CN117825025A - Wireless mechanical state monitoring system for variable rotation speed working condition - Google Patents
Wireless mechanical state monitoring system for variable rotation speed working condition Download PDFInfo
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Abstract
The embodiment of the invention discloses a wireless mechanical state monitoring system for a variable-rotation-speed working condition, which comprises a vibration temperature sensor, a rotation speed sensor and an acquisition gateway; the vibration temperature sensor is in wireless connection with the acquisition gateway; the rotating speed sensor is connected with the acquisition gateway in a wired way; the vibration temperature sensor is used for acquiring vibration temperature data and transmitting the vibration temperature data to the acquisition gateway, wherein the vibration temperature data comprises vibration signal data and temperature signal data; the rotating speed sensor is used for acquiring a motor rotating speed signal and transmitting the motor rotating speed signal to the acquisition gateway; the acquisition gateway is used for generating a vibration data acquisition trigger signal according to the motor rotating speed signal and transmitting the vibration data acquisition trigger signal to the vibration temperature sensor, wherein the vibration data acquisition trigger signal is used for triggering the vibration temperature sensor to acquire data; the acquisition gateway is also used for uploading the received data to the server, receiving the acquisition configuration and waveform and index data storage issued by the server, and the system is suitable for monitoring the state of mechanical equipment under constant speed and variable speed working conditions, and has the advantages of accurate acquisition data and simple construction.
Description
Technical Field
The invention relates to the technical field of mechanical equipment state monitoring, in particular to a wireless mechanical state monitoring system for a variable-rotation-speed working condition.
Background
The state monitoring of the mechanical equipment is divided into two modes of wired sensor monitoring and wireless sensor monitoring.
The state monitoring mode of the wired mechanical equipment is that the sensors are connected with the detection equipment in a wired mode, each monitoring mechanism needs to be connected with a plurality of wired sensors, the number of sensor cables is large, and site construction is difficult. The wireless mechanical equipment state monitoring mode is that each detection mechanism is connected with the monitoring equipment through a wireless network by using a wireless sensor, so that a sensor cable is omitted, and the site construction is simple.
At present, a wireless mechanical equipment state monitoring system adopts a timing mode to collect mechanical vibration signals, and the mode is only suitable for uniform-speed working conditions. Under the working condition of variable rotation speed of lifting or descending of mechanical equipment, the collected data is inaccurate and cannot be used.
Disclosure of Invention
The invention mainly aims to provide a wireless mechanical state monitoring system under a variable speed working condition, which is suitable for monitoring the state of mechanical equipment under constant speed and variable speed working conditions, and has the advantages of accurate data acquisition and simple construction.
In order to achieve the above purpose, a first aspect of the present application provides a system for monitoring a wireless mechanical state under a variable rotation speed working condition, where the system includes a vibration temperature sensor, a rotation speed sensor and an acquisition gateway;
the temperature vibration sensor is in wireless connection with the acquisition gateway; the rotating speed sensor is connected with the acquisition gateway in a wired way;
the vibration temperature sensor is used for acquiring vibration temperature data and transmitting the vibration temperature data to the acquisition gateway, wherein the vibration temperature data comprises vibration signal data and temperature signal data;
the rotating speed sensor is used for collecting motor rotating speed signals and transmitting the motor rotating speed signals to the collecting gateway;
the acquisition gateway is used for generating a vibration data acquisition trigger signal according to the motor rotating speed signal and transmitting the vibration data acquisition trigger signal to the vibration temperature sensor, and the vibration data acquisition trigger signal is used for triggering the vibration temperature sensor to acquire data;
the acquisition gateway is also used for uploading the received data to a server, and receiving the acquisition configuration and waveform and index data storage issued by the server.
In an alternative embodiment, the vibration temperature sensor comprises an accelerometer, an ADC chip, a reference source, a wireless system on a chip, a static random access memory, a temperature sensor, a lithium battery;
the accelerometer and the reference source are respectively connected with the ADC chip; the ADC chip is connected with the wireless system-level chip; the temperature sensor is connected with the wireless system-on-chip through a comparator; the wireless system-on-chip is connected with the static random access memory and the lithium battery;
the accelerometer is used for acquiring the vibration signal data; the temperature sensor is used for collecting temperature signal data;
after ADC conversion is carried out on the vibration signal data acquired by the accelerometer through the ADC chip, the vibration signal data are transmitted to the wireless system level chip through SPI for data processing;
the wireless system level chip is used for processing the vibration signal data, outputting an acceleration peak value, an acceleration effective value, a speed effective value, an envelope, an original acceleration waveform and temperature data, and transmitting the data to the acquisition gateway;
the wireless system level chip is further used for keeping long connection with the acquisition gateway through Bluetooth, receiving a rotation speed trigger signal issued by the acquisition gateway, and starting vibration data acquisition when the rotation speed trigger signal reaches a rotation speed trigger threshold.
In an alternative embodiment, the accelerometer includes:
the triaxial accelerometer is used for measuring vibration signals in the X/Y axis direction;
and the single-axis accelerometer is used for measuring vibration signals in the Z-axis direction.
In an alternative embodiment, the wireless system on a chip is an EFR32MG24 single chip;
the ADC chip adopts SGM58602 24-bit Delta-Sigma ADC.
In an alternative embodiment, the acquisition gateway comprises a core board, a rotation speed acquisition unit, a wireless single chip transceiver, a 4G module, an RJ45 Ethernet, and a DC-DC power supply system;
the core board is respectively connected with the rotating speed acquisition unit, the wireless single-chip transceiver, the 4G module, the RJ45 Ethernet and the DC-DC power supply system;
the core board is used for completing the acquisition of the motor rotating speed signal, outputting a rotating speed index and a rotating speed waveform, transmitting the vibration data acquisition triggering signal to the vibration temperature sensor when judging that the motor rotating speed signal reaches a rotating speed triggering threshold, receiving the vibration temperature data acquired by the wireless single-chip transceiver, and processing and outputting a result;
the rotating speed acquisition unit is used for acquiring the motor rotating speed signal acquired by the rotating speed sensor;
the 4G module and the RJ45 Ethernet are used for transmitting the data processed by the acquisition gateway to the server for display and diagnosis analysis of the client.
In an alternative embodiment, the core board is a Zynq-7020 core board, comprising an FPGA architecture and an ARM processor, wherein:
the FPGA architecture is used for completing the acquisition of the motor rotating speed signal, outputting a rotating speed index and a rotating speed waveform, and the ARM processor is used for receiving the vibration temperature data acquired by the wireless single-chip transceiver, processing and outputting a result;
the ARM processor is specifically used for transmitting the vibration data acquisition trigger signal to the vibration temperature sensor when the motor rotation speed signal reaches a rotation speed trigger threshold.
In an alternative embodiment, the wireless single-chip transceiver is an EFR32MG24 single-chip transceiver supporting ZIGBEE and Bluetooth.
In an alternative embodiment, the acquisition gateway adopts 12V DC power supply, wherein after the 12V power supply passes through an anti-surge circuit formed by two-stage common mode inductance and piezoresistor, the 12V is converted into 5V to supply power for the core board through 1 path of DC-DC TLV62130a, and the other 1 path of TLV62130a is used for separately supplying power for the 4G module.
In an alternative embodiment, the system further comprises a client;
the client is used for communicating with the server and providing equipment tree management, alarm threshold setting and diagnosis analysis functions for a user;
the equipment tree management mainly comprises component parameter setting and measuring point association;
the alarm threshold setting mainly comprises: by setting four-level alarm thresholds for acceleration, speed, temperature, rotation speed and the like, the system alarms once the parameters set by the corresponding thresholds are reached;
the diagnostic analysis function includes: time domain waveforms, frequency spectra, index data, envelope demodulation, and order analysis tools are provided for the user.
In an alternative embodiment, the system further comprises a terminal device;
the terminal equipment is used for carrying out temporary configuration, information reading and signal spot inspection on the vibration temperature sensor.
The application provides a variable-rotation-speed working condition wireless mechanical state monitoring system, which comprises a vibration temperature sensor, a rotation speed sensor and an acquisition gateway; the temperature vibration sensor is in wireless connection with the acquisition gateway; the rotating speed sensor is connected with the acquisition gateway in a wired way; the vibration temperature sensor is used for acquiring vibration temperature data and transmitting the vibration temperature data to the acquisition gateway, wherein the vibration temperature data comprises vibration signal data and temperature signal data; the rotating speed sensor is used for collecting motor rotating speed signals and transmitting the motor rotating speed signals to the collecting gateway; the acquisition gateway is used for generating a vibration data acquisition trigger signal according to the motor rotating speed signal and transmitting the vibration data acquisition trigger signal to the vibration temperature sensor, and the vibration data acquisition trigger signal is used for triggering the vibration temperature sensor to acquire data; the acquisition gateway is also used for uploading the received data to a server, and receiving the acquisition configuration and waveform and index data storage issued by the server; the method is suitable for uniform mechanical monitoring scenes such as wind power, coal mines and the like, can also be suitable for variable working condition scenes such as port machines and the like, is accurate in data acquisition, is simple to implement and does not need a large amount of wiring.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
fig. 1 is a schematic structural diagram of a system for monitoring a wireless mechanical state under a variable rotation speed working condition according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another system for monitoring the state of a variable speed wireless machine according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a vibration temperature sensor according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an acquisition gateway according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The SoC referred to in this embodiment of the present application is generally referred to as a System on Chip (SoC), also known as a System on Chip (SoC), meaning that it is a product that is an integrated circuit with a dedicated target that contains the entire System and has embedded software. It is also a technique to achieve the whole process from determining the system functions, to software/hardware partitioning, and to complete the design.
The ZigBee, also called ZigBee, referred to in the embodiments of the present application is a wireless network protocol for low-speed short-distance transmission, and the bottom layer is a media access layer and a physical layer that adopt IEEE 802.15.4 standard specifications. The main characteristics are low speed, low power consumption, low cost, support of a large number of network nodes, support of various network topologies, low complexity, rapidness, reliability and safety.
The Bluetooth (BT) technology referred to in the embodiments of the present application is a global standard for wireless data and voice communication, which is a special short-range wireless technology connection for establishing a communication environment for fixed and mobile devices based on a low-cost short-range wireless connection.
The SPI interface in the embodiment of the present application is a communication interface of a synchronous serial bus (Serial Peripheral Interface) that is used for peripheral devices such as a Flash memory (e.g., NOR Flash & Nand Flash), an ADC, and an LCD controller. The peripheral expansion capability of the processor is greatly enhanced.
RGMII (Reduced Gigabit Media Independent Interface) is Reduced GMII (gigabit media independent interface). RGMII adopts a 4-bit data interface, an operating clock is 125MHz, and data is transmitted simultaneously on the rising edge and the falling edge, so that the transmission rate can reach 1000Mbps.
A universal asynchronous receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) is a universal serial data bus for asynchronous communications. The bus communicates bi-directionally, enabling full duplex transmission and reception. In embedded designs, UARTs are used to communicate with PCs, including with monitor debuggers and other devices such as EEPROMs.
The low dropout linear regulator (lDO) is a new generation of integrated circuit voltage regulator, which differs from the three terminal voltage regulator at its most important point in that it is a miniature system-on-chip with very low consumption. The current main channel control circuit can be used for current main channel control, and a hardware circuit such as a mosfet, a Schottky diode, a sampling resistor, a divider resistor and the like with extremely low on-line on-resistance is integrated on a chip, and the current main channel control circuit has the functions of overcurrent protection, overtemperature protection, a precise reference source, a differential amplifier, a delay and the like.
Embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application.
Referring to fig. 1, a schematic structural diagram of a system for monitoring a wireless mechanical state under a variable rotation speed condition is provided in an embodiment of the present application, as shown in fig. 1, the system 100 for monitoring a wireless mechanical state under a variable rotation speed condition includes a vibration temperature sensor 110, a rotation speed sensor 120, and an acquisition gateway 130;
the vibration temperature sensor 110 is connected with the acquisition gateway 130 in a wireless manner; the rotation speed sensor 120 is connected with the acquisition gateway 130 in a wired manner;
the vibration temperature sensor 110 is configured to collect vibration temperature data, and transmit the vibration temperature data to the collection gateway 130, where the vibration temperature data includes vibration signal data and temperature signal data;
the rotation speed sensor 120 is configured to collect a rotation speed signal of a motor, and transmit the rotation speed signal of the motor to the collection gateway 130;
the collecting gateway 130 is configured to generate a vibration data collecting trigger signal according to the motor rotation speed signal and transmit the vibration data collecting trigger signal to the vibration temperature sensor 110, where the vibration data collecting trigger signal is used to trigger the vibration temperature sensor 110 to perform data collection;
the acquisition gateway 130 is further configured to upload the received data to a server, and receive the acquisition configuration and waveform and index data sent by the server for storage.
In an alternative embodiment, variable speed operating condition wireless mechanical condition monitoring system 100 further includes a client;
the client can communicate with the server to provide functions of equipment tree management, alarm threshold setting, diagnosis analysis and the like for the user.
Alternatively, the server may be a cloud server.
In an alternative embodiment, variable speed operating mode wireless mechanical condition monitoring system 100 further includes a terminal device;
the terminal equipment can perform functions of temporary configuration, information reading, signal point detection and the like on the vibration temperature sensor, and can be a mobile phone, a computer and the like.
Referring specifically to fig. 2, fig. 2 is a schematic structural diagram of another wireless mechanical state monitoring system under a variable rotation speed working condition according to an embodiment of the present application. As shown in fig. 2, the variable speed operating mode wireless mechanical state monitoring system 200 includes ZIGBEE & BT temperature sensors (3 are shown in fig. 2), a rotation speed sensor, a ZIGBEE & BT acquisition gateway, a mobile phone, a cloud server, and a client.
The ZIGBEE and BT vibration temperature sensor is responsible for collecting vibration signals and temperature signals, and vibration temperature data are transmitted to the collecting gateway through ZIGBEE.
The rotating speed sensor is responsible for collecting motor rotating speed signals, is connected with the collecting gateway in a wired mode, and generates vibration data collecting trigger signals after being processed by the collecting gateway, and transmits the vibration data collecting trigger signals to the vibration temperature sensor through Bluetooth, so that the vibration temperature sensor is triggered to collect data.
The ZIGBEE and BT acquisition gateway is responsible for the acquisition and processing of rotating speed signals, the acquisition and processing of vibration temperature data, the uploading of acquired data to the cloud server, and the acquisition configuration, waveform and index data storage issued by the cloud server are received.
The mobile phone terminal APP can temporarily configure the sensor through Bluetooth, read information, perform signal spot detection and other functions.
The client can display time domain waveform data, frequency spectrum data, index data, alarm data, configuration, issuing and the like for the client.
The vibration temperature sensor in the present application will be described in detail.
In an alternative embodiment, the vibration temperature sensor comprises an accelerometer, an ADC chip, a reference source, a wireless system-on-chip, a static random access memory, a temperature sensor and a lithium battery;
the accelerometer and the reference source are respectively connected with the ADC chip; the ADC chip is connected with the wireless system-level chip; the temperature sensor is connected with the wireless system-level chip through a comparator; the wireless system-on-chip is connected with the static random access memory and the lithium battery;
the accelerometer is used for collecting the vibration signal data; the temperature sensor is used for collecting temperature signal data;
the vibration signal data acquired by the accelerometer are converted by the ADC chip and then transmitted to the wireless system level chip for data processing through SPI;
the wireless system-level chip is used for processing the vibration signal data, outputting an acceleration peak value, an acceleration effective value, a speed effective value, an envelope, an original acceleration waveform and temperature data, and transmitting the data to the acquisition gateway;
the wireless system-level chip is further used for keeping long connection with the acquisition gateway through Bluetooth, receiving a rotation speed trigger signal sent by the acquisition gateway, and starting vibration data acquisition when the rotation speed trigger signal reaches a rotation speed trigger threshold.
The above-mentioned wireless system-on-chip may be understood as a system-on-chip (SoC) supporting wireless communication functions (e.g., ZIGBEE, BT).
A Static Random-Access Memory (SRAM) is one type of Random Access Memory. By "static", it is meant that such memory is constantly maintained for data stored therein as long as it remains powered on.
The lithium battery can be a detachable lithium battery, and the power supply mode can be adjusted according to the requirement.
In an alternative embodiment, the accelerometer includes:
the triaxial accelerometer is used for measuring vibration signals in the X/Y axis direction;
and the single-axis accelerometer is used for measuring vibration signals in the Z-axis direction.
The chip, the accelerometer and other elements can be selected or replaced according to the needs in the embodiment of the application, for example, the wireless system-level chip can be an EFR32MG24 single chip; the ADC chip can adopt SGM58602 24-bit Delta-Sigma ADC.
Fig. 3 is a schematic structural diagram of a vibration temperature sensor according to an embodiment of the present application. As shown in fig. 3, the ZIGBEE and BT temperature sensor mainly comprises an accelerometer, a 24-bit ADC, a reference source, a ZIGBEE and BT SoC, an SRAM, a temperature sensor and a detachable lithium battery; the related functions are described as follows:
(1) Vibration signal data acquisition: vibration signal acquisition is mainly completed by two accelerometers, namely ADXL316 and ADXL 1003. ADXL316 is a low power consumption, low noise, three-axis accelerometer, provides voltage output through signal conditioning, and has a measuring range of + -16 g, and can measure not only static acceleration, but also dynamic acceleration caused by motion, impact or vibration, and is used for measuring vibration signals in X/Y axis directions in the system. ADXL1003 is a low power, low noise, wide bandwidth (0 to 15 KHZ), wide range (±200 g) single axis accelerometer that provides a signal conditioned voltage output that is used in the present system to measure vibration signals in the Z-axis direction. The X/Y/Z triaxial vibration signal is directly connected with the 24-bit ADC analog input end.
(2) Temperature signal acquisition: the temperature signal acquisition is mainly completed by a temperature sensor LMT01 and a comparator. The LMT01 is a high-precision dual-pin temperature sensor, the measuring range is-50 ℃ to 150 ℃, and the precision is +/-0.5 ℃. The output signal is a pulse sequence, the waveform is shaped by a comparator and then is connected with the GPIO of the EFR32MG24 SoC, and the EFR32MG24 SoC can obtain corresponding temperature data through counting.
(3) ADC conversion: the ADC conversion adopts SGM58602 24-bit Delta-Sigma ADC, has low noise, supports 3 single-ended analog channels, has a maximum sampling rate of 60kSPS, integrates an input buffer and a 128-time programmable gain amplifier, and supports standard SPI communication. After the vibration signals acquired by the accelerometer are converted by the ADC, the vibration signals are transmitted to the EFR32MG24 through the SPI, and the EFR32MG24 performs corresponding data processing.
(4) Data processing and wireless transmission: the whole sensor data processing and wireless transmission are completed through the EFR32MG24 single chip. EFR32MG24 is a wireless SoC and supports multiple 2.4GHz wireless protocols such as BLE5.3, zigbee, thread, matter and the like. The sensor processes vibration data acquisition through the wireless SoC and outputs an acceleration peak value, an acceleration effective value, a speed effective value, an envelope, an original acceleration waveform and temperature data; and the output data is transmitted to the acquisition gateway through ZIGBEE, and the acquisition gateway performs further algorithm processing. The sensor is long-connected with Bluetooth of the acquisition gateway through Bluetooth of the EFR32MG24, receives a rotation speed trigger signal issued by the acquisition gateway, and starts vibration data acquisition once the rotation speed trigger threshold is reached.
(5) And (3) a power supply system: the whole wireless sensor is powered by a lithium battery, and the battery capacity is 9000mAh. The battery can be used for 2 years with the calculation of the 10 minute acquisition and the waveform data sent once for 2 hours.
The acquisition gateway in this application is described in detail below.
In an alternative embodiment, the acquisition gateway comprises a core board, a rotation speed acquisition unit, a wireless single-chip transceiver, a 4G module, an RJ45 Ethernet and a DC-DC power supply system;
the core board is respectively connected with the rotating speed acquisition unit, the wireless single-chip transceiver, the 4G module, the RJ45 Ethernet and the DC-DC power supply system;
the core board is used for completing the acquisition of the motor rotating speed signal, outputting a rotating speed index and a rotating speed waveform, transmitting the vibration data acquisition triggering signal to the vibration temperature sensor when judging that the motor rotating speed signal reaches a rotating speed triggering threshold, receiving the vibration temperature data acquired by the wireless single-chip transceiver, and processing and outputting a result;
the rotating speed acquisition unit is used for acquiring the motor rotating speed signal acquired by the rotating speed sensor;
the 4G module and the RJ45 Ethernet are used for transmitting the data processed by the acquisition gateway to the server, and the client side displays and diagnoses.
Wherein the wireless single-chip transceiver is a single-chip transceiver supporting wireless communication functions (e.g., ZIGBEE, BT),
the units and modules such as the core board can select elements with specific models according to requirements, and the embodiment of the application does not limit the units and modules. For example, a Zynq-7020 core board may be employed and the wireless single chip transceiver may be an EFR32MG24 single chip transceiver supporting ZIGBEE and bluetooth.
The Zynq-7020 core board comprises an FPGA architecture and an ARM processor, wherein:
the FPGA architecture is used for completing the acquisition of the motor rotating speed signal, outputting a rotating speed index and a rotating speed waveform, and the ARM processor is used for receiving the vibration temperature data acquired by the wireless single-chip transceiver, processing and outputting a result;
the ARM processor is specifically used for transmitting the vibration data acquisition trigger signal to the vibration temperature sensor when the motor rotation speed signal reaches a rotation speed trigger threshold.
Fig. 4 is a schematic structural diagram of an acquisition gateway according to an embodiment of the present application. As shown in fig. 4, the acquisition gateway is a ZIGBEE & BT gateway, and mainly comprises a Zynq-7020 core board, a 4-way rotation speed acquisition unit, a ZIGBEE & BT EFR32MG24 single-chip transceiver, a 4G module, an RJ45 ethernet, and a DC-DC power system; the related functions are described as follows:
(1) Master control and function: the Zynq-7020 core board adopts a Zynq-7000 All Programmable SoC platform based on a 28nm process flow, an ARM processor and an FPGA framework are tightly integrated, and a PS unit has dual-core ARM Cortex-A9 MPCore, so that the Zynq-7020 core board has the characteristics of high performance and low power consumption, and can well meet industrial requirements.
In the system, the FPGA framework mainly completes the acquisition of the rotating speed data, outputs rotating speed indexes and rotating speed waveforms. ARM is responsible for receiving vibration temperature data acquired by ZIGBEE and BT transceivers, processing related algorithms and outputting results, and is convenient for diagnosis and analysis of clients.
(2) And (3) a variable working condition data acquisition process: in a uniform mechanical vibration scene, the rotating speed data of the motor is not measured independently, and the rotating speed can be calculated and the running health state of the motor can be analyzed through the vibration signal data; however, in a vibration scene of the variable-speed machinery, the motor rotation speed is required to be measured independently and vibration signal data acquisition is triggered correspondingly, so that the running health state of the motor under the variable-speed working condition can be analyzed effectively. The acquisition gateway is independently connected with the rotating speed sensor, under the variable rotating speed working condition scene, once the rotating speed reaches a trigger threshold, the ARM transmits a rotating speed trigger signal to the vibration temperature sensor through Bluetooth, data acquisition of the sensor is started, and after the data acquisition is completed, related data are returned to the acquisition gateway through ZIGBEE. In the whole process, bluetooth keeps long connection, and provides conditions for rotation speed triggering vibration acquisition. Under the condition of 20ms connection interval, the Bluetooth power consumption is 0.18mA, and the low power consumption requirement of the whole system is met.
(3) A power supply section: the whole gateway adopts 12V direct current power supply, after a 12V power supply passes through an anti-surge circuit formed by a two-stage common mode inductor and a piezoresistor, 12V is converted into 5V to be used for Zynq-7020 power supply through 1-path DC-DC TLV62130A, and the other 1-path TLV62130A is used for independently supplying power to a 4G module.
(4) A data transmission section: the whole gateway can transmit the data processed by the gateway to a background server in a mode of 4G, RJ45 and the like for display and diagnosis analysis of a client.
In an alternative embodiment, a client in the system mainly provides functions of equipment tree management, alarm threshold setting, diagnosis analysis and the like for a user, wherein:
the main functions of the equipment tree are as follows: component parameter setting, measuring point association and the like;
the alarm threshold is set with the main functions: setting 4-level alarm thresholds for acceleration, speed, temperature, rotating speed and the like, and giving an alarm once the parameters set by the thresholds are reached;
diagnostic analysis major functions: the method provides tools such as time domain waveform, frequency spectrum, index data, envelope demodulation, order analysis and the like for users, and helps the users to analyze the running state of equipment well.
The user operation interface of the client may display corresponding data content and functional components, which is not limited in the embodiment of the present application.
According to the variable speed working condition wireless mechanical state monitoring system, a rotating speed trigger signal transmission method can be achieved through Bluetooth, and a variable speed working condition wireless vibration data acquisition method is provided. In addition, the ZIGBEE data transmission is triggered through the low-power-consumption Bluetooth long connection, so that a system low-power-consumption method and a system low-power-consumption implementation are realized.
The variable-speed working condition wireless mechanical state monitoring system is simple to implement, does not need a large amount of wiring, and can be suitable for uniform-speed mechanical monitoring scenes such as wind power, coal mines and the like, and also suitable for variable working condition scenes such as port machines and the like. In addition, the system has low power consumption and can meet the long-time equipment state monitoring.
Those skilled in the art will appreciate that implementing all or part of the above-described embodiments of the system may be accomplished by computer programs stored on a non-volatile computer readable storage medium, which when executed, may include data acquisition and processing procedures as described in the above-described embodiments. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The system is characterized by comprising a vibration temperature sensor, a rotating speed sensor and an acquisition gateway;
the temperature vibration sensor is in wireless connection with the acquisition gateway; the rotating speed sensor is connected with the acquisition gateway in a wired way;
the vibration temperature sensor is used for acquiring vibration temperature data and transmitting the vibration temperature data to the acquisition gateway, wherein the vibration temperature data comprises vibration signal data and temperature signal data;
the rotating speed sensor is used for collecting motor rotating speed signals and transmitting the motor rotating speed signals to the collecting gateway;
the acquisition gateway is used for generating a vibration data acquisition trigger signal according to the motor rotating speed signal and transmitting the vibration data acquisition trigger signal to the vibration temperature sensor, and the vibration data acquisition trigger signal is used for triggering the vibration temperature sensor to acquire data;
the acquisition gateway is also used for uploading the received data to a server, and receiving the acquisition configuration and waveform and index data storage issued by the server.
2. The variable speed operating mode wireless mechanical state monitoring system according to claim 1, wherein the vibration temperature sensor comprises an accelerometer, an ADC chip, a reference source, a wireless system-level chip, a static random access memory, a temperature sensor, and a lithium battery;
the accelerometer and the reference source are respectively connected with the ADC chip; the ADC chip is connected with the wireless system-level chip; the temperature sensor is connected with the wireless system-on-chip through a comparator; the wireless system-on-chip is connected with the static random access memory and the lithium battery;
the accelerometer is used for acquiring the vibration signal data; the temperature sensor is used for collecting temperature signal data;
after ADC conversion is carried out on the vibration signal data acquired by the accelerometer through the ADC chip, the vibration signal data are transmitted to the wireless system level chip through SPI for data processing;
the wireless system level chip is used for processing the vibration signal data, outputting an acceleration peak value, an acceleration effective value, a speed effective value, an envelope, an original acceleration waveform and temperature data, and transmitting the data to the acquisition gateway;
the wireless system level chip is further used for keeping long connection with the acquisition gateway through Bluetooth, receiving a rotation speed trigger signal issued by the acquisition gateway, and starting vibration data acquisition when the rotation speed trigger signal reaches a rotation speed trigger threshold.
3. The variable speed operating condition wireless mechanical condition monitoring system of claim 2, wherein the accelerometer comprises:
the triaxial accelerometer is used for measuring vibration signals in the X/Y axis direction;
and the single-axis accelerometer is used for measuring vibration signals in the Z-axis direction.
4. The variable speed operating mode wireless mechanical state monitoring system according to claim 2, wherein the wireless system-on-chip is an EFR32MG24 single chip;
the ADC chip adopts SGM58602 24-bit Delta-Sigma ADC.
5. The variable speed operating mode wireless mechanical state monitoring system according to claim 1, wherein the acquisition gateway comprises a core board, a rotation speed acquisition unit, a wireless single-chip transceiver, a 4G module, an RJ45 Ethernet and a DC-DC power supply system;
the core board is respectively connected with the rotating speed acquisition unit, the wireless single-chip transceiver, the 4G module, the RJ45 Ethernet and the DC-DC power supply system;
the core board is used for completing the acquisition of the motor rotating speed signal, outputting a rotating speed index and a rotating speed waveform, transmitting the vibration data acquisition triggering signal to the vibration temperature sensor when judging that the motor rotating speed signal reaches a rotating speed triggering threshold, receiving the vibration temperature data acquired by the wireless single-chip transceiver, and processing and outputting a result;
the rotating speed acquisition unit is used for acquiring the motor rotating speed signal acquired by the rotating speed sensor;
the 4G module and the RJ45 Ethernet are used for transmitting the data processed by the acquisition gateway to the server for display and diagnosis analysis of the client.
6. The variable speed operating mode wireless mechanical state monitoring system of claim 5, wherein the core board is a Zynq-7020 core board comprising an FPGA architecture and an ARM processor, wherein:
the FPGA architecture is used for completing the acquisition of the motor rotating speed signal, outputting a rotating speed index and a rotating speed waveform, and the ARM processor is used for receiving the vibration temperature data acquired by the wireless single-chip transceiver, processing and outputting a result;
the ARM processor is specifically used for transmitting the vibration data acquisition trigger signal to the vibration temperature sensor when the motor rotation speed signal reaches a rotation speed trigger threshold.
7. The variable speed operating mode wireless mechanical condition monitoring system of claim 5, wherein the wireless single-chip transceiver is an EFR32MG24 single-chip transceiver supporting ZIGBEE and bluetooth.
8. The system of claim 5, wherein the collection gateway is powered by 12V DC, and the 12V power supply is powered by 1 path of DC-DC TLV62130a after passing through an anti-surge circuit formed by two stages of common mode inductances and piezoresistors, and the other 1 path of TLV62130a is used for independently powering the 4G module.
9. The variable speed operating condition wireless mechanical condition monitoring system of claim 1, further comprising a client;
the client is used for communicating with the server and providing equipment tree management, alarm threshold setting and diagnosis analysis functions for a user;
the equipment tree management mainly comprises component parameter setting and measuring point association;
the alarm threshold setting mainly comprises: by setting four-level alarm thresholds for acceleration, speed, temperature, rotation speed and the like, the system alarms once the parameters set by the corresponding thresholds are reached;
the diagnostic analysis function includes: time domain waveforms, frequency spectra, index data, envelope demodulation, and order analysis tools are provided for the user.
10. The variable speed operating mode wireless mechanical condition monitoring system of claim 1, wherein the system further comprises a terminal device;
the terminal equipment is used for carrying out temporary configuration, information reading and signal spot inspection on the vibration temperature sensor.
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| CN202994209U (en) * | 2012-11-23 | 2013-06-12 | 北京海顿新科技术股份有限公司 | Monitoring device for rotating equipment |
| US20150168268A1 (en) * | 2013-12-16 | 2015-06-18 | Tdg Aerospace, Inc. | Monitoring systems and methods |
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| CN115396461A (en) * | 2022-05-10 | 2022-11-25 | 湖南科技大学 | Trigger type vibration data acquisition system suitable for low-speed variable working condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202994209U (en) * | 2012-11-23 | 2013-06-12 | 北京海顿新科技术股份有限公司 | Monitoring device for rotating equipment |
| US20150168268A1 (en) * | 2013-12-16 | 2015-06-18 | Tdg Aerospace, Inc. | Monitoring systems and methods |
| CN114415013A (en) * | 2021-12-15 | 2022-04-29 | 许昌初心智能电气科技有限公司 | Industrial motor service life prediction and operation and maintenance system |
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