Mechanical motor vibration monitoring system based on wireless communication

Abstract

The utility model discloses a mechanical motor vibration monitoring system based on wireless communication, which comprises sensor nodes, a wireless gateway and a background monitoring system, each sensor node comprises a signal acquisition circuit, a data processing circuit, a first 2.4 G wireless unit and a first power supply management circuit, the wireless gateway comprises a second 2.4 G wireless unit, a central processing circuit, a 5G wireless unit and a second power supply management circuit which are connected in sequence, the first 2.4 G wireless unit and the second 2.4 G wireless unit in each sensor node realize data interaction through a 2.4 G wireless network, and the 5G wireless unit and the background monitoring system realize data interaction through a 5G wireless network. The device is installed in a mechanical motor monitoring occasion with multiple measuring points, can avoid complex wiring of wired transmission, and is suitable for on-site vibration monitoring of the mechanical motor.

Description

Technical field:

[0001] The utility model relates to a mechanical motor vibration monitoring system based on wireless communication, which can be applied to the measurement and monitoring of mechanical motor vibration. Background technology:

[0002] Mechanical motors are important electrical equipment in modern industrial production, so the operation of mechanical motors is crucial to industrial production. Mechanical motors are generally accompanied by varying degrees of vibration during operation. The vibration of mechanical motors contains information about the operation of the equipment. Studies have shown that by analyzing the vibration signal in the time domain or frequency domain, potential faults in the operation of mechanical motors can be discovered to avoid industrial accidents. In addition, from the perspective of equipment maintenance, through the diagnosis of vibration information, targeted maintenance can be performed on the equipment regularly to increase the service life of mechanical motor equipment.

[0003] The main causes of mechanical motor vibration are bearing wear, shaft bending deformation, axis tilt or armature imbalance. Generally speaking, the vibration signal of a mechanical motor can be decomposed into three basic parameters, namely amplitude, frequency, and phase. The amplitude can be analyzed using physical quantities such as displacement, velocity, and acceleration. In industrial sites, low-frequency vibration or low-speed equipment can be monitored by displacement, and high-frequency vibration or high-frequency equipment can be monitored by acceleration. If an overall analysis of vibration is performed, speed is required as a reference. This requires the deployment of a large number of different instruments and sensors on site, which is not only difficult to wire, but also inconvenient for later maintenance and management. This requires a simple and easy wireless transmission monitoring system suitable for industrial sites. Utility model content:

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and seek to design a mechanical motor vibration monitoring system based on wireless communication, which solves the problems of complicated wiring and difficult maintenance and management of existing electrical equipment.

[0005] In order to achieve the above-mentioned purpose, the utility model relates to a mechanical motor vibration monitoring system based on wireless communication, including a sensor node, a wireless gateway and a background monitoring system, wherein a plurality of sensor nodes are provided, each sensor node includes a signal acquisition circuit, a data processing circuit, a first 2.4G wireless unit and a first power management circuit, the signal acquisition circuit, the data processing circuit, and the first 2.4G wireless unit are connected in sequence, the first power management circuit is respectively connected to the signal acquisition circuit, the data processing circuit and the first 2.4G wireless unit, correspondingly, the wireless gateway includes a second 2.4G wireless unit, a central processing circuit, a 5G wireless unit and a second power management circuit, the second power management circuit is respectively connected to the second 2.4G wireless unit, the second data processing circuit and the 5G wireless unit, the second 2.4G wireless unit, the central processing circuit and the 5G wireless unit are connected in sequence, the first 2.4G wireless unit in each sensor node and the second 2.4G wireless unit realize data interaction through the 2.4G wireless network, and the 5G wireless unit and the background monitoring system realize data interaction through the 5G wireless network.

[0006] It should be noted that the sensor node is set on the mechanical motor to perform on-site vibration monitoring thereon.

[0007] It should be noted that the sensor node 1 includes a velocity sensor node, a displacement sensor node and an acceleration sensor node.

[0008] It should be noted that the first power management circuit and the second power management circuit both include at least one of an AC / DC circuit and a battery management circuit. The AC / DC circuit is externally connected to alternating current, and the battery management circuit is externally connected to a lithium battery.

[0009] Compared with the prior art, the utility model has the following beneficial effects: (1) For mechanical motor monitoring occasions where a large number of measuring points need to be installed, the complex wiring of wired transmission can be avoided, and it is suitable for on-site vibration monitoring of mechanical motors such as turbines, compressors, motors, pumps, fans, blowers, centrifuges and generator motors; (2) By using industrial large model data as the basis for fault diagnosis, the background monitoring system can analyze the potential fault points of mechanical motor equipment according to the real-time data of sensor nodes, which is convenient for early maintenance. Description of the drawings:

[0010] Figure 1 It is a schematic diagram of the structure of the mechanical motor vibration monitoring system based on wireless communication involved in Example 1.

[0011] Figure 2 It is a schematic diagram of the sensor node structure involved in Example 1.

[0012] Figure 3 It is a schematic diagram of the structure of the wireless gateway involved in Example 1. Specific implementation method:

[0013] The utility model is further described below by way of embodiments.

[0014] Embodiment 1:

[0015] like Figure 1 As shown, the present embodiment involves a mechanical motor vibration monitoring system based on wireless communication, including a sensor node 1, a wireless gateway 2 and a background monitoring system 3, wherein a plurality of sensor nodes 1 are provided as needed, each sensor node 1 includes a signal acquisition circuit 101, a data processing circuit 102, a first 2.4G wireless unit 103 and a first power management circuit 104, the signal acquisition circuit 101, the data processing circuit 102, and the first 2.4G wireless unit 103 are connected in sequence, the first power management circuit 104 is respectively connected to the signal acquisition circuit 101, the data processing circuit 102 and the first 2.4G wireless unit 103, and correspondingly, the wireless gateway 2 includes It includes a second 2.4G wireless unit 201, a central processing circuit 202, a 5G wireless unit 203 and a second power management circuit 204. The second power management circuit 204 is connected to the second 2.4G wireless unit 201, the second data processing circuit 202 and the 5G wireless unit 203 respectively. The second 2.4G wireless unit 201, the central processing circuit 202 and the 5G wireless unit 203 are connected in sequence. The first 2.4G wireless unit 103 in each sensor node 1 and the second 2.4G wireless unit 201 realize data interaction through 2.4G wireless communication, and the 5G wireless unit 203 and the background monitoring system 3 realize data interaction through 5G wireless communication.

[0016] It should be noted that sensor nodes are set on mechanical motors such as steam turbines, compressors, motors, pumps, fans, blowers, centrifuges and generators for on-site vibration monitoring. Sensor nodes can communicate with wireless gateways in ad hoc networking mode or in star networking mode one-to-one.

[0017] It should be noted that the sensor node 1 includes but is not limited to a speed sensor node, a displacement sensor node and an acceleration sensor node, which are respectively used to collect the speed, displacement and acceleration signals of the mechanical motor. At least one of the speed sensor node, the displacement sensor node and the acceleration sensor node can be set on each mechanical motor. Different sensor nodes on the same mechanical motor, and sensor nodes on different mechanical motors all realize data interaction through 2.4G wireless communication with the first 2.4G wireless unit 103 configured by themselves and the second 2.4G wireless unit 201, avoiding wiring at the equipment site. Therefore, the sensor node 1 includes a first sensor node, a second sensor node, a third sensor node... and an nth sensor node, where n is a positive integer greater than or equal to 1.

[0018] It should be noted that the first power management circuit 104 and the second power management circuit 204 both include at least one of an AC / DC circuit and a battery management circuit. The AC / DC circuit is externally connected to an alternating current, and the battery management circuit is externally connected to a lithium battery. Both AC power supply and lithium battery power supply can be used. The first power management circuit 104 and the second power management circuit 204 preferably use a battery management circuit, which is powered by a lithium battery, is easy to use, and can also greatly reduce the measurement noise caused by the AC power supply.

[0019] It should be noted that the signal acquisition circuit 101 is used to collect the analog vibration signal of the corresponding mechanical motor, and convert the analog vibration signal into a digital quantity and forward it to the data processing circuit 102; the data processing circuit 102 is used to filter and reduce noise on the vibration signal and then forward it to the first 2.4G wireless unit 103; the first 2.4G wireless unit 103 is used to transmit data to the second 2.4G wireless unit 201 of the wireless gateway 2;

[0020] The second 2.4G wireless unit 201 is used to receive data from the sensor node 1. The central processing circuit 202 verifies the received data and packages it for upload, and sends it to the background monitoring system 3 through the 5G wireless unit 203. At the same time, based on the control of the background monitoring system 3, the parameter configuration of each sensor node is sent to the second 2.4G wireless unit 201.

[0021] The background monitoring system 3 is used to receive the data of each sensor node 1 uploaded by the wireless gateway 2, and perform data analysis, storage, alarm record query, fault analysis and other processing.

[0022] 2.4GHz wireless technology is a short-range wireless transmission technology. 2.4GHz refers to a working frequency band. 2.4GHz ISM (Industry Science Medicine) is a publicly and generally used wireless frequency band. Bluetooth, Zigbe and WiFi all belong to 2.4GHz wireless technology. Working in the 2.4GHz frequency band can obtain a larger range of use and stronger anti-interference ability, and is widely used in home and commercial fields.

Claims

1. A mechanical motor vibration monitoring system based on wireless communication, characterized in that: It includes sensor nodes, wireless gateways and a background monitoring system, wherein a plurality of sensor nodes are provided, each sensor node includes a signal acquisition circuit, a data processing circuit, a first 2.4G wireless unit and a first power management circuit, the signal acquisition circuit, the data processing circuit and the first 2.4G wireless unit are connected in sequence, the first power management circuit is respectively connected to the signal acquisition circuit, the data processing circuit and the first 2.4G wireless unit, correspondingly, the wireless gateway includes a second 2.4G wireless unit, a central processing circuit, a 5G wireless unit and a second power management circuit, the second power management circuit is respectively connected to the second 2.4G wireless unit, the second data processing circuit and the 5G wireless unit, the second 2.4G wireless unit, the central processing circuit and the 5G wireless unit are connected in sequence, the first 2.4G wireless unit in each sensor node and the second 2.4G wireless unit realize data interaction through a 2.4G wireless network, and the 5G wireless unit and the background monitoring system realize data interaction through a 5G wireless network.

2. The mechanical motor vibration monitoring system based on wireless communication according to claim 1, characterized in that: The sensor nodes are set on the mechanical motors to monitor their vibration on site.

3. The mechanical motor vibration monitoring system based on wireless communication according to claim 1, characterized in that: The sensor nodes include velocity sensor nodes, displacement sensor nodes and acceleration sensor nodes.

4. The mechanical motor vibration monitoring system based on wireless communication according to claim 1, characterized in that: The first power management circuit and the second power management circuit each include at least one of an AC / DC circuit and a battery management circuit. The AC / DC circuit is externally connected to alternating current, and the battery management circuit is externally connected to a lithium battery.

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