Data acquisition system for fault diagnosis of coal mine large-scale equipment

Abstract

The utility model relates to the technical field of coal mine equipment monitoring, in particular to a data acquisition system for fault diagnosis of coal mine large-scale equipment, which comprises a plurality of monitoring units, a plurality of switches and a server. Each monitoring unit and the server are respectively connected with a switch; the switches are connected through optical cables to form an Ethernet ring network; each monitoring unit is arranged at a large-scale device, each monitoring unit comprises a monitoring substation, a camera and a plurality of vibration sensors, each vibration sensor is arranged at a key part of the large-scale device, and the vibration sensors comprise a wired vibration sensor and a wireless vibration sensor. The cameras are respectively connected with the monitoring substations in a wired or wireless mode, and the monitoring substations and the cameras are connected with the switch. According to the utility model, reliable acquisition and transmission of fault diagnosis data can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine equipment monitoring, in particular to a data acquisition system for fault diagnosis of large-scale coal mine equipment. Background Art

[0002] In coal mining, large equipment, such as main fans, belt conveyors, and elevators, are widely used. Such equipment has a complex structure and a relatively harsh working environment. The characteristics of coal production have high requirements for the continuous operation of major equipment. Therefore, in daily operation and maintenance management, it is necessary to ensure the long-term, high-reliability, and safe operation of large equipment. At present, the current status of operation and maintenance management of large equipment in coal mines is point inspection combined with corrective maintenance, regular disassembly and maintenance, and post-event repair. The limited means of monitoring the operating status of equipment, the effect of point inspections is affected by the experience and professionalism of the inspection personnel, the operating status of equipment depends on manual experience judgment, the long manual inspection cycle cannot monitor the operating status of equipment in a timely manner, and the failure to handle faults in a timely manner have all restricted the improvement of the management level of large equipment in enterprises. From a macro perspective, the operation and maintenance strategy that relies on manual and experience is already difficult to support the requirements of refined management of enterprises in the current era of advocating transformation to digitalization and intelligence. Utility Model Content

[0003] The utility model overcomes the deficiencies of the prior art and aims to solve the technical problem of providing a data acquisition system for fault diagnosis of large-scale coal mine equipment to realize online data detection of coal mine equipment and provide data basis for background centralized fault diagnosis.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a data acquisition system for fault diagnosis of large-scale equipment in coal mines, including multiple monitoring units, multiple switches and servers; each of the monitoring units and servers is connected to a switch respectively; each of the switches is connected through an optical cable to form an Ethernet ring network;

[0005] Each of the monitoring units is respectively arranged at a large-scale equipment. The monitoring unit includes a monitoring substation, a camera and a plurality of vibration sensors. Each vibration sensor is respectively arranged at a key position of the large-scale equipment. The vibration sensor includes a wired vibration sensor and a wireless vibration sensor, which are respectively connected to the monitoring substation by wire or wireless means. The monitoring substation and the camera are connected to the switch.

[0006] When the large equipment is a ventilator, the corresponding monitoring unit includes 8 vibration sensors, one of which is horizontally arranged at the bearing seat of the non-drive end of the motor, three are horizontally, vertically and axially arranged at the drive end of the motor, two are horizontally and vertically arranged at the bearing seat of the fan duct, and two are horizontally and vertically arranged at the fan duct blades.

[0007] The monitoring substation includes: a backplane and a power module, a main control module, a communication module, a wired input module, and a wireless input module arranged on the backplane; the power module is used to supply power to the monitoring substation after voltage conversion; the wired input module and the communication module are respectively connected to the main control module through an SPI interface, and the wireless input module is connected to the main control module through a UART interface; the main control module is respectively connected to a wired vibration sensor and a wireless vibration sensor through the wired input module and the wireless input module, and the main control module is connected to a switch through a communication module.

[0008] The backplane is also provided with a power interface, a first data interface and a second data interface. The power module is connected to an external power source via the power interface, the wired input module is connected to a wired sensor via the first data interface, and the communication module is connected to a switch via the second data interface.

[0009] The vibration sensor includes a temperature sensor, an amplifying circuit, a power supply unit, a single-chip microcomputer, a three-axis acceleration sensor, and a communication unit; the output end of the temperature sensor is connected to the single-chip microcomputer after passing through the amplifying circuit, the output end of the three-axis acceleration sensor is connected to the single-chip microcomputer, the power supply unit is used for power supply, and the single-chip microcomputer is connected to the monitoring substation via the communication unit.

[0010] The power supply unit includes a battery and a voltage conversion unit. The voltage output by the battery is converted by the voltage conversion unit to supply power to the amplifier circuit and the single-chip microcomputer.

[0011] The communication unit is a wireless communication unit or a wired communication unit.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a data acquisition system for fault diagnosis of large equipment in coal mines. Monitoring units are set up with each large equipment in the coal mine as a unit. Each monitoring unit is responsible for one large equipment. Each monitoring unit includes multiple vibration sensors and a monitoring substation arranged at key positions of the large equipment. The vibration sensors are arranged in a wired or wireless manner according to the on-site environment. The monitoring substation is used to collect sensor data from the large equipment and connects to a server and a host computer through a switch to store and display the data. At the same time, the data is also uploaded to the cloud to provide diagnostic data for fault diagnosis in the cloud. Therefore, the utility model can realize reliable collection and transmission of fault diagnosis data. In addition, the data in the present application can be stored in three nodes: the monitoring substation, the server and the cloud, thereby improving the reliability of data storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A schematic diagram of the structure of a data acquisition system for large-scale equipment fault diagnosis in coal mines provided by an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation of a vibration sensor on a ventilator in an embodiment of the utility model; 1 is a motor, 2 is a fan duct bearing seat, 3 is a fan duct blade, and 4 is a vibration sensor;

[0016] Figure 3 This is a circuit structure block diagram of a monitoring substation in an embodiment of the utility model;

[0017] Figure 4 This is a circuit schematic diagram of a main control module of a monitoring substation in an embodiment of the utility model;

[0018] Figure 5 This is a circuit schematic diagram of a power module of a monitoring substation in an embodiment of the utility model;

[0019] Figure 6 This is a circuit schematic diagram of a wired input module of a monitoring substation in an embodiment of the utility model;

[0020] Figure 7 The figure is a circuit structure block diagram of the vibration sensor in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] like Figure 1 As shown, an embodiment of the utility model provides a data acquisition system for fault diagnosis of large equipment in coal mines, including multiple monitoring units, multiple switches and servers; each of the monitoring units and servers is connected to a switch respectively; each of the switches is connected by an optical cable to form an Ethernet ring network.

[0023] Each of the monitoring units is respectively arranged at a large-scale equipment. The monitoring unit includes a monitoring substation, a camera and multiple vibration sensors. Each vibration sensor is respectively arranged at a key position of the large-scale equipment. The vibration sensor includes a wired vibration sensor and a wireless vibration sensor, which are respectively connected to the monitoring substation by wire or wireless means. The monitoring substation and the camera are connected to the corresponding switch.

[0024] Specifically, the camera may be a pan-tilt camera, which is used to collect image information at key positions of large equipment to assist in fault diagnosis.

[0025] like Figure 2 As shown, in this embodiment, when the large equipment is a ventilator, the corresponding monitoring unit includes 8 vibration sensors, one of which is horizontally arranged at the bearing seat of the non-driving end of the motor, three are horizontally, vertically and axially arranged at the clicking driving end, two are horizontally and vertically arranged at the bearing seat of the fan duct, and two are horizontally and vertically arranged at the fan duct blades.

[0026] Furthermore, if Figure 3 As shown, in this embodiment, the monitoring substation includes: a backplane and a power module, a main control module, a communication module, a wired input module, and a wireless input module arranged on the backplane; the power module is used to supply power to the monitoring substation after voltage conversion; the wired input module and the communication module are respectively connected to the main control module through an SPI interface, and the wireless input module is connected to the main control module through a UART interface; the main control module is respectively connected to a wired vibration sensor and a wireless vibration sensor through the wired input module and the wireless input module, and the main control module is connected to a switch through a communication module.

[0027] Furthermore, if Figure 3 As shown, the backplane is also provided with a power interface, a first data interface and a second data interface. The power module is connected to an external power source through the power interface, the wired input module is connected to a wired sensor through the first data interface, and the communication module is connected to a switch through the second data interface.

[0028] Specifically, in this embodiment, the second data interface is an RJ45 network port, and the communication module is connected to the switch of the transmission layer through the RJ45 network port to realize data upload. The wireless input module adopts a wireless wifi module. Among them, the power interface is responsible for collecting external DC power, usually a 12V DC input; the power module is used to convert the 12V DC voltage introduced by the power interface into 3.3V, and the communication module, the main control module, the wired input module, and the wireless input module are powered through the power interfaces of each module; the first data interface receives the vibration and temperature data transmitted by the wired sensor through a 4-20ma signal, and the second data interface realizes Ethernet data transmission between the monitoring substation and the switch through the RJ45 network port, that is, the data collected by the monitoring substation is transmitted to the switch through Ethernet, and then transmitted to the server; the communication module is used to realize Ethernet transmission of data, and data is transmitted with the main control module through the SPI interface; the main control module is used to process the collected vibration and temperature data; the wired input module is used to convert the collected vibration and temperature data into AD and then access the main control chip through the SPI interface; the wireless input module is used to collect data from wireless sensors through wifi.

[0029] Furthermore, in this embodiment, the backplane is also provided with a plurality of chip plug-in interfaces and corresponding peripheral circuits, and the main chips of the main control module, communication module, wired input module and wireless input module are all arranged on the backplane through the chip plug-in interfaces.

[0030] Specifically, in this embodiment, Figures 4-5 As shown in the figure, they are the circuit schematics of the power module and the main control module. The power module uses the VRB1203 chip, and the main control chip uses the STM32F207 microprocessor. Figure 6 As shown, it is the interface circuit principle diagram of the wired input module; in this embodiment, the communication module adopts the W5500 chip, the wired input module adopts the ADS7828 chip and the AD824 chip, and the wireless input module adopts the EMW3162 chip.

[0031] Furthermore, if Figure 7 As shown, the vibration sensor includes a temperature sensor, an amplifying circuit, a power supply unit, a single-chip microcomputer, a three-axis acceleration sensor, and a communication unit; the output end of the temperature sensor is connected to the single-chip microcomputer after passing through the amplifying circuit, the output end of the three-axis acceleration sensor is connected to the single-chip microcomputer, the power supply unit is used for power supply, and the single-chip microcomputer is connected to the monitoring substation through the communication unit. The circuit of the vibration sensor is an intrinsically safe circuit.

[0032] Furthermore, if Figure 7As shown, the power supply unit includes a battery and a voltage conversion unit. The battery adopts Li-SOCl2 lithium primary battery, model: LS14500, capacity: 2600mAh, voltage 3.6V. The battery open circuit voltage is ≤3.7V; the battery outputs a voltage of 3.6V, which is converted by the voltage conversion unit to supply 3.3V DC to the amplifier circuit and the single-chip microcomputer. The communication unit is a wireless communication unit or a wired communication unit. The temperature sensor uses PT100 as a probe, and its output resistance changes with temperature. The probe, sampling resistor and potentiometer form a detection bridge, and the potentiometer is used to adjust the balance of the bridge. The output signal of the bridge is amplified by the amplifier circuit formed by the DC in-phase amplifier and then sent to the single-chip microcomputer. The three-axis acceleration sensor model is ADXL345. The vibration signal is measured by ADXL345. The acceleration in the three directions of X, Y and Z axes can be detected and sent to the single-chip microcomputer. After the final operation and processing, it is output to the monitoring substation through the communication unit.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A data acquisition system for fault diagnosis of large equipment in coal mines, characterized in that: It includes a plurality of monitoring units, a plurality of switches and servers; each of the monitoring units and the server is connected to a switch respectively; each of the switches is connected via an optical cable to form an Ethernet ring network; Each of the monitoring units is respectively arranged at a large-scale equipment. The monitoring unit includes a monitoring substation, a camera and a plurality of vibration sensors. Each vibration sensor is respectively arranged at a key position of the large-scale equipment. The vibration sensor includes a wired vibration sensor and a wireless vibration sensor, which are respectively connected to the monitoring substation by wire or wireless means. The monitoring substation and the camera are connected to the switch.

2. A data acquisition system for fault diagnosis of large equipment in coal mines according to claim 1, characterized in that: When the large equipment is a ventilator, the corresponding monitoring unit includes 8 vibration sensors, one of which is horizontally arranged at the bearing seat of the non-drive end of the motor, three are horizontally, vertically and axially arranged at the drive end of the motor, two are horizontally and vertically arranged at the bearing seat of the fan duct, and two are horizontally and vertically arranged at the fan duct blades.

3. A data acquisition system for fault diagnosis of large equipment in coal mines according to claim 1, characterized in that: The monitoring substation includes: a backplane and a power module, a main control module, a communication module, a wired input module, and a wireless input module arranged on the backplane; the power module is used to supply power to the monitoring substation after voltage conversion; the wired input module and the communication module are respectively connected to the main control module through an SPI interface, and the wireless input module is connected to the main control module through a UART interface; the main control module is respectively connected to a wired vibration sensor and a wireless vibration sensor through the wired input module and the wireless input module, and the main control module is connected to a switch through a communication module.

4. A data acquisition system for fault diagnosis of large equipment in coal mines according to claim 3, characterized in that: The backplane is also provided with a power interface, a first data interface and a second data interface. The power module is connected to an external power source via the power interface, the wired input module is connected to a wired sensor via the first data interface, and the communication module is connected to a switch via the second data interface.

5. A data acquisition system for fault diagnosis of large equipment in coal mines according to claim 1, characterized in that: The vibration sensor includes a temperature sensor, an amplifying circuit, a power supply unit, a single-chip microcomputer, a three-axis acceleration sensor, and a communication unit; the output end of the temperature sensor is connected to the single-chip microcomputer after passing through the amplifying circuit, the output end of the three-axis acceleration sensor is connected to the single-chip microcomputer, the power supply unit is used for power supply, and the single-chip microcomputer is connected to the monitoring substation via the communication unit.

6. A data acquisition system for fault diagnosis of large equipment in coal mines according to claim 5, characterized in that: The power supply unit includes a battery and a voltage conversion unit. The voltage output by the battery is converted by the voltage conversion unit to supply power to the amplifier circuit and the single-chip microcomputer.

7. A data acquisition system for fault diagnosis of large equipment in coal mines according to claim 5, characterized in that: The communication unit is a wireless communication unit or a wired communication unit.

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