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. 2011;11(5):5071-86.
doi: 10.3390/s110505071. Epub 2011 May 6.

Measuring oscillating walking paths with a LIDAR

Mercè Teixidó  1 , Tomàs Pallejà, Marcel Tresanchez, Miquel Nogués, Jordi Palacín
Affiliations

Measuring oscillating walking paths with a LIDAR

Mercè Teixidó et al. Sensors (Basel). 2011.

Abstract

This work describes the analysis of different walking paths registered using a Light Detection And Ranging (LIDAR) laser range sensor in order to measure oscillating trajectories during unsupervised walking. The estimate of the gait and trajectory parameters were obtained with a terrestrial LIDAR placed 100 mm above the ground with the scanning plane parallel to the floor to measure the trajectory of the legs without attaching any markers or modifying the floor. Three different large walking experiments were performed to test the proposed measurement system with straight and oscillating trajectories. The main advantages of the proposed system are the possibility to measure several steps and obtain average gait parameters and the minimum infrastructure required. This measurement system enables the development of new ambulatory applications based on the analysis of the gait and the trajectory during a walk.

Keywords: LIDAR; alcohol intake; gait measurement; gait trajectory; laser range sensor; oscillatory path.

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Figures

Figure 1.
Figure 1.
Hokuyo UTM-30LX.
Figure 2.
Figure 2.
Representation of a typical measurement set with a representation of the scan plane.
Figure 3.
Figure 3.
Example of LIDAR raw data points showing two legs.
Figure 4.
Figure 4.
Alcotest 7110 Evidential.
Figure 5.
Figure 5.
Gait parameters.
Figure 6.
Figure 6.
Graphic definition of the A and AA parameters.
Figure 7.
Figure 7.
Graphic example of the procedure used to estimate the straight path.
Figure 8.
Figure 8.
Example of trajectories registered: Half period case.
Figure 9.
Figure 9.
Example of trajectories registered: One period case.
Figure 10.
Figure 10.
Individual values of the AA parameter: Half period case.
Figure 11.
Figure 11.
Individual values of the AA parameter: One period case.
Figure 12.
Figure 12.
Details of two walking trajectories for different breath alcohol concentration: Woman case.
See this image and copyright information in PMC

References

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MeSH terms

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