JPH0928852A - Driven ball target - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit that a ball hits on a sheet in a frame body by removing a low frequency component by converting a change in a resistance value of a strain gauge stuck to the sheet in the frame body into a signal of an electric current change, and operating an report mechanism when its signal exceeds a specific value. SOLUTION: An outer ring 2 and an inner ring 3 as a frame body are integrally formed in a concentric shape with a sheet 1 in a central part of the sheet 1 in the shape of sandwiching the sheet 1 in an inside filling groove. An installing plate 5 as a shock absorbing material is arranged on the sheet 1 of a central part of the inner ring 3, and a strain gauge 6 is installed on it, and is connected to a hit signal output circuit arranged in the other place. An output waveform of this hit signal output circuit is converted into an electric signal by a converting circuit, and a signal having a frequency lower than a shock signal when a ball hits on it is eliminated by a filter circuit, and only a signal not less than a specific value is outputted from a level detector. A driving signal to drive an report mechanism is outputted for a constant time from an output circuit by receiving its signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hitting range such as a golf range, and when a ball is hit, a target signal for generating a notification signal indicating that the ball is hit is generated. Regarding

[0002]

2. Description of the Related Art Flying ball targets provided in golf driving ranges and the like, which have a device for detecting the impact of a ball, have a yardage plate. This is because a net is provided in a certain area on the yardage plate, and when a ball enters the switch, a limit switch etc. is provided at the bottom of the net to allow the ball to fall in the net. Activating a signal, a plate-shaped pressure receiving plate with an impact sensor attached to the ground below the front of the yardage plate, and the ball that hits the yardage plate drops and falls on this pressure receiving plate. In some cases, the sensor emits a signal. However, these are all installed on the ground, and when installed in the air, the former must secure a passage for the ball and the structure becomes complicated, and the latter has a heavy pressure plate, so both are expensive. Difficult to install in position.

[0003]

[Problems to be Solved by the Invention] When a ball hits a target, for example, a seat portion having a logo mark, which is posted on a shield such as a net in a batting practice field, some notification means is operated. I have a wish. As a means for simply detecting and notifying an impact, the method described in the above conventional technique is conceivable, but since the structure is complicated or heavy, it is difficult to install it at a high position such as a net, It is possible to reduce the weight by attaching a strain gauge to the seat etc. and detecting subtle changes in the seat due to impact when the ball hits, but the net is constantly swaying due to wind etc. It vibrates even if the ball hits. Therefore, it cannot be distinguished whether the ball is hit or not, which makes the ball impractical.

Therefore, if a frame is partially provided and only the inside of the frame is taut, the way the seat sways will be different between when the ball hits that part and when it hits another part. There is. An object of the present invention is to utilize the principle and output a signal for activating a notification mechanism when the ball is hit.

[0005]

In order to solve the above-mentioned problems, in a flying ball target of the present invention, a frame fixed to a shielding body facing in the flying direction in a batting practice range of a ball shielded by a net or the like. The body and the seat stretched in the frame,
A strain gauge attached to the sheet, a conversion circuit that converts a change in resistance of the strain gauge into a change in current, a high-pass filter that removes low-frequency components from the converted current change signal, and the high-pass filter It is provided with a detection means for detecting that the signal passed through exceeds a certain value, and a notification means for receiving the detected signal and operating an arbitrary notification mechanism. The frame body is preferably attached to the shield body via a cushioning body so that the vibration from the shield body is hard to be transmitted. Further, in order to easily maintain the tensioned state of the sheet in the frame, the sheet in the front and back may be formed into a balloon shape by pressurizing air between them. Further, in order to enhance the advertising effect of the batting practice field, the frame mounting position and the logo mark posting position of the batting practice field can be made to coincide with each other.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to the drawings, an embodiment will be described. A shield for a tens of meters square formed of a net or the like is used to display a facility logo mark or the like at an appropriate place. A sheet with a size of ~ 3 meters square is provided, but as shown in Fig. 1, the sheet with the logo mark etc. is displayed.
The outer ring 2 as a frame and the inner ring 3 are
The sheet is concentrically integrated with the sheet by sandwiching the sheet by the respective insertion grooves. The inner ring 3 is
It is divided into four parts, and when attached to the seat, an appropriate gap is provided in order to prevent stress such as wind from concentrating on the divided part and damaging the seat. Each of the arcuate ring pieces of the outer ring 2 and the inner ring 3 has a total of twelve springs 4, each of which is three in number, and is attached in a radial direction from the center of the ring as shown in FIG. The outer ring pulls each of the four arcuate pieces.

With this structure, the inner sheet 1a of the inner ring 3 which is the target is pulled in all directions,
The seat 1 outside the ring, which is always in a tense state and is attached to a shield such as a net, acts as a cushioning member, so that even if the shield is flapped by wind or a ball hits the shield, the ring The inside is pressed to the extent that it shakes slowly without rattling. Therefore, when a ball hits the seat in the inner ring 3, a strong shock wave different from a small and gentle vibration due to the wind or the like is generated, so that it is possible to distinguish between the two vibrations.

As the sheets 1 and 1a, commonly used ones such as a cloth for a flag and vinyl and vinyl are used. The outer ring 2 and the inner ring 3 can be made of metal, synthetic resin, or the like, but it is preferable to use synthetic resin from the viewpoint of weight reduction. Further, the spring 4 need not be a metal as long as the sheet in the inner ring 3 is an elastic body having a tension such that it does not flutter due to wind or the like, and synthetic resin, rubber or the like can also be used. Also, the number of attachments was three, but the number is not limited to this number. And on the seat in the center of this ring,
A mounting plate 5 is provided as a shock absorbing material, a strain gauge 6 is mounted thereon, and it is connected to a hit signal output circuit 10 provided elsewhere by an electric cord. By configuring in this way, the target has a light and simple structure,
Since it can be installed in the air and the ring is always in a tension state, only the hit signal of the ball can be detected.

In the second embodiment shown in FIG. 3, the entire surface of one side of a balloon-shaped disk 8 in which air is hermetically sealed is attached to the vicinity of the center of the sheet 1, and the circumference of the balloon-shaped disk 8 is ring-shaped. It is fixed to the seat at 9. By doing this,
The balloon-shaped disk 8 is always strained, and like the above-described embodiment, even if the shield is swung by the wind or hits a ball on the shield, the vibration is suppressed to the extent that it slowly shakes. As shown in FIG. 4, a mounting plate 5 having a strain gauge 6 mounted thereon is attached to the balloon-shaped disk 8.

FIG. 5 shows a hit signal output circuit 10 of the present invention.
The following shows an example. This output circuit 10 converts a ball impact signal generated by the strain gauge 6 into an electric signal by a conversion circuit 11 and amplifies it, removes low frequency components such as vibration noise due to wind by a high-pass filter 12, and further serves as a detection means. The level detector 13 is provided to cut weak signals other than those due to the impact of the ball. Then, the signal from the level detector 13 is outputted to the output circuit 14 as an informing means for outputting a signal for operating an arbitrary informing mechanism.
Is provided.

The output waveform of each block of the hit signal output circuit 10 is shown in FIG. The signal from the strain gauge converted into the electric signal in the conversion circuit 11 is a signal having a certain magnitude or more, in which the noise signal such as wind having a lower frequency than the impact signal when the ball hits is deleted in the filter circuit 12. That is, only the ball impact signal is output from the level detector 13. Then, upon receiving a signal from the level detector, a drive signal for driving the notification mechanism is output from the output circuit 14 for a certain time t. With this configuration, since only the signal generated when the ball is hit is selected and the drive signal is output, there is no malfunction of the notification mechanism.

The hit signal detection range can be expanded to a certain range outside the frame by adjusting the filter circuit 12 and the level detector 13 of the output circuit.
Although the embodiments have been described as targets for golf practice, they are preferably used in batting centers, other ball game practice fields, etc. in addition to golf practice fields.

[0013]

According to the present invention described above, the target can be installed on the upper part of the shield in the ball striking range, and when the ball hits the target, that is, when the ball hits the seat in the frame, or When the ball hits a seat within a certain range outside the frame, it can emit a signal,
This signal can be used for playing effects such as blinking of a lamp for notifying that the ball has hit and playing music.

[Brief description of drawings]

FIG. 1 is a front view when a ring and a spring are used in a first embodiment according to the present invention.

FIG. 2 is a sectional view of the first embodiment.

FIG. 3 is a front view when a balloon-shaped disc is used in the second embodiment according to the present invention.

FIG. 4 is a sectional view of a second embodiment.

FIG. 5 is a block diagram of a hit signal output circuit that detects a signal due to a ball impact.

FIG. 6 is an output waveform explanatory diagram of each block of the hit signal output circuit.

[Explanation of symbols]

1 ... Sheet, 1a ... Target sheet, 2 ... Outer ring, 3 ... Inner ring, 4 ... Spring, 5 ... Mounting plate, 6 ... Strain gauge, 8 ... Balloon disk, 9 ...
・ Ring-shaped frame, 10 ・ ・ Hit signal output circuit, 11 ・
・ Shock signal conversion circuit, 12 ・ ・ High-pass filter, 1
3 ... Level detector, 14 ... Output circuit

Claims (4)

[Claims] 1. A frame body fixed to a shield body facing the direction of flight in a ball hitting practice field of a ball shielded by a net, a sheet stretched in the frame, and a strain attached to the sheet. A conversion circuit that converts the change in resistance of the gauge and its strain gauge into a change in current, a high-pass filter that removes low-frequency components from the converted current change signal, and the signal that has passed through the high-pass filter has a constant value. A flying target comprising: a detection means for detecting that the temperature exceeds the limit, and a notification means for operating an arbitrary notification mechanism in response to the detected signal. 2. The flying ball target according to claim 1, wherein the frame body is attached to the shield body via a buffer body. 3. The flying ball target according to claim 1, wherein the sheet is composed of two front and back surfaces, and air is pressed into the sheet to inflate in a balloon shape. 4. The flying ball target according to claim 1, wherein the frame mounting position is coincident with the logo mark posting position on the batting practice field.