The Combine Solution of Elevator Alarm Intercom and Video Monitoring

Xiamen Caimore Communication Technology Co.,Ltd2 F, 37#, Wanghai Road, Software Park 2, Xiamen,China (361009)

Contact person: Cynthia Wang E-mail: [email protected]: caimoremodem Mobile phone: +86-13720875034

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Tel:+86 592 5901215 Web: www.caimore.com/emain.asp1

The combine solution of elevator alarm intercom and video monitoring

Statement

Copyright:

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Preface

China's existing elevator over 30 million units, the demand for about 50,000 per year.

Elevator to 24 hours of uninterrupted operation, safe operation of the lift is that

people are most concerned.

Affect the safe operation of the elevator there are two factors, one is the quality and

reliability of the elevator system itself; the second is caused by human factors inside

the elevator car safety.

For a long time the elevator intercom system mainly uses the bus intercom system,

the safe operation of elevators mandatory one, but with the popularity of video

surveillance systems, the newly installed elevator Start to install video surveillance,

improve the safety of operation of the elevator.

In the elevator installation of video surveillance video often have to face the

problem of interference, because the elevator motor is running along with strong

electromagnetic radiation signals that may cause interference video surveillance

images. To solve the problem of video interference, through plant will use video

interference.

Elevator video intercom alarm systems linked in this article, to give contractors and

users in the practical application of the new and old systems. It is only through a

single video cable can achieve transmission of video surveillance images, the alarm

signal transmission, audio and video intercom signals, with video interference. This

reliable non-line transmission structure, reliable alarm mode, high-quality audio

broadcast intercom mode, the alarm automatically switch video images when the

alarm lift linkage, greatly improving the safe operation of elevators, reduces cable

material, shortening construction time and reduce the system cost.

The system of elevator alarm intercom and video monitoring

Elevator video intercom alarm linkage system is already applied for a patent new technology




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does not require laying of cables, use the elevator video monitoring cable not only transmit

video monitor signal can also transmit alarm signals, audio intercom, through SCM control

technology and computer management software video intercom realize alarm linkage control,

networked control 128 elevators.

The system Working principle

Video linkage control system core equipment is controlled by a single audio and video modulator

(referred to as: modulators), 8-way audio and video linkage controller (hereinafter: controller),

video linkage switch (abbreviated) switch management computer components. In coupled

pickups, loudspeakers, radio amplifier can form joint elevator video intercom alarm monitoring

system.

Audio and video transmission. CATV audio and video signal transmission technology, the

camera's video signal modulation 0 ~ 6MHz to the 49.75MHz frequency band above, the use of

coaxial cable 0 ~ 1GHz bandwidth to transmit audio and video signals. This transmission and

video interference, as Personal Emergency of cable, high-frequency signal sent by the controller

modulator demodulator module demodulates the audio and video signals.

Alarm signal transmission. Has applied for patents for inventions with a new technology that

uses low-frequency coaxial cable, elevator alarm button, directly using a common normally open

alarm mode, the alarm signal directly transmitted to the terminal controller with a video cable,

by the controller the alarm data transmitted to the management computer.

Radio signal transmission. Passive loudspeakers placed in the elevator, is connected to the

modulator. Give instructions to the controller by the management computer, video cable

broadcast signal transmitted to the elevator in the loudspeakers.

System control. The system uses RS232 and RS485 control from the computer and the controller,

switch two-way data communication, realization of the system function is performed by the

controller of the microcontroller and manage computer-controlled. Systems may be connected

to 16 8-way audio and video linkage controller to achieve 128 monitoring points of video, alarm,

audio intercom, control linkage.

The functions be achieved by system




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① When pressed the alarm button in the elevator, the elevator control room monitor to

automatically switch the display of video images and elevator alarm sound monitor elevator, the

controller alarm tone.

② broadcast signal switching can be achieved with the elevator intercom personnel.

Meanwhile more than③2 lifts alarm, the computer can not display more than 2 alarm prompt,

alarm and automatically switch to the latest elevator screens, intercom.

④ monitor elevator intercom and alarm detection. Usually through computer management

software to switch the display of video images each elevator, and can return the sound through

the intercom, inspection and monitoring images and intercom functions.

⑤ tripartite intercom or five-party talk. Five-party intercom cable can be connected to a video

cable, elevator maintenance when necessary to maintain multi-intercom, intercom equipment

can be simple or small PBX access to multi-party intercom.

⑥ for high-grade elevators, elevators need to run data terminal equipment to the control room,

and remote control of the elevator, the elevator run more reliable, more convenient and efficient

to solve the elevator malfunction. In the elevator controller will increase the data transfer

operation of the elevator controller may be to the terminal device and remote control.

Each elevator car inside the main equipment: audio and video control modulator (referred to as:

modulators), alarm button, microphone, loudspeaker, camera.

a. audio pickup installed in the elevator car control panel, the audio output is connected to the

modulator. You can adjust the volume by volume control on the pickup. Pickup can choose

built-in microphone or an external microphone.

b. elevator alarm button connected to an alarm on the modulator / broadcast control port, alarm

signal transmission cable directly transmitted to the terminal device.

c. passive loudspeakers connected to the alarm on the modulator / broadcast control port, an

alarm signal is received after the completion of the terminal device to give a broadcast signal,

the audio two-way intercom. If the loudspeakers appear disconnected, it will automatically send

an alarm signal.

d. Connect your camcorder to the video input port on the modulator.




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e. transmission cable is connected to the RF output port of the modulator.

f. modulator power and camcorders, DC12V.

Terminal Equipment Installation

8-way audio and video alarm linkage controller (hereinafter: controller)

May be in signal communication with 8 inside the elevator car modulator.

8-way audio and video alarm linkage controller

①8 root elevator car video transmission cable to the 8-channel video input port.

②8 video outputs and 8-channel audio output is connected to the DVR.

③ more than one network, audio and video output is connected to the audio and video control

signal switch.

④8 alarm test port for test alarm.

⑤RS485 and RS232 communication ports that use more than one available RS232

communication via RS485 communication, a single.

⑥ When a single use, COM radio amplifier audio output connection. When connected to the

network using audio and video control signal switch.

Function: usually receives 8-way audio and video signals and outputs to the DVR. When the

alarm signal occurs, the alarm indicator light, audio and video output switch to the alarm lift

audio and video images, broadcast audio signal automatic access to the elevator horn

transmission cable, transmission to the control terminal connected to a front modulator for

video , alarm, intercom.

① When more than one controller is networked, you need to use the elevator alarm switch is

switched out audio and video images and broadcast signals, telephone signals to switch to each

controller.

② each controller is connected to the audio and video output switcher, audio and video output

to TV wall monitors.

③JK1 port connected to a broadcast audio amplifier output. JK2 port received a telephone signal

for elevator maintenance. COM port is connected to each controller's COM port to each




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controller output switching signal.

④ RS485 or RS232 connected to the computer through computer software control system.

Transmission distance

Audio and video control modulator can choose from CH1, CH2, CH3, CH4, CH5 selected, the

output level of 115dB. Audio and video demodulation module receiving sensitivity controller to

55dB. Input and output level difference of 60dB.

GB standard SYWV75 and every one hundred meters SYV75 cable attenuation table

According to the above table, the selection of CH5 channel modulator using SYV75-5 cable

transmission, per meter loss 8.1dB, in theory, can transfer 740 meters, taking into account the

practical application of the loss of 80%, the least can transmit 590 meters. Selection of TV cable

SYWV75-5, per meter loss 4.6dB, in theory, can transmit 1300 meters, taking into account the

loss by 80% of the practical application of computing, it can transmit 1000 meters.

Computer Management Software

Elevator alarm intercom video linkage system can be used alone or with a perimeter alarm cell,

burglar alarm, access control, video wall management system consisting of an integrated video

linkage.

System can achieve 128 surveillance video linkage points, in addition to the elevator alarm

intercom, can also achieve perimeter alarm, burglar alarm, access control video linkage, with a

unified management software to manage.

In the video alarm linkage control system, each elevator controller can control eight elevators.

System can connect up to 16 controllers. When the elevator staff pressed the alarm button,

audio and video monitor will automatically switch to the elevator alarm images, sounds

overheard the elevator, select the "Relay 1" on broadcast signal, intercom. Radio amplifier audio

input connections on your computer audio output port connected to the computer with a

microphone for dialogue.

In addition to implementation of elevator video intercom alarm, but also can realize the video




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perimeter alarm linkage, video access control linkage. JK1 signal from the "Relay 1" control, JK2

signal from the "Relay 2" control, JK3 signal from the "Relay 3" control. JK1 ~ JK4 can take 0 ~

120V broadcast signals, telephone signals, RS485 signal, 0 ~ 12V power supply to achieve

different needs.

Integrated monitoring system management platform, including video alarm linkage control

system and video wall control system. Integrated video linkage control system basically meet the

main needs of security, the various subsystems may standalone application or can be integrated

in one. It is compatible with existing alarm detectors, access control equipment, hard disk

recorders and other equipment, to enhance the effectiveness of security and reduce the cost of

the system, it is suitable for the transformation of the new system and the old system.

System installation and construction of the applicable conditions and precautions

Video linkage system uses coaxial cable transmission of video surveillance system based on the

old system suitable for renovation and new systems. According to the system in practical

engineering for the new system and the transformation of the system note the following.

New Systems

New system transmission cable to be used SYWV75 cable TV, good cheap transmission. Its other

main feature is the cable joint use of F connectors, no field welding, easy on-site construction.

Since the transmission characteristics of high frequency and low frequency signals are not the

same as the requirements for construction operations, handling the cable connector, do not

have too many connectors. If the construction of the processing of non-standard connector cable

operation, connectors too, tend to be the main reason causing image quality problems.

Original old system renovation project

The monitoring system has been built usually adopts SYV75 video cable, the transformation into




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a video linkage system does not require re-laying cable, but the need for laying cables to the

original carefully tested to ensure the successful completion of the renovation project.

Appeared in Beijing to undertake the transformation of the old system in liberal arts Xiyuan

problem is the cable connector. Found irregularities in the construction of the cable connector

too, some connector soaked in water, these problems caused by video images to be ineffective,

the RF signal greater impact.

Conclusion

What is the real security needs and to achieve the purpose of one "prevention", advanced and

reliable security facilities can effectively prevent the occurrence of accidents;? Second, in the

event of an accident can make timely and accurate judgments and take effective measures to

correct, prevent significant losses; third can quickly and accurately find relevant video and audio

video data after accidents, to provide accurate and effective information to the authorities.

Integrated video linkage system is based on the original monitoring technology, the video, audio,

alarm, control, independent system TV wall management integrated in one, full use of the

resources of the existing stand-alone systems, to enhance the effectiveness of security

precautions.

In the video surveillance systems and alarm intercom system into one elevator undoubtedly

enhance security, but in the future elevator security systems also need to be able to lift

operating data transmission, remote control. With the elevator safety requirements are high, set

video surveillance, alarm intercom, operating data transmission and remote control of the

elevator security system will meet the increasing needs of users.


Documents

The Combine Solution of Elevator Alarm Intercom and Video Monitoring