A Novel Opto-Fluidic Interface

Hockaday, Bruce D.; Glomb, Walter L.; Taylor, Kenneth D.; Waters, James P.

doi:10.23919/acc.1984.4788524

Cited by 13 publications

(4 citation statements)

References 1 publication

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“…The use of optical control systems over their electrical counterparts offers a number of advantages such as immunity to electromagnetic interference, potential intrinsic safety in flammable areas, weight and cost savings due to the use of optical fibre cable and low attenuation. A number of examples of optical control exist [1][2][3][4][5][6][7], however many of the fluidic devices are restricted in their operation either by the Reynolds number range of the working fluid or by other aspects of the required operational temperature range.…”

Section: Introductionmentioning

confidence: 99%

Manufacture of an optical effector using silicon micro-machining

Berrill

McKenzie

Clark

2000

J. Micromech. Microeng.

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Using a complex micro-machined structure a novel optical-to-fluid pressure converter has been developed. The device offers immunity from electromagnetic interference and the potential for intrinsic safety. The effector, an improved version of a previous device, has been further miniaturized and fully micro-machined from silicon and glass. The device operates when light enters a sealed air-filled cell, formed within a silicon wafer, and is converted to heat by an absorber. The associated rise in temperature increases the pressure inside the cell and forces a diaphragm to move. The diaphragm movement is detected by a change in the back pressure of an impinging jet of fluid; which can be either pneumatic or hydraulic. The response time of the device, of the order of tens of milliseconds, has been further reduced as a result of miniaturization. This paper outlines the manufacturing technique and presents selected experimental test results.

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Section: Introductionmentioning

confidence: 99%

Manufacture of an optical effector using silicon micro-machining

Berrill

McKenzie

Clark

2000

J. Micromech. Microeng.

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“…There are two conversion methods, one is the combination of a laminar proportional amplifier (LPA, Fig. 1) and a photo-acoustic cell as the control port of the LPA [1,2], the other is the temperature control of the power jet's boundary layer in which light is focused onto the base plate of the LPA [3,4,5] and light through optical fi ber illuminates the light absorbing side walls of the LPA supply nozzle [6,7,8].…”

mentioning

confidence: 99%

“…The opto-fluidic control system using photo-acoustic cell was used to control thrust vector of the jet propulsion for missile [3]. The opto-fluidic control system using light absorbing side walls of the LPA supply nozzle illuminated by the light through the optical fibers could drive pneumatic rotary actuators rotating the joints of robot arm by using a booster amplifier as a power amplifier [7,8,9].…”

mentioning

confidence: 99%

Characteristic of Opto-fluidic Control System

Yoshimitsu

Oyama

Yamamoto

1999

Proceedings of the JFPS International Symposium on Fluid Power

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An opto-fluidic control system employing a laminar proportional amplifier was used to convert directly optical signal into fluidic signal by the thermal control of the supply jet's velocity distribution. It can work in hazardous environment because it doesn't use electric signals. A differential optical signal was introduced through opposing optical fibers into the light absorbing end sections of them constructing the opposing side-walls of the supply nozzle of the interface. The differential fl uidic output signal of the opto-fluidic interface was amplified by a three-stage laminar proportional amplifier gain block and turbulent proportional amplifiers.In this study, opto-fluidic conversion characteristics were clarified by numerical analysis and by the experiments using a experimental model having the size of four times that of the practical opto-fluidic interface. The appropriateness of the analytical model was proved by the experiment using the large-scale experimental model.

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“…focused onto the base plate of the LPA [3][4][5] and light through optical fiber illuminates the light absorbing side wall of the LPA supply nozzle [6,7]. This paper describes the evaluation of a new differential type opto-fluidic interface in which light signals though optical fiber illuminate the opposed light absorbing side walls of the supply nozzle of the LPA and the feasibility of the opto-pneumatic control robot arm which consists of the opto-fluidic interface, a LPA gain block, a proportional gain module, a booster amplifier and the arm with pneumatic rotary actuators.…”

mentioning

confidence: 99%

Opto-Fluidic Robot Control System

Yamamoto

Oyama

1996

Proceedings of the JFPS International Symposium on Fluid Power

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Intending to explore the possibility of an optical control robot without interposing any electrical signal, a pneumatic control robot arm controlled with a new differential optofl uidic interface was developed. The interface employs opposed light absorbing nozzle walls in a laminar proportional fluid amplifier. The fluidic output signal of the interface was amplified by a three-stage proportional amplifier gain block. Robot arm has two members and two joints moved by pneumatic rotary actuators. Two membrane type booster amplifiers with two staged nozzle-flapper valves were used to amplify the power of the output signals of the gain block so far as enough to drive the rotary actuator. PID control was applied to the robot arm system and the feasibility of the optical control was proved.

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A Novel Opto-Fluidic Interface

Cited by 13 publications

References 1 publication

Manufacture of an optical effector using silicon micro-machining

Manufacture of an optical effector using silicon micro-machining

Characteristic of Opto-fluidic Control System

Opto-Fluidic Robot Control System

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