Development of a High-Speed Data Acquisition Card for Partial Discharge Measurement

Abstract

This study Development a high-speed data acquisition (DAQ) device by using AD9226 analogto-digital converters, a field programmable gate array, and an ARM Cortex-A8 microprocessor for a selfdesigned synchronous 6-channel high-speed DAQ card that was able to transmit data to a computer through its network interface. Its cost was approximately 10% that of a commercial model, the National Instruments PXI-5105, and thus overcame the prohibitively high cost of commercial DAQ cards. A high-frequency current transformer (HFCT) was used to measure three types of typical partial discharge (PD) in self-made models to compare the performance of the self-designed DAQ card and that of the National Instruments PXI-5105. The HFCT signals were converted into three-dimensional PD patterns, and mean discharge was chosen as the feature to be extracted for the application of extension theory in the recognition of discharge models. The results revealed that the self-designed DAQ card was comparable to the commercial model in the recognition of high-frequency PD signals. Given the high price of commercial high-speed DAQ devices, the self-designed DAQ card was deemed to have considerable advantages in cost and expandability.INDEX TERMS Data acquisition card, extension, feature extraction, partial discharge.

Performance Comparison of PD Data Acquisition Techniques for Condition Monitoring of Medium Voltage Cables

“…The vertical resolution refers to the number of distinguishable digital levels, expressed in number of bits, while the horizontal resolution refers to the sampling rate expressed as samples per second. During our different studies in laboratory environments, 8-12 bits DSOs (corresponding to 2 8 -2 12 (256-4096) vertical levels) with a sampling rate of 1-5 × 10 9 samples per second (GS/s) are considered to be suitable for reliable acquisition of PD data. Considering different characteristics of the PD mechanism and propagation discussed earlier, two data acquisition methods are presented below.…”

“…Recent work presented in [12] develops a high-speed data acquisition card for phase resolved partial discharge (PRPD) measurements. The measurement system with a bandwidth of 60 MHz is developed using analog-to-digital converters, a field programmable gate array, and a microprocessor to capture different types of PD signals such as internal, corona, and surface discharge.…”

Research on a Partial Discharge Expert System for the Diagnosis of Damaged Transformation Equipment

“…The hardware architecture of the homemade partial discharge analyzer, as shown in Figure 1, is divided into two main components: the data-acquisition module and the embedded system. We designed and improved the data-acquisition module based on the literature [20]. As Figure 2 shows, there are six analog synchronization input channels, the resolution of each channel is 12 bits, and the maximum sampling rate is up to 65 MS/s, with 256 MB DDR3 memory; each piece of data is calculated by using bits, and up to 67,108,864 datapoints can be stored.…”

Design and Performance Analysis of an Ultrasonic System for Health Monitoring of Concrete Structure

“…The ultrasonic transmitter module uses a full-bridge drive circuit to generate square wave pulses to excite the probe. The receiving module includes an operational amplifier and a filter circuit, used to amplify the detection signal and reject the high-frequency noise [ 25 ]. Figure 1 is a physical map including each part of the presented detection system in this paper.…”

“…The system uses the ADI analog-to-digital converter AD9226. This ADC has rich characteristics, e.g., single power supply, 12-bit precision, 65MSPS high-speed, 475 mW low power consumption, and 69 dB high signal-to-noise ratio [ 25 ].…”