Fig 8 - available via license: Creative Commons Attribution-NonCommercial 4.0 International
Content may be subject to copyright.
Source publication
Generally, traffic light systems are regarded as open loop control systems, that is, they are in continuous operation without any form of feedback that can help the system take a decision based on certain conditions. And so, this is specifically part of the reason why there exist high vehicular densities at roundabouts. Having considered in providi...
Similar publications
The implementation of safety functions, in contrast to ordinary control functions, requires a different approach to the design of the hardware and software of the control system. The reason for the different approaches is that each safety function must meet the required Safety Integrity Level (SIL). This has two aspects: safety integrity against ra...
Citations
... ② Integration of interdisciplinary disciplines: PLC control technology and knowledge of other disciplines can be integrated into the ideological and political education in the learning field [16]. For example, it can combine the knowledge of physics, mathematics, computers and other disciplines to carry out the principle and application of PLC control technology. ...
... The methodology was put to the test in real-world use cases and was successful in producing a number of high-calibre solutions. On Intelligent Traffic Control, Okoh et al. (2022) proposed a 4 Input/Output Programmable Logic Controller (PLC) in application to circuitry of a traffic light system. This provided feedback based on the signal from the input sensors linked to the PLC. ...
Following the rapid growth of cities,the continuous expansion of cities, too many vehicles competing for limited capacity transportation, Researchers on a daily basis are working tirelessly to solve the problem of road traffic congestion as it increases the increasing probability of accidents and has a negative impact on the environment. In this paper, we focused on MATLAB as it is far better (financially) than using commercial tools for traffic simulation adopting a Simulated annealing algorithm. We created an objective function which in turn generated the fitness or best values using the equation: f = inline 20(C1)4 + 16(C2)2., while the traffic model consisted of 14 radio buttons, 12 text boxes and edit boxes) splitting into a cross road and adjoining T-junction separated by a distance to make it coordinated. After the signal time cycle, there were six (traffic) phases, each showing the decongestion time and fitness function. In Case 1, the decongestion time was within the range of 9s and 41s, while the second’s was within the range of 2s and 58s. Further analysis revealed the relationships between generated fitness values and decongestion times. Another table was designed to show the analysis of the lanes’ decongestion times, the phases and cycles involved. It was shown that the six lanes were touched in at most two phases in the two cases considered. In future, researchers should compare the theoretical values to real-life cases, and include emergency conditions (ambulance & police vans).
... Smartphone as a sensor is being used to capture information for intelligent decision making in various activities including; health monitoring (Omodunbi et al., 2018), real time user status monitoring, e-commerce, environmental pollution and weather monitoring, positioning, road traffic monitoring (Okoh et al., 2022;Ali & Khusro, 2016), etc. Sensors are being developed in order to read data to be analysed and interpreted. There are several sensors that can be used to read the physical status of a person in distress through wearable devices or smart phones (Rodriguez-Rodriguez et al., 2020) such as accelerometer, gyroscope, microphone, proximity sensors, temperature readers etc. Smartphones are being used as sensors because of advantages it has such as costeffectiveness cost effectiveness (Boesing et al., 2013) and better power management as opposed to building dedicated devices and integrating several sensors or using traditional wireless sensor networks (Ali & Khusro, 2016). ...
Interpersonal violence is one of the causes of death globally. Getting help depends on timely response from responders. Development in personal safety technologies have been improved over the years due to the increase in the use of mobile technologies and the miniaturization of electronic sensors. However, existing technologies for communicating distress usually require active user interventions in alerting emergencies. Hence, this study proposes a system for the automatic detection and alert of distress situations arising from violent attacks through smartphone sensors. A fuzzy logic approach was adopted to classify levels of distress situation using input data values from tri-axial accelerometer, gyroscope, sound and proximity sensors. A prototype of the distress detection and alert process was implemented using Java programming language. The system prototype was implemented as an android based real-time application that detects and alerts distress using values from mobile device sensors. Testing the prototype showed that the system can automatically detect and send alert to responders using smartphone.
In modern railway systems, Programmable Logic Controllers (PLCs) play a crucial role, particularly in automatic level crossing systems. This project explores the application of PLCs in enhancing railway safety and efficiency. Three specific projects are investigated: automatic fault detection of railway tracks, an automatic railway gate control system, and a traffic light control system integrated with automatic railway gate crossing. The common thread across these projects is the utilization of PLCs for automation, ensuring precise and reliable operation in railway infrastructure.
