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You’ve almost certainly experienced a broken elevator. In the case of public elevators, the immediate impacts on individuals are obvious: people kept from home, late for work and unnecessarily expensive repairs.
That´s why, at IMH, we are developing a Digital Twin is of public elevators, to seamlessly improve maintenance. The failure, maintenance, and deployment of systems small and large are critical contributors to success.
A wireless sensor inside elevator cabin tracks every movement of the elevator cabin. We have defined a set of alarms:
- Destination floor not reached.
- Elevator doors did not open.
- Shock in elevator cabin.
- Sound anomaly.
Do you want to see the Digital Twin by yourself? You are welcome, just use these demo credentials.
User: demo
Password: Twin2022
1.1 What problem are we going to solve with the DIGITAL TWIN?Did you know that riding in an elevator used to be dangerous business? So, it was until Elisha Otis, of Otis Elevator Company fame, invented a device that could prevent a passenger elevator from falling if its rope broke. It debuted precisely 160 years ago at the E.V. Haughwout and Company store in Manhattan on March 23, 1857.
Otis had demonstrated how it worked a few years earlier in a dramatic demonstration at America’s first world’s fair at the Crystal Palace (now Bryant Park) in New York City. He rode the platform high in the air and ordered the rope cut. The crowd cheered, but the elevator stopped in place safely. This was the starting point for massive elevator adoption. Today, we have public elevators to help us get to our homes in the city. But you've almost certainly experienced a broken elevator. That´s why, at IMH Advanced center in Manufacturing, we are developing a Digital Twin is of public elevators in Ermua, to seamlessly improve maintenance.In the next image you can see the full set of parameters retrieved in the Digital Twin.
The wireless sensor inside the elevator cabin in charge of sensing, is based on a STM32WB55CG which has 1 MByte of flash memory and 256 kBytes of SRAM; and the BMA400 low-power accel for wake-on-motion. Height variation is tracked precisely on every wakeup interval. The board sleeps at ~7 uA current and uses a few mA in "normal" operating mode.
As you can see, the sensor node is intended to be placed inside the elevator cabin. You can see below a 3D render of the PCB on it´s enclosure.
The enclosure is metallic gray and has rounded edges so that it mimics with metal surface in the elevator and does not draw much attention.
We 3D printed some units of the enclosure with PLA for prototyping. You can see that the surfaces are not totally smooth due to the printing process but the overal end result is quite good.
The sensors are finally installed and fit quite nicely.
Would you like to see one of the real elevators where the development is running? Here you have a photo.
Finally, here is the Dashboard for Visual Analytics. You can have a closer look in this link: https://tabsoft.co/3m1Gyne
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