Evaluation of the Large-Length Indoor Standard Installation Based on Single Point Scanning

Round 1

Reviewer 1 Report

I have some comments and questions regarding this article:

1. Some more international references would be good.
2. The quality of the numbering in Fig. 1b could be improved.

Author Response

Dear Reviewer:

Thank you for your comments concerning our manuscript entitled “Evaluation of the Large-Length Indoor Standard Installation Based on Single Point Scanning” (ID: 1394493). Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. Revised portion are marked in red in the paper.

Point 1: Some more international references would be good.

Response 1: Thanks for your advice. We have added five references in the resubmitted manuscript. They are respectively reference [3], [4], [15], [16], and [17]. In this resubmitted manuscript, reference [3] and [4] have been added in Line 39-40. And reference [15], [16] have been added in Line 62-67. Reference [17] has been added in Line 84.

Point 2: The quality of the numbering in Fig. 1b could be improved.

Response 2: Sorry for our carelessness. We have carefully revised the Fig.1b in the resubmitted manuscript.

Finally, we appreciate again for your valuable comments and look forward to further contact with you.

Author Response File: Author Response.docx

Reviewer 2 Report

The paper is interesting because it concerns the evolution of LLISI system. However, the paper should be improved.

 

1. Introduction

 

In the introduction, the Authors wrote some information about measuring devices used in industrial applications. It should be noted that there is another interesting method that can be used to measure roundness and waviness deviations of large cylindrical parts in the industry.

Please refer to the following literature:

Adamczak, S.; Zmarzły, P.; Stępień, K. Identification and analysis of optimal method parameters of the V-block waviness measurements. Bull. Polish Acad. Sci. Tech. Sci. 2016, doi:10.1515/bpasts-2016-0037.

 

2. The quality of figures 1, 3, and 4 is weak. Please improve its.

 

3. Section 2. Measurement platform

 

Please add more information about examined LLISI platform. What type of software has been used in this system? Please describe the PWM speed control system.

 

4. Section 3. Methods

 

Please add more information about the object (samples) that has been used in research.

 

5. Conclusions

 

The conclusion is too general. Most of the text in the conclusion is the summary of the article. The conclusions should precisely define the significance of the obtained results. The authors should be described the main advantages and disadvantages of the proposed method. Please add some information about future research.

 

 

Author Response

Dear Reviewer:

Thank you for your comments concerning our manuscript entitled “Evaluation of the Large-Length Indoor Standard Installation Based on Single Point Scanning” (ID: 1394493). Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our researches. We have studied comments carefully and have made correction which we hope meet with approval. Revised portion are marked in red in the paper.

Point 1: Introduction

In the introduction, the Authors wrote some information about measuring devices used in industrial applications. It should be noted that there is another interesting method that can be used to measure roundness and waviness deviations of large cylindrical parts in the industry.

Please refer to the following literature:

Adamczak, S.; Zmarzły, P.; Stępień, K. Identification and analysis of optimal method parameters of the V-block waviness measurements. Bull. Polish Acad. Sci. Tech. Sci. 2016, doi:10.1515/bpasts-2016-0037.

Response 1: Thanks for your advices. We have cited this recommended paper in the introduction part of resubmitted manuscript. The recommended paper as a reference [15] has been added in Line 62-64. ‘Adamczak, S. et al. proposed a novel method for measuring the waviness of cylindrical surfaces, which proved that the measurement accuracy of the V-block method used to measure waviness deviation of cylindrical parts depends on the measurement parameter [15].’

Otherwise, we have added another four references in the resubmitted manuscript. They are respectively reference [3], [4], [16], and [17]. In this resubmitted manuscript, reference [3] and [4] have been added in Line 39-40. And reference [16] has been added in Line 65-67. Reference [17] has been added in Line 84.

Point 2: The quality of figures 1, 3, and 4 is weak. Please improve its.

Response 2: Sorry for our carelessness. We have carefully revised the Fig.1, Fig.3 and Fig.4 in the resubmitted manuscript.

Point 3: Section 2. Measurement platform

Please add more information about examined LLISI platform. What type of software has been used in this system? Please describe the PWM speed control system.

Response 3: Following your suggestions, we have redescribed the examined LLISI platform in detail in the second paragraph of Section 2 on page 2 of resubmitted manuscript. Meanwhile, we have also explained the type of software and the working principle of PWM.

The control system of LLISI includes the software control system and the electrical control system. In the software control system, the 60-meter LLISI software based on the Labview environment can indirectly implement the function of electrical control system, and can set the parameters such as the velocity of measurement system, time and so on. There are some function modules for controlling system and monitoring the status of system in the software, including experimental environment monitoring, operation status monitoring of stress system, electric control system trigger and data acquisition. The electrical control system is composed of power supply control system, control handle, bed electrical module (such as drive motor, sensor, limit switch, etc.). Pulse width modulation (PWM) method is utilized to control the DC motor drive of X-axis for modulating the movement mode of Sanyo motor. In order to accurately control the measuring platform, the PWM method can not only reduce 2-axis inertia but also enhance the response rate of motor. In addition, controlling the initial value of timer of microprocessor can transform the input analog control signal to the digitally coded signal to implement the PWM method. It can instantly generate pulse waveforms with different duty ratios, thereby achieving the adjustment of the average speed of the platform. The average speed of the continuously adjustable measuring platform ranged from 0 to 200 mm/s, which can be calculated by the following equation: In order to accurately control the measuring platform, the PWM speed control system was used to adjust the speed of the electric platform of LLISI. The initial value of the internal timer of the single-chip computer was adjusted to generate pulse waveforms with different duty ratios, thereby achieving the adjustment of the average speed of the platform. The average speed of the continuously adjustable measuring platform ranged from 0 to 200 mm/s, which can be calculated by the following equation:

Point 4: Section 3. Methods

Please add more information about the object (samples) that has been used in research.

Response 4: We are very grateful for your advices. For the selection of measurement interval, we have referred to some literatures about the large-scale measurement in this resubmitted manuscript. Since the working life and accuracy are influenced by the motion speed of the LLISI, the measurement speed was selected according to the practical motion state. In the follow-up work, we will carry out some test experiments of the measurement speed for obtaining more satisfying motion speed of the LLISI. Thanks for your suggestions again.

Point 5: Conclusions

The conclusion is too general. Most of the text in the conclusion is the summary of the article. The conclusions should precisely define the significance of the obtained results. The authors should be described the main advantages and disadvantages of the proposed method. Please add some information about future research.

Response 5: We are glad to receive your advices. We have re-summarized the conclusion in detail in the Section 6 on page 10 of resubmitted manuscript. Following your advices, we have described the main advantages and disadvantages of the proposed method. Meanwhile, our future research interest has also been indicated in this part. We are very grateful for your advices.

‘In this study, the laser tracker method based on single point scanning was used proposed to evaluate the accuracy of the LLISI. The laser tracker, as a method of measuring the LLISI, can achieve the high measuring accuracy, high repeatability and large space measurement. Otherwise, the proposed method is able to dynamically collect 3D point cloud data The laser tracker is able to collect 3D point cloud data in real time and has been used to provide a higher measurement accuracy.

Under the standard experimental environment, the measurements were carried out at measurement intervals of 0.1 m, 0.3 m, 0.5 m, 1.0 m and 5.0 m and at 50 mm/s, 100 mm/s and 150 mm/s, respectively. The measurement results of the laser tracker were compared with that of the laser interferometer through single and multiple measurements under the case of indoor large-scale measurement. And the maximum time and average time in the movement period under different measurement intervals and nominal speeds were quantified. Hence, it is distinctly shown that the proposed method has the advantage of high insensitivity to noise. In addition, the evaluation method of measurement uncertainty was employed to evaluate the results of local velocity of the LLISI measured by the proposed method. When the value of a confidence factor is k = 2, the uncertainty of the local measurement speed of the laser tracker was approximatively 0.23mm/s evaluated in accordance with the measurement uncertainty standards. The results showed that the laser tracker has the features of minor errors, low data dispersion, and superior repeatability.

In summary, the proposed method has a high accuracy greater potential capacity in the single measurement and can be used utilized to provide support for data resource protection and health management of the LLISI. However, the large capacity of sampling data has introduced the challenge of processing data to influence the real-time result of evaluating the LLISI. For ensuring to rapidly and accurately estimate the operating state of the LLISI, the intelligent optimization algorithms will be significantly taken into account to process and analyze the measurement data in the follow-up research work.’

 

Finally, we appreciate again for your valuable comments and look forward to further contact with you.

Author Response File: Author Response.docx