CN111833689B

CN111833689B - Grading method and device for electrical experiment

Info

Publication number: CN111833689B
Application number: CN201910319758.4A
Authority: CN
Inventors: 吕瑞
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2022-08-02
Anticipated expiration: 2039-04-19
Also published as: CN111833689A; CN112037613A; CN112037613B

Abstract

The application relates to a scoring method and a scoring device for an electrical experiment, and belongs to the field of video monitoring. The method comprises the following steps: the method comprises the steps of obtaining a video picture shot for a circuit, wherein the circuit comprises a plurality of instruments, the instruments are connected through conducting wires, wiring ends at two ends of the conducting wires are provided with labels, the labels at two ends of the conducting wires are the same, and the label on each conducting wire is different; identifying instrument images of instruments included in the circuit and terminal images and label images of terminals from the video pictures; generating a circuit diagram of the circuit according to the instrument image of the instrument, the terminal image of the terminal and the label image; and scoring the circuit according to the circuit diagram of the circuit. The method and the device can improve the circuit scoring efficiency.

Description

Grading method and device for electrical experiment

Technical Field

The application relates to the field of video monitoring, in particular to a scoring method and a scoring device for an electrical experiment.

Background

Physics is a course of middle school education, physical experiments are an important teaching content of physical teaching, and electrical experiments are an important teaching content of physical experiments. When students do electricity experiments, different instruments such as a power supply, a resistor, an electric bulb, a switch, a voltmeter, an ammeter, a sliding resistor and the like are connected together by using a lead to form a circuit.

After the student is connected out of the circuit, the teacher detects the connection relation among all instruments in the circuit, and the circuit is scored according to the detection result. The efficiency of scoring the circuit is low because a teacher is required to manually detect the connection relationship between each instrument in the circuit at present.

Disclosure of Invention

The embodiment of the application provides a scoring method and a scoring device for an electrical experiment, so that the efficiency of scoring a circuit is improved. The technical scheme is as follows:

in one aspect, the present application provides a scoring method for an electrical experiment, the method comprising:

the method comprises the steps of obtaining a video picture shot for a circuit, wherein the circuit comprises a plurality of instruments, the instruments are connected through conducting wires, wiring ends at two ends of the conducting wires are provided with labels, the labels at two ends of the conducting wires are the same, and the label on each conducting wire is different;

identifying instrument images of instruments included in the circuit and terminal images and label images of terminals from the video pictures;

generating a circuit diagram of the circuit according to the instrument image of the instrument, the terminal image of the terminal and the label image;

and scoring the circuit according to the circuit diagram of the circuit.

Optionally, the generating a circuit diagram of the circuit according to the instrument image of the instrument, the terminal image of the terminal, and the label image includes:

determining a terminal connected with a terminal of the instrument according to the instrument image and the terminal image;

determining the connection relation between the binding posts of each instrument in the circuit according to the label images of the binding posts connected with the binding posts of the instruments;

and generating a circuit diagram of the circuit according to the connection relationship between the binding posts of the instruments in the circuit.

Optionally, the determining, according to the instrument image and the terminal image, a terminal connected to a terminal of the instrument includes:

determining a first detection frame comprising a terminal in the instrument image, and determining a second detection frame comprising a terminal in the terminal image;

and when the first detection frame is overlapped with the second detection frame, determining that the binding post of the instrument corresponding to the instrument image is connected with the binding post corresponding to the binding post image.

Optionally, the determining a connection relationship between the instruments in the circuit according to the label image of the terminal connected to the instrument includes:

determining that a connection relationship exists between a terminal of a first instrument and a terminal of a second instrument when a label image of a terminal connected to a terminal of the first instrument is the same as a label image of a terminal connected to a terminal of the second instrument, the first instrument and the second instrument being two different instruments in the circuit.

Optionally, the scoring the circuit according to the circuit diagram of the circuit includes:

searching along a line connected with one pole of a power supply in the circuit diagram, recording the polarity of each wiring terminal connection of the instrument when the instrument in the circuit diagram is searched, and recording the intersection point when the intersection point of a plurality of lines is searched;

when the other pole of the power supply is searched, determining that the circuit diagram forms a loop, dividing the circuit diagram into at least one section of line according to the recorded intersection points, determining that the connection mode of all instruments on the same section of line is serial connection, and connecting a plurality of sections of lines with the same intersection points at two ends in parallel;

and acquiring the fraction of the circuit according to the recorded polarity of each binding post connection of each instrument, the connection mode of each instrument and the at least one section of circuit.

In another aspect, the present application provides a scoring device for an electrical experiment, the device comprising:

the circuit comprises a plurality of instruments, wherein the instruments are connected through a wire, the wiring ends at two ends of the wire are provided with labels, the labels at two ends of the wire are the same, and the label on each wire is different;

the identification module is used for identifying an instrument image of an instrument included in the circuit and a terminal image and a label image of a terminal from the video picture;

the generating module is used for generating a circuit diagram of the circuit according to an instrument image of the instrument, a terminal image of the terminal and a label image;

and the scoring module is used for scoring the circuit according to the circuit diagram of the circuit.

Optionally, the generating module includes:

the first determining unit is used for determining a terminal connected with a terminal of the instrument according to the instrument image and the terminal image;

the second determining unit is used for determining the connection relation between the binding posts of each instrument in the circuit according to the label images of the binding posts connected with the binding posts of the instruments;

and the generating unit is used for generating a circuit diagram of the circuit according to the connection relation between the binding posts of each instrument in the circuit.

Optionally, the first determining unit is configured to:

Optionally, the second determining unit is configured to:

Optionally, the scoring module includes:

the searching unit is used for searching along a line connected with one pole of a power supply in the circuit diagram, recording the polarity of connection of each binding post of the instrument when the instrument in the circuit diagram is searched, and recording an intersection point of a plurality of lines when the intersection point is searched;

the dividing unit is used for determining that the circuit diagram forms a loop when the other pole of the power supply is searched, dividing the circuit diagram into at least one section of line according to the recorded intersection point, determining that the connection mode of all instruments on the same section of line is serial connection, and connecting a plurality of sections of lines with the same intersection point at two ends in parallel;

and the acquisition unit is used for acquiring the fraction of the circuit according to the recorded polarity of each binding post connection of each instrument, the connection mode of each instrument and the at least one section of circuit.

In another aspect, the present application provides a non-transitory computer readable storage medium for storing a computer program which is loaded and executed by a processor to implement the instructions of the method of one aspect or any of the alternatives of one aspect.

In another aspect, the present application provides an electronic device comprising a processor and a memory,

the memory stores at least one instruction which is loaded by the processor and executes lines to implement instructions of any one of the optional methods of an aspect or aspect.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the labels are arranged on the wiring ends at the two ends of the conducting wires, the labels at the two ends of the conducting wires are the same, and the labels on each conducting wire are different, so that an instrument image of an instrument included in the circuit, a wiring end image of the wiring end and a label image are identified from a video picture, a circuit diagram of the circuit is generated according to the instrument image of the instrument, the wiring end image of the wiring end and the label image, the circuit can be scored based on the circuit diagram, and compared with the existing manual circuit scoring, the scoring effect can be improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic view of a conductive line structure provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of an instrument according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of a scoring method for an electrical experiment according to an embodiment of the present disclosure;

FIG. 4 is a flow chart of another electrical experiment scoring method provided in the embodiments of the present application;

fig. 5 is a schematic view of a video picture provided by an embodiment of the present application;

FIG. 6 is a circuit diagram provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a scoring device for an electrical experiment according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a terminal according to a fourth embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

In order to automatically identify the connection relationship between the instruments, a new set of wires and instruments for electrical experiments is designed in the embodiment. For the wire, the two ends of the wire are wiring ends, a label is arranged at each wiring end, the labels at the two ends of the same wire are the same, and the labels arranged on different wires are different. For the tags on each wire, the shape of the tags on each wire is the same, the content of the tags at two ends of the same wire is the same, but the content of the tags on different wires is different. The labels at the two ends of the wire can be indication boards with letter marks, the letters at the two ends of the same wire are the same, the letters of different wires are different, and the wire with the labels is beneficial to artificial intelligence algorithm recognition during actual use and can assist in automatically recognizing the connection relation of instruments through algorithms.

For example, referring to the first and second conductive wires 1 and 2 shown in fig. 1, both ends of the first conductive wire 1 are provided with terminals 11, a tag 12 is provided at each terminal 11, each terminal 11 is adjacent to its corresponding tag 12, and the two tags 12 have the same shape and are included the same content. The second conductive wire 2 is provided with terminals 21 at both ends thereof, a tag 22 is provided at each terminal 21, each terminal 21 is adjacent to its corresponding tag 22, and the two tags 22 have the same shape and are included in the same content. The shape of both tags 12 on the first conductor 1 and the shape of both tags 22 on the second conductor 2 are identical, but the two tags 12 on the first conductor 1 comprise AAAA and the two tags 22 on the second conductor 2 comprise BBBB, so that the tags 12 on the first conductor 1 and the tags 22 on the second conductor 2 are different.

For each instrument, two binding posts are arranged on each instrument, and the color of the base of each instrument is a preset color. The instrument may be a power supply, a resistor, a switch, a light bulb, a slide rheostat, a current meter, a voltage meter, etc. For example, referring to fig. 2, for the power supply 3, two vertically upward terminals 32 are provided on a base 31 of the power supply 3, and the base of the power supply 3 is a first color. For the switch 4, two vertically upward terminals 42 are arranged on a base 41 of the switch 4, and the base color of the switch 4 is a first color. For the bulb 5, two vertically upward terminals 52 are arranged on a base 51 of the bulb 5, and the base color of the bulb 5 is a first color. For the resistor 6, two terminals 62 are arranged on a base 61 of the resistor 6 in a vertical direction, and the base of the resistor 6 is in a first color. For the slide rheostat 7, the bottom terminal 71 of the slide rheostat 7 is vertically upward, the top terminal 72 is horizontal, and the base color is the first color. For the ammeter 8, two vertically upward terminals 82 are arranged on a base 81 of the ammeter 8, the color of the shell of the ammeter 8 is a first color, and the color of the base of the ammeter 8 is a second color. For the voltmeter 9, two vertical upward terminals 92 are arranged on a base 91 of the voltmeter 9, the color of the housing of the voltmeter 9 is a first color, and the color of the base of the voltmeter 9 is a third color.

The first color can be orange, and the shells of all the instruments are in striking orange, so that the instruments can be accurately positioned and identified by an artificial intelligence algorithm, and powerful support is provided for intelligent evaluation; the second color can be blue, and the third color can be red, so that the discrimination of the ammeter 8 and the voltmeter 9 is improved, and the ammeter and the voltmeter can be accurately identified by the artificial intelligence algorithm. Based on the design, various instruments and the connection relation among the instruments can be automatically detected and identified through an artificial intelligence algorithm, and finally, a powerful support is provided for automatic scoring of the actual electrical experiment.

Referring to fig. 3, an embodiment of the present application provides a scoring method for an electrical experiment, the method including:

step 301: the method comprises the steps of obtaining video pictures shot by a circuit, wherein the circuit comprises a plurality of instruments, the instruments are connected through conducting wires, the wiring ends at two ends of each conducting wire are provided with labels, the labels at two ends of each conducting wire are the same, and the labels on each conducting wire are different.

Step 302: and identifying instrument images of instruments included in the circuit and terminal images and label images of the terminals from the video pictures.

Step 303: a circuit diagram of the circuit is generated based on the instrument image of the instrument, the terminal image of the terminal, and the label image.

Step 304: the circuit is scored according to its circuit diagram.

In the embodiment of the application, the labels are arranged on the wiring terminals at two ends of the conducting wires, the labels at two ends of the conducting wires are the same, and the labels on each conducting wire are different, so that an instrument image of an instrument and a wiring terminal image and a label image of the wiring terminal included in a circuit are identified from a video picture, a circuit diagram of the circuit is generated according to the instrument image of the instrument, the wiring terminal image of the wiring terminal and the label image, the circuit can be scored based on the circuit diagram, and compared with the existing manual scoring of the circuit, the scoring effect can be improved.

Referring to fig. 4, an embodiment of the present application provides an electrically implemented scoring method, including:

step 401: the method comprises the steps of obtaining a video picture shot by a circuit, wherein the circuit comprises a plurality of instruments, the instruments are connected through conducting wires, the wiring ends at two ends of each conducting wire are provided with labels, the labels at two ends of each conducting wire are the same, and the labels on each conducting wire in the circuit are different.

The execution main body of the embodiment can be a terminal or a camera, and when the execution main body is the camera, the camera can shoot the circuit to obtain a video picture. When the execution subject is a terminal, the terminal is connected with the camera, and the terminal can acquire a video picture of the circuit shot by the camera from the camera.

The video pictures taken include instrument images of each instrument in the circuit and lead images of each lead, and the lead images of the leads include terminal images and label images of two ends of the leads.

For example, see fig. 5 for a video picture taken of a circuit, which includes an image of the electrical source 3, an image of the switch 4, an image of the light bulb 5, an image of the current meter 8, an image of the voltage meter 9, and images of the

wires

101, 102, 103, 104, 105, and 106. The two ends of each wire image are a terminal image and a label image, and the label images at the two ends of each wire image are the same. For example, for the wire image 101, the label images at both ends of the wire image 101 are both indicators of the letter "AA".

Step 402: and identifying instrument images of instruments included in the circuit and terminal images and label images of the terminals from the video pictures.

In this step, the video picture is input to a target image detection model, so that the target image detection model detects the video picture, and detects an instrument image of each instrument included in the video picture, and a terminal image and a tag image of each terminal included in the video picture.

For example, for the video picture shown in fig. 5, the video picture is input to a target image detection model that can detect the power supply image 3, the switch image 4, the bulb image 5, the ammeter image 8, the voltmeter image 9 included in the video picture shown in fig. 5; and detecting a terminal image and a tag image at both ends of each of the

conductive wires

101, 102, 103, 104, 105, and 106.

A plurality of first sample pictures can be obtained in advance, wherein each first sample picture comprises an instrument image of at least one instrument and/or a terminal image and a label image of two ends of each wire in at least one wire. The technician may mark the name of each image in each first sample picture to obtain a second sample picture. And inputting each second sample picture into the convolutional neural network, and training the convolutional neural network according to each second sample picture to obtain a target image detection model.

The first sample picture includes an instrument image of the instrument and/or a terminal image and a label image of terminals at both ends of the wire. The name of the instrument image mark to the instrument in the first sample picture is the name of the instrument, for example, the name of the power source image mark to the power source in the first sample picture may be the power source, the name of the resistance image mark to the resistance may be the resistance, the name of the switch image mark to the switch may be the switch, the name of the bulb image mark to the bulb may be the bulb, the name of the image mark to the slide rheostat may be the slide resistor, the name of the terminal image mark to the terminal may be the terminal, and the name of the tag image mark to the tag may be the tag.

Step 403: and determining the terminals connected with the terminals of each instrument in the circuit according to the instrument image and the terminal image included in the video picture.

Each instrument includes two posts, so the instrument image of each instrument includes a post image. In the step, for any instrument image and any terminal image in the video picture, determining a first detection frame comprising the terminal by performing target detection on the terminal in the instrument image, and determining a second detection frame comprising the terminal by performing target detection on the terminal in the terminal image; and when the first detection frame is overlapped with the second detection frame, determining that the binding post of the instrument corresponding to the instrument image is connected with the binding post corresponding to the binding post image. The first detection frame may be changed according to the position change of the post in the instrument image, and the second detection frame may be changed according to the position change of the post in the terminal image.

The target detection may be performed using a target image detection model or other target detection algorithms, which are not described in detail herein.

For example, in the video picture shown in fig. 5, the power supply image 3 includes two terminals on the left and right, the first detection frame including the right terminal m is determined by performing object detection on the right terminal m in the power supply image 3, object detection is performed on one terminal image n close to the power supply image 3 in the lead image 101 through a terminal in the terminal image n, the second detection frame including the terminal is determined, and the first detection frame and the second detection frame overlap, so that it can be determined that the right terminal of the power supply is connected to one terminal of the lead 101. It is determined in the same manner as described above that the left terminal of the power supply is connected to one terminal of the wire 106, the right terminal of the ammeter is connected to the other terminal of the wire 101 and one terminal of the wire 102, the left terminal of the ammeter is connected to one terminal of the wire 104, the right terminal of the voltmeter is connected to the other terminal of the wire 102, the left terminal of the voltmeter is connected to one terminal of the wire 103, the right terminal of the bulb is connected to the other terminal of the wire 104, the left terminal of the bulb is connected to the other terminal of the wire 103 and one terminal of the wire 105, the right terminal of the switch is connected to the other terminal of the wire 106, and the left terminal of the switch is connected to the other terminal of the wire 105.

Step 404: and determining the connection relation between the binding posts of each instrument in the circuit according to the label images of the binding posts connected with the binding posts of the instrument.

For the same wire, the labels at the two ends of the wire are the same, so that the label images at the two ends of the same wire in the video picture are the same.

In this step, it is determined that there is a connection relationship between the posts of the first instrument and the posts of the second instrument when the label image of the terminals connected to the posts of the first instrument and the label image of the terminals connected to the posts of the second instrument are the same, the first instrument and the second instrument being two different instruments in the circuit. It can be specifically determined that a connection relationship exists between one terminal of the first instrument and one terminal of the second instrument.

For example, in the video picture shown in fig. 5, connected to the right-side terminal of the power supply is one terminal of the wire 101, the label of which is a label having the letter "AA", connected to the right-side terminal of the ammeter are the other terminal of the wire 101 and one terminal of the wire 102, the label of the other terminal of the wire 101 is a label having the letter "AA", and the label of one terminal of the wire 102 is a label having the letter "BB". It can be determined that there is a connection relationship between the right side terminal of the power supply and the right side terminal of the ammeter.

According to the same mode, the fact that the connection relation exists between the right side binding post of the ammeter and the right side binding post of the voltmeter, the connection relation exists between the left side binding post of the voltmeter and the left side binding post of the bulb, the connection relation exists between the right side binding post of the bulb and the left side binding post of the ammeter, the connection relation exists between the left side binding post of the bulb and the left side binding post of the switch, and the connection relation exists between the right side binding post of the switch and the left side binding post of the power supply can be determined.

Step 405: and generating a circuit diagram of the circuit according to the connection relationship between the binding posts of the instruments in the circuit.

In this step, instrument symbols corresponding to the instruments are drawn according to the positions of the instrument images of the instruments in the video picture, and if a connection relationship exists between the binding post of the first instrument and the binding post of the second instrument, a connection line is drawn between the instrument symbol corresponding to the first instrument and the instrument symbol corresponding to the second instrument, so as to obtain a circuit diagram of the circuit.

When the left binding post of the first instrument and the left binding post of the second instrument have a connection relation, drawing a connecting line for connecting the left side of the instrument symbol corresponding to the first instrument and the left side of the instrument symbol corresponding to the second instrument. When the left binding post of the first instrument and the right binding post of the second instrument have a connection relation, drawing a connecting line for connecting the left side of the instrument symbol corresponding to the first instrument and the right side of the instrument symbol corresponding to the second instrument. And when the right binding post of the first instrument and the left binding post of the second instrument have a connection relation, drawing a connecting line for connecting the right side of the instrument symbol corresponding to the first instrument and the left side of the instrument symbol corresponding to the second instrument. And when the right binding post of the first instrument and the right binding post of the second instrument have a connection relation, drawing a connecting line for connecting the right side of the instrument symbol corresponding to the first instrument and the right side of the instrument symbol corresponding to the second instrument.

Referring to fig. 2, the positive electrode of the power supply 3 is different from the negative electrode, so that the two sides of the power supply image are different, and one side of the power supply image positioned at the positive electrode is provided with one more positive contact terminal image 33 than one side positioned at the negative electrode. When the target image detection model detects the electric source image 3, the positive contact terminal image 33 in the electric source image 3 can also be detected. Thus, when drawing the circuit diagram, the positive and negative polarities of the power source can be marked on both sides of the power source symbol in the circuit diagram according to the position of the positive contact terminal image 33 in the power source image 3.

For example, referring to fig. 6, the power source symbol 33, the switch symbol 43, the lamp symbol 53, the ammeter symbol 83, and the voltmeter symbol 93 are drawn according to the positions of the power source image 3, the switch image 4, the lamp image 5, the ammeter image 8, and the voltmeter image 9 in the video picture shown in fig. 5. Since there is a connection relationship between the right side post of the power supply and the right side post of the ammeter, a connection line is drawn between the right side of the power supply symbol 33 and the right side of the ammeter symbol 83; since a connection relationship exists between the right terminal of the ammeter and the right terminal of the voltmeter, a connection line is drawn between the right side of the ammeter symbol 83 and the right side of the voltmeter symbol 93; since there is a connection relationship between the left terminal of the voltmeter and the left terminal of the bulb, a connection line is drawn between the left side of the voltmeter symbol 93 and the left side of the bulb symbol 53; since there is a connection relationship between the right side terminal of the bulb and the left side terminal of the ammeter, a connection line is drawn between the right side of the bulb symbol 53 and the left side of the ammeter symbol 83; since there is a connection relationship between the left terminal of the bulb and the left terminal of the switch, a connection line is drawn between the left side of the bulb symbol 53 and the left side of the switch symbol 43; since there is a connection relationship between the right terminal of the switch and the left terminal of the power supply, a connection line is drawn between the right side of the switch symbol 43 and the left side of the power supply symbol 33, resulting in a circuit diagram as shown in fig. 6.

Referring to fig. 5, in the power supply image 3, the positive contact terminal image is located in the power supply image 3, and in the circuit diagram shown in fig. 6, the positive electrode "+" of the power supply is marked on the right side of the power supply symbol 33, and the negative electrode "-" of the power supply is marked on the left side of the power supply symbol 33.

Step 406: the circuit is scored according to its circuit diagram.

This step can be realized by the following steps 4061 to 4063:

4061: in the circuit diagram, a search is made along a line connected to one pole of the power source, the polarity of each terminal connection of the instrument is recorded when the instrument in the circuit diagram is searched, and the intersection point of a plurality of lines is recorded when the intersection point is searched, and the circuit diagram is determined to constitute a loop when the other pole of the power source is searched.

For example, in the circuit diagram shown in fig. 6, since the circuit diagram shown in fig. 6 is drawn by the execution main body of the embodiment, the execution main body can identify each line, instrument, power supply, and positive and negative poles in the circuit diagram, so that after the positive and negative poles of each line, instrument, and power supply in the circuit diagram are identified, a search is performed along the line connected to the positive pole of the power supply 33, when the intersection point F is found, the intersection point F is recorded, the search is continued for the ammeter 83 and the voltmeter 93, and the polarity connected to the right terminal (positive terminal) of the ammeter 83 is recorded as the positive pole, and the polarity connected to the left terminal (negative terminal) of the ammeter 83 is recorded as the negative pole; recording the polarity connected with a right terminal (a positive terminal) of the voltmeter 93 as a positive electrode, and the polarity connected with a left terminal (a negative terminal) as a negative electrode; it should be noted that, since the right terminal of the ammeter 83 is connected to the positive terminal of the power supply 33, the right terminal of the voltmeter 93 is connected to the positive terminal of the power supply 33, and the search is performed along the line from the positive terminal of the power supply 33, the right terminal of the ammeter 83 and the right terminal of the voltmeter 93 are searched first, the polarity of the connection of the right terminal of the ammeter 83 can be set as the positive terminal, the polarity of the connection of the left terminal of the ammeter 83 is set as the negative terminal, the polarity of the connection of the right terminal of the voltmeter 93 is set as the positive terminal, and the polarity of the connection of the left terminal of the voltmeter 93 is set as the negative terminal. The polarity setting of the connection of the terminals of the other devices will not be described in detail.

When the bulb 53 is searched, recording the polarity of the left terminal connection and the polarity of the right terminal connection of the bulb 53; when the intersection point E is found, the intersection point E is recorded, the switch 43 is continuously found, the polarity of the left terminal connection and the polarity of the right terminal connection of the switch 43 are recorded, the negative electrode of the power supply 33 is continuously found, and it is determined that the circuit diagram shown in fig. 6 constitutes a loop.

4062: dividing the circuit diagram into at least one section of line according to the recorded intersection points, determining the connection mode of each instrument on the same section of line as series connection, and connecting a plurality of sections of lines with the same intersection points at two ends in parallel.

For example, the circuit diagram shown in fig. 6 is divided into three lines, which are a line 1 composed of a voltmeter 93, a line 2 composed of an ammeter 83 and a bulb 53, a line 3 composed of a switch 43 and a power supply 33, according to the recorded intersections E and F, wherein the line 1 and the line 2 are connected in parallel, and are connected in series with the ammeter 83 and the bulb 53 on the line 2, and the switch 43 and the power supply 33 on the line 3.

4063: and acquiring the fraction of the circuit according to the recorded polarity of each binding post connection of each instrument, the connection mode of each instrument and the at least one section of line.

In this circuit diagram, both terminals of the power supply are connected in the circuit, increasing the fraction of the circuit. And if the polarity of the connection of the positive terminal of the ammeter is positive, the polarity of the connection of the negative terminal is negative, and the connection mode of the ammeter is series connection, the fraction of the circuit is increased.

And determining a first circuit in which the voltmeter is located, if only the voltmeter is arranged on the first circuit, the first circuit is connected with at least one section of second circuit in parallel, instruments on each second circuit comprise at least one of a resistor and a bulb, the polarity of the positive terminal connection of the voltmeter is a positive pole, the polarity of the negative terminal connection of the voltmeter is a negative pole, and the fraction of the circuit is increased.

When the circuit diagram is determined to form a loop for the first time, whether the switch is in an off state or not is judged according to the switch image corresponding to the switch, and if the switch is in the off state and two binding posts of the switch are both connected into the circuit, the fraction of the circuit is increased. Judging whether a slide sheet of the slide rheostat is at the maximum resistance position or not according to the slide rheostat image corresponding to the slide rheostat, and if the slide rheostat is at the maximum resistance position, increasing the fraction of a circuit; and determining whether an upper terminal and a lower terminal of the sliding rheostat are connected to the circuit according to the sliding rheostat image, and increasing the fraction of the circuit if the upper terminal and the lower terminal of the sliding rheostat are connected to the circuit.

Optionally, the slide rheostat includes a resistor and a slider, so the slide rheostat image includes a resistor image and a slider image, and if it is determined in step 404 that an upper terminal post of the slide rheostat is connected to the other instrument and a lower terminal post of the slide rheostat is connected to the other instrument, an upper terminal post and a lower terminal post of the slide rheostat are determined to be connected to the circuit. And then identifying the lower post image and the sliding sheet image from the slide rheostat, and if the sliding sheet image is positioned at one end of the resistance image far away from the lower post image, judging that the sliding sheet of the slide rheostat is at the position of maximum resistance.

In the embodiment of the application, the conducting wire with the label is arranged in advance, the label is the signboard with the letter indication, image recognition can be facilitated, due to the fact that labels at two ends of the conducting wire are the same, the label on each conducting wire is different, the instrument image of the instrument, the terminal image of the terminal and the label image of the circuit are recognized from the video picture, the instrument with the connection relation can be recognized based on the label images at the two ends of the conducting wire, then the circuit diagram of the circuit can be generated according to the connection relation among the instruments, grading of the circuit can be achieved based on the circuit diagram, and compared with the existing method that the circuit is graded manually, the grading effect can be improved.

The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

Fig. 7 is a scoring apparatus 700 for an electrical experiment according to an embodiment of the present application, where the apparatus 700 includes:

the acquisition module 701 is used for acquiring a video picture shot by a circuit, the circuit comprises a plurality of instruments, the instruments are connected through a wire, the wiring ends at two ends of the wire are provided with labels, the labels at two ends of the wire are the same, and the label on each wire is different;

an identifying module 702, configured to identify, from the video picture, an instrument image of an instrument included in the circuit, and a terminal image and a tag image of a terminal;

a generating module 703, configured to generate a circuit diagram of the circuit according to an instrument image of the instrument, a terminal image of the terminal, and a label image;

and a scoring module 704 for scoring the circuit according to the circuit diagram of the circuit.

Optionally, the generating module 703 includes:

Optionally, the first determining unit is configured to:

Optionally, the second determining unit is configured to:

Optionally, the scoring module 704 includes:

In the embodiment of the application, the wiring ends at the two ends of the conducting wires are provided with the labels, the labels at the two ends of the conducting wires are the same, and the labels on each conducting wire are different, so that the error-identification module identifies the instrument image of the instrument included by the circuit and the wiring end image and the label image of the wiring end from the video picture, the generation module generates the circuit diagram of the circuit according to the instrument image of the instrument, the wiring end image of the wiring end and the label image, and the scoring module can score the circuit based on the circuit diagram.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

Fig. 8 is a block diagram illustrating a terminal 800 according to an exemplary embodiment of the present invention. The terminal 800 may be a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like. The terminal 800 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.

In general, the terminal 800 includes: a processor 801 and a memory 802.

The processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The processor 801 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 801 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 801 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 801 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 802 may include one or more computer-readable storage media, which may be non-transitory. Memory 802 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 802 is used to store at least one instruction for execution by processor 801 to implement the scoring method for electrical experiments provided by the method embodiments herein.

In some embodiments, the terminal 800 may further include: a peripheral interface 803 and at least one peripheral. The processor 801, memory 802, and peripheral interface 803 may be connected by buses or signal lines. Various peripheral devices may be connected to peripheral interface 803 by a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 804, a touch screen display 805, a camera 806, an audio circuit 807, a positioning component 808, and a power supply 809.

The peripheral interface 803 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 801 and the memory 802. In some embodiments, the processor 801, memory 802, and peripheral interface 803 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 801, the memory 802, and the peripheral interface 803 may be implemented on separate chips or circuit boards, which are not limited by this embodiment.

The Radio Frequency circuit 804 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 804 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 804 converts an electrical signal into an electromagnetic signal to be transmitted, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 804 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuit 804 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, generations of mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 804 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display screen 805 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 805 is a touch display, the display 805 also has the ability to capture touch signals on or above the surface of the display 805. The touch signal may be input to the processor 801 as a control signal for processing. At this point, the display 805 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 805 may be one, providing the front panel of the terminal 800; in other embodiments, the display 805 may be at least two, respectively disposed on different surfaces of the terminal 800 or in a foldable design; in still other embodiments, the display 805 may be a flexible display disposed on a curved surface or a folded surface of the terminal 800. Even further, the display 805 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The Display 805 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 806 is used to capture images or video. Optionally, camera assembly 806 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 806 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 807 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 801 for processing or inputting the electric signals to the radio frequency circuit 804 to realize voice communication. The microphones may be provided in a plurality, respectively, at different portions of the terminal 800 for the purpose of stereo sound collection or noise reduction. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 801 or the radio frequency circuit 804 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, the audio circuitry 807 may also include a headphone jack.

The positioning component 808 is used to locate the current geographic position of the terminal 800 for navigation or LBS (Location Based Service). The Positioning component 808 may be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.

Power supply 809 is used to provide power to various components in terminal 800. The power supply 809 can be ac, dc, disposable or rechargeable. When the power supply 809 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, terminal 800 also includes one or more sensors 810. The one or more sensors 810 include, but are not limited to: acceleration sensor 811, gyro sensor 812, pressure sensor 813, fingerprint sensor 814, optical sensor 815 and proximity sensor 816.

The acceleration sensor 811 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 800. For example, the acceleration sensor 811 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 801 may control the touch screen 805 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 811. The acceleration sensor 811 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 812 may detect a body direction and a rotation angle of the terminal 800, and the gyro sensor 812 may cooperate with the acceleration sensor 811 to acquire a 3D motion of the user with respect to the terminal 800. From the data collected by the gyro sensor 812, the processor 801 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

Pressure sensors 813 may be disposed on the side bezel of terminal 800 and/or underneath touch display 805. When the pressure sensor 813 is disposed on the side frame of the terminal 800, the holding signal of the user to the terminal 800 can be detected, and the processor 801 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 813. When the pressure sensor 813 is disposed at a lower layer of the touch display screen 805, the processor 801 controls the operability control on the UI interface according to the pressure operation of the user on the touch display screen 805. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 814 is used for collecting a fingerprint of the user, and the processor 801 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 814, or the fingerprint sensor 814 identifies the identity of the user according to the collected fingerprint. Upon identifying the user as a trusted identity, the processor 801 authorizes the user to perform relevant sensitive operations, including unlocking the screen, viewing encrypted information, downloading software, paying for and changing settings, etc. Fingerprint sensor 814 may be disposed on the front, back, or side of terminal 800. When a physical button or a vendor Logo is provided on the terminal 800, the fingerprint sensor 814 may be integrated with the physical button or the vendor Logo.

The optical sensor 815 is used to collect the ambient light intensity. In one embodiment, the processor 801 may control the display brightness of the touch screen 805 based on the ambient light intensity collected by the optical sensor 815. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 805 is increased; when the ambient light intensity is low, the display brightness of the touch display 805 is turned down. In another embodiment, the processor 801 may also dynamically adjust the shooting parameters of the camera assembly 806 based on the ambient light intensity collected by the optical sensor 815.

A proximity sensor 816, also known as a distance sensor, is typically provided on the front panel of the terminal 800. The proximity sensor 816 is used to collect the distance between the user and the front surface of the terminal 800. In one embodiment, when the proximity sensor 816 detects that the distance between the user and the front surface of the terminal 800 gradually decreases, the processor 801 controls the touch display 805 to switch from the bright screen state to the dark screen state; when the proximity sensor 816 detects that the distance between the user and the front surface of the terminal 800 becomes gradually larger, the processor 801 controls the touch display 805 to switch from the screen-on state to the screen-on state.

Those skilled in the art will appreciate that the configuration shown in fig. 8 is not intended to be limiting of terminal 800 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A method of scoring an electrical experiment, the method comprising:

and scoring the circuit according to the circuit diagram of the circuit.

2. The method of claim 1, wherein said generating a circuit diagram of said circuit from an instrument image of said instrument, a terminal image of said terminal, and a label image comprises:

3. The method of claim 2, wherein said determining a terminal connected to a terminal of said instrument based on said instrument image and said terminal image comprises:

and when the first detection frame is overlapped with the second detection frame, determining that a binding post of an instrument corresponding to the instrument image is connected with a binding post corresponding to the binding post image.

4. The method of claim 2 or 3, wherein determining the connection relationship between the instruments in the circuit based on the label images of the terminals connected to the instruments comprises:

5. The method of claim 1, wherein scoring the circuit according to the circuit diagram of the circuit comprises:

6. A scoring device for an electrical experiment, the device comprising:

the circuit comprises a plurality of instruments, wherein the instruments are connected through wires, the wiring ends at two ends of each wire are provided with labels, the labels at two ends of each wire are the same, and the label on each wire is different;

7. The apparatus of claim 6, wherein the generating module comprises:

8. The apparatus of claim 7, wherein the first determining unit is to:

9. The apparatus of claim 7 or 8, wherein the second determining unit is to:

10. The apparatus of claim 6, wherein the scoring module comprises:

11. An electronic device, comprising a processor and a memory,

the memory stores at least one instruction that is loaded and executed by the processor to implement the method of any of claims 1 to 5.