KR200282482Y1 - Receiving carrier level display module for optical receive of optical video transmission system - Google Patents

Abstract

The present invention relates to a carrier reception level display device of a receiver in an optical image transmission device that allows an operator to easily check whether an optical link is operable by displaying a current reception level.

A video camera that captures a subject to be monitored, a monitor that receives an image captured by the video camera and outputs it to a screen, a transmitter connected to the video camera to process and transmit the captured image, and is connected to the transmitter and an optical cable. And a closed circuit television system including a receiver for processing an image transmitted from a transmitter and outputting the image from the monitor, the FM carrier measuring unit measuring an intensity of an FM carrier received from the receiver, and the FM Including a microprocessor for determining the state of the system according to the results measured by the carrier measuring unit and outputs the operation control signal of the system according to the result, and a status display unit for displaying the state of the system according to the control signal output from the microprocessor It is characterized in that the configuration. In this case, the status display unit includes a reception level indicator lamp whose blinking speed is changed in proportion to the strength of the FM carrier measured by the FM carrier measurement unit.

Description

Carrier reception level display device of receiver in optical image transmission device {RECEIVING CARRIER LEVEL DISPLAY MODULE FOR OPTICAL RECEIVE OF OPTICAL VIDEO TRANSMISSION SYSTEM}

The present invention relates to a carrier reception level display device of a receiver in an optical image transmission device, and more particularly, it is possible to immediately determine whether the optical link is an operable reception level when installing, thereby improving convenience of installation. The present invention relates to a carrier reception level display device of a receiver in an optical image transmission device.

In general, Closed Circuit Tele-Vision (hereinafter referred to as CCTV) system is widely used for surveillance in banks and factories, and is used to identify traffic conditions at major intersections. In particular, efficient management and monitoring are needed to reduce manpower and operation costs in industrialized and automated industrial sites. The CCTV system has been widely used due to the convenience and accuracy of the image to satisfy the visual management, surveillance of the supervisor.

Such a CCTV system, as shown in Figure 1, one or more video cameras 10 to shoot the monitoring object, the image taken from the video camera 10 to the coaxial cable 11 and the repeater 12 It is composed of a monitor 13 which is received through the output to the screen, and the VCR 14 for recording so that the image captured by the video camera 10 can be reproduced later.

Between the video camera 10 and the system for processing the captured image and display on the monitor 13 is connected to each other using a coaxial cable 11, that is, a wire, when using the wired method in this way If the physical distance between the controllers changes, for example, control of moving vehicles such as trains, cars, and cranes, repositioning of large structures, and other remote control is needed to understand the river, river and road conditions. It has the disadvantage of having to be refitted.

In other words, it is possible to use the wires in accordance with the change distance where the physical distance changes, but it is very inconvenient because the wiring or the camera and the system must be moved frequently each time.

In particular, when the distance between the video camera 10 and the monitor 13 is 1km or more, as shown in FIG. 2, the transmitter 15 is connected to the video camera 10 to process the captured image. The receiver 13 is connected to the monitor 13 to process an image transmitted from the transmitter 15 and output the same from the monitor 13. In this case, the transmitter 15 and the receiver 16 are connected through the optical cable 17 to increase the transmission efficiency.

Although the reception level was measured by using a power meter during the installation work connected as described above, it was difficult to check whether the received light amount was sufficient or the receiver was normal, so that the installation work was complicated.

The present invention has been made to solve the above problems, and its purpose is to display the current reception level so that the operator can easily check whether the optical link is operable, and the carrier reception level of the receiver in the optical image transmission device. It is to provide a display device.

According to an aspect of the present invention for achieving the above object, a video camera for photographing the monitoring target, a monitor for receiving the image taken from the video camera to output the screen, and the image is connected to the video camera Is applied to an optical image transmission apparatus including a transmitter for processing and transmitting a signal, and a receiver connected to the transmitter and an optical cable to process an image transmitted from the transmitter and output the signal from the monitor, wherein the level of the signal received at the receiver is applied. A reception level display apparatus for displaying a; FM carrier measurement unit for measuring the strength of the FM carrier (carrier) received from the receiver, and a microprocessor for determining the state of the system according to the results measured by the FM carrier measurement unit and outputs the operation control signal of the system accordingly And a status display unit for displaying the status of the system according to the control signal output from the microprocessor.

According to an additional feature of the present invention, the status display unit is a power supply indicator lamp that is lit when power is normally supplied to the system, a video reception indicator lamp that is lit when a video signal is received at the receiver, and FM carrier measurement It is preferable to include a reception level indicator lamp which is lit in accordance with the result measured in the negative. In this case, the reception level indicator lamp is flashing, but the flashing speed may be changed in proportion to the strength of the FM carrier measured by the FM carrier measuring unit.

1 is a view showing the configuration of a general closed circuit television (CCTV) system

2 is a view showing a connection state when the distance between the camera and the monitor is a long distance in general

3 is a block diagram schematically showing the configuration of a carrier reception level display device of a receiver in an optical image transmission device according to the present invention;

<Explanation of symbols for the main parts of the drawings>

13: monitor 16: receiver

17: optical cable 20: FM carrier measuring instrument

30: microprocessor 40: status display

41: power supply indicator lamp 42: video reception indicator lamp

43: reception level indicator lamp

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram schematically illustrating a configuration of a carrier reception level display device of a receiver in the optical image transmission device according to the present invention.

First, the optical image transmission device to which the present invention is applied includes a camera 10, a monitor 13, a transmitter 15, and a receiver 16 as described in FIG. 2, and the transmitter 15 and the receiver. 16 is connected by an optical cable 17.

Referring to FIG. 3, reference numeral 20 denotes an FM carrier measuring unit for measuring the strength of an FM carrier received by the receiver 16, and 30 denotes an FM carrier measuring unit 20. A microprocessor determines a state of the system according to the result and outputs an operation control signal of the system according to the result, and 40 denotes a state display unit displaying the state of the system according to the control signal output from the microprocessor 30.

The status display unit 40 has a power supply display lamp 41 which is turned on when power is normally supplied to the system, and a video reception indicator which is turned on when a video signal is received from the transmitter 15 at the receiver 16. It comprises a lamp 42 and a reception level indicator lamp 43 which is turned on in accordance with the result measured by the FM carrier measuring unit 20.

At this time, the reception level display lamp 43 is flashing, but the flashing speed is proportional to the strength of the FM carrier measured by the FM carrier measuring unit 20 so that the operator can easily check the current reception level. do.

Referring to the operation of the present invention having the configuration as described above are as follows.

When the image photographed by the camera 10 is transmitted to the receiver through the transmitter 15 and the optical cable 17, the receiver 16 processes the image to be displayed on the monitor 13. The above operation is also carried out in the process of installing the system to determine whether the closed circuit television system is properly installed while the operator watches the monitor 13.

In this case, the present invention measures the strength of the FM carrier (carrier) received by the receiver 16 through the FM carrier measuring unit 20, and outputs the measurement result to the microprocessor 30. The microprocessor 30 determines the state of the system according to the strength of the FM carrier measured by the FM carrier measuring unit 20 and accordingly outputs an operation control signal of the system. At this time, the microprocessor 30 determines whether power is normally supplied to the system, and determines whether the video signal is received from the transmitter 15 in the receiver 16.

According to the above operation, a display is made on the status display unit 40 according to the result determined by the microprocessor 30. When the power is normally supplied to the system, the power supply display lamp 41 is turned on. When the video signal is being received from the transmitter 15 at the receiver 16, the video reception display lamp 42 is turned on.

In addition, the reception level display lamp 43 operates by blinking in proportion to the strength of the FM carrier measured by the FM carrier measuring unit 20, so that the operator can easily check the current reception level.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention defined in the appended claims.

As described above, when the carrier reception level display device of the receiver is applied to the optical image transmitting apparatus according to the present invention, the reception level display lamp blinks according to the current reception level, so that an operator can easily check whether the optical link is operable. It can help you work.

Claims (3)

A video camera that captures a subject to be monitored, a monitor that receives an image captured by the video camera and outputs it to a screen, a transmitter connected to the video camera to process and transmit the captured image, and is connected to the transmitter and an optical cable. A reception level display device for applying an optical image transmission device including a receiver for processing an image transmitted from a transmitter and outputting the image from the monitor, the reception level display device for displaying a level of a signal received by the receiver, FM carrier measurement unit for measuring the strength of the FM carrier (carrier) received from the receiver, and a microprocessor for determining the state of the system according to the results measured by the FM carrier measurement unit and outputs the operation control signal of the system accordingly And a state display unit for displaying a state of a system according to a control signal output from the microprocessor. The method of claim 1, The status display unit is turned on according to the power supply display lamp that is turned on when power is normally supplied to the system, the video reception indicator lamp that is turned on when a receiver receives a video signal, and the result measured by the FM carrier measurement unit. Carrier reception level display device of the receiver in the optical image transmission device comprising a reception level display lamp. The method of claim 2, The reception level indicator lamp flickers, but the flickering speed is proportional to the strength of the FM carrier measured by the FM carrier measurement unit.