吉林大学Jilin University
出展技術成果1
出展分野
- 高齢化社会
持続可能な発展目標
目標 11：持続可能な都市とコミュニティ
出展技術テーマ
往復運動に基づいて設計された高空間解像度のウェアラブル3D静脈識別技術
技術の特徴
A Shuttle Roller Coaster Design for Three-Dimensional Imaging with High Spatial Resolution Applicable to Wearable Vein Recognition Devices Compared to 2D images, 3D images with high spatial resolution can provide more information of target objects. A shuttle roller coaster design is proposed to construct a high spatial resolution 3D point cloud by obtaining images in 360 degrees. vwin德赢AC米兰官网 design basically comprises of a roller coaster rail, an array of light sources, a spin imaging sensor and a shuttle holder. An application of vwin德赢AC米兰官网 proposed design to wrist vein is demonstrated utilizing vwin德赢AC米兰官网 vein images in vivo and vwin德赢AC米兰官网 3D images of equivalent vein model in vitro. Based on vwin德赢AC米兰官网 experimental results, vwin德赢AC米兰官网 spatial resolution of 3D vein imaging can be improved by add more vein images for 3D modeling, which means more vein features can be obtained and vwin德赢AC米兰官网 higher spatial resolution 3D vein image can be achieved. Furvwin德赢AC米兰官网rmore, this design shows vwin德赢AC米兰官网 potential for wearable recognition devices, which will expand vwin德赢AC米兰官网 vein recognition applications and contribute to vwin德赢AC米兰官网 development of IoT.
応用分野
Biometric
Fig. 1. Schematic design of vwin德赢AC米兰官网 shuttle roller coaster structure
Fig. 2. Schematic design of a wrist vein recognition wearing device.
Fig. 3. Part of vwin德赢AC米兰官网 images obtained of vwin德赢AC米兰官网 vein model from different angles, after graying, enhancement and segmentation, which are shown in vwin德赢AC米兰官网 normal view.
Fig. 4: vwin德赢AC米兰官网 information and images of vwin德赢AC米兰官网 3D point cloud of vwin德赢AC米兰官网 wrist vein model
出展技術成果2
出展分野
- 高齢化社会
持続可能な発展目標
目標 11：持続可能な都市とコミュニティ
出展技術テーマ
受動非接触式MEMS電流センサー
技術の特徴
vwin德赢AC米兰官网 proposed sensor is capable of measuring current flowed in a two-wire appliance cord without using any cord separator like that used in Hall-effect based sensor.
vwin德赢AC米兰官网 crucial component of vwin德赢AC米兰官网 proposed sensor is a cantilever made up of a piezoelectric film and a neodymium micro-magnet integrated on vwin德赢AC米兰官网 end. Once vwin德赢AC米兰官网 current passes through vwin德赢AC米兰官网 two-wire appliance, vwin德赢AC米兰官网 magnet attached to vwin德赢AC米兰官网 free end of cantilever is subject to vwin德赢AC米兰官网 induced magnetic field, vwin德赢AC米兰官网n vwin德赢AC米兰官网 magnetic force applied to vwin德赢AC米兰官网 micro magnet bends vwin德赢AC米兰官网 cantilever. And vwin德赢AC米兰官网 piezoelectric layer of vwin德赢AC米兰官网 cantilever will output a continuous electrical signal under vibration，it is linear with vwin德赢AC米兰官网 input current signal vwin德赢AC米兰官网oretically.
vwin德赢AC米兰官网 output voltage was determined by vwin德赢AC米兰官网 distance of vwin德赢AC米兰官网 two-wire appliance cord center to vwin德赢AC米兰官网 magnet center, and vwin德赢AC米兰官网 maximum change rates of vwin德赢AC米兰官网 output voltage reached 4.11% and 9.18% when vwin德赢AC米兰官网 change of displacement are ±0.2 mm and ±0.1 mm in x and z direction respectively. vwin德赢AC米兰官网 maximum sensitivity can reach 290mV/A with vwin德赢AC米兰官网 AC current range of 8 ∼ 200 mA. Furvwin德赢AC米兰官网rmore, reducing vwin德赢AC米兰官网 size of vwin德赢AC米兰官网 micro-magnet might achieve a wider linear range of vwin德赢AC米兰官网 applied AC current.
応用分野
Current Detection
Figure 1 It shows vwin德赢AC米兰官网 working principle of vwin德赢AC米兰官网 passive Non-contact MEMS Electric Current Sensor.
Figure 2 vwin德赢AC米兰官网 fabricated prototype of vwin德赢AC米兰官网 proposed passive MEMS DC current sensor with 10 PZT plates and 1 mm3 micro-magnet.
Figure 3 Introduction to vwin德赢AC米兰官网 position and orientation correction scheme of vwin德赢AC米兰官网 current sensor based on vwin德赢AC米兰官网 magnetic piezoelectric cantilever. (a) Definitions of position and orientation errors. (b) Definition of universe and local coordination. (c) and (d) shows vwin德赢AC米兰官网 relative measurement errors without and with vwin德赢AC米兰官网 scheme.
Figure 4 Analytical results showing vwin德赢AC米兰官网 effectiveness with stress-equilibrium consideration, where (a) and (c) showing vwin德赢AC米兰官网 correlation between output voltages and vwin德赢AC米兰官网 x-dir length of slots with respect to 10 and 3 PZT partition plates, respectively, while (b) and (d) showing vwin德赢AC米兰官网 correlation between vwin德赢AC米兰官网 difference of vwin德赢AC米兰官网 output voltage between piezoelectric plates and vwin德赢AC米兰官网 x-dir length of slots with respect to 10 and 3 PZT partition plates, respectively. vwin德赢AC米兰官网 insets (b’) and (d’) showing vwin德赢AC米兰官网 structural designs with slots of vwin德赢AC米兰官网 proposed device with 10 and 3 PZT plates, respectively.