Abstract

1. Shortcomings This method did not consider the change in shape of an object moving horizontally (not approaching the person). As the object moves and the shape changes the span covered by the laser may register a quick displacement change and end up setting a false alarm. This is because this computer program focused on velocity change of the individual points of the same object. Better Solution The new algorithm created was able to treat several point masses as one object and find the center of mass of the object. The algorithm could also find the penetration of the object into the span swept by the laser. The change in displacement should be calculated by the change in position of the center of mass and not the individual point masses. This as discussed solved the problem at hand. PHASE 2: Haptic and Psychological Experiments This experiments focused mainly on accessing the human response to stimuli. Several experiments were done using the vibration motors placed on different part of the body. A research on other published articles about human skin sensitivity was also done. This helped the team to decide on where to place the vibration motors. Results Motiondetection can be achieved by both mechanical and electronic methods. In addition to discrete, on or off motion detection, it can also consist of magnitude detection that can measure and quantify the strength or speed of this motion or the object that created it. Several experiments have been conducted in this field. Many products that use technology ranging from simple distance calculation to complex object detection [used guiding blind patients] are already out there in the market. Despite the availability of many products in the market that do measure real time distances, such as the speed camera, our team realized that none of the products technology incorporated the concept of tracking movement of objects around the person and then linking that to a vibration system that would alarm the user of any dangerous approaching objects. Abstract The project involved two phases we therefore set a project program that would simultaneously cover the two phases with the limited time we had. Method Introduction Inventions, Spring 2012, NYUAD Joseph Juma, DmitriyTretyakov, As. Prof: Haiwei Dong Discussion The project aims to create a product that decreases the number of accidents involving vehicles and workers in high noise workplaces (these include construction yards, harbors, mines etc.). The customers for the product will most likely be large companies specializing in manufacturing or involved in the primary sector where employees are usually exposed to an atmosphere where their senses cannot function optimally. The value of our proposal is both ethical and commercially exploitable. By coming up with a solution that decreases the number of accidents, the government can be approached for further funding in research on the product’s relevance in safety. In addition, the government can play an integral role in promoting the product by giving companies incentives to use to the product. Beltrator Project Our project uses the laser technology to detect moving objects within a range of 20 meters. The x, y position of every object is stored in a 1 by n matrix, that is updated every 0.02 seconds (50Hz). The laser spans an angle of 270 degrees and record position of points that are 0.5degrees apart. (a) (b) (c) (d) (e) (f) The Beltrator Project layout (i) (h) (g) EMS actuator PC LASER Arduino Experiment snapshots. (a), (b), (c) show the passing experiment. (d), (e), (f) show the approaching experiment. (g), (h), (i) show the crossing experiment. Vibration Motors The Human body responds to different stimuli differently. It is with this that our team decided to find solutions to the existing problem of Construction site accidents. The human capability to perceive his surrounding through hearing in a noisy set up, as the construction site is nearly impaired. But the skin sensitivity remains intact. It is with this knowledge that we developed our idea of the tactile belt. This belt uses the laser beam technology to detect any objects approaching the person at dangerous speeds. • PHASE 1: • Project Algorithm [first draft] (Real time). • There are two different modes of data collection; • In the first case the angle intervals is 0.5degrees with a frequency of 50Hz. • In the second case the angle intervals is 0.25degrees with a frequency of 25Hz. • The laser we used is LMS100-10000 produced by SICK Sensor Intelligence. It scans the environment object anticlockwise repeatedly and outputs range information for different angles as pairs. The specific parameters are shown as follows. The max range is 20m/18 m (at 10% reflectivity). This laser spans 270degrees span with a range of 25m. With the range and angle values we can deduce the x,y position of the objects in the span and store values in a matrix. • Moving Object Recognition • Having (ß, L) as the state variables the displacement change of every point of an object is taken into consideration. And using the time stamp the velocity change was calculated. (a) (b) (c) Motion detection pattern. (a) Case 1. (b) Case 2. (c) Case 3. Background Research • As the team would want to proceed further with this project, we would focus more on establishing the wireless interface. This would make it easy to interface several vibrational motors from one point control. We would also concentrate on reducing considerably the size of the product and make it as light and portable as possible. This would mean the use of even smaller vibrators and lasers. • As for the market strategy the team would try to: • Link and tap into existing network of safety garments producers • Allow the innovation flow into other spheres and not just construction • Present this knowledge to governmental offices around Abu Dhabi to kick start the program in Abu Dhabi before spreading wide to the world The project was to be concluded with a working prototype, which our team did a good team in making this possible. For the actuation we used the mobile phone vibrators. This phase is important once the signal is processed and that the situation demands the user to be alarmed. The user will not only be alarmed about the dangerous approaching object but also the direction of it.