CN104851063A - Experiment evaluation system and process management method thereof - Google Patents
Experiment evaluation system and process management method thereof Download PDFInfo
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- CN104851063A CN104851063A CN201510246397.7A CN201510246397A CN104851063A CN 104851063 A CN104851063 A CN 104851063A CN 201510246397 A CN201510246397 A CN 201510246397A CN 104851063 A CN104851063 A CN 104851063A
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Abstract
The invention provides an experiment evaluation system for carrying out evaluation on an experiment process of an experimenter. The system comprises a collection terminal, a storage server, and a monitor, wherein the storage server and the monitor are connected with the collection terminal. The collection terminal includes a pick-up head for collecting a video image of an experiment process and an experimenter. The collection terminal outputs a video signal with the video image to the storage server and the monitor; the storage server stores the video signal, so that a user having predetermined permission can read the signal; and the monitor plays the video signal. In addition, the invention also provides a process management method of the experiment evaluation system. Therefore, a teacher can observe and evaluate an experiment process of a student conveniently during teaching, so that the teacher can guide the experiment process of the student conveniently, thereby improving the practical operational ability of the student.
Description
Technical field
The present invention relates to a kind of appraisal system, particularly a kind of for the system checked and rated by the experimentation of examination person.
Background technology
Scientific spirit and scientism are the important contents of quality-oriented education, and allowing student experience in experimentation and to obtain scientific knowledge, is that other teaching means is irreplaceable.But in current tutoring system, owing to being difficult to the experimentation observing and check and rate student, therefore ubiquity is focused on the light experiment of instruction, is weighed the Similar Problems that exercise practises light work training etc., makes the teaching of experiment and examination be difficult to abundant enforcement.
Need a kind of scheme, make it possible to be convenient in teaching to observe, the experimentation of examination student, thus be convenient to the experimentation of teaching person to student and instruct, to improve the practical operative ability of student.
Summary of the invention
For this reason, the invention provides a kind of experimental assessment system, for checking and rating the experimentation of experimenter, comprise acquisition terminal and the storage server be connected with described acquisition terminal respectively and monitor, wherein, described acquisition terminal comprises camera, the video image of the experimentation of described camera collection experimenter, and the vision signal with described video image is outputted to described storage server and described monitor by described acquisition terminal respectively; Described vision signal stores by described storage server, reads for the user with predetermined right; Described vision signal is play by described monitor.
Further, described acquisition terminal also comprises scrambler, the described video image of described camera collection is formed as described vision signal after described encoder encodes, wherein, described scrambler encodes to obtain the first vision signal to described video image with the first coded system, and described first vision signal is outputted to described storage server by described acquisition terminal; And described scrambler encodes to obtain the second vision signal to described video image with the second coded system, described second vision signal is outputted to described monitor by described acquisition terminal.
Further, the number of described acquisition terminal is multiple, and each described acquisition terminal is arranged near each laboratory table in examination hall respectively, with the video image of the experimentation of the experimenter of laboratory table each described in acquisition operations.
Further, this system also comprises examination terminal, described examination terminal comprises interconnective analysis module and data statistics module, wherein, described analysis module is analyzed the experimentation of experimenter in described vision signal thus is checked and rated, the experiment information of the resource that the whether correct and experiment of the operation of, experimental procedure, each step consuming time with the experiment obtaining this experimenter uses; Described data statistics module obtains the identity information of the experiment information of described analysis module acquisition and the experimenter of correspondence as raw data, and many parts of these raw data are added up, to obtain the statistics of the statistics of the experimental assessment situation of the student of each age level, the statistics of experimental assessment situation of male and female students, the statistics of the experimental assessment situation of the student of each department, the statistics of experimental assessment situation of the student of each school and the experimental assessment situation of the student of each teacher.
Preferably, described examination terminal is connected with described storage server, and has described predetermined right and can read in described storage server the described vision signal stored, for described analysis module analysis and examination.Alternatively, described examination terminal is connected with the input port of described monitor, receives the described vision signal that described acquisition terminal outputs to described monitor, for described analysis module analysis and examination.
Preferably, described acquisition terminal also comprises control module, and described control module controls described acquisition terminal start and stop according to the instruction of central server and gathers described video image.
Preferably, the number of the described camera of described each acquisition terminal is two, is arranged at two relative positions of described laboratory table respectively.
Present invention also offers a kind of process management method for above-mentioned experimental assessment system, the control process of the operation for controlling described acquisition terminal is run in described control module, the bridging process of described control process creation, and the collection process of the collection for controlling described video image of described bridging process establishment, wherein, described control process creation also monitors named pipes, when described named pipes has message to write, described control process reads and processes described message, when the described collection running state of a process that described message comprises is for time abnormal, described control process terminates described bridging process, and the order terminating to gather is sent to described collection process, the message comprising described collection running state of a process is write described named pipes with predetermined very first time interval by described collection process, when receiving the order of the end collection that described control process sends, acquisition terminal described in described collection Process flowchart stops gathering described video image.
Further, described control module also runs clock, described clock to send the operation duration of described collection process according to the second predetermined time interval to described control process with interruption form, described operation duration and scheduled duration compare by described control process, if described operation duration is more than or equal to described scheduled duration, then terminate described bridging process, and send the order terminating to gather to described collection process.
Experimental assessment system of the present invention and process management method thereof, make to be convenient in teaching to observe, the experimentation of examination student, thus be convenient to the experimentation of teaching person to student and instruct, to improve the practical operative ability of student.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of experimental assessment system of the present invention;
Fig. 2 is the structural representation of the second embodiment of experimental assessment system of the present invention;
Fig. 3 is the schematic diagram of the process management method of experimental assessment system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, experimental assessment system of the present invention and process management method thereof are described in further detail, but not as a limitation of the invention.
As shown in Figure 1, the experimental assessment system for checking and rating the experimentation of experimenter of the present invention, comprises acquisition terminal and the storage server be connected with acquisition terminal respectively and monitor.Wherein, acquisition terminal comprises camera, and it gathers the video image of the experimentation of experimenter, and the vision signal with this video image is outputted to storage server and monitor by acquisition terminal respectively.The video image that acquisition terminal exports stores by storage server, reads for the user (such as evaluation staff) with predetermined right, thus realize non real-timely checking, playback, the function such as program request.The vision signal that acquisition terminal exports is play by monitor, and the experimentation by experimenter is broadcast live, to invigilate personnel or evaluation staff's real time inspection.
The existing live video image of this system, for invigilator or evaluation staff's real time inspection, this ensure that evaluation staff both can make some to the experimentation of experimenter and react timely, such as, to the process of handing in an examination paper in advance, to the process of fault, the process etc. to cheating; Simultaneously, this system also has the storage figure picture stored in the server, repeatedly watch for evaluation staff, experimentation can be reviewed, ensure that evaluation staff can not act hurriedly in a messy situation because of transient experimental phenomena, also can not lose the fairness of examination because of unobservable experimental detail, the problem of shortage of manpower can also be solved simultaneously.
As shown in the figure, the number of acquisition terminal can be multiple, and its number is determined by the number of experimenter to be checked and rated.Certainly, also can arrange an acquisition terminal in an examination hall, it is used for the experimentation of all experimenters gathered in this examination hall.But the present invention preferably, in an examination hall, multiple acquisition terminal is set, each acquisition terminal only gathers the vision signal of an experimenter, namely, each acquisition terminal is arranged near each laboratory table in examination hall respectively, with the video image of the experimentation of the experimenter of each laboratory table of acquisition operations.Based on these video images, to each experimenter, whether invigilator personnel can occur that monitoring is made in unlawful practice; Evaluation staff can learn whether each experimenter (such as, process that experimentally person completes certain experiment can have significantly to pause and judge whether it has doubt on some knowledge points the Grasping level of certain knowledge point that certain is tested; Or this experimenter can also be passed judgment on from the standardization of experimental implementation and whether really grasp this experimental technique etc.), thus can learn which knowledge point or experimental technique need emphasis to impart knowledge to students, could teaching process be improved, improve the teaching level of experimental courses.
Preferably, with reference to Fig. 2, each acquisition terminal comprises two cameras, and two cameras are arranged at two relative positions of laboratory table respectively, to invigilate the behavior of personnel or evaluation staff observation experiment person all sidedly.For the ease of installation and maintenance, acquisition terminal can adopt embedded device, is namely carried out the collection of video image by a master chip band two cameras.Camera can adopt small-sized USB camera, takes up room so little, also can avoid bringing psychological pressure to experimenter.
In order to obtain video image clearly, the camera of acquisition terminal preferably uses high-definition camera, and such as, the video image of acquisition stream media yuv format, with the demand making the sharpness of the video image gathered meet system.But thing followed problem is, the resolution of video image is larger, sharpness is higher, and the code stream of its transmission will be more, and network bandwidth pressure is also larger, but the network bandwidth has in limited time, can cause obstacle to the on-the-spot broadcasting of test situation; And for needing the storage server of stored video signal, the increase of data traffic, just means that the demand of storage space becomes large, adds hardware cost and handling cost.Therefore, while pursuit high image quality, the pressure that the network bandwidth and storage space are brought to also be considered.
In order to solve the problem, continue with reference to Fig. 1, acquisition terminal also comprises scrambler, and the video image of camera collection is formed as vision signal after encoder encodes.Scrambler encodes to obtain the first vision signal to video image with the first coded system, and the first vision signal is outputted to storage server and stores by acquisition terminal.Meanwhile, scrambler encodes to obtain the second vision signal to video image with the second coded system, and the second vision signal is outputted to monitor and plays by acquisition terminal.
So, experimental assessment system of the present invention employs dual code stream technology, namely in acquisition terminal simultaneously and deposit two kinds of code streams.Adopt two kinds of forms to encode respectively by scrambler to realize, a kind of code stream is used for Internet Transmission, another kind of code stream is used for the real-time storage of high-quality, taken into account the problem of local storage and telecommunication network transmission simultaneously, solve the bottleneck problem of Internet Transmission, two kinds of coded systems can be selected flexibly according to the network bandwidth, namely select the size of code stream, allow high definition store and realize with real-time broadcasting simultaneously.
Preferably, for data store the first coded system for H.264 to encode, the second coded system for network direct broadcasting be MPEG4 encode.
In order to automatically check and rate the experimentation of experimenter, further, experimental assessment system of the present invention can also comprise examination terminal, and this examination terminal comprises interconnective analysis module and data statistics module.The experimentation of the experimenter in the vision signal of the experimentation of analysis module analysis wherein and examination reaction experiment person, the experiment information of the resource that the whether correct and experiment of consuming time with the experiment obtaining this experimenter, experimental procedure, each step operation uses etc.(identity information of experimenter can be that central server is handed down to each examination terminal to the identity information of the experimenter of these experiment informations that data statistics module acquisition analysis module obtains and correspondence, comprise examination point information, examination hall information, examinee information etc.) as raw data, and many parts of these raw data of multiple experimenter are added up, to obtain the statistics that some contribute to teaching outcome evaluation and educational mode improvement, such as, the statistics of the experimental assessment situation of the student of each age level and contrast, the statistics of the experimental assessment situation of male and female students and contrast, the statistics of the experimental assessment situation of the student of each department and contrast, the statistics of the experimental assessment situation of the student of each school and contrast, and the experimental assessment situation of the student of each teacher (such as, Experimental Standardization etc.) statistics and contrast etc.By the statistics and analysis of these data, contribute to the improvement to level of experiment teaching and lifting.
In order to make examination terminal to obtain vision signal, with reference to Fig. 1, examination terminal is connected with storage server, and has predetermined right and can read the vision signal stored in storage server, for analysis module analysis and examination.Alternatively, with reference to Fig. 2, examination terminal is connected with the input port of monitor, receives the vision signal that acquisition terminal outputs to monitor, for analysis module analysis and examination.
In order to ensure the fairness of practical exam, require that experimenters all in same examination hall must start simultaneously, terminate simultaneously.Once occur abnormal, must dispose fast, restarting of such as acquisition terminal.Therefore, acquisition terminal also comprises control module (not shown), and control module controls acquisition terminal start and stop according to the instruction of central server and gathers video image, and control acquisition terminal restarts when acquisition terminal occurs abnormal.
Therefore, acquisition terminal, when the instruction accepting central server, must grasp the operation conditions that Streaming Media gathers process at any time.And need continuity, high CPU usage during Streaming Media collection process collection video.If it is unfavorable to dispatch between process, system starts rear continuous collecting video at every turn, and collection process probably can become zombie.Therefore, control process needs a kind of mechanism and communicates efficiently and stably with Streaming Media collection process at any time.
With reference to Fig. 3, present invention also offers a kind of process management method for above-mentioned experimental assessment system, wherein, the collection process of the collection for controlling video image that the control process of the operation for controlling acquisition terminal, the bridging process of this control process creation and this bridging process create is run in control module.
Control process creation and monitor named pipes, when named pipes has message to write, control process reads and processes this message, when the collection running state of a process that message comprises is for time abnormal, control process terminates bridging process, and sends the order terminating to gather to the process of collection.On the other hand, collection process with predetermined very first time interval (such as, the message write named pipes gathering running state of a process will be comprised in real time), when receiving the order of the end collection that control process sends, gathering Process flowchart acquisition terminal and stopping gathering video image.
Further, control module also runs clock, clock to send the operation duration of collection process according to the second predetermined time interval to the process of control with the form of interruption, operation duration and scheduled duration compare by control process, if run duration to be more than or equal to scheduled duration, then terminate bridging process, and send the order terminating to gather to the process of collection.Here bridging process (subprocess) is used to create collection process (Sun Jincheng), once the process of control (parent process) detects the abnormality that Sun Jincheng sends, just horse back KILL subprocess.And Sun Jincheng is because without parent process, its residual resource taken and process kernel etc. will by operating system nucleus automatic drawing backs.Ensure that embedded device (acquisition terminal) does not have the existence of zombie process, thus embedded device can be taken an examination 20 continuously in not next sky of powering-off state also can not produce internal memory to overflow.
The present invention adopts the mode of tick interrupt and named pipes superposition synchronous to what realize between control process and collection process.By this mechanism, before making every to take an examination, the performance of embedded device is the most stable, and the occupancy of internal memory and CPU is all minimum, resource is used to collection process to greatest extent, makes the image quality of final video image high as much as possible.
Above embodiment is only illustrative embodiments of the present invention, can not be used for limiting the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can in essence of the present invention and protection domain, and make various amendment or equivalent replacement to the present invention, these are revised or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (10)
1. an experimental assessment system, for checking and rating the experimentation of experimenter, is characterized in that, comprises acquisition terminal and the storage server be connected with described acquisition terminal respectively and monitor, wherein,
Described acquisition terminal comprises camera, the video image of the experimentation of described camera collection experimenter, and the vision signal with described video image is outputted to described storage server and described monitor by described acquisition terminal respectively;
Described vision signal stores by described storage server, reads for the user with predetermined right;
Described vision signal is play by described monitor.
2. experimental assessment system according to claim 1, is characterized in that, described acquisition terminal also comprises scrambler, and the described video image of described camera collection is formed as described vision signal after described encoder encodes, wherein,
Described scrambler encodes to obtain the first vision signal to described video image with the first coded system, and described first vision signal is outputted to described storage server by described acquisition terminal; And
Described scrambler encodes to obtain the second vision signal to described video image with the second coded system, and described second vision signal is outputted to described monitor by described acquisition terminal.
3. experimental assessment system according to claim 1, it is characterized in that, the number of described acquisition terminal is multiple, and each described acquisition terminal is arranged near each laboratory table in examination hall respectively, with the video image of the experimentation of the experimenter of laboratory table each described in acquisition operations.
4. experimental assessment system according to claim 1, is characterized in that, this system also comprises examination terminal, and described examination terminal comprises interconnective analysis module and data statistics module, wherein,
Described analysis module analysis and check and rate the experimentation of experimenter in described vision signal, the experiment information of the resource that the whether correct and experiment of consuming time with the experiment obtaining this experimenter, experimental procedure, each step operation uses;
Described data statistics module obtains the identity information of the experiment information of described analysis module acquisition and the experimenter of correspondence as raw data, and many parts of these raw data are added up, to obtain the statistics of the statistics of the experimental assessment situation of the student of each age level, the statistics of experimental assessment situation of male and female students, the statistics of the experimental assessment situation of the student of each department, the statistics of experimental assessment situation of the student of each school and the experimental assessment situation of the student of each teacher.
5. experimental assessment system according to claim 4, it is characterized in that, described examination terminal is connected with described storage server, and has described predetermined right and can read in described storage server the described vision signal stored, for described analysis module analysis and examination.
6. experimental assessment system according to claim 4, it is characterized in that, described examination terminal is connected with the input port of described monitor, receives the described vision signal that described acquisition terminal outputs to described monitor, for described analysis module analysis and examination.
7. experimental assessment system according to claim 1, is characterized in that, described acquisition terminal also comprises control module, and described control module controls described acquisition terminal start and stop according to the instruction of central server and gathers described video image.
8. experimental assessment system according to claim 3, is characterized in that, the number of the described camera of described each acquisition terminal is two, is arranged at two relative positions of described laboratory table respectively.
9. the process management method for experimental assessment system according to claim 7, it is characterized in that, the collection process of the collection for controlling described video image that the control process of the operation for controlling described acquisition terminal, the bridging process of described control process creation and described bridging process create is run in described control module, wherein
Described control process creation also monitors named pipes, when described named pipes has message to write, described control process reads and processes described message, when the described collection running state of a process that described message comprises is for time abnormal, described control process terminates described bridging process, and sends the order terminating to gather to described collection process;
The message comprising described collection running state of a process is write described named pipes with predetermined very first time interval by described collection process, when receiving the order of the end collection that described control process sends, acquisition terminal described in described collection Process flowchart stops gathering described video image.
10. process management method according to claim 9, it is characterized in that, described control module also runs clock, described clock to send the operation duration of described collection process according to the second predetermined time interval to described control process with interruption form, described operation duration and scheduled duration compare by described control process, if described operation duration is more than or equal to described scheduled duration, then terminate described bridging process, and send the order terminating to gather to described collection process.
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| CN109727172A (en) * | 2019-03-18 | 2019-05-07 | 上海中科教育装备集团有限公司 | A kind of artificial intelligence machine study experimental skill points-scoring system |
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