CN108959682B - Method for establishing circuit virtual experiment - Google Patents
Method for establishing circuit virtual experiment Download PDFInfo
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- CN108959682B CN108959682B CN201810294463.1A CN201810294463A CN108959682B CN 108959682 B CN108959682 B CN 108959682B CN 201810294463 A CN201810294463 A CN 201810294463A CN 108959682 B CN108959682 B CN 108959682B
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- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
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Abstract
The invention discloses a circuit virtual experiment establishment method, which comprises the following steps: s10, establishing a circuit unit, wherein the circuit unit comprises an input endpoint, an output endpoint and an adjustable device positioned between the input endpoint and the output endpoint, and constructing a circuit unit library; s20, establishing a mathematical model of the circuit unit by adopting a network analysis method, and establishing a data processing branch of the corresponding circuit unit according to the mathematical model; s30, establishing a virtual experiment circuit in a virtual experiment area by using a circuit unit, and traversing the virtual experiment circuit; s40, carrying out flow processing on the virtual experiment circuit; s50, constructing a virtual experimental instrument and establishing a mathematical model of the virtual experimental instrument; s60 runs the virtual experiment circuit to generate virtual waveforms or to complete test operations. The method adopts a networking analysis method for the virtual experiment circuit, and adopts a multimedia technology means to realize the construction of the complex virtual experiment circuit and the generation of experimental operation results, thereby realizing the reproduction of the experimental process of the complex virtual experiment circuit.
Description
Technical Field
The invention belongs to the technical field of computers, and particularly relates to a circuit virtual experiment establishment method.
Background
In recent years, with the development of computer technology and network technology, virtual experiment technology is becoming an emerging experimental auxiliary means. By analyzing the internal logic structure of the virtual object, constructing a corresponding virtual experiment model by utilizing corresponding software, and combining a multimedia technology and a network technology, constructing a network virtual experiment system, a collaborative virtual experiment system and the like, the virtual experiment technology is greatly improved in the aspects of expression methods, interaction means and the like. Particularly, aiming at the virtual experiment design of the electronic class experiment course and the virtual construction of the corresponding virtual experiment circuit, the virtual experiment technology can realize the functions of virtual construction, virtual demonstration and the like of the virtual experiment circuit based on computer informatization, thereby enriching the experiment teaching means of the electronic class course and playing a certain role in promoting the teaching of related courses.
However, the virtual experiments for electronic class courses are different from other validation class experiments. In one aspect, in an electronic experimental circuit, the relationship between the input and the output is not a simple linear continuous relationship, and the change of the input of the experimental circuit and the parameter of the adjustable device can cause the output of the experimental circuit to change substantially, for example, for a single-stage low-frequency amplifier, the output parameter of the single-stage low-frequency amplifier presents three states of saturation distortion, cut-off distortion or normal output along with the change of the voltage bias resistor and the input parameter. Under the premise that the amplitude and the frequency of the input parameters are certain, the voltage bias resistor continuously changes to cause discontinuous change of the output parameters, meanwhile, the voltage bias resistor resistance corresponding to the discontinuous change has a certain relation with the amplitude of the input parameters, and the relation among the input parameters, the output parameters and other device parameters brings great difficulty to the traditional verification virtual experiment development. Traditional verification virtual experiment development also causes the flexibility deficiency of the virtual experiment module, and has a certain gap with the actual experiment characteristics of the virtual experiment object.
On the other hand, the electronic experiment is mainly a comprehensive and designed experiment in experimental teaching, so that the teaching effect of the experimental circuit unit in the virtual experimental system is not simple functional verification, the design is mainly that the experimental circuit unit needs to be subjected to necessary modularized treatment, and the circuit unit is combined and designed according to the requirements of the comprehensive and designed experiment to form a more complex functional virtual experimental circuit, which is essentially different from a simple design and analysis method for representing output phenomena and verifying characteristics, so that the traditional mode of simulating experimental phenomena by flash or html cannot meet the teaching requirement of the electronic experimental course in the virtual experimental design means of the electronic experimental course.
Disclosure of Invention
The invention aims to solve the technical problem of providing a circuit virtual experiment establishment method, which adopts a networking analysis method for a virtual experiment circuit, adopts a multimedia technology means to realize the establishment of a complex virtual experiment circuit and the generation of an experiment operation result (namely visual waveform output) to realize the reproduction of the experiment process of the complex virtual experiment circuit.
In order to solve the technical problems, the invention adopts the following technical scheme:
a circuit virtual experiment establishment method comprises the following steps:
s10, establishing a circuit unit, wherein the circuit unit comprises an input endpoint, an output endpoint and an adjustable device between the input endpoint and the output endpoint, and constructing a circuit unit library;
s20, establishing a mathematical model of the circuit unit by adopting a network analysis method, and establishing a corresponding data processing branch of the circuit unit according to the mathematical model;
s30, using the circuit unit, establishing a virtual experiment circuit in a virtual experiment area, and traversing the virtual experiment circuit;
s40, carrying out flow processing on the virtual experiment circuit;
s50, constructing a virtual experimental instrument and establishing a mathematical model of the virtual experimental instrument;
s60 runs the virtual experiment circuit to generate virtual waveforms or complete test operations.
In a preferred embodiment, step S10 includes:
s101, using software, taking a circuit for experiments as a circuit unit, setting a relation model among the input endpoint, the output endpoint and the adjustable device of the circuit unit, determining relative position coordinates of the input endpoint, the output endpoint and the adjustable device in the circuit unit, and storing the relation model and the relative position coordinates in a storage file corresponding to the circuit unit;
s102, constructing the circuit unit into a module capable of carrying out drag interaction, and marking the module by a circuit diagram corresponding to the circuit unit;
s103, respectively taking the input endpoint and the output endpoint as centers, respectively setting connection trigger areas of the input endpoint and the output endpoint by taking fixed values as radiuses, and storing corresponding parameters in the form of XML files to number the circuit units.
In a preferred embodiment, step S20 includes:
s201, establishing a parameter range of input and output of the circuit unit, and storing the data range in the XML file;
s202, establishing a mathematical model between input and output and parameters of an adjustable device; and establishing key value pairs which are combined by parameters of the input and adjustable devices in the XML file aiming at output parameter jump caused by parameter change of the input and adjustable devices, and storing corresponding mathematical models in the corresponding XML file.
In a preferred embodiment, step S30 includes:
s301, presetting a nine-grid in a virtual experiment area, and selecting and dragging the circuit unit to the virtual experiment area;
s302, completing connection among different circuit units according to the logic connection relation of the virtual experiment circuit;
s303 traverses all circuit units of the virtual experiment circuit to build a mathematical model of the virtual experiment circuit.
In a preferred embodiment, step S40 includes:
s401, taking the output variable of a signal source as a root node of a mathematical model description of the virtual experiment circuit;
s402, establishing a data processing branch of a first circuit unit of the virtual experiment circuit;
s403, analyzing the mathematical model of each circuit unit step by step, and establishing the mathematical model among the data processing branches of each stage so as to construct a tree-structured program traversal set.
In a preferred embodiment, step S50 includes:
s501, constructing an interaction module of the virtual experimental instrument;
s502, establishing a mathematical model of a signal source generated by the virtual experimental instrument according to the type of the virtual experimental instrument.
In a preferred embodiment, step S60 includes: and selecting a sensor and a load of the virtual experiment circuit, and performing operation debugging on the virtual experiment circuit.
In a preferred embodiment, the result of the operation of the virtual experiment circuit is visual.
The invention has the following beneficial effects:
1. the invention adopts a networked analysis method to construct a complex functional virtual experiment circuit aiming at comprehensive and design experiments in electronic experiment courses.
2. Compared with the traditional verification virtual experiment, the invention can reproduce the circuit units or virtual experiment circuits which are in nonlinear continuous relation, thereby improving the flexibility.
3. The invention uses visual means to assist the teaching of the electronic experiment course while reproducing the virtual experiment circuit.
Drawings
Fig. 1 is a step diagram of a circuit virtual experiment establishment method according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention discloses a circuit virtual experiment establishment method, which comprises the following steps:
s10, establishing a circuit unit, wherein the circuit unit comprises an input endpoint, an output endpoint and an adjustable device between the input endpoint and the output endpoint, and constructing a circuit unit library.
The method comprises the following steps:
s101, using software, taking a typical circuit used for experiments in an electronic class course as a circuit unit, setting a relation model among input end points, output end points (commonly called end points) and adjustable devices (or called adjustable areas) of the circuit unit according to the actual condition of the typical circuit, determining relative position coordinates of the input end points, the output end points and the adjustable devices in the circuit unit, and storing the relation model and the relative position coordinates in a storage file corresponding to the circuit unit.
S102, constructing the circuit units into modules capable of carrying out drag interaction in software according to the specific construction modes of the circuit units, and marking the modules by using circuit diagrams corresponding to the circuit units so as to improve the visual distinction of different circuit units.
S103, according to the input and output characteristics of the circuit unit, the input end point and the output end point of the circuit unit are subjected to region setting, the input end point and the output end point are respectively taken as centers, the fixed values are taken as radiuses, the connection trigger regions of the input end point and the output end point are respectively set, corresponding parameters are stored in software in the form of XML files, and the circuit unit numbers are given, so that a circuit unit library is formed by a plurality of circuit units with different numbers.
S20, establishing a mathematical model of the circuit unit by adopting a network analysis method, and establishing a data processing branch of the corresponding circuit unit according to the mathematical model.
The method comprises the following steps:
s201, on the mathematical model construction of the circuit unit, according to the circuit principle of the circuit unit and the direct current or alternating current relation, the parameter range of the input and output of the circuit unit is established, and the data range is stored in an XML file corresponding to the circuit unit based on a certain description format to be used as the data use basis of the circuit unit.
S202, establishing a mathematical model between the input and output and the parameters of the adjustable device based on the change of the relation between the input and output parameters generated by the adjustable device of the circuit unit; in particular, for output parameter jumps caused by parameter changes of the input and adjustable devices, two-dimensional data key values, i.e. key value pairs, are created in the XML file, which are combined with the parameters of the input and adjustable devices, and the corresponding mathematical model is stored in the XML file.
S30, using the circuit unit, establishing a virtual experiment circuit in the virtual experiment area, and traversing the virtual experiment circuit.
The method comprises the following steps:
s301, presetting a nine-grid in a virtual experiment area, and selecting and dragging a circuit unit to the virtual experiment area.
Clicking the circuit unit by using the mouse, pressing the mouse, and writing the number of the currently selected circuit unit in the software into the memory stack. After dragging the circuit unit to the virtual experimental area by using the mouse, the current center point of the circuit unit is taken as a reference point. When the left button of the mouse is released, software automatically judges the corresponding active area of the virtual experimental area nine boxes corresponding to the current selected circuit unit, and obtains the number of the current circuit unit and the number of the selected experimental interface active area as a data storage unit for circuit dragging operation, and operation storage is performed. Meanwhile, the software obtains the number of the current circuit unit and the number of the active area, performs superposition operation on the preset endpoint of the circuit unit and the coordinate information of the adjustable device through the preset coordinate information of the active area, obtains the coordinate information of the endpoint of the current circuit unit and the coordinate information of the adjustable device in the virtual experiment circuit, and stores the corresponding coordinate data in the description file of the current operation.
S302, according to the logic connection relation of the virtual experiment circuit, connection among different circuit units is completed.
Aiming at the connection operation of different circuit units, the current mouse activity mode is selected as the circuit unit connection line.
Clicking the mouse left in the virtual experiment area to obtain the coordinate information of the current mouse, traversing the endpoint data in the description file of the current operation, and calculating the distance data between the current mouse coordinate and each endpoint. When the distance data is smaller than the threshold value set by the software, the current circuit connection endpoint is judged to be established, and an endpoint event is triggered.
Regarding the determination of the start point or the end point, the software will acquire the latest data in the memory in a stack mode after the end point event is triggered, and determine whether the data is the end point data. If the endpoint data is the endpoint data, the endpoint data in the memory is the starting point data corresponding to the current endpoint event; if the data in the memory stack is not endpoint data, the current endpoint event corresponds to the start point data.
Regarding the processing of the starting point and the ending point data in the ending point event, if the current ending point event is the starting point event, writing the circuit unit ending point coordinate data corresponding to the current ending point event into a memory stack; if the current endpoint event is an endpoint event, the coordinate of the last endpoint event is read from the memory stack as the starting point of the circuit connection, connection data is formed by the current endpoint and the current endpoint, and the starting point and the endpoint identifier of the circuit connection are used as a circuit connection data storage unit and stored in the circuit description file. At the presentation level, the circuit connection will automatically generate a connection according to the preset active area and the coordinates of the endpoint inside the circuit.
S303 traverses all circuit units of the virtual experiment circuit to build a mathematical model of the virtual experiment circuit.
After the virtual experiment circuit is connected to the signal generating device and the testing device, clicking measurement is carried out, a circuit unit traversing event is triggered, circuit unit connection traversing is carried out by taking a connecting event of the signal generating device as a starting point, a tree-structure traversing method is adopted, the endpoint of the connecting event is taken as a reference, firstly, the attribute of the current endpoint is judged to be a circuit unit or a measuring device, and if the current endpoint is the circuit unit, the current circuit unit is taken as a root node and is stored in an operation description file.
Meanwhile, whether the output end point of the current circuit unit has matched connection event information is searched, and if the output end point of the current circuit unit has the matched connection event information, whether the next stage is the circuit unit is judged; if the matched connection event information is not queried, the current circuit unit is judged to be an output end and is used as a child node to form a relation with a father node until the current circuit connection is completely traversed.
S40, performing flow processing on the virtual experiment circuit.
The method comprises the following steps:
s401 takes the output variable of the signal source as the root node of the mathematical model description of the virtual experimental circuit.
S402 establishes a data processing branch of the first said circuit unit of the virtual experiment circuit.
Searching a first circuit unit of a current virtual experiment circuit, acquiring a circuit description identifier of a root node, acquiring a data model between input and output of a corresponding circuit unit and an adjustable device from a preset circuit unit library, constructing variation intervals of output corresponding to variation of different input and adjustable devices according to linear variation of the input, output and adjustable devices, and establishing different data processing branches for different variation intervals.
S403, analyzing mathematical models of the circuit units step by step according to traversing results of the circuit units, establishing mathematical models among branches of each level according to data processing branches of the previous level to construct a tree structure program traversing set, storing a tree data structure in a description file of a current virtual experiment circuit, and establishing a mathematical model of the current virtual experiment circuit connection.
S50, constructing a virtual experimental instrument and establishing a mathematical model of the virtual experimental instrument.
The method comprises the following steps:
s501, according to specific requirements of electronic class courses, constructing an interaction module of each virtual experimental instrument (such as signal equipment, virtual test equipment and the like). And setting triggering events corresponding to the buttons in the interaction module.
S502, establishing a mathematical model of a signal source generated by the virtual experimental instrument according to the type of the virtual experimental instrument. The signal generating device is simulated according to specific requirements in electronic courses, and the effect of the signal source in an actual circuit is simulated on an interactive interface and a mathematical logic relation.
S60 runs the virtual experiment circuit to generate virtual waveforms or to complete test operations.
1) And selecting the load of the virtual experiment circuit, and performing operation debugging on the virtual experiment circuit.
According to the mathematical model of the circuit unit, parameters of an adjustable device (such as a sliding rheostat) in the virtual experimental circuit, the connection or non-connection of a specific circuit and the like are adjusted and changed in an analog form, and the parameter quantity of the adjustable device is characterized so as to achieve the same simulation as an experiment. Meanwhile, the setting of the parameters is based on actual theoretical calculation, and completely meets the requirements of real experimental purposes. In the specific debugging process, the built modeling circuit can truly and synchronously display the changes of output quantities such as waveforms and the like caused by the changes of the parameters, and the debugging process and the debugging result which are the same as those of a real experiment are realized.
2) The operation result of the virtual experiment circuit established by the circuit virtual experiment establishment method is visible. The advantages of the virtual instrument can be fully exerted by utilizing the powerful graphic display function of the computer. When different analog measurement and control experiments are performed, the requirements of the experiments can be met by only changing external sensors and loads, and the experimental process and experimental results are displayed on a screen in an image mode, so that measurement and display of analog signals are achieved, and students are intuitively aware in the teaching process. An array of length 3600 represents ten sinusoidal cycles, i.e., each 360 array elements represents a cycle, each element representing a degree of the corresponding cycle. Starting to let all elements be 1, multiplying the sine values of the corresponding degrees respectively, and obtaining ten smooth sine arrays. Then, the array is traversed from element number 0, each element is increased or decreased by 5% of its own value randomly, and a curve connecting each point is drawn on the screen by using a brush after traversing, so that a jittery waveform is obtained. The above operation is repeatedly performed every 0.5 seconds, and a waveform with high simulation degree can be obtained. The creation of the various forms of waveforms in the different experiments was created using the method described above, entirely following the shape of the actual waveform. Meanwhile, when parameters are changed and a circuit is debugged, the corresponding waveform changes are timely and synchronously changed and displayed.
It should be understood that the exemplary embodiments described herein are illustrative and not limiting. Although one or more embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (7)
1. The method for establishing the circuit virtual experiment is characterized by comprising the following steps of:
s10, establishing a circuit unit, wherein the circuit unit comprises an input endpoint, an output endpoint and an adjustable device between the input endpoint and the output endpoint, and constructing a circuit unit library;
s20, establishing a mathematical model of the circuit unit by adopting a network analysis method, and establishing a corresponding data processing branch of the circuit unit according to the mathematical model;
s30, using the circuit unit, establishing a virtual experiment circuit in a virtual experiment area, and traversing the virtual experiment circuit;
s40, carrying out flow processing on the virtual experiment circuit;
s50, constructing a virtual experimental instrument and establishing a mathematical model of the virtual experimental instrument;
s60, running the virtual experiment circuit to generate a virtual waveform or complete test operation;
step S40 includes:
s401, taking an output variable of a signal source as a root node of mathematical model description of a virtual experiment circuit;
s402, establishing a data processing branch of the first circuit unit of the virtual experiment circuit;
searching a first circuit unit of a current virtual experiment circuit, acquiring a circuit description identifier of a root node, acquiring a data model between input and output of a corresponding circuit unit and an adjustable device from a preset circuit unit library, constructing variation intervals of output corresponding to variation of different input and adjustable devices according to linear variation of the input, output and adjustable devices, and establishing different data processing branches for different variation intervals;
s403, analyzing mathematical models of the circuit units step by step according to traversing results of the circuit units, establishing mathematical models among branches of each level according to data processing branches of the previous level to construct a tree structure program traversing set, storing a tree data structure in a description file of a current virtual experiment circuit, and establishing a mathematical model of the current virtual experiment circuit connection.
2. The circuit virtual experiment setup method according to claim 1, wherein step S10 includes:
s101, using software, taking a circuit for experiments as a circuit unit, setting a relation model among the input endpoint, the output endpoint and the adjustable device of the circuit unit, determining relative position coordinates of the input endpoint, the output endpoint and the adjustable device in the circuit unit, and storing the relation model and the relative position coordinates in a storage file corresponding to the circuit unit;
s102, constructing the circuit unit into a module capable of carrying out drag interaction, and marking the module by a circuit diagram corresponding to the circuit unit;
s103, respectively taking the input endpoint and the output endpoint as centers, respectively setting connection trigger areas of the input endpoint and the output endpoint by taking fixed values as radiuses, and storing corresponding parameters in the form of XML files to number the circuit units.
3. The circuit virtual experiment setup method according to claim 2, wherein step S20 includes:
s201, establishing a parameter range of input and output of the circuit unit, and storing the parameter range in the XML file;
s202, establishing a mathematical model between input and output and parameters of an adjustable device; and establishing key value pairs which are combined by parameters of the input and adjustable devices in the XML file aiming at output parameter jump caused by parameter change of the input and adjustable devices, and storing corresponding mathematical models in the corresponding XML file.
4. The circuit virtual experiment setup method of claim 3, wherein step S30 comprises:
s301, presetting a nine-grid in a virtual experiment area, and selecting and dragging the circuit unit to the virtual experiment area;
s302, completing connection among different circuit units according to the logic connection relation of the virtual experiment circuit;
s303 traverses all circuit units of the virtual experiment circuit to build a mathematical model of the virtual experiment circuit.
5. The circuit virtual experiment setup method according to claim 1, wherein step S50 includes:
s501, constructing an interaction module of the virtual experimental instrument;
s502, establishing a mathematical model of a signal source generated by the virtual experimental instrument according to the type of the virtual experimental instrument.
6. The circuit virtual experiment setup method of claim 5, wherein step S60 includes: and selecting a sensor and a load of the virtual experiment circuit, and performing operation debugging on the virtual experiment circuit.
7. The circuit virtual experiment setup method of claim 1 or 6, wherein an operation result of the virtual experiment circuit is visible.
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| CN110570735B (en) * | 2019-09-02 | 2021-11-16 | 浙江传媒学院 | VISA-based virtual-actual combined virtual experiment construction method |
| CN111897461A (en) * | 2020-07-09 | 2020-11-06 | 北京国发天元信息技术有限公司 | Internet-based interactive virtual experiment implementation method |
| CN113792444A (en) * | 2021-11-15 | 2021-12-14 | 成都泰盟软件有限公司 | Method for constructing waveform of mechanics virtual simulation experiment |
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