JPS59168835A - Apparatus for measuring muscle hardness - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 〔Technical field〕 The invention relates to a muscle stiffness measuring device.

[Background technology]

For measuring muscle stiffness, there is a hardness meter that measures the stress-strain curve, and a muscle stiffness meter that measures hardness by applying continuous vibration stimulation (Susumu Tsukahara: muscle combiasis meter; medical electronics and bioengineering, soil-convex). .

57159 (1963)), but there are many difficult problems in measuring the hardness of biological tissues such as muscles. In other words, if the living body is separated from the living body, it will be different from the actual living body, so it is safe to measure at the cost of the living body. However, living organisms are supported by things such as storage metabolism and blood circulation, and what is more complicated is that unlike other industrial products, living organisms are not made of a single substance, but are made of complex composite materials. That's true. Therefore, -I cannot always be accurately determined depending on the situation, and there are individual differences depending on the location of the foot measurement. Even with these problems in mind, it is still necessary to quantitatively understand the hardness of living organisms.

Fig. 1 shows a stress strain meter which is a conventional hardness measuring device. In the figure, fi+ is a biological fabric, (2) is a displacement meter, (3) is a pressure sensor, and (4) is a displacement meter. ) is the retaining cover, (6)
is a jig for pressing. The curve obtained using this device is shown in Figure 2. (2) is the displacement axis, U is the stress axis, 0 is the curve when pressed, and (2) is the return curve with steresis when released. However, due to individual differences and differences depending on the measurement site, it was not possible to accurately measure muscle stiffness.

[Purpose of the invention]

An object of the present invention is to provide a muscle stiffness measuring device that can accurately measure muscle stiffness by reducing measurement errors and variations caused by body movements such as those caused by breathing.

[Disclosure of the invention]

Figure 5 is a circuit configuration diagram of an embodiment of the present invention, in which +6) l'j: vibration detection sensor such as an acceleration sensor;
(7) is a detection unit that detects vibrations based on the vibration detection signal of the vibration detection sensor (6) by time analysis or frequency analysis; (8) is a detection unit that detects vibrations by time analysis or frequency analysis; Store the corresponding vibration top in the internal storage means,
The detecting section (7) compares the commonly used vibration 7-mode with each memorized vibration 7-mode and determines the vibration t-mode that matches.
The known hardness corresponding to the percussion seventh is displayed as a hardness numerically on the display section (9) or by an appropriate display method such as a percrow. FIG. 4 shows the relationship between a vibration detection sensor ff +6+ consisting of a velocity sensor of one embodiment and a sphere (lO) made of an elastic body such as rubber that applies a single impact to the target part of the living body (1). and
When the sphere (1o) is thrown down, a single iti 4 vibration is transmitted to the fk motion detection scissor (6) through the living body (1), and this vibration is converted into an electric 1g. FIG. 5 shows an example of the arrangement of the vibration detection sensor (6) in the case where the part to be measured is the trapezius muscle of the shoulder of a human body.

Now, the vibration converted into an electric signal by the vibration detection sensor (6) becomes a damped signal as shown in FIGS. 0(a) and (b), and the time from the start point to each peak is T1. , T
2.

Assuming T3, the softer the hardness of the part to be measured, the longer Tl
rT2. T3 is long, for example, Tl in FIG. 6(a)
, T2, and T3 are the time periods corresponding to each of No. 61'1(b), T≦, and T3, respectively. In this case, Fig. 6 (
The vibration top in a) shows that the part to be measured is soft, and the vibration top in FIG. 6(b) shows that the part to be measured is hard. Figures 0 (a) and (b) in the hard format of Tsumashi Tani
) are measured and classified in advance, and the classifications are recorded in the recognition section (8). Then, in the detecting section (7), a suitable circuit such as an integrating means measures the time between start and stop at the start of one vibration cycle, and detects the vibration top. The vibration top detection data of the detection unit (7) is read into the recognition unit (8), which compares it with the stored content of the M1 self-occupying storage means, and if there is a matching vibration top, the vibration is recognized. #7-
The hard type data corresponding to the part to be measured is sent to the display section (9), and the hard type of the part to be measured is displayed.

When the frequency of the detection signal from the vibration detection center tt61 is analyzed, the harder the part to be measured is, the higher the frequency component moves, so by analyzing this frequency component, it is possible to determine the stiffness as described above. FIG. 7(a) shows frequency components when the part to be measured is soft, and FIG. 7(b) shows frequency components when the part to be measured is hard.

Now, in the above-mentioned embodiment, the sphere (1o) serving as the impact means and the vibration detection sensor (6) are separate parts, but there is a possibility that measurement errors may occur because vibrations (!-) are detected through the living body (1). .

Therefore, the sphere (1o) serving as the impact means is equipped with a speed sensor (6a), and a vibration detection sensor (6) configured by providing a pressure C+j ('6b) on the surface of the sphere (1o) shakes the J7-. Detection is performed in the embodiment shown in FIG. In this case, when a sphere (1o) made of an elastic material such as rubber is lowered onto a part to be measured, such as the trapezius muscle of a living body (1), as shown in FIG. 6a) detects the acceleration at the time of thrust, and the pressure t+1 (6b) detects the surface power.Based on the calculated signals, the detection unit (7) detects the vibration according to the frequency component or the time axis. #7-Code is detected.

In this embodiment, there is no need to attach the vibration detection sensor (6) to the living body (1), so the measurement can be done by dropping the sphere 1o directly onto the part to be measured as shown in Figure 10. It is easy to use, as you only need to apply a single impact.

Of course, it is also possible to configure an auxiliary detection sensor (6).

[Invention effect]

As mentioned above, the device is equipped with an impact means that applies a single impact to the part of the living body to be measured, so it can apply a single impact to the part of the living body to be measured. Vibration due to single impact by means
- In order to perform the 2nd judgment of detection of the body, the effect of eliminating the error and variation caused by the body movement button that is changed before breathing, and that the correct muscle hardness is measured is achieved.

Shake it into an elastic sphere! By integrally providing the #I detection sensor, errors and variations caused by attaching the vibration detection sensor to a living body can be prevented, and the structure is simple, making it easy to handle.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a conventional example, Figure 2 is a stress-strain characteristic diagram detected by the same method, and Figure 5 is a circuit configuration diagram of an embodiment of this invention, Figures 4 and 5. 6(a), (b) and '7A7(a), (
b) is a measurement diagram for explaining the principle of the vibration top used in the above detection and +II; FIG. 8 is an enlarged sectional view of a sphere of another practical example of the present invention; FIGS. 9 and 10. The figure is an explanatory view of the use of the same as above, FIG. 11 is an enlarged cross-sectional view of a sphere according to another embodiment of the present invention, and (6) is a swing! 1SIJ, (7) is a detection section, (8) is a recognition section, and (10) is a sphere. Agent Patent Attorney Ishi 1) Ai 7 Figure 1 112 Figure s 3 Figure 4 Figure 5 Tsubo f・ 116 Figure (o) (b) (0) (b) 瀉8 Figure 119 Figure 1 Ilo Figure 0 Til 1 Figure

Claims (2)

[Claims] (1) An impact means that applies a single IIJ7d to the part to be measured of the living body, and a vibration interrupter such as a speed sensor or pressure t'J that detects the vibration caused by the single impact applied to the part to be measured of the living body. , a detection means that detects the vibration mode from the detection signal obtained by the vibration detection sensor, and a vibration top mode detected by the detection stage is compared in advance with a vibration top mode corresponding to each hard type adjacent to the measurement. A muscular rigid foot measuring device d0, characterized in that it comprises a recognition means for determining the rigid type of the part to be measured. (2) The scope of the search for the guide needle dd according to item 1, characterized in that the entire impact means is constructed from a sphere made of an elastic material of No. Muscle hardness measuring device.