CN203870162U - Mini three-phase AC ampere meter - Google Patents
Mini three-phase AC ampere meter Download PDFInfo
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- CN203870162U CN203870162U CN201420292129.XU CN201420292129U CN203870162U CN 203870162 U CN203870162 U CN 203870162U CN 201420292129 U CN201420292129 U CN 201420292129U CN 203870162 U CN203870162 U CN 203870162U
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- 230000006854 communication Effects 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 24
- 210000002500 microbody Anatomy 0.000 claims description 15
- 238000009434 installation Methods 0.000 abstract description 5
- 230000007175 bidirectional communication Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a mini three-phase AC ampere meter which comprises a single-chip microcomputer, an RS485 communication module, a nixie tube display module, a power supply module and a current parameter acquisition module, wherein the RS485 communication module and the single-chip microcomputer are connected in bidirectional communication means, the output terminal of the current parameter acquisition module is connected with the input terminal of the single-chip microcomputer, the input terminal of the nixie tube display module is connected with the output terminal of the single-chip microcomputer, and the output terminal of the power supply module is connected with the input terminal of the single-chip microcomputer. A built-in power supply module is employed, and an electronic circuit portion which converts commercial power into DC power is not required. The RS485 communication interface facilitates connection with external interfaces. The built-in power supply module eliminates limitation of installation conditions, thereby minimizing size and facilitating installation.
Description
Technical field
The utility model relates to power measurement field, particularly, relates to the long-pending three-phase alternating current flow instrument of a kind of microbody.
Background technology
Three-phase alternating current flow instrument is programmable, intelligent instrument of new generation, for three-phase A, the B of electric line, high precision, the intelligent power distribution monitoring device of C three-phase current design in the application scenarios such as the power monitorings such as electric system, industrial and mining enterprises, metering examination.Three-phase alternating current flow instrument is high precision, the intelligent power distribution monitoring device for the application scenario design of the power monitorings such as electric system, industrial and mining enterprises, metering examination.Existing current instrument model is various, and great majority can only monitor single-phase current, and needs outside that power supply is provided.Existing three-phase current instrument is also very many, and most power supply is also all 220V alternating current, but all volume ratio is larger.
Utility model content
The purpose of this utility model is, for the problems referred to above, proposes the long-pending three-phase alternating current flow instrument of a kind of microbody, little to realize volume, easy for installation advantage.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of microbody amasss three-phase alternating current flow instrument, comprise single-chip microcomputer, RS485 communication module, charactron display module, power module and current parameters acquisition module, described RS485 communication module is connected with single-chip microcomputer two-way communication, the output terminal of described current parameters acquisition module is connected with the input end of single-chip microcomputer, the input end of described charactron display module is connected with the output terminal of single-chip microcomputer, and the output terminal of described power module is connected with the input end of single-chip microcomputer.
Further, on described single-chip microcomputer, button is set.
Further, described current parameters acquisition module comprises current collection circuit and computation chip, described current collection circuit comprises mutual inductor CT1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 3, capacitor C 4, capacitor C 8 and capacitor C 9, resistance in series R3 between two output terminals of described mutual inductor CT1, resistance in series R2 between output terminal of mutual inductor CT1 and the input end of computation chip, resistance in series R5 between another output terminal of mutual inductor CT1 and the input end of computation chip, described resistance R 1 is connected with resistance R 2, series capacitance C3 between the node of 2 of resistance R 1 and resistance R and ground, described capacitor C 4 is in parallel with capacitor C 3, resistance R 4 and resistance R 5 series connection, series capacitance C8 between the node of 5 of resistance R 4 and resistance R and ground, described capacitor C 9 is in parallel with capacitor C 8.
Further, described computation chip adopts ATT7026A chip.
Further, described single-chip microcomputer adopts STM8S208-64 chip.
Further, on described STM8S208-64 chip, 74HC245 chip is set.
The technical solution of the utility model has following beneficial effect:
The technical solution of the utility model, built-in power module, thereby without the electronic circuit part that civil power is converted to direct supply, and RS485 communication interface is set, be convenient to be connected with external interface, Yin Nei establishes power module, has broken away from the restriction of mounting condition, thereby it is little to have reached volume, object easy for installation.
And further improvement to current parameters acquisition module has improved the measuring accuracy of instrument.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the long-pending three-phase alternating current flow instrument of microbody described in the utility model embodiment;
Fig. 2 to Figure 10 is the electronic circuitry of the long-pending three-phase alternating current flow instrument of microbody described in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of microbody amasss three-phase alternating current flow instrument, comprise single-chip microcomputer, RS485 communication module, charactron display module, power module and current parameters acquisition module, RS485 communication module is connected with single-chip microcomputer two-way communication, the output terminal of current parameters acquisition module is connected with the input end of single-chip microcomputer, the input end of charactron display module is connected with the output terminal of single-chip microcomputer, and the output terminal of power module is connected with the input end of single-chip microcomputer.
Wherein, on single-chip microcomputer, button is set.
As shown in Figure 7, current parameters acquisition module comprises current collection circuit and computation chip, described current collection circuit comprises mutual inductor CT1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 3, capacitor C 4, capacitor C 8 and capacitor C 9, resistance in series R3 between two output terminals of described mutual inductor CT1, resistance in series R2 between output terminal of mutual inductor CT1 and the input end of computation chip, resistance in series R5 between another output terminal of mutual inductor CT1 and the input end of computation chip, described resistance R 1 is connected with resistance R 2, series capacitance C3 between the node of 2 of resistance R 1 and resistance R and ground, described capacitor C 4 is in parallel with capacitor C 3, resistance R 4 and resistance R 5 series connection, series capacitance C8 between the node of 5 of resistance R 4 and resistance R and ground, described capacitor C 9 is in parallel with capacitor C 8.The long-pending three-phase alternating current flow instrument of this microbody is provided with three road current collection circuits to realize the collection to three-phase alternating current.
The long-pending three-phase alternating current meter electronics circuit diagram of microbody is as shown in Fig. 2 to Figure 10, and single-chip microcomputer adopts STM8S208-64 chip.74HC245 chip is set on STM8S208-64 chip.74HC245 chip is for driving chip.As shown in Figure 8, computation chip adopts ATT7026A chip.
Three-phase current instrument of the present utility model adopts highly reliable MCU design, and adopts high precision electric current transducer.Can measure three-phase current in three phase network.There is mutual inductor ratio function is set, can increase current monitoring scope.There is RS485 communication interface.Volume is little, and easy for installation, dependable performance, measurement and metrology precision are high.
This instrument all adopts dedicated three-phase electrical parameter metering chip (ATT) and the high-performance chip microprocessor with true rms measurement characteristic, Applied Digital signal processing technology and SMT technique manufacture and design with modular mode, can measure exactly superposition in various different frequencies or circuit has the power network current actual value in harmonic component situation, by the keyboard of instrument, can realize easily the setting to the mutual inductor multiplying power of instrument.Gauge internal has all been cancelled adjustment potentiometer, and modularization and unitized design have significantly reduced the production cost of instrument, makes this instrument have high cost performance.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a microbody amasss three-phase alternating current flow instrument, it is characterized in that, comprise single-chip microcomputer, RS485 communication module, charactron display module, power module and current parameters acquisition module, described RS485 communication module is connected with single-chip microcomputer two-way communication, the output terminal of described current parameters acquisition module is connected with the input end of single-chip microcomputer, the input end of described charactron display module is connected with the output terminal of single-chip microcomputer, and the output terminal of described power module is connected with the input end of single-chip microcomputer.
2. the long-pending three-phase alternating current flow instrument of microbody according to claim 1, is characterized in that, on described single-chip microcomputer, button is set.
3. microbody according to claim 1 and 2 amasss three-phase alternating current flow instrument, it is characterized in that, described current parameters acquisition module comprises current collection circuit and computation chip, described current collection circuit comprises mutual inductor CT1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, capacitor C 3, capacitor C 4, capacitor C 8 and capacitor C 9, resistance in series R3 between two output terminals of described mutual inductor CT1, resistance in series R2 between output terminal of mutual inductor CT1 and the input end of computation chip, resistance in series R5 between another output terminal of mutual inductor CT1 and the input end of computation chip, described resistance R 1 is connected with resistance R 2, series capacitance C3 between the node of 2 of resistance R 1 and resistance R and ground, described capacitor C 4 is in parallel with capacitor C 3, resistance R 4 and resistance R 5 series connection, series capacitance C8 between the node of 5 of resistance R 4 and resistance R and ground, described capacitor C 9 is in parallel with capacitor C 8.
4. the long-pending three-phase alternating current flow instrument of microbody according to claim 3, is characterized in that, described computation chip adopts ATT7026A chip.
5. the long-pending three-phase alternating current flow instrument of microbody according to claim 4, is characterized in that, described single-chip microcomputer adopts STM8S208-64 chip.
6. the long-pending three-phase alternating current flow instrument of microbody according to claim 4, is characterized in that, on described STM8S208-64 chip, 74HC245 chip is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420292129.XU CN203870162U (en) | 2014-06-04 | 2014-06-04 | Mini three-phase AC ampere meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420292129.XU CN203870162U (en) | 2014-06-04 | 2014-06-04 | Mini three-phase AC ampere meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203870162U true CN203870162U (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420292129.XU Expired - Fee Related CN203870162U (en) | 2014-06-04 | 2014-06-04 | Mini three-phase AC ampere meter |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652077A (en) * | 2015-12-30 | 2016-06-08 | 天津诚电科技有限公司 | Current testing instrument |
-
2014
- 2014-06-04 CN CN201420292129.XU patent/CN203870162U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652077A (en) * | 2015-12-30 | 2016-06-08 | 天津诚电科技有限公司 | Current testing instrument |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 |