CN211742427U - Teaching training platform device - Google Patents
Teaching training platform device Download PDFInfo
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- CN211742427U CN211742427U CN202020114358.8U CN202020114358U CN211742427U CN 211742427 U CN211742427 U CN 211742427U CN 202020114358 U CN202020114358 U CN 202020114358U CN 211742427 U CN211742427 U CN 211742427U
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Abstract
The utility model discloses a teaching training platform device, which comprises a signal injection simulation unit and a sequential logic simulation unit, wherein the signal injection simulation unit is used for simulating a functional circuit board; the signal injection simulation unit comprises a main chip circuit, a signal output circuit and a signal detection circuit; the signal output end of the signal detection circuit is connected with the signal input end of the main chip circuit; the signal input end of the signal output circuit is connected with the signal output end of the main chip circuit; the main chip circuit is suitable for outputting at least one path of adjustable direct-current voltage signal, at least one path of adjustable square wave signal and at least one path of level signal; the signal output circuit is suitable for processing the adjustable direct-current voltage signal or the adjustable square wave signal or the level signal output by the main chip circuit and injecting the processed signal into key points of the circuit board with corresponding functions. The utility model discloses can realize emulating the functional circuit board well, realize carrying out the purpose of functions such as circuit detection, failure analysis to the functional circuit board.
Description
Technical Field
The utility model relates to a real platform device of instructing of teaching.
Background
At present, scientific and technological development is changing day by day, social and economic levels are continuously improved, electronic equipment is commonly used, and accordingly, the rigid requirement of people on electronic product maintenance service is met, and the coverage range of the maintenance industry is wide. The mastering of circuit principles and maintenance skills are particularly important. Therefore, vocational schools which mainly take technical workers as tasks are developed, and related professions and courses are set up. Many kinds of work in electronic information category professional catalogues issued in national professional standards in China relate to IT service maintenance, and computer maintenance workers (professional code 6-08-05-01), household electrical product maintenance workers (professional code 4-07-10-02), office equipment maintenance workers (professional code 4-07-11-01), electronic assembly workers (professional code 6-05-03-04), household electronic product maintenance workers (professional code 4-07-10-01) and the like relate to electronic product maintenance. Meanwhile, in order to further improve the skill level, major competitions are set in vocational colleges in China, and more than ten items such as computer detection maintenance and data recovery, installation, debugging, operation and maintenance of a distributed photovoltaic system, application and maintenance of internet of things technology, integration and maintenance of a communication and control system (high-speed rail), installation, debugging and application of an electronic circuit, installation and debugging of a wind-solar hybrid power generation system, intelligent modification and integration technology of a manufacturing unit, application of industrial robot technology and the like are required to be provided for students.
Because the foundation of students in the vocational schools is poor, the logical thinking is not strong, and how to realize the visual and intuitive teaching is a difficult problem for teachers in each vocational school.
At present, the teaching status of national vocational schools about the circuit is as follows: according to teaching materials, a circuit principle is explained, then components are identified and read, and then welding is practiced. The theory and practice integrated teaching is difficult to achieve, the teaching efficiency is low, and the circuit maintenance skill is difficult to achieve the national professional skill standard.
Under the background, through the analysis and research of various typical circuits, complex circuit items are decomposed to form a functional circuit board with a certain function for practical training teaching, so that a good practical training effect can be achieved, but five main technical problems are brought.
Firstly, the method comprises the following steps: and (4) signal injection.
Because the complex circuit is decomposed into the circuit board with a certain function, how the signal of the circuit is injected and how the function is simulated, the original method is to fixedly output a high level and a low level by pulling up and down the resistor, so that the signal is not changed, the simulation of the signal cannot be carried out, and the true connotation of decomposing and teaching the complex circuit project is lost.
Secondly, the method comprises the following steps: sequential logic.
How to analyze the sequential logic of the signals related to the functional circuit board, if a circuit is specially designed on the functional circuit board to realize the sequential and logic of the circuit, the cost is high, and the circuit is not universal.
Thirdly, the method comprises the following steps: and (6) scoring maintenance.
After the student finishes the maintenance of the functional circuit board, how to grade. Since the class capacity is about 40 people generally and the teaching time is limited, obviously, a teacher cannot test the functional circuit boards of students one by one.
Fourthly: and (5) information feedback.
The current concept of vocational teaching is to train students to independently explore the capability of independent learning. After the student finishes the maintenance of function circuit board, need feedback information, feedback information comes from.
Fifth, the method comprises the following steps: combining functions.
After the teaching and training of the functional circuit boards of the complex circuit are completed, the functional circuit boards are required to be combined to complete the combination function, and therefore a test platform is required to test the combination function.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide a real platform device of instructing of teaching, it can realize simulating the functional circuit board well, realizes carrying out the purpose of functions such as circuit detection, failure analysis to the functional circuit board.
In order to solve the technical problem, the technical scheme of the utility model is that: a teaching training platform device comprises a signal injection simulation unit and a sequential logic simulation unit, wherein the signal injection simulation unit is used for simulating a functional circuit board; wherein the content of the first and second substances,
the signal injection simulation unit comprises a main chip circuit, a signal output circuit and a signal detection circuit;
the signal output end of the signal detection circuit is connected with the signal input end of the main chip circuit;
the signal input end of the signal output circuit is connected with the signal output end of the main chip circuit;
the main chip circuit is suitable for outputting at least one path of adjustable direct-current voltage signal, at least one path of adjustable square wave signal and at least one path of level signal;
the signal output circuit is suitable for processing the adjustable direct-current voltage signal or the adjustable square wave signal or the level signal output by the main chip circuit and injecting the processed signal into key points of the corresponding functional circuit board;
the signal detection circuit is suitable for collecting direct-current voltage signals generated by key points of the circuit board with corresponding functions, the frequency of generated waveform signals and generated level signals and feeding the frequency and the level signals back to the main chip circuit;
the sequential logic simulation analysis unit comprises a trigger and drive circuit and a programmable logic circuit which are connected with each other;
after the corresponding trigger of the corresponding functional circuit board, the corresponding trigger signal is transmitted to the programmable logic circuit through the trigger and drive circuit, and the programmable logic circuit outputs the corresponding drive signal to the corresponding functional circuit board through the trigger and drive circuit according to the corresponding trigger signal to execute the corresponding logic control.
Further, the signal detection circuit includes:
at least one direct current voltage acquisition circuit which acquires direct current voltage signals generated by key points of the circuit board with corresponding functions and feeds the direct current voltage signals back to the main chip circuit;
at least one frequency acquisition circuit for acquiring the frequency of waveform signals generated by key points of the circuit board with corresponding functions and feeding the frequency back to the main chip circuit;
and the level signal acquisition circuit is used for acquiring level signals generated by key points of the circuit board with corresponding functions and feeding the level signals back to the main chip circuit.
Further, the direct current voltage acquisition circuit includes:
the input end is connected with a voltage division circuit of a key point of the corresponding functional circuit board;
and the input end of the voltage limiting amplifier is connected with the output end of the voltage division circuit, and the output end of the voltage limiting amplifier is connected with the main chip circuit.
Further, the frequency acquisition circuit includes:
the input end is connected with a frequency signal acquisition circuit of a key point of the corresponding functional circuit board;
the pulse signal generating circuit is connected with the output end of the frequency signal acquisition circuit so as to generate a corresponding pulse signal according to the signal acquired by the frequency signal acquisition circuit;
the frequency dividing circuit is connected with the pulse signal generating circuit and the main chip circuit, the frequency dividing circuit is suitable for dividing the frequency of the corresponding pulse signal generated by the pulse signal generating circuit, and the main chip circuit is suitable for capturing the signal after frequency division by the frequency dividing circuit.
Further, the signal output circuit includes:
at least one adjustable direct current voltage injection circuit which is suitable for processing the adjustable direct current voltage signal output by the main chip circuit and injecting the processed adjustable direct current voltage signal into key points of the circuit board with corresponding functions;
at least one adjustable square wave signal injection circuit which is suitable for processing the adjustable square wave signal output by the main chip circuit and injecting the processed adjustable square wave signal into key points of the corresponding functional circuit board;
and the level signal injection circuit is suitable for processing the level signal output by the main chip circuit and injecting the processed level signal into key points of the corresponding functional circuit board.
Further, the trigger and drive circuit includes:
at least one input photoelectric coupling circuit for transmitting the corresponding trigger signal to the programmable logic circuit;
and at least one logic control drive circuit which drives and controls the corresponding functional circuit board to execute corresponding logic control according to the corresponding drive signal output by the programmable logic circuit.
The serial communication circuit is connected with the main chip circuit and the programmable logic circuit, and is suitable for the main chip circuit or the programmable logic circuit to communicate with the outside.
The host computer is connected with the main chip circuit and the programmable logic circuit through the serial communication circuit respectively, and is suitable for data interactive transmission with the main chip circuit and the programmable logic circuit through the serial communication circuit respectively.
And the system further comprises a JTAG debugging interface circuit, wherein the JTAG debugging interface circuit is respectively connected with the upper computer and the main chip circuit.
The signal detection circuit, the signal output circuit and the triggering and driving circuit are suitable for being connected with the functional circuit board through the interface bus extension circuit.
After the technical scheme is adopted, the utility model discloses following beneficial effect has:
1. in the real teaching of instructing about the circuit, can select typical circuit and corresponding functional circuit board according to theoretical teaching outline, required injection signal and sequential logic can by the utility model discloses a real platform device of instructing of teaching provides, realizes the emulation of functional circuit board function, and the teaching image is directly perceived.
2. In the real standard of more complicated circuit project, can decompose into several functional circuit boards with complicated circuit and maintain real standard, each functional circuit board can be interlinked, then inserts through interface bus extension circuit the utility model discloses a real platform device of instructing of teaching tests to the accessible host computer is maintained and is graded, improves real efficiency of instructing.
3. Because the utility model discloses a real platform device of instructing of teaching's openness, interactivity, the student can independently study according to the data of platform test, independently explore.
4. The utility model discloses a real teaching training platform device can write through the ladder diagram as the real teaching of instructing of PLC, will write the ladder diagram that is good through serial communication module and download programmable logic circuit, removes the actuating mechanism of control function control panel.
5. The utility model discloses a real platform device of instructing of teaching can regard as the network equipment of grading of national relevant electronic product maintenance project contest, and it is more objective, more scientific to grade.
Drawings
Fig. 1(a) is a schematic block diagram of a teaching and training platform device of the present invention;
fig. 1(b) is a schematic block diagram of a dc voltage acquisition circuit according to the present invention;
fig. 1(c) is a schematic block diagram of the frequency acquisition circuit of the present invention;
fig. 1(d) is a schematic block diagram of a trigger and driving circuit of the present invention;
fig. 1(e) is a schematic block diagram of a signal output circuit of the present invention;
fig. 1(f) is a schematic block diagram of the signal detection circuit of the present invention;
fig. 2 is a circuit diagram of the power supply circuit of the present invention;
fig. 3 is a circuit diagram of a main chip circuit of the present invention;
fig. 4(a) is a circuit diagram of the voltage dividing circuit in the multi-path dc voltage collecting circuit of the present invention;
fig. 4(b) is a circuit diagram of a voltage limiting amplifier in the multi-path dc voltage collecting circuit of the present invention;
fig. 5(a) is a circuit diagram of a frequency signal acquisition circuit in the multi-path frequency acquisition circuit of the present invention;
fig. 5(b) is a circuit diagram of a pulse signal generating circuit in the multi-path frequency acquisition circuit of the present invention;
fig. 5(c) is a circuit diagram of a frequency dividing circuit in the multi-path frequency acquisition circuit of the present invention;
fig. 6 is a circuit diagram of the multi-path level signal acquisition circuit of the present invention;
fig. 7(a) is a circuit diagram of the multi-path adjustable dc voltage injection circuit of the present invention;
fig. 7(b) is a circuit diagram of the multi-path adjustable square wave signal injection circuit and the multi-path level signal injection circuit of the present invention;
fig. 8 is a circuit diagram of a programmable logic circuit of the present invention;
fig. 9 is a circuit diagram of a multi-path input photoelectric coupling circuit in the trigger and driving circuit of the present invention;
fig. 10 is a circuit diagram of a multi-channel logic control driving circuit in the triggering and driving circuit of the present invention;
fig. 11 is a circuit diagram of a serial port communication circuit of the present invention;
fig. 12 is a circuit diagram of a JTAG debug interface circuit of the present invention;
fig. 13 is a circuit diagram of the interface bus extension circuit of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1 to 13, a teaching training platform device includes a signal injection simulation unit and a sequential logic simulation unit for simulating a functional circuit board 10; wherein the content of the first and second substances,
the signal injection simulation unit comprises a main chip circuit 11, a signal output circuit 12 and a signal detection circuit 13;
the signal output end of the signal detection circuit 13 is connected with the signal input end of the main chip circuit 11;
the signal input end of the signal output circuit 12 is connected with the signal output end of the main chip circuit 11;
the main chip circuit 11 is adapted to output at least one path of adjustable direct-current voltage signal, at least one path of adjustable square wave signal and at least one path of level signal;
the signal output circuit 12 is adapted to process the adjustable dc voltage signal or the adjustable square wave signal or the level signal output by the main chip circuit 11 and inject the processed signal into the key point of the corresponding functional circuit board;
the signal detection circuit 13 is adapted to collect and feed back to the main chip circuit 11 the direct-current voltage signal generated by the key point of the corresponding functional circuit board, the frequency of the generated waveform signal and the generated level signal;
the sequential logic simulation analysis unit comprises a trigger and drive circuit 21 and a programmable logic circuit 22 which are connected with each other;
after the corresponding trigger of the corresponding functional circuit board 10, the corresponding trigger signal is transmitted to the programmable logic circuit 22 through the trigger and driving circuit 21, and the programmable logic circuit 22 outputs the corresponding driving signal to the corresponding functional circuit board 10 through the trigger and driving circuit 21 according to the corresponding trigger signal to execute the corresponding logic control.
In this embodiment, the main chip circuit 11 may be an STM32F103ZET6 chip, and its specific parameters are as follows: 512K flash memory; 3 12 bit A/D converters, 1us conversion time, 21 input channels; 2 12-bit D/A converters; 12 DMA controllers; 112 fast I/O ports; 11 timers; 13 communication interfaces, an external 8MHZ crystal oscillator, and an internal time sequence of 72 MHZ.
The programmable logic circuit 22 can be an STM32F103RDT6 chip, and has 8-path high-low level triggering, 8-path transistor switch output and maximum output current 1A, logic programming of the programmable logic circuit writes a PLC ladder diagram program on a PC according to specific requirements of a functional circuit board, and the PLC ladder diagram program is downloaded to the chip STM32F103RDT6 chip through a serial communication circuit 3, so that sequential logic control is provided for the functional circuit board, and the actual function of the combined functional circuit board is realized.
As shown in fig. 1(a) and fig. 11, the teaching practical training platform device further includes a serial communication circuit 3, the serial communication circuit 3 is connected to the main chip circuit 11 and the programmable logic circuit 22, and the serial communication circuit 3 is suitable for the main chip circuit 11 or the programmable logic circuit 22 to communicate with the outside. The serial communication circuit 3 can be a serial chip CH340G, in the serial communication circuit 3, a serial line is connected with an MINI-USB interface, and an STM32F103ZET6 chip and an STM32F103RDT6 chip share one serial chip CH340G, so that the serial communication circuit is realized through a J4 jumper.
As shown in fig. 1(a), the teaching practical training platform device further includes an upper computer 4, the upper computer 4 is connected to the main chip circuit 11 and the programmable logic circuit 22 through the serial communication circuit 3, and the upper computer 4 is adapted to perform data interactive transmission with the main chip circuit 11 and the programmable logic circuit 22 through the serial communication circuit 3.
As shown in fig. 1(f), the signal detection circuit 13 includes:
at least one direct current voltage acquisition circuit 13a for acquiring direct current voltage signals generated by key points of the circuit board with corresponding functions and feeding back the direct current voltage signals to the main chip circuit 11;
at least one frequency acquisition circuit 13b for acquiring the frequency of waveform signals generated by key points of the circuit board with corresponding functions and feeding back the frequency to the main chip circuit 11;
and at least one level signal acquisition circuit 13c for acquiring level signals generated by key points of the circuit board with corresponding functions and feeding back the level signals to the main chip circuit 11.
In this embodiment, the signal detection circuit 13 includes 16 dc voltage acquisition circuits 13a, 2 frequency acquisition circuits 13b, and 16 level signal acquisition circuits 13 c.
As shown in fig. 1(b), fig. 4(a) and fig. 4(b), the dc voltage collection circuit 13a includes:
the input end is connected with the voltage division circuit 13a1 of the key point of the corresponding functional circuit board;
the input end of the voltage limiting amplifier 13a2 is connected with the output end of the voltage dividing circuit 13a1, and the output end of the voltage limiting amplifier 13a2 is connected with the main chip circuit 11.
Specifically, the voltage limiting amplifier 13a2 may be, among others, an LM 324.
Specifically, as shown in fig. 4(a) and 4(b), the measurement range of the direct-current voltage detection of the signal detection circuit 13 is 0-6V, the precision is 0.002V, and the description is given by taking one direct-current voltage acquisition circuit 13a as an example, AI0 is a certain key measurement point of the functional circuit board, AU0 points are sampled by the voltage division circuit 13a1 composed of 100K resistor R621 and resistor R622, the maximum 3.6V of a/D conversion voltage of the STM32F103ZET6 chip is considered, AU0 sampling voltage is sent to the LM324 to be converted into a0 voltage, the LM324 simultaneously plays a role in voltage limiting, the a0 voltage is sent to the PA0 port of the STM32F103ZET6 chip to be converted into 12-bit a/D, and is sent to the upper computer 4 through the serial port communication circuit 3 to be displayed. The measured Voltage is converted into a digital quantity formula of Voltage 4096/3.3.
As shown in fig. 1(c) and fig. 5(a) to 5(c), the frequency acquisition circuit 13b includes:
the input end is connected with the frequency signal acquisition circuit 13b1 of the key point of the corresponding functional circuit board;
the pulse signal generating circuit 13b2, the pulse signal generating circuit 13b2 is connected with the output end of the frequency signal collecting circuit 13b1, so as to generate corresponding pulse signals according to the signals collected by the frequency signal collecting circuit 13b 1;
a frequency dividing circuit 13b3, the frequency dividing circuit 13b3 being connected to the pulse signal generating circuit 13b2 and the main chip circuit 11, the frequency dividing circuit 13b3 being adapted to frequency-divide the respective pulse signals generated by the pulse signal generating circuit 13b2, the main chip circuit 11 being adapted to capture the signals frequency-divided by the frequency dividing circuit 13b 3. The frequency dividing circuit 13b3 may be implemented with a 74HC 390.
In the present embodiment, the pulse signal generating circuit 13b2 may be 74HC 14.
In this embodiment, the frequency acquisition circuit 13b can measure the frequency of waveforms such as sine waves, triangular waves, square waves, etc., and detect a signal with a minimum amplitude of 1Vpp, a measurement range of 1Hz to 20MHz, and a maximum measurement error of 3%. Taking one of the frequency acquisition circuits 13b as an example for explanation, FI0 is a certain key measurement point of the functional circuit board, and a pulse signal is generated by 74HC14 through a frequency signal acquisition circuit 13b1 composed of CH1, CH2 and QH 1. The pulse signal generating circuit 13b2 realizes three schmitt triggers and phase inversion by using 74HC14, and as can be seen from fig. 5(b), the amplified signal from the frequency signal acquiring circuit 13b1 enters from pin 1 of 74HC14, passes through 1A → 1Y, 2A → 2Y and 3A → 3Y for three schmitt triggers and phase inversion, and finally converts the slowly varying input signal into a clear and jitter-free signal and outputs from pin 6. The pulse shaped signal FF0 is fed to a 74HC390 for frequency division, the 74HC390 having eight master-slave flip-flops and additional gates to form two independent 4-bit counters, each of which comprises two parts: the "divide-by-2 count portion" and the "divide-by-5 count portion", each counter in turn having a clear input and a clock input. It can implement a cycle length equal to any cumulative multiple of division by 2, division by 5, or even division by 100, and can be concatenated into a decimal counter or a binary-quinary counter to implement two-system numerical outputs, respectively. Since each counting stage has a parallel output, the system timing signal can take any factor of the input counting frequency. The platform adopts a 100-frequency division coefficient to obtain a PA6F signal, and the signal enters a PA6 pin of an STM32F103ZET6 chip to capture and measure frequency.
Fig. 6 shows a specific circuit diagram of the level signal acquisition circuit 13c, where the level signal may be a high level signal or a low level signal, the detection signal is a high level signal when the voltage is greater than 1.4V, and is a low level signal when the voltage is less than 1.2V, and the hysteresis voltage is 0.2V. Taking one path of level signal acquisition circuit 13c as an example for explanation, HI0 is a certain detection point of the functional circuit board, and is subjected to voltage division and sampling through a resistor R653 and a resistor R654 to obtain PE0, and enters a port PE0 of an STM32F103ZET6 chip for high and low level judgment, and a D619 voltage regulator tube plays a role in protecting a port PE 0.
As shown in fig. 1(e) and fig. 7(a) - (b), the signal output circuit 12 includes:
at least one adjustable DC voltage injection circuit 12a which is suitable for processing the adjustable DC voltage signal output by the main chip circuit 11 and injecting the processed signal into the key points of the circuit board with corresponding functions;
at least one adjustable square wave signal injection circuit 12b which is suitable for processing the adjustable square wave signal output by the main chip circuit 11 and injecting the processed adjustable square wave signal into key points of the circuit board with corresponding functions;
and at least one level signal injection circuit 12c which is suitable for processing the level signal output by the main chip circuit 11 and injecting the processed level signal into key points of the corresponding functional circuit board.
In this embodiment, the signal output circuit 12 includes 2 adjustable dc voltage injection circuits 12a, 4 adjustable square wave signal injection circuits 12b, and 4 level signal injection circuits 12 c.
The 2-path adjustable direct-current voltage injection circuit 12a is 20-level adjustable direct-current voltage, each level is 0.25V, the output range is 0-5V, and the current is 200 mA. By taking one path as an example for explanation, D0 is connected to a PA4 chip port of STM32F103ZET6, an adjustable direct current voltage D0 is output by utilizing a 12-bit D/A function, driving current amplification is carried out through an amplifier LM358, the maximum output current is 200mA, and a DU0 signal is injected into a functional circuit board to realize simulation;
4 paths of adjustable square wave signals are injected into the circuit 12b, the frequency is 1-10K, the 5 levels are adjustable, and the peak value is 3.3V. Taking one path as an example for explanation, an adjustable square wave is generated from an STM32F103ZET6 chip port PB6 through interrupt control of a chip internal timer, and is output to a certain point of a functional circuit board through a resistor R711 to realize signal injection simulation;
4-channel level signal injection circuit 12c, high level 3.3V and low level 0V. By taking one path as an example for explanation, the STM32F103ZET6 chip port PA8 generates high and low levels through the control of an internal chip output register, and the high and low levels are output to a certain point of a functional circuit board through a resistor R712 to realize signal injection simulation.
As shown in fig. 1(d), 9, and 10, the trigger and drive circuit 21 includes:
at least one input photoelectric coupling circuit 21a for transmitting a corresponding trigger signal to the programmable logic circuit 22;
at least one logic control driving circuit 21b for driving and controlling the corresponding functional circuit board to execute the corresponding logic control according to the corresponding driving signal output by the programmable logic circuit 22.
In this embodiment, the triggering and driving circuit 21 includes 8 input optical coupling circuits 21a and 8 logic control driving circuits 21 b;
taking one of the paths as an example, pulling down the level X0 triggers, the photo-electric tube OC311 acts, the level X00 changes from high level to low level, the X00 signal is sent to the PC6 pin of the STM32F103RDT6 chip, and through the internal program control of the chip, the total 8 output signals O00-O07 can be arbitrarily controlled, thereby completing the function of a logic matrix. Now, assume that O00 is controlled to be at a low level, the photo-electric tube OC411 operates, QI0 outputs a high level, in order to increase the driving capability, QI0 is converted into an OT0 low level signal through UIN2303A, so that the photo-electric tube OC412 operates, Y0 forms a loop with the ground through the triode Q411, and when the functional circuit board execution mechanism circuit is connected to Y0, the execution operation of the functional circuit board is realized.
As shown in fig. 1(a) and fig. 12, the teaching training platform device further includes a JTAG debug interface circuit 5, and the JTAG debug interface circuit 5 is connected to the upper computer 4 and the main chip circuit 11, respectively.
As shown in fig. 1(a) and 13, the teaching and training platform device further includes an interface bus extension circuit 6, and the signal detection circuit 13, the signal output circuit 12 and the trigger and drive circuit 21 are adapted to be connected to the functional circuit board 10 through the interface bus extension circuit 6.
In this embodiment, as shown in fig. 2, the power supply circuit is further included, the power supply circuit provides a full board power supply voltage, the voltage input is 9-24V, 5V power supply is generated through the LM2596SX-5.0 chip, and the 5V power supply is generated through the AMS1117-3.3V power supply.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (10)
1. A teaching training platform device is characterized by comprising a signal injection simulation unit and a sequential logic simulation unit, wherein the signal injection simulation unit is used for simulating a functional circuit board (10); wherein the content of the first and second substances,
the signal injection simulation unit comprises a main chip circuit (11), a signal output circuit (12) and a signal detection circuit (13);
the signal output end of the signal detection circuit (13) is connected with the signal input end of the main chip circuit (11);
the signal input end of the signal output circuit (12) is connected with the signal output end of the main chip circuit (11);
the main chip circuit (11) is suitable for outputting at least one path of adjustable direct-current voltage signal, at least one path of adjustable square wave signal and at least one path of level signal;
the signal output circuit (12) is suitable for processing the adjustable direct-current voltage signal or the adjustable square wave signal or the level signal output by the main chip circuit (11) and injecting the processed signal into a key point of a corresponding functional circuit board;
the signal detection circuit (13) is suitable for collecting direct-current voltage signals generated by key points of the circuit board with corresponding functions, the frequency of generated waveform signals and generated level signals and feeding the frequency and the level signals back to the main chip circuit (11);
the sequential logic simulation analysis unit comprises a trigger and drive circuit (21) and a programmable logic circuit (22) which are connected with each other;
the trigger and drive circuit (21) is suitable for transmitting a corresponding trigger signal generated after the corresponding functional circuit board (10) is correspondingly triggered to the programmable logic circuit (22), and the programmable logic circuit (22) is suitable for outputting a corresponding drive signal to the corresponding functional circuit board (10) through the trigger and drive circuit (21) according to the corresponding trigger signal so that the corresponding functional circuit board (10) executes corresponding logic control.
2. The teaching and training platform device of claim 1,
the signal detection circuit (13) includes:
at least one direct current voltage acquisition circuit (13a) which acquires direct current voltage signals generated by key points of the circuit board with corresponding functions and feeds the direct current voltage signals back to the main chip circuit (11);
at least one frequency acquisition circuit (13b) for acquiring the frequency of waveform signals generated by key points of the circuit board with corresponding functions and feeding back the frequency to the main chip circuit (11);
and at least one level signal acquisition circuit (13c) for acquiring level signals generated by key points of the circuit board with corresponding functions and feeding back the level signals to the main chip circuit (11).
3. The teaching and training platform device of claim 2,
the DC voltage collection circuit (13a) includes:
the input end is connected with a voltage division circuit (13a1) of the key point of the corresponding functional circuit board;
the input end of the voltage limiting amplifier (13a2) is connected with the output end of the voltage dividing circuit (13a1), and the output end of the voltage limiting amplifier (13a2) is connected with the main chip circuit (11).
4. The teaching and training platform device of claim 2,
the frequency acquisition circuit (13b) comprises:
the input end is connected with a frequency signal acquisition circuit (13b1) of the key point of the corresponding functional circuit board;
the pulse signal generating circuit (13b2), the pulse signal generating circuit (13b2) is connected with the output end of the frequency signal collecting circuit (13b1) to generate corresponding pulse signals according to the signals collected by the frequency signal collecting circuit (13b 1);
a frequency dividing circuit (13b3), the frequency dividing circuit (13b3) being connected to the pulse signal generating circuit (13b2) and the main chip circuit (11), the frequency dividing circuit (13b3) being adapted to frequency-divide the respective pulse signals generated by the pulse signal generating circuit (13b2), the main chip circuit (11) being adapted to capture the signals frequency-divided by the frequency dividing circuit (13b 3).
5. The teaching and training platform device of claim 1,
the signal output circuit (12) includes:
at least one adjustable direct current voltage injection circuit (12a) which is suitable for processing the adjustable direct current voltage signal output by the main chip circuit (11) and injecting the processed adjustable direct current voltage signal into key points of the corresponding functional circuit board;
at least one adjustable square wave signal injection circuit (12b) which is suitable for processing the adjustable square wave signal output by the main chip circuit (11) and injecting the processed adjustable square wave signal into key points of the corresponding functional circuit board;
and at least one level signal injection circuit (12c) which is suitable for processing the level signal output by the main chip circuit (11) and injecting the processed level signal into key points of the corresponding functional circuit board.
6. The teaching and training platform device of claim 1,
the trigger and drive circuit (21) comprises:
at least one input photoelectric coupling circuit (21a) for transmitting a corresponding trigger signal to the programmable logic circuit (22);
at least one logic control drive circuit (21b) for driving and controlling the corresponding functional circuit board to execute corresponding logic control according to the corresponding drive signal output by the programmable logic circuit (22).
7. The teaching and training platform device of claim 1,
the serial communication circuit (3) is connected with the main chip circuit (11) and the programmable logic circuit (22), and the serial communication circuit (3) is suitable for the main chip circuit (11) or the programmable logic circuit (22) to communicate with the outside.
8. The teaching and training platform device of claim 7,
the device is characterized by further comprising an upper computer (4), wherein the upper computer (4) is connected with the main chip circuit (11) and the programmable logic circuit (22) through the serial communication circuit (3), and the upper computer (4) is suitable for data interaction transmission between the main chip circuit (11) and the programmable logic circuit (22) through the serial communication circuit (3).
9. The teaching and training platform device of claim 8,
the device is characterized by further comprising a JTAG debugging interface circuit (5), wherein the JTAG debugging interface circuit (5) is respectively connected with the upper computer (4) and the main chip circuit (11).
10. The teaching and training platform device of claim 8,
the multifunctional circuit board is characterized by further comprising an interface bus extension circuit (6), wherein the signal detection circuit (13), the signal output circuit (12) and the trigger and drive circuit (21) are suitable for being connected with the functional circuit board (10) through the interface bus extension circuit (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020114358.8U CN211742427U (en) | 2020-01-18 | 2020-01-18 | Teaching training platform device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020114358.8U CN211742427U (en) | 2020-01-18 | 2020-01-18 | Teaching training platform device |
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| Publication Number | Publication Date |
|---|---|
| CN211742427U true CN211742427U (en) | 2020-10-23 |
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| CN202020114358.8U Expired - Fee Related CN211742427U (en) | 2020-01-18 | 2020-01-18 | Teaching training platform device |
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| CN (1) | CN211742427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823145A (en) * | 2021-11-25 | 2021-12-21 | 成都运达科技股份有限公司 | Motor train unit linkage simulation training system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823145A (en) * | 2021-11-25 | 2021-12-21 | 成都运达科技股份有限公司 | Motor train unit linkage simulation training system and method |
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