CN108089963B - Multimedia classroom computer allowance detection method and device - Google Patents

Multimedia classroom computer allowance detection method and device Download PDF

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CN108089963B
CN108089963B CN201711200688.8A CN201711200688A CN108089963B CN 108089963 B CN108089963 B CN 108089963B CN 201711200688 A CN201711200688 A CN 201711200688A CN 108089963 B CN108089963 B CN 108089963B
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CN108089963A (en
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陈海哨
郭均纺
孔向东
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Shanghai Yingfang Information Technology Co ltd
Wenzhou University of Technology
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Wenzhou University Oujiang College
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06F11/30—Monitoring
    • G06F11/3055—Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • G06F11/3006—Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system is distributed, e.g. networked systems, clusters, multiprocessor systems
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
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Abstract

本发明公开了一种多媒体教室电脑余量检测方法，包括以下步骤：教师端控制学生端开机；学生端内的摄像头通过色标传感器对电脑进行识别并发送信号至PLC控制器；PLC控制器根据反馈信号进行余量统计；若超过设定余量，PCL则自动发出通知信号；摄像头关机，正常上课；课程结束后学生端关机,PLC控制器复位。本发明还公开了一种多媒体教室电脑余量检测装置，包括教师端以及与教师端连接的若干学生端，还包括控制端PLC控制器,学生端包括显示器和摄像头，摄像头设置有色标传感器并能进行色差识别，根据色差识别的结果反馈信号至PLC控制器。本发明具有以下优点和效果：能对多媒体教室内电脑进行监测，若电脑故障数量过多，PLC控制器会自动发送通知信号给工作人员。

Figure 201711200688

The invention discloses a computer margin detection method in a multimedia classroom, comprising the following steps: a teacher terminal controls a student terminal to start up; a camera in the student terminal identifies the computer through a color mark sensor and sends a signal to a PLC controller; The feedback signal is used for residual statistics; if the set margin is exceeded, the PCL will automatically send a notification signal; the camera will be turned off and the class will be held normally; after the course is over, the student terminal will be shut down and the PLC controller will be reset. The invention also discloses a computer margin detection device in a multimedia classroom, which includes a teacher terminal, a plurality of student terminals connected to the teacher terminal, and a control terminal PLC controller. The student terminal includes a display and a camera, and the camera is provided with a color mark sensor and can Perform chromatic aberration identification, and feed back the signal to the PLC controller according to the color difference identification result. The invention has the following advantages and effects: the computer in the multimedia classroom can be monitored, and if the number of computer failures is too large, the PLC controller will automatically send a notification signal to the staff.

Figure 201711200688

Description

Multimedia classroom computer allowance detection method and device
Technical Field
The invention relates to the technical field of multimedia teaching, in particular to a method and a device for detecting computer surplus in a multimedia classroom.
Background
With the rapid development of information technology, the traditional education system staying in the inherent mode of chalk and blackboard is strongly impacted. At present, computer multimedia is permeating every corner of social life, which can greatly improve the working efficiency of people and change the life appearance of people. The high-performance campus multimedia system is an indispensable hardware facility for measuring school ability and level, a teacher can guide students through multimedia teaching, and meanwhile, the teaching mode of the students with the sound and image is easier to grasp and accept.
However, the computers at the student end often have various problems due to long-term use, so that the computers cannot be normally started, meanwhile, a mode for conveniently detecting the number of computer faults in a classroom is lacked in a multimedia classroom, and when the number of computer faults is too large, the situation that the number of computers is not enough for students is caused, so that the teaching of teachers is seriously influenced.
Disclosure of Invention
The invention aims to provide a computer allowance detection method for a multimedia classroom, which can identify a computer through a color code sensor in a camera and send a signal to a PLC (programmable logic controller), and if the number of computer faults exceeds a set value, the PLC can send a notification signal to a worker.
The technical purpose is realized by the following technical scheme: a multimedia classroom computer residual amount detection method comprises the following steps: 1) the teacher end controls the student end to start up; 2) the method comprises the following steps that a camera near a student end is started, whether a computer is started or not is identified through a color code sensor, and corresponding signals are fed back to a PLC controller respectively; 3) The PLC carries out margin statistics according to the feedback signal to obtain a margin statistic value x; 4) the PLC compares the residual quantity statistic value x with a set residual quantity, and if the residual quantity statistic value x is larger than the set residual quantity, a notification signal is automatically sent out; 5) shutting down the camera and normally giving lessons; 6) after the course is finished, the teacher end controls the student end to shut down, and the PLC resets.
By adopting the technical scheme, the PLC can carry out margin statistics according to the feedback signal and obtain a margin statistic value x, the margin statistic value x is compared with the set margin, if the margin statistic value x is larger than the set margin, the PCL automatically sends out a notification signal to notify a worker to prepare for maintenance; if the set margin is not exceeded, the notice signal is not sent out, and the class is normally attended.
Further setting the following steps: the color mark sensor is used for detecting the edge of the computer display screen, wherein the distribution of the edge is represented by a gradient, and for a two-dimensional function f (x, y), the two-dimensional function can be defined in the form of a vector, and the following steps are provided:
Figure 805731DEST_PATH_IMAGE001
the gradient magnitude of the vector can be approximated by an absolute value:
Figure 603922DEST_PATH_IMAGE002
and x and y are the acquisition coordinate points of the color scale sensor respectively.
By adopting the technical scheme, the color mark sensor can calculate the gradient amplitude G (x, y) of the vector and feed back the gradient amplitude G (x, y) to the PLC, the algorithm can improve the accuracy by changing the gradient amplitude G (x, y) of a large number of vectors collected by the collection coordinate point of the color mark sensor, and meanwhile, the approximate calculation can ensure the accuracy of the result and correspondingly reduce the calculation amount.
Further setting the following steps: and the PLC carries out margin statistics according to the gradient amplitudes G (x, y) of the received vectors to obtain a feedback signal 1 and a feedback signal 0, wherein the margin statistic value x is the number of the feedback signals 0.
By adopting the technical scheme, the PLC controller obtains the feedback signal 1 if the student-side computer is normally started up and obtains the feedback signal 0 if the student-side computer cannot be normally started up through processing, and the feedback signals are distinguished.
Further setting the following steps: the set allowance =2/3 (a-B), wherein a is the total number of computers at the student end in the classroom, B is the number of students in class, and the PLC controller starts the notification signal when the allowance statistic value x is larger than the set allowance.
By adopting the technical scheme, the set allowance is set and compared with the statistical allowance value x, if the statistical allowance value x is larger than the set allowance, the number of the computers indicating faults is too large, the PLC controller can send out a notification signal to a worker, and the worker is notified to prepare for maintenance.
Further setting the following steps: the teacher end controls the student end to start up, and the camera is started after 2 minutes of delay.
By adopting the technical scheme, the computer at the student end can be started within 2 minutes, and then the camera is started for identification, so that the accuracy of the feedback signal of the camera is improved.
The invention also aims to provide a computer allowance detection device for a multimedia classroom, wherein a color code sensor is arranged on a camera to collect a computer screen and feed the collected computer screen back to a PLC (programmable logic controller), and if the computer fails, the computer is rotated by 90 degrees by virtue of a rotating platform, so that the computer is indicated to fail.
The technical purpose is realized by the following technical scheme: the utility model provides a multimedia classroom computer surplus detection device, includes teacher's end and a plurality of students ' end of being connected with the teacher's end, still includes the PLC controller, the student end includes display and camera, the picture that the display screen just can be caught to the oblique side that the camera is located the display screen, the camera is provided with color mark sensor and can carries out the colour difference discernment, according to colour difference discernment result feedback signal to PLC controller.
Through adopting above-mentioned technical scheme, the teacher end is connected the student and can control opening and closing of student end computer, and the camera is provided with the color mark sensor, can detect the colour difference of screen through the color mark sensor to judge whether the computer has started and feedback signal to the PLC controller.
Further setting the following steps: the student end still includes the revolving stage, display fixed connection is in the top of revolving stage, be provided with actuating mechanism on the revolving stage, this actuating mechanism controls through the PLC controller.
Through adopting above-mentioned technical scheme, the rotation of PLC controller can be through the revolving stage of actuating mechanism control, revolving stage and display fixed connection, can drive the display and rotate together when the revolving stage rotates, and the angle of rotation is preferred 90 degrees, through observing, just can distinguish very easily that has rotated and not pivoted display.
In conclusion, the invention has the following beneficial effects: the computer display screen is detected through the camera internal color mark sensor, and signals are fed back to the PLC. The computer that breaks down rotates 90 degrees, convenient differentiation, and PLC controller carries out the surplus statistics according to feedback signal simultaneously, if the computer that breaks down surpasss the settlement quantity, the PLC controller can send the notice signal and maintain for the staff, has realized automatic computer fault management flow, does not need the staff real-time detection computer whether breaks down, also can avoid the student to go to class the not enough condition of computer.
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FIG. 1 is a schematic view of the structure of the device in the embodiment;
FIG. 2 is a flowchart of a control method according to an embodiment.
In the figure: 1. a teacher end; 2. a student end; 3. a PLC controller; 4. a display; 5. a rotating table; 6. a camera is provided.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the device for detecting the computer surplus in the multimedia classroom comprises a teacher end and a plurality of student ends connected with the teacher end, wherein the teacher end can control the on and off of a computer in the student ends, and the device further comprises a control end PLC (programmable logic controller), and the PLC is connected with the teacher end and the student ends and can control devices in the teacher end and the student ends. The student end includes computer, display, revolving stage and camera, and wherein the camera is located the oblique side of display screen and can catches the picture of display screen, and the camera is provided with the color mark sensor and can carries out the colour difference discernment to the screen of display, feeds back signal to the PLC controller according to the result of colour difference discernment. The principle of color difference identification is as follows: the periphery of the screen of the display is provided with a black frame respectively, when the screen is in a black screen state, color difference cannot be generated between the screen and the black frame, and at the moment, the color scale sensor does not recognize the color difference; when the screen of the display is normally bright, the picture appears in the screen and generates obvious color difference with the surrounding black frame, and at the moment, the color scale sensor can identify the color difference. Specifically, the method comprises the following steps: the color mark sensor is used for detecting the edge of the computer display screen, wherein the distribution of the edge is represented by a gradient, and for a two-dimensional function f (x, y), the two-dimensional function can be defined in the form of a vector, and the following steps are provided:
Figure 333981DEST_PATH_IMAGE001
the gradient magnitude of the vector can be approximated by an absolute value:
Figure 799597DEST_PATH_IMAGE002
and x and y are the acquisition coordinate points of the color scale sensor respectively. The collection coordinate point in the color scale sensor can move along a set track, wherein the gradient amplitude G1 (x, y) of the vector of the black frame part around the display is collected in advance, the gradient amplitude G (x, y) of the corresponding coordinate vector can be detected through the movement of the collection point, if the two values are equal through comparison, the coordinate is represented as a black screen state, an invalid signal is sent to the PLC, if the two values are not equal, the coordinate color is represented as other colors except black, and an effective signal is sent to the PLC for control. The number of the coordinate acquisition points is 800 × 600, and based on a large number of coordinate acquisition points, very accurate data can be obtained through the PLC. Comparing the effective signals with the ineffective signals, considering that the desktop of the display can have black color, setting a threshold value N, wherein the threshold value N is 800 x 600 x 1%, if the number of the effective signals is greater than or equal to the threshold value N, indicating that the screen of the display is normally lightened, and controlling by the PLC to obtain a feedback signal 1; if the number of the effective signals is smaller than the threshold value N, the PLC obtains a feedback signal 0, which indicates that the display fails to start.
In addition, the display is located the top of revolving stage and with revolving stage fixed connection, and the revolving stage can carry out circumferential direction through the pivot, can drive the display and rotate together when the revolving stage rotates, and the rotation of revolving stage can be controlled to the PLC controller. The multimedia classroom is polar electronic software, a teacher end in the multimedia classroom controls a student end through teaching software of the wave multimedia teaching, the PLC controller is a Siemens 6ES7314-6CH04-0AB0 programmable PLC controller, and the color code sensor is KT 6W-2.
Referring to fig. 1 and 2, first, after the teacher end point clicks the command of the student end to start up, the computer in the student end is started up, and then the camera is turned on. In order to ensure that the computer in the student end is started before the camera is started, the camera is started after the computer in the student end receives a starting command and the starting time is delayed for 2 minutes, the computer is not started for 2 minutes, the computer fails to start normally, and the color difference identification is carried out by the color mark sensor in the camera, so that the accuracy of the collected color difference can be ensured. If the display cannot be normally started, the PLC controller can obtain a feedback signal 0 after processing the effective signal and the invalid signal fed back by the color mark sensor; if the display can be normally started, the PLC controller can obtain a feedback signal 1 after processing the effective signal and the invalid signal fed back by the color mark sensor; and then the PLC receives the feedback signals and then carries out margin statistics, the feedback signals 0 are accumulated, the feedback signals 1 are not accumulated, the feedback signals of all the student-end inner color mark sensors are processed one by one, and finally a margin statistic value x is accumulated. In addition, when the computer in this student end breaks down, PLC controller can make the revolving stage rotatory certain angle through the actuating mechanism in the revolving stage this moment, and the computer that is located the revolving stage top is connected with revolving stage fixed, consequently also can follow the revolving stage and rotate together, signals this computer and breaks down unable normal use. The drive mechanism is a motor, and the PLC controller controls the rotation of the rotary table by the motor, and the rotation angle is set to 90 degrees for direct observation.
The balance statistic x is then compared to the set balance, where set balance =2/3 (total number of student ends in classroom-number of students) and must be taken along at a point. For example, if the total number of students in classroom a is 60 and the number of students in classroom a is 50, the margin =2/3 (60-50) is set, and the result is 7 by one digit after the decimal point. If the margin statistic value x is larger than 7, the number of the computer faults is larger than the specified number, the PLC sends a notification signal to a worker, and the worker is ready to maintain before; if the margin statistic value x is less than or equal to 7 at the moment, the number of the computer faults is within a fixed number, and the PLC does not perform corresponding processing.
After the PLC controller carries out the surplus comparison, the PLC controller sends the shutdown command to the camera in all student's ends and controls all cameras to shut down, and the shutdown of camera can prevent that factors such as personnel's motion from bringing the maloperation, influences the collection degree of accuracy of the color mark sensor in the camera. And then, the student normally carries out the class, and after the teacher end point clicks the shutdown command of the student end after the class is finished, the computer in the student end is shut down. The PLC controller resets after receiving teacher's end shutdown command, and surplus statistics is clear 0, and PLC controller also can "reset" according to the control revolving stage simultaneously, and the revolving stage that has rotated 90 degrees is just changeed along former route promptly to control, resumes to original position. The total computer number of each classroom in the allowance setting value is fixed, the number of students in class is input by a teacher at a computer of a teacher end before class, then the set allowance is automatically calculated after the teacher end controls a starting command of the student end, and if the teacher does not input the allowance, the default value of the set allowance is 7.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (5)

1.一种多媒体教室电脑余量检测方法，其特征在于，包括：1. a multimedia classroom computer margin detection method, is characterized in that, comprises: 1)教师端控制学生端开机；1) The teacher terminal controls the student terminal to turn on; 2)学生端内的摄像头开机并通过色标传感器识别电脑是否已经开机，分别发送相应信号至PLC控制器；2) The camera in the student terminal is turned on and the color mark sensor is used to identify whether the computer has been turned on, and send corresponding signals to the PLC controller respectively; 3)PLC控制器根据反馈信号进行余量统计，得到余量统计值x；3) The PLC controller performs the residual statistics according to the feedback signal, and obtains the residual statistical value x; 4)PLC控制器将余量统计值x与设定余量比较，若余量统计值x大于设定余量，则自动发出通知信号，通知工作人员准备前来维修；4) The PLC controller compares the residual statistical value x with the set residual. If the residual statistical value x is greater than the set residual, it will automatically send a notification signal to notify the staff to prepare for maintenance; 5)若没有超过设定余量则不发出通知信号，摄像头关机，正常上课；5) If the set margin is not exceeded, no notification signal will be sent, the camera will be turned off, and the class will be held normally; 6)课程结束后教师端控制学生端关机,PLC控制器复位，所述设定余量＝2/3*(A-B)，式中A为教室总的学生端电脑数量，B为上课的学生数量，且逢点必进，若余量统计值x大于设定余量，PLC控制器则发动通知信号，6) After the course ends, the teacher controls the students to shut down, and the PLC controller resets. The set margin = 2/3*(A-B), where A is the total number of student computers in the classroom, and B is the number of students in class , and must enter every point, if the residual statistical value x is greater than the set residual, the PLC controller will send a notification signal, 还包括多媒体教室电脑余量检测装置，多媒体教室电脑余量检测装置包括教师端以及与教师端连接的若干学生端，其特征在于：还包括PLC控制器,所述学生端包括显示器和摄像头，所述摄像头位于显示器屏幕的斜侧面且能捕捉到显示器屏幕的画面，所述摄像头设置有色标传感器并能进行色差识别，根据色差识别的结果反馈信号至PLC控制器。It also includes a multimedia classroom computer margin detection device. The multimedia classroom computer margin detection device includes a teacher terminal and several student terminals connected to the teacher terminal. It is characterized in that it also includes a PLC controller, and the student terminal includes a display and a camera. The camera is located on the oblique side of the display screen and can capture the picture of the display screen. The camera is provided with a color mark sensor and can perform color difference identification, and feed back a signal to the PLC controller according to the color difference identification result. 2.根据权利要求1所述的一种多媒体教室电脑余量检测方法，其特征在于，所述色标传感器对电脑显示屏进行边缘检测，其中边缘的分布用梯度来表示，对于二维函数f(x，y)，可以定义为向量的形式，则有：2. a kind of multimedia classroom computer margin detection method according to claim 1, is characterized in that, described color mark sensor carries out edge detection to computer display screen, and wherein the distribution of edge is represented by gradient, for two-dimensional function f (x, y), which can be defined in the form of a vector, there are:
Figure FDA0002716221650000021
所述向量的梯度幅值可以用绝对值来近似表示：G(x，y)≈|Gx|+|Gy|，其中x，y分别为色标传感器的采集坐标点。
Figure FDA0002716221650000021
The gradient magnitude of the vector can be approximated by an absolute value: G(x, y)≈|G x |+|G y |, where x and y are the acquisition coordinate points of the color mark sensor, respectively. 3.根据权利要求2所述的一种多媒体教室电脑余量检测方法，其特征在于，所述PLC控制器根据接收若干向量的梯度幅值G(x,y)进行余量统计，得出反馈信号1与反馈信号0，其中余量统计值x为反馈信号0的数量。3. a kind of multimedia classroom computer margin detection method according to claim 2, is characterized in that, described PLC controller carries out margin statistics according to the gradient amplitude G(x, y) that receives several vectors, obtains feedback Signal 1 and feedback signal 0, where the residual statistic x is the number of feedback signal 0s. 4.根据权利要求1所述的一种多媒体教室电脑余量检测方法，其特征在于，所述教师端控制学生端开机，经过2分钟的延迟后摄像头开启。4 . The method for detecting computer margins in a multimedia classroom according to claim 1 , wherein the teacher terminal controls the student terminal to turn on, and the camera is turned on after a delay of 2 minutes. 5 . 5.根据权利要求1所述的一种多媒体教室电脑余量检测方法，其特征在于，所述学生端还包括旋转台，所述显示器固定连接于旋转台的上方，所述旋转台上设置有驱动机构，该驱动机构通过PLC控制器进行控制。5. A method for detecting computer margins in a multimedia classroom according to claim 1, wherein the student end further comprises a rotary table, the display is fixedly connected to the top of the rotary table, and the rotary table is provided with The drive mechanism is controlled by the PLC controller.
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