CN1109374A - Device for detecting position of collision of objects - Google Patents

Abstract

The invention aims at providing a device used for the exercise and the game of stroking matches such as short-rage hitting of golf, shooting by using a game gun or batting of a baseball. A target 12 is arranged oppositely to a position 16 of a shot out ball 17 or the like, and microphones 101-105 are arranged at least at three places surrounding the target 12 and at a shooting place to detect the impacting sound of the ball 17. In a controller 14, the detected moments are analyzed to calculate the flight time, the impacting position on the target and the track of the ball 17.

Description

Device for detecting position of collision of objects

The present invention relates to can be used as golf (particularly approach shot) and exercise apparatus of shooting and game device etc. and the device of use.

The desired technology of golf competition can be divided into long-range batting, short range batting and tip-tap, and long-range batsmanship is used for ball is arrived at a distance towards correct direction impelling as far as possible; The short range batsmanship mainly is conceived to ball is beaten to correct direction and distance; The tip-tap technology then is used for ball is squeezed in the hole on the meadow.

For the general people who plays golf in fact, the number of times of allegedly long-range, short range and tip-tap is identical basically, so, in order to improve the score of golf, must practise various technology fifty-fifty.

Wherein, the golf driving cages that long-range batsmanship can be set up in various places is called usually " let go and beat " is practised, the special-purpose training field that the tip-tap technology also can be at an easy rate opened up simultaneously at golf driving cages or practise practising with mat etc. with commercially available tip-tap.The short range batsmanship then must be played ball in the short distance (usually less than 100m) of the maximum flying distance of the ball that hits than employed club, and adjusts the strength of using so that direction and distance are correct.Therefore, certainly just can not practise together in the tip-tap training field, in addition, in " let go and beat " training field, usually since the design of " let go and beat " training field mainly for the medicine ball pole technology, so, also inapplicable for the short range practice stroke of the direction that need in relatively shorter distance, correctly proofread and correct ball.In addition, at the golf course of reality, there is the training field with the corresponding exercise of difference of height on meadow of playing ball a little to carry out common existence hardly.

Though people have proposed the various schemes that do not account for the golf practice apparatus in place, but, except the device that the professional athlete of costliness uses, the exercise apparatus that general family can buy mainly is the exercise usefulness of carrying out posture and action, and the device that can play real ball can only use needs the exercising net that constitutes with pipe and net of big garden or the equipment of using mat and so on as practice stroke.

Therefore, the present invention is intended to address the above problem, and a kind of device for detecting position of collision of objects is provided, thereby can improve the short range batsmanship that in the past is difficult to the golf accomplished effectively, and can realize the exercise apparatus of playing ball that is used for practising like a cork.And, the present invention is by utilizing such device for detecting position of collision of objects, be not limited only to the exercise of golf, also be intended to realize to be used for the exercise of the batting of baseball and pitching and use the various matches such as gunnery practice of plinker gunnery practice, throw the device of exercise and recreation.

In order to address the above problem, device for detecting position of collision of objects of the present invention is characterised in that to have:

A) be arranged on around the detection range not at least three impact sound tone Detectors on same straight line;

B) detect the arithmetic unit that the moment of colliding sound calculates the position of collision of objects in the detection range according to each impact sound tone Detector.

In addition, also can have:

C) ejaculation that detects the moment that the object bump penetrates from the place of appointment detector constantly;

D) the 2nd arithmetic unit, it detects the moment of collision sound according to each impact sound tone Detector and penetrates ejaculation that detector constantly detects the traveling time when calculating object constantly and injecting to object collision from penetrating the place, and and then calculates the track of object before the collision and the imaginary track after the collision according to the position of collision of objects that this traveling time and arithmetic unit are calculated.

Be characterised in that to have in order to address the above problem the bump exercise apparatus of the present invention that utilizes such device for detecting position of collision of objects and constitute:

A) be fixed on the target screen that the thin material on the framework constitutes by tightening;

B) at least three impact sound tone Detectors of configuration around above-mentioned target screen;

Flight time when c) moment that detects collision sound according to each impact sound tone Detector calculates flying body and injects to flying body with the collision of target screen from penetrating the place and the arithmetic unit of the position of collision of flying body on target shields.

In addition, can also have:

D) being located at target shields the place ahead and detects the ejaculation moment detector of flying body from the moment of ejaculation place ejaculation;

E) shield the collision track and collision imaginary track the 2nd arithmetic unit afterwards of flying body before according to the flight time and the position of collision calculating of above-mentioned flying body with target.

In addition, can also be provided with demonstration is the display that flying body collides the position on the target screen, the track of flying body etc. by arithmetic unit or the 2nd arithmetic unit result calculated, and collision impact point and the scoring area of depicting flying body on the thin material of target screen get final product.

Utilize device for detecting position of collision of objects of the present invention, when jobbie bumps with another object in detection range, the collision sound that each impact sound tone Detector takes place when just detecting their collisions.Arithmetic unit will go out to detect each moment of colliding sound (the collision sound detection constantly) according to the detection signal that each impact sound tone Detector is exported is specific, and utilizes the acoustic velocity value calculating position of collision that respectively collides the sound detection moment and appointment.Because the impact sound tone Detector is configured in around the detection range not at least three places on same straight line, so, in calculating, this, can calculate the position (position of collision of objects) of the point of impingement of object in detection range according to the principle the same with the hypocentral location of definite earthquake.Acoustic velocity value used herein can be predesignated standard figures by data such as reference natural sciences handbooks, and use this value, and the peripheral temperature detector also can be set in addition, utilizes and measures temperature correction standard acoustic velocity value.In addition,, the velocity of sound is included in the unknown number calculates, can also calculate the velocity of sound simultaneously and from the distance of position of collision to three an impact sound tone Detector by using the impact sound tone Detector more than four.

The position of the ejaculation place of object and the detection range of collision relation, be provided with penetrate place and each impact sound tone Detector in decision owing to know in advance, so, the track that just can determine object according to the traveling time and the position of collision of object.Because the shape of track has nothing to do with collisionless is arranged, so, if object does not bump, also can obtain mobile imaginary track.The 2nd arithmetic unit carries out this track and calculates.That is, earlier according to the detection of collision sound constantly and the ejaculation of object calculate traveling time constantly, the position of collision of objects of calculating according to this traveling time and arithmetic unit then calculates the track (comprising imaginary track) of object.

Bump exercise apparatus of the present invention is exactly the device that has utilized above-mentioned device for detecting position of collision of objects, and its effect is as follows:

The player is shielded emission bullet if the plate machine is just pulled in the rifle shooting to target penetrating the place for example if the exercise of the short range of golf batting is just shielded batting with club to target.Flying body that penetrates and target screen bump, and sound therefore bumps.This collision sound is detected by (be fixed on the framework easily, still, not necessarily stick to this) three the impact sound tone Detectors that are configured in around the target screen.Arithmetic unit is determined the moment that detects each collision sound according to the detection signal of each impact sound tone Detector output, uses the acoustic velocity value of appointment, determines the position that the target screen is gone up the point of impingement according to the principle the same with the hypocentral location of definite earthquake.Acoustic velocity value used herein can be predesignated the numerical value of standard by data such as reference natural sciences handbooks, and use this value, but also the peripheral temperature detector can be set in addition, utilizes and measures temperature correction standard acoustic velocity value.In addition,, the velocity of sound is included in the unknown number calculates, can also calculate the velocity of sound simultaneously and from the distance of position of collision to three an impact sound tone Detector by using the impact sound tone Detector more than four.

For example if golf practice apparatus, penetrate constantly that detector just detects the sound of playing ball, if just utilizing the action of the action of electronic method check-out console machine and bullet to detect, the rifle shooting penetrates constantly.This ejaculation detection signal constantly is transmitted to arithmetic unit.The flying body that ejaculation is gone (ball of getting, the bullet of ejaculation etc.) is according to the initial velocity when penetrating and penetrate relevant track such as angle to the flight of target screen direction, through after the time of appointment with the target screen on certain a bit (point of impingement) bump.The position of collision that target knocks is determined by said method, in addition, also can calculate at an easy rate according to said method with the collision moment (owing to having calculated the position of collision and the velocity of sound) of target screen collision.

The position relation of ejaculation place and target screen is to determine when the target screen being set and penetrating the place, owing to know in advance, so, determine the track of flying body according to the coordinate of the flight time of flying body (this ejaculation that can be used as detection is obtained with the collision that calculates difference constantly constantly) and the point of impingement.Because the shape of track has nothing to do with collisionless is arranged, so, if flying body and target screen do not bump, also can obtain the imaginary track of flight.The 2nd arithmetic unit carries out this track and calculates usefulness.The operation result of arithmetic unit and the 2nd arithmetic unit can also be by sound, print to the first-class various forms of paper and tell the player except utilizing displays such as CRT, LCD.The player can export the result according to this and judge whether the batting of oneself achieves one's goal, thus the exercise that can be effectively applied to next time bat.

Fig. 1 is that embodiments of the invention are the brief configuration figure of golf short range ball hitting practive apparatus.

Fig. 2 be expression batting back ball various tracks and with the key diagram of the relation of the position of collision of target screen and angle.

Fig. 3 is the circuit structure block diagram as the golf short range ball hitting practive apparatus of embodiment.

Fig. 4 is the key diagram that expression target screen is gone up the microphonic position relation (situation of embodiment 1) of the position of collision of ball and setting on every side.

Fig. 5 is the track key diagram when between batter's box and the position, lawn difference of height being arranged.

Track key diagram when Fig. 6 is the skew ground strike to the left and right of ball quilt.

Fig. 7 is illustrated in the target screen and plays ball the brief configuration figure of the golf short range ball hitting practive apparatus of receiving the ball frame is set between the place.

Fig. 8 is the hit thin screen front elevation (a) and the side view (b) of screen of the golf short range ball hitting practive apparatus as embodiment.

Fig. 9 is the front elevation (a) and the side view (b) of the state on the framework that the thin screen of target screen is fixed on.

Figure 10 is the A among Fig. 9 and the profile at B place.

Figure 11 is the profile at the C place among Fig. 9.

The temperature sensing circuit figure that Figure 12 uses when being to use temperature sensor to ask the velocity of sound.

Figure 13 is the position of collision of the ball on the expression target screen and the key diagram of the microphonic position relation (situation of embodiment 2) that is provided with on every side.

The key diagram that Figure 14 this position of collision that is the expression position of collision in the rectangle outside that to dispose microphonic four angles be the summit time and microphonic position concern.

11 frameworks, 12 thin screens (target screen)

Lower end 14 controllers of 13 thin screens

The play ball mat at place place of 15 display equipments 16

17 balls, 18 ball tracks

19 clubs 101,102,103,104,105 microphones

One embodiment of the present of invention (with the embodiment 1 that calls in the following text) be golf short range ball hitting practive apparatus totally be shown in Fig. 1.In the golf short range ball hitting practive apparatus of present embodiment, shield as target, what use is to tighten the thin screen 12 that is made of cloth or resin or its composite on fixing on the foursquare framework 11 roughly being, in thin screen 12, also contain reinforcing materials (wire or netted) such as metal wire, glass fibre, charcoal fiber.The size of target screen (thin screen main part) is about 1-2m ²,, can use the drawing material, pipe etc. (consider the relation of operation, the aluminum pipe that operating weight is light suits) of aluminium and steel as framework 11.By suitably adjusting the material and the tension force of this thin screen 12, can absorb the repertoire of the ball 17 that hits thin screen 12, thus can make ball 17 fall basically thin screen under.

Below, describe a formation example that approaches screen 12 and framework 11 in detail with reference to Fig. 8-Figure 11.As shown in Figure 8, on the top of thin screen 12, the total length of broad ways will approach the screen upper end and make or bonding pouch, and upper bars 121 is penetrated in this bag.The slightly narrow skirt shape portion 13 of width is formed at the bottom of thin screen 12.Boundary section in thin screen 12 main parts and skirt shape portion 13, utilization approaches screen 12 and sews up or bonding lining cloth (plastic tab etc. with it, though which type of thin slice can) 123 equally with the upper end form the bag shape spaces that broad ways is extended, bottom rod 122 is penetrated its inside.Bottom rod 122 slightly stretches out to the left and right than thin screen 12 main bodys and skirt shape portion 13, and the back side in skirt shape portion 13 is only approaching sponge 125 fixing (bonding) screen 12(skirt shape portion 13 in bottom 126) on.

Framework 11 is that upper beam 111, left and right pillar 112 and leg 113 constitute by aluminium drawing material as shown in Figure 9.The cross section of upper beam 111 as shown in figure 11.The upper bars 121 that is fixed on thin screen 12 tops is assembled in the designated space 111a interior (this space 111a is along the total length setting of above-mentioned crossbeam 111) of upper beam 111, with this thin screen 12 is suspended on the upper beam 111.

As shown in figure 10, in the present embodiment, left and right pillar 112 uses identical parts with upper beam 111, when using as upper beam 111, the limit, the left and right sides of thin screen 12 is assembled to the space 112b(slit of the thin screen 12 of suspension) in.The narrowed width of the inlet 112c of this slit 112b, only slightly wideer than the thickness of thin screen 12, but inner width can make thin screen 12 be corrugated completely, and the left and right end portions of bottom rod 122 (outstanding part from about thin screen 12 and the skirt shape portion 13) is inserted in other space 112d(slot that the inside of left and right pillar 112 is provided with) in.Because this slot 112d is provided with along the total length of left and right pillar 112, so bottom rod 122 can move easy on and off.

Utilize above structure, when ball 17 and 12 collisions of thin screen, can move up along slot 112d,, almost can absorb the repertoire of ball 17 so thin screen 12 can be rearward crooked owing to be positioned at the bottom rod 122 that approaches screen main body lower end.Like this, ball 17 just fall basically thin screen under.Therefore, just do not make ball 17 return and cause injured danger to player's direction at a high speed.And, thin screen 12 during except ball 17 collisions, be the plane state of tightening at ordinary times, so, can carry out the correct target exercise of hitting in the situations such as target of having described score usefulness.In addition, when the strength of the collision of ball 17 was very strong, the right and left of thin screen 12 was drawn to central authorities, the limit, the left and right sides of thin screen 12 might pull out from slit 112b, but, in the left and right pillar 112 of present embodiment, because the inlet of slit 112b is narrow, inner wide, at the narrow part 112c place of slit 112b inlet, thin screen 12 can not be corrugated, can only wide part be corrugated in inside, so this is the effect that undulatory part has chock, can prevent from from slit 112b, to pull out.Therefore, wish that the width of slit 112b inside is the width of corrugated part greater than thin screen 12.

Fallen ball 17 is at first absorbed drop energy by sponge 125, thereby big spring can not take place, and, as shown in Figure 1, the lower end 13 of the thin screen 12 by will constituting target screen prolongs to the front, can return automatically to the place of playing ball and come, therefore, can reclaim golf effectively.In addition, also the thin screen 12 that can target not shielded directly prolongs to downside, and the thin screen (mechanism) of foldback ball is installed in addition.As shown in Figure 7, also can the receipts ball frame 20 that narrow down to the place of playing ball be set from the Bao Ping lower end of target screen.At this moment, be fixed on the lower end of framework 11, can prevent that ball 17 from escaping, simultaneously, can also obtain to receive the effect that ball frame 20 is fixing and support oneself by receiving end that ball frame 20 shields a side near targets.In Fig. 1 and Fig. 7, after being illustrated in the place of playing ball and playing ball with two-dot chain line, get to the track 18 that turns back to the ball 17 of playing ball a little on the target screen again.

The same with the principle that detects the hypocentral location, by minimum three vibrating detectors (voice detector) that are provided with, can detect ball and beat point on target screen, but, in the golf short range ball hitting practive apparatus of present embodiment, in order to revise the variation of the velocity of sound, having used four (101-104) voice detectors is microphone.Four microphones are separately positioned on four angles of framework 11, be used for detecting take place when ball 17 hits the thin screen 12 of target screen from air, propagate the collision sound of coming.Each microphone 101-104 is connected with controller 14, the moment when controller 14 detects the signal that receives the collision sound that each microphone 101-104 detects.

The place of playing ball at the mat 16 of spreading chinampa also is provided with 1 microphone 105, the sound when being used for detecting club 19 strike balls 17.This signal equally also sends controller 14 to, detects this moment.

Display unit such as CRT, LCD 15 is connected with controller 14, carries out result's (the described judged result in back, score, indication etc.) that various parsings obtain and be presented on the image of this display unit 15 in controller 14, immediately informs the player after playing ball.

Fig. 2 is the various tracks of the ball that changes with employed club 19 specifications and play of expression, and as seen from the figure, the flying distance of ball is not only to be determined uniquely by the height that hits the target screen, also with getting angle and the speed of playing ball changes.Therefore, in the golf short range ball hitting practive apparatus of present embodiment, the first coordinate of the point that hits according to ball on the target screen 12 and be carved into Time Calculation ball 17 between the moment of hitting target screen 12 when playing ball and hit track before the target screen 12, then, calculate following pick-up point, falling speed and the whereabouts angle etc. of ball 17 again according to it.And then, by being set in the drop energy and the resistance to rolling of the ball 17 under this falling speed, whereabouts angle and the condition constantly that falls, calculate the distance that down backward ball 17 rolls.About these computational methods, the back describes in detail.

The circuit structure of controller 14 is shown in Fig. 3.The impact sound tone Detector is wave filter and the amplifier 106-109 that the signal of four little device 101-104 at first passes through setting respectively.By the filtering of wave filter, can from the signal of microphone 101-104, remove compositions such as noise on every side, only take out the signal of the collision sound of appointment.Signal by wave filter and amplifier 106-109 is divided into two parts, these four signals is brought together to send on the one hand to arrive testing circuit 132, detects collision sound the earliest at this place.This signal sends data storage 133 to by data storage control circuit 134.The voice signal of playing ball that sends from the microphone 105 of playing ball a little equally also sends the testing circuit 141 constantly of playing ball to by wave filter and amplifier 130 etc., detect the sound of playing ball at this place, and send data storage control circuit 134 to, the signal of four microphone 101-104 around the target screen 12 also sends A/D converter 131 to, according to the signal of data storage control circuit 134, only the certain hour before and after ball 17 arrives is write entry data memory 133 after the detection signal of each microphone 101-104 is carried out the A/D conversion respectively.

Each collides the data of sound and is read by MPU circuit (comprising microprocessor, ROM, RAM, oscillating circuit, decoder etc.) 135, in order correctly to obtain the time of advent, after the waveform according to the collision sound of the vibration of complexity carries out preliminary treatment, carry out track etc. and the described various data computing in back and the judgement of ball 17.Result's (estimate, must grade) that MPU circuit 135 will carry out after these calculating sends output circuit 136 to, and output circuit 136 from various output devices 138 outputs such as monitor, printer, speech synthesizing device, is informed the player with these results.Be provided with on the casing of controller 14 and be used for conversion and input data various keys and the switch 139 used that the player carries out the described various patterns in back, these input instructions send MPU circuit 135 to by input circuit 137.

Secondly, explanation is hit the collision sound that target shielded at 12 o'clock by detecting ball 17, calculates the method for the position of collision of ball 17 on target screen 12 and the computational methods of the deviation of the spread speed that causes in order to the variation of temperature of modifying factor sound wave propagation medium (at this moment being air).Be simplified illustration, the length of side of establishing each limit of target screen 12 is 1, and, the air drag when disregarding ball 17 flights.

Detect the target screen and go up the position of collision of ball:

As shown in figure 14, four jiaos coordinate establishing square target screen 12 is respectively (S1(0,0), S2(0,1), S3(1,1), S4(1,0) and, the coordinate of establishing the position of collision of ball 17 is P(X, Y).And the distance of establishing from a P to four jiaos of S1-S4 is respectively L1-L4.As mentioned above, be provided with microphone 101-104 as the impact sound tone Detector at four jiaos of S1-S4.Here, convenient for subsequent calculations, establish collision sound and be delivered among four microphone 101-104 that S1-S4 is provided with certain from nearest microphonic (shortest time time of a P from a P.This can not directly measure) to, establish from this moment (collision sound arrive the microphonic moment the earliest) and distinguish t1 to the time that collision sound reaches four microphone 101-104, t2, t3, t4(therefore, at t1, t2, t3, having 1 among the t4 at least is 0).

According to above relation, for L1-L4, following various establishment.That is:

L1 ²＝X ²+Y ²＝C ²·（t0+t1） ²…（1）

L2 ²＝X ²+（Y-1） ²＝C ²·（t0+t2） ²…（2）

L3 ²＝（X-1） ²+（Y-1） ²＝C ²·（t0+t3） ²…（3）

L4 ²＝（X-1） ²+Y ²＝C ²·（t0+t4） ²…（4）

Wherein, C is the velocity of sound.Deduct (4) formula from (1) formula, can get X is X={C ²(t0+t1) ²-C ²(t0+t4) ²+ 1}/2 ... (5)

Deduct (3) formula from (4) formula, can get Y and be

Y＝{C ²·（t0+t1） ²-C ²·（t0+t2） ²+1}/2 …（6）

(5) contain the unknown number C(velocity of sound in formula and (6) formula) and t0, so, these values asked below.

At first, according to (1)-(4) formula, because

（L1 ²+L3 ²）-（L2 ²+L4 ²）＝0

Relation set up, so, have

C ²·{2·t0·（t1-t2+t3-t4）+t1 ²-t2 ²+t3 ²-t4 ²}＝0 …（7）

Here, because C ²＞0, so, between t0-t4, following relation is arranged:

2·t0·（t1-t2+t3-t4）+t1 ²-t2 ²+t3 ²-t4 ²＝0 …（8）

Below, in (8) formula, consider two kinds of situations of t1-t2+t3-t4 ≠ 0 and t1-t2+t3-t4=0 respectively.

I .t1-t2+t3-t4 ≠ 0 o'clock

Here, by (8) Shi Kede

t0＝-（t1 ²-t2 ²+t3 ²-t4 ²/{2·（t1-t2+t3-t4）} …（9）

Make t0+ti=Ti(i=1,2,3,4), with (5), (6) formula substitution (1) formula, then

C ⁴·{T1 ⁴+T3 ⁴-2·T2 ²·（T1 ²-T2 ²+T3 ²）}-2·C ²·（T1 ²+T3 ²）+2＝0 …（10）

Here, if order

a＝T1 ⁴+T3 ⁴-2·T2 ²·（T1 ²-T2 ²+T3 ²）

b＝-（T1 ²+T3 ²）

The quadratic equation that can represent of (10) formula then:

a·（C ²） ²+2·b·C ²+2＝0 …（101）

Because of C ²＞0, Ti＞0, so, quadratic equation (101) separate C ²For

C ²＝{-b-（b ²-2·a） ^1/2｝/a

Therefore,

C ²＝[（T1 ²+T3 ²）-{（T1 ²+T3 ²） ²-2·（T1 ⁴+T3 ⁴-2·T2 ²·（T1 ²-T2 ²+T3 ²））} ^1/2]/{T1 ⁴+T3 ⁴-2·T2 ²·（T1 ²-T2 ²+T3 ²）} ……（11）

Because Ti is directly proportional with distance (Li) between P and the Si, so, the same with the situation of above-mentioned (7) formula, following relation is arranged:

T1 ²+T3 ²＝T2 ²+T4 ²

Utilize this formula arrangement (11) formula, can get

C ²＝[-{4·（T1 ²+T3 ²） ²-（T1 ²-T3 ²） ²} ^1/2+T1 ²+T3 ²]/{T1 ⁴+T3 ⁴-2·T2 ²·T4 ²} …（12）

(wherein, t1-t2+t3-t4 ≠ 0)

So, by t0 that will obtain by (9) formula and the C that obtains by (12) formula ²Substitution (5) formula and (6) formula can be obtained the coordinate x of the point of impingement of ball 17 on target screen 12, y.

II. in (8) formula during t1-t2+t3-t4=0

At this moment, consider (t1=t2,, t3=t4) or (t1=t4, situation t2=t3).This is further divided into following situation:

II-1, t1=t2 are when t3-t4 and t1 ≠ t4, t2 ≠ t3

At this moment, because except the center of some P(but target screen 12) on by the center of target screen 12 straight line parallel, so the establishment of following relationship formula with X-axis:

Y＝0.5

L1 ²＝L2 ²＝X ²+（0.5） ²＝C ²·（t0+t1） ²…（13）

L3 ²＝L4 ²＝（X-1） ²+（0.5） ²＝C ²·（t0+t4） ²…（14）

Now, because unknown number has four, i.e. the C(velocity of sound), t0(collision sound arrives the propagation time from the nearest angle Si of striking point P) and, X, the coordinate of Y(striking point P), so, can not try to achieve this four unknown numbers from above-mentioned three formulas.Therefore, for the C(velocity of sound) the standard velocity of sound (seeing natural sciences handbook etc.) when using the value obtained in the situation of above-mentioned t1-t2+t3=t4 ≠ 0 or 25 ℃.

Like this, by (13) formula and (14) formula, can get

X＝±{4·C ²·（t0+t1） ²-1} ^1/2/2 …（15）

Because X 〉=0, and be real number, so, real separate for

X＝+{4·C ²·（t0+t1） ²-1} ^1/2/2

Its substitution (13) formula, through arrangement, then

4·C·tO ²·{C ²·（t1-t4） ²-1}+4·C ²·t0·（t1+t4）·{C ²·（t1-t4） ²-1}+{C ²·（t1-t4） ²-1} ²+4·{C ²·（t1-t4） ²-1}C ²·t1·t4+1＝0

In following formula, make [C ²(t1-t4) ²+ 1]=and A, t0 is found the solution,

Can get

t0＝{-（t1+t4）+（A-1） ^1/2/（C ²·A） ^1/2}/2

With this formula substitution (15) formula, t1-t4＞0 o'clock,

X＝{（1-A ²） ^1/2+A ^1/2}/（2·A ^1/2）

T1-t4＜0 o'clock,

X＝{（1-A ²） ^1/2-A ^1/2}/（2·A ^1/2）

In addition, as mentioned above, y=0.5

II-2, t1=t4 are when t3=t2 and t1 ≠ t3, t2 ≠ t4

This is right, except the center of striking point P(but target screen) on the straight line of center by the target screen and y axle equality.

The same with the situation of II-1, with the C(velocity of sound) handle as datum, can obtain t0 and y by following way.

Make C ²(t1-t2) ²-1]=and A, can get

t0＝{-（t1+t2）+（A-1） ^1/2/（C ²·A） ^1/2}/2

When t1-t2＞0, can get

Y＝{（1-A ²） ^1/2+A ^1/2}/（2·A ^1/2）

When t1-t2＜0, can get

Y＝{（1-A ²） ^1/2-A ^1/2}/（2·A ^1/2）

In addition, as mentioned above, x=0.5.

During III-3.t1=t2=t3=t4

At this moment, point of impingement P is exactly the center of target screen 12, promptly

x＝0.5

y＝0.5

So, can obtain the coordinate P(x of the position of collision of ball 17 on target screen 12 for all situations, y).With this coordinate scale value P(x, y) position with the target of the concentric circles of describing on target screen 12 in advance compares, can judge ball 17 hit which position of target (be the center or around circle in), thereby can carry out the calculating of score.These calculating are undertaken by MPU circuit 135.

Secondly, establishing certain earliest detection among four microphone 101-104 is TOO to moment of collision sound, and then ball 17 collision targets shield 12 moment TO and are

TO＝TOO-tO

But during t1=t2=t3=t4, the acoustic velocity value when utilizing value that t1-t2+t3-t4 ≠ 0 o'clock obtains or 25 ℃ is as velocity of sound C, and then TO can be expressed as

TO＝TOO-2 ^1/2（2·C）

Calculate the track of the ball of being beaten:

The variable regulation of using in the calculating below is as follows

θ: ball get angle;

Tf: the time of being got collision target screen from ball;

LO: from the distance of playing ball and a little shielding to target;

X: the target screen is gone up the point of impingement P(x of ball, the coordinate values of horizontal direction y);

Y: the target screen is gone up the point of impingement P(x of ball, the coordinate values of vertical direction y);

VO: the speed of getting (initial velocity) of ball;

TO: the ball of being beaten arrives the moment (establishing the moment of playing ball is 0) of target screen;

Ls: from the detection of playing ball a little microphonic distance of usefulness constantly of playing ball;

Hg: play ball a little and fall difference in height between the impact point;

Ts: the sound detection of playing ball is (establishing the moment of playing ball is 0) constantly;

G: acceleration of gravity

In above-mentioned variable, also can actual measurement when establishing the mat 16 in the target screen 12 and the place of playing ball from the distance L O of the target screen of playing ball a little, but, the best way be predesignate standard distance (for example, between 2-4m, use the interval determination normal place of 50m), the mat 16 that the distance setting of being selected wherein to like by the player is played ball the place utilizes button or key etc. to carry out once-through operation and specifies selected distance.In addition, can also range sensor a little be set playing ball, utilize the distance of this sensor measurement, automatically send range data to controller to target screen 12.

According to the equation of motion, at moment t, ball is respectively in the position of x direction (heading of ball) and y direction (short transverse)

x＝（V0·cosθ）·t …（16）

y＝（V0·sinθ）·t-g·t ²/2 …（17）

In addition, at moment t, ball is respectively along the speed of x direction and y direction

Vx＝V0·cosθ …（18）

Vy＝V0·sinθ-g·t …（19）

At first, according to ball 17 play ball sound transmission to the moment Ts that is positioned at the microphone 105 of playing ball a little, from the position of playing ball to the flight time Tf that the moment TO of the distance L s of microphone 105 and ball 17 collision targets screens 12 asks ball 17, then have

Tf＝T0-Ts+Ls/C

In addition, very little owing to the speed of ball 17 is compared with the velocity of sound, so the sonic velocity change that temperature causes (being about 0.6m/sec/ ℃) can be disregarded.

Secondly, be the target screen 12 of L0 to get the ball 17 that angle θ and initial velocity V0 get through arriving behind the flight time Tf from the horizontal range of playing ball a little, so, the following formula establishment.That is,

L0＝V0·Tf·cosθ …（20）

Vertically have equally

Y＝（V0·sinθ）·Tf-g·Tf ²/2 …（21）

By (20) formula and (21) formula, can be in the hope of getting angle θ

θ＝atan{（1/2）·（2·Y+g·Tf ²）/LO} …（22）

In addition, with (22) formula substitution (20) formula, can get initial velocity V0 and be

V0＝（1/2）·{4·L0 ²+4·Y ²+4·Y·g·Tf ²+g ²·Tf ⁴} ^1/2/Tf …（23）

Can utilize the flight time Tf and the y(of ball 17 is the height of point of impingement P on the target screen of obtaining previously 12) obtain.

Below, with (22) formula and the equation of motion of (23) formula substitution about the position of vertical direction, the flying height H that can obtain ball 17 is

H＝（T/2）·（2·Y-g·Tf ²-g·T·Tf）/Tf

When ball 17 fall and a little the difference in height of playing ball be Hg grass bang when going up, make H=Hg, then can obtain flight time Ta and be

Ta＝{2·Y+g·T0 ²+（4·Y ²+4·Y·g·T0 ²+g ²·T0 ⁴-8·g·Hg·T0 ²） ^1/2/（2·g·T0） …（24）

With the equation of motion (16) formula of the Ta that tries to achieve like this and (22) formula and (23) substitution horizontal direction, the flying distance Lf that can obtain ball 17 is

Lf＝V0·Ta·cosθ …（25）

Reach height Ym in order to ask to be up to, the moment Tm that the speed Vy of elder generation's calculating vertical direction equals 0 then has

Vy＝V0·sinθ-g·t

V0·sinθ-g·Tm＝0

Tm＝（V0·sinθ）/g

Its substitution (21) formula, can get

Ym＝（V0 ²·sin ²θ）/（2·g）

So, make and all calculated the flight track of ball 17 after playing ball.MPU circuit 135 by output circuit 136, shows this track by state shown in Figure 2 on display unit 15 after calculating these tracks.At this moment, the position of display target screen 12 shows also that simultaneously supposition does not have target to shield 12 o'clock imaginary track thereafter certainly.

The motion of ball after calculating lands:

In fact, when ball 17 is taken to the greenwood on the level ground, bounce for several times repeatedly after, after rolling on the lawn, just stopping.At this moment, change, and the lawn state at each falling sphere point place all has small variation owing to give the kind of the kind of the amount of ball 17 backspins with club, ball and play etc., so, can not correctly calculate spring and rolling distance.But, calculate by using falling speed, whereabouts angle, the quality coefficient of ball, the hardness on lawn and the resistance to rolling on lawn etc., can will descend the motion simulation of backward ball must be similar to reality.Below, provide a this example calculation that falls behind the motion of ball down of simulation.

At first, ask the whereabouts angle θ f when landing and the speed Vx of horizontal direction.The angle θ t of the direction of motion of expression ball 17 can utilize the vertical component Vy of speed and horizontal component Vx to be expressed as

tgθt＝Vy/Vx

The time T a and the speed Vx(of x direction when landing is present with ball 17, owing to disregard the influence of air drag, so Vx always equals initial velocity V0) the substitution following formula, the whereabouts angle θ f in the time of can landing is

tanθf＝{V0·sinθ-g·Ta}/（V0·cosθ）

θf＝atan{tanθ-g·Ta/（V0·cosθ）}

When ball 17 lands, sponge its a part of kinetic energy in the lawn owing to imbedding, still, the degree of absorption changes with " hardness " on lawn and whereabouts angle θ f etc.Therefore, " hardness " of representing the lawn with energy absorption coefficient A.In addition, when in fact ball 17 is fallen on the lawn, after the spring for several times, after rolling on the lawn, just stop then repeatedly, still, become rolling movement immediately after supposition lands in this device, and, the speed Vg of horizontal direction when rolling beginning with the following formula approximate representation earlier.That is,

Vg＝V0·cosθ·（cos ²θf+A·sin ²θf） ^1/2…（26）

Then, resistance to rolling R and (25) formula substitution are had the equation of motion of the object of negative constant acceleration, ask rolling speed Vr to become 0(and stop) time time T r, then have

Vr＝Vg-R·Tr＝0

Tr＝Vg/R

Then with R and (25) formula, (26) formula substitution represents to have the equation of motion of displacement of the object of negative constant acceleration, and the rolling distance Lr that can obtain ball is

Lr＝Vg·Tr-R·Tr ²/2

The initial point (lower left corner S1) of aforementioned calculation supposition target screen 12 is in a little identical height of playing ball and carries out, and still, when reality was used this device, it is some that target screen 12 is a little exceeded than playing ball.Like this play ball a little and target screen 12 between side view when difference of height is set be shown in Fig. 5.At this moment, as shown in Figure 5, calculate the information of employed height and must on the position Y that hits short transverse a little of ball 17, add the height Y that target screen 12 is raise.

In addition, all to be supposition play ball a little and target shields the situation of flying in the vertical plane at 12 center comprising calculating formula before this, and under the situation of the flight track left and right deviation of ball 17, and the horizontal range L01 that shields the point of impingement P on 12 from the target of playing ball a little is

L01＝{L0 ²+（X-0.5） ²} ^1/2

In order correctly to calculate the flying distance of ball 17, the calculating formula before must revising.

But, short range ball hitting practive apparatus as golf, show when playing ball as a result, for the practitioner, play ball and the air line distance in setting point is represented flying distance with being connected with it, represent that not as using flying distance is several meters with the coordinate system of the line formation of the straight line quadrature of the center line 61 that is parallel to target screen 12, depart from several meters left, in addition, before target several meters, depart from several meters to the right and be more readily understood.Therefore, in this device, flying distance represents with Lf that full rolling distance is represented with Lr, and ball 17 is represented with Lf+Lr to the distance of stop position.

Secondly, as shown in Figure 6, skew Xf has following relation about the relative center line in position, whereabouts of ball:

Lf/L0＝Xf/（x-0.5）

So, can get

Xf＝[Lf·（X-0.5）]/L0

The ball that can fly equally, falls behind the position skew Xa that rolls after stopping for 17 times

Xa＝[（Lf+Lr）·（X-0.5）]/L0

In addition, Xa is timing, and expression is skew to the right, and when Xa was negative, expression is skew left.

In order to improve golf technology, can accomplish at short notice, still, must adhere to swinging the exercise of club every day.But every day, exercise was very dull, and the player also is sick of, and can not adhere to for a long time.As mentioned above, when using this ball hitting practive apparatus as the short range ball hitting practive apparatus of golf, hit the data that adopt according to 1 time and carry out above-mentioned various calculating, and these results (are for example shown with various forms, track such as Fig. 2 with ball, Fig. 5 and shown in Figure 6 on display unit 15, showing like that, perhaps the position of the point of impingement on the target screen 12 with the target of describing on target shields shown in Figure 1 compared, put on mark and carry out the score demonstration), even every day, exercise can be sick of yet.And, because ball 17 that uses and club 19 all are actual things, so, can carry out the exercise of the short range batting state of very approaching reality.In addition, on one side since the club that gets out get back to the player naturally and come, so, need not reach ball 17 at every turn and just can repeatedly bat continuously, can practise effectively.

Below, the golf short range ball hitting practive apparatus of other embodiments of the invention (hereinafter referred to as embodiment 2) is described.The integral body of the golf short range ball hitting practive apparatus of present embodiment is identical with the structure of the foregoing description 1 shown in Figure 1, the circuit structure of controller 14 also substantially the same (as described later, the circuit structure of controller 14 has some differences because of the computational methods of position of collision are different) with the structure of embodiment 1 shown in Figure 3.Present embodiment is different with embodiment 1 by detecting aspect the method that collision sound that ball 17 collision targets shielded 12 o'clock calculates the position of collision of ball 17 on target screen 12.Below, the computational methods of the position of collision of present embodiment are described with reference to Figure 12-Figure 14.Be simplified illustration, establish microphone 101-104 and be positioned at four jiaos that target shields, the air drag when disregarding ball 17 motions.

Detect the target screen and go up the position of collision of ball:

As shown in figure 13, the coordinate of establishing four angles of rectangle target screen 12 is respectively S1(0,0), S2(0, My), S3(Mx, My), and S4(Mx, 0), the coordinate of establishing the position of collision of ball 17 is P(x, y).And, establish from the distance of the S1-S4 at P to four angle and be respectively L1-L4.The same with embodiment on four angle S1-S4, be provided with microphone 101-104(as the impact sound tone Detector referring to Fig. 1).This measurement device collision sound arrives each microphonic moment.If collision sound arrives each microphonic moment and is respectively ta1, ta2, ta3, ta4.

In order to make the point of impingement, as long as known from the microphonic distance more than the point of impingement to three just passable.Below, illustrate that with microphone 101 be benchmark, and use is clipped in it three microphonic situations such as central microphone 102 and microphone 104.

After if ball 17 collides with target screen 12, the time (with " the collision sound time of advent " of calling in the following text) that is arrived microphone 101 by the collision sound of collision generation is can not directly measure this time of t0(), the difference of collision sound time of advent of microphone 101 and microphone 102 is t2, the difference of collision sound time of advent of microphone 101 and microphone 104 is t4, then has

t2＝ta2-ta1 …（27）

t4＝ta4-ta1 …（28）

For with above-mentioned time t0, the reference axis that t2, t4 are transformed on the target screen 12 is a distance, needs to use the velocity of sound.Velocity of sound C changes with temperature T, can obtain promptly by following formula,

C＝331.5+0.6·T …（29）

About the details of the velocity of sound, the back narration.

Utilize above-mentioned velocity of sound C, then distance L 0(=L1 from position (point of impingement) P of ball 17 collision on target screen 12 to microphone 101), L0 and difference Lt2, the L0 of L2 and the difference Lt4 of Lt4 can be expressed as respectively

L0＝t0·C …（30）

Lt2＝t2·C …（31）

Lt4＝t4·C …（32）

Point of impingement P(x among Figure 13, y) with above-mentioned (30) formula, (31) formula, (32) formula relation can be expressed as

X ²+Y ²＝L0 ²…（33）

（Mx-X） ²+Y ²＝（L0+Lt4） ²…（34）

X ²+（My-Y） ²＝（L0+Lt2） ²…（35）

Can calculate x by above-mentioned three formulas, y, L0 is respectively

X＝（Mx ²-2·L0·Lt4+Lt4 ²）/（2·Mx） …（36）

Y＝（My ²-2·L0·Lt2+Lt2 ²）/（2·My） …（37）

L0＝[{B4·B2·（B2+B4+2·Lt2·Lt4）} ^1/2-（B4·Lt4·My ²+B2·Lt2·Mx ²）]/{2·（B2·Mx ²+B4·My ²-Mx·My）} …（38）

Perhaps

L0＝[-{B4·B2·（B2+B4+2·Lt2·Lt4）} ^1/2-（B4·Lt4·My ²+B2·Lt2·Mx ²）]/{2·（B2·Mx ²+B4·My ²-Mx·My）} …（39）

Wherein,

B2＝My ²-Lt2 ²

B4＝Mx ²-Lt4 ²

L0 has two to separate, and still, point of impingement P is positioned at S1, and S2, S3, S4 are within the rectangle on summit the time, and (38) formula is the distance of point of impingement P to S1.For other situation, describe in detail later on.Improve the method for precision and reliability:

The measured value that uses in the aforementioned calculation method (collision sound due in) is three, i.e. ta1, ta2, ta4.Here, re-use another measured value ta3,, y), can obtain four with four kinds of methods and separate, ask these four mean values of separating just can reduce error, improve precision for point of impingement P(x.

In addition, these four separated compare,,, then predicated certain and measured mistake,, can improve reliability by carrying out abnormality processing if greater than setting value as long as their difference is exactly normal in a certain range of set value.

Measure velocity of sound C:

As mentioned above, in order to calculate the position of collision of ball 17, need to use the numerical value of the aerial spread speed of collision sound (velocity of sound) that is produced.When not requiring high accuracy or temperature one regularly, can use the predefined velocity of sound to calculate position of collision.When temperature Change is big or when requiring high accuracy, must measure the velocity of sound or temperature.Below, as the method for asking the velocity of sound, the method for using thermistor equitemperature sensor is described and analyzes the method for the data that obtain from the microphone more than four that is provided with.

(1) method of use thermistor equitemperature sensor

This method is to measure temperature T's by for example increase temperature sensing circuit shown in Figure 12 in the circuit structure of controller shown in Figure 3 14.At this moment, the output signal of the thermistor 152 of detected temperatures flows to A/D converter 156 after amplifier 154 amplifies.After the signal value of input A/D converter 156 is transformed to data signal, input MPU circuit 135.So, after MPU circuit 135 obtains temperature T, utilize

The C=331.5+0.6T(meter per second)

Calculate velocity of sound C.In addition, example shown in Figure 12 is that the detection signal with temperature T carries out input MPU circuit after the A/D conversion, still, and in addition, it is also conceivable that and carry out voltage/frequency conversion and voltage/pulse width conversion, analog signal is directly imported a lot of methods such as MPU circuit.When analog signal is directly exported the MPU circuit,,, just can obtain the digital value of temperature T by measuring frequency and pulse width for example according to the sequential monitoring input signal.

(2) analyze the method for the data that obtain from the microphone more than four that is provided with

Consider shown in Figure 13 microphonic situation to be set at four angle S1-S4, at this moment, point of impingement P(x, y) and the coordinate S1(0 at microphonic four angles is set, 0), S2(0, My), S3(Mx, My), S4(Mx, 0) between, following relational expression is set up.

That is,

L1 ²＝X ²+Y ²…（40）

L2 ²＝X ²+（Y-My） ²…（41）

L3 ²＝（X-Mx） ²+（Y-My） ²…（42）

L4 ²＝（X-Mx） ²+Y ²…（43）

Wherein, Li(i=1-4) be to each microphonic distance from the point of impingement.In addition, utilize the velocity of sound and time representation they, then have

L1 ²＝C ²·（t0+t1） ²…（44）

L2 ²＝C ²·（t0+t2） ²…（45）

L3 ²＝C ²·（t0+t3） ²…（46）

L4 ²＝C ²·（t0+t4） ²…（47）

Wherein, t0 be from collision sound beginning arrive time (the collision sound time of advent) till the benchmark microphone, ti(i=1～4 to collision sound) be constantly poor of detection that detection that the benchmark microphone detects collision sound detects collision sound with each microphone constantly.

By (40) formula-(47) formula, can get

2·t0·（t1-t2+t3-t4）+t1 ²-t2 ²+t3 ²-t4 ²＝0 t0＝-（t1 ²-t2 ²+t3 ²-t4 ²）/{2·（t1-t2+t3-t4）} …（48）

Here, oversimplify order in order to make expression formula

T1＝t0+t1

T2＝t0+t2

T3＝t0+t3

T4＝t0+t4

So,, can get by (40) formula-(47) formula

{（T4 ²-T1 ²）·Mx ²-（T2 ²-T1 ²）·My ²}·C ⁴-2·My ²·Mx ²·（T4 ²+T2 ²）·C ²+Mx ²·My ²·（Mx ²+My ²）＝0 …（49）

Order

a＝（T4 ²-T1 ²）·Mx ²-（T2 ²-T1 ²）·My ²

b＝My ²·Mx ²·（T4 ²+T2 ²）

c＝Mx ²·My ²·（Mx ²+My ²）

Then following formula can be expressed as quadratic equation:

a·（C ²） ²-2·b·（C ²）+c＝0 …（50）

By C ²＞0, Ti＞0 can get

C ²＝{b-（b ²-a·c） ^1/2}/a

By C＞0,

C＝[{b-（b ²-a·c） ^1/2}/a] ^1/2

Sometimes, because the relation between the position of collision of microphonic allocation position and ball can not be calculated the velocity of sound.For example, at tal=ta2, tal=ta4, ta3=ta2, during some establishment in the condition of ta3=ta4, the denominator 2(t1-t2+t3-t4 of (48) formula) just equal 0, just can not calculate.At this moment, just with temperature the velocity of sound C that obtains before not taking place sharply to become replaces.In contrast, use the method for said temperature sensor, can irrespectively obtain velocity of sound C with position of collision, so, more favourable than this method on the one hand at this.

As mentioned above, calculate velocity of sound C, utilize (31), (32), (38), (39) formula is obtained Lt2, Lt4, L0, and their substitutions (36) and (37) formula, also can calculate in the present embodiment point of impingement P the position (x, y).And, calculate position of collision (x, y) after, the same with embodiment 1, just can carry out the calculating of the motion of the calculating of track of the ball beaten and the back ball that lands.

So far, as shown in figure 13, although be four angles that each microphone are arranged on target screen 12, it is situation within the rectangle on summit that point of impingement P is positioned at them, still, point of impingement P also can calculate when being positioned at beyond the microphone as shown in Figure 14.Below, the situation that the expanded range of point of impingement P is arrived the rectangle outside of each microphone formation is described.

Separate for two that L0 has (38) formula and (39) formula to provide in the calculating in front.Do not draw in the scope of oblique line in Figure 14, (38) formula of separating that provides L0 is represented point of impingement P, draws in the scope of oblique line in Figure 14, and another (39) formula of separating that provides L0 is represented point of impingement P.Like this,, obtained two values of L0, can not determine point of impingement P uniquely by the calculating that had illustrated in order to the collision detection position.In addition, in calculating in order to the collision detection position, because needed microphonic data (the collision sound detection constantly) are ta1, ta2, ta3, among the ta4 3, so employed microphonic data combination has four kinds, therefore, when carrying out above-mentioned calculating in order to the collision detection position, can obtain eight altogether and separate with four kinds of methods.These eight L0 that must comprise expression point of impingement P more than four in separating.Therefore, if these eight separate in same numerical value have more than four, then this numerical value is exactly the L0 of expression point of impingement P.

As mentioned above, by using four microphones,, can detect as long as the position of point of impingement P is on the plane at microphone place.In addition,, also can be not limited on the plane, and use three-dimensional space coordinates by the microphone more than five is set.

If use by the microphone more than five and detect position in the solid space, then can be unlike shown in Figure 1 microphone 105 a little be set playing ball, also can detect the impact position and the moment of ball.Therefore, utilize this method, not in certain location and play ball, can simulate the motion of ball from position arbitrarily.At this moment, can be shared position of collision detect the microphone of usefulness, also the microphone of getting the position in order to detection can be set in addition.

In addition, because being got the time range that arrives target from ball can roughly imagine, so, behind the data storage control circuit 134 in the signal arrival Fig. 3 of testing circuit 141 outputs that plays ball, in the time of appointment, except the signal of A/D converter 131 outputs, all need not write entry data memory 133.Like this, just, can significantly reduce the misoperation that external noise causes.

The computational methods of the foregoing description 1 and embodiment 2 are an example, in addition, can also use various computational methods.For example, microphonic installation site can be or not four angles of target screen shown in Figure 1, and be installed in the optional position that the position of rhombus or other have been considered the space around the exercise apparatus.At this moment, detect the position of collision P(x of ball, calculating formula y) changes with microphonic configuration.But, at this moment also only needing to change above-mentioned x, the calculating formula of y is just passable, calculates position of collision P(x, and y) afterwards, track calculates and can still be undertaken by the method in the above-mentioned example.

In addition, in the calculating of the foregoing description 1 and embodiment 2, do not consider ball 17 in-flight air drag, still, at the short range square stance, the flying distance of ball 17 is shorter, and the flying speed of ball 17 is also not too big, and the quality of ball 17 is enough big, so, can not ignore aloft air drag.Equally, do not consider in the calculating yet the variation of the sporting flying that the rotation of ball 17 causes and land after braking effect.In addition, the ball of falling on the lawn 17 is absorbed a part of kinetic energy by the lawn, and jumping height little by little reduces, and becomes rolling at last.The resistance to rolling on during rolling because lawn also absorbs kinetic energy, and ball is stopped.Energy absorption when these rotating effects, spring, resistance to rolling etc. are difference with the condition on ball 17 and lawn, but, by in advance in the flying distance of the ball 17 that actual measurement under the representative condition is hit and the rolling distance after landing at first etc., determine the representative value of various parameters, just can consider these factors.Perhaps, these representative values are changed arbitrarily, can carry out calculating with the corresponding track of various conditions by the player.

Consider when indoor this exercise apparatus of use, preferably adopting framework 11 is the modular constructions that are made of pipe, in addition, and for safety, be provided with and draw in the net (certain, mesh should less than ball) between being preferably in target screen and playing ball a little and fixedly draw in the net and the accessory of framework 11 etc.

Device for detecting position of collision of objects of the present invention can detect the position of the collisions such as target of flying body such as ball and appointment, so, be not only limited to the exercise of golf, can also be used for the gunnery practice of various matches and throw exercise and recreation.For example, can be used for batting and high low game, tennis exercise, the throwing exercise of American football and the gunnery practice of plinker etc. of baseball, in addition, as target, also can unlike the foregoing description, prepare special target screen, for example can constitute on original wall the vibrating detector (microphone etc.) more than three being installed.And, constantly during detector, not only can calculate position of collision in the ejaculation with flying bodies such as balls, the track that can also calculate flying body comprises the imaginary track after the collision, so, can carry out the practice stroke of the practice stroke of golf and baseball and tennis exercise etc. very effectively.In addition,, handle, can further carry out the exercise and the recreation of various patterns, thereby can enlarge range of application by increasing various parameters of input and data based on basic function of the present invention.

Claims (8)

1, device for detecting position of collision of objects is characterized in that: have impact sound tone Detector and arithmetic unit, the impact sound tone Detector is arranged on not at least three places on same straight line around the detection range; Arithmetic unit detects the position of collision of objects in the moment calculating detection range of colliding sound according to each impact sound tone Detector.

2, by the described device for detecting position of collision of objects of claim 1, it is characterized in that: also have and penetrate detector and the 2nd arithmetic unit constantly, penetrate detector constantly and be used to detect the moment that the object that bumps penetrates from the place of appointment; The 2nd arithmetic unit detects the moment of collision sound and penetrates the detected ejaculation of time detector constantly according to each impact sound tone Detector, calculating from penetrating the traveling time till the place is penetrated when beginning to object collision, and then is calculated the track of object before the collision and the imaginary track after the collision according to the position of collision of objects that this traveling time and arithmetic unit are calculated from object.

3, ball hitting practive apparatus is characterized in that: have target screen, impact sound tone Detector and arithmetic unit, the target screen constitutes by tightening the thin screen that is fixed on the framework; Around above-mentioned target screen, three impact sound tone Detectors are set at least; Arithmetic unit detects the moment of colliding sound according to each impact sound tone Detector, calculates the position of collision of flying body on the target screen.

4, by the described ball hitting practive apparatus of claim 3, it is characterized in that: also have and penetrate detector and the 2nd arithmetic unit constantly, penetrate the place ahead that moment detector is located at the target screen, be used for inspected object from penetrating the moment that the place is penetrated; The 2nd arithmetic unit is after receiving each impact sound tone Detector and penetrating the detection signal of moment detector, flight time till when the calculating flying body begins to flying body and the collision of target screen from penetrating the place ejaculation, and then according to the position of collision that this flight time and arithmetic unit calculate, calculate with the collision of target screen before the track of flying body and the imaginary track after the collision.

5, by the described ball hitting practive apparatus of claim 4, it is characterized in that: have display, be used to show arithmetic unit or the 2nd arithmetic unit result calculated, be i.e. the position of collision of flying body on the target screen, the track of flying body etc.

6, by the described ball hitting practive apparatus of claim 3-5, it is characterized in that: collision impact point and the get zone of on the thin screen of target screen, describing flying body.

7, by the described ball hitting practive apparatus of claim 3-6, it is characterized in that: flying body is a golf, and penetrating constantly, detector is to detect the voice detector of playing ball that hits the sound of playing ball that sends of golf with club.

8, by the described ball hitting practive apparatus of claim 7, it is characterized in that: the thin screen of target screen extends to the place of playing ball from the lower end of framework, so that can turn back to the place of playing ball with the thin ball that shields after colliding.

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