CN103886794A - Intelligent digital electronic experimental box - Google Patents
Intelligent digital electronic experimental box Download PDFInfo
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- CN103886794A CN103886794A CN201410122179.8A CN201410122179A CN103886794A CN 103886794 A CN103886794 A CN 103886794A CN 201410122179 A CN201410122179 A CN 201410122179A CN 103886794 A CN103886794 A CN 103886794A
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Abstract
The invention discloses an intelligent digital electronic experiment box which comprises a computer interface, an upper computer, a frequency output functional module, an electric level indicating functional module, an electric level output functional module, a decoding displaying functional module and a hexadecimal circuit. All the functional modules are uniformly controlled by a microcontroller, and therefore reliability and flexibility of the experimental box are enhanced. Through the computer interface on the experimental box, the experimental box can communicate with the upper computer in a full-duplex mode, analysis and processing of data are facilitated, and the upper computer can also control the experimental box.
Description
Technical field
The present invention relates to a kind of digital and electronic experimental box for teaching, can supply Fundamental Digital Circuit experiment, and there is more expanded function.
Background technology
Intelligent digital electronic experimental box is indispensable experimental apparatus in the experimental teaching of electricity specialty Fundamental Digital Circuit, and the quality of its performance directly affects the effect of teaching.At present, general digital experiment case all can comprise the modules such as level indicating, level output, coding display, square-wave signal.But the circuit of these modules is separate, its function is realized separately by discrete circuit and device thereof, and such as square-wave output signal has independent signal generating circuit, logic switch has independent de-twitter circuit, and data switch and logic switch are separated from each other simultaneously.The modules of experimental box cannot form unified entirety and manage, and the reliability of instrument and performance all can not get ensureing.The data such as the logic level obtaining in experiment often need to be observed by oscillograph, analyzing and processing inconvenience.
Summary of the invention
The invention provides a kind of intelligent digital electronic experimental box, each functional module is controlled by microcontroller is unified, has strengthened reliability and the dirigibility of experimental box.Computer interface on case by experiment, experimental box can also communicate with host computer, and on experimental box, the data obtained can directly show by host computer and analyze, and host computer can also carry out the control to experimental box simultaneously.
A kind of intelligent digital electronic experimental box, described experimental box comprises middle section and peripheral regions, described middle section is IC receptacle area, described peripheral regions multiple modules that distribute, comprise computer interface, host computer, frequency output module, level indicating module, level output module, coding display module, sexadecimal output module; Above-mentioned modules is controlled by microcontroller is unified.
Described computer interface is USB interface, via USB interface, realizes communicating by letter of experimental box and host computer.
Described host computer intercoms mutually with microcontroller, the data that obtain on experimental box are directly sent to host computer, can also send command operating experimental box from host computer.
The square-wave signal of described frequency output module is provided by the clock system of microcontroller.
Described frequency output module comprises reference frequency output and adjustable frequency output, and adjustable frequency obtains phase shift 90 degree outputs via microcontroller processing, forms orthogonal coding, thereby can realize speed measuring function with former output.
In described level output module, the debounce of logic button is directly realized by microcontroller; In described level output module, logic button provides high-quality negative edge or rising edge to trigger in the moment pressing down, and after pressing down, provides a constant high level or low level, has realized uniting two into one of data switch and logic switch.
The pin of the pin of the negative electrode of the level indicating light emitting diode of described level output module, the charactron of sexadecimal output module and the charactron of frequency output module is all connected with the 8 bit parallel output terminals of 74HC595 with the negative electrode of cps indication light diode, 74HC595 common shift clock signal and store clock signal, by the cascade of serial input mouth and be finally connected to an input and output pin of microcontroller; And the pin of the negative electrode of the level indicating light emitting diode of described level indicating module, coding display circuit charactron is connected into the parallel input port of another group 74HC595, another input and output pin that serial port is cascaded to.By the sealing in and go out shift LD function of 74HC595, send boolean's array via serial port, can unify to refresh demonstration data.
In described level indicating module and the control of coding display module, the interrupt source using the level of input as microcontroller, sends instruction by interrupt routine, realizes the control to corresponding level indication light diode and charactron demonstration.
The charactron button of the logic button of described level output module, the charactron button of sexadecimal output module and frequency output module is all connected with the parallel input end of 74HC165,74HC165 common clock input signal and shift signal, and by the cascade of serial delivery outlet, the parallel signal serial of reading on keyboard is sent into microcontroller, the Data Concurrent that microcontroller processing obtains goes out instruction, controls the demonstration of corresponding light emitting diode and charactron.
Described level output module is all connected with the parallel output terminal of 74HC595 with the level delivery outlet of sexadecimal output module, 74HC595 common shift clock signal and store clock signal, the cascade of serial input mouth is also finally connected to an input and output pin of microcontroller; By the sealing in and go out shift LD function of 74HC595, microcontroller sends boolean's array via serial port, unifiedly refreshes level output.
The invention has the beneficial effects as follows:
1, each functional module is controlled by microcontroller is unified, has strengthened reliability and dirigibility;
2, logic switch and the digital switch of traditional number electricity experimental box are united two into one, saved resource;
3, can carry out full-duplex communication with host computer, facilitate the processing of experimental data and the demonstration of experimentalist logic waveform, also can utilize host computer to carry out the control to experimental box, realize the intellectuality of experimental box.
Accompanying drawing explanation
Fig. 1 is the structural representation of intelligent digital electronic experimental box;
Fig. 2 is coding display module diagram;
Fig. 3 is level indicating module diagram;
Fig. 4 is sexadecimal output module schematic diagram;
Fig. 5 is level output module schematic diagram;
Fig. 6 is the reference frequency output module schematic diagram in frequency output module;
Fig. 7 is the adjustable frequency output module schematic diagram in frequency output module;
In figure, computer interface 1, level indicating module 2, coding display module 3, sexadecimal output module 4, level output module 5, frequency output module 6, loudspeaker 7, element region 8, direct supply 9, IC receptacle area 10, host computer 11, level jack 12, level indicating light emitting diode 13, code translator 14, charactron 15, charactron button 16, reference frequency output plughole 17, earth jack 18, adjustable frequency output plughole 19, phase shift frequency output plughole 20, cps indication light diode 21, cps selection key 22, frequency range selection key 23, the reverse output plughole 24 of level, logic button 25.
Embodiment
Be further described below in conjunction with accompanying drawing.
Shown in Fig. 1, experimental box comprises middle section and peripheral regions, described middle section is IC receptacle area 10, described peripheral regions multiple modules that distribute, comprise computer interface 1, host computer 11, frequency output module 6, level indicating module 2, level output module 5, coding display module 3, sexadecimal output module 4; Control by microcontroller is unified with upper module.IC receptacle area 10 provides various chips socket; Direct supply 9 is experimental box power supply; The element such as resistance, electric capacity that element region 8 provides experiment to use; Loudspeaker 7 is in order to produce voice signal; Computer interface 1 is USB interface, and experimental box is connected with host computer 11; Host computer 11 can be communicated by letter with slave computer, and realizes instrument control.
Shown in Fig. 2, charactron 15,14, four level jacks 12 of code translator form a unit of a coding display module 3.Level jack 12 is used for receiving high level or the low level of input, forms tetrad code, and tetrad code is converted into logic level output by code translator 14, as the interrupt source of microcontroller, sends instruction by interrupt routine.And the pin of the charactron 15 of coding display module 3 is connected with the 8 bit parallel output terminals of 74HC595,74HC595 common shift clock signal and store clock signal, by the cascade of serial input mouth and be finally connected to an input and output pin of microprocessor.Utilize sealing in and going out shift LD function of 74HC595, during microprocessor enters, having no progeny to connect via serial port sends boolean's array, the unified demonstration that refreshes charactron.
Shown in Fig. 3, level jack 12 and light emitting diode 13 form a unit of a level indicating module 2.Level jack 12 is used for receiving high level or the low level of input, and the interrupt source using level input as microcontroller, sends instruction by interrupt routine.And the negative electrode of level indicating light emitting diode 13 is connected with the 8 bit parallel output terminals of 74HC595,74HC595 common shift clock signal and store clock signal, by the cascade of serial input mouth and be finally connected to an input and output pin of microprocessor.Utilize sealing in and going out shift LD function of 74HC595, during microprocessor enters, having no progeny to connect via serial port sends boolean's array, the unified light emitting diode light on and off state that refreshes.
Shown in Fig. 4, charactron 15, two charactron buttons 16 and four level jacks 12 form a unit of sexadecimal output module 4.Charactron button 16 is in order to the numerical value of the sexadecimal number that charactron 15 is set shows, and four level jacks 12 are exported the sexadecimal number of setting with binary mode.
Shown in Fig. 5, logic button 25, level indicating light emitting diode 13, level jack 12 and the reverse output plughole 24 of level form a unit of level output module 5.Logic button 25 provides rising edge or negative edge triggering, high level or low level.Level indicating light emitting diode 13 is indicated level height, and level jack 12 can be exported level signal, and the reverse output plughole 24 of level is oppositely exported level signal.
Shown in Fig. 6, earth jack 18 and reference frequency output plughole 17 form the reference frequency output of frequency output module 6.Earth jack 18 is in order to line-to-ground, and reference frequency output plughole 17 is exported the square-wave signal of fixed reference frequency.
Shown in Fig. 7, adjustable frequency output plughole 19, phase shift frequency output plughole 20, earth jack 18 forms the output of the adjustable frequency signal of frequency output module 6; The frequency that cps indication light diode 21, three charactrons 15, six charactron buttons 16, cps selection key 22, frequency range selection keys 23 form the adjustable frequency signal of frequency output module 6 shows and part is set.Adjustable frequency output plughole 19 is exported the square-wave signal of adjustable frequency, the adjustable frequency square wave of phase shift frequency output plughole 20 output transposition 90 degree, the frequency numerical value of output frequency is set by charactron button 16, the unit of frequency numerical value of cps indication light diode 21 in order to indicate charactron to show, cps selection key 22 is in order to select the unit of output frequency, and frequency range selection key 23 can be controlled the numerical range of output frequency.
Shown in Fig. 4, Fig. 5, Fig. 7, the charactron button 16 of the logic button 25 of level output module 5, the charactron button 16 of sexadecimal output module 4 and frequency output module 6 is all connected with the parallel input end of 74HC165,74HC1655 common clock input signal and shift signal, and by the cascade of serial delivery outlet, the parallel signal serial of being read by button is sent into microprocessor, the data that microprocessor processes obtains unified instruction of sending control level indication light diode 13, cps indication light diode 21 and charactron 16.And the pin of the charactron 16 of the negative electrode of the level indicating light emitting diode 13 of level output module 5, sexadecimal output module 4 and the charactron 16 of frequency output module 6 are connected with the 8 bit parallel output terminals of 74HC595 with cps indication light diode 21 pins, 74HC595 common shift clock signal and store clock signal, the cascade of serial input mouth is also finally connected to an input and output pin of microprocessor.Utilize sealing in and going out shift LD function of 74HC595, microprocessor receives after button data, sends boolean's array via serial port, the unified demonstration data that refresh.Level output module 5 and sexadecimal output module 4 show that data simultaneously also will be by corresponding level output refreshing, in like manner level jack 12 is connected with the 8 bit parallel output terminals of 74HC595,74HC595 common shift clock signal and store clock signal, the cascade of serial input mouth is also finally connected to another input and output pin of microprocessor, microprocessor receives after button data, send boolean's array via serial port, the unified level that refreshes is exported.
Shown in Fig. 6, Fig. 7, the square-wave signal of the main output reference frequency of frequency output module 6 and adjustable frequency.Square-wave signal is provided by the clock system of microcontroller, and the functions such as the clock source process of microcontroller self frequency division, frequency multiplication can obtain abundant square-wave signal, can meet the requirement of reference frequency and adjustable frequency completely.Square-wave signal is processed and also can be obtained the signal output that phase shift 90 is spent through microcontroller, forms orthogonal coding, thereby can realize speed measuring function with former output.
Claims (10)
1. an intelligent digital electronic experimental box, it is characterized in that: described experimental box comprises middle section and peripheral regions, described middle section is IC receptacle area (10), described peripheral regions multiple modules that distribute, comprise computer interface (1), host computer (11), frequency output module (6), level indicating module (2), level output module (5), coding display module (3), sexadecimal output module (4); Above-mentioned modules is controlled by microcontroller is unified.
2. intelligent digital electronic experimental box according to claim 1, is characterized in that: described computer interface (1) is USB interface, via USB interface, realizes communicating by letter of experimental box and host computer (11).
3. intelligent digital electronic experimental box according to claim 1, it is characterized in that: described host computer (11) intercoms mutually with microcontroller, the data that obtain on experimental box are directly sent to host computer (11), can also send command operating experimental box from host computer (11).
4. intelligent digital electronic experimental box according to claim 1, is characterized in that: the square-wave signal of described frequency output module (6) is provided by the clock system of microcontroller.
5. intelligent digital electronic experimental box according to claim 1, it is characterized in that: described frequency output module (6) comprises reference frequency output and adjustable frequency output, adjustable frequency obtains phase shift 90 degree outputs via microcontroller processing, form orthogonal coding with former output, thereby can realize speed measuring function.
6. intelligent digital electronic experimental box according to claim 1, is characterized in that: in described level output module (5), the debounce of logic button (25) is directly realized by microcontroller; In described level output module (5), logic button (25) provides high-quality negative edge or rising edge to trigger in the moment pressing down, and after pressing down, provides a constant high level or low level, has realized uniting two into one of data switch and logic switch.
7. intelligent digital electronic experimental box according to claim 1, it is characterized in that: the negative electrode of the level indicating light emitting diode (13) of described level output module (5), charactron (15) pin of sexadecimal output module (4), and charactron (15) pin of frequency output module (6) and the negative electrode of cps indication light diode (21) are all connected with the 8 bit parallel output terminals of 74HC595, 74HC595 common shift clock signal and store clock signal, also finally be connected to an input and output pin of microcontroller by the cascade of serial input mouth, and charactron (15) pin of level indicating light emitting diode (13) negative electrode of described level indicating module (2), coding display module (3) is connected into the parallel input port of another group 74HC595, serial port is cascaded to another input and output pin, sealing in and going out shift LD function by 74HC595, send boolean's array via serial port, can unify to refresh demonstration data.
8. intelligent digital electronic experimental box according to claim 1, it is characterized in that: in described level indicating module (2) and the control of coding display module (3), interrupt source using level input as microcontroller, send instruction by interrupt routine, realize the control that corresponding level indication light diode (13) and charactron (15) are shown.
9. intelligent digital electronic experimental box according to claim 1, it is characterized in that: the logic button (25) of described level output module (5), the charactron button (16) of sexadecimal output module (4) and the charactron button (16) of frequency output module (6) are all connected with the parallel input end of 74HC165, 74HC165 common clock input signal and shift signal, and by the cascade of serial delivery outlet, the parallel signal serial of reading on keyboard is sent into microcontroller, the Data Concurrent that microcontroller processing obtains goes out instruction, control the demonstration of corresponding light emitting diode and charactron.
10. intelligent digital electronic experimental box according to claim 1, it is characterized in that: described level output module (5) is all connected with the parallel output terminal of 74HC595 with the level delivery outlet of sexadecimal output module (4), 74HC595 common shift clock signal and store clock signal, the cascade of serial input mouth is also finally connected to an input and output pin of microcontroller; By the sealing in and go out shift LD function of 74HC595, microcontroller sends boolean's array via serial port, unifiedly refreshes level output.
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| CN201410122179.8A CN103886794A (en) | 2014-03-30 | 2014-03-30 | Intelligent digital electronic experimental box |
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Patent Citations (10)
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| KR100769013B1 (en) * | 2006-10-30 | 2007-10-23 | 임화영 | The integrated device for electrical and electronics circuit experiment |
| CN201156341Y (en) * | 2007-11-30 | 2008-11-26 | 北京化工大学 | Multifunctional experiment development and teaching apparatus based on DSP chip |
| KR20090108915A (en) * | 2008-04-14 | 2009-10-19 | 사단법인 한국전자정보통신산업진흥회 | Embedd Digital Kit Of Electric Device For Education |
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Application publication date: 20140625 |