JPS6397182A - Apparatus for measuring speed of hit ball - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a pair of hitting tools for hitting a ball such as a tennis racket. The object of the present invention is to provide a ball speed measuring device that can be displayed as visual measurement data.

``Prior Art'' Conventionally, a predetermined arm is provided protruding from the floor surface, the external mechanical force applied to the arm is detected as an electrical signal, and based on this detection signal, for example, the flight distance of a golf ball is determined. Measuring devices have been developed that convert signals into equivalent data and display the contents.

``Problems to be solved by the invention'' However, according to the conventional measuring device described above, the arm is installed on the floor, which makes installation troublesome and requires a space with an appropriate floor area. In particular, it has been impossible to measure the speed of a ball hit by a paired hitting tool such as a tennis racket.

"Means for Solving the Problems" The present invention was developed in view of the above problems, and includes:
A detection sensor that is installed in the main body of a paired hitting tool such as a tennis racket or in a separate device attached to the same, and that detects vibrations when one hitting tool hits, and at least a counterattack of the other hitting tool. A calculation process that includes a transmitter for a return ball signal transmitted based on vibrations in time, a receiver for receiving the signal, and a reset switch, and starts counting based on the detection signal of the sensor and stops counting based on the return ball signal. The measuring device includes a measuring device including the measuring device, and a display device that displays the contents of the measuring device.

"Function" In the above configuration, for example, by providing a sensor on one side of the tennis racket's main body to detect vibrations at the time of hitting, the measuring device including the arithmetic processing device starts counting based on the detection signal. A wireless transmitter/receiver or the like receives a return ball signal when the ball is hit with the other hitting tool that is paired with the ball, and the counting of the measuring device is stopped based on this return ball signal. The speed of the ball can be measured relative to the distance displayed on the display device connected to the open side device.

“Example” The present invention will be explained with reference to an example shown in the figure below.
is the main body of a hitting tool that is a companion to a tennis racket, etc.,
Sensors 4 are installed in the handle part 2 of the main body 1 or in separate bodies 3 that are detachably attached to the handle part 2 with a belt or the like, and detect vibrations when one of the striking tools hits. For example, as shown in FIG. 2, it consists of a cylindrical electrode 41 and a weighted electrode 42 attached to the end of a spring in the center, forming a switch that is closed when an image is taken. On the other hand, at least the other hitting tool is provided with a sensor 21 for detecting vibrations when the ball is hit back, and a transmitter 22 for transmitting a return signal based on the detection signal of the sensor 21. The device body 3 is also provided with a receiver 5 for receiving the signal, and a measuring device 7 including a reset switch 6 and an arithmetic processing device that receives the detection signal from the sensor 4 and the return signal from the receiver 5 as inputs. The counting is started by the detection signal of the sensor 4, and the counting is stopped by the return signal. A digital display device 8 such as a liquid crystal display is provided on the output side of the measuring device 7 to display the contents of the count via a drive circuit.

With the above configuration, when the reset switch 6 is pressed to reset the contents of the counter of the measuring device 7 and a ball is hit with the main body 1, a detection signal is generated from the detection sensor 4 due to the vibration at the time of the hit. The measuring device 7 starts counting based on the detection signal. On the other hand, based on the operation of the sensor 21 that detects vibrations when the ball is hit back with the other matching hitting tool, a return ball signal is output from the wireless transmitter 22, and this signal is received by the receiver 5. The counting of the measuring device @7 is stopped by the signal, and its contents are displayed on the display device 8. Thereby, the speed of the batted ball can be determined relatively based on the display content of the display device 8 in accordance with the distance therebetween.

``Effects of the Invention'' As described above, when hitting a ball with a paired hitting tool like a tennis racket, a sensor detects vibrations when the ball is hit, and a sensor that detects the vibrations when the ball is hit back via a transmitter such as a wireless one. The measurement device including the arithmetic processing unit is operated based on the signal from the sensor that detects vibration, and the contents of the counter can be visually displayed on the display device, so the relative Ball speed can be easily measured.

In addition, there is no need to place the measuring device on the floor, etc., unlike conventional golf ball hitting measuring devices, and it can be easily configured in the main body of the paired hitting tool or in the container attached to it, and can be used indoors or outdoors. It can be used without distinction, and there are no restrictions on where it can be used.

It should be noted that the sensor for detecting vibrations during a return ball and the transmitter for transmitting a return signal are not necessarily provided on the other hitting tool, but may be provided on a desired wall surface, for example. Further, the sensor for detecting the vibration when the ball is hit is not limited to the structure of the above embodiment, and may be any other sensor such as a tuning fork. Further, the transmitter/receiver for receiving the return ball signal when the ball is hit back from at least the other hitting tool is not limited to radio waves, and may be any medium such as ultrasonic signals or optical signals such as infrared rays.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of a hitting tool incorporating a ball-hitting speed measuring device according to an embodiment of the present invention, FIG. 2 is a cutaway side view of the main parts of the detection sensor, and FIG. 3 is the same ball-hitting speed measuring device. FIG. 2 is a block diagram showing the configuration of main parts. In the figure, 1 is the main body, 2 is the handle, 3 is the container body, 4 is the sensor, 5 is the receiver, 6 is the reset switch, 7 is the measuring device,
8 is a display device, 21 is a sensor, and 22 is a transmitter.

Claims (1)

[Claims] A detection sensor that is installed in the main body of a paired hitting tool such as a tennis racket or in a separate device attached to the same, and that detects vibrations when one hitting tool hits, and at least a counterattack of the other hitting tool. A calculation process that includes a transmitter for a return ball signal transmitted based on vibrations in time, a receiver for receiving the signal, and a reset switch, and starts counting based on the detection signal of the sensor and stops counting based on the return ball signal. A batted ball speed measuring device comprising: a measuring device including the measuring device; and a display device displaying the contents of the measuring device.