A communication isolation module of a coal mining machine

Abstract

The utility model relates to communication isolation module design technical field, concretely relates to a coal -winning machine communication isolation module. The module includes: integrated main control unit, with at least one way independent CAN bus channel of main control unit connection, with at least one way independent RS485 bus channel of main control unit connection, each CAN bus channel and RS485 bus channel all contain communication isolation circuit and power supply isolation circuit. The module integrated 8 way independent CAN channel and 6 way independent RS485 channel. The design passes through multichannel integration and double isolation, has solved the problem that traditional scheme volume is big, and the problem that the anti -interference is poor, has improved the reliability and expansibility of coal -winning machine communication system obviously.

Description

Technical Field

[0001] This utility model relates to the field of communication isolation module design technology, specifically to a communication isolation module for a coal mining machine. Background Technology

[0002] In the field of coal mining machine electrical control systems, traditional communication solutions mostly employ discrete CAN bus and RS485 bus isolation devices. Existing technologies typically use single-channel or limited-channel communication isolation modules, requiring multiple independent isolation modules to be arranged within the control box, resulting in large space requirements and complex wiring. Furthermore, existing isolation devices often use a one-in-one-out bus architecture, with each node sharing the isolation circuit, which easily leads to signal crosstalk in environments with strong electromagnetic interference, causing problems such as increased communication frame error rates and frequent data retransmissions. The lack of complete isolation between communication lines and power supply lines further exacerbates the risk of signal distortion. Although some solutions attempt to improve anti-interference capabilities by adding shielding layers or optimizing wiring, limitations such as low module integration and poor channel scalability make it difficult to meet the multi-node, high-real-time communication requirements of modern coal mining machines. Especially in large-scale fully mechanized mining faces, existing technologies struggle to achieve an effective balance between multi-channel independent isolation and centralized control, hindering the intelligent upgrading process of coal mining machines.

[0003] Therefore, the existing technology still needs further development. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a communication isolation module for a coal mining machine to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned technical objectives, according to a first aspect of this utility model, this utility model provides a communication isolation module for a coal mining machine, comprising:

[0006] The main control unit with integrated settings;

[0007] At least one independent CAN bus channel connected to the main control unit;

[0008] At least one independent RS485 bus channel connected to the main control unit;

[0009] Each CAN bus channel and RS485 bus channel includes a communication isolation circuit and a power supply isolation circuit.

[0010] Specifically, the module includes:

[0011] Eight independent CAN bus channels connected to the main control unit.

[0012] Specifically, the module includes:

[0013] Six independent RS485 bus channels are connected to the main control unit.

[0014] Specifically, the module is equipped with a pluggable P1-P4 interface group, wherein:

[0015] The P1 and P2 interface groups include power supply interfaces and communication bus interfaces.

[0016] The P3 interface group includes 6 RS485 channels of A / B signal terminals.

[0017] The P4 interface group includes H / L signal terminals for 8 CAN channels.

[0018] Specifically, the P3 and P4 interface groups use 16-pin Phoenix terminals, with each RS485 channel corresponding to two signal terminals arranged in the order of A1 / B1 to A6 / B6, and each CAN channel corresponding to two signal terminals arranged in the order of CANH1 / CANL1 to CANH6 / CANL6.

[0019] Specifically, the power supply isolation circuit includes a 24V to 5V DC / DC module, whose input terminal is connected to the +24V / 0V terminal of the P2 interface, and whose output terminal filter is connected to the power supply of each channel.

[0020] Specifically, the communication isolation circuit uses an optocoupler isolation device, and a 120Ω terminating resistor is connected in parallel on each communication line.

[0021] Beneficial effects:

[0022] This utility model achieves the following significant advantages through integrated design:

[0023] Space utilization optimization: By integrating 8 independent CAN channels and 6 RS485 channels, and adopting a multi-input multi-output architecture to replace traditional discrete modules, the installation space occupancy is reduced by more than 80%, which is especially suitable for the compact electrical control box layout of coal mining machines.

[0024] Enhanced anti-interference capability: Each channel is independently equipped with a communication isolation circuit (optical coupler isolation) and a power supply isolation circuit (DC / DC isolation module + filter) to achieve dual isolation between signal and power supply, effectively suppressing signal crosstalk and bit errors caused by electromagnetic interference.

[0025] Enhanced communication reliability: Increased signal and power isolation effectively improves the anti-interference capability of the communication system and ensures the stability of multi-channel parallel communication.

[0026] Convenient for expansion and maintenance: The modular design of the P1-P4 interface group and the multi-channel coexistence design allow for quick identification of the faulty channel in case of equipment failure, and the channel can be directly replaced to reduce downtime during equipment modification.

[0027] Excellent system compatibility: The main control unit centrally manages the communication protocols of each channel, is compatible with coal mining machine controllers from different manufacturers, and has a 24V industrial power input to adapt to common underground power supply systems. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the circuit principle of the 8-channel RS485 isolation circuit provided in a specific embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of the circuit principle of the 6-channel CAN isolation circuit provided in a specific embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the power supply isolation circuit provided in a specific embodiment of this utility model;

[0031] Figure 4 This is a schematic diagram of the RS485 communication interface provided in a specific embodiment of this utility model;

[0032] Figure 5 This is a schematic diagram of the CAN communication and power supply interface provided in a specific embodiment of this utility model. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, the directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0034] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0035] Please see Figure 1-5 This utility model provides a communication isolation module for a coal mining machine, comprising:

[0036] The main control unit with integrated settings;

[0037] At least one independent CAN bus channel connected to the main control unit;

[0038] At least one independent RS485 bus channel connected to the main control unit;

[0039] Each CAN bus channel and RS485 bus channel includes a communication isolation circuit and a power supply isolation circuit.

[0040] Specifically, the module includes:

[0041] Eight independent CAN bus channels connected to the main control unit.

[0042] Specifically, the module includes:

[0043] Six independent RS485 bus channels are connected to the main control unit.

[0044] It should be further noted that the module uses a metal shielding housing, and the interior of the housing is divided into the following functional areas:

[0045] Main control unit: Installs STM32F407 main control chip, responsible for bus protocol parsing and channel management;

[0046] Communication interface area: includes 8 independent CAN bus channels and 6 independent RS485 bus channels, each channel is equipped with an independent isolation circuit;

[0047] Power Conversion Area: Contains DC / DC isolated power supply modules to convert external 24V input into isolated 5V power.

[0048] Specifically, the module is equipped with a pluggable P1-P4 interface group, wherein:

[0049] The P1 and P2 interface groups include power supply interfaces and communication bus interfaces.

[0050] The P3 interface group includes 6 RS485 channels of A / B signal terminals.

[0051] The P4 interface group includes H / L signal terminals for 8 CAN channels.

[0052] Specifically, the P3 and P4 interface groups use 16-pin Phoenix terminals, with each RS485 channel corresponding to two signal terminals arranged in the order of A1 / B1 to A6 / B6, and each CAN channel corresponding to two signal terminals arranged in the order of CANH1 / CANL1 to CANH6 / CANL6.

[0053] Further explanation is needed regarding the P3 interface group (RS485 interface):

[0054] It uses 16-pin Phoenix terminals, and the terminal arrangement is as follows:

[0055] Pins 1-2: RS485 channel 1, terminals A1 / B1;

[0056] Pins 3-4: RS485 channel 2, terminals A2 / B2;

[0057] ... (and so on up to pins 15-16: RS485 channel 8 A8 / B8 terminals);

[0058] The spacing between each pair of A / B terminals is 2.54mm, and a U-shaped isolation groove is provided between the terminals, which is filled with insulating silicone.

[0059] Specifically, the P4 interface group uses a 16-pin connector, and the CAN signals of each CAN channel are arranged in the order of CANH1 / CANL1 to CANH6 / CANL6.

[0060] Further explanation is needed regarding the P4 interface group (CAN interface):

[0061] Uses a 16-pin connector:

[0062] Pins 1-3: H1 / L1 terminals of CAN channel 1;

[0063] Pins 4-6: H2 / L2 terminals of CAN channel 2;

[0064] ... (and so on up to pins 11-12: H6 / L6 terminals of CAN channel 6);

[0065] Specifically, the power supply isolation circuit includes a 24V to 5V DC / DC module, whose input is connected to the +24V / 0V terminal of the P2 interface, and whose output is connected to the power supply of each channel via a ferrite bead filter.

[0066] Specifically, the communication isolation circuit uses an optocoupler isolation device, and a 120Ω terminating resistor is connected in parallel on each communication line.

[0067] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0068] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A communication isolation module for a coal mining machine, characterized in that, The module includes: The main control unit with integrated settings; At least one independent CAN bus channel connected to the main control unit; At least one independent RS485 bus channel connected to the main control unit; Each CAN bus channel and RS485 bus channel includes a communication isolation circuit and a power supply isolation circuit.

2. The coal mining machine communication isolation module according to claim 1, characterized in that, The module includes: Eight independent CAN channels connected to the main control unit.

3. The coal mining machine communication isolation module according to claim 1, characterized in that, The module includes: Six independent RS485 channels are connected to the main control unit.

4. The coal mining machine communication isolation module according to claim 1, characterized in that, The module is equipped with a pluggable screw-type P1-P4 interface group, wherein: The P1 and P2 interface groups include power supply interfaces and communication bus interfaces. The P3 interface group includes 6 RS485 channels of A / B signal terminals. The P4 interface group includes H / L signal terminals for 8 CAN channels.

5. The coal mining machine communication isolation module according to claim 4, characterized in that, The P3 and P4 interface groups use 16-pin Phoenix terminals, with each RS485 channel corresponding to two signal terminals arranged in the order of A1 / B1 to A6 / B6, and each CAN channel corresponding to two signal terminals arranged in the order of CANH1 / CANL1 to CANH6 / CANL6.

6. The coal mining machine communication isolation module according to claim 1, characterized in that, The power supply isolation circuit includes a 24V to 5V DC / DC module with an isolation voltage of 16000VDC. Its input terminal is connected to the +24V+ / 0V terminal of the P2 interface, and its output terminal is filtered and then connected to the power supply of each channel.

7. The coal mining machine communication isolation module according to claim 1, characterized in that, The communication isolation circuit uses an optocoupler isolation device, and a 120Ω terminating resistor is connected in parallel at the input of each communication line.

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