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A highly integrated, Field Programmable Gate Array (FPGA) based induction measurement system for conductive flow level measurement is presented. Exploiting under-sampling and digital I/Q demodulation techniques, the system use direct digital sampling and can operate at multiple frequencies (from 100kHz to over 10MHz). Details are discussed in both hardware and software aspects. Simulations and experiments...
In this paper we present a highly integrated, Field Programmable Gate Array (FPGA) based induction measurement system for low conductivity object applications. Exploiting under-sampling and demodulation techniques, the system can operate at higher frequencies (>10MHz) than previously reported. Details are discussed in both hardware and software aspects. Simulations and experimental results for...
This paper is mainly concerned with the estimation of the group delay in mixed signal system. Pipeline ADCs cause an inherent delay from the input analogue signal to the digitized signal it outputs. This delay is reflected as group delays in frequency domain. This paper presents an inline testing method based on FPGA which requires no external measuring system or device, which contributes to its convenience,...
Electromagnetic measurement has advanced rapidly in recent years because of its characteristics of non-contact and non-invasion nature. This paper presents an electromagnetic measurement system based on Field Programmable Gate Arrays (FPGA). The core of the system is a FPGA chip in which DDS, FIFO, digital demodulation module and MCU are embedded. The system consists of a flexible multi-frequency...
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