Abstract
This article presents a novel and reliable low-cost data acquisition solution for high frequency and real-time applications in vehicular dynamics. Data acquisition systems for highly dynamic systems based on low-cost platforms face different challenges such as a constrained data retrieval rate. Basic data reading functions in these platforms are inefficient and, when used, they limit electronics acquisition rate capabilities. This paper explains a new low-cost, modular and open platform to read different types of sensors at high speed rates. Conventional reading functions are avoided to speed up acquisition rate, but this negatively affects data reliability of the system. To solve this and exploit higher data managing rates, a number of custom secure layers are implemented to secure a reliable acquisition. This paper describes the new low-cost electronics developed for high rate acquisition applications and inspects its performance and robustness against the introduction of an increasing number of sensors connected to the board. In most cases, acquisition rates of the system are duplicated using this new solution.
Highlights
Data acquisition systems (DAQ) acquire signals from different types of sensors in contact with the physical world
It can be observed that as soon when the different layers are included in the communication protocol
The conversion of the actual value of a sensor‘s measure into the ASCII code transmitted connected to a remote computer to transmit the data acquired in real time
Summary
Data acquisition systems (DAQ) acquire signals from different types of sensors in contact with the physical world. These systems acquire an analog signal and convert it to digital values for further processing. A DAQ is composed of one or several sensors that send an electrical signal to a circuitry to be conditioned and, subsequently, converted to digital values through an analog-digital converter. The physical magnitude that one wishes to measure significantly conditions the acquisition system to be used. It is important to determine if the measure you want to acquire changes over time and at what frequency. The physical system to be measured, determines the characteristics of the acquisition system that can be used to provide reliable data
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