Efficiency optimization of wireless power transmission systems for active capsule endoscopes

Jia, Zhang; Yan, Guozheng; Jiangpingping,; Wang, Zhiwu; Liu, Hua

doi:10.1088/0967-3334/32/10/005

Cited by 40 publications

(41 citation statements)

References 22 publications

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“…Although, the intensity of the generated magnetic field depends on the magnitude of the TC driving signal, the uniformity of the field depends completely on the type and the design structure of the TC [64]. In general, they are two types of TC which include solenoid coils [12,36,61–63,65–69] and Helmholtz coils [30,33,70]. The solenoid coil can be arranged in four different forms: (i) single solenoid [65]; (ii) a pair of solenoids [67]; (iii) a pair of double layer solenoids [12] and (iv) segmented solenoids [63].…”

Section: Wpt System For Wcementioning

confidence: 99%

“…The commonly used ferrite cores are 3F4 of Ferroxcube (μi = 1000) [71], R5K (μi = 5000) [62] or R10K (μi = 10,000) [12] of DMEGC Magnetic Co., Ltd., Zhejiang, China.…”

Section: Wpt System For Wcementioning

confidence: 99%

“…The level of stability for d 0 and r 0 depends on the TC design while the stability due to α relies on the RC design. It can be seen from the Table 6 that in term of d 0 /r 0 , Helmholtz coil-based systems [33,70] have better stability (maximum 83% stability) in comparison to the solenoid-based systems [12,65] which possess a maximum 40% stability.…”

Section: Overview Of Existing Wpt Systemsmentioning

confidence: 99%

“…For over a decade, since the invention of WCE [12,13] it is the only technique that can allow direct visualization of the full length of the GI tract including the small bowel for many pathologies [9,14,15]. Thus far, several clinical products have been developed [16–18] with different specifications and for use in different parts of the GI tract.…”

Section: Introductionmentioning

confidence: 99%

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Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Basar

Ahmad

Cho

et al. 2014

Sensors

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Wireless capsule endoscopy (WCE) is a promising technology for direct diagnosis of the entire small bowel to detect lethal diseases, including cancer and obscure gastrointestinal bleeding (OGIB). To improve the quality of diagnosis, some vital specifications of WCE such as image resolution, frame rate and working time need to be improved. Additionally, future multi-functioning robotic capsule endoscopy (RCE) units may utilize advanced features such as active system control over capsule motion, drug delivery systems, semi-surgical tools and biopsy. However, the inclusion of the above advanced features demands additional power that make conventional power source methods impractical. In this regards, wireless power transmission (WPT) system has received attention among researchers to overcome this problem. Systematic reviews on techniques of using WPT for WCE are limited, especially when involving the recent technological advancements. This paper aims to fill that gap by providing a systematic review with emphasis on the aspects related to the amount of transmitted power, the power transmission efficiency, the system stability and patient safety. It is noted that, thus far the development of WPT system for this WCE application is still in initial stage and there is room for improvements, especially involving system efficiency, stability, and the patient safety aspects.

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Section: Wpt System For Wcementioning

confidence: 99%

“…The commonly used ferrite cores are 3F4 of Ferroxcube (μi = 1000) [71], R5K (μi = 5000) [62] or R10K (μi = 10,000) [12] of DMEGC Magnetic Co., Ltd., Zhejiang, China.…”

Section: Wpt System For Wcementioning

confidence: 99%

Section: Overview Of Existing Wpt Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Basar

Ahmad

Cho

et al. 2014

Sensors

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“…All these characteristics greatly increase the design difficulty of the WPT system of CE, particularly for the RX unit. In the past decade, many WPT systems for CE have been developed and the received power could be up to several hundreds of milliwatt [8][9][10][11][12]. However, the design parameters of these systems were always determined by experiments, which are time-consuming and easily disturbed by environment.…”

Section: Introductionmentioning

confidence: 99%

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

Shao

Líu

Fang

2016

Sci. China Technol. Sci.

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In the wireless power transfer system for freely moving biomedical implants, the receiving unit was generally inefficient for the reason that its design parameters including the receiving coil's dimension and receiving circuits' topology were always determined by experiments. In order to build the relationship between these parameters and the total transfer efficiency, this paper developed a novel efficiency model based on the impedance model of the coil and the circuit model of the receiving circuits. According to the design constraints, the optimal design parameters in the worst case were derived. The results indicate that the combination of the two-layered receiving coil and half-bridge rectifier has more advantages in size, efficiency and safety, which is preferred in the receiving unit. Additionally, when the load resistance increases, the optimal turn number of the receiving coil basically keeps constant and the corresponding transmitting current and total efficiency decrease. For 100 Ω load, the transmitting current and total efficiency in the worst case were measured to be 5.30 A and 1.45% respectively, which are much better than the published results. In general, our work provides an efficient method to determine the design parameters of the wireless power transfer system for freely moving biomedical implants.wireless power transfer system, capsule endoscope, freely moving biomedical implants, receiving coil, coil optimization, efficiency Citation: Shao Q, Liu H, Fang X L. Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants.

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Robotics in the Gut

Min

Yang

et al. 2019

Advanced Therapeutics

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Since the advent of ingestible temperature sensors and capsule endoscopes, rapid advances in electronics, robotics, nanotechnology, and material sciences have opened the door for the development of novel medical ingestible robots. The untethered robots provide direct, non-invasive access to the entire gastrointestinal (GI) tract. Furthermore, the tissues, gases, and fluids of the gastrointestinal lumen contain a multitude of biomarkers indicative of gut diseases and health. Ingestible medical robots equipped with advanced imaging and sensing techniques can enable the diagnosis and monitoring of diseases, while providing a better pathophysiological understanding of gastrointestinal disorders. In addition, various robotic actuation mechanisms in the macro-and microscale can realize enhanced drug delivery and surgical interventions for the treatment of diseases. In this paper, an overview of recent advances in ingestible robots toward imaging, sensing, drug delivery, and surgical applications in the GI tract is provided. Key challenges and strategies for the development of novel ingestible robots and future directions of ingestible robots toward precision medicine are also discussed.

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Efficiency optimization of wireless power transmission systems for active capsule endoscopes

Cited by 40 publications

References 22 publications

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview

Efficiency analysis and optimization of wireless power transfer system for freely moving biomedical implants

Robotics in the Gut

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