Coded ultrasonic remote control without batteries

Gerhardy, C.; Burlage, Katharina; Schomburg, Werner Karl

doi:10.1088/0960-1317/19/7/074002

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…Micro whistles have been developed for generating ultrasonic signals in remote controls without batteries and electronics [1]. The whistles consist of a resonance room and a bellow producing an air flow through the whistle when pressed with a finger (cf.…”

Section: Micro Whistlesmentioning

confidence: 99%

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Position detection with micro whistles

Ibarguen

Lewandowski

Gerhardy

et al. 2013

2013 Transducers &Amp; Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems

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This paper describes the design and detection of mechanically actuated micro whistles not equipped with any electronics. When actuated, the micro whistle generates an ultrasonic tone above the audible range. A set of 3 or more microphones in the near record this tone and the position of the whistle is calculated from the time differences of the arrivals of the acoustic signals at the different microphones. Theoretically it is possible to get an accuracy of one wave length (1.7 cm).The micro whistles are fabricated by ultrasonic hot embossing of thermoplastic foils at low-cost and their overall size is approximately 1 cm. In experiments the positions of whistles up to now were measured in a 2 m × 2 m area with an accuracy of less than 10 cm.

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Section: Micro Whistlesmentioning

confidence: 99%

“…The whistles were produced from thermoplastic plates by ultrasonic hot embossing and welding [1]. The inverse of resonance room, narrowing, and inlet area were milled as protruding micro structures into an aluminum plate, 40 mm, 60 mm, and 4 mm in width, length, and thickness, serving as a tool (cf.…”

Section: Fabricationmentioning

confidence: 99%

Position detection with micro whistles

Ibarguen

Lewandowski

Gerhardy

et al. 2013

2013 Transducers &Amp; Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems

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“…The final ultrasonic whistle will be tiny and, thus, can be fitted in various places within the living environment such as furniture, textiles, or portable equipment on the body. Realizing an interconnectivity of infrastructure, major functions are home automation (eg, automated doors), safety prevention (eg, emergency services), and positioning (eg, fall detection) [9,10]. The handling is kept simple and also easy to use for people with disabilities, for example, by pressing a button.…”

Section: Introductionmentioning

confidence: 99%

“…In its specific function, the ultrasound is generated mechanically (eg, via button press), without using electricity or batteries. Hence, when using ultrasonic whistles, energy is produced in an environmentally friendly way, which represents a key feature [10], especially compared with equivalent assistance systems such as more complex and into-the-floor integrated sensor systems. However, there is only little knowledge about the user-centered perception and acceptance of ultrasonic whistles with regard to their technical possibilities in home care.…”

Section: Introductionmentioning

confidence: 99%

Ambient Assisted Living as Support for Aging in Place: Quantitative Users’ Acceptance Study on Ultrasonic Whistles

et al. 2018

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Background Given the fact of an aging society, new supply measures and living concepts are needed, especially as health impairments along with care dependency increase with age. As many elderly people wish to stay at home for as long as possible, ambient assisted living (AAL) represents a support for aging in place. Objective AAL combines medical and care technology within living environments and is, therefore, a promising approach to cope with demographic change in terms of fast-growing care needs and fewer skilled workers. Ultrasonic whistles represent one innovative technical possibility for such supportive housing solutions. Central fields of application are home automation, emergency service, and positioning. As AAL technologies affect sensitive areas of life, it is of great interest under which conditions they are accepted or rejected, taking individual user requirements into account. Hence, the aim of this study was to investigate users’ perception and evaluation of ultrasonic whistles. Methods In this study, we examined the acceptance of ultrasonic whistles in home care by function and room using a Web-based questionnaire. Besides an evaluation of the overall usefulness, we focused on the intention to use ultrasonic whistles; 270 participants assessed home automation, emergency service, and positioning as specific functions of ultrasonic whistles. Furthermore, bathroom, bedroom, and living room were evaluated as specific usage locations (rooms). With regard to the user’s perspective, the focus was set on age and attitudes toward aging of care receivers. Results This study revealed a significant influence of function ( F 2,269 =60.444; P <.001), room ( F 2,269 =41.388; P <.001), and the interaction of function and room ( F 4,269 =8.701; P <.001) on the acceptance of ultrasonic whistles. The use of emergency services within the bathroom represented the most accepted alternative, whereas positioning within the living room received the comparably lowest evaluations. Although user diversity played a minor role for acceptance overall, the assessment of single applications differed among user groups, particularly with regard to age differences ( F 20,500 =1.988; P <.01) in the evaluation of specific installation options such as automated doors. Conclusions The study revealed profound insights into the user-centered assessment of ultrasonic whistles in home care and discovered function and room as influencing acceptance parameters. Concerning user characteristics, age, and attitude toward aging partly affected these evaluations, forming the basis for and showing the importance of further investigations in this c...

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“…However, both principles are comparatively complex to realize and, as a consequence, such sensors are expensive. Therefore, it is interesting to investigate whether a low cost organ pipe micro whistle [3] could be employed as a flow properties independent flow sensor.…”

Section: Introductionmentioning

confidence: 99%

Micro Flow Sensor Based on Frequency Measurement of Micro Whistles

Mao

2012

AMR

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In this work, several millimeter sized micro whistles have been tested as potential frequency analog gas flow sensors. The characteristic curves of the whistles were systematically investigated as a function of geometrical dimensions, the kind of gas applied, and temperature. Both a micro¬phone and a PVDF foil were employed to record the frequencies. The relation be¬tween oscillation frequency and volume flow rate only shows a weak function of fluid properties and temperature. At a given flow rate, the difference of argon and nitrogen is 120 Hz on average, which is corresponding to 1.4 %. For air flow at a given flow rate, frequency rises approximately 380 Hz (2.73 %) per 10 °C. This kind of micro whistle could be employed as gas flow sensor which is insensitive to fluid properties.

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Coded ultrasonic remote control without batteries

Cited by 6 publications

References 3 publications

Position detection with micro whistles

Position detection with micro whistles

Ambient Assisted Living as Support for Aging in Place: Quantitative Users’ Acceptance Study on Ultrasonic Whistles

Micro Flow Sensor Based on Frequency Measurement of Micro Whistles

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