A device and method for monitoring abnormal sounds of a belt conveyor

Abstract

This invention proposes a device and method for monitoring abnormal sounds of a belt conveyor, relating to the field of signal processing. The device includes a fiber optic mounting base, an optical fiber for sound measurement, an optical fiber sound measurement substation, and a monitoring host. The fiber optic mounting base is installed longitudinally along the belt conveyor to collect sound signals from the belt conveyor in segments and transmit them to the optical fiber for sound measurement between the mounting bases. The optical fiber sound measurement substation, connected to the optical fiber, processes the segmented sound signals on the optical fiber and transmits them to the monitoring host. The monitoring host, connected to the optical fiber sound measurement substation, automatically extracts the acoustic characteristics of the segmented sound signals and, based on these characteristics, performs segmented real-time monitoring of the belt conveyor's operating status. This invention collects abnormal sounds from the belt conveyor in segments using a fiber optic mounting base installed on one side of the belt conveyor, then uploads the data to the monitoring host via the optical fiber for analysis by monitoring software. Once an abnormality occurs, the monitoring platform will issue a real-time alarm indicating the location and type of the fault.

Description

Technical Field

[0001] This invention belongs to the field of signal processing, and in particular relates to a device and method for monitoring abnormal sounds of belt conveyors. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] A belt conveyor is short for a belt conveyor. Belt conveyors use the friction between the drive roller and the belt to pull the conveyor belt and materials. They use the continuous or intermittent movement of the conveyor belt to transport various items of different weights. They can transport various bulk materials as well as various cartons, packaging bags and other single items with small weights. They can also be used in assembly lines for certain processes. They are especially important transportation tools in mining and have a wide range of applications.

[0004] However, belt conveyors may experience various abnormal conditions during operation, such as loose support bolts, belt slippage, belt misalignment, damaged roller or idler bearings, or unclean roller or idler surfaces. These issues can easily lead to belt conveyor damage, shutdown, or even fire.

[0005] Currently, the automation level of belt conveyor idler roller fault detection in China is low, mainly relying on manual inspections. Faults are determined by observation and sound listening. When there are a large number of belt conveyors or their length is long, regular manual inspections are extremely labor-intensive and cannot provide real-time monitoring of the conveyor's operation. Existing automated monitoring methods each have their shortcomings and cannot be widely adopted. For example, smoke detectors, infrared sensors, and video surveillance cannot cover the entire belt length; vibration sensors or microphones require a large number of sensors, resulting in high costs, complex installation, and power supply difficulties; existing fiber optic vibration sensing technology lacks accuracy, requires multiple optical fibers, cannot accurately distinguish fault types, and has insufficient fault location accuracy.

[0006] To address the above issues, there is an urgent need for a belt conveyor anomaly monitoring device that achieves low system cost, convenient construction and installation, high reliability, accurate identification of fault types, and accurate fault location. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention provides a belt conveyor abnormal sound monitoring device and method. Abnormal sounds of the belt conveyor are collected in segments by a fiber optic mounting bracket installed on one side of the belt conveyor, and then uploaded to the monitoring host via an optical fiber for analysis by the monitoring software. Once an abnormality occurs, the monitoring platform will issue a real-time alarm with the location and type of the fault.

[0008] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0009] The first aspect of this invention provides a belt conveyor abnormal sound monitoring device;

[0010] A belt conveyor abnormal sound monitoring device includes a fiber optic mounting base, an optical fiber for sound measurement, an optical fiber sound measurement substation, and a monitoring host.

[0011] The fiber optic mounting base is installed longitudinally along the belt conveyor to collect sound signals during belt conveyor operation in sections and transmit them to the acoustic optical fibers between the fiber optic mounting bases.

[0012] The fiber optic acoustic measurement substation is connected to the acoustic measurement fiber and is used to process the segmented sound signals on the acoustic measurement fiber and transmit them to the monitoring host.

[0013] The monitoring host is connected to the fiber optic acoustic measurement substation and is used to automatically extract the acoustic features of segmented sound signals. Based on the acoustic features, the operating status of the belt conveyor is monitored in real time in segments.

[0014] Furthermore, the fiber coil fixing seat is installed longitudinally along the belt conveyor, specifically: the fiber coil fixing seat is installed on one side of the belt conveyor bracket by means of magnets or fixing screws, and the distance between two adjacent fiber coil fixing seats is the same.

[0015] Furthermore, the segmented collection of sound signals during the operation of the belt conveyor specifically includes:

[0016] By tightly connecting with the belt conveyor support, the system collects the sounds generated by the vibration of the belt conveyor support, the friction between the belt and the roller or idler, the friction between the belt and the belt conveyor support, the bearing friction generated by the rotation of the roller or idler, and other mechanical vibrations or friction.

[0017] Furthermore, the acoustic optical fiber is divided into section A and section B.

[0018] The B-segment acoustic fiber is wound around the fiber optic coil holder and is used to conduct optical signals and collect sound signals.

[0019] The A-segment acoustic fiber is laid longitudinally along the conveyor belt and is used to transmit optical signals and separate the two adjacent B-segment acoustic fibers.

[0020] Furthermore, the processing of the segmented sound signals on the acoustic fiber specifically involves:

[0021] The fiber optic acoustic measurement substation sends a pulsed light source to the acoustic measurement fiber and receives the acousto-optic modulated signal reflected by the acoustic measurement fiber.

[0022] The fiber optic acoustic measurement substation uses phase-sensitive optical time-domain reflectometer phase simulation coherent demodulation technology to demodulate the acoustic signal of each B-segment acoustic measurement fiber.

[0023] Furthermore, the monitoring host is connected to the fiber optic acoustic measurement substation via Ethernet, receives various audio signals uploaded by the fiber optic acoustic measurement substation, and analyzes them using monitoring software.

[0024] Furthermore, the segmented real-time monitoring of the belt conveyor's operating status specifically includes:

[0025] The monitoring software automatically extracts acoustic features from the received segmented sound signals and compares them with various operating condition voiceprint databases to obtain the location and type of the fault.

[0026] The second aspect of the present invention provides a method for monitoring abnormal sounds of a belt conveyor.

[0027] A method for monitoring abnormal sounds of a belt conveyor based on the belt conveyor abnormal sound monitoring device according to the first aspect of the present invention includes:

[0028] Segmented acquisition of sound signals from the belt conveyor;

[0029] The acoustic features of segmented sound signals are automatically extracted, and the operating status of the belt conveyor is monitored in real time in segments based on these acoustic features.

[0030] A third aspect of the present invention provides a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps of a belt conveyor abnormal sound monitoring method as described in the second aspect of the present invention.

[0031] The fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of a belt conveyor abnormal sound monitoring method as described in the second aspect of the present invention.

[0032] The above one or more technical solutions have the following beneficial effects:

[0033] In this invention, the monitoring host is connected to the fiber optic acoustic measurement substation via Ethernet, receives various sound signals uploaded by the fiber optic acoustic measurement substation, and analyzes them by the monitoring software; once an anomaly occurs, the monitoring platform will issue a real-time alarm on the location and type of the fault.

[0034] It can also achieve low system cost, convenient construction and installation, high reliability, accurate identification of fault types, and accurate location of fault points.

[0035] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0037] Figure 1 This is a structural diagram of the device according to the first embodiment.

[0038] Figure 2 This is a flowchart of the method in the second embodiment.

[0039] The components include: 1. Belt conveyor; 2. Fiber optic cable holder; 3. Belt conveyor bracket; 4. Section A acoustic fiber optic cable; 5. Section B acoustic fiber optic cable; 6. Fiber optic acoustic substation; and 7. Monitoring host. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] This embodiment discloses a device for monitoring abnormal sounds of a belt conveyor, such as... Figure 1 As shown, it includes a belt conveyor 1, a fiber optic cable holder 2, a belt conveyor bracket 3, an A-section acoustic fiber optic cable 4, a B-section acoustic fiber optic cable 5, an optical fiber acoustic substation 6, and a monitoring host 7.

[0043] The fiber optic mounting base 2 is installed longitudinally along the belt conveyor 1, with approximately 1 meter between every two mounting bases. The fiber optic mounting base 2 is installed on one side of the belt conveyor support 3 by magnets or fixing screws. Its function is to collect the sound generated by the vibration of the belt conveyor support 3, the sound generated by the friction between the belt and the roller or idler, the sound generated by the friction between the belt and the support, the sound generated by the bearing friction generated by the rotation of the roller or idler, and other mechanical vibrations or frictions through a tight connection with the belt conveyor support 3, and transmit the sound to the B-segment acoustic fiber 5 wound on it. The fiber optic mounting base 2 transmits the sound to the B-segment acoustic fiber 5 wound on it, and the fiber optic cable is the final instrument for sound-to-light conversion. To improve the accuracy of sound acquisition, a sufficient length of fiber optic cable is required at the same location, hence the need for the fiber optic mounting base 2.

[0044] The acoustic fiber is divided into section A acoustic fiber 4 and section B acoustic fiber 5. Section A acoustic fiber 4 is laid longitudinally along the belt conveyor 1, with each section being at least 1 meter long. Its function is to conduct optical signals and separate the two adjacent sections B acoustic fiber 5 to avoid mutual interference.

[0045] The B-segment acoustic fiber 5 is wound around the fiber optic plate holder 2. The length of the fiber wound around it is 2 to 3 meters. Its function is to collect sound signals in addition to transmitting optical signals.

[0046] The fiber optic acoustic measurement substation 6 is connected to the A-segment acoustic measurement fiber 4. The fiber optic acoustic measurement substation 6 sends a pulsed light source to the A-segment acoustic measurement fiber 4 and receives the acoustic-optic modulation signal reflected by the A-segment acoustic measurement fiber 4. The fiber optic acoustic measurement substation 6 uses phase-sensitive optical time-domain reflectometer phase simulation coherent demodulation technology to demodulate the sound signal of each B-segment acoustic measurement fiber 5, and sends the sound signal of each B-segment acoustic measurement fiber 5 to the monitoring host 7 through Ethernet communication.

[0047] The monitoring host 7 is connected to the fiber optic acoustic measurement substation 6 via Ethernet, receives various audio signals uploaded by the fiber optic acoustic measurement substation 6, and analyzes them using monitoring software.

[0048] The monitoring software is installed on the monitoring host 7. The monitoring software functions include: system configuration, fiber optic acoustic host configuration, sound data analysis, local data storage, historical data display, real-time operating status display, fault alarm, etc.

[0049] After collecting acoustic information, the monitoring software automatically extracts acoustic features and compares them with various operating condition acoustic fingerprint databases to monitor the belt conveyor's operating status in real time. Once an anomaly occurs, the monitoring platform will issue a real-time alarm for the location and type of the fault.

[0050] Example 2

[0051] This embodiment discloses a method for monitoring abnormal sounds in a belt conveyor;

[0052] like Figure 2 As shown, the method for monitoring abnormal sounds of a belt conveyor based on the belt conveyor abnormal sound monitoring device described in Embodiment 1 includes:

[0053] Step S201: Collect sound signals from the belt conveyor in segments;

[0054] Step S202: Automatically extract the acoustic features of the segmented sound signals, and based on the acoustic features, perform segmented real-time monitoring of the belt conveyor's operating status.

[0055] Example 3

[0056] The purpose of this embodiment is to provide a computer-readable storage medium.

[0057] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a belt conveyor abnormal sound monitoring method as described in Embodiment 2 of this disclosure.

[0058] Example 4

[0059] The purpose of this embodiment is to provide an electronic device.

[0060] An electronic device includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of a belt conveyor abnormal sound monitoring method as described in Embodiment 2 of this disclosure.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A belt conveyor abnormal sound monitoring device, characterized in that, Includes fiber optic cable mounting base, optical fiber for sound measurement, optical fiber sound measurement substation, and monitoring host; The fiber optic mounting base is installed longitudinally along the belt conveyor to collect sound signals during belt conveyor operation in sections and transmit them to the acoustic optical fibers between the fiber optic mounting bases. The acoustic fiber is divided into section A and section B. Section B is wound on the fiber optic coil holder and is used to conduct optical signals and collect sound signals. Section A is laid longitudinally along the belt conveyor and is used to conduct optical signals and separate the two adjacent sections B to avoid mutual interference. The fiber optic cable holder is installed on one side of the belt conveyor support. Through its connection with the belt conveyor support, it collects the sound generated by the vibration of the belt conveyor support, the sound generated by the friction between the belt and the roller or idler, the sound generated by the friction between the belt and the support, and the sound generated by the bearing friction caused by the rotation of the roller or idler. The sound is then transmitted to the B-segment acoustic fiber wound on it. The fiber optic cable holder transmits the sound to the B-segment acoustic fiber wound on it, and the optical fiber is the one that ultimately performs the sound-to-light conversion. The fiber optic acoustic measurement substation is connected to the acoustic measurement fiber and is used to process the segmented sound signals on the acoustic measurement fiber. It uses phase-sensitive optical time-domain reflectometer phase simulation coherent demodulation technology to demodulate the sound signal of each B-segment acoustic measurement fiber and transmit it to the monitoring host. The monitoring host is connected to the fiber optic acoustic measurement substation and is used to automatically extract the acoustic features of segmented sound signals, compare them with various operating condition acoustic signature databases, and perform segmented real-time monitoring of the belt conveyor's operating status based on the acoustic features.

2. The belt conveyor abnormal sound monitoring device as described in claim 1, characterized in that, The fiber coil fixing seat is installed longitudinally along the belt conveyor. Specifically, the fiber coil fixing seat is installed on one side of the belt conveyor bracket by means of magnets or fixing screws, and the distance between two adjacent fiber coil fixing seats is the same.

3. The belt conveyor abnormal sound monitoring device as described in claim 1, characterized in that, The processing of the segmented sound signals on the acoustic fiber is specifically as follows: The fiber optic acoustic measurement substation sends a pulsed light source to the acoustic measurement fiber and receives the acousto-optic modulated signal reflected by the acoustic measurement fiber. The fiber optic acoustic measurement substation uses phase-sensitive optical time-domain reflectometer phase simulation coherent demodulation technology to demodulate the acoustic signal of each B-segment acoustic measurement fiber.

4. The belt conveyor abnormal sound monitoring device as described in claim 1, characterized in that, The monitoring host is connected to the fiber optic acoustic measurement substation via Ethernet, receives various audio signals uploaded by the fiber optic acoustic measurement substation, and analyzes them using monitoring software.

5. A belt conveyor abnormal sound monitoring device as described in claim 4, characterized in that, The segmented real-time monitoring of the belt conveyor's operating status specifically includes: The monitoring software automatically extracts acoustic features from the received segmented sound signals and compares them with various operating condition voiceprint databases to obtain the location and type of the fault.

6. A method for monitoring abnormal sounds of a belt conveyor based on a belt conveyor abnormal sound monitoring device as described in any one of claims 1-5, characterized in that, include: Segmented acquisition of sound signals from the belt conveyor; The acoustic features of segmented sound signals are automatically extracted, and the operating status of the belt conveyor is monitored in real time in segments based on these acoustic features.

7. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps in the belt conveyor abnormal sound monitoring method as described in claim 6.

8. An electronic device, comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the belt conveyor abnormal sound monitoring method as described in claim 6.

Images