CN117579673B - Computer monitoring system based on wireless communication network - Google Patents

Computer monitoring system based on wireless communication network Download PDF

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Publication number
CN117579673B
CN117579673B CN202410059411.1A CN202410059411A CN117579673B CN 117579673 B CN117579673 B CN 117579673B CN 202410059411 A CN202410059411 A CN 202410059411A CN 117579673 B CN117579673 B CN 117579673B
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computer
wireless communication
data
equipment
monitoring
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CN117579673A (en
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卢国峰
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Nanjing Tangfeng Mechanical & Electrical Co ltd
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Nanjing Tangfeng Mechanical & Electrical Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B31/00—Predictive alarm systems characterised by extrapolation or other computation using updated historic data
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/12—Detection or prevention of fraud
    • H04W12/121—Wireless intrusion detection systems [WIDS]; Wireless intrusion prevention systems [WIPS]
    • H04W12/122—Counter-measures against attacks; Protection against rogue devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3023—Estimation of noise, e.g. on error signals
    • G10K2210/30231—Sources, e.g. identifying noisy processes or components
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
    • G10K2210/30—Means
    • G10K2210/301—Computational
    • G10K2210/3024—Expert systems, e.g. artificial intelligence
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Acoustics & Sound (AREA)
  • Computing Systems (AREA)
  • Medical Informatics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)

Abstract

The invention discloses a computer monitoring system based on a wireless communication network, which belongs to the technical field of wireless communication networks, and aims to solve the problems of low transmission speed and video frame loss and blocking caused by noise generated when factory building equipment runs to interfere the wireless communication network when monitoring video and equipment data in a complex factory building environment are transmitted to a user computer through the wireless communication network, wherein the scheme is as follows: the method comprises the steps of establishing a path loss model, obtaining a linear relation between transmission rate and path loss in a link of a wireless communication network between a computer and monitoring equipment, capturing noise signals generated when monitoring plant equipment is operated by using wireless signal capturing equipment, denoising the transmission signals by using a wireless communication strategy, extracting effective noise generated when the plant equipment is operated, reducing noise generated when the plant equipment is operated by adjusting and controlling parameters of the plant equipment, reducing noise power and improving transmission efficiency.

Description

Computer monitoring system based on wireless communication network
Technical Field
The invention belongs to the technical field of wireless communication networks, and particularly relates to a computer monitoring system based on a wireless communication network.
Background
As the amount of data transmitted by wireless communication increases, the transmission rate requirement on the wireless communication network also increases, and in the existing wireless communication network, factors interfering with wireless communication transmission include obstacles, external noise and electromagnetic interference, and at present, the conventional processing method increases the network bandwidth, increases the coverage rate of the communication base station, and reduces the transmission distance. However, the influence of obstacles and path loss are not considered to be calculated, the influence of noise generated during the encryption of transmission data and the operation of factory equipment on the transmission of the wireless communication network is not considered, and the noise caused by the factory equipment is not identified and processed.
For example, chinese patent CN115633321B discloses a method and system for monitoring a wireless communication network, where the method includes receiving a monitoring point location containing a regional parameter input by a user, determining and configuring a transit gateway according to the monitoring point location; acquiring regional data acquired by monitoring equipment based on a transit gateway; generating an area monitoring report according to the area data; wherein the region parameters include a region type and a region range; the zone types include an unmanned zone and a manned zone. The invention receives the monitoring point position input by the user and the monitoring equipment at the monitoring point position, classifies the monitoring point position according to the monitoring equipment, determines the transit gateway, implants the identification model at the transit gateway, and carries out identification screening on the regional image to obtain data more worth transmitting; the invention processes the data acquired by the monitoring equipment through the transfer gateway with the identification function, and improves the data transmission efficiency by adopting a star-shaped structure.
For example, chinese patent CN102385618B discloses a method for storing a wireless communication network drive test file, which is used for storing all original information collected by a wireless communication network drive test device, and the generated file is composed of a file header for describing a start position of a data segment and a start position of a new device description segment, a device description segment for describing version information and information of an existing data collection device, a data segment for recording data collected by the device, and a new device description segment for describing information of a newly added device in a test process. The application of the drive test file storage structure of the wireless communication network provided by the invention can bring more abundant test information, stronger expansion capability, more flexible architecture, stronger fault tolerance capability, improved data transmission capability and enhanced data security.
The problems proposed in the background art exist in the above patents: the influence of noise generated by factory equipment on the wireless communication network is not considered, and in order to solve the problems, the application designs a computer monitoring system based on the wireless communication network.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a computer monitoring system based on a wireless communication network, which has comprehensive functions, encrypts data when a high-definition camera and a monitoring unit transmit the data to a computer, provides a wireless communication strategy, utilizes wavelet transformation to denoise noise generated when factory equipment in transmitted signals operates, provides a threshold function, compares denoised noise with a noise type map library, compares frequency values from a two-point, a three-point and a four-point to a y-point, accurately identifies the noise type, reduces the noise generated when the equipment operates by adjusting control equipment, effectively reduces noise power, and improves network transmission rate under the condition of unchanged network bandwidth.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A computer monitoring system based on a wireless communication network, comprising:
the computer module is used for displaying the transmitted monitoring video information in the factory building, monitoring and controlling equipment in the factory building, and storing video data and factory building equipment data;
A wireless communication module: the system is arranged in the plant monitoring equipment and the computer module at the same time and is used for realizing network communication connection and data transmission between the plant monitoring equipment and the computer module;
the PLC module is used for processing and transmitting communication signals between the PLC and the computer and between the PLC and the factory building equipment;
the monitoring module is used for carrying out real-time video monitoring on the working condition of the factory building and monitoring the temperature, current and voltage of the factory building equipment;
And the safety protection module is used for encrypting and protecting the data in the wireless communication transmission and preventing the data from being stolen.
Specifically, the computer module includes:
the computer display screen is used for displaying video data, temperature data and current and voltage data transmitted by the plant monitoring equipment;
The early warning unit is used for making early warning prompt in the computer when the temperature, voltage and current of the factory building equipment exceed the temperature interval, the safety current and the safety voltage in the parameters of the factory building equipment;
the control unit is used for carrying out parameter adjustment control on equipment of the factory building;
and the database server is used for storing the video, the equipment data information and the data backup.
Specifically, the wire communication module includes:
And the wireless communication unit is used for establishing a wireless communication network channel and realizing the data transmission among the computer module, the high-definition camera and the monitoring unit.
Specifically, the PLC module includes:
The power supply is used for converting alternating current into direct current and providing direct current for the CPU unit, the signal unit, the communication unit and the storage unit;
the CPU unit is used for collecting signals input from the programmer and the upper computer, executing a keyed-in program, outputting data in real time and checking the states of the power supply, the memory, the I/O and the timer;
the storage unit is used for storing system software, application software and input and output data;
the signal unit is used for receiving the signal input by the computer module and outputting the signal processed by the CPU unit;
and the communication unit is used for interactive communication with the computer module, the video monitoring equipment and the factory building equipment.
Specifically, the monitoring module includes:
the high-definition camera is used for shooting high-definition videos in the factory building in real time;
The temperature sensor is used for measuring the real-time temperature of the factory building equipment during operation;
the voltage sensor is used for monitoring real-time voltage of the factory building equipment during operation;
The current sensor is used for monitoring real-time current of the factory building equipment during operation;
And the monitoring control unit is used for collecting real-time data of the temperature sensor, the voltage sensor, the current sensor and the high-definition camera, transmitting the real-time data to the computer through the wireless communication module, receiving signals processed by the PLC module output by the computer module, and controlling factory building equipment.
Specifically, the safety protection module includes:
the security encryption unit is used for encrypting transmission data between the monitoring module and the computer and adopts an AES symmetric encryption algorithm;
the safety protection unit is used for resisting external network invasion and preventing data from being stolen.
Specifically, the step of implementing computer monitoring by the computer monitoring system based on the wireless communication network includes:
s1: the basic framework of the computer monitoring system of the wireless communication network is established, and the computer monitoring system is constructed by taking the computer module, the wireless communication module, the PLC module, the monitoring module and the safety protection module as cores, so that the computer monitoring system can normally operate;
s2: collecting real-time data of the temperature sensor, the voltage sensor, the current sensor and the high-definition camera, encrypting the real-time data through the security encryption unit, converting the data into ciphertext, transmitting the ciphertext and the secret key simultaneously, and decrypting by using inverse operation after receiving the ciphertext and the secret key;
S3: the encrypted data is transmitted through a wireless communication network, the data is transmitted to a computer module by utilizing a wireless communication strategy, and the acquired data is displayed in a display screen of the computer module after decryption;
S4: detecting the temperature, voltage and current of the factory building equipment in a normal operation state in a time interval, comparing the temperature interval, safety voltage and safety current in factory building equipment parameters with temperature, voltage and current data monitored in real time, storing the data into a database server when the safety temperature, voltage and current are not exceeded, storing the data into the database server when the safety temperature, voltage and current are exceeded as reference data of normal operation, and making an early warning prompt through an early warning unit;
S5: and the operator adjusts and controls equipment parameters through the control unit according to the early warning prompt, the parameters are transmitted to the PLC module, and the PLC module processes and converts the received signals and outputs the signals to the equipment so that the equipment reaches a normal running state.
Specifically, the step S3 includes a wireless communication policy, where the wireless communication policy includes the following specific steps:
S301: in the wireless communication network between the high-definition camera and the computer module, a path loss model is established, and the expression is:
Wherein F j represents the transmission power of the high-definition camera, F i represents the receiving power of the computer, p represents the distance between the high-definition camera and the computer, and alpha represents the path loss factor;
S302: setting the wireless communication network to have L concurrent links, setting the transmission power to be F (U x) when the node faces to the link x, setting the transmission distance between the high-definition camera node U x and the computer node P x to be P (U x,Px), using distributed resource scheduling, setting the noise power of the high-definition camera node U x and the computer node P x to be N, and adopting the calculation formula as follows:
Wherein k w represents network noise power, k s represents factory plant noise power, y represents one of the L links, λ represents transmission distance adjustment coefficient,
According to shannon's theorem, calculating the link x transmission rate C between the high-definition camera and the computer, wherein the calculation formula is as follows:
Wherein B is the network bandwidth;
s303: capturing noise when the plant equipment operates by utilizing the wireless signal capturing equipment, setting the captured signal as S, carrying out wavelet decomposition calculation on the signal S by using wavelet transformation to obtain wavelet coefficients w s, carrying out threshold quantification processing on the wavelet coefficients under each decomposition scale by selecting a threshold lambda, and utilizing threshold function processing, wherein a threshold function formula is as follows:
Wherein represents wavelet coefficients processed according to a threshold function, sign () represents a sign function, i·| represents an absolute value sign, β is a threshold function adjustment factor, β is 0 or more and 1 or less, λ is a wavelet coefficient threshold, and a global fixed threshold is selected for the threshold λ, where the formula is:
Where sigma is the standard deviation of the noise,
Wherein w 1 is the intermediate value of each coefficient value of the first layer wavelet decomposition, and N represents the sample length of the noise signal;
S304: according to wavelet coefficients after threshold quantization of each layer after wavelet decomposition, reconstructing the wavelet coefficients by utilizing wavelet inverse transformation to obtain noise signals S ', S ' after denoising, selecting interval section comparison of the same period from S ' and a device noise class map library, setting interval length as Y, comparing frequency values corresponding to two-point, three-point and four-point to Y-point, and representing the interval section comparison as S ' m and S t, wherein S ' m represents the noise signal point frequency value, m epsilon (2, Y), S t represents the map signal point frequency value of the device noise class map library, t epsilon (2, Y), and the comparison formula is as follows:
Fb＝{(S'2!＝S2)∧(S3'!＝S3)∧…∧(S'y!＝Sy)}
Wherein F b judges whether the corresponding frequency values from the two points S' m and S t, the three points and the four points to the y points are equal, the two points represent the points for equally dividing the period interval into two sections, the three points represent the points for equally dividing the period interval into three sections, the y points represent the points for equally dividing the period interval into y sections, and the two points are equal to each other-! And the =.1 is output when the two values are equal, 0 is output when the two values are not equal, and the symbol is output when the two values are equal, wherein the symbol is output when the two values are 1, the noise signal patterns are the same, the type of the noise signal S' is identified, the parameters of the control equipment are regulated according to the type of the noise, the noise of the plant equipment in operation is reduced, and the noise power of the plant equipment is reduced.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention optimizes and improves the structure, operation steps and flow of the existing computer monitoring system based on the wireless communication network, and the system has the advantages of simple flow, low investment and operation cost and low production and working cost, and improves the monitoring and controlling effect on the basis of the original monitoring system.
2. The invention provides a wireless communication strategy, which captures signals generated when plant equipment runs, denoising the noise generated by the plant equipment by utilizing wavelet transformation and a proposed threshold function, comparing the denoised noise with an equipment noise type map library, comparing frequency values from a two-point, a three-point and a four-point to a y-point, accurately identifying the noise type, reducing the noise generated by the equipment running by adjusting and controlling the equipment, reducing the noise power, establishing a path loss model, increasing the signal to noise ratio when the noise power is reduced, and effectively improving the transmission rate of a wireless communication channel.
Drawings
FIG. 1 is a schematic diagram of a monitoring flow of a computer monitoring system based on a wireless communication network according to the present invention;
fig. 2 is a schematic diagram of a wireless communication strategy flow of a computer monitoring system based on a wireless communication network according to the present invention.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments.
Referring to fig. 1 and 2, an embodiment of the present invention is provided: a computer monitoring system based on a wireless communication network comprises a computer module, a monitoring module and a control module, wherein the computer module is used for displaying the transmitted monitoring video information in a factory building, monitoring and controlling equipment in the factory building, and storing video data and factory building equipment data;
The wireless communication module is simultaneously arranged in the plant monitoring equipment and the computer module and is used for realizing network communication connection and data transmission between the plant monitoring equipment and the computer module;
the PLC module is used for processing and transmitting communication signals between the PLC and the computer and between the PLC and the factory building equipment;
the monitoring module is used for carrying out real-time video monitoring on the working condition of the factory building and monitoring the temperature, current and voltage of the factory building equipment;
And the safety protection module is used for encrypting and protecting the data in the wireless communication transmission and preventing the data from being stolen.
The computer module includes:
the computer display screen is used for displaying video data, temperature data and current and voltage data transmitted by the plant monitoring equipment;
The early warning unit is used for making early warning prompt in the computer when the temperature, voltage and current of the factory building equipment exceed the temperature interval, the safety current and the safety voltage in the parameters of the factory building equipment;
the control unit is used for carrying out parameter adjustment control on equipment of the factory building;
and the database server is used for storing the video, the factory building equipment data information and the data backup.
The wireless communication module includes:
And the wireless communication unit is used for establishing a wireless communication network channel and realizing the data transmission among the computer module, the high-definition camera and the monitoring unit.
The PLC module includes:
The power supply is used for converting alternating current into direct current and providing direct current for the CPU unit, the signal unit, the communication unit and the storage unit;
the CPU unit is used for collecting signals input from the programmer and the upper computer, executing a keyed-in program, outputting data in real time and checking the states of the power supply, the memory, the I/O and the timer;
the storage unit is used for storing system software, application software and input and output data;
the signal unit is used for receiving the signal input by the computer module and outputting the signal processed by the CPU unit;
and the communication unit is used for interactive communication with the computer module, the video monitoring equipment and the factory building equipment.
The monitoring module includes:
the high-definition camera is used for shooting high-definition videos in the factory building in real time;
The temperature sensor is used for measuring the real-time temperature of the factory building equipment during operation;
the voltage sensor is used for monitoring real-time voltage of the factory building equipment during operation;
The current sensor is used for monitoring real-time current of the factory building equipment during operation;
And the monitoring control unit is used for collecting real-time data of the temperature sensor, the voltage sensor, the current sensor and the high-definition camera, transmitting the real-time data to the computer through the wireless communication module, receiving signals processed by the PLC module output by the computer module, and controlling factory building equipment.
The safety protection module includes:
the security encryption unit is used for encrypting transmission data between the monitoring module and the computer and adopts an AES symmetric encryption algorithm;
the safety protection unit is used for resisting external network invasion and preventing data from being stolen.
Referring to fig. 1 and 2, an embodiment of the present invention is provided: a computer monitoring system based on a wireless communication network, comprising the steps of the computer monitoring system based on the wireless communication network to realize computer monitoring, comprising:
s1: the basic framework of the computer monitoring system of the wireless communication network is established, and the computer monitoring system is constructed by taking the computer module, the wireless communication module, the PLC module, the monitoring module and the safety protection module as cores, so that the computer monitoring system can normally operate;
s2: collecting real-time data of the temperature sensor, the voltage sensor, the current sensor and the high-definition camera, encrypting the real-time data through the security encryption unit, converting the data into ciphertext, transmitting the ciphertext and the secret key simultaneously, and decrypting by using inverse operation after receiving the ciphertext and the secret key;
S3: the encrypted data is transmitted through a wireless communication network, the data is transmitted to a computer module by utilizing a wireless communication strategy, and the acquired data is displayed in a display screen of the computer module after decryption;
S4: detecting the temperature, voltage and current of the factory building equipment in a normal operation state in a time interval, comparing the temperature interval, safety voltage and safety current in factory building equipment parameters with temperature, voltage and current data monitored in real time, storing the data into a database server when the safety temperature, voltage and current are not exceeded, storing the data into the database server when the safety temperature, voltage and current are exceeded as reference data of normal operation, and making an early warning prompt through an early warning unit;
S5: and the operator adjusts and controls equipment parameters through the control unit according to the early warning prompt, the parameters are transmitted to the PLC module, and the PLC module processes and converts the received signals and outputs the signals to the equipment so that the equipment reaches a normal running state.
Referring to fig. 1 and 2, an embodiment of the present invention is provided: a computer monitoring system based on a wireless communication network, the step S3 comprising a wireless communication policy, the wireless communication policy step comprising:
S301: in the wireless communication network between the high-definition camera and the computer module, a path loss model is established, and the expression is:
Wherein F j represents the transmission power of the high-definition camera, F i represents the receiving power of the computer, p represents the distance between the high-definition camera and the computer, and alpha represents the path loss factor;
S302: setting the wireless communication network to have L concurrent links, setting the transmission power to be F (U x) when the node faces to the link x, setting the transmission distance between the high-definition camera node U x and the computer node P x to be P (U x,Px), using distributed resource scheduling, setting the noise power of the high-definition camera node U x and the computer node P x to be N, and adopting the calculation formula as follows:
Wherein k w represents network noise power, k s represents factory plant noise power, y represents one of the L links, λ represents transmission distance adjustment coefficient,
According to shannon's theorem, calculating the link x transmission rate C between the high-definition camera and the computer, wherein the calculation formula is as follows:
Wherein B is the network bandwidth;
s303: capturing noise when the plant equipment operates by utilizing the wireless signal capturing equipment, setting the captured signal as S, carrying out wavelet decomposition calculation on the signal S by using wavelet transformation to obtain wavelet coefficients w s, carrying out threshold quantification processing on the wavelet coefficients under each decomposition scale by selecting a threshold lambda, and utilizing threshold function processing, wherein a threshold function formula is as follows:
Wherein represents wavelet coefficients processed according to a threshold function, sign () represents a sign function, i·| represents an absolute value sign, β is a threshold function adjustment factor, β is 0 or more and 1 or less, λ is a wavelet coefficient threshold, and a global fixed threshold is selected for the threshold λ, where the formula is:
Where sigma is the standard deviation of the noise,
Wherein w 1 is the intermediate value of each coefficient value of the first layer wavelet decomposition, and N represents the sample length of the noise signal;
S304: according to wavelet coefficients after threshold quantization of each layer after wavelet decomposition, reconstructing the wavelet coefficients by utilizing wavelet inverse transformation to obtain noise signals S ', S ' after denoising, selecting interval section comparison of the same period from S ' and a device noise class map library, setting interval length as Y, comparing frequency values corresponding to two-point, three-point and four-point to Y-point, and representing the interval section comparison as S ' m and S t, wherein S ' m represents the noise signal point frequency value, m epsilon (2, Y), S t represents the map signal point frequency value of the device noise class map library, t epsilon (2, Y), and the comparison formula is as follows:
Fb＝{(S'2!＝S2)∧(S3'!＝S3)∧…∧(S'y!＝Sy)}
Wherein F b judges whether the corresponding frequency values from the two points S' m and S t, the three points and the four points to the y points are equal, the two points represent the points for equally dividing the period interval into two sections, the three points represent the points for equally dividing the period interval into three sections, the y points represent the points for equally dividing the period interval into y sections, and the two points are equal to each other-! And the =.1 is output when the two values are equal, 0 is output when the two values are not equal, and the symbol is output when the two values are equal, wherein the symbol is output when the two values are 1, the noise signal patterns are the same, the type of the noise signal S' is identified, the parameters of the control equipment are regulated according to the type of the noise, the noise of the plant equipment in operation is reduced, and the noise power of the plant equipment is reduced.
It will be appreciated by persons skilled in the art that the foregoing description is a preferred embodiment of the invention, and is not intended to limit the invention, but rather to limit the invention to the specific embodiments described, and that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for elements thereof, for the purposes of those skilled in the art. Modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (5)

1. A computer monitoring system based on a wireless communication network, comprising: the computer module is used for displaying the transmitted monitoring video information in the factory building, monitoring and controlling equipment in the factory building, and storing video data and factory building equipment data;
A wireless communication module: the system is arranged in the plant monitoring equipment and the computer module at the same time and is used for realizing network communication connection and data transmission between the plant monitoring equipment and the computer module;
the PLC module is used for processing and transmitting communication signals between the PLC and the computer and between the PLC and the factory building equipment;
the monitoring module is used for carrying out real-time video monitoring on the working condition of the factory building and monitoring the temperature, current and voltage of the factory building equipment;
the safety protection module is used for encrypting and protecting data in wireless communication transmission and preventing the data from being stolen;
the safety protection module further comprises:
The safety encryption unit is used for encrypting the transmission data between the monitoring module and the computer;
the safety protection unit is used for resisting external network invasion and preventing data from being stolen;
the monitoring module comprises a computer monitoring strategy, and the steps of the computer monitoring strategy comprise:
s1: the basic framework of the computer monitoring system of the wireless communication network is established, and the computer monitoring system is constructed by taking the computer module, the wireless communication module, the PLC module, the monitoring module and the safety protection module as cores, so that the computer monitoring system can normally operate;
s2: collecting real-time data of the temperature sensor, the voltage sensor, the current sensor and the high-definition camera, encrypting the real-time data through the security encryption unit, converting the data into ciphertext, transmitting the ciphertext and the secret key simultaneously, and decrypting by using inverse operation after receiving the ciphertext and the secret key;
S3: the encrypted data is transmitted through a wireless communication network, the data is transmitted to a computer module by utilizing a wireless communication strategy, and the acquired data is displayed in a display screen of the computer module after decryption;
S4: detecting the temperature, voltage and current of the factory building equipment in a normal operation state in a time interval, comparing the temperature interval, safety voltage and safety current in factory building equipment parameters with temperature, voltage and current data monitored in real time, storing the data into a database server when the safety temperature, voltage and current are not exceeded, storing the data into the database server when the safety temperature, voltage and current are exceeded as reference data of normal operation, and making an early warning prompt through an early warning unit;
s5: the operator adjusts and controls equipment parameters through the control unit according to the early warning prompt, the parameters are transmitted to the PLC module, and the PLC module processes and converts the received signals and outputs the signals to the equipment so that the equipment can reach a normal operation state;
The step S3 comprises a wireless communication strategy, and the wireless communication strategy comprises the following specific steps:
S301: in the wireless communication network between the high-definition camera and the computer module, a path loss model is established, and the expression is:
Wherein F j represents the transmission power of the high-definition camera, F i represents the receiving power of the computer, p represents the distance between the high-definition camera and the computer, and alpha represents the path loss factor;
S302: setting the wireless communication network to have L concurrent links, setting the transmission power to be F (U x) when the node faces to the link x, setting the transmission distance between the high-definition camera node U x and the computer node P x to be P (U x,Px), using distributed resource scheduling, setting the noise power of the high-definition camera node U x and the computer node P x to be N, and adopting the calculation formula as follows:
Wherein k w represents network noise power, k s represents factory plant noise power, y represents one of the L links, λ represents transmission distance adjustment coefficient,
According to shannon's theorem, calculating the link x transmission rate C between the high-definition camera and the computer, wherein the calculation formula is as follows:
Wherein B is the network bandwidth;
s303: capturing noise when the plant equipment operates by utilizing the wireless signal capturing equipment, setting the captured signal as S, carrying out wavelet decomposition calculation on the signal S by using wavelet transformation to obtain wavelet coefficients w s, carrying out threshold quantification processing on the wavelet coefficients under each decomposition scale by selecting a threshold lambda, and utilizing threshold function processing, wherein a threshold function formula is as follows:
Wherein denotes wavelet coefficients processed according to a threshold function, sign () denotes a sign function, i·|denotes an absolute value sign, β is a threshold function adjustment factor, and 0.ltoreq.β.ltoreq.1, λ is a wavelet coefficient threshold,
The threshold lambda is selected as a global fixed threshold, and the formula is:
Where sigma is the standard deviation of the noise,
Wherein w 1 is the intermediate value of each coefficient value of the first layer wavelet decomposition, and N represents the sample length of the noise signal;
S304: according to wavelet coefficients after threshold quantization of each layer after wavelet decomposition, reconstructing the wavelet coefficients by utilizing wavelet inverse transformation to obtain noise signals S ', S ' after denoising, selecting interval section comparison of the same period from S ' and a device noise class map library, setting interval length as Y, comparing frequency values corresponding to two-point, three-point and four-point to Y-point, and representing the interval section comparison as S ' m and S t, wherein S ' m represents the noise signal point frequency value, m epsilon (2, Y), S t represents the map signal point frequency value of the device noise class map library, t epsilon (2, Y), and the comparison formula is as follows:
Fb＝{(S'2!＝S2)∧(S'3!＝S3)∧…∧(S'y!＝Sy)}
wherein F b judges whether the corresponding frequency values from the two points S' m and S t, the three points and the four points to the y points are equal, the two points represent the points for equally dividing the period interval into two sections, the three points represent the points for equally dividing the period interval into three sections, the y points represent the points for equally dividing the period interval into y sections, and the two points are equal to each other-! And the symbol for judging whether the numerical values on two sides are equal or not is output 1 when the numerical values are equal, 0 is output when the numerical values are not equal, the symbol is output as lambda, when the numerical values are output as 1, the noise signal patterns are the same, the type of the noise signal S' is identified, the parameters of the control equipment are regulated according to the type of the noise, and the noise of the factory building equipment in operation is reduced.
2. The wireless communication network-based computer monitoring system of claim 1, wherein the computer module comprises:
the computer display screen is used for displaying video data, temperature data and current and voltage data transmitted by the plant monitoring equipment;
the early warning unit is used for making early warning prompt in the computer when the temperature, voltage and current of the factory building equipment exceed the temperature interval, the safety voltage and the safety current in the parameters of the factory building equipment;
the control unit is used for carrying out parameter adjustment control on equipment of the factory building;
and the database server is used for storing the video, the equipment data information and the data backup.
3. The computer monitoring system based on a wireless communication network of claim 2, wherein the wireless communication module comprises:
And the wireless communication unit is used for establishing a wireless communication network channel and realizing the data transmission among the computer module, the high-definition camera and the monitoring unit.
4. The computer monitor system based on a wireless communication network as set forth in claim 3, wherein the PLC module includes:
The power supply is used for converting alternating current into direct current and providing direct current for the CPU unit, the signal unit, the communication unit and the storage unit;
the CPU unit is used for collecting signals input from the programmer and the upper computer, executing a keyed-in program, outputting data in real time and checking the states of the power supply, the memory, the I/O and the timer;
the storage unit is used for storing system software, application software and input and output data;
the signal unit is used for receiving the signal input by the computer module and outputting the signal processed by the CPU unit;
and the communication unit is used for interactive communication with the computer module, the video monitoring equipment and the factory building equipment.
5. The computer monitor system based on a wireless communication network as set forth in claim 4, wherein the monitor module comprises:
the high-definition camera is used for shooting high-definition videos in the factory building in real time;
The temperature sensor is used for measuring the real-time temperature of the factory building equipment during operation;
the voltage sensor is used for monitoring real-time voltage of the factory building equipment during operation;
The current sensor is used for monitoring real-time current of the factory building equipment during operation;
And the monitoring control unit is used for collecting real-time data of the temperature sensor, the voltage sensor, the current sensor and the high-definition camera, transmitting the real-time data to the computer through the wireless communication module, receiving signals processed by the PLC module output by the computer module, and controlling factory building equipment.
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