JPH0262524A - Rotary body photographing device - Google Patents

Abstract

PURPOSE:To take a picture in the same state with the stopping of a rotary body without using a high-shutter-speed photographing machine by outputting a synchronous lighting command signal to a stroboscopic device according to a pulse signal from a rotary body pulse detector and a shutter signal from the photographing machine. CONSTITUTION:A picture is taken by utilizing the stroboscopic device and an optical fiber 7 while the rotational state of the rotary body 2 in a case 1 is monitored. The rotating speed of the rotary body 2 is detected as the pulse signal P by a rotary body pulse detector 5. This pulse signal P and the shutter signal S from the photographing machine 4 are inputted to a switching circuit 8 and when a shutter ON signal and a switching ON signal indicating a desired photographic position in the pulse signal P are inputted at the same time, the synchronous lighting command is outputted to the stroboscopic device 6. Consequently, a photographic part of the rotary body 2 is irradiated with light from the stroboscopic device 6 through the optical fiber 7, the photographing machine 4 enters exposing operation for the lighting time of the stroboscopic device 6, and the desired place of the rotary body 2 is photographed in a motion stop state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotating body photographing device for photographing a rotating body existing inside a case, such as a rotating body inside a transmission case.

(Prior Art) Conventionally, as a rotating body photographing device, for example, the tip of a fiberscope connected to a light source device is placed on a rotating body existing in a case, and a camera is connected to the rear end of the fiberscope. An endoscopic imaging system designed to do this is known.

(Problems to be Solved by the Invention) However, with such conventional devices, it is difficult to: ■ Record the movement of a rotating body in large numbers using a high-speed video or high-speed camera, and then take one photo out of them. Take it out and stop the movement of the rotating body to view it, or use a high-intensity light source to measure the 35mm 5L
Using R camera, high speed shutter (+72000se)
Since this was done by taking photos of class C), there were the following problems.

In case (2), the movement of the rotating body can be stopped by increasing the number of images recorded, but the resolution of the resulting photographs will be extremely low.

In the case of (2), although the resolution of the photograph increases, since the shutter is released at an appropriate position based on intuition alone, it is not possible to obtain a photograph of the same state with the rotating body still.

The present invention has been made in view of the above-mentioned problems, and it is possible to minimize the number of shots without using a camera with a high shutter speed, to stop the movement of the rotating body, and to obtain extremely high-resolution images. The objective is to develop a rotating object photographing device that can take photographs.

(Means for Solving the Problems) In order to solve the above problems, the rotating object photographing device of the present invention uses a strobe capable of high-speed light emission and an optical fiber to take images while monitoring the rotational status of the rotating object. .

In other words, as shown in the complaint correspondence diagram in Figure 1, Case 1
In this rotating body photographing device, the tip of a fiber scope 3 is placed on a rotating body 2 existing inside the body, and a photographing device 4 is connected to the rear end of the fiber scope 3. A rotating body pulse detector 5 that detects signals is provided, and an optical fiber 7 that irradiates strobe light from a strobe light 6 capable of high-speed light emission is arranged in the photographing part of the rotating body 2. A pulse signal (P) and a shutter signal from the camera 4 (
input the shutter ON signal and the pulse signal (
P) The means is characterized in that it is provided with a switching circuit 8 which outputs a synchronized light emission command signal to the strobe 6 when a switching ON signal indicating a desired photographing location is input at the same time.

(Function) When photographing a rotating body while rotating the rotating body at a position where the rotating direction is synchronized, the switching circuit 8
A pulse signal (P) from a rotary body pulse detector 5 that detects the rotational speed of the body using a pulse signal and a shutter signal (S) from the camera 4 are input, and a shutter ON signal and a pulse signal (P) are input. When a switching ON signal indicating a desired photographing location is input at the same time, a synchronized light emission command signal is outputted to the strobe 6.

In response to this synchronized light emission command signal, the photographing part of the rotating body 2 is irradiated with strobe light from a strobe 6 capable of high-speed light emission via an optical fiber 7, and the camera is exposed only for the time the strobe 6 emits light. A desired location on the rotating body can be photographed while the body is stationary.

(Example) Embodiments of the present invention will be described below based on the drawings.

First, the configuration will be explained.

As shown in FIG. 2, the rotating body photographing device of the embodiment has a distal end 13a of a fiberscope 13 disposed on a rotary body 12 present in a transmission case 10, and a rear end 13b of the fiberscope 13. A camera 14 having an adapter lens 14a is connected.

Incidentally, a high-intensity light source device 20 is connected to the rear end portion 13b of the fiber scope 13, which is used as an auxiliary light for focusing and framing.

The rotating body 12 is provided with a pulse pickup 15 (rotating body pulse detector) that detects the rotational speed using pulse signals, and the photographing portion of the rotating body 12 is equipped with a photographing strobe 16 capable of emitting high-speed light. An optical fiber 17 is arranged to irradiate strobe light through a condenser lens 21 and an optical fiber entrance section 22.

Incidentally, an exposure control signal from the photographing device 14 is inputted to the photography strobe 16, so that it emits strobe light according to the exposure.

Further, the pulse signal from the pulse pickup 15 (
A switching circuit 18 is provided as an operation control circuit of the device, which inputs the shutter signal (S) and the shutter signal (S) from the photographing device 14, and outputs a synchronized light emission command signal to the photographing strobe 16.

This switching circuit 181, a waveform shaping circuit 18a, an I/N frequency dividing circuit 18b, a counter circuit 18c,
It has a delay circuit 18d and a semiconductor switch 18e, and the waveform shaping circuit 18a includes a pulse pickup 15.
Further, a shutter signal from the camera 14 is input to the semiconductor switch 18e, and a synchronized light emission command signal is output to the photography strobe 16.

Next, the effect will be explained.

When rotating the rotating body 12 inside the transmission case 10 and photographing the rotating body at a position where the rotational direction is synchronized,
In the switching circuit 18, the pulse pickup 1
The detected waveform from 5 (Fig. 3 (a)) is detected by the waveform shaping circuit 18.
The waveform is shaped into a pulse wave of N pulses per revolution at step a (Fig. 3 (0)), and the frequency of the shaped wave is divided into one pulse per revolution by the next 1/N frequency divider circuit 18b (Fig. 3 (0)). c)), the counter circuit 18c counts as ■ and ■ (Fig. 3 (d)), and the delay circuit 18d shifts the phase by a predetermined amount (Fig. 3 (e)), and the semiconductor switch At step 18e, a switching ON pulse signal is generated based on the determination of the desired rotational position to coincide with the location to be photographed (FIG. 3(f)).

When a shutter ON signal (FIG. 3 (g)) from the photographing device 14 is input to the semiconductor switch 18e at the same time as this switching ON pulse signal, the photographing strobe 1
A synchronized light emission command signal (FIG. 3 (H)) is output to 6.

Then, according to this synchronized light emission command signal, strobe light is emitted from the photography strobe 16, and this strobe light is transmitted to the condenser lens 21. Optical fiber light input section 22 and optical fiber 1
The photographing device 14 is exposed only during the light emission time of the photographing strobe 16, and a desired part of the rotating body 12 can be photographed while the photographing strobe 16 is still in motion.

As explained above, since the rotating object photographing device of the embodiment is a device that uses strobe synchronized light emission, the number of images to be taken is minimized without using a high shutter speed photographing device 14. It is possible to obtain extremely high-resolution photographs while stopping the movement of 12.

That is, if a normal single-lens reflex camera is used as the photographing device 14, if the shutter speed is set to 1760 seconds or less, and the part of the rotating body 12 to be photographed rotates while the shutter is fully open, the strobe synchronized flash will be emitted. This allows a desired location to be photographed.

Further, as shown in FIG. 4, the switching circuit 18 is
Adding a timer circuit 18f and connecting a counter circuit 18c to form a feedback circuit,
When the internal circuit is a switching circuit 18° using an AND circuit 18c1 and a count 18C118C3, the signal from the waveform shaping circuit 18a and the signal from the semiconductor switch 18e are compared by the AND circuit 18c1, and the count 18C2, By shifting the count value by a predetermined number in 18C3, it is also possible to shift the image by an arbitrary angle in the rotating direction of the rotating body 12 and take a multiple exposure photograph.

Furthermore, among the devices shown in FIG.
By connecting a V-camera, a television set, and a TV monitor, it is possible to stop the movement of the rotating body 12 and visually observe the status of the rotating body 12.

Furthermore, by using the circuit shown in FIG. 4, a synchronized strobe light, a TV camera, etc., each rotational image is shifted by an arbitrary amount in the rotational direction, and can be observed while slowly moving the rotating body 12.

Although the embodiment has been described above based on the drawings, the specific configuration is not limited to this embodiment, and even if there is a design change within the scope of the gist of the present invention, it is included in the present invention. .

For example, in the embodiment, an example was shown in which a rotating body inside a transmission case is photographed, but the present invention can be applied to any rotating body housed in a case and for which it is desired to know the rotational status of the rotating body.

(Effects of the Invention) As explained above, in the rotating object photographing device of the present invention, the pulse signal from the rotating object pulse detector and the shutter signal from the photographing device are inputted, and the shutter ON signal and the shutter ON signal are input. , A high shutter speed camera is used because a switching circuit is provided that outputs a synchronized light emission command signal to the front two strobes when a switching ON signal indicating a desired layered portion of the pulse signal is input at the same time. The effect is that it is possible to obtain photographs with extremely good resolution while minimizing the number of photographed images and stopping the movement of the rotating body.

[Brief explanation of the drawing]

FIG. 1 is a claim-corresponding view showing a rotating body photographing device of the present invention, FIG. 2 is an overall view showing a rotating body photographing device according to an embodiment, and FIG.
The figure is a signal waveform diagram showing each signal wave in the switching circuit of the embodiment device, and FIG. 4 is a block diagram showing a modification of the switching circuit. 6... Strobe 7... Optical fiber 8... Switching circuit (P)... Pulse signal (S)... Shutter signal

Claims (1)

[Scope of Claims] 1) A rotating body imaging device in which the tip of a fiberscope is disposed on a rotating body existing in a case, and a camera is connected to a rear end of the fiberscope, wherein the rotating body includes: A rotating body pulse detector that detects the rotational speed using pulse signals is provided, and an optical fiber that irradiates strobe light from a strobe capable of high-speed light emission is placed in the imaging part of the rotating body, and the pulses from the rotating body pulse detector are arranged. signal and a shutter signal from the photographing device, and output a synchronized light emission command signal to the strobe when the shutter ON signal and the switching ON signal indicating the desired photographing location among the pulse signals are input at the same time. A rotating body photographing device characterized in that it is provided with a switching circuit that performs the following operations.