High-precision synchronous acquiring device

Abstract

The invention discloses a high-precision synchronous acquiring device. The high-precision synchronous acquiring device comprises a voltage transformer, a current transformer, a gear shifting control and signal conditioning module and an A / D chip, wherein the voltage transformer is used for sampling voltage signals before the device is connected to an electricity meter; the current transformer is used for sampling current signals before the device is connected to the electricity meter; the gear shifting control and signal conditioning module is used for automatic gain control, filtering and amplifying of the signals sampled by the voltage transformer and the current transformer; and the A / D chip is used for carrying out analog-digital conversion on the signals sampled by the voltage transformer and the current transformer and transmitting the converted digital signals to FPGA for processing. The signals acquired by the device have time mark information, synchronous high-precision acquisition of electric signals is realized, by the voltage transformer and the current transformer, sampling precision of the device is ensured, meanwhile, strong current is completely separated from weak current, electromagnetic interference of the outside is greatly reduced, and reliability and safety of the device are improved; and moreover, the information not only can be used on a foreground in real time, but also can be compressed and packed to be transmitted to a background for various application and analysis.

Description

technical field [0001] The invention relates to the field of electrical signal acquisition, in particular to a high-precision synchronous acquisition device. Background technique [0002] Data acquisition is an important link in the signal processing process. With the rapid development of electronic technology, in the fields of on-line monitoring, on-line inspection, and electricity consumption information collection of electric energy metering devices, due to the expansion of the application range and the large amount of collected information, people The accuracy of the data acquisition device puts forward higher requirements. [0003] The traditional method of collecting electrical signals is mainly to collect voltage and current signals through ordinary transformers or through resistance voltage division, and the collection accuracy is generally poor. At the same time, due to the lack of synchronous signals, there are large errors in the data collected by multiple indepe...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of collecting electrical signals is mainly to collect voltage and current signals through ordinary transformers or through resistance voltage division, and the collection accuracy is generally poor.

At the same time, due to the lack of synchronous signals, there are large errors in the data collected by multiple independent acquisition devices. For the on-line monitoring and on-line inspection systems of electric energy metering devices, ordinary data acquisition devices are far from meeting the system accuracy requirements. requirements

Images