Combined monitoring system and method for power plant control equipment and security and protection monitoring equipment

Abstract

The invention relates to a combined monitoring system and method for power plant control equipment and security monitoring equipment. The combined monitoring system of the power plant control equipment and the security and protection monitoring equipment comprises a DCS control network, a DCS control cabinet, an NVR hard disk video recorder and a security and protection integrated network. The DCS control cabinet is provided with a DCS cabinet-to-DCS control network interface and a DCS input and output interface, and the DCS control cabinet is connected with a DCS control network through the DCS cabinet-to-DCS control network interface; the NVR hard disk video recorder is provided with an NVR input and output interface and an NVR-to-security integrated network interface. A DO digital output interface of the DCS control cabinet is connected with a DI digital input interface of the NVR hard disk video recorder through a hard wiring. And a DO digital output interface of the NVR hard disk video recorder is connected with a DI digital input interface of the DCS control cabinet through a hard wiring. According to the combined monitoring system of the power plant control equipment and the security and protection monitoring equipment, the power plant control equipment and the security and protection monitoring equipment can perform combined monitoring, the network security can be improved, and the network reinforcement difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial control equipment and video monitoring equipment, in particular to a combined monitoring system and method for power plant control equipment and security monitoring equipment. BACKGROUND

[0002] The control system of a conventional power plant is responsible for the operation control of generator sets and auxiliary equipment, and samples its own protocol, with high network real-time requirements and being arranged in the production area; the security monitoring equipment is used for monitoring the equipment and roads in the plant area, including the identification of important area leakage and infrared imaging. The two systems use different technical standards and communication protocols, are independent systems, are commonly arranged in the main control room, and the auxiliary control system is used for the operation personnel to confirm the working conditions of the field equipment. At present, some power plants attempt to realize the data transmission of the two monitoring systems by using the MODBUS communication protocol or sinking the industrial television equipment into the DCS (Distributed Control System) network in the production area to realize the linkage of DCS picture monitoring and field video monitoring.

[0003] Both of the above-mentioned methods reduce the network security of the DCS control equipment, increase the difficulty of network reinforcement in the production area, and lack standardized interfaces, and the DCS control equipment and the security monitoring equipment manufacturer need to develop supporting software according to the needs. Because there is a lack of unified standards and effective security protection measures between the power plant control equipment and the security monitoring equipment, the real-time performance, accuracy and security of data interaction are difficult to guarantee, and the actual application effect is not ideal.

[0004] Therefore, it is urgent to develop a technical scheme for combined monitoring of power plant control equipment and security monitoring equipment to improve network security and reduce network reinforcement difficulty. SUMMARY

[0005] The technical problem to be solved by the present application is how to realize the combined monitoring of power plant control equipment and security monitoring equipment, improve network security, and reduce network reinforcement difficulty.

[0006] To solve the above technical problems, according to one aspect of the present application, a power plant control device and security monitoring device combined monitoring system is provided, which comprises: a DCS control network for connecting a power plant control device; a DCS control cabinet, the DCS control cabinet is provided with a DCS cabinet to DCS control network interface and a DCS input and output interface, the DCS control cabinet is connected to the DCS control network through the DCS cabinet to DCS control network interface, wherein the DCS input and output interface comprises a DI digital input interface and a DO digital output interface; a NVR (Network Video Recorder, network video recorder) hard disk recorder, the NVR hard disk recorder is provided with a NVR input and output interface and a NVR to security integrated network interface, wherein the NVR input and output interface comprises a DI digital input interface and a DO digital output interface, wherein the DO digital output interface of the DCS control cabinet and the DI digital input interface of the NVR hard disk recorder are connected through hardwiring; the DO digital output interface of the NVR hard disk recorder and the DI digital input interface of the DCS control cabinet are connected through hardwiring; and a security integrated network for connecting a security control device, wherein the NVR to security integrated network interface of the NVR hard disk recorder is connected to the security integrated network.

[0007] According to an embodiment of the present application, wherein the security integrated network access comprises fire-fighting, video, one-card pass, thermal imaging monitoring, AI intelligent camera, NVR recorder, through security and fire-fighting linkage, using thermal imaging and camera AI recognition technology, realizing temperature early warning of fire-fighting key area, alarm of fire-fighting passage occupation, personnel off-duty detection; and being able to realize fire-fighting alarm video review and access control constant opening through linkage of the security system; adopting LAN communication mode to realize data transmission of DI and DO interface modules in the NVR and the security integrated platform.

[0008] According to an embodiment of the present application, wherein the DCS control cabinet is used for data hardwiring collection and preprocessing, and further processes real-time data, and sends the collected data to a controller for operation and display on a host computer; the controller and a data collection module are arranged in the DCS control cabinet, and the DI card input signal is transmitted to the controller and the DCS control network; and the controller outputs instructions to the DO card according to the requirements of the controller or the DCS control network.

[0009] According to an embodiment of the present application, wherein the DCS control network adopts open, standardized, modularized and serialized design, the host computers and the controllers in the system adopt LAN communication mode to realize information data transmission; and the communication between the controllers in the DCS control cabinet and between the controllers and the host computers.

[0010] According to the embodiment of the present application, the security alarm information is accessed to the DI card of the DCS control cabinet through the alarm output interface of the NVR, the DCS control cabinet is accessed to the DCS control network, and the important security alarm information is displayed and recorded in the DCS system.

[0011] According to the embodiment of the present application, the monitoring picture request of the DCS operator station is output to the security NVR alarm input interface through the DO card of the DCS control cabinet, the picture scene request is accessed to the security monitoring network through the security convergence switch through the Ethernet port of the NVR, and the monitoring picture of the scene is displayed on the large screen after being decoded by the video comprehensive platform server.

[0012] According to the embodiment of the present application, the hardware line connected between the DCS control cabinet and the NVR hard disk video recorder is the KVVP, a polyvinyl chloride insulated polyvinyl chloride sheath woven shielding control cable.

[0013] According to another aspect of the present application, a joint monitoring method of power plant control equipment and security monitoring equipment is provided, which is realized based on the joint monitoring system of the power plant control equipment and the security monitoring equipment as described above, and the joint monitoring method of the power plant control equipment and the security monitoring equipment comprises the following steps of DCS picture linkage security monitoring picture: the host computer of the DCS calls the monitoring picture DCS software to generate the calling code of the corresponding picture, which is sent to the controller in the control cabinet through the DCS cabinet to the DCS control network interface; the DCS controller analyzes the code, changes the DO output card output according to the code corresponding to the DO combination number preset in the database; the DO output card in the DCS cabinet is connected to the NVR video recorder DI output interface through the hardware connection; the NVR queries the DI input signal change, converts the changed DI input into digital quantity combination, and sends it to the security integrated network through the NVR to the security integrated network interface; the security integrated platform queries the database preset scene combination ID according to the digital quantity combination sent by the NVR, and displays the monitoring picture of the ID to the large screen.

[0014] According to the embodiment of the present application, the security monitoring alarm linkage DCS alarm step is included, and the security monitoring alarm linkage DCS alarm comprises the following steps: after the security platform generates an important alarm, the alarm code corresponding to the DO combination number preset in the database is sent to the NVR video recorder through the security platform through the network NVR to the security integrated network interface; the NVR video recorder changes its DO output according to the DO combination requirement;

[0015] The DO output of the NVR recorder is output to the DI input card of the DCS through hardwiring; the DCS inquires the change of the DI input signal, converts the changed DI input into a digital quantity combination, and sends the digital quantity combination to the DCS network through the DCS cabinet and the DCS network interface; the host computer of the DCS inquires the preset alarm combination ID in the database according to the digital quantity combination sent by the NVR, and displays the alarm for the ID on the DCS alarm photon card.

[0016] According to the embodiment of the application, the DCS side multiple DO outputs are output to the multiple DI input signals of the security NVR device, and n digital quantities can generate 2 n scene combinations according to the calculation of the n DO outputs of the DCS side to the n DI input signals of the security NVR device.

[0017] Compared with the prior art, the technical scheme provided by the embodiment of the application can at least achieve the following beneficial effects:

[0018] The joint monitoring system and method of the power plant control device and the security monitoring device according to the application propose a set of linkage scheme using hardwiring, which can realize fast linkage of the security monitoring device under the premise of ensuring the safety of the DCS control device of the power plant control system. The way of hardwiring the output of the control system DCS control device to the security monitoring system of another area realizes linkage of the industrial control scene picture, and the core is to use the DI (Digital Input) and DO (Digital Output) channels between the two systems to exchange signals. This way is completely independent of network transmission, and the scene association instruction is transmitted through the hardware contact signal, which not only meets the requirement of strict isolation of the security area and the monitoring area, but also realizes millisecond-level picture switching response, and solves the scene calling demand when the network transmission is delayed or fails.

[0019] The joint monitoring system of the power plant control device and the security monitoring device according to the application realizes the independence of the two systems of the control device and the security monitoring device through the hard isolation technology, avoids the problem of virus cross-network transmission between the two systems, realizes efficient linkage between the control system and the security monitoring device, and improves the safety protection ability and emergency handling ability of the power plant when the two systems work cooperatively in the case of abnormal situation.

[0020] The power plant control device combined monitoring system and method of the security and protection monitoring device has strong real-time performance, hard-wired signal transmission delay is less than 10 ms, far lower than the typical delay of network transmission, and is suitable for fast response of emergency scenes; compliance is outstanding, signal transmission is based on physical isolation, and completely meets the requirement of "prohibition of direct connection" of each area in the network security; safety is high, there is no network connection between the two, and no network reinforcement device hardware configuration is involved. Compared with the communication connection mode between the two, it is not affected by network attacks and protocol compatibility problems, compared with the camera sinking DCS area network, this mode does not increase the operation burden of the DCS device, and can avoid the influence of security network viruses, congestion and the like on the DCS control; the control system and the security system do not exist hardware customization development work, and the connection between the two can be completed by using the mature hardware of each other. The alarm and picture linkage software development work is completed in the system itself, there is no software interface between the two, the development difficulty is low, and the execution efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, but not limit the present application.

[0022] Figure 1 Fig. 1 is a schematic diagram of a combined monitoring system of a power plant control device and a security and protection monitoring device according to an embodiment of the present application;

[0023] Figure 2 Fig. 2 is a flowchart of DCS picture linkage security and protection monitoring picture according to an embodiment of the present application;

[0024] Figure 3 Fig. 3 is a flowchart of security and protection monitoring alarm linkage DCS alarm according to an embodiment of the present application;

[0025] Figure 4 Fig. 4 is a hard-wired schematic diagram of DCS and security system according to an embodiment of the present application; DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be clearly and completely described below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The following terms or phrases used in the specification and claims of the present patent application are not intended to be limiting, but rather are intended to be illustrative of various aspects of the present application. As used herein, the following terms are intended to have the following meanings.

[0028] Figure 1 is a schematic diagram showing a combined monitoring system of power plant control equipment and security monitoring equipment according to an embodiment of the present application.

[0029] As shown in Figure 1 , the combined monitoring system of power plant control equipment and security monitoring equipment comprises a DCS control network 4, a DCS control cabinet 3, an NVR hard disk recorder 1 and a security integration network 2.

[0030] The DCS control network 4 is used to connect the power plant control equipment; the DCS control cabinet 3, the DCS control cabinet 3 is provided with a DCS cabinet to DCS control network interface 10, a DCS input and output interface 6, the DCS control cabinet 3 is connected with the DCS control network 4 through the DCS cabinet to DCS control network interface 10, wherein the DCS input and output interface 6 comprises a DI digital input interface and a DO digital output interface.

[0031] The NVR hard disk recorder 1, the NVR hard disk recorder 1 is provided with an NVR input and output interface 5, an NVR to security integration network interface 9, wherein the NVR input and output interface 5 comprises a DI digital input interface and a DO digital output interface.

[0032] Figure 4 is a schematic diagram showing a DCS and security system hardwiring according to an embodiment of the present application.

[0033] As shown in Figure 4 , wherein the DO digital output interface of the DCS control cabinet 3 and the DI digital input interface of the NVR hard disk recorder 1 are connected through hardwiring; the DO digital output interface of the NVR hard disk recorder 1 and the DI digital input interface of the DCS control cabinet 3 are connected through hardwiring, the hardwiring comprises a DCS DO output to NVR DI hardwiring 7 and an NVR DO output to DCS hardwiring 8.

[0034] The security integration network 2 is used to connect the security control equipment, wherein the NVR to security integration network interface 9 of the NVR hard disk recorder 1 is connected with the security integration network 2.

[0035] The power plant control device combined monitoring system of the security and protection monitoring device according to the application realizes high-efficiency linkage between the control system and the security and protection monitoring device, and when an abnormal situation occurs, the two systems can work cooperatively, thereby improving the safety protection capability and emergency processing capability of the power plant.

[0036] According to one or some embodiments of the application, the security and protection integrated network 2 access includes fire-fighting, video, one-card pass, thermal imaging monitoring, AI intelligent camera, NVR recorder, and through the security and fire-fighting linkage, the thermal imaging and camera AI recognition technology are used to realize the temperature early warning of the fire-fighting key area, the alarm of the fire-fighting passage occupation, and the personnel off-duty detection, and the security and protection system can be linked to realize the fire-fighting alarm video review and the application of the always-open access control; the local area network communication is adopted to realize the data transmission of the DI and DO interface modules in the NVR and the security and protection integrated platform.

[0037] According to one or some embodiments of the application, the DCS control cabinet 3 is used for data hard-wired collection and preprocessing, and further processes the real-time data, and sends the collected data to the controller for operation and the upper computer display; the controller and the data collection module are arranged in the DCS control cabinet 3, the DI card input signal is accepted and transmitted to the controller and the DCS control network 4, and the output instruction is output to the DO card according to the requirement of the controller or the DCS control network.

[0038] According to one or some embodiments of the application, the DCS control network 4 adopts the open, standardized, modularized and serialized design, the local area network communication is adopted between the upper computers and the controllers in the system to realize the information data transmission, and the communication between the controllers in the DCS control cabinet 3 and between the controller and the upper computer.

[0039] According to one or some embodiments of the application, the security and protection alarm information is accessed to the DI card of the DCS control cabinet 3 through the alarm output interface of the NVR, the DCS control cabinet 3 is accessed to the DCS control network, and the important security and protection alarm information is displayed and historically recorded in the DCS system.

[0040] According to one or some embodiments of the application, the monitoring picture request of the DCS operator station is output to the security and protection NVR alarm input interface through the DO card of the DCS control cabinet 3, the picture scene request is accessed to the security and protection convergence switch through the Ethernet port of the NVR and enters the security and protection monitoring network, and after being decoded by the video comprehensive platform server, the monitoring picture of the scene is displayed on the large screen.

[0041] According to one or more embodiments of the present invention, the hardware cable connecting the DCS control cabinet 3 and the NVR hard disk recorder 1 is a KVVP, PVC insulated, PVC sheathed braided shielded control cable.

[0042] According to another aspect of the present invention, a method for joint monitoring of power plant control equipment and security monitoring equipment is provided, which is implemented based on the joint monitoring system of power plant control equipment and security monitoring equipment as described above, wherein the method for joint monitoring of power plant control equipment and security monitoring equipment includes a step of linking DCS screen with security monitoring screen.

[0043] Figure 2 This is a flowchart illustrating the DCS screen linkage security monitoring screen according to an embodiment of the present invention.

[0044] like Figure 2 As shown, the DCS screen linkage with the security monitoring screen includes the following steps:

[0045] The DCS host computer calls the monitoring screen. The DCS software generates the corresponding screen call code and sends it to the controller in the control cabinet via the DCS control network interface 10.

[0046] The DCS controller parses the code and changes the output of the DO output card according to the DO combination number corresponding to the code preset in the database.

[0047] The DO output card inside the DCS cabinet is connected to the DI output interface of the NVR recorder via hardware wiring.

[0048] The NVR queries the changes in the DI input signal, converts the changed DI input into a digital combination, and sends it to the integrated security network 2 via the NVR's integrated security network interface 9.

[0049] The integrated security platform queries the database for preset scene combination IDs based on the digital data sent by the NVR, and then displays the monitoring footage corresponding to the IDs on the large screen.

[0050] Figure 3 This is a flowchart illustrating the security monitoring alarm linkage DCS alarm process according to an embodiment of the present invention.

[0051] like Figure 3 As shown, the security monitoring alarm linkage with DCS alarm includes the following steps:

[0052] After the security platform generates an important alarm, it sends the alarm code corresponding to the DO combination number preset in the database to the NVR recorder via the security platform and the network NVR to the integrated security network interface 9.

[0053] The NVR recorder changes its DO output according to the DO combination requirements;

[0054] The NVR recorder DO output is outputted to the DI input card of the DCS through hard-wired output;

[0055] The DCS inquires the DI input signal change, converts the changed DI input into digital quantity combination, and sends the digital quantity combination to the DCS network through the DCS cabinet to the DCS network interface 10.

[0056] The host computer of the DCS inquires the database preset alarm combination ID according to the digital quantity combination sent by the NVR, and displays the alarm for the ID on the DCS alarm photon card.

[0057] The joint monitoring system and method of the power plant control device and the security monitoring device according to the application proposes a set of linkage scheme using hard-wired, which can realize fast linkage of the security monitoring device under the premise of ensuring the safety of the DCS control device of the power plant control system. The way of hard-wired output of the control system DCS control device to the security monitoring system of another area is adopted to realize the linkage of the industrial control scene picture, and the core is to use the DI (Digital Input) and DO (Digital Output) channels between the two systems to exchange signals. This way is completely independent of network transmission, and the scene association instruction is transmitted through the hardware contact signal, which not only meets the requirement of strict isolation of the security to the production area and the monitoring area, but also realizes the millisecond-level picture switching response, and solves the scene calling demand when the network transmission is delayed or fails.

[0058] According to one or some embodiments of the application, the DCS side multiple DO outputs to the corresponding multiple DI input signals of the security NVR device, and according to the calculation of the DCS side n DO outputs to the n DI input signals of the security NVR device, n digital quantities can generate 2 n scene combinations.

[0059] According to the calculation of the DCS side 8 DO outputs to the 8 DI input signals of the security NVR device, 8 digital quantities can generate 2 8 =256 scene combinations.

[0060] For example:

[0061]

[0062] According to the calculation of the security NVR device 16 DO outputs to the 16 DI signals of the DCS side, 16 digital quantities can generate 2 16 =65536 alarm information, which can fully meet the device linkage requirement between the two.

[0063] In use, the industrial control system DCS and the security integrated system complete the picture linkage requirement of the security platform and the DCS through the hard-wired switching value, the security side switches the display scene of the security platform according to the external DI input, and the DCS side converts the display picture into the DO output of the control cabinet digital quantity.

[0064] The security platform alarm is output to the DCS through the hard-wired switching value for alarm analysis, the control system performs secondary analysis according to the digital quantity collected by the DI channel, and the important alarm of the security platform is displayed on the DCS. The security system converts the device alarms such as over-temperature, running, dripping, etc. recognized by AI and infrared monitoring of the equipment under its jurisdiction into DO alarm output, the DCS manufacturer monitors the DO output of the security integrated platform, converts it into DI input, and realizes the corresponding preset alarm photon card display according to the DI digital quantity code.

[0065] Hard-wired interface design. DCS side output: add DI, DO cards and relay output modules in the DCS control cabinet, each key scene corresponds to an independent relay contact combination (normally open contact), the contact capacity is DC24V / 1A, which meets the electrical parameter requirements of the security system input module. Security system side input: deploy a hard disk video recorder NVR that interacts with the DCS signal in front of the safety three-zone security server, and convert the hard-wired signals from the DCS into digital signals (0 / 1 state) recognizable by the security system through the switching value input interface on the NVR.

[0066] Scene mapping rules. Establish a ternary mapping table of "DCS monitoring picture event code-DO output combination number-security scene combination ID", for example:

[0067] The DCS picture "#1 induced fan" monitoring picture should be coded as 00001111, the relays K1-K4 should be disconnected, K5-K8 should be closed, and the associated security picture preset scene "0F" (#1 induced fan related device monitoring picture) should be associated.

[0068] The DCS picture "#1 induced fan" monitoring picture should be coded as 00001111, the relays K1-K4 should be disconnected, K5-K8 should be closed, and the associated security picture preset scene "0F" (#1 induced fan related device monitoring picture) should be associated.

[0069] The mapping table is stored in the security system database and is fixed in the system configuration file, remote modification is prohibited, modification needs to be operated locally in the three zones through physical media, and the paper account is updated synchronously.

[0070] Security alarm to DCS signal transmission process: establish a ternary mapping table of "security alarm event code-DO output combination number-DCS alarm combination ID", for example, as shown in the above table.

[0071] Taking "the security intelligent camera detects the coal feeder powder leakage" as an example, the hard-wired alarm process is as follows:

[0072] The security intelligent camera in the safety three areas recognizes the powder leakage, triggers the event, the video recognition server outputs the instruction through the NRV digital output module of the DCS interface, drives the corresponding relay to be attracted, the normally open contact is closed, and the alarm trigger signal is sent to the DCS.

[0073] The DCS converts the security integrated alarm into a binary digital signal, according to the alarm preset mapping table provided by the security integrated device, immediately pushes the alarm "the security intelligent camera detects the coal feeder powder leakage, please check" on the light card alarm screen, and automatically triggers the picture flicker alarm, and records the related information to the alarm log.

[0074] The power plant control device and the joint monitoring system and method of the security monitoring device according to the present application have strong real-time, the hard-wired signal transmission delay is less than 10ms, which is much lower than the typical delay of network transmission, and is suitable for fast response of emergency scene; the compliance is outstanding, the signal transmission is based on physical isolation, and completely meets the requirement of "prohibition of direct connection" of each area in the network security; the safety is high, there is no network connection between the two, and no network reinforcement equipment hardware configuration is involved. Compared with the communication connection mode between the two, it can not be affected by network attacks and protocol compatibility problems, compared with the camera sinking the DCS area network, this mode does not increase the operation burden of the DCS device, and can avoid the influence of security network viruses, congestion and the like on the DCS control; the universality is strong, the control system and the security system do not exist hardware customization development work, and the connection between the two can be completed by using the mature hardware of each other. The alarm and picture linkage software development work is completed in the system itself, there is no software interface between the two, the development difficulty is low, and the execution efficiency is high.

[0075] The above only describes the exemplary embodiments of the present application, and is not used to limit the protection scope of the present application, and the protection scope of the present application is determined by the appended claims.

Claims

1. A combined monitoring system for power plant control equipment and security monitoring equipment, comprising: DCS control network, used to connect power plant control equipment; The DCS control cabinet is equipped with a DCS cabinet-to-DCS control network interface and a DCS input / output interface. The DCS control cabinet is connected to the DCS control network through the DCS cabinet-to-DCS control network interface. The DCS input / output interface includes a DI digital input interface and a DO digital output interface. NVR (Network Video Recorder) is equipped with NVR input / output interfaces and an NVR-to-security integrated network interface. The NVR input / output interfaces include DI (Digital Input) and DO (Digital Output) interfaces. Wherein, the DO digital output interface of the DCS control cabinet is hardwired to the DI digital input interface of the NVR hard disk recorder; the DO digital output interface of the NVR hard disk recorder is hardwired to the DI digital input interface of the DCS control cabinet; and An integrated security network is used to connect security control equipment, wherein the NVR interface of the NVR hard disk recorder is connected to the integrated security network.

2. The joint monitoring system of power plant control equipment and security monitoring equipment as described in claim 1, wherein, The integrated security network access includes devices such as fire protection systems, video surveillance, access control systems, thermal imaging monitoring, AI smart cameras, and NVR recorders. Through security and fire protection linkage, it utilizes thermal imaging and camera AI recognition technology to achieve temperature warnings for key fire-prone areas, alarms for blocked fire exits, and detection of personnel leaving their posts. It can also link with the security system to achieve fire alarm video verification and access control systems that remain open. It uses a local area network for communication to achieve data transmission between the DI and DO interface modules within the NVR and the integrated security platform.

3. The joint monitoring system of power plant control equipment and security monitoring equipment as described in claim 1, wherein, The DCS control cabinet is used for hard-wired data acquisition and preprocessing, and further processing of real-time data. The acquired data is sent to the controller for calculation and display on the host computer. The DCS control cabinet is equipped with a controller and a data acquisition module, which accepts input signals from the DI card and transmits them to the controller and DCS control network. It outputs instructions to the DO card according to the requirements of the controller or DCS control network.

4. The joint monitoring system of power plant control equipment and security monitoring equipment as described in claim 1, wherein, The DCS control network adopts an open, standardized, modular, and serialized design. The host computers and controllers in the system communicate with each other via a local area network to realize information data transmission; communication between controllers in the DCS control cabinet and between controllers and host computers.

5. The joint monitoring system of power plant control equipment and security monitoring equipment as described in claim 1, wherein, Security alarm information is connected to the DI card of the DCS control cabinet via the alarm output interface of the NVR. The DCS control cabinet is then connected to the DCS control network, enabling the display and historical recording of important security alarm information in the DCS system.

6. The joint monitoring system of power plant control equipment and security monitoring equipment as described in claim 1, wherein, The monitoring screen requests from the DCS operator station are output to the alarm input interface of the security NVR via the DO card in the DCS control cabinet. The scene requests are connected to the security aggregation switch through the NVR's Ethernet port and enter the security monitoring network. After being decoded by the video integration platform server, the monitoring screen of the scene is displayed on the large screen.

7. The joint monitoring system of power plant control equipment and security monitoring equipment as described in claim 1, wherein, The hardware cable connecting the DCS control cabinet and the NVR hard disk recorder is a KVVP, PVC insulated, PVC sheathed braided shielded control cable.

8. A method for joint monitoring of power plant control equipment and security monitoring equipment, implemented based on the joint monitoring system for power plant control equipment and security monitoring equipment as described in any one of claims 1-7, wherein the method for joint monitoring of power plant control equipment and security monitoring equipment includes a step of linking a DCS screen to a security monitoring screen, and the step of linking a DCS screen to a security monitoring screen includes the following steps: The DCS host computer calls the monitoring screen. The DCS software generates the corresponding screen call code and sends it to the controller in the control cabinet via the DCS cabinet interface to the DCS control network interface. The DCS controller parses the code and changes the output of the DO output card according to the DO combination number corresponding to the code preset in the database. The DO output card inside the DCS cabinet is connected to the DI output interface of the NVR recorder via hardware wiring. The NVR queries the changes in the DI input signal, converts the changed DI input into a digital combination, and sends it to the integrated security network via the NVR's interface. The integrated security platform queries the database for preset scene combination IDs based on the digital data sent by the NVR, and then displays the monitoring footage corresponding to the IDs on the large screen.

9. The joint monitoring method of power plant control equipment and security monitoring equipment as described in claim 8, including a security monitoring alarm linkage DCS alarm step, wherein the security monitoring alarm linkage DCS alarm includes the following steps: After the security platform generates an important alarm, it sends the alarm code corresponding to the DO combination number preset in the database to the NVR recorder via the network NVR and the integrated security network interface. The NVR recorder changes its DO output according to the DO combination requirements; The NVR recorder's DO output is hardwired to the DCS's DI input card; The DCS queries the changes in the DI input signal, converts the changed DI input into a digital combination, and sends it to the DCS network via the DCS cabinet interface to the DCS control network. The DCS host computer queries the database for preset alarm combination IDs based on the digital combination sent by the NVR, and displays the alarm corresponding to the ID on the DCS alarm photocell.

10. The joint monitoring method of power plant control equipment and security monitoring equipment as described in claim 8, wherein, Multiple DO outputs from the DCS side correspond to multiple DI input signals from the security NVR device. Based on the calculation of n DO outputs from the DCS side to n DI input signals from the security NVR device, n digital quantities can generate 2... n A combination of scenarios.

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