Description
REF543KB127AAAA Protective devices
REF543KB127AAAA Protective devices
Module Clips Drive controller servo moto
REF543KB127AAAA Protective devicesSuitable for steel manufacturing, thermal power generation, hydroelectric power generation, nuclear power generation, wind power generation, gas supply, and other glass manufacturing, paper mills, mechanical manufacturing, electronic manufacturing, automotive manufacturing, aviation manufacturing, chemical manufacturing, coal mining and selection, oil and natural gas mining and selection, metal mining and selection, and non-metallic mining and selection
Introduction to the development of touch screen technology
The application of touch screens has become more and more common with the development of the information society. Currently, touch
screen products have begun to form an industry in China. This article introduces the relevant basic technical knowledge about touch screens
for the reference of users and industry players.
With the increasing number of multimedia information inquiries, people are talking more and more about touch screens, because as the latest computer
input device, touch screens are currently the simplest, most convenient, natural and suitable for China”s multimedia information inquiry national conditions. Equipment,
touch screen has many advantages such as durability, fast response, space saving, easy communication and so on. Using this technology, our users can operate the host
by simply touching the icons or text on the computer display with their fingers, making human-computer interaction more straightforward. This technology greatly facilitates
those who do not understand Computer operating users. This kind of human-computer interaction. It gives
multimedia a new look and is a very attractive new multimedia interactive
device. The application range of touch screens in our country is very broad,
mainly including public information inquiries, such as business inquiries in telecommunications bureaus,
tax bureaus, banks, electric power and other departments; information inquiries
on urban streets; in addition, it can also be widely used in leadership offices, industrial control, Military command, electronic games,
ordering songs and dishes, multimedia teaching, real estate pre-sales,
etc. In the future, touch screens will also enter homes. As cities develop toward informatization and computer networks penetrate
into daily life, information queries will appear in the
form of touch screens that display content that can be touched. This article provides some basic technical knowledge about touch
screens. I hope this content will be useful to the majority of users.
basic techniques
1. Working principle of touch screen
For operational convenience, people use touch screens instead of mice or keyboards. When working, we must first touch the
touch screen installed on the front of the monitor with our fingers or other
objects, and then the system locates and selects information input based on the location of the icon or menu touched by the finger.
The touch screen consists of a touch detection component and a touch
screen controller; the touch detection component is installed in front of the display screen to detect the user”s touch position,
and then sends it to the touch screen controller; and the main function of the
touch screen controller is to receive touches from the touch point detection device information, convert it into contact
coordinates, and then send it to the CPU. It can also receive commands from the CPU and execute them.
2. Main types of touch screens
To distinguish touch screens from the technical principles, they can be divided into five basic categories: vector pressure
sensing technology touch screen, resistive technology touch screen, capacitive
technology touch screen, infrared technology touch screen, and surface acoustic wave technology touch screen. Among them,
the vector pressure sensing technology touch screen has withdrawn from the
stage of history. The touch screen infrared screen is cheap, but its frame is fragile and prone to light interference and distortion on curved
surfaces; the capacitive screen design theory is good, but its image
distortion problem is difficult to fundamentally solve; the resistive screen has accurate positioning, but its price It”s quite high, and it”s afraid
of being scratched and easily damaged. The surface acoustic wave
touch screen solves various defects of previous touch screens. It is clear and anti-violence and suitable for various occasions. T
he disadvantage is that water droplets and dust on the surface of the screen can
make the touch screen dull or even stop working. According to the working principle
of the touch screen and the medium for transmitting information, we divide the touch screen into four types, which are resistive type
, infrared type, capacitive induction type and surface acoustic wave type. Below,
the author will briefly introduce the various types of touch screens mentioned above. :
1. Resistive touch screen
The screen part of the resistive touch screen is a multi-layer composite film that is very suitable for the display surface. It is composed of
a layer of glass or organic glass as the base layer, and the surface is
coated with a transparent conductive layer (OTI , indium oxide), and then covered with a layer of The outer surface of the hardened, smooth and
scratch-resistant plastic layer is also coated with a layer of OTI on the
inner surface. There are many small (less than one thousandth of an inch) transparent isolation points between the two conductive layers to separate
them and insulate them. When a finger touches the screen, a contact point appears between the two OTI conductive layers. Because one of the
conductive layers is connected to a 5V uniform voltage field in the Y-axis
direction, the voltage of the detection layer changes from zero to non-zero. The controller detects this After it is turned on, perform A/D conversion
and compare the obtained voltage value with 5V to obtain the Y-axis
coordinate of the touch point. Similarly, the X-axis coordinate can be obtained. This is the most basic principle common to resistive technology
touch screens. . Resistive screens are divided into four-wire, five-wire
and other multi-wire resistive touch screens according to the number of lead wires. The A side of the five-wire resistive touch screen is made of
conductive glass instead of a conductive coating. The process of
conductive glass greatly improves its lifespan and can increase the light transmittance.
The OTI coating of the resistive touch screen is relatively thin and easily brittle. If it is applied too thickly, it will reduce the light transmission and
cause internal reflection to reduce the clarity. Although a thin plastic protective
layer is added to the OTI, it is still easily affected by sharp objects. Destruction; and because it is often touched, the surface OTI will appear fine cracks
or even deform after being used for a certain period of time. If one of the outer
OTI points is damaged and breaks, it will lose its role as a conductor, and the life of the touch screen will not be long. However, the resistive touch
screen is not affected by dust, water, and dirt.
This touch screen uses pressure sensing for control. It uses two highly transparent conductive layers to form a touch screen, and the distance
between the two layers is only 2.5 microns. When a finger is pressed on the touch
screen, the two conductive layers come into contact, the resistance changes, and signals are generated in the X and Y directions, which are then
sent to the touch screen controller. This kind of touch screen can work in harsh environments,
but its feel and light transmittance are poor. It is suitable for wearing gloves and situations where direct touch cannot be done with hands. The key
to resistive touch screens lies in material technology. Commonly used transparent conductive coating materials are:
Contact: Mr. Lai
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330780-50-00 3300 XL 11 mm Proximitor Sensor
0100-76124 AMAT Analog I/O VME Module
PP045.0571-K30 Power Panel PP45 5.7″ QVGA color
A1BA4D-05 Terminal Boards (for FIO) YOKOGAWA
MMS3125/022-020 Shaft-Vibration Monitor EMERSON
1756-IR6I ControlLogix analog input module
PPC-R22.1N-N-Q1-NN-NN-FW Rexroth HCS Compact Converters
0100-20100 AMAT Analog I/O VME Module
IC693PWR324 90-30 series 30-watt power supply
RDIOR420 KONGSBERG Control and Monitoring System
FBM242 P0916TA Discrete Output Interface Module
CC-PDIS01 Experion Series-C I/O Module HONEYWELL
FBM216 P0922VV Redundant HART® Communication Input Module
330190-040-00-CN 3300 XL 8mm Proximity Transducer System
FBM217 P0916PW Discrete Input Interface Module FOXBORO
JRMSI-120XBP01200 MOUNT BASE RACK Schneider
FBM217 P0914TR Discrete Input Interface Module
IC693MDL940 90-3- Series Programmable Logic Controller
IC693ALG392 GE Analog Current/Voltage Output
1794-AENT Flex I/O communication adapter Allen-Bradley
1784-CF64 Compact flash card Allen-Bradley
1756-RM ControlLogix enhanced redundancy module
330980-51-00 3300 XL NSv Proximitor Sensor
1794-IB32 Allen-Bradley Flex I/O DC input module
1794-IE12 Flex IO High Density Analog Input Module
1794-OE12 Allen-Bradley Flex IO analog output module
1794-OB32P Determined by installed terminal base
1769-L36ERMA 1769 CompactLogix controller Allen-Bradley
S-073N 3BHB009884R0021 ABB ACS2000 high voltage inverter
1756-OB32 ControlLogix Discrete output module Allen-Bradley
FBM214 P0922VT HART Communication Input Interface Module
PXIE-5105 8-Channel PXI Oscilloscope NI
128164-07-204-10-02-05 3300 XL NSv Proximity Transducer
128164-08-204-10-02-05-RU 3300 XL NSv Proximity Transducer
128164-02-312-05-02-05 3300 XL NSv Proximity Transducer
170133-090-00 PROXIMITY SENSOR MODULE
128164-05-204-10-02-RU 3300 XL NSv Proximity Transducer
3500/40-04-00 Bently Nevada Proximitor Monitor
140734-02 Bently Nevada 3500/42m Proximitor Seismic Monitor
330130-080-01-05-RU 3300 XL Standard Extension Cable
330104-15-25-05-02-05-RU 3300 XL 8 mm Proximity Probes
163179-01 Bently Nevada Temperature Monitors
330180-91-RU Bently Nevada 330180 Proximity Sensor
330196-05-30-10-RU 3300 XL 8mm Reverse Mount Probes
330130-080-12-05 3300 XL 8mm Proximity Transducer System
3500/22-01-01-R0 288055-01 146031-01 Transient Data
330130-070-01-05 3300 XL STANDARD EXTENSION CABLE
330104-00-04-10-02-RU 3300 XL 8 mm Proximity Probes
330180-91-05-RU Bently Nevada 330180 Proximity Sensor
3500/15-04-04-00 Bently Nevada Power Supply
330130-080-12-RU 3300 XL Extension Cable
330750-60-RU High Temperature Velomitor System
330103-00-07-10-02-05 3300 XL 8 mm Proximity Probes
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
