CN113554913A - On-ice item wind resistance testing and simulation training system utilizing wind tunnel - Google Patents
On-ice item wind resistance testing and simulation training system utilizing wind tunnel Download PDFInfo
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- CN113554913A CN113554913A CN202110834407.4A CN202110834407A CN113554913A CN 113554913 A CN113554913 A CN 113554913A CN 202110834407 A CN202110834407 A CN 202110834407A CN 113554913 A CN113554913 A CN 113554913A
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000012549 training Methods 0.000 title claims abstract description 30
- 238000004088 simulation Methods 0.000 title claims abstract description 16
- 238000012806 monitoring device Methods 0.000 claims abstract description 22
- 230000036544 posture Effects 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 12
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- 238000000034 method Methods 0.000 abstract description 9
- 238000005728 strengthening Methods 0.000 abstract description 7
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- G09B9/00—Simulators for teaching or training purposes
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M9/02—Wind tunnels
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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Abstract
The invention provides a wind resistance testing and simulation training system for an ice project by utilizing a wind tunnel. The method comprises the following steps: the wind tunnel, the force measuring balance, the camera monitoring device, the information real-time display device and the auxiliary supporting device. The force measuring balance is fixedly arranged on a bottom plate of the wind tunnel, the auxiliary supporting device is fixedly arranged on the force measuring balance and connected with a user, the camera monitoring device is fixedly arranged on the inner wall of the wind tunnel in a multi-machine position mode and shoots the user at multiple angles in real time, and an information picture of the information real-time display device is positioned on the bottom surface of the wind tunnel right in front of the user. The camera monitoring device records real-time motion video of a user, the force measuring balance measures wind resistance data received by the user, and wind speed data, monitoring picture data and action instruction information are integrated into a picture of the information real-time display device. The system of the invention helps coaches and athletes to perform posture optimization and strengthening training of key technical actions by using quantified wind resistance, and helps technicians to research and develop high-performance sports equipment.
Description
Technical Field
The invention relates to the technical field of on-ice project simulation training, in particular to an on-ice project wind resistance testing and simulation training system utilizing a wind tunnel.
Background
In the process of the movement of the ice-on-ice item (speed skating and short-track speed skating), the wind resistance caused by the movement speed is the highest resistance, and the influence on the game performance is great. The magnitude of the wind resistance is closely related to the sports posture and sports equipment of the athlete.
According to the principle of relative motion, the motion speed of the on-ice project can be simulated by utilizing the wind speed in the wind tunnel, and attitude wind resistance optimization, equipment wind resistance optimization and strengthening training are facilitated under the environment.
The wind resistance simulation method of the ice project in the prior art has the following defects: the wind resistance of an ice project athlete can not be accurately measured in an actual field, and the wind resistance can be reversely pushed only according to an ideal model, so that the error is large;
the posture of the key technical movement of the athlete can not be optimized through the quantitative data displayed in real time, the posture adjustment of the athlete is mostly carried out by depending on experience, the effect is not good enough, and the wind resistance performance of the sports equipment can not be evaluated quickly and accurately.
The research and development of sports equipment are mostly based on mannequin model tests, and the real wind resistance performance of athletes in the process of sports cannot be evaluated.
Disclosure of Invention
The embodiment of the invention provides a wind resistance testing and simulation training system for an on-ice project by utilizing a wind tunnel, which aims to overcome the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme.
A wind resistance testing and simulation training system for an on-ice item using a wind tunnel, comprising: the system comprises a wind tunnel, a force measuring balance, a camera monitoring device, an information real-time display device and an auxiliary supporting device;
the device comprises a force measuring balance, an auxiliary supporting device, a camera monitoring device, an information real-time display device and a camera monitoring device, wherein the force measuring balance is fixedly arranged on a bottom plate of the wind tunnel;
the wind tunnel generates wind speed with adjustable size and blows to the direction of a user, the auxiliary supporting device assists in adjusting the posture of the user and keeps the stable action of the user under different wind speeds and postures; the camera monitoring device records real-time motion video of a user, the force measuring balance measures wind resistance data received by the user and transmits the wind resistance data to the information real-time display device, and an information picture of the information real-time display device displays wind speed of a wind tunnel, the wind resistance data received by the user, posture state information of the user and a motion posture control command for the user in real time.
Preferably, the length, width and height of the test section of the wind tunnel are not less than 4m, 3m and 2m, a transparent observation window is arranged on the side wall of the wind tunnel, and the relative wind speed of the wind tunnel is controlled to be 12-18 m/s.
Preferably, the horizontal measuring range of the force measuring balance is not less than 100N, and the height of the force measuring balance is flush with the ground of the wind tunnel test section.
Preferably, the auxiliary supporting device comprises a high-strength rubber pad, a bottom plate, a bonding layer, a cover plate, a limiting block, a positioning pin, a positioning hole and a seat, the high-strength rubber gasket is connected with the bottom plate, the bottom plate is connected with the shroud plate through a bonding layer, the bonding layer connects the bottom plate and the shroud plate into a whole, the upper surface of the shroud plate is provided with a plurality of rows of positioning holes and bolt holes, the bolt holes respectively correspond to A-type bolt holes and B-type bolt holes and bolts, the A-type bolts are connected with the shroud plate, the bottom plate and the high-strength rubber pad, and is fixedly connected with a balance force measuring device, the B-shaped bolt is connected with the shroud plate and the seat, the positioning hole is penetrated and connected with the shroud plate and the limiting block by the positioning pin, the limiting block is provided with a square connecting key, the square connecting key is matched with the square groove position clamp at the positioning hole on the surface of the covering plate.
Preferably, the high-strength rubber pad is cylindrical, the center of the cross section of the high-strength rubber pad penetrates through the A-shaped bolt hole, the bottom surface of the high-strength rubber pad is tightly attached to the surface of the force measuring balance, and the top surface of the high-strength rubber pad is connected with the bottom plate;
the upper surface and the lower surface of the bottom plate are square, 8A-type bolt hole sites and 8B-type bolt hole sites are arranged on the surface of the square corresponding to the surface of the shroud plate;
the upper surface of the shroud plate is provided with 24 rows of positioning holes, 8A-type bolt hole positions and 8B-type bolt hole positions, the 24 rows of positioning holes are arranged on one side of the longitudinal axis of the shroud plate in sequence along the longitudinal axis, each row is provided with two positioning holes, and the 8A-type bolt hole positions and the 8B-type bolt hole positions are respectively and symmetrically arranged relative to the longitudinal axis and the transverse axis of the shroud plate.
Preferably, the center distance between every two rows of the positioning holes of the 24 rows of positioning holes is 50mm, the center distance between every two positioning holes in each row is 170mm, the center distance between the positioning holes in one row close to the long edge of the shroud plate is 190mm from the long edge, the center distance between the positioning holes in one row close to the short axis of the shroud plate is 150mm from the short axis, and the diameter of each positioning hole is 10 mm.
Preferably, the 8 a-type bolt hole sites are symmetrical about a longitudinal axis and a transverse axis of the shroud plate, the central distances of the symmetrical hole sites on two sides in the longitudinal axis direction are 240mm, 560mm and 240mm respectively, the central distances of the symmetrical hole sites on two sides in the transverse axis direction are 240mm, 560mm and 240mm respectively, the 8B-type bolt hole sites are symmetrical about the longitudinal axis and the transverse axis of the shroud plate, the central distance of the symmetrical hole sites on two sides in the transverse axis direction is 80mm, the central distances of the symmetrical hole sites on two sides in the longitudinal axis direction are 240mm and 400mm respectively, the diameter of the a-type bolt hole is 11mm, and the diameter of the B-type bolt hole is 11 mm.
Preferably, circular grooves are formed around the 8A-shaped bolt hole positions corresponding to the upper surface of the shroud plate, the diameter of each circular groove is the same as that of a nut of the A-shaped bolt, the depth of each circular groove is the same as that of the nut of the A-shaped bolt, and the circular grooves are matched with the nut clamping positions of the A-shaped bolts;
the covering plate is connected with the limiting block through the positioning pin, square connecting keys are arranged at two ends of the limiting block, positioning holes are formed in the end part of the limiting block corresponding to the positions of the square connecting keys, and the positioning pin penetrates through the square connecting keys and the positioning holes in the covering plate to connect the limiting block and the covering plate into a whole;
the apron upper surface corresponds be provided with square groove around the locating hole, square groove with square connection key screens coincide, the stopper plays spacing fixed effect to foot ski, through changing the position of stopper realizes that the sportsman tests with different motion postures.
Preferably, the cover plate is connected with the seat through the B-type bolt, and the seat supports athletes and keeps a certain movement posture for testing;
the seat comprises a base plate, a telescopic rod, a seat cushion and fan-shaped angle iron, wherein the base plate and the telescopic rod are connected into a whole by welding, the fan-shaped angle iron is connected with the base plate and the telescopic rod, and the telescopic rod is connected with the seat cushion;
the surface of bed plate sets up two rows B type bolt hole, every row has two hole sites, on the bed plate surface B type bolt hole with B type bolt hole on the shroud plate corresponds, the bed plate is connected through the welded mode the telescopic link, telescopic link one side sets up fan-shaped angle bar, and this fan-shaped angle bar is connected the bed plate.
Preferably, the telescopic rod comprises a fixed rod, a sliding rod and a buckle, the inner sleeve of the sliding rod is tightly attached to the inside of the fixed rod, and the buckle fixes the sliding rod at a certain height position of the fixed rod and stops sliding;
the seatpad adopts the rubber material to make, the centre of seatpad sets up a rotation axis, the rotation axis will the seatpad falls into two parts, two parts seatpad winds the rotation axis is upset from top to bottom, two parts seatpad middle part respectively sets up the trompil that the size is moderate, two parts seatpad tip sets up spacing buckle, works as when two parts seatpad upset is merged downwards, spacing buckle is fixed two parts seatpad is whole, this moment the seatpad is transformed into the handrail.
According to the technical scheme provided by the embodiment of the invention, the wind resistance testing and simulation training system for the ice project utilizing the wind tunnel is provided, so that the posture optimization and the strengthening training of key technical actions of a coach and an athlete are assisted by using the quantified wind resistance, and the research and development of high-performance sports equipment are assisted by technicians.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of a wind resistance testing and simulation training system for an ice-based project using a wind tunnel according to an embodiment of the present invention;
FIG. 2 is a partial block diagram of an on-ice project wind resistance testing and simulation training system using wind tunnels according to an embodiment of the present invention;
FIG. 3 is an overall view of a high-strength rubber mat, a bottom plate, and a cover plate according to an embodiment of the present invention;
FIG. 4 is a front view of an integrated high-strength rubber mat, bottom plate, and cover plate according to an embodiment of the present invention;
FIG. 5 is a top view of a shroud provided in accordance with an embodiment of the present invention;
FIG. 6 is a top view of a base plate according to an embodiment of the present invention;
fig. 7 is a schematic view of a high-strength rubber pad according to an embodiment of the present invention;
FIG. 8 is a diagram of a stop block according to an embodiment of the present invention;
FIG. 9 is a side view of a seat provided by an embodiment of the present invention;
figure 10 is a diagram of a base plate according to an embodiment of the present invention,
FIG. 11 is a diagram illustrating a seat cushion and armrest according to an embodiment of the present invention
FIG. 12 is a pin diagram of a pin assembly according to an embodiment of the present invention
Fig. 13 is a bolt diagram according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The invention provides a wind resistance testing and simulation training system for an ice project by utilizing a wind tunnel, which simulates the motion state of the ice project by utilizing the wind speed in the wind tunnel according to the relative motion principle and carries out attitude wind resistance optimization, equipment wind resistance optimization and strengthening training in the environment.
An application scenario schematic diagram of the system for testing and simulating wind resistance of an ice project by using a wind tunnel according to an embodiment of the present invention is shown in fig. 1, and a partial structure diagram is shown in fig. 2. The system comprises a wind tunnel, a force measuring balance, a camera monitoring device, an information real-time display device, an auxiliary supporting device and an athlete, which jointly form a testing system and work cooperatively.
The device comprises a force measuring balance, an auxiliary supporting device, a camera monitoring device, an information real-time display device and a user, wherein the force measuring balance is fixedly arranged on a bottom plate of the wind tunnel, the auxiliary supporting device is fixedly arranged on the force measuring balance and is connected with the user, the camera monitoring device is fixedly arranged on the inner wall of the wind tunnel in a multi-angle real-time mode to shoot the user, and an information picture of the information real-time display device is located on the bottom surface of the wind tunnel in front of the user.
The wind tunnel generates wind speed with adjustable size and blows to the direction of a user, the auxiliary supporting device adjusts the posture of the user and keeps the stable action of the user at different wind speeds and different postures; the camera monitoring device records real-time motion video of a user, the force measuring balance measures wind resistance data received by the user, and the wind resistance data are transmitted to the camera monitoring device.
The technical requirements for the matching use of the components are as follows:
1. wind tunnel: the wind tunnel test section of the wind resistance test training system is not smaller than 2 meters in size height, not smaller than 3 meters in width and not smaller than 4 meters in length, so that the training test of a single on-ice project is met, and the training requirement of a multi-person team is met. Controlling the relative wind speed of the wind tunnel to be 12-18m/s (shown in figure 1) by referring to the sliding speed of the ice project competition;
2. a force measuring balance: the horizontal range is not less than 100N, the precision is not less than 1N, and the height of the balance is flush with the ground of the wind tunnel test section (as shown in figure 2);
3. the camera monitoring device: set up two monitoring devices that make a video recording, the monitoring device that makes a video recording sets up directly over the front and side directly over the sportsman respectively, and the monitoring device that makes a video recording can in time take notes the action of the sportsman's action of kicking ice and swing arm under different wind speeds to transmit and give information real-time display device, be convenient for observe in real time and optimize each technical action, still can conveniently look up video data repeatedly.
4. Information real-time display device: the real-time information display device is arranged on the ground right in front of the athlete testing position, can display information such as wind speed of a wind tunnel, resistance borne by a tested athlete, posture states of the athlete, motion posture control commands of a user and the like in real time, can be directly displayed and presented through electronic equipment, and can also be used for throwing the information into the real-time information display area through arranging a projector at the top of the wind tunnel, so that the athlete can clearly see action instructions in a projection picture. If the projection picture is to be improved to be clear, a material with good imaging effect can be paved and adhered in the projection area for auxiliary imaging.
On the whole, the wind tunnel can generate stable and adjustable wind speed, a stable and uniform flow field can be formed inside the wind tunnel and blows to the direction of the athlete, and the athlete can keep stable actions under different postures by virtue of the auxiliary supporting device; a live video for training and testing is rebroadcast and recorded by using the camera monitoring device, and a technical action instruction is issued to the athlete at any time through a picture in the information real-time display device; finally, the wind resistance of the athlete fixed on the device is stably transmitted to the force measuring balance in real time through the device of the embodiment of the invention, and resistance data are acquired.
5. Auxiliary supporting device: the high-strength rubber cushion comprises a high-strength rubber cushion 1, a bottom plate 2, a bonding layer 3, a covering plate 4, a limiting block 5, a positioning pin 6, a positioning hole 7 and a seat 8, wherein fig. 3 is a sample diagram of an integral entity composed of the high-strength rubber cushion, the bottom plate and the covering plate, fig. 4 is a front view of the integral composed of the high-strength rubber cushion, the bottom plate and the covering plate, fig. 5 is a top view of the covering plate, fig. 6 is a top view of the bottom plate, fig. 7 is a schematic diagram of the high-strength rubber cushion, fig. 8 is a schematic diagram of the limiting block, fig. 9 is a side view of the seat, fig. 10 is a diagram of a base plate, fig. 11 is a diagram of a seat cushion and an armrest transition diagram, and fig. 12 is a positioning pin diagram.
The testing system is connected with a high-strength rubber pad 1, the high-strength rubber pad 1 is connected with the bottom plate 2, the bottom plate 2 is connected with the shroud plate 4 through a bonding layer 3, the bonding layer 3 integrally connects the base plate 2 and the shroud plate 4 (as shown in fig. 3 and 4), the upper surface of the shroud plate 4 is provided with a plurality of rows of positioning holes 7 and bolt holes, the bolt holes respectively correspond to a type A bolt hole and a type B bolt hole, and bolts (shown in figures 5 and 13), the type A bolt is connected with the shroud plate 4, the bottom plate 2 and the high-strength rubber pad 1, and is fixedly connected with a balance force measuring device, the B-shaped bolt is connected with the shroud plate 4 and the seat 8, the positioning hole 7 is penetrated and connected with the shroud plate 4 and the limiting block 5 by the positioning pin 6, the limiting block 5 is provided with a square connecting key (as shown in figure 8), the square connecting keys are matched with the square grooves on the positioning holes 7 on the surface of the covering plate 4 in a clamping mode.
Specifically, the high-strength rubber pad 1 is made of a high-strength rubber material, the body shape is cylindrical, the height is 30mm, the diameter of the cross section is 30mm, the center position of the cross section penetrates through an A-shaped bolt hole (shown in figure 7) with the diameter of 11mm, the bottom surface of the high-strength rubber pad 1 is tightly attached to the surface of the force measuring balance, and the top surface of the high-strength rubber pad is connected with the bottom plate 2. The high-strength rubber pad 1 is smooth and elastic in surface, is beneficial to preventing scratches from damaging the force measuring balance, has enough rigidity and strength, can bear the weight of the upper part, and avoids overlarge deformation.
Specifically, the bottom plate 2 is made of wood, the length of the bottom plate is 700mm, the width of the bottom plate is 700mm, the thickness of the bottom plate is 5mm, the upper surface and the lower surface of the bottom plate are square, the surfaces of the bottom plate and the bottom plate are polished, 8 a-type bolt hole positions and 8B-type bolt hole positions are arranged on the square surface of the bottom plate 2 corresponding to the surface of the cover plate 4 (as shown in fig. 6). The arrangement of the base plate 2 prevents the high-strength rubber gasket 1 from directly contacting with the shroud plate 4 to play a role in buffer protection, the base plate 2 has a certain thickness, so that the shroud plate 4 is lifted, the ground clearance is increased, and meanwhile, the base plate 2 has certain rigidity and strength and is connected with the shroud plate 4 into a whole, so that the integral rigidity and strength are improved.
Specifically, the sheathing board 4 is made of wood, the surface of the sheathing board is polished, the long side of the sheathing board is 1500mm, the short side of the sheathing board is 1200mm, the thickness of the sheathing board is 18mm, a layer of varnish is coated on the upper surface of the sheathing board 4, clear marking marks are conveniently formed on the surface of the sheathing board, 24 rows of positioning holes 7, 8A-type bolt hole positions and 8B-type bolt hole positions are formed in the upper surface of the sheathing board 4, the 24 rows of positioning holes 7 are formed in one side of the longitudinal axis of the sheathing board 4 and are sequentially arranged along the longitudinal axis, each row is provided with two positioning holes 7, and the 8A-type bolt hole positions and the 8B-type bolt hole positions are respectively and symmetrically arranged relative to the longitudinal axis and the transverse axis of the sheathing board 4 (as shown in fig. 5). The sheathing 4 has sufficient rigidity and strength to ensure that no damage or excessive deformation occurs.
Specifically, the 24 rows of positioning holes 7 are provided, the center distance between every two rows of positioning holes 7 is 50mm, the center distance between every two positioning holes 7 in each row is 170mm, the center distance between the centers of a row of positioning holes 7 close to the long edge of the shroud plate 4 and the long edge is 190mm, the center distance between the centers of a row of positioning holes 7 close to the short axis of the shroud plate 4 and the short axis is 150mm, the diameter of the positioning holes 7 is 10mm, the 8 a-type bolt hole sites are symmetrical with respect to the longitudinal axis of the shroud plate 4 and the transverse axis, the center distances between the symmetrical hole sites on both sides in the longitudinal axis direction are 240mm, 560mm and 240mm, the center distances between the symmetrical hole sites on both sides in the transverse axis direction are 80mm, the center distance of the symmetrical hole sites on two sides along the longitudinal axis direction is 240mm and 400mm respectively, the diameter of the A-type bolt hole is 11mm, and the diameter of the B-type bolt hole is 11mm (as shown in figure 5).
Specifically, circular grooves (as shown in fig. 5) are arranged around the 8 a-type bolt hole positions corresponding to the upper surface of the shroud plate 4, the diameter of each circular groove is the same as the diameter of a nut of the a-type bolt, and the depth of each circular groove is the same as the thickness of the nut of the a-type bolt. The circular groove is matched with the nut clamping position of the A-type bolt, the A-type bolt is ensured to be screwed down, the upper surface of the nut of the A-type bolt is flush with the upper surface of the covering plate 4, and therefore the smooth and smooth upper surface of the covering plate 4 is ensured to be whole.
Specifically, the sheathing 4 passes through locating pin 6 is connected stopper 5 (as shown in fig. 8), stopper 5 adopts the timber material to make, and the surface is smooth, has sufficient rigidity, intensity, and length is 200mm, and the width is 40mm, and mid portion thickness is 30mm stopper 5 both ends set up square connection key, the long limit size of square connection key is 40mm, and the minor face size is 30mm, and thickness is 9mm, square connection key position corresponds the stopper tip is provided with locating hole 7, locating pin 6 runs through square connection key with on the sheathing 4 locating hole 7, will stopper 5 the sheathing 4 connect into whole. Square grooves are formed around the 24 rows of positioning holes 7 corresponding to the upper surface of the shroud plate 4 and are matched with the square connecting key in clamping mode, the size of the long side of each square groove is 40mm, the size of the short side of each square groove is 30mm, and the depth of each square groove is 9mm as same as the thickness of each square connecting key. Stopper 5 plays spacing fixed effect to foot ski, through changing stopper 5's position can realize that the sportsman tests with the motion posture of difference, also can satisfy the demand that different sportsman carried out the windage test simultaneously.
Specifically, the cover plate 4 is connected with the seat 8 through the B-type bolt, and the seat 8 can support an athlete to keep a certain movement posture for a long time to perform a test (as shown in fig. 1 and 2).
Specifically, the seat 8 includes a base plate 81, a telescopic rod 82, a seat cushion 83 and a fan-shaped angle iron 84, the base plate 81 and the telescopic rod 82 are connected into a whole by welding, meanwhile, the fan-shaped angle iron 84 connects the base plate 81 and the telescopic rod 82, so that the connection is more stable and reliable, and the telescopic rod 82 is connected with the seat cushion 83 (as shown in fig. 9).
Specifically, the bed plate 81 adopts the steel material to make, and length is 160mm, and the width is 100mm, and thickness is 7mm, the bed plate 81 surface sets up two rows B type bolt hole, every row has two hole sites, one row of center distance before the B type bolt hole the bed plate 81 minor face edge is 20mm, and the distance is long limit edge 10mm, the bed plate 81 is surperficial B type bolt hole with B type bolt hole on the shroud plate 4 corresponds just, the bed plate 81 is connected through the welded mode telescopic link 82, telescopic link 82 one side sets up fan-shaped angle bar 84 and connects the bed plate 81 (show as figure 9, 10).
Specifically, fan-shaped angle bar 84 adopts the steel material to make, and the radius is 50mm, and thickness is 2mm, connects bed plate 81, telescopic link 82, strengthens the fastness that both connect, improves the stability of whole seat (as shown in fig. 9).
Specifically, the telescopic rod 82 includes a fixed rod 821, a sliding rod 822 and a buckle 823, wherein an inner sleeve of the sliding rod 822 is tightly attached to the inside of the fixed rod 821, and the buckle 823 fixes the sliding rod 822 at a certain height position of the fixed rod 821 to stop sliding. The maximum size of the telescopic rod 82 can reach 1200mm, the minimum size is 60mm, the telescopic rod 82 has sufficient rigidity and strength, the fixed rod 821 and the sliding rod 822 are cylindrical hollow rods made of steel, and the top end of the telescopic rod 82 is connected with the seat cushion 83 (as shown in fig. 9).
Specifically, seatpad 83 adopts the rubber material to make, and the shape is approximate triangle-shaped, and the surface is undulant to some extent, set up a rotation axis 831 in the middle of the seatpad 83, rotation axis 831 will seatpad 83 falls into two parts, two parts seatpad can wind rotation axis 831 upset from top to bottom, two parts seatpad middle part respectively sets up the trompil that the size is moderate, two parts seatpad tip sets up spacing buckle 832, works as when two parts seatpad upset is merged downwards, spacing buckle can fix 832 two parts seatpad is whole, this moment seatpad 83 is transformed into the handrail, works as when seatpad 83 uses as the handrail, the trompil is favorable to better gripping handrail, avoids the slippage of hand (as shown in fig. 11).
In particular, the seat cushion 83 may be converted into the armrest, which may be placed on the side of the athlete to provide effective support assistance for the athlete in maintaining a certain movement posture, thereby achieving a multi-functional use of the seat 8.
Specifically, locating pin 6 adopts the steel material to make (as shown in fig. 12), and the diameter is 10mm, and length is 50mm, and the surface is smooth, and intensity, rigidity are great, can with stopper 5 with shroud 4 is connected and is fixed into whole, guarantees foot skating device's stability, A type bolt adopts the steel material to make, and the screw rod diameter is 11mm, and length is 55mm, and the screw rod surface is threaded, and the nut diameter is 18mm, and thickness is 2mm, B type bolt adopts the steel material to make, and the screw rod surface is threaded, and the screw rod diameter is 9mm, and length is 30mm, and the nut diameter is 18mm, and thickness is 5mm (as shown in fig. 13).
In the above-mentioned structure of the wind resistance testing and simulation training system for the ice-on-ice project using the wind tunnel, the size, material, configuration and the like of each component can be replaced and modified according to specific requirements. The wind resistance testing and simulation training system for the ice project utilizing the wind tunnel can be applied to wind resistance training tests of ice projects such as speed skating, short-path speed skating and the like.
The using process of the system for testing the wind resistance of the ice project and simulating the training by using the wind tunnel provided by the embodiment of the invention comprises the following steps:
1. before testing, the athlete firstly fixes the auxiliary supporting device on the force measuring balance. The athlete can stabilize the foot skating device by the limiting block, so that a certain action posture can be kept.
2. The wind tunnel can generate stable and adjustable wind speed, and a stable and uniform flow field can be formed inside the wind tunnel and blown to the direction of the athlete; controlling the wind tunnel to adjust the wind speed, wherein the variation range of the wind speed is 12-18 m/s.
3. The athlete needs to keep a motion posture for 30 seconds at each wind speed, and the auxiliary supporting device can keep a certain motion posture, so that the relative stability of a wind resistance test result is ensured. The foot skating device is stabilized by adjusting the limiting block, so that different postures can be changed and the action is kept stable;
4. the camera monitoring device is used for broadcasting and recording live videos of training and testing of the athlete, technical action instructions are issued to the athlete at any time through pictures in the information real-time display device, the athlete is informed of changing the motion posture, and the next group of tests are carried out;
5. finally, the wind resistance of the athlete fixed on the device is stably transmitted to the force measuring balance in real time through the device of the embodiment of the invention, and resistance data are acquired.
The above description of the size, shape, installation position and the like of the wind tunnel, the auxiliary device, the fitting and other components in the embodiment of the present invention is only for the sake of clarity of the example, and the relevant features of the size, arrangement and the like of the present invention are not limited thereto.
In summary, the embodiment of the invention provides a wind resistance testing and simulation training system for an ice-on-ice project using a wind tunnel, which helps a coach and an athlete to perform posture optimization and intensive training of key technical actions by using quantified wind resistance, and helps the technical staff to research and develop high-performance sports equipment.
The auxiliary supporting device is arranged in the embodiment of the invention, so that the athlete can be helped to keep the motion posture, the decomposition of key technical actions is realized, and the optimization is further carried out. According to the embodiment of the invention, the wind resistance of the athlete in the test process can be obtained through the force measuring balance, so that the quantification of the wind resistance test is realized. The embodiment of the invention can provide the wind speed, the wind resistance and the posture to a coach and an athlete in real time through projection, and provides scientific basis for posture optimization and strengthening training.
According to the embodiment of the invention, according to a relative motion principle, the motion state of an on-ice project is simulated by utilizing the wind speed in the wind tunnel, and attitude wind resistance optimization, equipment wind resistance optimization and strengthening training are carried out in the environment; the auxiliary supporting device is arranged to help the athlete keep the motion posture, so that the decomposition of key technical actions is realized, and further optimization is performed; the wind resistance of the athlete in the test process can be obtained through the balance, so that the quantification of the wind resistance test is realized; the wind speed, the wind resistance and the posture can be provided for coaches and athletes in real time through projection, and scientific basis is provided for posture optimization and strengthening training.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A wind resistance testing and simulation training system for an ice project utilizing a wind tunnel, comprising: the system comprises a wind tunnel, a force measuring balance, a camera monitoring device, an information real-time display device and an auxiliary supporting device;
the device comprises a force measuring balance, an auxiliary supporting device, a camera monitoring device, an information real-time display device and a camera monitoring device, wherein the force measuring balance is fixedly arranged on a bottom plate of the wind tunnel;
the wind tunnel generates wind speed with adjustable size and blows to the direction of a user, the auxiliary supporting device assists in adjusting the posture of the user and keeps the stable action of the user under different wind speeds and postures; the camera monitoring device records real-time motion video of a user, the force measuring balance measures wind resistance data received by the user and transmits the wind resistance data to the information real-time display device, and an information picture of the information real-time display device displays wind speed of a wind tunnel, the wind resistance data received by the user, posture state information of an athlete and a motion posture control command for the user in real time.
2. The system of claim 1, wherein the length, width, height of the test section of the wind tunnel is not less than 4m 3m 2m, and the side wall of the wind tunnel is provided with a transparent observation window to control the relative wind speed of the wind tunnel to be 12-18 m/s.
3. The system of claim 1, wherein the horizontal range of the load cell balance is no less than 100N, and the height of the load cell balance is flush with the ground of the wind tunnel test section.
4. The system of claim 1, 2 or 3, wherein the auxiliary support device comprises a high-strength rubber pad, a bottom plate, an adhesive layer, a cover plate, a limiting block, a positioning pin, a positioning hole and a seat, the high-strength rubber gasket is connected with the bottom plate, the bottom plate is connected with the shroud plate through a bonding layer, the bonding layer connects the bottom plate and the shroud plate into a whole, a plurality of rows of positioning holes and bolt holes are arranged on the upper surface of the shroud plate, the bolt holes respectively correspond to A-type bolts and B-type bolts, the A-type bolts are connected with the shroud plate, the bottom plate and the high-strength rubber pad, and is fixedly connected with a balance force measuring device, the B-shaped bolt is connected with the shroud plate and the seat, the positioning hole is penetrated and connected with the shroud plate and the limiting block by the positioning pin, the limiting block is provided with a square connecting key, the square connecting key is matched with the square groove position clamp at the positioning hole on the surface of the covering plate.
5. The system of claim 4, wherein the high-strength rubber pad is cylindrical in shape, the center of the cross section of the high-strength rubber pad penetrates through the bolt hole of the type A, the bottom surface of the high-strength rubber pad is tightly attached to the surface of the force measuring balance, and the top surface of the high-strength rubber pad is connected with the bottom plate;
the upper surface and the lower surface of the bottom plate are square, 8A-type bolt hole sites and 8B-type bolt hole sites are arranged on the surface of the square corresponding to the surface of the shroud plate;
the upper surface of the shroud plate is provided with 24 rows of positioning holes, 8A-type bolt hole positions and 8B-type bolt hole positions, the 24 rows of positioning holes are arranged on one side of the longitudinal axis of the shroud plate in sequence along the longitudinal axis, each row is provided with two positioning holes, and the 8A-type bolt hole positions and the 8B-type bolt hole positions are respectively and symmetrically arranged relative to the longitudinal axis and the transverse axis of the shroud plate.
6. The system of claim 5 wherein the rows of 24 pilot holes are spaced 50mm on center, the rows of two pilot holes are spaced 170mm on center, the row of pilot holes near the long edge of the shroud is spaced 190mm on center from the long edge, the row of pilot holes near the short axis is spaced 150mm on center from the short axis, and the pilot holes are 10mm in diameter.
7. The system of claim 5, wherein the 8A-bolt hole sites are symmetrical about a longitudinal axis and a transverse axis of the shroud plate, the center-to-center distances of the two side-by-side symmetrical hole sites in the longitudinal axis direction are 240mm, 560mm and 240mm, the center-to-center distances of the two side-by-side symmetrical hole sites in the transverse axis direction are 240mm, 560mm and 240mm, the 8B-bolt hole sites are symmetrical about the longitudinal axis and the transverse axis of the shroud plate, the center-to-center distances of the two side-by-side symmetrical hole sites in the transverse axis direction are 80mm, the center-to-center distances of the two side-by-side symmetrical hole sites in the longitudinal axis direction are 240mm and 400mm, the diameter of the A-bolt hole is 11mm, and the diameter of the B-bolt hole is 11 mm.
8. The system of claim 5, wherein circular grooves are arranged around the 8A-shaped bolt hole positions corresponding to the upper surface of the shroud plate, the diameter of each circular groove is the same as the diameter of a nut of the A-shaped bolt, the depth of each circular groove is the same as the thickness of the nut of the A-shaped bolt, and the circular grooves are matched with the nut clamps of the A-shaped bolt;
the covering plate is connected with the limiting block through the positioning pin, square connecting keys are arranged at two ends of the limiting block, positioning holes are formed in the end part of the limiting block corresponding to the positions of the square connecting keys, and the positioning pin penetrates through the square connecting keys and the positioning holes in the covering plate to connect the limiting block and the covering plate into a whole;
the apron upper surface corresponds be provided with square groove around the locating hole, square groove with square connection key screens coincide, the stopper plays spacing fixed effect to foot ski, through changing the position of stopper realizes that the sportsman tests with different motion postures.
9. The system of claim 4, wherein the cover plate is connected to the seat by the B-bolts, and the seat supports an athlete to be tested while maintaining a certain motion posture;
the seat comprises a base plate, a telescopic rod, a seat cushion and fan-shaped angle iron, wherein the base plate and the telescopic rod are connected into a whole by welding, the fan-shaped angle iron is connected with the base plate and the telescopic rod, and the telescopic rod is connected with the seat cushion;
the surface of bed plate sets up two rows B type bolt hole, every row has two hole sites, on the bed plate surface B type bolt hole with B type bolt hole on the shroud plate corresponds, the bed plate is connected through the welded mode the telescopic link, telescopic link one side sets up fan-shaped angle bar, and this fan-shaped angle bar is connected the bed plate.
10. The system of claim 9, wherein the telescopic rod comprises a fixed rod, a sliding rod and a buckle, the sliding rod is internally sleeved and tightly attached to the inside of the fixed rod, and the buckle fixes the sliding rod at a certain height position of the fixed rod and stops sliding;
the seatpad adopts the rubber material to make, the centre of seatpad sets up a rotation axis, the rotation axis will the seatpad falls into two parts, two parts seatpad winds the rotation axis is upset from top to bottom, two parts seatpad middle part respectively sets up the trompil that the size is moderate, two parts seatpad tip sets up spacing buckle, works as when two parts seatpad upset is merged downwards, spacing buckle is fixed two parts seatpad is whole, this moment the seatpad is transformed into the handrail.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646448A (en) * | 2022-03-18 | 2022-06-21 | 北京交通大学 | Speed skating queue simulation training device utilizing wind tunnel wind resistance test |
| CN115282577A (en) * | 2022-02-12 | 2022-11-04 | 齐齐哈尔大学 | Auxiliary training device for speed skating movement |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4779862A (en) * | 1987-06-29 | 1988-10-25 | Louis Keppler | Exercising apparatus for skaters |
| US4940226A (en) * | 1989-08-28 | 1990-07-10 | Robert Carra | Simulated skating exercising apparatus |
| US5033734A (en) * | 1990-06-21 | 1991-07-23 | Jalbert Timothy J | Training aid for skaters |
| US20050242630A1 (en) * | 2004-04-16 | 2005-11-03 | Jason Miller | Sportsman's lightweight adjustable one legged stool and walking aid |
| CN201175557Y (en) * | 2007-10-29 | 2009-01-07 | 张军 | Air force training hall capable of performing sports training based on wind tunnel principle |
| US20140208839A1 (en) * | 2013-01-28 | 2014-07-31 | Jay White | Open area platform for wind tunnel testing |
| CN208293345U (en) * | 2018-06-07 | 2018-12-28 | 赖红霞 | A kind of skating simulation guide plate |
| CN111150974A (en) * | 2020-01-14 | 2020-05-15 | 黄河水利职业技术学院 | Aerobics exercises teaching aid with adjustable |
-
2021
- 2021-07-23 CN CN202110834407.4A patent/CN113554913A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4779862A (en) * | 1987-06-29 | 1988-10-25 | Louis Keppler | Exercising apparatus for skaters |
| US4940226A (en) * | 1989-08-28 | 1990-07-10 | Robert Carra | Simulated skating exercising apparatus |
| US5033734A (en) * | 1990-06-21 | 1991-07-23 | Jalbert Timothy J | Training aid for skaters |
| US20050242630A1 (en) * | 2004-04-16 | 2005-11-03 | Jason Miller | Sportsman's lightweight adjustable one legged stool and walking aid |
| CN201175557Y (en) * | 2007-10-29 | 2009-01-07 | 张军 | Air force training hall capable of performing sports training based on wind tunnel principle |
| US20140208839A1 (en) * | 2013-01-28 | 2014-07-31 | Jay White | Open area platform for wind tunnel testing |
| CN208293345U (en) * | 2018-06-07 | 2018-12-28 | 赖红霞 | A kind of skating simulation guide plate |
| CN111150974A (en) * | 2020-01-14 | 2020-05-15 | 黄河水利职业技术学院 | Aerobics exercises teaching aid with adjustable |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115282577A (en) * | 2022-02-12 | 2022-11-04 | 齐齐哈尔大学 | Auxiliary training device for speed skating movement |
| CN115282577B (en) * | 2022-02-12 | 2024-02-27 | 齐齐哈尔大学 | Auxiliary training device for speed skating movement |
| CN114646448A (en) * | 2022-03-18 | 2022-06-21 | 北京交通大学 | Speed skating queue simulation training device utilizing wind tunnel wind resistance test |
| CN114646448B (en) * | 2022-03-18 | 2023-02-10 | 北京交通大学 | Speed skating queue simulation training device utilizing wind tunnel wind resistance test |
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Application publication date: 20211026 |