CN210724832U - Mining isolation coupler and electrical control system - Google Patents
Mining isolation coupler and electrical control system Download PDFInfo
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- CN210724832U CN210724832U CN202020181686.XU CN202020181686U CN210724832U CN 210724832 U CN210724832 U CN 210724832U CN 202020181686 U CN202020181686 U CN 202020181686U CN 210724832 U CN210724832 U CN 210724832U
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Abstract
The utility model provides a mining isolation coupler and electrical control system, include, first sender, second sender, first receiver, second receiver, first opto-isolator, second opto-isolator, first isolation power, second isolation power, first difference interface, second difference interface; the first transmitter is connected with the first receiver through a first optical coupler isolator, and the second transmitter is connected with the second receiver through a second optical coupler isolator; the first differential interface is connected with the first receiver and the second transmitter, and the second differential interface is connected with the first transmitter and the second receiver. The mining bus signal is effectively isolated by adding the optical coupling isolator between the transceivers, and particularly can be an RS-485 bus signal; meanwhile, the signal transmission of the system is still not influenced by directly removing the isolation coupler under the scene that signal isolation is not needed.
Description
Technical Field
The embodiment of the utility model provides a relate to industrial communication technical field, particularly, especially relate to a mining isolation coupler and electrical control system.
Background
The RS-485 bus is a field bus form widely adopted in the field of measurement and control, and has more applications in the field of industrial control due to the advantages of long transmission distance, high communication speed, strong common-mode interference resistance, low price and the like. In practical applications, especially for two systems at long distance, because ground loop problem needs to isolate signals, especially in complex application environment of coal industry, electrical signal isolation of two systems is almost necessary.
In the prior art, for RS-485 isolation, optical coupling isolation is conventionally performed on a TTL level between a transceiver and a micro controller Unit (MCU for short).
However, the prior art method has great limitation, and the module structure cannot be flexibly changed under the condition that signal isolation is not needed.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problems existing in the prior art, the utility model provides a mining isolation coupler and electrical control system mainly is applied to the aspect of isolation of mining RS-485 bus signal.
In order to achieve the above object, the utility model discloses a first aspect provides a mining isolation coupler, include: the device comprises a first transmitter, a second transmitter, a first receiver, a second receiver, a first optical coupler isolator, a second optical coupler isolator, a first isolation power supply, a second isolation power supply, a first differential interface and a second differential interface;
the first transmitter is connected with the first receiver through a first optical coupler isolator, and the second transmitter is connected with the second receiver through a second optical coupler isolator;
the first isolation power supply is respectively connected with the first transmitter, the second receiver, the first optical coupler isolator and the second optical coupler isolator;
the second differential interface is connected with the first transmitter and the second receiver, and the first differential interface is connected with the first receiver and the second transmitter.
Optionally, the first receiver is configured to receive a first differential signal through the first differential interface, convert the first differential signal into a first TTL signal, and transmit the TTL signal to the first optocoupler isolator;
a first optocoupler isolator for transmitting the first TTL signal to a first transmitter;
the first transmitter is used for converting the first TTL signal into a first differential signal to be transmitted;
the second receiver is used for receiving a second differential signal through a second differential interface, converting the second differential signal into a second TTL signal and transmitting the second TTL signal to the second optical coupler isolator;
the second optical coupler isolator is used for converting the second differential signal into a second TTL signal and transmitting the second TTL signal to the second transmitter;
and the second transmitter is used for converting the second TTL signal into a second differential signal to be transmitted.
Optionally, the first transmitter, the second transmitter, the first receiver, and the second receiver are RS-485 transceivers.
Optionally, the mining isolation coupler further includes: a first output pin and a second output pin;
the first receiver is connected with the first optical coupler isolator in series through a first output pin;
the second receiver is connected with the second optical coupler isolator in series through the second output pin.
Optionally, a power pin of the first optical coupler isolator is connected to a first isolation power supply, and a first capacitor is connected in parallel between the first isolation power supply and the first ground pin.
And a power supply pin of the second optical coupler isolator is connected with a second isolation power supply, and a second capacitor is connected in parallel between the second isolation power supply and a second grounding pin.
Optionally, the isolation coupler further includes: a first resistor and a second resistor;
a first resistor is connected between a second isolation power supply and an output pin of the first optical coupler isolator;
and a second resistor is connected between the first isolation power supply and the output pin of the second optical coupler isolator.
Optionally, the isolation coupler further includes: a first input resistor and a second input resistor;
the first isolation power supply is connected with the first transmitter through a first input resistor;
the second isolated power supply is connected to the second transmitter through a second input resistor.
The utility model also provides an electrical control system in a second aspect, which comprises the mining isolating coupler, the intrinsic safety equipment and the non-intrinsic safety equipment in the first aspect;
the isolation coupler, the intrinsic safety device and the non-intrinsic safety device are connected through a bus.
The utility model provides a pair of mining isolation coupler, include: the device comprises a first transmitter, a second transmitter, a first receiver, a second receiver, a first optical coupler isolator, a second optical coupler isolator, a first isolation power supply, a second isolation power supply, a first differential interface and a second differential interface; the first transmitter is connected with the first receiver through a first optical coupler isolator, and the second transmitter is connected with the second receiver through a second optical coupler isolator; the first isolation power supply is respectively connected with the first transmitter, the second receiver, the first optical coupler isolator and the second optical coupler isolator; the second differential interface is connected with the first transmitter and the second receiver, and the first differential interface is connected with the first receiver and the second transmitter. The mining bus signal is effectively isolated by adding the optical coupling isolator between the transceivers; the method can be particularly used for RS-485 bus signals, and meanwhile, the signal transmission of the system is still not influenced by directly removing the isolation coupler under the scene of no need of signal isolation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a mining isolating coupler according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mining isolating coupler according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a mining isolating coupler according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a mining isolating coupler according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a mining isolating coupler according to an embodiment of the present invention.
Detailed Description
To prior art can't change the module structure in a flexible way under the condition that does not need signal isolation, the great problem of limitation, the embodiment of the utility model provides a mining isolation coupler.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Fig. 1 is the embodiment of the utility model provides a mining isolation coupler, this mining isolation coupler as shown in fig. 1 includes: a first transmitter 101, a second transmitter 106, a first receiver 103, a second receiver 104, a first optical isolator 102, a second optical isolator 105, a first isolated power supply 107, a second isolated power supply 108, a first differential interface 110, a second differential interface 109.
Wherein the first transmitter 101 is connected to the first receiver 103 through a first optical isolator 102, and the second transmitter 106 is connected to the second receiver 104 through a second optical isolator 105.
A first isolation power supply 107 is respectively connected with the first transmitter 101, the second receiver 104, the first optical coupler isolator 102 and the second optical coupler isolator 105, and a second isolation power supply 108 is respectively connected with the second transmitter 106, the first receiver 103, the first optical coupler isolator 102 and the second optical coupler isolator 105;
the second differential interface 109 is connected to the first transmitter 101 and the second receiver 104, and the first differential interface 110 is connected to the first receiver 103 and the second transmitter 106.
It should be noted that, since the optical coupler isolator isolates the received signal, in fig. 1, the first isolation power supply 107 supplies power to the left side of the first optical coupler isolator 102, and the second isolation power supply 108 supplies power to the right side; accordingly, on the left side of the second opto-isolator 105 is powered by a first isolated power supply 107 and on the right side by a second isolated power supply 108.
It should be noted that the embodiment of the present invention provides a mining isolation coupler, which can be specifically applied between intrinsically safe devices (intrinsically safe devices) and non-intrinsically safe devices (non-intrinsically safe devices).
The intrinsic safety device, the non-intrinsic safety device and the mining isolation coupler are connected through a bus, for example, an RS-485 bus.
Specifically, when the mining isolation coupler provided by the embodiment of the present invention receives a differential signal to the left, the isolation of the signal can be performed through the first receiver 103, the first optical coupler isolator 102, and the first transmitter 101; accordingly, when the mining isolation coupler receives a rightward differential signal, the signals can be isolated through the second receiver 104, the second optical coupler isolator 105 and the second transmitter 106.
The utility model provides a pair of mining isolation coupler, include: a first transmitter 101, a second transmitter 106, a first receiver 103, a second receiver 104, a first optical isolator 102, a second optical isolator 105, a first isolated power supply 107, a second isolated power supply 108, a first differential interface 110, a second differential interface 109; wherein, the first transmitter 101 is connected with the first receiver 103 through a first optical isolator 102, and the second transmitter 106 is connected with the second receiver 104 through a second optical isolator 105; a first isolation power supply 107 is respectively connected with the first transmitter 101, the second receiver 104, the first optical coupler isolator 102 and the second optical coupler isolator 105, and a second isolation power supply 108 is respectively connected with the second transmitter 106, the first receiver 103, the first optical coupler isolator 102 and the second optical coupler isolator 105; the second differential interface 109 is connected to the first transmitter 101 and the second receiver 104, and the first differential interface 110 is connected to the first receiver 103 and the second transmitter 106. By adding the optical coupling isolator between the transceivers, the mine bus signals are effectively isolated, and meanwhile, the isolation coupler is directly removed under the scene without signal isolation, so that the signal transmission of the system is still not influenced.
It should be noted that, in the embodiment of the present invention, the first receiver 103 is configured to receive the first differential signal through the first differential interface 110, convert the first differential signal into a first TTL signal, and transmit the TTL signal to the first opto-isolator 102.
A first optocoupler isolator 102 for transmitting the first TTL signal to the first transmitter 101.
The first transmitter 101 is configured to convert the first TTL signal into a first differential signal to be transmitted.
The second receiver 104 is configured to receive the second differential signal through the second differential interface 109, convert the second differential signal into a second TTL signal, and transmit the second TTL signal to the second optical coupler isolator 105.
And a second optical coupler isolator 105, configured to convert the second differential signal into a second TTL signal, and transmit the second TTL signal to a second transmitter 106.
And a second transmitter 106, configured to convert the second TTL signal into a second differential signal to be transmitted.
Optionally, in the embodiment of the present invention, the intrinsic safety device and the non-intrinsic safety device are both capable of sending a first differential signal and a second differential signal, and what the two devices specifically send is the first differential signal or the second differential signal, which is determined by the device and the line connection manner, so that the first differential signal and the second differential signal are specifically sent by the intrinsic safety device or the non-intrinsic safety device, which is not limited by the embodiment of the present invention.
It should be noted that the first differential signal and the second differential signal are transmitted through the RS-485 bus on the intrinsically safe device and the non-intrinsically safe device.
Optionally, the first transmitter 101, the second transmitter 106, the first receiver 103, and the second receiver 104 are all RS-485 transceivers.
It should be noted that, in the present embodiment of the invention, the isolation coupler further includes: a first output pin and a second output pin. Specifically, the first receiver 103 is connected in series with the first opto-isolator 102 through a first output pin; the second receiver 104 is connected in series with a second optocoupler isolator 105 through a second output pin.
Fig. 2 is a mining isolating coupler according to another embodiment of the present invention, as shown in fig. 2, a power pin of a first optical coupling isolator 102 is connected to a first isolating power source 107, and a first capacitor C1 is connected in parallel between the first isolating power source and a first ground pin, where the first ground pin is represented as GND 1; the power pin of the second opto-isolator 105 is connected to a second isolated power supply 108 and is connected in parallel with a second capacitor C2 between the second isolated power supply and a second ground pin, denoted GND 2.
Optionally, the embodiment of the present invention provides a first electric capacity C1 specifically can be 0.1uf, correspondingly, second electric capacity C2 can be the same with first electric capacity C1 model, also can not be the same, the embodiment of the present invention does not specifically limit this.
It should be noted that, in the embodiment of the present invention, the voltage stabilizing effect can be achieved by adding the capacitor between the optical coupler isolator and the power supply pin.
As shown in fig. 3, for a mining isolation coupler provided by another embodiment of the present invention, optionally, the mining isolation coupler further includes a first resistor R1 and a second resistor R2.
Specifically, a first resistor R1 is connected between the second isolation power supply 108 and the output pin of the first opto-isolator 102; a second resistor R2 is connected between the first isolation power supply 107 and the output pin of the second opto-isolator 105.
It should be noted that, in the embodiment of the present invention, the first resistor R1 and the second resistor R2 are correspondingly added to the power pin to play a role of current limiting, so as to achieve protection of the optocoupler isolator.
As shown in fig. 4, for a mining isolation coupler provided by another embodiment of the present invention, optionally, the mining isolation coupler further includes a first input resistor R3 and a second input resistor R6. It should be noted that, in the embodiment of the present invention, the first isolation power supply 107 is connected to the first transmitter 101 through the first input resistor R3; the second isolated power supply 108 is coupled to the second transmitter 106 through a second input resistor R6.
Fig. 5 is a mining isolating coupler according to an embodiment of the present invention, and as shown in fig. 5, the first transmitter may be denoted by U3, the first optical coupler isolator may be denoted by U5, the first receiver may be denoted by U4, the second receiver may be denoted by U7, the second optical coupler isolator may be denoted by U6, and the second transmitter may be denoted by U8; ground line 1 is shown as GND1, ground line 2 is shown as GND2, and the two differential lines on the left side are respectively shown as a1 and B1; the two differential lines on the right side are respectively represented as a2 and B2, and it should be noted that the differential lines in the embodiment of the present invention are used for transmitting differential signals from devices on both sides, specifically, between an intrinsically safe device and a non-intrinsically safe device; the first isolation power supply is represented as 5V1, the second isolation power supply is represented as 5V2, and three resistors are connected in series between the first isolation power supply 5V1 on the left side and the ground line GND1, wherein the three resistors are respectively R7, R8 and R9; correspondingly, three resistors, namely R10, R11 and R12 are connected in series between the second isolation power supply 5V2 on the right side and the ground line GND 2; a resistor R4 is connected in series between the second receiver 104 and GND1, and a resistor R5 is connected in series between the second receiver 103 and GND 2. Specifically, the embodiment of fig. 5 is the same as the embodiment of fig. 1 to 4, and the comparison between the embodiments of the present invention is not repeated.
An embodiment of the utility model provides an electrical control system, this electrical control system include above-mentioned embodiment isolation coupler, this ampere of equipment, non-this ampere of equipment.
The intrinsic safety device, the non-intrinsic safety device and the mining isolation coupler are connected through a bus, for example, an RS 485-bus.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A mining isolating coupler, comprising: the device comprises a first transmitter, a second transmitter, a first receiver, a second receiver, a first optical coupler isolator, a second optical coupler isolator, a first isolation power supply, a second isolation power supply, a first differential interface and a second differential interface;
the first transmitter is connected with the first receiver through the first optical coupler isolator, and the second transmitter is connected with the second receiver through the second optical coupler isolator;
the first isolation power supply is respectively connected with the first transmitter, the second receiver, the first optical coupler isolator and the second optical coupler isolator, and the second isolation power supply is respectively connected with the second transmitter, the first receiver, the first optical coupler isolator and the second optical coupler isolator;
the second differential interface is connected to the first transmitter and the second receiver, and the first differential interface is connected to the first receiver and the second transmitter.
2. The isolating coupler of claim 1,
the first receiver is configured to receive a first differential signal through the first differential interface, convert the first differential signal into a first TTL signal, and transmit the TTL signal to the first optocoupler isolator;
the first optocoupler isolator is used for transmitting the first TTL signal to the first transmitter;
the first transmitter is used for converting the first TTL signal into a first differential signal to be transmitted;
the second receiver is configured to receive a second differential signal through the second differential interface, convert the second differential signal into a second TTL signal, and transmit the second TTL signal to the second optocoupler isolator;
the second optical coupler isolator is used for converting the second differential signal into a second TTL signal and transmitting the second TTL signal to the second transmitter;
and the second transmitter is used for converting the second TTL signal into a second differential signal to be transmitted.
3. The isolating coupler of claim 1, wherein the first transmitter, the second transmitter, the first receiver, and the second receiver are all RS-485 transceivers.
4. The isolating coupler of claim 1, further comprising: a first output pin and a second output pin;
the first receiver is connected with the first optical coupler isolator in series through the first output pin;
the second receiver is connected with the second optical coupler isolator in series through the second output pin.
5. The isolating coupler of claim 1, wherein a power pin of the first opto-isolator is connected to the first isolated power supply and a first capacitor is connected in parallel between the first isolated power supply and a first ground pin;
and a power supply pin of the second optical coupler isolator is connected with the second isolation power supply, and a second capacitor is connected in parallel between the second isolation power supply and the second grounding pin.
6. The isolating coupler of claim 1 or 5, further comprising: a first resistor and a second resistor;
the first resistor is connected between the second isolation power supply and the output pin of the first optical coupler isolator;
and the second resistor is connected between the first isolation power supply and the output pin of the second optical coupler isolator.
7. The isolating coupler of claim 1, further comprising: a first input resistor and a second input resistor;
the first isolated power supply is connected with the first transmitter through the first input resistor;
the second isolated power supply is connected to the second transmitter through the second input resistor.
8. An electrical control system comprising an isolating coupler, an intrinsically safe device, a non-intrinsically safe device as claimed in any one of claims 1 to 7;
the isolation coupler, the intrinsic safety device and the non-intrinsic safety device are connected through a bus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020181686.XU CN210724832U (en) | 2020-02-18 | 2020-02-18 | Mining isolation coupler and electrical control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020181686.XU CN210724832U (en) | 2020-02-18 | 2020-02-18 | Mining isolation coupler and electrical control system |
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| CN210724832U true CN210724832U (en) | 2020-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112118084A (en) * | 2020-09-02 | 2020-12-22 | 威胜电气有限公司 | Half-duplex differential bus isolation relay device and data line transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112118084A (en) * | 2020-09-02 | 2020-12-22 | 威胜电气有限公司 | Half-duplex differential bus isolation relay device and data line transmission system |
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