JP2832011B2 - Rotating body imaging device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotating body photographing apparatus for photographing a rotating body present in a case such as a rotating body in a transmission case.

(Prior Art) Conventionally, as a rotating body photographing apparatus, for example, a tip of a fiberscope connected to a light source device is arranged on a rotating body present in a case, and a camera is connected to a rear end of the fiberscope. 2. Description of the Related Art An endoscope photographing system designed to perform such operations is known.

(Problems to be Solved by the Invention) However, in such a conventional apparatus, a large number of motions of a rotating body are recorded using a high-speed video or high-speed camera, and one of the pictures is taken out. This was done by stopping the movement of the rotating body and taking a picture, or by taking a picture with a high-speed shutter (1 / 2000sec class) using a 35mm SLR camera using a high-intensity light source. Was.

In the case of (1), the movement of the rotating body can be stopped by increasing the number of recorded images, but the resolution of the obtained photograph is extremely low.

In the case of, although the resolution of the photograph is increased, the shutter is released at an appropriate position only by intuition, so that it is impossible to obtain a photograph in the same state where the movement of the rotating body is stopped.

The present invention has been made in view of the above problems, without using a camera with a high shutter speed,
While minimizing the number of shots and stopping the movement of the rotating body,
It is an object of the present invention to develop a rotating body photographing apparatus capable of obtaining a photograph having extremely good resolution.

(Means for Solving the Problems) In order to solve the above problems, in the rotating body imaging apparatus of the present invention, as shown in the claim correspondence diagram of FIG. In a rotating body photographing apparatus in which a photographing machine 4 is connected to a rear end of the fiber scope 3, the rotating speed of the rotating body 2 is controlled by a pulse signal. A rotating body pulse detector 5 for detection is provided,
An optical fiber 7 for irradiating a flash part of a rotating body with a strobe light from a strobe 6 capable of emitting light at high speed is arranged, and a pulse signal (P) from the rotating body pulse detector 5 is provided.
And a shutter signal (S) from the photographing machine 4 are inputted. When a shutter ON signal and a switching ON signal indicating a desired photographing position among the pulse signals are inputted at the same time, the strobe light is emitted to the strobe 6 at the same time. A switching circuit for outputting a command signal is provided.

(Operation) When the rotating body is rotated and the rotating body is photographed at the rotational direction synchronization position, the switching circuit 8 detects the rotation speed of the rotating body 2 by a pulse signal from the rotating body pulse detector 5 (pulse signal). P) and a shutter signal (S) from the photographing machine 4 are input to the strobe 6 when a shutter ON signal and a switching ON signal indicating a desired photographing position in the pulse signal (P) are simultaneously input. On the other hand, a tuning light emission command signal is output.

In accordance with the tuning light emission command signal, the flash portion of the rotating body 2 is irradiated with the strobe light from the strobe 6 capable of emitting light at high speed through the optical fiber 7, and the photographing machine is exposed only for the emission time of the strobe light 6. Thus, a desired portion of the rotating body can be photographed with the movement stopped.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

 First, the configuration will be described.

As shown in FIG. 2, the rotating body photographing apparatus of the embodiment has a front end 13a of a fiberscope 13 disposed on a rotating 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.

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

The rotating body 12 is provided with a pulse pickup 15 (rotating body pulse detector) for detecting a rotation speed by a pulse signal, and a photographing portion of the rotating body 12 is provided with a flash strobe 16 capable of emitting light at high speed. An optical fiber 17 for irradiating strobe light via a condenser lens 21 and an optical fiber light input unit 22 is provided.

It should be noted that an exposure control signal from the photographing device 14 is input to the photographing strobe 16 so as to emit strobe light corresponding to the exposure.

A switching circuit 18 that receives a pulse signal (P) from the pulse pickup 15 and a shutter signal (S) from the photographing machine 14 and outputs a tuning light emission command signal to the photographing strobe 16 is provided. Is provided as an operation control circuit.

The switching circuit 18 includes a waveform shaping circuit 18a and a 1 / N
Frequency divider 18b, counter circuit 18c, delay circuit 18
d, a semiconductor switch 18e, and the waveform shaping circuit 18
The pulse signal from the pulse pickup 15 is inputted to a, the shutter signal from the photographing machine 14 is inputted to the semiconductor switch 18e, and the photographing strobe 16
, A tuning light emission command signal is output.

 Next, the operation will be described.

When the rotating body 12 in the transmission case 10 is rotated and the rotating body 12 is photographed at the rotational direction synchronization position, the switching circuit 18 detects the detected waveform from the pulse pickup 15 (FIG. 3A) by the waveform shaping circuit 18a. The waveform is shaped into a pulse wave of N pulses for one rotation (FIG. 3 (b)), and the shaped wave is frequency-divided in the form of one rotation pulse in the next 1 / N frequency dividing circuit 18b {FIG. 3 (c)}. , Counter circuit 18
In c, it is counted as shown in {Fig. 3 (d)},
In the delay circuit 18d, the phase is shifted by the determined predetermined amount {FIG. 3 (e)}, and in the semiconductor switch 18e, a switching ON pulse signal is generated based on the determination of the position to be photographed and the rotational position to be photographed. (F)｝.

Then, when the shutter ON signal {FIG. 3 (g)} from the photographing device 14 is input to the semiconductor switch 18e simultaneously with the switching ON pulse signal, the tuning flash command signal {FIG. H)｝ is output.

In response to the tuning light emission command signal, strobe light is emitted from the photographing strobe 16, and the strobe light is irradiated through the condenser lens 21, the optical fiber light input section 22, and the optical fiber 17, and is emitted by the photographing strobe 16. The photographing machine 14 is exposed only during the light emission time, and a desired portion of the rotating body 12 can be photographed in a state where the movement is stopped.

As described above, in the rotating body photographing apparatus according to the embodiment, since the apparatus is based on strobe-synchronized light emission, the number of photographed images is minimized without using the photographing machine 14 with a high shutter speed, and While stopping the movement of 12, you can get a very good resolution photo.

That is, when a normal single-lens reflex camera is used as the photographing machine 14, if the shutter speed is set to 1/60 sec or less and the shutter is completely opened, if the desired position of the rotating body 12 rotates while the shutter is fully opened, a strobe light is used. A desired photographing location can be photographed by tuning light emission.

Further, as shown in FIG. 4, the switching circuit 18 is
In addition to adding a timer circuit 18f, a counter circuit 18c
Are connected to form a feedback circuit, and as its internal circuit, a switching circuit 18 ′ using an AND circuit 18 c ₁ and counts 18 c ₂ and 18 c ₃ , a waveform shaping circuit 18 a
AND circuit with the signal from the switch and the signal from the semiconductor switch 18e
By shifting the count values in the counts 18c ₂ and 18c ₃ by a predetermined number while comparing in 18c ₁ , it is also possible to shift the image on the rotating body 12 by an arbitrary angle in the rotation direction to take a multiple exposure photograph.

Further, in the apparatus shown in FIG. 2, if the photographing strobe 16 is replaced with a synchronous strobe, and instead of the photographing machine 14, a TV camera, a television device and a TV monitor are connected, the movement of the rotating body 12 is controlled. It is also possible to stop and visually observe the state of the rotating body 12.

In addition, if the circuit shown in FIG. 4 and a tuning strobe, a TV camera, and the like are used, an image obtained by shifting each rotation image by an arbitrary amount in the rotation direction can be observed while the rotating body 12 is moved slowly.

As described above, the embodiments have been described based on the drawings. However, the specific configuration is not limited to the embodiments, and even if there is a design change or the like without departing from the gist of the present invention, it is included in the present invention. .

For example, in the embodiment, the example in which the rotating body in the transmission case is photographed has been described. However, the present invention can be applied to any rotating body that is housed in the case and whose rotation status is to be known.

(Effect of the Invention) As described above, in the rotating body photographing apparatus of the present invention, the pulse signal from the rotating body pulse detector and the shutter signal from the photographing machine are input, and the shutter ON signal is output. Since a switching circuit for outputting a tuning light emission command signal to the strobe when a switching ON signal indicating a desired shooting location among pulse signals is simultaneously input is provided, without using a shooting machine with a high shutter speed, The effect is obtained that it is possible to take a picture with extremely good resolution while minimizing the number of shots and stopping the movement of the rotating body.

[Brief description of the drawings]

FIG. 1 is a view corresponding to a claim showing a rotating body photographing apparatus of the present invention, FIG. 2 is an overall view showing a rotating body photographing apparatus of an embodiment, and FIG. 3 shows each signal wave in a switching circuit of the embodiment apparatus. FIG. 4 is a block diagram showing a modified example of the switching circuit. DESCRIPTION OF SYMBOLS 1 ... Case 2 ... Rotating body 3 ... Fiber scope 4 ... Photographer 5 ... Rotating body pulse detector 6 ... Strobe 7 ... Optical fiber 8 ... Switching circuit (P) ... Pulse signal (S) …… Shutter signal

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 15/05

Claims (1)

(57) [Claims] 1. A rotating body photographing apparatus in which a fixed end of a fiberscope is disposed close to a rotating body existing in a case, and a photographing machine is connected to a rear end of the fiberscope. A rotating body pulse detector for detecting the rotating speed of the rotating body by a pulse signal, and an optical fiber for irradiating a flash portion of a rotating body with a strobe light from a strobe capable of emitting light at high speed to the photographing portion of the rotating body; A pulse signal from a detector and a shutter signal from the photographing machine are inputted, and when a shutter ON signal and a switching ON signal indicating a desired photographing position among the pulse signals are inputted at the same time, it is synchronized with the strobe. A rotating body photographing apparatus provided with a switching circuit for outputting a light emission command signal.