JPS63258172A - Image pickup system - Google Patents

Abstract

PURPOSE:To save power and to record a stable video by starting energizing to the following image pickup device prior to the switching from one image pickup device to the following one by a prescribed time. CONSTITUTION:The energizing to a B-camera main body 2 is turned on earlier than a time TA when the energizing to an A-camera ends by a time TG sec. Since the said time of energizing the camera main body 2, synchronizing signals B SYNC from the camera main body 2 are supplied to a synchronization control circuit 6 shown in the figure 1, and thus said signals are phase-synchronized with master synchronizing signals from a master synchronizing circuit 5. When the locking of the control circuit 6 is complete, a signal is outputted to a switch control circuit 7, a switch SWA is turned off to terminate the energizing to the A-camera, and at the same time a switch SWB is turned on to start the energizing to a tripod head 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an imaging method in which a plurality of imaging devices are sequentially switched and monitored while synchronizing their video signals. [Conventional technology 1] Conventionally, this type of imaging system has been configured to sequentially switch a plurality of imaging devices while synchronizing each other.
It is controlled using one monitor and controller. [Problem to be Solved by the Invention 1] However, if a plurality of imaging devices are all energized at all times, there is a drawback that power consumption increases and it is not economical. Therefore, if you energize only the imaging device that you want to display on the monitor, in that case, after the power is turned on, the synchronization of the imaging device will be P, L, L to the master synchronization of the controller.
(f'has, e Locked Loop) until it is locked, synchronization becomes discontinuous, the screen on the monitor becomes distorted, and the disadvantage that external synchronization becomes ineffective has been overcome. Therefore, an object of the present invention is to control a plurality of imaging devices so that they can be monitored sequentially with a single monitor and controller, to energize only the imaging device that you want to monitor on the monitor, and to obtain stable images at all times. The purpose of this invention is to provide an imaging method that can [Means for Solving the Problems] In order to achieve such an objective, in the present invention, power is turned on to an imaging device consisting of a camera body and a pan head in a two-step mode for the camera body and the pan head. do it like this. That is, in the present invention, power is supplied to only one imaging device that is sequentially selected from among a plurality of imaging devices, and when switching from one imaging device to the next, a predetermined voltage is applied from the time of switching. The present invention is characterized in that energization of the next imaging device is started before the time. [Function] According to the present invention, the camera body operates in the first stage, and the synchronization of the camera body is locked to the mask synchronization on the controller side, and then the power to the imaging device is switched in the second stage to stabilize the camera body. Images can be displayed on a monitor. [Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In Figure 1, l is the A camera body, lo is its pan head,
2 is the B camera body, 2゛ is its camera head, 3 is the C camera body, and 3° is its camera head.The camera body and its camera head constitute the imaging devices A camera, B camera, and C camera, respectively. do. 4 is a controller that connects multiple (3 sets) A cameras, B
Performs synchronization of the camera and C camera and switching control of the power supply switch. Reference numeral 5 denotes a mask synchronization circuit (SYNC), which is built into the controller 4, and controls the A camera, B camera, and C camera so that they are all synchronized with this timing. 6 is a synchronous control circuit (PLL), and A
A phase comparison is made between the synchronization signal of each camera body of the camera, B camera, and C camera and the synchronization signal of the mask synchronization circuit 5, and a control signal such as a reset or error voltage is sent to the imaging device or a switch control circuit 7 to be described later. supply to. 7 is a switch control circuit, which includes power-on switches swA and sw for supplying power to camera A, camera B, and camera C;
, and SWc. A monitor 8 displays images from an imaging device. FIG. 2 is a time chart showing an example of the order of energization of the imaging device. In FIG. 2, TA, T, and Tc are each A
This is the period during which the camera, B camera, and C camera are capturing images. Figure 2 (D) is a waveform diagram for energizing the power supply of the camera body 1 of camera A, and Figure 2 (E) is a waveform diagram for energizing the power supply for the pan head 1 of camera A, and the start of energization of camera A. Time points are set in two stages. Similarly for B camera and C camera, see Figure 2 (F).
, (H) and Figures 2 (J) and (2) show the energization waveforms set in two stages to the camera body and the pan head, respectively. Next, referring to FIG. 2, the operation of switching the energization from camera A to camera B will be explained. Figure 2 (D) shows the energization waveform of the A camera body 1, which drops to zero at the start of image capture by the B camera, but the energization to the B camera body 2 is as shown in Figure 2 (F). , the power is turned on TG (seconds) before the end of TA when power supply to camera A ends. In other words, the two cameras A and B are energized for a predetermined period T6 (seconds). When the B camera is powered on, the A camera 1 is also energized, but as a first step, immediately after the B camera is powered on, only the camera body 2 is energized and the cloud is turned on. No electricity is applied to the base 2°. This is because the pan head 2' is a swinging device that performs horizontal and vertical burn and tilt operations on the camera body 2, and because it is composed of motors, it consumes a large amount of power. Ra (
seconds) before the camera body 2 was energized, the first
A synchronization signal B from the camera body 2 is sent to the illustrated synchronization control circuit 6.
5YNC is sent to the synchronization control circuit 6 and phase synchronized with the mask synchronization signal from the master synchronization circuit 5. Synchronous control circuit (PLL) [When the lock of i is completed, a signal is output to the switch control circuit 7, which turns off the switch SWA, and at the same time the power supply to camera A ends, the switch SWB turns on and the cloud Power starts at 2°. Of course, here, if the synchronization signal of the camera body 2 is not locked to the mask synchronization signal, phase synchronization has not been completed, so the switch control signal is not output to the switch control circuit 7, and the switch control signal is not output from the A camera to the B camera. No energization is performed. Furthermore, if the synchronization signal of the camera body 2 is locked to mask synchronization, there is no problem in a sequence in which the power supply is immediately switched from camera A to camera B. The power switching from the B camera to the C camera is also performed in the same sequence as the power switching from the A camera to the B camera described above. FIG. 3 is a block diagram showing the configuration of another embodiment of the present invention. In FIG. 3, the same parts as in FIG. 1 are given the same reference numerals and their explanations will be omitted. 31, 32 and 33 are phase locked loops (PLL), which are connected to the A camera body 1. It is built into each of the B camera body 2 and the C camera body 3, and locks the phase of the synchronization signal of each camera to the input synchronization signal. Regarding the embodiment shown in FIG. 3, first, it is assumed that an image is being captured by camera A. The phase of the synchronization signal of the A camera is locked to the synchronization signal from the mask synchronization circuit 5 via the synchronization control circuit 6. Next, when switching from camera A to camera B,
When the camera body 2 starts to be energized, the synchronization signal of the B camera is transmitted to the A synchronization signal via the PLL 32 built into the B camera body 2.
The phase is locked to the synchronization signal from the camera. Thereafter, the power to the A camera is cut off, and at the same time, the B camera is turned on and switched. In this way, it is possible to switch from the A camera currently taking an image to the next B camera without disturbing the image on the monitor. By repeating the above operations, images from all cameras can be sequentially switched and monitored. Also, even if you want to switch to any camera at any time without necessarily determining the order of switching, such as A camera → B camera → C camera, etc., first turn on the power to the desired camera body to synchronize it in advance. After going there, you can switch to the desired camera and monitor it. [Effects of the Invention] As is clear from the above, according to the present invention, a plurality of imaging devices are controlled by one monitor and a controller, and an imaging device captures an image displayed on a monitor. By energizing only
It is possible to display continuous images without synchronization holes on a single monitor, and furthermore, it is possible to record stable images continuously on a VTR or the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a time chart showing an example of the order of energization of the imaging device, and FIG. 3 is a block diagram showing the configuration of another embodiment of the present invention. be. 1.2.3... Camera body, 1°, 2°, 3°... Pan head, 4... Controller, 5... Mask synchronization circuit, 6... Synchronization control circuit, 7...・Switch control circuit.

Claims (1)

[Claims] 1) Only one imaging device selected sequentially from among a plurality of imaging devices is energized, and when switching from one imaging device to the next imaging device, at the time of switching. An imaging method characterized in that energization of the next imaging device is started a predetermined time earlier. 2) The predetermined period of time is a period of time necessary and sufficient to synchronize the synchronization signal of the next imaging device with the reference synchronization signal. Imaging method. 3) Claims characterized in that the predetermined time is a time necessary and sufficient to synchronize the synchronization signal of the next imaging device with the synchronization signal of the first imaging device. The imaging method described in Section 1.