Beta 1


Title Tyverisikring af cykler
Author Sztuk, Sebastian
Berg, Thomas
Supervisor Lenau, Torben Anker (Innovation and Sustainability, Department of Management Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2009
Abstract Every year more than 71.000 bicycles are reported stolen in Denmark. The Danish government does more and more to promote the growing bicycle culture in the big cities by improving the infrastructure and the facilities in general. This comes as a natural step towards protecting the environment, creating cleaner surroundings and a more healthy population. The massive number of stolen bicycles every year is in opposition to this positive trend. The objective of this project is to develop a user-friendly locking system that offers a better protection for the bicycle. By doing so we hope to decrease the massive number of stolen bikes every year. This master thesis started up by investigating the cause of the problem, the actors involved, the marked situation and the use of the bicycle in general. Based on this research we proposed the most probable scenarios of how bicycles are stolen today. The conclusion was that it is a more or less equal mix of the following: 1) Bicycles stolen mostly in the weekend by young people on their way home from a night out. In this case the bikes are usually unlocked. 2) Bikes stolen by people who need a bike and for some reason decides to steal one instead of buying one. They often choose a good bike and use tools to get it up. 3) The organised criminals who drive around in a truck at night and steal almost all the bikes from a street. They sell them later in Denmark or outside the boarder. 4) Insurance fraud and bikes trashed from backyards etc. With the knowledge of the context and how bicycles are stolen we started to generate ideas by using different kind of brainstorm methods and by looking onto biomimetics that gave us new and interesting inspiration of alternative ways to protect items. Through a morphological set up we made 6 concepts from all the ideas generated. These where evaluated on the basis of the main specification with the requirements and criteria for the lock plus an extensive online survey on the issue. The highest overall scoring concept was chosen. The main idea of this concept was a semi-automatic lock that can open from a distance by wireless technology. The locking is still manual but the whole system is keyless. It’s placed in the same way as most of the existing locks, but it sits more tightly around the frame and tire. This is combined with a feature that makes the lock extremely difficult to cut through. Overall it will give the bike a very high degree of protection and make the interaction with the bike and the lock very user friendly. The last part of the project focused on developing the chosen concept in details. We went back to the biological world and found and interesting mechanism and function in the claw of the crabs. The lock was created by inspiration of this animal. By doing a wide scale material test and technology research we step by step created the form, function and mechanism of the lock. We ended up using a kind of chemical defence that activates if the lock is violently broken. This feature also came from studying nature’s way of protecting things. The result is illustrated and described in detail. The issues regarding safety, approval from Varefakta, legal rights etc. are discussed in the end of part 3. Part 4 debates the different possibilities of getting the product to the marked and the circumstances we need to consider in this regard. Generally the product and business case looks very interesting and we are determined to pursue this after the master thesis.
Imprint Lyngby Denmark
Pages 131+bilag
Keywords Bicycle; lock; theft protection; biomimetics
Admin Creation date: 2009-10-11    Update date: 2009-11-21    Source: dtu    ID: 250987    Original MXD