Recombination current frequency sensor

Abstract

The invention relates to a recombination current frequency sensor. The frequency sensor comprises a single chip microcomputer module for performing fast Fourier transform computation on an electric signal detected by the sensor to obtain a current value and a frequency value, and converting the electric signal into an analog signal through the internal DAC to output to a signal amplification module; a signal collection module for conditioning and amplifying a signal of a Hall element; a signal amplifying module for performing signal amplification output on the DAC analog quantity output by thesingle chip microcomputer module; and a power supply module for providing a power supply source for the single chip microcomputer, and converting the input power supply voltage into the power supplyvoltage required by the single chip microcomputer module. The Hall element collection waveform is computed by adopting the fast Fourier transform, and the current and the frequency thereof can be computed and measured at the same time; by adopting a closed-loop effect of the Hall effect, the sensor has the features of being high in precision and good in follow-up characteristics. By adopting the internal potting sealing treatment, the sensor has the feature of being high in IP protection level and good in insulation characteristic.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a composite current frequency sensor. Background technique [0002] With the development of science and technology and the continuous improvement of productivity, electric energy, as a kind of clean energy, is widely used in daily production and life. Performance and access-free detection methods, the penetration rate in the industry is gradually increasing. [0003] The closed-loop or magnetic balance Hall current sensor is a sensor that uses the Hall effect to convert a large current into a secondary small voltage signal. Because of its wide measurement range, good electrical isolation performance, high measurement accuracy, good linearity, resistance It has the characteristics of strong interference ability of external electromagnetic and temperature factors, large current rise rate, fast response speed, strong overload capacity, simple and convenient installation, etc. It is...

AI Technical Summary

Problems solved by technology

[0004] However, the Hall current sensors currently on the market can only collect current data, and in many complex engineering applications, the frequency of the current is also a key parameter, and the same Hall sensor cannot measure current and frequency at the same time

The traditional measurement solution is to use two sensors to measure the current and frequency respectively, which results in lower space utilization and more cumbersome measurement steps.

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