Control method for integrated nuclear magnetic resonance spectrometer data communication

Abstract

The invention specifically relates to a control method of the data exchange of an integrated nuclear magnetic resonance spectrometer, and the method adopts a large-scale programmable logic device FPGA aiming at the nuclear magnetic resonance and real-time needs of an imaging test thereof as well as each function module of the spectrometer, comprising a digital frequency source, a digital receiver, a gradient waveform generator and a pulse sequence generator, etc. The interior of the FPGA is constructed with an independent FIFO (or a dual port RAM), the data of the initial part of the sequence is firstly written into the FIFO according to the needs of the different pulse sequences, the data in each FIFO is carried out the real-time reading and is output and the corresponding function is further realized under the control of the pulse sequence generator. The control method has the advantage that one ARM chip is used as a CPU of the whole system, which is coordinated with the FPGA to work by a single bus, at the same time, all the function modules are controlled, then the whole nuclear magnetic resonance spectrometer system is concentrated on a single plate, the hardware of the system is not dependent on a PC machine, thus having more portable and smaller table type nuclear magnetic resonance spectrometer and having high integration level and saving development cost.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance, in particular to a control method for data exchange of an integrated single-board nuclear magnetic resonance spectrometer based on an embedded system (such as ARM). Background technique [0002] The nuclear magnetic resonance system is mainly composed of spectrometer, magnet, radio frequency power amplifier, gradient power amplifier, coil and other auxiliary parts. The spectrometer is the core component of the whole system, which controls the coordination between the various components of the system. In terms of functions, the spectrometer is composed of digital frequency source, digital receiver, gradient waveform generator and pulse sequence generator modules. According to the needs of nuclear magnetic resonance and its imaging principles, the real-time control requirements for each module are very high. In order to ensure better experimental results, the control accuracy of...

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Problems solved by technology

This method runs into problems when the pulse train data exceeds the storage cap...

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