关于电梯的外文翻译

双控电梯

PLC

控制

外文翻译

Abstract

Microelectronic

technology's

development,

elevator's

dragging

way

and

the

control

method

has

had

the

very

big

change,

the

exchange

velocity

modulation

is

the

current

elevator

dragging

main

development

direction.

At

present

the

lift

control

system

mainly

has

three

control

modes:

Following

electric

circuit

control

system

(“early

installment

elevator

many

black

-white

control system), PLC control system, microcomputer control system. Because

the

black-white

control

system

the

failure

rate

is

high,

the

reliability

is

bad,

control

mode

not

nimble

as

well

as

consumed

power

big

and

so

on

shortcomings,

at

present

has

been

eliminated

gradually.

Although

the

microcomputer control system has the strong function in the intelligent control

aspect, but also has the interference rejection to be bad, the system design is

complex,

generally

the

servicemen

master flaws

with

difficulty

and

so

on

its

service technology. But PLC control system, because moves the reliability to

be

high,

the

use

service

is

convenient,

anti-jamming,

the

design

and

the

debugging cycle is short and so on merits, time is taken seriously the people

and

so

on

merits,

have

become

present

use

most

control

modes

in

the

lift

control system, at present also widely use in the tradition black- white control

system's technological transformations.

The origin and development of the elevator

Elevator

in

the

Chinese

dictionary

explanation:

building

electricity

powered lift, instead of walking up and down the stairs.

When

it

comes

to

lift

from

the

origin

of

the

2600

BC

Egyptians

built

in

Pyramid using the original lifting system to start, but this kind of crane energy

are human. By 1203, two French monastery installed a crane, the difference

is

just

the

machine

is

the

use

of

donkey

as

power,

load

by

around

a

large

drum

rope

for

hoisting.

This

method

has

been

used

to

modern

until

Watt

invented the steam engine, in about1800, mine owners can use the crane to

mine in coal transportation.

For hundreds of years, people made various types of elevators, they all

have

a

common

defect:

as

long

as

the

lifting

rope

snaps,

lifting

ladder

he

rapidly hit bottom layer. 1854 Otis design a brake: in the lift platform mounted

on top of a truck with a spring and a brake lever and Lift Wells Road on both

sides of the guide rail is connected with the lifting rope, wagon springs, this is

only the lifting platform weight is sufficient to pull spring, avoid contact with the

brake

lever.

If

the

rope

breaks,

truck

spring

will

pull

the

ends

of

vertical

weakened,

and

the

brake

lever

occlusal,

can

be

firmly

fixed

without

in

situ

platform continues to fall.

Otis has become the center of attention. The first lift not Otis invented, but he

was the first

industry, but also for those who want to build more tall buildings to add more

available space design are open thoroughfare.

However it can be called the elevator ( electric energy to drive the elevator ) of

the product should be at the beginning of the twentieth Century emerged.

Elevator technology development trend

(1): green environmental protection concept is the development trend of

elevator.

Have

expert

prophecy

who

first

introduced

green

products

and

market

of

race

to

control,

who

will

grasp

the

market

competition

initiative

Development trend to basically have : the continuous improvement of product

design, production

of environmental

protection type

low

power consumption,

low noise, no leakage, no water leakage, no electromagnetic interference, no

oil

pollution

of

the

elevator

hoistway

guide.

Elevator

traction

with

nylon

synthetic

fiber

rope,

steel

belt

without

lubricating

oil

pollution

traction

mode.

Elevator

decoration

will

use

no

(little

)

environmental

pollution

material.

Elevator

no-load

rise

and

full

of

descending

motor

power

regeneration

recycling

technology.

The

installation

of

lifts

will

be

installed

without

scaffolding.

Elevator

parts

in

the

production

and

use

of

the

process

has

no

effect on the environment ( such as brake pads must not use asbestos ) and

materials

can

be

recycled.

(2)

the

application

of

Bluetooth

technology

in

elevator.

Installation

of

elevators

knows

line,

on

line

is

time-consuming,

laborious, easy wrong job. If the control screen and calling system through the

Bluetooth

wireless

call

will

be

connected

to

the

elevator

control

another

revolution at the same time bring us enormous benefits. A installation period

will be reduced by more than 30%, the direct benefits of reduced installation

costs,

customers

from

booking

to

use

lift

cycle

cost

reduce

the

ladder

and

improve

cash

flow

rate.

B

on

the

elevator

using

Bluetooth

technology

will

make

the

elevator

control

system

using

a

large

amount

of

the

latest

and

fastest

computer,

which

will

further

improve

the

elevator

machine

reliability,

fault

rate

is

greatly

reduced,

the

control

precision

is

further

increased,

the

result is the elevator more comfortable, more accurate flat layer. C is a good

solution

to

the

elevator

control

and

peripherals

compatible

and

contact.

In

particular

can

take

the

elevator

and

escalator

induction

to

the

building

management system or intelligent management district system.

Elevator System Based on PLC

Composed by the order of relay control system is a realization of the first

elevator control method. However, to enter the nineties, with the development

of

science

and

technology

and

the

widespread

application

of

computer

technology, the safety of elevators, reliability of the increasingly high demand

on the relay control weaknesses are becoming evident.

Elevator

control

system

relays

the

failure

rate

high,

greatly

reduces

the

reliability

and

safety

of

elevators,

and

escalators

stopped

often

to

take

with

the staff about the inconvenience and fear. And the event rather than taking

the lift or squat at the end of the lift will not only cause damage to mechanical

components, but also personal accident may occur.

Programmable

Logic

Controller

(PLC)

is

the

first

order

logic

control

in

accordance with the needs of developed specifically for industrial environment

applications

to

operate

the

electronic

digital

computing

device.

Given

its

advantages, at present, the relay control the lift has been gradually replaced

by PLC control. At the same time, AC variable frequency motor speed control

technology, the way the lift drag speed has been a gradual transition form DC

to

AC

frequency

converter.

Thus,

PLC

control

technology

increases

VVVF

Elevator modern technology has become a hot industry.

1. PLC elevator control advantages:

(1) Used in elevator control PLC, with so ware for automatic control of lift

operation, reliability greatly increased.

(2)

Layer

was

removed

and

majority

of

the

relay,

the

control

system

structure is simple, simplify the external circuit.

(3)

PLC

can

be

a

variety

of

complex

control

system,

easy

to

add

or

change control functions.

(4) PLC can

be

automated fault

detection and alarm

display

to

improve

the operation of security and ease of maintenance.

(5)

For

the

group

control

the

allocation

and

management,

and

improve

the efficiency of elevator operation.

(6)Do

not

need

to

change

the

control

scheme

changes

when

the

hardware connection.