JPH03263978A - Image pickup device - Google Patents

Abstract

PURPOSE:To attain stable and safe underwater image pickup by displaying a prescribed warning onto a finder when any of oxygen bomb residual quantity, residual quantity of a recording medium and residual quantity of a battery reaches a prescribed value or below. CONSTITUTION:A residual pressure signal S1 from a pressure sensor 12, a data residual quantity signal from a recorder 18 and a battery residual quantity signal S3 are compared respectively with reference values TH1, TH2, TH3 by comparator circuits 40, 42, 44. The result of comparison is fed to an AIR mark generating circuit 46, a TAPE mark generating circuit 48, and a BATT mark generating circuit 50 respectively. When the bomb residual pressure, the tape residual quantity or the battery residual quantity reaches respectively a prescribed value TH1, TH2 or TH3 or below, a video signal of a relevant mark is generated and when any of the bomb residual pressure, the tape residual quantity and the battery residual quantity reaches the reference value TH1, TH2 and TH3 or below respectively, an END mark generating circuit 54 generates a video signal of an END mark. Outputs of the mark generating circuits 46, 48, 50, 54 are synthesized by an adder circuit 56 and the mum is fed to a synthesis circuit 22.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an imaging device for underwater photography.

[Prior Art] In recent years, the number of scuba divers has increased rapidly, and as a result, the number of people taking underwater photographs has also increased.

In conventional underwater photography devices, only the camera and its accessory parts (for example, video lights, etc.) are waterproofed. That is, a camera-type VTR for general use is housed in a waterproof case and used. The waterproof case consists of a housing that can be divided into two parts to allow the camera-integrated VTR to be put in and taken out, and the divided parts can be joined together with a watertight structure such as an O-ring.

[Problem to be solved by the invention] When scuba diving, it is a golden rule to constantly check the remaining amount of oxygen in the oxygen tank, but when taking underwater photographs,
I tend to get so absorbed in shooting that I forget to check the amount remaining in my oxygen tank. This is extremely dangerous.

In addition, underwater, we can replace the magnetic tape that is the recording medium,
Since the battery cannot be replaced, it is necessary to ascend to the surface.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an imaging device that allows underwater photography to be carried out safely and with peace of mind.

[Means for Solving the Problems] The imaging device according to the present invention issues a predetermined warning when any one of the remaining amount of the oxygen cylinder, the remaining amount of the recording medium, and the remaining amount of the battery becomes a predetermined value or less. The feature is that it is displayed in the finder.

[Function] With the above means, it is possible to know when to replace the oxygen cylinder, recording medium, and battery without taking your eyes off the finder. Therefore, even if the user is absorbed in taking pictures, it is possible to prevent the user from forgetting to check the residual pressure in the oxygen cylinder, and also to prevent the user from missing a chance to take pictures. This allows underwater photography to be carried out safely and with peace of mind.

[Example code] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. 1
0 is an oxygen cylinder, and 12 is a pressure sensor normally equipped to measure the residual pressure of the oxygen cylinder 10. 14 is the remaining amount output S1 of the pressure sensor 12, and a recording device W to be described later.
This is a warning signal generation circuit that generates a warning video signal indicating the residual pressure, the remaining magnetic tape amount, and the remaining battery amount in accordance with the remaining magnetic tape amount signal S2 and the remaining battery amount signal S3 from 18. 16 is an imaging circuit that generates a video signal of a photographed object; 18 is a recording device (so-called VTR) that records the video signal output from the imaging circuit 16; 2o is a warning signal generating circuit 1 which applies the video signal output from the imaging circuit 16.
a synthesis circuit for synthesizing the warning video signals output from 2;
2 is a monitor device as a finder, and a synthesis circuit 2
Displays the video of the video signal output from 0. The warning signal generating circuit 14, the imaging circuit 16, the recording device 18, the combining circuit 20, and the monitoring device 22 are housed in a waterproof housing.

FIG. 2 shows an example of the display on the monitor device 22. As shown in FIG. 30 is a display screen, which displays an rENDJEND mark 32 at the top of the display screen 30 when any of the residual pressure of the oxygen cylinder 10, the remaining amount of the magnetic tape, and the remaining amount of the battery becomes a predetermined amount or less;
The contents are displayed at the bottom of the display screen 30, that is, oxygen cylinder 1
If the residual pressure is 0, the rAIRJ mark 34 is displayed or blinks, and if the remaining amount of magnetic tape is the rTAPEJ mark 3.
6 is displayed or blinks, and if the battery level is low, rBA is displayed.
Display or blink the TTJ mark 38. Of course, if more than one item is applicable, all the items are displayed or blinked.

FIG. 3 shows an example of the circuit configuration of the warning signal generation circuit 14.

Residual pressure signal S1 from pressure sensor 12 and recording device 1
Tape remaining amount signal S2 and battery remaining amount signal S3 from 8
are set to the reference value THI by comparison circuits 40 and 42° 44, respectively.
Compare with TH2 and TH3. The comparison results are A
IR mark generation circuit 46, TAPE mark generation circuit 4
8 and BATT mark generation circuit 50. AI
The R mark generation circuit 46, the TAPE mark generation circuit 48, and the BATT mark generation circuit 50 are circuits that generate video signals for each mark 34.3638 shown in FIG. 2, respectively.

The outputs of the comparison circuits 40, 42.44 are also applied to the OR circuit 52, and the outputs of the OR circuit 52 (comparison circuits 40, 42.
The logical sum of the comparison results of 44) is the END mark generation circuit 5.
4. The END mark generation circuit 54 is a circuit that generates a video signal corresponding to the END mark 32 shown in FIG.

Therefore, each mark generation circuit 46, 48, 50 generates a video signal of the corresponding mark when the cylinder residual pressure, tape residual amount, or battery residual amount becomes less than the predetermined value THI, TH2, TH3, respectively. The mark generation circuit 54 outputs an END signal when any one of the remaining cylinder pressure, remaining tape amount, and remaining battery amount becomes less than the reference value THI, TH2, or TH3.
Generates a mark video signal. Each mark generation circuit 46,
The outputs of 48, 50, and 54 are combined by an adder circuit 56 and supplied to a combiner circuit 22.

In the above embodiment, each remaining amount is displayed within the display frame of the finder screen, but it may of course be displayed outside the display frame. In that case, the output of the warning signal generation circuit 14 will be applied directly to the monitor device 22. In any case, the object of the present invention can be achieved if the photographer can simultaneously view the remaining amount display while looking through the finder.

[Effects of the Invention] As can be easily understood from the above explanation, according to the present invention, the residual pressure of the oxygen cylinder can be checked at all times in the viewfinder, so even when one is engrossed in photography, one does not forget to check the remaining pressure. This dangerous situation can be avoided.

Furthermore, since it is possible to know the remaining capacity of the recording medium and the timing for replacing the battery, it is possible to prevent missing photographing opportunities.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of one embodiment of the present invention, FIG. 2 is a display example of this embodiment, and FIG. 3 is an IT warning signal generation circuit 14.
This is an example of a circuit configuration.

Claims (1)

[Claims] An imaging device characterized in that a predetermined warning is displayed in a viewfinder when any one of the remaining amount of an oxygen cylinder, the remaining amount of a recording medium, and the remaining amount of a battery becomes a predetermined value or less.