An experimental device for health diagnosis of coal mine ventilator noise based on EMI

Abstract

The utility model belongs to the technical field of ventilator fault monitoring, and disclose a kind of coal mine ventilator noise health diagnosis experimental device based on EMI, including ventilator system, host computer and industrial computer box, several triaxial vibration intelligent sensors and several temperature sensors are installed on the ventilator system, each triaxial vibration intelligent sensor and temperature sensor are connected with host computer and industrial computer box.The technical scheme of the utility model can significantly improve the accuracy and reliability of fault diagnosis.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation fan fault monitoring technology, and in particular relates to an EMI-based experimental device for the health diagnosis of coal mine ventilation fan noise. Background Technology

[0002] As a key piece of equipment in coal mine production, the stable operation of coal mine ventilation fans is crucial for ensuring the safety of underground workers and maintaining normal production order. A malfunction in a ventilation fan can lead to serious consequences such as gas accumulation and air quality deterioration underground, and may even trigger a major safety accident. Therefore, real-time and accurate fault diagnosis and monitoring of coal mine ventilation fans is a core aspect of coal mine safety production management.

[0003] However, most existing coal mine ventilation fan fault diagnosis and monitoring systems rely on data from a single sensor for fault diagnosis. For example, they may depend solely on vibration sensors to monitor the fan's vibration or on temperature sensors to detect temperature changes. This single-data-source monitoring method has significant limitations. On the one hand, single-sensor data is easily affected by environmental interference and the sensor's own accuracy, leading to inaccurate or incomplete data, which in turn affects the reliability of the fault diagnosis results. On the other hand, ventilation fan faults are usually caused by the combined effects of multiple factors, and single-sensor data cannot fully capture the fault characteristics, easily leading to missed or misdiagnosed cases. Utility Model Content

[0004] The purpose of this invention is to provide an EMI-based experimental device for the health diagnosis of coal mine ventilation fan noise, in order to solve the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides an EMI-based experimental device for the health diagnosis of coal mine ventilation fan noise, including a ventilation fan system, a host computer, and an industrial control box. The ventilation fan system is equipped with several triaxial vibration intelligent sensors and several temperature sensors, and each of the triaxial vibration intelligent sensors and the temperature sensors is connected to the host computer and the industrial control box.

[0006] In practice, one end of each of the three-axis vibration intelligent sensors is magnetically connected to the ventilation system, and the other end is equipped with a first extension line. The first extension line has two ports, one of which is electrically connected to the industrial control box, and the other port is connected to the host computer via a 485 port.

[0007] In practice, the triaxial vibration intelligent sensor includes a first triaxial vibration intelligent sensor and a second triaxial vibration intelligent sensor. The first triaxial vibration intelligent sensor is magnetically installed at the air inlet of the ventilation system, and the second triaxial vibration intelligent sensor is magnetically installed at the air outlet of the ventilation system.

[0008] In practice, one end of each of the temperature sensors is magnetically connected to the ventilation system, and the other end is equipped with a second extension line. The second extension line has two ports, one of which is electrically connected to the industrial control box, and the other port is connected to the host computer via a network port.

[0009] In practice, the temperature sensor includes a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is magnetically mounted on the base of the ventilation system, and the second temperature sensor is magnetically mounted on the operating part of the ventilation system.

[0010] Implementable, the industrial control box includes a box body, inside which a power module, a control switch, a first speed controller, a second speed controller, and a PCB card slot are installed; cables are provided in the PCB card slot, and the various components of the box body are connected to the ventilation system and various sensors through cables.

[0011] In practice, the host computer is also connected to a display.

[0012] The technical effects of this utility model are as follows:

[0013] The multi-sensor fusion technology proposed in this invention integrates data from multiple sensors, making comprehensive use of information acquired by different types of sensors. This effectively compensates for the shortcomings of single-sensor monitoring, significantly improves the accuracy and reliability of fault diagnosis, and enables real-time display via a host computer, providing stronger protection for the safe and stable operation of coal mine ventilation fans. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall system structure in an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the industrial control box structure in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram showing the connection relationship of the various components in the embodiments of this utility model;

[0019] Figure 4 This is a schematic diagram of the fault diagnosis process in an embodiment of the present utility model.

[0020] Labeling Explanation: 1. First triaxial vibration intelligent sensor; 2. Second triaxial vibration intelligent sensor; 3. First temperature sensor; 4. Second temperature sensor; 5. Ventilation fan system; 6. Industrial control box; 601. Box body; 602. Power supply module; 603. Control switch; 604. Cable; 605. First speed controller; 606. Second speed controller; 607. PCB card slot; 7. Host computer; 8. Display. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-4 As shown, this embodiment provides an EMI-based coal mine ventilation fan noise health diagnosis experimental device, including a ventilation fan system 5, a host computer 7, and an industrial control box 6. The ventilation fan system 5 is equipped with several triaxial vibration intelligent sensors and several temperature sensors, and each of the triaxial vibration intelligent sensors and the temperature sensors is connected to the host computer 7 and the industrial control box 6.

[0028] This embodiment provides a coal mine ventilation fan fault diagnosis and monitoring system based on EMI, which can realize automatic signal acquisition. EMI piezoelectric impedance technology is a core technology of structural health monitoring (SHM) based on piezoelectric materials (such as PZT piezoelectric ceramics). It infers the mechanical state of the structure by measuring the change of electrical impedance of piezoelectric elements, and realizes high sensitivity detection of minor damage (such as cracks, fatigue, debonding).

[0029] This embodiment includes the acquisition of temperature signals and vibration signals. The system includes a first triaxial vibration intelligent sensor 1, a second triaxial vibration intelligent sensor 2, a first temperature sensor 3, a second temperature sensor 4, a ventilation fan system 5, an industrial control box 6, a host computer 7, and a display 8.

[0030] Among them, the bodies of the first temperature sensor 3 and the second temperature sensor 4 are magnetically connected to the ventilation system 5, and one end of their extension line is connected to the industrial control box 6 through the cable 604, and the other end is connected to the host computer 7 through the 485 port; the bodies of the first triaxial vibration intelligent sensor 1 and the second triaxial vibration intelligent sensor 2 are magnetically connected to the ventilation system 5, and one end of their extension line is connected to the industrial control box 6 through the cable 604, and the other end is connected to the host computer 7 through the network port.

[0031] This system is feasible and can automatically store signals. The first temperature sensor 3 and the second temperature sensor 4 use the Modbus RTU protocol for transmission and are connected to the host computer 7 via an RS-485 interface. The first triaxial vibration intelligent sensor 1 and the second triaxial vibration intelligent sensor 2 use the TCP protocol for transmission and are connected to the host computer 7 via a network port. The host computer 7 has built-in LabVIEW software that uses a Visa module to achieve serial communication and data storage.

[0032] The specific installation positions of each sensor are as follows: the first temperature sensor 3 is magnetically attached to the base of the ventilation system 5 to measure the external ambient temperature; the second temperature sensor 4 is magnetically attached to the operating part of the ventilation system 5 to measure the temperature when the fan is running; the first triaxial vibration intelligent sensor 1 is magnetically attached to the air inlet of the ventilation system 5 to measure the area of ​​greater vibration of the ventilation system 5; and the second triaxial vibration intelligent sensor 2 is magnetically attached to the air outlet of the ventilation system 5 to measure the area of ​​less vibration of the ventilation system 5.

[0033] In practice, the first temperature sensor 3 and the second temperature sensor 4 are used for steady-state measurements, taking the average value of the measurement data over a period of time; the first triaxial vibration intelligent sensor 1 and the second triaxial vibration intelligent sensor 2 are used for transient measurements, sampling 26,666 times per second to obtain accurate vibration data.

[0034] The industrial control box 6 consists of a box body 601, a power module 602, a control switch 603, a cable 604, a first speed controller 605, a second speed controller 606, and a PCB card slot 607. The power module 602 is bolted to the box body 601 to supply power to the industrial control box 6; the control switch 603 is bolted to the box body 601 to control the start and stop of the industrial control box 6; the first speed controller 605 and the second speed controller 606 are bolted to the box body 601 to control the speed of the ventilation fan system 5; the PCB card slot 607 is bolted to the box body 601 to constrain the cable 604; one end of the cable 604 is connected to various electronic components inside the box body 601 to provide current transmission, the cable harness is placed in the PCB card slot 607, and the other end passes through the box body 601 to connect to the sensor.

[0035] Feasible, this system can achieve signal recognition and processing. The host computer 7 uses a LabVIEW-integrated exe file in conjunction with Matlab software for signal processing. Specifically, it compares the data collected by the second temperature sensor 4 with the data collected by the first temperature sensor 3 to analyze the difference between the temperature of the ventilation fan system 5 and the ambient temperature. Furthermore, it fuses and analyzes the data collected by the first triaxial vibration intelligent sensor 1 and the second triaxial vibration intelligent sensor 2 using decision-level fusion. The system processes the data from both sensors separately, extracts feature vectors using wavelet packet decomposition, imports the feature vectors into an algorithm table for preliminary recognition, and then performs decision fusion on the recognition results, outputting a comprehensive decision result to achieve fault diagnosis and early warning.

[0036] In practice, this system can also display signals and diagnostic results. Specifically, in this embodiment, the host computer 7 is equipped with a 24-inch display 8, which uses LabVIEW integrated software interface to display the time-domain curve of the temperature signal, the time-frequency curve of the vibration signal, and the normal or fault status of the diagnosed ventilation system 5 in real time.

[0037] In summary, this embodiment proposes a multi-sensor fusion technology. By fusing data from multiple sensors, it can comprehensively utilize information acquired by different types of sensors, effectively compensate for the shortcomings of single-sensor monitoring, significantly improve the accuracy and reliability of fault diagnosis, and provide a stronger guarantee for the safe and stable operation of coal mine ventilation fans through the host computer 7.

[0038] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An EMI-based experimental device for health diagnosis of coal mine ventilation fan noise, characterized in that, The system includes a ventilation fan system (5), a host computer (7), and an industrial control box (6). The ventilation fan system (5) is equipped with several triaxial vibration intelligent sensors and several temperature sensors. Each of the triaxial vibration intelligent sensors and the temperature sensors is connected to the host computer (7) and the industrial control box (6).

2. The apparatus according to claim 1, characterized in that, One end of each of the three-axis vibration intelligent sensors is magnetically connected to the ventilation system (5), and the other end is equipped with a first extension line. The first extension line has two ports, one of which is electrically connected to the industrial control box (6), and the other port is connected to the host computer (7) via a 485 port.

3. The apparatus according to claim 1, characterized in that, The triaxial vibration intelligent sensor includes a first triaxial vibration intelligent sensor (1) and a second triaxial vibration intelligent sensor (2). The first triaxial vibration intelligent sensor (1) is magnetically installed at the air inlet of the ventilation system (5), and the second triaxial vibration intelligent sensor (2) is magnetically installed at the air outlet of the ventilation system (5).

4. The apparatus according to claim 1, characterized in that, One end of each of the temperature sensors is magnetically connected to the ventilation system (5), and the other end is equipped with a second extension line. The second extension line has two ports, one of which is electrically connected to the industrial control box (6), and the other port is connected to the host computer (7) via a network port.

5. The apparatus according to claim 1, characterized in that, The temperature sensor includes a first temperature sensor (3) and a second temperature sensor (4). The first temperature sensor (3) is magnetically mounted on the base of the ventilation system (5), and the second temperature sensor (4) is magnetically mounted on the operating part of the ventilation system (5).

6. The apparatus according to claim 1, characterized in that, The industrial control box (6) includes a box body (601), inside which a power module (602), a control switch (603), a first speed controller (605), a second speed controller (606), and a PCB card slot (607) are installed; a cable (604) is provided in the PCB card slot (607), and the components of the box body (601) are connected to the ventilation system (5) and various sensors through the cable (604).

7. The apparatus according to claim 1, characterized in that, The host computer (7) is also connected to a display (8).

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