Installation Of Equipment Research Articles

Design of a calibratable optical antenna system based on ring array light source

Abstract This study presents a multi-wavelength, multi-channel, and high-capacity optical antenna system. This approach is intended to allow parallel transmission with many channels and wavelengths by employing a ring array of vertical-cavity surface-emitting lasers, with reception accomplished via a ring detector array. The system employs spatially multiplexed techniques to send the target with numerous independent signals at the same time, effectively increasing bandwidth and reducing signal interference. The method used in this design provides benefits such as effective decreasing losses caused by blocking and removing aberrations. To overcome the spatial alignment difficulty caused by the array light source's tiny beam size during long-distance transmission, this study introduces a high-precision acquisition, pointing, and tracking system as a reverse communication channel. The system's wide beam can be used to align the installation of optical antenna equipment and facilitate information transmission.

IoT-Enabled Fire Alarm System with Cloud-Based Storage and Monitoring

Abstract: The purpose of a fire alarm system is to warn us of an emergency so that we can take precautions to safeguard ourselves, our employees, and the public. However, modern fire alarm systems require a significant amount of wiring and labor during installation. The most frequent issues that was encountered during monitoring commercial and residential fire alarm systems are false alarms, inappropriate installation, lost connections, malfunctioning or aged equipment, and careless maintenance that discouraged users from putting them in their houses as a result. Hence, the researcher developed an IoT-based fire alarm system connected to several types of sensors and micro-controller distributed over the building and house. Each of these nodes is made up of an Arduino microcontroller that is coupled with smoke, temperature, humidity, flame, methane, and carbon monoxide (CO) sensors. Thus, an innovative system is designed with the help of Internet of Things (IoT) that records live reading of sensors and stored in cloud interface which also lessens the investigation process of the authorities concerned. Results shows that majority of the evaluators responded to the functionality of the proposed system to be Superior and provide all the functionality required for the system to detect and prevent fire occurrences.

Information and Technology Governance Capability Analysis Using COBIT 2019: Case Study of CV Wirelessindo

The implementation of IT supports company sustainability. Large companies use IT as an integral part of their business model. Digital strategies must align with business strategies to achieve sustainability. Wirelessindo, established in 2007, provides IT solutions such as equipment, site surveys, network design and security, and tower installations. Its mission is to increase company productivity to win the competition in the era of Industry 4.0. IT is used to enhance customer service and internal business process efficiency. Initial investigations found issues with IT function mismatches, financial losses due to data loss, errors in IT equipment installation and configuration, and business process incidents caused by emerging risks. Identified root problems include employee knowledge gaps, risk management disparities, errors in defining business needs, and change management gaps. Based on these findings, IT governance evaluation was chosen as the research focus. This study aims to provide an overview of CV Wirelessindo IT capability levels and recommendations for improvements to meet expected levels. COBIT 2019 were used in this study. The General Manager, IT Division Manager, Software Development Team, Network Monitoring Team, Project Manager, and HR Manager were selected as respondents based on the Responsible, Accountable, Checked, Informed chart guidelines. Of the nine selected objectives, BAI08 showed level 0. APO12, BAI02, BAI06, BAI07, and DSS01 showed level 1. APO07, BAI10, and DSS03 showed capability level 2. Therefore, 61 recommendations were provided to raise the IT governance capability level to level 3 for all objectives.

CLOWN: The PASO Cloud Detection for Optimization of Automatic Optical Surveys

Orbiting space objects have become in the last decade a major nuisance impacting ground astronomy and orbiting space assets, from observatories to satellites and space stations. In particular with the rise of the satellite population in Low Earth Orbits, space objects are becoming an even bigger threat and a strong problem to astronomical observations. To tackle these threats, several coordinated surveillance networks composed of dedicated sensors (telescopes, radars, and laser ranging facilities) track and survey space objects, from debris to active satellites. As part of the European Space Surveillance & Tracking network, Portugal is developing the Pampilhosa da Serra Space Observatory, with both radio and optical telescopes dedicated to the Space Situational Awareness domain, deployed at a Dark Sky destination. To optimize telescope survey time, we developed CLOud Watcher at Night (CLOWN), an application interface that automatically monitors clouds in real time. This software can correctly trace cloud positions in the sky and provide accurate pointing information to the observation planning of the optical telescope to avoid cloudy areas. CLOWN only requires the use of an all-sky camera, which is already a norm in observatories with optical telescopes and can be used with any camera, including those for which no information about its model specification do exist. CLOWN does not require great computing power, and it does not require the installation of additional equipment. CLOWN results are very promising and confirm that the app can correctly identify clouds in a variety of different conditions and cloud types.

High-precision spatial measurement method of accelerator pre-alignment based on multiple total stations

Abstract With the development of accelerator technology, the scale of accelerators is becoming larger, ranging from hundreds of meters to several kilometers. For stable operation of accelerators, high-precision alignment, positioning, and installation are crucial. Installing all equipment inside the tunnel poses safety risks as personnel would be in a closed environment with potential radiation exposure for prolonged periods. To address the challenges of long adjustment and maintenance periods inside the tunnel due to the installation of equipment for large-scale accelerators, most accelerator devices under construction or in research have pre-alignment assemblies. Each assembly consists of a certain number of magnets distributed on girders. The magnets in one unit are pre-aligned with high precision in the laboratory and then transported to the tunnel. Aligning the entire magnet girder can significantly improve installation efficiency inside the tunnel. To meet the pre-alignment accuracy requirement of 10 μm in the horizontal and vertical directions for the magnet units in the high energy photon source (HEPS) storage ring, a system for high-precision pre-alignment of accelerator units using four total stations for angle observation has been designed in this paper. By employing different instrument layout configurations and incorporating reliable distance benchmarks, high-precision pre-alignment of the magnet are achieved. By arranging targets and utilizing recognition for automatic targeting, real-time point calculations during pre-alignment enhance efficiency. Subsequently, based on this system, pre-alignment simulation calculations and experimental verification of eight magnet focusing–defocusing units in the HEPS storage ring are conducted and ultimately realizing the 10 μm transverse and vertical pre-alignment measuring error within the units. This method, based on high-precision measurements in a small-scale space, reduces the period required for personnel on-site and improves pre-alignment efficiency. It also provides a reference for pre-alignment of multiple magnet units in large accelerators such as the Southern Advanced Photon Source and Circular Electron Positron Collider.

Methodological proposal for satellite communication on offshore self-elevating platform

The use of information and communication technologies has expanded the ways of working and communicating with others. However, these offer challenges when people or organizations are in places where communication is difficult. Self-elevating platforms and vessels with oil and fishing activities are in the middle of the sea, and the distance between them and the nearest port is very far. This affects the flow of information and communication that it generates to function properly. The objective of this work is to implement a satellite communication system for an offshore platform using various tools and equipment related to local area networks and satellite networks, specifically VSAT technology. The proposed and used methodology is based on experience and considers site analysis, site design, equipment installation and satellite communication tests. This has been tested in previous satellite link implementations. As a result, the parameters obtained in antenna pointing, isolation and latency tests are adequate and optimal. The applied methodology presents practical steps with specific results that can be replicated or adapted to any satellite technology implementation.

Effects of wire rope isolators on seismic life-cycle cost of UHV bypass switch

The seismic isolation devices reduce the seismic vulnerability of the electrical equipment. Accurately assessing the seismic life-cycle cost (SLCC) of the electrical equipment is beneficial in guiding the design and enhancing the seismic resilience of electrical substations and converter stations. To evaluate the effects of the isolator devices on the seismic life-cycle cost of electrical equipment, a SLCC evaluation model was proposed in this study, and the evaluation was conducted on an ultra-high voltage (UHV) bypass switch (BPS) with wire rope isolators (WRI). The model takes into account equipment purchase, maintenance, transportation and installation costs and indirect losses caused by power outages. Afterward, the SLCC and break-even time of the UHV BPS with and without WRIs in different regions were analyzed. The results indicate that beyond the break-even time, the BPS with WRIs becomes more economically viable. Moreover, its economic viability increases as the service life extends. Therefore, in high seismic cost risk areas, it is recommended to adopt seismic isolation devices to ensure the secure and economically efficient operation of electrical equipment.

An Early Management System for Subscriber Equipment Installation

The Journal revisits an historic paper from 1970 detailing the introduction of a computer-based Subscriber Installation Management Control System.

Experimental study on bioaerosols behavior and purification measures in a subway compartment.

Bioaerosols in public transportation systems raise critical environmental concerns, seriously threatening passenger health and safety. In this study, we investigate the spread characteristics of bioaerosols in a standard type-B subway compartment using both air sampling and sediment sampling methods. Additionally, without compromising indoor passenger comfort, two self-designed air purification devices, based on intense field dielectric (IFD) and dielectric barrier discharge (DBD) technologies, respectively, are successfully applied for the improvement of the subway air quality. The results show that bioaerosols can propagate rapidly throughout the entire compartment in 5min via airborne transmission. Under the effect of the symmetric air ducts and compartment structure, the difference in bioaerosol concentration in the air is less than 10% between both ends of the compartment. Concurrent substantial bioaerosol deposition on the ground, seats, and windows underscores the risk of contact transmission. Furthermore, the real-time purification rates of the two devices integrated into the air conditioning system reach 59.40% and 44.98%, respectively. With their demonstrated high efficiency in purifying bioaerosols and modular design featuring low energy consumption, easy cleaning, and reusability, these devices stand out as viable long-term solutions for large traffic vehicles. These research findings provide practical equipment recommendations and installation strategies for optimizing indoor air quality in subways and are applicable to other similar transportation systems.

A study of side shape analysis of free-form concrete panel using silicone mold and paraffin

This study analyzes the limitations of silicone molds used for free-form panel production and aims to address these issues by utilizing paraffin wax. Silicone molds are known for their reusability and ease of forming free-form shapes. However, the lack of a fixing method between the side and bottom molds makes them vulnerable to lateral pressure. Through FCP production experiments, 3D scans were conducted and shape errors were analyzed. The results showed that while the overall errors were uniform, errors exceeding 3 mm were observed at both ends of the curved sections. These errors are attributed to the installation of CNC equipment and the assembly process of the molds. Therefore, future research should focus on refining the corners and joints of the molds as well as validating complex curved shapes. This study is expected to serve as foundational data for research related to free-form molds.

Optimal Team for Diagnostic Imaging Equipment Installation

Optimal Team for Diagnostic Imaging Equipment Installation

Competency Model: Professional Development of Leisure Scuba Diving Instructors in China

Scuba diving specialization is a multidimensional index consisting of behavioral, cognitive, and affective domains. Based on the literature, the recreational scuba divers’ specialization was an interesting research topic to understand further the competency of leisure scuba diving instructors and prepare for their professional development. Leisure diving instructors need to carry out important duties such as teaching, underwater tour guides, safety protection, and equipment installation. The limitations of recreational scuba divers in China impact their specialization and competency as instructors. The study examined the qualities of an excellent leisure scuba diving instructor and the necessary professional enhancement they needed to become excellent leisure scuba diving instructors. Through qualitative methods, it revealed that leisure scuba diving instructors in China were 31 years old and older and possessed positive competencies in terms of their diving professional knowledge, skills, and attitude. However, they were average or unexceptional in their career opportunities, training, and mentorship and scored low in underwater photography, post-conference with students, and self-evaluations which were integrated into the professional development program as the output of the study.

BUILDING AND CONSTRUCTION RECONSTRUCTION DESIGN

In order to create the necessary conditions for life and development of society, the production of various products are organized. The nomenclature and consumer qualities of the produced products are determined by the level of scientific and technical development, economic and social living conditions. For the production of products, houses and buildings are erected, which are equipped with certain means of production. The term of functioning of means of production is due to physical and moral wear and tear of machines and mechanisms. Buildings and structures in, which means production are located and function also age physically and morally, although this aging occurs slower than the means of production.Scientific and technical progress is currently characterized by a faster onset of wear and tear of the nomenclature of manufactured products. In addition, in connection with the changes taking place in society, the nomenclature of manufactured products replaced. The problem of retooling the functioning industry (replacing morally or physically outdated means of production, the emergence of need to produce new types of products) arose before humanity a long time ago.Under reconstruction - the production of works, which carried out according to single project:- with a change in volume-planning decisions;- replacement or strengthening of existing structures;- demolition of existing and construction of new structures related to the operation of technological equipment;- with the replacement of obsolete or physically worn equipment;- with mechanization, production automation, etc. When carrying out the reconstruction of the main production facility, as a rule, significant volumes of work are always performed on auxiliary and service facilities.Reconstruction also includes the construction of new workshops and facilities instead of those, which being liquidated, the further operation of which is deemed impractical due to technical and economic conditions. They can be erected both on free territories and on areas vacated as a result of the liquidation (demolition) of the object.Technical re-equipment is clear as the implementation of a set of measures in accordance with the technical development plan of the enterprise according to projects and estimates for individual objects and types of work (without expanding existing production areas) to raise the technical level of individual areas of production, aggregates, and installations to modern requirements by introducing new equipment and technology, mechanization and automation of production processes, modernization and replacement of obsolete or physically worn equipment with new, more productive ones.Sometimes technical rearmament considered as a type of reconstruction with a relatively small amount of construction and installation work. As it is not difficult to see from the given definitions, new construction and expansion are in fact new construction, while the difference between them is only in the conditions of execution of works. Expansion of construction is carried out in difficult (compressed) conditions. Technical rearmament, as it was emphasized, mainly involves the organization of the dismantling of the old and the installation of new equipment on the existing foundations.In the future, the main attention will be paid to the issues of actual reconstruction, namely:- organization of works related to the strengthening of existing building structures, their replacement with temporary transfer of loads;- replacement of beams and trusses in areas of the covering located in areas difficult to reach for installation cranes;- by increasing the pitch of the columns without disassembly.

Application of FBG Sensing Technology for Real-Time Monitoring in High-Stress Tunnel Environments

In the process of tunnel construction, problems such as high-stress rockburst, large deformation of soft rock, water inrush and mud gushing, secondary cracking of linings, blasting interference, man-made damage, and mechanical damage are often encountered. These pose a great challenge to the installation of monitoring equipment and line protection. In order to solve these problems, the 2# inclined shaft of Muzhailing Tunnel in the Gansu Province of China, which exists under high stress, water bearing, and bias conditions, was taken as the research object in this paper. By assembling a string, drilling grouting and sealing, and introducing multiple modes of protection, new fiber grating sensor group installation and line protection methods were proposed. The automatic continuous monitoring of the deep deformation of surrounding rock and the automatic continuous monitoring of steel arch stress were realized. The field monitoring results showed that: (1) the fiber grating displacement sensor group could be used to verify the authenticity of the surface displacement results monitored by the total station; (2) the NPR anchor cable coupling support effectively limited the large deformation of soft rock and the expansion of surrounding rock in a loose circle, and the range of the loose circle was stable at about 1 m; and (3) the main influence range of blasting was at a depth of 0~5 m in surrounding rock, and about 25 m away from the working face. In addition, to secure weak links in the steel arch due to the hardening phenomenon, a locking tube was set at the arch foot. In the support design, the fatigue life of the steel was found to be useful as the selection index for the steel arch frame to ensure the stability of the surrounding rock and the long-term safety of the tunnel. The present research adopted a robust method and integrates a variety of sensor technologies to provide a multifaceted view of the stresses and deformations encountered during the tunneling process, and the effective application of the above results could have certain research and reference value for the design and monitoring of high stress, water-bearing, and surrounding rock supports in tunnels.

Time-varying cost modeling and maintenance strategy optimization of plateau wind turbines considering degradation states

Plateau wind power has great potential in reducing carbon emissions; however, compared with other renewable energy, its economics still need to be improved. As an effective approach to enhance its economic feasibility, maintenance strategy optimization aims to reduce maintenance costs per kilowatt-hour and extend equipment lifespan. This paper proposes a multi-objective optimization model for the maintenance decision-making of plateau wind turbines that considers the degradation state. It incorporates: i) modeling the maintenance process of plateau wind turbines by combining time-based and state-based methods; ii) considering the time-varying maintenance costs in complex environments; and iii) employing a multi-objective optimization method to find the optimal strategy that meets maintenance requirements. The complexity considered in the model mainly includes the randomness of the operating duration for each equipment state, the temporal variability of equipment distribution and installation costs, and the uncertainty in maintenance effectiveness. The proposed optimization method is applied to a wind farm in the Yunnan-Guizhou Plateau, China.The results indicate that traditional maintenance strategies underestimate maintenance costs and equipment lifespan losses. Compared with conventional maintenance strategies, this method can reduce equipment maintenance costs by 24.07 % and extend its operating life by 11.58 %. Additionally, this paper has conducted a series of parametric analyses to enhance the generalization performance of the model. The proposed method effectively addresses the economic issues of plateau wind turbine maintenance and provides a valuable decision-making tool for guiding the long-term maintenance of wind turbines in complex environments.

Unforeseen Situations During the Construction, Installation, Operation, and Modernization of HPP Equipment

Unforeseen Situations During the Construction, Installation, Operation, and Modernization of HPP Equipment

Способ улучшения зоогигиенических условий выращивания цыплят-бройлеров

Abstract. The purpose of the study is to study the effect of bedding material on the physiological parameters of broiler chickens. Since the most important condition for optimizing the microclimate in the poultry house is compliance with the physiological state of the livestock and maintaining its vital activity at an optimal level. Research methods. The experiment was carried out in the industrial conditions of a poultry farm on broiler stock of the Arbor Acres+ cross in the experimental workshop, where four sections were formed. The growth and development of broilers was monitored daily, livestock records were carried out, and a weekly veterinary report was compiled on the causes of mortality. Also, laboratory studies were carried out according to approved methods for the following indicators: ammonia content, sanitary and hygienic indicators of bedding material, volume, weight and moisture content of bedding material, as well as productivity and basic blood parameters of broiler chickens. Results. Trends in the positive effect of the sorbent in the form of modified diatomite on the productivity of broiler chickens due to the improvement of zoohygienic growing conditions have been identified. In particular, the content of the total number of microorganisms, mold spores and ammonia content in the production experimental workshop is examined in detail. During the work, the volume and weight of bedding material was calculated, including at the exit from the poultry house. We tried to pay special attention to blood biochemistry, which made it possible to assess the physiological state of broiler chickens and draw conclusions about the quality of feeding rations. At the same time, problematic issues associated with feeding poultry were identified, which affect the content of mineral elements in the blood. When determining the performance criterion, calculations were carried out using the EPEF index. Scientific novelty. For the first time, it was proven that the use of diatomite with a bulk layer height of 0.5–1 cm with a granule size of at least 5 mm as bedding material leads to improved zoohygienic conditions for raising broiler chickens without additional capital investments in the form of installation of expensive ventilation equipment or the use of additional technological operations. This replacement option has a positive effect on the health of young poultry.

Offshore geotechnical challenges of the energy transition

Offshore wind is the most mature of the offshore renewable energy technologies and has a significant role to play in the energy transition. 2000 GW of offshore wind capacity is anticipated globally by 2050 in order meet the targets of the Paris Agreement; 35 times the current installed capacity. The pace and scale of offshore wind ambitions to support the energy transition present a range of challenges for the offshore geotechnical sector and the broader offshore wind sector. Challenges extend across the life-cycle of projects from marine spatial planning, site investigation, design, manufacturing, installation, operation and decommissioning, and across the supply chain regarding availability of raw materials for foundations, anchors and mooring systems, vessels and equipment for site investigation and installation, and trained geotechnical personnel. This paper identifies five key challenges and sets out the necessary shifts in technology, culture and practice in geotechnical engineering to achieve the ambitious targets to deliver offshore wind at the pace and scale required for the energy transition. The paper closes with a reflection on the consequence of delaying or not meeting net-zero targets, and thus identifying the urgency for these shifts in technology, culture and practice to be developed and adopted.

Development of a Cost-Driven, Real-Time Management Strategy for e-Mobility Hubs Including Islanded Operation

The installation of electric vehicle supply equipment (EVSE) increases demand and peak loads, potentially straining existing energy distribution infrastructure. Dispersed and inadequately planned placement of charging points (CPs) can disrupt the electrical grid, surpass contracted demand thresholds, and require infrastructure upgrades, thereby incurring unfeasible costs for Distribution System Operators (DSOs). In this context, it is necessary to recognize the role of business models in enabling effective electrification of the transportation sector. In response to these challenges, this paper introduces a novel e-mobility hub management strategy, tailored for implementation in the Brazilian context. The proposed strategy revolves around a microgrid configuration encompassing dispatchable and photovoltaic generation, a battery energy storage system (BESS), EVSE infrastructure, and local loads. Moreover, this centralized controller facilitates the implementation of dynamic pricing and demand-response mechanisms, integral to business models seeking to integrate EVSE into the distribution grid. To validate the efficacy of the proposed solution, hardware-in-the-loop (HIL) simulations of the microgrid system are conducted. These simulations, incorporating the centralized controller, serve as a tool for assessing system performance and viability before on-site equipment deployment. Finally, this paper concludes with the insights gleaned from test analysis and its discussion through a selection of the most expressive scenarios, including islanded and connected operation modes.

Research on Parameter Correction of Distribution Network Model Based on CIM Model and Measurement Data

The construction of an energy distribution network can improve the system’s ability to absorb new energy, and its stable and efficient operation has become more and more important. The security and stability analysis of a distribution network needs accurate distribution network model parameters as support. At present, the installation of PMU equipment in China’s distribution network synchronous phase angle measurement unit is limited, which brings challenges to the parameter correction of the distribution network. In this paper, an automatic correction algorithm of distribution network parameters based on the CIM model and measurement data is proposed for the distribution network system without PMU. Firstly, the distribution network topology construction technology based on XML files and key fields of the distribution network is proposed, and the non/small impedance devices (such as switches) are merged and reduced. The breadth-first traversal algorithm is used to verify the connectivity of the constructed topology. Then, based on the topology construction and the least squares method, an iterative parameter correction technique is constructed. Finally, the accuracy and effectiveness of the proposed algorithm are verified in a standard IEEE 33-bus system distribution network and an example of the China Southern Power Grid. The topology connections constructed based on the CIM model have significantly enhanced the efficiency of parameter correction.