Motor monitoring system and motor abnormal state monitoring method

Abstract

The invention discloses a motor monitoring system and a motor abnormal state monitoring method, is used for monitoring a motor, and relates to the technical field of embedded system development. The system comprises a monitoring controller, a plurality of temperature measuring devices and a plurality of vibration measuring devices, each temperature measurer is arranged on the outer surface of the motor and used for collecting temperature information of the motor, and the arrangement positions of the temperature measurers on the outer surface are different; each vibration measurer is arranged on the outer surface of the motor and used for collecting vibration information of the motor, and the arrangement positions of the vibration measurers on the outer surface are different; the monitoring controller is connected with each temperature measuring device and each vibration measuring device, and is used for receiving the temperature information collected by each temperature measuring device and the vibration information collected by each vibration measuring device, and displaying the temperature information and the vibration information. According to the system, the monitoring capability and the monitoring efficiency of the temperature and the vibration of the motor can be remarkably enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of embedded system development, and in particular to a motor monitoring system and a motor abnormal state monitoring method. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It is widely used in production and life. During the operation and experiment of the motor, it may be necessary to monitor the temperature and vibration of the motor in order to monitor the operating status of the motor.

[0003] However, most of the existing motors do not have temperature and vibration measurement points installed inside. When measuring the temperature and vibration of such motors, two sets of instruments, a handheld temperature measuring instrument and a handheld vibration measuring instrument, are needed to monitor the temperature and vibration of the motor, so the monitoring efficiency of the motor temperature and vibration is low. At the same time, the handheld temperature measuring instrument and the handheld vibration measuring instrument can only measure the temperature and vibration of the motor at a single point, so it is impossible to comprehensively monitor the temperature and vibration information of various parts of the motor, resulting in a low monitoring capability of the temperature and vibration of the motor. Summary of the invention

[0004] In view of this, the present application provides a motor monitoring system and a motor abnormal state monitoring method, the main purpose of which is to solve the technical problems of low measurement capability and measurement efficiency of the temperature and vibration of the motor.

[0005] According to a first aspect of the present invention, there is provided a motor monitoring system for monitoring the temperature and vibration of a motor, the motor monitoring system comprising a monitoring controller, a plurality of temperature measuring devices and a plurality of vibration measuring devices;

[0006] Each of the temperature measuring devices is disposed on the outer surface of the motor, and is used to collect temperature information of the motor, wherein each of the temperature measuring devices is disposed at a different position on the outer surface;

[0007] Each of the vibration measuring devices is disposed on the outer surface of the motor to collect vibration information of the motor, wherein each of the vibration measuring devices is disposed at a different position on the outer surface;

[0008] The monitoring controller is respectively connected to each of the temperature measuring devices and each of the vibration measuring devices;

[0009] The monitoring controller is used to receive the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices, and display the temperature information and the vibration information.

[0010] Optionally, the temperature measurer includes a temperature sensor and a first analog-to-digital converter; the temperature sensor is arranged at the outer surface of the motor, and is used to collect temperature information of the motor; the first analog-to-digital converter is respectively connected to the temperature sensor and the monitoring controller, and is used to obtain the temperature information, and performs analog-to-digital conversion on the temperature information to obtain the temperature information in the form of a digital signal, and sends the temperature information in the form of a digital signal to the monitoring controller; the vibration measurer includes a vibration sensor and a second analog-to-digital converter; the vibration sensor is arranged at the outer surface of the motor, and is used to collect vibration information of the motor; the second analog-to-digital converter is respectively connected to the vibration sensor and the monitoring controller, and is used to obtain the vibration information, and performs analog-to-digital conversion on the vibration information to obtain the vibration information in the form of a digital signal, and sends the vibration information in the form of a digital signal to the monitoring controller.

[0011] Optionally, the monitoring controller includes a main controller and an information display; the main controller is connected to each of the temperature measuring devices and each of the vibration measuring devices, respectively, for receiving the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices; the information display is connected to the main controller, for receiving the temperature information and the vibration information, and displaying the temperature information and the vibration information.

[0012] Optionally, the main controller has a digital signal interaction terminal; the digital signal interaction terminal is used to connect to a remote host computer so as to communicate between the main controller and the host computer based on digital signals.

[0013] Optionally, the monitoring controller also includes a resistor-capacitor filter circuit; the main controller also has a pulse width modulation signal interaction terminal; the pulse width modulation signal interaction terminal is connected to the input terminal of the resistor-capacitor filter circuit, and is used to send a pulse width modulation signal to the resistor-capacitor filter circuit; the output terminal of the resistor-capacitor filter circuit is used to connect to an external device, and is used to convert the pulse width modulation signal into an analog signal, and send the analog signal to the external device, so as to establish a communication connection between the main controller and the external device.

[0014] According to a second aspect of the present invention, a method for monitoring abnormal state of a motor is provided, which is applied to a monitoring controller in the motor monitoring system as described above, and the method comprises:

[0015] Acquiring the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices;

[0016] Based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices, the operating state of the motor is determined.

[0017] Optionally, the operating status of the motor is determined based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices, including: comparing the temperature information collected by each of the temperature measuring devices with a preset temperature alarm threshold value, to determine whether there is temperature information higher than the temperature alarm threshold value, and comparing the vibration information collected by each of the vibration measuring devices with a preset vibration alarm threshold value, to determine whether there is vibration information higher than the vibration alarm threshold value; if there is temperature information higher than the temperature alarm threshold value, or if there is vibration information higher than the vibration alarm threshold value, it is determined that the motor is in an abnormal state.

[0018] Optionally, determining the operating status of the motor based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices includes: obtaining the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices at a current moment, and calculating a temperature information mean of all of the temperature information and a vibration information mean of all of the vibration information; obtaining historical temperature information collected by each of the temperature measuring devices and the historical vibration information collected by each of the vibration measuring devices at historical moments, and calculating a historical temperature information mean of all of the historical temperature information and a historical vibration information mean of all of the historical vibration information, wherein the historical moment is a moment that is a preset time interval away from the current moment; determining the operating status of the motor based on the temperature information mean, the vibration information mean, the historical temperature information mean and the historical vibration information mean.

[0019] Optionally, the operating state of the motor is determined based on the temperature information mean, the vibration information mean, the historical temperature information mean and the historical vibration information mean, including: based on a preset vibration value deviation coefficient, correcting the historical vibration information mean to obtain a historical vibration information correction value, and calculating the difference between the vibration information mean and the historical vibration information correction value to obtain a vibration deviation value; based on a preset temperature value deviation coefficient, correcting the historical temperature information mean to obtain a historical temperature information correction value, and calculating the difference between the temperature information mean and the historical temperature information correction value to obtain a temperature deviation value; calculating a first product of the vibration deviation value and a preset vibration weight coefficient, and a second product of the temperature deviation value and a preset temperature weight coefficient, and calculating the sum of the first product and the second product to obtain a motor comprehensive state quantity coefficient; determining whether the motor comprehensive state quantity coefficient is greater than a preset motor normal state threshold, and when the motor comprehensive state quantity coefficient is greater than the motor normal state threshold, determining that the motor is in an abnormal state.

[0020] Optionally, the control output end of the monitoring controller is connected to the controlled end of an external alarm device, so as to control the alarm device to issue an alarm prompt message; after determining that the motor is in an abnormal state, the method further includes: sending an alarm output instruction to the alarm device so that the alarm device issues the alarm prompt message.

[0021] The present invention provides a motor monitoring system and a motor abnormal state monitoring method, which collects vibration information and temperature information of different points on the motor by setting multiple temperature measuring devices and vibration measuring devices at different positions on the outer surface of the motor, and sends the temperature information and vibration information of the above points to the monitoring controller, so that the monitoring controller stores and displays the above temperature information and vibration information. The technical solution of the present application can measure the temperature and vibration of the motor at multiple points and display the measurement results in real time, eliminating the process of manual measurement of the motor by the staff through the handheld measuring instrument, thereby significantly improving the efficiency of monitoring the motor, and can comprehensively measure the temperature and vibration information at various parts of the motor, thereby improving the ability to measure the motor.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of a motor monitoring system provided by an embodiment of the present invention is shown;

[0025] Figure 2a A schematic diagram of the structure of a temperature measuring device provided by an embodiment of the present invention is shown;

[0026] Figure 2b A schematic structural diagram of a vibration measuring device provided by an embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram showing the structure of another motor monitoring system provided by an embodiment of the present invention is shown;

[0028] Figure 4 A schematic diagram showing the connection between a temperature measuring device and a main controller provided by an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram of the structure of an information display provided by an embodiment of the present invention is shown;

[0030] Figure 6 A schematic flow chart of a method for monitoring abnormal state of a motor provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0032] In one embodiment, Figure 1 As shown, a motor monitoring system is provided, and the system is used for monitoring the temperature and vibration of the motor as an example for explanation. The motor monitoring system includes a monitoring controller, multiple temperature measuring devices T and multiple vibration measuring devices V; wherein, the temperature measuring device T can adopt a DS18B20 digital temperature sensor, whose temperature measurement range is -55℃~+125℃, and can output temperature information in the form of a digital signal. The sensor has the characteristics of small size, low hardware overhead, strong anti-interference ability, and high accuracy, and can support up to 3-way temperature signal acquisition; further, the monitoring controller can use a bidirectional input / output (IO) port to establish a connection with the temperature measuring device T, and repeatedly switch the input / output state during the input and output process to achieve switching.

[0033] Furthermore, the vibration measuring device V may be a magnetic vibration sensor with a measuring range of 0-20 mm / s. Furthermore, the temperature measuring device T may also be a magnetic temperature sensor, and the temperature measuring device T and the vibration measuring device V may be respectively attached to the outer surface of the motor by magnetic attraction.

[0034] Specifically, each of the temperature measuring devices T is arranged on the outer surface of the motor to collect temperature information of the motor, wherein the temperature information may be a temperature value, and its unit may be degrees Celsius, and each of the temperature measuring devices T is arranged at a different position on the outer surface; here, all of the temperature measuring devices T may be arranged at different positions of the motor casing, respectively, to collect temperature information at different positions of the motor casing, and the specific setting position of each temperature measuring device T may be determined according to actual conditions.

[0035] Furthermore, each of the vibration measuring devices V is arranged on the outer surface of the motor to collect vibration information of the motor, wherein the vibration information may be a vibration velocity, and its unit may be millimeters per second, and its specific form may also be determined according to actual conditions; further, each of the vibration measuring devices V is arranged at a different position on the outer surface, and may be an axial position or a radial position of the motor; by respectively arranging all of the vibration measuring devices V at different positions of the motor housing, vibration information at different positions of the motor housing may be collected, and here, the specific arrangement position of each vibration measuring device V may be determined according to actual conditions.

[0036] Further, the monitoring controller is connected to each of the temperature measuring devices T and each of the vibration measuring devices V, respectively, and the monitoring controller is used to receive the temperature information collected by each of the temperature measuring devices T and the vibration information collected by each of the vibration measuring devices V, and display the temperature information and the vibration information. Here, a storage unit and a liquid crystal display may be provided at the monitoring controller to store and display the collected temperature information and vibration information of each point of the motor.

[0037] The motor monitoring system provided by the present application is to set a plurality of temperature measuring devices and vibration measuring devices at different positions on the outer surface of the motor to collect vibration information and temperature information of different points on the motor, and send the temperature information and vibration information of the above points to the monitoring controller, so that the monitoring controller can store and display the above temperature information and vibration information. The technical solution of the present application can measure the temperature and vibration of the motor at multiple points and display the measurement results in real time, eliminating the process of manual measurement of the motor by the staff through the handheld measuring instrument, significantly improving the efficiency of monitoring the motor, and can comprehensively measure the temperature and vibration information of various parts of the motor, thereby improving the ability to monitor the motor.

[0038] In an optional embodiment, if Figure 2a As shown, the temperature measurer includes a temperature sensor 10 and a first analog-to-digital converter 20 .

[0039] Specifically, the temperature sensor 10 is disposed on the outer surface of the motor (not shown in the figure) for collecting the temperature information of the motor. Further, the first analog-to-digital converter 20 is connected to the temperature sensor 10 and the monitoring controller respectively, for acquiring the temperature information, performing analog-to-digital conversion on the temperature information, obtaining the temperature information in the form of a digital signal, and sending the temperature information in the form of a digital signal to the monitoring controller.

[0040] Specifically, the first analog-to-digital converter 20 can be arranged at a position close to the temperature sensor 10 to obtain temperature information in the form of an analog signal and output the temperature information in the form of a digital signal. The temperature information in the form of a digital signal is remotely sent to the monitoring controller to prevent the complex electromagnetic environment during the transmission process from interfering with the signal of the temperature information, thereby improving the signal quality of the temperature information obtained by the monitoring controller.

[0041] Further, such as Figure 2b As shown, the vibration measuring device includes a vibration sensor 30 and a second analog-to-digital converter 40. Specifically, the vibration sensor 30 is disposed on the outer surface of the motor (not shown in the figure) to collect vibration information of the motor.

[0042] Furthermore, the second analog-to-digital converter 40 is respectively connected to the vibration sensor 30 and the monitoring controller, and is used to obtain the vibration information, perform analog-to-digital conversion on the vibration information, obtain the vibration information in the form of a digital signal, and send the vibration information in the form of a digital signal to the monitoring controller.

[0043] Specifically, the second analog-to-digital converter 40 can be arranged at a position close to the vibration sensor 30 to obtain vibration information in the form of an analog signal and output the vibration information in the form of a digital signal. The vibration information in the form of a digital signal is remotely sent to the monitoring controller to prevent the complex electromagnetic environment during the transmission process from interfering with the signal of the vibration information, thereby improving the signal quality of the vibration information obtained by the monitoring controller.

[0044] The embodiments provided in the present application can convert temperature information in the form of an analog signal output by a temperature sensor into temperature information in the form of a digital signal based on a first analog-to-digital converter, so as to reduce interference to the temperature information signal during transmission; and can convert vibration information in the form of an analog signal output by a vibration sensor into vibration information in the form of a digital signal based on a second analog-to-digital converter, so as to reduce interference to the vibration information signal during transmission, thereby improving the signal quality of the temperature information and vibration information received by the monitoring controller and improving the ability to measure the motor.

[0045] In an optional embodiment, if Figure 3 As shown, the monitoring controller includes a main controller and an information display; wherein, the main controller may have a storage unit or be connected to a storage unit to store data or programs; further, the main controller is respectively connected to each of the temperature measuring devices T and each of the vibration measuring devices V, for receiving the temperature information collected by each of the temperature measuring devices T and the vibration information collected by each of the vibration measuring devices V, and storing the temperature information and the vibration information; here, the main controller may adopt the Infineon XMC1300 microcontroller, which is a 32-bit microcontroller based on the ARM Cortex-M0 core, and has the characteristics of low price and rich external interfaces. Further, as Figure 4 As shown, the temperature measuring device T can be a DS18B20 digital temperature sensor, and the power port VDD, data port DQ and ground port GND of the DS18B20 digital temperature sensor can be connected to port 1, port 2 and port 3 of the P2 end of the XMC1300 single chip microcomputer respectively, and the power port VDD, data port DQ and ground port GND of the DS18B20 digital temperature sensor can be connected to port 3, port 2 and port 1 of the P1 end of the XMC1300 single chip microcomputer at the same time. Further, a pull-up resistor R can be connected between port 1 and port 2 of the P1 end of the XMC1300 single chip microcomputer to increase the level of the data port DQ output signal.

[0046] Further, such as Figure 3 As shown, the information display is connected to the main controller, and is used to receive the temperature information and the vibration information, and display the temperature information and the vibration information. Figure 5As shown, the core of the information display can be a display control chip, which can be a TM1638 display control chip. The TM1638 display control chip is a LED (light-emitting diode display) drive control dedicated circuit with a keyboard scan interface, which integrates MCU digital interface, data latch, LED high-voltage drive, keyboard scan and other circuits. Further, the display control chip can be connected to the main controller through 1 bidirectional IO port and 2 unidirectional IO ports to obtain information. Further, the information display also includes a first display screen and a second display screen composed of 8-segment digital tubes, respectively. The first display screen and the second display screen are connected to the display control chip for displaying temperature information and vibration information; further, the display control chip is also connected to the first keyboard button S1, the second keyboard button S2, the third keyboard button S3, the fourth keyboard button S4, the fifth keyboard button S5, the sixth keyboard button S6, the seventh keyboard button S7 and the eighth keyboard button S8. Relevant staff can also input information to the display control chip through the 8 keyboard buttons to control the display control chip and adjust the information displayed on the first display screen and the second display screen. The embodiment provided in the present application can collect temperature information and vibration information based on the main controller, and display the above information based on the information display, so that relevant personnel can intuitively determine the monitoring results of the motor and can control the content displayed on the information display, thereby improving the operability of the motor monitoring system.

[0047] In an optional embodiment, the main controller has a digital signal interaction terminal; here, the digital signal interaction terminal is used to output digital signals, which can be a digital IO interface on the main controller. Further, the digital signal interaction terminal is used to connect to a remote host computer to communicate between the main controller and the host computer based on digital signals. Here, the host computer can be a device that receives digital signals and analyzes and processes digital signals, such as a remote control terminal, a motor power regulator, and a motor controller. Here, the type of the host computer can be determined according to actual conditions and is also applicable to this embodiment. Specifically, the main controller can exchange data with the host computer through digital signals, send data to the host computer or receive data from the host computer, such as linkage control of devices such as the motor power regulator and the motor controller; further, the main controller can be connected to external contactors, relays, and other switch devices used to perform different functions through the digital signal interaction terminal to control the conduction and disconnection of the switch device to be linked with external devices. The embodiments provided in the present application can be connected to an external host computer through the digital signal interaction terminal of the main controller, realize the input and output of digital signals of the system, realize linkage with the host computer through digital signals, and improve the functional scalability of the motor monitoring system.

[0048] In an optional embodiment, the monitoring controller also includes a resistor-capacitance circuit (RC) filter circuit connected to the main controller, and the main controller also has a pulse width modulation signal interaction terminal, wherein the pulse width modulation signal interaction terminal is used to output a pulse width modulation signal of 0 to 5V, and the RC filter circuit is used to convert the pulse width modulation signal into an analog signal.

[0049] Specifically, the pulse width modulation signal interaction end is connected to the input end of the resistor-capacitor filter circuit, and is used to send a pulse width modulation signal to the resistor-capacitor filter circuit; further, the output end of the resistor-capacitor filter circuit is used to connect to an external device, and is used to convert the pulse width modulation signal into an analog signal, and send the analog signal to the external device, so as to establish a communication connection between the main controller and the external device. Here, the external device can be a device that receives analog signals and analyzes and processes analog signals, such as an alarm device, etc. Here, the type of external device can be determined according to actual conditions, and is also applicable to this embodiment. In the embodiment provided by the present application, the main controller is connected to the external device through a resistor-capacitor filter circuit, and the pulse width modulation signal is converted into an analog signal to communicate with the external device based on the analog signal, thereby realizing linkage with the external device through the analog signal, and improving the functional extensibility of the motor monitoring system.

[0050] Furthermore, the main controller can also use an external digital-to-analog converter to achieve analog output with more level options such as 0-24V or 0-10V to meet more peripheral requirements, and can also use a current conversion circuit to achieve 0-20mA or 4-20mA current output to meet more peripheral requirements.

[0051] The motor monitoring system provided by the present application can be externally provided with multiple temperature measuring devices and multiple vibration measuring devices on the motor to measure the temperature and vibration of the motor at multiple points simultaneously, and can display the measurement results in real time, and can provide analog and digital input and output interfaces for use by other control devices. Furthermore, a human-computer interaction interface is provided at the information display, so that relevant staff can view the monitoring results at the human-computer interaction interface and control the content displayed at the information display, thereby improving the operability of the motor monitoring system. The technical solution of the present application can perform multi-point temperature and vibration measurements on the motor and display the monitoring results in real time, eliminating the process of manual parameter measurement of the motor by the staff through a handheld measuring instrument, thereby significantly improving the efficiency of monitoring the motor, and can comprehensively monitor the temperature and vibration information at various parts of the motor, thereby improving the ability to monitor the motor.

[0052] Further, in one embodiment, if Figure 6 As shown, this embodiment provides a method for monitoring abnormal state of a motor, which is described by taking the method applied to a monitoring controller in the above-mentioned motor monitoring system as an example, and the method includes the following steps:

[0053] 601. Acquire temperature information collected by each of the temperature measuring devices and vibration information collected by each of the vibration measuring devices.

[0054] Among them, the vibration information and temperature information may be vibration information and temperature information after filtering and denoising; specifically, if there are 3 temperature measuring devices and 3 vibration measuring devices, the monitoring controller may obtain 3 temperature information respectively collected by the 3 temperature measuring devices and 3 vibration information respectively collected by the 3 vibration measuring devices.

[0055] 602. Determine the running state of the motor based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices, wherein the running state of the motor includes a normal state and an abnormal state.

[0056] Specifically, the monitoring controller can determine the highest temperature value among the multiple temperature information obtained, and the highest vibration value among the multiple vibration information obtained. Further, the highest temperature value is compared with a preset abnormal temperature threshold to determine whether the highest temperature value is higher than the abnormal temperature threshold. When the highest temperature value is higher than the abnormal temperature threshold, it is determined that the motor is in an abnormal temperature state. When the highest temperature value is not higher than the abnormal temperature threshold, it is determined that the motor is in a normal state. Here, the abnormal temperature threshold is used to calibrate whether the temperature of the motor is too high, and its value can be determined according to actual conditions.

[0057] Furthermore, the maximum vibration value is compared with a preset abnormal vibration threshold to determine whether the maximum vibration value is higher than the abnormal vibration threshold. When the maximum vibration value is higher than the abnormal vibration threshold, it is determined that the motor is in an abnormal vibration state. When the maximum vibration value is not higher than the abnormal vibration threshold, it is determined that the motor is in a normal state. Here, the abnormal vibration threshold is used to calibrate whether the vibration speed of the motor is too high, and its value can be determined according to actual conditions.

[0058] Furthermore, the control output end of the monitoring controller can be connected to the controlled end of an external alarm device to control the alarm device to issue an alarm prompt message; here, the alarm device can be set in a control room or an alarm center, etc., so as to issue an alarm message to relevant staff as soon as the motor becomes abnormal. Specifically, after determining that the motor is in an abnormal state, the monitoring controller can send an alarm output instruction to the alarm device, so that the alarm device issues the alarm prompt message, so that relevant staff can be informed of the abnormal condition of the motor in a timely manner.

[0059] The motor abnormal state monitoring method provided in this embodiment can collect temperature information and vibration information of multiple points on the motor. Compared with only collecting temperature information and vibration information of one point on the motor, it can comprehensively analyze the overall temperature and vibration conditions of the motor, monitor the operating state of the motor based on the overall condition of the motor, and more accurately identify abnormal conditions of the motor, thereby improving the monitoring capability of the motor.

[0060] In an optional embodiment, the method for determining the operating status of the motor based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices includes: first, comparing the temperature information collected by each of the temperature measuring devices with a preset temperature alarm threshold value to determine whether there is temperature information higher than the temperature alarm threshold value, and comparing the vibration information collected by each of the vibration measuring devices with a preset vibration alarm threshold value to determine whether there is vibration information higher than the vibration alarm threshold value; here, the temperature alarm threshold value is used to calibrate whether the temperature of the motor is abnormal, and the vibration alarm threshold value is used to calibrate whether the vibration of the motor is abnormal, and their values ​​can be determined according to actual conditions.

[0061] Then, if there is the temperature information higher than the temperature alarm threshold, or if there is the vibration information higher than the vibration alarm threshold, it is determined that the motor is in an abnormal state. Specifically, if there is temperature information collected by one or more temperature measuring devices higher than the temperature alarm threshold, or there is vibration information collected by one or more vibration measuring devices higher than the vibration alarm threshold, it is determined that the running state of the motor is an abnormal state; conversely, if the temperature information collected by each temperature measuring device is not higher than the temperature alarm threshold, and the vibration information collected by each vibration measuring device is not higher than the vibration alarm threshold, it is determined that the running state of the motor is a normal state. The embodiment provided by the present application can comprehensively judge whether the motor is in an abnormal state based on the temperature information and vibration information of multiple points on the motor, thereby improving the monitoring capability of the motor.

[0062] Furthermore, the control output end of the monitoring controller is connected to the controlled end of the motor, so as to control the motor to be in a running state or a stopped state; further, the monitoring controller is also used to perform the following steps: first, each of the temperature information is compared with a preset shutdown temperature threshold value, to determine whether there is any temperature information higher than the shutdown temperature threshold value, and each of the vibration information is compared with a preset shutdown vibration threshold value, to determine whether there is any vibration information higher than the shutdown vibration threshold value; wherein, the shutdown temperature threshold value is used to calibrate whether the temperature of the motor is too high. If the motor continues to run under conditions higher than the shutdown temperature threshold value, the motor may be damaged. Here, the shutdown temperature threshold value is higher than the temperature alarm threshold value, and its value can be determined according to actual conditions; further, the shutdown vibration threshold value is used to calibrate whether the vibration of the motor is too severe. If the motor continues to run under conditions where the vibration is too severe, the motor may be damaged. Here, the shutdown vibration threshold value is higher than the vibration alarm threshold value, and its value can be determined according to actual conditions.

[0063] Furthermore, if there is the temperature information higher than the shutdown temperature threshold, or the vibration information higher than the shutdown vibration threshold, the motor is controlled to be in a stopped state. In the above manner, it is possible to determine whether the motor is in a state of too high temperature or too severe vibration based on the temperature information and the vibration information, and when the motor is in a state of too high temperature or too severe vibration, the motor is promptly controlled to stop running to protect the motor.

[0064] In an optional embodiment, the method for determining the operating state of the motor based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices also includes: first, obtaining the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices at the current moment, and calculating the temperature information mean of all the temperature information and the vibration information mean of all the vibration information; as an example, if there are 3 temperature measuring devices and 3 vibration measuring devices, and the current moment is 15:00, the monitoring controller accumulates and averages the 3 temperature information collected by the 3 temperature measuring devices at 15:00 to obtain the temperature information mean, and accumulates and averages the 3 vibration information collected by the 3 vibration measuring devices at 15:00 to obtain the vibration information mean.

[0065] Furthermore, historical temperature information collected by each of the temperature measuring devices and historical vibration information collected by each of the vibration measuring devices at historical moments are obtained, and the historical temperature information mean of all of the historical temperature information and the historical vibration information mean of all of the historical vibration information are calculated.

[0066] The historical moment is a moment that is a preset time interval away from the current moment. Here, the preset time interval can be 10 seconds, 1 minute or other time intervals, and its specific value can be determined according to the actual situation. As an example, if the number of temperature measuring devices and vibration measuring devices is 3, the current moment is 15:00, and the preset time interval is 1 minute, then the 3 historical temperature information collected by the 3 temperature measuring devices at 14:59 and the 3 historical vibration information collected by the 3 vibration measuring devices at 14:59 can be obtained in the local storage unit; further, the 3 historical temperature information are accumulated and averaged to obtain the mean value of the historical temperature information, and the 3 historical vibration information are accumulated and averaged to obtain the mean value of the historical vibration information.

[0067] Finally, based on the temperature information mean, the vibration information mean, the historical temperature information mean and the historical vibration information mean, the operating state of the motor is determined. Specifically, it is possible to compare whether the difference between the historical temperature information mean and the temperature information mean is greater than a preset temperature difference threshold, and to compare whether the difference between the historical vibration information mean and the vibration information mean is greater than a preset vibration difference threshold. Among them, the temperature difference threshold is a preset reference value used to calibrate whether the increase in the temperature of the motor is normal in adjacent time periods, and the vibration difference threshold is a preset reference value used to calibrate whether the increase in the vibration speed of the motor is normal in adjacent time periods, and their values ​​can be determined according to actual conditions.

[0068] Further, if the difference between the historical temperature information mean and the temperature information mean is greater than the temperature difference threshold, or the difference between the historical vibration information mean and the vibration information mean is greater than the vibration difference threshold, it can be determined that the running state of the motor is abnormal. Relatively speaking, if the difference between the historical temperature information mean and the temperature information mean is not greater than the temperature difference threshold, and the difference between the historical vibration information mean and the vibration information mean is not greater than the vibration difference threshold, it can be determined that the running state of the motor is normal. The embodiment provided by the present application can determine whether the motor is in an abnormal state based on the changes in temperature and vibration at two moments, thereby improving the monitoring capability of the motor.

[0069] In an optional embodiment, the method for determining the operating state of the motor based on the temperature information mean, the vibration information mean, the historical temperature information mean and the historical vibration information mean can be: first, based on a preset vibration value deviation coefficient, the historical vibration information mean is corrected to obtain a historical vibration information correction value, and the difference between the vibration information mean and the historical vibration information correction value is calculated to obtain a vibration deviation value, wherein, based on the vibration value deviation coefficient, the method for correcting the historical vibration information mean can be to multiply the historical vibration information mean by the vibration value deviation coefficient. Specifically, the vibration deviation value can be calculated according to Formula 1:

[0070] Δ1(t)=f(t)-e1(t)f(t-1) (1)

[0071] Among them, Δ1(t) is the vibration deviation value, f(t) is the mean value of vibration information, f(t-1) is the mean value of historical vibration information, e1(t) is the preset vibration value deviation coefficient, e1(t)f(t-1) is the product of the vibration value deviation coefficient and the mean value of historical vibration information, that is, the historical vibration information correction value; among them, the vibration value deviation coefficient is used to correct the vibration deviation value, and its value can be determined according to actual conditions.

[0072] Further, based on a preset temperature value deviation coefficient, the historical temperature information mean is corrected to obtain a historical temperature information correction value, and the difference between the temperature information mean and the historical temperature information correction value is calculated to obtain a temperature deviation value, wherein, based on the temperature value deviation coefficient, the historical temperature information mean is corrected by multiplying the historical temperature information mean by the temperature value deviation coefficient. Specifically, the temperature deviation value can be calculated according to Formula 2:

[0073] Δ2(t)=T(t)-e2(t)T(t-1) (2)

[0074] Among them, Δ2(t) is the temperature deviation value, T(t) is the mean value of temperature information, T(t-1) is the mean value of historical temperature information, e2(t) is the preset temperature value deviation coefficient, and e2(t)T(t-1) is the product of the temperature value deviation coefficient and the mean value of historical temperature information, that is, the historical temperature information correction value. Among them, the temperature value deviation coefficient is used to correct the temperature deviation value, and its value can be determined according to actual conditions.

[0075] Further, a first product of the vibration deviation value and a preset vibration weight coefficient, and a second product of the temperature deviation value and a preset temperature weight coefficient are calculated, and the sum of the first product and the second product is calculated to obtain the motor comprehensive state quantity coefficient. Specifically, the motor comprehensive state quantity coefficient can be calculated based on Formula 3:

[0076]

[0077] Among them, B(t) is the motor comprehensive state coefficient, n is 2, g i is the weight coefficient. When i is 1, g1 is the vibration weight coefficient, Δ1(t) is the vibration deviation value. When i is 2, g2 is the temperature weight coefficient, Δ2(t) is the temperature deviation value.

[0078] Here, the values ​​of various preset parameters can be flexibly adjusted according to the past operating parameters of the motor and the specific conditions of the load carried by the motor, so that the motor comprehensive state coefficient can truly reflect the operating conditions of the motor. If the motor is installed on an elastic base, the vibration value may fluctuate greatly during normal operation. In this case, the vibration weight coefficient g1 can be appropriately reduced and the temperature weight coefficient g2 can be increased to adapt to the special working condition of the elastic base.

[0079] Further, it is determined whether the motor comprehensive state quantity coefficient is greater than a preset motor normal state threshold value. When the motor comprehensive state quantity coefficient is greater than the motor normal state threshold value, it is determined that the motor is in an abnormal state. The motor normal state threshold value can be obtained in advance through experiments or tests. Specifically, the motor comprehensive state quantity coefficient of the motor in a normal state can be determined, and the motor comprehensive state quantity coefficient in a normal state can be weighted to obtain the motor normal state threshold value. Specifically, the motor normal state threshold value can be determined by formula 4:

[0080] H=(1+A%)B(t), t=0 (4)

[0081] Wherein, H is the motor normal state threshold, B(t) is the motor comprehensive state coefficient under normal state, t is time, and A is the weighted value when calculating the motor normal state threshold, and its value can be 10. The weighted value can also be determined according to actual conditions. The embodiment provided by the present application can comprehensively analyze the temperature and vibration of the motor to determine the operating state of the motor, thereby improving the accuracy of identifying whether the motor is in an abnormal state.

[0082] In an optional embodiment, the control output end of the monitoring controller is connected to the controlled end of an external alarm device for controlling the alarm device to issue an alarm prompt message; after determining that the motor is in an abnormal state, the method further includes: sending an alarm output instruction to the alarm device so that the alarm device issues the alarm prompt message.

[0083] Furthermore, it is also possible to determine whether the motor comprehensive state quantity coefficient is greater than a preset abnormality threshold, where the abnormality threshold is greater than the motor normal state threshold. Specifically, the abnormality threshold can be determined by formula 5:

[0084] H=(1+B%)B(t), t=0 (5)

[0085] Among them, H is the abnormality threshold, B(t) is the motor comprehensive state quantity coefficient under normal conditions, t is time, and here, B is the weighted value when calculating the abnormality threshold, and its value can be 20. The weighted value can also be determined according to actual conditions.

[0086] Furthermore, after determining that the motor is in an abnormal state, the numerical relationship between the motor comprehensive state quantity coefficient and the abnormality threshold can be determined. When the motor comprehensive state quantity coefficient is less than or equal to the abnormality threshold, the alarm device can be controlled to issue an alarm prompt message of a first preset warning level. When the motor comprehensive state quantity coefficient is greater than the abnormality threshold, the alarm device can be controlled to issue an alarm prompt message of a second preset warning level. Here, the alarm prompt message is graded so that relevant staff can promptly understand the severity of the motor abnormality and handle the abnormal situation accordingly. The embodiment provided by the present application can promptly issue an alarm message when the motor is abnormal, so that relevant staff can understand the abnormal situation of the motor at the first time and handle the abnormal situation quickly.

[0087] The motor abnormal state monitoring method provided in this embodiment can collect temperature information and vibration information of multiple points on the motor, and analyze the temperature and vibration conditions of the motor to determine whether there is an abnormality in the motor, and issue an alarm message when the motor has an abnormality, thereby improving the ability of relevant personnel to respond to motor abnormalities, thereby significantly enhancing the abnormality monitoring capability and monitoring efficiency of the motor.

[0088] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A motor monitoring system for monitoring the temperature and vibration of a motor, characterized in that: The motor monitoring system includes a monitoring controller, a plurality of temperature measuring devices, and a plurality of vibration measuring devices; Each of the temperature measuring devices is disposed on the outer surface of the motor, and is used to collect temperature information of the motor, wherein each of the temperature measuring devices is disposed at a different position on the outer surface; Each of the vibration measuring devices is disposed on the outer surface of the motor to collect vibration information of the motor, wherein each of the vibration measuring devices is disposed at a different position on the outer surface; The monitoring controller is respectively connected to each of the temperature measuring devices and each of the vibration measuring devices; The monitoring controller is used to receive the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices, and display the temperature information and the vibration information.

2. The motor monitoring system according to claim 1, characterized in that: The temperature measurer includes a temperature sensor and a first analog-to-digital converter; The temperature sensor is arranged on the outer surface of the motor and is used to collect temperature information of the motor; The first analog-to-digital converter is connected to the temperature sensor and the monitoring controller respectively, and is used to obtain the temperature information, perform analog-to-digital conversion on the temperature information, obtain the temperature information in the form of a digital signal, and send the temperature information in the form of a digital signal to the monitoring controller; The vibration measuring device includes a vibration sensor and a second analog-to-digital converter; The vibration sensor is arranged on the outer surface of the motor and is used to collect vibration information of the motor; The second analog-to-digital converter is connected to the vibration sensor and the monitoring controller respectively, and is used to obtain the vibration information, perform analog-to-digital conversion on the vibration information, obtain the vibration information in the form of a digital signal, and send the vibration information in the form of a digital signal to the monitoring controller.

3. The motor monitoring system according to claim 1, characterized in that: The monitoring controller includes a main controller and an information display; The main controller is connected to each of the temperature measuring devices and each of the vibration measuring devices, respectively, and is used to receive the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices; The information display is connected to the main controller, and is used for receiving the temperature information and the vibration information, and displaying the temperature information and the vibration information.

4. The motor monitoring system according to claim 3, characterized in that: The main controller has a digital signal interaction terminal; The digital signal interaction terminal is used to connect to a remote host computer so as to communicate between the main controller and the host computer based on digital signals.

5. The motor monitoring system according to claim 4, characterized in that: The monitoring controller also includes a resistor-capacitor filter circuit; the main controller also has a pulse width modulation signal interaction terminal; The pulse width modulation signal interaction terminal is connected to the input terminal of the resistor-capacitor filter circuit, and is used to send a pulse width modulation signal to the resistor-capacitor filter circuit; The output end of the resistor-capacitor filter circuit is used to connect to an external device, to convert the pulse width modulation signal into an analog signal, and to send the analog signal to the external device, so as to establish a communication connection between the main controller and the external device.

6. A method for monitoring abnormal state of a motor, applied to a monitoring controller in a motor monitoring system as claimed in any one of claims 1 to 5, characterized in that: The method comprises: Acquiring the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices; Based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices, the operating state of the motor is determined.

7. The method according to claim 6, characterized in that The determining the operating state of the motor based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices comprises: Comparing the temperature information collected by each of the temperature measuring devices with a preset temperature alarm threshold value, to determine whether the temperature information is higher than the temperature alarm threshold value, and comparing the vibration information collected by each of the vibration measuring devices with a preset vibration alarm threshold value, to determine whether the vibration information is higher than the vibration alarm threshold value; If the temperature information is higher than the temperature alarm threshold, or if the vibration information is higher than the vibration alarm threshold, it is determined that the motor is in an abnormal state.

8. The method according to claim 6, characterized in that The determining the operating state of the motor based on the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices comprises: Acquire the temperature information collected by each of the temperature measuring devices and the vibration information collected by each of the vibration measuring devices at the current moment, and calculate the mean value of the temperature information of all the temperature information and the mean value of the vibration information of all the vibration information; Obtaining historical temperature information collected by each of the temperature measuring devices and historical vibration information collected by each of the vibration measuring devices at a historical moment, and calculating a mean value of the historical temperature information of all of the historical temperature information and a mean value of the historical vibration information of all of the historical vibration information, wherein the historical moment is a moment with a preset time interval from the current moment; Based on the temperature information mean, the vibration information mean, the historical temperature information mean, and the historical vibration information mean, the operating state of the motor is determined.

9. The method according to claim 8, characterized in that The determining the operating state of the motor based on the temperature information mean, the vibration information mean, the historical temperature information mean, and the historical vibration information mean includes: Based on a preset vibration value deviation coefficient, the mean value of the historical vibration information is corrected to obtain a historical vibration information correction value, and the difference between the mean value of the vibration information and the historical vibration information correction value is calculated to obtain a vibration deviation value; Based on a preset temperature value deviation coefficient, the historical temperature information mean is corrected to obtain a historical temperature information correction value, and the difference between the temperature information mean and the historical temperature information correction value is calculated to obtain a temperature deviation value; Calculating a first product of the vibration deviation value and a preset vibration weight coefficient, and a second product of the temperature deviation value and a preset temperature weight coefficient, and calculating the sum of the first product and the second product to obtain a motor comprehensive state quantity coefficient; Determine whether the motor comprehensive state quantity coefficient is greater than a preset motor normal state threshold, and when the motor comprehensive state quantity coefficient is greater than the motor normal state threshold, determine that the motor is in an abnormal state.

10. The method according to claim 9, characterized in that The control output end of the monitoring controller is connected to the controlled end of the external alarm device, so as to control the alarm device to issue an alarm prompt message; after determining that the motor is in an abnormal state, the method further includes: Send an alarm output instruction to the alarm device so that the alarm device issues the alarm prompt information.

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