High-speed synchronous data acquisition solution based on ARM+FPGA

◆Application background

As we all know, most exploration and observation work is carried out in harsh environments, with high requirements for data accuracy and real-time performance, and in most cases, multi-parameter synchronous measurement is required. In view of the characteristics of exploration, measurement and control industries, Beijing Hengyi has launched a low-power, high-speed, high-precision, multi-channel synchronous data acquisition solution based on ARM+FPGA, which can complete the synchronous acquisition of multi-channel data and realize real-time network transmission according to the requirements of the monitor.

◆Application

Geophysical analysis field
Underground exploration field such as natural gas and oil
Observation technology field (seismic waves, spectrum analysis)
Power dispatching system

◆System architecture

Hengyi high-speed synchronous data acquisition solution has the following functional features:

1) Communicate directly with the acquisition terminal through the system interface to complete the data acquisition and A/D conversion of multi-channel analog and switch quantities at the industrial site, and realize the control of the data acquisition terminal;
2) The system is equipped with a FIFO cache module to support long-term continuous acquisition and storage of signals;
3) Support mobile storage of acquired data, and the acquired data can be accessed through a memory card;
4) Support 10/100M Ethernet or CDMA/GPRS wireless network, which can realize efficient network data transmission.

The system architecture is shown in the figure:

◆System hardware design

Hengyi high-speed synchronous data acquisition system mainly includes the following parts: ARM controller, storage circuit, FPGA logic control circuit, A/D conversion circuit, FIFO buffer, power supply circuit, interface circuit, etc.

The system has a multi-channel data acquisition interface, and the FPGA logic circuit controls the A/D acquisition and FIFO buffer module to achieve long-term uninterrupted data acquisition and data conversion; at the same time, the system has a wealth of peripheral control interfaces and communication interfaces, which can realize data storage and display, and complete RS485/RS232 or high-speed Ethernet data transmission.

The system hardware structure is shown in the figure:

◆System software design

The embedded operating system plays a vital role in the system. This solution relies on the high-performance Linux operating system to control the data acquisition terminal and realize real-time transmission and processing of data.