CN204807614U - Digital little current sensor of direct current that opens and shuts - Google Patents
Digital little current sensor of direct current that opens and shuts Download PDFInfo
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- CN204807614U CN204807614U CN201520479048.5U CN201520479048U CN204807614U CN 204807614 U CN204807614 U CN 204807614U CN 201520479048 U CN201520479048 U CN 201520479048U CN 204807614 U CN204807614 U CN 204807614U
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Abstract
The embodiment of the utility model discloses digital little current sensor of direct current that opens and shuts, include: casing and iron core: the iron core set up in in the casing, but the casing is the open -close type structure, the iron core is provided with the first iron core body and the second iron core body, the first iron core body and the second iron core body are in correspond when the casing opens and shuts and part and meet, and, set up in inside little current detection circuit of direct current and the control circuit of casing, wherein: the little current detection circuit's of direct current output with control circuit's input is connected, control circuit is provided with digital quantity communication circuit, digital quantity communication circuit is connected and/or wireless connection with upper electromechanics. On the basis of realizing the little current monitoring of direct current, avoided owing to the installation, change and the power failure during the maintenance sensor, to dc supply electrical equipment's in the transformer substation influence and the loss that causes.
Description
Technical field
The utility model relates to DC weak current sensor technical field, more particularly, relate to a kind of digital can folding DC weak current sensor.
Background technology
Transformer station is voltage of transformation in electric system, acceptance and distribution electric energy, the flow direction of control electric power and the important electric power facility of adjustment voltage.The reliability service of transformer station's less trouble is related to the stability of electric power supply, thus seems particularly important for the maintenance technology such as leakage current detect of transformer station.
Leakage current detect can prevent the decreasing insulating of transformer station's positive and negative feeder line, and existing leakage current detect is realized by DC weak current sensor.In transformer station direct current system, positive negative branch feeder line passes sensor according to certain orientation.When straight-flow system is normally run, the positive negative branch feeder line DC leakage current that sensor detects is zero; When a certain bar branch resistance formula ground connection, sensor can sense the DC leakage current of positive negative branch feeder line, can calculate the insulation resistance of this branch road according to the size of certain branch road DC leakage current, thus can judge the concrete branch road declined that insulate.
And existing DC weak current sensor is when breaking down, need the direct current supply electrical equipment power failure maintenance and installation at place, and for direct current supply electrical equipment in some transformer station, have a power failure and will cause serious financial consequences.
Utility model content
In view of this, the utility model provide a kind of digital can folding DC weak current sensor, to realize direct current supply electrical equipment under not power-off condition, complete the technical purpose of DC weak current sensor maintenance and installation.
A kind of digital can folding DC weak current sensor, comprising: housing and iron core:
Described iron core is arranged in described housing, and described housing is opening and closing type structure;
Described iron core is provided with the first iron-core workpiece and the second iron-core workpiece, and described first iron-core workpiece and the second iron-core workpiece are corresponding when described housing folding to be separated and connects;
And,
Be arranged at DC micro-electric current detection circuit and the control circuit of described enclosure interior, wherein:
The output terminal of described DC micro-electric current detection circuit is connected with the input end of described control circuit;
Described control circuit is provided with digital quantity communicating circuit, and described digital quantity communicating circuit is electrically connected and/or wireless connections with host computer.
Preferably, described DC micro-electric current detection circuit comprises: the self-maintained circuit connected successively, signal filter circuit, ratio discharge circuit and difference ratio regulating circuit.
Preferably, described control circuit is also provided with analog quantity acquisition circuit:
Described analog quantity acquisition circuit comprises the sampling reference circuit, micro voltage ratio discharge circuit and the CPU minimum system circuit that connect successively;
Described digital quantity communicating circuit is electrically connected and/or wireless connections with described CPU minimum system circuit.
As can be seen from above-mentioned technical scheme, described in the utility model digital can folding DC weak current sensor, be provided with the housing and iron core that all can realize folding, described positive negative branch feeder line is by opening the mode of described housing and described iron core through described DC weak current sensor, described DC weak current sensor can Real-time Collection uploading with digital communication, on the basis realizing the monitoring of DC micro-electric stream, avoid due to install, change and maintenance sensor time power failure, on the impact of direct current supply electrical equipment in transformer station and the loss that causes.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.Apparently, the accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is digital disclosed in the utility model embodiment can the housing of folding DC weak current sensor and core structure schematic diagram;
Fig. 2 is digital disclosed in the utility model embodiment can the connecting structure for electrical equipment schematic diagram of folding DC weak current sensor.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provide a kind of digital can folding DC weak current sensor, to realize direct current supply electrical equipment under not power-off condition, complete the technical purpose of DC weak current sensor maintenance and installation.
Fig. 1 show a kind of digital can folding DC weak current sensor, comprising:
Housing 1 and iron core 2:
Described iron core 1 is arranged in described housing, and described housing is opening and closing type structure;
Described iron core 2 is provided with the first iron-core workpiece and the second iron-core workpiece, and described first iron-core workpiece and the second iron-core workpiece are corresponding when described housing folding to be separated and connects.
Described positive negative branch feeder line by open described housing 1 and described iron core 2 mode through described DC weak current sensor, install, change and maintenance sensor time realize not power failure operation.
As shown in Figure 2, this digitally can also comprise by folding DC weak current sensor:
Be arranged at DC micro-electric current detection circuit 3 and the control circuit 4 of described housing 1 inside, wherein:
The output terminal of described DC micro-electric current detection circuit 3 is connected with the input end of described control circuit 4;
Described DC micro-electric current detection circuit 3 is electrically connected and/or wireless connections with described control circuit 4;
Described DC micro-electric current detection circuit 3 comprises: the self-maintained circuit 31 connected successively, signal filter circuit 32, ratio discharge circuit 33 and difference ratio regulating circuit 34;
The form that described self-maintained circuit 31 is modulated by magnetic, iron core applies a kind of Sasser and extracts with this DC micro-electric stream signal that iron core senses;
Described signal filter circuit 32 pairs of self-maintained circuits 31 produce simulating signal and carry out preliminary filtering operation, filtering clutter and other interference wave;
The simulation tiny signal that described ratio discharge circuit 33 and difference ratio regulating circuit 34 pairs of signal filter circuits 32 produce carries out scale amplifying and difference proportion adjustment successively.
Signal after the conditioning that described DC micro-electric current detection circuit 3 exports is delivered to described control circuit 4.Described control circuit 4 is provided with digital quantity communicating circuit 41, and described digital quantity communicating circuit 41 is electrically connected and/or wireless connections with host computer.
Described control circuit 4 is provided with analog quantity acquisition circuit 42.
Described analog quantity acquisition circuit 42 comprises the sampling reference circuit 43, micro voltage ratio discharge circuit 44 and the CPU minimum system circuit 45 that connect successively;
Described digital quantity communicating circuit 41 is electrically connected and/or wireless connections with described CPU minimum system circuit 45.
Described sampling reference circuit 43 provides DC+2.5V voltage reference to be used for weighing signal to be sampled for AD samples;
Described micro voltage ratio discharge circuit 44 will carry out further rectification from described DC micro-electric current detection circuit 3, regulate, be enlarged into a usable direct current voltage signal can sampled for AD;
Described CPU minimum system circuit 45 utilizes inner AD sampling circuit, gather described sampling reference circuit 43 and described micro voltage ratio discharge circuit 44 two-way d. c. voltage signal carries out analyzing and processing, and sensor is carried out to drift correction, carries out the operations such as fixed value adjusting to sensor;
Described digital quantity communicating circuit 41 carries out communication with host computer, thus realize host computer with the mode of communication can obtain sensor sensing to micro-electric current concrete numerical value (mA) (detecting the DC leakage current numerical value in-20mA-100mA scope), avoid on-the-spotly running the interference of interference to sampled data, as preferably, described digital quantity communicating circuit 41 can be preferably RS485 communication bus circuit, does not limit to.
In sum:
The digital of the utility model embodiment can folding DC weak current sensor, be provided with the housing and iron core that all can realize folding, described positive negative branch feeder line is by opening the mode of described housing and described iron core through described DC weak current sensor, described DC weak current sensor can Real-time Collection uploading with digital communication, on the basis realizing the monitoring of DC micro-electric stream, avoid due to install, change and maintenance sensor time power failure, on the impact of direct current supply electrical equipment in transformer station and the loss that causes.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the utility model embodiment, can realize in other embodiments.Therefore, the utility model embodiment can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. digital can a folding DC weak current sensor, it is characterized in that, comprising: housing and iron core:
Described iron core is arranged in described housing, and described housing is opening and closing type structure;
Described iron core is provided with the first iron-core workpiece and the second iron-core workpiece, and described first iron-core workpiece and the second iron-core workpiece are corresponding when described housing folding to be separated and connects;
And,
Be arranged at DC micro-electric current detection circuit and the control circuit of described enclosure interior, wherein:
The output terminal of described DC micro-electric current detection circuit is connected with the input end of described control circuit;
Described control circuit is provided with digital quantity communicating circuit, and described digital quantity communicating circuit is electrically connected and/or wireless connections with host computer.
2. digital as claimed in claim 1 can folding DC weak current sensor, it is characterized in that,
Described DC micro-electric current detection circuit comprises: the self-maintained circuit connected successively, signal filter circuit, ratio discharge circuit and difference ratio regulating circuit.
3. digital as claimed in claim 1 or 2 can folding DC weak current sensor, it is characterized in that, described control circuit is also provided with analog quantity acquisition circuit:
Described analog quantity acquisition circuit comprises the sampling reference circuit, micro voltage ratio discharge circuit and the CPU minimum system circuit that connect successively;
Described digital quantity communicating circuit is electrically connected and/or wireless connections with described CPU minimum system circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520479048.5U CN204807614U (en) | 2015-07-03 | 2015-07-03 | Digital little current sensor of direct current that opens and shuts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520479048.5U CN204807614U (en) | 2015-07-03 | 2015-07-03 | Digital little current sensor of direct current that opens and shuts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204807614U true CN204807614U (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520479048.5U Expired - Fee Related CN204807614U (en) | 2015-07-03 | 2015-07-03 | Digital little current sensor of direct current that opens and shuts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204807614U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291033A (en) * | 2016-10-26 | 2017-01-04 | 绵阳市维博电子有限责任公司 | A kind of opening and closing type current sensor magnetic core fixed structure and core assembly |
| CN110873828A (en) * | 2018-08-31 | 2020-03-10 | 株洲中车时代电气股份有限公司 | DC circuit monitoring system for railway passenger vehicle |
| CN113608005A (en) * | 2021-07-29 | 2021-11-05 | 武汉华仪智能设备有限公司 | Bypass current real-time monitoring device |
-
2015
- 2015-07-03 CN CN201520479048.5U patent/CN204807614U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291033A (en) * | 2016-10-26 | 2017-01-04 | 绵阳市维博电子有限责任公司 | A kind of opening and closing type current sensor magnetic core fixed structure and core assembly |
| CN110873828A (en) * | 2018-08-31 | 2020-03-10 | 株洲中车时代电气股份有限公司 | DC circuit monitoring system for railway passenger vehicle |
| CN113608005A (en) * | 2021-07-29 | 2021-11-05 | 武汉华仪智能设备有限公司 | Bypass current real-time monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hebei province Baoding City Xiangyang North 071000 Street No. 2999 Patentee after: Hebei Bo for electrical Limited by Share Ltd Address before: Hebei province Baoding City Xiangyang North 071000 Street No. 2999 Patentee before: Hebei Bowei Electric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20210703 |