CN110523068B - Ball drop point judging device and method - Google Patents
Ball drop point judging device and method Download PDFInfo
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- CN110523068B CN110523068B CN201910948227.1A CN201910948227A CN110523068B CN 110523068 B CN110523068 B CN 110523068B CN 201910948227 A CN201910948227 A CN 201910948227A CN 110523068 B CN110523068 B CN 110523068B
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0605—Decision makers and devices using detection means facilitating arbitration
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B71/0669—Score-keepers or score display devices
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0605—Decision makers and devices using detection means facilitating arbitration
- A63B2071/0611—Automatic tennis linesmen, i.e. in-out detectors
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/50—Force related parameters
- A63B2220/56—Pressure
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/80—Special sensors, transducers or devices therefor
- A63B2220/803—Motion sensors
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/80—Special sensors, transducers or devices therefor
- A63B2220/83—Special sensors, transducers or devices therefor characterised by the position of the sensor
- A63B2220/833—Sensors arranged on the exercise apparatus or sports implement
Abstract
The invention discloses a ball drop point judging device and a ball drop point judging method, wherein the device comprises a pressure sensing layer for detecting the drop point of a ball, an electromagnetic sensing layer for sensing the approach of the ball, a magnetic substance arranged on the ball, a signal processing system and a judging result output module, wherein the pressure sensing layer and the electromagnetic sensing layer are arranged on a sport field to form a sensing area; when the sphere falls into the induction area, the electromagnetic induction layer transmits the induced current signal to the signal processing system; when the sphere falls into the sensing area, the pressure sensing layer transmits a first falling point position signal of the sphere to the signal processing system; the signal processing system is used for receiving signals of the pressure sensing layer and the electromagnetic sensing layer, judging falling points and transmitting judging results to the judging result output module. The technical scheme of the invention can accurately judge the drop point of the ball, automatically judge whether the ball is out of bounds, improve fairness and objectivity in competition, reduce competition cost and promote healthy development of badminton sports industry.
Description
Technical Field
The invention relates to position judging equipment, in particular to a ball drop point judging and scoring device and method.
Background
In many ball games, it is basically necessary to determine the falling point of the ball to determine whether to score, and it is often difficult to distinguish the falling point from the falling point located near the boundary. The traditional drop point judging method depends on manual work, more judge personnel are needed, and the method is not accurate enough. For example, in a conventional badminton game, there are the following problems: 1. two-player competition also requires 13 players, such as referees, to be six times more than players, and the cost is high and can be known. In this state, it is not difficult to imagine that the development of the exercise is severely restricted and affected. 2. The ball drop point judgment during the competition is mainly based on the eyes of referees and judicial operators to judge whether the ball drop point is within or outside the boundary. Therefore, misjudgment and inconsistent judgment of the athlete and the referee often occur, and the correctness of judgment is verified through the hawk eye heavy video mode, and only 3 opportunities are provided according to regulations, so that the method is a very troublesome and time-consuming mode, the emotion of the athlete is seriously influenced, and the smooth running of the game is influenced. 3. Only manual scoring method, no automatic scoring and real-time automatic scoring display technology is available, and the phenomenon of 'wrong scoring' frequently occurs in the competition without referees, which affects the fairness of the competition and the emotion of athletes.
With the development of technology, in many ball games, the hawk eye technology is adopted as an important means for judging the limit, so that the fairness of the game is improved, and disputes about judge penalties, such as shuttlecocks, volleyballs, tennis balls and the like, are reduced. The hawk-eye technology, also called instant replay system, captures the flight track and landing point of the ball from different angles through a plurality of high-speed cameras at the same time, so as to determine whether the ball is in-bound or out-of-bound. However, when the drop point of the ball is finally determined, the projection area of the whole ball is often used as the drop point, which definitely increases the contact area of the ball and the ground in the actual process, so that the relationship between the actual drop point and the boundary of the ball cannot be objectively reflected, and a certain adverse effect is generated on the competition. For example, in tennis match, the situation often occurs that after the player puts out eagle eye and fights, the player can clearly judge that the edge of the tennis shadow is just pressed on the boundary line, but the referee considers that the line pressing range of the tennis shadow is too small, judges that the round is not counted, and beats again; this undoubtedly results in a certain dispute between the player and the referee, and also gives unnecessary influence to the fans watching the game.
The utility model document with the authorized bulletin number of CN201337800Y discloses an automatic warning device for the out-of-bounds of badminton and volleyball, which is characterized in that a layer of conductive sensing material is coated on the surface of the badminton, and a warning board is arranged at the boundary of a sport field, when the badminton contacts the warning board, two crossed electrodes are short-circuited, and the lamp is lightened and sounds through an amplifier so as to show the out-of-bounds of the badminton. The defects of the method are as follows: 1. because whether the ball falls out of the boundary is judged by the first falling position of the ball, if the first falling point of the ball is positioned in the boundary, and then the ball rolls to the alarm plate, the two crossed electrodes are also short-circuited, so that the ball is misjudged as out of the boundary, and judging errors exist; moreover, when the ball falls at the junction between the boundary of the field and the alarm plate, the ball may touch the boundary and the alarm plate at the same time, and the crossed two electrodes are short-circuited, so that the ball is considered to be out of the boundary, but in actual judgement, the ball is pressed to the boundary and should be considered to be in the boundary, which also causes judgement errors; 2. in order to be in contact with the conductive sensing material on the ball, the printed circuit of the alarm plate is exposed, and is easy to damage due to factors such as abrasion and impact in the use process, so that the reliability is low.
In addition, the invention patent application document with the application publication number CNl01306246A discloses a device for judging whether a ball is out of bounds in a badminton match, the device is characterized in that a hard magnet is arranged at the head of the badminton, a plurality of coils are arranged below a plastic plate of a badminton court in an array mode, when the badminton lands, induced current is generated with the corresponding coils, a corresponding diode is caused to emit light, and therefore the falling point of the badminton is determined, and whether the badminton is out of bounds is judged. The method has the defects that 1, as the falling point of the shuttlecock is judged in an electromagnetic induction mode, induced current can be generated only when the head of the shuttlecock provided with the hard magnet is close to the coil, and the judgment of the falling point of the shuttlecock requires the position where the head of the shuttlecock firstly contacts the ground, so that the situation of misjudgment exists, for example, the head of the shuttlecock possibly triggers the induction coil at the corresponding position when the head of the shuttlecock is close to the ground, after the induced current generated at the moment is detected, the singlechip does not receive the subsequent induced current, the position is considered to be the falling point, and in fact, the head of the shuttlecock can still move to touch the ground again, and if the touchdown point and the induction coil which generates current at first are just positioned inside and outside the boundary line, the position is misjudged as the boundary, so that misjudgment is caused; 2. when the shuttlecock falls between two adjacent induction coils, the induction coils may generate induction current, so that a plurality of diodes emit light at the same time, and the falling point position of the shuttlecock cannot be accurately judged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a ball drop point judging device which can accurately judge the drop point of a ball, automatically and accurately judge the inside or outside of a boundary, improve the fairness and objectivity during competition, avoid disputes and reduce competition cost.
The aim of the invention is achieved by the following technical scheme:
The ball drop point judging device is characterized by comprising a pressure sensing layer for detecting the drop point of a ball, an electromagnetic sensing layer for sensing the approach of the ball, a magnetic substance arranged on the ball and used for generating electromagnetic induction by matching with the electromagnetic sensing layer, a signal processing system and a judging result output module, wherein the pressure sensing layer and the electromagnetic sensing layer are electrically connected with the signal processing system, and the pressure sensing layer and the electromagnetic sensing layer are arranged on a sports ground to form different sensing areas outside and inside the boundary; when the ball falls into the different induction areas, the electromagnetic induction layer transmits the sensed corresponding current signals of the different induction areas to a signal processing system; when the ball falls into the corresponding sensing area, the pressure sensing layer transmits a first falling point position signal of the ball to a signal processing system; the signal processing system is used for receiving signals of the pressure sensing layer and the electromagnetic sensing layer, judging falling points and transmitting judging results to the judging result output module.
The working principle of the ball drop point judging device is as follows:
When the ball falls to approach the induction area of the court glue, but still does not contact the ground, the magnetic substance on the ball and the electromagnetic induction layer generate electromagnetic induction effect to generate induction current, and the induction current is transmitted to the signal processing system for recording, so that the approach of the ball is known; then, in a sensing area where the boundary of the sphere landing site is located, pressure is generated on the pressure sensing layer at the moment of sphere landing, the pressure sensing layer detects the first touchdown point of the sphere and transmits a touchdown point position signal to the signal processing system; the signal processing system judges the position of the falling point by judging the electromagnetic induction line signal and the contact position signal of the pressure induction layer, specifically, after the electromagnetic induction signal is received, whether the contact position signal of the pressure induction layer is received or not is detected within a set time interval (the pressure signal of the pressure induction layer with overlarge time interval before the electromagnetic induction line signal is received or after the electromagnetic induction line signal is received is not considered, so that the interference of the pressure signal triggered by other non-sphere falling points is avoided), if the contact position signal of the pressure induction layer is received, the contact position signal of the pressure induction layer which is received for the first time is selected as the falling point of the sphere, and the falling point of the sphere is judged to be positioned in the boundary or outside the boundary according to the position relation between the contact position of the pressure induction layer and the boundary set in the system; and the judging result is transmitted to the judging result output module to be transmitted to the outside.
Preferably, a pressure signal conversion circuit is connected between the pressure sensing layer and the signal processing system, and a wake-up circuit for controlling whether the signal conversion circuit works is connected to the signal conversion circuit; after the electromagnetic induction layer transmits an electromagnetic induction signal to a signal processing system, the awakening circuit awakens the pressure signal conversion circuit to enter a working state; and when the electromagnetic induction layer does not transmit electromagnetic induction signals to the signal processing system, the pressure signal conversion circuit is in a dormant state. The advantages are that: because only after the electromagnetic induction layer produces the induction signal, it is possible that the spheroid falls into the induction zone, therefore when the electromagnetic induction signal of electromagnetic induction layer is not received, the pressure induction layer is in the dormant state and can not influence normal work, and the pressure signal conversion circuit in the dormant state is favorable to reducing the energy consumption on the one hand, prolongs working life, and can not produce the pressure signal (for example, the athlete tramples the induction zone) and cause the erroneous recognition because of having other factors of non-spheroid to contact the induction zone.
Preferably, the pressure sensing layer and the electromagnetic sensing layer are arranged up and down, the pressure sensing layer is positioned on the upper side of the inner layer of the rubber plate of the court, and the electromagnetic sensing layer is positioned on the lower side of the inner layer of the rubber plate of the court. The pressure sensing layer is in contact with the ball body to generate pressure so as to acquire the sensing signal, and the electromagnetic sensing layer and the ball body can generate the sensing signal in a non-contact state.
Preferably, the pressure sensing layer is formed by a resistive touch sensing panel, and the pressure sensing layer can be specifically manufactured by referring to the principle and structure of a resistive touch screen.
Preferably, the electromagnetic induction layer comprises a plurality of induction coils, and the induction coils are arranged in parallel. Reference may be made to the patent application of the invention published under number CN101306246 a.
Preferably, the ball body is a badminton, and the magnetic substance is arranged at the head of the badminton; the pressure sensing layer and the electromagnetic sensing layer are arranged on a plastic floor of the badminton court. As an application, the ball drop point judging device is applied to the shuttlecock, so that the problems that the number of judges in a shuttlecock match is large, misjudgment is easy to occur and the like can be well solved.
Preferably, the pressure sensing layer and the electromagnetic sensing layer are arranged to cover the entire badminton court. In this way, any point of the shuttlecock falling into the field can be accurately detected, so that automatic judgment and automatic scoring under different match modes can be realized, for example, in a single match mode, a signal processing system can select a boundary line corresponding to the single match mode and an area within the boundary line as an effective match area, and not only can the shuttlecock falling into the vicinity of the boundary line be accurately judged to be within or outside the boundary line, but also the falling point can be detected for the shuttlecock falling into other positions in the field, so that automatic scoring is realized, for example, when a service ball falls into the ground, the signal processing system can automatically judge whether the shuttlecock falls into a set service area, if the shuttlecock falls into the service area, the service party scores instead, but also if the shuttlecock falls into the boundary line, the service party scores outside the boundary line. Similarly, for the double-play mode, the signal processing system can automatically switch the boundary line of the field, automatically judge the drop points of the shuttlecocks according to the score rules of the games and then automatically score. Thus, scoring of the game can be automatically completed when no referee is available.
Preferably, the judging result output module comprises a display screen or/and a loudspeaker; when a display screen is used, the boundary line near the falling point of the sphere and the falling point of the sphere are displayed on the display screen. The judging result can be displayed in a display and sound mode respectively through the display screen and the loudspeaker, so that on-site personnel can learn quickly, and meanwhile, the display screen can display the conditions of the match such as score and the like.
According to a preferred scheme of the invention, the pressure sensing layer comprises an outer sensing layer and an inner sensing layer, and the outer sensing layer and the inner sensing layer are connected with a signal processing system; when the outer induction layer detects the falling point of the ball, the signal processing system judges that the ball is out of the boundary, and when the inner induction layer detects the falling point of the ball, the signal processing system judges that the ball is in the boundary. Through the setting of outer inductive layer and interior inductive layer, it is inside the boundary or outside the boundary to make things convenient for the judgement ball's drop point more, reduces data processing volume, is favorable to accelerating signal processing system's judgement speed.
In a preferred embodiment of the present invention, the pressure sensing layer is composed of a plurality of pressure sensing units, and all the pressure sensing units are connected with the signal processing system; the electromagnetic induction layer is composed of a plurality of electromagnetic induction units. Therefore, only the electromagnetic induction unit generating induction current with the magnetic substance on the ball body and the corresponding pressure induction unit can operate, the operation consumption of other components is saved, the cost is reduced, and meanwhile, each pressure induction unit and each electromagnetic induction unit are responsible for detecting a designated range, and the accuracy of ball drop point judgment is improved.
A ball drop point judging method is characterized in that an electromagnetic induction layer for inducing the approach of a ball body and a pressure induction layer for detecting the drop point of the ball are arranged on a sports ground, and magnetic substances for generating electromagnetic induction in a matching way with the electromagnetic induction layer are arranged on the ball body; the pressure sensing layer and the electromagnetic sensing layer are arranged at the inner side and the outer side of the boundary of the sports ground to form sensing areas;
When the sphere falls to an induction area close to the boundary of the field but still does not contact the ground of the field, the magnetic substance on the sphere and the electromagnetic induction layer generate electromagnetic induction effect to generate induction current, and the induction current is transmitted to a signal processing system for recording, so that the approach of the sphere is known; then, in a sensing area where the boundary of the sphere landing site is located, pressure is generated on the pressure sensing layer at the moment of sphere landing, the pressure sensing layer detects the first touchdown point of the sphere and transmits a touchdown point position signal to the signal processing system; the signal processing system judges the falling point position by judging the electromagnetic induction line signal and the contact point position signal of the pressure induction layer, and judges whether the falling point of the sphere is positioned in the boundary or outside the boundary according to the position relation between the contact point position of the pressure induction layer and the boundary set in the system; and the judging result is transmitted to the judging result output module to be transmitted to the outside.
Preferably, after the electromagnetic induction layer transmits an electromagnetic induction signal to the signal processing system, the pressure induction layer enters a working state; the pressure sensing layer is in a dormant state when the electromagnetic sensing layer does not transmit electromagnetic sensing signals to the signal processing system.
Preferably, the signal processing system carries out automatic scoring according to the judgment result of the drop point, and the scoring result is presented to the outside through the judgment result output module.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention judges the falling point of the sphere through the pressure sensing layer, is used for directly detecting the falling point, and has no error.
2. The invention judges whether the ball approaches or not by mutually inducing the electromagnetic induction layer and the magnetic substance arranged on the ball body to generate the electromagnetic induction signal, thereby providing a guarantee for the uniqueness of the detection result of the pressure induction layer, ensuring the uniqueness and the accuracy of the ball drop point by double confirmation and fundamentally ensuring the objectivity of the drop point judgment and avoiding the score error of a judge.
3. By applying the judging device and the judging method, the cost of sports competition can be reduced, and the labor is saved.
4. Can realize automatic scoring competition and scoring competition without referee.
5. When the sphere falls near the boundary line, the falling point position of the sphere can be displayed to the scene through the judging result output module, so that athletes and other people outside the scene can quickly and intuitively know the falling point condition of the sphere.
Drawings
Fig. 1 is an electrical schematic block diagram of a ball drop point determination device according to the present invention.
Fig. 2 is a sectional view showing an arrangement structure of one of the pressure sensing layer and the electromagnetic sensing layer in the ball drop point judging device according to the present invention.
Fig. 3 is a cross-sectional view of another arrangement structure of the pressure sensing layer and the electromagnetic sensing layer in the ball drop point judging device according to the present invention.
Fig. 4 is a plan view of a specific arrangement structure of the pressure sensing layer applied in a badminton court in the ball drop point judging device according to the present invention.
Fig. 5 is a schematic view of a structure of a magnetic substance disposed on a shuttlecock in the ball drop point determination device according to the present invention.
Fig. 6 is a flow chart of a ball drop point determination method according to the invention.
Detailed Description
The invention is further described below with reference to examples and figures, but embodiments of the invention are not limited thereto.
Referring to fig. 1-5, the ball drop point judging device of the invention comprises a pressure sensing layer 2 for detecting the drop point of a ball, an electromagnetic sensing layer 3 for sensing the approach of the ball, a magnetic substance 4 arranged on the ball and used for generating electromagnetic induction in a matching way with the electromagnetic sensing layer 3, a signal processing system and a judging result output module, wherein the pressure sensing layer 2 and the electromagnetic sensing layer 3 are electrically connected with the signal processing system, and the pressure sensing layer 2 and the electromagnetic sensing layer 3 are arranged at the inner side and the outer side of the boundary of a sports ground to form sensing areas; when the sphere falls into the sensing area, the pressure sensing layer 2 transmits a first falling point position signal of the sphere to a signal processing system; when the sphere falls into the induction zone, the electromagnetic induction layer 3 transmits the induced current signal to a signal processing system; the signal processing system is used for receiving signals of the pressure sensing layer 2 and the electromagnetic sensing layer 3, judging falling points and transmitting judging results to the judging result output module.
Referring to fig. 5, taking the shuttlecock 7 as an example, the magnetic substance 4 is disposed on the shuttlecock head 7-1, and the magnetic substance 4 may be a hard magnetic material and is disposed by means of a coating layer; the arrangement of the magnetic substance 4 should not affect the original weight, centre of gravity, shape, colour etc. of the sphere.
A pressure signal conversion circuit is connected between the pressure sensing layer 2 and the signal processing system, and a wake-up circuit for controlling whether the signal conversion circuit works is connected to the signal conversion circuit; after the electromagnetic induction layer 3 transmits an electromagnetic induction signal to a signal processing system, the awakening circuit awakens the pressure signal conversion circuit to enter a working state; the electromagnetic induction layer 3 is in a dormant state when the electromagnetic induction signal is not transmitted to the signal processing system. An electromagnetic signal conversion circuit is also arranged between the electromagnetic induction layer 3 and the signal processing system, and the current generated by electromagnetic induction is amplified and then converted into a signal (for example, analog-to-digital conversion is performed) which can be identified by the signal processing system. In the above scheme, since it is only possible that the sphere falls into the sensing area after the electromagnetic sensing layer 3 generates the sensing signal, when the electromagnetic sensing signal of the electromagnetic sensing layer 3 is not received, the pressure sensing layer 2 is in a dormant state and cannot influence normal operation, and the pressure signal conversion circuit in the dormant state is beneficial to reducing energy consumption, reducing heat productivity and prolonging service life on one hand, and can not cause erroneous recognition because pressure signals (such as athletes stepping on the sensing area) are generated after other factors of the non-sphere contact the sensing area.
Referring to fig. 2, the pressure sensing layer 2 and the electromagnetic sensing layer 3 are disposed up and down, the pressure sensing layer 2 is disposed at an upper side, and the electromagnetic sensing layer 3 is disposed at a lower side. Because the pressure sensing layer 2 needs to be contacted with the sphere to generate pressure so as to acquire the sensing signal, and the electromagnetic sensing layer 3 and the sphere can generate the sensing signal in a non-contact state, the pressure sensing layer 2 is arranged on the upper side, the electromagnetic sensing layer 3 is arranged on the lower side, the respective performances are better exerted, and the electromagnetic sensing layer 3 is prevented from being damaged by direct treading when being arranged on the upper side. Taking a badminton court as an example, the pressure sensing layer 2 and the electromagnetic sensing layer 3 are arranged on the plastic floor 1 of the badminton court, wherein the pressure sensing layer 2 can be embedded on the upper surface of the plastic floor 1, and the electromagnetic sensing layer 3 is also embedded on the plastic floor 1 and is positioned below the pressure sensing layer 2. When the plastic floor 1 is manufactured, the pressure sensing layer 2 is arranged as a strip-shaped independent component, an interface connected with an external circuit is reserved, the position (such as a groove) where the pressure sensing layer 2 is arranged is reserved when the plastic floor 1 is manufactured, then the pressure sensing layer 2 is embedded into the reserved position of the plastic floor 1, and the two components are combined together in a glue or ultrasonic compounding mode; in order to protect the pressure sensing layer 2, a protective layer may be disposed on the upper surface of the pressure sensing layer 2, or after the pressure sensing layer 2 is embedded on the plastic floor 1, a protective layer may be laid at the position where the pressure sensing layer 2 is disposed. Then the corresponding border is printed on the plastic floor 1. The electromagnetic induction layer 3 may be arranged in a similar manner, and the electromagnetic induction layer 3 is prefabricated into a strip-shaped or sheet-shaped independent component and then embedded into the plastic floor 1.
In addition, referring to fig. 3, the pressure sensing layer 2 and the electromagnetic sensing layer 3 may be disposed on the plastic floor 1 of the badminton court as follows: the first layer from top to bottom is a functional use layer 1-1, the second layer is a pressure sensing layer 2, the third layer is an insulating separation layer 1-2, the fourth layer is an electromagnetic induction layer 3, and the fifth layer is a vibration-proof layer 1-3. Wherein the functional layer 1-1 is the surface of the field, is in direct contact with the mobilization, has an anti-skid function, and is printed with a field boundary line; the pressure sensing layer 2 is located between the functional use layer 1-1 and the insulating separation layer 1-2, the insulating separation layer 1-2 plays a role in shock absorption and buffering, the step of a sportsman is prevented from bearing overlarge impact, the comfort is improved, meanwhile, the pressure sensing layer 2 is protected, the pressure sensing layer 2 and the floor surface are separated by the functional use layer 1-1, on one hand, the pressure sensing layer 2 is not exposed on the surface so as to avoid damage, and on the other hand, the pressure sensing layer 2 is ensured to have higher sensitivity due to the fact that only one thinner functional use layer 1-1 is separated, and the falling point signal of the badminton can be accurately detected. The electromagnetic induction layer 3 is positioned between the insulating separation layer 1-2 and the vibration isolation layer 1-3, the two vibration isolation layers are combined to have good vibration absorption and buffering effects, and the electromagnetic induction layer 3 clamped between the two vibration isolation layers is also protected.
The pressure sensing layer 2 is formed by a resistive touch sensing plate, and the pressure sensing layer 2 can be manufactured specifically by referring to the principle and structure of a resistive touch screen. The electromagnetic induction layer 3 comprises a plurality of induction coils, and the induction coils are connected in parallel. Reference may be made to the patent application of the invention published under number CN101306246 a.
In order to more conveniently judge whether the sports ground is out of bounds, the pressure sensing layer 2 is divided into an outer sensing layer and an inner sensing layer, wherein the outer sensing layer is arranged on the outer side of the outer edge of the sports ground, and the inner sensing layer is arranged on the inner side of the outer edge of the sports ground; the outer induction layer and the inner induction layer are connected with a signal processing system; when the outer induction layer detects the falling point of the ball, the signal processing system judges that the ball is out of the boundary, and when the inner induction layer detects the falling point of the ball, the signal processing system judges that the ball is in the boundary. Through the setting of outer inductive layer and interior inductive layer, it is inside the boundary or outside the boundary to make things convenient for the judgement ball's drop point more, reduces data processing volume, is favorable to accelerating signal processing system's judgement speed.
Specifically, referring to fig. 4, taking a badminton court as an example, for the inner boundary line 6 and the outer boundary line 5, an outer induction layer 2-1 and an outer boundary line inner induction layer 2-2 are respectively arranged, and for the inner boundary line outer induction layer 2-3 and the inner boundary line inner induction layer 2-4, the drop points of the shuttlecocks represent different meanings for different competition modes (single play and double play), and by dividing the pressure induction layers 2 of the inner boundary line 6 and the outer boundary line 5, whether the shuttlecocks are out of the boundary can be rapidly judged in different competition modes.
Because the area of the competition area is large, the pressure sensing layer 2 can be formed by a plurality of pressure sensing units, and all the pressure sensing units are connected with the signal processing system; the electromagnetic induction layer 3 is also constituted by a plurality of electromagnetic induction units. Therefore, only the electromagnetic induction unit generating induction current with the magnetic substance 4 on the ball body and the corresponding pressure induction unit can operate, the operation consumption of other components is saved, the cost is reduced, and meanwhile, each pressure induction unit and each electromagnetic induction unit are responsible for detecting a designated range, and the accuracy of ball drop point judgment is improved.
Further, since the pressure sensing layer 2 and the electromagnetic sensing layer 3 are formed by combining a plurality of small units, in order to further improve accuracy and reduce energy consumption, on one hand, the wake-up area of the pressure sensing layer 2 after receiving the sensing signal of the electromagnetic sensing layer 3 can be further limited, theoretically, the wake-up area is larger than or equal to the maximum area of the ball head under the condition that the ball head has pressure with the ground, but smaller than a certain value, for example, the wake-up area can be set to be a 3×3=9cm 2 area, and after receiving the electromagnetic sensing signal, the ball body is only waited for the ground contact signal in an area of 9cm 2 around the electromagnetic sensing signal, so that the power consumption can be greatly reduced, and the interference caused by other unexpected factors, such as the tread of the racket or the sole of the athlete, the hand after the athlete is wrestled and other position firing can be further reduced; on the other hand, the starting induction distance of the electromagnetic induction layer 3 can be further set, for example, the electromagnetic induction layer 3 can induce the ball only when the ball reaches a height position 2cm away from the ground, which can be achieved by adjusting the induction distance of the electromagnetic induction layer, so that the electromagnetic induction layer 3 can induce the arrival signal of the ball only within a set range, and thus, the situation of misjudgment can be further eliminated, for example, when the ball is about to contact the ground, the situation of continuing to hit the ball can be possibly relieved, at the moment, the ball is likely to touch the ground, misjudgment is caused, and by setting the induction distance small enough, the situation can be eliminated, and the uniqueness is ensured to the greatest extent. Thus, when the distance between the ball body and the ground is set, an electromagnetic induction signal is generated, and then the pressure induction layer 2 in a set area around the generated electromagnetic induction signal enters a working state, so that the uniqueness of ball body judgment is further improved, and the energy consumption is greatly reduced. Of course, the maximum induction distance can be flexibly adjusted according to the requirement, and can be set into a stepless adjustment mode, so that the use is more flexible.
As a preferred mode, the pressure sensing layer and the electromagnetic sensing layer are arranged to cover the entire badminton court. In this way, any point of the shuttlecock falling into the field can be accurately detected, so that automatic judgment and automatic scoring under different match modes can be realized, for example, in a single match mode, a signal processing system can select a boundary line corresponding to the single match mode and an area within the boundary line as an effective match area, and not only can the shuttlecock falling into the vicinity of the boundary line be accurately judged to be within or outside the boundary line, but also the falling point can be detected for the shuttlecock falling into other positions in the field, so that automatic scoring is realized, for example, when a service ball falls into the ground, the signal processing system can automatically judge whether the shuttlecock falls into a set service area, if the shuttlecock falls into the service area, the service party scores instead, but also if the shuttlecock falls into the boundary line, the service party scores outside the boundary line. Similarly, for the double-play mode, the signal processing system can automatically switch the boundary line of the field, automatically judge the drop points of the shuttlecocks according to the score rules of the games and then automatically score. Thus, scoring of the game can be automatically completed when no referee is available.
The signal processing system is a computer system with a data processing function, and generally comprises a processor, a memory, a power module, a communication module and the like, and can be formed by a computer. The special software program is arranged in the computer and is used for calculating and processing the signals transmitted by the pressure sensing layer 2 and the electromagnetic sensing layer 3, and the competition rules can be set, so that automatic scoring is realized.
The judging result output module comprises a display screen and a loudspeaker, wherein the display screen can be arranged beside the playing field and can be arranged in plurality, so that both athletes and Layoffs can see the judging result in real time. The judging result can be displayed in a display mode and a sound mode respectively through the display screen and the loudspeaker, and the boundary line near the falling point of the sphere and the falling point of the sphere are displayed on the display screen, so that the scene personnel can know the situation rapidly, and meanwhile, the display screen can display the situation of score of a match and the like.
Referring to fig. 6, in the ball drop point judging method of the present invention, specifically, an electromagnetic induction layer 3 for sensing the approach of a ball and a pressure induction layer 2 for detecting the drop point of the ball are disposed on a sports ground, and a magnetic substance 4 for generating electromagnetic induction by matching with the electromagnetic induction layer 3 is disposed on the ball; the pressure sensing layer 2 and the electromagnetic sensing layer 3 are arranged on the inner side and the outer side of the boundary of the sports ground to form sensing areas.
When the sphere falls to an induction area close to the boundary of the field but still does not contact the ground of the field, the magnetic substance 4 on the sphere and the electromagnetic induction layer 3 generate electromagnetic induction effect to generate induction current, and the induction current is transmitted to a signal processing system for recording, so that the approach of the sphere is known; then, in a sensing area where the boundary of the ball landing field is located, pressure is generated on the pressure sensing layer 2 at the moment of ball landing, the pressure sensing layer 2 detects the first touchdown point of the ball and transmits a touchdown point position signal to the signal processing system; the signal processing system judges the falling point position by judging the electromagnetic induction line signal and the contact point position signal of the pressure induction layer 2, and judges whether the falling point of the sphere is positioned in the boundary or outside the boundary according to the position relation between the contact point position of the pressure induction layer 2 and the boundary set in the system; and the judging result is transmitted to the judging result output module to be transmitted to the outside.
After the electromagnetic induction layer 3 transmits electromagnetic induction signals to a signal processing system, the pressure induction layer 2 enters a working state; the electromagnetic induction layer 3 is in a dormant state when no electromagnetic induction signal is transmitted to the signal processing system, and the pressure induction layer 2 is in a dormant state. Thereby saving energy consumption and also discharging the influence of other interference factors on the pressure sensing layer 2.
The signal processing system carries out automatic scoring according to the judgment result of the drop point, and the scoring result is presented to the outside through the judgment result output module.
In addition, although the electromagnetic induction layer 3 is adopted to be matched with the magnetic substance on the sphere to ensure uniqueness, the sphere needs to be specially arranged, and common spheres, such as common shuttlecocks, can be identified by the device and the method of the invention, for example, the pressure range and the area range of the contact with the ground are set according to the common acting force and the area of the contact with the ground when the shuttlecock is contacted with the ground, and only the effective contact falling in the range is regarded as the contact of the shuttlecock; for another example, the method can also be used for discharging the contact of the non-sphere by adding the modes of judging a heat source (a human body), judging a metal substance and the like, so that the application of the invention is wider and more flexible.
The foregoing is illustrative of the present invention, and is not to be construed as limiting thereof, but rather as various changes, modifications, substitutions, combinations, and simplifications which may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The ball drop point judging device is characterized by comprising a pressure sensing layer for detecting the drop point of a ball, an electromagnetic sensing layer for sensing the approach of the ball, a magnetic substance arranged on the ball and used for generating electromagnetic induction by matching with the electromagnetic sensing layer, a signal processing system and a judging result output module, wherein the pressure sensing layer and the electromagnetic sensing layer are electrically connected with the signal processing system, and the pressure sensing layer and the electromagnetic sensing layer are arranged on a sports ground to form different sensing areas outside and inside the boundary; when the ball falls into the different induction areas, the electromagnetic induction layer transmits the sensed corresponding current signals of the different induction areas to a signal processing system; when the ball falls into the corresponding sensing area, the pressure sensing layer transmits a first falling point position signal of the ball to the signal processing system; the signal processing system is used for receiving signals of the pressure sensing layer and the electromagnetic sensing layer, judging falling points and transmitting judging results to the judging result output module;
A pressure signal conversion circuit is connected between the pressure sensing layer and the signal processing system, and a wake-up circuit for controlling whether the signal conversion circuit works is connected to the signal conversion circuit; after the electromagnetic induction layer transmits an electromagnetic induction signal to a signal processing system, the awakening circuit awakens the pressure signal conversion circuit to enter a working state; when the electromagnetic induction layer does not transmit electromagnetic induction signals to the signal processing system, the pressure signal conversion circuit is in a dormant state;
The pressure sensing layer and the electromagnetic sensing layer are arranged up and down, the pressure sensing layer is positioned on the upper side, and the electromagnetic sensing layer is positioned on the lower side;
the pressure sensing layer is composed of a plurality of pressure sensing units, and all the pressure sensing units are connected with the signal processing system; the electromagnetic induction layer is composed of a plurality of electromagnetic induction units;
Each pressure sensing unit and each electromagnetic sensing unit are responsible for detecting a designated range; when the distance between the ball body and the ground is set, an electromagnetic induction signal is generated, and then the pressure induction layer in a set area around the electromagnetic induction signal is put into a working state.
2. The ball drop point determination device according to claim 1, wherein the ball is a shuttlecock, and the magnetic substance is provided at a head of the shuttlecock; the pressure sensing layer and the electromagnetic sensing layer are arranged on a plastic floor of the badminton court.
3. The ball drop point determining device according to claim 2, wherein the pressure sensing layer and the electromagnetic sensing layer are disposed on a plastic floor of a badminton court in the following structure: the first layer from top to bottom is a functional use layer, the second layer is a pressure sensing layer, the third layer is an insulating separation layer, the fourth layer is an electromagnetic induction layer, and the fifth layer is a vibration-proof layer.
4. The ball drop point determination device of claim 2, wherein the pressure sensing layer and electromagnetic sensing layer are disposed to cover the entire badminton court.
5. The ball drop point determination device of claim 1, wherein the determination result output module comprises a display screen and a speaker.
6. The ball drop point determination device of claim 1, wherein the pressure sensing layer comprises an outer sensing layer and an inner sensing layer, the outer sensing layer being disposed outside of a boundary outer edge of the playing surface, the inner sensing layer being disposed inside of the boundary outer edge of the playing surface; the outer induction layer and the inner induction layer are connected with a signal processing system; when the outer induction layer detects the falling point of the ball, the signal processing system judges that the ball is out of the ball boundary, and when the inner induction layer detects the falling point of the ball, the signal processing system judges that the ball is in the boundary.
7. A ball drop point judging method realized by the ball drop point judging device according to any one of claims 1-6, characterized in that an electromagnetic induction layer for sensing the approach of a ball body and a pressure induction layer for detecting the drop point of the ball are arranged on a sports ground, and a magnetic substance for generating electromagnetic induction by matching with the electromagnetic induction layer is arranged on the ball body; the pressure sensing layer and the electromagnetic sensing layer are arranged at the inner side and the outer side of the boundary of the sports ground to form sensing areas;
When the sphere falls to an induction area close to the boundary of the field but still does not contact the ground of the field, the magnetic substance on the sphere and the electromagnetic induction layer generate electromagnetic induction effect to generate induction current, and the induction current is transmitted to a signal processing system for recording, so that the approach of the sphere is known; then, in a sensing area where the boundary of the sphere landing site is located, pressure is generated on the pressure sensing layer at the moment of sphere landing, the pressure sensing layer detects the first touchdown point of the sphere and transmits a touchdown point position signal to the signal processing system; the signal processing system judges the falling point position by judging the electromagnetic induction line signal and the contact point position signal of the pressure induction layer, and judges whether the falling point of the sphere is positioned in the boundary or outside the boundary according to the position relation between the contact point position of the pressure induction layer and the boundary set in the system; and the judgment result is transmitted to a judgment result output module to be transmitted to the outside; after the electromagnetic induction layer transmits electromagnetic induction signals to the signal processing system, the pressure induction layer enters a working state; the pressure sensing layer is in a dormant state when the electromagnetic sensing layer does not transmit electromagnetic sensing signals to the signal processing system.
8. The ball drop point determination method of claim 7, wherein the field is a badminton field and the ball is a shuttlecock; dividing a field into a plurality of induction areas for inducing data signals according to the need of single-beat or double-beat; the signal processing system carries out automatic scoring according to the judgment result of the drop point, and the scoring result is presented to the outside through the judgment result output module.
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