Description
CMA137 Protective devices
CMA137 Protective devices
Module Clips Drive controller servo moto
CMA137 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
4.2 Working principle of surface acoustic wave touch screen
Take the X-axis transmitting transducer in the lower right corner as an example: the transmitting transducer converts the
electrical signal sent by the controller through the touch screen cable into sound wave energy and transmits it to the
left surface, and then uses a set of precision reflection stripes under the glass plate The sound wave energy is reflected into
an upward uniform surface and transmitted. The sound wave energy passes through the surface of the screen, and then is
gathered into a line to the right by the upper reflection stripes and transmitted to the X-axis receiving transducer. The receiving transducer
will return the surface acoustic wave. The energy becomes an electrical signal.
When the transmitting transducer emits a narrow pulse, the sound wave energy reaches the receiving transducer through different paths.
The one on the far right arrives earliest, and the one on the far left arrives last. The early and late arrivals are superimposed into one For a
wider waveform signal, it is not difficult to see that the received signal collects all the sound wave energy that has returned after different long
and short paths in the X-axis direction. The distance they have traveled on the Y-axis is the same, but on the The nearest one has traveled twice
the maximum distance on the X-axis. Therefore, the time axis of this waveform signal reflects the position of each original waveform before superposition, which is the X-axis
coordinate. When there is no touch, the waveform of the received signal is exactly the same as the reference waveform. When a finger or
other object that can absorb or block sound wave energy touches the screen, the sound wave energy traveling upward along the X-axis through
the finger is partially absorbed, which is reflected in the received waveform, that is, there is an attenuation gap in the waveform at a
certain moment. The received waveform corresponds to the signal attenuation of a gap in the part blocked by the finger. Calculating the position
of the gap means that the touch coordinate controller analyzes the attenuation of the received signal and determines the X coordinate based on the
position of the gap. Then the same process for the Y axis determines the Y coordinate of the touch point. In addition to the X and Y coordinates
that general touch screens can respond to, surface acoustic wave touch screens also respond to the third axis Z-axis coordinates, which means
they can sense the value of the user”s touch pressure. The principle is calculated from the attenuation of the received
signal attenuation. Once the three axes are determined, the controller transmits them to the host.
4.3 Characteristics of surface acoustic wave touch screen
The clarity is higher and the light transmittance is good. Highly durable and good in scratch resistance (compared to surface film on resistors,
capacitors, etc.). Very responsive. Not affected by environmental factors such as temperature and humidity, high resolution and long life (50 million
times with good maintenance); high light transmittance (92%), able to maintain clear and translucent image quality; no drift, only required
during installation One-time correction; it has a third axis (i.e. pressure axis) response and is currently used more in public places. Surface acoustic wave screens
require regular maintenance, because dust, oil and even beverage liquids contaminating the surface of the screen will block the wave guide
groove on the surface of the touch screen, preventing the waves from being emitted normally, or causing the waveform to change and the
controller to be unable to recognize it normally, thus affecting the performance of the screen. For normal use of the touch screen, users must
pay strict attention to environmental hygiene. The surface of the screen must be wiped frequently to keep it smooth, and a complete wipe must be performed regularly. ”
Contact: Mr. Lai
Wechat:17750010683
Whats app：+86 17750010683
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QQ: 3221366881
3221366881@qq.com
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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
