JPS6329550B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an electronic golf practice device.

With recent advances in semiconductor technology, LSIs such as microprocessors are now available at low cost.
A golf practice device using this LSI has been proposed by the applicants. Generally, the movement of the club head during a swing is detected using a magnetic sensor, an infrared sensor, etc., and can display various information regarding the swing, such as club head speed, with great accuracy.

However, in reality, this is not always the case with normal swings, and during practice, there are times when, for example, a take-back is displayed.
Unnecessary display was performed, and the display displayed a situation that was difficult for practitioners to misunderstand.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above, and is to provide a golf practice device that can display data regarding the swing only when a so-called normal swing is performed.

Hereinafter, this invention will be explained based on the drawings.

In the figure, 1 is a base mat provided with a grass-like part 21 on the upper surface (optional) on which a ball is placed, and 22 is a club head 18 during a swing.
The white line parts 2, 3, 4, and 5 of the base mat provided on the ideal orbit center line R are spaced within the base mat 1 at a distance D/2 to both sides of the center line R and a distance L from each other in the orbit direction. The embedded magnetic sensor 7 is a display device, which includes a central processing circuit 15 consisting of a microprocessor (for example, MPD-7502G), which will be described later, a ranking circuit 16, a discrimination circuit 17, and a liquid crystal display element. a display section (display means) 8 and a club selection key 9 that can be operated externally.
Similarly, the carry/head speed switching key 10
is provided.

Next, the processing calculation circuit block of various information regarding the swing will be explained according to FIG.
Reference numerals 2, 13, and 14 denote amplifying circuits that input the detection signals output from each of the sensors 2, 3, 4, and 5 that detect the passing of the club head 18 directly above, amplify the amplified signals by a predetermined factor, and output the amplified signals; 16 is each amplifier circuit 1
A ranking circuit 17 inputs the outputs from the sensors 2, 13, and 14 to rank the club head 18 passing through each sensor 2, 3, and 5; A determination circuit 15 outputs a start signal after determining whether the pattern is a ranking pattern.
According to the flowchart in Figure 4, the output from
A central processing circuit processes and outputs club head speed V, face angle α, carry, blow, etc., and numeral 8 represents a display unit which inputs the processing results from this central processing circuit and displays them digitally and graphically. By the way, the calculation of various information regarding the swing may be based on the time tv required to travel between the sensor 2 and the sensor 3 (distance L) and the time difference to required to pass the sensor 3 and the sensor 5. In many cases, it can be said that being able to measure these things immediately indicates a correct swing.

For example, the club head speed V is calculated as V=L/tv, the face angle α is calculated as α=Tan ^-1 [(L×to)/(D×tv)], and the carry is calculated based on the above head speed V and each club head. This can be seen from the fact that the calculation is performed by processing and calculating based on the set data.

Therefore, if the time differences tv and to are not measured, not only will these calculations not be performed, but even common sense suggests that the swing will not be normal.

Therefore, as shown in Fig. 5, the detection signals from the sensors 2, 3, and 5 that are involved in the above-mentioned time difference tv,to are ranked in order of occurrence, and this ranking pattern is compared with a pattern that is considered normal. This system is designed to process and calculate and display the data, thereby preventing the practitioner from being confused by the display of outrageous data about erroneous swings.

Further, in this embodiment, the head speed V
If the calculation result of is smaller than a predetermined value (e.g. 60 m/s), and if the calculation result of face angle α is within a predetermined range (e.g. -20°<α<+20°), the display section 8 indicates that the swing is normal. I'm trying to display it, so it's a good idea to do it whenever you want.

As described above, according to the present invention, in an apparatus that detects the moving state of the club head using a plurality of sensors, and processes and displays the speed of the club head based on the detection signals from each sensor, each Since the processing calculation circuit is activated only when the order in which the club head passes through the sensor matches a preset order pattern, the order pattern must be set as the order pattern in a normal swing state. This allows the data to be displayed only when it is determined that the swing is normal, which does not confuse the practitioner, making it extremely effective as a practice device of this type.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the golf practice device of the present invention, Fig. 2 is a correlation diagram between the modeled sensor and the club head, Fig. 3 is an electric circuit block diagram thereof, and Fig. 4 is a flowchart showing the processing process. The chart shown in FIG. 5 is a diagram showing an example of the determination. In the figure, 2, 3, 4, and 5 are sensors, 8 is a display section (display means), 15 is a central processing circuit, 16 is a ranking circuit, and 17 is a discrimination circuit.

Claims (1)

[Claims] 1. A plurality of sensors that detect the movement state of the club head during the swing and emit detection signals, a processing circuit that processes and calculates the detection signals from these sensors and outputs the club head speed, and a processing result from this processing circuit. and a circuit for receiving detection signals from the plurality of sensors and ranking the club heads that have passed through the plurality of sensors; A discriminating circuit is provided which outputs a signal that causes the processing circuit to process and calculate the club head speed when the ranking pattern matches, and further, the processing circuit does not perform the processing calculation unless there is a signal that causes the processing circuit to calculate the club head speed from the discriminating circuit. A golf practice device characterized by: