CN203165316U - Comprehensive experiment instrument for computer hardware teaching - Google Patents
Comprehensive experiment instrument for computer hardware teaching Download PDFInfo
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- CN203165316U CN203165316U CN 201320185792 CN201320185792U CN203165316U CN 203165316 U CN203165316 U CN 203165316U CN 201320185792 CN201320185792 CN 201320185792 CN 201320185792 U CN201320185792 U CN 201320185792U CN 203165316 U CN203165316 U CN 203165316U
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- single chip
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Abstract
The utility model provides a comprehensive experiment instrument for computer hardware teaching. The comprehensive experiment instrument is conducive to setting of a comprehensive hardware practice course for students majoring in computer information. An STC12C5A60S2 single chip microcomputer is used as a core, and a D/A conversion circuit, a keyboard interface circuit, an LED digital display circuit, a signal measuring circuit, a signal generating circuit, a voltage conversion circuit and the like are respectively extended on three 8-bit parallel ports of the STC12C5A60S2 single chip microcomputer. A PC is used as an upper computer and the single chip microcomputer is used as a lower computer. A user program is downloaded online into the single chip microcomputer through an RS232 serial port to be run, and circuit function switching is carried out by using a rotary coding switch. Functions of voltage measurement, current measurement, resistance measurement, a numerical control voltage source, temperature display, a signal generator, a pulse counter and the like can be achieved through circuit design and online programming. No programmer or simulator is needed so that the experimental cost is reduced.
Description
Technical field :
The utility model relates to a kind of computer hardware teaching comprehensive test instrument, is used for the basic signal testing in laboratory, signal generation.
Background technology :
Need to be equipped with multiple testing tool in the electric information class specialized laboratory of colleges and universities, as multimeter, D.C. regulated power supply, oscillograph, signal generator etc., and the instrument of purchasing mostly is single functional test or signal generating Instrument, the kind that needs is many, being not easy to the laboratory puts and uses, and total expenses is higher, needs to spend bigger manpower and materials in addition and carries out maintenance and repair.At present, yet there are no the comprehensive tester that the multiple test of collection and signal betide one.
Summary of the invention :
The purpose of this utility model is the defective at prior art, and a kind of computer hardware teaching comprehensive test instrument is provided.
The purpose of this utility model is achieved through the following technical solutions.
The utility model is core with the STC12C5A60S2 single-chip microcomputer, on its 38 bit parallel mouths, expand D/A change-over circuit, keyboard interface circuit, the digital display circuit of LED, circuitry for signal measurement, signal generating circuit, voltage conversion circuit etc. respectively, at instrument panel rotary coding switch is installed and is used for the circuit function switching.Concrete function can be integrated into the digital test of an opening and the multiple function apparatus of debugging usefulness with multiple function by mcu programming is realized.
The utility model is designed to an open platform in function, and namely the instrument all functions all can realize by circuit design and online programming, can be computerized information class Major at this platform and offers hardware synthesis practice course.During Course Exercise with PC as host computer, single-chip microcomputer is as slave computer, links to each other with the RS232 serial ports between host computer and the slave computer.Can user program be downloaded into single-chip microcomputer operation directly at the custom system online downloading mode of ISP during programming.
The beneficial effects of the utility model are: satisfy laboratory basic test and signal source function, improved the efficient of separate unit experiment instrument, reduce kind and the quantity of lab investigation and signal generator instrument; Offer hardware synthesis practice course for computer major student, can save related experiment platform, programmable device and emulator, reduce experimental cost.
Description of drawings :
Fig. 1 is general structure synoptic diagram of the present utility model.
Fig. 2 is the utility model computer-controlled program block diagram.
Fig. 3 is circuit design principle figure of the present utility model.
Embodiment :
For further disclosing the technical solution of the utility model, below in conjunction with elaborating by embodiment with accompanying drawing.
The utility model comprises functional modules such as Single Chip Microcomputer (SCM) system, serial communication, keyboard and demonstration, temperature acquisition, impulse meter, waveform generator, voltage measurement, current measurement, resistance measurement, power conversion.Single-chip microcomputer is STC12C5A60S2, communicates by MAX232 serial ports and PC, realizes the online download of user program.Carry out the circuit function switching with the rotary coding switch that is installed on the instrument panel, use the keyboard to set up time, show measurement data with 6 LED charactrons.Adopt the DS18B20 digital temperature sensor to measure temperature.Realize waveform generator and impulse meter with D/A converter DAC0832 and operational amplifier LM324, can realize waveform outputs such as square wave, triangular wave, sawtooth wave, sine wave by programming, change output delay time, can change its output frequency.Traffic light controller shows the time with charactron respectively, makes signal lamp with red, yellow, green light emitting diode, and its circuit is made of jointly latch and current-limiting resistance.Use in the circuit+5V ,+12V is converted to by chip LM317 ,-5V and-12V voltage is converted to by MAX660 and MC34063 chip respectively.Numerical control direct voltage source and current source are to convert controlled digital signal to simulating signal by DAC0832, and recycling operational amplifier LM324 is amplified to the signal that expectation obtains with simulating signal.The measurement of voltage table is that voltage to be measured is directly given in the single-chip microcomputer of band AD conversion, and the numerical values recited after the conversion is exactly the value of voltage to be measured.The reometer principle is to convert electric current to be measured to magnitude of voltage through AD converter by series resistor, thereby calculates the size of electric current to be measured.The measuring resistance circuit mainly is made of operational amplifier, and the output end voltage of amplifier equates with the ratio of resistance R 19 with ratio and the testing resistance of the voltage of inverting input, according to the voltage of output terminal, can calculate the size of testing resistance value.
This comprehensive test instrument is an open platform, and all functions can realize that all the student who can be computer major at this platform offers hardware synthesis practice course by circuit design and online programming.Concrete achievable task has: design circuit schematic diagram and printed circuit diagram, carry out circuit plate-making; Finish welding and the debugging of circuit board; With assembly language or C language compilation program of lower computer, comprise data acquisition and handling procedure, keyboard monitoring and show written-out program, PID or FUZZY ALGORITHMS FOR CONTROL program, serial communication program etc.; Each functional module program is carried out system integration and test, with keyboard program its function is coupled together, can select different functions by button; User program is downloaded in the program storage of STC single-chip microcomputer at last, works alone after it is powered on.
Claims (1)
1. computer hardware teaching comprehensive test instrument, it is characterized in that: be core with the STC12C5A60S2 single-chip microcomputer, on 38 bit parallel mouths of single-chip microcomputer, expand D/A change-over circuit, keyboard interface circuit, the digital display circuit of LED, circuitry for signal measurement, signal generating circuit and voltage conversion circuit respectively, at instrument panel rotary coding switch is installed, being used for circuit function switches, with PC as host computer, single-chip microcomputer is as slave computer, links to each other with the RS232 serial ports between host computer and the slave computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320185792 CN203165316U (en) | 2013-04-12 | 2013-04-12 | Comprehensive experiment instrument for computer hardware teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320185792 CN203165316U (en) | 2013-04-12 | 2013-04-12 | Comprehensive experiment instrument for computer hardware teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203165316U true CN203165316U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320185792 Expired - Fee Related CN203165316U (en) | 2013-04-12 | 2013-04-12 | Comprehensive experiment instrument for computer hardware teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203165316U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105279823A (en) * | 2014-07-24 | 2016-01-27 | 张娜 | Multifunctional anti-theft door |
| CN107340745A (en) * | 2017-08-29 | 2017-11-10 | 吉林大学 | A kind of data acquisition based on MCU, manipulation, Transmission system |
-
2013
- 2013-04-12 CN CN 201320185792 patent/CN203165316U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105279823A (en) * | 2014-07-24 | 2016-01-27 | 张娜 | Multifunctional anti-theft door |
| CN107340745A (en) * | 2017-08-29 | 2017-11-10 | 吉林大学 | A kind of data acquisition based on MCU, manipulation, Transmission system |
| CN107340745B (en) * | 2017-08-29 | 2020-08-21 | 吉林大学 | Data acquisition, control and transmission system based on MCU |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20140412 |