CN111221303B - CAN bus-based automatic office conference demonstration system and control method thereof - Google Patents
CAN bus-based automatic office conference demonstration system and control method thereof Download PDFInfo
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Abstract
The invention provides an automatic office conference demonstration system based on a CAN bus, which comprises: the CAN bus communication circuit comprises at least one CAN controller and a CAN transceiver, has receiving and sending functions and CAN complete message filtering; the CAN bus communication circuit comprises a main control module, a plurality of controller nodes and a CAN bus communication circuit, wherein the controller nodes are connected with a CAN controller and CAN independently complete corresponding data processing and realize the communication function with the CAN bus communication circuit; the invention designs and develops an automatic office conference demonstration system based on a CAN bus, which CAN directly start the controller node to control the demonstration devices, CAN complete text communication, image-text conference, text transmission and voice communication among employees, CAN add and delete node equipment at any time based on a distributed architecture of the CAN bus, has simple logical relationship and reduces the failure rate, and also provides an automatic office conference demonstration control method based on the CAN bus.
Description
Technical Field
The invention relates to the field of automatic office, in particular to an automatic office conference demonstration system based on a CAN bus and an automatic office conference demonstration control method based on the CAN bus.
Background
The multimedia conference system, also called as a video conference system, refers to a system device for transmitting audio, video and file data to each other through a transmission line and multimedia devices for two or more individuals or groups in different places to achieve real-time and interactive communication and achieve the purpose of conference.
However, due to the limited display space and the presence of uncertainty in the number of participants, a certain flexible arrangement processing capability of the terminal device is required. The telephone conference is a conference mode which uses a telephone as a tool and uses a telephone line as a carrier to take a conference, and has the characteristics of rapid conference arrangement, no time and region limitation, low cost and the like. Since the requirements of the conference are changed in real time and the conference equipment has a relatively single purpose, the endpoint-based conference terminal product may cause the following problems for users:
firstly, the requirement of single use, redundant function and people communication is various, but the use of conference equipment is single, which leads to the fact that various equipment can be deployed in a current conference room, the capability of the conference is redundant, the connection is complex, the installation and configuration of various input and output power cables of various equipment are difficult, and the installation and configuration are difficult.
Secondly, in some special cases, because the demonstration engineer needs to demonstrate the product function on the spot, the conference needs to be started immediately in the conference management system. However, because the conference management system is preset with a program, the conference cannot be started immediately, so that the optimal time for conference presentation is delayed, and a lot of time is spent for conference problem integration arrangement before the conference is held, which wastes time.
The invention application with the application number of 201910070006.9 discloses a conference management method and a conference management system, wherein different permission operations are performed on a conference place by setting a user account and a privileged account, so that the requirement of the on-site conference demonstration on timeliness is met although the use of the privileged account for initiating a video networking conference is reduced, the control system permission of conference equipment is only changed, the problems of single use of the conference equipment, complex connection, complex logic relationship and difficult installation and configuration are still not solved, and the conference equipment is easy to break down.
The invention document with the application number of 200710135914.9 discloses a pointing control system for a multi-party presentation document conference, wherein a control module is installed in the system, and any participant in the conference can control a presentation document by controlling a mouse to edit and demonstrate the document on a display, but the problem caused by the control module is that all participants have the same control authority and can demonstrate the presentation document, the problem of disordered demonstration can occur, and a large amount of time is spent for meeting problem integration and arrangement before the meeting is held, so that the time is wasted.
Disclosure of Invention
The invention designs and develops an automatic office conference demonstration system based on a CAN bus, which CAN directly start a controller node to control a demonstration device, CAN complete character communication, image-text conference, character transmission and voice communication among employees, CAN add and delete node equipment at any time based on a distributed architecture of the CAN bus, has simple logical relationship and reduces the failure rate.
The invention also aims to provide an automatic office conference demonstration control method based on the CAN bus, which calculates the behavior scores of the sub-subjects through the fuzzy controller, and sequences the sub-subjects according to the behavior scores, thereby saving the conference time and ensuring the conference to be performed qualitatively and orderly.
An automatic office meeting demonstration system based on a CAN bus comprises:
the CAN bus communication circuit comprises at least one CAN controller and a CAN transceiver, has receiving and sending functions and CAN complete message filtering;
the main control module is connected with the CAN bus communication circuit and CAN monitor the working state of the system and effectively control the operation of the system;
the controller nodes are connected with the CAN controller and CAN independently complete corresponding data processing and realize the communication function with the CAN bus communication circuit;
the demonstration devices are connected with the controller nodes and can complete character communication, image-text conference, character transmission and voice communication among the employees;
the master control module CAN control one or more of the nodes to complete control and data transmission of a demonstration device or monitor the state of the CAN bus communication circuit.
Preferably, the main control module comprises a CAN node controller and a fuzzy controller;
the CAN node controller comprises a main node working mode and a slave node working mode;
when the controller is in the master node working mode, data communication between a master control module and the controller node is realized through the CAN bus;
and when the controller is in the slave node working mode, the data communication among the controller nodes is realized through the CAN bus.
Preferably, the master node operation mode includes: a master mode and a slave mode;
when the main control module is in an active mode, the main control module sends a data request instruction, receives data returned by aiming at the data request instruction, processes the returned data and then carries out instruction response;
when the device is in the driven mode, the main control module passively receives data, processes the received data and then carries out instruction response.
Preferably, the demonstration device is a touch industrial tablet computer.
A CAN bus-based automatic office conference demonstration control method comprises the following steps:
step one, a user inputs conference issue information in the presentation device, the conference issue information is transmitted to a main controller through a controller node, the main controller divides the conference issue information into a plurality of sub issues, each sub issue is endowed with an initial score and an initial weighted value, and a set of all sub issues forms a sub issue database;
inputting the number, the use frequency and the use time of the sub-subjects in a period of time into a fuzzy controller to obtain a weighting coefficient of each sub-subject;
step three, calculating and obtaining the behavior score of each sub-issue according to the initial scores of the sub-issues, the weighting coefficients of the sub-issues, the initial weighting coefficients of the sub-issues, the use frequency of the sub-issues and the scale factors;
and fourthly, arranging all the sub-issues in the database in a descending order according to the behavior scores, leading the updated sub-issue database into the main controller, and transmitting and displaying the updated sub-issue database on the demonstration device through the controller node.
Preferably, the step two of calculating the weighting coefficient of the behavior score sub-topic includes:
comparing the number of the sub-subjects with the number of the preset sub-subjects to obtain a sub-subject number deviation signal;
comparing the using time of the sub-subjects with the preset using time of the sub-subjects to obtain a deviation signal of the using time of the sub-subjects;
carrying out differential calculation on the sub-issue quantity deviation signal to obtain a sub-issue quantity change rate signal, and carrying out differential calculation on the sub-issue service time signal to obtain a sub-issue service time change rate signal;
and amplifying the sub-issue quantity change rate signal, the sub-issue use time change rate signal and the sub-issue use frequency, inputting the amplified signals into a two-dimensional fuzzy controller, and outputting the amplified signals as the weighting coefficients of the sub-issues.
Preferably, the behavior score calculation formula is:
wherein, Covi is a behavior score, Cov0 is an initial score of the sub-topic, χ is a weighting coefficient of the sub-topic, χ 0 is an initial weighting coefficient of the sub-topic, η is a use frequency of the sub-topic, e is a natural constant, and Kr is a scale factor.
Preferably, the fuzzy set of the sub-issue number change rate signal, the sub-issue usage time change rate signal and the sub-issue usage frequency is: { NB, NM, NS, ZR, PS, PM, PB }, NB representing negative large, NM representing negative medium, NS representing negative small, ZR representing zero, PS representing positive small, PM representing positive medium, PB representing positive large, their domains of discourse are: { -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6}.
Preferably, the membership functions of the input and output variables of the fuzzy controller are both triangular membership functions.
The invention has the advantages of
1. The invention designs and develops an automatic office conference demonstration system based on a CAN bus, which CAN directly start a controller node to control a demonstration device, CAN complete character communication, image-text conference, character transmission and voice communication among employees, CAN add and delete node equipment at any time based on a distributed architecture of the CAN bus, has simple logical relationship and reduces the failure rate.
2. The wiring between the controllers and between the demonstration devices is simple; when the control requirement is changed, hardware equipment does not need to be changed, and only software programming needs to be adjusted, so that the number of secondary elements is greatly reduced, and the logic structure is simple and convenient to maintain.
3. According to the automatic office conference demonstration control method based on the CAN bus, the behavior scores of the sub-topics are calculated through the fuzzy controller, the sub-topics are sorted according to the behavior scores, the conference time is saved, and the conference is guaranteed to be performed qualitatively and orderly.
Drawings
Fig. 1 is a block diagram of an automated office conference presentation system based on a CAN bus according to the present invention.
Fig. 2 is a flowchart of the method for controlling the presentation of the automatic office meeting based on the CAN bus according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1, the fire fighting equipment control system based on CAN bus provided by the invention comprises: the device comprises a CAN bus communication circuit, a main control module, a controller node and a plurality of demonstration devices.
The CAN bus communication circuit comprises at least one CAN controller and a CAN transceiver, has receiving and sending functions and CAN complete message filtering;
the main control module is connected with the CAN bus communication circuit and CAN monitor the working state of the system and effectively control the operation of the system;
and the controller nodes are connected with the CAN controller, each node CAN independently complete corresponding data processing and realize a communication function with the CAN bus communication circuit, and preferably, the controller nodes adopt STC15W204S chips.
The CAN bus communication circuit comprises a CAN bus communication circuit, a master control module, a CAN bus communication circuit and a plurality of nodes, wherein the master control module CAN control one or more of the nodes to complete function debugging, function control and data acquisition of a sensor, and CAN monitor the state of the CAN bus communication circuit;
in the upper computer control system, each node independently finishes corresponding tasks of data acquisition, processing, storage, display and the like, each node is an 'equal main body' during data communication, point-to-point communication is adopted, and each node CAN be used as a connection point of an upper computer and a CAN bus, wherein a main control module CAN control one or more of controller nodes to work, and software implementation of the CAN bus mainly comprises three parts, namely initialization of SJA1000, data receiving and sending.
The lower computer software utilizes the microprocessor to control the demonstration device, can complete character communication, image-text conference, character transmission and voice communication among employees, and controls the fire-fighting water pump and the smoke-proof fan equipment control system according to the control instruction of the upper computer. The data display and control functions between the upper computer and the lower computer are completed by realizing the CAN bus protocol in a software mode.
The lower computer control system mainly realizes two functions: firstly, a data acquisition module analyzes and processes a detection value, and a processing result is timely output to a CAN bus and is analyzed and processed by an upper computer; and secondly, the communication function with a CAN bus CAN be realized, the data of the lower computer CAN be transmitted to the upper computer in real time, and the control signal sent by the upper computer CAN be received in real time, so that the lower computer CAN be controlled.
Preferably, the master control module comprises a CAN node controller and a fuzzy controller, wherein the CAN node controller comprises a master node working mode and a slave node working mode;
when the controller is in the master node working mode, data communication between the master control module and the controller node is realized through the CAN bus;
when the controller is in the slave node working mode, data communication among the controller nodes is realized through the CAN bus.
Wherein, the master node mode of operation includes: a master mode and a slave mode;
when the main control module is in the active mode, the main control module sends a data request instruction, receives data returned by aiming at the data request instruction, processes the returned data and then carries out instruction response;
when the master control module is in the slave mode, the master control module passively receives data, processes the received data and then carries out instruction response.
As shown in fig. 2, a method for controlling an automated office conference presentation based on a CAN bus includes:
step S110, a user inputs conference issue information in the presentation device, the conference issue information is transmitted to a main controller through a controller node, the main controller divides the conference issue information into a plurality of sub issues, each sub issue is endowed with an initial score and an initial weighted value, and a sub issue database is formed by the set of all the sub issues;
step S120, inputting the number, the use frequency and the use time of the sub-subjects in a period of time into a fuzzy controller to obtain a weighting coefficient of each sub-subject; the weighting coefficient calculation process includes:
comparing the number Q of the sub-subjects with the number of the preset sub-subjects to obtain the deviation signal of the number of the sub-subjects
Comparing the sub-issue time T with the preset sub-issue time T to obtain the sub-issue time deviation signal
Obtaining a sub-topic quantity change rate signal dQ by differentiating the sub-topic quantity deviation signal delta Q,
carrying out differential calculation on the sub-issue use time signal delta T to obtain a sub-issue use time change rate signal dT;
wherein, the actual variation ranges of dQ, dT, eta and chi are respectively [ -30,30], [ -0.5,0.5], [ -1,1], [ -1,1 ]; their discrete domains of discourse are { -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6}
Then the scaling factor k1 is 6/30, k2 is 6/0.5, k3 is 6/1, and k3 is 6/1.
The sub-issue quantity change rate signal dQ, the sub-issue use time change rate signal dT and the sub-issue use frequency eta are amplified together and input into a two-dimensional fuzzy controller, and the amplified signals are output as the weighting coefficient chi of the sub-issue.
Defining fuzzy subsets and membership functions
Divide the sub-issue number of change rate signal dQ into 7 fuzzy states: PB (positive large), PM (positive small), PS (positive small), 0 (zero), NS (negative small), NM (negative medium), NB (negative large), and a membership function table of the sub-issue number change rate signal dQ is obtained by combining experience, as shown in table 1.
TABLE 1 membership function table of subissue quantity change rate signal dQ
| dQ | -6 | -5 | -4 | -3 | -2 | -1 | -0 | +1 | +2 | +3 | +4 | +5 | +6 |
| PB | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.7 | 1.0 |
| PM | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 |
| PS | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1.0 | 0.5 | 0 | 0 | 0 | 0 | 0 |
| NB | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NM | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NS | 0 | 0.7 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The sub-issue uses the time rate of change signal dT to divide into 7 fuzzy states: PB (positive large), PM (positive small), PS (positive small), 0 (zero), NS (negative small), NM (negative medium), NB (negative large), and a membership function table of the sub-issue quantity change rate signal dT is obtained by combining experience, and is shown in table 2.
TABLE 2 Subscription Using membership function Table of time-rate of change signals dT
| dT | -6 | -5 | -4 | -3 | -2 | -1 | -0 | +1 | +2 | +3 | +4 | +5 | +6 |
| PB | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.7 | 1.0 |
| PM | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 |
| PS | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1.0 | 0.5 | 0 | 0 | 0 | 0 | 0 |
| NB | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NM | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NS | 0 | 0.7 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The sub-issue use frequency η is divided into 7 fuzzy states: PB (positive big), PM (positive middle), PS (positive small), 0 (zero), NS (negative small), NM (negative middle) and NB (negative big), and a membership function table of the sub-topic use frequency eta is obtained by combining experience, and is shown in table 3
Table 3 is a table of membership functions of the sub-issue use frequency η
| dT | -6 | -5 | -4 | -3 | -2 | -1 | -0 | +1 | +2 | +3 | +4 | +5 | +6 |
| PB | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.7 | 1.0 |
| PM | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 |
| PS | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1.0 | 0.5 | 0 | 0 | 0 | 0 | 0 |
| NB | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NM | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NS | 0 | 0.7 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The weighting coefficient χ for the sub-issue is 7 fuzzy states: PB (positive big), PM (positive middle), PS (positive small), 0 (zero), NS (negative small), NM (negative middle), NB (negative big), and a membership function table of weighting coefficients χ of the sub-topics is obtained by combining experience, and is shown in table 4
| χ | -6 | -5 | -4 | -3 | -2 | -1 | -0 | +1 | +2 | +3 | +4 | +5 | +6 |
| PB | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.7 | 1.0 |
| PM | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 |
| PS | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1.0 | 0.5 | 0 | 0 | 0 | 0 | 0 |
| NB | 0 | 0 | 0.2 | 0.8 | 1.0 | 0.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NM | 0.2 | 0.8 | 1.0 | 0.8 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| NS | 0 | 0.7 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The fuzzy inference process must implement complex matrix operation, the calculated quantity is very large, the on-line inference is difficult to meet the real-time requirement of control system, the invention adopts table look-up method to make fuzzy inference operation, the fuzzy inference decision adopts three-input single-output mode, and can summarize the primary control rule of the fuzzy controller by experience, in which the parameter chi control rule is shown in table 5
The fuzzy controller defuzzifies the output signal according to the obtained fuzzy value to obtain the opening of the fire pump, a fuzzy control inquiry table is obtained, the domain of discourse is discrete, the fuzzy control rule can be expressed as a fuzzy matrix, the fuzzy control inquiry table is obtained by adopting single-point fuzzification, and the table is shown in a table 6
TABLE 6 fuzzy control look-up table
Step S130, obtaining the behavior score of each sub-issue according to the initial score, the initial weighted value and the weighting system of the sub-issue; the behavior score is calculated by the formula:
wherein, CoviAs a behavioral score, Cov0Is the initial score of the sub-issue,. chi is the weighting factor of the sub-issue,. chi0Is the initial weighting factor for the sub-issue,eta is the frequency of sub-issue, e is the natural constant, KrIs a scale factor.
And step S140, arranging all the sub-issues in the database in a descending order according to the behavior scores, importing the updated sub-issue database into the main controller, and transmitting and displaying the updated sub-issue database on the demonstration device through the controller node.
The invention designs and develops an automatic office conference demonstration system based on a CAN bus, which CAN directly start a controller node to control a demonstration device, CAN complete character communication, image-text conference, character transmission and voice communication among employees, CAN add and delete node equipment at any time based on a distributed architecture of the CAN bus, has simple logical relationship and reduces the failure rate. The wiring between the controllers and between the demonstration devices is simple; when the control requirement is changed, hardware equipment does not need to be changed, and only software programming needs to be adjusted, so that the number of secondary elements is greatly reduced, and the logic structure is simple and convenient to maintain. According to the automatic office conference demonstration control method based on the CAN bus, the behavior scores of the sub-topics are calculated through the fuzzy controller, the sub-topics are sorted according to the behavior scores, the conference time is saved, and the conference is guaranteed to be performed qualitatively and orderly.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (4)
1. A CAN bus-based automatic office conference demonstration control method is characterized by comprising a demonstration system and a demonstration control method adopted by the demonstration system, wherein,
the demonstration system comprises:
the CAN bus communication circuit comprises at least one CAN controller and a CAN transceiver, has receiving and sending functions and CAN complete message filtering; the main control module is connected with the CAN bus communication circuit and CAN monitor the working state of the system and effectively control the operation of the system; the controller nodes are connected with the CAN controller and CAN independently complete corresponding data processing and realize the communication function with the CAN bus communication circuit; the demonstration devices are connected with the controller nodes and can complete character communication, image-text conference, character transmission and voice communication among the employees; the master control module CAN control one or more of the nodes to complete control and data transmission of a demonstration device or monitor the state of the CAN bus communication circuit;
the main control module comprises a CAN node controller and a fuzzy controller; the CAN node controller comprises a main node working mode and a slave node working mode; when the controller is in the master node working mode, data communication between a master control module and the controller node is realized through the CAN bus; when the controller is in a slave node working mode, data communication among the controller nodes is realized through the CAN bus;
the master node operating mode includes: a master mode and a slave mode; when the main control module is in an active mode, the main control module sends a data request instruction, receives data returned by aiming at the data request instruction, processes the returned data and then carries out instruction response; when the master control module is in a slave mode, the master control module passively receives data, processes the received data and then carries out instruction response;
the demonstration control method comprises the following steps:
step one, a user inputs conference issue information in a presentation device, the conference issue information is transmitted to a main controller through a controller node, the main controller divides the conference issue information into a plurality of sub issues, each sub issue is endowed with an initial score and an initial weighted value, and a set of all the sub issues forms a sub issue database;
inputting the number, the use frequency and the use time of the sub-subjects in a period of time into a fuzzy controller to obtain a weighting coefficient of each sub-subject;
step three, calculating and obtaining the behavior score of each sub-issue according to the initial scores of the sub-issues, the weighting coefficients of the sub-issues, the initial weighting coefficients of the sub-issues, the use frequency of the sub-issues and the scale factors;
arranging all sub-issues in the database in a descending order according to the behavior scores to obtain an updated sub-issue database, importing the updated sub-issue database into the main controller, and transmitting and displaying the updated sub-issue database on the demonstration device through the controller node;
the calculation process of the weighting coefficient of the sub-topic in the step two comprises the following steps: comparing the number of the sub-subjects with the number of the preset sub-subjects to obtain a sub-subject number deviation signal; comparing the using time of the sub-subjects with the preset using time of the sub-subjects to obtain a deviation signal of the using time of the sub-subjects; carrying out differential calculation on the sub-issue quantity deviation signal to obtain a sub-issue quantity change rate signal, and carrying out differential calculation on the sub-issue service time signal to obtain a sub-issue service time change rate signal; amplifying the sub-issue quantity change rate signal, the sub-issue use time change rate signal and the sub-issue use frequency, inputting the amplified signals into a two-dimensional fuzzy controller, and outputting the amplified signals as the weighting coefficients of the sub-issues;
the behavior score calculation formula is as follows:
wherein, CoviAs a behavioral score, Cov0Is the initial score of the sub-issue,. chi is the weighting factor of the sub-issue,. chi0Is the initial weighting coefficient of the sub-issue, eta is the use frequency of the sub-issue, e is the natural constant, KrIs a scale factor.
2. The CAN bus-based presentation control method for the automated office meeting according to claim 1, wherein the presentation device is a touch industrial tablet computer.
3. The CAN bus based presentation control method for automated office conference according to claim 1, wherein the fuzzy sets of the sub-issue number change rate signal, the sub-issue usage time change rate signal and the sub-issue usage frequency are: { NB, NM, NS, ZR, PS, PM, PB }, NB representing negative large, NM representing negative medium, NS representing negative small, ZR representing zero, PS representing positive small, PM representing positive medium, PB representing positive large, their domains of discourse are: { -6, -5, -4, -3, -2, -1,0,1,2,3,4,5,6}.
4. The CAN bus-based presentation control method for automated office conferences according to claim 3, wherein the membership functions of the input and output variables of the fuzzy controller each select a triangular membership function.
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