CN100483474C - Experimental education auxiliary management system - Google Patents

Experimental education auxiliary management system Download PDF

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Publication number
CN100483474C
CN100483474C CNB2007100691423A CN200710069142A CN100483474C CN 100483474 C CN100483474 C CN 100483474C CN B2007100691423 A CNB2007100691423 A CN B2007100691423A CN 200710069142 A CN200710069142 A CN 200710069142A CN 100483474 C CN100483474 C CN 100483474C
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China
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experimental
circuit
experiment
signal
management
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CNB2007100691423A
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Chinese (zh)
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CN101067892A (en
Inventor
徐铁峰
杨燕
李斌
谢建军
应祥岳
赵飞
郑久艳
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宁波大学
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Abstract

This invention discloses an experimental teaching assistant management system including multiple experimental signal process modules, at least one management module and a microcomputer connected with it characterizing that the input of the process module is connected with a signal collection probe, the output of which is set with a wireless T-R circuit of the experimental end, the input end of the management module is set with a wireless T-R circuit communicating with that of the experimental end, the signal process module is set with a channel sequence number generation device, which is advantaged that waveforms of output points of any experimental waveforms in various teaching boxes can be collected and managed quickly and conveniently if only altering sampling positions of signal collection probes.

Description

A kind of experimental education auxiliary management system
Technical field
The present invention relates to a kind of teaching aided management system, especially relate to a kind of experimental education auxiliary management system.
Background technology
Experimental teaching is the important supplementary means of colleges and universities' theory teaching, conscientiously operation and high-qualityly finish experiment to grasp knowwhy cultivation manipulative ability for the student most important, in many experiment course teachings that engineering and polytechnic universities are provided with, normally arrange 1 to 2 student to operate an experimental box, tens experimental boxs are set in the laboratory, the different experiments module that the student changes experimental box according to the different experiments content experimentizes, require the student to come the experimental waveform of the output of each point in the observation experiment equipment in the experiment and note down with oscillograph, giving teacher by experiment in the report passes judgment on, because qualified teachers' strength is limited, a laboratory can only be equipped with 1-2 experiment instruction teachers, and experimental period is limited, it is also different that the student does the speed of experiment, therefore teacher can't be on the classroom truth of every student experimenting of detail knowledge, experimental evaluation to the student also only rests on correcting of laboratory report, can not in experimentation, give timely correction, every student's of evaluation that also can't objective reality experiment situation to the problem that occurs in every student experimenting.At above-mentioned deficiency, Chinese patent application number is a kind of assistant learning machine for student experimenting that has disclosed in the 200610019437.5 application for a patent for invention prospectus by Wuhan University of Technology's invention, it is by microprocessor MCU, LCD, input equipment, mobile storage card and external memory card device, set USB interface on the MCU data bus, network service chip and network interface, the IIS interface chip, the standard serial port interface constitutes, its principle of work is: microprocessor MCU links to each other with the experimental apparatus data output interface by data communication interface (serial ports or USB interface), microprocessor MCU is connected with Experimental Network by network interface, also be connected with teacher's terminal server on the Experimental Network, it can be done each teaching link of experimental phase at school and obtain omnidistance experiment instruction, experimental data can be uploaded onto the server for teacher comment, but the Intelligent Recognition experimental result to mistake, the sum of errors precision.But yet there are some defectives in this above-mentioned invention, at first its complete machine structure is too complicated, cost is higher, and the experimental data output interface of not fixing in the various experimental boxs that domestic manufacturer produces at present, this is because in experimentation, different experiment contents need be observed the experimental waveform of different output points, the position of the output point of these experimental waveforms on each experiment module is different, therefore a common data output interface that is fit to each unit experiment content also can not be arranged, so the usable range that should invent is very little, can't be fit to the experimental facilities of any manufacturer production; The 2nd, microprocessor MCU, teacher's terminal server all need to be connected with Experimental Network by network interface, belonging to wired mode connects, have tens experimental facilitiess to be provided with to lay tens netting twines in the classroom, it also exists except technical sophistication cost height because of the laboratory connection wire too much causes the more mixed and disorderly defective of integral experiment environment.Therefore be necessary very much to develop one can be fit to various experimental facilitiess again not needs increase the low-cost experimental education auxiliary management system of too much line, be used for detecting in real time student's experimental implementation situation and objective evaluation student's experimental result and can find in time that the misdirection student carries out correct operation.
Summary of the invention
Technical matters to be solved by this invention provides a kind of experimental education auxiliary management system, this system is the waveform of experimental waveform output point arbitrarily in the various experimental teaching casees of acquisition management in real time, and cost is low, and is simple in structure, do not influence the laboratory integrated environment.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of experimental education auxiliary management system, comprise a plurality of experimental signal processing modules, at least one experimental signal administration module and the microcomputer that is connected with described experimental signal administration module, described experimental signal processing module input end is connected with signal acquisition probe, described experimental signal processing module output terminal is provided with experiment end wireless transceiver circuit, described experimental signal administration module input end is provided with the management end wireless transceiver circuit that communicates with described experiment end wireless transceiver circuit, and described experimental signal processing module is provided with the channel number generating means.
Described experimental signal processing module comprises that the experimental signal that described signal acquisition probe is collected carries out shaping, drive the experimental signal pre-process circuit that promotes, the experiment end data signal processing circuit that signal after the shaping is carried out analog-to-digital high-speed a/d change-over circuit and the experimental data signal after the analog to digital conversion is handled, the output terminal of described experiment end data signal processing circuit is connected with the input end of described experiment end wireless transceiver circuit, described channel number generating means is arranged on the described experiment end data signal processing circuit, described experimental signal administration module comprises management end data-signal treatment circuit and usb circuit, the output terminal of described management end wireless transceiver circuit is connected with described management end data-signal treatment circuit, and described microcomputer is provided with USB interface.
Described experiment end data signal processing circuit is made up of single-chip microcomputer and peripheral circuit, and described channel number generating means is the toggle switch that is connected with described single-chip microcomputer.
Described experiment end data signal processing circuit comprises programmable logic device (PLD), high speed static RAM and single-chip microcomputer and peripheral circuit, and described channel number generating means is the toggle switch that is connected with described single-chip microcomputer.
Described single-chip microcomputer model is AT89C52, described experiment end wireless transceiver circuit is that transceiving chip and the peripheral circuit of NRF2401 formed by model, is provided with model between described single-chip microcomputer and the described experiment end wireless transceiver circuit and is the level shifting circuit that the chip of 74LVC245 constitutes.
The model of described programmable logic device (PLD) is EPM240, and the model of described high speed static RAM is K6R1008V1D-J10.
Described signal acquisition probe comprises earth terminal and signals collecting end, is respectively the metal crocodile clip of band plastic jacket handle.
Described management end data-signal treatment circuit is that single-chip microcomputer and the peripheral circuit of AT89C52 formed by model, and described usb circuit is that chip and the peripheral circuit of CH370 formed by model.
Described experiment end wireless transceiver circuit and described management end wireless transceiver circuit all are wireless transceiver device PTR4000.
Described high-speed a/d change-over circuit is that streamlined high-speed a/d converter chip and the peripheral circuit of ADS930E formed by model.
Compared with prior art, the invention has the advantages that the input end in the experimental signal processing module connects signal acquisition probe, experimental signal processing module output terminal is provided with experiment end wireless transceiver circuit, the management end wireless transceiver circuit that communicates at setting of experimental signal administration module input end and experiment end radio receiving transmitting module, at various experimental teaching case and different requirement of experiment, as long as change the sampling location of signal acquisition probe, just can be quickly and easily the waveform of experimental waveform output point arbitrarily in the various experimental teaching casees of acquisition management in real time, hold the communication between wireless transceiver circuit and the management end wireless transceiver circuit then by experiment, with data be sent to the experiment instruction teacher that use with microcomputer that the experimental signal administration module is connected on, according to experimental result data storehouse that sets in advance and corresponding program, just rapidly and accurately the result of judgment experiment to mistake, and the position that the channel number generating means can make the microcomputer that is connected with the experimental signal administration module discern exactly to send the experimental teaching case of data-signal is set in the experimental signal processing module; Experiment end data signal processing circuit is made up of programmable logic device (PLD), high speed static RAM and single-chip microcomputer and peripheral circuit, than the experiment end data signal processing circuit of forming by single-chip microcomputer and peripheral circuit merely, the data capacity of its processing is bigger, is suitable for the experiment of some picture signals; When the single-chip microcomputer model of using is AT89C52, and wireless transceiver circuit is that the transceiving chip of NRF2401 and peripheral circuit are when forming by model, then need between single-chip microcomputer and wireless transceiver circuit, level shifting circuit be set, but single-chip microcomputer for some model, as the 89LS52 chip, then can omit level shifting circuit.
Description of drawings
Fig. 1 is the theory diagram of experimental education auxiliary management system of the present invention;
Fig. 2 is the experimental signal pre-process circuit of the embodiment of the invention one and the circuit diagram of high-speed a/d change-over circuit;
Fig. 3 is the circuit diagram of the experiment end data signal processing circuit of the embodiment of the invention one;
Fig. 4 is the circuit diagram of the experiment end wireless transceiver circuit of the embodiment of the invention one;
Fig. 5 is the circuit diagram of the level shifting circuit of the embodiment of the invention one;
Fig. 6 is the circuit diagram of the experimental signal administration module of the embodiment of the invention one;
Fig. 7 is the circuit diagram of the experiment end data signal processing circuit of the embodiment of the invention two.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one: a kind of experimental education auxiliary management system, comprise a plurality of experimental signal processing modules 1, experimental signal administration module 2 and the microcomputer 3 that is connected with experimental signal administration module 2, experimental signal processing module 1 comprises experimental signal pre-process circuit 11, high-speed a/d change-over circuit 12 and experiment end data signal processing circuit 13, experimental signal pre-process circuit 11 input ends are connected with signal acquisition probe 4, the output terminal of experiment end data signal processing circuit 13 is connected with experiment end wireless transceiver circuit 5, signal acquisition probe 4 comprises earth terminal 41 and signals collecting end 42, be respectively the metal crocodile clip of band plastic jacket handle, experimental signal pre-process circuit 11 is that 338 operational amplifiers and peripheral circuit are formed by two models, the experimental signal that signal acquisition probe 4 is collected carries out shaping and drives promoting, the high-speed a/d change-over circuit is that streamlined high-speed a/d converter chip and the peripheral circuit of ADS930E formed by model, signal after the shaping is carried out analog to digital conversion, experiment end data signal processing circuit 13 is that single-chip microcomputer and the peripheral circuit of AT89C52 formed by model, experimental data signal after the analog to digital conversion is handled, on the P12 ~ P17 pin of single-chip microcomputer, be connected with toggle switch 6 as the channel number generating means, experiment end wireless transceiver circuit 5 is that transceiving chip and the peripheral circuit of NRF2401 formed by model, be provided with the chip that model is 74LVC245 between single-chip microcomputer and the transceiving chip, between carries out level conversion, experimental signal administration module 2 comprises management end data-signal treatment circuit 21 and usb circuit 22, the input end of management end data-signal treatment circuit 21 is provided with and tests the management end wireless transceiver circuit 7 that end wireless transceiver circuit 5 communicates, management end data-signal treatment circuit 21 is that single-chip microcomputer and the peripheral circuit of AT89C52 formed by model, usb circuit 22 is that chip and the peripheral circuit of CH370 formed by model, management end wireless transceiver circuit 7 is that transceiving chip and the peripheral circuit of NRF2401 formed by model, be provided with the chip that model is 74LVC245 between single-chip microcomputer and the transceiving chip, between carries out level conversion, and microcomputer 3 is provided with USB interface.
Embodiment two: other structure is identical with embodiment one, difference is to test end data signal processing circuit 12 and comprises that also model is that EPM240 programmable logic device (PLD) and model are the K6R1008V1D-J10 high speed static RAM, the earth terminal 41 of signal acquisition probe 4 and signals collecting end 42 adopt the telescopic metal crotch of band plastic jacket, and experiment end wireless transceiver circuit 5 and management end wireless transceiver circuit 7 all are radio receiving transmitting module PTR4000.The experiment end data signal processing circuit 13 of this structure is provided with the programmable logic device (PLD) that can produce clock control circuit, address generation, commutation circuit and data-signal commutation circuit and is used to make the A/D conversion work in the required high speed static RAM of direct memory access mode, guarantee simultaneously the acquisition rate of A/D again in the workload that alleviates CPU, so just the A/D conversion designs is become dma mode (getting involved without CPU), i.e. the reading of the control timing of A/D conversion, data, data-storing (depositing static RAM (SRAM) in) are finished by CPLD (programmable logic device (PLD)).It is that timesharing is carried out that sampling and data send, and the phase one is the sampling period, and in the sampling period (approximately 50ms), high-speed a/d converter is changed continuously, and the data after the conversion directly deposit in the high speed static RAM.Need produce the address by CPLD during this period, treat that high speed static RAM is filled with the back by CPLD notice microprocessor.Subordinate phase is the data transmission period, and microprocessor is all read data in the high speed static RAM one by one, carries out data transmission (distributing about 50ms) through wireless transmitter module.Repeat said process later on.
In the foregoing description, the quantity of experimental signal processing module 1 can be identical with the tricks of experimental facilities in the classroom, be all to put one on every cover experimental facilities limit, its profile can design the high box for 15*10*5 centimetre of the wide * of growth *, experimental signal processing module 1 and experiment end wireless transceiver circuit 5 are installed in the box, box is outside equipped with the signal acquisition probe 4 that is connected with experimental signal processing module 1 input end in the box by lead, signal acquisition probe 4 can be designed to and the oscilloprobe same structure, at experiment with specific output waveform, this management system adopts Signal Collection Technology, gathering each experimental waveform that produces in student's operating process by signal acquisition probe 4 from each figure output point of different experimental boxs respectively carries out after the analog to digital conversion sending in the experiment instruction teacher and the microcomputer 3 that experimental signal administration module 2 is connected with Wireless transmission mode, teacher need not to go to that each student's experimental box is other just can observe the waveform that student's operation experiments is produced, such teacher just can monitor tens classmates' test situation simultaneously in real time, what signal adopted is the wireless transmission form, tens signal wires between tens experimental apparatuss and the experimental signal administration module 2 have been avoided, thereby make breadboard integrated environment neat, management system is easy to use, flexibly.Microcomputer 3 is finished receiving the post-processed of data by software programming, post-processed comprises that experimental data is reduced into experimental waveform on computer display also file, be provided with correct experimental data base in the microcomputer 3, data that the transmission of experiment end comes and correct experimental data compare judgement mistake are provided prompting, the instructor just can make objective evaluation to each student experimenting situation according to the evaluation result of microcomputer 3 like this, and the experiment that can find who student in real time makes mistakes and gives and real-time guidance.Toggle switch in the foregoing description also can be by being provided with the EROM circuit or replacing with software programming; dual mode inconvenient operation not; lack dirigibility; the also available AT89LS52 of single-chip microcomputer substitutes; at this moment just do not need the 74LVC245 level shifting circuit, other model single-chip microcomputer replacement circuits that have identity function equally also belong to protection scope of the present invention.
System's high speed A/D convertor circuit 13 is selected the pipeline-type high-speed a/d converter ADS930 of TI company for use, its speed is greater than 30M/S, wireless transceiver circuit adopts short distance 2.4GHz high speed 1Mbps radio receiving transmitting module PTR4000 (nRF2401A), it has the open 2.4GHz frequency range in the whole world, 125 channels, can receive the signal of 125 transmitters with a receiver simultaneously, has high data throughput, speed is 1Mbps, built in hardware CRC error correction and detection, emissive power, all working parameters such as frequency of operation are all finished by software setting, and the low power dissipation design needs are satisfied in 1.9~3.6V low-power consumption; It is by the software set address, and the ability output data makes things convenient for the point-to-multipoint radio communication especially when only receiving this machine address.The nRF2401 transceiver possesses distinctive DuoCeiver double-channel receiving mode simultaneously, the data that can be used to simultaneously to receive, transmission or two-way send separately.

Claims (9)

1, a kind of experimental education auxiliary management system, comprise a plurality of experimental signal processing modules, at least one experimental signal administration module and the microcomputer that is connected with described experimental signal administration module, described experimental signal processing module input end is connected with signal acquisition probe, described experimental signal processing module output terminal is provided with experiment end wireless transceiver circuit, described experimental signal administration module input end is provided with the management end wireless transceiver circuit that communicates with described experiment end wireless transceiver circuit, described experimental signal processing module is provided with the channel number generating means, it is characterized in that described experimental signal processing module comprises that the experimental signal that described signal acquisition probe is collected carries out shaping, drive the experimental signal pre-process circuit that promotes, the experiment end data signal processing circuit that signal after the shaping is carried out analog-to-digital high-speed a/d change-over circuit and the experimental data signal after the analog to digital conversion is handled, the output terminal of described experiment end data signal processing circuit is connected with the input end of described experiment end wireless transceiver circuit, described channel number generating means is arranged on the described experiment end data signal processing circuit, described experimental signal administration module comprises management end data-signal treatment circuit and usb circuit, the output terminal of described management end wireless transceiver circuit is connected with described management end data-signal treatment circuit, and described microcomputer is provided with USB interface.
2, a kind of experimental education auxiliary management system according to claim 1, it is characterized in that described experiment end data signal processing circuit is made up of single-chip microcomputer and peripheral circuit, described channel number generating means is the toggle switch that is connected with described single-chip microcomputer.
3, a kind of experimental education auxiliary management system according to claim 1, it is characterized in that described experiment end data signal processing circuit comprises programmable logic device (PLD), high speed static RAM and single-chip microcomputer and peripheral circuit, described channel number generating means is the toggle switch that is connected with described single-chip microcomputer.
4, according to claim 2 or 3 described a kind of experimental education auxiliary management systems, it is characterized in that described single-chip microcomputer model is AT89C52, described experiment end wireless transceiver circuit is that transceiving chip and the peripheral circuit of NRF2401 formed by model, is provided with model between described single-chip microcomputer and the described experiment end wireless transceiver circuit and is the level shifting circuit that the chip of 74LVC245 constitutes.
5, a kind of experimental education auxiliary management system according to claim 3, the model that it is characterized in that described programmable logic device (PLD) is EPM240, the model of described high speed static RAM is K6R1008V1D-J10.
6, a kind of experimental education auxiliary management system according to claim 1 is characterized in that described signal acquisition probe comprises earth terminal and signals collecting end, is respectively the metal crocodile clip of band plastic jacket handle.
7, a kind of experimental education auxiliary management system according to claim 1, it is characterized in that described management end data-signal treatment circuit is that single-chip microcomputer and the peripheral circuit of AT89C52 formed by model, described usb circuit is that chip and the peripheral circuit of CH370 formed by model.
8,, it is characterized in that described experiment end wireless transceiver circuit and described management end wireless transceiver circuit all are radio receiving transmitting module PTR4000 according to the described a kind of experimental education auxiliary management system of each claim in the claim 1 ~ 3.
9, a kind of experimental education auxiliary management system according to claim 1 is characterized in that described high-speed a/d change-over circuit is that streamlined high-speed a/d converter chip and the peripheral circuit of ADS930E formed by model.
CNB2007100691423A 2007-05-31 2007-05-31 Experimental education auxiliary management system CN100483474C (en)

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Publication number Priority date Publication date Assignee Title
CN102435797A (en) * 2011-09-29 2012-05-02 上海交通大学 Wireless probe for oscilloscope
CN104732829A (en) * 2015-04-13 2015-06-24 南通理工学院 Mobile network teaching system based on Android platform
CN104732830A (en) * 2015-04-13 2015-06-24 南通理工学院 Android platform mobile network teaching system of bilinear pairing-based encryption protocol
CN104735165A (en) * 2015-04-13 2015-06-24 南通理工学院 Android platform mobile network teaching system based on genetic algorithm
CN106100989B (en) * 2016-05-19 2019-06-21 徐州工程学院 A kind of experiment programmable route platform and its implementation
CN106940939A (en) * 2017-03-16 2017-07-11 牡丹江师范学院 Oral English Teaching servicing unit and its method
CN109036039A (en) * 2018-07-05 2018-12-18 宁波大学 A kind of Digital Circuit Experiment System
CN109036038B (en) * 2018-07-05 2020-08-07 宁波大学 Digital circuit experiment system and method
CN110376415A (en) * 2019-07-24 2019-10-25 北京科技大学 Oscilloscope data corrects system and method in a kind of circuit experiment teaching

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