system, log information processing method and device and switch | |
| CN112822039B (en) | Main and standby mode switching method for dual-machine hot standby system | |
| CN212723930U (en) | Novel PSU redundancy management circuit | |
| CN103618735A (en) | Method for monitoring security of field level control network | |
| JPH0223120B2 (en) | ||
| JPS596735A (en) | Defect notifying system | |
| CN115473761B (en) | Communication method, system, equipment and medium of CAN bus based on DCS system | |
| CN114301941B (en) | Management method and device of power equipment and storage medium | |
| KR100330742B1 (en) | A communication system for controlling remote place using multi-level communication unit with redundancy | |
| JPH10247962A (en) | Computer communication monitor system | |
| JPH0427239A (en) | Control method for lan connecting device | |
| CN114968665A (en) | CPLD firmware switching method, system, device and server | |
| KR0129100B1 (en) | Automatic broadcasting control system | |
| KR100319799B1 (en) | Status Information Management System and Method in Redundant Board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |