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成果報告書詳細
管理番号20180000000176
タイトル*平成29年度中間年報 IoT 推進のための横断技術開発プロジェクト 超低消費電力データ収集システムの研究開発2(アルプス電気株式会社)
公開日2018/6/2
報告書年度2017 - 2017
委託先名アルプス電気株式会社
プロジェクト番号P16007
部署名IoT推進部
和文要約
英文要約Title: Project to develop cross-sectoral technologies for IoT promotion/ Development of Ultra Low Power Data Collection Systems(ULP-DCS)
Commissioned part: Research and development of autonomous power supply modules

(1) Development on wider range vibration power generator module
1. We conducted benchmarking and verified the practicality evaluation method in the constructed evaluation environment by obtaining measured values that are not much different from the published values.
2. A vibration generator module capable of taking out to the outside was fabricated and the broadband property was confirmed by comparison using the above result 1.

(2) Technology development on resonance-type vibration energy harvester
1. A magnetically-sprung nonlinear harvester developed in FY 2016 was presented and achieved wideband resonance with 29Hz-32.5Hz bandwidth. Further, a low-loss nonlinear harvester using leaf-springs and stoppers was developed, and achieved significant wideband resonance with 50Hz-75Hz, which was 20 times broader than conventional. For those harvesters, the response stabilization control was applied and successfully stabilized the high-energy response.
2. Manual tuning mechanism of magnetically-sprung harvester that can change the natural frequency in a frequency of 20Hz-65Hz was established. EPM-based autonomous tuning was proposed and it was confirmed through a preliminary experiment that the mechanism could change the natural frequency of the harvester by activating the EPM.

(3) Technology on high efficiency Rectenna
1. The rectenna with 2kΩ impedance for three bands on DTV, mobile phone and WiFi bands were designed, fabricated and evaluated at two times.
These rectenna have been achieved higher efficiency than the target value of 10@-30dBm in both DTV and mobile phone bands.
For the WiFi band at 2.4GHz, it has been confirmed by the simulation results of 10% or more.
We designed and evaluated multiband antenna which can cover a wide range from DTV to WiFi band and obtained characteristics as designed.

(4) RF power measurements at real fields and survey on specifications on artificial radio wave power space.
1. We have completed the analysis and field measurements of DTV, mobile phone, WiFi with new antennas.
2.3. From the above results, it become clear that the power obtained is very small even covering a wide range of three bands are considered.

(5) Development on wide-band wider range of Hi-Z high efficiency Rectenna
1. We completed the design and prototyping of the 10 KΩ folded dipole antenna for three bands of DTV, mobile phone and WiFi.
2. In order to derive the performance of the high impedance antenna, it is important to cancel the parasitic capacitance and direct matching of the antenna and the circuit is essential for matching.
3. Design and prototype of rectifier circuit using 200 nm SOI has been completed. Using the obtained diode parameter, we obtained the simulation result that 10% @ 30 dBm including 2.4 GHz band can be achieved.
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