Pitching analysis system and pitching analysis method

Abstract

To provide a pitching analysis system and pitching analysis method that can detect the pressure applied to the ball or fingers during pitching. [Solution] The device comprises a pressure sensor 2 capable of detecting the pressure applied to the ball or the fingers of the hand that contact the ball during pitching, a transmitting unit 3 that transmits the pressure detected by the pressure sensor as a pressure signal during pitching, and a receiving unit 4 that receives the pressure signal and displays or records the time change of the pressure applied to the ball or fingers during pitching based on the received pressure signal. It is also preferable that the pressure sensor be attached to at least one of the pad, tip, and side of the finger.

Description

Technical Field

[0001] The present invention relates to a pitching analysis system and a pitching analysis method capable of analyzing pitching motions such as in baseball.

Background Art

[0002] In baseball, the performance of a pitcher is critically important, and thus the pitcher's pitching practice is very important. In recent years, a device called Rapsodo (registered trademark) has been commercially available, which determines the pitch type of a pitcher using a simple ballistic measuring device equipped with a high-performance camera and a radar. With this device, the ball speed, rotation speed, effective rotation speed, effective rotation rate, and rotation axis can be analyzed, and a pitcher can easily grasp the quality of the ball he / she has thrown. <00000!0>However, for the analysis of motions when throwing a good ball or a bad ball, especially the way of applying force at the release, only qualitative understanding such as rules of thumb and intuition has been possible. Therefore, the guidance from managers and coaches has also been qualitative.

[0003] For this reason, conventionally, for example, in Patent Document 1, a wearable device is provided on the hand that throws the ball, a built-in detection device is provided in the ball, a wearable detection device is provided on the wearable device, the built-in detection device and the wearable detection device have the same type of motion detection sensors (geomagnetic sensors), and a control unit for analyzing the relative motion between the hand and the ball is provided based on the detection output from the motion detection sensor provided in the built-in detection device and the detection output from the motion detection sensor provided in the wearable detection device. A pitching analysis device has been proposed. Note that a geomagnetic sensor is adopted as the motion detection sensor, and at least one of an acceleration sensor and an angular velocity sensor is provided in the wearable detection device. With this pitching analysis device, it becomes possible to grasp the relative relationship between the movement and rotation of the hand during the pitching motion and the movement and rotation of the ball, and to obtain the relationship between the movement of the hand and the rotation of the ball after release, the timing of release, etc. <00!00018>

Patent Document

[0004] [Patent Document 1] Japanese Patent Publication No. 2019-63386 [Overview of the project] [Problems that the invention aims to solve]

[0005] The above conventional technologies still have the following challenges. In other words, the pitching analysis device described in Patent Document 1 has acceleration sensors and angular velocity sensors in the attachment detection device installed on the hand attachment, but it has the disadvantage of not being able to detect the pressure actually applied to the ball or fingers during pitching. Furthermore, the pitching analysis device described in Patent Document 1 has the disadvantage of not being able to analyze balls actually used in games because it requires the detection device to be installed in the ball. If the detection device is installed in a ball actually used in a game, there is a problem that the weight of the ball will change.

[0006] The present invention has been made in view of the aforementioned problems, and aims to provide a pitching analysis system and a pitching analysis method that can detect the pressure applied to the ball or fingers during pitching. [Means for solving the problem]

[0007] To solve the above problems, the present invention employs the following configuration. Specifically, the pitching analysis system according to the first invention is characterized by comprising: a pressure sensor capable of detecting the pressure applied to the ball or the fingers of the hand in contact with the ball during pitching; a transmitting unit that transmits the pressure detected by the pressure sensor during pitching as a pressure signal; and a receiving unit that receives the pressure signal and displays or records the time change of the pressure applied to the ball or the fingers during pitching based on the received pressure signal.

[0008] This pitching analysis system includes a pressure sensor capable of detecting the pressure applied to the ball or the fingers of the hand in contact with the ball during pitching, a transmitting unit that transmits the pressure detected by the pressure sensor as a pressure signal during pitching, and a receiving unit that receives the pressure signal and displays or records the time change of the pressure applied to the ball or fingers during pitching based on the received pressure signal. Therefore, it is possible to measure the pitching motion and the amount of force applied to the ball or fingers until release as data. In other words, information on the change in pressure on the ball or fingers according to the speed and type of pitch (straight, curveball, etc.) of the thrown ball can be obtained, and it becomes possible to easily analyze the quality of the thrown ball from the obtained information. Consequently, it becomes easier to obtain and understand the motion analysis of a bad pitch, especially the way force is applied at release, as measured information rather than relying on experience or intuition.

[0009] The pitching analysis system according to the second invention is characterized in that, in the first invention, the pressure sensor is attached to at least one of the pad, tip, and side of the finger. In other words, in this pitching analysis system, a pressure sensor is attached to at least one of the fingertips: the pad (opposite side of the nail), the tip, and the side (the side between the nail and the pad). This allows for the measurement of pressure at least one of the fingertips, tip, and side—areas where pressure is particularly applied during pitching—and enables the acquisition of a more direct understanding of pressure changes on the finger. It is preferable to attach the pressure sensor to the side of the finger when pitching curveballs such as forkballs, where the pressure applied to the side of the finger is particularly high.

[0010] The pitching analysis system according to the third invention is characterized in that, in the first invention, the pressure sensor is provided on the surface or inside the ball. In other words, in this pitching analysis system, since a pressure sensor is installed on the surface or inside the ball, information about the pressure changes applied to the ball during pitching can be obtained. In particular, if the pressure sensor is installed on the surface of the ball, the pressure applied to the ball from the fingers can be directly detected.

[0011] The pitching analysis system according to the fourth invention is characterized in that, in the second or third invention, the pressure sensor is a film-type sensor. In other words, in this pitching analysis system, the pressure sensor is a film-type sensor, so the sensor is thin and flexible, causing less discomfort when worn on the finger and gripping the ball. Furthermore, even when attached to the surface of the ball, the surface irregularities are small, resulting in less discomfort to the fingers when gripping the ball.

[0012] The pitching analysis system according to the fifth invention is characterized in that, in the fourth invention, the pressure sensor is attached to the tip of the index finger. In other words, in this pitching analysis system, the pressure sensor is attached to the tip of the index finger, so by setting the data acquisition time interval to a short duration, such as 1 millisecond, it becomes possible to detect with high accuracy the instantaneous pressure applied to the fingertip of the index finger at the time of pitching release.

[0013] The pitching analysis system according to the sixth invention is characterized in that, in the first or second invention, it comprises a plurality of pressure sensors that can be installed at a plurality of locations on the ball or that can be attached to a plurality of fingers, and the receiving unit has a function of superimposing and displaying the time change of pressure applied to a plurality of locations on the ball or a plurality of fingers during pitching, based on a plurality of pressure signals of pressure detected by the plurality of pressure sensors. In other words, this pitching analysis system has a receiving unit that displays the time-dependent changes in pressure applied to multiple points on the ball or multiple fingers during a pitch, based on multiple pressure signals detected by multiple pressure sensors. This makes it easy to relatively understand what kind of pressure is applied to different points on the ball or different fingers during a pitch.

[0014] The pitching analysis system according to the seventh invention is characterized in that, in the sixth invention, the pressure sensor is attached to the index finger and middle finger of the hand. In other words, this pitching analysis system has pressure sensors attached to the index and middle fingers of the hand, making it possible to display and compare pressure information from the index and middle fingers, which are typically subjected to the most pressure during pitching. Therefore, it is easy to understand, for example, what kind of pressure is applied to the index and middle fingers depending on the type of pitch.

[0015] The pitching analysis system according to the eighth invention is characterized in that, in the seventh invention, the pressure sensor is further attached to the thumb of the hand. In other words, this pitching analysis system also has a pressure sensor attached to the thumb, making it possible to compare and display pressure information from the three fingers that primarily grip the ball: the index finger, middle finger, and thumb.

[0016] The pitching analysis system according to the ninth invention is characterized in that, in the first or second invention, the receiving unit has a function to display a diagnostic result regarding the quality of the pitch by comparing the time change of pressure applied to the ball or fingers during an ideal pitch, which is stored in advance, with the time change of pressure applied to the ball or fingers that has been detected. In other words, this pitching analysis system has a function in which the receiving unit compares the time change of pressure applied to the ball or fingers during an ideal pitch, which is stored in advance, with the time change of pressure applied to the ball or fingers that has been detected, and displays a diagnosis result regarding the quality of the pitch. Therefore, it is possible to easily judge the quality of the pitch from the displayed diagnosis result.

[0017] The pitching analysis system according to the tenth invention is characterized in that, in the first or second invention, the transmitting unit transmits the pressure signal wirelessly, and the receiving unit receives the pressure signal wirelessly. In other words, in this pitching analysis system, the transmitter wirelessly transmits pressure signals, and the receiver wirelessly receives pressure signals. Therefore, there is no need to connect the transmitter and receiver with a wire, and the transmitter can be attached to the pitcher, while the receiver can be placed at a location away from the pitcher. This reduces the amount of equipment that the pitcher has to wear, minimizing any burden or interference during pitching.

[0018] The pitching analysis method according to the 11th invention includes a detection step of detecting, with a pressure sensor, the pressure applied to the ball or the fingers of the hand contacting the ball during pitching, a transmission step of transmitting, as a pressure signal, the pressure detected by the pressure sensor during the pitching, and a reception step of receiving the pressure signal and displaying or recording the temporal change in the pressure applied to the ball or the fingers during the pitching based on the received pressure signal.

Advantages of the Invention

[0019] According to the present invention, the following advantages are achieved. That is, according to the pitching analysis system and the pitching analysis method according to the present invention, a pressure sensor capable of detecting the pressure applied to the ball or the fingers of the hand contacting the ball, a transmission unit that transmits, as a pressure signal, the pressure detected by the pressure sensor during pitching, and a reception unit that receives the pressure signal and displays or records the temporal change in the pressure applied to the ball or the fingers during pitching based on the received pressure signal are provided. Therefore, the pitching motion during pitching and the state of the force applied to the ball or the fingers until release can be measured as data. Therefore, in the pitching analysis system of the present invention, it becomes easy to obtain and understand, as actual measurement information rather than by rules of thumb or intuition, the motion analysis when throwing a bad pitch, particularly the way of applying force at the time of release, and it also becomes possible to obtain a hint for an improvement method when there is a malfunction or an error occurs.

Brief Description of the Drawings

[0020] [Figure 1] It is a simplified configuration diagram showing a first embodiment of the pitching analysis system and the pitching analysis method according to the present invention. <000009​​​​​​This graph shows an example of pressure change over time when pressure sensors are attached to the tips of the index and middle fingers in the first embodiment. [Figure 5] This graph shows an example of pressure change over time when pressure sensors are attached to the tip of the index finger, the pad of the index finger, the pad of the middle finger, and the tip of the middle finger in Embodiment 1 of the pitching analysis system and pitching analysis method according to the present invention. [Figure 6] This graph illustrates the definition of parameters for the waveform of the pressure signal in Example 1 of the pitching analysis system and pitching analysis method according to the present invention. [Figure 7] This graph shows the waveform of the pressure signal over time in Example 3 of the pitching analysis system and pitching analysis method according to the present invention, with the data acquisition time interval set to 10 milliseconds (a) and 1 millisecond (b). [Figure 8] This is a simplified diagram showing a second embodiment of the pitching analysis system and pitching analysis method according to the present invention. [Modes for carrying out the invention]

[0021] Hereinafter, a first embodiment of the pitching analysis system and pitching analysis method according to the present invention will be described with reference to Figures 1 to 4.

[0022] As shown in Figures 1 to 3, the pitching analysis system 1 of this embodiment includes a pressure sensor 2 that can be attached to the fingers F of the hand H that contact the ball B during pitching, a transmitting unit 3 that transmits the pressure detected by the pressure sensor 2 as a pressure signal during pitching, and a receiving unit 4 that receives the pressure signal and displays or records the time change of the pressure applied to the fingers F during pitching based on the received pressure signal. The ball B mentioned above can be any type of ball, such as a baseball, softball, rugby ball, or American football.

[0023] The pressure sensor 2 described above is attached to at least one of the pad, tip, and side of the finger F. Furthermore, as shown in Figures 1 and 2, the pitching analysis system 1 of this embodiment is equipped with multiple pressure sensors 2 that can be attached to multiple fingers F. In other words, the pressure sensor 2 of this embodiment is attached, for example, to the index finger F1 and middle finger F2 of hand H, and also to the thumb F0 of hand H. In Figure 1, pressure sensors 2 are attached to the pad of the thumb F0, the tip of the index finger F1, and the pad of the middle finger F2.

[0024] The receiving unit 4 has a function to display the time-dependent changes in the pressure applied to multiple fingers F during pitching, based on multiple pressure signals detected by multiple pressure sensors 2. In other words, the receiving unit 4 includes a display unit 4a, such as a liquid crystal screen, which displays the time change of the above pressure. The display unit 4a described above is capable of displaying the waveform of the pressure signal as a graph, and can show the peak position and rising edge position of the pressure signal. The receiving unit 4 is, for example, a personal computer.

[0025] The receiving unit 4 has a function to compare the time change of pressure applied to finger F during an ideal pitch, which is stored in advance, with the time change of pressure applied to finger F that has been detected, and to display a diagnostic result regarding the quality of the pitch.

[0026] For example, if a straight pitch unintentionally turns into a slider, the receiver 4 compares the pressure change applied to finger F during an ideal straight pitch (which it has memorized) with the measured pressure change applied to finger F during a slider pitch and displays them together in a graph or similar. If the pressure applied to the middle finger F2 during the measurement is excessive, the receiver 4 displays this as a diagnostic result. Furthermore, the following data can be used as the "time change of pressure applied to finger F during an ideal pitch" mentioned above. • Data created based on the pitcher's own past pitching data (for example, data from when the pitcher was in good form) (this can be data from a single pitch or an average of multiple pitches). • Pitching data from another person, such as a professional pitcher or coach (either data from a single pitch or an average of multiple pitches). • Ideal pitching data derived theoretically based on sports science and other fields, rather than relying on actual measurements.

[0027] The transmitting unit 3 transmits a pressure signal wirelessly, and the receiving unit 4 receives the pressure signal wirelessly. For example, the transmitter 3 and the receiver 4 communicate wirelessly using Bluetooth® or Wi-Fi. As mentioned above, wireless communication is preferred for communication between the transmitting unit 3 and the receiving unit 4, but wired communication may also be used.

[0028] The pressure sensor 2 can be attached, for example, by wrapping tape around finger F while it is positioned on finger F. Alternatively, the pressure sensor 2 may be attached to the inner surface of the finger portion of a thin glove, such as a thin nitrile glove, and then worn on the hand H. The pressure sensor 2 described above is preferably a small, thin, flexible, film-like sensor (film sensor), and existing pressure sensors such as resistive film type, capacitive type, piezoelectric element type, or pressure-sensitive conductive elastomer can be used. Each pressure sensor 2 and the transmitting unit 3 are connected, for example, by a thin lead wire 2a. Furthermore, the above-mentioned film-like sensor is, for example, a strip-shaped flexible substrate with a thickness of 0.7 mm and a width of 2.95 mm or 3.9 mm, with the sensor element portion of the pressure sensor 2 mounted on the leading edge and a terminal portion for connecting lead wires 2a provided at the base end. The thickness of the sensor element portion can also be as thin as 0.3 to 0.7 mm, such as 0.334 mm or 0.643 mm. The sensor element portion can be a chip shape, such as a rectangular or circular shape in plan view, and a chip width of less than or slightly larger than the width of the strip-shaped flexible substrate is preferred.

[0029] The transmitting unit 3 described above is attached to the pitcher's body, for example, with a band or the like, so as not to interfere with the pitcher's throw. It is preferable to attach the transmitting unit 3 to the pitcher's waist or other location where it is less likely to interfere with the pitcher's throw. The receiving unit 4 described above may be installed, for example, at a location away from the pitcher, or it may be attached to the pitcher's body (for example, around the waist) as long as it does not interfere with the pitcher's throw. Furthermore, when attached to the pitcher's body, the receiving unit 4 is only used for receiving and recording pressure signals, and the display unit 4a is provided separately, making it possible to achieve miniaturization.

[0030] The pitching analysis method of this embodiment includes a detection step in which a pressure sensor 2 detects the pressure applied to the fingers F of the hand H that contact the ball B during pitching; a transmission step in which the pressure detected by the pressure sensor 2 during pitching is transmitted as a pressure signal; and a reception step in which the pressure signal is received and the time change of the pressure applied to the fingers F during pitching is displayed or recorded based on the received pressure signal.

[0031] In the pitching analysis system 1 of this embodiment, for example, as shown in Figure 2, when pressure sensors 2 are attached to the tip of the index finger F1, the pad of the middle finger F2, and the pad of the thumb F0, the pressure signal waveforms of the index finger F1 and middle finger F2 when pitching are displayed as shown in Figure 4. For example, as shown in Figure 3, the pressure applied to the index finger F1 and middle finger F2 at the moment of release of ball B during pitching reaches a peak, as shown in Figure 4.

[0032] As described above, the pitching analysis system 1 and pitching analysis method of this embodiment include a pressure sensor 2 that can be attached to the fingers F of the hand H that contact the ball B during pitching, a transmitting unit 3 that transmits the pressure detected by the pressure sensor 2 as a pressure signal during pitching, and a receiving unit 4 that receives the pressure signal and displays or records the time change of the pressure applied to the fingers F during pitching based on the received pressure signal. Therefore, the pitching motion and the amount of force applied to the fingers F until release during pitching can be measured as data.

[0033] In other words, information can be obtained regarding the change in pressure on finger F according to the speed and type of ball B thrown (such as a fastball or curveball), and it becomes possible to easily analyze the quality of the thrown ball B from the obtained information. Therefore, it becomes easier to obtain and understand the motion analysis when throwing a bad ball B, especially how force is applied at the time of release, not based on empirical rules or intuition, but as measured information.

[0034] Furthermore, since the pressure sensor 2 is attached to at least one of the finger pad (opposite side of the nail), tip, and side (side between the nail and the pad) of the finger F, it is possible to measure the pressure at at least one of the finger pad, tip, and side, which are areas where pressure is particularly applied during pitching, and to obtain a more direct understanding of the pressure changes on the finger F. It is preferable to attach the pressure sensor 2 to the side of the finger F when pitching curveballs such as forkballs, where the pressure applied to the side of the finger F is particularly large.

[0035] Furthermore, the receiving unit 4 has a function to display the time-dependent changes in pressure applied to multiple fingers F during pitching, based on multiple pressure signals detected by multiple pressure sensors 2. This makes it easy to relatively understand what kind of pressure is applied to each of the different fingers F during pitching.

[0036] In particular, since the pressure sensor 2 is attached to the index finger F1 and middle finger F2 of the hand H, it becomes possible to display a comparative view of the pressure information between the index finger F1 and middle finger F2, which are typically subjected to the most pressure during pitching. Therefore, it is possible to easily understand, for example, what kind of pressure is applied to the index finger F1 and the middle finger F2 depending on the type of pitch. Furthermore, since pressure sensor 2 is also attached to the thumb F0 of hand H, it becomes possible to display a comparative view of pressure information from the three fingers that primarily grip the ball B: the index finger F1, the middle finger F2, and the thumb F0. Furthermore, by attaching the pressure sensor 2 to the tip of the index finger F1, it becomes possible to detect with high accuracy the instantaneous pressure applied to the fingertip of the index finger F1 at the time of pitching release.

[0037] Furthermore, since the pressure sensor 2 is a film-type sensor, it is thin and flexible, resulting in less discomfort when worn on finger F and used to grip ball B. Furthermore, the receiving unit 4 has a function to compare the time change of pressure applied to the finger during an ideal pitch, which is stored in advance, with the time change of pressure applied to the detected finger F, and to display a diagnostic result regarding the quality of the pitch. Therefore, it is easy to judge the quality of the pitch from the displayed diagnostic result.

[0038] Furthermore, since the transmitter 3 transmits pressure signals wirelessly and the receiver 4 receives pressure signals wirelessly, there is no need to connect the transmitter 3 and the receiver 4 with a wire. This allows the transmitter 3 to be attached to the pitcher and the receiver 4 to be placed at a location away from the pitcher. This reduces the amount of equipment that needs to be attached to the pitcher, thereby minimizing the burden and interference during pitching.

[0039] Next, a second embodiment of the pitching analysis system and pitching analysis method according to the present invention will be described with reference to Figure 8. In the following descriptions of each embodiment, the same reference numerals will be used for the same components described in the above embodiment, and their descriptions will be omitted.

[0040] As shown in Figure 8, the pitching analysis system 21 of this embodiment includes pressure sensors 22 that are applied to multiple locations on the ball B during pitching, a transmitting unit 23 that transmits the pressure detected by the pressure sensors 22 as a pressure signal during pitching, and a receiving unit 4 that receives the pressure signal and displays or records the time change of the pressure applied to the ball B during pitching based on the received pressure signal. The pressure sensor 22 described above is a film-like sensor, and is attached to at least three locations on the surface of ball B, for example. If ball B is a baseball, it is preferable to place the pressure sensor 22 on the surface of ball B at locations where the index finger, middle finger, and thumb make contact during pitching. Alternatively, the pressure sensor 22 may be placed inside sphere B. In this case, it is preferable to embed it as close to the surface as possible on the inside so that the pressure from the finger in contact with sphere B can be detected.

[0041] The transmitting unit 23 transmits a pressure signal wirelessly, and the receiving unit 4 receives the pressure signal wirelessly. For example, the transmitting unit 23 and the receiving unit 4 communicate wirelessly using Bluetooth® or Wi-Fi. Furthermore, a battery (not shown) is also built into sphere B, supplying power to the transmitter 23. It is preferable that the transmitter 23 and battery be small and lightweight, positioned and built in with balance in mind, so that the center of gravity of sphere B is not as eccentric as possible from the center, and so that their weight is not significantly different from that of a normal sphere.

[0042] In this embodiment, since the pressure sensor 22 is provided on or inside the ball B, the pressure change applied to ball B during pitching can be obtained as information. In particular, if the pressure sensor 23 is provided on the surface of ball B, the pressure applied to ball B from the finger can be directly detected. Furthermore, since the receiving unit 4 has a function to display the time changes of the pressure applied to multiple points on the ball B during pitching, based on multiple pressure signals of the pressure detected by the multiple pressure sensors 23, it becomes possible to relatively easily understand what kind of pressure is applied to each different point on the ball B during pitching. [Examples]

[0043] Table 1 shows the results of measuring the pressure applied to the pitcher's fingers during pitching using the pitching analysis system and pitching analysis method of the first embodiment described above, as Example 1 of the present invention. In Example 1, pressure sensors (SF-3-LT, pressure-sensitive conductive elastomer sensors manufactured by Inaba Rubber Co., Ltd.) were attached to a total of four locations on the right hand of a right-handed pitcher: the pad and tip of the index finger, and the pad and tip of the middle finger. Then, 5V was applied to each pressure sensor, and the pressure signal waveform during pitching was measured and analyzed using this system. An example of the pressure signal waveform measured by each pressure sensor is shown in Figure 5.

[0044] In this system, the maximum value (peak) of the pressure signal waveform from the pad of the index finger is defined as the ball release point, and the position of the trough immediately preceding that signal is defined as the point just before release. As shown in Figure 6, the voltage value at the release point was defined as Vmax, the voltage difference between the release point and just before release as ΔV, and the time from just before release to the release point as t. The pitch was then analyzed using the value ΔV / t. In addition, the rotation speed during pitching was measured separately using Rapsodo® PITCHING2.0. Furthermore, while ΔV / t was used as the evaluation function when comparing the time variation of pressure above, it is also possible to use any function that includes at least one of ΔV, t, and Vmax as the evaluation function.

[0045] In this example, the pitcher's goal was to throw a straight pitch with a rotation speed of 1500 rpm or higher, so the system was configured to set a threshold of 1500 rpm for pitching. Table 1 shows the pitching results and the spin rate measured by Rapsodo®.

[0046] [Table 1]

[0047] In Table 1, when the rotation speed reaches the target of 1500 rpm or higher, it is diagnosed as a good pitch that has met the target, and a "○" is displayed. In Table 1, if the rotation speed is between 1000 rpm and 1500 rpm, it is diagnosed as a pitch that is almost at the target and a "△" is displayed. If the rotation speed is 1000 rpm or less, it is diagnosed as an insufficient pitch that is not at the target and a "×" is displayed.

[0048] As can be seen from the results in Table 1, when the rotational speed exceeds the target of 1500 rpm, the ΔV / t values ​​for both the index finger pad and the middle finger pad exceed 12. Therefore, by pre-setting the receiver to diagnose a good pitch that reached the target if, for example, the ΔV / t values ​​of both the index finger pad and the middle finger pad exceed 12, it becomes possible to diagnose whether or not a pitch has exceeded the target rotation speed without simultaneously measuring the rotation speed.

[0049] Next, as an embodiment 2 of the present invention, the setup is the same as in embodiment 1, but the results of an analysis of the problem of a pitcher whose straight pitch unintentionally has a deviating axis of rotation are shown in Table 2. In this second example, the system was used to analyze the ΔV of the index finger, the ΔV of the middle finger, and the difference between them. In this embodiment, the pitching coach and Rapsodo® evaluated the quality of pitches with a deviated axis of rotation using ○ or ×, and this evaluation was carried out in conjunction with the system. Specifically, if the axis of rotation did not deviate, it was displayed as a good pitch with "○", and if the axis of rotation deviated, it was displayed as an unsatisfactory pitch with "×".

[0050] [Table 2]

[0051] As can be seen from Table 2 of this Example 2, the cause of the rotation axis wobble in the pitcher in this example was unknown, but evaluation of this system revealed that when the difference in ΔV values ​​between the index finger and the middle finger is positive, the rotation axis wobbles (marked with "×" in Table 2). Based on these results, the system was pre-configured so that, for this pitcher's pitches, a positive difference in ΔV value indicates a pitch with a wobbling axis of rotation ("×"), and a negative difference in ΔV value indicates a good pitch with no wobble of the axis of rotation ("○"). This made it possible for the system to diagnose whether the axis of rotation was wobbling or not during a pitch.

[0052] In other words, when the difference in ΔV values ​​is negative, it is considered a good pitch where the axis of rotation did not wobble, and this is pre-stored in the receiving unit as the time change of pressure applied to the finger during an ideal pitch. By comparing this time change of pressure in the ideal case with the time change of pressure applied to the finger detected during the actual pitch (difference in ΔV values) (comparing whether the difference in ΔV values ​​during the actual pitch is positive or negative), it becomes possible to display a diagnosis result regarding the quality of the pitch on the display unit.

[0053] Next, as Embodiment 3 of the present invention, the waveforms of the system with data acquisition intervals of 10 milliseconds and 1 millisecond are shown in Figures 7(a) and 7(b). The pitcher was the same person, and the pitch speed was measured under almost identical conditions. Here, the signals obtained from the index finger and the pressure sensor attached to the tip of the index finger were used. The pitching result with an acquisition time of 1 millisecond was 110.5 km / h, and the pitching result with an acquisition time of 10 milliseconds was 110.7 km / h.

[0054] As a result of the above measurements, as shown in Figure 7(b), a sharp peak P1 was clearly detected in the data acquired from the pressure sensor attached to the tip of the index finger for the pitching result with an acquisition time of 1 millisecond, whereas, as shown in Figure 7(a), no sharp peak was observed in the data acquired from the pressure sensor attached to the tip of the index finger for the pitching result with an acquisition time of 10 milliseconds. By attaching a pressure sensor to the tip of the index finger and taking measurements with a short acquisition time of less than 10 milliseconds, preferably less than 1 millisecond, it becomes possible to analyze the pitcher's movements with higher accuracy, and in particular, to detect with high accuracy the instantaneous pressure applied to the fingertip of the index finger at the time of pitch release.

[0055] It should be noted that the technical scope of the present invention is not limited to the above embodiments and examples, and various modifications can be made without departing from the spirit of the invention. [Explanation of Symbols]

[0056] 1, 21…Pitching analysis system, 2, 22…Pressure sensor, 3, 23…Transmitter, 4…Receiver, B…Ball, F…Finger, F1…Index finger, F2…Middle finger, F0…Thumb, H…Hand

Claims

1. A pressure sensor capable of detecting the pressure applied to the ball or the fingers of the hand that come into contact with the ball during pitching, A transmitting unit that transmits the pressure detected by the pressure sensor during the pitch as a pressure signal, The system includes a receiving unit that receives the pressure signal and displays or records the time change of the pressure applied to the ball or the finger during pitching based on the received pressure signal. A pitching analysis system characterized in that the pressure sensor is attached to at least one of the pad, tip, and side of the finger.

2. In the pitching analysis system according to claim 1, A pitching analysis system characterized in that the pressure sensor is also provided on the surface or inside the ball.

3. In the pitching analysis system according to claim 1 or 2, A pitching analysis system characterized in that the pressure sensor is a film-type sensor.

4. In the pitching analysis system described in claim 3, A pitching analysis system characterized in that the pressure sensor is attached to the tip of the index finger.

5. In the pitching analysis system according to claim 1 or 2, The sphere is equipped with multiple pressure sensors that can be installed at multiple locations or attached to multiple fingers, A pitching analysis system characterized in that the receiving unit has a function to superimpose and display the time changes of pressure applied to multiple locations on the ball or multiple fingers during pitching, based on multiple pressure signals of pressure detected by multiple pressure sensors.

6. In the pitching analysis system according to claim 5, A pitching analysis system characterized in that the pressure sensor is attached to the index finger and middle finger of the hand.

7. In the pitching analysis system described in claim 6, A pitching analysis system characterized in that the pressure sensor is also attached to the thumb of the hand.

8. In the pitching analysis system according to claim 1 or 2, A pitching analysis system characterized in that the receiving unit has a function to display a diagnostic result regarding the quality of the pitch by comparing the time change of pressure applied to the ball or finger during an ideal pitch, which is stored in advance, with the time change of pressure applied to the ball or finger that has been detected.

9. In the pitching analysis system according to claim 1 or 2, The transmitting unit transmits the pressure signal wirelessly. A pitching analysis system characterized in that the receiving unit receives the pressure signal wirelessly.

10. A detection step in which a pressure sensor detects the pressure applied to the ball or the fingers of the hand that are in contact with the ball when the ball is thrown, A transmission step which transmits the pressure detected by the pressure sensor during the pitch as a pressure signal, The system includes a receiving step of receiving the pressure signal and displaying or recording the time change of the pressure applied to the ball or finger during pitching based on the received pressure signal, A pitching analysis method characterized in that the pressure sensor is attached to at least one of the pad, tip, and side of the finger.

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