Mine rs485 signal repeater

Abstract

The application provides a mine-used RS485 signal repeater, which comprises a first signal end, a second signal end, a first power module and a second power module, and an isolating switch, and the first signal end and the second signal end are connected through an optical coupling isolation chip, the first signal end and the second signal end are used for receiving a control signal and converting the control signal, the first power module and the second power module are respectively connected with the first signal end and the second signal end, the first power module and the second power module are respectively used for supplying power for the first signal end and the second signal end, the isolating switch is connected with the first power module and the second power module, and the isolating switch is used for realizing connection or isolation between the first power module and the second power module, and the power slow start module is connected with the first power module and the second power module, and the power slow start module is used for realizing slow start of the first power module and the second power module. The application fully considers the essential safety requirement of a coal mine, and can meet the requirement of a special environment in a coal mine on an electrical equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine safety, in particular to a mine RS485 signal repeater. BACKGROUND

[0002] With the development of coal mine monitoring system, the monitoring network composed of RS-485 communication interface has been widely applied in coal mine power, safety and other monitoring systems. Due to the particularity of the underground environment, the RS-485 signal output by the general equipment cannot meet the requirements of the coal mine underground, so it is necessary to isolate the signal provided internally and the signal output externally, that is, to use RS-485 isolation repeater.

[0003] Due to the complexity of the underground environment and the long communication distance, if the signal repeater needs to access the power supply side of the terminal equipment, the signal repeater power supply short circuit situation may occur, which endangers the entire communication network and seriously affects the coal mine power, safety and other monitoring systems. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art.

[0005] To this end, the purpose of the present application is to provide a mine RS485 signal repeater, which solves the problem that the existing signal repeater is prone to signal repeater power supply short circuit situation when accessing the power supply side of the terminal equipment, endangers the entire communication network, and realizes full consideration of the intrinsic safety requirements of coal mines and meets the requirements of electrical equipment in the special environment of coal mine underground.

[0006] To achieve the above purpose, the embodiment of the present application provides a mine RS485 signal repeater, which comprises: a first signal end and a second signal end, the first signal end and the second signal end are connected through an optical coupling isolation chip, the first signal end and the second signal end are used for receiving a control signal and converting the control signal; a first power module and a second power module, the first power module and the second power module are connected to the first signal end and the second signal end respectively, the first power module and the second power module are used for supplying power to the first signal end and the second signal end respectively; an isolation switch, the isolation switch is connected to the first power module and the second power module, and is used for realizing the connection or isolation between the first power module and the second power module; a power supply slow start module, the power supply slow start module is connected to the first power module and the second power module, and is used for realizing the slow start of the first power module and the second power module.

[0007] The mine RS485 signal repeater of the embodiment of the present application isolates the power supply of the first signal end and the second signal end of the signal repeater by using the isolation switch, avoids the occurrence of short circuit situation, and also avoids endangering the entire communication network, which plays a good protection role for the communication network and its equipment.

[0008] Optionally, in one embodiment of the present application, the opto-coupler isolation chip comprises a first opto-coupler isolation chip and a second opto-coupler isolation chip, the first opto-coupler isolation chip is connected to the first signal end transmitting end and the transceiver control end, the second opto-coupler isolation chip is connected to the second signal end transmitting end and the transceiver control end, the opto-coupler isolation chip is used to realize one-way transmission of signals between the first signal end and the second signal end.

[0009] Optionally, in one embodiment of the present application, the first signal end and the second signal end comprise a surge protection circuit and an anti-reflection resistor.

[0010] Optionally, in one embodiment of the present application, the signal repeater comprises an uplink transmission state and a downlink transmission state, and the first signal end is specifically used for:

[0011] When the signal repeater is in the uplink transmission state, if it is detected that there is data transmission on the differential signal of the connected pin bus, the data is received bit by bit and converted to TTL level, and is output to the second signal end through the opto-coupler isolation chip;

[0012] The second signal end is specifically used for:

[0013] When the signal repeater is in the uplink transmission state, the TTL level signal output by the opto-coupler isolation chip is received, which is converted into an RS485 signal and the data is output bit by bit.

[0014] Optionally, in one embodiment of the present application, the isolating switch is specifically used for:

[0015] When the signal repeater is working normally, the power module connecting the first signal end and the second signal end makes the signal repeater receive and send control signals;

[0016] When the signal repeater accesses the terminal device side power supply, the power module of the first signal end and the second signal end is isolated.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A structural schematic diagram of a mine-used RS485 signal repeater provided by Embodiment One of the present application;

[0020] Figure 2 A circuit structural schematic diagram of the mine-used RS485 signal repeater of the present application.

[0021] Figure 3 This is a circuit diagram of the signal terminal and optocoupler isolation chip of the signal repeater in an embodiment of this application.

[0022] Figure 4 This is a circuit diagram of the power module according to an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the soft-start circuit according to an embodiment of this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0025] The following description, with reference to the accompanying drawings, describes an embodiment of a mining RS485 signal repeater.

[0026] Figure 1 This is a schematic diagram of the structure of a mining RS485 signal repeater provided in Embodiment 1 of this application.

[0027] like Figure 1 As shown, the mining RS485 signal repeater includes:

[0028] The first signal terminal and the second signal terminal are connected through an optocoupler isolation chip. The first signal terminal and the second signal terminal are used to receive control signals and convert control signals.

[0029] A first power module and a second power module are respectively connected to a first signal terminal and a second signal terminal, and the first power module and the second power module are used to supply power to the first signal terminal and the second signal terminal, respectively.

[0030] The isolating switch connects the first power module and the second power module, and is used to realize the connection or isolation between the first power module and the second power module;

[0031] Power soft start module ( Figure 1 (Not specified in the text) The power soft start module is connected to the first power module and the second power module, and is used to realize the soft start of the first power module and the second power module.

[0032] The mine RS485 signal repeater provided in the embodiment of the application isolates the power supply of the first signal end and the second signal end of the signal repeater by using the isolating switch, avoids the occurrence of short circuit, avoids endangering the entire communication network, and plays a good protection role on the communication network and the equipment thereof. Figure 2 , Figure 2 The power supply module 1 and the power supply module 2 are a first power supply module and a second power supply module.

[0033] Optionally, in one embodiment of the application, the transmitting end of the first signal end is connected with the receiving end of the second signal end, and the receiving end of the first signal end is connected with the transmitting end of the second signal end; and a pair of optical coupling isolation chips are connected with the transmitting end and the transceiving control end of the first signal end and the second signal end respectively, and are used for realizing one-way transmission of signals between the first signal end and the second signal end.

[0034] Optionally, in one embodiment of the application, the repeater is divided into two states of idle and data transmission, and the data transmission format is usually a start bit, a data bit, a parity check bit and a stop bit. When idle, the transmitting end is high level, and when there is data, the bus jumps from high level to low level, and the low level is used as the start bit.

[0035] The signal 1 end and the signal 2 end of the signal repeater include a surge protection circuit and an anti-reverse diode. The RS-485 communication circuit composed of the automatic transceiving control RS485 chip automatically switches the transceiving mode of the RS485 communication.

[0036] Optionally, in one embodiment of the application, the optical coupling isolation chip is used for realizing communication isolation of the signal repeater, and specifically:

[0037] The repeater is divided into two states of uplink transmission and downlink transmission. When uplink transmission, the RS-485 transceiving chip U1 detects that the differential signal on the bus connected with the A1 and B1 pins has data transmission, receives the data bit by bit and converts it into a TTL level, the TTL level is output to the U2 chip through optical coupling isolation, and the U2 chip converts the TTL level signal output by the optical coupling into an RS485 signal and outputs the data bit by bit. The downlink mode is the same. The circuit diagram of the signal end of the signal repeater and the optical coupling isolation chip is as follows Figure 3 .

[0038] Optionally, in one embodiment of the application, the isolating switch is used for realizing power supply isolation of the signal repeater, and specifically:

[0039] The first signal end and the second signal end of the signal repeater are connected to the corresponding first power module and the second power module respectively, and the first power module and the second power module are connected or isolated by an isolating switch. When the signal repeater works normally, the isolating switch connects the power supply of the first signal end and the second signal end, and the mine-used RS485 signal repeater receives and sends control signals; when the signal repeater is connected to the power supply of the terminal device side, the isolating switch isolates the power supply of the first signal end and the second signal end to avoid short circuit, so that the signal repeater meets the requirements of electrical equipment in the special environment of the coal mine. The power module circuit diagram of the mine-used RS485 signal repeater is as follows Figure 4 , Figure 4 The first power module and the second power module are the first power module 1 and the second power module 2.

[0040] The power slow start module is used to realize slow start of the power supply of the signal repeater, and specifically:

[0041] A DC / DC module is used on the single board to convert 12V, 18V and 24V power supplies into 5V sub-power supplies required by the single board. Because the input voltage is high, and there is a large capacitor in the power supply circuit for filtering and preventing DIP, when the single board is inserted and powered on, it will cause an impact on the -48V power supply, and the instantaneous large current will cause the -48V power supply voltage to drop, which may affect the normal work of other single boards; at the same time, due to the reason of instantaneous large current, obvious sparking phenomenon will occur on the connector when the single board is inserted, which will cause electromagnetic interference and corrosion to the connector. In order to avoid the above phenomenon, the -48V power supply power supply single board needs to be "slowly" powered on. The principle diagram of the slow start circuit is as follows Figure 5 .

[0042] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0043] Moreover, the terms "first", "second", "third", etc. are used herein only to describe different steps or categories of steps in a claim for patent purposes, and are not to be construed as indicating or implying relative importance of one step to another or a quantity of steps. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0044] Any process or method descriptions or blocks in flow charts herein and elsewhere can be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process, and alternate implementations are possible. In some embodiments, the processes or methods described in flow charts herein and elsewhere can be tailored by reordering steps and / or adding or omitting one or more of the described steps, and the order of the steps can or can not be specifically mentioned or critical. One of ordinary skill in the art will recognize that the steps in the processes or methods described herein and elsewhere can be implemented by processor-executable code stored on a computer-readable medium, which can be incorporated in software, applied to reconfigurable logic within a general purpose computer, or implemented in other forms, either directly or indirectly.

[0045] Logic and / or steps represented in flow charts herein and elsewhere can be embodied in computer-readable media, for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions, or a combination of both. In the context of this specification, a "computer-readable medium" can be any means that can contain, store, communicate, propagate or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can specifically include a computer storage medium. More specific examples (a non-exhaustive list) of the computer storage medium include the following: an electronic connection having one or more wires (electronic devices), a portable computer diskette (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CDROM). Additionally, a computer-readable medium can even be paper or another suitable medium upon which the program can be printed, as the program can be electronically captured, for example by optically scanning the paper or other suitable medium, then electronically converted into a form that can be edited, compiled, or interpreted, or otherwise processed in electronic form into an executable form suitable for use by or in connection with an instruction execution system, apparatus, or device.

[0046] It should be understood that parts of the present application can be realized in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be realized as software or firmware stored in a memory and executed by a suitable instruction execution system. As such, if realized in hardware, and in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0047] Those skilled in the art can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing relevant hardware, and the programs can be stored in a computer readable storage medium, and when the programs are executed, one or a combination of the steps of the method embodiments is included.

[0048] In addition, each functional unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software functional module. The integrated module, if realized in the form of a software functional module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0049] The above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A mine-used RS485 signal repeater, characterized in that, The application relates to a signal repeater. The signal repeater comprises a first signal end and a second signal end, the first signal end and the second signal end are connected through an optical coupling isolation chip, the first signal end and the second signal end are used for receiving a control signal and converting the control signal; The signal repeater further comprises a first power module and a second power module, the first power module and the second power module are respectively connected to the first signal end and the second signal end, and the first power module and the second power module are respectively used for supplying power to the first signal end and the second signal end; The signal repeater further comprises an isolating switch, the isolating switch is connected to the first power module and the second power module, and the isolating switch is used for realizing connection or isolation between the first power module and the second power module; The signal repeater further comprises a power slow start module, the power slow start module is connected to the first power module and the second power module, and the power slow start module is used for realizing slow start of the first power module and the second power module. The isolating switch is specifically used for connecting the power modules of the first signal end and the second signal end when the signal repeater normally works, so that the signal repeater receives and transmits the control signal. The power modules of the first signal end and the second signal end are isolated when the signal repeater accesses a terminal equipment side power supply. The optical coupling isolation chip comprises a first optical coupling isolation chip and a second optical coupling isolation chip, the first optical coupling isolation chip is connected to a transmitting end and a receiving-transmitting control end of the first signal end, the second optical coupling isolation chip is connected to a transmitting end and a receiving-transmitting control end of the second signal end, and the optical coupling isolation chip is used for realizing one-way transmission of signals between the first signal end and the second signal end.

2. The mine RS485 signal repeater of claim 1, wherein, The first signal end and the second signal end comprise a surge protection circuit and an anti-reflection resistor.

3. The mine RS485 signal repeater of claim 1, wherein, The signal repeater comprises an uplink transmission state and a downlink transmission state, and the first signal end is specifically used for:

4. The mine RS485 signal repeater of claim 2, wherein, When the signal repeater is in the uplink transmission state, if differential signals on a connected pin bus are detected to have data transmission, the data are received bit by bit and converted into TTL level, and the TTL level signals are output to the second signal end through the optical coupling isolation chip. The second signal end is specifically used for: When the signal repeater is in the uplink transmission state, the TTL level signals output by the optical coupling isolation chip are received, the TTL level signals are converted into RS485 signals, and the data are output bit by bit. ​

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