CN112082773B - Comfortable verification device and evaluation method for footrest - Google Patents
Comfortable verification device and evaluation method for footrest Download PDFInfo
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Abstract
The invention provides a comfortable verification device and an evaluation method for a footrest, which comprise a human-machine test platform, a base, a footrest body, a length adjustment movable plate and a width adjustment movable plate, wherein the position (X direction and Y direction), the angle, the length and the width of the footrest body relative to a floor of the human-machine test platform can be adjusted, a plurality of parameters of the footrest verification device are adjusted through a systematic evaluation method so as to seek an optimal footrest arrangement scheme.
Description
Technical Field
The invention belongs to the technical field of vehicle ergonomics, and particularly relates to a footrest comfort verification device and an evaluation method.
Background
The automobile development design needs to set relevant parameters of human engineering in the early stage, comfort evaluation is carried out by simulating the real automobile state according to the preliminarily set parameters through an adjustable stop-leg device on a human testing platform, the relation between different degrees of freedom of the stop-leg and subjective feeling of a human body is established, the arrangement parameters are corrected according to the evaluation result, and the problems of cycle and cost caused by engineering change in the later stage can be solved.
The existing adjustable foot rest device has certain defects, the size of the foot rest plate can not be adjusted, under the actual working condition, the existing foot rest plate is not comfortable due to the fact that the width or the length of the existing foot rest plate is not enough, the existing foot rest plate is a whole block of inclined plate with fixed size, and the size of the actual foot rest plate can not be simulated.
In addition, the conventional adjustable footrest apparatus only describes how to adjust the position and angle of the footrest, and how to evaluate the apparatus is not described.
Disclosure of Invention
Aiming at the problems, the invention provides a device for verifying the comfort of the footrest and an evaluation method, wherein the length and the width of the footrest can be adjusted by splitting the footrest into three parts; also disclosed is an evaluation method with which the arrangement of the toe rest plates is adjusted in accordance with the evaluation results, and the evaluation results are improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a rest for a rest on foot board travelling comfort verification device, its characterized in that, includes man-machine test platform, base, rest for a rest on the foot board body, length adjustment fly leaf and width adjustment fly leaf, a plurality of base locating holes of equipartition on the man-machine test platform, be equipped with the base constant head tank on the base, be fixed in man-machine test platform through the bolt, a plurality of adjusting locating holes of equipartition on the rest for a rest on the foot board body are equipped with articulated seat on the bottom surface, and it is articulated through the round pin axle with the base, be equipped with the length adjustment groove along vertically on the length adjustment fly leaf, link to each other with the rest for a rest on the foot board body through the bolt, be equipped with the width adjustment groove along transversely on the width adjustment fly leaf, link to each other with the rest for a rest on the foot board body through the bolt.
According to the scheme, the top surface of the footrest body is provided with the longitudinal sliding groove, the bottom surface of the length adjusting movable plate is provided with the convex strip at the corresponding position, and the sliding groove and the convex strip are clamped and configured.
According to the scheme, the base and the width adjusting movable plate are both of L-shaped plate structures.
The evaluation method of the footrest comfort verification device is characterized by comprising the following steps of:
s1) determining the evaluation parameters: the distance L of the footrest bottom in the X direction with respect to the design point R point specified by the vehicle manufacturer for each seating position1Distance L of the right side line of the footrest relative to the point R in the Y direction2The angle theta of the footrest relative to the XY plane, the length l of the footrest and the width h of the footrest;
s2) comfort evaluation method: the comfort of the footrest is evaluated by a target user with the height conforming to normal distribution, the evaluation of the comfort of the target user is embodied in a scoring mode, the five variables are scored according to a seven-point system standard, one variable is worst unbearable, one is no, so-called acceptable, and the other variable is perfect, and complaint points of the user are recorded;
s3) parameter adjustment: the target user scores five parameters influencing the comfort of the foot resting plate, if the comprehensive score is more than or equal to 4, the comfort of the foot resting plate is acceptable to the target user, and adjustment is not needed; if the comprehensive score is less than 4, the comfort of the footrest is unacceptable to the target user, adjustment is needed, and five parameters influencing the comfort of the footrest are adjusted after the essential reasons of complaint points caused by specific analysis are analyzed;
s4) determining the optimization parameters: and after parameter adjustment is carried out on complaint points of the target user, the target user is requested to carry out evaluation again until the evaluation score is more than or equal to 4, and five parameter values at the moment are recorded, namely the optimization scheme is obtained.
According to the above scheme, the adjusting five parameters according to the complaining points in step S3) specifically includes the following steps:
when the complaint point of the target user is that the foot resting plate is short, the length of the foot resting plate body is selected to be increased; when the complaint point of the target user is that the left foot sole is stepped on, the width of the foot resting plate body is selected to be increased; when the complaint point of the target user is that the hip joint is uncomfortable, the distance of the right side line of the leg rest board body relative to the R point in the Y direction is selected to be reduced or increased according to the condition that the feet of the target user are in the inner side or the outer side;
when the complaint point of the target user is that the knee joint is uncomfortable, the distance of the bottom of the resting foot plate body relative to the R point in the X direction is selected to be reduced or increased according to the condition that the angle between the thigh and the shank of the target user is too large or too small; when the complaint point of the target user is that the ankle joint is uncomfortable, selecting to reduce or increase the angle of the footrest relative to the XY plane according to the condition that the angle between the lower leg and the instep of the target user is too small or too large;
when a target user feels that the left leg knee joint and the left ankle joint are uncomfortable, which parameter influences the comfort cannot be judged, and the relation between the left leg knee joint and the left ankle joint is deduced by counting the data relation between the left leg knee joint and the left ankle joint and the sitting posture of a human body, and the relation between the left leg knee joint and the left ankle joint is as follows:
0.0933×l-0.7436×θ＝38
according to the relation, when one parameter value of the distance 1 of the bottom of the footrest relative to the point R in the X direction and the angle theta of the footrest relative to the XY plane is adjusted, the other value is corrected.
The invention has the beneficial effects that: the comfort verification device and the evaluation method of the footrest are provided, the adjustment of the footrest verification device can relate to a plurality of parameters, and the position (X direction and Y direction) of the footrest body relative to the floor of the man-machine test platform can be adjusted; the angle of the foot rest board body can be adjusted; the length and the width of the footrest can be adjusted to truly simulate the real vehicle state, the comfort of a target user with the height in accordance with normal distribution to the footrest is evaluated by a systematic evaluation method, a plurality of parameters of the footrest verification device are adjusted according to the evaluation result of the user to seek an optimized footrest arrangement scheme, meanwhile, the distance L of the footrest bottom relative to the R point in the X direction and the angle theta of the footrest relative to the XY plane in the arrangement parameters are not mutually independent factors, and the relational expression between the two parameters is derived according to the relational expression between the two parameters and the sitting posture, so that the two parameters can be synchronously adjusted, the evaluation times are reduced, and the evaluation efficiency is improved.
Drawings
Fig. 1 is a schematic view of a footrest comfort verifying device according to one embodiment of the invention.
FIG. 2 is an isometric view of a footrest comfort verification device in accordance with one embodiment of the present invention.
FIG. 3 is a schematic diagram of a portion of an evaluation parameter in accordance with an embodiment of the present invention.
FIG. 4 is a schematic diagram of another portion of the evaluation parameters according to one embodiment of the present invention.
FIG. 5 is a flow chart of a comfort evaluation method of the footrest according to an embodiment of the invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in figures 1-2, a comfortable device for a resting plate comprises a man-machine test platform 1, a base 2, a resting plate body 3, a length adjusting movable plate 4 and a width adjusting movable plate 5, wherein a plurality of base positioning holes 6 are uniformly distributed on the man-machine test platform, a base positioning groove 7 is arranged on the upper edge of the base, the resting plate is fixed on the man-machine test platform through bolts, and the X-direction position and the Y-direction position of the resting plate body can be adjusted by changing the installation position of the base. A plurality of adjusting positioning holes 8 are uniformly distributed on the board body, a hinge seat 9 is arranged on the bottom surface and is hinged with the base through a pin shaft, so that the board body can rotate around the pin shaft, and the angle of the board body is adjusted. The length adjusting movable plate is longitudinally provided with a length adjusting groove 10 and is connected with the footrest body through a bolt, and the length adjusting movable plate can be longitudinally adjusted in position to adjust the length of the footrest body. The width adjustment movable plate is transversely provided with a width adjustment groove 11 and is connected with the footrest body through a bolt, and the width adjustment movable plate can be transversely adjusted in position to adjust the width of the footrest body.
The top surface of the footrest body is provided with a longitudinal sliding groove, the bottom surface of the length adjusting movable plate is provided with a convex strip at a corresponding position, and the sliding groove and the convex strip are clamped and configured, so that the length adjusting movable plate can be longitudinally slidably adjusted conveniently, and the limiting effect is achieved.
The base and the width adjusting movable plate are both L-shaped plate structures.
The adjustment of the footrest verification device can relate to a plurality of parameters, and the position (X direction and Y direction) of the footrest body relative to the human-machine test platform can be adjusted; the angle of the foot rest board body can be adjusted; and the length and the width of the foot resting plate can be adjusted. Through a systematic evaluation method, a plurality of parameters of the footrest verification device are adjusted to seek an optimized footrest arrangement scheme.
As shown in fig. 3 to 5, the specific evaluation method is as follows:
first, the meaning represented by five parameters of the developed vehicle model is obtained in the data: the distance L of the footrest bottom in the X direction with respect to the design point R point specified by the vehicle manufacturer for each seating position1The right side of the footrestDistance L of line in Y direction relative to R point2The angle theta of the footrest relative to the XY plane, the length l of the footrest and the width h of the footrest.
Next, a brief explanation is given of how the above five parameters are adjusted on the authentication apparatus. The distance L of the bottom of the footrest relative to the R point in the X direction can be adjusted by adjusting the positioning hole of the base on the floor of the man-machine test platform1Distance L of the right side line of the footrest relative to the point R in the Y direction2. The angle theta of the footrest relative to the XY plane can be adjusted through the rotation angle of the footrest body relative to the rotating shaft. The length l of the footrest and the width h of the footrest can be adjusted by adjusting the positions of the movable inclined plate and the width of the footrest through the length adjustment of the footrest and the position movement of the width adjustment of the footrest.
It should be noted here that although the five parameters described above are influenced by different degrees (weights) on the human comfort feeling, the five parameters described above affect different parts of the human body, and therefore, it is difficult to give weights to the scores of the five parameters. Meanwhile, the comfort evaluation device of the footrest aims at carrying out targeted adjustment on parameters causing discomfort, so that the overall score of comfort is improved, and therefore, no priority exists in the adjustment of the five parameters.
And then, the comfort of the footrest is evaluated by target users with the organization height conforming to the normal distribution, the comfort evaluation of the footrest by the target users with the organization height conforming to the normal distribution is fully considered, the comfort evaluation of the footrest by the target users with the organization height conforming to the normal distribution is carried out, and the optimization scheme for arranging the footrest can meet the comfort requirements of most users.
The evaluation of the comfort of the target user is embodied in the form of scoring. The above 5 variables were scored on a 7 point scale, with 1 point being the worst intolerable, 4 points being no so-called acceptable, 7 points being perfect, and the points of complaints from the user were recorded. FIG. 5 is a detailed operation rule of the comfort evaluation process of the footrest for performing feedback adjustment of the device according to the evaluation result of the user.
The comfort evaluation device of the footrest aims at targeted adjustment of parameters causing discomfort, and the process of parameter adjustment will be briefly described below.
Firstly, a target user with the organization height in accordance with normal distribution scores 5 parameters influencing the comfort of the foot rest plate, and if the comprehensive score is more than or equal to 4, the comfort of the foot rest plate is acceptable to the target user and does not need to be adjusted; if the composite score is less than 4, the comfort of the toe box is unacceptable for the target user, and adjustment is needed.
The target user's complaint points then need to be recorded as a direction for subsequent footrest comfort adjustment. Complaints from the target user may be hip discomfort, shortness of the footrest, left foot sole stepping empty, knee discomfort, and ankle discomfort, among others. After analyzing the essential reasons of the complaint points, 5 parameters influencing the comfort of the footrest can be adjusted.
When the target user complains that the footrest is short, the length of the footrest plate can be selected to be increased. The width of the footrest may be selected to be increased when the target user's complaint point is that the left foot is being stepped on. When the complaint point of the target user is that the hip joint is uncomfortable, the distance of the right side line of the footrest from the point R in the Y direction may be selected to be decreased or increased depending on whether the target user's foot is inside or outside. The adjustment of the three parameters can be carried out quickly according to the visual feeling complained by the target user.
When the complaint point of the target user is that the knee joint is uncomfortable, the distance of the bottom of the footrest relative to the point R in the X direction can be selectively reduced or increased according to the condition that the angle between the thigh and the shank of the target user is too large or too small. When the complaint point of the target user is that the ankle joint is uncomfortable, the angle of the footrest relative to the XY plane may be selected to be decreased or increased according to whether the angle of the calf of the target user with the instep is too small or too large.
The distance of the bottom of the footrest relative to the point R in the X direction and the angle of the footrest relative to the XY plane are not independent factors. When a target user feels that the left leg knee joint and the left ankle joint are uncomfortable, which parameter influences the comfort may not be judged, and the relation between the left leg knee joint and the left ankle joint is deduced by counting the data relation between the left leg knee joint and the left ankle joint and the sitting posture of a human body, wherein the relation between the left leg knee joint and the human ankle joint is as follows:
0.0933X the distance in the X direction of the footrest bottom relative to the point R-0.7436X the angle of the footrest relative to the XY plane 38
According to the relation, when one parameter value of the distance of the bottom of the footrest relative to the point R in the X direction and the angle of the footrest relative to the XY plane is adjusted, the other value is corrected.
And after parameter adjustment is carried out on the complaint points of the target user, the target user is requested to carry out evaluation again until the evaluation score G is more than or equal to 4, and five parameter values at the moment are recorded, namely the optimal solution is obtained.
Claims (2)
1. A method for evaluating a comfortable checking device of a footrest comprises a man-machine test platform, a base, a footrest body, a length adjusting movable plate and a width adjusting movable plate, wherein a plurality of base positioning holes are uniformly distributed on the man-machine test platform, a base positioning groove is arranged on the upper edge of the base and is fixed on the man-machine test platform through a bolt, a plurality of adjusting positioning holes are uniformly distributed on the footrest body, a hinged seat is arranged on the bottom surface and is hinged with the base through a pin shaft, a length adjusting groove is longitudinally arranged on the length adjusting movable plate and is connected with the footrest body through a bolt, a width adjusting groove is transversely arranged on the width adjusting movable plate and is connected with the footrest body through a bolt, a longitudinal sliding groove is arranged on the top surface of the footrest body, a convex strip is arranged on the bottom surface of the length adjusting movable plate, and the sliding groove and the convex strip are clamped and configured, the base and the width adjustment movable plate are both L-shaped plate structures, and the method is characterized by comprising the following steps:
s1) determining the evaluation parameters: the distance L of the footrest bottom in the X direction with respect to the design point R point specified by the vehicle manufacturer for each seating position1Distance L of the right side line of the footrest relative to the point R in the Y direction2The angle theta of the footrest relative to the XY plane, the length l of the footrest and the width of the footresth；
S2) comfort evaluation method: the comfort of the footrest is evaluated by a target user with the height conforming to normal distribution, the evaluation of the comfort of the target user is embodied in a scoring mode, the five variables are scored according to a seven-point system standard, one variable is worst unbearable, one is no, so-called acceptable, and the other variable is perfect, and complaint points of the user are recorded;
s3) parameter adjustment: the target user scores five parameters influencing the comfort of the foot resting plate, if the comprehensive score is more than or equal to 4, the comfort of the foot resting plate is acceptable to the target user, and adjustment is not needed; if the comprehensive score is less than 4, the comfort of the footrest is unacceptable to the target user, adjustment is needed, and five parameters influencing the comfort of the footrest are adjusted after the essential reasons of complaint points caused by specific analysis are analyzed;
s4) determining the optimization parameters: and after parameter adjustment is carried out on complaint points of the target user, the target user is requested to carry out evaluation again until the evaluation score is more than or equal to 4, and five parameter values at the moment are recorded, namely the optimization scheme is obtained.
2. The method for evaluating the comfort verifying device of the footrest as recited in claim 1, wherein the step S3) of adjusting five parameters according to the complaint points comprises the following steps:
when the complaint point of the target user is that the foot resting plate is short, the length of the foot resting plate body is selected to be increased; when the complaint point of the target user is that the left foot sole is stepped on, the width of the foot resting plate body is selected to be increased; when the complaint point of the target user is that the hip joint is uncomfortable, the distance of the right side line of the leg rest board body relative to the R point in the Y direction is selected to be reduced or increased according to the condition that the feet of the target user are in the inner side or the outer side;
when the complaint point of the target user is that the knee joint is uncomfortable, the distance of the bottom of the resting foot plate body relative to the R point in the X direction is selected to be reduced or increased according to the condition that the angle between the thigh and the shank of the target user is too large or too small; when the complaint point of the target user is that the ankle joint is uncomfortable, selecting to reduce or increase the angle of the footrest relative to the XY plane according to the condition that the angle between the lower leg and the instep of the target user is too small or too large;
when a target user feels that the left leg knee joint and the left ankle joint are uncomfortable, which parameter influences the comfort cannot be judged, and the relation between the left leg knee joint and the left ankle joint is deduced by counting the data relation between the left leg knee joint and the left ankle joint and the sitting posture of a human body, and the relation between the left leg knee joint and the left ankle joint is as follows:
0.0933×l-0.7436×θ＝38
according to the relation, when one parameter value of the distance 1 of the bottom of the footrest relative to the point R in the X direction and the angle theta of the footrest relative to the XY plane is adjusted, the other value is corrected.
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