Data processing device and method

Abstract

The invention discloses a data processing device and method, and belongs to the field of electric control of coal mining machines. The data processing device is mainly applied to an electric cabinet of a coal mining machine. A power supply unit is used for converting a first direct-current power supply into a second direct-current power supply; and converting the received CAN signal into an RS485 signal by adopting an interface conversion unit, and sending the RS485 signal to an electric cabinet bus. Stable conversion between a CAN signal and an RS485 signal is realized through the interface conversion unit so as to ensure uniformity of communication modes, and circuit isolation is realized by utilizing the power supply unit and adopting a power supply conversion mode so as to meet the requirement of a coal mining machine electric cabinet for a sealed explosion-proof environment, effectively suppress interference and provide stability for stability of system data input and data output.

Description

Technical Field

[0001] This application relates to the field of electrical control for coal mining machines, and in particular to data processing devices and methods. Background Technology

[0002] With the continuous development of coal mining technology, coal mining machines, as key equipment in coal mining, are constantly improving in terms of automation and intelligence. The electrical control system of the coal mining machine, as its core control component, needs to interact with various sensors to achieve precise control and status monitoring. In the electrical control system of the coal mining machine, CAN bus and RS485 bus are typically used as the main communication methods.

[0003] Currently, the main sensor communication interfaces in coal mining machine electrical control systems are CAN and RS485 interfaces. CAN bus offers advantages such as high communication speed and strong anti-interference capabilities, while RS485 bus features long transmission distance and flexible networking. In practical applications, external sensors in coal mining machines mostly use CAN interfaces, while redundant sensor interfaces in the electrical control system are mostly RS485 interfaces. This inconsistency in communication methods creates difficulties for system integration.

[0004] However, existing communication conversion solutions have the following problems:

[0005] First, directly connecting sensors to the redundant CAN interface of the electrical control system would interfere with bus communication, and the electrical control system cannot provide a large number of redundant CAN interfaces, making it difficult to meet the needs of multiple sensors in the coal mining machine. Second, most existing communication modules contain independent power supplies, requiring independent power supply, which is unsuitable for the sealed explosion-proof environment of the coal mining machine's electrical control box. As an explosion-proof device, the coal mining machine's electrical control box has limited internal space and must meet explosion-proof requirements; the independent power supply design of existing communication modules increases the complexity and safety hazards inside the control box. Summary of the Invention

[0006] To address the problems of existing technologies, a data processing device and method are provided to achieve stable conversion between CAN signals and RS485 signals, ensuring the uniformity of communication methods, while meeting the requirements of the sealed and explosion-proof environment of the coal mining machine's electrical control box, thereby improving the reliability and stability of the system.

[0007] This application provides a data processing device, applied in the electrical control box of a coal mining machine, comprising:

[0008] A power supply unit for converting a first DC power supply into a second DC power supply;

[0009] An interface conversion unit, connected to the output of the power supply unit, is used to receive CAN signals, convert the CAN signals into RS485 signals, and send the RS485 signals to the electrical control box bus.

[0010] Optionally, the power supply unit includes:

[0011] The first power module includes a first output terminal and a second output terminal;

[0012] The conversion module includes a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal. The first input terminal of the conversion module is connected to the first output terminal of the first power module, and the second input terminal of the conversion module is connected to the second output terminal of the first power module.

[0013] The second power module includes a first output terminal and a second output terminal. The first output terminal of the second power module is connected to the third input terminal of the conversion module, and the second output terminal of the second power module is connected to the fourth input terminal of the conversion module.

[0014] Optionally, the power supply unit further includes:

[0015] The first capacitor C1 is connected between the first input terminal and the second input terminal of the conversion module.

[0016] Optionally, the power supply unit further includes:

[0017] The second capacitor C2 is connected between the third input terminal and the fourth input terminal of the conversion module;

[0018] The third capacitor C3 is connected between the third input terminal and the fourth input terminal of the conversion module;

[0019] The first resistor R1 is connected between the third input terminal and the fourth input terminal of the conversion module.

[0020] Optionally, the interface conversion unit includes:

[0021] A CAN interface module is used to receive or send the CAN signal, and the CAN interface is connected to the bus of the electrical control box.

[0022] A processing module, connected to the CAN interface module, is used to convert the CAN signal into the RS485 signal;

[0023] An RS485 transceiver module, connected to the processing module, is used to output the RS485 signal under electrical isolation conditions;

[0024] A protection module, connected to the CAN interface module, is used to provide overvoltage protection for the CAN interface module.

[0025] Optionally, the first and second interfaces of the CAN interface module are connected to the bus of the electrical control box;

[0026] The protection module includes:

[0027] The first diode is connected between the first interface of the CAN interface module and the power ground;

[0028] The second diode is connected between the second interface of the CAN interface module and the power ground;

[0029] The second resistor R2 is connected between the first interface of the CAN interface module and the second interface of the CAN interface module.

[0030] Optionally, the first diode is a transient voltage suppressor diode, and the second diode is a transient voltage suppressor diode.

[0031] Optionally, the first power module may use an intrinsically safe power supply.

[0032] Optionally, the second power module uses an intrinsically safe power supply.

[0033] This application also provides a data processing method, applied in the electrical control box of a coal mining machine, including:

[0034] Convert the first DC power supply to the second DC power supply;

[0035] Receive CAN signals, convert the CAN signals into RS485 signals, and send the RS485 signals to the electrical control box bus.

[0036] The beneficial effects of the above technical solution are as follows:

[0037] In this technical solution, the data processing device is mainly used in the electrical control box of a coal mining machine. A power supply unit converts a first DC power supply to a second DC power supply. An interface conversion unit converts the received CAN signal into an RS485 signal and sends the RS485 signal to the control box bus. The interface conversion unit achieves stable conversion between CAN and RS485 signals to ensure communication consistency. The power supply unit uses power conversion to achieve circuit isolation, meeting the requirements of the sealed explosion-proof environment of the coal mining machine's electrical control box, effectively suppressing interference and providing stability for system data input and output. Attached Figure Description

[0038] Figure 1 This is a block diagram of one embodiment of the data processing apparatus described in this application;

[0039] Figure 2 This is a circuit diagram of one embodiment of the power supply unit described in this application;

[0040] Figure 3 This is a circuit diagram of one embodiment of the interface conversion unit described in this application. Detailed Implementation

[0041] The advantages of this application are further illustrated below with reference to the accompanying drawings and specific embodiments.

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0043] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0044] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0045] In the description of this application, it should be understood that the numerical labels before the steps do not indicate the order of the steps, but are only used to facilitate the description of this application and to distinguish each step, and therefore should not be construed as a limitation of this application.

[0046] The data processing device in this embodiment is mainly used in the electrical control box of a coal mining machine. A power supply unit converts a first DC power supply to a second DC power supply. An interface conversion unit converts the received CAN signal into an RS485 signal and sends the RS485 signal to the control box bus. The interface conversion unit achieves stable conversion between CAN and RS485 signals to ensure communication consistency. The power supply unit uses power conversion to achieve circuit isolation, meeting the requirements of the sealed and explosion-proof environment of the coal mining machine's electrical control box. This effectively suppresses interference and provides stability for system data input and output.

[0047] Example 1

[0048] See Figures 1-3 A data processing device, used in the electrical control box of a coal mining machine, includes: a power supply unit and an interface conversion unit;

[0049] The power supply unit is used to convert the first DC power supply into the second DC power supply; the interface conversion unit is connected to the output terminal of the power supply unit and is used to receive CAN signals, convert the CAN signals into RS485 signals, and send the RS485 signals to the electrical control box bus.

[0050] In this embodiment, the power supply unit includes: a first power supply module, a conversion module, and a second power supply module.

[0051] The first power module includes a first output terminal and a second output terminal;

[0052] The conversion module U1 includes a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal. The first input terminal of the conversion module U1 is connected to the first output terminal of the first power module, and the second input terminal of the conversion module U1 is connected to the second output terminal of the first power module.

[0053] The second power module includes a first output terminal and a second output terminal. The first output terminal of the second power module is connected to the third input terminal of the conversion module U1, and the second output terminal of the second power module is connected to the fourth input terminal of the conversion module U1.

[0054] Furthermore, the power supply unit may also include a first capacitor C1, which is connected between the first input terminal and the second input terminal of the conversion module U1. The function of the first capacitor C1 is filtering, which can filter out the AC component in the DC power output from the first power supply module, making the DC power received by the conversion module U1 more stable.

[0055] Furthermore, the power supply unit also includes: a second capacitor C2, a third capacitor C3, and a first resistor R1;

[0056] The second capacitor C2 is connected between the third input terminal and the fourth input terminal of the conversion module U1 to provide an impedance loop, thereby reducing interference to other circuits.

[0057] The third capacitor C3 is connected between the third input terminal and the fourth input terminal of the conversion module U1.

[0058] The first resistor R1 is connected between the third input terminal and the fourth input terminal of the conversion module U1.

[0059] In this embodiment, the second capacitor C2, the third capacitor C3, and the first resistor R1 are used to filter and regulate the DC power output from the second power module, ensuring that the DC power received by the conversion module U1 is stable and reliable.

[0060] In this embodiment, the first power module uses a non-intrinsically safe power supply; the second power module uses an intrinsically safe power supply.

[0061] In practical applications, the first DC power supply can be the 24V DC power supply in the coal mining machine's electrical control box, and the second DC power supply can be the 5V DC power supply. The conversion module U1 can use a DC-DC converter to convert the 24V DC power supply to the 5V DC power supply, providing a stable operating power supply for the interface conversion unit.

[0062] For example and not as a limitation, the DC-DC converter can be model WRF2405CKS-1W. The first capacitor C1 is a 2.2μF / 50V capacitor, the second capacitor C2 is a 10μF / 16V capacitor, the third capacitor C3 is a 10μF / 16V capacitor, and the first resistor R1 is a 180Ω / 0.5W resistor.

[0063] See Figure 2As shown, the first DC power supply (24V DC power supply) is connected to the GND and Vin pins of the conversion module U1. The first DC power supply is connected in parallel with the first capacitor C1 to stabilize the input voltage and suppress high-frequency noise and transient interference. The second power supply module (5V DC power supply) is connected to the +V0 and 0V pins of the conversion module U1. A second capacitor C2 is connected in parallel with the +V0 and CS pins to provide an impedance loop, reducing interference to other circuits. A third capacitor C3 is connected in parallel with the +V0 and 0V pins to stabilize the input voltage, filter out low- and mid-frequency noise, and improve the system's anti-interference capability. The second power supply module is also connected in parallel with the first resistor R1 to achieve static discharge and voltage stability. The power supply unit avoids the high energy of the first DC power supply (non-intrinsically safe circuit) from affecting the intrinsically safe circuit through isolated power supply. High-frequency and low- and mid-frequency graded filtering can form a complementary filter network, reducing common-mode interference and improving the system's anti-interference capability and reliability, making it suitable for use in coal mines where safety and stability requirements are high. Software development using a real-time operating system features multi-threaded parallelism, high real-time performance, and strong transmission stability.

[0064] Non-intrinsically safe power supplies refer to electrical equipment that may produce ignitable sparks or have thermal effects that could cause an explosion under normal operation and specified fault conditions. Intrinsically safe power supplies refer to electrical equipment that will not produce ignitable sparks or have thermal effects that could cause an explosion under normal operation and specified fault conditions. Using a non-intrinsically safe power supply as the first power module can provide a larger current and voltage to meet the system's power requirements; using an intrinsically safe power supply as the second power module can ensure safe and reliable operation in flammable and explosive environments such as coal mines.

[0065] In this embodiment, the interface conversion unit includes: a CAN interface module, a processing module, an RS485 transceiver module, and a protection module;

[0066] CAN interface module U4 is used to receive or send the CAN signal, and the CAN interface is connected to the bus of the electrical control box;

[0067] Processing module U3, connected to CAN interface module U4, is used to convert the CAN signal into the RS485 signal;

[0068] RS485 transceiver module U2 is connected to the processing module U3 and is used to output the RS485 signal;

[0069] The protection module is connected to the CAN interface module U4 and is used to provide overvoltage protection for the CAN interface module U4.

[0070] Furthermore, the first and second interfaces of the CAN interface module U4 are connected to the bus of the electrical control box;

[0071] The protection module includes:

[0072] The first diode D1 is connected between the first interface of the CAN interface module U4 and the power ground;

[0073] The second diode D2 is connected between the second interface of the CAN interface module U4 and the power ground;

[0074] The second resistor R2 is connected between the first interface of the CAN interface module U4 and the second interface of the CAN interface module U4.

[0075] Specifically, both the first diode D1 and the second diode D2 are transient voltage suppressor diodes. Transient voltage suppressor diodes can effectively suppress transient high voltages in the circuit, protecting the CAN interface module U4 from overvoltage damage.

[0076] It should be noted that the interface conversion unit can support simultaneous access from 5 sensors, enabling efficient real-time data processing.

[0077] In this embodiment, the RS485 transceiver module U2 uses the SN75LBC184D chip, the processing module U3 can use the STM32F105RCT6 chip, and the CAN interface module U4 can use the PCA82C251T transceiver. The non-intrinsically safe 24V power supply unit is the external power input, and the intrinsically safe 5V output under electrical isolation is connected to the +5V and 0V pins of the RS485 transceiver module U2.

[0078] See Figure 3 The CAN_TX pin of RS485 transceiver module U2 is connected to the CAN2_TX pin of processing module U3; the CAN_RX pin of RS485 transceiver module U2 is connected to the CAN2_RX pin of processing module U3; the SC1_TX pin of RS485 transceiver module U2 is connected to the UART_TX pin of processing module U3; the SC1_RX pin of RS485 transceiver module U2 is connected to the UART_RX pin of processing module U3; the CAN_H and CAN_L pins of RS485 transceiver module U2 are connected to the bus terminals of the electrical control box; the 485_A pin of RS485 transceiver module U2 is connected to the bus terminals of the electrical control box after being connected in series with a fuse; the 485_B pin of RS485 transceiver module U2 is connected to the bus terminals of the electrical control box after being connected in series with a fuse.

[0079] A second resistor R2 is connected in parallel between the first interface (CAN_H pin) and the second interface (CAN_L pin) of the CAN interface module U4. The two ends of the second resistor R2 are connected to the bus terminals of the electrical control box to absorb the energy at the end of the transmission line and suppress signal reflection.

[0080] In this embodiment, the CAN interface module U4 can be a CAN transceiver chip, such as TJA1050 or MCP2551, used to receive and transmit CAN signals. The processing module U3 can be a microcontroller or a dedicated protocol conversion chip, such as an STM32 series microcontroller or a dedicated CAN to RS485 converter chip, used to convert between the CAN protocol and the RS485 protocol. The RS485 transceiver module U2 is used to receive and transmit RS484 signals.

[0081] In practical applications, when equipment in the coal mining machine's electrical control box needs to communicate via the CAN bus, the CAN signal enters the processing module U3 through the CAN interface module U4. The processing module U3 converts the CAN signal into an RS485 signal, which is then output to the electrical control box bus through the RS485 transceiver module U2. Similarly, when there is an RS485 signal on the electrical control box bus that needs to be sent to the CAN bus, the RS485 transceiver module U2 receives the RS485 signal, the processing module U3 converts the RS485 signal into a CAN signal, and then sends it to the CAN bus through the CAN interface module U4.

[0082] The data processing device in this embodiment converts a first DC power supply to a second DC power supply through a power supply unit, achieving circuit isolation to meet the requirements of the sealed explosion-proof environment of the coal mining machine's electrical control box. This effectively suppresses interference, ensuring stability for system data input and output, and providing a stable power supply for the interface conversion unit. The interface conversion unit converts between CAN signals and RS485 signals, enabling devices using different communication protocols to communicate with each other. This device has a simple structure, reliable function, and is suitable for the data processing needs of the coal mining machine's electrical control box.

[0083] The data processing device is housed within the coal mining machine's electrical control box. It is compact in size, can be directly powered by the electrical control system, and has low power consumption. Intrinsically safe and non-intrinsically safe sensors are connected to different interfaces, simultaneously meeting the access requirements of up to five sensors. The software is developed using a real-time operating system, offering strong real-time performance and stability, adapting to the data transmission environment of underground coal mines, and maintaining reliable communication even under strong vibration. The communication methods of the external sensors on the coal mining machine enhance the stability of the electrical control system and facilitate its debugging.

[0084] The data processing device in this embodiment overcomes the problems of limited external interfaces and poor communication stability of existing RS485 and CAN communication modules. It supports multiple CAN communication interfaces and uses power supply isolation between intrinsically safe and non-intrinsically safe sensors, providing a guarantee for the complex and special communication environment in coal mines. Compared with traditional communication conversion modules, which are prone to poor contact and high data packet loss rates in the vibration environment of coal mining machines, resulting in compromised real-time performance and stability of data transmission, this embodiment ensures accurate and efficient data transmission while maintaining a unified communication method. Utilizing a power supply unit with power conversion, it achieves circuit isolation to meet the requirements of the sealed and explosion-proof environment of the coal mining machine's electrical control box, effectively suppressing interference and providing stability for system data input and output. It exhibits strong real-time performance and stability, adapting to the data transmission environment in coal mines, and maintaining reliable communication connections even under strong vibration.

[0085] Example 2

[0086] A data processing method, applied in the electrical control box of a coal mining machine, includes converting a first DC power supply to a second DC power supply; receiving a CAN signal, converting the CAN signal to an RS485 signal, and sending the RS485 signal to the electrical control box bus.

[0087] In this embodiment, the process of converting the first DC power supply to the second DC power supply includes the following steps:

[0088] First, the first power module outputs a first DC power supply, which is output through the first output terminal and the second output terminal of the first power module and connected to the first input terminal and the second input terminal of the conversion module U1, respectively.

[0089] Then, the conversion module U1 converts the received first DC power supply into a second DC power supply. The second DC power supply is output through the third and fourth input terminals of the conversion module U1 and connected to the first and second output terminals of the second power supply module, respectively.

[0090] During the conversion process, the first capacitor C1 is connected between the first input terminal and the second input terminal of the conversion module U1 to filter out the AC component in the first DC power supply. The second capacitor C2, the third capacitor C3, and the first resistor R1 are connected between the third input terminal and the fourth input terminal of the conversion module U1 to filter and regulate the second DC power supply.

[0091] The process of receiving a CAN signal, converting it to an RS485 signal, and sending the RS485 signal to the control box bus includes the following steps:

[0092] First, the CAN interface module U4 receives CAN signals from the electrical control box bus through its first and second interfaces. During the reception process, the first diode D1, the second diode D2, and the second resistor R2 in the protection module provide overvoltage protection for the CAN interface module U4, preventing it from being damaged by electrical interference or overvoltage.

[0093] Then, the CAN interface module U4 transmits the received CAN signal to the processing module U3, which parses and processes the CAN signal and converts it into RS485 signal format.

[0094] Finally, the processing module U3 transmits the converted RS485 signal to the RS485 transceiver module U2, which then outputs the RS485 signal to the control box bus, completing the signal conversion and transmission process.

[0095] In this embodiment, the first DC power supply can be a 24V DC power supply, and the second DC power supply can be a 5V DC power supply. The transmission rate of the CAN signal can be 250kbps, 500kbps, or 1Mbps, and the transmission rate of the RS485 signal can be 9600bps, 19200bps, or 115200bps, depending on the system's communication requirements and device compatibility.

[0096] The data processing method in this embodiment provides stable power support for signal conversion by converting a first DC power supply to a second DC power supply; it receives CAN signals, converts them to RS485 signals, and sends the RS485 signals to the electrical control box bus, thus achieving conversion and compatibility between different communication protocols. This method is simple to operate, reliable, and suitable for the data processing needs of coal mining machine electrical control boxes.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A data processing device, applied in the electrical control box of a coal mining machine, characterized in that, include: A power supply unit for converting a first DC power supply into a second DC power supply; An interface conversion unit, connected to the output of the power supply unit, is used to receive CAN signals, convert the CAN signals into RS485 signals, and send the RS485 signals to the electrical control box bus.

2. The data processing apparatus according to claim 1, characterized in that, The power supply unit includes: The first power module includes a first output terminal and a second output terminal; The conversion module includes a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal. The first input terminal of the conversion module is connected to the first output terminal of the first power module, and the second input terminal of the conversion module is connected to the second output terminal of the first power module. The second power module includes a first output terminal and a second output terminal. The first output terminal of the second power module is connected to the third input terminal of the conversion module, and the second output terminal of the second power module is connected to the fourth input terminal of the conversion module.

3. The data processing apparatus according to claim 2, characterized in that, The power supply unit further includes: The first capacitor C1 is connected between the first input terminal and the second input terminal of the conversion module.

4. The data processing apparatus according to claim 2, characterized in that, The power supply unit further includes: The second capacitor C2 is connected between the third input terminal and the fourth input terminal of the conversion module; The third capacitor C3 is connected between the third input terminal and the fourth input terminal of the conversion module; The first resistor R1 is connected between the third input terminal and the fourth input terminal of the conversion module.

5. The data processing apparatus according to claim 1, characterized in that, The interface conversion unit includes: A CAN interface module is used to receive or send the CAN signal, and the CAN interface is connected to the bus of the electrical control box. A processing module, connected to the CAN interface module, is used to convert the CAN signal into the RS485 signal; An RS485 transceiver module, connected to the processing module, is used to output the RS485 signal under electrical isolation conditions; A protection module, connected to the CAN interface module, is used to provide overvoltage protection for the CAN interface module.

6. The data processing apparatus according to claim 5, characterized in that, The first and second interfaces of the CAN interface module are connected to the bus of the electrical control box. The protection module includes: The first diode is connected between the first interface of the CAN interface module and the power ground; The second diode is connected between the second interface of the CAN interface module and the power ground; The second resistor R2 is connected between the first interface of the CAN interface module and the second interface of the CAN interface module.

7. The data processing apparatus according to claim 6, characterized in that, The first diode is a transient voltage suppression diode, and the second diode is a transient voltage suppression diode.

8. The data processing apparatus according to claim 2, characterized in that, The first power module uses an intrinsically safe power supply.

9. The data processing apparatus according to claim 2, characterized in that, The second power module uses an intrinsically safe power supply.

10. A data processing method, applied in the electrical control box of a coal mining machine, characterized in that, include: Convert the first DC power supply to the second DC power supply; Receive CAN signals, convert the CAN signals into RS485 signals, and send the RS485 signals to the electrical control box bus.

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