2000 Fiscal Year Final Research Report Summary
Development and evaluation of a micro force sensor for the measurement of in vivo tension
| Project/Area Number |
11558114
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B).
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Biomedical engineering/Biological material science
|
|---|
| Research Institution | Ritsumeikan University |
|---|
Principal Investigator |
YAMAMOTO Noritaka Ritsumeikan Univ., Fac.Science and Engineering, Associate Professor, 理工学部, 助教授 (40210546)
|
|---|
| Project Period (FY) |
1999 – 2000
|
| Keywords | Biomechanics / In vivo measurement / In vivo tension / Tendon / Ligament / Micro sensor / Strain gauge |
|---|
| Research Abstract |
1. Micro force sensor of the plate spring type
The micro force sensor consists of a stainless steel plate spring (length 2 mm, width 1.5 mm, thickness 0.1 mm) on which a electric-resistance strain gauge is bonded. When the sensor is inserted into tendons and ligaments, a tension applied to their tissues causes the adjacent fibers to bend the plate spring. The bending strain is measured with the strain gauge. The in vivo tension in rat patellar tendon during treadmill running and jumping was measured using the sensor. As a result, the tension could be measured accurately.
2. Micro force sensor of the needle type
A needle is composed of three stainless steel plates (width 1.0-1.5 mm, thickness 0.1-0.3 mm, length 15 mm). The needle has a cantilever in the top. A electric-resistance strain gauge or fiber optic strain gauge is bonded on the cantilever. A tension applied to tendons and ligaments causes the adjacent fibers of the tissues to bend the cantilever. The in vitro cyclic loading was applied to the rat patellar tendon into which the sensor was inserted. The required output was stably obtained from the sensor.
|
