CN205450108U - Electric energy meter based on hall sensor - Google Patents
Electric energy meter based on hall sensor Download PDFInfo
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- CN205450108U CN205450108U CN201620212025.2U CN201620212025U CN205450108U CN 205450108 U CN205450108 U CN 205450108U CN 201620212025 U CN201620212025 U CN 201620212025U CN 205450108 U CN205450108 U CN 205450108U
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Abstract
The utility model discloses an electric energy meter based on hall sensor, including hall current detection module, metering modules and control module, hall current detection module comprises hall sensor and output signal modulate circuit, hall sensor includes magnetic ring, hall chip and the compensating coil who has the breach, and the magnetic ring overlaps on the circuit -under -test, and the hall chip sets up in magnetic ring breach department, imports the current signal that detects into the output signal modulate circuit, and compensating coil winds on the magnetic ring and connects the output signal modulate circuit, the output signal modulate circuit comprises hall sensor signal processing chip for receive the voltage signal of hall chip, spread into metering modules into after handling, also according to size output offset current to the compensating coil who is surveyed the current signal, realize the measurement to being surveyed the electric current. The utility model discloses a form of closed loop hall current sensor, measuring range that can dynamic adjustment hall sensor has greatly improved the precision of hall current sampling.
Description
Technical field
This utility model is specifically related to a kind of electric energy meter based on Hall element.
Background technology
Along with development and the raising of people's living standard of national economy technology, electric energy has become as one of most important energy in the daily production of people and life.Electric energy meter is as the measuring instrument of metering electric energy usage amount, and its importance, accuracy and reliability are for power system and user, most important.
Hall element is a kind of broadband current sensor, can be used for the detection in various alternating current-direct current magnetic field.But the offset voltage intrinsic due to Hall element and temperature drift characteristic, make the accuracy of detection of electric current is restricted, it is typically only used for the occasion less demanding to accuracy of detection such as power supply, proximity switch, and the current detecting unit of electric energy meter requires accuracy of detection height, good stability, for current specification with one piece of common 1 grade of electric energy meter, its current detection accuracy requires up to 0.3%, and the detectable precision of general Hall element only has 1%, it is impossible to meet electric energy meter measuring requirement.
Utility model content
The purpose of this utility model is the electric energy meter based on Hall element providing a kind of measuring accuracy to meet Standard.
This based on Hall element the electric energy meter that this utility model provides, including power module, Hall current detection module, metering module and control module, Hall current detection module is made up of Hall element and output signal conditioning circuit；Hall element includes carrying magnet ring jaggy, Hall chip and bucking coil, magnet ring is enclosed within circuit-under-test, Hall chip is arranged on the indentation, there of magnet ring, the incoming output signal conditioning circuit of current signal that will detect, bucking coil is wound on magnet ring and is connected with output signal conditioning circuit；Output signal conditioning circuit is made up of Hall element signal processing chip, for receiving the voltage signal of Hall chip, the most incoming metering module, simultaneously the size also according to tested current signal exports and compensates electric current to bucking coil, thus the measurement that realization is to tested electric current.
The model of described Hall element signal processing chip is DRV411.
Described bucking coil is wound on magnet ring the position relative with magnet ring breach.
Described output signal conditioning circuit, 1 foot of DRV411 chip is directly grounded；2 feet and 3 feet are all connected with reference power source by respective current-limiting resistance；4 feet export tested current signal；5 feet are connected to the 3rd foot of the first bi-directional voltage stabilizing pipe；6 feet are connected to the 3rd foot of the second bi-directional voltage stabilizing pipe, are the most also connected with 9 feet；7 feet and 8 feet are all directly grounded；9 feet export compensating current signal to bucking coil by sampling resistor；10 feet are directly connected with bucking coil；11 feet connect power supply signal；12 feet are connected to ground by pull down resistor, are connected with power supply signal by pull-up resistor simultaneously；13 feet use the circuit connecting mode identical with 12 feet；14 feet are connected with power supply signal by light emitting diode and the current-limiting resistance of an Opposite direction connection；15 foot ~ 18 feet are connected with Hall chip；19 feet use the circuit identical with 14 feet to connect；20 feet are directly grounded.
The both sides of described Hall element are disposed with radome, for shielding external electromagnetic interference, thus improve the certainty of measurement of Hall element.
Described control module is single-chip microcomputer, DSP or FPGA.
Described power module includes transformator, switching power source chip and linear voltage regulator.
This based on Hall element the electric energy meter that this utility model provides, uses the form of closed-loop Hall current sensor, it is possible to dynamically adjusts the measurement scope of Hall element, and uses closed loop to drastically increase the precision of Hall current sampling；Use electric energy meter of the present utility model, electric current can measure in the range of 0.05A ~ 100A and can guarantee that the precision of 0.2%, and temperature drift is less than 50ppm/ DEG C under the temperature environment within-40 DEG C ~ 80 DEG C, there is anti-outer magnetic disturbance ability, alternating current-direct current detection and high frequency non-linear harmonic wave component detection function.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present utility model.
Fig. 2 is the schematic diagram of Hall element of the present utility model.
Fig. 3 is the circuit theory diagrams of a kind of embodiment of output signal conditioning circuit of the present utility model.
Detailed description of the invention
It is illustrated in figure 1 functional block diagram of the present utility model: this based on Hall element the electric energy meter that this utility model provides, including power module, Hall current detection module, voltage detection module, metering module, control module, display module, alarm module and communication module, wherein Hall current detection module is made up of Hall element and output signal conditioning circuit；Hall element includes carrying magnet ring jaggy, Hall chip and bucking coil, magnet ring is enclosed within circuit-under-test, Hall chip is arranged on the indentation, there of magnet ring, the incoming output signal conditioning circuit of current signal that will detect, bucking coil is wound on magnet ring and is connected with output signal conditioning circuit；Output signal conditioning circuit is made up of Hall element signal processing chip, for receiving the voltage signal of Hall chip, the most incoming metering module, simultaneously the size also according to current signal exports and compensates electric current to bucking coil, thus the measurement that realization is to tested electric current；Voltage detection module is connected with metering module, for detectable voltage signals incoming metering module；Display module is connected with control module, for showing all kinds of parameters of electric energy meter；Alarm module is connected with control module, for being operated in abnormality alarm at electric energy meter；The model of Hall element is DRV411；Communication module is connected with control module, for electric energy meter and extraneous communication；Communication module includes wire communication module and wireless communication module；Control module can use single-chip microcomputer, DSP or FPGA；Power module can use transformator, switching power source chip and linear voltage regulator.
It is illustrated in figure 2 the schematic diagram of Hall element of the present utility model: Hall element includes carrying magnet ring jaggy, Hall chip and bucking coil, magnet ring is enclosed within circuit-under-test (i.e. testing the wire of electric current through magnet ring), Hall chip is arranged on the indentation, there of magnet ring, the incoming output signal conditioning circuit of current signal that will detect, bucking coil is wound on magnet ring and is connected with output signal conditioning circuit；In this embodiment, bucking coil is wound on magnet ring the position relative with magnet ring breach.
It being illustrated in figure 3 the circuit theory diagrams of a kind of embodiment of output signal conditioning circuit of the present utility model: described output signal conditioning circuit is mainly by indicating * U2 in DRV411(figure) chip forms；1 foot of DRV411 chip is directly grounded；2 feet and 3 feet are all connected with reference power source by respective current-limiting resistance (indicating R5 and R8 in figure)；4 feet export tested current signal (indicating VOUT in figure)；5 feet are connected to the 3rd foot of the first bi-directional voltage stabilizing pipe (indicating D4 in figure)；6 feet are connected to the 3rd foot of the second bi-directional voltage stabilizing pipe (indicating D3 in figure), are the most also connected with 9 feet；7 feet and 8 feet are all directly grounded；9 feet export compensating current signal to bucking coil by sampling resistor (indicating R6 and R7 in figure)；10 feet are directly connected with bucking coil；11 feet connect power supply signal (sign+5V in figure)；12 feet are connected to ground by pull down resistor (indicating R10 in figure), are connected with power supply signal by pull-up resistor (indicating R3 in figure) simultaneously；13 feet use the circuit connecting mode identical with 12 feet；14 feet are connected with power supply signal by light emitting diode (indicating D2 in figure) and the current-limiting resistance (indicating R1 in figure) of an Opposite direction connection；15 foot ~ 18 feet are connected with Hall chip；19 feet use the circuit identical with 14 feet to connect；20 feet are directly grounded.The schematic diagram that the device corresponding to U1 is Hall element indicated in figure: the Hall chip output two paths of signals in Hall element is to DRV411, and is provided power supply signal and ground by DRV411；The bucking coil pin (indicating L1 and L2 in figure) of Hall element is connected with the respective pins of DRV411.
Claims (7)
1. an electric energy meter based on Hall element, including power module, Hall current detection module, metering module and control module, it is characterised in that Hall current detection module is made up of Hall element and output signal conditioning circuit；Hall element includes carrying magnet ring jaggy, Hall chip and bucking coil, magnet ring is enclosed within circuit-under-test, Hall chip is arranged on the indentation, there of magnet ring, the incoming output signal conditioning circuit of current signal that will detect, bucking coil is wound on magnet ring and is connected with output signal conditioning circuit；Output signal conditioning circuit is made up of Hall element signal processing chip, for receiving the voltage signal of Hall chip, the most incoming metering module, simultaneously the size also according to tested current signal exports and compensates electric current to bucking coil, thus the measurement that realization is to tested electric current.
Electric energy meter based on Hall element the most according to claim 1, it is characterised in that the model of described Hall element signal processing chip is DRV411.
Electric energy meter based on Hall element the most according to claim 1, it is characterised in that described bucking coil is wound on magnet ring the position relative with magnet ring breach.
Electric energy meter based on Hall element the most according to claim 1 and 2, it is characterised in that described output signal conditioning circuit, 1 foot of DRV411 chip is directly grounded；2 feet and 3 feet are all connected with reference power source by respective current-limiting resistance；4 feet export tested current signal；5 feet are connected to the 3rd foot of the first bi-directional voltage stabilizing pipe；6 feet are connected to the 3rd foot of the second bi-directional voltage stabilizing pipe, are the most also connected with 9 feet；7 feet and 8 feet are all directly grounded；9 feet export compensating current signal to bucking coil by sampling resistor；10 feet are directly connected with bucking coil；11 feet connect power supply signal；12 feet are connected to ground by pull down resistor, are connected with power supply signal by pull-up resistor simultaneously；13 feet use the circuit connecting mode identical with 12 feet；14 feet are connected with power supply signal by light emitting diode and the current-limiting resistance of an Opposite direction connection；15 foot ~ 18 feet are connected with Hall chip；19 feet use the circuit identical with 14 feet to connect；20 feet are directly grounded.
5., according to the electric energy meter based on Hall element one of claim 1 ~ 3 Suo Shu, it is characterised in that the both sides of described Hall element are disposed with radome, for external electromagnetic interference is shielded, thus improve the certainty of measurement of Hall element.
6. according to the electric energy meter based on Hall element one of claim 1 ~ 3 Suo Shu, it is characterised in that described control module is single-chip microcomputer, DSP or FPGA.
7. according to the electric energy meter based on Hall element one of claim 1 ~ 3 Suo Shu, it is characterised in that described power module includes transformator, switching power source chip and linear voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620212025.2U CN205450108U (en) | 2016-03-21 | 2016-03-21 | Electric energy meter based on hall sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620212025.2U CN205450108U (en) | 2016-03-21 | 2016-03-21 | Electric energy meter based on hall sensor |
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| CN205450108U true CN205450108U (en) | 2016-08-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699764A (en) * | 2016-03-21 | 2016-06-22 | 威胜集团有限公司 | Hall-sensor-based electric energy meter |
| CN109633233A (en) * | 2018-12-21 | 2019-04-16 | 华为数字技术（苏州）有限公司 | A kind of Closed Loop Hall and detection method |
| CN111381099A (en) * | 2018-12-28 | 2020-07-07 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Device and method for testing alternating current loss of high-temperature superconducting strip and coil |
-
2016
- 2016-03-21 CN CN201620212025.2U patent/CN205450108U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699764A (en) * | 2016-03-21 | 2016-06-22 | 威胜集团有限公司 | Hall-sensor-based electric energy meter |
| CN109633233A (en) * | 2018-12-21 | 2019-04-16 | 华为数字技术（苏州）有限公司 | A kind of Closed Loop Hall and detection method |
| CN111381099A (en) * | 2018-12-28 | 2020-07-07 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Device and method for testing alternating current loss of high-temperature superconducting strip and coil |
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