CN100495472C - Experiment teaching auxiliary management method - Google Patents
Experiment teaching auxiliary management method Download PDFInfo
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- CN100495472C CN100495472C CNB2007100700723A CN200710070072A CN100495472C CN 100495472 C CN100495472 C CN 100495472C CN B2007100700723 A CNB2007100700723 A CN B2007100700723A CN 200710070072 A CN200710070072 A CN 200710070072A CN 100495472 C CN100495472 C CN 100495472C
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Abstract
The present invention discloses an experimental teaching auxiliary management method, which is characterized in that the present invention is provided with at least one experimental signal management module and a presupposition experimental answer database microcomputer which is connected with the experimental signal management module, a signal collecting probe experiment signal processing module which is arranged on an input end correspondingly arranged close to each experimental facility processes the collected signal, and then transmits the collected signal after being deposing to a wireless transceiver circuit of an experiment end for sending, the input end of an experiment signal management module is provided with a wireless transceiver circuit of a management end, the received signal is transmitted to the experimental signal management module to process, and then is input to the microcomputer, which is compared with the correct answer in the experimental answer database, thus judging whether the experiment data is right, the experiment signal processing module sets up the channel serial number of each experimental facility by setting up a channel serial number generating device, the microcomputer judges the experimental facility corresponding to the received data signal through channel serial number, and the present invention has the advantages of collecting and managing the waveform of any output point of experimental waveform in the experimental facility in a real time way.
Description
Technical field
The present invention relates to a kind of teaching auxiliary management method, especially relate to a kind of experiment teaching auxiliary management method.
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.
Summary of the invention
Technical matters to be solved by this invention provides a kind of experiment teaching auxiliary management method, this method is the waveform of experimental waveform output point arbitrarily in the various experimental teaching casees of acquisition management in real time, detect student's experimental implementation situation and objective evaluation student's experimental result and also can find in time that the misdirection student carries out correct operation, and cost is low, 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 experiment teaching auxiliary management method, and it may further comprise the steps: one, gather experimental signal by the signal acquisition probe that its input end is provided with at corresponding sampled point by being arranged on the other experimental signal processing module of experimental provision; Two, by the experimental signal processing module signal that collects is handled, and the channel number of every experimental provision being set by the channel number generating means that is arranged on the experimental signal processing module, the packet after will packing then is sent to experiment end wireless transceiver circuit; Three, select corresponding transmitting channel to send the rf data bag according to channel number; Four, receive the rf data bag of experiment end wireless transceiver circuit transmission and be sent to the experimental signal administration module by the management end wireless transceiver circuit; Five, by the experimental signal administration module rf data bag that the management end wireless transceiver circuit sends is imported microcomputer by usb circuit; Six, microcomputer receives the rf data bag of usb circuit input and be reduced into picture signal on display, then with the experiment answer database that is stored in the microcomputer in correct option compare the judgment experiment data whether correct, and judge the pairing experimental provision of rf data bag that receives according to the channel number of rf data bag.
In the step 2 signal that collects handled and comprise by the shaping of experimental signal pre-process circuit and drive to promote, carry out analog to digital conversion and handle by the experimental data signal of experiment end data signal processing circuit after to analog to digital conversion by the signal of high-speed a/d change-over circuit after to shaping.
Described experiment end data signal processing circuit can be 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, and the process that the signal after being promoted by shaping of experimental signal pre-process circuit and driving is handled may further comprise the steps: 1. to single-chip microcomputer and the initialization of high-speed a/d change-over circuit; 2. read toggle switch, determine the current transmitting channel of experiment end wireless transceiver circuit according to being provided with of toggle switch; 3. according to transmitting channel initialization experiment end wireless transceiver circuit; 4. start the high-speed a/d change-over circuit; 5. read the experimental data signal after the analog to digital conversion; 6. judge that a frame buffered data is completely denied to be then to continue next step, otherwise to return step 5.; 7. transmit buffered data to experiment end wireless transceiver circuit.
Described experiment end data signal processing circuit also can comprise 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, by the shaping of experimental signal pre-process circuit and the process handled of the signal after drive promoting comprise data buffering process and data read process, the data buffering process may further comprise the steps: A, to single-chip microcomputer and the initialization of high-speed a/d change-over circuit; B, read toggle switch, determine the current transmitting channel of experiment end wireless transceiver circuit according to being provided with of toggle switch; C, according to transmitting channel initialization experiment end wireless transceiver circuit; D, startup high-speed a/d change-over circuit; E, programmable logic device (PLD) address counter counting; F, judge that whether the programmable logic device (PLD) counter is counted fullly, is then to forward step I to, otherwise continues step G; G, the output of high-speed a/d change-over circuit data allow; H, high speed static RAM write data, return step e then; I, A/D EOC, the high-speed a/d change-over circuit stops output data, and the programmable logic device (PLD) address counter stops counting; Data read process may further comprise the steps: J, programmable logic device (PLD) are pressed the single-chip microcomputer signal and are produced data address; K, single-chip microcomputer begin to prepare reading of data; L, programmable logic device (PLD) control high speed static RAM are put into data line with the data of corresponding address; M, single-chip microcomputer reading of data; N, judge that whether the frame data in the high speed static RAM are all read away, are then to continue next step, otherwise turn back to step K; 0, transmits buffered data to experiment end wireless transceiver circuit.
Can be set to following fourth gear by the frequency division acquisition rate of programmable logic device (PLD): when signal frequency during greater than 100KHz, acquisition rate is 20MHz, when signal frequency is 10KHz ~ 100KHz, acquisition rate is 2MHz, when signal frequency is 1KHz ~ 10KHz, acquisition rate is 200KHz, when signal frequency during less than 1KHz, acquisition rate is 20KHz, the high-speed a/d change-over circuit is in analog-to-digital process, according to the signal frequency of experimental provision sampled point, choose a kind of in the fourth gear acquisition rate as actual samples speed.
By the experimental signal administration module rf data bag that the management end wireless transceiver circuit sends is imported microcomputer by usb circuit in the step 5, detailed process comprises to the usb circuit initialization, according to the receiving channels initialization management end wireless transceiver circuit of microcomputer setting, read rf data bag that management end wireless transceiver circuit 7 sends and the rf data bag that receives is sent to microcomputer by usb circuit.
Rf data bag that microcomputer reception usb circuit is imported in the step 6 and the process that is reduced into picture signal on display may further comprise the steps: 1. pair usb circuit initialization, usage data buffer is uploaded mode, monitor USB plug state, data query is set at interval, and with the numbering zero setting of current received RF packet; 2. determine the current receiving channels of management end wireless transceiver circuit; 3. determine the channel number of experimental provision according to receiving channels; 4. the judgment data query time is then to continue step 5 to not, otherwise continues step 4; 5. read a collection of buffered data; 6. judging whether buffered data reads finishes, and is then to continue next step, otherwise returns step 4; 7. receiving buffered data handles.
The process that step 7 receives the buffered data processing may further comprise the steps: 71. read the data of a rf data bag; 72. judge whether the numbering of rf data bag is correct, be then to forward step 74 to, otherwise forward step 73 to; 73. return step 71 again after the rf data packet number of current reception put 0; 74. the rf data packet number of current reception is added 1, takes out Wave data; 75. judge whether to be combined into the complete display waveform data of a frame, be then to continue step 76, otherwise return step 71; 76. the display waveform data, and the numbering of the rf data bag of current reception put 0, begin the processing of new display waveform data then; Whether, be then finish, otherwise return step 71 77. judge buffered data if disposing.
The process of step 76 display waveform data may further comprise the steps: the scale that 1) a screen display waveform is set according to current acquisition rate; 2) initialization shows that step-length is 1; Whether be 1:1 show, be then to continue step 4), otherwise first reading displayed step-length continues step 4) again if 3) judging current; 4) according to 200 data that show the step-length reading displayed; 5) judge whether to read 200 data of a screen, be then to continue step 6), otherwise return step 4); 6) removing a last screen shows; 7) according to showing step-length adjustment display scale; 8) 200 byte datas with a screen display waveform are normalized to-1 to 1; 9) video data is connected in turn with line segment from the 1st to the 200th.
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 provision 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 experimental provision that channel number can make the microcomputer that is connected with the experimental signal administration module discern exactly to send data-signal is set by the channel number generating means; 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; And be set to the different speed of fourth gear by the frequency division acquisition rate of programmable logic device (PLD), and then can select suitable acquisition rate according to the difference of signal frequency, the signal of collection can intactly be shown.
Description of drawings
Fig. 1 is a theory diagram 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 that the present invention tests the end wireless transceiver circuit;
Fig. 5 is the circuit diagram of level shifting circuit of the present invention;
Fig. 6 is the circuit diagram of experimental signal administration module of the present invention;
Fig. 7 is the circuit diagram of the experiment end data signal processing circuit of the embodiment of the invention two;
Fig. 8 is the signal processing flow figure of the embodiment of the invention one;
Fig. 9 is the process flow diagram of data buffering process in the signal processing of the embodiment of the invention two;
Figure 10 is the process flow diagram of data read process in the signal processing of the embodiment of the invention two;
Figure 11 is that rf data wraps in the process flow diagram that is reduced into the process of picture signal on the microcomputer display;
Figure 12 is the process flow diagram that microcomputer receives the process that the rf data bag of USB transmission handles;
Figure 13 is the process flow diagram that receives the process that buffered data handles in the processing procedure of Figure 12.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one: a kind of experiment teaching auxiliary management method, with the mobile communication experiment is example, as Fig. 1, Fig. 3, Fig. 4, Fig. 8, Fig. 9 and shown in Figure 10, it is realized by following device: 30 experimental provisions sides in a laboratory all are provided with an experimental signal processing module 1, 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, and instructor's desk is provided with an experimental signal administration module 2 and a microcomputer 3 that is connected with experimental signal administration module 2, 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 CH372 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 and is connected with usb circuit 22.Whole process may further comprise the steps: one, gather experimental signal by the signal acquisition probe 4 that its input end is provided with at corresponding sampled point by being arranged on the other experimental signal processing module of experimental provision 1; Two, promote by 11 pairs of signal shapings that collect of experimental signal pre-process circuit and driving, handle according to the following steps then: 1. to single-chip microcomputer and 12 initialization of high-speed a/d change-over circuit; 2. read toggle switch 6, determine the transmitting channel that experiment end wireless transceiver circuit 5 is current according to being provided with of toggle switch 6; 3. according to transmitting channel initialization experiment end wireless transceiver circuit 5; 4. start high-speed a/d change-over circuit 12; 5. read the experimental data signal after the analog to digital conversion; 6. judge that a frame buffered data is completely denied to be then to continue next step, otherwise to return step 5.; 7. the buffered data packet that transmits after packing is held wireless transceiver circuit 5 to experiment; Three, experiment end wireless transceiver circuit 5 sends the rf data bag at current transmitting channel; Four, receive the rf data bag of experiment end wireless transceiver circuit 5 transmissions and be sent to experimental signal administration module 2 by management end wireless transceiver circuit 7; Five, by the experimental signal administration module rf data bag that the management end wireless transceiver circuit sends is imported microcomputer by usb circuit, detailed process may further comprise the steps: 1. pair usb circuit initialization; 2. the receiving channels initialization management end wireless transceiver circuit that is provided with according to microcomputer; 3. read the rf data bag that management end wireless transceiver circuit 7 sends; 4. the rf data bag that receives is sent to microcomputer by usb circuit; Six, microcomputer receives the rf data bag of usb circuit input and be reduced into picture signal on display.Comprise and may further comprise the steps: 1. pair usb circuit initialization, usage data buffer is uploaded mode, monitors USB plug state, data query is set at interval, and with the numbering zero setting of current received RF packet; 2. determine the current receiving channels of management end wireless transceiver circuit; 3. determine the channel number of experimental provision according to receiving channels; 4. the judgment data query time is then to continue step 5 to not, otherwise continues step 4; 5. read a collection of buffered data; 6. judging whether buffered data reads finishes, and is then to continue next step, otherwise returns step 4; 7. receive buffered data and handle, detailed process may further comprise the steps: 71. read the data of a rf data bag; 72. judge whether the numbering of rf data bag is correct, be then to forward step 74 to, otherwise forward step 73 to; 73. return 71 again after the rf data packet number of current reception put 0; 74. the rf data packet number of current reception is added 1, takes out Wave data; 75. judge whether to be combined into the complete display waveform data of a frame, be then to continue step 76, otherwise return step 71; 76. the display waveform data, and the numbering of the rf data bag of current reception put 0, begin the processing of new display waveform data then; Whether dispose 77. judge buffered data, otherwise return step 71, be then to finish;
The detailed process of step 76 display waveform data may further comprise the steps: the scale that 1) a screen display waveform is set according to current acquisition rate; 2) initialization shows that step-length is 1; Whether be 1:1 show, be then to continue step 4), otherwise first reading displayed step-length continues step 4) again if 3) judging current; 4) according to 200 data that show the step-length reading displayed; 5) judge whether to read 200 data of a screen, be then to continue step 6), otherwise return step 4); 6) removing a last screen shows; 7) according to showing step-length adjustment display scale; 8) 200 byte datas with a screen display waveform are normalized to-1 to 1; 9) video data is connected in turn with line segment from the 1st to the 200th.Whether the experiment instruction teacher compares the judgment experiment data correct picture signal and the correct option that is stored in the experiment answer database in the microcomputer then.
Embodiment two: other 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.And by the shaping of experimental signal pre-process circuit and the process handled of the signal after drive promoting comprise data buffering process and data read process, the data buffering process may further comprise the steps: A, to single-chip microcomputer and the initialization of high-speed a/d change-over circuit; B, read toggle switch, determine the current transmitting channel of experiment end wireless transceiver circuit according to being provided with of toggle switch; C, according to transmitting channel initialization experiment end wireless transceiver circuit; D, startup high-speed a/d change-over circuit; E, programmable logic device (PLD) address counter counting; F, judge that whether the programmable logic device (PLD) counter is counted fullly, is then to forward step I to, otherwise continues step G; G, the output of high-speed a/d change-over circuit data allow; H, high speed static RAM write data, return step e then; I, A/D EOC, the high-speed a/d change-over circuit stops output data, and the programmable logic device (PLD) address counter stops counting; Data read process may further comprise the steps: J, programmable logic device (PLD) are pressed the single-chip microcomputer signal and are produced data address; K, single-chip microcomputer begin to prepare reading of data; L, programmable logic device (PLD) control high speed static RAM are put into data line with the data of corresponding address; M, single-chip microcomputer reading of data; N, judge that whether the frame data in the high speed static RAM are all read away, are then to continue next step, otherwise turn back to step K; 0, transmits buffered data to experiment end wireless transceiver circuit.The experiment end data signal processing circuit 13 of present embodiment is provided with and can produces clock control circuit, the address takes place, the programmable logic device (PLD) of commutation circuit and data-signal commutation circuit and be used to make the A/D conversion work in the required high speed static RAM of direct memory access mode, programmable logic device (PLD) is set to following fourth gear by the frequency division acquisition rate: when signal frequency during greater than 100KHz, acquisition rate is 20MHz, when signal frequency is 10KHz ~ 100KHz, acquisition rate is 2MHz, when signal frequency is 1KHz ~ 10KHz, acquisition rate is 200KHz, when signal frequency during less than 1KHz, acquisition rate is 20KHz, the high-speed a/d change-over circuit is in analog-to-digital process, signal frequency according to the experimental provision sampled point, choose a kind of in the fourth gear acquisition rate as actual samples speed, 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), i.e. the control timing of A/D conversion without CPU, reading of data, data-storing (depositing static RAM (SRAM) in) is 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 provision 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, method of the present invention 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 provisions 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 provision 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, method of the present invention 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 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 up to 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 experiment teaching auxiliary management method is characterized in that it may further comprise the steps: one, gather experimental signal by the signal acquisition probe that its input end is provided with at corresponding sampled point by being arranged on the other experimental signal processing module of experimental provision; Two, by the experimental signal processing module signal that collects is handled, and the channel number of every experimental provision being set by the channel number generating means that is arranged on the experimental signal processing module, the packet after will packing then is sent to experiment end wireless transceiver circuit; Three, select corresponding transmitting channel to send the rf data bag according to channel number; Four, receive the rf data bag of experiment end wireless transceiver circuit transmission and be sent to the experimental signal administration module by the management end wireless transceiver circuit; Five, by the experimental signal administration module rf data bag that the management end wireless transceiver circuit sends is imported microcomputer by usb circuit; Six, microcomputer receives the rf data bag of usb circuit input and be reduced into picture signal on display, then with the experiment answer database that is stored in the microcomputer in correct option compare the judgment experiment data whether correct, and judge the pairing experimental provision of rf data bag that receives according to the channel number of rf data bag.
2, a kind of experiment teaching auxiliary management method according to claim 1 is characterized in that in the step 2 signal that collects handled and comprises by the shaping of experimental signal pre-process circuit and drive and promote, carried out analog to digital conversion and handled by the experimental data signal of experiment end data signal processing circuit after to analog to digital conversion by the signal of high-speed a/d change-over circuit after to shaping.
3, a kind of experiment teaching auxiliary management method according to claim 2, 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, and the process that the signal after being promoted by shaping of experimental signal pre-process circuit and driving is handled may further comprise the steps: 1. to single-chip microcomputer and the initialization of high-speed a/d change-over circuit; 2. read toggle switch, determine the current transmitting channel of experiment end wireless transceiver circuit according to being provided with of toggle switch; 3. according to transmitting channel initialization experiment end wireless transceiver circuit; 4. start the high-speed a/d change-over circuit; 5. read the experimental data signal after the analog to digital conversion; 6. judge that a frame buffered data is completely denied to be then to continue next step, otherwise to return step 5.; 7. transmit buffered data to experiment end wireless transceiver circuit.
4, a kind of experiment teaching auxiliary management method according to claim 2, 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, by the shaping of experimental signal pre-process circuit and the process handled of the signal after drive promoting comprise data buffering process and data read process, the data buffering process may further comprise the steps: A, to single-chip microcomputer and the initialization of high-speed a/d change-over circuit; B, read toggle switch, determine the current transmitting channel of experiment end wireless transceiver circuit according to being provided with of toggle switch; C, according to transmitting channel initialization experiment end wireless transceiver circuit; D, startup high-speed a/d change-over circuit; E, programmable logic device (PLD) address counter counting; F, judge that whether the programmable logic device (PLD) counter is counted fullly, is then to forward step I to, otherwise continues step G; G, the output of high-speed a/d change-over circuit data allow; H, high speed static RAM write data, return step e then; I, A/D EOC, the high-speed a/d change-over circuit stops output data, and the programmable logic device (PLD) address counter stops counting; Data read process may further comprise the steps: J, programmable logic device (PLD) are pressed the single-chip microcomputer signal and are produced data address; K, single-chip microcomputer begin to prepare reading of data; L, programmable logic device (PLD) control high speed static RAM are put into data line with the data of corresponding address; M, single-chip microcomputer reading of data; N, judge that whether the frame data in the high speed static RAM are all read away, are then to continue next step, otherwise turn back to step K; 0, transmits buffered data to experiment end wireless transceiver circuit.
5, a kind of experiment teaching auxiliary management method according to claim 4, it is characterized in that being set to following fourth gear: when signal frequency during greater than 100KHz by the frequency division acquisition rate of programmable logic device (PLD), acquisition rate is 20MHz, when signal frequency is 10KHz ~ 100KHz, acquisition rate is 2MHz, when signal frequency is 1KHz ~ 10KHz, acquisition rate is 200KHz, when signal frequency during less than 1KHz, acquisition rate is 20KHz, the high-speed a/d change-over circuit according to the signal frequency of experimental provision sampled point, is chosen a kind of as actual samples speed in the fourth gear acquisition rate in analog-to-digital process.
6, a kind of experiment teaching auxiliary management method according to claim 1, it is characterized in that by the experimental signal administration module rf data bag that the management end wireless transceiver circuit sends being imported microcomputer by usb circuit in the step 5, detailed process comprises to the usb circuit initialization, according to the receiving channels initialization management end wireless transceiver circuit of microcomputer setting, read rf data bag that management end wireless transceiver circuit 7 sends and the rf data bag that receives is sent to microcomputer by usb circuit.
7, a kind of experiment teaching auxiliary management method according to claim 1, it is characterized in that rf data bag that microcomputer reception usb circuit is imported in the step 6 and the process that is reduced into picture signal on display may further comprise the steps: 1. pair usb circuit initialization, usage data buffer is uploaded mode, monitor USB plug state, data query is set at interval, and with the numbering zero setting of current received RF packet; 2. determine the current receiving channels of management end wireless transceiver circuit; 3. determine the channel number of experimental provision according to receiving channels; 4. the judgment data query time is then to continue step 5 to not, otherwise continues step 4; 5. read a collection of buffered data; 6. judging whether buffered data reads finishes, and is then to continue next step, otherwise returns step 4; 7. receiving buffered data handles.
8, a kind of experiment teaching auxiliary management method according to claim 7, it is characterized in that the process that step 7 reception buffered data is handled may further comprise the steps: 71. read the data of a rf data bag; 72. judge whether the numbering of rf data bag is correct, be then to forward step 74 to, otherwise forward step 73 to; 73. return step 71 again after the rf data packet number of current reception put 0; 74. the rf data packet number of current reception is added 1, takes out Wave data; 75. judge whether to be combined into the complete display waveform data of a frame, be then to continue step 76, otherwise return step 71; 76. the display waveform data, and the numbering of the rf data bag of current reception put 0, begin the processing of new display waveform data then; Whether, be then finish, otherwise return step 71 77. judge buffered data if disposing.
9, a kind of experiment teaching auxiliary management method according to claim 8 is characterized in that the process of step 76 display waveform data may further comprise the steps: the scale that 1) a screen display waveform is set according to current acquisition rate; 2) initialization shows that step-length is 1; Whether be 1:1 show, be then to continue step 4), otherwise first reading displayed step-length continues step 4) again if 3) judging current; 4) according to 200 data that show the step-length reading displayed; 5) judge whether to read 200 data of a screen, be then to continue step 6), otherwise return step 4); 6) removing a last screen shows; 7) according to showing step-length adjustment display scale; 8) 200 byte datas with a screen display waveform are normalized to-1 to 1; 9) video data is connected in turn with line segment from the 1st to the 200th.
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| CNB2007100700723A CN100495472C (en) | 2007-07-18 | 2007-07-18 | Experiment teaching auxiliary management method |
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| CNB2007100700723A CN100495472C (en) | 2007-07-18 | 2007-07-18 | Experiment teaching auxiliary management method |
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| CN102289968A (en) * | 2011-08-26 | 2011-12-21 | 重庆理工大学 | Teaching device for game experiment and method |
| CN102289961B (en) * | 2011-09-08 | 2013-08-14 | 北京联合大学 | Examination system for experiment courses |
| CN104809946A (en) * | 2015-04-26 | 2015-07-29 | 李力 | Intelligent teaching and checking system for electrical control experimental training |
| CN106898172B (en) * | 2017-04-26 | 2019-07-09 | 北京科技大学 | A kind of system and method for assistant experiment teaching |
| CN106898177B (en) * | 2017-04-27 | 2019-12-06 | 河南理工大学 | On-line simulation and automatic evaluation method for single-chip microcomputer experimental hardware |
| TWI654862B (en) | 2017-12-29 | 2019-03-21 | 新唐科技股份有限公司 | Signal management device and signal management method |
| CN114170879A (en) * | 2021-12-10 | 2022-03-11 | 西安电子科技大学 | Full wireless interactive experimental teaching system |
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