CN113359550A - FSK data monitoring equipment based on FPGA - Google Patents

Abstract

The invention relates to the technical field of FSK data monitoring, in particular to FSK data monitoring equipment based on an FPGA; the optical coupler comprises a plurality of acquisition modules, a control optical coupler isolation module, a control magnetic coupler isolation module and a main control chip, wherein the acquisition modules are connected with a serial port control end of the main control chip through the control optical coupler isolation module and the control magnetic coupler isolation module, the main control chip is further connected with an Ethernet, an LCD, a key, a USB port and a TF port, the optical coupler takes optical signals as media to realize the coupling and transmission of electric signals, the input and the output are electrically and completely isolated, and the optical coupler has the characteristic of strong anti-interference performance.

Description

FSK data monitoring equipment based on FPGA

Technical Field

The invention relates to the technical field of FSK data monitoring, in particular to FSK data monitoring equipment based on an FPGA.

Background

FSK (Frequency-shift keying) is a modulation scheme used earlier in information transmission. The method is widely applied to data transmission of traffic systems such as subways and the like. The existing monitoring equipment generally directly reads the data content in transmission for analysis, so as to distinguish whether the FSK data transmission is normal. The disadvantages are that: 1, the data in transmission needs to be modulated and demodulated, and the efficiency is low; 2, because the original transmission network or line is lapped, the current fluctuation of the monitoring equipment is likely to interfere with the FSK data transmission in real time.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an FSK data monitoring device.

The technical scheme of the invention is as follows:

FSK data monitoring equipment based on FPGA, its characterized in that: the optical coupler comprises a plurality of acquisition modules, a control optical coupler isolation module, a control magnetic coupler isolation module and a main control chip, wherein the acquisition modules are connected with a serial port control end of the main control chip through the control optical coupler isolation module and the control magnetic coupler isolation module, the main control chip is further connected with an Ethernet, an LCD, a key, a USB port and a TF port, the optical coupler takes optical signals as media to realize the coupling and transmission of electric signals, the input and the output are electrically and completely isolated, and the optical coupler has the characteristic of strong anti-interference performance.

Furthermore, the FSK data monitoring equipment based on the FPGA also comprises a converter for converting alternating current 220 volts into direct current 5 volts, wherein the converter is used for supplying power to the main control chip, and the converter for converting the alternating current 220 volts into the direct current 12 volts is used for supplying power to the acquisition module.

Furthermore, the main control chip comprises a signal pre-stage processing module for receiving signals, an analog-to-digital converter, a data analysis and processing module and an MCU chip;

the data analysis and processing module comprises a gain control module, a variable frequency division module, a waveform data storage control module, a waveform display control module, a frequency measurement module, a keyboard scanning module and a display driving module;

the analog oscillography flow of the main control chip is as follows:

the acquisition module acquires analog signals of the FSK equipment (namely, the voltage and the frequency of a communication line are detected by accessing a CTF distribution board), the analog signals are led into the signal pre-stage processing module, the analog signals are converted into digital signals which can be identified by a computer through an analog-to-digital converter, the digital signals are led into the waveform data storage control module, the waveform data storage control module leads the calculated data into the waveform display control module through RAMA or RAMB, and then waveform data are restored in the analog oscilloscope through row scanning and column scanning;

the signal pre-processing module is used for guiding the analog signals into the frequency measuring module in two paths, the analog signals can be displayed in a 128 x 64 dot matrix mode through a display driver, a decision maker is connected with the keyboard scanning module through a keyboard, the keyboard scanning module controls the MCU chip and further controls the waveform data storage control module through the gain control module and the variable frequency dividing module.

Further, the analog-to-digital converter adopts AD 9220.

The invention has the beneficial effects that: the voltage and the frequency of a communication line are detected through a virtual oscilloscope detection mechanism, namely, a CTF distribution board is accessed to detect the voltage and the frequency of the communication line, an ADC + MCU + FPGA is used for calculating and restoring a continuous oscillogram, the signal quality is evaluated through the voltage peak value and the frequency to ensure the safety of a control signal, the condition that the fault of detection equipment affects the normal of signal equipment is avoided, and the signal is firstly isolated by a voltage transformer PT. The locomotive signal is filtered through a filter, then the FSK signal is detected and processed through a DSP single chip device. The virtual oscilloscope utilizes high-performance modular hardware and combines efficient and flexible software to complete various testing, measuring and automation applications.

Drawings

FIG. 1 is a schematic diagram of the principles of the present invention;

fig. 2 is a schematic diagram of the control and processing principle of the main control chip.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1 and 2, the FSK data monitoring apparatus is characterized in that: the optical coupler comprises a plurality of acquisition modules, a control optical coupler isolation module, a control magnetic coupler isolation module and a main control chip, wherein the acquisition modules are connected with a serial port control end of the main control chip through the control optical coupler isolation module and the control magnetic coupler isolation module, the main control chip is further connected with an Ethernet, an LCD, a key, a USB port and a TF port, the optical coupler takes optical signals as media to realize the coupling and transmission of electric signals, the input and the output are electrically and completely isolated, and the optical coupler has the characteristic of strong anti-interference performance.

The FSK data monitoring equipment further comprises a converter for converting alternating current 220 volts into direct current 5 volts, wherein the converter is used for supplying power to the main control chip, and the converter for converting alternating current 220 volts into direct current 12 volts is used for supplying power to the acquisition module.

The main control chip comprises a signal pre-processing module for receiving signals, an analog-to-digital converter, a data analysis and processing module and an MCU chip;

the data analysis and processing module comprises a gain control module, a variable frequency division module, a waveform data storage control module, a waveform display control module, a frequency measurement module, a keyboard scanning module and a display driving module;

the analog oscillography flow of the main control chip is as follows:

the acquisition module acquires analog signals of the FSK equipment (namely, the voltage and the frequency of a communication line are detected by accessing a CTF distribution board), the analog signals are led into the signal pre-stage processing module, the analog signals are converted into digital signals which can be identified by a computer through an analog-to-digital converter, the digital signals are led into the waveform data storage control module, the waveform data storage control module leads the calculated data into the waveform display control module through RAMA or RAMB, and then waveform data are restored in the analog oscilloscope through row scanning and column scanning;

the signal pre-processing module is used for guiding the analog signals into the frequency measurement module in two paths, the analog signals can be displayed in a 128 x 64 dot matrix mode through a display driver, a decision maker is connected with the keyboard scanning module through a keyboard, the keyboard scanning module controls the MCU chip and further controls the waveform data storage control module through the gain control module and the variable frequency division module.

The analog-to-digital converter adopts AD 9220.

The FSK signal collector utilizes high-performance modularized hardware and combines efficient and flexible software to complete various testing, measuring and automation applications. The device mainly comprises three parts, namely signal acquisition and control, data analysis and processing and measurement result display.

The signal acquisition and control is a hardware platform consisting of a computer and instrument hardware, and realizes the acquisition, measurement, conversion and control of signals;

the data analysis and processing are shown in that the FSK signal collector fully utilizes the storage and operation functions of a computer and realizes the analysis and processing of input data signals through software;

the measurement result of the FSK signal collector is displayed by utilizing the resources of a computer, such as a display, a memory and the like, and the measurement result is expressed and output in various modes, and data can also be transmitted and utilized by utilizing the computer.

The FSK signal collector is mainly different from a traditional oscilloscope in a result display part. According to the project, sampling and analysis of FSK waveforms can be achieved through the single chip microcomputer, the high-speed ADC chip and the FPGA, and then the FSK waveforms are uploaded to a cloud platform. A section of sample can also be sampled and uploaded to the cloud end, and the curve can be reproduced to serve as an original record.

The components and related parameters adopted in the present embodiment:

description of the components

a) The system main control adopts an MIPS framework network processor, an embedded operating system and a 4-inch full-color liquid crystal screen

b) Equipment interface: button, 4 cun LCD screen, AC input, 32 way BNC input terminal, WIFI antenna, RJ45

c) The device can simultaneously detect 32 FSK signals

d) Each channel outputs frequency, Vpp, Vrsm and several sections of periodic waveform data at fixed time, and the 32-channel polling period is less than 1S.

e) The liquid crystal display displays 32 paths of local real-time acquired data, one path of local real-time acquired data can be selected to check the waveform, and the number of the waveforms is more than 6

f) Support MODBUSTCP protocol

g) Firmware online upgrade, local area network BS architecture background management, WIFI (wireless fidelity) supporting routing and AP (access point) modes

h)2U rack type metal chassis for high temperature active heat dissipation

Second, electrical parameters

a) 100-power 250V alternating current input and 40W power consumption of the whole machine

b)10M/100M self-adaptive network card

c) Supporting dual antenna 150MWIFI

d)17 way complete isolation power supply system

e) FSK acquisition parameters

The foregoing embodiments and description have been presented only to illustrate the principles and preferred embodiments of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as hereinafter claimed.

Claims (4)

1. FSK data monitoring equipment based on FPGA, its characterized in that: the system comprises a plurality of acquisition modules, a control optical coupling isolation module, a control magnetic coupling isolation module and a main control chip, wherein the acquisition modules are connected with a serial port control end of the main control chip through the control optical coupling isolation module and the control magnetic coupling isolation module, and the main control chip is further connected with an Ethernet, an LCD, a key, a USB port and a TF port.

2. The FSK data monitoring device based on FPGA of claim 1, wherein: the FSK data monitoring equipment further comprises a converter for converting alternating current 220 volts into direct current 5 volts, wherein the converter is used for supplying power to the main control chip, and the converter for converting alternating current 220 volts into direct current 12 volts is used for supplying power to the acquisition module.

3. The FSK data monitoring device based on FPGA of claim 1, wherein: the main control chip comprises a signal pre-processing module for receiving signals, an analog-to-digital converter, a data analysis and processing module and an MCU chip;

the data analysis and processing module comprises a gain control module, a variable frequency division module, a waveform data storage control module, a waveform display control module, a frequency measurement module, a keyboard scanning module and a display driving module;

the analog oscillography flow of the main control chip is as follows:

the acquisition module acquires analog signals of the FSK equipment, the analog signals are led into the signal pre-stage processing module, the analog signals are converted into digital signals which can be identified by a computer through the analog-to-digital converter, the digital signals are led into the waveform data storage control module, the waveform data storage control module leads the calculated data into the waveform display control module through RAMA or RAMB, and then waveform data are restored in the analog oscilloscope through row scanning and column scanning;

the signal pre-processing module is used for guiding the analog signals into the frequency measuring module in two paths, the analog signals can be displayed in a 128 x 64 dot matrix mode through a display driver, a decision maker is connected with the keyboard scanning module through a keyboard, the keyboard scanning module controls the MCU chip and further controls the waveform data storage control module through the gain control module and the variable frequency dividing module.

4. The FSK data monitoring device based on FPGA of claim 1, wherein: the analog-to-digital converter adopts AD 9220.

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