201043298 六、發明說明： 【發明所屬之技術領域】 本發明係有關-種球棒打擊中心與最小振動點之模合方 法，其具有可達到最有效率之打擊及可依選手習慣調整球棒重 心等優點及功效。 【先前技術】 在棒球運動中’當球棒擊球時，球之動量在經由撞擊後 Ο Ο 傳遞至球棒，使球棒產生振動；當打擊者之擊球點於一最小 振動點時，手部所產生之振輸小；當打擊者之擊球點不在 該最小振動點時，手部會產生衝擊或刺痛，甚至造成傷害。 當然，球棒在擺動揮擊的過程中，球棒重心位置係可產 生最大的擺動力量，因此，當打擊者之擊球祕該球棒重心 時，係可將球擊得最遠。 上 但球棒之重心及擊球之最小振動點通常不在同一位置 激使得打擊者打擊時無法同時達到球棒之最小振動及 擊球距離。 因此，有必要研發新產品，以解決上述缺點 【發明内容】 ^發明之目的在於提供—種球棒打擊中心與最小振動點 j 方法’其兼具可達到最有效率之打擊及可依選手習慣 =整球棒重心等優點及功效，用畴騎擊者打擊時無法同 時達到球棒之最小鷄及最权軸韓等問題。 本發明解決上述間題之技術手段係提供一種球棒打擊中 201043298 心與最小鶴點之模合方法，其係包括下列步驟： [1] 準備步驟：準備—打擊檢測裝置，其包括： -基座，其係具有—第—植接部； -球棒本體，其係具有打擊部、—握部、—預定空間及 一調整塊部；該握部係具有—第二樞接部，該第二樞接部係 樞接於該第-樞接部上，使該球棒本體鮮於該基座上而垂 ±向下彳a向地一該預定空間係具有—内壁面，而該調整塊 〇 部係可於該預定空間内作-預定距離之移動； 一敲擊裝置，其係肋敲擊該雜本體； -感測裝置，其係設於該球棒本體之握部上，用以量測 該球棒本體經該敲擊襞置敲擊後所產生之振動； [2] 檢測倾：婦該罐塊輕—歉位置，並於該棒 球本體之打擊部上定義複數預定敲擊點，以徽擊裝置逐一 ◎ 對減預定敲擊輯行轉，賊測裝置制複數敲擊點經 4擊後所產生之振動’得到—最小振動點；該最小振動點至 該第二極接部之距離即為_參考長度，而敲擊該最小振動點 時，利用該球棒本體所產生之擺動週期而計算出之擺長，即 為一實際擺長； [3] 判定步驟：該參考長度及該實際擺長之差值，即為一 誤差值，當該誤差值小於一預定值時，即完成打擊中心與最 小振動點之模合，當該誤差值大於一預定值時，則重複進行 該檢測步驟，直至該誤差值小於該預定值，且重複進行之檢 201043298 測步驟，該調整塊部係具有不同之預定位置。 本發明之上述目的與優點，不難從下述所選用實施例之 詳細說明與附圖中，獲得深入瞭解。 茲以下列實施例並配合圖式詳細說明本發明於後： 【實施方式】 本發明係為一種球棒打擊中心與最小振動點之模合方 法，如第一圖所示，其係包括下列步驟·_ [1] 準備步驟51:如第二圖所示，準備一打擊檢測装置， 其包括： 一基座10，其係具有一第一樞接部u ; 一球棒本體20，其係具有打擊部21、一握部22、一預定 空間23及-調整塊部24 ;該握部22係具有-第二樞接部 221，該第二樞接部21係樞接於該第一樞接部11上，使該球 棒本體20懸吊於該基座1〇上而垂直向下指向地心，該預定 空間23係具有一内壁面231，而該調整塊部24係可於該預定 空間23内作一預定距離S之移動； 一敲擊裝置30，其係用以敲擊該球棒本體2〇 ; 一感測裝置40，其係設於該球棒本體20之握部22上， 用以量測該球棒本體2〇經該敲擊裝置3〇縣後所產生之振 動； [2] 檢測步驟52 :調整該調整塊部24至一預定位置，並 於該棒球本體2G之打擊部21上定義複數觀敲擊點211，以 201043298201043298 VI. Description of the Invention: [Technical Field] The present invention relates to a method for molding a bat hitting center and a minimum vibration point, which has the most effective blow and can adjust the center of gravity of the bat according to the player's habit Other advantages and effects. [Prior Art] In baseball, when the bat hits the ball, the momentum of the ball is transmitted to the bat after the impact, causing the bat to vibrate; when the hitter hits the ball at a minimum vibration point, The vibration generated by the hand is small; when the hitter's hitting point is not at the minimum vibration point, the hand may have an impact or sting, or even cause injury. Of course, during the swinging of the bat, the position of the center of gravity of the bat can produce the maximum swinging force. Therefore, when the hitter hits the ball with the center of gravity of the bat, the ball can be hit the farthest. However, the center of gravity of the bat and the minimum vibration point of the shot are usually not in the same position. The shock and the hitting distance of the bat cannot be achieved at the same time. Therefore, it is necessary to develop new products to solve the above-mentioned shortcomings [invention] The purpose of the invention is to provide a method for bat ball striking center and minimum vibration point j, which can achieve the most effective blow and can be used by players. = The advantages and functions of the bat's center of gravity, etc., when the domain rider hits, it is impossible to reach the minimum chicken and the most powerful axis of the bat at the same time. The technical means for solving the above problems provides a method for molding the heart of the 201043298 and the minimum crane point in the bat strike, which comprises the following steps: [1] Preparation step: preparation-strike detection device, which includes: a holder having a first-planting portion; a bat body having a striking portion, a grip portion, a predetermined space, and an adjusting block portion; the grip portion having a second pivoting portion, the The two pivoting portions are pivotally connected to the first pivoting portion, so that the bat body is fresher on the base and the yoke is downwardly 彳a toward the ground, and the predetermined space has an inner wall surface, and the adjusting block 〇 The part can be moved within the predetermined space by a predetermined distance; a tapping device is struck by the rib; the sensing device is attached to the grip of the bat body for measuring Measuring the vibration generated by the bat body after being struck by the tapping device; [2] detecting the tilt: the woman is lightly apologizing, and defining a plurality of predetermined tapping points on the hitting portion of the baseball body, Take the emblem device one by one ◎ to reduce the scheduled tapping, the thief test device makes a complex number of tapping points 4 The vibration generated after the hit 'gets the minimum vibration point; the distance from the minimum vibration point to the second pole is the _ reference length, and when the minimum vibration point is struck, the bat body is generated The pendulum length calculated by the wobble period is an actual pendulum length; [3] the determining step: the difference between the reference length and the actual pendulum length is an error value, when the error value is less than a predetermined value, That is, the simulation of the strike center and the minimum vibration point is completed. When the error value is greater than a predetermined value, the detecting step is repeated until the error value is less than the predetermined value, and the test step 201043298 is repeatedly performed, and the adjustment block is repeated. The department has different predetermined positions. The above objects and advantages of the present invention will be readily understood from the following detailed description and drawings. The present invention will be described in detail below with reference to the following embodiments: [Embodiment] The present invention is a method for molding a bat strike center and a minimum vibration point, as shown in the first figure, which includes the following steps. _ [1] Preparation step 51: As shown in the second figure, a strike detecting device is prepared, comprising: a base 10 having a first pivoting portion u; a bat body 20 having a striking portion 21, a grip portion 22, a predetermined space 23, and an adjusting block portion 24; the grip portion 22 has a second pivoting portion 221, and the second pivoting portion 21 is pivotally connected to the first pivoting portion The bat body 20 is suspended from the pedestal 1 and vertically directed downward toward the center of the earth. The predetermined space 23 has an inner wall surface 231, and the adjusting block portion 24 is available in the predetermined space. 23 is a movement of a predetermined distance S; a striking device 30 is used to strike the bat body 2; a sensing device 40 is attached to the grip 22 of the bat body 20, For measuring the vibration generated by the bat body 2 after passing through the striking device 3; [2] detecting step 52: adjusting the adjusting block portion 24 to a predetermined position, and a plurality of viewing points 211 are defined on the striking portion 21 of the baseball body 2G to 201043298
該敲擊裝置3G逐-對複數歡敲擊點211進行敲擊(如第三 圖所示，假設將該調整塊部24婦至—第—預定位置ρι後， 即以該敲擊裝置30進行複數預定敲擊點211之敲擊）；該感 測，置40量測複數敲擊點211、經敲擊後所產生之振動得到 一最小振動點X;該最小振_ χ至該第二插接部221(即該 球棒本體20擺動之轉軸)之距離即為一參考長度川，而敲擊 該最小振_ X時，糊該轉本體2G所產生之擺動週期τ 而計算出之擺長，即為-實際擺長:如第四圖所示，該球棒本 體2〇經敲雜健生―歡缝Θ之鶴，勤其擺動週期 Τ係可推算出—實際擺長;該實際擺長即為該第二 _部221至球棒本體2Q重心（即打擊中心)之距離； ⑶判定步驟53:該參考長度川及該實際擺長之差值， 時’即完成打 時*小振動點X之模合；當該誤差值L大於一預定值A A曰複進行該檢測步驟，直至該誤差值L小於該預定值 預定位重置錢行德_ 52，_塊__不同之 本體說，調整該調整塊部24之位置，係可使該球棒 可藉由各種^门達到改變；而關於該調整塊部24之移動，係 述，故僅=構變化來達到作動，在此無法一一詳 代表性之組合實施例來說明；如第五及第六圖 201043298 所示，該預定空間23係設有一螺桿60，該内壁面231係具有 -凹槽231A ’而該調整塊部24係設有一可與該螺桿6〇相互 配合之螺紋孔241及-可與該内壁面231之凹槽23U相互配 合之凸《卩242 ’ §轉桿轉動時’係可控制該調整塊部％ 之移動，將其調整至所需之位置。 如第七圖所示，該敲擊裝置30係具有一撞擊部31、磁圈The tapping device 3G taps the plurality of hitting points 211 one by one (as shown in the third figure, assuming that the adjusting block portion 24 is the first to the predetermined position ρι, that is, the tapping device 30 performs a plurality of taps of the predetermined tapping point 211; the sensing, the 40-measurement complex number of tapping points 211, the vibration generated after the tapping to obtain a minimum vibration point X; the minimum vibration__ to the second insertion The distance between the connecting portion 221 (that is, the rotating shaft of the bat body 20) is a reference length, and when the minimum vibration_X is struck, the swing period τ generated by the rotating body 2G is calculated to calculate the swing length. , that is - the actual pendulum length: as shown in the fourth figure, the bat body 2 is smashed by the health-swinging crane, and its swing cycle can be calculated - the actual pendulum length; the actual pendulum length That is, the distance from the second_portion 221 to the center of gravity (ie, the strike center) of the bat body 2Q; (3) the determination step 53: the difference between the reference length and the actual swing length, when the time is completed, the small vibration point is completed. a mode of X; when the error value L is greater than a predetermined value AA, the detecting step is repeated until the error value L is less than the predetermined value For the body of the money _ 52, _ block __ different body, adjust the position of the adjustment block portion 24, so that the bat can be changed by various gates; and regarding the movement of the adjustment block portion 24, As a matter of course, only the configuration change is achieved, and the representative combination embodiment is not described here; as shown in the fifth and sixth figures 201043298, the predetermined space 23 is provided with a screw 60, which is The wall surface 231 has a groove 231A', and the adjusting block portion 24 is provided with a threaded hole 241 which can cooperate with the screw 6〇 and a convex "卩242" which can cooperate with the groove 23U of the inner wall surface 231. § When the lever is rotated, the movement of the adjustment block can be controlled to adjust it to the desired position. As shown in the seventh figure, the striking device 30 has an impact portion 31 and a magnetic ring.
32及-鐵塊33，利用電磁之原理來控織擊部31之作動。 如第八圖所示，關於該檢測步驟52之詳細步驟係如下 所示： 1 [1] 調整步驟521:將該調整塊部24調整至一預定位置· [2] 敲擊步驟522:於該棒球本體20之打擊部21上定義 複數預定敲擊點211，並以該敲擊裝置30逐一對複數預定敵 擊點211進行敲擊； [3] 振動距離量測步驟523 :以感測裝置40量測複數敵 擊點211經敲擊後所產生之振動頻譜，得到該最小振動點X， 並計算該最小振動點X至該第二框接部221之距離，得丨 參考長度d0; [4] 實際擺長計算步驟524 :計算敲擊該最小振動點χ 時該球棒本體20所產生之擺動週期之擺長，即得到一實防攘 長。 如第九Α圖所示，假設將該調整塊部24調整至—第 定位置P1，且該打擊部21係定義有一第---第二、 201043298 一第四及一第五預定敲擊點，211儿、21比、211〇21比、211£， 並以該敲擊裝置30逐一進行敲擊；如第九β圖所示，假設敲 擊該第三預定敲擊點211C所測得之振動最小，則該第三預定 敲擊點211C至該第二樞接點221之距離，即為該參考長度 dO ;而藉由敲擊該第三預定敲擊點2UC時，該球棒本體2〇 所產生擺動週期T ’計算出該實際擺長；假設該預定值係為設 為3公分，當該調整塊部24於該第一預定位置ρι時，該第 〇 二預定敲擊點2ilG為-最小振動點X，且該參考長度fl〇係 為60公分，而該球棒本體2〇之擺動週期係約為丨.6秒，則 利用週期7' = 之公式可知，該實際擺長係約為70公分， 該誤差值L与1〇公分，係超過該預定值A之範圍，因此，需 回復至該檢測步驟52，調整該調整塊部24之預定位置，再進 行破擊(該調整塊部24之預定位置改變後，敲擊所得之最小 ° 振點X位置亦有所變化）、量測等動作，直至誤差值L小於該 預疋值A ’如第十崎示，將該調整塊部24由該第-預定位 置P1調整至-第二預定位置P2，再敲擊該第一、第二、第三、 第四及第五預定敲擊點，211A、21lB、皿、， 測知最小振動點x，並將所得之誤差值l與預定值a再次進 订比對，若該誤差值L小於該預定值A，即完成球棒打擊中心 最】振動點之模合，若該誤差值L仍大於該預定值A，則繼 續重複該檢測步驟52，將該調整塊部％之預定位置再次變更 201043298 後’進行敲擊、量測等動作。 如第十-圖所示’本發明之控制纽係以—處理器、一 顯示器及-輸入鍵盤來達控制及顯示，與各部位之連結係如 下列所示： Ο ❹ [1] 關於該敲擊裝置30,其係以一調整螺桿及一平台來 達到移動，而控制系統之處理器係透過一控制器、一驅動器、 一伺服馬達及-聯軸器來達崎_桿之控制；猶敲擊裝 置30與該處理器間’係以—控制器及一開關來達到控制； [2] 關於該感測裝置4〇’除了可量測敲擊後產生之振動 2亦具有計時之魏，藉此_縣聊之計算；該感測 裝置40係將所測得之信號傳送至一信號放大器，再瘦由一 A/D訊號轉換器（類比數位轉換器）之轉換後傳送至該處理 器’該處理器係將其量測結果顯示於該顯示器。 另外’ _該最小振咖之_，其細檢測出之振 據；假設第十二Α、第十^及第十4圖係分 、—第—及—第三財敲擊點(211Α、_、 當所f叙振驗形，域幅係相為-第-振幅A1、一 -、幅A2及-第三擴㈣，經比較後可知，第十二b圖之 ：卿卿係為 所述本發明之優點及功效歸納為： ⑴可達到最有效率之打擊。傳統球棒之最小振動點與 201043298 重=位置通f不在同—位置上，·，無法兼具最佳擊球與 擊球之舒適感；而本發明利用該調整塊部24之移動，係可得 到該最小振動點X與該球棒之重心最接近之位置，形成一最 佳打擊點’使打擊者不但可將球擊得最遠，且球棒所產生之 振動亦為最小，可制最有效率之打擊。 » [2]可依選手習慣調整球棒重心。傳統球棒無法依選手 〇 之習慣調整球棒重心，選手只能以-支重量及細立置較順 手之球棒來進行打擊；而本發明之調整塊部係可作一預定 距離S之調整，使不同的選手可依本身之習慣，調 塊部⑷_最順手之擺動、揮擊。 調整 以上僅是藉由較佳實施例詳細說明本發明，對於該實施 <〗所做的任何簡單修改與變化，皆不脫離本發明之精神與範 H ° ο β由社詳細說明，可錄知本項祕者明瞭本發明的確 可達成前述目的，實已符合翻法之規定，聽出發明專利 申請。 【圖式簡單說明】 第圖係本發明之球棒打擊中心與最小振動點之模合方 法之示意圖 、0 第二圖係本發明之球棒打擊中心與最小振動點之模 法之打擊檢測裝置之示意圖 、0 第三圖係本發明之球棒打擊中讀最小振動點之模合方 201043298 法之量測最小振動點之示意圖 第四圖係本發明之球棒打擊中心與最小振動點之模合方 法之里測實際擺長之示意圖 第五圖係本發明之調整塊部之移動方式之示意圖 第六圖係本發明之調整塊部之移動方式之剖面示意圖 第七圖係本發明之敲擊裝置之示意圖 第八圖係本發明之詳細步驟之示意圖 第九A圖係本發明之實施方式之動作一之示竟圖 第九B圖係本發明之實施方式之動作二之示意圖 第十圖係本發明之重複件測之示意圖 “ 第十一圖係本發明之控制系統之示意圖32 and - iron block 33, using the principle of electromagnetic to control the action of the weaving portion 31. As shown in the eighth figure, the detailed steps regarding the detecting step 52 are as follows: 1 [1] Adjustment step 521: adjusting the adjustment block portion 24 to a predetermined position. [2] Strike step 522: A plurality of predetermined tap points 211 are defined on the striking portion 21 of the baseball body 20, and a tapping is performed by the tapping device 30 for a plurality of predetermined enemy points 211; [3] Vibrating distance measuring step 523: with the sensing device 40 Measure the vibration spectrum generated by the complex enemy point 211 after tapping, obtain the minimum vibration point X, and calculate the distance from the minimum vibration point X to the second frame connecting portion 221, and obtain the reference length d0; [4] The actual swing length calculation step 524: calculating the swing length of the swing period generated by the bat body 20 when the minimum vibration point 敲 is tapped, that is, obtaining a real tamper length. As shown in the ninth diagram, it is assumed that the adjustment block portion 24 is adjusted to a predetermined position P1, and the striking portion 21 defines a first--second, 201043298, fourth, and fifth predetermined hit points. , 211, 21, 211 〇 21, 211 £, and tapping one by one with the striking device 30; as shown in the ninth β map, assuming that the third predetermined tapping point 211C is tapped When the vibration is minimum, the distance from the third predetermined tap point 211C to the second pivot point 221 is the reference length dO; and when the third predetermined hit point 2UC is tapped, the bat body 2 is The actual swing length is calculated by the swing period T' generated; the predetermined value is assumed to be set to 3 cm, and when the adjustment block portion 24 is at the first predetermined position ρι, the second predetermined hit point 2ilG is - the minimum vibration point X, and the reference length fl〇 is 60 cm, and the swing period of the bat body 2〇 is about 丨6 seconds, then the formula of the period 7′= is used to know that the actual pendulum length system Approximately 70 cm, the error value L and 1 〇 centimeter are outside the range of the predetermined value A, therefore, it is necessary to return to the detection step 52, The predetermined position of the adjustment block portion 24 is further broken (the position of the adjustment block portion 24 is changed, the minimum position of the vibration point X is also changed), and the measurement is performed until the error value L Less than the predetermined value A', as shown in the tenth, the adjustment block portion 24 is adjusted from the first predetermined position P1 to the second predetermined position P2, and the first, second, third, fourth is tapped again. And the fifth predetermined tapping point, 211A, 21lB, the dish, the minimum vibration point x is detected, and the obtained error value l is again compared with the predetermined value a, if the error value L is smaller than the predetermined value A, That is, the spheroid hitting center is the most oscillating point of the vibration point. If the error value L is still greater than the predetermined value A, the detecting step 52 is repeated, and the predetermined position of the adjusting block portion % is changed again after 201043298. Hit, measure and other actions. As shown in the tenth-figure, the control button of the present invention is controlled and displayed by a processor, a display, and an input keyboard, and the connection with each part is as follows: Ο ❹ [1] About the knock The device 30 is driven by an adjusting screw and a platform, and the processor of the control system is controlled by a controller, a driver, a servo motor and a coupling. The device 30 and the processor are controlled by a controller and a switch; [2] regarding the sensing device 4〇', in addition to the vibration 2 generated after the tapping, the timing 2 is also used. The sensing device 40 transmits the measured signal to a signal amplifier, and then is thinned and converted by an A/D signal converter (analog digital converter) to the processor. The processor displays its measurement results on the display. In addition, _ the minimum vibration coffee _, its fine detection of the vibration; suppose the twelfth, tenth and tenth four diagrams, - the first - and - third financial hit points (211 Α, _ When the f-vibration is examined, the domain amplitudes are -first-amplitude A1, one-, amplitude A2, and -third expansion (four). After comparison, it can be seen that the twelfth b-picture is: The advantages and effects of the present invention are summarized as follows: (1) The most effective blow can be achieved. The minimum vibration point of the traditional bat is not in the same position as the 201043298 weight=position pass f, and cannot be combined with the best hitting and hitting The comfort of the present invention utilizes the movement of the adjustment block portion 24 to obtain the position where the minimum vibration point X is closest to the center of gravity of the bat, forming an optimal hit point, so that the striker can not only hit the ball The farthest, and the vibration generated by the bat is also the smallest, which can produce the most effective blow. » [2] The bat's center of gravity can be adjusted according to the player's habit. The traditional bat can't adjust the bat's center of gravity according to the habit of the player. The player can only strike with a weight of the weight and a relatively straight bat; the adjustment block of the present invention can be used as a The adjustment of the predetermined distance S allows different players to adapt the block (4) _ the most convenient swing and swipe according to their own habits. The above is only explained in detail by the preferred embodiment, for the implementation < Any simple modifications and changes made without departing from the spirit and scope of the present invention are described in detail by the Society. It can be recorded that the present inventors have made it clear that the present invention can achieve the aforementioned objectives and is in compliance with the provisions of the law. The invention patent application is heard. [Simplified illustration of the drawing] The figure is a schematic diagram of the method of molding the bat striking center and the minimum vibration point of the present invention, and the second figure is the bat striking center and the minimum vibration point of the present invention. Schematic diagram of the striking detection device of the model method, 0. The third figure is the model of the minimum vibration point of the bat strike in the present invention. 201043298 The schematic diagram of the measurement of the minimum vibration point. The fourth figure is the bat strike of the present invention. Schematic diagram of measuring the actual pendulum length in the method of molding the center and the minimum vibration point. FIG. 5 is a schematic view showing the movement mode of the adjusting block portion of the present invention. FIG. 6 is a moving side of the adjusting block portion of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 7 is a schematic view of a tapping device of the present invention. FIG. 8 is a schematic view showing the detailed steps of the present invention. FIG. 9A is an embodiment of the present invention. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 10 is a schematic view of a repeating part of the present invention. FIG. 11 is a schematic view of a control system of the present invention.
布丁~ L圖係本發明之敲擊點二 三之振動_之示意圖 【主要元件符號說明】 51準備步驟 11第一樞接部 21打擊部 23預定空間 221第二樞接部 s預定距離 40感測裝置 基座 $棒本體 22握部 24調整塊部 231内壁面 30敲擊裝置 52檢測步驟 12 201043298 211預定敲擊點 P1第一預定位置 X最小振動點 10參考長度 53判定步驟 L誤差值 A預定值 60螺桿 231A凹槽 241螺紋孔 242凸部 31撞擊部 32磁圈 33鐵塊 521調整步驟 522敲擊步驟 523振動距離量測步驟 524實際擺長計算步驟 211A第一預定敲擊點 211B第二預定敲擊點 211C第三預定敲擊點 211D第四預定敲擊點 211E第五預定敲擊點 P2第二預定位置 A1第一振幅 A2第二振幅 A3第三振幅 13Pudding ~ L diagram is the schematic diagram of the vibration point of the striking point of the present invention. [Main component symbol description] 51 preparation step 11 first pivoting portion 21 striking portion 23 predetermined space 221 second pivoting portion s predetermined distance 40 sense Measuring device base $rod body 22 grip portion 24 adjustment block portion 231 inner wall surface 30 tapping device 52 detecting step 12 201043298 211 predetermined tapping point P1 first predetermined position X minimum vibration point 10 reference length 53 determination step L error value A Predetermined value 60 screw 231A groove 241 threaded hole 242 convex portion 31 striking portion 32 magnetic ring 33 iron block 521 adjustment step 522 tapping step 523 vibration distance measuring step 524 actual pendulum length calculating step 211A first predetermined tapping point 211B Two predetermined tap points 211C third predetermined tap point 211D fourth predetermined tap point 211E fifth predetermined tap point P2 second predetermined position A1 first amplitude A2 second amplitude A3 third amplitude 13