CN205581288U - High accuracy direct current electric energy meter - Google Patents
High accuracy direct current electric energy meter Download PDFInfo
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- CN205581288U CN205581288U CN201620398245.9U CN201620398245U CN205581288U CN 205581288 U CN205581288 U CN 205581288U CN 201620398245 U CN201620398245 U CN 201620398245U CN 205581288 U CN205581288 U CN 205581288U
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- electric energy
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Abstract
The utility model relates to a high accuracy direct current electric energy meter, including arrival current end, shunt, input voltage end, divider, current comparator, voltage comparater, measurement chip, display module, switch and direct current standard source, the shunt of establishing ties between arrival current end and the measurement chip, arrival current is connected to the measurement chip after the shunt, be connected with a current comparator between measurement chip and shunt, and this current comparator connects the current input interface that awaits measuring through the wire, it has a divider to establish ties between input voltage end and the measurement chip, and it has a voltage comparater still to establish ties between this divider and the measurement chip, and this voltage comparater connects the voltage input interface that awaits measuring through the wire. The utility model relates to a circuit structure, simple structure, small in size improves and detects data reliability, improves detection efficiency for detecting the high accuracy direct current electric energy meter of ordinary electric energy meter.
Description
Technical field
This utility model belongs to gauge check field, especially a kind of High-accuracy direct current electric energy meter.
Background technology
At present, all lives of people, work, activity nearly all have close relationship with electric energy, and it is raw that electric energy meter also becomes society
Device relationships necessary in work huge numbers of families, and the accuracy of electric energy meter is related to huge numbers of families.Specify electricity according to relevant code
Can table periodically examine and determine, calibrate be to maintain electric power meter, test equipment reliability, electric energy value traceability and
One of transitivity the most important effect approach.The verifying work improving electric energy meter accurately and efficiently is gauge check department
Important topic.
At present, the detection method of electric energy meter is to use detection of being reached the standard grade by electric energy meter to be measured, detection line is provided with tens of to hundreds of
Platform detection equipment is to meet whole detection demands of reaching the standard grade of a large amount of electric energy meter, in practice of construction, due to operational approach, environment bar
Part, use the performance of the equipment that affect of the many factors such as frequency, vibration, need to be repeated a number of times calibration judgement, the most each
The calibration cycle time is long, and labor workload is big, inefficiency.
Utility model content
In place of the purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of design science, convenient to operate, accurate
High-accuracy direct current electric energy meter reliably.
This utility model solves it and technical problem is that and take techniques below scheme to realize:
A kind of High-accuracy direct current electric energy meter, including input current end, diverter, Input voltage terminal, potentiometer, current comparator,
Voltage comparator, computation chip, display module and switch, be in series with a stepping controlled between input current end and computation chip
Diverter, diverter is divided into 10 milliohms and 1 milliohm two grades；Input current is connected to computation chip after diverter, should
Current comparator connects electric current input interface to be measured by wire；A potentiometer it is in series with between Input voltage terminal and computation chip；
Computation chip has been also respectively connected with a display module and a switch.
And, the main body cover top of described electric energy meter is provided with display screen, and this display screen correspondence display module is used for showing metering
The result of calculation of chip, is separately installed with switch, diverter gear knob and potentiometer gear knob in main body cover bottom,
Diverter knob is divided into 10 milliohms and 1 milliohm two grades；Draw many binding posts in the lower end of main body cover, be used for connecting to be measured
DC circuit；There are diverter, potentiometer, computation chip and line circuit main body cover is internally installed.
And, described potentiometer is divided into 10 milliohms and 1 milliohm two grades.
Advantage of the present utility model and good effect be:
This utility model is the circuit structure of a kind of High-accuracy direct current electric energy meter for detecting common electric energy meter, simple in construction, body
Long-pending small and exquisite, improve detection data reliability, improve detection efficiency.
Accompanying drawing explanation
Fig. 1 is this utility model schematic appearance；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is the circuit diagram of computation chip.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings and by specific embodiment, and following example are illustrative,
It not determinate, it is impossible to limit protection domain of the present utility model with this.
A kind of High-accuracy direct current electric energy meter, including input current end I, diverter, Input voltage terminal U, potentiometer, computation chip,
Display module and switch, be in series with, between input current end I and computation chip, the diverter that a stepping is controlled, and this diverter divides
Being 10 milliohms and 1 milliohm two grades, according to measuring the gear needing to select correspondence, the certainty of measurement of this electric energy meter can reach
0.01 grade, input current is connected to computation chip after diverter；It is in series with one between Input voltage terminal U and computation chip
Individual potentiometer, this potentiometer uses trimmable resistance, needs to regulate potentiometer gear according to measurement.
Computation chip comprises impulse scaler and DSP computing chip, calculates actual power P；Computation chip is also associated with one
Display module, the result of calculation of this display module display computation chip；Computation chip connects a standard dc source, the present embodiment
Standard dc source use GF6019 direct current calibration power source, standard dc source connect have whether an on-off control works, this direct current
The outfan of standard source connects input current end I and Input voltage terminal U respectively.
Main body cover 1 top of electric energy meter is provided with display screen 2, and this display screen correspondence display module is for showing computation chip
Result of calculation, is separately installed with switch 3, diverter gear knob 6 and potentiometer gear knob 5 in main body cover bottom, point
Stream device knob and dividing potential drop knob are all divided into 10 milliohms and 1 milliohm two grades；Many binding posts 4 are drawn in the lower end of main body cover,
For connecting DC circuit to be measured；There are diverter, potentiometer, computation chip and line circuit main body cover is internally installed.
Being connected between computation chip with diverter and have a current comparator A1, this current comparator connects electric current to be measured by wire
Input interface, may be used for connection detection circuit or ammeter to be measured；A voltage ratio also it is in series with between this potentiometer and computation chip
Relatively device A2, this voltage comparator connects voltage input interface to be measured by wire, may be used for connection detection circuit or ammeter to be measured,
It it is all DC circuit to be measured；
When being directly connected to ammeter to be measured, open standard dc source, straight by high stability of input current end I and Input voltage terminal U
Flow standard source provides electric current and voltage, and ammeter the most to be measured connects dividing potential drop comparator and shunting comparator；It is directly connected to testing circuit
Time, input current end I and Input voltage terminal U can be directly connected to testing circuit and be provided input current I and input by testing circuit
Voltage U, now shunting comparator and dividing potential drop comparator not communication with detection circuit.
Although disclosing embodiment of the present utility model and accompanying drawing for the purpose of illustration, but it will be appreciated by those skilled in the art that:
Without departing from this utility model and spirit and scope of the appended claims, various replacements, to change and modifications be all possible,
Therefore, scope of the present utility model is not limited to embodiment and accompanying drawing disclosure of that.
Claims (3)
1. a High-accuracy direct current electric energy meter, including input current end, diverter, Input voltage terminal, potentiometer, current ratio relatively
Device, voltage comparator, computation chip, display module and switch, be in series with a stepping between input current end and computation chip
Controlled diverter, diverter is divided into 10 milliohms and 1 milliohm two grades；Input current is connected to computation chip after diverter,
This current comparator connects electric current input interface to be measured by wire；A potentiometer it is in series with between Input voltage terminal and computation chip；
Computation chip has been also respectively connected with a display module and a switch.
High-accuracy direct current electric energy meter the most according to claim 1, it is characterised in that: the main body cover top of described electric energy meter
Being provided with display screen, this display screen correspondence display module is for showing the result of calculation of computation chip, in main body cover bottom respectively
Being provided with switch, diverter gear knob and potentiometer gear knob, diverter knob is divided into 10 milliohms and 1 milliohm two grades；
Draw many binding posts in the lower end of main body cover, be used for connecting DC circuit to be measured；There is shunting main body cover is internally installed
Device, potentiometer, computation chip and line circuit.
High-accuracy direct current electric energy meter the most according to claim 1, it is characterised in that: described potentiometer be divided into 10 milliohms and
1 milliohm two grades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620398245.9U CN205581288U (en) | 2016-05-05 | 2016-05-05 | High accuracy direct current electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620398245.9U CN205581288U (en) | 2016-05-05 | 2016-05-05 | High accuracy direct current electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205581288U true CN205581288U (en) | 2016-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620398245.9U Active CN205581288U (en) | 2016-05-05 | 2016-05-05 | High accuracy direct current electric energy meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN205581288U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315156A (en) * | 2017-08-09 | 2017-11-03 | 浙江涵普电力科技有限公司 | High-accuracy direct current standard electric energy meter |
| CN109490817A (en) * | 2018-11-05 | 2019-03-19 | 河南朗博校准检测有限公司 | One kind being applicable in a variety of ammeter detection devices |
| CN109870649A (en) * | 2019-04-03 | 2019-06-11 | 广东省计量科学研究院（华南国家计量测试中心） | A kind of calibration system and method for alternating-current charging pile calibrating installation |
-
2016
- 2016-05-05 CN CN201620398245.9U patent/CN205581288U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315156A (en) * | 2017-08-09 | 2017-11-03 | 浙江涵普电力科技有限公司 | High-accuracy direct current standard electric energy meter |
| CN107315156B (en) * | 2017-08-09 | 2024-04-16 | 浙江涵普电力科技有限公司 | High-precision direct-current standard electric energy meter |
| CN109490817A (en) * | 2018-11-05 | 2019-03-19 | 河南朗博校准检测有限公司 | One kind being applicable in a variety of ammeter detection devices |
| CN109870649A (en) * | 2019-04-03 | 2019-06-11 | 广东省计量科学研究院（华南国家计量测试中心） | A kind of calibration system and method for alternating-current charging pile calibrating installation |
| CN109870649B (en) * | 2019-04-03 | 2021-07-30 | 广东省计量科学研究院（华南国家计量测试中心） | Calibration system and method for alternating current charging pile calibration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Jingtao Inventor after: Zhou Hailiang Inventor after: Wang Qiang Inventor after: Zhao Xinming Inventor before: Guo Jingtao Inventor before: Zhou Hailiang Inventor before: Wang Qiang |