TITLE: STATISTICAL INVESTIGATION OF ELEVATOR DAMAGES AFTER LARGE EARTHQUAKES IN TURKEY
AUTHOR(S): C. Oktay Azeloglu1, C. Erdem İmrak2, Ahmet Sagirli1, Ayşe Edincliler3, Hamit Kenan4, Yakup Artun1, Caner Yüksel5
1Yıldız Technical University, İstanbul, Turkey
2Elevator Technologies Laboratory, Faculty of Mechanical Engineering, Istanbul Technical University, Turkey
3Boğaziçi University, İstanbul, Turkey
4Antalya Bilim University, Antalya, Turkey
5Doğuş University, İstanbul, Turkey, PohlCon GmbH, Berlin
COUNTRY: Turkey
ABSTRACT: Elevators have expected to continue their services after earthquakes, especially in critical and strategic public buildings such as hospitals. However, from investigations carried out in the field after earthquakes, it is known that elevators are out of service due to damage to critical components. In this study, after large earthquakes in Turkey field investigations carried out on elevator installations are discussed and the structural elements of the elevators are classified and statistically expressed. The results obtained are shown graphically and the distribution of the damages in critical components is given. It is aimed to reveal which components should be focused on in elevator design for earthquakes and the points to be taken into account in elevator design for seismic test suit.

TITLE: AI IS FAR AWAY FROM LIFT COMPANIES – THE BASICS FIRST!
AUTHOR(S): Tom Chenna, Mainteny GmbH
COUNTRY: Germany
ABSTRACT: Artificial intelligence is on everyone’s lips. It has been compared t the invention of the light bulb. It is set to fundamentally change everything. After the initial hype, the industry is becoming disillusioned. We look after more than 100 lift companies and can confirm this: The industry is still as far away from AI as the moon is from the earth. In 70% of companies, work slips are still in paper. Even AI is powerless here. Companies must first get the basics right and digitalise their processes before the power of AI can be harnessed. And that will take time.

TITLE: INNOVATIVE SENSOR SOLUTIONS USING OPTICAL SEMICONDUCTOR TECHNOLOGY
AUTHOR(S): Beat De Coi, ESPROS Photonics AG
COUNTRY: Switzerland
ABSTRACT: The elevator industry faces growing demands for enhanced safety, efficiency, and predictive maintenance. ESPROS introduces novel solutions leveraging the OHC15L optical semiconductor technology, a highly advanced platform for developing precise, reliable, and compact sensors. Our innovations address key challenges in real-time people counting, obstacle detection, positioning, speed monitoring, enabling smarter and safer elevator operations. By offering accurate 3D imaging and high ambient light immunity, OHC15L-based sensors open the door to new possibilities in intelligent control systems, energy savings, and maintenance optimization. This presentation will explore cutting-edge applications and their impact on the future of vertical transportation.

TITLE: WHAT COULD GO WRONG WITH AN ESCALATOR?
AUTHOR(S): Dave Cooper, University of Northampton
COUNTRY: UK
ABSTRACT: Escalators are a preferred option for moving high volumes of passengers. There are millions of passenger journeys on escalators every day and compared to passenger numbers, accident rates are reasonably low. The fact of the matter is that design, maintenance and passenger actions combine to achieve passenger safety and the input from any one of these three factors can create an unsafe condition. Unfortunately, when some accidents occur, they can cause life changing injuries, but most accidents could have been prevented. The author will look at accidents and present actual CCTV footage and photographs from all three contributory categories.

TITLE: DIGITAL DOOR TWIN” TO IMPROVE ELEVATOR DOOR INSTALLATION QUALITY AND REDUCE ACCIDENTS DUE TO IMPERFECT INSTALLATION
AUTHOR(S): Giuseppe De Francesco, Wittur
COUNTRY: Italy
ABSTRACT: 70% of new elevator callbacks are due to doors. Building a digital door twin means several door installation features are detected by connecting data from car door operator electronics and several sensors. Collected data are analyzed in the cloud with especially developed algorithms and installation issues or errors are discovered and listed.
The presentation will elaborate on several strategies to detect errors from raw data and the implications of such controls at installation site before elevator commissioning. This approach may reduce elevator accidents due to imperfect installation and further raise safety level of new elevators worldwide.

TITLE: HOW TO IMPLEMENT CIRCULAR ECONOMY PRACTICES IN LIFT INDUSTRY
AUTHOR(S): Claudio Donghi, KONE Corporation
COUNTRY: Italy
ABSTRACT: In today’s world, where sustainability and resource efficiency are paramount, the concept of a circular economy has emerged as a transformative solution. The transition to circular economy addresses the pressing need to mitigate environmental risks, manage resource depletion, and respond to regulatory and consumer pressures for sustainability.
The new series of ISO 59000 standards are key documents being developed to establish a common framework and standardize the implementation of circular economy principles in organizations and business models.
This paper provides guidance on how to implement circular economy principles and practices in vertical transportation industry, highlighting challenges and opportunities. By adopting these standards, the lift industry can accelerate its transition to a circular economy, minimize resource use, and optimize the circular flow of resources, thereby contributing to sustainable development on a global scale.

TITLE: DOOR SENSOR-BASED SYSTEMS INCREASE ELEVATOR PERFORMANCE, MAINTENANCE EFFICIENCY AND CUSTOMER SATISFACTION
AUTHOR(S): Jan Giger, CEDES AG
COUNTRY: Switzerland
ABSTRACT: Labor shortage and passenger waiting times are two key challenges the vertical transportation industry is faced with. Door sensor systems are standard to almost all elevators sold nowadays. Such sensor systems historically served the important but sole purpose of protecting passengers and objects entering and leaving an elevator. Going forward, such sensor systems can provide immediate feedback on traffic flow in and out of an elevator cabin, recognize special objects as well as determine the health status of the elevator. Connected to the elevator controller and / or cloud services, the efficiency of both the elevator it’s the service can be enhanced based on the additional data provided. Even more benefit for the entire elevator system can be derived, if such systems are combined with emergency call functions or other elements essential to the proper functioning of the elevator or the satisfaction of the equipment owner and passengers.

TITLE: GENERATING ELECTRICITY FROM ELEVATOR PULLEYS
AUTHOR(S): Ehsan Heydari, Hydro plus hydraulics
COUNTRY: Iran
ABSTRACT: In this paper we explain about how we can get electricity from a renewable source in elevators. One of the main problems of the high-rise buildings is their high consumption of electricity in the building, while there is a hidden source of energy is their elevators. If we get accurate on the elevator pulleys in these buildings, we can understand that they are spinning so fast, and if we put an AC generator in front of them there would be a chance to restore at least a part of that energy that is being consumed for elevators and use it for another section. We shall show that there are lots of cities on this earth with so much high-rise commercial or residential usage. Each one of these buildings has at least five to ten elevators that can be a good power source for electricity.

TITLE: ENHANCING PASSENGER SAFETY: A FRAMEWORK FOR ASSESSING AND OPTIMIZING ELEVATOR BRAKING DISTANCES
AUTHOR(S): Shaik Javeed, AGMELCO ELEVATOR CO LLC
COUNTRY: Dubai UAE
ABSTRACT: Passenger safety is paramount in the maintenance of elevators and escalators. When a company assumes responsibility for a project, it must address various aspects related to inspections and proper maintenance protocols. It is essential, beginning with the pre-contract survey or immediately after the contract is signed, to ensure that all safety elements are functioning correctly. This diligence should be maintained during each subsequent monthly maintenance visit.
This paper aims to focus on the accurate determination of braking distances, as many lift manufacturers—except for a few—do not provide criteria for testing and verifying these distances within their controllers. This information will be beneficial for third-party maintenance companies in independently assessing safe braking distances, thereby enhancing elevator safety.
We propose the use of rope load cells to measure and calculate the empty cabin weight and counterweight balance ratio, as this data is often unavailable to maintenance companies. These weight inputs are crucial for accurately measuring braking distances, which are derived using a tachometer wheel that contacts the main traction ropes. By assessing both maximum and minimum stopping distances, we can effectively verify the safety of the elevator.

TITLE: HIGH-SPEED ROPE TRACTION DURING EMERGENCY STOPS
AUTHOR(S): Jaakko Kalliomäki1, Petteri Valjus1 and Erkka Kiviaho1, 1KONE Corporation
COUNRY: Finland
ABSTRACT: EN 81-50:2020 Chapter 5.11.2.3.2 specifies that friction coefficient in emergency stop reduces infinitely as a function of the rope speed. Experience shows that this is not necessarily accurate.
This paper studies the background of the emergency stop friction coefficient for conventional steel ropes, highlights certain deficiencies in the established calculation methodology, presents test results attained by laboratory and field testing and proposes guidelines for determining friction in emergency stops.
The emergency stop traction requirements have to be set so that they ensure an appropriate safety level while simultaneously avoiding excessive material or energy consumption in conflict with global sustainability targets.

TITLE: ENERGY-EFFICIENT ELEVATOR GROUP CONTROLLER WITH PASSENGER-DRIVEN SERVICE OPTIMIZATION
AUTHOR(S): Antti Korkealaakso1, Mirko Ruokokoski1, Juho Kokkala1, Tuomas Myllymäki2, 1KONE Corporation
COUNTRY: Finland
ABSTRACT: This paper introduces an energy-efficient elevator group controller with destination control that incorporates passenger preferences. An elevator group controller is responsible for assigning passenger calls to elevators, typically nowadays selecting the best elevator by optimizing service quality measures, such as minimizing average passenger waiting time. Recently, there has been growing interest in considering the energy consumption of elevators. However, service quality and energy consumption are often conflicting objectives, i.e., reducing energy consumption may result in longer waiting times for passengers. To strike a balance between these goals, energy-efficient controllers adapt to passenger demand, conserving energy during low-demand periods while prioritizing service quality and handling capacity during high-demand times. Some passengers, however, may prefer optimized service even during low-demand periods. This paper presents a destination control system that allows passengers to express their preferences regarding their ride, choosing between a service-optimized or energy-optimized elevator experience.

TITLE: RETHINKING THE ELEVATOR CONCEPT DESIGN, FRONT END PLANNING AND CRITICAL ASPECTS OF MAINTENANCE IMPORTANT FOR ELEVATOR IN BUILDINGS THAT SERVE SENIOR POPULATION
AUTHOR(S): Magdalena Krstanoski1, 1Everglades University, Construction Management, Sarasota, Florida
COUNTRY: U.S.
ABSTRACT: Planning and designing with consideration of the needs of the elderly population is critical for implementing accessibility when aging population shares the building environment with the general population.
Although anthropometry is many times viewed by collecting dimensional data or measurements only, the complexity of the discipline of anthropometry can have significant meaning when designing for the communities with accessibility and aging population in mind. Necessity for understanding, anthropology of space, proxemics and dynamics of space for the segment of population seniors with various degrees of impairment, people with Parkinson disease, people with disabilities, on Autism spectrum, are critical in order to design the vertical transportation systems and circulation areas around the elevating devices in which this segment of population is in function and utilizes it. In the existing buildings, understanding all these factors will contribute to better decision-making process when deciding on the transportation device maintenance needs.
Society demands are changing, perhaps with the same pace as aging population is increasing, stimulating the need for socio-environmental-technological decision-making process changes. Five practical guidelines can assist in the decision-making process in two aspects – the concept design phase and the maintenance phase, by discussing challenges between the design and can the same can influence the maintenance. These five principles will help navigate the complex nature of design, and utilization and outline the collaborative nature of long-term forecasting, planning and maintenance.
Accessibility to basic services and mobility is unbreakable part of the basic design solution and built environment. In the world of globalization, there are still centralized solutions that does not provide accessibility for all, senior ‘s mobility challenges are not addressed, and limitations in mobility can be observed. This research touches several aspects from designing with aging population and autism in mind, Parkinson disease mobility, mobility challenge to relationship between design approach, inclusiveness, regulation compliance, sustainable aspects, accessibility, mobility, and is much closely interrelated and must be addressed to develop a sustainable future.

TITLE: EVALUATING ENERGY EFFICIENCY IN VERTICAL TRANSPORTATION SYSTEMS
AUTHOR(S): V Jagadish Kumar, L’Avenir Consultancy pvt.ltd
COUNTRY: India
ABSTRACT: Vertical transportation systems, including elevators and escalators, play a critical role in modern buildings, contributing significantly to operational energy consumption. As urbanization drives the development of high-rise structures, the energy efficiency of these systems has become a focal point for sustainable building design and management. This paper evaluates energy
efficiency in vertical transportation systems by examining factors such as technological advancements, control strategies, and system design and the codal standards defined for the same.
The paper affirms the impact of regenerative braking, energy-efficient motors, intelligent scheduling algorithms, and predictive maintenance on reducing energy usage. It also considers the role of passenger flow patterns, building design, and occupancy levels in influencing energy consumption. Performance metrics, such as energy per trip and standby energy, are analyzed to provide a holistic view of system efficiency.
Emerging trends, including the integration of Internet of Things (IoT) technologies and renewable energy sources, are also explored. The findings underscore the importance of a comprehensive approach combining advanced technology, strategic design, and operational optimization to achieve significant improvements in energy efficiency.
This evaluation provides actionable insights for engineers, architects, and building managers, promoting the adoption of energy-efficient vertical transportation systems as a cornerstone of sustainable urban development.

TITLE: COATED STEEL BELT RELIABILITY STUDY-DIALOGUES WITH THE SECRETARY GENERAL OF CHINA ELEVATOR ASSOCIATION ZHANG LEXIANG
AUTHOR(S): Hongliang Liang, Lexiang Zhang, Aliang Lift Design Studio Ltd.
COUNTRY: UK
ABSTRACT: The size of a Permanent Magnet (PM) Motor is determined by the torque applied to it, as Torque = Driving Force x Radius. To minimize torque and thereby reduce manufacturing costs, the radius of the driving sheave should be as small as possible, thus, the coated steel belt was invented. Traditionally, the diameter of the sheave is based on the standard for steel ropes, which requires it to be at least 40 times the rope diameter (d). However, the steel wires in the belts do not fail; the problem lies in the damage to the sheaths. Therefore, this standard for steel ropes is not appropriate for determining the diameter of the driving sheave for CSB elevators. The CSB has an unstable friction coefficient; the longer it is in service, the higher the coefficient becomes, causing over-traction even with a D=80mm driving sheave. With this diameter, the belt would wear out very quickly, within 3-5 years, for lifts with a rise higher than 30 meters and a speed greater than 1.0 m/s. The wear and the over-traction contradict each other, which remains an unsolved technical problem. Therefore, the author suggests that the code and standard for coated belts should be reviewed and revised. New technology should be developed to achieve a lower friction coefficient, similar to that between steel ropes and the iron driving sheave. In the meantime, a means should be developed to reduce the wear of the coated steel belt.
Based on many years of experience as a manufacturer of safety brakes (including multiple global projects for leading OEMs in the industry), the paper aims to summarize the key factors that need to be taken into consideration when selecting safety components today (here based on type-tested elevator brakes) lease.

TITLE: PROBABILISTIC ASSESSMENT OF SEISMIC RESPONSE OF HOIST ROPES
AUTHOR(S): Takashi MATSUSHIMA 1, Keisuke MINAGAWA 2, Satoshi FUJITA 3
1 Graduate school of Saitama Institute of Technology)
2 Saitama Institute of Technology
3 Tokyo Denki University
COUNTRY: Japan
ABSTRACT: Snagging of hoist ropes on components in a hoistway is the most common type of earthquake damage to lifts. Predicting the response of ropes during earthquake by response analysis is an effective means of preventing rope snagging. However, there are various uncertainties in the response of ropes during earthquakes, e.g. seismic motion, building response, cage position, loading etc., and it is difficult to assess the rope response with certainty. Therefore, this paper deals with a probabilistic assessment of the seismic response of hoist ropes. At first, an analytical method of ropes based on the wave equation is introduced. Then, seismic response analyses with various condition are carried out. Finally, the analytical results are assessed by using probabilistic approaches.

TITILE: CORDLESS POWER TOOLS PROVIDE DATA FROM INSTALLATION SITE
AUTHOR(S): Dr. Michael Merz, Hilti Aktiengesellschaft
COUNTRY: Liechtenstein
ABSTRACT: How valuable is it to get automatic insight in the planning office about what’s going on at the installation site of your elevator? IoT technology enables power tools to upload data on its usage to the cloud and software makes it available as information for different purpose. Assignment of tools to workers supports information on who is working when on which site and what type of work did progress. Data gathering on site and provision of information to office happens fully automatic in the background without disturbing the work progress. This paper introduces to a new technology embedded into cordless power tools using IoT, cloud technology and software to provide real-time data from installation site to office as a basis for planning.

TITILE: MODELLING, ANALYSIS AND CHARACTERIZATION OF VIBRATIONAL FREQUENCIES OF ELEVATOR ROPES
AUTHOR(S): Sriram Rangarajan1, Heinz Studiger1, Michael Siegfried1 , 1BRUGG Lifting AG
COUNTRY: Switzerland
ABSTRACT: Modern elevator systems demand lower maintenance, less downtime and higher ride quality. However, premature failure and sub-standard performance of ropes is a major concern among the rope manufacturers and elevator maintenance personnel. An often-reported claim that affects the performance of the ropes, and the ride comfort is the rope vibration. Vibrations cannot be eliminated but can be minimized or avoided. Elevator systems typically have multiple longitudinal and transversal natural frequencies where the rope vibrations are severe. These have been identified and characterized with three variants of ropes namely steel core, mixed core and natural fiber core rope using theoretical modelling, analysis, MATLAB simulations and experiments on a laboratory test bench. The system transfer functions have been derived to characterize the longitudinal vibrational frequencies whereas the transversal vibrational frequencies are characterized by modelling them as travelling wave. Various sources of excitation for each mode of vibration have also been discussed.

TITLE: DESIGN AND ANALYSIS OF WIRE ROPE FATIGUE TESTING EXPERIMENTAL SETUP
AUTHOR(S): Mohsen Seyyedi 1, Adem Candaş 2, C. Erdem İmrak 3, 1,2,3Elevator Technologies Laboratory, Faculty of Mechanical Engineering, Istanbul Technical University
COUNTRY: Turkey
ABSTRACT: The design and build-up of an experimental test setup for steel wire ropes are discussed, focusing on the bending over sheave (BoS) fatigue mechanism. The setup focuses on factors such as tension, bending cycles, and sheave diameter effects on rope durability in operational conditions. The system ensures accurate force distribution and monitoring during the test cycles. Static analysis verifies the setup’s structural integrity under various load conditions, ensuring it meets the requirements for fatigue testing. Additionally, the logic behind the design is detailed, highlighting key parameters such as rope diameter, tensile load, and machine speed that influence the results. The contemplated and materialised test setup aims to enhance the understanding of fatigue behaviour in wire ropes, providing critical insights into their operational lifetimes and contributing to improved safety in industrial applications.

TITLE: TRUST AND CONFIDENCE IN OPTAMID® DEFLECTION PULLEYS
AUTHOR(S): Lothar Sieber, Röchling Industrial Xanten Gmbh
COUNTRY: Germany
ABSTRACT: Deflection pulleys are an integral part of almost all elevators. Traditionally, steel and cast-iron pulleys were used to deflect the steel wire ropes at the car and counterweight. Deflection pul-leys made of engineering plastics have also been used reliably for years. This also applies in particular to new load-bearing equipment such as plastic-coated ropes and load-bearing belts or straps. The significantly lower weight makes installation easier, increases the service life of the rope and reduces energy consumption.
The presentation looks at the history, areas of application and advantages of plastic pulleys using the example of the product Optamid®.

TITLE: OVERALL EFFICIENCY OF TALL BUILDING ELEVATOR SYSTEMS
AUTHOR(S): Marja-Liisa Siikonen, MLS Lift Consulting
COUNTRY: Finland
ABSTRACT: Analytical comparison of different control systems and elevator systems can be done by simulating passenger traffic in buildings. Single and double-deck systems are modelled in the building. Passenger calls are served by conventional and destination control systems. Pure up-peak, lunchtime and down-peak traffic patterns are fed to the selected building. In this article, constant two-hour traffic patterns defined by the ISO 8100-32:2021 are used. The elevator systems serve the given passenger calls as they are given. Statistics of passenger waiting and journey times are made for the simulation period. ISO 8100-32:2021 standard defines the demand where the service level is proper. The highest passenger demand where the simulated service level is still “proper” is selected for each traffic pattern. The lowest demand of the three traffic simulated patterns defines the overall handling capacity of the system. The results of different systems are then compared. According to the comparison, the double-deck destination system doubles the overall handling capacity compared to a conventional single-deck elevator system.

TITLE: IMPACT ON ELEVATOR PERFORMANCE DUE TO DEMAGNETIZATION OF THE PMSM
AUTHOR(S): Albert So1 and W.L. Chan2, International Association of Elevator Engineers (HK-China Branch)
1 Faculty of Arts, Science and Technology, University of Northampton
2 Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University
COUNTRY: Hong Kong
ABSTACT: More than two decades ago, most elevator drive motors were of the induction type though very often, the advanced field-oriented vector control methodology was adopted. Nowadays, almost all new traction elevators are employing the permanent magnet synchronous motor (PMSM) technology due to its capability of higher torque-to-size ratio and energy saving. However, permanent magnets are not permanent at all, as they gradually get demagnetized thus possibly downgrading the energy efficiency, which may not be easily noticeable because the power electronic drives automatically boost up the input power to meet the load demand. Such a phenomenon may trip the inverter drives due to overcurrent, which may bring about a safety concern, not to mention the extra energy loss. Further energy loss may elevate the operating temperature of the PMSM, thus further demagnetizing the permanent magnets. Moreover, the desirable energy saving performance of the PMSM is downgraded. In this paper, by using computer simulation, the authors will demonstrate the gradual deterioration of PMSM performance, in terms of both energy consumption and torque response, due to the gradual demagnetization of the permanent magnets. Maintenance professionals of elevator systems must pay attention to such demagnetization effect and replace the permanent magnets on time to make sure the PMSM based elevator drive is as efficient as brand new.

TITLE: THE NEW STANDARD EN ISO 8100-1/2 – EFFECTS ON ELEVATOR BRAKES
AUTHOR(S Sebastian Steinert, Mayr power transmission, Mauerstetten
COUNTRY: Germany
ABSTRACT: The draft for the new lift standard EN ISO 8100-1/2 was published in 2024. Among other things, it stipulates a static brake test every 24 hours for brakes in elevators. For control system manufacturers, this means implementing all technical requirements. Users must implement the tests accordingly in practice. But what requirement does the new standard impose on the elevator brakes themselves? Are higher braking torques necessary? What adjustments are required for the dynamic (110%) braking torque test, which is also required in the draft? As the market leader for safe elevator brakes, Mayr power transmission is already working on suitable solutions. The new modular brake system, which also includes a new noise damping concept, already fulfils the requirements of the new standard. The innovative damping system not only makes the brakes quiet as a whisper, but also has a decisive side effect: it ensures more stability and under certain circumstances more safety over the entire service life and enables reliable, intelligent brake monitoring – without any additional sensors. This monitoring not only helps to reduce or even completely avoid errors and downtimes, but also supports demand-based maintenance of the elevators in line with the workload and automated remote maintenance.

TITLE: WOODEN OUTDOOR ELEVATOR IN THE BUYUKADA CALLED ATATURK ELEVATOR
AUTHOR(S): Sefa Targıt1, Prof.Dr.C. Erdem İmrak2, Dr. Adem Candaş3, Mohsen Seyyedi4
1 Asray Company, Gebze, Kocaeli
2,3,4 Elevator Technologies Laboratory, Faculty of Mechanical Engineering, Istanbul Technical University
COUNTRY: Turkey
ABSTRACT: In Büyükada which is the largest of the nine islands comprising the Princess’ Islands in the Marmara Sea, there is an elevator installed for the visit of the Anatolian Club, which was founded in 1926 under the leadership of Atatürk, in 1936. The outdoor elevator for transportation from sea level to the hotel entrance defies the years with its wooden structure in a metal shaft. The elevator, which is referred to as the Atatürk Elevator, attracts attention with its steel structure and wooden components. In this study, the Atatürk Elevator, which is one of the historical elevators of Istanbul, is introduced in detail.

TITLE: AGNOSTIC 3RD GENERATION SMART ELEVATOR REVOLUTION
AUTHOR(S): Christian Erik Thoeny, CEDES AG
COUNTRY: Switzerland
ABSTRACT: Imagine an elevator never breaks uncontrolled down and the operating company is always, 24/7, in control. Train stations, Airports, Office Buildings, Hospitals, Housing Complexes and other Buildings which are under heavy pedestrian and goods traffic must not stop their service. But without an early warning system, an Elevator will inevitably, eventually break down. Wear and tear over time leads to unwanted shortfalls. The 3rd generation smart elevator sensor system, powered by cloud-based AI, will detect aging or defective components and alert the maintenance before they break. Hence the technician is enabled to fix the problem first time, having the right, potentially defective components at hand. A huge problem is the aging installed base; a significant share of elevators isn’t even capable to communicate due to their old controllers. The 3rd Generation, easy and cost-effective retrofittable, sensor fusion embracing cloud connected, eliminates this problem 100%.

TITLE: APPLICATION OF MACHINE LEARNING IN THE ANALYSIS OF MAGNETOINDUCTIVE DIAGRAMS FOR MONITORING WIRE ROPES
AUTHOR(S): Bruno Vusini, AMC Instruments srl
COUNTRY: Italy
ABSTRACT: Monitoring the health of suspension wire ropes is essential for ensuring safety and operational efficiency in elevators. One common technique for assessing rope conditions is magnetoinductive analysis, particularly of LF (Localized Fault) diagrams. However, interpreting these diagrams requires skilled technicians to detect hidden anomalies. Machine learning offers a promising solution to automate and improve this diagnostic process.
In this study, we applied machine learning algorithms to analyze magnetoinductive diagrams for defect detection in approximately 500,000 ropes, traditionally evaluated by our ISO 9712 experts. Our goal was to train a model to replicate expert behavior in interpreting LF diagrams, ensuring accuracy and reliability in diagnoses.
The algorithm, trained on labeled datasets, successfully identified defects such as section loss and broken wires. Validation results were highly encouraging, with diagnostic accuracy nearly matching that of human experts while significantly reducing analysis time. This approach automates rope monitoring, enhancing speed, efficiency, and scalability, and supports predictive maintenance for timely interventions.

TITLE: BUCKLING ANALYSIS OF REINFORCED GUIDE RAIL AGAINST BRAKING FORCE OF SAFETY GEAR
AUTHOR(S): Tomoyasu Watanabe, Hitachi Building Systems Co., Ltd.
COUNTRY: Japan
ABSTRACT: As large capacity elevators with tall traveling height exert a large force on the guide rails during safety gear activation, it requires special guide rails with larger cross-sectional area than standard parts, thereby leading to issues such as acquiring of raw material and the machining precision.
Particularly in high-speed elevators where riding comfort is a major consideration, thereby requiring the high straightness of the guide rails, it makes more economical sense to strengthen the guide rails’ rigidity by adding reinforcement than to adopt special guide rails.
In this paper, we will discuss suitable methods to affix structural steel to the back of the guide rails as reinforcements. In addition, we will also elaborate on the characteristics of the deformation mode and the buckling load of the reinforced guide rails, derived from the buckling analysis.