JPH0545272B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to a golfer playing a golf round or the like.
This invention relates to a pocket-type micro-electronic golf swing training device that easily measures the inclination direction and angle of the swing trajectory of a golf club head with respect to a golf ball anywhere.

<Problems to be Solved by the Invention> The swing trajectory (inside-out or outside-in) of the golf club head relative to the golf ball is related to the flight direction of the golf ball, and is of great interest to golfers. However, the currently commercialized products are large and inconvenient to carry, so they can only be used in specific locations. Therefore, there is a need for a pocket-sized ultra-compact electronic golf swing training device that can easily check the swing trajectory of the golf club head and the inclination angle of the swing trajectory with respect to the golf ball during a round of golf.

<Means for Solving the Problems> The electronic golf swing training device of the present invention includes a pocket-sized infrared transmitter/receiver for detecting the golf swing position and a repeater attached near the golf club head.

The transmitter/receiver includes an infrared light emitting element that emits infrared light to the repeater, an infrared light receiving element that receives a signal via the repeater, an LSI that processes the received light signal, and displays and reports data. The electronic circuit is integrated into an integrated circuit and miniaturized. The repeater includes an infrared light receiving element, an operational amplifier, a delay circuit, a current amplification section, a power supply stabilization circuit section, an infrared light emitting element, and a button type battery. By making the electronic circuit part an integrated circuit and miniaturizing it, it can be built into the golf club head or attached to the club shaft.

In particular, the light emission signal of the infrared light-emitting element of the transmitter/receiver is received by two separately provided infrared light-receiving elements via a repeater, and the integrated circuit element receives the light intensity of each light-receiving element. The distance between the repeater attached to the golf club head and the light receiving element is calculated by comparing the intensity of the known light at the known distance. The present invention is characterized by calculating the swing trajectory of the head and the inclination angle of the swing trajectory.

<Example> The present invention will be explained below with reference to the drawings.

FIG. 1 shows a usage state diagram of a transmitter/receiver and a repeater that are an embodiment of the product of the present invention. The transmitter/receiver 2 is set on the ground, the repeater is built into the toe of the head of the club, and the transmitter/receiver 2 and the repeater 3 are used so as to face each other at an interval of about 20 cm.

FIG. 2 shows a perspective view of the transceiver 2 of the invention.
23 is an infrared light emitting element for searching, 21 and 22 are infrared light emitting elements for measurement, 241 and 242 are infrared light receiving elements, 26 is a display part, 27 is a KEY part, 28 is a pin for ground insertion (for WOOD) (pin).

FIG. 3 shows a perspective view of the repeater of the present invention. 31
32 is an infrared light emitting element, and 32 is an infrared light receiving element.

FIG. 4 is a diagram showing a state in which the relay device of the present invention is built into the toe portion of a club head.

FIG. 5 shows the infrared light emitting elements 21 and 22
FIG. 3 is a perspective view of an infrared light irradiation range at a position cm apart.

FIG. 6 is a front view of the infrared irradiation range. Fifth
In Figure 6, RA is the diameter of the irradiation circle, and RB is the diameter of the double circle. The radiation angle of the infrared light for measurement is
When 2α, the area surrounded by A-A'B-B' becomes the width of the side surface of the irradiation circle, and the length of the side surface becomes D3.
The repeater 3 passes through as shown in the figure.

FIG. 7 and FIG. 10 are diagrams showing the swing angle situation in the case of a straight golf swing.

FIGS. 8 and 11 are diagrams showing swing trajectories in the case of an inside-out swing.

FIGS. 9 and 12 are diagrams showing swing trajectories in the case of an outside-in swing.

7, 8, and 9 show the angle of the swing trajectory when the face of the golf club is perpendicular to the swing trajectory.

FIGS. 10, 11, and 12 show the angles of the swing trajectory when the face of the golf club is inclined in the slice direction. In the figure, H1 indicates the position of the light receiving element 241, and H2 indicates the position of the light receiving element 242. R1 indicates the position of the repeater where the light receiving intensity of the light receiving element 241 is maximum, and H1 and R1 at this time
Let the distance be D1. R2 indicates the position of the repeater where the light receiving intensity of the light receiving element 242 is maximum, and the distance between H2 and R2 at this time is D2. The line connecting the positions H1 and H2 of the light receiving element is M1-M.
2 lines, and a line that is distance D0 away from the M1-M2 line and parallel to the M1-M2 line is L.
1-L2 line. Further, the swing trajectory of the repeater is defined as the C1-C2 line, and a line parallel to the C1-C2 line and passing through the H1 position or the H2 position is defined as the E1-E2 line. Also E1-E2
Let K be the intersection of the line and the H1-R1 line (or H2-R2 line). L1-L2 line and C1
The angle formed by the intersection of the -C2 lines corresponds to the angle θ of the swing trajectory. In FIG. 8, the swing angle θ is determined by the triangle H2-H1-K indicated by H2-H1-K.
This corresponds to the angle K, and in FIG. 9 corresponds to the angle H1-H2-K.

Therefore, let the distance of H1-H2 be D4, and D3=
Assuming D1-D2, the angle θ of the swing trajectory is
It is obtained from the following formula.

sinθ＝D3／D4 sinθ=(D1−D2)/D4 Also, if D1<D2 inside-out swing If D1>D2 outside-in swing If D1=D2 straight swing corresponds to

Similarly, as shown in FIGS. 11 and 12,
In the case of FIG. 11, the angle θ of the swing trajectory when the face of the golf club is inclined can be obtained from the following equation.

sinθ=(D1−D2)/D4 In the case of FIG. 12, it is determined by the following formula.

tanθ=(D1−D2)/D4 When the angle θ is a small value, as an approximate value,
It can be set as follows.

tanθ=sinθ=(D1−D2)/D4 FIG. 13 is a diagram showing the display contents of the display section.
The display section 26 includes a swing count display area 260, a swing trajectory display area 261, a swing trajectory angle display area 262, and an error swing name display area 263. In the example in Figure 13, the number of swings is 145, the swing trajectory is inside out,
It shows that the angle of the swing trajectory is 5 degrees and the error swing name is error number 0.

Note that error 0 in FIG. 13 occurs at the 146th swing, and is also displayed on the previous 145th swing trajectory at the same time.

FIG. 14 is a time chart showing the relationship among the basic clock signal, bit signal, light emission signal and light reception signal. The basic clock signal is CLK, the bit signals are t0 to t7, the light emission signals of the measurement infrared light emitting elements 21 and 22 of the transceiver 2 are S0, the light reception signals of the transceiver 2 are Y and Z, and the light reception signal of the repeater 3. of
RR, and the light emission signal of the repeater 3 is assumed to be RS. The measurement light emission signal S0 emits light at the time of the bit signals t0 and t4, and emits infrared light for only 1.25 μs between 5 μs.
During measurement, the repeater receives signals at 5μs intervals. The infrared light emission signal RS of the repeater 3 is emitted with a one-bit delay from the light reception signal RR, and is distinguished from the reflected light. Next, the infrared light receiving element 241 of the transceiver 2 receives the infrared light receiving signal Y from the repeater, and similarly the infrared light receiving element 242 receives the infrared light receiving signal Z from the repeater. The light reception signals Y and Z are received at time t2 or t6. Incidentally, the light reception signal X is the light reception signal Y and Z.
shows.

FIG. 15 shows a time chart of sampling voltages corresponding to light intensity. SL has an infrared emission signal S0 for measurement (emission for 1.25μs in 5μs) at 20m.
Lights up for s hours. The repeater emits the RS signal while receiving the S0 signal in the impact area. The light-receiving element 241 receives the RS signal as a light-receiving signal Y, resulting in a sampling voltage V1. As the peak voltage Vp1, the peak voltage of the sampling voltage V1 is detected and stored. When the discharge signal DC1 corresponding to the light receiving element 241 is set for 10 ms, discharge of the discharge voltage VC1 is started. By counting the discharge time T1 up to the threshold voltage Vth using the LSI, the time T1 corresponding to the intensity of light can be determined. Similarly, the discharge time T2 corresponding to the intensity of light received by the light receiving element 242 can be determined from the discharge signal DC2. FIG. 16 shows voltage-time discharge characteristics corresponding to light intensity. The peak voltage Vp1 of the light receiving element 241 and the peak voltage Vp2 of the light receiving element 242 are the discharge time constant CR.
(C is the capacitance of the capacitor, R is the resistance value).

The discharge characteristics are expressed by the following formula.

V=Vp*EXP(-T/CR) Therefore, when the discharge time to the threshold voltage Vth is T, Vth=Vp*EXP(-T/CR) Therefore, the peak voltage Vp is determined by measuring the discharge voltage T. Therefore, it can be obtained using the following formula.

Vp = Vth * EXP (T/CR) However, if the threshold voltage Vth is made to match the DC voltage of the electrical circuit, the peak voltage Vp of the AC component corresponding to the intensity of light will be the value subtracted by the DC component voltage Vth. The actual peak voltage Vp is determined by the following formula.

Vp=Vth*EXP(T/CR)-Vth Next, since the intensity of light is inversely proportional to the square of the distance, if the distance between the repeater and the transmitter/receiver is D, then
The peak voltage Vp and distance D are related by the following equation.

D=C0/root(Vp) However, C0 is a proportionality constant. Therefore, if the distance D between the repeater and the transmitter/receiver is a known value D=D0=20cm, and the discharge time at this time is T0, then D=C0= The peak voltage Vp0 at 20 cm is obtained from the following formula.

Vp0=Vth＊EXP(T0/CR)−Vth Further, the distance D0 and Vp0 are expressed by the following relational expression.

D0=C0/root(Vp0) Similarly, if the discharge time at distance D1 is T1, the relational expression is as follows.

Vp1=Vth*EXP(T1/CR)-Vth D1=C0/root(Vp1) Therefore, the distance D1 can be obtained from the following formula.

D1=D0*root(Vp0/Vp1) Therefore, by measuring the discharge time T1,
The distance D1 can be found.

Similarly, the distance D2 indicating the peak voltage of the light-receiving signal of the light-receiving element 242 is obtained from the following equation.

Vp2=Vth*EXP(T2/CR)-Vth D2=C0*root(Vp0/Vp2) FIG. 17 shows a time chart showing the relationship between the golf swing and the infrared emission signal. S1000 is
Light emission signal once every 1000ms, S100 light emission signal once every 100ms, S1 light emission signal once every 1ms, S
The 0 signal is a light emission signal once every 5 μs. S1000,
S100 and S1 are emitted from the infrared light emitting element 23 for search, and the S0 signal is emitted from the infrared light emitting element 21 and 2 for measurement.
It emits light from 2.

S100 signal is 400ms after the start of backswing
S1 is emitted for 1600ms, S0 signal is emitted for 20m
The light is emitted for s, and the light emission DUTY (number of operations per unit time) is switched depending on the golf swing condition.

Light receiving element 2 when emitting S0 signal for 20ms
The sampling voltage due to light reception by the light receiving element 41 is V1, and the sampling voltage due to light reception by the light receiving element 242 is V2.
It is.

FIG. 18 shows a block diagram of the electric circuit of the transmitter/receiver 2. As shown in FIG. Program controlled by LSI25. 2
1, 22, 23 are infrared light emitting elements, 211, 22
1, 231 is a current amplification driver, 241 and 242 are infrared light receiving elements, and 50 and 60 are light receiving signal intensity detection units that convert the intensity of light into voltage magnitude, and further convert the voltage magnitude into length or shortness of time. Converted,
Input to LSI. The LSI counts the length of time and calculates the voltage intensity. 26 is a liquid crystal display section, 2
61 is a notification section, 27 is a key operation section, and 291 is a power supply circuit that stabilizes the battery voltage and supplies power to the LSI 25, infrared light receiving elements 241 and 242, operational amplifier 240, and display section 26. 29 consists of silver oxide batteries (2 1.5V).

FIG. 19 shows an electrical block diagram of the received light signal strength detection sections 50 and 60. The light-receiving element 241 receives the measurement light emission signal S0 as a reception signal Y, the amplification section 51 amplifies the voltage to an extent that does not saturate, and transmits the voltage V1 to the sampling section 52. The sampling section 52 inputs a signal only while the measurement light emission signal S0 is being emitted, and cuts off the input at other times, so that sampling is performed only in the impact area. The peak voltage of the sampling voltage V1 is detected by the next peak voltage detection section 53, and the peak voltage is further stored. The next voltage value detection unit 54 converts the voltage value into a time value according to the discharge instruction signal DC1 and inputs it to the LSI. LSI25
By counting the discharge time, the peak voltage value is determined by time T1. Similarly, the peak voltage value of the light receiving element 242 is determined based on the discharge time T2.

FIG. 20 shows a circuit example of the voltage value detection section 54 (or 64). After lowering the impedance of the peak voltage value Vp1 with the voltage follower 540, the FET
The peak voltage value is stored in the capacitor C (542) through the element 541 only during the sampling time SL. Due to the discharge signal DC1, FET element 5
44 operates, and the time constant CR is set by the resistor R (543).
to discharge. + (plus) of comparator 547
When the input terminal becomes the same voltage as the voltage Vth of the - (minus) input terminal, the output Y of the comparator 547
By changing from high level to low level, comparator 5 changes from the rising edge of DC1 signal.
The time until the output of 47 falls is the discharge time T.
This corresponds to 1. In addition, the voltage follower 54
8 sets the reset voltage. RE is a reset signal, which sets the voltage Vc1 of the capacitor C to the reset voltage, and normally sets the output of the voltage follower 547 to a low level.

FIG. 21 shows a block diagram of the electrical circuit of the repeater 3. A driver 3 receives an infrared signal at a light receiving element 32, amplifies the voltage at an operational amplifier 33, and delays it by 1 bit at a delay circuit 34 to distinguish it from reflected light.
5, the current is amplified and an infrared signal is transmitted from the infrared light emitting element 31. The electric circuit 36 stabilizes the power supply voltage of the battery 37 and supplies power to the infrared light receiving element 32, operational amplifier 33, and delay circuit 34. battery 37
consists of silver oxide batteries (2 1.5V).

FIG. 22 shows a flowchart of a program for measuring the inclination direction and inclination angle of the swing trajectory of a golf club. When the swing trajectory inclination direction and inclination angle measurement start key is operated, a swing trajectory inclination angle measurement program is executed. First, step
At 901, the number of previous swings and the direction and angle of inclination of the swing trajectory are displayed for one second. In the next step 902, the search infrared light emission signal S1000 is
emits light once every 1000ms. In the next step 903, the presence or absence of a light reception signal is confirmed. If there is no light reception signal, steps 901 and 903 are repeated.

When the light reception signal is confirmed in step 903, the process moves to the next step 904, and an address set confirmation sound is announced. In the next step 905, the search infrared light emission signal is switched to S100, which emits light once every 100 ms, and the search speed is increased.In the next step 906, when the light reception signal is confirmed, the process returns to step 905.
During addressing, steps 905 and 906 are repeated.

Next time you start a takeback, step 906
The received light signal cannot be confirmed in the next step.
The process moves to 907, where the search infrared light emission signal S100 is emitted, and if the light reception signal cannot be confirmed at the next step 908, the process moves to the next step 909. Step 907 and step 400ms from start of takeback
Repeat between 909. When the light reception signal is confirmed in step 908, it is determined that the watsuguru operation is performed, and the process proceeds to step 905.
Return to address state.

Next, when 400 ms or more have elapsed after the start of takeback, the process moves to the next step 910, where the search infrared emission signal is switched to the S1 signal that emits light once every 1 ms.
Make the search speed even faster.

If the light reception signal is not confirmed in the next step 911, the process moves to the next step 912, and the time within 2000 ms after the start of takeback is monitored. During top of swing and downswing, step 910
and step 912 are repeated.

Next, approach the impact area and step 911
When the search infrared light emitting signal S1 is confirmed, the process moves to the next step 913, and the measurement infrared light emitting element 21 is detected.
and 22 starts emitting the infrared light emission signal S0 once every 5 μs. If the light reception signals Y and Z are received in the next step 914, the light reception voltages V1 and V2 are transmitted to the peak detection section in the next step 915. In the next step 916, the impact swing time is monitored for 20 ms, and in the impact swing area, steps 913 and 916 are repeatedly executed.
The light intensity peak value of the S0 signal is converted into a voltage peak value and stored. 20ms at step 916
If the above is detected, the process moves to the next step 917.

Next, in step 917, the peak voltage Vp1 corresponding to the light receiving element 241 is monitored for a discharge time of 20 ms. In the next step 918, the discharge signal for Vp1 is
Generate DC1 and start discharging Vc1 voltage.
In the next step 919, it is checked whether the Vc1 voltage has dropped to the threshold voltage Vth. If Vc1>Vth, T1 is counted up in the next step 920. Steps 917 and 920 are repeatedly executed until Vc1=Vth, and time T1 is counted. step 919
When Vc1=Vth, the counting of T1 in step 920 ends, and the value of T1 at this time becomes the time corresponding to Vp1. When 20 ms or more is detected in step 917, the measurement of the voltage value Vp1 is finished and the process moves to the next step 921.

Similarly, steps 921 and 924 are executed to find the time T2 corresponding to the peak voltage value Vp2.

Next, when it is confirmed in steps 925 to 927 that T1 and T2, which correspond to Vp1 and Vp2, are both measured, the process moves to the next step 928, and the peak voltage values Vp1 and T2 are determined from T1 and T2.
Calculate Vp2.

Furthermore, in the next step 929, distances D1 and D2 corresponding to Vp1 and Vp2 are calculated.

Next, in step 930, if the distance is D1=D2, it is determined that the swing is straight, and the process moves to step 931, where the angle of the swing trajectory is set to θ=0.

If D1<D2 at step 932, it is determined that the swing is inside-out, and step 933 is executed.
Next, calculate the angle θ of the swing trajectory.

When D1>D2, it is determined that the swing is outside-in, and the process moves to step 934, where the angle θ of the swing trajectory is calculated.

In step 935, the inclination direction of the swing trajectory and the inclination angle θ of the swing trajectory are stored in the memory, and in the next step 936, a measurement completion sound is announced, and then the process returns to the first step 901 to record the measured inclination of the swing trajectory. The direction name and the tilt angle θ of the swing trajectory are displayed on the display section.

In addition, at step 912, 2000m after the start of the swing
If no light reception signal is detected within s, it is determined that the swing is not a golf swing, and an error 0 is returned at step 937.
shall be. Also, at step 925, T1+T2=0
If so, it is determined that the trajectory of the golf swing is off, and error 1 is generated in step 938.
If T1=0 in step 926, it is determined that the swing is extreme outside-in, and error 2 is generated in step 939. If T2=0 at step 927, extreme inside-out
It is judged to be a swing and error 3 occurs at step 940.
to occur.

After the measurement is stopped due to the occurrence of the error described above and an error sound is issued in step 941, the process returns to the first step 901 and the error number is displayed on the display section.

FIG. 23 shows a flowchart of a memory reading program. When the memory key is operated, the user first specifies the memory address of the last swing. Read the memory contents in step 953,
At step 954, the number of swings in the final round, the tilt direction of the swing trajectory, and the tilt angle of the swing trajectory are displayed. In the next step 955, the number of swings is counted down and displayed sequentially up to the first number of swings. For example, when the memory capacity is for 100 swings, if you swing 250 times, the number of swings 250, the direction of inclination of the swing trajectory, and the angle of inclination of the swing trajectory will be displayed, and then sequentially up to the first number of swings of 151. The number of swings, the tilt direction of the swing trajectory, and the tilt angle of the swing trajectory are displayed.

<Effects of the Invention> The electronic golf swing training machine of the present invention receives the light emission signal of the infrared light emitting element in the impact area of the golf swing with the infrared light receiving element provided separately, and By comparing the light intensities of the elements, the swing trajectory (inside-out swing and outside-in swing) of the golf club head and the inclination angle of the swing trajectory are measured. Therefore, by increasing the light-receiving sensitivity of the infrared light-receiving element, it is possible to increase the accuracy of measuring the tilt angle of the swing trajectory, and it is possible to measure the tilt angle of the swing trajectory with more than 10 times the accuracy compared to the conventional method. It is possible to measure.

Furthermore, by integrating the internal electronic circuit, it is possible to manufacture a pocket-sized ultra-compact electronic golf swing training machine.

Therefore, it can be easily used anywhere, such as during a round of golf, during batting practice at a golf driving range, or while practicing swings at home.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the state of use of the present invention, Fig. 2 is a perspective view of a transceiver, Fig. 3 is a perspective view of a repeater,
Figure 4 is a diagram showing the repeater built into the golf club head, Figure 5 is a perspective view of the infrared light irradiation range at a position 20 cm away from the infrared light emitting element for measurement, and Figure 6. is a front view of the infrared light irradiation range by the infrared light emitting element for measurement, Figures 7 and 10 are diagrams showing the swing angle state in the case of a straight swing, and Figures 8 and 11 are diagrams showing the inside-out and Diagram showing the state of the swing angle in the case of swing, No. 9
Figure 12 shows the swing angle state in the case of outside-in swing, Figure 13 shows the display contents of the display, and Figure 14 shows the basic clock signal, bit signal, light emission signal, and light reception. A time chart showing the relationship between signals, Figure 15 is a time chart of the sampling voltage corresponding to the intensity of light, the first
Fig. 6 is a diagram showing the voltage-time discharge characteristics corresponding to the intensity of light, Fig. 17 is a diagram showing the relationship between the golf swing state and the infrared emission signal, Fig. 18 is a block diagram of the electrical circuit of the transmitter/receiver, Fig. 19 shows the electrical block diagram of the received light signal strength detection section, Fig. 20 shows the circuit diagram of the voltage value detection part, Fig. 21 shows the electrical circuit block diagram of the repeater, and Fig. 22 shows the measurement program. Figure 23 is a flowchart of the memory read program. 1... Golf club head, 2... Transmitter/receiver, 3... Repeater, 20... Transmitter/receiver case, 2
1, 22... Infrared light emitting element for measurement, 23... Infrared light emitting element for search, 241... Left infrared light receiving element, 242... Right infrared light receiving element, 25...
LSI, 26...Display section, 261...Notification section, 27
...Key operation section, 28...Fixing pin, 29...
Battery, 30... Repeater case, 31... Infrared light emitting element, 32... Infrared light receiving element, CLK... Basic clock signal, t0 to t7... Bit signal, S...
Infrared emission signal of the transmitter/receiver, S0... Infrared emission signal for measurement, S1000... Infrared emission signal for search (once every 1000ms), S100... Infrared emission signal for search (once every 100ms), S1... Infrared emission signal for search (once every 1 ms), Y... Light receiving element 24
Light receiving signal for measurement according to 1, Z...light receiving element 242
Light reception signal for measurement, , SL...sampling time, DC
1, DC2...discharge time, V1, V2...sampling voltage, VP1, VP2...peak voltage corresponding to light intensity, VC1, VC2...discharge voltage, T
1, T2... Time corresponding to the intensity of light, D0...
Distance between the transmitter/receiver and the repeater, D1...Distance between the light receiving element 241 and the repeater where the light intensity is the highest, D2...
...Distance between the light receiving element 242 and the repeater where the light intensity is the highest, D3... Value of D1-D2, C... Capacitor for detecting discharge time, R... Resistor for detecting discharge time, CR... C and R time constant, Vth...threshold voltage for detecting discharge voltage, T...various times,
α: Radiation angle of infrared light emitting element for measurement, θ: Angle of swing trajectory.

Claims (1)

[Claims] 1. During a golf swing, a repeater consisting of a light-receiving element that receives a signal, a delay circuit that delays the received signal, and a light-emitting element that emits the delayed signal is attached to the shaft of the golf club, and the transmitter/receiver Set the front side perpendicular to the ground, and
Two measurement infrared light emitting elements with narrow directivity that emit light emission signals are provided above and below the front of the transmitter/receiver so that the radius portions of two small irradiation circles formed in the space overlap, and When the repeater passes through the two irradiation circles, the two infrared light receiving elements with wide directivity receive the infrared light emitted by the repeater as a reception signal and convert it into a voltage value. A left side light reception signal strength detection section is provided on the left and right sides of the front of the device, and detects the peak voltage value of the left side reception signal and converts the left side peak voltage value into a discharge time, and detects the peak voltage value of the right side reception signal. A right side light reception signal strength detection section that converts the right side peak voltage value into a discharge time is built into the transmitter/receiver, and the right side light reception signal strength detection section that converts the right side peak voltage value into a discharge time is built in, and the discharge time output from the left and right light reception signal strength detection sections is measured, and the swing of the golf swing is measured. An electronic golf swing practice machine, characterized in that the transmitter/receiver has a built-in LSI that calculates a trajectory direction and a swing trajectory angle.