CN110121046B - Flexibly-expanded video monitoring system and method - Google Patents
Flexibly-expanded video monitoring system and method Download PDFInfo
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- CN110121046B CN110121046B CN201910380810.7A CN201910380810A CN110121046B CN 110121046 B CN110121046 B CN 110121046B CN 201910380810 A CN201910380810 A CN 201910380810A CN 110121046 B CN110121046 B CN 110121046B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The invention provides a flexibly-expanded video monitoring system, a flexibly-expanded video monitoring method and a flexibly-expanded video monitoring system, which can timely, completely and accurately provide real-time production data and information for personnel far away from a control room display, improve the convenience of personnel communication during operation tests and maintenance and debugging, prevent equipment misoperation or other production accidents caused by unsmooth information communication, and ensure the safety of each process.
Description
Technical Field
The present disclosure relates to a flexible extended video surveillance system and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The modern industry widely uses displays (or called monitors, also including projection, large screen, etc., hereinafter referred to as displays) to monitor the process flow. The display is used for displaying the parameter information such as the running state of the equipment, the temperature or the pressure of the medium and the like. Such as: a display configured in an operator station and an engineer station of a distributed control system (hereinafter abbreviated as DCS), a display configured in an upper computer of a programmable logic controller (hereinafter abbreviated as PLC), and the like.
According to the inventor, only the personnel in the monitoring center can check the displayed production data and information in time and completely through the display based on the existing remote monitoring system, and during the start test operation, the overhaul and debugging and the like of the equipment, the operators and the overhaul personnel in the production field want to know the specific information, or need to move to the monitoring center to check the information on the display, or contact the on-duty personnel in front of the display through an interphone, a mobile phone or a fixed phone and the like to check and transfer the information to be seen. In the forwarding process, description inaccuracy or even errors sometimes occur, so that a person receiving information judges wrongly, and misoperation or other serious results of equipment are caused. In addition, as the centralized control room or the building where the DCS engineer station is located, which is provided with the display, generally has a strong shielding effect on radio signals, and even interphone or mobile phone is forbidden to be used in some places, people in front of the display can only use fixed phones when being contacted with workers in the production field, which is very inconvenient, especially during starting and debugging after equipment maintenance, time is tight, tasks are heavy, and the working efficiency is seriously influenced by the existing communication contact means.
In order to solve the above problems, some production sites transmit part of production real-time data (such as parameters of equipment operating state, medium temperature, pressure, and the like) to a plant monitoring information system (SIS) or other systems in a communication manner, so that production managers or maintainers can check the production real-time information. However, the information such as production data viewed in this way is not exactly the same as the actual information, such as: 1. the data communication is delayed, the delay time is related to the data communication speed and the data volume, sometimes the delay is more than 10 seconds, and the timeliness of information transmission is seriously influenced; 2. the two process flow pictures are different, the process flow diagram on the SIS is designed independently and is not completely the same as the process flow diagram displayed on a DCS or PLC display on the production site; data on the SIS is not identical to data in the DCS or the PLC, the data in the DCS or the PLC needs to be converted when being sent to the SIS, namely, an analog quantity is converted into a digital quantity, and errors sometimes occur in the conversion process. Therefore, the data and information displayed by the SIS system are not exactly the same as those displayed on the display of the production site, and there is a limitation in viewing the real-time information of production through the SIS system.
Disclosure of Invention
The video monitoring system and the method can provide real-time production data and information for personnel far away from a display of a control room in time, completely and accurately, improve the convenience of personnel communication during running tests and overhauling and debugging, prevent equipment misoperation or other production accidents caused by unsmooth information communication, and ensure the safety of each process.
According to some embodiments, the following technical scheme is adopted in the disclosure:
a flexible extended video/image monitoring system comprises a signal input device, a signal sharing device, a display, a wired communication network, a commissioning control device and a plurality of wireless access points and mobile terminals, wherein:
the display is arranged at the host of the control system, and the signal input device is connected with the host of the control system, the display and the signal sharing device; the signal sharing device is connected with a wired communication network, the wired communication network is connected with each wireless access point, and the mobile terminal is accessed into the wired communication network through the wireless access points;
the signal sharing device is configured to receive the video/image signal input by the signal input device and send the video/image signal to a wired communication network through a network card;
the commissioning control device is configured to control the wireless access points and commission the corresponding wireless access points according to the received manual control instruction; or the wireless access point is configured to receive the manual control instruction and the control system control instruction at the same time, and when the two instructions appear, the corresponding wireless access point is powered on to be put into operation, so that the video/image signals are shared and transmitted through a wired communication network and the mobile terminal of the corresponding wireless access point acquires the video/image signals.
The manual control instruction refers to an instruction or operation which is issued manually to the wireless access point commissioning control device and used for powering on and commissioning the corresponding wireless access point;
a control system control instruction means an instruction or operation which is issued by the control system to the wireless access point commissioning control device and allows the corresponding wireless access point to be powered on to be commissioned to operate when the condition is met according to a preset condition; and if the wireless access point is not powered on to operate, the wireless access point cannot transmit wireless signals.
By way of further limitation, the signal sharing device is configured with an audio intercom device that is voice-talkable to a user connected to the signal sharing device.
By way of further limitation, an image recording device is disposed on the wired communication network, the image recording device being configured to automatically store images on a display of the control system host shared by the video image sharing devices.
As a further limitation, the signal sharing device pre-defines the number of users connected to the device.
As a further limitation, the control system is a distributed control system, and the host is a human-computer interface station host of the distributed control system.
As a further limitation, the control system is a programmable logic controller, and the host is a programmable logic controller upper computer.
As a further limitation, the wired communication network delivers real-time video images taken by the mobile terminal to the display.
As a further limitation, the power supply of the wireless access point is manually powered on or powered off as required.
As a further limitation, the operation control device is a power switch, and after the power switch is switched on, the corresponding wireless access point is powered on to operate.
As a further limitation, the commissioning control device is a relay or a contactor.
The working method based on the system comprises the following steps:
the mobile terminal sends a request for sharing the display image of the control system host;
the wired communication network sends the request to a corresponding signal sharing device;
after receiving the request, the operator of the signal sharing device performs corresponding operation on the signal sharing device and shares the video/image of the corresponding display to the mobile terminal user if the operator agrees to share the video/image of the corresponding display; otherwise, the mobile terminal user cannot see the video/image of the corresponding display;
the signal sharing device is configured to share the corresponding video/image to the wired communication network at a resolution not lower than the resolution of the corresponding display;
and according to the manual control instruction, the corresponding wireless access point is put into operation to request response.
As a further limitation, putting into a corresponding wireless access point according to a received manual control instruction; or receiving the manual control instruction and the control system control instruction at the same time, and powering on the corresponding wireless access point to be put into operation when the two instructions appear.
Compared with the prior art, the beneficial effect of this disclosure is:
the system can timely, completely and accurately provide real-time production data and information for personnel far away from a control room display, so that debugging personnel can conveniently master production process information in time, and the safety and the working efficiency of debugging work are improved; meanwhile, the accuracy and convenience of communication between the personnel in front of the display and the personnel far away from the display are improved.
The number of the wireless access points is changed, and the number of the users connected with the device is limited in advance by the signal sharing device, so that the expansion can be flexibly realized.
The audio and video intercommunication between a control room and field personnel is realized by adopting a mode of combining wired communication and wireless communication, wired communication is adopted in the control room, and wireless communication is adopted on the field, so that the problems that the interphone or the mobile phone is easily influenced by a control room building and signals are attenuated are solved, and the convenience of debugging work is improved; meanwhile, personnel in the control room can conveniently check the equipment image shot by the field mobile terminal, and the defects that the information is inaccurate, incomplete, untimely and the like possibly existing in the original language communication are overcome.
The method can also record and store the images of the display in real time, is convenient for investigation and analysis after an accident, and is beneficial to the investigation of the accident reason, the taking of precautionary measures and the prevention of the accident from happening again.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a schematic diagram of an extended monitoring system architecture;
wherein, 1, DCS (or PLC) display; 2. video image signal input means; 3. a video image sharing device; 4. a wired communication network; 5. a wireless access point; 6. a wireless access point commissioning control device; 7. a mobile terminal; 8. a desktop computer; 9. an input terminal of a video image signal input device; 10. a video recording apparatus.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The first embodiment is as follows:
a decentralized control system extension monitoring system, comprising: the system comprises a human-computer interface station display of a decentralized control system, a video image signal input device, a video image sharing device, a wired communication network, a wireless access point commissioning control device, a mobile terminal and the like;
the video image signal input device is respectively connected with the host computer of the distributed control system human-computer interface station, the display of the distributed control system human-computer interface station and the video image signal sharing device;
the video image sharing device is also connected with a wired communication network; the wired communication network is also connected with the wireless access point; the wireless access point is also connected with the wireless access point commissioning control device; the mobile terminal accesses a wired communication network through a wireless access point;
the wireless access point commissioning control device is configured to electrify the corresponding wireless access point to be commissioned after receiving the manual control instruction; or receiving a manual control instruction and a distributed control system control instruction at the same time, and powering on the corresponding wireless access point to be put into operation when the two instructions appear;
the manual control instruction refers to an instruction or operation which is issued manually to the wireless access point commissioning control device and used for powering on and commissioning the corresponding wireless access point; the distributed control system control instruction refers to an instruction or operation which is issued by the distributed control system to the wireless access point commissioning control device and allows the corresponding wireless access point to be powered on to be commissioned to operate when the condition is met according to a preset condition; if the wireless access point is not powered on to operate, the wireless access point cannot transmit wireless signals;
the video image sharing device is configured to share the corresponding video image to the wired communication network at a resolution not lower than that of the video image displayed on the corresponding decentralized control system human machine interface station display and at a refresh rate not lower than 2 frames/second;
the video image sharing device is provided with an audio intercom device that can perform voice intercom with a user connected to the video image sharing device.
The step of establishing connection between the wireless access point and the video image sharing device is configured as follows:
step one, a mobile terminal user connected to a wired communication network by a wireless access point sends a request for sharing a display image of a human-computer interface station of a decentralized control system through a mobile terminal;
step two, the wired communication network sends the request to the corresponding video image sharing device;
after receiving the request, if the operator of the video image sharing device agrees to share the images of the corresponding displays, the operator of the video image sharing device performs corresponding operation to share the images of the corresponding displays to the mobile terminal user; otherwise, the mobile terminal user cannot see the image of the corresponding display.
The wired communication network may connect desktop computer users.
The video image sharing apparatus is configured with the following functions: and transmitting the real-time video image shot by a camera of a desktop computer or a mobile terminal connected to a wired communication network to a display of a human-computer interface station of the decentralized control system.
An image recording device is configured on the wired communication network, and the image recording device is configured to automatically store images on the displays of the distributed control system human-computer interface stations shared by the video image sharing devices.
The video image sharing apparatus previously defines the number of users connected to the apparatus.
Example two:
a programmable logic controller extension monitoring system comprises a programmable logic controller upper computer display, a video image signal input device, a video image sharing device, a wired communication network, a wireless access point commissioning control device, a mobile terminal and the like;
the video image signal input device is respectively connected with the upper computer of the programmable logic controller, the upper computer display of the programmable logic controller and the video image signal sharing device;
the video image sharing device is also connected with a wired communication network; the wired communication network is also connected with the wireless access point; the wireless access point is also connected with the wireless access point commissioning control device; the mobile terminal accesses a wired communication network through a wireless access point;
the wireless access point commissioning control device is configured to electrify the corresponding wireless access point to be commissioned after receiving the manual control instruction; or receiving a manual control instruction and a programmable logic controller control instruction at the same time, and powering on the corresponding wireless access point to operate when the two instructions appear;
the manual control instruction refers to an instruction or operation which is issued manually to the wireless access point commissioning control device and used for powering on and commissioning the corresponding wireless access point; the programmable logic controller control instruction refers to an instruction or operation which is issued by the programmable logic controller to the wireless access point commissioning control device and allows the corresponding wireless access point to be powered on to be commissioned to operate when the condition is met according to a preset condition; if the wireless access point is not powered on to operate, the wireless access point cannot transmit wireless signals;
the video image sharing device is configured to share the corresponding video image to the wired communication network at a resolution not lower than that of the video image of the upper computer display of the corresponding programmable logic controller and at a refresh rate not lower than 2 frames/second;
the video image sharing device is provided with an audio intercom device that can perform voice intercom with a user connected to the video image sharing device.
The step of establishing connection between the wireless access point and the video image sharing device is configured as follows:
step one, a mobile terminal user connected to a wired communication network through a wireless access point sends a request for sharing an image of a display of an upper computer of a programmable logic controller through a mobile terminal;
step two, the wired communication network sends the request to the corresponding video image sharing device;
after receiving the request, if the operator of the video image sharing device agrees to share the images of the corresponding displays, the operator of the video image sharing device performs corresponding operation to share the images of the corresponding displays to the mobile terminal user; otherwise, the mobile terminal user cannot see the image of the corresponding display.
Example three:
in the embodiment, as shown in fig. 1, a video image signal input device 2 can be configured as a VGA one-input two-output video signal extension device, wherein an input end 9 of the video image signal input device is connected with a DCS human-machine interface station (or a host computer of a PLC upper computer), and two output ends are respectively connected with a display 1 of the DCS human-machine interface station (or the host computer of the PLC) and a video image signal sharing device 3. The video image sharing apparatus 3 is also connected to a wired communication network 4. The wired communication network 4 is also connected to a wireless access point 5, a desktop computer 8, and a video recording device 10. The mobile terminal 7 can be connected to the wired communication network 4 through the wireless access point 5 when it is located within the effective communication space of the wireless access point 5.
The wireless access point 5 may be configured as a wireless router. Of course, the router should be configured at industrial level to meet the requirements of severe environmental conditions such as high temperature in the field.
The wireless access point commissioning control device 6 is used to control the power supply of the wireless access point 5. For the wireless access point installed outdoors, the wireless access point can be configured as a manual power switch, or the on-off of a power supply is controlled through a relay (contactor) contact, when the wireless access point needs to operate, the power switch of the wireless access point is manually closed, or the relay (contactor) contact is controlled to be closed to supply power to the wireless access point. For the wireless access point installed in the electronic equipment room, because the wireless equipment with higher power is not allowed to be used during the normal operation of the equipment, the power transmission of the wireless access point needs to be judged by control software of a DCS or a PLC besides manually switching on a power switch, when the equipment is stopped and the wireless access point is allowed to be used between the electronic equipment room, the DCS or the PLC controls the corresponding relay or contactor to be connected, and the wireless access point can be electrically put into operation.
The video image sharing apparatus 3 is provided with an audio input device (e.g., a microphone), an audio output device (e.g., a speaker), a power switch, a remote call status lamp, a sharing-permitted image confirmation key, and the like.
The video image sharing device 3, the mobile terminal 7 and the desktop computer 8 are all provided with network communication and audio-video intercommunication software. Both the mobile terminal 7 and the desktop computer 8 can send out an audio/video intercom request to the video image sharing device 3. When a power switch of the video image sharing device 3 is closed and the equipment is in a power-on running state, when an audio and video talkback request is received, a distant calling state lamp flickers from darkness or an audio output device (loudspeaker) sends out a prompt tone, nearby people hear or see the information, like an idea audio and video talkback, press an image sharing confirmation key to establish audio and video talkback between the two parties, an image signal shared by the video image sharing device 3 can be seen on a screen of the mobile terminal 7 or the desktop computer 8, and meanwhile, the two parties can carry out voice talkback.
In addition, the video image sharing device 3 can also be configured to push the real-time image shot by the camera of the mobile terminal 7 or the desktop computer 8 to the display of the DCS human interface station (or the PLC upper computer) as required. The video sharing device 3 is provided with a video receiving and outputting device and a video signal two-in one-out switching device. The specific scheme is as follows: in the video image sharing device 3, video image receiving and processing software is configured, and the images shot by the camera of the mobile terminal 7 or the desktop computer 8 are sent to the video signal output device after being received and processed, and are sent to the input end of the video signal two-in one-out switching device in a VGA (video graphics array), DVI (digital visual interface) or other modes; a video signal line of a display 1 of a DCS (distributed control system) man-machine interface station (or a PLC upper computer) is firstly connected to the input end of a video signal two-in one-out switching device; the output end of the two-in one-out switching device is connected with the video signal input end of a DCS (distributed control system) man-machine interface station (or PLC upper computer) display 1. If a person near the video sharing device 3 needs to check the real-time video image shot by the camera of the mobile terminal 7 or the desktop computer 8, the two-in one-out switching device can be switched to the corresponding input end.
Further, a video recording device 10 is disposed on the wired communication network 4, and the video recording device 10 can automatically store an image on the DCS (or PLC) display 1 shared by the video image sharing devices. This is achieved by the video sharing apparatus 3 being powered on and the video recording apparatus 10 automatically connecting to the video sharing apparatus 3 and storing the shared video signal without manual confirmation. When the stored image needs to be viewed, the recording device 10 can be connected through the mobile terminal 7 or the desktop computer 8 to replay the stored video recording.
In addition, the desktop computer 8 or the mobile terminal 7 connected to the wired communication network 4 is provided with dedicated application management software and authorization, and a connection with the video image sharing apparatus can be established only by the application management software and authorization. The dedicated application management software is the dedicated software written for establishing communication with the wired communication network 4, and is not the network camera connection software commonly used for mobile phones or mobile computers. Meanwhile, when the mobile terminal 7 or the desktop computer 8 logs in the application software, a user name and a password (or fingerprints, facial identification information, and the like) which are registered in advance and pass the verification need to be provided; when a video signal sharing is requested from the video image sharing apparatus after the connection with the video wired communication network 4 is established, another connection request password different from the aforementioned application software login password needs to be provided to establish the connection with the video image sharing apparatus.
The video image sharing apparatus 3 may also pre-define the number of users connected to the apparatus, i.e. to prevent the network load on the apparatus from being too high due to too many users viewing the shared image at the same time, may be pre-set to allow only a certain number of users to connect at the same time, and the specific setting may be implemented by communication management software and application software installed in the apparatus.
The wired communication network 4 is configured to pre-define the number of users of desktop computers 8 or mobile terminals 7 connected to the network. The implementation scheme is as follows: the maximum number of connected terminals is set by a network switch, connection of terminals which are not permitted is restricted by a MAC (Media Access Control) address, and the like.
It should be noted that the wireless access point in the above embodiments is not the same as a long-term continuous operation mode of a civil wireless access point, because the wireless access point in the present disclosure is only used when a maintenance and debugging person uses a mobile terminal near the wireless access point to perform corresponding work, and does not need long-term continuous power-on operation, therefore, a power supply of the wireless access point should be manually powered on or powered off as needed, the wireless access point commissioning control device may be a power switch, and after the power switch is manually switched on, the corresponding wireless access point is powered on to operate, that is, manual control of the wireless access point is completed; it may also be a power supply loop that uses the contacts of a relay or contactor to turn on/off the power supply to the wireless access point. In the other situation, a wireless access point is arranged in an electronic equipment room of a production workshop for overhauling and debugging, when a generator set normally operates, the electronic equipment room is forbidden to use wireless mobile communication equipment with higher power, and the wireless access point cannot be used; the manual control can be a power switch, the DCS (or PLC) control can be a group of control logic programs and a relay loop, when the DCS (or PLC) detects that the unit is in normal operation and a wireless mobile communication device with higher power cannot be used between electronic devices, the control logic programs send instructions to disconnect corresponding relay contacts, the contacts are connected in series on the corresponding wireless access point power loop, and at the moment, even if the power switch of the wireless access point is manually switched on, the wireless access point still cannot be powered on to operate and cannot emit a radio signal.
A mobile terminal user connected to a wired communication network by a wireless access point, making a request for sharing a certain DCS (or PLC) display image through a mobile terminal; the wired communication network sends the request to the corresponding video image sharing device, and after receiving the request, if the operator of the video image sharing device agrees to share the image of the corresponding display, the operator performs corresponding operation on the video image sharing device and shares the image of the corresponding display to the mobile terminal user; otherwise, the mobile terminal user cannot see the image of the corresponding display.
It should be noted that, a user in front of the DCS (or PLC) display has the right to approve or reject the request of the mobile terminal user to share the display image, because the display is used as a device for controlling the operating personnel in the control room to monitor the operating condition of the process system, and if the operating personnel need to check that the image of the display is not the same as the image that the mobile terminal user wants to see, the requirement of the operating personnel should be satisfied preferentially; meanwhile, in emergency, the operator can take the request of the on-site debugging personnel in time, and the picture to be seen by the on-site debugging personnel can not be displayed on the corresponding display in a matching way. Therefore, in the present disclosure, the sharing decision of the display image is set to the person in front of the display. In addition, due to industry-related regulations and safety considerations, a mobile terminal user cannot remotely change the screen on the DCS (or PLC) display, and only can perform screen switching in coordination with personnel in front of the DCS (or PLC) display.
The video image sharing device is configured to share the corresponding video image to the wired communication network at a resolution not lower than that of the video image of the corresponding DCS (or PLC) display at a refresh rate not lower than 2 frames/second.
The video image sharing apparatus is also provided with the following functions: and projecting a real-time video image shot by a camera of the mobile terminal connected to the wired communication network to a DCS (or PLC) display.
It should be noted that the video image content displayed by the DCS (or PLC) display is mainly a process diagram, including temperature, pressure or other parameter display, and the refresh rate of data is changed once in no less than 1 second; the video image has few dynamic contents which change rapidly, so when the video image sharing device shares the images to a mobile terminal user, the resolution ratio is not lower than the resolution ratio of the original image, the definition of the original image can be ensured not to be reduced, and meanwhile, the refreshing rate is not lower than 0.5 second and changes once, namely 2 frames/second can meet the requirement. The lower image frame rate can reduce the load of the communication network bandwidth while satisfying the use requirement.
The video image sharing device is provided with an audio intercom device that can perform voice intercom with a user connected to the video image sharing device. In practical application, the voice intercom device of the video image sharing device is connected to the wireless access point through a wired communication network, so that radio radiation cannot be generated indoors, and the safe operation of electronic equipment of a DCS (or PLC) system cannot be influenced; meanwhile, the wired communication network transmits the voice talkback signals, so that the voice signal transmission quality can be better ensured compared with the case that a wireless interphone or a mobile phone is adopted to carry out indoor conversation with a production site, the communication distance is increased, and the problem of shielding wireless signals by buildings is avoided.
The wired communication network may also connect desktop computer users. The desktop computer user can be connected with a wireless access point through a wireless network card or connected with a wire communication network through a wire network card, and can also realize the connection with a video image sharing device to check the video image of a DCS (or PLC) display.
The video image sharing device has the main function of sharing the video image of the DCS (or PLC) display to a mobile terminal or a desktop computer user, however, sometimes, personnel in front of the DCS (or PLC) display need to know the situation of a production site, and the mobile terminal user is required to transfer the equipment image shot by the camera to the video image sharing device, and the video image sharing device is used for transmitting the equipment image to the DCS (or PLC) display; or to verify the identity of the mobile terminal user, the mobile terminal user is required to transmit the facial image thereof by using the camera. To realize the function, a video image output interface and a video image signal switching device can be arranged on the video image sharing device, the video image output interface outputs the image shot by the camera sent by the mobile terminal to the video image signal switching device, the image entering the DCS (or PLC) display also enters the video image switching device, and the two images are manually switched according to the requirement to be displayed on the display.
The video recording device can automatically store the images on the DCS (or PLC) display shared by the video image sharing device; through the function, when an accident occurs or needs are needed, images on a DCS (or PLC) display can be played back so as to meet the requirements of accident analysis and the like.
The video image sharing device pre-limits the number of users connected with the device, and avoids the situation that the processing capacity of the device is exceeded due to the fact that too many users are connected at the same time, so that the normal operation of the communication function of the video image sharing device is guaranteed.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A video monitoring system with flexible expansion is characterized in that: including signal input device, signal sharing device, display, wired communication network, commissioning control device and a plurality of wireless access point and mobile terminal, wherein:
the display is arranged at the host of the control system, and the signal input device is connected with the host of the control system, the display and the signal sharing device; the signal sharing device is connected with a wired communication network, the wired communication network is connected with each wireless access point, and the mobile terminal is accessed into the wired communication network through the wireless access points;
the signal sharing device is configured to receive the video/image signal input by the signal input device and send the video/image signal to the wired communication network through the network card, and the signal sharing device also receives a request sent by the wired communication network through the following steps:
step one, a mobile terminal user connected to a wired communication network through a wireless access point sends a request for sharing an image of a display of an upper computer of a programmable logic controller through a mobile terminal;
step two, the wired communication network sends the request to the corresponding video image sharing device;
after receiving the request, if the operator of the video image sharing device agrees to share the images of the corresponding displays, the operator of the video image sharing device performs corresponding operation to share the images of the corresponding displays to the mobile terminal user; otherwise, the mobile terminal user cannot see the image of the corresponding display;
the commissioning control device is configured to control the wireless access points and commission the corresponding wireless access points according to the received manual control instruction; or the wireless access point is configured to receive the manual control instruction and the control system control instruction at the same time, and when the two instructions appear, the corresponding wireless access point is powered on to be put into operation, so that the video/image signals are shared and transmitted through a wired communication network and the mobile terminal of the corresponding wireless access point acquires the video/image signals.
2. A flexible extended video surveillance system as claimed in claim 1, characterized by: the signal sharing device is provided with an audio intercom device for carrying out voice intercom with a user connected to the signal sharing device.
3. A flexible extended video surveillance system as claimed in claim 1, characterized by: the wired communication network is configured with an image recording device configured to automatically store images on a control system host display shared by the video image sharing device.
4. A flexible extended video surveillance system as claimed in claim 1, characterized by: the signal sharing device pre-defines the number of users connected to the device.
5. A flexible extended video surveillance system as claimed in claim 1, characterized by: the control system is a distributed control system, and the host is a human-computer interface station host of the distributed control system.
6. A flexible extended video surveillance system as claimed in claim 1, characterized by: the control system is a programmable logic controller, and the host is a programmable logic controller upper computer.
7. A flexible extended video surveillance system as claimed in claim 1, characterized by: and the wired communication network sends the real-time video image shot by the mobile terminal to the display.
8. A flexible extended video surveillance system as claimed in claim 1, characterized by: the operation control device is a power switch, and after the power switch is switched on, the corresponding wireless access point is electrified and operated;
or the operation control device is a relay or a contactor.
9. A method for video surveillance with flexible extensions to the system of any of claims 1-8, characterized by: the method comprises the following steps:
the mobile terminal sends a request for sharing the display image of the control system host;
the wired communication network sends the request to a corresponding signal sharing device;
after receiving the request, the operator of the signal sharing device performs corresponding operation on the signal sharing device and shares the video/image of the corresponding display to the mobile terminal user if the operator agrees to share the video/image of the corresponding display; otherwise, the mobile terminal user cannot see the video/image of the corresponding display;
the signal sharing device is configured to share the corresponding video/image to the wired communication network at a resolution not lower than the resolution of the corresponding display;
and according to the manual control instruction, the corresponding wireless access point is put into operation to request response.
10. The method of claim 9, further comprising: inputting a corresponding wireless access point according to the received manual control instruction; or receiving the manual control instruction and the control system control instruction at the same time, and powering on the corresponding wireless access point to be put into operation when the two instructions appear.
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