Communication system

Abstract

The invention relates to a communication system, and the system comprises an explosion-proof combination switch module which is used for obtaining original power data; at least one RS-485 signal repeater, a first communication end of each RS-485 signal repeater is connected with the explosion-proof combination switch module through a first RS-485 bus, and the RS-485 signal repeaters are used for processing the original power data and generating processed power data; and the electric power monitoring station is connected with the second communication end of each RS-485 signal repeater through a second RS-485 bus, and the electric power monitoring station is used for monitoring the operation state of the electric power equipment according to the processed electric power data. Therefore, according to the system, the signal repeater is additionally arranged in the communication line to extend and amplify the signal, so that the transmission distance of the signal is increased, and the anti-interference capability of the signal in the transmission process is improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a communication system. Background Art

[0002] Safety has always been one of the most important topics in the coal mining industry. Therefore, stable, reliable, and accurate control and operation of power equipment is the cornerstone of ensuring safety. In recent years, most coal mines in my country have gradually realized the automation control of various systems in mines. Among the many solutions for medium and long-distance communication between industrial control equipment, RS-485 system bus is widely used in industrial automation control due to its simple hardware design, convenient control, and favorable price. However, due to the long signal transmission line of the underground automation control system of coal mines, the equipment installation and cable laying are relatively concentrated, and the signal transmission is subject to more external interference, which is prone to signal attenuation, loss or mis-transmission, which seriously affects the safe operation of various automation systems in mines. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, the first object of the present invention is to provide a communication system that extends and amplifies the signal by adding a signal repeater in the communication line, thereby increasing the transmission distance of the signal and improving the anti-interference ability of the signal during the transmission process.

[0005] To achieve the above-mentioned purpose, the present invention proposes a communication system, comprising: an explosion-proof combination switch module, the explosion-proof combination switch module is used to obtain original power data; at least one RS-485 signal repeater, the first communication end of each RS-485 signal repeater is connected to the explosion-proof combination switch module through a first RS-485 bus, the RS-485 signal repeater is used to process the original power data and generate processed power data; a power monitoring station, the power monitoring station is connected to the second communication end of each RS-485 signal repeater through a second RS-485 bus, and the power monitoring station is used to monitor the operating status of the power equipment according to the processed power data.

[0006] The communication system of the embodiment of the present invention includes an explosion-proof combination switch module, at least one RS-485 signal repeater and a power monitoring station; wherein the explosion-proof combination switch module is used to obtain original power data; the first communication end of each RS-485 signal repeater is connected to the explosion-proof combination switch module through a first RS-485 bus, and the RS-485 signal repeater is used to process the original power data and generate processed power data; the power monitoring station is connected to the second communication end of each RS-485 signal repeater through a second RS-485 bus, and the power monitoring station is used to monitor the operating status of the power equipment according to the processed power data. Therefore, the system extends and amplifies the signal by adding a signal repeater in the communication line, thereby increasing the transmission distance of the signal and improving the anti-interference ability of the signal during the transmission process.

[0007] In addition, the communication system provided in the embodiment of the first aspect of the present invention may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the RS-485 signal repeater comprises:

[0009] An input interface module, composed of a first optical coupling isolation circuit, a first current resistance unit and a first filter capacitor unit, and the input interface module is used to receive the original power data sent from the explosion-proof combination switch module;

[0010] A first data processing module, composed of an operational amplifier, a resistor network unit and a second filter capacitor unit, the first data processing module is used to enhance, amplify and reshape the original power data;

[0011] The output interface module is composed of a second optical coupling isolation circuit, a second current limiting resistor unit and a third filter capacitor unit. The output interface module is used to output the processed power data to the power monitoring station.

[0012] According to one embodiment of the present invention, the power monitoring station comprises:

[0013] a second data processing module, the second data processing module being used to receive and parse the processed power data;

[0014] A monitoring and analysis module, which is used to monitor the working parameters of the power equipment in real time according to the data analyzed by the data processing unit, and to determine whether the operating status of the power equipment is normal;

[0015] An alarm module is used to send out an alarm signal when the monitoring and analysis module detects that the power equipment is operating abnormally.

[0016] According to one embodiment of the present invention, the system further comprises:

[0017] A power supply device is connected to the first power supply terminal and the second power supply terminal of each of the RS-485 signal repeaters, and the power supply device is used to supply power to each of the RS-485 signal repeaters.

[0018] According to one embodiment of the present invention, the power supply device includes:

[0019] A first power supply, wherein the first power supply is used to provide a first power supply;

[0020] A first air switch component, wherein the first air switch component is used to control the on and off of the first power supply;

[0021] A first relay is used to control switching of the first power source.

[0022] According to one embodiment of the present invention, the first relay includes a first coil and a first normally open switch; wherein,

[0023] The first coil, the first air switch component and the first power supply form a series circuit. When the first air switch component is closed, the first coil is energized and the first normally open switch is closed, so that the first power supply supplies power to the RS-485 signal repeater.

[0024] According to one embodiment of the present invention, the power supply device further includes:

[0025] A second power supply, the second power supply is used to provide a second power supply;

[0026] A second air switch component, the second air switch component is used to control the on and off of the second power supply;

[0027] a second relay, the second relay being used to control switching of the second power supply;

[0028] A normally closed switch is associated with the first relay.

[0029] According to one embodiment of the present invention, the second relay includes a second coil and a second normally open switch; wherein,

[0030] The second coil forms a series circuit with the normally closed switch, the second air switch assembly and the second power supply. When the second air switch assembly is closed, the second coil is energized and the second normally open switch is closed, so that the second power supply supplies power to the RS-485 signal repeater.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0033] Figure 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of a power supply device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] A communication system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0037] Before introducing the communication system of the embodiment of the present invention, the problems existing in the RS-485 communication process are first introduced.

[0038] Although the differential transmission method used in RS-485 communication can effectively suppress common-mode interference signals, in actual applications in coal mines, the signal transmission distance is long, there are many electrical equipment, many types of power supply voltages, many cables, and the cable wiring range is limited, resulting in an increase in external interference sources received by the system communication system, which leads to the following problems in the signal transmission process:

[0039] 1. The extension of RS-485 bus transmission distance will cause the signal to attenuate continuously, which may eventually lead to instability of the 485 bus, resulting in data loss or erroneous signal transmission.

[0040] 2. The space in mine tunnels is limited, and the distance between power cables and communication cables is relatively close. Signal interference is easily caused during signal transmission, resulting in data loss or erroneous signal transmission.

[0041] 3. Although the communication system power supply adopts a dual-circuit separate operation mode, it is unable to realize automatic switching of the dual power supplies, resulting in communication disconnection after the power supply circuit in use of the communication system is powered off, and remote control cannot be continued.

[0042] Figure 1 is a schematic diagram of a communication system according to an embodiment of the present invention.

[0043] like Figure 1As shown, the communication system of the embodiment of the present invention includes: an explosion-proof combination switch module 110 , at least one RS-485 signal repeater 120 and a power monitoring station 130 .

[0044] Among them, the explosion-proof combination switch module 110 is installed near the power equipment. The explosion-proof combination switch module 110 is used to obtain original power data, such as voltage, current, power, etc. The explosion-proof combination switch module 110 has an explosion-proof design and is suitable for environments where explosive gas or dust may exist to ensure safe operation. The first communication end of each RS-485 signal repeater 120 is connected to the explosion-proof combination switch module 110 through a first RS-485 bus. The RS-485 signal repeater 120 is used to process the original power data and generate processed power data. The power monitoring station 130 is connected to the second communication end of each RS-485 signal repeater 120 through a second RS-485 bus. The power monitoring station 130 is used to monitor the operating status of the power equipment based on the processed power data.

[0045] The present invention increases the load capacity of the RS-485 bus by adding an RS-485 signal repeater, and each additional RS-485 signal repeater 120 can increase the transmission distance of the RS-485 bus by 1200 meters.

[0046] In an embodiment of the present invention, the RS-485 signal repeater 120 includes: an input interface module, a first data processing module and an output interface module. The input interface module is composed of a first optical coupling isolation circuit, a first current resistance unit and a first filter capacitor unit, and the input interface module is used to receive the original power data sent from the explosion-proof combination switch module 110. The first data processing module is composed of an operational amplifier, a resistor network unit and a second filter capacitor unit, and the first data processing module is used to enhance, amplify and shape the original power data. The output interface module is composed of a second optical coupling isolation circuit, a second current limiting resistor unit and a third filter capacitor unit, and the output interface module is used to output the processed power data to the power monitoring station 130.

[0047] Therefore, the RS-485 signal repeater of the embodiment of the present invention adopts balanced transmission and differential reception, so it has the ability to suppress common-mode interference, enhance and amplify existing signals, and provide 600W of lightning surge protection power per line, which effectively improves the signal transmission distance, increases the number of bus network devices, and provides protection function for the signal transmission line.

[0048] In an embodiment of the present invention, the power monitoring station 130 includes: a second data processing module, a monitoring and analysis module, and an alarm module. Among them, the second data processing module is used to receive and parse the processed power data. The monitoring and analysis module is used to monitor the working parameters of the power equipment in real time according to the data parsed by the data processing unit, and to determine whether the operating status of the power equipment is normal. The alarm module is used to send an alarm signal when the monitoring and analysis module detects that the power equipment is operating abnormally.

[0049] According to one embodiment of the present invention, Figure 2 As shown, the above system also includes: a power supply device, which is connected to the first power supply 140 terminal and the second power supply 150 terminal of each RS-485 signal repeater 120, and the power supply device is used to supply power to each RS-485 signal repeater 120.

[0050] According to one embodiment of the present invention, Figure 2 As shown, the power supply device includes: a first power supply 140, a first air switch component QF1, and a first relay KM1. The first power supply 140 is used to provide a first power supply; the first air switch component QF1 is used to control the on and off of the first power supply 140. The first relay KM1 is used to control the switching of the first power supply 140.

[0051] According to one embodiment of the present invention, Figure 2 As shown, the first relay KM1 includes a first coil KM1 and a first normally open switch KM1; wherein, the first coil KM1, the first air switch component QF1 and the first power supply 140 form a series circuit. When the first air switch component QF1 is closed, the first coil KM1 is energized and the first normally open switch KM1 is closed, so that the first power supply 140 supplies power to the RS-485 signal repeater 120.

[0052] According to one embodiment of the present invention, Figure 2 As shown, the power supply device also includes: a second power supply 150, a second air switch component QF2, a second relay KM2, and a normally closed switch KM1 associated with the first relay KM1. The second power supply 150 is used to provide a second power supply. The second air switch component QF2 is used to control the on and off of the second power supply 150. The second relay KM2 is used to control the switching of the second power supply 150.

[0053] According to one embodiment of the present invention, Figure 2As shown, the second relay KM2 includes a second coil KM2 and a second normally open switch KM2; wherein, the second coil KM2, the normally closed switch KM1, the second air switch component QF2 and the second power supply 150 form a series circuit. When the second air switch component QF2 is closed, the second coil KM2 is energized and the second normally open switch KM2 is closed, so that the second power supply 150 supplies power to the RS-485 signal repeater 120.

[0054] Therefore, the RS-485 signal repeater of the embodiment of the present invention adopts an uninterruptible power supply mode. When the power supply circuit in use fails and the power is cut off, it automatically switches to the backup circuit, ensuring that when the main power supply circuit of the communication system fails, it automatically switches to the hot backup circuit to ensure that the communication system is powered and the equipment can still be remotely monitored and controlled.

[0055] In summary, the communication system of the embodiment of the present invention includes an explosion-proof combination switch module, at least one RS-485 signal repeater and a power monitoring station; wherein the explosion-proof combination switch module is used to obtain original power data; the first communication end of each RS-485 signal repeater is connected to the explosion-proof combination switch module through a first RS-485 bus, and the RS-485 signal repeater is used to process the original power data and generate processed power data; the power monitoring station is connected to the second communication end of each RS-485 signal repeater through a second RS-485 bus, and the power monitoring station is used to monitor the operating status of the power equipment according to the processed power data. Therefore, the system extends and amplifies the signal by adding a signal repeater in the communication line, thereby increasing the transmission distance of the signal and improving the anti-interference ability of the signal during the transmission process.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. A communication system, characterized in that: include: An explosion-proof combination switch module, wherein the explosion-proof combination switch module is used to obtain raw power data; at least one RS-485 signal repeater, wherein the first communication end of each of the RS-485 signal repeaters is connected to the explosion-proof combination switch module via a first RS-485 bus, and the RS-485 signal repeater is used to process the original power data to generate processed power data; A power monitoring station is connected to the second communication end of each RS-485 signal repeater through a second RS-485 bus, and is used to monitor the operating status of the power equipment based on the processed power data.

2. The system according to claim 1, characterized in that The RS-485 signal repeater includes: An input interface module, composed of a first optical coupling isolation circuit, a first current resistance unit and a first filter capacitor unit, and the input interface module is used to receive the original power data sent from the explosion-proof combination switch module; A first data processing module, composed of an operational amplifier, a resistor network unit and a second filter capacitor unit, the first data processing module is used to enhance, amplify and reshape the original power data; The output interface module is composed of a second optical coupling isolation circuit, a second current limiting resistor unit and a third filter capacitor unit. The output interface module is used to output the processed power data to the power monitoring station.

3. The system according to claim 1, characterized in that The power monitoring station comprises: a second data processing module, the second data processing module being used to receive and parse the processed power data; A monitoring and analysis module, which is used to monitor the working parameters of the power equipment in real time according to the data analyzed by the data processing unit, and to determine whether the operating status of the power equipment is normal; An alarm module is used to send out an alarm signal when the monitoring and analysis module detects that the power equipment is operating abnormally.

4. The system according to claim 1, characterized in that The system further comprises: A power supply device is connected to the first power supply terminal and the second power supply terminal of each of the RS-485 signal repeaters, and the power supply device is used to supply power to each of the RS-485 signal repeaters.

5. The system according to claim 4, characterized in that The power supply device comprises: A first power supply, the first power supply is used to provide a first power supply; A first air switch component, wherein the first air switch component is used to control the on and off of the first power supply; A first relay is used to control switching of the first power source.

6. The system according to claim 5, characterized in that The first relay includes a first coil and a first normally open switch; wherein, The first coil, the first air switch component and the first power supply form a series circuit. When the first air switch component is closed, the first coil is energized and the first normally open switch is closed, so that the first power supply supplies power to the RS-485 signal repeater.

7. The system according to claim 5, characterized in that The power supply device also includes: A second power supply, the second power supply is used to provide a second power supply; A second air switch component, the second air switch component is used to control the on and off of the second power supply; a second relay, the second relay being used to control switching of the second power supply; A normally closed switch is associated with the first relay.

8. The system according to claim 7, characterized in that The second relay includes a second coil and a second normally open switch; wherein, The second coil forms a series circuit with the normally closed switch, the second air switch assembly and the second power supply. When the second air switch assembly is closed, the second coil is energized and the second normally open switch is closed, so that the second power supply supplies power to the RS-485 signal repeater.

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