System Design of a Multichannel Automatic Test and Data Acquisition System for Digital Phased Array Antennas

In order to optimise maintenance and increase safety, the Royal Netherlands Navy initiated the development of a multi-channel on-board data acquisition system for its Lynx helicopters. This AIDA (Automatic In-flight Data Acquisition) system records usage and loads data on main rotor, engines and airframe. We used refinement in combination with model checking to arrive at a formally verified prototype implementation of the AIDA system, starting from the functional requirements.

Performance evaluation of PV powered solar tunnel dryer integrated with a mobile alert system for shrimp drying

With the development of space telemetry technology, it has brought forward higher requests for large capacity memory of hard recovered solid-state recorders. Therefore, data compression becomes more important. The compression feasibility and potentiality of telemetry data are examined by analyzing the statistical characteristics of actual telemetry data recovered from the recorder. Aiming at the disadvantages of present data format In data compression for multi-channel telemetry data acquisition systems, we introduce data packet structure and a real-time compression algorithm for low complex hardware design put forward accordingly. The principles and implementation of data package compression are described. Simulation results show that this technology can meet the requirements of multi-channel real-time data compression with high compression ratio and fast compression speed, which possesses great application values.

Aiming at a multi-channel data acquisition and transmission system based on FPGA, the design scheme, functional circuit and logic design method of the system are introduced in detail. The system uses FPGA as the control core to control TLC2543 analog-to-digital converter and complete the circulation acquisition of 11-channel analog data. The transmission end uses Ethernet chip RTL8201 to communicate with the upper computer, which can monitor the data changes of each channel. The correctness of each function module is verified by software simulation. The design can meet the requirements of multi-channel signal acquisition and transmission.

Typically, multi-single-element photoacoustic computed tomography (PACT) systems utilize numerous ultrasound transducers arranged in cylindrical or hemispherical configurations for detection, combined with a single diffuse light source or multiple sparse light sources to illuminate the imaging target. While these systems produce high-quality 3D PA images, they require complex, multi-channel data acquisition (DAQ) systems to acquire data from all transducers. These DAQ systems are often bulky and expensive, significantly limiting the clinical translation of PACT systems for patient care. In this study, we evaluated the feasibility of using a compact and cost-effective Texas Instruments analog front-end DAQ module for multi-single-element PACT systems. By imaging a simple 3D phantom, we demonstrated the capability of this affordable DAQ board, with reconstructed images showing promise for practical and economical solutions in PACT systems. This advancement paves the way for broader applications of PACT in both research and clinical settings.

A computer-based data acquisition and analysis system was developed customized to EMG measurement and analysis requirements. The system was designed as an assistive tool for researchers studying human electrophysiology and kinesiology. A user-friendly interface characterized by a great adaptability and compatibility with other similar existing software packages was implemented, enabling multichannel acquisition, data storage and analysis. The application integrates the most frequent processing techniques required by EMG researchers and analysts, as well as a number of advanced signal processing techniques adjusted to the features of the EMG signal. The system comprises flexible signal analysis and display modules, forming a fully operational tool that can be easily configured to serve any similar purposed measurement requirements.

The Versatile Automated Depot Test Station (VDATS) is a major component in solving the U.S. Air Forcepsilas Automatic Test System (ATS) proliferation concerns. VDATS addresses the proliferation issue by providing the capability to replace an estimated 260 depot-level test systems that assume 150 different configurations, as well as a large number of intermediate-level test systems.The Department of Defense (DoD) has invested billions of dollars in aging and increasingly obsolete ATS used to troubleshoot and diagnose components of military aircraft and weapon systems. The issues of increased downtimes, test system obsolescence, and nonportable Test Program Sets (TPS) further contributes to the DoD's continued reporting of spare parts shortages and the increasing impacts that ATS obsolescence has on the readiness of military aircraft and weapon systems. The VDATS provides a viable approach to resolving these issues. VDATS has an extensible designed-in expansion capability intended to support present and future Air Force workloads by providing an organically-developed ATS platform with a modular, open-systems architecture that is Flexible, Capable, Tailorable, and Sustainable. VDATS makes it technically feasible to now realize the laudable 1994 DoD policy goal stated in: Military Readiness: DoD Needs to Better Manage Automatic Test Equipment Modernization," GAO-03-451, March 2003.[1] VDATS meets this stated DoD policy goal of producing an ATS capable of supporting multiple weapon systems, aircraft, and eventually being interoperable between DoD services. In 2007 the Air Force's VDATS was officially designated as a DoD Standard Family of Testers, supporting the 2005 ATS Master Plan requirement meant to reduce ATS proliferation and life-cycle operations and support costs. This paper briefly examines the present-day issues and how the U.S. Air Force is resolving these with the VDATS program. It also explains the strategy to preserve present-day and near-future TPS re- host investments, while enhancing system capabilities to meet the Air Force's depot and intermediate-level ATS requirements for the foreseeable future.

A system of computer programs and hardware was developed by the Instrumentation Branch of the Morgantown Energy Technology Center (METC) to provide data acquisition and control features for research projects at the site. The Automatic Data Acquisition and Control System (ADACS) has the capability of servicing up to eight individual projects simultaneously, providing data acquisition, data feedback, and process control where needed. Several novel software features - including a data table driven program, extensive feedback in real time, free format English commands, and high reliability - were incorporated to provide these functions.

In order to meet the tomato color sorting system with the requirements of multi-channel data acquisition and real-time processing, [ ]firstly, a multi-channel color digital acquisition and processing technique program based on FPGA were proposed . Then, a multi-channel data acquisition and real-time parallel processing system was built. The RGB color sensors were slected as detection components and the FPGA chip EP1C3T144C8 was slected as a core of data acquisition and processing. Meanwhile, ports of signal acquisition and the solenoid valve control were adopted a two-way analog switch HC4051 for saving I/O ports of FPGA. Thirdly, under the modular design and module reuse principles, we developed all modules with VHDL Language in QuartusII development environment. Finally, RTL and time sequence simulation for the system were done. The results showed that the connections between the modules accord with control logics. [²»´o¶O accorded ¹ýE¥E½] The performance of system time sequencev are good, which can meet with the requirements of real-time processing of tomato color sorting. On these bases, we also conducted a tomato sorting test verification. The results showed that the average accuracy of sorting is 98.70% and coefficient of variation is 0.01. This results can meet requirements of production.

The VXIbus (IEEE-STD-1155) was the first widely adopted modular standard in the test and measurement industry. The adoption of the VXIbus standard led the way for the industry system integrators to achieve tremendous reductions in instrument size, ATS footprint, power consumption, cooling and overall cost. Automated Test Systems (ATS) designed and delivered for more than the last 20 years were fielded with a high percentage of VXI instrumentation. During that same time period, the test and measurement industry developed their new product lines leveraging advanced technologies from the PC industries leaving very limited resources to contend with product supportability issues for their VXI instruments. Unfortunately, as the VXIbus standard and its instrument support declines, system sustainment challenges grow exponentially. Today the VXI user's ability to maintain and support their ATS inventory is being challenged. With the large sums of money that have been invested in the ATS and TPS, to support operational objectives, the using organizations must deal with this evolving support problem. User organizations are experiencing lifetime management struggles to mitigate the impacts to their capabilities caused by critical vendors obsoleting VXI instruments and ending their support. The removal of VXIbus instrumentation increases risk impact to the ATS system dramatically since most ATS systems were principally fielded utilizing VXIbus instruments. The ratio of the VXIbus architecture instrumentation as compared to the total number of instruments in the test system is high. This ratio, in effect, amplifies the risk to the system due to obsolescence. Sustainment solutions to facilitate integrating merging industry standards seamlessly with the VXI standard can ease the transition impact by relegating the scope of a change to the INSTRUMENT level and away from the STANDARD level risk impact. In the case of VXI to PXI, or VXI to PXIe, a bridge technology that can identify and provide a path to resolve the impact to the instrument level will allow the ATS managers to accurately plan costs and manage risk while sustaining operational capability.

Electromagnetic launching system is composed of the Electromagnetic Railgun (EMRG) and the large-scale Pulse Power System (PPS). According to the different test requirements of PPS and EMRG, the special master-slave distributed data acquisition software for electromagnetic launching system is designed by using LabVIEW graphic language. The test host and the sub-machines are multi-channel transient data acquisition systems based on PXI bus. The host PXI is used to measure the comprehensive parameters of the EMRG in multi-physical field. All sub-PXIs are used to diagnose the discharge current signals of each Pulse Forming Unit (PFU). The database management software uses C# programming language to design a friendly human-computer interaction interface, and uses SQL Server software to establish and manage the database, which realizes the comprehensive management of experimental data, tasks and resources involved in the EMRG experiments. The experimental information and experimental data are classified and filed, and the experimental data can be queried, and the experimental results can be analyzed and compared. The data acquisition and experimental database management software has perfect functions, friendly user interface, convenient operation, good versatility, and can also be used in other experimental occasions.

Squeezed branch piles, which boast the advantages of great bearing capacity, small settlement, and good stability, are an important infrastructure in the foundation of buildings, and their safety state is related to the safety of the entire structure. As a non-destructive testing method, surface potential can be used to effectively evaluate the damaged state of a pile foundation without destroying its stability. On this basis, in this study, the characteristics of surface potential change during settlement and deformation of squeezed branch piles under graded loading were tested and analyzed with the aid of a self-made loading system of reaction beams and an LB-IV multi-channel potential data acquisition system. The results show that: Under graded loading, squeezed branch piles can produce surface potential signals whose intensity can well reflect the settlement and local failure characteristics of the pile foundation; The potential signals change in advance of load; and they fluctuate violently before local fracturing of squeezed branch piles. The unstable fluctuation of the potential signal can be regarded as a precursor to the fracturing of squeezed branch piles. The research results have positive theoretical significance and important application value for assessing the stability of both branch piles and their stress states on site and monitoring and forecasting the disaster of pile foundation instability.

Many Industries motivated to achieve smart ways to monitor and acquire plant parameters and control plant actuators remotely. A wireless data acquisition and control system can be used for realizing smart automation. Different technologies are used to transmit the sensor data wirelessly to remote data acquisition system. Bluetooth and ZigBee technologies are the widely used short term wireless technology. In Bluetooth technology, data can be sent wirelessly to remote location, with limited range and data transfer rate. In Bluetooth 5.0, the distance is 50-60 meters and the data transfer speeds of upto 5-10Mbps. Data transmission with ZigBee based network is also limited to its range and data transfer rate. The maximum range is approx. 70-100 meter and a maximum data transfer rate of 250Kbps. In order to overcome the limitations such as short range and lower data rate, a Wi-Fi based sensor network is proposed. i.e. the sensor data is transmitted to the internet server through Message Queuing Telemetry Transport (MQTT) protocol. To realize the system, different sensors are used and the sensor output is digitized through external Analog to Digital Converter ADS1115. I2C communication bus is used to establish communication between ADS1115 and NodeMCU. The Node-RED graphical programming tool is used to develop data acquisition and control software. This paper aims to change the inflexibility of wired system and develop a Real-time, High-speed, Multi-channel Wireless Data Acquisition and Control System. The proposed system is suitable for access Real-time data in anywhere in the world through MQTT server. Automatic/Manual control signal also can be generated from anywhere to actuate the load remotely.

Meteorological radiosondes are launched routinely to obtain lower troposphere soundings of temperature, relative humidity, pressure, and wind parameters. The ability to carry extra sensors considerably extends the usefulness and cost-effectiveness of each sounding, permitting research into other properties of the lower atmosphere such as ozone, radioactivity, and electric field. An inexpensive four-channel digital data acquisition system is described which fits within the Vaisala RS80-15L radiosonde, for integration with other sensors. Using a 12-bit analog to digital conversion, a microcontroller formats the voltage measurements obtained for serial transmission over the radiosonde’s UHF radio link at 300baud. Maximum sampling rate on one channel is 10Hz, which is reduced if multiple channels are sampled. The standard meteorological data telemetry is unaffected. During an entire flight in which the equipment experienced atmospheric temperatures from 4°Cto−55°C, the absolute error on a 5V fsd range was less than 15mV.

This paper describes a high-speed data acquisition and transmission system for millimeter-wave imaging based on optical fibre and PCIe interfaces, which includes a multi-channel analog-to-digital conversion module, a data transmission module, and a data reception module. The scheme can circumvent the inherent shortcomings of bulky volume, poor reliability, and inability of large-scale expansion of array channels caused by the multi-channel data transmission system using multi-strand SMA cables, and has the advantages of small volume, light weight, fast data transmission rate, and easy to upgrade the performance, etc. It can be widely applied to the multi-channel data acquisition and transmission system, and has a broad application prospect in the field of array imaging radar and sonar imaging.