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Correction: Becker, C.N.; Koerner, L.J. Plastic Classification Using Optical Parameter Features Measured with the TMF8801 Direct Time-of-Flight Depth Sensor. Sensors 2023, 23, 3324
 
 
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Volume 23
Issue 18
10.3390/s23187987
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Article
Peer-Review Record

Inertial Measurement Unit Sensor-to-Segment Calibration Comparison for Sport-Specific Motion Analysis

Sensors 2023, 23(18), 7987; https://doi.org/10.3390/s23187987
by Mitchell Ekdahl 1,*, Alex Loewen 1, Ashley Erdman 1, Sarp Sahin 1 and Sophia Ulman 1,2
Reviewer 1:
Minh Long Hoang
Reviewer 2:
Christian Greve
Sensors 2023, 23(18), 7987; https://doi.org/10.3390/s23187987
Submission received: 27 July 2023 / Revised: 13 September 2023 / Accepted: 18 September 2023 / Published: 20 September 2023
(This article belongs to the Section Wearables)

Round 1

Reviewer 1 Report

 

MDPI Sensors Reviewer Comments:

This study aims to evaluate sensor-to-segment calibration methods to measure joint angle range of motion. There are the following concerns, which author need to clarify and improve:

1.      The introduction and state of art must be improved. Authors need to mention more related research and more references.

2.      The data processing part is important part. Principal component analysis (PCA) was performed on the IMU data. However, authors did not describe in detail the working principle of PCA on IMU data and why PCA was selected in this case.  Authors must expand and dive deeper into this part.

3.      The relationship between human body frame and IMU sensor frame should be demonstrated more clearly in a specific picture.

4.      The calibration technique should be depicted and shown in diagram or flow chart to be clearer.

5.      The optical capture was used as gold standard comparison, so it is necessary to describe its working principle also.

6.      Why the IMU technique can replace the optical technique?

7.      Authors must describe how the angles were calculated from IMU data.

8.      The results are shown only on the statistics. The charts need to be utilized for better visualization.

 

 

  Authors must double-check the English grammar and format of the manuscript carefully.

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report


Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Authors improved the article. 

I have one last question for the author: the gyroscope includes noise and drift, which negatively impact the angle integration. How did author solve this issue?

Author should check the text, grammar and whole structure carefully before publishing the article. 

Authors improved the article. 

I have one last question for the author: the gyroscope includes noise and drift, which negatively impact the angle integration. How did author solve this issue?

Author should check the text, grammar and whole structure carefully before publishing the article. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

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