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Power meter design method and system based on giant magnetoresistive sensor

A technology of a giant magnetoresistive sensor and a design method, which is applied in the direction of electric power measurement by using electromagnetic effect devices, can solve the problems of large volume, easy to be affected by temperature, narrow bandwidth, etc., to overcome narrow bandwidth, low cost, and wide frequency band. Effect

Inactive Publication Date: 2018-12-28
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0003] In view of the above-mentioned defects of the prior art, the object of the present invention is to provide a power meter design method and system based on giant magnetoresistance sensors, using giant magnetoresistance sensors as power sensors, giant magnetoresistance sensors are a new type of high-performance The electrical detection element can measure both DC signals and high-frequency (MHz level) AC signals. The Wheatstone bridge structure is used inside, which overcomes the shortcomings of traditional sensors such as narrow bandwidth, large volume, and susceptibility to temperature. Wide range of application prospects

Method used

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  • Power meter design method and system based on giant magnetoresistive sensor
  • Power meter design method and system based on giant magnetoresistive sensor
  • Power meter design method and system based on giant magnetoresistive sensor

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Embodiment

[0048] Example: such as Figure 1 to Figure 4Shown; A power meter design system based on giant magnetoresistive sensor, which includes: voltage divider resistor, open magnetic ring, giant magnetoresistive sensor chip, signal amplification and zeroing circuit, control equipment and display equipment. The voltage divider resistor and giant magnetoresistance sensor are connected in series to both ends of the power supply, one end of the voltage divider resistor is connected to the power supply, the other end is connected to the power supply pin of the giant magnetoresistance sensor, and the ground pin of the giant magnetoresistance power supply is connected to the power supply ground. connect. Wind the wire of the load circuit on the magnetic field gathering ring, and the magnetic field gathering ring gathers the magnetic field generated by the load current and acts on the giant magnetoresistive sensor, and the giant magnetoresistive sensor converts the magnetic field into the ou...

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Abstract

The invention discloses a power meter design method and system based on a giant magnetoresistive sensor. A GMR sensor is used as a power sensor; electric power of a circuit is converted into a power supply voltage of the GMR sensor and a product of a measurement magnetic field through a proper circuit structure; and the electric power can be calculated according to an output voltage of the sensor.A control device collects the output voltage of the sensor, the output voltage is converted and then displayed on a display device, so that the circuit power can be seen visually. The GMR sensor is adopted as a power sensor, represents a novel, high-performance electrical detection component, can measure both DC electrical signals and high frequency (MHz level) AC signals, and adopts a Wheatstonebridge structure inside. The power meter overcomes defects that the traditional sensor has a narrow bandwidth and large volume and is vulnerable to temperature, has a wide band range, is easy to test, and can be widely used.

Description

technical field [0001] The invention relates to the technical field of electric energy measurement, in particular to a design method and system for a power meter based on a giant magnetoresistive sensor. Background technique [0002] In the context of the Global Energy Internet, smart grid has become a major research topic in global energy development and transformation, and is the development trend of the future power grid. Among them, advanced sensors and measurement technologies are the key to realizing smart grid monitoring, control, analysis and decision-making The foundation is also the key to the development of smart grid. Electric power measurement is one of the key technologies of electrical measurement. There are two traditional electric power measurement methods: time division (TDM) power measurement technology and digital sampling (DSM) electric power measurement technology. At present, domestic and foreign power measurement technology and theoretical research m...

Claims

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Application Information

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IPC IPC(8): G01R21/08
CPCG01R21/08
Inventor 陈文礼郑可侯兴哲邹波何蓓刘型志杨芾藜何珉籍勇亮宫林赵福平
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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