JPS6160709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates particularly to display control of a golf practice device.

Conventionally, this type of golf practice device has a sensor that detects the passage of the golf club head and can display information such as club face deviation, club head speed, ball flight distance, etc. based on the detection signal. However, in order to reset this displayed data, you must either operate a separate reset button, or the sensor detects a state in which the club head moves in the opposite direction to the swing direction, that is, takeback. It was something to do.

However, the former method has the problem of being very troublesome to operate, and the latter method also resets when taking a swing address, so if someone who has a habit of addressing uses it, it will be difficult to reset. The display would repeat over and over again, and if the club head was returned to its original position after a swing, the measured data would be inadvertently reset.

The object of the present invention is to provide a golf practice device that eliminates the above-mentioned problems.

An embodiment of this invention will be described below.

1 to 3, 1 is a golf practice device body equipped with a control circuit 30 to be described later, 2 is a display section, 29 is a club selection key, 3 is a base mat,
4 is a grass-like golf mat placed on this base mat, 5 is a white line drawn in the center of this golf mat indicating the swing direction of the golf club head 10, 101 is a face surface of the club head 10,
Reference numeral 11 indicates a golf ball (this example does not require it); 6a, 6b, 6c, and 6d indicate permanent magnets 9a, 9b, 9c, and 9d, and coils 8a, 8b, and 8c wound around the permanent magnets a predetermined number of times; , 8d are housed in highly conductive cases 7a, 7b, 7c, and 7d, 12 is a sensor case in which these magnetic sensors are embedded, and magnetic sensors 6c and 6d are ideal for the golf club 10. On both sides of the center line R of the hitting trajectory and in the vicinity of the ball placement location 111, there is a predetermined distance D/2 (for example, 25 mm) from the center line R.
mm), and the magnetic sensors 6a, 6
b are arranged at a predetermined interval L (for example, 50 mm) toward the golf club entrance side. Further, this sensor case is attached to the base mat 3 and is provided with a signal line 13 for sending a signal from the sensor case to the golf practice device main body 1.

Next, an example of this detection will be explained with reference to FIGS. 4 to 7. When the club head 10 moves in the direction of the arrow during swing in FIG. 4, the output from each sensor will be in the state shown in FIG. 5. Furthermore, this signal is converted into a digital signal as shown in the timing chart shown in FIG. 6, and the time difference tv between the sensor 6b and the sensor 6d and the time difference tx between the sensor 6d and the sensor 6c are detected. Also magnetic sensor 6
Output voltages of a, 6b, 6c, 6d Ea, Eb, Ec,
Ed is converted into a voltage value→time width timing signal by conversion as shown in FIG. 7, respectively.

As described above, various information associated with the next swing can be calculated. [1] Club head speed, [2] Ball flight distance, [3] Face deviation angle, [4] Face impact position, [5]
There are six pieces of information: blow, and [6] ball deviation distance from the target.

[1] Regarding the club head speed, approximately calculate the speed V ₀ by L÷tv.

Next, [2] Ball flight distance is calculated from club data preset for each club and the club head speed.

Next, [3] The face deviation angle is approximately calculated as deviation angle α=Tan ⁻¹ (tx/tv×L/D).

Next, [4] Regarding the face surface impact position,
The impact position on the face surface 101 of the club head 10 is calculated by comparing the time width Tc and the time width Td.

Next, [5] Regarding the blow, the moving direction of the club head 10 is calculated by comparing the time width Ta and the time width Tb, and the time width Tc and the time width Td.

Furthermore, [6] The ball deviation distance from the target is calculated from the flight distance of the ball based on the face plane deviation angle and the blow.

To explain in detail the control circuit 30 of the present invention using the detection principle as described above, 1 is shown in FIG.
4a, 14b, 14c, 14d are magnetic sensors 6
Amplifying unit 15a, 15b, 15c, 1 that amplifies the signals from a, 6b, 6c, 6d by a predetermined magnification
5d is the widening part 14a, 14b, 14c, 14d
SN discrimination section that discriminates only the necessary signals from the output from the
16a, 16b, 16c, 16d are SN discriminator 1
The outputs from 5a, 15b, 15c, and 15d are amplified by a predetermined magnification to produce amplified signals ea, eb, ec, and ed, respectively.
The amplification units 17b, 17c, and 17d output the amplification signals eb, ec, and ed into pulses, respectively.
Zero cross detection unit that generates Zb, Zc, and Zd, 18
a, 18b, 18c, 18d are the amplified signals ea,
The voltage value is obtained by holding the peak values of eb, ec, and ed.
Peak hold section that generates Ea, Eb, Ec, Ed,
19 generates a signal S from the pulse signals Zb and Zd,
a counting circuit for detecting time tv from this signal S, 2
0 is a counting circuit 21 that generates a signal D from the pulse signals Zc and Zd and detects the time tx from this signal D.
is an analog calculation unit that generates time signals Ac and Ad based on signals ST and En from voltage values Ec and Ed,
23 is an analog calculation unit that generates time signals Aa and Ab based on signals ST and En from voltage values Ea and Eb; 22 is an analog calculation unit that generates time signals Ac, Ad, Aa, and Ab from voltage values Ea, Eb, Ec, and Ed, respectively; The corresponding time span Ta,
Regarding Tb, Tc, and Td, the analog calculation unit 32 calculates the magnitude comparison and time difference between the time width Tc and the time width Td and between the time width Ta and the time width Tb, and outputs the respective results; 32 is a counting circuit 19; , receiving the respective outputs from the counting circuit 20, the analog calculation section 21, the analog calculation section 23, and the analog calculation section 22, calculates [1] club head speed, [2] flight distance, [3] face deviation angle, [4] A central calculation unit that calculates the face impact position, [5] blow, and [6] ball deviation distance from the target. 26 is a RAM that temporarily stores the data calculated by this central calculation unit.
31 is a ROM section in which a program for controlling the flowchart shown in FIG. 9 is stored; 27 is controlled by this ROM section, and RAM
26, a reset signal generating section that generates a reset signal for resetting a display section 28, which will be described later; 25, a central processing section 32, a RAM section 26, and a ROM section 3;
1. A central processing circuit comprising, for example, a microcomputer, having a reset signal generating section 27; 2.
4 is this central processing circuit and counting circuit 1
9, a control unit that generates a timing signal to control the counting circuit 20, analog calculation unit 21, analog calculation unit 23, and analog calculation unit 22; 29, a club that selects club data that is preset and stored for each club; Selection key, 2 is the corresponding
This is a display section that displays the memory contents of the RAM section.

With the above configuration, by pressing the club selection key 29, selecting the club to be used, and swinging, various information regarding the swing is detected and displayed. However, while swinging many times, the robot may sometimes fail to pass over the sensor group, or may accidentally shake the sensor lightly, but in these cases, the previous display state is retained. In this embodiment, it is better to set the number 9, and if the swing is correct, it is necessary to automatically reset the previous display data and display the current swing information.
These are controlled by a flowchart as shown in the figure. In FIG. 9, the control circuit 30
is reset to the initial state and waits for detection signals from the sensors. It is determined whether or not the detection signals from the sensors 6b and 6d are detected. If YES, the head speed V ₀ is calculated from these sensors. . This head speed V ₀ is within a certain range, for example 0.1 m/sec.
It is determined whether or not it is within the range of ≦V ₀ ≦60 m/sec, and if NO, it is determined that the swing is incorrect (for example, a trial swing on approach) and the process returns to _S2 .
If YES, various information is calculated as a correct swing, and the RAM unit 26 and display unit 2 are reset. Next, it is determined whether the display section 2 and the RAM section 26 have been reset, and if NO, _S7 is repeatedly executed. When it becomes YES, RAM section 26
The data is stored in and the contents are displayed on the display section 2.

The reason for setting a lower limit and an upper limit for club head speed here is that, for example, the lower limit is set to the lowest speed for a putter, and the upper limit is about 55 m/sec even for a professional golfer, and the electromagnetic This is set to exclude cases where the sensor malfunctions and is detected due to disturbance noise such as noise.

In this example, a correct swing is defined as a case where the head speed V ₀ is within a certain range, but any head speed above a predetermined value may be considered a correct swing. This can be expected to be effective, and if there is a club head detection signal from at least one of the sensors, it may be possible to indicate a correct swing. Also, it is obvious that the number of sensors is not limited to four.

Therefore, according to the present invention, there is provided a sensor for detecting the state of the club head during a swing, a means for processing a detection signal from the sensor, a storage section for temporarily storing calculation results related to the swing processed by the sensor, and this memory. and a reset signal generation means for generating a reset signal for resetting the storage section, and the reset signal generation means is configured to detect that the club head speed data processed by the processing means is within a predetermined range. Alternatively, since a reset signal is generated when the value exceeds a predetermined value, the content displayed on the display section can be automatically updated only when a normal swing is performed, and the club head can be returned to its original position after a swing. Even if the head passes over the sensor, it is not reset unless the head speed satisfies a predetermined condition, so there is no problem of inadvertently erasing data, and the usability is further improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is an elevation view thereof, FIG. 3 is a view showing the plane and elevation of the magnetic sensor, and FIG. 4 is a club head as an example of a swing. Figure 5 is a waveform diagram of the amplified sensor output in the case of Figure 4, Figure 6 is its timing chart, and Figure 7 is the time for each sensor output peak voltage value. FIG. 8 is a control circuit block diagram, and FIG. 9 is a flowchart for generating a memory reset signal. In the figure, 1 is the golf practice device body, 2 is the display section, and 6
10 is a club head, 25 is a central processing circuit, and 26 is a magnetic sensor.
A RAM section, 27 a reset signal generating section, 30 a control circuit, 31 a ROM section, and 32 an arithmetic section.
In each figure, the same reference numerals indicate the same parts.

Claims (1)

[Claims] 1. A sensor that detects the movement state of the golf club head during swing and generates a detection signal, means for processing the detection signal from this sensor, and a storage section that stores data processed by the processing means;
a display section that displays the data stored in the storage section as information regarding the swing; and a reset signal generating means that generates a reset signal that resets the storage section when a club head detection signal is generated in the sensor; A golf practice device characterized in that said reset signal generating means generates a reset signal when the club head speed data processed by said processing means is within a predetermined range or exceeds a predetermined value.