곤충 - 기계 하이브리드 시스템 : 자유롭게 비행 비틀의 원격 무선 제어 (<em> Mercynorrhina의 torquata</em>)
Summary
This protocol describes the process of constructing an insect-machine hybrid system and carrying out wireless electrical stimulation of the flight muscles required to control the turning motion of a flying insect.
Abstract
무선 호환 디지털 전자 기기의 상승은 비행 곤충의 행동을 연구하기위한 작은 무선 신경 근육 레코더 및 자극의 사용을 묻는 메시지가있다. 이 기술은이 프로토콜에서 설명 살아있는 곤충의 플랫폼을 사용하여 곤충 기계 하이브리드 시스템의 개발을 가능하게한다. 더욱이,이 프로토콜은 시스템 구성 및 풀려 곤충의 비행 근육의 기능을 평가하기위한 자유 비행 실험 절차를 나타낸다. 데모를 위해, 우리는 제어 및 비행 딱정벌레의 왼쪽 또는 오른쪽으로 회전을 달성하기 위해 세 번째 겨드랑이 sclerite (3AX) 근육을 대상으로. 얇은 실버 와이어 전극은 딱정벌레의 각 측면에 3AX 근육에 이식했다. 이들은 무선 배낭의 출력에 연결되어 (즉, 신경 근육 전기 자극)는 딱정벌레의 앞가슴 등판에 장착. 근육은 (왼쪽 또는 오른쪽) 자극 측 교대 또는 stimulatio를 변화시킴으로써 자유 비행 자극했다n 개의 주파수. 근육이 자극 증가 주파수에 대한 등급 화 반응을 나타냈다 때 딱정벌레는 동측 측에 돌렸다. 주입 공정 및 3 차원 모션 캡쳐 카메라 시스템의 볼륨 조정을 각각 근육 손상 및 마커 트랙의 손실을 방지하기 위해주의 깊게 수행되어야한다. 무료로 비행에 대한 관심의 비행 근육의 기능을 공개하는 데 도움이 방법은, 곤충 비행을 연구하는 것이 매우 유리하다.
Introduction
An insect-machine hybrid system, often referred to as a cyborg insect or biobot, is the fusion of a living insect platform with a miniature mounted electronic device. The electronic device, which is wirelessly commanded by a remote user, outputs an electrical signal to electrically stimulate neuromuscular sites in the insect via implanted wire electrodes to induce user desired motor actions and behaviors. In the early stages of this research field, researchers were limited to conducting wireless recording of the muscular action of an insect, using simple analog circuits comprised of surface-mounted components1-3. The development of system-on-a-chip technology with radio frequency functionality enabled not only the wireless recording of neuromuscular signals but also the electrical stimulation of the neuromuscular sites in living insects. At present, a built-in radio microcontroller is small enough to be mounted on living insects without causing any obstructions to their locomotion4-13.
The development of the built-in radio microcontroller allows researchers to determine electrical stimulation protocols to induce desired motor actions to control the locomotion of the insect of interest. On the ground, researchers have demonstrated walking control by stimulating the neuromuscular sites of cockroaches4,12,14, spiders15, and beetles16,17. In the air, the initiation and cessation of flight were achieved using different methods such as the stimulation of the optic lobes (the massive neural cluster of a compound eye) in beetles7,9 and brain sub-regions in bees18, whereas turning control has been demonstrated by stimulating the antennae muscles and nervous system of the abdomens in moths11,19 and the flight muscles of beetles7,9,13. In most cases, a built-in radio microcontroller was integrated on a custom-designed printed circuit board to produce a miniature wireless stimulator (backpack), which was mounted on the insect of interest. This allows wireless electrical stimulation to be applied to a freely walking or flying insect. Such a microcontroller-mounted insect is what is referred to as an insect-machine hybrid system.
This study describes the experimental protocols for building an insect-machine hybrid system, wherein a living beetle is employed as the insect platform, and instructs on how to operate the robot and test its flight control systems. The third axillary sclerite (3Ax) muscle was chosen as the muscle of interest for electrical stimulation and demonstration of left or right turning control13. A pair of thin silver wire electrodes was implanted in both the left and right 3Ax muscles. Moreover, a backpack was mounted on the living beetle. The other ends of the wire electrode were connected to the output pins of the microcontroller. The backpack was small enough for the beetle to carry in flight. Thus, this allows an experimentalist to remotely stimulate the muscle of interest of an insect in free flight and investigate its reactions to the stimulations.
Protocol
Representative Results
Discussion
이 실험의 신뢰도에 영향을 미치는, 상기 주입 공정은 중요하다. 전극은 3mm 비틀 (주변 근육과의 접촉을 회피)의 크기에 따라 이하의 깊이에서 근육에 삽입되어야한다. 전극이 근처의 근육을 터치하면 바람직하지 않은 모터 행동과 행동은 주변 근육의 수축으로 인해 발생할 수 있습니다. 두 개의 전극이 아니라 더 단락이 발생하지 않도록 정렬되어야합니다. 용융 및 납땜을 사용하여 밀랍을 리플 …
Disclosures
The authors have nothing to disclose.
Acknowledgements
This material is based on the works supported by Nanyang Assistant Professorship (NAP, M4080740), Agency for Science, Technology and Research (A*STAR) Public Sector Research Funding (PSF, M4070190), A*STAR-JST (The Japan Science and Technology Agency) joint grant (M4070198), and Singapore Ministry of Education (MOE2013-T2-2-049). The authors would like to thank Mr. Roger Tan Kay Chia, Prof. Low Kin Huat, Mr. Poon Kee Chun, Mr. Chew Hock See, Mr. Lam Kim Kheong and Dr. Mao Shixin at School of MAE for their support in setting up and maintaining the research facilities. The authors thank Prof. Michel Maharbiz (U.C. Berkeley) his advice and discussion, Prof. Kris Pister and his group (U.C. Berkeley) for their support in providing the GINA used in this study.
Materials
| Mecynorrhina torquata beetle | Kingdom of Beetle Taiwan | 10 g, 8 cm, pay load capacity is 30% of the body mass Aproval of importing and using by Agri-Food and Veterinary Authority of Singapore (AVA; HS code: 01069000, product code: ALV002). |
|
| Wireless backpack stimulator | Custom | TI CC2431 micocontroler The board is custom made based on the GINA board from Prof. Kris Pister’s lab. The layout of GINA board can be found at https://openwsn.atlassian.net/wiki/display/OW/GINA |
|
| Wii Remote control | Nintendo | Bluetooth remote control to send the command to the operator laptop | |
| BeetleCommander v1.8 | Custom. Maharbiz group at UC Berkeley and Sato group at NTU | Establish the wireless communication of the backpack and the operator laptop. Configure the stimulus parameters and log the positional data. Visualize the flight data. | |
| GINA base station | Kris Pister group at UC Berkeley | TI MSP430F2618 and AT86RF231 | |
| Motion capture system | VICON | T160 | 8 cameras for a flight arena of 12.5 x 8 x 4 m |
| Motion capture system | VICON | T40s | 12 cameras for a flight arena of 12.5 x 8 x 4 m |
| Micro battery | Fullriver | 201013HS10C | 3.7V, 10 mAh |
| Retro reflective tape | Reflexite | V92-1549-010150 | V92 reflective tape, silver color |
| PFA-Insulated Silver Wire | A-M systems | 786000 | 127 µm bare, 177.8 µm coated, 3 mm bare silver flame exposed at tips |
| SMT Micro Header | SAMTEC | FTSH-110-01-L-DV | 0.3 x 6 mm, bend to make a 3 mm long slider to secure the electrode into the PCB header. |
| Beeswax | Secure the electrodes | ||
| Dental Wax | Vertex | Immobilize the beetle | |
| Insect pin | ROBOZ | RS-6082-30 | Size 00; 0.3mm Rod diameter; 0.03 mm tip width; 38 mm Length Make electrode guiding holes on cuticle |
| Tweezers | DUMONT | RS-5015 | Pattern #5; .05 X .01mm Tip Size; 110mm Length Dissecting and implantation |
| Scissors | ROBOZ | RS-5620 | Vannas Micro Dissecting Spring Scissors; Straight; 3mm Cutting Edge; 0.1mm Tip Width; 3" Overall Length Dissecting and implantation |
| Potable soldering iron | DAIYO | DS241 | Reflow beeswax |
| Hotplate | CORNING | PC-400D | Melting beeswax and dental wax |
| Flourescent lamp | Philips | TL5 14W | Light the entire flight arena with 30 panels (60 x 60 cm2). Each panel has 3 lamps. 14 W, 549 mm x 17 mm |
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