CN212624552U - Beidou navigation receiving end teaching model - Google Patents
Beidou navigation receiving end teaching model Download PDFInfo
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- CN212624552U CN212624552U CN202021711997.9U CN202021711997U CN212624552U CN 212624552 U CN212624552 U CN 212624552U CN 202021711997 U CN202021711997 U CN 202021711997U CN 212624552 U CN212624552 U CN 212624552U
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Abstract
The utility model discloses a Beidou navigation receiving end teaching model, which comprises a signal transceiver 1, a signal transceiver 2, a low noise amplifier, a frequency mixer, a filter, an AD converter, a baseband signal processing unit, a positioning data resolving unit, a DA converter, a power amplifier, a signal/data display screen and a teaching demonstration computer which are all in signal connection with a master control unit; compared with the prior art, the utility model discloses refine the inner structure of big dipper navigation receiving terminal, adopt discrete component to remove to replace current integrated component to show working process and theory of operation directly perceived, solved "black box" teaching state of current navigation teaching, come out the process development of big dipper navigation receiving terminal, visual show in the teaching, provide a more directly perceived, more ideal learning platform for the student.
Description
Technical Field
The utility model belongs to the technical field of the navigation teaching, in particular to big dipper navigation receiving terminal teaching mode.
Background
The Beidou navigation receiving end is an important component of a Beidou satellite navigation system and is also a key link for popularizing the Beidou navigation system, the current Beidou navigation receiving end has higher and higher integration level, signal processing and most functions are integrated in a few chips, technically, the Beidou navigation receiving end has more benefits such as cost reduction, signal interference reduction, volume reduction, development difficulty reduction and the like, but the Beidou navigation receiving end has some problems as teaching work of colleges and universities on the Beidou navigation receiving end, for example, a front-end radio frequency signal part and internal signal processing of each level are integrated in a radio frequency chip, so that a student cannot have visual understanding on the working principle and the processing process of radio frequency signal processing, only one chip can be seen, and the internal working principle, working flow and signal change can only be explained by the theory of a teacher, the students are difficult to understand and have poor teaching effect. In order to overcome the defects of the prior art in teaching, a set of Beidou navigation receiving end teaching model is urgently needed, and a more intuitive and ideal learning platform is provided for students.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a technical scheme:
as shown in FIGS. 1-2, a Beidou navigation receiver teaching model comprises a signal transceiver 1, a signal transceiver 2, a low noise amplifier, a down-conversion mixer, a filter, an AD converter, a baseband signal processing unit, a positioning data resolving unit, a DA converter, an up-conversion mixer, a power amplifier, a signal/data display screen and a teaching demonstration computer, all of which are in signal connection with a master control unit, the teaching demonstration computer is further in signal connection with the signal transceiver 1, the signal transceiver 2 is further in signal connection with the power amplifier and the low-noise amplifier, the down-conversion mixer is further in signal connection with the low-noise amplifier and the filter, the AD converter is further in signal connection with the filter and the baseband signal processing unit, the baseband signal processing unit is further in signal connection with the positioning data resolving unit and the DA converter, and the DA converter is further in signal connection with the power amplifier;
the signal transceiver 1 is used for receiving or sending signals and performing wireless signal transmission with the signal transceiver 2;
the signal transceiver 2 is used for receiving or sending signals and performing wireless signal transmission with the signal transceiver 1;
the master control unit is used for reading the signals or data of each part in signal connection with the master control unit, outputting the signals or data to the signal/data display screen for real-time display, controlling the transmission sequence of the signals, simulating the actual working process of signal receiving and transmitting, and receiving the control instructions and data of the teaching demonstration computer.
The low-noise amplifier is used for amplifying the signal with smaller distortion;
the down-conversion mixer is used for performing down-conversion processing on the signal;
the filter is used for filtering the signals and removing clutter interference;
the AD converter is used for converting an analog signal into a digital signal;
the baseband signal processing unit is configured to acquire positioning data, such as pseudo-range observation data, carrier phase, doppler observation data, and the like, after acquiring and tracking a signal;
the positioning data resolving unit is used for resolving position information of a user;
the DA converter is used for converting the digital signal into an analog signal;
the up-conversion mixer is used for performing up-conversion processing on the signal;
the power amplifier is used for increasing the output power of the signal so as to enable the signal to be transmitted farther;
the signal/data display screen is used for displaying waveforms and data information of all parts of the Beidou receiving end in the working process;
the teaching demonstration computer is used for controlling the whole teaching model equipment and controlling the signal transceiver 1 so as to simulate signal communication between an external signal and a Beidou navigation receiving end;
description of the drawings: because the power of the Beidou satellite signal received from the receiving antenna is very weak and various noises are mixed, a low-noise amplifier is required to process the signal; after an electromagnetic wave signal transmitted by a Beidou satellite is converted into a voltage or current signal through an antenna, the high-frequency signal still cannot be processed, so that the satellite signal needs to be subjected to down-conversion and filtering through a mixer and a filter to obtain a medium-low frequency signal with a high carrier-to-noise ratio, and then the medium-low frequency signal is converted into a digital intermediate-frequency signal through AD (analog-to-digital) conversion, so that the medium-low frequency signal can be further received by a rear-stage baseband signal processing unit. In the front stage circuit of the transmitter, the radio frequency signal generated by the modulation oscillating circuit has low power, and needs to pass through a series of amplifying-buffer stage, intermediate amplifying stage and final power amplifying stage to obtain enough radio frequency power before being fed to the antenna for radiation.
Further, signal transceiver 1, signal transceiver 2, low noise amplifier, down conversion mixer, wave filter, AD converter, baseband signal processing unit, the unit is solved to the locating data, the DA converter, go up on frequency conversion mixer and power amplifier, all be connected with the pilot lamp for instruct the operating condition of coupling part, can know the waveform or the data that signal/data display screen real-time display belongs to navigation receiving terminal which part this moment through the pilot lamp, and can observe the transmission process at each part during signal transceiver.
Further, baseband signal processing unit and locating data solve the unit, can adopt discrete component, perhaps use the integrated chip of having installed in the current big dipper navigation receiver end product, only need read baseband signal processing unit and locating data respectively and solve the processing back signal of unit to show respectively through signal/data display screen can.
The working principle is as follows: the utility model discloses a theory of operation simulates the actual transmission order of the signal reception and the signalling of big dipper navigation receiving terminal in each part in inside on the whole and goes on, and each discrete component of adoption all is current ripe product, and total control unit only gathers each part to waveform or data after signal processing to through signal/data display screen real-time output display, the theory of operation and the signal of big dipper navigation receiving terminal in its inside flow have been restored completely, make teaching work visual, the platformization; the working process of simulating the Beidou navigation receiving end is specifically finished as follows:
according to the working process of receiving signals at a Beidou receiving end, the sequence of signal transmission is that a teaching demonstration computer wirelessly sends a set signal to a signal transceiver 2 through the signal transceiver 1, the signal received by the signal transceiver 2 sequentially passes through a low-noise amplifier, a down-conversion mixer and a filter, the signal is amplified, down-converted and filtered to obtain a medium-low frequency signal, then the medium-low frequency signal is subjected to analog-to-digital conversion through an AD converter, and a digital signal is processed through a baseband signal processing unit and a positioning resolving unit to finally resolve specific positioning information;
according to the working process of sending signals of a Beidou receiving end, the sequence of signal transmission is that a teaching demonstration computer sends set positioning data to a master control unit, the master control unit sends the signals to a positioning data processing unit, the signals pass through a baseband signal processing unit, middle and low frequency digital signals are output, the signals are converted into analog signals through a DA converter, the analog signals are subjected to upper frequency and power amplification through an up-conversion mixer and a power amplifier and then sent to a signal transceiver 2 to be wirelessly transmitted, and at the moment, the signal transceiver 1 can receive the signals;
during the working process of receiving and sending signals of the Beidou receiving end, all parts acquire the processed waveforms or data through the master control unit and output and display the processed waveforms or data in real time through the signal/data display screen, the indicating lamps of all parts show the working states of all parts through different colors and twinkles, for example, the working states of all parts do not work or the states of the processed signals are shown, and the indicating lamps can know which part of the processed waveforms or data is displayed on the signal/data display screen in real time.
The utility model discloses a discrete component removes to replace current integrated component, for example: the device comprises a signal transceiver 1, a signal transceiver 2, a low-noise amplifier, a frequency mixer, a filter, an AD converter, a baseband signal processing unit, a positioning data resolving unit, a DA converter and a power amplifier, wherein the discrete components are in signal connection with a master control unit, can observe data in real time and display the data on a signal/data display screen, so that teachers and students can have detailed and visual understanding of the working principle and the data processing process of a Beidou receiving end; therefore, each signal/data processing part can be independently controlled, signals before and after processing can be read at any time to be displayed, the whole working process of the Beidou navigation receiving end can be demonstrated, the Beidou navigation receiving end can also be suspended to any one step, the state of signal processing at the moment is independently checked, and the actual process of receiving and sending signals by the Beidou receiving end can be realized according to the hardware of the utility model, the whole process of receiving and sending signals is simulated on the basis of the hardware, and the working process and the working principle are visually expressed;
compared with the prior art, the utility model discloses with each component part that has independent function in the big dipper navigation receiving terminal, decompose and show alone, and show in real time the processing procedure to each module, make the student really know how to work between the hardware composition in the big dipper navigation receiving terminal and each part, thereby be familiar with whole workflow and theory of operation on the whole, can also be used for the maintenance teaching, if certain some partial functional circuit breaks down, what difference and change when output data is with normal, get up trouble and data correspondence, more vividly learn maintenance skill more accurately directly perceived, also can regard as a tool of training at ordinary times or examination.
The utility model discloses refine the inner structure of big dipper navigation receiving terminal, adopt discrete component to remove to replace current integrated component to show working process and theory of operation directly perceived, solved the "black box" teaching state of current navigation teaching, come out the process development of big dipper navigation receiving terminal, visual show in the teaching, provide a student a more directly perceived, more ideal learning platform.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing the layout of the parts in the embodiment of the present invention;
in the figure: the system comprises a signal transceiver 1, a signal transceiver 2, a low noise amplifier 3, a down-conversion mixer 4, a filter 5, an AD converter 6, a baseband signal processing unit 7, a positioning data resolving unit 8, a DA converter 9, an up-conversion mixer 10, a power amplifier 11, a signal/data display screen 12, a master control unit 13, a model placing platform 14 and an indicator light 15.
Detailed Description
A Beidou navigation receiving end teaching model comprises a signal transceiver 1, a signal transceiver 2, a low-noise amplifier, a down-conversion mixer, a filter, an AD converter, a baseband signal processing unit, a positioning data resolving unit, a DA converter, an up-conversion mixer, a power amplifier, a signal/data display screen and a teaching demonstration computer which are all in signal connection with a master control unit, wherein the teaching demonstration computer is also in signal connection with the signal transceiver 1, the signal transceiver 2 is also in signal connection with the power amplifier and the low-noise amplifier, the mixer is also in signal connection with the low-noise amplifier and the filter, the AD converter is also in signal connection with the filter and the baseband signal processing unit, the baseband signal processing unit is also in signal connection with the positioning data resolving unit and the DA converter, and the DA converter is also in signal connection with the power amplifier;
the signal transceiver 1 is used for receiving or sending signals and performing wireless signal transmission with the signal transceiver 2;
the signal transceiver 2 is used for receiving or sending signals and performing wireless signal transmission with the signal transceiver 1;
the master control unit is used for reading the signals or data of each part in signal connection with the master control unit, outputting the signals or data to the signal/data display screen for real-time display, controlling the transmission sequence of the signals, simulating the actual working process of signal receiving and transmitting, and receiving the control instructions and data of the teaching demonstration computer.
The low-noise amplifier is used for amplifying the signal with smaller distortion;
the down-conversion mixer is used for performing down-conversion processing on the signal;
the filter is used for filtering the signals and removing clutter interference;
the AD converter is used for converting an analog signal into a digital signal;
the baseband signal processing unit is configured to acquire positioning data, such as pseudo-range observation data, carrier phase, doppler observation data, and the like, after acquiring and tracking a signal;
the positioning data resolving unit is used for resolving position information of a user;
the DA converter is used for converting the digital signal into an analog signal;
the up-conversion mixer is used for performing up-conversion processing on the signal;
the power amplifier is used for increasing the output power of the signal so as to enable the signal to be transmitted farther;
the signal/data display screen is used for displaying waveforms and data information of all parts of the Beidou receiving end in the working process;
the teaching demonstration computer is used for controlling the whole teaching model equipment and controlling the signal transceiver 1 so as to simulate signal communication between an external signal and a Beidou navigation receiving end;
description of the drawings: because the power of the Beidou satellite signal received from the receiving antenna is very weak and various noises are mixed, a low-noise amplifier is required to process the signal; after an electromagnetic wave signal transmitted by a Beidou satellite is converted into a voltage or current signal through an antenna, the high-frequency signal still cannot be processed, so that the satellite signal needs to be subjected to down-conversion and filtering through a mixer and a filter to obtain a medium-low frequency signal with a high carrier-to-noise ratio, and then the medium-low frequency signal is converted into a digital intermediate-frequency signal through AD (analog-to-digital) conversion, so that the medium-low frequency signal can be further received by a rear-stage baseband signal processing unit. In the front stage circuit of the transmitter, the radio frequency signal generated by the modulation oscillating circuit has low power, and needs to pass through a series of amplifying-buffer stage, intermediate amplifying stage and final power amplifying stage to obtain enough radio frequency power before being fed to the antenna for radiation.
The signal transceiver 1, signal transceiver 2, low noise amplifier, down conversion mixer, wave filter, AD converter, baseband signal processing unit, the unit is solved to the locating data, the DA converter, on last conversion mixer and the power amplifier, all be connected with the pilot lamp for instruct the operating condition of coupling part, can know the wave form or the data that signal/data display screen real-time display belongs to navigation receiving terminal which part this moment through the pilot lamp, and can observe the transmission process at each part when signal transceiver.
The utility model discloses an it is used for the teaching, so to the precision of each part and the anti-interference performance requirement general, the lectotype requirement is wider, on the basis that satisfies basic function, the main hardware equipment and the parameter of reference, as shown in the following table.
Description of the drawings: the sensor model selection scheme in this embodiment is one of them of multiple scheme, does not restrict specific model, and other satisfy the utility model discloses the model selection scheme of functional requirement all can. The baseband signal processing unit and the positioning data resolving unit can adopt discrete components, or use an integrated chip installed in the existing Beidou navigation receiving end product, and only need to read the processed signals of the baseband signal processing unit and the positioning data resolving unit respectively, and the processed signals can be displayed through a signal/data display screen respectively.
The working principle is as follows: the utility model discloses a theory of operation simulates the actual transmission order of the signal reception and the signalling of big dipper navigation receiving terminal in each part in inside on the whole and goes on, and each discrete component of adoption all is current ripe product, and total control unit only gathers each part to waveform or data after signal processing to through signal/data display screen real-time output display, the theory of operation and the signal of big dipper navigation receiving terminal in its inside flow have been restored completely, make teaching work visual, the platformization; the working process of simulating the Beidou navigation receiving end is specifically finished as follows:
according to the working process of receiving signals at a Beidou receiving end, the sequence of signal transmission is that a teaching demonstration computer wirelessly sends a set signal to a signal transceiver 2 through the signal transceiver 1, the signal received by the signal transceiver 2 sequentially passes through a low-noise amplifier, a down-conversion mixer and a filter, the signal is amplified, down-converted and filtered to obtain a medium-low frequency signal, then the medium-low frequency signal is subjected to analog-to-digital conversion through an AD converter, and a digital signal is processed through a baseband signal processing unit and a positioning resolving unit to finally resolve specific positioning information;
according to the working process of sending signals of a Beidou receiving end, the sequence of signal transmission is that a teaching demonstration computer sends set positioning data to a master control unit, the master control unit sends the signals to a positioning data processing unit, the signals pass through a baseband signal processing unit, middle and low frequency digital signals are output, the signals are converted into analog signals through a DA converter, the analog signals are subjected to upper frequency and power amplification through an up-conversion mixer and a power amplifier and then sent to a signal transceiver 2 to be wirelessly transmitted, and at the moment, the signal transceiver 1 can receive the signals;
during the working process of receiving and sending signals of the Beidou receiving end, all parts acquire the processed waveforms or data through the master control unit and output and display the processed waveforms or data in real time through the signal/data display screen, the indicating lamps of all parts show the working states of all parts through different colors and twinkles, for example, the working states of all parts do not work or the states of the processed signals are shown, and the indicating lamps can know which part of the processed waveforms or data is displayed on the signal/data display screen in real time.
The utility model discloses a discrete component removes to replace current integrated component, for example: the device comprises a signal transceiver 1, a signal transceiver 2, a low-noise amplifier, a frequency mixer, a filter, an AD converter, a baseband signal processing unit, a positioning data resolving unit, a DA converter and a power amplifier, wherein the discrete components are in signal connection with a master control unit, can observe data in real time and display the data on a signal/data display screen, so that teachers and students can have detailed and visual understanding of the working principle and the data processing process of a Beidou receiving end; therefore, each signal/data processing part can be independently controlled, signals before and after processing can be read at any time to be displayed, the whole working process of the Beidou navigation receiving end can be demonstrated, the Beidou navigation receiving end can also be suspended to any one step, the state of signal processing at the moment is independently checked, and the actual process of receiving and sending signals by the Beidou receiving end can be realized according to the hardware of the utility model, the whole process of receiving and sending signals is simulated on the basis of the hardware, and the working process and the working principle are visually expressed;
compared with the prior art, the utility model discloses with each component part that has independent function in the big dipper navigation receiving terminal, decompose and show alone, and show in real time the processing procedure to each module, make the student really know how to work between the hardware composition in the big dipper navigation receiving terminal and each part, thereby be familiar with whole workflow and theory of operation on the whole, can also be used for the maintenance teaching, if certain some partial functional circuit breaks down, what difference and change when output data is with normal, get up trouble and data correspondence, more vividly learn maintenance skill more accurately directly perceived, also can regard as a tool of training at ordinary times or examination.
The utility model discloses refine the inner structure of big dipper navigation receiving terminal, adopt discrete component to remove to replace current integrated component to show working process and theory of operation directly perceived, solved the "black box" teaching state of current navigation teaching, come out the process development of big dipper navigation receiving terminal, visual show in the teaching, provide a student a more directly perceived, more ideal learning platform.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (3)
1. A Beidou navigation receiving end teaching model is characterized by comprising a signal transceiver 1, a signal transceiver 2, a low noise amplifier, a down-conversion frequency mixer, a filter, an AD converter, a baseband signal processing unit, a positioning data resolving unit, a DA converter, an up-conversion frequency mixer, a power amplifier, a signal/data display screen and a teaching demonstration computer which are all in signal connection with a master control unit, the teaching demonstration computer is further in signal connection with the signal transceiver 1, the signal transceiver 2 is further in signal connection with the power amplifier and the low-noise amplifier, the down-conversion mixer is further in signal connection with the low-noise amplifier and the filter, the AD converter is further in signal connection with the filter and the baseband signal processing unit, the baseband signal processing unit is further in signal connection with the positioning data resolving unit and the DA converter, and the DA converter is further in signal connection with the power amplifier;
the signal transceiver 1 is used for receiving or sending signals and performing wireless signal transmission with the signal transceiver 2;
the signal transceiver 2 is used for receiving or sending signals and performing wireless signal transmission with the signal transceiver 1;
the main control unit is used for reading signals or data of each part in signal connection with the main control unit, outputting the signals or data to the signal/data display screen for real-time display, controlling the transmission sequence of the signals, simulating the actual working process of signal receiving and sending, and receiving control instructions and data of the teaching demonstration computer;
the low-noise amplifier is used for amplifying a signal subjected to distortion;
the down-conversion mixer is used for performing down-conversion processing on the signal;
the filter is used for filtering the signals and removing clutter interference;
the AD converter is used for converting an analog signal into a digital signal;
the baseband signal processing unit is used for acquiring positioning data after capturing and tracking the signal;
the positioning data resolving unit is used for resolving position information of a user;
the DA converter is used for converting the digital signal into an analog signal;
the up-conversion mixer is used for performing up-conversion processing on the signal;
the power amplifier is used for increasing the output power of the signal so as to enable the signal to be transmitted farther;
the signal/data display screen is used for displaying waveforms and data information of all parts of the Beidou receiving end in the working process;
the teaching demonstration computer is used for controlling the whole teaching model equipment and controlling the signal transceiver 1 so as to simulate signal communication between an external signal and the Beidou navigation receiving end.
2. The Beidou navigation satellite system receiving end teaching model according to claim 1, wherein indicator lamps are connected to the signal transceiver 1, the signal transceiver 2, the low noise amplifier, the down conversion mixer, the filter, the AD converter, the baseband signal processing unit, the positioning data resolving unit, the DA converter, the up conversion mixer and the power amplifier, and are used for indicating the working state of the connecting part.
3. The Beidou navigation receiving end teaching model according to claim 1, wherein the baseband signal processing unit and the positioning data resolving unit can adopt discrete components or use an integrated chip installed in the existing Beidou navigation receiving end product, and are used for reading the processed signals of the baseband signal processing unit and the positioning data resolving unit and respectively displaying the signals through a signal/data display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021711997.9U CN212624552U (en) | 2020-08-17 | 2020-08-17 | Beidou navigation receiving end teaching model |
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| CN202021711997.9U CN212624552U (en) | 2020-08-17 | 2020-08-17 | Beidou navigation receiving end teaching model |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113593340A (en) * | 2021-08-02 | 2021-11-02 | 北京华云智联科技有限公司 | Beidou teaching interactive system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113593340A (en) * | 2021-08-02 | 2021-11-02 | 北京华云智联科技有限公司 | Beidou teaching interactive system |
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