CN108955867A - A kind of multichannel remote oscillation signal monitor and monitor system - Google Patents

Abstract

The invention discloses a kind of multichannel remote oscillation signal monitor and monitor systems, monitor system includes host computer and multichannel remote oscillation signal monitor, host computer includes that host computer prison shows GUI module, monitor includes slave computer, GPRS wireless transport module and power module, upper computer and lower computer is connected by GPRS wireless transport module, and power module provides electric energy for monitor；Slave computer includes single-chip microcontroller, data acquisition module and control display module, and data acquisition module and control display module are connect with single-chip microcontroller respectively, and single-chip microcontroller includes control unit, outside RTC, external crystal-controlled oscillation and EEPROM module；Data acquisition module includes multiple vibration signal sensors, signal condition amplifying circuit and multichannel ADC conversion module；Controlling display module includes TFTLCD touch screen module.The present invention can be achieved multichannel remote oscillation signal analysis prison and show function.

Description

A multi-channel remote vibration signal monitor and monitoring system

technical field

The invention belongs to the field of fault diagnosis of mechanical equipment, in particular to a multi-channel remote vibration signal monitor and a monitor system.

Background technique

Large-scale rotating mechanical structures, such as steam turbine generators, hydroelectric generators, and flue gas turbines, generally use sliding bearings to support the shaft, and the relative vibration of the shaft to the bearing is monitored through a vibration monitoring and protection system. The vibration monitoring and protection system includes two eddy current sensors, which are used to measure the vibration of the two channels respectively. However, since the two eddy current sensors can only measure the vibration signals of two positions of the mechanical structure, but the structure of the unit, the operating parameters and the anisotropy of the bearing oil film stiffness in the circumferential direction, etc., lead to the vibration signals in the two directions. There are usually certain differences in vibration, for example, the vibration in one direction is larger and the vibration in the other direction is smaller, which brings certain difficulties to the alarm and abnormal judgment of the vibration monitoring and protection system; and the monitoring information must be obtained through on-site real-time monitoring, and further It is transmitted to the remote terminal, which brings inconvenience to the actual monitoring work of the company and mechanical equipment.

Therefore, it is urgent to design a multi-channel remote vibration signal monitor that monitors the vibration signals of different positions of the large rotating mechanism at the same time, and realizes on-site real-time display of monitoring information and remote real-time online display and processing.

Contents of the invention

Purpose of the invention: one purpose is to provide a multi-channel remote vibration signal monitor and monitoring system, to solve the above-mentioned problems in the prior art and application, expand the function of the vibration signal monitor, and improve the vibration signal monitor to multiple Vibration signal monitoring at different positions of the mechanical structure, simple and accurate measurement, timely detection of faults in the mechanical structure and transmission of monitoring data to the host computer for data processing and display, to achieve remote online monitoring of vibration signals.

Technical solution: In order to realize the above-mentioned purpose of the invention, the following technical solution is adopted:

A multi-channel remote vibration signal monitor comprises a lower computer, a GPRS wireless transmission module and a power supply module, the lower computer includes a single-chip microcomputer, a data acquisition module, a control display module, and the data acquisition module and the control display module are respectively connected with the single-chip microcomputer Connection, MCU includes control unit, external RTC, external crystal oscillator and EEPROM module; data acquisition module includes multiple vibration signal sensors, signal conditioning amplifier circuit and multi-channel ADC conversion module; control display module includes TFTLCD touch screen module;

GPRS wireless transmission module comprises SIM900 module and SIM card connection module, and described SIM900 module is connected with single-chip microcomputer, establishes connection with the server on the Internet by GPRS network, and the data collected is sent to server by antenna; Described SIM card connection module and The SIM900 module is electrically connected and powered by the SIM900 module through a voltage conditioning circuit;

The power module includes a DC power drive module and a voltage amplification module. The output of the DC power drive module is connected to the input of the voltage amplification module. The output of the voltage amplification module is respectively connected to the power input of the control unit, the input of the TFTLCD touch screen and the power input of the SIM900 module.

Preferably, the data acquisition module adopts a plurality of vibration signal sensors, and is equipped with an on-chip DMA controller at the same time, which is used for multi-channel simultaneous measurement of radial vibration signals, axial vibration signals and shell vibration signals of the mechanical device, wherein the radial vibration The signal is measured simultaneously from vibration signals in both longitudinal and transverse directions.

In another embodiment, a multi-channel remote vibration signal monitoring system is provided, including a host computer and a multi-channel remote vibration signal monitor, wherein:

The upper computer includes the upper computer monitoring GUI module;

The multi-channel remote vibration signal monitor comprises a lower computer, a GPRS wireless transmission module and a power supply module, and the lower computer includes a single-chip microcomputer, a data acquisition module and a control display module, and the data collection module and the control display module are connected with the single-chip microcomputer respectively, and the single-chip microcomputer Contains control unit, external RTC, external crystal oscillator and EEPROM module; data acquisition module includes multiple vibration signal sensors, signal conditioning amplifier circuit and multi-channel ADC conversion module; control display module includes TFTLCD touch screen module;

GPRS wireless transmission module comprises SIM900 module and SIM card connection module, and described SIM900 module is connected with single-chip microcomputer, establishes connection with the server on the Internet by GPRS network, and the data collected is sent to server by antenna; Described SIM card connection module and The SIM900 module is electrically connected and powered by the SIM900 module through a voltage conditioning circuit;

The power module includes a DC power drive module and a voltage amplification module. The output of the DC power drive module is connected to the input of the voltage amplification module. The output of the voltage amplification module is respectively connected to the power input of the control unit, the input of the TFTLCD touch screen and the power input of the SIM900 module.

The upper computer and the lower computer are connected through a GPRS wireless transmission module, and the power supply module supplies power for the monitor.

Preferably, the monitoring GUI module of the host computer mainly includes a data receiving module, a data display module and a data storage module, and the data receiving module utilizes the TCPListen function in the LabView communication tool to listen to the connection request from the client, and waits at the designated port The GPRS wireless transmission module requests through the TCP connection. After the connection is established, use the TCP Read function to read the data transmitted by the terminal, and set the working mode of the TCP Read function to standard, that is, wait until all specified bytes are read or "timeout milliseconds" is used Finished, returns the currently read bytes, if the number of read bytes is less than the set fixed number of bytes, an error will be reported; the data display module converts the acquired data to display the data in tabular form On the visual interface of the front panel; the data storage module writes the data into the spreadsheet for off-line processing through the Write To Spreadsheet File function.

Preferably, the data acquisition module adopts a plurality of vibration signal sensors, and is equipped with an on-chip DMA controller at the same time, which is used for multi-channel simultaneous measurement of radial vibration signals, axial vibration signals and shell vibration signals of the mechanical device, wherein the radial vibration The signal is measured simultaneously from vibration signals in both longitudinal and transverse directions.

Preferably, the vibration signal sensor is a piezoelectric acceleration sensor.

Preferably, the voltage amplifying module is powered by a DC power drive module, and the amplifying circuits are respectively designed according to a plurality of PT1301 chips to provide working voltages for different modules respectively.

Preferably, the DC power drive module is composed of two 1.5v dry batteries, the voltage amplifying module converts the 3v voltage into 3.3v, 4v and 5v outputs, and the 3.3v output terminal of the voltage amplifying module is connected to the power input terminal of the control unit; The 5v output terminal of the amplifying module is connected to the input terminal of the TFTLCD touch screen; the 4v output terminal of the voltage amplifying module is connected to the power input terminal of the SIM900 module.

Preferably, the control unit adopts an ARM processing chip STM32F103RBT6.

Preferably, the signal conditioning amplifying circuit includes a voltage amplifying circuit composed of an OPA2336UA chip and a resistance-capacitance filtering circuit for amplifying and filtering analog signals; the multi-channel ADC conversion module is equipped with an AD7705 high-precision analog-to-digital conversion chip, Acquisition accuracy can reach 16 bits, SPI mode is used to communicate with the control unit, and DMA mode is used to realize multi-channel signal acquisition at the same time.

Beneficial effects: Compared with the prior art, the present invention adopts multi-channel monitoring of vibration signals at different positions of rotating mechanical equipment, the monitoring is more accurate and faster, and the mechanical failure information at different positions can be found in time; the TFTLCD touch screen module is introduced, which is more convenient to carry out Human-computer interaction, implement the control detection process and display monitoring information on site; introduce GPRS wireless transmission module and host computer monitoring GUI module, use SIM900 module and SIM card connection module to realize remote real-time display of vibration signals, and use LabView software to realize monitoring data The on-line display, analysis and processing of the upper computer makes the fault monitoring and diagnosis of large rotating mechanical equipment more convenient and quick; it helps to further improve the problem of mechanical fault monitoring and diagnosis, and has high social practical value.

Description of drawings

Fig. 1 is the connection schematic diagram of monitor circuit module of the present invention;

Fig. 2 is a schematic diagram of the signal transmission structure of the monitor of the present invention;

Fig. 3 is a schematic diagram of the installation position of the vibration signal sensor of the present invention.

Detailed ways

The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention implements a multi-channel remote vibration signal monitor, which can realize multi-channel monitoring of vibration signals of large-scale rotating mechanical equipment, TFTLCD touch screen control and display monitoring process and results, remote real-time host computer online display, analysis and processing of monitoring vibration signals, wherein STM32F103RBT6 is the main chip (that is, the control unit, the same below), which coordinates the orderly work of each module.

A multi-channel remote vibration signal monitor of the present invention includes a lower computer, a GPRS wireless transmission module and a power supply module, the lower computer includes a single-chip microcomputer, a data acquisition module, a control display module, and the data acquisition module and the control display module Respectively connected with single-chip microcomputer, single-chip microcomputer includes control unit, external RTC, external crystal oscillator and EEPROM module; data acquisition module includes multiple vibration signal sensors, signal conditioning amplifier circuit and multi-channel ADC conversion module; control display module includes TFTLCD touch screen module; GPRS wireless Transmission module comprises SIM900 module and SIM card connection module, and described SIM900 module is connected with single-chip microcomputer, establishes connection with the server on the Internet by GPRS network, and the data collected is sent to server by antenna; Described SIM card connection module and SIM900 module Electrically connected, powered by the SIM900 module through the voltage conditioning circuit; the power module includes a DC power drive module and a voltage amplification module, the output of the DC power drive module is connected to the input of the voltage amplification module, and the output of the voltage amplification module is connected to the control unit power input terminal and TFTLCD respectively. The touch screen input terminal is connected to the power input terminal of the SIM900 module.

Referring to Fig. 1, in one embodiment of the present invention, a kind of multi-channel remote vibration signal monitor comprises lower computer, GPRS wireless transmission module and power supply module, and lower computer comprises single-chip microcomputer, data acquisition module and control display module, data acquisition The module and the control display module are respectively connected with the single-chip microcomputer. The single-chip microcomputer includes a control unit, an external RTC, an external crystal oscillator and an EEPROM module; the data acquisition module includes multiple vibration signal sensors, a signal conditioning amplifier circuit and a multi-channel ADC conversion module; the control display module includes a TFTLCD Touch screen module; the control unit selects the STM32F103RBT6 chip with high performance and low power consumption, which is responsible for coordinating the overall operation of the monitoring instrument. The external RTC is responsible for providing the time scale for the control unit, the external crystal oscillator provides the 72MHz operating frequency for the control unit, and the EEPROM module is responsible for monitoring. display data cache.

The data acquisition module is responsible for converting the vibration signals monitored by the vibration signal sensors placed in various parts of the rotating machinery into digital signals and transmitting them to the control unit. The output of multiple vibration signal sensors is connected with the input of the signal conditioning amplifier circuit, and then connected with the control unit through the multi-channel ADC conversion module. The vibration signal sensor is mainly composed of a piezoelectric acceleration sensor. The piezoelectric acceleration sensor is the most common and practical type of vibration acceleration sensor on the market. It has a smaller volume, a higher cost performance, and a stronger Anti-interference characteristics, and the most practical and convenient measurement and calibration method, the piezoelectric acceleration sensor uses a contact measurement method, which can easily attach multiple sensors to the surface of rotating machinery and measure its vibration signals; the signal The conditioning amplifier circuit is mainly composed of a voltage amplifier circuit composed of an OPA2336UA chip and a resistance-capacity filter circuit, which is responsible for the amplification and filtering of analog signals; the multi-channel ADC conversion module is equipped with an AD7705 high-precision analog-to-digital conversion chip, and the acquisition accuracy can reach 16 bits , using the SPI method to communicate with the control unit, and using the DMA method to realize simultaneous acquisition of multi-channel signals.

The on-board control chip of the TFTLCD touch screen module is XPT2046. XPT2046 is a 4-wire touch screen controller, which contains a 12-bit resolution 125KHZ conversion rate and gradually approximates the A/D converter, which is connected to the 5v voltage output of the voltage amplification module. During the measurement process, the work of the monitoring instrument is controlled according to the monitoring input of the touch screen module, and different monitoring contents are displayed according to the specific monitoring process of the instrument.

The GPRS wireless transmission module includes a SIM900 module and a SIM card module. The GPRS wireless transmission module includes a SIM900 module, a SIM card connection module and a power supply circuit. Data transmission is carried out between the SIM900 module and the control unit through a serial port, and the voltage amplification module Provide 4v voltage, establish a connection with the server on the Internet through the GPRS network, and send the collected data to the server through the antenna; the SIM card connection module is electrically connected with the SIM900 module, and the SIM900 module provides 3v or 1.8v through the voltage conditioning circuit The voltage is automatically selected according to the SIM module provided by the communication company.

The power module includes a DC power drive module and a voltage amplification module composed of two 1.5v dry batteries. The voltage amplification module converts 3v voltage into 3.3v, 4v and 5v outputs. The 3.3v output terminal of the voltage amplification module is connected to the power input terminal of the control unit Connect to provide the standard working voltage of the chip; the 5v output terminal of the voltage amplification module is connected to the power input terminal of the TFTLCD touch screen for realizing human-computer interaction and real-time control of the measurement process; the 4v output terminal of the voltage amplification module is connected to the power input terminal of the SIM900 module . The voltage amplifying module fully reflects the low power consumption characteristics of the instrument as a whole. All modules are powered by the same voltage source, and the amplifying circuits are designed separately based on multiple PT1301 chips to provide working voltages for different modules.

Referring to Fig. 2, the multi-channel remote vibration signal monitoring system of the present invention includes a host computer and a multi-channel remote vibration signal monitor, the host computer includes a host computer monitoring GUI module, and the multi-channel remote vibration signal monitor includes a lower computer , GPRS wireless transmission module and power supply module, the lower computer includes single-chip microcomputer, data acquisition module and control display module; upper computer and lower computer can be connected through GPRS wireless transmission module, GPRS wireless transmission module is composed of SIM900 module and SIM card module, in order to realize Remote wireless transmission of data. Among them, the lower computer part can measure the vibration information of the mechanical equipment in the transverse direction, longitudinal direction, axial direction and shell through the vibration signal sensors placed in different positions of the large rotating mechanical equipment, and through the data acquisition and conversion processing of the multi-channel ADC conversion module, in the TFTLCD Under the control and display of the touch screen, the monitoring data information is transmitted to the PC (host computer) through the GPRS wireless transmission module, and the GUI interface is designed through LabView to perform real-time online analysis, processing and real-time display of the monitored data information. Among them, the host computer The monitoring GUI module can use the data processing tools such as spectrum conversion, digital filtering and fast Fourier transform in the LabView data analysis tool to process and analyze the data online and display the amplitude-frequency response signal and spectrum analysis diagram of the vibration signal.

The host computer monitoring GUI module mainly includes a data receiving module, a data display module and a data storage module. The data receiving module uses the TCPListen function in the LabView communication tool to listen to the connection request from the client, and waits for the GPRS module to connect through TCP at the designated port. Request, after the connection is established, use the TCP Read function to read the data transmitted by the terminal, set the working mode of the TCP Read function to standard, that is, wait until all the specified bytes are read or the "timeout milliseconds" are used up, and return the currently read If the number of bytes read is less than the fixed number of bytes set, an error will be reported; the data display module will convert the acquired data into a format, and display the data in a tabular form on the visual interface of the front panel; The data storage module writes the data into the spreadsheet for off-line processing through the Write To Spreadsheet File function.

Referring to Figure 3, the data acquisition module mainly uses multiple vibration signal sensors, which are respectively placed on the side of the mechanical casing, placed in the radial direction of the rotating shaft, distributed across the horizontal axis and the vertical axis, and placed in the center of the cross-section of the rotating shaft, respectively used to measure mechanical equipment Vibration signal of shell, radial lateral vibration signal, longitudinal vibration signal, axial vibration signal, and all vibration signals are transmitted to the control unit and the remote monitoring GUI interface of the upper computer through the multi-channel ADC conversion module at the same time, and the signal is synthesized Analyze, compare, process and display, so as to accurately and quickly monitor the operation of large rotating machinery equipment, and when a fault occurs, it can be judged, displayed and protected in time.

In a word, the present invention uses STM32 to realize multi-channel monitoring of vibration signals at different positions of rotating mechanical equipment, the monitoring is more accurate and faster, and the mechanical fault information at different positions can be found in time; the introduction of TFTLCD touch screen module makes it more convenient for human-computer interaction and implementation of manipulation detection The process and on-site display of monitoring information; the introduction of the GPRS wireless transmission part and the monitoring GUI module of the upper computer, with the help of the SIM900 module and the SIM card connection module, the remote real-time display of the vibration signal is realized, and the online display and analysis of the monitoring data is realized by the upper computer with the help of LabView software It makes the fault monitoring and diagnosis of large rotating machinery equipment more convenient and fast; it helps to further improve the problem of mechanical fault monitoring and diagnosis.

Claims (10)

1. a multi-channel remote vibration signal monitor, is characterized in that: comprise lower computer, GPRS wireless transmission module and power supply module, described lower computer comprises single-chip microcomputer, data acquisition module, control display module, described data acquisition module and The control and display modules are respectively connected to the single-chip microcomputer, and the single-chip microcomputer includes a control unit, an external RTC, an external crystal oscillator and an EEPROM module; the data acquisition module includes multiple vibration signal sensors, a signal conditioning amplifier circuit and a multi-channel ADC conversion module; the control display module includes a TFTLCD touch screen module ; GPRS wireless transmission module comprises SIM900 module and SIM card connection module, and described SIM900 module is connected with single-chip microcomputer, establishes connection with the server on the Internet by GPRS network, and the data collected is sent to server by antenna; Described SIM card connection module and The SIM900 module is electrically connected and powered by the SIM900 module through a voltage conditioning circuit; The power module includes a DC power drive module and a voltage amplification module. The output of the DC power drive module is connected to the input of the voltage amplification module. The output of the voltage amplification module is respectively connected to the power input of the control unit, the input of the TFTLCD touch screen and the power input of the SIM900 module. 2. a kind of multi-channel remote vibration signal monitor according to claim 1, is characterized in that: described data acquisition module has adopted a plurality of vibration signal sensors, carries on-chip DMA controller simultaneously, is used for multi-channel simultaneous measurement The radial vibration signal, axial vibration signal and casing vibration signal of the mechanical device, wherein the radial vibration signal is measured simultaneously from the vibration signals in the longitudinal and transverse directions. 3. A multi-channel remote vibration signal monitoring system, characterized in that: comprising a host computer and a multi-channel remote vibration signal monitor, wherein: The upper computer includes the upper computer monitoring GUI module; The multi-channel remote vibration signal monitor comprises a lower computer, a GPRS wireless transmission module and a power supply module, and the lower computer includes a single-chip microcomputer, a data acquisition module and a control display module, and the data collection module and the control display module are connected with the single-chip microcomputer respectively, and the single-chip microcomputer Contains control unit, external RTC, external crystal oscillator and EEPROM module; data acquisition module includes multiple vibration signal sensors, signal conditioning amplifier circuit and multi-channel ADC conversion module; control display module includes TFTLCD touch screen module; GPRS wireless transmission module comprises SIM900 module and SIM card connection module, and described SIM900 module is connected with single-chip microcomputer, establishes connection with the server on the Internet by GPRS network, and the data collected is sent to server by antenna; Described SIM card connection module and The SIM900 module is electrically connected and powered by the SIM900 module through a voltage conditioning circuit; The power module includes a DC power drive module and a voltage amplification module. The output of the DC power drive module is connected to the input of the voltage amplification module. The output of the voltage amplification module is respectively connected to the power input of the control unit, the input of the TFTLCD touch screen and the power input of the SIM900 module. The upper computer and the lower computer are connected through a GPRS wireless transmission module, and the power supply module supplies power for the monitor. 4. a kind of multi-channel remote vibration signal monitoring system according to claim 3, is characterized in that: described upper computer monitors GUI module and mainly comprises data receiving module, data display module and data storage module, and described data receiving module The module uses the TCPListen function in the LabView communication tool to listen to the connection request from the client, and waits for the GPRS wireless transmission module to pass the TCP connection request at the designated port. After the connection is established, use the TCP Read function to read the data transmitted by the terminal, and use the TCP Read function to work The mode is set to standard, that is, wait until all the specified bytes are read or the "timeout milliseconds" is used up, and the currently read bytes are returned. If the number of read bytes is less than the set fixed number of bytes, an error will be reported ; The data display module converts the data obtained through format conversion, and displays the data in tabular form on the visual interface of the front panel; the data storage module writes the data into the spreadsheet for offline by using the Write To Spreadsheet File function deal with. 5. a kind of multi-channel remote vibration signal monitoring system according to claim 3, is characterized in that: described data acquisition module has adopted a plurality of vibration signal sensors, is equipped with on-chip DMA controller simultaneously, is used for multi-channel simultaneous measurement The radial vibration signal, axial vibration signal and casing vibration signal of the mechanical device, wherein the radial vibration signal is measured simultaneously from the vibration signals in the longitudinal and transverse directions. 6. A multi-channel remote vibration signal monitor according to claim 5, wherein the vibration signal sensor is a piezoelectric acceleration sensor. 7. A kind of multi-channel remote vibration signal monitor according to claim 3, is characterized in that: described voltage amplifying module is powered by DC power supply drive module, designs amplifying circuit respectively according to a plurality of PT1301 chips, is respectively different module Provide working voltage. 8. A multi-channel remote vibration signal monitor according to claim 3, characterized in that: the DC power drive module is composed of two 1.5v dry batteries, and the voltage amplification module converts the 3v voltage into 3.3v, 4v and 5v output, the 3.3v output terminal of the voltage amplification module is connected to the power input terminal of the control unit; the 5v output terminal of the voltage amplification module is connected to the input terminal of the TFTLCD touch screen; the 4v output terminal of the voltage amplification module is connected to the power input terminal of the SIM900 module. 9. A multi-channel remote vibration signal monitor according to claim 3, characterized in that: said control unit adopts ARM processing chip STM32F103RBT6. 10. A kind of multi-channel remote vibration signal monitor according to claim 3, characterized in that: said signal conditioning amplifying circuit comprises a voltage amplifying circuit made up of OPA2336UA chip and a resistance-capacitance filtering circuit, which is used for analog signal Amplification and filtering; the multi-channel ADC conversion module is equipped with AD7705 high-precision analog-to-digital conversion chip, and the acquisition accuracy can reach 16 bits. It uses SPI to communicate with the control unit, and uses DMA to realize simultaneous acquisition of multi-channel signals.