JPH03103272A - Control method for floor reaction meter - Google Patents

Abstract

PURPOSE:To quantitatively understand the degree of functional trouble or the degree of functional recovery of a trainee and to intentionally execute the subsequent training by setting specific % of the trainee's weight detected by a detecting means as a threshold, excluding this detection value from an arithmetic object in the case a load applied to the detecting means is below the threshold, and setting it as the arithmetic object only in the case of exceeding the threshold. CONSTITUTION:For instance, trainees of 100kgf weight and 40kgf weight are compared. In this case, a threshold is set to 10kgf, and it is supposed that an error of the whole device in which various errors are accumulated is 5% of a detection value. When the detection value lower than the threshold is excluded from an arithmetic object, the thresholds become 10% and 25%, respectively against the weight, and comparing with a person of 100kgf weight, a ratio in which a person of 40kgf weight is excluded from the operation becomes large naturally. Also, according to a different viewpoint, as for an error to the threshold, 5% to 10kgf becomes 0.5kgf, and when this error is added, the threshold becomes 10+ or -0.5kgf, and when this error is added, the threshold is 10+ or -0.5kgf and becomes 10+ or -0.5% and 25+ or -1.25% against the respective weight. That is, as for a person of 100kgf weight, a portion of <=10.5% is excluded from an arithmetic object, and on the other hand, as for a person of 40kg weight, a portion of <=26.25% becomes an excluded object.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a method of controlling a floor reaction force meter, and specifically relates to a method of controlling a floor reaction force meter used in a dynamic balance function training device for people with functional disabilities.

[Conventional technology]

As society continues to age, the number of people with paralysis or decline in physical function due to illnesses such as stroke is increasing, or reflecting a high-stress society, there is an increase in the number of people in their prime age with motor impairment due to stroke, etc., and traffic accidents. The number of people with disabilities in physical functions, especially motor and balance functions, is increasing due to a variety of factors, including an increase in the number of people with motor dysfunction caused by. Severe impairments often coexist with impairments in other functions, and the possibility of functional recovery is often not expected. However, in cases of mild disability, it has been confirmed based on past treatments and experiments that it is possible to restore function to a level close to that of a healthy person through training, and functional recovery training is performed through various therapies. .

[Problem to be solved by the invention]

Conventionally, various devices have been provided for the above-mentioned functional recovery training, and are used depending on the purpose. Many of these conventional devices were single-purpose devices that focused on specific functions. Namely, there have been used systems in which the floor surface is tilted alternately in the left and right directions of the trainee, systems in which the floor surface is tilted alternately in the front and rear directions, and systems in which the floor surface is continuously moved using an endless track. This type of device is limited to a single function of performing the same exercise repeatedly, so while it is provided as an inexpensive device, it has the problem that compound exercises that are suitable for daily life cannot be performed with a single device. there were. On the other hand, attempts are being made, albeit at the laboratory level, to quantitatively understand the degree of functional recovery of trainees and use it for training. That is, by comparing the trainee's data with that of a healthy person,
The aim is to quantitatively understand the degree of functional impairment or functional recovery of the trainee, and to conduct subsequent training in a planned manner. In this case, a method is mainly used to obtain the movement trajectory of the center of gravity through the feet of the trainee in a standing position, and a floor reaction force meter is used as the detection means. Conventional floor reaction force meters work well when stably installed on a horizontal surface, but load detection becomes inaccurate on inclined or moving surfaces, making them difficult to apply. Now, in such a system for functional training, when a floor reaction force meter as shown in Fig. 3 is used, the lower the load applied to the floor reaction force meter, that is, the lighter the trainee's weight, the easier it is to detect the center of gravity position. The error becomes larger. This is because the loads detected by the detector l03 of the floor reaction force meter 100 are f,
~t4, the length of one side of the floor reaction force meter 100 is 11! ,lly
Then, the coordinates of the center of gravity position on the floor reaction force meter 100 are f , + f Q+ f , + f
, 2. Ideally, when a load is applied to the center (0.0) of the floor reaction force meter 100, each detection! 1103, the load is evenly distributed, txt, = t, -t, demand f4, but in reality, the load distribution becomes uneven due to various mechanical errors. The value obtained by A/D converting the output of each detector 103 is f
1=f+a, f2=f+b. f, W f
+e, f When 4=f+d, the center of gravity position error is Δ
If X, Δy, then f, +f2+f 3+f. 2f, +
f , + f , + f ,
It is found by 2. Also, ( f 1 + f 2 + f
Since 3+ f a) is the total load, it can be said that the error in the above equation becomes larger as the total load is smaller. When the load is extremely small, this error becomes so large that it cannot be ignored, resulting in a practical measurement error that may prevent the objective of functional training from being accurately achieved.

[Objective 1] Therefore, in the present invention, it is an object of the present invention to provide a control method that can perform complex movements such as tilting and movement in any combination, can detect loads well in all conditions, and can minimize detection errors. It is something to do. [Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention is as follows. That is, a support plate, an upper plate disposed opposite to the support plate, a pair of shaft members engaged with either the support plate or the upper plate, and a pair of shaft members engaged with the shaft member and arranged on the upper plate. a bearing member disposed on either a plate or a support plate on which the shaft member is not locked; a plurality of detection means disposed on either opposing surfaces of the upper plate and the support plate; In a floor reaction force meter configured with an arithmetic unit that processes the detection value detected by the detection means, 5% to 15% of the trainee's body weight detected by the detection means is set as a threshold, and the detection means When the applied load is less than the threshold value, this detected value is excluded from the calculation target, and only when the applied load exceeds the threshold value, it is included in the calculation target.

[Example] The present invention will be explained in more detail below based on the drawings. As a practical floor reaction force meter, the one shown in Fig. 3 is effectively used. In such a device, both the upper plate 101 and the support plate 102 cannot be completely rigid bodies, although their rigidity has been sufficiently considered. Therefore, if a load is applied to the upper plate 101, it will inevitably bend, and at the same time, the support plate 192 and the member on which the support plate 102 is placed will also bend. On the other hand, although the detection 1ioa is manufactured with a certain precision, it has a certain range of FA differences. Such deflection and errors of the detector 103 are accumulated and included in the detected value when the load applied to the upper plate TOI is detected by the detection 1103. These errors generally result in a large deflection and a large cumulative error when a large load is applied, and conversely, a small load causes a small deflection and therefore a small cumulative error. Now, in the functional training device that is the object of the present invention, a comparison will be made between trainees whose weights are 100 and 40. Assume now that the threshold value is set to 10kl+, and that the error of the entire device, which is the accumulation of various errors, is 5% of the detected value. When excluding detected values below a threshold from calculation targets,
The threshold values for the weight are 10% and 25%, respectively, and naturally a person with a weight of 401d is excluded from the calculation at a higher rate than a person with a weight of 100k1i. From another perspective, the error for the threshold is 5% for 101d.
Then, it becomes 0.5kl1, and when this error is added, the threshold becomes l
O±0.5- for each body weight 10 soil 0.5
% and 25±1.25%. In other words, the weight is 100kg
For people with &I, 10.5% or less will be excluded from calculations, whereas for people weighing 40 kg, 26.25% or less will be excluded. In other words, when calculations are performed with the same threshold value, one is approximately 171 0 and the other is l/4
This means that data will be excluded. The question then becomes what value is appropriate to set as a threshold value for body weight. As a result of conducting various tests within the scope of the purpose of this application, we found that if the weight is less than 5% of the trainee's body weight, the weight of the upper plate + 01 of the floor reaction force meter and the
Due to the sensitivity of 03, changes in body weight are detected more sensitively than necessary, making it difficult to analyze the detected data. Conversely, if the weight is 15% or more of the trainee's weight, only a large weight shift will be detected, and necessary data will be excluded. Although it varies depending on how the detected value is quantified and for what purpose it is used, approximately 10% is practically appropriate. As shown in FIG. 2, two floor reaction force meters are placed adjacent to each other, and the trainee's left and right feet are placed on each to simultaneously detect the balance and movement of the center of gravity. Therefore,
When the trainee gets on the floor reaction force meter and starts measurement, the center of gravity position is calculated based on the weight applied to the left and right floor reaction force meter, and at the same time, the weight applied to the four detectors 103 of each left and right floor reaction force meter is calculated. The balance of weight on each foot is calculated by the distribution of . Effects of the Invention 1 As described above, the present invention includes a support plate, an upper plate disposed opposite to the support plate, and a set of shaft members locked to either the support plate or the upper plate. , a bearing member that engages with the shaft member and is disposed on a member on the side of the upper plate or the support plate on which the shaft member is not locked; and a 21 facing surface of either the upper plate or the support plate. a plurality of detection means arranged in the
In a floor reaction force meter configured with an arithmetic device that processes the detection value detected by the detection means, 5% to 15% of the trainee's body weight detected by the detection means is set as a threshold, and the detection means If the applied load is less than the threshold value, this detected value is excluded from calculation, and only if it exceeds the threshold value, it is calculated.This makes it easier to perform complex movements such as tilting and moving in any combination. Furthermore, since the load can be detected within an appropriate range according to the trainee's weight, errors can be effectively reduced.

[Brief explanation of drawings]

Fig. 1 is an external view showing an example of a balance function training device, Fig. 2 is a vertical cross-sectional side view of the required cross section of the device shown in Fig. 1, and Fig. 3 is an exploded perspective view of a floor reaction force meter. It is. 9: Arithmetic device l00: Floor reaction force meter 101 = upper plate l02: Support plate 103: Detection means 10
5: Shaft member 106 two-wheel support member

Claims (1)

[Claims] (1) a support plate; an upper plate disposed opposite to the support plate;
A set of shaft members that are locked to either the support plate or the upper plate, and a member that engages with the shaft member and is disposed on the side of the upper plate or the support plate where the shaft member is not locked. A bearing member provided therein, a plurality of detection means provided on opposing surfaces of either the upper plate and the support plate, and an arithmetic device that performs arithmetic processing on the detection values detected by the detection means. In the floor reaction force meter, 5% to 15% of the trainee's body weight detected by the detection means is set as a threshold value, and if the load applied to the detection means is less than the threshold value, this detected value is excluded from the calculation target,
A control method characterized in that calculation is performed only when a threshold value is exceeded.