CN201654083U - Shielding box for weak-voltage detector - Google Patents
Shielding box for weak-voltage detector Download PDFInfo
- Publication number
- CN201654083U CN201654083U CN2010201809650U CN201020180965U CN201654083U CN 201654083 U CN201654083 U CN 201654083U CN 2010201809650 U CN2010201809650 U CN 2010201809650U CN 201020180965 U CN201020180965 U CN 201020180965U CN 201654083 U CN201654083 U CN 201654083U
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- weak voltage
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Abstract
The utility model relates to a shielding box for a weak-voltage detector. Various components forming the weak-voltage detector are accommodated in the shielding box, and the shielding box comprises a front panel, a back panel and a box body region, wherein the box body region is positioned between the front panel region and the back panel region, the box body region comprises a main function region and a power supply region, the main function region is in adjacent connection to the front panel, the power supply region is in adjacent connection to the back panel, and the main function region is mutually isolated from other parts of the shielding box through an electromagnetic shielding plate. Because the utility model adopts the design scheme that the power supplies are in grouped design and layout, simulation circuits and digital circuits are shielded in groups, each function module is shielded and isolated, data transmission wires and control signal wires are connected in groups, signal current returns a driving source thereof after passing through a low-resistance path and the like, the electromagnetic compatibility problem is solved, the work environment of the weak-voltage detector is improved, the anti-jamming capability of the weak-voltage detector is improved, and good work environment is provided for improving the sensitivity of the weak-voltage detector.
Description
Technical field
The utility model relates to a kind of design of instrument space layout and electromagnetic signal interference inhibition field related when developing weak voltage and detecting with calibrating installation, particularly relevant for a kind of shielded box that is used for the weak voltage pick-up unit, with rationally distributed, stable performance and the high-precision test index that realizes the feeble signal instrument and equipment.
Background technology
In the feeble signal measuring process, no matter be the variation of measuring Weak Physical Quantity, still receive faint echoed signal, general all is to adopt highly sensitive sensor or receiver that the variation of faint physical quantity is converted to faint voltage signal or directly receives faint voltage signal, adopts micro-measuring technique that weak voltage is measured again.
To the device that weak voltage detects, for example receive and lie prostrate voltage standard device etc., to form by various electronic devices and components, direct supply, data acquisition and control circuit and software systems usually, these components and parts need be installed in the cabinet usually.Concerning feeble signal is measured, in same cabinet, between metering circuit and the computer control circuit, between each parts, the electromagnetic interference (EMI) between the components and parts is very big, test performance to instrument and equipment makes a big impact, therefore, need a kind of shielded box that possesses the special use of the various interference of shielding of design, with the rational deployment of realization instrument and good test index.
The utility model content
The technical problems to be solved in the utility model provides a kind of shielded box that is used for the weak voltage pick-up unit, to reduce or to avoid problem noted earlier.
For solving the problems of the technologies described above, the utility model proposes a kind of shielded box that is used for the weak voltage pick-up unit, accommodate the various parts that constitute described weak voltage pick-up unit in this shielded box, wherein, described shielded box comprises a front panel, rear panel and the casing district between described front panel and described rear panel, described casing district comprises that the other parts of described function of tonic chord district and described shielded box are isolated mutually by electromagnetic shielding plate in abutting connection with the power supply area of the function of tonic chord district of described front panel and the described rear panel of adjacency.
Preferably, described function of tonic chord district comprises measurement calibration areas and the control and treatment district that is arranged side by side, and isolates mutually by electromagnetic shielding plate between described measurement calibration areas and the described control and treatment district; Thereby the measurement and the computer control of feeble signal are isolated mutually, and the size shape in function of tonic chord district has taken into full account the installation requirements of each circuit board requisite space and other components and parts of instrument such as attenuator.
Preferably, described measurement calibration areas comprises a plurality of circuit boards, be respectively preamplification board, program control amplification filtering plate, reference signal plate and signal measurement plate, the closed shield aluminium box that described a plurality of circuit board is respectively separate is formed, and can dismantle separately each other, separate, and helps the maintenance of instrument.
Preferably, described function of tonic chord district comprises four subregions, is respectively control and treatment district, calibrating signal plate district, reference signal plate and signal measurement plate district, preamplification board and program control amplification filtering plate district; Described four subregions are that four separate closed shield aluminium boxes are formed, and can dismantle separately each other, separate.
Preferably, be provided with a switch contacts shadow zone between described measurement calibration areas and the front panel, described switch contacts shadow zone isolates mutually by electromagnetic shielding plate and described measurement calibration areas and described front panel, reduces the interference of circuit board to the input feeble signal.
Preferably, connection between each circuit board in the described measurement calibration areas, and being connected of circuit board and described control and treatment district, all be to be embedded on the shielding aluminium sheet wall by the connector that will plug, both sides connect corresponding circuit board with lead respectively, realize the shielding that shielded box is inner with extraneous so to greatest extent.
Preferably, described front panel is provided with input, output, demonstration, operating function interface and button, and described input, output, demonstration, operating function interface and button enter to described switch contacts shadow zone by joint.The display screen that is fixed on front panel is behind with the shielding of aluminum shielding box, and the circuit board radiation signal is to the influence of apparatus measures behind the reduction display screen
Preferably, be respectively arranged with in the described power supply area ± 15V, ± 12V, ± the 5V D.C. regulated power supply; All concentrate the rear side that is placed on shielding case,, reduce and disturb to optimize the power supply cabling.
The characteristics and the advantage of shielded box of the present utility model are:
Owing to adopted design proposals such as the power supply packet design is connected with the control signal wire grouping with digital circuit branch set of shield, each functional module shielding isolation, data line with layout, mimic channel, marking current returns its drive source through a low-impedance path to solve electromagnetic compatibility problem, improved the working environment of weak voltage pick-up unit, improved the antijamming capability of weak voltage pick-up unit, for the sensitivity that improves the weak voltage pick-up unit provides good working environment.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein,
What Fig. 1 showed is a kind of schematic perspective view that is used for the shielding case of weak voltage pick-up unit of specifically executing example according to one of the present utility model.
What Fig. 2 showed is a kind of each functional module shielded box of primary function area according to the design of correlation detection technology needs of specifically executing example according to one of the present utility model.
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast description of drawings embodiment of the present utility model.Wherein, identical parts adopt identical label.
Embodiment 1
Fig. 1 shows is a kind of shielded box 1 that is used for the weak voltage pick-up unit according to a specific embodiment of the present utility model, accommodate the various parts that constitute described weak voltage pick-up unit in this shielded box 1, for example, power supply, preamplification board, program control amplification plate, filter band, relevant treatment plate, attenuating plate, calibration signal source, CPU, data acquisition and control circuit or the like (not shown).These parts that constitute above-mentioned weak voltage pick-up unit can produce great electromagnetic interference (EMI), so adopt the power supply packet design to solve electromagnetic compatibility problem with digital circuit branch set of shield, each functional module shielding isolation, data line with the design proposal that the control signal wire grouping is connected, marking current returns its drive source through a low-impedance path with layout, mimic channel in the utility model.
Specifically, referring to Fig. 1, shielded box 1 comprises a front panel 2, a rear panel 3 and the casing district 4 between front panel 2 and rear panel 3, casing district 4 comprises that in abutting connection with the function of tonic chord district 5 of front panel 2 with in abutting connection with the power supply area 6 of rear panel 3 function of tonic chord district 5 isolates by electromagnetic shielding plate 10 mutually with the other parts of shielded box 1.
Function of tonic chord district 5 comprises the measurement calibration areas 51 and control and treatment district 52 that is arranged side by side, and measures between calibration areas 51 and the control and treatment district 52 and isolates mutually by electromagnetic shielding plate 10.
Measure between calibration areas 51 and the front panel 2 and be provided with a switch contacts shadow zone 53, switch contacts shadow zone 53 isolates mutually by electromagnetic shielding plate 10 and measurement calibration areas 51 and front panel 2.
Measure between calibration areas 51 and the power supply area 6 and be provided with a control line, signal wire shadow zone 7, control line, signal wire shadow zone 7 isolate mutually by electromagnetic shielding plate 10 and measurement calibration areas 51 and power supply area 6.
Be respectively arranged with in the power supply area 6 ± 15V, ± 12V, ± the 5V D.C. regulated power supply.Rear panel 3 is provided with power supply interface, switch and reset key (not shown), and power supply interface, switch and reset key are connected to power supply area 6 by the cable (not shown).
Shielded box of the present utility model is owing to adopted design proposals such as the power supply packet design is connected with the control signal wire grouping with digital circuit branch set of shield, each functional module shielding isolation, data line with layout, mimic channel, marking current returns its drive source through a low-impedance path to solve electromagnetic compatibility problem, improved the working environment of weak voltage pick-up unit, improved the antijamming capability of weak voltage pick-up unit, for the sensitivity that improves the weak voltage pick-up unit provides good working environment.
As shown in Figure 2, described measurement calibration areas 51 comprises a plurality of circuit boards, for example be respectively preamplification board 51a, program control amplification filtering plate 51b, reference signal plate 51c and signal measurement plate 51d, the closed shield aluminium box that described a plurality of circuit board is respectively separate is formed, and can dismantle separately each other, separate.
That is to say that if function of tonic chord district 5 is further divided, function of tonic chord district 5 comprises four subregions so, be respectively control and treatment district 52, calibrating signal plate district, reference signal plate and signal measurement plate district, preamplification board and program control amplification filtering plate district; Described four subregions are that four separate closed shield aluminium boxes are formed, and can dismantle separately each other, separate.
The above only is the schematic embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations, the modification of being done under the prerequisite that does not break away from design of the present utility model and principle and combining all should belong to the scope of the utility model protection.
Claims (8)
1. shielded box that is used for the weak voltage pick-up unit, accommodate the various parts that constitute described weak voltage pick-up unit in this shielded box, it is characterized in that, described shielded box comprises a front panel, rear panel and the casing district between described front panel and described rear panel, described casing district comprises that the other parts of described function of tonic chord district and described shielded box are isolated mutually by electromagnetic shielding plate in abutting connection with the power supply area of the function of tonic chord district of described front panel and the described rear panel of adjacency.
2. the shielded box that is used for the weak voltage pick-up unit according to claim 1, it is characterized in that, described function of tonic chord district comprises measurement calibration areas and the control and treatment district that is arranged side by side, and isolates mutually by electromagnetic shielding plate between described measurement calibration areas and the described control and treatment district.
3. the shielded box that is used for the weak voltage pick-up unit according to claim 2, it is characterized in that, described measurement calibration areas comprises a plurality of circuit boards, be respectively preamplification board, program control amplification filtering plate, the closed shield aluminium box that reference signal plate and signal measurement plate, described a plurality of circuit boards are respectively separate is formed, and can dismantle separately each other, separate.
4. the shielded box that is used for the weak voltage pick-up unit according to claim 1, it is characterized in that, described function of tonic chord district comprises four subregions, is respectively control and treatment district, calibrating signal plate district, reference signal plate and signal measurement plate district, preamplification board and program control amplification filtering plate district; Described four subregions are that four separate closed shield aluminium boxes are formed, and can dismantle separately each other, separate.
5. the shielded box that is used for the weak voltage pick-up unit according to claim 2, it is characterized in that, be provided with a switch contacts shadow zone between described measurement calibration areas and the front panel, described switch contacts shadow zone isolates mutually by electromagnetic shielding plate and described measurement calibration areas and described front panel.
6. the shielded box that is used for the weak voltage pick-up unit according to claim 3, it is characterized in that, connection between each circuit board in the described measurement calibration areas, and being connected of circuit board and described control and treatment district, all be to be embedded on the shielding aluminium sheet wall by the connector that will plug, both sides connect corresponding described circuit board with lead respectively.
7. the shielded box that is used for the weak voltage pick-up unit according to claim 5, it is characterized in that, described front panel is provided with input, output, demonstration, operating function interface and button, described input, output, demonstration, operating function interface and button enter to described switch contacts shadow zone by joint, and the display screen that is fixed on front panel is behind with the shielding of aluminum shielding box.
8. the shielded box that is used for the weak voltage pick-up unit according to claim 6 is characterized in that, be respectively arranged with in the described power supply area ± 15V, ± 12V, ± the 5V D.C. regulated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201809650U CN201654083U (en) | 2010-05-06 | 2010-05-06 | Shielding box for weak-voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201809650U CN201654083U (en) | 2010-05-06 | 2010-05-06 | Shielding box for weak-voltage detector |
Publications (1)
| Publication Number | Publication Date |
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| CN201654083U true CN201654083U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201809650U Expired - Fee Related CN201654083U (en) | 2010-05-06 | 2010-05-06 | Shielding box for weak-voltage detector |
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| CN (1) | CN201654083U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853911A (en) * | 2012-08-29 | 2013-01-02 | 昆山书豪仪器科技有限公司 | Electromagnetic compatibility device for spark light source of photoelectric direct-reading spectrometer |
| CN102944755A (en) * | 2012-11-06 | 2013-02-27 | 西安开容电子技术有限责任公司 | Rechargeable and portable signal amplifier |
| CN103487643A (en) * | 2013-10-08 | 2014-01-01 | 王岩 | Intelligent non-contact voltage sensor and calibrating method thereof |
| CN104105388A (en) * | 2014-05-29 | 2014-10-15 | 北京宇航系统工程研究所 | Electromagnetic shielding system of measuring integration controller |
| CN104101746A (en) * | 2014-07-23 | 2014-10-15 | 宁波南车时代传感技术有限公司 | Magnetic shielding structural part of magnetic modulation voltage transducer |
| CN106770490A (en) * | 2017-01-06 | 2017-05-31 | 南京华天科技发展股份有限公司 | A kind of multichannel conductivity measuring apparatus |
| CN107179451A (en) * | 2017-05-15 | 2017-09-19 | 深圳市量为科技有限公司 | Integrated low frequency noise measurement device |
| CN108323076A (en) * | 2018-02-13 | 2018-07-24 | 江苏和亿智能科技有限公司 | A kind of strong and weak electrically separated layout circuit of safety check instrument |
| CN109612565A (en) * | 2018-12-29 | 2019-04-12 | 国网上海市电力公司 | A kind of outdoor installs case cabinet of transformer winding state vibration monitoring |
| CN111579838A (en) * | 2020-05-28 | 2020-08-25 | 海南驿电通科技有限公司 | Shielding device of cable oscillatory wave partial discharge detection system |
| CN113498283A (en) * | 2020-04-07 | 2021-10-12 | 南京南瑞继保电气有限公司 | Signal acquisition box for series compensation device |
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2010
- 2010-05-06 CN CN2010201809650U patent/CN201654083U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853911B (en) * | 2012-08-29 | 2014-06-11 | 昆山书豪仪器科技有限公司 | Electromagnetic compatibility device for spark light source of photoelectric direct-reading spectrometer |
| CN102853911A (en) * | 2012-08-29 | 2013-01-02 | 昆山书豪仪器科技有限公司 | Electromagnetic compatibility device for spark light source of photoelectric direct-reading spectrometer |
| CN102944755B (en) * | 2012-11-06 | 2018-08-17 | 西安开容电子技术有限责任公司 | A kind of chargeable portable signal amplifier used |
| CN102944755A (en) * | 2012-11-06 | 2013-02-27 | 西安开容电子技术有限责任公司 | Rechargeable and portable signal amplifier |
| CN103487643A (en) * | 2013-10-08 | 2014-01-01 | 王岩 | Intelligent non-contact voltage sensor and calibrating method thereof |
| CN104105388A (en) * | 2014-05-29 | 2014-10-15 | 北京宇航系统工程研究所 | Electromagnetic shielding system of measuring integration controller |
| CN104105388B (en) * | 2014-05-29 | 2017-03-15 | 北京宇航系统工程研究所 | A kind of electromagnetic shielding system of measurement ICU |
| CN104101746A (en) * | 2014-07-23 | 2014-10-15 | 宁波南车时代传感技术有限公司 | Magnetic shielding structural part of magnetic modulation voltage transducer |
| CN104101746B (en) * | 2014-07-23 | 2016-09-14 | 宁波中车时代传感技术有限公司 | The magnet shielding structure part of magnetic modulation voltage sensor |
| CN106770490A (en) * | 2017-01-06 | 2017-05-31 | 南京华天科技发展股份有限公司 | A kind of multichannel conductivity measuring apparatus |
| CN107179451A (en) * | 2017-05-15 | 2017-09-19 | 深圳市量为科技有限公司 | Integrated low frequency noise measurement device |
| CN108323076A (en) * | 2018-02-13 | 2018-07-24 | 江苏和亿智能科技有限公司 | A kind of strong and weak electrically separated layout circuit of safety check instrument |
| CN108323076B (en) * | 2018-02-13 | 2024-01-26 | 江苏和亿智能科技有限公司 | Strong and weak electricity separation layout circuit of security inspection instrument |
| CN109612565A (en) * | 2018-12-29 | 2019-04-12 | 国网上海市电力公司 | A kind of outdoor installs case cabinet of transformer winding state vibration monitoring |
| CN113498283A (en) * | 2020-04-07 | 2021-10-12 | 南京南瑞继保电气有限公司 | Signal acquisition box for series compensation device |
| CN111579838A (en) * | 2020-05-28 | 2020-08-25 | 海南驿电通科技有限公司 | Shielding device of cable oscillatory wave partial discharge detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20110506 |