DWIN SAW (Surface Acoustic Wave) Touch screen Successfully Passes the Elevator Project Test
A Surface Acoustic Wave (SAW) touch panel operates by detecting changes in acoustic wave propagation across the cover glass surface to identify touch input. With excellent light transmission, rapid response, a long service life, and immunity to environmental influences like temperature and humidity, SAW touch panels are exceptionally well-suited for demanding applications requiring high reliability, including explosion-proof environments.
DWIN recently collaborated with a tech company in developing an elevator floor control panel based on SAW technology. This solution replaces the traditional mechanical buttons, offering more interactive touch experience and ensuring long-lasting durability.
Touch Panel Performance and Parameter Table
|
Electrical Parameters |
|
|
Operating Voltage |
DC 24 V/AC 220 V |
|
Operating Current |
＜200 mA |
|
Display Mode |
LED |
|
Touch Method |
Single-point Touch |
|
Touch Activation Force |
< 1 ounce (15g, adjustable) |
|
Reaction Time |
＜30 ms |
|
Foreign Object Removal Time |
3 seconds (starting from stabilization). |
|
Structure Parameters |
|
|
Exterior Dimension |
420 mm×352 mm×27 mm |
|
Touch Area |
304 mm×228 mm |
|
Button Dimension |
32.5 mm×32.5 mm |
|
Number of Virtual Buttons |
38 (Floor (1-34、B1、B2))+Door Open(1)+Door Close(1)) |
|
Number of Physical Buttons |
1 (Emergency Call) |
|
Toughness & Resistance |
|
|
Hardness |
The surface has a hardness rating of 6.5 on the Mohs scale |
|
Scratch Resistance |
High hardness, not apt to scratch and remains functional despite scratch |
|
Working Evironment |
|
|
Operating Temperature |
-20 ºC-70 ºC (No condensing) |
|
Operating Humidity |
10 %~90 % |
|
Storage Temperature |
-30 ºC-80 ºC (No condensing) |
|
Estimated Lifetime |
50 million times |
|
Electromagnetic Environment |
|
|
Resistance to Working Magnetic Field |
30 A/m (50Hz) |
|
Radiation Resistance |
10 V/m (80-1000 MHz) |
|
3 V/m (1400-6000 MHz) |
|
|
ESD Resistance |
15 kV |
|
Surge |
2.0 kV |
|
Resistance to Electric Fast Transient/Burst |
1.0 kV |
The testing and validation of elevation floor control panel was conducted in a newly constructed building. The SAW touch panel was installed into the elevator, followed by a comprehensive function test. After confirming that the elevator works properly, the touch panel was tested by pressing buttons for different floors. The elevator could reach the intended floor, opening door and closing door accurately. During the descending test, after pressing button for different floors, the elevator started from the highest floor, stopped at the designated floor sequentially, closing and opening doors without error.
The elevator demonstrated stable and reliable performance throughout the testing process, with all control operations functioning as expected. This successful test has proven the broad application prospects of surface acoustic wave touch technology in elevators.
Touch Panel Installation Photo
Elevator Operation Test: Mechanical Buttons (Left) SAW Touch Panel (Right)
