Fundamental Study of Mover Travel Inside a Small Diameter Pipe.

Saito, Hidejiro; Sato, Keijin; Kudo, Kotaku; Sato, Kazuhiro

doi:10.1299/kikaic.66.346

Cited by 23 publications

(18 citation statements)

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“…However, the realization for in-piping cableless robots capable of locomotion over long range inside the pipe is required. A many studies have investigated the mechanisms of an actuator having an attached electrical cable to provide locomotion in the pipe using devices such as piezoelectric elements (Saito et al, 2000;Fujita et al, 2004), air cylinders (Ohno et al, 2006), shape memory alloys (Reynaerts et al, 1996;Kwon et al, 2005), and electromagnetic motors (Choi et al, 2007;Miyagawa et al, 2008;Bocko et al, 2009). There are several potential problems in the design, however, with regard to extending the range and avoiding tangling of the electrical cable, and thus it is clearly desirable to adopt a cable-free system.…”

Section: Introductionmentioning

confidence: 99%

Cableless In-piping Magnetic Actuator for Transportation over Long-range

Izumikawa¹,

Watanabe²,

Yaguchi³

2015

MER

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This paper proposes a cableless In-piping magnetic actuator capable of locomotion over long range of 1,000 m within a pipe having an inner diameter of 10 mm. The cableless magnetic actuator is moved by using resonance energy of a mass-spring system excited by using an electromagnetic force. The proposed actuator incorporates a new type of an electrical inverter that directly transforms DC from button batteries into AC. The electrical DC-AC inverter incorporates a mass-spring system, two reed switches and two curved permanent magnets that switch under an electromagnetic force. The conventional DC-AC inverter and the newly proposed inverter were compared, and the effect of the inverter on the motive properties of the cableless magnetic actuator was examined. The influence of the consumption current of the battery on the range of the actuator was examined. Experimental result demonstrates that the cableless magnetic actuator was able to move horizontally at 1,588 m, and horizontal speed at 176.5 mm/s when two reed switches were used.

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Section: Introductionmentioning

confidence: 99%

Cableless In-piping Magnetic Actuator for Transportation over Long-range

Izumikawa¹,

Watanabe²,

Yaguchi³

2015

MER

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“…A robot capable of visual inspection inside complex pipes is required. A number of studies have investigated the mechanisms for control of robots by means of an electrical cable to provide locomotion in a pipe, using devices such as piezoelectric elements [1][2][3], shape memory alloys [4,5], and electromagnetic motors [6][7][8][9][10][11]. Several kinds of inspection robot have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrical Cable on Movement-Range of Agnetic Actuator System Capable of Inspection in a Pipe

Sasaki¹,

Sato²,

Yaguchi

2014

J MECH ENG SCI

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This paper proposes a magnetic actuator system of a new type capable of inspection in a complex pipe by means of a new motion principle. Using plural vibration components, the magnetic actuator is able to move in the complex pipe. A magnetic actuator of the reversible type, due to opening and closing of a compound material by using elongation and contraction of four shape-memory-alloy (SMA) coils, was fabricated. In this paper, the influence of the electrical cable length on the moving characteristics of the magnetic actuator is discussed. Twenty electrical cables of 0.12 mm diameter were used in this paper. The experimental result shows that the prototype actuator was able to climb at 15.3 mm/s in the straight pipe when pulling a load mass of 50 g. In addition, the result demonstrated that the magnetic actuator system was able to inspect the complex pipe over a distance of 10 m. This actuator system can inspect a complex pipe with an inside diameter from 40 mm to 50 mm. In addition, the actuator system was able to inspect the pipe with a simple apparatus of three amplifiers and one signal generator.

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“…A number of studies [1][2][3][4][5][6] have addressed mechanisms of an actuator with an electric cable to provide locomotion in the pipe by means of various devices. The design of the cable type robot is quite simple compared to the design of the cableless robot.…”

Section: Introductionmentioning

confidence: 99%

“…The electrical DC-AC inverter is composed of a reed switch and a curved permanent magnet that switches under an electromagnetic force. The propulsion of this cableless magnetic actuator exhibits good performance compared with other types of actuators that are powered by an electric cable [1][2][3][4][5][6]. It was shown that this actuator is one of important magnetic application.…”

Section: Introductionmentioning

confidence: 99%

Considerations on Improvement of Moving Properties for Magnetic Actuator Capable of Movement in Pipe

Izumikawa¹,

Yaguchi²

2011

Journal of Magnetics

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The present paper proposes a novel cableless magnetic actuator with a new propulsion module that exhibits a very high thrusting force. This actuator contains an electrical inverter that directly transforms DC from button batteries into AC. The electrical DC-AC inverter incorporates a mass-spring system, a reed switch, and a curved permanent magnet that switches under an electromagnetic force. The actuator is moved by the inertial force of the mass-spring system due to mechanical resonance energy. The experimental results show that the actuator is able to move upward at a speed of 33 mm/s when using 10 button batteries when pulling a 10 g load mass. This cableless magnetic actuator has several possible applications, including narrow-pipe inspection and maintenance.

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Fundamental Study of Mover Travel Inside a Small Diameter Pipe.

Cited by 23 publications

References 0 publications

Cableless In-piping Magnetic Actuator for Transportation over Long-range

Cableless In-piping Magnetic Actuator for Transportation over Long-range

Effect of Electrical Cable on Movement-Range of Agnetic Actuator System Capable of Inspection in a Pipe

Considerations on Improvement of Moving Properties for Magnetic Actuator Capable of Movement in Pipe

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