Calibration of Smartphones for the use in indoor navigation

Keller, Friedrich; Willemsen, Thomas; Sternberg, Harald

doi:10.1109/ipin.2012.6418942

Cited by 14 publications

(11 citation statements)

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“…However, they conducted very simple experiments and only worked on relative height, which is less challenging because the error of relative height mainly depends on the quality of barometers. Recent research works [10,8] have attempted to utilize the embedded barometer sensors in smartphones for measuring height. Li et al [10] used airport control towers as reference points, and reported the accuracy is reliable only nearby airport, while our method provided reliable result in broader area.…”

Section: Related Workmentioning

confidence: 99%

“…This work [16] developed an algorithm to detect floor transition using barometric pressure sensor and accelerometer. Keller et al [8] did good experiments which revealed that the barometers of smartphones are unstable and less accurate compared to high-performing barometers. It is also reported in [8] that it is necessary to calibrate barometer sensor with respect to temperature, which we have not considered in our method yet.…”

Section: Related Workmentioning

confidence: 99%

“…The third problem we tackle is related to the accuracy of the barometer sensors embedded in smarphones. Earlier research work [8] showed that these sensors are less accurate and less stable than the barometers certified for professional use. We use multiple filtering techniques such as Kalman filter to handle this issue.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Beyond horizontal location context

Liu

Iwai

Tobe

et al. 2014

Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct Publication

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Accurate estimation of elevation is important for many location based services. Although, it is possible to obtain altitude from GPS, its accuracy is unreliable and applicable in outdoors only. It is possible to use barometers on smartphones to estimate elevation in both indoor and outdoor scenarios. To this end, we proposed an integrated framework to provide ubiquitous and accurate elevation measurement using smartphones. Experiments conducted in both indoor and outdoor with different geographical characteristics reveal that our system can provide elevation with an error less than 5 meters in 90 % of the cases and less than 3 meters in 75 % of the cases, which is sufficient for most practical applications.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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Beyond horizontal location context

Liu

Iwai

Tobe

et al. 2014

Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct Publication

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“…The accelerometer applies to levelling the sensors [13]. Thus, only an orientation around the vertical axis must be considered.…”

Section: B Orientation With Memsmentioning

confidence: 99%

Museum of the moment: A cooperation project between metropolitan culture and geomatics

Willemsen

Keller

Lorey

et al. 2014

2014 International Conference on Indoor Positioning and Indoor Navigation (IPIN)

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In the art scene, low-cost sensors like Arduino are often being used to create or support a range of different effects. Live-Art installations must be often made very favorably due to low budget. In this article the function of a module for orientation is being described as it works in an artistic project, a Ph.D. -thesis is based on. The project is based on different people's memories and stories. "Museum of the moment" deals with the aesthetic effects of performative collections such as the various visual animations of people's memories. Different people are being videotaped while describing important moments in their lives. These portraits are being presented on large screens in the gallery. The viewers equipped with radio-controlled headphones look at the images and also listen to the different stories, not necessarily knowing who of the portrayed people has told which story. The orientation module based on the Arduino is supposed to identify the screen automatically and communicate with the acoustic server, in order to create the effect, that only the screen, that is being looked at by the viewer will trigger an acoustic signal which is the story that the viewer can listen to. Arduino is being used in this setting to enable orientation in the gallery space in the first place. Secondly, it makes sure to identify positions. Arduino-Nanos with a MPU 9150 are being used. These include an accelerometer, gyroscope and magnetic field sensor. To set and identify positions Wi-Fi is being used. Therefore signal strength and fingerprinting algorithms were examined. The final configuration of the screens does not necessarily need an estimation of position.

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“…This experiment showed that it is possible to detect floor levels using only the barometer with a noise of ± 1 m. A more detailed investigation of the barometer could study the influence of temperature by warming the device. Investigations of the other sensors were presented in [37], [16].…”

Section: Fusion Of Smartphone Sensor Data For Position Estimationmentioning

confidence: 99%

Precise indoor mapping as a basis for coarse indoor navigation

Sternberg

Keller

Willemsen

2013

Journal of Applied Geodesy

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There are a number of consumer electronics applications on the market that use the Global Navigation Satellite System (GNSS). Smartphones equipped with GNSS are used for navigation. In surveying, GNSS-based mobile mapping systems (MMS) are used daily to capture the local environment in three dimensions. In recent years, research into indoor applications has increased, particularly the mapping of building interiors using kinematic measurement methods and navigation indoors. A significant problem is the loss of GNSS-based positioning information. This problem could be eliminated using an Inertial Measurement Unit and/or a combination of additional information. HafenCity University (HCU) is engaged in the development of a modular mobile mapping platform, known as a mobile mapping system (MMS), that can also be used indoors. Furthermore, HCU is working on algorithms for indoor navigation that use commercially available smartphones, thus obviating costly infrastructure. Base maps are important for visual reference and can be used to provide supporting information in navigation algorithms, but constructing base maps is often problematic. The MMS is used for creating maps for indoor navigation. In this paper, a concept of the interaction of the two research areas is presented, and insight on the states of both research areas is given.

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Calibration of Smartphones for the use in indoor navigation

Cited by 14 publications

References 1 publication

Beyond horizontal location context

Beyond horizontal location context

Museum of the moment: A cooperation project between metropolitan culture and geomatics

Precise indoor mapping as a basis for coarse indoor navigation

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