2007 Fiscal Year Final Research Report Summary
Construction of a Safety System by using Intelligent Structures
| Project/Area Number |
17560126
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Design engineering/Machine functional elements/Tribology
|
|---|
| Research Institution | Shibaura Institute of Technology |
|---|
Principal Investigator |
OKAMOTO Noriaki Shibaura Institute of Technology, Engineering Dep., Professor (40286696)
|
|---|
| Project Period (FY) |
2005 – 2007
|
| Keywords | Safety System / Adaptable Structure / Medical・Welfare-Service Robot / Skin Structure / Wall Buckling / Collision Safety / Tray-Carrying Cart / Shock Absorber |
|---|
| Research Abstract |
1. Construction of Safety Palpation Arm for Tele-ultrasound Imaging Diagnosis Robot
The goal of this study is to develop the arm structure which satisfies the various kinds of functions demanded for a palpation-arm as a tele-ultrasound imaging diagnosis robot and simultaneously is able to ensure intrinsic safety during its operation. The concept of a safety palpation-arm is proposed, based on a sequence of loadings during motion of a diagnosis robot In order to control the process of the resistance forces of the arm structure according to its concept, a framework was constructed with a reinforced skin box beam structure and a trigger causing local collapses. It is shown by experiments and FEA that the framework is verified to be useful to the safety palpation arm.
2. Construction of a Safety System of a Welfare-service Mobile Equipment for Collision with Human
Considering the low speed of this mobile equipment, this research proposes the design concept that prevents human damage from fall or crush after collision, by absorbing completely the impact energy with the large deformation of an absorber and the friction between braked wheels and the floor and simultaneously by reducing the impact force. Its concept is applied to the safety system for a large-size fray-carrying cart with function of keeping dishes warm or cold in a hospital and a welfare institution. Functional experiments for the safety system were carried out with a test cart constructed similarly to the tray-carrying one. It is shown by impact experiments with various situations of dummies that the safety system can control the impact fume between a human and the equipment less than the human pain tolerance and the conditions on human-fall determined experimentally as a function of critical speed, impact fume and friction between a dummy sole and a floor.
|
