CN117193243A - Remote control system of PLC control cabinet - Google Patents
Remote control system of PLC control cabinet Download PDFInfo
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Abstract
The invention discloses a remote control system of a PLC control cabinet, which relates to the field of PLC control cabinets, and the technical scheme is characterized by comprising the following steps: the system comprises a controller, an information acquisition module, a state analysis module, a data storage module, a network communication module and a control precision calibration module; the information acquisition module is used for acquiring basic information corresponding to each component in the PLC control cabinet. A remote control system of a PLC control cabinet can realize a timing automatic calibration function of the control precision of the PLC control cabinet by arranging the control precision calibration module, and response time evaluation values T of all components in the PLC control cabinet are obtained kc Output signal evaluation value W kj Input signal evaluation value Q kj The three are used as specific evaluation parameters to calculate the control precision evaluation coefficient epsilon of the PLC control cabinet, and finally the epsilon is combined with the set control precision evaluation coefficient epsilon 0 Whether the control precision of the PLC control cabinet has deviation or not is determined, and relevant calibration is carried out according to the deviation result.
Description
Technical Field
The invention relates to the technical field of PLC control cabinets, in particular to a remote control system of a PLC control cabinet.
Background
The PLC control cabinet is a programmable control cabinet, and the control cabinet is a complete set of control cabinet, and can realize the control of a motor and a switch. The PLC control cabinet has the protection functions of overload, short circuit, phase failure protection and the like, can be combined according to the actual control scale, can realize the automatic control of a single cabinet, and can also realize that a plurality of cabinets form a distributed control system through an industrial Ethernet or an industrial field bus network; the PLC control cabinet can be suitable for industrial automation control occasions with various sizes and scales. Widely applied to industries such as electric power, metallurgy, chemical industry, papermaking, environmental protection sewage treatment and the like.
At present, after a period of operation of a PLC control cabinet, due to the fact that the use state and related parameters are changed among the devices, a worker is often required to conduct related checking and calibration regulation and control on the control precision of the PLC control cabinet, so that the control precision of the PLC control cabinet is ensured to be in an allowable deviation range, the normal control operation work of the PLC control cabinet is maintained, and through manual checking and calibration, the work load is large, and the calibration precision is difficult to guarantee.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a remote control system of a PLC control cabinet.
In order to achieve the above object, the present invention provides the following technical solutions, including:
the system comprises a controller, an information acquisition module, a state analysis module, a data storage module, a network communication module and a control precision calibration module;
the information acquisition module is used for acquiring basic information corresponding to each component in the PLC control cabinet;
the state analysis module is used for analyzing basic information corresponding to each component in the collected PLC control cabinet and evaluating whether the collected PLC control cabinet is in a normal running state or not;
the network communication module is used for realizing control information transmission between the PLC control cabinet and the controller;
the control precision calibration module is used for regularly regulating and controlling the control precision of the PLC control cabinet and comprises a timing unit, a delay acquisition unit, an input signal acquisition unit, an output signal acquisition unit and a control precision analysis unit;
the timing unit is used for setting a period for calibrating the control precision of the PLC control cabinet; the said extensionThe time acquisition unit is used for acquiring response time evaluation value T of corresponding component of the PLC control cabinet after sending control information kc The method comprises the steps of carrying out a first treatment on the surface of the The input signal acquisition unit is used for acquiring input information of the PLC control cabinet and converting the input information into a corresponding input signal evaluation value Q kj The output signal acquisition unit is used for acquiring the input information of the PLC control cabinet and converting the output information into a corresponding output signal evaluation value W kj The method comprises the steps of carrying out a first treatment on the surface of the Wherein k represents the number corresponding to the component receiving the input information in the PLC control cabinet, k=1, 2, 3..n., c represents a number corresponding to the number of response times, c=1, 2, 3..o, j represents a number of times corresponding to the reception of the input information by the component receiving the input information in the PLC control cabinet, j=1, 2, 3..p;
the control accuracy analysis unit is used for receiving the response time evaluation value T kc Input signal evaluation value Q kj And output signal evaluation value W kj And judging whether deviation exists in control precision of the integrated PLC control cabinet, specifically: by the formulaCalculating a control accuracy evaluation coefficient epsilon, wherein the control accuracy evaluation coefficient Q is corrected by 0 And W is equal to 0 The control precision evaluation coefficient epsilon is judged and set for the set standard input signal evaluation value and standard output signal evaluation value respectively 0 If epsilon>ε 0 If epsilon is less than or equal to epsilon, the control accuracy is considered to have larger deviation, calibration is needed 0 The control accuracy deviation is considered to be within the allowable range, and calibration is not required.
Preferably, the information acquisition module mainly acquires basic information of each switch and each line in the PLC power distribution cabinet, wherein the basic information of the switch specifically includes a switch state, a function, a temperature and control information, and the basic information of the line specifically includes an input port current, an output port current, an input port voltage, an output port voltage, an input port signal intensity, an output port signal intensity, an input port signal frequency, an output port signal frequency and an external image.
Preferably, the state analysis module comprises a data processing unit, a data analysis unit and a cloud database, wherein the data processing unit is used for converting and processing the received basic information of each switch and each line into analysis data types, uploading the analysis data to the data analysis unit, and comparing the acquired analysis data with the set initial standard analysis data by searching the cloud database, determining whether the analysis data is abnormal or not and outputting the analysis result.
Preferably, the specific process of the delay acquisition unit in acquiring response time is as follows: obtain the transmission time of the input signal and marked as T 1 Acquiring output signal generation time and marking as T 2 According to the formulaCalculating response time, wherein lambda 1 And lambda (lambda) 2 The response time evaluates the coefficients.
Preferably, the specific process of the input signal acquisition unit for acquiring the input signals of all the components of the PLC control cabinet is as follows: acquiring all control information in a PLC control cabinet, screening out the control information as input signals, and acquiring the signal strength B of the input signals kj Sum signal frequency C kj Inputting signal evaluation value using formulaWhere η is a weight factor of the input signal.
Preferably, the specific process of the output signal acquisition unit for acquiring the input signals of all the components of the PLC control cabinet is as follows: acquiring all control information in a PLC control cabinet, screening out the control information as output signals, and acquiring the signal strength D of the output signals kj Sum signal frequency E kj Inputting signal evaluation value using formulaWhere ρ is the weight factor of the output signal.
Preferably, when the control precision calibration module calibrates the PLC control cabinet, the control precision of the PLC control cabinet is adjusted to the minimum value of the allowable deviation range by acquiring the recent running state information of the PLC control cabinet, analyzing by combining a large database, determining a regulation command and corresponding parameter change.
Preferably, the network communication module is in signal connection with one or more PLC control cabinets through wireless signals or wired signals.
Compared with the prior art, the invention has the following beneficial effects:
by setting the control precision calibration module, the automatic timing calibration function of the control precision of the PLC control cabinet can be realized, the automatic calibration time period is set by using the timing unit, the calibration program is automatically started after the set time period is reached, and the response time evaluation value T of each component in the PLC control cabinet is respectively obtained by the delay acquisition unit, the input signal acquisition unit and the output signal acquisition unit kc Output signal evaluation value W kj Input signal evaluation value Q kj The three are used as specific evaluation parameters to calculate the control precision evaluation coefficient epsilon of the PLC control cabinet, and finally the epsilon is combined with the set control precision evaluation coefficient epsilon 0 Whether the control precision of the PLC control cabinet has deviation or not is determined, and relevant calibration is carried out according to the deviation result, so that the control precision of the PLC control cabinet and the stability in operation are ensured, the manual calibration is omitted, the workload of staff is reduced, and the calibration precision is ensured.
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Fig. 1 is a system block diagram of a remote control system of a PLC control cabinet according to the present invention.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
An embodiment of a remote control system for a PLC control cabinet according to the present invention will be further described with reference to fig. 1.
A remote control system of a PLC control cabinet, comprising: the system comprises a controller, an information acquisition module, a state analysis module, a data storage module, a network communication module and a control precision calibration module;
the information acquisition module is used for acquiring basic information corresponding to each component in the PLC control cabinet, and mainly acquires basic information of each switch and each circuit in the PLC control cabinet, wherein the basic information of the switch specifically comprises a switch state, a function, temperature and control information, the temperature information can be acquired through a temperature sensor, the basic information of the circuit specifically comprises input port current, output port current, input port voltage, output port voltage, input port signal intensity, output port signal intensity, input port signal frequency, output port signal frequency and external images, and the information can be acquired through corresponding sensors; the information acquisition module uploads the acquired information to the data storage module for storage by means of the network communication module.
The state analysis module is used for analyzing basic information corresponding to each component in the collected PLC control cabinet and evaluating whether the collected PLC control cabinet is in a normal running state or not; the state analysis module data processing unit is used for converting and processing basic information of each switch and each line received into analysis data types, uploading the analysis data to the data analysis unit, comparing the acquired analysis data with the set initial standard analysis data by searching the cloud database, determining whether the analysis data are abnormal or not, outputting analysis results, acquiring the analysis results by the controller, performing relevant control, timely solving the abnormal problems, and if the analysis data cannot be solved by autonomous regulation, generating an abnormal reminding warning to remind workers of timely solving the abnormal problems.
The network communication module is used for realizing control information transmission between the PLC control cabinet and the controller; the network communication module is in signal connection with one or more PLC control cabinets through wireless signals or wired signals, and workers can realize on-line remote control of the PLC control cabinets through the remote control end.
When the remote control system is in normal operation, the remote control system is connected with one or more PLC control cabinets through wireless signals, the information acquisition module is used for acquiring the operation states of all components in the PLC control cabinets in real time, the state analysis module is used for analyzing the acquired state information to evaluate whether the PLC control cabinets are in a normal operation state, if abnormal state is detected, abnormal state signals are sent to the controller, the controller sends related regulation and control instructions, the control instructions are sent to the PLC control cabinets through the network communication module, the PLC control cabinets are automatically regulated and controlled according to the instructions, abnormal problems are solved, and then the remote control system for the PLC control cabinets can realize remote monitoring of the PLC control cabinets, real-time feedback of the operation states and timely response of the abnormal problems, manual regulation and control of workers on the PLC control cabinets are not needed, and workload of the workers is reduced.
The control precision calibration module is used for regularly regulating the control precision of the PLC control cabinet and comprises a timing unit, a time delay acquisition unit, an input signal acquisition unit, an output signal acquisition unit and a control precision analysis unit, wherein the timing unit is used for setting a control precision calibration period of the PLC control cabinet, and the time delay acquisition unit is used for acquiring response time evaluation value T of a corresponding part of the PLC control cabinet after sending control information kc The method comprises the steps of carrying out a first treatment on the surface of the The input signal acquisition unit is used for acquiring input information of the PLC control cabinet and converting the input information into a corresponding input signal evaluation value Q kj The output signal acquisition unit is used for acquiring the input information of the PLC control cabinet and converting the output information into a corresponding output signal evaluation value W kj The method comprises the steps of carrying out a first treatment on the surface of the Wherein k represents the number corresponding to the component receiving the input information in the PLC control cabinet, k=1, 2, 3..n., c represents a number corresponding to the number of response times, c=1, 2, 3..o, j represents a number of times corresponding to the reception of the input information by the component receiving the input information in the PLC control cabinet, j=1, 2, 3..p; the control accuracy analysis unit is used for receiving the response time evaluation value T kc Input signal evaluation value Q kj And output signal evaluation value W kj And judge and collect PLC controlWhether the control precision of the cabinet manufacturing has deviation or not;
if the calibration period can be set to 7 days, after 7 days, the timing unit sends a signal to the controller, so that the controller sends a calibration instruction to the control precision calibration module, and the control precision calibration of the PLC control cabinet is started:
step one: the time of sending the input signal is obtained by a time delay acquisition unit and is marked as T 1 Acquiring output signal generation time and marking as T 2 According to the formulaCalculating response time, wherein lambda 1 And lambda (lambda) 2 Response time evaluation coefficient, generally lambda 1 And lambda (lambda) 2 The values are 1.25 and 0.86 respectively, wherein k represents the number corresponding to the part receiving the input information in the PLC control cabinet, and k=1, 2,3.
Step two: all control information in the PLC control cabinet is acquired through the input signal acquisition unit, the control information is screened out as the control information of the input signal, and the signal intensity B of the input signal is acquired kj Sum signal frequency C kj Inputting signal evaluation value using formulaWherein η is a weight factor of the input signal;
step three: all control information in the PLC control cabinet is acquired through the output signal acquisition unit, the control information is screened out as output signal, and the signal intensity D of the output signal is acquired kj Sum signal frequency E kj Inputting signal evaluation value using formulaWherein ρ is a weight factor of the output signal
Step four: receiving Q by control accuracy analysis unit kj 、W kj And utilize the formulaCalculating a control accuracy evaluation coefficient epsilon, wherein mu is corrected to be a coefficient Q 0 And W is equal to 0 The control precision evaluation coefficient epsilon is judged and set for the set standard input signal evaluation value and standard output signal evaluation value respectively 0 If epsilon>ε 0 If epsilon is less than or equal to epsilon, the control accuracy is considered to have larger deviation, calibration is needed 0 The control precision deviation is considered to be within the allowable range, and calibration is not needed; when the control precision calibration module calibrates the PLC control cabinet, the control precision of the PLC control cabinet is adjusted to the minimum value of the allowable deviation range by acquiring the recent running state information of the PLC control cabinet and analyzing by combining a large database, determining a regulation and control instruction and corresponding parameter change.
By setting the control precision calibration module, the automatic timing calibration function of the control precision of the PLC control cabinet can be realized, the automatic calibration time period is set by using the timing unit, the calibration program is automatically started after the set time period is reached, and the response time evaluation value T of each component in the PLC control cabinet is respectively obtained by the delay acquisition unit, the input signal acquisition unit and the output signal acquisition unit kc Output signal evaluation value W kj Input signal evaluation value Q kj The three are used as specific evaluation parameters to calculate the control precision evaluation coefficient epsilon of the PLC control cabinet, and finally the epsilon is combined with the set control precision evaluation coefficient epsilon 0 Whether the control precision of the PLC control cabinet has deviation or not is determined, and relevant calibration is carried out according to the deviation result, so that the control precision of the PLC control cabinet and the stability in operation are ensured, the manual calibration is omitted, the workload of staff is reduced, and the calibration precision is ensured.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining a "second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (8)
1. A remote control system of a PLC control cabinet, comprising: the system comprises a controller, an information acquisition module, a state analysis module, a data storage module, a network communication module and a control precision calibration module;
the information acquisition module is used for acquiring basic information corresponding to each component in the PLC control cabinet;
the state analysis module is used for analyzing basic information corresponding to each component in the collected PLC control cabinet and evaluating whether the collected PLC control cabinet is in a normal running state or not;
the network communication module is used for realizing control information transmission between the PLC control cabinet and the controller;
the control precision calibration module is used for regularly regulating and controlling the control precision of the PLC control cabinet and comprises a timing unit, a delay acquisition unit, an input signal acquisition unit, an output signal acquisition unit and a control precision analysis unit;
the timing unit is used for setting a period for calibrating the control precision of the PLC control cabinet; the delay timeThe acquisition unit is used for acquiring response time evaluation value T of corresponding component of the PLC control cabinet after sending control information kc The method comprises the steps of carrying out a first treatment on the surface of the The input signal acquisition unit is used for acquiring input information of the PLC control cabinet and converting the input information into a corresponding input signal evaluation value Q kj The output signal acquisition unit is used for acquiring the input information of the PLC control cabinet and converting the output information into a corresponding output signal evaluation value W kj The method comprises the steps of carrying out a first treatment on the surface of the Wherein k represents the number corresponding to the component receiving the input information in the PLC control cabinet, k=1, 2, 3..n., c represents a number corresponding to the number of response times, c=1, 2, 3..o, j represents a number of times corresponding to the reception of the input information by the component receiving the input information in the PLC control cabinet, j=1, 2, 3..p;
the control accuracy analysis unit is used for receiving the response time evaluation value T kc Input signal evaluation value Q kj And output signal evaluation value W kj And judging whether deviation exists in control precision of the integrated PLC control cabinet, specifically: by the formulaMu, a control accuracy evaluation coefficient epsilon is calculated, wherein, a correction coefficient Q 0 And W is equal to 0 The control precision evaluation coefficient epsilon is judged and set for the set standard input signal evaluation value and standard output signal evaluation value respectively 0 If epsilon>ε 0 If epsilon is less than or equal to epsilon, the control accuracy is considered to have larger deviation, calibration is needed 0 The control accuracy deviation is considered to be within the allowable range, and calibration is not required.
2. The remote control system of a PLC control cabinet according to claim 1, wherein the information acquisition module mainly acquires basic information of each switch and line in the PLC power distribution cabinet, wherein the basic information of the switch specifically includes a switch state, a function, a temperature, and control information, and the basic information of the line specifically includes an input port current, an output port current, an input port voltage, an output port voltage, an input port signal strength, an output port signal strength, an input port signal frequency, an output port signal frequency, and an external image.
3. The remote control system of the PLC control cabinet according to claim 1, wherein the state analysis module data processing unit, the data analysis unit and the cloud database, the data processing unit is configured to convert and process the received basic information of each switch and line into an analysis data type, upload the analysis data to the data analysis unit, and the data analysis unit compares the obtained analysis data with the set initial standard analysis data by searching the cloud database for the set initial standard analysis data, determines whether the analysis data is abnormal, and outputs the analysis result.
4. The remote control system of a PLC control cabinet according to claim 1, wherein the specific process of the delay acquisition unit in acquiring response time is: obtain the transmission time of the input signal and marked as T 1 Acquiring output signal generation time and marking as T 2 According to the formulaCalculating response time, wherein lambda 1 And lambda (lambda) 2 The response time evaluates the coefficients.
5. The remote control system of the PLC control cabinet according to claim 1, wherein the specific process of the input signal acquisition unit for acquiring the input signals of each component of the PLC control cabinet is as follows: acquiring all control information in a PLC control cabinet, screening out the control information as input signals, and acquiring the signal strength B of the input signals kj Sum signal frequency C kj Inputting signal evaluation value using formulaWhere η is a weight factor of the input signal.
6. According to claimThe remote control system of the PLC control cabinet of claim 1, wherein the specific process of the output signal acquisition unit for acquiring the input signals of each component of the PLC control cabinet is as follows: acquiring all control information in a PLC control cabinet, screening out the control information as output signals, and acquiring the signal strength D of the output signals kj Sum signal frequency E kj Inputting signal evaluation value using formulaWhere ρ is the weight factor of the output signal.
7. The remote control system of the PLC control cabinet according to claim 1, wherein the control accuracy calibration module, when calibrating the PLC control cabinet, determines the regulation command and the corresponding parameter change by acquiring the recent operation state information of the PLC control cabinet and analyzing the information in combination with the large database, and adjusts the control accuracy of the PLC control cabinet to the minimum value of the allowable deviation range.
8. The remote control system of PLC control cabinets according to claim 1, wherein the network communication module is in signal connection with one or more PLC control cabinets via wireless or wired signals.
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