JPS61164379A - Camera system - Google Patents

Abstract

PURPOSE:To decrease heat dissipation by coupling a head part of a camera and a control section (RCU) by two lines and converting plural different power voltages to pulses to send the result to the head thereby saving the number of power supply lines and minimizing the power loss. CONSTITUTION:A power supply sending side 11 corresponds to the RCU side and a reception side 12 corresponds to a camera head side. When voltages A(V), B(V) (A(V)>B(V)) are inputted to the transmission side 11, the A(V) is switched by a pulse width taking a load into consideration by a switch circuit 13 and outputted as a pulse wave, the B(V) is a waveform at input, and a waveform A as a result of combination of the two waveforms is sent to the reception side 12. Outputs B, C are obtained at the input side of regulators 16, 17 of extracting circuits 14, 15 in the reception side 12, and A-alphaV adn B-betaV are extracted respectively as outputs of the extracting circuits 14, 15 (alpha and betaare losses of the circuits 14, 15). Thus, the two power supplies are sent through two lines including a ground line.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a camera system comprising a head section and a control section.

Conventional technology FIG. 3 shows a conventional camera system.

This configuration will be explained with reference to FIG. In FIG. 3, reference numeral 1 denotes a head portion of a compact separation camera, and this head portion 1 is supplied with power from a control unit 3 (hereinafter referred to as RCU). 2 is the head part l from RCU3
This is the power line used to supply power to the This line 2 is the power supply power A(V), B(V)(A(V)>
When there are two power supplies such as B(V)), it is usually A(
There are three lines: V), B(V), and ground line, but to save wires, there are two power lines, and the B(V) line is connected to the head part 1.
is created from A(V).

Problems to be Solved by the Invention However, a proportional loss occurs in the shaded area in FIG.
In this case, when the head is busy, heat due to this loss may become a problem.

The present invention eliminates the drawbacks of the conventional example described above, and aims to reduce the number of lines used for power supply, minimize power loss, and reduce heat generation.

Means for Solving the Problems In order to achieve the above object, the present invention provides a head section and an RCU.
The two lines are connected to each other by two lines, while a plurality of different power supply voltages are pulsed and sent to the head side.

Function: Normally, when sending two power supplies of A and B (V), three lines including the ground line are required, but this can be sent using two lines including the ground line. , and grinning that it was pulsed, B(V)(A
(V)>B(V)) c7) Leki, rail o loss, A
This can be reduced compared to the case where B(V) is directly regulated from (V).

Embodiment The configuration of an embodiment of the present invention will be explained with reference to the drawings.

In FIG. 1, reference numeral 11 indicates a power supply side, and the power supply side 11 is connected to a side 12 through a cable. Reference numeral 13 denotes a switch circuit that turns on and off the applied A (V) input, which is controlled by a switching pulse.

14.15 includes voltage regulator 16.17'i A (
v), B(V) is an output circuit. In addition, the sending side 1
1 corresponds to the R, CU side, and the receiver side 12 corresponds to the camera head side.

Next, the operation of the above embodiment will be explained. Figure 1: Nioite, send! INIII x Ni A (V), B (V) (A
When a voltage of (V)>B leap) is input, A(V) is switched by the switch circuit 13 with a pulse width that takes the load into consideration, and is output as a pulse wave. B(V) is the input waveform, and the sum of these two waveforms is the second waveform.
This waveform is shown in Figure (a), and this waveform is sent from the sending side 11 to the receiving side 12.

Here, the receiver is at the input end of the regulator 16.17 of the take-out circuit 14.15 on the side 12 (FIG. 2(b)).

An output like (c) is obtained, and the extraction circuit 14.15
As the outputs, A-αV and B-β■ can be obtained, respectively (α, β...loss of circuit 14.15).

Effects of the Invention The present invention has the above-described configuration, and provides the following effects. Since the two power supplies are sent in one waveform, the two power supplies can be sent over two lines including the ground line. Since the higher voltage is pulsed depending on the load, power loss is reduced. Therefore, by setting the feeding side to the control section side of the camera head,
This is advantageous because the number of cables between the two is small.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a camera system according to an embodiment of the present invention, FIG. 2 is a waveform diagram of each part thereof, FIG. 3 is a block diagram showing a conventional system, and FIG. 4 is a waveform diagram thereof. 11...Sending side, 12...Receiving side, 13...Switch circuit, 14.15...Takeout circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure OY□ Figure 4v

Claims (1)

[Claims] A camera system in which a control side for controlling a camera is provided with means for switching a high voltage side of different voltages and superimposed on a low voltage side, and a means is provided on the camera side for separating and extracting the output of the means.