DE102005051960B3 - Method for recording movements of person and transferring movement of descriptive signals to electronic control module involves movements, which are jumps and are carried out by person on trampoline for therapeutic or sport purposes - Google Patents

Abstract

The method involves recording the movements, which are jumps and are carried out by the person on trampoline (1) for therapeutic or sport purposes. The sinking depth and bouncing point of the person are determined by recording the deformation of the jumping sheet. The deformation values, provided as analogue electrical signals, are converted into digital signals by control module (6) and are assigned to data processing device, e.g. computer (7), and the deformation of the jumping sheet is indicated in three dimensional representation in an optical equipment, e.g. display (8). An independent claim is also included for the device for implementation of the method.

Description

The The invention relates to a method and a device for detection of a person's movements on a sports and therapy device used Trampoline and the transmission the signals representing the movements to an electronic Control module to the movements as deformations of the trampoline-jumping cloth to display on a display.

In the past Years were a variety of therapy and exercise equipment for rehabilitation medicine of a subject and for developed the training structure of an athlete. In the context of therapy treatments are physiotherapy, training therapy and physiotherapy in mind a complex therapy linked together in a planned way.

there have bounce measurements for the performance diagnostics have a significant importance to the training condition or the therapy state of the muscles of an athlete or test persons in terms of To measure speed, coordination and endurance. To be measured doing both individual jumps as also multiple jumps, where a number of jumps follow each other directly.

The measurement of the vertical bounce of the legs, especially of the musculature, from which then a number of parameters, such as the jump height and the jump performance, can be determined by means of measuring platforms, as in US 59 13 242 A presented. Force measuring sensors, which continuously measure the bounce, are installed in the measuring platforms. These measured values are sent to an evaluation device, eg. As a computer, forwarded and from this these developed measurement results are shown, for example in the form of curves of the force curve. This solution gives quite good results for the determination of the jump height of a single jump, with multiple jumps fails this approach, since the critical values of the initial conditions for the acceleration at the first integration and for the speed at the second integration of the final conditions of each preceding jump depend. Small measurement and integration errors add up so badly in multiple jumps that the jump heights can no longer be properly and clearly calculated and especially for longer jump series lead to completely useless results, so that with the DE 100 40 623 A1 a method for determining the jump heights in multiple jumps is presented, with which the force curve of each jump is integrated with the following boundary conditions twice. Thus, after each first integration, the speed in the middle of the flight time interval between two individual jumps is set equal to 0 and every other integation is assumed for the speed index to be calculated from a constant initial height at the time of takeoff.

With This procedure may well be the determination the jump heights of multiple jumps to be determined, however, the presented method is only applicable for determining the respective jumping height of the subject or the athlete, further statements are not possible with this method.

A trampoline of the type described above describes the DE 20 2004 016 378 U 1, which is characterized by a magnet attachable to the jumping cloth of a trampoline and a fastened to the frame of a trampoline with respect to the magnet sensor and a connectable to the sensor computer, which is formed with a display.

the Users of the trampoline thus becomes a control option given regarding the jumps on the trampoline. Further statements, the for a rehabilitation or therapy of a subject or the Performance training structure of an athlete necessary and advantageous would, are with this solution not feasible.

task The invention therefore, as far as possible, the above-described disadvantages to overcome and a method and device for detecting movements a person and their transfer and to develop presentation and usable as a sports and therapy device Provide trampoline, which is simple in construction, reliable in Use and inexpensive is in production.

These The object is in a method and a device of the beginning mentioned type solved by the features of claims 1 and 4.

In the dependent claims advantageous embodiments of the subject matter of the invention are characterized.

According to the invention Is it possible, the physiological and physical parameters of a jump on a therapy training device, in particular a trampoline, to capture, match and visually display.

So, from the deformation of the jump cloth, which causes the user of the trampoline, namely the detection of the penetration of the user on the jumping mat or the detection of the jump point, values determined and converted into electrical signals, which by suitable algorithms to a three-dimensional representation of the deformation of the jumping cloth and thus the jumps or to serve the evaluation of the jumps.

With The invention is characterized by the three-dimensional detection of penetration the jumping cloth possible, physiological parameters such as bounce and attenuation or physical parameters like jump height, Hopping frequency, take-off acceleration, take-off speed, done work, support time, Flight time, climb time, weight and other parameters, such as the number of jumps to determine.

To has the device according to the invention Receiving modules for Signals indicating the movements / strains applied to the hammock correspond, which with an interface for producing a formed electrical connection to an electronic control module are, wherein the electronic control module connected to a computer which is equipped with a display for visual display of the received equipped with electrical impulses.

The Receive modules are designed as sensors, so as potentiometric Sensors, angle encoders or force sensors and everyone is used upcoming sensor is connected to a microcontroller, with the the signals from the sensors are converted into an electrical signal, which then over the electronic control module is transferred to a computer. The transfer takes place serially over standardized interfaces, such as B. USB, RS232 or similar Form or wireless, for example as Bluetooth or WLAN.

According to the invention are between the jumping sheet and the frame of a trampoline sensors provided, on the one hand to the jumping sheet and the other on the frame attached to the trampoline. It is essential to the invention that the sensors used on each of two axes, the x and y axes are attached. The y-axis passes through the center of the trampoline in Viewing direction of the user and the x-axis is perpendicular to the y-axis and runs also through the center of the trampoline.

to Determining the data from the deformation of the jumping sheet are at least two sensors, preferably four sensors to provide, with which a precise Collection of data regarding the deformation of the jumping cloth is realized. But you can Also, more than four sensors are used, so by that even more precise Data acquisition possible is.

When special advantage should be mentioned that every movement of the user of the trampoline recorded with the computer is and in combination entering the weight of the user, the Distance between the two sensors on the x or y axis and under consideration the spring constant of the used springs, which the jump cloth to Frame connect, many for the assessment of physical fitness relevant parameters can be determined can, which make it possible in conjunction with an application software long-term statistics to create a therapy or a training course.

With following embodiment the invention should be closer explained become. The Associated Drawing shows in

1 : the schematic structure of the entire system with the involvement of the trampoline and the corresponding measuring devices,

2 a trampoline made according to the invention,

3 : the construction and arrangement of a sensor in the positions of an unloaded trampoline and a loaded trampoline,

4 : a schematic representation of the arrangement of the sensors on a round and a rectangular trampoline,

5 three load cases of a trampoline in a schematic representation,

6 : a graphic jump distribution on a jumping sheet,

7 : a diagram of the representation of the jumps / sinking depth with chronological order,

8th : a diagram of a high-resolution representation of a jump off the jumping cloth of the trampoline.

From the representations of 1 and 2 arise on the one hand, the basic structure of the overall system and on the other hand of a trampoline 1 , which is formed with the inventive features of the device for detecting movements of a person.

The trampoline 1 is like a normal trampoline 1 executed. Shown is a trampoline 1 in round construction, with the trampoline 1 may also be formed in a quadrangular shape, indicating the function of the trampoline 1 is not important.

This is how the trampoline is made 1 out of a frame 2 with associated supports and a jumping sheet 3 which about springs 5 to the frame 2 cocked and fastened.

The number of springs to be used 5 will depend on the one hand on the size of the trampoline 1 and on the other hand of the loads to be absorbed, but this is not essential for the operation of the presented invention, since the processing algorithms the construction of the trampoline 1 and the properties of the springs used 5 take into account their spring constant.

As in 2 further shown are at the trampoline 1 sensors 4 arranged, which has brackets on the frame 2 and in attachment points 10 to the jump sheet 3 are connected. Shown is the arrangement of the sensors 4 between each four springs 5 , but what, as already stated above, not essential to the process and the mode of action of the trampoline 1 is.

However, it is essential that the sensors used 4 via extendable connectors 9 For example, spiral springs or elastic bands, about the attachment points 10 to the jump sheet 3 are connected, as in the 3 shown.

In the trampoline 1 are as shown 2 four sensors 4 provided, which are arranged in pairs to each other on the x and y axis. For distinction, the sensors 4 in the drawing and in the further description as sensors S _x1 , S _x2 , S _y1 and S _y2 .

The sensors 4 are connected to microcontrollers, not shown, with which the signals of the sensors 4 converted into electrical signals and the electronic control module 6 be fed as in 1 shown.

From this representation also results that the electronic control module 6 with a computer 7 and this one with a display 8th connected or formed.

The arrangement of a sensor 4 in the form of a rotary potentiometer and the functional interaction between the sensor 4 and a loaded or unloaded jumping sheet 3 from the trampoline 1 is in principle in the 3 shown.

The upper figure illustrates the arrangement of the sensor 4 to the frame 2 of the trampoline 1 and the connection to the jump-sheet 3 a trampoline 1 , in the unloaded state of the jumping sheet 3 , while in the lower figure principle, the deflection of the sensor 4 with a loaded jumping sheet 3 is shown. With load of the jumping cloth 3 There is a deflection of the jumping cloth 3 , whereby a rotation of the sensor designed as a rotary potentiometer 4 takes place and thereby a change in the resistance of the rotary potentiometer, which ultimately leads to a measurable change in voltage, which is taken into account in the physiological and physical parameter determination.

The arrangement of the sensors used 4 on a round or quadrangular trampoline 1 is in the 4 shown. Both in the round and in the quadrangular formation of the trampoline 1 are the sensors 4 in pairs to the x or y axis to the frame 2 and the jump sheet 3 of the trampoline 1 arranged. Z is the center of the trampoline 1 marked and the direction of the arrow in the 4 gives the viewing direction of the user of the trampoline 1 at.

According to the representations, the sensors S _x1 and S _x2 are integrated on the x axes and the sensors S _y1 and S _y2 on the y axes into the overall system.

This is done in such a way that first the center of the trampoline 1 is determined and the four sensors 4 are arranged in pairs on the x and y axes. The y-axis passes through the center Z of the trampoline 1 in the direction of the user and the x-axis is perpendicular to the y-axis, also passes through the center Z of the trampoline 1 , The distances of the sensors S _x1 and S _x2 on the x-axis and the sensors S _y1 and S _y2 on the y-axis find when using the trampoline entrance into the determination of the landing point and the entry _{depth of the jump sheet} 3 , In this system also find input the spring constants of the springs 5 that the jump sheet 3 within the frame 2 The spring constants are determined by an approximation function, since these are strongly dependent on the distance of the jump point to the jump sheet 3 to the frame 2 are dependent. This is determined along a line on the frame 2 to the center of the jumping cloth 3 at several measuring points the spring constant of the trampoline 1 taking into account a standard approximate weight. From the measuring points an exponential function k = N (r) can be approximated. The input parameter is the distance from the center and the return value results from this function the value of the spring constant.

Three different load cases one trampoline 1 , as a principle representation of the jumping cloth 3 a trampoline 1 is in the 5 shown, each based on a sensor axis. The upper diagram shows the unloaded state of a jumping cloth 3 again, the frame 2 attached sensors 4 are not distracted in their position, so it can be concluded that no user on the trampoline 1 or the user is currently in a phase of flight.

The middle representation gives the load case of a centric load of the jumping cloth 3 again. Both sensors 4 measure the same deflection, from the user's sinking depth on the jump sheet 3 is determined.

The third load case shows the lower diagram, which shows that the load of the jumping cloth 3 , seen from the center, left side. Visually this is recognizable by the different deflection of the sensors 4 , The right-hand side sensor 4 is more deflected than the left side arranged sensor 4 ,

There the sensor axes are perpendicular to each other, the landing point thus be determined two-dimensionally.

The Measurement of the sinking depth and the Aufsprungpunktes takes place steady, this under a sampling frequency of preferably 30 Hz. This sampling frequency can be increased or decreased depending on the application, being an increase the sampling frequency is accompanied by a better resolution of the Aufsprungvorganges and a reduction of the sampling frequency Reduction of the data to be processed and stored pulls.

In an analogous way, the detection takes place when the jumping cloth 3 off-center, seen from the center to the right, is deflected or loaded.

The sensors 4 detect the deflections, the resulting signals are converted into analog, electrical signals. These analog signals are converted to digital and the electronic control module 6 , as in 1 shown fed. In the electronic control module 6 the processing of the supplied signals and the electronic control module takes place 6 passes the data to a data link that sends the signals to the computer 7 or transmits another data processing unit. The transmission can be carried out serially via USB, RS232 or similar standardized interfaces but also wirelessly via Bluetooth, WLAN, infrared or similar. An optical representation of the information derived from a jump and evaluated, in particular the three-dimensional deformation of the jumping cloth, on the display 8th displayed.

• – die Messung der Abstände von zwei Sensoren auf ihren x- bzw. y-Achsen,
• – Erfassung der maximalen Eindrücktiefe des Sprungtuches und der Bestimmung der daraus resultierenden maximalen Auslenkwinkel der Sensoren,
• – Festlegung der Federkonstante des Trampolins in mehreren Bereichen des Sprungtuches, jeweils vom Mittelpunkt ausgehend nach außen und die Bestimmung der Näherungsfunktion aus den gewonnenen Messpunkten, dies unter Einbeziehung eines Normgewichts, der Auslenkwinkel der einzelnen Sensoren, des Eintrittpunktes auf dem Sprungtuch, der zutreffenden Federkonstante, der Einsinktiefe des Sprungtuches je Achse und der Gesamteindrücktiefe des Sprungtuches,
• – danach erfolgt die Bestimmung der resultierenden physikalischen Größen und der Statistik.

The individual process steps that are necessary in order to detect, compare and visualize conclusions about the physiological and physical parameters of a jump on a trampoline and then draw conclusions from them are

• The measurement of the distances between two sensors on their x and y axes,
• Detecting the maximum depth of impression of the jumping cloth and the determination of the resulting maximum deflection angle of the sensors,
• Determination of the spring constant of the trampoline in several areas of the jumping cloth, in each case from the center outward and the determination of the approximation function from the measured points obtained, this including a standard weight, the deflection angle of the individual sensors, the entry point on the jump sheet, the applicable spring constant, the sinking depth of the jumping sheet per axis and the overall depth of the jumping sheet,
• - then the determination of the resulting physical quantities and the statistics takes place.

Thus, it is possible to generate a statistical distribution of the jumps from the data obtained from the x, y position and the penetration depth, as exemplified in US Pat 6 shown.

With the reference number 13 is the respective measuring point designated and from this representation can also be seen how the jumps on the jumping sheet 3 were distributed and where the focus of the jumps was.

Further optical representations in evaluation of a jump show the diagrams of the 7 and 8th , which the sinking depth with temporal consequence of their jumps and a jump from the jumping cloth 3 of the trampoline 1 document.

The 7 shows the course of the jump height in two jumps and the diagram shows the time course of the two jumps. On the ordinate, the jump height h or the sinking depth is plotted, on the abscissa the time t. It is advantageous that on the jump or on the landing phase of the user of the trampoline 1 controlled and targeted influence can be taken. The flight phase is initially estimated from the measured data. Once the user is back on the jump sheet 3 of the trampoline 1 arises, is determined from the measured flight time, the exact course of the flight phase. From the flight time, the climb time, ie the time to reach the maximum is calculated by halving the flight time. From the climb time the acceleration, the speed and the jump height can be calculated and in combination with the weight of the user the Ge weight, the bounce and the work done during the jump or jumps. In addition, the jump frequency is calculated, with the aid of which the damping of the jump is determined during the landing, which is particularly advantageous for therapeutic purposes, since it can be used to derive conclusions about the physical fitness of the user.

The diagram of 8th shows a jump recorded at 100 Hz sampling rate. Once the user has the jump sheet 3 touched, starts recording the support phase, which ends when the user of the trampoline 1 the jumping sheet 3 leaves. Thus, by means of these high-resolution visual representations and calculations, the take-off and landing phases can be controlled and optimized.

The advantages achieved with the invention are summarized in the fact that every movement of the user of the trampoline 1 can be recorded, stored and recorded, thus data is available that will influence the assessment of the physical fitness relevant parameters of the user of the trampoline 1 , in particular are the jump height, the support time, the damping, the jump frequency, the jump acceleration, the jump speed, the climb time, the flight time, the weight, the bounce, the work done, the number of jumps and other necessary statements. Additionally, the user can be on the display 8th track the plant, where and how deep he is on the jumping sheet 3 penetrates. In particular, the bounce phase or damping phase can thus be assessed and influenced. These statements allow, in conjunction with appropriate application software, long-term statistics for therapy / training courses to be created.

Claims (6)

Method for detecting movements of a person and transmitting the signals representing the movement to an electronic control module ( 6 ), where the movements are jumps made by the person on a trampoline ( 1 ) are carried out for therapeutic or sporting purposes, wherein the sinking depth and / or the point of emergence of the person by detecting the deformation of the jumping cloth ( 3 ) and wherein the deformation values provided as analog electrical signals are converted into digital signals via the electronic control module ( 6 ) to a data processing device, such as a computer ( 7 ), and the deformation of the jumping cloth ( 3 ) in three-dimensional representation on an optical device, such as a display ( 8th ), is shown. A method according to claim 1, characterized in that by the three-dimensional detection of the deformation of the jumping cloth ( 3 ) the physiological parameters of the user, such as bounce and attenuation and the physical parameters such as jump height, jump frequency, jump acceleration, jump speed, performed work, support time, time of flight, climb time, weight and other parameters, such as the number of jumps are determined. Method according to claims 1 and 2, characterized in that the transmission of the electrical signals to the electronic control module ( 6 ) and the computer ( 7 ) can be transmitted serially via standardized interfaces such as USB, RS232 or wireless, for example as Bluetooth or WLAN. Device for carrying out the method according to one of claims 1 to 3, consisting of at least two, preferably four sensors ( 4 ) on the frame ( 2 ) of a trampoline ( 1 ) and via extendable connectors ( 9 ) with the jumping sheet ( 3 ) of the trampoline ( 1 ), the sensors used ( 4 ) are arranged on two axes that pass through the center of the jumping cloth ( 3 ), wherein the sensors via an electronic control module ( 6 ) with a computer ( 7 ) and a display ( 8th ) are connected. Device according to claim 4, characterized in that the sensors ( 4 ) are designed as potentiometric sensors, angle encoders or force sensors and via the sensors ( 4 ) the angular discrimination caused by the deformation of the jumping cloth ( 3 ), and the extendable connectors ( 9 ) are preferably formed as coil springs or as elastic bands. Device according to claims 4 or 5, characterized in that the sensors ( 4 ) are equipped with integrated microcontrollers.