Multi-channel isolation digital oscilloscope based on optical fiber transmission

Abstract

The invention discloses a multi-channel isolation digital oscilloscope based on optical fiber transmission. The multi-channel isolation digital oscilloscope comprises an optical fiber medium, a bidirectional isolation module, a front-end input component, an FPGA compression module, a first photoelectric transceiver component, a second photoelectric transceiver component, an FPGA decompression module and an ARM data storage and communication module, wherein the front-end input component, the FPGA compression module, the first photoelectric transceiver component, the second photoelectric transceiver component, the FPGA decompression module and the ARM data storage and communication module are connected in sequence. The optical fiber medium is output to the first photoelectric transceiver component and the second photoelectric transceiver component. The bidirectional isolation module is connected with the FPGA compression module and the ARM data storage and communication module. Accordingto the invention, the front end uses modular design, and multiple channels are easily expanded; the front end uses FPGA to analyze and calculate data collected by ADC; waveform data are compressed, are transmitted to the ARM data storage and transmission module through an optical fiber transmission module for operation processing, and are finally displayed; and front-end data acquisition is controlled through a simple SPI isolation module, which has the advantages of efficient transmission control and low cost.

Description

technical field [0001] The invention relates to the field of oscilloscopes, in particular to a multi-channel isolated digital oscilloscope based on optical fiber transmission. Background technique [0002] Oscilloscopes are inevitably used in the production measurement of the electronics industry. However, most oscilloscopes on the market share the same ground with the mains or the device being measured. In this way, in some occasions where floating measurement signals are required. Engineers had to carry a bulky mains isolation transformer to levitate the oscilloscope's power supply to make floating measurements. In addition, there are some more demanding measurement applications, more than one floating ground, and there may be N floating ground signals that need to be measured. The bandwidth of multi-channel isolated oscilloscopes on the market is more than 200M. And the cost is higher. There are few multi-channel isolated oscilloscopes with a bandwidth of 200M to 500...

AI Technical Summary

Problems solved by technology

The delay in the transmission of data brings about the complexity of software processing, thus sacrificing the authenticity of the waveform

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