An integral structure of mine-used intrinsic safety controller

Abstract

The utility model discloses a mine intrinsic safety type controller of integral type structure, including control mainboard, net optical fiber template, shell and upper cover, four assembly integrals and satisfy the mine intrinsic safety characteristic requirement, control mainboard integrated signal acquisition interface, equipment communication interface and network interface are used for gathering coal mine downhole sensor signal and equipment operating condition data, export control command after data processing, and realize the network communication with ground platform, net optical fiber template is connected with control mainboard electricity, and integrated mine optical fiber switch function, the utility model provides a general, integral, interface protocol configurable, program upgradeable, the mine intrinsic safety type controller of high price advantage, is used for local fan, feeder switch, air door, accurate wind measurement, closed, electronic lookboard etc. Coal mine equipment intelligent monitoring, can realize the intellectualization with new installation equipment matched, can also do intelligent upgrading to the existing equipment of mine.

Description

Technical Field

[0001] This utility model relates to the field of controller technology, specifically an intrinsically safe controller for mining with an integrated structure. Background Technology

[0002] With the advancement of intelligent mine construction, the demand for real-time monitoring of parameters such as underground air volume, wind speed, harmful gases, dust, temperature, and humidity in coal mines, intelligent wind regulation and control, and real-time equipment monitoring and remote control is increasing. Currently, domestic equipment manufacturers, in order to adapt to the needs of intelligent mine construction, have launched various PLC-type mine fan frequency regulation and remote / near-distance control explosion-proof starting devices, and PLC+safety barrier type explosion-proof acquisition devices for collecting environmental parameters such as wind speed, air volume, and harmful gases. However, existing applications have many specifications, are not universal, are incompatible with sensors from different manufacturers, and are unsuitable for upgrading existing coal mine equipment. Furthermore, their structures are dispersed, requiring multiple cables to connect various modules, making installation and maintenance cumbersome, and prone to signal loss and electrical faults due to cable problems. Intrinsic safety design is inadequate, circuit boards lack tri-proof treatment, terminal insulation is poor, and the casing is not well-sealed, posing a risk of combustion and explosion. Therefore, those skilled in the art provide an integrated intrinsically safe mine controller to solve the problems mentioned in the background art. Utility Model Content

[0003] The purpose of this invention is to provide an intrinsically safe controller for mining with an integrated structure, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An intrinsically safe mining controller with an integrated structure includes a control motherboard, a fiber optic module, a housing, and a top cover. These four components are assembled as a single unit and meet the intrinsic safety requirements for mining applications. The control motherboard integrates a signal acquisition interface, a device communication interface, and a network interface for collecting sensor signals and equipment operating data from underground coal mines. After data processing, it outputs control commands and enables network communication with the ground platform. The fiber optic module is electrically connected to the control motherboard and integrates a mining fiber optic switch function for transmitting communication data between the control motherboard and the ground platform. The housing is used to fix the control motherboard, the fiber optic module, and the top cover. Handles are fixedly connected to the side walls of the housing, and waterproof connectors for external wiring are provided on the side walls. The top cover is sealed to the housing and has human-machine interface components for displaying data and operation.

[0005] Furthermore, the control motherboard uses a 32-bit Cortex®-M4 with FPU architecture STM32F407 ARM chip and is equipped with the FreeRTOS real-time operating system, while also integrating a 16-bit high-precision AD chip.

[0006] Furthermore, the signal acquisition interface of the control motherboard includes 14 input interfaces, 2 frequency signal acquisition interfaces, 10 PT100 temperature acquisition interfaces, and 12 4-20mA current signal acquisition interfaces. The device communication interface includes 2 RS485 sensor acquisition interfaces and 2 RS485 device communication interfaces.

[0007] Furthermore, the housing is made of stainless steel 403. The housing and the top cover, the housing and the waterproof connector, and the housing and the handle are all sealed. There are 28 waterproof connectors, with specifications of M18×1.5 and M16×1.5.

[0008] Furthermore, the human-machine interface component of the upper cover includes a color screen and operation buttons. The color screen is used to display collected data, equipment operating parameters, IP information, calendar and equipment information, while the operation buttons are used for local operation control.

[0009] Furthermore, the control motherboard acquires signals from 10 PT100 temperature acquisition interfaces and 12 4-20mA current signal acquisition interfaces by using a multiplexer in conjunction with an AD chip to achieve multi-channel signal acquisition.

[0010] Furthermore, the control motherboard supports remote program upgrades, and its RS485 interface protocol can be configured on-site to adapt to sensor protocols from different manufacturers.

[0011] Furthermore, the control motherboard, fiber optic template, and color screen adapter board in the top cover are all designed according to Class Ib intrinsic safety requirements for mining applications, and the circuit board surface is coated with conformal coating. The electrical distance between each external terminal meets the withstand voltage and insulation requirements of intrinsically safe mining equipment.

[0012] By adopting the above technical solution Compared with the prior art, the beneficial effects of this utility model are: 1. Stable communication: The integrated mining fiber optic switch in the fiber optic module has strong anti-interference capabilities, ensuring smooth bidirectional data transmission between underground and the surface, eliminating monitoring blind spots. Flexible adaptation: Supports RS485 interface protocol for on-site configuration and remote program upgrades without the need to replace the controller or disassemble the device. Adapts to different sensors, reducing downtime for maintenance. The intrinsically safe design using an ARM chip replaces the industry's PLC + safety barrier explosion-proof design, significantly reducing costs. The functions of the mining fiber optic switch are centralized in this product, eliminating the need for expensive external mining fiber optic switches and reducing installation requirements. High integration: Core components are integrated into the same housing, reducing redundant lines and signal interference, and simplifying installation.

[0013] 2. The device can be easily moved and inspected via a handle, significantly improving maintenance efficiency. It boasts excellent intrinsic safety performance, with core components designed to Class Ib intrinsic safety standards. The circuit board is coated with conformal coating and features a stainless steel sealed housing, enabling it to withstand harsh underground environments and reduce electrical safety hazards. It offers precise data acquisition and control, with 38 signal interfaces paired with a high-precision AD chip and a real-time operating system, enabling accurate acquisition and rapid processing of various data types, avoiding control delays, and ensuring stable equipment operation. The device is user-friendly, with a color screen that comprehensively displays data and operating conditions, and local buttons supporting quick operation for timely intervention by underground personnel. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of an integrated intrinsically safe controller for mining applications; Figure 2 This is a schematic diagram of the internal structure of the housing in an intrinsically safe mining controller with an integrated structure. Figure 3 This is a block diagram illustrating the communication principle of an integrated, intrinsically safe controller for mining applications. Figure 4 This is a flowchart illustrating the functional operation of an intrinsically safe mining controller with an integrated structure.

[0015] In the diagram: 1. Housing; 2. Top cover; 3. Waterproof connector M18×1.5; 4. Waterproof connector M16×1.5; 5. Fiber optic template; 6. Buttons; 7. Control motherboard; 8. Handle; 9. Color screen. Detailed Implementation

[0016] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] Please see Figures 1-4This utility model provides an embodiment of an intrinsically safe mining controller with an integrated structure, including a control motherboard 7, a fiber optic template 5, a housing 1, and a top cover 2. These four components are assembled as a single unit and meet the intrinsically safe characteristics required for mining applications. The control motherboard 7 integrates a signal acquisition interface, a device communication interface, and a network interface for collecting sensor signals and equipment operating data from underground coal mines. After data processing, it outputs control commands and enables network communication with the ground platform. The fiber optic template 5 is electrically connected to the control motherboard 7 and integrates a mining fiber optic switch function for transmitting communication data between the control motherboard 7 and the ground platform. The housing 1 is used to fix the control motherboard 7, the fiber optic template 5, and the top cover 2. A handle 8 is fixedly connected to the side wall of the housing 1, and a waterproof connector for external wiring is provided on the side wall of the housing 1. The top cover 2 is sealed to the housing 1 and has a human-machine interface component for displaying data and operation. The control motherboard 7 uses a 32-bit Cortex®-M4 with FPU architecture STM32F407. The system uses an ARM chip and runs on the FreeRTOS real-time operating system. It also integrates a 16-bit high-precision AD chip. The signal acquisition interfaces of the control motherboard 7 include 14 input interfaces, 2 frequency signal acquisition interfaces, 10 PT100 temperature acquisition interfaces, and 12 4-20mA current signal acquisition interfaces. The device communication interfaces include 2 RS485 sensor acquisition interfaces and 2 RS485 device communication interfaces. The housing 1 is made of 403 stainless steel. The housing 1 is sealed to the top cover 2, the waterproof connector, and the handle 8. There are 28 waterproof connectors, with specifications of M18×1.53 and M16×1.54. The human-machine interface components of the top cover 2 include a color screen 9 and operation buttons 6. The color screen 9 displays acquired data, device operating parameters, IP information, calendar, and device information. Button 6 is used for local operation control. The control motherboard 7 acquires signals from 10 PT100 temperature acquisition interfaces and 12 4-20mA current signal acquisition interfaces. Multiple signal acquisition is achieved through a multiplexer and an AD chip. The control motherboard 7 supports remote program upgrades, and its RS485 interface protocol can be configured on-site to adapt to sensor protocols from different manufacturers. The control motherboard 7, the fiber optic template 5, and the color screen 9 adapter board in the upper cover plate 2 are all designed according to Class Ib intrinsic safety requirements for mining applications. The circuit board surface is coated with conformal coating, and the electrical distance between each external terminal meets the withstand voltage and insulation requirements of intrinsically safe mining equipment. The integrated assembly of the housing 1, upper cover plate 2, control motherboard 7, and fiber optic template 5 enables intelligent monitoring of multiple scenarios underground. The housing 1 is made of 403 stainless steel, and the upper cover plate 2 has dimensions of M18×1.5 and M16×1.The waterproof connector at 5 and the sealed connection of the handle at 8 meet the dustproof and waterproof requirements of intrinsically safe mining equipment. The control motherboard at 7, the fiber optic template at 5, and the color screen at 9 inside the top cover at 2 are all designed according to Class Ib intrinsically safe mining standards. The circuit board surface is coated with conformal coating, and each external terminal maintains sufficient electrical distance to meet the withstand voltage and insulation requirements, making it suitable for damp, dusty, and explosion-proof underground environments.

[0018] During operation, the control motherboard 7 first acquires real-time sensor monitoring signals and equipment operating data from underground coal mines through its integrated 14-channel input interface, 2-channel frequency signal acquisition interface, 10-channel PT100 temperature acquisition interface, 12-channel 4-20mA current signal acquisition interface, 2-channel RS485 sensor acquisition interface, and 2-channel RS485 device communication interface. Furthermore, it achieves efficient and accurate acquisition of multiple signals through a multiplexer and a 16-bit high-precision AD chip. The control motherboard 7 then performs rapid calculations, filtering, and analysis on the acquired raw data, selects valid data, generates equipment control commands, and outputs them to the underground execution equipment via the device communication interface, thereby enabling control of the underground equipment. The equipment is under real-time control. The fiber optic module 5, which is electrically connected to the control motherboard 7, uses its integrated mining fiber optic switch function to transmit the equipment operating data and sensor monitoring data processed by the control motherboard 7 to the ground platform. At the same time, it receives remote control commands issued by the ground platform, realizing stable two-way communication between the underground and the ground platform. The color screen 9 on the upper cover 2 displays the collected data, equipment operating parameters, IP information, calendar, and basic equipment information in real time. The operation buttons 6 support local start / stop control and parameter settings. The control motherboard 7 also supports remote program upgrades and on-site configuration of the RS485 interface protocol. It can be adapted to sensors from different manufacturers without disassembling the machine, further improving the flexibility of equipment operation and maintenance.

[0019] Stable communication, the integrated mining fiber optic switch in the 5-panel fiber optic module boasts strong anti-interference capabilities, ensuring smooth bidirectional data transmission between underground and surface environments, eliminating monitoring blind spots, and offering flexible adaptability. It supports RS485 interface protocol for on-site configuration and remote program upgrades without requiring controller replacement or disassembly. Adaptable to various sensors, it reduces downtime for maintenance. Utilizing an intrinsically safe ARM chip design, it replaces the industry-standard PLC + safety barrier explosion-proof design, significantly reducing costs. The functionality of a mining fiber optic switch is centralized in this product, eliminating the need for expensive external mining fiber optic switches and reducing installation requirements. High integration, with core components housed in a single enclosure. Body 1 reduces redundant lines and signal interference, simplifying installation; handle 8 allows for convenient handling and maintenance, significantly improving operation and maintenance efficiency; excellent intrinsic safety performance, with core components designed according to Class Ib intrinsic safety, circuit boards coated with conformal coating, and stainless steel sealed housing 1, which can withstand the harsh underground environment and reduce electrical safety hazards; precise data acquisition and control, with 38 signal interfaces paired with a high-precision AD chip and real-time operating system, enabling accurate acquisition and rapid processing of various types of data, avoiding control delays, ensuring stable equipment operation; user-friendly interface, color screen 9 can fully display data and operating conditions, and local buttons 6 support quick operation, facilitating timely intervention by underground personnel.

[0020] This specification describes embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated structure mine intrinsically safe controller, characterized by, The system includes a control motherboard (7), a fiber optic template (5), a housing (1), and a top cover (2). The four components are assembled into one unit and meet the intrinsic safety requirements for mining applications. The control motherboard (7) integrates a signal acquisition interface, a device communication interface, and a network interface. It is used to collect sensor signals and equipment operating data in the coal mine. After data processing, it outputs control commands and realizes network communication with the ground platform. The fiber optic template (5) is electrically connected to the control motherboard (7) and integrates the function of a mining fiber optic switch. It is used to transmit communication data between the control motherboard (7) and the ground platform. The housing (1) is used to fix the control motherboard (7), the fiber optic template (5), and the top cover (2). The side wall of the housing (1) is fixedly connected to a handle (8), and the side wall of the housing (1) is provided with a waterproof connector for external wiring. The top cover (2) is sealed to the housing (1), and the top cover (2) is provided with a human-machine interaction component for displaying data and operation.

2. The mine-used intrinsically safe controller of integrated structure according to claim 1, characterized in that, The control motherboard (7) uses a 32-bit Cortex®-M4 with FPU architecture STM32F407 ARM chip and is equipped with the FreeRTOS real-time operating system. It also integrates a 16-bit high-precision AD chip.

3. The intrinsically safe mining controller with an integrated structure according to claim 1, characterized in that, The signal acquisition interface of the control motherboard (7) includes 14 input interfaces, 2 frequency signal acquisition interfaces, 10 PT100 temperature acquisition interfaces and 12 4-20mA current signal acquisition interfaces. The device communication interface includes 2 RS485 sensor acquisition interfaces and 2 RS485 device communication interfaces.

4. The intrinsically safe mining controller with an integrated structure according to claim 1, characterized in that, The housing (1) is made of stainless steel 403. The housing (1) and the top cover (2), the housing (1) and the waterproof connector, and the housing (1) and the handle (8) are all sealed. There are 28 waterproof connectors, with specifications of waterproof connector M18×1.5 (3) and waterproof connector M16×1.5 (4).

5. The intrinsically safe mining controller with an integrated structure according to claim 1, characterized in that, The human-machine interaction components of the upper cover plate (2) include a color screen (9) and operation buttons (6). The color screen (9) is used to display collected data, equipment operating parameters, IP information, calendar and equipment information. The operation buttons (6) are used for local operation control.

6. The intrinsically safe mining controller with an integrated structure according to claim 1, characterized in that, The control motherboard (7) acquires signals from 10 PT100 temperature acquisition interfaces and 12 4-20mA current signal acquisition interfaces, and achieves multi-channel signal acquisition through a multiplexer and an AD chip.

7. The intrinsically safe mining controller with an integrated structure according to claim 1, characterized in that, The control motherboard (7) supports remote program upgrades, and its RS485 interface protocol can be configured on-site to adapt to sensor protocols from different manufacturers.

8. The intrinsically safe mining controller with an integrated structure according to claim 1, characterized in that, The control motherboard (7), the fiber optic template (5), and the color screen (9) adapter board in the upper cover plate (2) are all designed according to the intrinsic safety requirements of Class Ib mining equipment, and the circuit board surface is coated with three-proof paint. The electrical distance between each external terminal meets the withstand voltage insulation requirements of intrinsically safe mining equipment.

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