Staircase wobbling assessment method and assessment system

Abstract

To provide a staircase wobbling assessment method and assessment system, which enable easy assessment of staircase wobbling.SOLUTION: A staircase wobbling assessment method is provided, comprising a measurement step (S101) of measuring at least horizontal vibration of a staircase 2 and horizontal displacement of the staircase 2, and an assessment prediction step (S102-S104) of predicting a result of a sensory assessment of wobbling of the staircase 2 using a result of the measurement in the measurement step (S101).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method and system for evaluating staircase sway. [Background technology]

[0002] Conventionally, techniques relating to stairs are known, for example, as described in Patent Document 1.

[0003] Patent Document 1 describes an open staircase that does not have risers connecting the upper and lower treads. Furthermore, the sides of the rafters that support the treads are not fixed to the wall.

[0004] Stairs such as those described above are generally prone to shaking as users ascend and descend. One method for evaluating stair shaking is sensory evaluation by an evaluator. However, performing a sensory evaluation requires extensive work. Therefore, a method for evaluating stair shaking that can easily evaluate stair shaking is needed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-133330 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above circumstances, and the problem to be solved by the present invention is to provide a method and system for evaluating stair sway that can easily evaluate the sway of stairs. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, claim 1 comprises a measurement process for measuring at least the horizontal vibration of the stairs and the horizontal displacement of the stairs, and an evaluation prediction process for predicting the results of a sensory evaluation of the sway of the stairs using the measurement results of the measurement process.

[0009] In claim 2, the measuring step further measures the vertical displacement of the stairs.

[0010] In claim 3, the measurement process measures horizontal vibrations of the stairs using a vibration meter installed on the stairs, and measures horizontal and vertical displacements of the stairs using a displacement meter installed on the stairs.

[0011] In claim 4, the measurement process measures the horizontal vibration of the stairs using a vibration meter installed on the stairs, and measures the horizontal and vertical displacement of the stairs by converting the measured value of the vibration of the stairs using the vibration meter.

[0012] In claim 5, the evaluation prediction process includes a subjective prediction process for predicting the results of a subjective evaluation, which is an evaluation of the subjective shaking felt by the user of the stairs themselves while using the stairs, based on the measurement results of the horizontal vibration of the stairs in the measurement process.

[0013] In claim 6, the evaluation prediction process includes an objective prediction process for predicting the results of an objective evaluation, which is an objective evaluation of the shaking felt by a non-user who is not using the stairs when watching a user of the stairs using the stairs, based on the measurement results of the horizontal and vertical displacements of the stairs in the measurement process.

[0014] In claim 7, the evaluation prediction process includes a subjective prediction process for predicting the result of a subjective evaluation, which is a subjective evaluation of the shaking felt by the user of the stairs themselves while using the stairs, based on the measurement results of the horizontal vibration of the stairs in the measurement process, and an objective prediction process for predicting the result of an objective evaluation, which is an objective evaluation of the shaking felt by a non-user who is not using the stairs when watching the user of the stairs using the stairs, based on the measurement results of the horizontal and vertical displacement of the stairs in the measurement process.

[0015] In claim 8, the evaluation prediction process includes a comprehensive prediction process that predicts the result of the sensory evaluation by predicting an evaluation of the overall sway of the stairs using the prediction result of the subjective prediction process and the prediction result of the objective prediction process.

[0016] In claim 9, the device comprises a measurement unit that measures at least the horizontal vibration of the stairs and the horizontal displacement of the stairs, and an evaluation prediction unit that uses the measurement results of the measurement unit to predict the results of a sensory evaluation of the swaying of the stairs. [Effects of the Invention]

[0017] The present invention has the following effects.

[0018] In the present invention, the sway of stairs can be easily evaluated. [Brief explanation of the drawings]

[0019] [Figure 1] 1A is a block diagram showing an evaluation system for executing a method for evaluating staircase sway according to an embodiment of the present invention, and FIG. 1B is a perspective view showing a staircase that is the subject of the method for evaluating staircase sway. [Figure 2] 1 is a flowchart showing steps of a method for evaluating stair sway. [Figure 3] 10 is a graph showing vibration patterns of a plurality of stairs that are the subject of sensory evaluation and measurement. [Figure 4]FIG. 2 is an explanatory diagram showing the contents of evaluation used in the sensory evaluation. [Figure 5] 10 is a graph showing the relationship between the actual measured value and the predicted value of the overall average score of the sensory evaluation. [Figure 6] (a) Plan view showing the installation positions of vibration meters and horizontal displacement meters on the stairs. (b) Side view showing the installation positions of vertical displacement meters on the stairs. [Figure 7] (a) Table showing the results of the sensory evaluation. (b) Table showing the horizontal vibration level of the stairs. (c) Table showing the horizontal and vertical displacement of the stairs. [Figure 8] (a) A table showing the correlation between the vibration level of the tread and the average subjective evaluation score. (b) A graph showing the relationship between the actual measured value and the predicted average subjective evaluation score of the sensory evaluation. [Figure 9] (a) A table showing the correlation between the horizontal and vertical displacement of the treads and the average objective evaluation score. (b) A graph showing the relationship between the actual measured average objective evaluation score and the predicted average objective evaluation score using a displacement meter. (c) A graph showing the relationship between the actual measured average objective evaluation score and the predicted average objective evaluation score using a vibration meter. DETAILED DESCRIPTION OF THE INVENTION

[0020] An evaluation system 1 and a method for evaluating stair sway according to an embodiment of the present invention will be described below.

[0021] Figure 1 shows a staircase 2 to be evaluated using the method for evaluating staircase sway according to this embodiment. The staircase 2 is installed, for example, inside a house. The staircase 2 is formed by a plurality of step plates 3 at the top and bottom and left and right stringers 4 that support the left and right sides of the step plates 3.

[0022] The staircase 2 according to this embodiment is a skeleton staircase (open staircase) that does not have risers connecting adjacent treads 3. Of the left and right stringers 4 of the staircase 2, only the left stringer 4 is fixed to the wall 5. It is expected that the staircase 2 described above will be more susceptible to shaking when going up and down compared to stairs with risers or stairs that are fixed to the wall on both sides.

[0023] If the staircase 2 sways significantly, users who use (go up and down) the stairs may feel uncomfortable or uneasy when going up and down. Here, the discomfort (uneasiness) caused by the swaying of the stairs 2 may be caused by large horizontal or vertical vibrations of the treads 3 or by horizontal or vertical displacements (deflection, etc.) of the treads 3. In addition to users, observers who are not using the stairs 2 may also feel uncomfortable or uneasy when they see the swaying caused by others going up and down the stairs 2.

[0024] One possible method for evaluating the sway of the staircase 2 described above is to conduct a sensory evaluation by multiple evaluators. However, conducting a sensory evaluation requires extensive work. For this reason, it is difficult to conduct a sensory evaluation every time the staircase 2 is evaluated.

[0025] The method for evaluating stair sway according to this embodiment shown in Figure 2 can predict the results of the sensory evaluation using measurements of the sway of stairs 2 obtained by measuring instruments (a vibration meter 10, a horizontal displacement meter 20, and a vertical displacement meter 30, which will be described later). The evaluation method according to the present invention is carried out by an evaluation system 1 (see Figure 1(a)), which will be described later.

[0026] The values, formulas, etc. used in the evaluation method of the present invention have been determined based on the results of a sensory evaluation conducted in advance by the applicant and instrumental measurements of stair sway. In order to identify the causes of discomfort (anxiety) felt by stair users and observers, the applicant conducted sensory evaluations and instrumental measurements on multiple (six types) of stairs A to F, each with a different sway pattern, and determined the values, formulas, etc. used in the evaluation method based on the measurement results. The sensory evaluations and instrumental measurements will be explained below.

[0027] First, the sensory evaluation will be described. The applicant conducted a sensory evaluation of stairs A to F by multiple evaluators. The sensory evaluation was conducted by approximately 30 to 40 evaluators ranging in age from 20 to 60 years old. The sensory evaluation also evaluated the vibration of stairs A to F when ascending and descending under the same conditions. Skeleton stairs with a shape roughly similar to staircase 2 shown in Figure 1 were used for stairs A to F. The graph in Figure 3 shows the magnitude of horizontal and vertical vibration of stairs A to F. The horizontal axis of the graph indicates the magnitude of horizontal vibration, and the vertical axis indicates the magnitude of vertical vibration. The horizontal and vertical axes of the graph indicate the magnitude of vibration as a rough guide, using "large," "medium," and "small."

[0028] As shown in Figure 3, Staircase A has "small" horizontal vibration and "medium" vertical vibration. Staircase B has slightly larger horizontal vibration than Staircase A and "medium" vertical vibration. Staircase C has "large" horizontal vibration and "medium" vertical vibration. Staircase D has "small" horizontal vibration and "large" vertical vibration. Staircase E has "medium" horizontal vibration and "small" vertical vibration. Staircase F has "small" horizontal vibration and "small" vertical vibration.

[0029] In the sensory evaluation, the applicant asked the evaluators five questions shown in Figure 4. Of the questions in Figure 4, questions 1 to 3 are questions for subjective evaluation (subjective evaluation) of the evaluator's own feelings while ascending and descending each staircase (staircases A to F), and question 4 is a question for objective evaluation (objective evaluation) of the sway of the stairs, asked by an evaluator located in a place other than the stairs while watching other people (other evaluators) ascending and descending each staircase. Question 5 is a question for comprehensive evaluation (comprehensive evaluation) based on the subjective evaluation and objective evaluation. Each question will be explained in detail below.

[0030] Question 1 asks, "How much shaking do you feel when going up and down the stairs?" Question 1 includes a line extending from side to side on the paper, with "not at all" written at the left end of the line and "very much" written at the right end. The evaluator marks any position on the line in Question 1 to indicate the degree of shaking they felt when going up and down the stairs.

[0031] Question 2 asks, "Do you feel anxious or uncomfortable when swaying when going up or down stairs?" Question 2 contains a straight line similar to that of Question 1, with the left end of the line reading "I do not feel anxious or uncomfortable at all" and the right end reading "I feel very anxious or uncomfortable." By marking any position on the line in Question 2, the evaluator indicates their assessment of the anxiety and discomfort they felt from the swaying when going up or down stairs.

[0032] Question 3 asks, "Which feels stronger: vertical or horizontal shaking?" Here, "vertical shaking" refers to shaking in the vertical direction, and "horizontal shaking" refers to shaking in the horizontal direction. Question 3 has three options: "vertical shaking," "horizontal shaking," and "don't know." By marking one of the options, the evaluator indicates their evaluation of the type of shaking they felt when going up and down the stairs.

[0033] Question 4 asks, "Do you feel anxious or uncomfortable when you see other people going up and down the stairs (vibrations and flexions)?" Question 4 contains a line similar to that of Question 1, with the left end of the line reading "I don't feel anxious or uncomfortable at all" and the right end reading "I feel very anxious or uncomfortable." By marking any position on the line in Question 4, the evaluator indicates their assessment of the anxiety and discomfort they felt when watching other people (other evaluators) going up and down the stairs.

[0034] Question 5 asks, "If you imagine the stairs at your home shaking like this, taking into account questions 1 to 4, would you be able to tolerate it?" Question 5 contains a line similar to that of question 1, with "tolerable" written at the left end of the line and "unacceptable" at the right end. The evaluator indicates their overall evaluation of the stairs, taking questions 1 to 4 into consideration, by marking any position on the line in question 5.

[0035] In questions 1, 2, 4, and 5 above, evaluation points are given based on the ratio of the mark position to the length of the line, with the left end of the line being given 0 points and the right end being given 100 points. The higher the score, the more negative the evaluation.

[0036] The applicant analyzed the results of the sensory evaluation and found that there was a high correlation between the evaluation score for Question 5 and the evaluation scores for Questions 2 and 4. Therefore, in the following, attention will be focused on the evaluation scores for Questions 2, 4, and 5. The table shown in Figure 7(a) shows the results of the sensory evaluation for Questions 2, 4, and 5. Note that in the following, the evaluation score for Question 2 will be referred to as the "subjective evaluation score," the evaluation score for Question 4 will be referred to as the "subjective evaluation score," and the evaluation score for Question 5 will be referred to as the "overall evaluation score" (see Figure 4). The applicant calculated the subjective evaluation score, the average of the subjective evaluation score, and the overall evaluation score (the average of the evaluation scores of each evaluator) for each of Steps A to F. In the following, these average scores will be referred to as the "average subjective evaluation score," the "average objective evaluation score," and the "average overall evaluation score," respectively.

[0037] The applicant conducted a multiple regression analysis on the subjective evaluation average score, the objective evaluation average score, and the overall evaluation average score. As a result of the multiple regression analysis, it was concluded that the relationship between the subjective evaluation average score, the objective evaluation average score, and the overall evaluation average score can be roughly expressed by the following mathematical formula 1. (Number 1) Overall average score = d × subjective average score + e × objective average score + f where: d:0.216307 e:0.952061 f:-3.69867

[0038] As described above, the relationship between the subjective evaluation average score, the objective evaluation average score, and the overall evaluation average score can be expressed by the formula in Equation 1. From this, the applicant believed that it would be possible to predict the overall evaluation score using the subjective evaluation score and the objective evaluation score by performing calculations using the formula in Equation 1, and conducted verification. Specifically, the value of the overall evaluation average score calculated using the formula in Equation 1 based on the subjective evaluation average score and the objective evaluation average score (hereinafter referred to as the "predicted value") was compared with the value of the overall evaluation average score actually answered by the evaluator in response to the questions in FIG. 4 (hereinafter referred to as the "measured value").

[0039] The graph shown in Figure 5 shows the relationship between the predicted and actual values ​​of the overall evaluation average score for stairs A to F. The horizontal axis of the graph shows the actual measured value of the overall evaluation average score, and the vertical axis shows the predicted value of the overall evaluation average score. As shown in Figure 5, the predicted and actual measured values ​​of the overall evaluation average score for stairs A to F are roughly consistent. From this, it can be said that by performing calculations using the formula 1, the overall evaluation score can be predicted using the subjective evaluation score and the objective evaluation score.

[0040] Next, measurements using measuring equipment will be described. The applicant installed equipment to measure vibrations when ascending and descending stairs A to F, and performed vibration measurements. The equipment includes a vibration meter 10, a horizontal displacement meter 20, and a vertical displacement meter 30. The equipment will be described below with reference to FIG. 6. Note that the illustration shows an example in which the equipment is installed on stairs 2. The illustration also shows the equipment in a schematic manner.

[0041] The vibrometer 10 shown in FIG. 6(a) is capable of measuring vibrations of a stair 3 of a staircase 2, which is the measurement target. The vibrometer 10 is capable of measuring vibrations in the horizontal and vertical directions. An appropriate acceleration sensor can be used as the vibrometer 10. The vibrometer 10 is installed on a step 3, among the multiple steps 3, that is expected to experience large vibrations. In this embodiment, the vibrometer 10 is installed on a step 3 that is approximately in the center in the vertical direction. The vibrometer 10 is also installed on the underside of the step 3 in the center in the horizontal direction. The vibrometer 10 can be fixed directly to the step 3 without using a jig or the like.

[0042] The horizontal displacement meter 20 shown in Figure 6(a) is capable of measuring the horizontal displacement of the step 3. Like the vibration meter 10, the horizontal displacement meter 20 is installed on the step 3 approximately in the center in the up-down direction. The horizontal displacement meter 20 is installed on one end side in the left-right direction (the right end side in the illustrated example) on the underside of the step 3. The horizontal displacement meter 20 is fixed to the step 3 via an appropriate jig.

[0043] The vertical displacement meter 30 shown in Figure 6(b) is capable of measuring the vertical displacement of the step plate 3. Like the vibration meter 10, the vertical displacement meter 30 is installed on the step plate 3 at approximately the center in the up-down direction. The vertical displacement meter 30 is installed on the underside of the step plate 3 at the center in the left-right direction. The vertical displacement meter 30 is fixed to the step plate 3 via an appropriate jig.

[0044] 7(b) and (c) show the results of measurements carried out by the applicant using the vibration meter 10, horizontal displacement meter 20, and vertical displacement meter 30. Fig. 7(b) shows the results of measurements of horizontal vibration levels (dB) for stairs A to F carried out using the vibration meter 10. Specifically, the results show the average, maximum, minimum, and standard deviation values ​​when measurements were carried out multiple times for stairs A to F using the vibration meter 10.

[0045] 7(c) shows the results of measurements of horizontal and vertical displacements (mm) for stairs A to F, carried out by the applicant using horizontal displacement meter 20 and vertical displacement meter 30. Specifically, the figures show the maximum values ​​of both amplitudes of horizontal displacement obtained when measurements were carried out for stairs A to F using horizontal displacement meter 20, and the maximum values ​​of one amplitude of vertical displacement obtained when measurements were carried out for stairs A to F using vertical displacement meter 30. The above values ​​can be averaged over multiple measurements.

[0046] The applicant analyzed the results of the sensory evaluation and found that, as shown in the table in Figure 7(a), stairs C and E, which have relatively large horizontal sway (vibration level) (see also Figure 3), had relatively large average evaluation scores for each question. Furthermore, when comparing stairs A and B, which have roughly similar vertical sway (displacement), stairs B, which has slightly larger horizontal sway (vibration level and displacement), had a relatively larger average evaluation score for each question than stairs A. From this, it can be said that horizontal sway has a significant impact on the results of the sensory evaluation.

[0047] Furthermore, the applicant further analyzed the measurement results shown in Figure 7(b) and found that there was a high correlation between the horizontal vibration level (dB) measured using the vibration meter 10 and the average subjective evaluation score in the sensory evaluation (see Figure 8(a)). On the other hand, there was a low correlation between the vertical vibration level (dB) and the average subjective evaluation score in the sensory evaluation.

[0048] The applicant performed a regression analysis on the horizontal vibration level and the average subjective evaluation score in the sensory evaluation for each of the stairs A to F. As a result of the regression analysis, it was concluded that the relationship between the horizontal vibration level and the average subjective evaluation score can be roughly expressed by the following mathematical formula 2. (Number 2) Subjective average score = g x horizontal vibration level (dB) - h g:4.041 h:328.936

[0049] As described above, the relationship between the horizontal vibration level and the average subjective evaluation score can be expressed by the formula in Equation 2. Based on this, the applicant believed that the average subjective evaluation score could be predicted using the horizontal vibration level by performing calculations using the formula in Equation 2, and conducted verification. Specifically, the predicted average subjective evaluation score calculated using the formula in Equation 2 based on the horizontal vibration level measured using the vibration meter 10 was compared with the actual measured average subjective evaluation score based on the actual answers to the questions in FIG. 4.

[0050] The graph shown in FIG. 8(b) shows the relationship between the predicted and actually measured subjective evaluation average scores for stairs A to F. The horizontal axis of the graph shows the actually measured subjective evaluation average scores, and the vertical axis shows the predicted subjective evaluation average scores. As shown in the graph, the predicted and actually measured subjective evaluation average scores for stairs A to F are close to each other. From this, it can be said that by performing calculations using Formula 2, it is possible to predict the subjective evaluation score using the horizontal vibration level measured using the vibration meter 10.

[0051] Furthermore, the applicant further analyzed the measurement results shown in Figure 7(c) and found that there is a high correlation between the values ​​based on the measurement results of both the horizontal displacement meter 20 and the vertical displacement meter 30 and the average objective evaluation score in the sensory evaluation. Specifically, it was found that there is a high correlation (large correlation coefficient) between the "horizontal-vertical displacement vector," which is the amount of displacement in the horizontal and vertical directions obtained based on the measurement results of the horizontal displacement meter 20 and the vertical displacement meter 30, and the average objective evaluation score (see Figure 9(a)).

[0052] The applicant performed a regression analysis of the horizontal and vertical displacement vectors and the average objective evaluation score in the sensory evaluation for each of the stairs A to F. As a result of the regression analysis, it was concluded that the relationship between the horizontal and vertical displacement vectors and the average objective evaluation score can be roughly expressed by the following mathematical formula 3. (Number 3) Objective evaluation average score = i × horizontal and vertical displacement vector (mm) + j i:9.413 j:6.436

[0053] As described above, the relationship between the horizontal and vertical displacement vectors and the objective evaluation average score can be expressed by the formula in Equation 3. Based on this, the applicant believed that it would be possible to predict the objective evaluation average score using the horizontal and vertical displacement vectors by performing calculations using the formula in Equation 3, and conducted verification. Specifically, the predicted values ​​of the objective evaluation average score calculated using the formula in Equation 3 based on the horizontal and vertical displacement vectors measured using the horizontal displacement meter 20 and the vertical displacement meter 30 were compared with the actual measured values ​​of the objective evaluation average score based on the actual answers to the questions in FIG. 4.

[0054] The graph shown in Figure 9(b) shows the relationship between the predicted and actual measured values ​​of the objective evaluation average scores for stairs A to F. The horizontal axis of the graph shows the actual measured values ​​of the objective evaluation average scores, and the vertical axis shows the predicted values ​​of the objective evaluation average scores. As shown in the graph, the predicted and actual measured values ​​of the objective evaluation average scores for stairs A to F are close to each other. From this, it can be said that by performing calculations using Formula 3, it is possible to predict the objective evaluation score using the horizontal and vertical displacement vectors measured using the horizontal displacement meter 20 and the vertical displacement meter 30.

[0055] In the above example, the displacement values ​​(horizontal and vertical displacement vectors) measured using the horizontal displacement meter 20 and the vertical displacement meter 30 can also be measured by converting the measurement results of the vibrometer 10. As a result of further analysis by the applicant, it was found that not only the measurement results of the horizontal displacement meter 20 and the vertical displacement meter 30, but also the displacement values ​​(horizontal and vertical displacement vectors) obtained by converting the measurement results of the vibrometer 10 have a high correlation with the average objective evaluation score (large correlation coefficient) (see Figure 9(a)).

[0056] The applicant performed a regression analysis on the horizontal and vertical displacement vectors (hereinafter referred to as "converted values") obtained by converting the measurement results of the vibration meter 10 and the average objective evaluation score in the sensory evaluation for each of the stairs A to F. As a result of the regression analysis, it was concluded that the relationship between the converted values ​​of the vibration meter 10 and the average objective evaluation score can be roughly expressed by the following mathematical formula 4. (Number 4) Objective evaluation average score = k × conversion value (horizontal and vertical displacement vectors (mm) converted from the measurement results of the vibration meter 10) + l k:9.232 l:9.986

[0057] As described above, the relationship between the converted value of the vibration meter 10 and the average objective evaluation score can be expressed by the formula in Equation 4. From this, the applicant thought that by performing calculations using the formula in Equation 4, it would be possible to predict the average objective evaluation score using the converted value of the vibration meter 10, and conducted verification. Specifically, the predicted value of the average objective evaluation score calculated using the formula in Equation 4 based on the converted value of the vibration meter 10 was compared with the actual measured value of the average objective evaluation score based on the actual answers to the questions in FIG. 4.

[0058] The graph shown in Figure 9(c) shows the relationship between the predicted and measured values ​​of the objective evaluation average scores for stairs A to F. The horizontal axis of the graph shows the measured values ​​of the objective evaluation average scores, and the vertical axis shows the predicted values ​​of the objective evaluation average scores. As shown in the graph, the predicted and measured values ​​of the objective evaluation average scores for stairs A to F are close to each other. From this, it can be said that the objective evaluation score can be predicted by performing calculations using the formula (4) and using the horizontal and vertical displacement vectors converted from the measured values ​​of the vibration meter 10.

[0059] The method for evaluating stair sway according to this embodiment is carried out using an evaluation system 1 shown in Fig. 1(a). The evaluation system 1 includes a vibration meter 10, a horizontal displacement meter 20, a vertical displacement meter 30, and a control unit 40. Note that the configurations and installation manners of the vibration meter 10, the horizontal displacement meter 20, and the vertical displacement meter 30 (see Fig. 6) are the same as those already explained, and therefore will not be explained again.

[0060] The control unit 40 is capable of processing various types of information. The control unit 40 includes a processing unit such as a CPU, and storage devices such as RAM and ROM. A personal computer, for example, can be used as the control unit 40. The control unit 40 receives the measured values ​​of the vibration meter 10, the horizontal displacement meter 20, and the vertical displacement meter 30, and uses the input measured values ​​to perform calculations using the above-mentioned mathematical formulas, thereby predicting the evaluation results of the sensory evaluation of the staircase 2.

[0061] 2, the evaluation method according to this embodiment includes a measurement step (S101), a subjective prediction step (S102), an objective prediction step (S103), and a comprehensive prediction step (S104). Each step of the evaluation method according to this embodiment will be described below.

[0062] The measurement step (S101) is a step of installing a vibration meter 10, a horizontal displacement meter 20, and a vertical displacement meter 30 on the stairs 2, and measuring the shaking (vibration and displacement) of the stairs using each device.

[0063] In the measurement step (S101), the measurer uses the vibration meter 10 to measure the horizontal vibration level (dB) of the tread 3 of the staircase 2. The measurer also uses the horizontal displacement meter 20 and the vertical displacement meter 30 to measure the horizontal and vertical displacement of the tread 3, and obtains horizontal and vertical displacement vectors based on these measurements. Each of the above measurements is taken while a user is ascending or descending the staircase 2. Each of the above measurements can be an average value obtained by performing multiple measurements. Each of the above measurements is also input to the control unit 40.

[0064] The subjective prediction step (S102) is a step of predicting a subjective evaluation score using the horizontal vibration level measured in the measurement step (S101) using the vibration meter 10. In the subjective prediction step (S102), the control unit 40 calculates a predicted value of the subjective evaluation score by performing a calculation using the above-mentioned mathematical expression 2.

[0065] The objective prediction step (S103) is a step of predicting an objective evaluation point using the horizontal and vertical displacement vectors measured in the measurement step (S101). In this embodiment, the objective prediction step (S103) uses the horizontal and vertical displacement vectors measured using the horizontal displacement meter 20 and the vertical displacement meter 30. In the objective prediction step (S103), the control unit 40 calculates a predicted value of the objective evaluation point by performing a calculation using the above-mentioned mathematical expression 3.

[0066] The overall prediction step (S104) is a step of predicting an overall evaluation score using the subjective evaluation score calculated in the subjective prediction step (S102) and the objective evaluation score calculated in the objective prediction step (S103). In the overall prediction step (S104), the control unit 40 calculates a predicted value of the overall evaluation score by performing calculations using the above-mentioned mathematical formula 1.

[0067] The evaluation method according to this embodiment has been described above. According to the above method, the result of the sensory evaluation can be predicted simply by measuring the vibration level and horizontal and vertical displacement vectors generated when ascending and descending the stairs 2. Furthermore, according to the above method, simply by performing the measurements, the result of the sensory evaluation can be predicted taking into consideration both the subjective evaluation of the user ascending and descending the stairs 2 and the objective evaluation of others observing the user ascending and descending the stairs 2.

[0068] The evaluation method is not limited to the above-described embodiment, and the content of each step can be modified as appropriate. For example, in the above example, the horizontal and vertical displacement vectors are measured using the horizontal displacement meter 20 and the vertical displacement meter 30 in the measurement step (S101). However, the present invention is not limited to this example. For example, the horizontal and vertical displacement vectors may be measured by converting the vibration values ​​measured by the vibrometer 10. In this case, the horizontal and vertical displacement meter 20 and the vertical displacement meter 30 do not need to be installed on the staircase 2. According to the above configuration, the results of the sensory evaluation can be predicted by installing only one vibrometer 10 and measuring the vibration. According to the above configuration, the results of the sensory evaluation can be predicted even when it is difficult to install the horizontal displacement meter 20 and the vertical displacement meter 30, such as when it is difficult to install a jig. Furthermore, according to this configuration, damage to the wallpaper on the staircase 2 or the wall 5 caused by installing the jig can be prevented.

[0069] In the above example, the objective prediction step (S103) predicts the objective evaluation score using the horizontal and vertical displacement vectors (displacement amounts in the horizontal and vertical directions) measured by the horizontal displacement meter 20 and the vertical displacement meter 30, but the present invention is not limited to this example. For example, it is also possible to adopt a configuration in which the objective evaluation score is predicted using only the horizontal displacement amount instead of the horizontal and vertical displacement vector. In this case, the content of Equation 3 is modified as appropriate. The horizontal displacement amount may be the measurement value of the horizontal displacement meter 20, or a value obtained by converting the vibration value measured by the vibration meter 10.

[0070] As described above, the method for evaluating staircase sway according to one embodiment of the present invention is as follows: A measuring step (S101) of measuring at least the horizontal vibration of the step 3 (staircase 2) and the horizontal and vertical displacement of the step 3; an evaluation prediction step (S102 to S104) of predicting the result of a sensory evaluation of the sway of the stairs 2 using the measurement result of the measurement step (S101); It is equipped with the following.

[0071] This configuration makes it easy to evaluate the vibration of the stairs. That is, the results of the sensory evaluation can be predicted simply by measuring the horizontal vibration of the stairs 2 (treads 3) and the horizontal displacement of the treads 3. This makes it possible to predict the results of the sensory evaluation without the need for extensive work, unlike when actually conducting a sensory evaluation.

[0072] The measuring step (S101) The vertical displacement of the step 3 is also measured.

[0073] With this configuration, the results of the sensory evaluation can be predicted using the measurement results of the horizontal vibration of the step board 3 and the measurement results of the horizontal and vertical displacement of the step board 3 (horizontal and vertical displacement vectors).

[0074] In addition, in the measurement step (S101), A vibration meter 10 installed on the step plate 3 is used to measure horizontal vibration of the step plate 3; A horizontal displacement meter 20 and a vertical displacement meter 30 (displacement meter) are installed on the step 3 to measure the horizontal and vertical displacement of the step.

[0075] With this configuration, the vibration meter 10, horizontal displacement meter 20, and vertical displacement meter 30 can be used to accurately measure the horizontal vibration of the step 3 and the horizontal and vertical displacement of the step 3.

[0076] In addition, in the measurement step (S101), A vibration meter 10 installed on the step plate 3 is used to measure horizontal vibration of the step plate 3; The vibration of the step plate 3 measured by the vibration meter 10 is converted to measure the horizontal and vertical displacement of the step plate 3 .

[0077] With this configuration, the results of the sensory evaluation can be predicted simply by performing measurements using the vibration meter 10. With the above configuration, even if it is difficult to install the horizontal displacement meter 20 and the vertical displacement meter 30, the results of the sensory evaluation can be predicted.

[0078] The evaluation prediction step further includes: The method includes a subjective prediction process (S102) for predicting the results of a subjective evaluation, which is an evaluation of the subjective shaking felt by the user of the stairs 2 while using the stairs 2, based on the measurement results of the horizontal vibration of the step 3 in the measurement process (S101).

[0079] With this configuration, it is possible to predict the results of the sensory evaluation taking into account the results of the subjective evaluation.

[0080] The evaluation prediction step further includes: The method includes an objective prediction process (S103) for predicting the results of an objective evaluation, which is an objective evaluation of the shaking felt by a non-user who is not using the staircase 2 when watching a user of the staircase 2 using the staircase 2, based on the measurement results of the horizontal and vertical displacement of the step 3 in the measurement process (S101).

[0081] With this configuration, it is possible to predict the results of the sensory evaluation taking into account the results of the objective evaluation.

[0082] The evaluation prediction step further includes: a subjective prediction step (S102) for predicting the result of a subjective evaluation, which is an evaluation of the subjective vibration felt by the user of the staircase 2 while using the staircase 2, based on the measurement result of the horizontal vibration of the staircase 3 in the measurement step (S101); an objective prediction step (S103) for predicting the results of an objective evaluation, which is an objective evaluation of the shaking felt by a non-user who is not using the staircase 2 when watching a user of the staircase 2 use the staircase 2, based on the measurement results of the horizontal and vertical displacements of the staircase 3 in the measurement step (S101); It includes:

[0083] With this configuration, it is possible to predict the results of the sensory evaluation taking into account the results of the subjective evaluation and the objective evaluation.

[0084] The evaluation prediction step further includes: It includes a comprehensive prediction process (S104) that predicts the results of the sensory evaluation by predicting the overall sway evaluation of the staircase 2 using the prediction results of the subjective prediction process (S102) and the objective prediction process (S103).

[0085] With this configuration, it is possible to predict the results of a comprehensive sensory evaluation that takes into account the results of both subjective and objective evaluations.

[0086] Moreover, the evaluation system 1 according to one embodiment of the present invention includes: A measuring unit (a vibration meter 10, a horizontal displacement meter 20, and a vertical displacement meter 30) for measuring at least the horizontal vibration of the step 3 (the staircase 2) and the horizontal displacement of the step 3; an evaluation prediction unit (control unit 40) that predicts the result of a sensory evaluation of the sway of the stairs 2 using the measurement results of the measurement unit; It is equipped with the following.

[0087] This configuration makes it easy to evaluate the sway of stairs.

[0088] The horizontal displacement meter 20 and the vertical displacement meter 30 according to this embodiment are one form of the displacement meter according to the present invention. The vibrometer 10, horizontal displacement meter 20, and vertical displacement meter 30 according to this embodiment are one form of a measuring unit according to the present invention. The control unit 40 according to this embodiment is one form of a prediction unit according to the present invention.

[0089] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration and various modifications are possible within the scope of the invention described in the claims. Furthermore, the specific numerical values ​​exemplified in the above description are merely examples and can be modified as desired.

[0090] For example, in the present embodiment, an example has been shown in which the control unit 40 performs calculations using the respective formulas in the subjective prediction step (S102), the objective prediction step (S103), and the comprehensive prediction step (S104), but this is not limited to the above example. For example, the calculations using the respective formulas may be performed by a person without using the control unit 40. In this case, the control unit 40 may not be included in the evaluation system 1.

[0091] Furthermore, the staircase 2 shown in this embodiment is not limited to the above example, and various types of staircases can be used. Specifically, in this embodiment, an example in which a staircase installed inside a house is used as the staircase 2 has been shown, but the present invention is not limited to this embodiment. The staircase 2 can also be a staircase installed indoors (for example, a spiral staircase). Furthermore, the staircase 2 is not limited to a skeleton staircase (open staircase) without risers, and a staircase with risers can also be used. Furthermore, instead of a staircase in which one of the left and right stringers 4 is fixed to the wall 5, a staircase in which both stringers 4 are fixed to the wall 5 can also be used as the staircase 2. [Explanation of symbols]

[0092] 1. Rating System 10 Vibration meter 20 Horizontal displacement meter 30 Vertical displacement meter 40 Control Unit

Claims

1. a measuring step of measuring at least horizontal vibrations of the stairs and horizontal displacements of the stairs; an evaluation prediction step of predicting the result of a sensory evaluation of the sway of the stairs using the measurement results of the measurement step; A method for evaluating the sway of stairs.

2. In the measuring step, further measuring the vertical displacement of the staircase; The method for evaluating stair sway according to claim 1.

3. In the measuring step, measuring horizontal vibrations of the stairs using a vibration meter installed on the stairs; measuring the horizontal and vertical displacements of the stairs using displacement meters installed on the stairs; The method for evaluating sway of stairs according to claim 2.

4. In the measuring step, measuring horizontal vibrations of the stairs using a vibration meter installed on the stairs; measuring horizontal and vertical displacements of the stairs by converting measurements of the vibrations of the stairs using the vibrometer; The method for evaluating sway of stairs according to claim 2.

5. The evaluation prediction step includes: and a subjective prediction step of predicting the result of a subjective evaluation, which is an evaluation of the subjective vibration felt by the user of the stairs while using the stairs, based on the measurement result of the horizontal vibration of the stairs in the measurement step. The method for evaluating sway of stairs according to any one of claims 2 to 4.

6. The evaluation prediction step includes: The method includes an objective prediction step of predicting the result of an objective evaluation, which is an objective evaluation of shaking felt by a non-user who is not using the stairs when watching a user of the stairs using the stairs, based on the measurement results of the horizontal and vertical displacements of the stairs in the measurement step. The method for evaluating sway of stairs according to claim 2.

7. The evaluation prediction step includes: a subjective prediction step of predicting the result of a subjective evaluation, which is an evaluation of the subjective shaking felt by the user of the stairs while using the stairs, based on the measurement result of the horizontal vibration of the stairs in the measurement step; an objective prediction step of predicting the results of an objective evaluation, which is an evaluation of the objective shaking felt by a non-user who is not using the stairs when watching a user of the stairs using the stairs, based on the measurement results of the horizontal and vertical displacements of the stairs in the measurement step; Contains, The method for evaluating sway of stairs according to claim 2.

8. The evaluation prediction step includes: a comprehensive prediction step of predicting a result of the sensory evaluation by predicting an evaluation of a comprehensive swing of the stairs using a prediction result of the subjective prediction step and a prediction result of the objective prediction step; The method for evaluating sway of stairs according to claim 7.

9. A measuring unit that measures at least horizontal vibrations of the stairs and horizontal displacements of the stairs; an evaluation prediction unit that predicts the result of the sensory evaluation of the sway of the stairs using the measurement result of the measurement unit; An evaluation system comprising:

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