CN210983953U

CN210983953U - Novel circuit and system experiment device

Info

Publication number: CN210983953U
Application number: CN201920761807.5U
Authority: CN
Inventors: 刘翔; 陈松; 周细义; 杨宣兵; 陈曦
Original assignee: Hunan Institute of Science and Technology
Current assignee: Hunan Institute of Science and Technology
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-07-10
Anticipated expiration: 2029-05-24

Abstract

The utility model belongs to the technical field of synthesize the experiment, a novel circuit and system experiment device is disclosed, is provided with: an experimental box; an expansion module slot is fixed on the right part of the experiment box through a bolt, and the expansion module slot is connected with the liquid crystal touch screen, the signal and system experiment module, the digital FFT signal decomposition and synthesis module, the circuit principle and experiment module, the optional component module and the instrument and meter module through wires; the uppermost end of one side of the left part of the experiment box is fixed with a liquid crystal control screen through a bolt, and the experiment box is fixed with a full-digital FFT signal decomposition and synthesis module through a bolt; and the lowest part is a signal and system experiment module. The utility model adopts a modular structure, seven modules can be flexibly combined, all experiments of circuit analysis, signals and system courses are covered, and the support to courses such as digital signal processing and the like can be realized through developing and expanding modules; and each module is designed into asymmetric short-circuit-preventing plug-in power supply, so that the power supply safety is ensured.

Description

Novel circuit and system experiment device

Technical Field

The utility model belongs to the technical field of synthesize the experiment, especially, relate to a novel circuit and system experiment device.

Background

Currently, the current state of the art commonly used in the industry is such that: experiments are an important course link of electric information major, so that the study theoretical knowledge is deepened through the experiments, more importantly, the basic testing means and method are mastered in the aspect of establishing subject confirmation thinking, and a foundation is played for the post work of students after graduation. The purpose and the content of each experiment are different, the subjective initiative of students is fully exerted, the students are prompted to think independently, the experiments are completed independently, and the experiments are innovated. In the traditional circuit theory, signal and system analysis experiment, all experimental instruments and equipment are arranged in a laboratory, so that a large amount of laboratory space is occupied, students cannot perform experimental operation in a unified and centralized mode, and only can perform experimental operation in batches, and the learning efficiency and the learning space of the students are severely limited. At present, various types of circuit theory experiment systems and signal and system experiment platforms are respectively arranged in domestic markets, but an experiment platform which simultaneously supports two courses of teaching does not exist, and the problem of experiment efficiency still cannot be fundamentally solved.

In summary, the problems of the prior art are as follows:

at present, experiment platforms of various models in domestic markets can not support two courses simultaneously, so that experiment operation is complex, and experiment efficiency is low.

The difficulty and significance for solving the technical problems are as follows: the circuit theory and the signal and system are core basic theory courses of the electrical information major, and correspond to a large number of course experimental items respectively. At present, experiments of two courses are designed into two sets of experiment systems respectively by various models of experiment platforms in domestic markets, and the problems that too many integrated experiment projects are considered and the design difficulty is high are mainly considered. The adverse effects resulting from this are: the laboratory must be set up alone, leads to the laboratory function singleness, and the instrument and equipment utilization benefit reduces. The utility model discloses utilize the modular structure, combine integrated liquid crystal display the control unit, with the effective integration of above-mentioned two course experiments, improved the laboratory performance greatly, practiced thrift the input of hardware equipment cost.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model provides a novel circuit and system experiment device.

The utility model discloses a realize like this, a novel circuit is provided with system experiment device: the right part of the experimental box is fixedly provided with an expansion module slot through a bolt, and the expansion module slot is connected with the liquid crystal touch screen, the signal and system experiment module, the digital FFT signal decomposition and synthesis module, the circuit principle and experiment module, the optional component module and the instrument module through wires;

the uppermost end of one side of the left part of the experiment box is fixed with a liquid crystal control screen through a bolt, and the experiment box is fixed with a full-digital FFT signal decomposition and synthesis module through a bolt; the lowest part is a signal and system experiment module which is fixed on the experiment box through a bolt; the instrument module is arranged at the uppermost end of the other side of the experimental box and is fixed on the experimental box by a bolt; the circuit principle and the experiment module are fixed on the experiment box through bolts; and the optional component module is fixed on the experimental box through a bolt.

Furthermore, a constant current source, a voltage source, an ammeter, a voltmeter, an ohmmeter and a signal source are embedded in the instrument module, and an over-range alarm is fixed on the onboard ammeter and the voltmeter through screws.

Further, the full-digital FFT signal decomposition and synthesis module is fixed inside the experiment box through screws.

Furthermore, an experiment guidance course is displayed through a liquid crystal control screen.

Furthermore, the power supply is fixed with a reverse plug-in prevention device through screws.

To sum up, the utility model discloses an advantage and positive effect do:

1. the large-screen color touch liquid crystal is adopted for centralized control and display, and a high-precision full-digital instrument comprising an ammeter, a voltmeter, an ohmmeter, a constant current source and a signal source is perfectly combined with the liquid crystal; the synchronous electronic experiment instruction book is arranged, so that active guidance and real-time error correction of the experiment steps can be realized.

2. Perfect circuit protection measures are adopted to ensure that the over-range damage or short circuit accidents of various instruments do not occur in the experimental process; meanwhile, the sound and light alarm function is arranged, so that the error operation of an experimenter can be reminded, the equipment is protected to the maximum extent, and the normal operation of experiment courses is ensured.

3. By adopting a modular structure, the seven modules can be flexibly combined to cover all experiments of circuit analysis, signals and system courses, and meanwhile, the support of courses such as digital signal processing and the like can be realized by developing the extension module; each module is designed into asymmetric short-circuit prevention plug-in power supply, so that the power supply safety is ensured;

4. compared with domestic similar products, the system has multiple original technologies and functions: the advanced full digital FFT technology can display signal waveform, frequency spectrum and phase; safety protection technology of all test ports and instrument output ports; the synchronous experiment active guide and error correction function; high performance-price ratio.

5. The over-range alarm can remind the experimenter to correct errors in time and protect equipment. The onboard integrated constant current source for the experiment, the voltage source, the ammeter, the voltmeter, the ohmmeter and the signal source can be integrated on board, the control of the instruments and the display of measurement data can be realized through liquid crystal operation, the experiment can be smoothly completed even if the instruments such as the universal signal source and the universal meter are not configured due to the integration of the commonly used instruments, and the investment of instrument equipment cost of 200-4000 yuan/set can be saved for users.

6. Through the full digital FFT circuit board, the synthesis and decomposition experiments aiming at the non-sine wave periodic signals can be carried out; the experiment guidance course can be displayed in real time through the liquid crystal screen, so that students can complete the experiment operation independently; through preventing the cartridge device, can convenience of customers expand the experiment module according to the demand, realize the support to more experiments and other course experiments.

Drawings

Fig. 1 is a schematic structural diagram of a novel circuit and system experiment device provided by the embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the experimental box provided by the embodiment of the present invention.

In the figure: 1. an experimental box; 2. a liquid crystal control screen; 3. a full digital FFT signal decomposition and synthesis module; 4. a signal and system experiment module; 5. an instrument module; 6. a circuit principle and experiment module; 7. selecting a component module; 8. an expansion module slot.

Detailed Description

In order to further understand the contents, features and functions of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the embodiment of the present invention provides a novel circuit and system experiment device, which includes: the system comprises an experimental box 1, a liquid crystal control screen 2, a full-digital FFT signal decomposition and synthesis module 3, a signal and system experimental module 4, an instrument module 5, a circuit principle and experimental module 6, a self-selection component module 7 and an expansion module slot 8.

The expansion module slot 8 is fixed on the right part of the experimental box 1 through a bolt; the expansion module slot 8 is connected with the liquid crystal touch screen 2, the signal and system experiment module 4, the digital FFT signal decomposition and synthesis module 3, the circuit principle and experiment module 6, the optional component module 7 and the instrument module 5 through wires; the liquid crystal control screen 2 is fixed at the uppermost end of one side of the left part of the experiment box 1 through a bolt, and the full-digital FFT signal decomposition and synthesis module 3 is fixed in the experiment box 1 through a bolt; the lowest part is a signal and system experiment module 4 which is fixed on the experiment box 1 through a bolt; the instrument module 5 is arranged at the uppermost end of the other side and is fixed on the experiment box 1 through bolts, a constant current source, a voltage source, an ammeter, a voltmeter, an ohmmeter and a signal source are embedded in the instrument module 5, and an over-range alarm is fixed on the onboard ammeter and the voltmeter through screws; the circuit principle and experiment module 6 is fixed on the experiment box through a bolt; the optional component module 7 is fixed on the experimental box 1 through a bolt, and the power supply is fixed with a reverse plug-in prevention device through a screw; the vulnerable interface and the vulnerable device of the experimental circuit are provided with good protection circuits.

As the utility model discloses a preferred embodiment, the reservation has the WIFI interface, and experimental data is uploaded to the accessible internet, through developing host computer experiment report generation software or cell-phone APP software in addition, can realize functions such as uploading in real time, reading and wholesale of experiment report.

As the utility model discloses a preferred embodiment, the accuse module has integrateed functions such as signal generator, ohmmeter among the experimental system, must adopt isolation design just to make and avoid crosstalk each other through the earth connection between each functional circuit. Each module of the experiment system is communicated with the central control module by adopting a professional isolation chip, and under the condition of ensuring zero error transmission of communication and zero loss of data, the central control module can not be influenced even if a certain module is short-circuited.

As the preferred embodiment of the utility model, perfect circuit protection measure, student's experiment is the unavoidable, and is the normalizer moreover. If the experimental equipment is not considered in the aspect of safety protection, frequent equipment failures can be caused, and the experiment cannot be completed within a specified time. The utility model fully considers the aspect of easy damage of students in the experimental process, firstly, the over-range protection and voice alarm functions are designed for all onboard instruments; secondly, all I/O ports are designed with protective circuits to prevent short circuit; thirdly, each module is electrified to adopt a reverse plugging prevention device. Through the measures, the failure rate of the equipment is greatly reduced.

As the utility model discloses a preferred embodiment, the utility model discloses in designed instrument module alone, contain 2 voltmeters, 2 ampere meters, 1 constant current source, 1 ohmmeter and 1 signal source, all instruments all can be through touch liquid crystal screen control switch start-up, parameter setting and measured data display, and this design belongs to original design in like product.

As a preferred embodiment of the present invention, the "decomposition and synthesis of non-sinusoidal periodic signals" in the present invention is an important experiment in the course of circuits and systems. Although the experiment module for completing the experiment is designed in the market experiment system, the realization mode is realized by adopting an analog filter, and the experiment effect is poor. The system is provided with a non-sinusoidal periodic signal decomposition and synthesis experimental module realized by the full-digital FFT independently, and realizes the decomposition and synthesis of signals by software by using a full-digital algorithm, so that the experimental effect is greatly improved. The software has applied for copyright of national copyright office software (2018SR 671652).

As the utility model discloses a preferred embodiment, this system has originally created the experimentation guide function, with the direction process document embedded system of every experiment, through the real-time demonstration experiment of calling of liquid crystal guide the process, the guide student accomplishes the experiment project. This function is directed against big student's experimental occasion in batches, and the teacher can't be tutor alone one by one, and the student can independently accomplish the experiment according to the guide document. The function can greatly improve the guidance efficiency of experimental teaching.

As the preferred embodiment of the utility model, this system adopts industrial grade high-definition colored touch LCD screen, has realized that the start-up of all board carried measuring instruments (ohmmeter, voltmeter, ampere meter, constant current source) is closed, functions such as parameter setting control, measured data show, and relevant centralized control has applied for obtaining the software copyright of national copyright office (2018SR669156) with the display software.

The utility model discloses a theory of operation is: through the power switch above the integrated experiment appearance 5 of board year, open experimental apparatus, the back has been lighted to liquid crystal touch-sensitive screen 2, clicks the start experiment button that shows, starts each instrument respectively according to the required instrument of experiment. The centralized control and display can be realized through the liquid crystal touch screen 2; through the onboard integrated experiment instrument 5, the onboard integrated experiment constant current source, the voltage source, the ammeter, the voltmeter, the ohmmeter and the signal source can realize the control of the instrument and the display of the measured data through the liquid crystal operation; the over-range alarm can remind the experimenter to correct errors in time and protect equipment; through the protection circuit, even if a student is in wrong wiring or misoperation, irreversible damage cannot be caused in a short time, so that the experiment can be smoothly started to the maximum extent, and the BPF cannot be frequently interrupted; through the full digital FFT circuit board 6, the synthesis and decomposition experiments aiming at the non-sine wave periodic signals can be carried out; the experiment guidance course can be displayed in real time through the liquid crystal screen, so that students can complete the experiment operation independently; through preventing the cartridge device, can convenience of customers expand the experiment module according to the demand, realize the support to more experiments and other course experiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a novel circuit and system experiment device which characterized in that, novel circuit and system experiment device be provided with:

an experimental box;

an expansion module slot is fixed on the right part of the experiment box through a bolt, and the expansion module slot is connected with the liquid crystal touch screen, the signal and system experiment module, the digital FFT signal decomposition and synthesis module, the circuit principle and experiment module, the optional component module and the instrument and meter module through wires;

2. The novel circuit and system experimental device as claimed in claim 1, wherein the instrument module is embedded with a constant current source, a voltage source, an ammeter, a voltmeter, an ohmmeter and a signal source, and an over-range alarm is fixed on the onboard ammeter and the voltmeter through screws.

3. The novel circuit and system experimental device as claimed in claim 1, wherein the full digital FFT signal decomposition and synthesis module is fixed inside the experimental box by screws.

4. The novel circuit and system experimental device as claimed in claim 1, wherein the experimental guidance course is displayed through the liquid crystal control screen.

5. The novel circuit and system experimental device of claim 1, wherein the power supply is fixed with a plug-in prevention device through screws.