CN110264842B - Teaching system and method for deepening understanding of measurement principle of test line - Google Patents
Teaching system and method for deepening understanding of measurement principle of test line Download PDFInfo
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- CN110264842B CN110264842B CN201910576550.0A CN201910576550A CN110264842B CN 110264842 B CN110264842 B CN 110264842B CN 201910576550 A CN201910576550 A CN 201910576550A CN 110264842 B CN110264842 B CN 110264842B
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Abstract
The invention belongs to the field of teaching systems, and particularly relates to a teaching system and a teaching method for deepening understanding of a measuring principle of a test line. The teaching system and the teaching method can deepen the understanding of students on the measuring principle of the measuring element test line. The teaching system includes: testing a line measurement principle experiment box; a server; the user side comprises a data input module and a data display module, wherein the input module is used for students to input circuit parameter data, and the data comprises theoretical data calculated by the students according to known parameters in the test circuit and experimental data obtained by measurement; and the display module is used for displaying the theoretical and experimental circuit parameter data and the comparison result. The invention is helpful for improving the active thinking ability of students, and is not operated by passive machines according to the requirements of books, so that the students can deeply understand the measuring principle of the current test line, and the practical ability and the ability of independently analyzing and solving problems are improved.
Description
Technical Field
The invention belongs to the field of teaching systems, and particularly relates to a teaching system and a teaching method for deepening understanding of a measuring principle of a test line.
Background
The circuit experiment is a professional basic experiment of electronic information students in colleges and universities and vocational schools, the experiment contents relate to the use of basic electronic instruments, the verification of basic circuit theorems, the observation of basic circuit phenomena and the like, and the experiment aims to help the students improve the practical ability and digest and understand the theoretical contents. The most basic operation in circuit experiments is to measure branch voltage and current. The method for measuring the voltage is to connect a voltmeter and a tested branch in parallel, and the method for measuring the current is to connect an ammeter and the tested branch in series. These two most basic measurement methods, students are well understood in theoretical class, but many students are busy and disoriented once they are involved in actual measurement, and it is therefore necessary for them to consolidate these concepts in experimental operations.
In experimental operation, a common current measuring method is to use a current test wire, one end of which is connected to an ammeter, and the other end of which is inserted into a current socket in a branch. Because of the structures of the current socket and the current test wire, the current meter is connected in series into the branch circuit, and the current measurement test wire measurement principle experiment box is realized. The experimental box for realizing the measuring and testing line measuring principle of the current by the method has no problems, but in the experimental process, a plurality of students only mechanically operate and measure according to the requirements of experimental teaching materials, and although the measured data are correct, the students do not understand why the operation is needed and do not understand the principle of the measuring method. And the students do not carefully read the experimental instruction, directly measure the current by using a voltage measuring method, and connect the ammeter with the branch in parallel, so that the circuit structure is changed, and wrong data are measured. These show that students need to strengthen the ability of applying theory to reality, and the traditional teaching method does not achieve the expected experimental effect, so that students can deeply understand the principle of current testing.
In view of the above, there is a need to provide a solution to overcome or at least mitigate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
In order to solve the problems, the invention provides a teaching system and a teaching method for deepening understanding of the measuring principle of the test line of the measuring element, which can deepen understanding of students on the measuring principle of the test line of the measuring element.
The invention is realized by the following technical scheme:
a teaching system for deepening understanding of a measurement principle of a test line, the teaching system comprising:
the test line measurement principle experiment box comprises a plurality of electronic elements, the electronic elements form a test circuit through a plurality of branches, the test circuit comprises a plurality of current/voltage sockets, and students perform circuit parameter measurement experiments on the test circuit by adopting current/voltage test lines on a current/voltage meter;
the server is used for storing circuit parameter theoretical data and experimental data, comparing the theoretical data with the experimental data and transmitting a comparison result to the user side;
the user terminal comprises a data input module and a data display module,
the input module is used for students to input circuit parameter data, and the data comprises theoretical data calculated by the students according to known parameters in the test circuit and experimental data obtained by measurement;
and the display module is used for displaying the theoretical and experimental circuit parameter data and the comparison result.
Further, the user side adopts a service APP;
the connection mode between the user side and the server is wireless or optical fiber.
Further, the test line measurement principle experiment box comprises one or more than two of a kirchhoff/superposition/homogeneity theorem verification experiment box, a thevenin/norton theorem verification experiment box, a single-phase alternating-current circuit element equivalent parameter determination experiment box, a three-phase alternating-current circuit voltage experiment box, a current measurement experiment box and a two-port network research.
Further, the input module is a keyboard.
Further, the server includes:
the main control module is used as a central control of the teaching system and used for realizing data exchange among modules in the server and between the server and the user side;
the comparison module is used for comparing the theoretical data and the experimental data input by the students, giving a comparison result and feeding the comparison result back to the main control module;
the data storage module is used for storing the theoretical data and the experimental data, the comparison result, the blank theoretical data table and the corresponding blank experimental data table which are input by the student;
the main control module is respectively connected with the comparison module and the data storage module.
Another object of the present invention is to provide a teaching method for deepening understanding of the measurement principle of a test line, the teaching method comprising:
s1, selecting a test circuit corresponding to the test line measurement principle experiment box on the user end to obtain a blank theoretical data table corresponding to the test circuit and a corresponding blank experimental data table;
s2, the student calculates theoretical data of the circuit parameters in the test circuit according to a circuit parameter calculation principle;
s3, under the premise that the user side does not show the measuring principle of the test line, the students measure the circuit parameters of the test circuit by themselves to obtain the experimental data;
s4, inputting the theoretical data obtained in S2 and the experimental data obtained in S3 by adopting the input module;
s5, the user end transmits the data in S4 to the server, and the server transmits the comparison result, the abnormal parameters in the comparison result and the corresponding test line measurement principle to the user end;
s6, the student determines the correct measuring mode according to the abnormal parameters shown by the user end and the corresponding measuring principle of the test line;
and S7, re-measuring the abnormal parameter part according to the correct measuring mode until the correct measured value is obtained.
Further, the teaching method further comprises the following steps: and S8, the server stores theoretical data and experimental data input by students and corresponding comparison results.
Further, the circuit parameters include: and testing the voltage value and the current value of each branch in the circuit.
Further, the range of deviation of each physical quantity in the abnormality parameters is set by a teacher on the server.
Furthermore, the teaching method can deepen the understanding of students on kirchhoff's theorem, superposition theorem and homogeneity theorem, effectively combines theory and practice, and perfects a learning network.
The invention at least has the following beneficial technical effects:
the invention is helpful for improving the active thinking ability of students, and is not operated by passive machines according to the requirements of books, so that the students can deeply understand the measuring principle of the current/voltage test line, and the practical ability and the ability of independent analysis and problem solving are improved.
Drawings
Fig. 1 is a schematic diagram of a circuit principle for verifying kirchhoff/superposition/homogeneity theorem in an embodiment of the present invention.
Fig. 2 is a schematic diagram of an internal structure of a current socket according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an equivalent circuit structure when the current plug is not inserted into the current socket according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a current plug in a current test line and a red-black terminal at the other end of the line in the embodiment of the invention.
FIG. 5 is a schematic diagram of an equivalent circuit structure using a current test line according to an embodiment of the present invention.
FIG. 6 is a schematic structural diagram of a method for testing an error current according to an embodiment of the present invention.
Fig. 7 is a flowchart illustrating a teaching method for deepening understanding of the measurement principle of the test line in the embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a teaching system for deepening understanding of the measurement principle of the test line in the embodiment of the present invention.
Fig. 9 is a schematic diagram of a server structure according to an embodiment of the present invention.
Description of reference numerals: 1-test line measurement principle experiment box; 2-an input module; 3-a display module; 4-server, 41-main control module, 42-comparison module, 43-data storage module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Fig. 1 is a schematic diagram of the circuit principle of kirchhoff/superposition/homogeneity theorem. In this experiment, students were asked to measure the voltage and current of each branch using test lines and to use the measurement data to verify kirchhoff/superposition/homogeneity theorem. In this circuit, the current I is measured in the measuring branch1、I2、I3According to the principle of a test box of a current measuring line measuring principle, corresponding branches need to be disconnected, and an ammeter needs to be connected in series. However, the relevant components in this circuit are already soldered on the test wire measurement principle test box, and a certain branch cannot be disconnected at will. In order to measure the current conveniently, a current socket is installed on a branch of the test wire measurement principle experiment box, and the current socket actually uses a common audio interface, and the internal structure of the current socket is shown in fig. 2.
When the current socket is not inserted with a plug, the inner spring pieces are mutually contacted and are equivalent to a conducting wire, and the current flowing cannot be hindered. Thus, when no current plug is inserted, the branch current I1、I2、I3The equivalent diagram of the three branches is shown in fig. 3.
The current socket needs to be matched with a current test wire for use. As shown in fig. 4, one end of the current test line is an audio plug (referred to herein as a current plug) having two contacts that are connected to the red and black terminals, respectively, on the other end of the current test line. In the using process, the red and black terminals of the current test wire are connected with the input terminal of the ammeter, and the current plug at the other end is inserted into the current socket on the test wire measurement principle experimental box. At the moment, the insertion of the current plug enables the spring piece inside the current socket to be squeezed open and to be respectively contacted with the two contacts of the current plug, so that the ammeter at the other end of the current test wire is respectively connected with the two contacts of the current socket, and the effect is to connect the ammeter in series to the branch circuit, thereby measuring the current of the branch circuit. The equivalent circuit is shown in fig. 5.
Thus, when the current plugs are respectively inserted into the three current sockets, the current meter/the voltage meter can be respectively connected in series/parallel to the three branches, so that the branch current/voltage can be conveniently measured.
In the teaching process, students are informed of the measuring principle and procedure of the test lines on the experimental instruction, and use the current/voltage test lines and the current/voltage sockets to measure the current/voltage. However, we have found in the teaching process that when these contents are provided directly to students, many students do not really understand the reasons behind them, but rather mechanically go to wire and measure and then record the data according to the procedure. The students do not want to carefully read the experimental instruction, and basically skip the description of the current testing step, and certainly want to directly connect the two ends of the ammeter to the branch resistor in parallel, so that the effect is to short circuit the resistor, change the circuit structure, and completely error the measured current, as shown in the structural schematic diagram of the erroneous current testing method shown in fig. 6.
In the error test method, the data measured by the students are wrong, but the students do not perceive the data by themselves, and the data are indicated by the teacher only after the data are checked by the teacher. Even if the students measure the correct data according to the correct steps, many students do not experience the convenience and necessity brought by the test method.
In view of the above problems, this embodiment provides a teaching method for deepening understanding of the measurement principle of the test line, and with reference to fig. 7, the teaching method includes:
s1, selecting a test circuit corresponding to the test line measurement principle experiment box on the user end to obtain a blank theoretical data table corresponding to the test circuit and a corresponding blank experimental data table;
s2, the student calculates theoretical data of the circuit parameters in the test circuit according to a circuit parameter calculation principle;
s3, under the premise that the user side does not show the measuring principle of the test line, the students measure the circuit parameters of the test circuit by themselves to obtain the experimental data;
s4, inputting the theoretical data obtained in S2 and the experimental data obtained in S3 by adopting the input module;
s5, the user end transmits the data in S4 to the server, and the server transmits the comparison result, the abnormal parameters in the comparison result and the corresponding test line measurement principle to the user end;
s6, the student determines the correct measuring mode according to the abnormal parameters shown by the user end and the corresponding measuring principle of the test line;
and S7, re-measuring the abnormal parameter part according to the correct measuring mode until the correct measured value is obtained.
In another embodiment, the teaching method further comprises: and S8, the server stores theoretical data and experimental data input by students and corresponding comparison results.
In this embodiment, the circuit parameters include: and testing the voltage value and the current value of each branch in the circuit.
In the present embodiment, the deviation range of each physical quantity in the abnormality parameter is set by a teacher.
In this example, the theoretical data table of the blank and the experimental data table of the blank are shown in table 1 below.
TABLE 1 blank theoretical data Table/blank Experimental data Table
In the embodiment, the teaching method is helpful for improving the ability of students to think actively, but not to operate passively and mechanically according to the requirements of books, so that the students can understand the measuring principle of the current/voltage test line more deeply, and the practical ability and the ability of independent analysis and problem solving are improved. Further deepens the understanding of students on kirchhoff theorem, superposition theorem and homogeneity theorem, effectively combines theory and practice, and perfects a learning network.
In another embodiment, a teaching system for enhancing understanding of the measurement principle of the test line is provided, as shown in fig. 8, the teaching system includes:
the test line measurement principle experiment box comprises a plurality of electronic elements, the electronic elements form a test circuit through a plurality of branches, the test circuit comprises a plurality of current/voltage sockets, and students perform circuit parameter measurement experiments on the test circuit by adopting current/voltage test lines on a current/voltage meter;
the server is used for storing circuit parameter theoretical data and experimental data, comparing the theoretical data with the experimental data and transmitting a comparison result to the user side;
the user terminal comprises a data input module and a data display module,
the input module is used for students to input circuit parameter data, and the data comprises theoretical data calculated by the students according to known parameters in the test circuit and experimental data obtained by measurement;
and the display module is used for displaying the theoretical and experimental circuit parameter data and the comparison result.
The user side adopts a service APP;
the connection mode between the user side and the server is wireless or optical fiber.
The test line measurement principle experiment box comprises one or more than two of a kirchhoff/superposition/homogeneity theorem verification experiment box, a Thevenin/Nuoton theorem verification experiment box, a single-phase alternating-current circuit element equivalent parameter determination experiment box, a three-phase alternating-current circuit voltage experiment box, a current measurement experiment box and a two-port network research.
The input module is a keyboard.
Referring to fig. 9, the server includes:
the main control module is used as a central control of the teaching system and used for realizing data exchange among modules in the server and between the server and the user side;
the comparison module is used for comparing the theoretical data and the experimental data input by the students, giving a comparison result and feeding the comparison result back to the main control module;
the data storage module is used for storing the theoretical data and the experimental data, the comparison result, the blank theoretical data table and the corresponding blank experimental data table which are input by the student;
the main control module is respectively connected with the comparison module and the data storage module.
The teaching system and the method for deepening understanding of the measuring principle of the test line provided by the embodiment of the invention are introduced in detail. The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The following description is of the preferred embodiment for carrying out the invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A teaching method for deepening understanding of the measuring principle of a test line, which is characterized in that,
the teaching method comprises the following steps:
s1, selecting a test circuit corresponding to the test line measurement principle experiment box on the user end to obtain a blank theoretical data table corresponding to the test circuit and a corresponding blank experimental data table;
s2, the student calculates theoretical data of the circuit parameters in the test circuit according to a circuit parameter calculation principle;
s3, under the premise that the user side does not show the measuring principle of the test line, the students measure the circuit parameters of the test circuit by themselves to obtain the experimental data;
s4, inputting the theoretical data obtained in S2 and the experimental data obtained in S3 by adopting an input module;
s5, the user end transmits the data in S4 to a server, and the server transmits the comparison result, the abnormal parameters in the comparison result and the corresponding test line measurement principle to the user end;
s6, the student determines the correct measuring mode according to the abnormal parameters shown by the user end and the corresponding measuring principle of the test line;
s7, measuring the abnormal parameter part again according to the correct measuring mode until obtaining the correct measuring value;
the teaching system formed by adopting the teaching method comprises the following steps:
the test line measurement principle experiment box comprises a plurality of electronic elements, the electronic elements form a test circuit through a plurality of branches, the test circuit comprises a plurality of current/voltage sockets, and students perform circuit parameter measurement experiments on the test circuit by adopting current/voltage test lines on a current/voltage meter;
the server is used for storing circuit parameter theoretical data, experimental data and a test line measurement principle, comparing the theoretical data with the experimental data and transmitting a comparison result to the user side;
the user terminal comprises a data input module and a data display module,
the input module is used for students to input circuit parameter data, and the data comprises theoretical data calculated by the students according to known parameters in the test circuit and experimental data obtained by measurement;
and the display module is used for displaying the theoretical and experimental circuit parameter data, the test line measurement principle and the comparison result.
2. A teaching method as claimed in claim 1, further comprising: and S8, the server stores theoretical data and experimental data input by students and corresponding comparison results.
3. Instructional method according to claim 1, characterized in that said circuit parameters comprise: and testing the voltage value and the current value of each branch in the circuit.
4. Teaching method according to claim 1, wherein said user side employs a service APP;
the connection mode between the user side and the server is wireless or optical fiber.
5. A teaching method as claimed in claim 1, wherein the test line measurement principle experiment box includes one or more of kirchhoff/superposition/homogeneous theorem verification experiment box, thevenin/norton theorem verification experiment box, measurement experiment box of equivalent parameters of single-phase ac circuit element, three-phase ac circuit voltage experiment box, current measurement experiment box and two-port network research.
6. Instructional method according to claim 1, characterized in that the input module is a keyboard.
7. Instructional method according to claim 1, characterized in that said server comprises:
the main control module is used as a central control of the teaching system and used for realizing data exchange among modules in the server and between the server and the user side;
the comparison module is used for comparing the theoretical data and the experimental data input by the students, giving a comparison result and feeding the comparison result back to the main control module;
the data storage module is used for storing the theoretical data and the experimental data, the comparison result, the blank theoretical data table and the corresponding blank experimental data table which are input by the student;
the main control module is respectively connected with the comparison module and the data storage module.
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| CN101377889A (en) * | 2008-09-28 | 2009-03-04 | 东莞市步步高教育电子产品有限公司 | Electronic device with built-in simulated physical and electrical experimental scene and control method thereof |
| CN104867385A (en) * | 2015-03-15 | 2015-08-26 | 周培宇 | Electromagnetic law exploration experimental apparatus and experimental method thereof |
| CN205899301U (en) * | 2016-06-27 | 2017-01-18 | 江西联博科技有限公司 | Data acquisition device |
| CN107610569A (en) * | 2017-10-23 | 2018-01-19 | 宜宾学院 | The determination method of analogous circuit experiment equipment and its required electronic component |
| CN108205954A (en) * | 2018-03-16 | 2018-06-26 | 重庆鲁班机器人技术研究院有限公司 | A kind of robot teaching's experimental box and system |
| CN109859586A (en) * | 2019-03-12 | 2019-06-07 | 冯涛 | A kind of all-electronic circuit experiment teaching method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020259590A1 (en) | 2020-12-30 |
| CN110264842A (en) | 2019-09-20 |
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