CN114783238A - Short-wave radio station teaching system capable of conducting fault diagnosis training - Google Patents
Short-wave radio station teaching system capable of conducting fault diagnosis training Download PDFInfo
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- CN114783238A CN114783238A CN202210608531.3A CN202210608531A CN114783238A CN 114783238 A CN114783238 A CN 114783238A CN 202210608531 A CN202210608531 A CN 202210608531A CN 114783238 A CN114783238 A CN 114783238A
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- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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Abstract
The invention relates to a short-wave radio station teaching system, in particular to a short-wave radio station teaching system capable of performing fault diagnosis training. It includes teaching device, and this teaching device has short-waveband radio station function. The fault simulation device is characterized by further comprising a fault module and a test module, wherein the teaching device and the fault module are both in adaptive connection with the test module, the teaching device sends a normal signal to the test module, and the fault module sends a simulated fault signal to the test module. The teaching system has multiple functions and can meet the conventional teaching requirements.
Description
Technical Field
The invention relates to a short-wave radio station teaching system, in particular to a short-wave radio station teaching system capable of performing fault diagnosis training.
Background
The short wave radio station is a radio communication device with a working wavelength of 100-10 m (frequency of 3-30 MHz/3000-30000 kHz). The method is mainly used for transmitting voice, constant amplitude messages and frequency shift messages. The short-wave radio station teaching system is a teaching device capable of realizing the function of the short-wave radio station, so that students can conveniently learn the knowledge of the short-wave radio station. At present, the function of short-wave radio station can only be realized to traditional short-wave radio station teaching system, does not have the function of the common trouble of simulation short-wave radio station, and the function is less. Moreover, the function of simulating common faults of the short-wave radio station is not available, and the fault diagnosis training of students cannot be carried out, so that the conventional teaching requirements cannot be met.
Disclosure of Invention
The invention aims to provide a short-wave radio station teaching system capable of performing fault diagnosis training, which has multiple functions and can meet the conventional teaching requirements.
In order to solve the problems, the following technical scheme is provided:
the short-wave radio station teaching system capable of fault diagnosis training comprises a teaching device, wherein the teaching device has a short-wave radio station function. The fault simulation device is characterized by further comprising a fault module and a test module, wherein the teaching device and the fault module are both in adaptive connection with the test module, the teaching device sends a normal signal to the test module, and the fault module sends a simulated fault signal to the test module.
The teaching device comprises a short-wave radio receiving demonstrating board and a short-wave radio transmitting demonstrating board, wherein the short-wave radio receiving demonstrating board and the short-wave radio transmitting demonstrating board are PCBA boards. The fault module comprises a first fault control module and a second fault control module, the first fault control module is integrated on the short-wave radio station receiving teaching board, and the second fault control module is integrated on the short-wave radio station sending teaching board; the testing module comprises a first testing interface and a second testing interface, the first testing interface is integrated on the short-wave radio receiving demonstrating board, and the second testing interface is integrated on the short-wave radio transmitting demonstrating board.
The short wave radio station receiving teaching board is integrated with a first signal source module, a high-frequency amplifier, a down converter, a first oscillator, a first band-pass filter, a demodulator and a first low-frequency amplifier; the first signal source module, the high-frequency amplifier, the down converter, the first oscillator, the first band-pass filter, the demodulator and the first low-frequency amplifier are all connected with one first test interface, and the first fault control module is in adaptive connection with all the first test interfaces. The first signal source module is connected with the high-frequency amplifier, the high-frequency amplifier and the first oscillator are connected with the down converter through signal transmitting lines, the down converter is connected with the first band-pass filter through the signal transmitting lines, the first band-pass filter is connected with the demodulator through the signal transmitting lines, and the demodulator is connected with the first low-frequency amplifier through the signal transmitting lines.
The short-wave radio transceiver demonstration board comprises a second signal source module, a second low-frequency amplifier, a low-frequency filter, a modulator, a frequency mixer, a second band-pass filter, a high-frequency power amplifier and a second oscillator. The second signal source module, the second low-frequency amplifier, the low-frequency filter, the modulator, the mixer, the second band-pass filter, the high-frequency power amplifier and the second oscillator are all connected with one second test interface. The second fault control module is in adaptive connection with all the second test interfaces; the second low-frequency amplifier is connected with the low-frequency filter through a signal transmitting line, the low-frequency filter is connected with the modulator through a signal transmitting line, the modulator and the second oscillator are connected with the frequency mixer through a signal transmitting line, the frequency mixer is connected with the second band-pass filter through a signal transmitting line, the second band-pass filter is connected with the high-frequency power amplifier through a signal transmitting line, and the high-frequency power amplifier is connected with the transmitting antenna.
And signal flow demonstration lamps are uniformly distributed on the signal transmitting line.
The first fault control module is a first touch control screen.
The second fault control module is a second touch control screen
By adopting the scheme, the method has the following advantages:
according to the short-wave radio station teaching system capable of conducting fault diagnosis training, the teaching device and the fault module are both in adaptive connection with the test module, the teaching device sends a normal signal to the test module, and the fault module sends a simulated fault signal to the test module. During the use, during normal teaching, the teaching device sends normal signal to the test module, reads the signal of test module through oscilloscope, and the student can know the frequency and the range of the normal signal of shortwave radio station during operation. When fault diagnosis training is needed, a simulated fault signal is sent to the test module through the fault module, the signal of the test module is read through the oscilloscope, a student can know the frequency and the amplitude of the fault signal when the short-wave radio station works, and fault diagnosis training can be carried out on the student through setting the fault type corresponding to the frequency and the amplitude of the fault signal. Therefore, the short-wave radio station teaching system has multiple functions, can be used for carrying out fault diagnosis training on students, and can further meet the conventional teaching requirements.
Drawings
FIG. 1 is a schematic diagram of a short wave radio teaching system capable of fault diagnosis training of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the short wave radio teaching system capable of performing fault diagnosis training of the present invention includes a teaching device 1, a fault module, and a test module. The teaching apparatus 1 has a short-band station function. Teaching device 1 and trouble module all with test module adaptation connection, teaching device 1 sends normal signal to the test module, and the trouble module sends the simulation trouble signal to the test module.
The teaching device 1 comprises a short wave radio receiving teaching board 4 and a short wave radio transmitting teaching board 6, wherein the short wave radio receiving teaching board 4 and the short wave radio transmitting teaching board 6 are PCBA boards. The fault module comprises a first fault control module and a second fault control module, the first fault control module is integrated on the short-wave radio receiving and demonstrating board 4, and the second fault control module is integrated on the short-wave radio receiving and demonstrating board 6. The test module comprises a first test interface 2 and a second test interface 7, wherein the first test interface 2 is integrated on the short-wave radio receiving demonstrating board 4, and the second test interface 7 is integrated on the short-wave radio receiving demonstrating board 6.
A first signal source module, a high-frequency amplifier, a down converter, a first oscillator, a first band-pass filter, a demodulator and a first low-frequency amplifier are integrated on the short-wave radio station receiving teaching board 4. The first signal source module is a low-frequency signal transmitter.
The first signal source module, the high-frequency amplifier, the down converter, the first oscillator, the first band-pass filter, the demodulator and the first low-frequency amplifier are all connected with one first test interface 2, and the first fault control module is in adaptive connection with all the first test interfaces 2. The first signal source module is connected with the high-frequency amplifier, the high-frequency amplifier and the first oscillator are connected with the down converter through the signal transmitting line 3, the down converter is connected with the first band-pass filter through the signal transmitting line 3, the first band-pass filter is connected with the demodulator through the signal transmitting line 3, and the demodulator is connected with the first low-frequency amplifier through the signal transmitting line 3. The first fault control module is a first touch control screen. The short wave radio station letter reception demonstrating board 4 is integrated with a first power module for supplying power to other modules on the short wave radio station letter reception demonstrating board 4.
The short-wave radio transceiver demonstration board comprises a second signal source module, a second low-frequency amplifier, a low-frequency filter, a modulator, a frequency mixer, a second band-pass filter, a high-frequency power amplifier and a second oscillator. The second signal source module is a low-frequency signal transmitter. The second signal source module, the second low-frequency amplifier, the low-frequency filter, the modulator, the mixer, the second band-pass filter, the high-frequency power amplifier and the second oscillator are all connected with one second test interface 7. And the second fault control module is in adaptive connection with all the second test interfaces 7. The second low-frequency amplifier is connected with the low-frequency filter through a signal transmitting line 3, the low-frequency filter is connected with the modulator through the signal transmitting line 3, the modulator and the second oscillator are connected with the frequency mixer through the signal transmitting line 3, the frequency mixer is connected with the second band-pass filter through the signal transmitting line 3, the second band-pass filter is connected with the high-frequency power amplifier through the signal transmitting line 3, and the high-frequency power amplifier is connected with the transmitting antenna. And the second fault control module is a second touch control screen, and a second power module is integrated on the short-wave radio transmitting demonstrating board 6 and used for supplying power to other modules on the short-wave radio transmitting demonstrating board 6.
In order to facilitate understanding of the trend of the signals, signal flow demonstration lamps 5 are uniformly distributed on the signal transmitting line 3.
In order to realize the communication between the two teaching boards, a loudspeaker is integrated on the short-wave radio station message receiving teaching board 4, and the first low-frequency amplifier is electrically connected with the loudspeaker. The short wave radio transmitting demonstrating board 6 is integrated with a loudspeaker microphone, and the microphone is electrically connected with the second low-frequency amplifier.
When the test device is used, the first power supply module and the second power supply module are connected with a power supply, and the first test interface 2 and the second test interface 7 are externally connected with an oscilloscope. The oscilloscope horizontal spread was set to 250 us.
When short-wave radio station receiving teaching is carried out, the first signal source module simultaneously sends signals to the corresponding first test interface 2 and the corresponding high-frequency amplifier, and a student can know that the signals are AM amplitude modulation signals about 200mV through an oscilloscope, and the carrier frequency is 10.7 MHz.
The AM modulation switch of the low-frequency signal transmitter is turned to the left, the corresponding AM indicator lamp is turned on, the AM amplitude-adjusting potentiometer for adjusting the low-frequency signal transmitter can change the envelope amplitude, and the amplitude-adjusting potentiometer for adjusting the low-frequency signal transmitter can change the amplitude of the envelope signal.
The high-frequency amplifier amplifies the AM amplitude modulation signals sent by the first signal source module and sends the AM amplitude modulation signals to the corresponding first testing interface 2 and the corresponding down converter, and a student can know that the output signals of the high-frequency amplifier are about 400mV AM amplitude modulation signals through an oscilloscope, and the carrier frequency is 10.7 MHz. The amplification factor of the high-frequency amplifier can be set through a W1 potentiometer on the high-frequency amplifier, and attention is paid to the fact that the amplification factor is too large, the influence on the restoration of a post-stage signal is large, and the original signal cannot be restored.
The first oscillator outputs sinusoidal signals to the corresponding first test interface 2 and the corresponding down converter, and a student can know that the signals output by the first oscillator are sinusoidal signals with the amplitude of 500mV and 6.2MHz through an oscilloscope. Wherein the signal amplitude of the first oscillator is set by the first oscillator RF amplitude adjustment knob.
The down converter converts the frequency of the signal sent by the high-frequency amplifier according to the sine signal and outputs the signal to the corresponding first test interface 2 and the first band-pass filter, and a student can know that the output signal of the down converter is an amplitude-modulated signal with the amplitude of about 300mV and 4.5MHz through an oscilloscope;
the amplitude-modulated signals transmitted by the down converter are filtered by the first band-pass filter and then output to the corresponding first testing interface 2 and the demodulator, and a student can know that the output signals of the first band-pass filter are amplitude-modulated signals of about 4.5MHz and 200mV through an oscilloscope.
The demodulator demodulates the signal transmitted by the first band-pass filter and outputs the demodulated signal to the corresponding first test interface 2 and the corresponding first low-frequency amplifier, and a student can know that the output signal of the first band-pass filter is a sinusoidal signal with the amplitude of about 100mV and 1.8KHz through an oscilloscope.
The first low-frequency amplifier amplifies the signal transmitted by the demodulator and outputs the amplified signal to the corresponding first test interface 2 and the corresponding loudspeaker, and a student can know that the output signal of the first low-frequency amplifier is a sinusoidal signal with the frequency of 1.8KHz and the amplitude of about 3V through an oscilloscope.
The amplification factor of the first low-frequency amplifier can be set by adjusting a volume adjusting knob of the first low-frequency amplifier.
When fault diagnosis training is needed, a fault setting interface is entered through the first touch control screen, and a fault 1, a fault 2 and the like are selected.
For example: five fault touch keys are arranged in a fault setting interface of the first touch control screen, namely fault 1 to fault 5, each fault key corresponds to one first test interface 2 one by one, and the fault phenomenon and the reason of each fault touch key are described as a selection table:
in the actual operation process, when the fault 1 is clicked, the corresponding oscilloscope displays that the signal cannot be received, and students can know the fault reason by comparing the table, so that fault diagnosis training of the short-wave radio station receiving is realized.
When short-wave radio station signaling teaching is carried out, the second signal source module sends signals to the corresponding second test interface 7 and the second low-frequency amplifier at the same time, and a student can know that the signals are 1.8KHz and 400mV sinusoidal signals through an oscilloscope.
Wherein the signal amplitude is set by an amplitude adjustment potentiometer of the low frequency signal transmitter.
The second low-frequency amplifier amplifies the sinusoidal signal sent by the second signal source module and simultaneously outputs the amplified sinusoidal signal to the corresponding second test interface 7 and the low-frequency filter, and a student can know that the output signal of the second low-frequency amplifier is 1.8KHz and the signal amplitude is about 3V sinusoidal signals through an oscilloscope.
The amplification factor of the second low-frequency amplifier is set by adjusting a volume adjusting knob of the second low-frequency amplifier.
The low-frequency filter filters the sinusoidal signals sent by the second low-frequency amplifier and simultaneously outputs the sinusoidal signals to the corresponding second test interface 7 and the modulator, and a student can know that the output signals of the low-frequency filter are 1.8KHz sinusoidal signals and the signal amplitude is about 2.8V sinusoidal signals through an oscilloscope.
When the signal is not subjected to smooth distortion, the setting of the direct current offset knob of the low-frequency filter can be properly adjusted. 3
The modulator modulates the sinusoidal signal sent by the low-frequency filter and then simultaneously outputs the sinusoidal signal to the corresponding second test interface 7 and the mixer, and a student can know that the output signal of the modulator is 465K envelope signals through an oscilloscope, and the amplitude is about 300 mV.
The second oscillator outputs a sinusoidal signal to the corresponding second test interface 7 and the mixer, and a student can know that the signal output by the second oscillator is 4.965MHz and the signal amplitude is a 500mV sinusoidal signal through an oscilloscope. Wherein the signal amplitude of the second oscillator is set by the first oscillator RF amplitude adjustment knob.
The mixer mixes the sinusoidal signals sent by the second oscillator and the modulator and simultaneously outputs the mixed signals to the corresponding second test interface 7 and the second band-pass filter, and a student can know that the output signal of the mixer is 4.5M and the amplitude of the amplitude-modulated signal is about 200mV through an oscilloscope.
The mixing output contains multiple harmonic components, the signal part is clean, and the multiple harmonic components cause signal disorder.
The amplitude-modulated signals sent by the mixer are filtered by the second band-pass filter and then are simultaneously output to the corresponding second test interface 7 and the high-frequency power amplifier, and a student can know that the output signals of the second band-pass filter are 4.5M and the amplitude of the amplitude-modulated signals is about 200mV through an oscilloscope.
The high-frequency power amplifier filters the amplitude-modulated signal sent by the second band-pass filter and simultaneously outputs the amplitude-modulated signal to the corresponding second test interface 7 and the antenna, and a student can know that the output signal of the second band-pass filter is 4.5M and the amplitude of the amplitude-modulated signal is about 500mV through an oscilloscope.
And when fault diagnosis training is required, entering a fault setting interface through the second touch control screen, and selecting a fault 1, a fault 2 and the like.
For example: six fault touch keys are arranged in a fault setting interface of the second touch control screen, namely fault 1-fault 3, each fault key corresponds to one second test interface 7, and the fault phenomenon and reason description of each fault touch key are as selected from a list:
in the actual operation process, when the fault 1 is clicked, the corresponding oscilloscope displays that the signal cannot be received, and students can know the fault reason by comparing the upper table, so that fault diagnosis training of the short-wave radio station signal receiving is realized.
Claims (7)
1. A short-wave radio station teaching system capable of fault diagnosis training comprises a teaching device (1), wherein the teaching device (1) has a short-wave radio station function; the device is characterized by further comprising a fault module and a test module, wherein the teaching device (1) and the fault module are both in adaptive connection with the test module, the teaching device (1) sends a normal signal to the test module, and the fault module sends a simulated fault signal to the test module.
2. A short wave radio teaching system capable of fault diagnosis training as claimed in claim 1, characterized in that said teaching device (1) comprises a short wave radio reception teaching board (4) and a short wave radio transmission teaching board (6), both the short wave radio reception teaching board (4) and the short wave radio transmission teaching board (6) being PCBA boards; the fault module comprises a first fault control module and a second fault control module, the first fault control module is integrated on the short-wave radio station receiving teaching board (4), and the second fault control module is integrated on the short-wave radio station transmitting teaching board (6); the testing module comprises a first testing interface (2) and a second testing interface (7), wherein the first testing interface (2) is integrated on the short-wave radio receiving demonstrating board (4), and the second testing interface (7) is integrated on the short-wave radio transmitting demonstrating board (6).
3. The short wave radio teaching system capable of fault diagnosis training of claim 2, wherein a first signal source module, a high frequency amplifier, a down converter, a first oscillator, a first band pass filter, a demodulator and a first low frequency amplifier are integrated on the short wave radio reception teaching board (4); the first signal source module, the high-frequency amplifier, the down converter, the first oscillator, the first band-pass filter, the demodulator and the first low-frequency amplifier are all connected with one first test interface (2), and the first fault control module is in adaptive connection with all the first test interfaces (2); the first signal source module is connected with the high-frequency amplifier, the high-frequency amplifier and the first oscillator are connected with the down converter through the signal transmitting line (3), the down converter is connected with the first band-pass filter through the signal transmitting line (3), the first band-pass filter is connected with the demodulator through the signal transmitting line (3), and the demodulator is connected with the first low-frequency amplifier through the signal transmitting line (3).
4. The short wave radio teaching system capable of fault diagnosis training of claim 2 wherein the short wave radio transmitter teaching board comprises a second signal source module, a second low frequency amplifier, a low frequency filter, a modulator, a mixer, a second band pass filter, a high frequency power amplifier and a second oscillator; the second signal source module, the second low-frequency amplifier, the low-frequency filter, the modulator, the mixer, the second band-pass filter, the high-frequency power amplifier and the second oscillator are all connected with one second test interface (7); the second fault control module is in adaptive connection with all the second test interfaces (7); the second low-frequency amplifier is connected with the low-frequency filter through a signal transmitting line (3), the low-frequency filter is connected with the modulator through the signal transmitting line (3), the modulator and the second oscillator are connected with the frequency mixer through the signal transmitting line (3), the frequency mixer is connected with the second band-pass filter through the signal transmitting line (3), the second band-pass filter is connected with the high-frequency power amplifier through the signal transmitting line (3), and the high-frequency power amplifier is connected with the transmitting antenna.
5. A short wave radio teaching system capable of fault diagnosis training according to claim 3 or 4, characterized in that signal flow demonstration lamps (5) are uniformly distributed on the signal transmission line (3).
6. The short wave radio teaching system capable of fault diagnosis training of claim 3 wherein the first fault control module is a first touch control screen.
7. The short wave radio teaching system capable of fault diagnosis training of claim 4 wherein the second fault control module is a second touch control screen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110634307.7A CN113313991A (en) | 2021-06-07 | 2021-06-07 | Short-wave radio station teaching system capable of conducting fault diagnosis training |
| CN2021106343077 | 2021-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114783238A true CN114783238A (en) | 2022-07-22 |
| CN114783238B CN114783238B (en) | 2024-05-28 |
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| CN113313991A (en) | 2021-08-27 |
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