WO1994028793A1

WO1994028793A1 - Apparatus and method for measurement of muscular tension

Info

Publication number: WO1994028793A1
Application number: PCT/CN1994/000042
Authority: WO
Inventors: Tong Zhang; Yuliang Gu; Gangzhu Wu
Original assignee: Tong Zhang; Yuliang Gu; Gangzhu Wu
Priority date: 1993-06-04
Filing date: 1994-05-31
Publication date: 1994-12-22
Also published as: CN1077026A; AU6840494A

Abstract

An apparatus and method for measurement of muscular tension. The apparatus comprises transmission means, length measurement means, force measurement means, resistance measurement means, amplifying means, filter means, data sampling and processing means, reversible motor and control means, wherein a carriage is connected with a dynamometer sensor in the force measurement means and a bone-shape supporter is concentric with the output shaft, so the apparatus can be used to measure muscular tension quantitatively and qualitatively. The apparatus can also be used as a facilitation trainer.

Description

Muscle tension detecting device and method

The invention relates to a muscle tension detection and analysis device and a muscle tension detection method for the device. Background technique

There are three main forms of abnormal muscle tension increase: folding knife-like increase, lead tube-like increase and gear-like increase. The decrease of muscle tone is manifested by the reduction or disappearance of resistance when exercised, and the range of joint movement expanded. Correct judgment of muscle tone is an extremely important objective indicator for clinical diagnosis, differential diagnosis, and efficacy evaluation. At present, the most commonly used method of measuring muscle tone in the medical field is when the patient's muscles are relaxed, the examiner holds the patient's limbs and repeatedly performs passive extension and flexion exercises at different speeds and amplitudes. This is the slight resistance felt. The measurement of muscle tension in a limb can only be performed qualitatively, and the subjective judgment of the examiner is inevitable. The "Arch phys Med Rehabil" journal published by the United States II in April 1992 introduced the method of measuring muscle tension using biomechanics, mainly measuring torque. This method uses an electric motor to reduce the output shaft to swing at a certain angle through a reduction device. There is a device on the output shaft that can be connected to the part to be measured and can move the part to be measured. When the output shaft drives the part to be measured, the output shaft has a load. Through a torque detector installed on the output shaft The torque change of the output shaft is recorded after the load is applied. This method can detect the approximate change in E tension of a certain part when being moved. It also records the range of joint angle changes and myoelectric signals while measuring the torque. Sometimes even scales are used to infer abnormalities in patient muscle tone. These methods are indirect methods of detecting muscle tone, which can only reflect the general trend of muscle tone changes, but cannot reflect the characteristics of different types of muscle tone changes. Therefore, the qualitative and quantitative analysis of muscle tone is still a difficult and unsolvable problem, and the determination of the manifestations of increased muscle tone is even more impossible. Summary of the Invention

The object of the present invention is to provide a direct detection of muscle tone and accurate analysis. Detection and analysis equipment and method for analyzing muscle tension changes.

The purpose of the present invention is achieved as follows: The muscle tension detection and analysis device is composed of a transmission device, a length measurement device, a force measurement device, a resistance detection device, an amplification and filtering module, a data acquisition and processing system, a reversible motor, and a control system. The length measuring device is composed of a lead screw and a sliding frame moving along the lead screw; the force measuring device is composed of a bracket, a bone-shaped support, a swing arm fixedly connected to the output shaft of the transmission device, and a force fixed on the sliding frame. The sensor is composed of the output signal of the force sensor is transmitted to the amplification and filtering module through a wire. The bone-shaped support is concentric with the output shaft. The upper part of the bone-shaped support has a support ring connected to the shaft. On the slider, there is a shaft at the lower part of the slider, and a force sensor can be installed between the shafts to form a resistance detection device. The output signal of the force sensor enters the amplification and filtering module through a wire; the method established to realize the detection and analysis equipment is:

——Choose a specific part as the fulcrum and fix the fulcrum to the support ring;

——Fix the far end of the fulcrum of the measured part with the force sensor;

——The transmission device drives the distal end of the limb to be reciprocated with the fulcrum as the axis through the force sensor;

——The output signals of the force sensor located on the sliding frame and the force sensor located in the bone-shaped support are input to the data acquisition and processing system for data processing through the amplification and filtering modules.

The advantages of the invention are:

1. Is a direct detection method, which can intuitively reflect the amount of change and characteristics.

2. The accuracy of this method and equipment is high because it overcomes the interference of some external factors, especially the effects of unrelated forces, such as skin nibs, inertial forces, and gravity.

3. The detection area of this equipment is wide and can be compared with other parts.

4. When using this method and equipment for testing, selecting a specific part, especially a bony landmark as a fulcrum, can fully relax the muscle tissue near the fulcrum, thereby reducing the effect on the muscle tension of the measured part.

5. This equipment can be used as a trainer.

6. This equipment can be used for humans and experimental animals. Overview of the drawings.

Figure 1 shows the overall structure of the device;

Figure 2 is a schematic structural diagram of a transmission device;

FIG. 3 is a schematic structural diagram of a length detecting device and a force measuring device;

4 is a schematic cross-sectional view of a bone-shaped support and a resistance detection device;

5 is a schematic cross-sectional view of a hand-shaped supporter;

FIG. 6 is a flowchart of a main program of the present invention; a preferred embodiment of the present invention

A detailed description is given below in conjunction with the drawings:

As shown in FIG. 1, the muscle tension detection and analysis device according to the present invention includes a transmission device 1, a force measurement device 5, a length measurement device 39, a resistance detection device 8, an amplification module 40, a filtering module 41, and a data acquisition and processing system 7. , And reversible motor and control system 14. As shown in FIG. 2, the transmission device includes two parts of deceleration and steering. The reversible motor 15 is connected to the worm gear pair 17 and the bevel gear pair 22 through a coupling 16. The bevel gear pair 22 is connected to the transmission output shaft 2. A friction plate 19 can be connected between the connecting shafts 18 and 20 of the umbrella tooth pair 22. A spring and a nut 21 can be installed behind the friction plate, and a positive pressure can be applied to adjust the overload amount. The reversible motor 15 can be a stepping motor or a torque motor. The swing range can be adjusted arbitrarily, and the optimal range can be between 0 ° and 90 °. As shown in FIG. 3, the force-measuring device includes a bone-shaped support 6, a bracket 3, and a swing arm 26 fixedly connected to the output shaft 2 of the transmission device. One side of the swing arm 26 can be connected to the slide frame 25 through a guide rail, or The swivel arm 26 is integrated with the sliding frame 25. A force sensor 23 can be connected to the sliding frame 25, and the other end of the force sensor 23 can be a gripper 24. The swivel arm 26 can be horizontally or vertically or inclined. The output shaft 2 The connection with the swing arm 26 may be a fixed connection, or a key slot may be provided on the output shaft 2. The swing arm is fixed at different positions on the key slot with pins, so that different heights of the swing arm can be adjusted, and the holder 24 can be adjusted according to the clamped position. The shape of the holding part. The length measuring device is composed of a screw 4 and a sliding frame 25 that moves horizontally along the screw 4. One end of the screw 4 is fixed on the bracket 3. The rotary arm 26 can have a scale. The sliding frame 25 can be driven along the wire by the motor. When the lever is moved, you can directly read the data and send it to the data acquisition and processing system 7, or you can install a contactor 32 on the slide 25 to extract the length detection signal, and then zoom in and filter After the wave is processed, it is sent to the data collection and processing system 7. As shown in FIG. 4, the upper part of the bone-shaped supporter 6 is provided with a support ring 27 connected to the shaft 28. The shaft 28 may be equipped with a bearing, in particular, a one-way thrust bearing 29 may be installed and mounted on the slider 30 together. Below the block 30 may be a shaft 33, and a force sensor 31 may be installed between the shafts, so that the bone-shaped support and the force sensor 31 constitute a resistance detection device. As shown in FIG. 5, the hand-shaped supporter is composed of a hand-shaped clamp 35 connected to a shaft 37 through a bearing 36. The upper part of the hand-shaped clamp 35 may be two symmetrical plates, and the inside of the symmetrical plate is an inclined surface, forming a “V” -shaped groove surface, the inclined surface. A sponge-like material 34 is provided, and the width between the symmetrical plates is adjustable. The lower part of the hand-shaped clamp 35 is in the shape of a circular tube connected to the bearing, especially the one-way thrust bearing 36. The circular tube has a lever 38 on one side and a lever The other end of 38 is fixed to the holder 24. The bone-shaped support or hand-shaped support can be fixed on the bracket 3 or directly on the swing arm 26. The bone-shaped support or hand-shaped support should be kept concentric with the output shaft 2. The data acquisition and processing system 7 may be constituted by a computer system. This computer system may include data acquisition, A / D conversion, external storage, display, printing, parameter setting, etc., as shown in FIG. Set relevant parameters on the computer screen, such as cycle, angle, number of times, limit values, etc., and then start the reversible motor 15 to work through the control system (the control system may include the drive power, drive circuit and driver program of the reversible motor), reversible The motor 15 drives the movement of the measured part, and the electrical signal of the muscle tension of the measured part is obtained through the force sensor 23. This electric signal is amplified, filtered, sampled, and A / D converted and sent to the computer for processing. At the same time, the resistance detection device The medium force sensor 31 receives an electric signal of the gravity friction force of a measured part, and sends it to a computer for processing after being amplified, filtered, sampled, and A / D converted.

When using this device to detect muscle tension in a part of the human body, a specific part of the human body is selected as the fulcrum, and the specific part should be an adjacent bone mark. For example, when detecting the tension of the upper limb extensors and flexors, a bone-shaped support can be selected as the support frame. Select the internal epicondyle of the humerus as the fulcrum and tightly combine the fulcrum with the support ring 27 to eliminate the effect of the friction between the skin and the support ring on the system. Select the distal part of the fulcrum, such as the wrist, and place it in the holder 24 Clamp, the radius of the forearm is driven by the reversible motor 15 to perform horizontal reciprocating circular motion; when measuring the lower limbs, the inner side of the knee joint can be selected as the fulcrum, and the horizontal reciprocating circular motion using the calf as the radius; or the medial ankle, The lateral malleolus is used as a fulcrum, and a horizontal reciprocating circular motion is performed with the foot length as a radius. When measuring the tension of the pronation and supination of the upper limbs, the hand support can be selected as the support frame, and the hand is placed in the hand clamp 34 The middle lever is fixed, and the lever 38 is fixed on the holder 24, so that the arm reciprocates with the middle finger as the axis under the reversible motor. At this time, the pull rod 38 also moves accordingly, and the holder 24 can pass through the holder 24. The measured muscle tension is obtained on the force sensor 23.

And can be used as a facilitator

Claims

Rights request

1. A muscle tension detection and analysis device comprising a transmission device (1), a length detection device (39), a force measurement device (5), a resistance detection device (8), a data acquisition and processing system (7), and a reversible motor And control system (14), wherein the force measuring device (5) is a swing arm (26), a holder (24), a bone-shaped support (6) and a bracket (3) fixedly connected to the output shaft of the transmission device. The force measuring device (5) includes a force sensor (23), the force sensor (23) is connected to the sliding frame (25), and the signal output end of the force sensor (23) is connected to an amplification module (40), The input end of the filtering module (41), the bone-shaped support (6) and the output shaft (2) are concentric.

The muscle tension detection and analysis device according to claim 1, characterized in that: the upper part of the bone-shaped support (6) is provided with a support ring (27) connected to the shaft (28), and the shaft (28) is externally provided with a bearing (2) 33).

3. The muscle tension detection and analysis device according to claim 1 or 2, characterized in that: a shaft (33) is provided in the bone-shaped support, and a force sensor (31) and a force sensor (31) are arranged between the shafts (33). The signal output terminal is connected to the input terminal of the amplifier module (40) and the filter module (41).

The muscle tension detection and analysis device according to claim 1, characterized in that: the bone-shaped support (6) is composed of a hand-shaped clamp (35) and a shaft (37) connected through a bearing (36), and the hand-shaped clamp (35) The lower part is in the shape of a circular tube. One end of the circular tube is provided with a lever (38), and the other end of the lever (38) is fixed on the force sensor (23).

5. A method for detecting muscle tone, comprising the following steps:

a) Select the bony mark as the fulcrum, and fix the fulcrum with the support ring (27); b) fix the distal end of the fulcrum of the measured part with the force sensor (23);

c. The transmission device (1) drives the distal end of the limb to be reciprocated by using the force sensor (23) as a pivot;

d. The data acquisition and processing system receives and processes the output signals of the force sensor (23) and the force sensor (31) through the amplification module (40) and the filtering module (41).

6. The method for detecting muscle tone according to claim 5, wherein the bony landmark in step (a) is the epicondyle of the humerus.

7. The method for detecting muscle tone according to claim 5, characterized in that in step (a) The bony landmark is the medial malleolus. .

8. The method for detecting muscle tone according to claim 5, wherein in step (a), the bony landmark is a lateral malleolus.

9. The method for detecting muscle tone according to claim 5, characterized in that, in step (a), selecting a human bony landmark as a fulcrum is selecting the inside of a knee joint as a fulcrum.

10. The method for detecting muscle tone according to claim 5, characterized in that the hand is selected to be fixed with a hand clip (35) on the hand support, and the reversible motor is supported by the transmission device (1) with a hand clip (35) and a middle finger. Reciprocate the shaft.