Data Acquisition System For Measurement Research Articles

Preliminary Design of a Climate Controlled Environmental Test and Measurement

Climate chambers play an important role in the design and testing process. Several different chambers have been built over the years, specialising in different areas. It means there is a wide choice on the market and as a consequence, parameters necessary for us limit when choosing the ideal test chamber. Our instruments might be subjected to several environmental effects which require a lot of time and effort to be tested. An example is the Mars rover. NASA's Perseverance Mars rover was equipped with 2 pieces of Li-ion battery packs and the old solar charging was replaced by RTG (Radioisotope Thermoelectric Generator) thus a generator feeds the electricity consumers of the rover. Temperature on the surface of Mars varies from -150 C° to 20 C°. In addition, there are huge storms at regular interval lasting for month sometimes. These storms cause great difficulties because, on the one hand, the main power source on older types was the solar panels, and storms can cover them with Martian dust, limiting or eliminating their power supply. On the other hand, large sandstorms can completely cover the rover, and once the sandstorm is over, the Mars rover has to free itself from its trap. In addition, there were many other factors that engineers had to consider in the design. It is a well-known fact that we are not able to consider all the possible environmental conditions in design, and it is also known that some measurements may be inaccurate, so the prototypes produced have to be tested on the ground. The ground tests must ensure that the operating conditions on Mars are maintained. Special test chambers have been developed for this purpose. [1] The aim of the authors is to design and build a prototype of a climate chamber of their own design. An important component of the chamber is a measurement data acquisition system, which allows the collection of measured data and their preliminary processing.

LPWAN Networks for Energy Meters Reading and Monitoring Power Supply Network in Intelligent Buildings

In this paper the idea of functioning of Building Management Systems and Object Management Systems in intelligent buildings is presented. New functionalities of intelligent buildings resulting from the introduction of microgeneration are described. Low-Power Wide-Area Networks (LPWAN) are characterized and compared. The selected Long-Range (LoRaWAN) technology is tested for its use for communication with energy meters and monitoring the power supply network in intelligent buildings. In the paper a new system for reading and monitoring the network is proposed, consisting of hardware, communication, and application layers. A key element of the system is a specially developed converter, which has been designed and tested in a real urban environment. Using our solution in practice could allow to change the architecture of a measurement data acquisition system to much more flexible and efficient.

Correlation of the fatigue impact resistance of bilayer and nanolayered PVD coatings with their cutting performance in machining Ti 6Al 4V

Abstract Titanium alloys are widely employed in aerospace and biomedical applications. During the cutting process of Ti 6Al 4V alloy, the material characteristics of high specific strength and poor thermal conductivity lead to a stress concentration occurred at the tool/chip interface, which may cause severe failure of the coated tools. Besides, the titanium alloy gives rise to serrated chips, whose thickness varies regularly in the cycle mode, which lead to the variation of cutting force and tool stress. So a cyclic impact with high frequency is applied on the coated tool surface, and this induces the fatigue fracture of coating. In this study, repetitive contact between the coating and Vickers diamond indenter through the high frequency cyclic impact tester was developed by employing the ultrasonic actuator device. High frequency cyclic impact testing has been used to study the impact resistance of the TiSiN/TiAlN bilayer coating and TiSiN/TiAlN nanolayered coating. Besides, stress concentration resulting in the failure of coatings can be generated by using the sharp Vickers indenter. The crack propagation in coatings was investigated by the scanning electron microscope (SEM), and the fracture processes of coatings were studied from the force measurement data acquisition system. In addition, the cutting performance of cemented carbide tools coated with these two coatings was evaluated in turning Ti 6Al 4V titanium alloy. The correlation between the fatigue impact resistance of coatings at high frequency and the wear behavior of coated tools under different cutting conditions was studied. It can be concluded that the TiSiN/TiAlN nanolayered coating showed better properties to resist fatigue impact at the lower impact load, but worse properties to resist fatigue impact at the higher impact load.

Prediction of a New Kind of MR Data

In the field of TD-LTE network problem analysis, compared with traditional methods such as DT(Driver Test) and CQT(Call Quality Test), MR (Measurement Report) has the advantages of comprehensive information and high efficiency, begins to get more and more attention and application. In order to solve the problem of limited open time of measurement data acquisition system, a data prediction method based on LSTM (Long Short-Term Memory) model is proposed. Selecting part of the MR parameters as the experimental object, training LSTM Model with measurement data in a district of Beijing. Experimental results show that the proposed method can predict MR data accurately. Compared with the traditional prediction model ARIMA (Autoregressive Integrated Moving Average Model), this method has lower prediction error and more stable generalization ability.

Design of Ethernet based data acquisition system for yaw rate and longitudinal velocity measurement in automobiles

Design of an Ethernet network compatible data acquisition system for the measurement of yaw rate and longitudinal velocity in automobiles is presented. The data acquisition system includes a base node and a remote node. The remote node consists of a micro electro mechanical system (MEMS) accelerometer, an MEMS gyroscope, an advanced RISC machines (ARM) CORTEX M3 microcontroller and an Ethernet PHY device. The remote node measures the yaw rate and the longitudinal velocity of an automobile and sends the measured values to the base node using Ethernet communication. The base node consists of an ARM CORTEX M3 microcontroller and an Ethernet PHY device. The base node receives the measured values and saves in a microSD card for further analysis. The characteristics of the network and the measurement system are studied and reported.

A new data acquisition system for Schottky signals in atomic physics experiments at GSI's and FAIR's storage rings

A new continuous and broadband data acquisition system for measurements of Schottky-signals of ions revolving in a storage ring has been implemented. This set-up is capable of recording the radio frequency (RF) signal of the ions that circulate in the storage ring with a sustained acquisition rate of more than IQ-samples per second. This allows several harmonics of the full momentum acceptance of a storage ring to be measured at the same time. The RF signal analyzer modules are complemented by further electronic modules such as counters, precision clocks and synchronization modules that facilitate a seamless integration with main experimental data acquisitions for atomic and nuclear physics. In this contribution, the setup and first results from a test run at the experimental storage ring at GSI, Darmstadt, Germany, are presented.

Design and Development of a Low-Cost Multisensor Inertial Data Acquisition System for Sailing

This paper presents the development of an inertial measurement data acquisition system intended for use in sailboats. The variables of interest are three-axis acceleration, three-axis rotation, Global Positioning System (GPS) position/velocity, magnetic compass bearing, and wind speed/direction. The design focus is on low-cost microelectromechanical systems-based technology and demonstrating the validity of these technologies in a scientific application. A prototype is constructed and submitted to a series of tests to demonstrate functionality and soundness of the design. Contributions of this paper include the novel application of inertial measurement unit technology to a sailboat racing application, the integration of all instrumentation, creative ruggedized packaging, and emphasizing the use of low-cost commercial off-the-shelf technology.

A Conceptual Model for Remote Data Acquisition Using SMSLib Software. Case study: Kivu Lake Water Level

This paper presents a design of a remote lake-water-level measurement data acquisition system via UMTS network. The system accomplishes the function of data processing and transmitting by the use of SMSlib software and a java application developed. A tree layer system is designed to achieve this work: a mobile station layer, UMTS network layer and a sensing part layer. The system is more flexible than using server based network. From a mobile phone, via a UMTS network layer an SMs is sent to a computer (PC) on which a pressure sensor is immersed in water and connected on other terminal. Then the computer replies to the request using an SMs after processing information about the level of water received from the sensor. As a low cost, good and high performance and easy maintainable data acquisition system based on SMSlib software , this type of data acquisition system can be applied not only in the fields of hydrological processes, but also in fields like civil engineering and in some more industrial requirements solutions.

Data acquisition system for measurements in free moving subjects and its applications

A low-cost, portable acquisition system for monitoring and processing human biomechanical parameters is presented. It is equipped with 16 input channels, each one linked to an external transducer by a suitable connector. Input signals from sensors are converted into a digital form by a 12-bit analog-to-digital converter and stored in a removable memory (memory card) respecting the PCMCIA standard interface, allowing the download of acquired data toward the host computer. The acquisition operating mode is programmable by a host PC, writing proper values into the memory card; then, the instrument acquires the defined number of channels at the selected sampling rate. The instrument is battery powered; then, it can be used in all those applications, like rehabilitation and sports medicine, where the freedom for subject movement is a constraint for the test. In fact, this instrument does not require an arranged environment for measurements, and it is not connected to a PC. Three sample applications are presented in which the instrument is used to evaluate human motor capability, physical parameters in amputees, and motor performance in athletes.

Real-time phase-selective data acquisition system for measurement of wave phenomena in pulsed plasma discharges

A novel data acquisition system and methodology have been developed for the study of wave phenomena in pulsed plasma discharges. The method effectively reduces experimental uncertainty due to shot-to-shot fluctuations in high repetition rate experiments. Real-time analysis of each wave form allows classification of discharges by wave amplitude, phase, or other features. Measurements can then be constructed from subsets of discharges having similar wave properties. The method clarifies the trade-offs between experimental uncertainty reduction and increased demand for data storage capacity and acquisition time. Finally, this data acquisition system is simple to implement and requires relatively little equipment: only a wave form digitizer and a moderately fast computer.

Round Robin Testing of RTV Silicone Rubber Coatings for Outdoor Insulation

This paper presents the results of round robin tests performed to evaluate the electrical performance of Room Temperature Vulcanizing (RTV) silicone rubber coatings used for improving the contamination performance of outdoor ceramic insulators. The test, performed in six different laboratories, included several salt-fog chambers and a tracking wheel. Most test facilities were equipped with an on-line data acquisition system for measurement of leakage current activity. Four generic formulations of RTV silicone rubber coatings applied on ceramic rods were evaluated. The results indicate a general consensus in the ranking of the coatings` leakage current suppression capability, despite the variation in the experimental conditions employed. This suggests that guidelines for a laboratory test for evaluating the RTV coating material`s electrical performance under contaminated conditions could be developed.

Operator Training Simulator: Algorithms and Test Results

The power system simulation in an operator training simulator (OTS) is made up of a periodic solution of the steady state power network synchronized with a solution of the slow dynamic behavior due to the power balance of the system. The periodicity of the static solution (the OTS cycle time) has to coincide with the data scan rate of a control center so that changes in the variables of the simulated system accurately mimics the actual measurement data acquisition system. The design of such a computationally demanding application requires many considerations almost all of which distill down to a compromise between accuracy and computation. A companion paper describes the models developed to obtain the required accuracy for such a simulation. This paper describes the algorithms developed to meet the computation times required for real time simulation. In a control center, the data acquisition system is usually designed to scan different classes of data at different scan rates. Although every system is different in detail, the AGC data (generator powers and tie-line flows) scan is the most frequent, typically around 4 seconds. This implies that the OTS cycle should be at least as fast as the AGC scan cycle. To achieve this on the size of computers normally used in control centers (it can obviously be done on faster processors) has been difficult for system sizes of say, 1000 buses. The main hurdle has been the simulation just following a large disturbance.

Operator Training Simulator: Component Models

The power system simulation in an operator training simulator (OTS) is made up of a periodic solution of the steady state power network synchronized with a solution of the slow dynamic behavior due to the power balance of the system. The periodicity of the static solution (henceforth, called the OTS cycle time) has to coincide with the data scan rate of a control center so that changes in the variables of the simulated system accurately mimics the actual measurement data acquisition system. Thus, if the computation time for one static solution and the dynamic solution for the cycle time, can be kept to less than or equal to the cycle time itself, then effective real time simulation is achieved. Obviously, a matching of the computer size to power system size is needed to ensure this real time simulation, assuming, of course, that the fastest available solution algorithms are used. The design of such a computationally demanding application as the OTS requires many considerations almost all of which distill down to a compromise between accuracy and computation. Thus, the models used to represent the various components of the power system have to be carefully chosen to provide adequate accuracy with the highest computational efficiency. Such models have been developed and refined over the years for such applications as power flow and transient stability. However, the requirements of an OTS are sufficiently different from these other applications that many of these existing models were not found to be directly usable without change.

Operator training simulator: algorithms and test result

The power system simulation in an operator training simulator (OTS) is made up of a periodic solution of the steady state power network synchronized with a solution of the slow dynamic behavior due to the power balance of the system. The periodicity of the static solution (the OTS cycle time) has to coincide with the data scan rate of a control center so that changes in the variables of the simulated system accurately mimics the actual measurement data acquisition system. The design of such a computationally demanding application requires many considerations almost all of which distill down to a compromise between accuracy and computation. A companion paper describes the models developed to obtain the required accuracy for such a simulation. This paper describes the algorithms developed to meet the computation times required for real time simulation. In a control center, the data acquisition system is usually designed to scan different classes of data at different scan rates. Although every system is different in detail, the AGC data (generator powers and tie-line flows) scan is the most frequent, typically around 4 seconds. This implies that the OTS cycle should be at least as fast as the AGC scan cycle. To achieve this on the size of computers normally used in control centers (it can obviously be done on faster processors) has been difficult for system sizes of say, 1000 buses. The main hurdle has been the simulation just following a large disturbance.

A fast charge digitizer and digital data acquisition system for measurement of time varying radiation fields

An instrument capable of recording and displaying radiation waveforms is described. The instrument is used to measure ionizing radiation fields of intensities from 1 mR/min to 1000 R/min and over the range of photon energies from 20 keV to 1.2 MeV. Results obtained from testing of typical diagnostic X-ray machines are presented.