background:   elevator-related accidents are uncommon, but can cause significant injury. however, little data exist on these types of accidents. to compile and analyze accident data involving elevators in an effort to eliminate or at least significantly reduce such accidents. methods: in this retrospective study we investigated 1,819 cases of elevator-related accidents during a four-year period...

We present a constraint programming formulation for the elevator trip origin-destination matrix estimation problem, and propose different approaches to solve the problem. An elevator trip consists of successive stops in one direction of travel with passengers inside the elevator. It can be defined as a directed network, where the nodes correspond to the stops on the trip, and the arcs to the po...

Elevator is an important transport medium in multi-storage building. With the development of better architecture technology, buildings are raising in height. Hence an elevator becomes an important medium of vertical transportation. There are several advantages of an elevator in the modern world. Hence more importance is given to the design of an elevator control system, which is easy for the ma...

The goal of this project was to design the vision system onboard a PR2 robot tasked with navigating between floors in the ICICS X-Wing at UBC. The vision task includes the detection and localization of elevator buttons that must be pressed in order to ride the elevator to a desired floor. The system is implemented in ROS, the Robotic Operating System from Willow Garage, and executed on the PR2....

This paper presents a robust and reliable method for a mobile robot to get on/off an elevator in a multistory building. Getting on/off the elevator requires the robot to perform two different tasks: a recognition task and a navigation task. First, we propose a recognition algorithm for the elevator buttons and status so that the robot reacts flexibly to the current elevator status. We first app...

Elevator traffic demand forecasting is the essential prerequisite for effectively implementing elevator group control system (EGCS). Considering that there exists lots of abnomal information in elevator traffic caused by subjectivity and occasionality in human behaviour and that observing traffic information continuously is costly and difficult, an improved grey forecasting based method using m...

We present a constraint programming formulation for the elevator trip origin-destination matrix estimation problem using a lexicographic bi-criteria optimization method where least squares minimization is applied to the measured counts and the minimum information or the maximum entropy approach to the whole matrix. An elevator trip consists of successive stops in one direction of travel with pa...

With the advancement of intelligent computerised buildings in recent years, there has been strong demands for intelligent elevator control with more sophistication and diverse functions. The design criteria of an intelligent elevator control system would include optimising the movement of a group of elevators with respect to time, energy, load, etc. In this paper, a new elevator group superviso...

An elevator fault diagnosis method based on Sequential Probability Ratio Test (SPRT) is proposed in this paper. In order to verify the effectiveness of the method, this paper designed the fault diagnosis experiment for elevator mechanical system. Firstly, the wavelet transformation is used to filter the noise of the vibration signal collected in the experiment. Then the kurtosis value of the fi...