CN100493654C - Discus used for testing athlete kinetics information - Google Patents

Abstract

The present invention discloses one kind of discus capable of sensing force. The discus has one hollow discus body comprising one upper casing, one lower casing and one metal ring connecting the upper casing and the lower casing, one circuit board fixed inside the lower casing, one E-type diaphragm connected to the circuit board, weight blocks, and battery. The discus can acquire and quantize the stress data before and during the flying of the discus to reflect the effectiveness of the player' s action, and this makes it possible to raise the throwing technology and the sports level of the player.

Description

A kind of discus that is used for the test of sportsman's dynamic information

Technical field

The present invention relates to a kind of sports equipment, particularly a kind of discus that is used for the test of sportsman's dynamic information can obtain the sextuple force information of the discus throw person in the throwing process in real time, is used for training guidance.

Background technology

Along with improving constantly of sports competitiveness, also growing to the demand of the equipment performance of physical culture auxiliary training equipment and kind.The auxiliary training equipment of science can provide technical guarantee for athletic training, scientific research and teaching, helps coach, researcher and sportsman to be familiar with the inherent law of sports, optimizes training method, improves sports achievement.At present, what the kinematics parameters of the type games of measurement throwing both at home and abroad generally adopted is motion capture system, and this method obtains the human motion mathematic(al) parameter by the change in location of measuring tracker then indirectly at need sites measured glue chasing device.Location-based measurement can not reflect the variation of power usually well, and for throwing type games, if can obtain the power that directly acts on the apparatus then the reasonability of judgement player motion that can science.For the discus throw, sell initial velocity, angle of trajectory and selling of discus thrower's achievement and discus highly is closely related.The length theoretical formula of discus throw is $S=\frac{V_0^2\mathrm{<figure-callout\; id="2"\; label="sin"\; filenames="C200710062199E00071.png"\; state="\{\{state\}\}">sin</figure-callout>}2\mathrm{\&alpha;}}{g}+\sqrt{\frac{2h}{g}}{V}_0\cos \mathrm{\&alpha;}$ (S is for throwing length, V ₀Be the discus initial velocity of selling, α is an angle of trajectory, and h is the height of selling); Because discus is subjected to the active force of air in-flight, actual length is also relevant with wind direction with aerial wind speed size.And the parameter of these decision discus length is all relevant with kinematics parameters in the discus throwing process, and the kinematics parameters in the motion process all is the result of throwing power effect.If can be with the complete quantization means of force-bearing situation of discus in each period when airflight (before selling and), particularly the stressed and athletic action in the throwing process is associated, the validity that then can effectively reflect player motion, in time correct disproportionate movement, improve training effectiveness, also can gather simultaneously elite's the feature of having an effect, form the outstanding cake action database of throwing with research and reference value.By retrieval, there is not to find to be used for pertinent literatures such as the discus report of sportsman's dynamic information test in the prior art.

Summary of the invention

The purpose of this invention is to provide a kind of discus of the sportsman's of being used for dynamic information test, realized the three-dimensional line acceleration of discus and obtaining of three dimensional angular acceleration information.

Technical scheme of the present invention is: a kind of discus of the sportsman's of being used for dynamic information test, comprise upper shell in its structure, lower house, upper shell, lower house links into an integrated entity with connector by quoit and constitutes the cake body, a cavity is arranged between upper shell and the lower house, there is a groove at the inboard center of lower house, in the groove upper fixed circuit board is arranged, has the data acquisition and processing (DAP) circuit on the circuit board, the E type diaphragm that is connected with circuit board is housed in the groove of circuit board center downside, direction and position specific on the E type diaphragm mount resistance strain gage, E type diaphragm and circuit board are fixed together, and E shape diaphragm can obtain X, Y, angular acceleration on the linear acceleration of three directions of Z and three directions.Below E type diaphragm, be fixed with mass.In the outside of circuit board, be positioned on the inboard table top of lower house and be installed with the battery folder that is used for fixing battery, for guaranteeing that center of gravity is consistent with the standard discus, at the offside of battery folder, the inboard table top that is positioned at lower house tightens intrinsic balancing weight.Lateral surface at the cake body has output interface and button, and there is the protection film output interface and button outside, covers the back and forms one with the discus surface.

The described discus that is used for the test of sportsman's dynamic information, circuit board are circular, and its center of circle overlaps with the lower house center of circle.

The described discus that is used for the test of sportsman's dynamic information, upper shell, lower house link into an integrated entity with hex nut, Cross Recess Head Screw by quoit.

The described discus that is used for the test of sportsman's dynamic information, its characteristics are to have and consistent appearance and size and the weight of International Track and Field Association (IAAF) required standard, and upper and lower casing all adopts engineering plastics to be made.

This discus operation principle that is used for the test of sportsman's dynamic information is such: when testing, the sportsman holds discus, put in advance by regular event, the rotation and the discus of throwing out, when the speed of discus changes, mass is subjected to displacement with respect to discus owing to being subjected to effect of inertia, thereby cause E shape diaphragm deformation, the resistance strain gage resistance value that is mounted on the E shape diaphragm changes thereupon, thereby cause the variation of voltage, amplify through measuring circuit again, filtering, with A/D analog-digital converter conversion etc., handle by SCM system at last and be stored among the nonvolatile memory Flash with certain format, and send to host computer by the USB transmission line, obtain the linear acceleration and the angular acceleration of discus, and then obtain the active force of sportsman, carry out dynamic analysis discus.

In the present invention, mass and E type diaphragm are immersed in the oil fully, can reduce concussion, increase system damping; E type diaphragm is sealed in by circuit board in the groove at the inboard center of lower house, when increasing damping, also makes E type diaphragm bridge circuit export as close as possible signal processing circuit, reduces the decay of signal.

Its method of testing of discus of the sportsman's of being used for dynamic information of the present invention test may further comprise the steps: whether (1) system checks voluntarily and operate as normal to provide condition indicative signal; (2) accept thrower's instruction, begin to gather; (3) finish collection after, link to each other with computer by output interface, the data that collect are sent to computer.

The beneficial effect that the present invention obtains is:

This discus is easy to process, be convenient to I﹠ M; Use built-in acceleration transducer, the inside inertial mass by sensor causes force sensing resistance deformation, produces signal of telecommunication output, is not need outsidely to produce deformation and can effectively measure the influence when having avoided external deformation excessive with the difference of power sensor; Data store is divided employing outage nonvolatile memory, but powered-down behind the in-site measurement to reduce system energy consumption, extends working time; Battery terminal also leads to external interface, and can not dismantle battery can be to power source charges; Inertial mass and elastomer are immersed in the oil fully, and circuit board is sealed in the sensor outer housing, have reduced system's concussion, have increased system damping, though the discus system frequently shake and situation about being hit under also can keep certainty of measurement.

Description of drawings

Fig. 1 is vertical section structure figure of the present invention.

Fig. 2 is a upward view of the present invention.

Fig. 3 is the treatment circuit hardware elementary diagram.

The implication of each label representative is as follows among the figure:

1, quoit 2, upper shell 3, battery folder 4, circuit board 5, Cross Recess Head Screw 6, balancing weight 7, hex nut 8, Cross Recess Head Screw 9, lower house 10, mass 11, E shape diaphragm 12, Cross Recess Head Screw 13, triggering button 14, power switch 15, power supply indicator 16, USB interface.

The specific embodiment

Following examples are used to illustrate the present invention.

The specific embodiment that provides as Fig. 1, a kind of discus that is used for the test of sportsman's dynamic information, comprise upper shell 2, lower house 9 in the structure, upper shell 2, lower house 9 usefulness engineering plastics make, thirty word slotted disk head screw 8 and three hex nuts 7 are with 120 ° the angular distribution edge at upper shell 2, upper shell 2, lower house 9 are fastened on the both sides of quoit 1, and a little less than the plane of upper shell 2, lower house 9 appearances.Upper shell 2, lower house 9 and quoit 1 constitute the cake body of digitlization discus.Form a cavity between upper shell 2 and lower house 9, there is a groove at lower house 9 inboard centers, in the groove upper fixed circular circuit board 4 are arranged, and its center of circle overlaps with lower house 9 centers of circle, are fastenedly connected by four Cross Recess Head Screws 5 and lower house 9 table tops.The E type diaphragm 11 that is connected with circuit board 4 is housed in the groove of circuit board 4 center downsides, below E type diaphragm 11, is fixed with mass 10.In the outside of circuit board 4, be positioned on the inboard table top of lower house 9 by four Cross Recess Head Screws, the 12 fastening battery folder 3 that are used to install battery that are equipped with.The offside of battery folder 3 is positioned on the inboard table top of lower house 9 and is fastened with balancing weight 6 by Cross Recess Head Screw.Balancing weight 6 is symmetrical with respect to lower house 9 centers of circle with battery folder 3.See Fig. 2, triggering button 13, power switch 14, power supply indicator 15, usb 16 are distributed in lower house 9 outer surfaces, and are lower than lower house 9 appearance planes.There is the protection film usb 16 and triggering button 13 outsides, cover back and discus surface formation one.This discus is consistent with the appearance and size and the weight of International Track and Field Association (IAAF) regulation.The system works flow process is referring to Fig. 3, specific as follows: after the system power supply switch opens, single-chip microcomputer is initialization ancillary equipment at first, in case if system works is normally then begin to wait for the data transfer command that triggering collection switch or receiving computer send. receive data acquisition or transmission command, processor is then controlled the acceleration signal of ADC pick-up transducers bridge circuit output, then the data of gathering are saved in memory by general input and output pin. when needs read data, directly discus is connected on the computer by the USB connecting line, the data that the computer control single-chip microcomputer will be kept in the memory are transferred in the computer by USB interface.

Claims (4)

1; a kind of discus that is used for the test of sportsman's dynamic information; comprise upper shell and lower house; it is characterized in that upper shell (2); lower house (9) links into an integrated entity with connector by quoit (1); between upper shell (2) and lower house (9), a cavity is arranged; there is a groove at the inboard center of lower house (9); in the groove upper fixed circuit board (4) is arranged; circuit board has the data acquisition and processing (DAP) circuit on (4); in the groove of circuit board (4) center downside the E pattern sheet (11) that is connected with circuit board (4) is housed; be pasted with resistance strain gage on the E type diaphragm (11); be fixed with mass (10) in E pattern sheet (11) below; the outside in circuit board (4); be fixed with battery folder (3) on the inboard table top of lower house (9); the symmetrical side of battery folder (3); the inboard table top of lower house (9) tightens intrinsic balancing weight (6); button (14) and the output interface (16) that is lower than lower house (9) appearance plane arranged at lower house (9) outer surface; there is the protection film button (14) and output interface (16) outside, cover the back and form one with the discus surface.

2, by the described discus that is used for the test of sportsman's dynamic information of claim 1, it is characterized in that circuit board (4) for circular, its center of circle overlaps with lower house (9) center of circle.

3, by the described discus that is used for the test of sportsman's dynamic information of claim 1, it is characterized in that upper shell (2) and lower house (9) link into an integrated entity with hex nut (7), Cross Recess Head Screw (8) by quoit (1).

4, by the described discus that is used for the test of sportsman's dynamic information of claim 1, it is characterized in that having and consistent appearance and size and the weight of International Track and Field Association's required standard.

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