CN113608485A - Magnetic suspension real-time signal monitoring system and method based on Ethernet and virtual instrument - Google Patents

Magnetic suspension real-time signal monitoring system and method based on Ethernet and virtual instrument Download PDF

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Publication number
CN113608485A
CN113608485A CN202110934938.0A CN202110934938A CN113608485A CN 113608485 A CN113608485 A CN 113608485A CN 202110934938 A CN202110934938 A CN 202110934938A CN 113608485 A CN113608485 A CN 113608485A
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China
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magnetic suspension
data
controller
module
client
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纪历
陈美豪
唐仁芬
马雪晴
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Zhejiang Zhongyuan Maglev Technology Co ltd
Hangzhou Dianzi University
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Zhejiang Zhongyuan Maglev Technology Co ltd
Hangzhou Dianzi University
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Priority to CN202110934938.0A priority Critical patent/CN113608485A/en
Publication of CN113608485A publication Critical patent/CN113608485A/en
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423Input/output
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/20Pc systems
    • G05B2219/24Pc safety
    • G05B2219/24215Scada supervisory control and data acquisition

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The invention belongs to the technical field of magnetic suspension control systems, and discloses a magnetic suspension real-time signal monitoring system and a method based on Ethernet and a virtual instrument, wherein the system comprises a displacement sensor, an AD module, an Ethernet communication module and a client program; the invention utilizes the sampling system of the magnetic suspension control system, cooperates with the W5300 module and the LabView virtual instrument software, and monitors the vibration signals and the control current signals of the magnetic suspension rotor with five degrees of freedom in real time without any external testing instrument, thereby saving expensive equipment such as an oscilloscope, a data acquisition card and the like, reducing the development cost, and simultaneously avoiding the interference caused by the remote transmission of analog signals. The real-time performance of monitoring the magnetic suspension system signals is enhanced, and meanwhile, various data processing functions are provided, so that the analysis process is more efficient.

Description

Magnetic suspension real-time signal monitoring system and method based on Ethernet and virtual instrument
Technical Field
The invention belongs to the technical field of magnetic suspension control systems, and particularly relates to a magnetic suspension real-time signal monitoring system and method based on Ethernet and a virtual instrument.
Background
The magnetic suspension high-speed motor is widely applied to the fields of blowers, compressors, expansion generators and the like due to the characteristics of high speed, high efficiency, no friction and the like. During the debugging process of the magnetic suspension high-speed motor, the vibration signal and the control current signal of the rotor need to be monitored in real time to adjust the control parameters. Because of the high frequency of the signals, they are typically monitored using a multi-channel oscilloscope or a data acquisition card.
The principle is that data signals sampled inside a controller are converted into analog quantity, and then the analog quantity is displayed through an oscilloscope or uploaded to a PC (personal computer) through a data acquisition card for displaying. The method wastes system resources of the controller, and each magnetic levitation device needs an oscilloscope, so that the cost is high and the debugging efficiency is low.
The other method is that the controller stores the sampled data in the memory and then uploads the data to the PC end in a serial communication manner, which has the disadvantages of poor real-time performance, low transmission efficiency and difficulty in achieving the purpose of real-time monitoring.
Disclosure of Invention
The invention aims to provide a magnetic suspension real-time signal monitoring system and method based on Ethernet and a virtual instrument, and aims to solve the problems that the existing equipment for monitoring a vibration signal and a control current signal of a rotor is high in cost or poor in real-time performance.
In order to solve the technical problems, the specific technical scheme of the magnetic suspension real-time signal monitoring system and method based on the Ethernet and the virtual instrument is as follows:
a magnetic suspension real-time signal monitoring system based on Ethernet and virtual instruments comprises a controller, a PWM modulator, a power amplifier, a magnetic suspension coil, a magnetic suspension rotor, a displacement sensor, an AD module, an Ethernet communication module and a client program; one end of the controller is respectively connected with a PWM (pulse-width modulation) modulator and an Ethernet communication module, the Ethernet communication module is connected with a client, the PWM modulator is connected with a power amplifier, the power amplifier is connected with a magnetic suspension coil, the magnetic suspension coil is connected with a magnetic suspension rotor, the magnetic suspension rotor is connected with a displacement sensor, the displacement sensor is connected with an AD (analog-to-digital) module, and the AD module is connected with the other end of the controller;
the controller is used for acquiring vibration signals and control current signal data of five degrees of freedom of the magnetic suspension rotor and sending a command to write the acquired data (sampling data) into the Ethernet communication module; and the vibration signals and the control current signals of the magnetic suspension rotor with five degrees of freedom can be adjusted.
The PWM modulator is used for converting data collected by the controller into pulse signals;
the power amplifier is used for amplifying the pulse signal;
the magnetic suspension coil is used for converting the output control current into control force for the magnetic suspension rotor;
the displacement sensor is used for acquiring a displacement signal of the magnetic suspension rotor;
the AD module is used for converting the signal of the displacement sensor into digital quantity and returning the digital quantity to the controller;
the Ethernet communication module is used for communication between the controller and the client;
and the client is used for receiving vibration signals and control current signal data of the magnetic suspension rotor with five degrees of freedom, which are sent by the controller, and performing waveform simulation display and related data analysis on the vibration signals and the control current signal data.
Furthermore, the controller writes the sampling data and the sending command into the ethernet communication module in the waiting time period of each data sampling control period, the controller continues to execute the program of the next sampling control period, and the ethernet communication module starts the sending process to send the signal to the client.
Further, the ethernet communication module adopts a W5300 module, the W5300 module is connected with the controller through a 16-bit data line, and a timer interrupt is set in a controller program and used for writing data sampled and returned by the AD module into the W5300 module at intervals of about 50us to execute a sending process; the W5300 module includes an Sn _ IR register and an Sn _ SSR register, which are respectively used for storing a connection signal of the client and a signal indicating whether the last transmission of the content is completed.
Further, the client program is developed based on a LabView platform, and can simultaneously perform a data receiving process and a data processing process; the Ethernet communication module adopts a Tcp transmission protocol, and a well-packaged Tcp communication control is arranged in LabView.
Furthermore, the client comprises a data processing module, wherein the data processing module comprises ten channels of signal waveform display, a low-pass filter, real-time rotating speed display, FFT, an axis track, monitoring result screen capture and video recording, time axis stretching, signal gain adjustment of each channel, display range adjustment and waveform peak value and average value calculation.
The invention also discloses a magnetic suspension real-time signal monitoring method based on the Ethernet and the virtual instrument, which comprises the following steps:
step 1: configuring network parameters, opening Tcp connection, establishing connection with an Ethernet communication module, and starting a receiving process;
step 2: the controller collects vibration signals and control current signal data of the magnetic suspension rotor with five degrees of freedom and sends a command to write the collected data into the Ethernet communication module;
and step 3: the Ethernet communication module transmits the sampled data to the client;
and 4, step 4: the controller adjusts the control force of the five degrees of freedom of the magnetic suspension rotor, thereby adjusting the parameters of the magnetic suspension rotor and storing the parameters in the register as signal data sent next time.
And 5: the controller judges whether to connect with the client and whether the last sent content is sent completely, if the client is not connected or the last sent content is not sent completely, the next data is not written, and if the client is connected or the last sent content is sent completely, the next data is written.
Step 6: and the client displays the magnetic suspension rotor signal data acquired by the controller.
Further, the step 5 judges whether to connect to the client and whether the last transmitted content is completely transmitted by reading the values of the Sn _ IR register and the Sn _ SSR register of the W5300 module.
Further, after the controller writes the transmission data and the transmission command into the W5300 module, the transmission process is autonomously executed by the W5300 module, and the controller continues to execute the control and sampling program without intervention of the controller to prepare for the next transmission.
Further, when receiving the data, the step 1 generates an analog waveform array through the sampling number and the sampling period of each channel set by the front panel, and synchronously inputs the waveform array into a data processing module of the client in a queue mode, and the data processing module performs display and visual data processing of waveforms of each channel.
Further, each of the sample data has 4 check bits.
The magnetic suspension real-time signal monitoring system and method based on the Ethernet and the virtual instrument have the following advantages that: the invention is matched with a W5300 chip and LabView virtual instrument software, and under the condition of not using any external test instrument, the vibration signals and the control current signals of five degrees of freedom of the magnetic suspension rotor are monitored in real time, so that expensive equipment such as an oscilloscope, a data acquisition card and the like is saved, the development cost is reduced, and meanwhile, the interference caused by remote transmission of analog signals is avoided. The real-time performance of signal monitoring of the magnetic suspension system is enhanced, meanwhile, various data processing functions are provided, the signal waveform is monitored in real time, and meanwhile, the functions of axle center track, FFT, rotating speed display, video storage and the like are provided, so that the analysis process is more efficient.
Drawings
FIG. 1 is a schematic structural diagram of a magnetic levitation real-time signal monitoring system based on Ethernet and a virtual instrument according to the present invention;
FIG. 2 is a flow chart of server-side programming of the present invention;
FIG. 3 is a flow chart of client programming of the present invention;
FIG. 4 is a client-side interactive interface of the present invention.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, a magnetic suspension real-time signal monitoring system and method based on ethernet and virtual instrument according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a magnetic suspension real-time signal monitoring system based on ethernet and virtual instruments includes a controller, a PWM modulator, a power amplifier, a magnetic suspension coil, a magnetic suspension rotor, a displacement sensor, an AD module, an ethernet communication module, and a client program. One end of the controller is respectively connected with the PWM modulator and the Ethernet communication module, the Ethernet communication module is connected with the client, the PWM modulator is connected with the power amplifier, the power amplifier is connected with the magnetic suspension coil, the magnetic suspension coil is connected with the magnetic suspension rotor, the magnetic suspension rotor is connected with the displacement sensor, the displacement sensor is connected with the AD module, and the AD module is connected with the other end of the controller.
The controller is used for acquiring vibration signals and control current signal data of the magnetic suspension rotor with five degrees of freedom and sending a command to write the acquired data (sampling data) into the Ethernet communication module; and the vibration signals and the control current signals of the magnetic suspension rotor with five degrees of freedom can be adjusted.
The PWM modulator is used for converting data collected by the controller into pulse signals;
the power amplifier is used for amplifying the pulse signal;
the magnetic suspension coil is used for converting the output control current into control force for the magnetic suspension rotor;
the displacement sensor is used for acquiring a displacement signal of the magnetic suspension rotor;
the AD module is used for converting the signal of the displacement sensor into digital quantity and returning the digital quantity to the controller;
the Ethernet communication module is used for communication between the controller and the client;
the client is used for receiving vibration signals and control current signal data of the magnetic suspension rotor with five degrees of freedom, which are sent by the controller, and performing waveform simulation display and related data analysis on the vibration signals and the control current signal data.
As shown in fig. 2, the controller writes the sampled data and the sending command into the ethernet communication module during the waiting time period of each data sampling control period, and the controller continues to execute the program of the next sampling control period, and at the same time, the ethernet communication module starts the sending process to send the signal to the client. The Ethernet communication module adopts a W5300 module, the W5300 module is connected with the controller through a 16-bit data line, and the read/write establishing time, the read/write duration, the read/write tracking time and the line switching period are compressed as much as possible on the premise of ensuring that data can be written correctly, so that the controller has sufficient time to write the data into the W5300 module while running the sampling program within about 50us, and the data writing speed is accelerated. The controller program is provided with a timer interrupt, and can write data sampled and returned by the AD module into the W5300 module at intervals of about 50us to execute a transmission process. The W5300 module includes an Sn _ IR register and an Sn _ SSR register, which are respectively used for storing a connection signal of the client and a signal indicating whether the last transmission of the content is completed. Whether the client is connected and whether the last sent content is sent can be judged by reading the values of the Sn _ IR register and the Sn _ SSR register of the W5300 module, and if the client is not connected or the last sent content is not sent, data is not written in this time; and if the connected client or the last sending content is finished, writing the next data. Therefore, the sending register of the Ethernet communication module is ensured not to overflow, and the real-time performance of data is ensured. After the controller writes the sending data and the sending command into the W5300 module, the sending process is autonomously executed by the W5300 module, the controller can continuously execute the control and sampling program without the intervention of the controller, and the controller is ready for next sending.
As shown in fig. 3, a client program is developed based on a LabView platform, and an automatic multithreading of the LabView can simultaneously perform a data receiving process and a data processing process, so that the real-time requirement of the client is ensured. The Ethernet communication module adopts a Tcp transmission protocol, a packaged Tcp communication control is arranged in LabView, and communication can be carried out by configuring network parameters before a program runs. And starting a receiving process after the connection with the server is successfully established, and generating an analog waveform array through the sampling number and the sampling period of each channel set by the front panel during receiving. And synchronously inputting the analog waveform array into a data processing module of the client in a queue mode, and displaying and visualizing data of waveforms of all channels by the data processing module.
As shown in fig. 4, the data processing module includes ten-channel signal waveform display, a low-pass filter, real-time rotation speed display, FFT, axis locus, monitoring result screen capture and video recording, time axis stretching, signal gain adjustment of each channel, display range adjustment, and calculation of waveform peak value and average value. The interface arrangement can help technicians to conveniently analyze the state of the magnetic suspension rotor.
A magnetic suspension real-time signal monitoring method based on Ethernet and virtual instrument includes the following steps:
step 1: configuring network parameters, opening Tcp connection, establishing connection with an Ethernet communication module, and starting a receiving process;
step 2: the controller collects vibration signals and control current signal data of five degrees of freedom of the magnetic suspension rotor and sends a command to write the collected data (sampling data) into the Ethernet communication module;
and step 3: the Ethernet communication module transmits the sampled data to the client;
and 4, step 4: the controller adjusts the control force of the five degrees of freedom of the magnetic suspension rotor, thereby adjusting the parameters of the magnetic suspension rotor and storing the parameters in the register as signal data sent next time.
And 5: the controller judges whether to connect with the client and whether the last sent content is sent completely, if the client is not connected or the last sent content is not sent completely, the next data is not written, and if the client is connected or the last sent content is sent completely, the next data is written.
Step 6: and the client displays the magnetic suspension rotor signal data acquired by the controller.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A magnetic suspension real-time signal monitoring system based on Ethernet and virtual instruments is characterized by comprising a controller, a PWM modulator, a power amplifier, a magnetic suspension coil, a magnetic suspension rotor, a displacement sensor, an AD module, an Ethernet communication module and a client program; one end of the controller is respectively connected with a PWM (pulse-width modulation) modulator and an Ethernet communication module, the Ethernet communication module is connected with a client, the PWM modulator is connected with a power amplifier, the power amplifier is connected with a magnetic suspension coil, the magnetic suspension coil is connected with a magnetic suspension rotor, the magnetic suspension rotor is connected with a displacement sensor, the displacement sensor is connected with an AD (analog-to-digital) module, and the AD module is connected with the other end of the controller;
the controller is used for acquiring vibration signals and control current signal data of five degrees of freedom of the magnetic suspension rotor and sending a command to write the acquired data (sampling data) into the Ethernet communication module; and the vibration signals and the control current signals of the magnetic suspension rotor with five degrees of freedom can be adjusted.
The PWM modulator is used for converting data collected by the controller into pulse signals;
the power amplifier is used for amplifying the pulse signal;
the magnetic suspension coil is used for converting the output control current into control force for the magnetic suspension rotor;
the displacement sensor is used for acquiring a displacement signal of the magnetic suspension rotor;
the AD module is used for converting the signal of the displacement sensor into digital quantity and returning the digital quantity to the controller;
the Ethernet communication module is used for communication between the controller and the client;
and the client is used for receiving vibration signals and control current signal data of the magnetic suspension rotor with five degrees of freedom, which are sent by the controller, and performing waveform simulation display and related data analysis on the vibration signals and the control current signal data.
2. The system according to claim 1, wherein the controller writes the sampled data and the transmission command into the ethernet communication module during the waiting period of each data sampling control cycle, and the controller continues to execute the program of the next sampling control cycle while the ethernet communication module starts the transmission process to transmit the signal to the client.
3. The system for monitoring magnetically levitated real-time signals based on the Ethernet and the virtual instrument as claimed in claim 2, wherein the Ethernet communication module adopts a W5300 module, the W5300 module is connected with the controller by adopting a 16-bit data line, and a timer interrupt is set in a program of the controller and is used for writing data sampled and returned by the AD module into the W5300 module at intervals of about 50us to execute a sending process; the W5300 module includes an Sn _ IR register and an Sn _ SSR register, which are respectively used for storing a connection signal of the client and a signal indicating whether the last transmission of the content is completed.
4. The magnetic suspension real-time signal monitoring system based on the Ethernet and the virtual instrument as claimed in claim 1, wherein the client program is developed based on a LabView platform and can simultaneously perform a data receiving process and a data processing process; the Ethernet communication module adopts a Tcp transmission protocol, and a well-packaged Tcp communication control is arranged in LabView.
5. The system of claim 1, wherein the client comprises a data processing module, and the data processing module comprises ten channels of signal waveform display, a low pass filter, a real-time rotation speed display, an FFT, an axis track, a screen capture and video recording of monitoring results, a time axis stretching, signal gain adjustment of each channel, display range adjustment, and waveform peak and mean calculation.
6. A method for signal monitoring by using the magnetic suspension real-time signal monitoring system based on ethernet and virtual instrument according to any one of claims 1-5, comprising the following steps:
step 1: configuring network parameters, opening Tcp connection, establishing connection with an Ethernet communication module, and starting a receiving process;
step 2: the controller collects vibration signals and control current signal data of the magnetic suspension rotor with five degrees of freedom and sends a command to write the collected data into the Ethernet communication module;
and step 3: the Ethernet communication module transmits the sampled data to the client;
and 4, step 4: the controller adjusts the control force of the five degrees of freedom of the magnetic suspension rotor, thereby adjusting the parameters of the magnetic suspension rotor and storing the parameters in the register as signal data sent next time.
And 5: the controller judges whether to connect with the client and whether the last sent content is sent completely, if the client is not connected or the last sent content is not sent completely, the next data is not written, and if the client is connected or the last sent content is sent completely, the next data is written.
Step 6: and the client displays the magnetic suspension rotor signal data acquired by the controller.
7. The magnetically levitated real-time signal monitoring method according to claim 6, wherein the step 5 judges whether to connect with the client and whether the last transmitted content is completely transmitted by reading the values of the Sn _ IR register and the Sn _ SSR register of the W5300 module.
8. The method for monitoring magnetically levitated real-time signals of claim 6, wherein after the controller writes the transmission data and the transmission command into the W5300 module, the transmission process is autonomously performed by the W5300 module, and the controller continues to execute the control and sampling procedures without intervention of the controller to prepare for the next transmission.
9. The magnetic suspension real-time signal monitoring method according to claim 6, wherein the analog waveform array is generated by the sampling number and sampling period of each channel set by the front panel during the receiving in step 1, the analog waveform array is synchronously input to the data processing module of the client in a queue manner, and the data processing module performs the display and visualization data processing of the waveforms of each channel.
10. The method for monitoring a magnetically levitated real-time signal of claim 1, wherein each of the sampled data has 4 parity bits.
CN202110934938.0A 2021-08-16 2021-08-16 Magnetic suspension real-time signal monitoring system and method based on Ethernet and virtual instrument Pending CN113608485A (en)

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