CN110086142B - MBUS node group-based protection device - Google Patents
MBUS node group-based protection device Download PDFInfo
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- CN110086142B CN110086142B CN201910339422.4A CN201910339422A CN110086142B CN 110086142 B CN110086142 B CN 110086142B CN 201910339422 A CN201910339422 A CN 201910339422A CN 110086142 B CN110086142 B CN 110086142B
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- 238000005070 sampling Methods 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/046—Signalling the blowing of a fuse
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a protection device based on an MBUS node group, which comprises a power taking circuit, a detection sampling circuit, a controller and an alarm indication circuit, wherein the power taking circuit is arranged at an input end of an MBUS bus and is used for taking power from the MBUS and supplying power to the controller, the detection sampling circuit is arranged at an output end of the MBUS bus and is used for processing MBUS bus faults, the controller is connected with the power taking circuit and the detection sampling circuit and is used for judging the MBUS bus faults, and the alarm indication circuit is arranged on the MBUS bus and is connected with the controller. The MBUS node group-based protection device is used for point protection among the acquisition panel, the temperature control valve and the concentrator in central heating, and solves the problem that the temperature control valve or the acquisition panel is in a protection state of the whole system due to artificial short circuit, so that even if the acquisition is in short circuit, the normal operation of the whole system is not affected.
Description
Technical Field
The invention relates to the technical field of heating systems, in particular to a protection device based on MBUS node groups.
Background
With the continuous progress of national economy, the country enforces household heat metering for promoting the energy saving purpose in a central heating system, and the household heat metering is often used as an important basis for settlement of heating enterprises. On the one hand, the fairness and the rationality of heat supply expense allocation can be ensured, and the household temperature regulation means that a user can realize the regulation of indoor temperature through the control of a temperature regulating valve according to the self requirement, and under a double-pipe system, the total pressure difference of a heat supply system can be kept within a given range through the temperature regulating valve, so that the heat supply system has important significance in realizing the reduction of the fuel consumption of a boiler and the reduction of the power consumption of a heat supply water pump. The current heat supply system adopts an MBUS bus, which is an important technology for digitizing data transmission of measuring instruments, and is applied to various aspects of data acquisition in the building industry and industry, and the MBUS has the advantages of large capacity, expandability, low cost, no polarity, long transmission distance and the like. When the nodes on the MBUS bus fail, the prior art adopts an MBUS concentrator, and the MBUS concentrator has a load function, an overload recovery function and a short-circuit protection function, but when a short-circuit fault occurs, the communication of the whole system is affected, and the fault cannot be positioned.
Disclosure of Invention
The invention aims to provide a protection device based on an MBUS node group, which can effectively solve the problem that the communication of the whole system is not affected when a short circuit fault occurs and can determine the fault point.
In order to achieve the above purpose, the present invention provides the following technical solutions: the protection device based on the MBUS node group comprises a power taking circuit, a detection sampling circuit, a controller and an alarm indication circuit, wherein the power taking circuit is arranged at an MBUS bus input end and used for taking power from the MBUS and supplying power to the controller, the detection sampling circuit is arranged at an MBUS bus output end and used for processing MBUS bus faults, the controller is connected with the power taking circuit and used for detecting the sampling circuit and judging the MBUS bus faults, and the alarm indication circuit is arranged on the MBUS bus and connected with the controller.
Preferably, the detection sampling circuit includes a first output circuit and a second output circuit, the first output circuit includes a first resistor R1, a first diode TVS1 and a first fuse PPTC2 which are sequentially connected in series, the second output circuit includes a second resistor R2, a second diode TVS2 and a second fuse PPTC1 which are sequentially connected in series, a third resistor R3 and a fourth resistor R4 are connected in series, one end of the third resistor R3 is connected between the first resistor R1 and the first diode TVS1, one end of the fourth resistor R4 is connected between the second resistor R2 and the second diode TVS2, and a controller is connected between the third resistor R3 and the fourth resistor tvr 4.
Preferably, the alarm indication circuit comprises a fifth resistor R10, a sixth resistor R11, a seventh resistor R12, a first light emitting diode LED1 connected in series with the fifth resistor R10, a second light emitting diode LED2 connected in series with the sixth resistor R11, and a third light emitting diode LED3 connected in series with the seventh resistor R12, which are respectively connected with the controller.
According to the technical scheme, the invention has the following beneficial effects:
The protection device based on the MBUS node group is used for point protection among collectors, temperature control valves and concentrators IN central heating, solves the problem that the temperature control valves or collectors are IN a protection state of entering of the whole system due to artificial short circuit, adopts a detection sampling circuit to judge the fault of the MBUS bus and then automatically cuts off the output end of the MBUS bus, so that even if the collectors are IN short circuit, the normal operation of the whole system is not affected, and IN addition, the controller can detect the state of MCU_IN, alarm and position the fault of which node.
Drawings
FIG. 1 is a schematic diagram of a protection device according to the present invention;
FIG. 2 is a schematic diagram of the protection device of the present invention installed on a system;
FIG. 3 is a schematic diagram of a detection sampling circuit according to the present invention;
FIG. 4 is a schematic diagram of a power circuit according to the present invention;
FIG. 5 is a schematic diagram of a controller according to the present invention;
FIG. 6 is a schematic diagram of the alarm indication circuit of the present invention.
In the figure: 1. a power take-off circuit; 2. a detection sampling circuit; 201. a first output circuit; 202. a second output circuit; 3. a controller; 4. and an alarm indication circuit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The controller (MCU) 3 used in this embodiment is model MKE02Z32VFM4, and the manufacturer is Feishar.
Referring to fig. 1-6, the present invention provides a technical solution: the protection device based on the MBUS node group comprises a power taking circuit 1, a detection sampling circuit 2, a controller 3 and an alarm indication circuit 4, wherein the power taking circuit 1 is arranged at an MBUS bus input end and is used for taking power from the MBUS and supplying power to the controller, the detection sampling circuit 2 is arranged at an MBUS bus output end and is used for processing MBUS bus faults, the controller 3 is connected with the power taking circuit and the detection sampling circuit and is used for judging the MBUS bus faults, and the alarm indication circuit 4 is arranged on the MBUS bus and is connected with the controller.
As shown in fig. 4, the power taking circuit takes power from the MBUS bus, connects the rectifying diode D1 and the rectifying diode D2 after passing through the third fuse F1, and then enters the third VIN pin of the chip U3 after passing through the backflow preventing diode D9; the resistor R20 and the resistor R24 divide the rectified voltage, then the rectified voltage enters a fourth VIN pin of the U3 through a backflow prevention two-pipe D11, and the U3 chip feeds back and outputs a 5V power supply through the resistor R21 and the resistor R22 to supply power for the controller.
As shown IN fig. 3, the detection sampling circuit 2 includes a first output circuit 201 and a second output circuit 202, the first output circuit includes a first resistor R1, a first diode TVS1 and a first fuse PPTC2 that are sequentially connected IN series, the second output circuit includes a second resistor R2, a second diode TVS2 and a second fuse PPTC1 that are sequentially connected IN series, a third resistor R3 and a fourth resistor R4 are serially connected, one end of the third resistor R3 is connected between the first resistor R1 and the first diode TVS1, one end of the fourth resistor R4 is connected between the second resistor R2 and the second diode TVS2, and a junction point between the third resistor R3 and the fourth resistor tvr 4 is connected to an AD sampling port mcu_in of the controller.
As shown in fig. 6, the alarm indication circuit 4 includes a fifth resistor R10, a sixth resistor R11, a seventh resistor R12, a first light emitting diode LED1 connected in series with the fifth resistor R10, a second light emitting diode LED2 connected in series with the sixth resistor R11, and a third light emitting diode LED3 connected in series with the seventh resistor R12, respectively, and the other ends of the LEDs 1,2, and 3 are Grounded (GND).
The working process comprises the following steps: the method comprises the steps that power is taken from the MBUS and then supplied to the MCU, the MCU judges the state on the MBUS bus by sampling the state change of MCU_IN, when the output end (MBUS-OUT 1 or MBUS-OUT 2) of the MBUS bus is IN short circuit, the PPTC1 or PPTC2 on the first output circuit and the second output circuit is disconnected, and after the disconnection, the output end of the MBUS bus can be disconnected, so that the communication of the MBUS (MBUS-IN 1 and MBUS-IN 2) of the input end of the MBUS bus is not influenced; when the positive output end (MBUS-OUT 1) of the MBUS bus is disconnected, the state of MCU_IN is changed, the AD sampling value is changed from large to small, when the negative output end (MBUS-OUT 2) of the MBUS bus is disconnected, the AD sampling value is changed from small to large, when the positive output end and the negative output end of the MBUS bus are both disconnected, the AD sampling value is changed from large to small, the state change of MCU_IN is detected by the MCU (the MCU is IN analog-to-digital control, an analog signal and a digital signal are used for analog sampling of the MCU_IN pin, when the sampling state is changed, judgment is carried OUT according to the trend of sampling change), and an alarm indication circuit is controlled to alarm; when the MBUS input end is short-circuited, the concentrator finishes short-circuit protection and alarm.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A MBUS node group-based protection device, comprising:
The power taking circuit (1) is arranged at the input end of the MBUS bus and is used for taking power from the MBUS and supplying power to the controller;
The detection sampling circuit (2) is arranged at the output end of the MBUS bus and is used for processing the fault of the MBUS bus, the detection sampling circuit (2) comprises a first output circuit (201) and a second output circuit (202), the first output circuit comprises a first resistor R1, a first diode TVS1 and a first fuse PPTC2 which are sequentially connected in series, the second output circuit comprises a second resistor R2, a second diode TVS2 and a second fuse PPTC1 which are sequentially connected in series, a third resistor R3 and a fourth resistor R4 are connected in series, one end of the third resistor R3 is connected between the first resistor R1 and the first diode TVS1, one end of the fourth resistor R4 is connected between the second resistor R2 and the second diode TVS2, and a controller is connected between the third resistor R3 and the fourth resistor R4;
The controller (3) is connected with the circuit taking circuit and the detection sampling circuit and is used for judging MBUS bus faults; and
And an alarm indication circuit (4) which is arranged on the MBUS bus and connected with the controller.
2. The MBUS node group-based protection device according to claim 1, characterized in that: the alarm indication circuit (4) comprises a fifth resistor R10, a sixth resistor R11, a seventh resistor R12, a first Light Emitting Diode (LED) 1 connected with the fifth resistor R10 in series, a second Light Emitting Diode (LED) 2 connected with the sixth resistor R11 in series and a third Light Emitting Diode (LED) 3 connected with the seventh resistor R12 in series, wherein the fifth resistor R10, the sixth resistor R11, the seventh resistor R12, the first Light Emitting Diode (LED) 1 connected with the fifth resistor R10 in series are respectively connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339422.4A CN110086142B (en) | 2019-04-25 | 2019-04-25 | MBUS node group-based protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339422.4A CN110086142B (en) | 2019-04-25 | 2019-04-25 | MBUS node group-based protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110086142A CN110086142A (en) | 2019-08-02 |
| CN110086142B true CN110086142B (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910339422.4A Active CN110086142B (en) | 2019-04-25 | 2019-04-25 | MBUS node group-based protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110086142B (en) |
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| CN102496904A (en) * | 2011-12-20 | 2012-06-13 | 吴明星 | Self-powered communication-bus short-circuit protection method |
| CN105720683A (en) * | 2014-12-04 | 2016-06-29 | 天津市品通电力科技有限公司 | Device for intelligently selecting and inspecting onsite bus of electric power meter |
| CN206922424U (en) * | 2017-07-06 | 2018-01-23 | 深圳市雷赛智能控制股份有限公司 | Protection circuit and motion control bus module |
| CN210111582U (en) * | 2019-04-25 | 2020-02-21 | 瑞纳智能设备股份有限公司 | Protection device based on MBUS node crowd |
Family Cites Families (9)
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| DE59808141D1 (en) * | 1997-09-30 | 2003-06-05 | Siemens Ag | Residual current protection device |
| JP2007306289A (en) * | 2006-05-11 | 2007-11-22 | Nissan Motor Co Ltd | Disconnection detecting device and disconnection detecting method for multiplex communication bus |
| CN201270088Y (en) * | 2008-10-23 | 2009-07-08 | 长沙威胜信息技术有限公司 | RS-485 meter reading communication circuit |
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| GB201616027D0 (en) * | 2016-09-21 | 2016-11-02 | Rolls-Royce Ltd | Electrical fault detection method |
| CN206727631U (en) * | 2017-04-17 | 2017-12-08 | 积成电子股份有限公司 | A kind of MBUS Host Protections circuit |
| CN108989910A (en) * | 2018-09-07 | 2018-12-11 | 瑞纳智能设备股份有限公司 | A kind of low-power consumption bus takes electric MBUS communication interface circuit |
| CN109193571B (en) * | 2018-09-29 | 2024-03-12 | 江苏斯菲尔电气股份有限公司 | Bus power failure monitoring protection circuit |
| CN208754183U (en) * | 2018-10-17 | 2019-04-16 | 威胜集团有限公司 | Power circuit and its indoor display unit based on MicroUSB power supply |
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2019
- 2019-04-25 CN CN201910339422.4A patent/CN110086142B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201290006Y (en) * | 2008-10-28 | 2009-08-12 | 内江电业局 | RS485 interface fine isolation protection device |
| CN102496904A (en) * | 2011-12-20 | 2012-06-13 | 吴明星 | Self-powered communication-bus short-circuit protection method |
| CN105720683A (en) * | 2014-12-04 | 2016-06-29 | 天津市品通电力科技有限公司 | Device for intelligently selecting and inspecting onsite bus of electric power meter |
| CN206922424U (en) * | 2017-07-06 | 2018-01-23 | 深圳市雷赛智能控制股份有限公司 | Protection circuit and motion control bus module |
| CN210111582U (en) * | 2019-04-25 | 2020-02-21 | 瑞纳智能设备股份有限公司 | Protection device based on MBUS node crowd |
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| CN110086142A (en) | 2019-08-02 |
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