JPS62104279A - High speed momentary multiplex picture recording device - Google Patents

Abstract

PURPOSE:To facilitate the analysis of a dynamic object by connecting a frame memory receiving a synchronizing signal from a strobe and synchronizing with the flash of a light emitting section via a retarder and displaying plural number of times of momentary poses at the same time on a monitor by plural number of times of flashes of the light emitting section in one frame of a video camera. CONSTITUTION:The video camera 2, a sensor 3 and the light emitting section 4 are installed for the dynamic object 1. The sensor 3 senses the sound or light of a prescribed part of the object 1, e.g., a golf club passing through a prescribed position and sends a detection signal to the retarder 6. The retarder 6 is provided with a delay circuit and sends a lighting signal to a strobe 7 after a prescribed time after the sensor senses. The sensor 3 detects the position of the club just before the impact, the light emitting section 4 flashes and the video camera 2 catches the video image near the impact at the same time and displays it on a monitor 10 in real time.

Description

Detailed Description of the Invention (Industrial Application Field) This invention is a method of swinging a dynamic object, such as a golf club, and capturing a large number of balls and clubs close to the impact +1 in one frame. This relates to a-velocity instantaneous multiple image recording HN for displaying a still image on a monitor at the moment a piece is hit, or for analyzing the speed and spin of a tennis ball immediately after being hit with a tennis racket.

[Conventional technology]

Conventional devices of this type are known to use high-speed video that can send more than 500 frames per second, or to use strobe photography.

[Problems to be solved] With conventional high-speed video, it is not possible to record a large number of still image edges in one frame, and when you want to know the current state of the object, you have to repeat frame-by-frame forwarding or searching.
It was difficult to operate. In addition, high-speed video requires GJ and special lighting, and many unnecessary images are also recorded. Furthermore, with strobe photography, it was not possible to view the image in real time.

In this way, this invention captures many necessary moments of a dynamic object in one frame, eliminates unnecessary images, and as a result eliminates the need for frame-by-frame advance and serving as in conventional high-speed video. An object of the present invention is to provide a high-speed instantaneous image recording device that does not require special illumination and allows viewing only images required for a rear camera.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention installs a video camera sensor and a light emitting unit facing a dynamic object, and provides an Ilj! of this camera to the video camera. Connect a frame memory synchronized by an external signal that receives an image signal and sends one frame of video to the monitor, and connect a strobe to the light emitting section that provides light output to flash multiple times for one frame of the video camera. , a retarder that receives a detection signal from this sensor is connected to the sensor, and the strobe that receives a light emission signal from this retarder is connected to the sensor, and the strobe receives a synchronization signal from this strobe to cause the light emitting section to flash. The above-mentioned frame memory synchronized with the video camera is connected to the video camera via a retarder, and a plurality of momentary poses captured by a plurality of flashes of light from the light emitting unit within one frame of the video camera are simultaneously displayed on the monitor.

(Function) When using this device to record the moment of impact in a golf club swing, for example, the sensor detects when the golf club is swung down to a predetermined position, sends a light emission signal to the strobe via the retarder, and sends a light emission signal to the strobe. The strobe that receives the light output gives a light emission output to the light emitting section, causing the light emitting section to flash, for example, every 2/1000 seconds. When the strobe receives a light emission signal from the retarder, it not only provides a light emission output to the light emitting section, but also generates a synchronization signal to the frame memory via the retarder, and the video camera operates in synchronization with the flash of light from the light emitting section. If you use a commercially available video camera that sends 30 frames per second and operate it for 1 frame, 3
The light emitting section flashes 10 times in 1/0 second.

That is, 10 instantaneous poses are captured within one frame of the video camera and displayed on the monitor in real time.

(Embodiments) Preferred embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a video camera 2 is pointed toward a dynamic object 1.
, a sensor 3 and a light emitting unit 4 are installed.

This video camera 2 may be one that sends a video signal at a speed of 30 units per second, and a special high-speed video camera is not required. A frame memory 5 is connected which receives the video signal from the video camera 2 and sends one frame of video to the monitor 10, which is synchronized with an external signal via a retarder 6'. A retarder 6 that receives a detection signal from the sensor 3 is connected to the sensor 3, and a strobe 7 that receives a light emission signal from the retarder 6 is connected to the retarder 6. When the strobe 7 receives a light emission signal, it gives a light emission signal to the light emitting section 4, so that the light emitting section 4 flashes a plurality of times for one frame of the video camera. This light emitting section 4 is set to flash once every 2/1000 seconds. The strobe 7 outputs light emission to the light emitting section 4 and also sends a synchronization signal to the frame memory 5 via the retarder 6'. When the frame memory 5 receives this synchronization signal, the video signal of the video camera 2 is frozen in the frame memory 5, and the monitor 10 displays 1! Outputs image output. The frame memory 5, which has received the video signal from the video camera 2, sends a video output to the monitor 10, and the video signal from the video camera 2 is sent to the monitor 10.
A plurality of instantaneous poses captured by a plurality of flashes of light from the light emitting unit 4 within a frame are displayed simultaneously, that is, as a -image.

The frame memory 5 outputs video to a monitor 1o as well as to a video tape recorder (VTR) 8.
It is also possible to output an image and record this image on a VTR8. Furthermore, by connecting the frame memory 5 to an image analysis system 9, it becomes possible to analyze trajectory, velocity, angular velocity, etc. The image analysis system 9 includes a digitizer-1 image processing device and the like. The sensor 3 is configured to detect sound or light when a predetermined location on the dynamic object 1, for example, a golf club, passes a predetermined location. For example, using a phototube, the sensor 3 sends a detection signal to the plow retarder 6 when the golf club reaches a predetermined position.

The retarder 6 has a built-in delay circuit, and transmits a light emission signal to the strobe 7 for a predetermined period of time after the sensor senses it.

When diagnosing a golf swing using this device, when Breyer stands at a predetermined position and swings the club down, the sensor 3 detects the position of the club from just before the moment of impact, the light emitting unit 4 flashes, and at the same time the video Camera 2 captures images near the impact, and monitor 10 captures images in real time.
Copy the image to

When the image analysis system 9 is connected to the frame memory 5, it is possible to not only visually check the direction of the spin or spin by marking the ball or club, but also to display it numerically. It becomes possible.

The first reason is that an example is shown in which one Video Camera 2 is used, but it is possible to install two or more to obtain images with different angles. For example, due to m shadows from the front and above,
You can clearly see the condition of the club and ball, as well as the player's attitude and effort. In addition, not only the instant i#l shadow of the golf club's impact, but also various collision phenomena by changing the angle! ! By reducing the speed by 1%, it is possible to easily analyze the speed and spin state.

FIG. 2 shows an outline of a device for analyzing the speed and spin of a tennis ball (dynamic object 1) immediately after being hit by a player 12 with a tennis racket 11, and the basic configuration is the same as that shown in FIG. be.

Reference numeral 13 is a ball launcher, and reference numeral Ji! 14, 15, and 16 indicate a delay, a light ben, and a personal computer, respectively. In this @ position, the sensor 3 moves the dynamic object 1 (tennis ball) in a space with a certain area.
It is configured to work when passed. To explain this sensor 3 in detail, there are two sensors at a certain interval! ! Set up 30°31 and stand on one side! 130 is provided with a laser emitting unit 32, and both opposing vertical walls 30, 31
A mirror 33 for reflecting the laser light emitted from the radar light emitting section 32 is provided on the opposite surface of the mirror 33, and the laser light reflected by the mirror 33 is received by the light receiving section 34. For example, in FIG. 3, a laser beam is irradiated from the upper right toward the mirror 33 of the standing wall 31 (slightly downward), and is repeatedly reflected by the left and right mirrors 33. It is configured to form a light surface. In the example of FIG. 3, three laser emitting parts 32 and 3
A plurality of light receiving sections 34 are provided to prevent attenuation of the light from the sea 11 that is successively reflected. When a tennis ball crosses the plane of this laser beam, an effect similar to that described in FIG. 1 occurs, allowing multiple shots of tennis balls to be taken on the same screen. In addition, stand facing the laser beam! ! ! Of course, the light may be reflected from the bottom to the top instead of from the top to the bottom of 30.31.

The distance between the left and right mirrors 33 is 1.0OOnue or more, and the light is vertically adjacent to the mirror due to repeated reflections.The distance between the lights is 55am.
The following is desirable. This sensor 3 can be called a surface trigger, so to speak.
can be used to take multiple shots of balls used in baseball, table tennis, rugby, soccer, and other ball games. Furthermore, human body movements such as judo can also be imitated.

Although the retarder 6,6' and strobe light 7 are not shown in FIG. 2, it goes without saying that they are used.

〔effect〕

As explained above, according to the present invention, a video camera, a sensor, and a light emitting unit are installed facing a moving object, the video camera receives the video signal of the camera, and the video signal for one frame is sent to the monitor. A frame memory that is synchronized by an external signal is connected, a strobe that provides light output to flash multiple times for one frame of the video camera is connected to the light emitting part, and a retarder that receives the detection signal from this sensor is connected to the sensor. and connecting the strobe to the retarder to receive a light emission signal from the retarder;
The frame memory that receives the synchronization signal from the strobe and synchronizes with the flash of the light emitting part via a retarder is connected to the strobe, and the monitor displays multiple flashes of the light emitting part within one frame of the video camera. ! ! Since several instantaneous poses are displayed at the same time, it becomes easy to analyze dynamic objects. Also, unlike traditional strobe photography,
You can capture still images while the surroundings remain bright.

Also, since many instantaneous poses are recorded in one frame,
It is economical because unnecessary images are eliminated from the beginning.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a preferred embodiment of the device, FIG. 2 is a schematic diagram of the device for photographing a tennis ball, and FIG.
It is a horizontal perspective view of the sensor shown in the figure. 1...Dynamic object, 2...Video camera, 3...Sensor, 4...Light emitting unit, 5...Frame memory , 6・6'... Retarder, 7... Strobe, 10... Monitor.

Claims (1)

[Claims] 1. A video camera, a sensor, and a light emitting unit are installed facing a dynamic object, and the video camera receives a video signal from the camera and is synchronized by an external signal that sends one frame of video to a monitor. Connect a frame memory to the camera, connect a strobe to the flash unit that provides the light output to flash multiple times for one frame of the video camera, and connect a retarder to the sensor to receive the detection signal from this sensor. Connect the strobe that receives the light emission signal from the retarder to the retarder, connect the frame memory that receives the synchronization signal from the strobe to the strobe and synchronize with the flash of the light emitting unit via the retarder, and connect the video camera to the monitor. A high-speed instantaneous multiple image recording device characterized by simultaneously displaying a plurality of instantaneous poses captured by a plurality of flashes of light from a light emitting part within one frame. 2. The high-speed instantaneous multiple image recording device according to claim 1, wherein the sensor is configured to be activated when a dynamic object passes through a space having a certain area.