Simple Arduino based 4 Floor Elevator project by Seyedreza Fattahzadeh

Author:Seyedreza Fattahzadeh [Fattahzadeh, Seyedreza]
Language: eng
Format: epub
Published: 2015-04-03T22:00:00+00:00

Figure 1-4

Functional explanation of part # 6: hoist and car door fixture

In Figure 1-2 the piece of fixture that is designated as # 6, is the mechanism designed to simulate Elevator’s hoist (at the top) and car door motors. To view this project in action, you may click on the following link:

http://youtu.be/UQbGcntcVP4

Simulating the host lift and car door motors

The disk on the top of the fixture (see Figure 1-5) simulates the up or down car movement of the elevator easily. There is a cabin of lift which will be moved up or down across different floors, with the help of a small DC motor which its shaft mounted to the center of a disk. In this project of lift, a single motor is used which will turn the disk clock or anticlockwise. When the disk is turning clockwise, it is simulating downward car movement. On the contrary, when it is being turned anticlockwise, it is simulating upward car movement.

This project is simulating operation of a lift with four stops. For floor detection and to generate an arrival signal of the car to any selected stop, four slotted optocouplers are used (4 pieces shown in blue color). For this project, I needed four photo interrupters- each is a small device that shines a light from one side to the other, where there is a detector.

The idea is that if anything breaks the light beam, you take note of it, and use the information (signal) as you wish. In my case, I am using a disk which has a small rectangular area cut off from it, thus the beam will be broken except for that one 'spot'. I have installed four optocouplers around the disk corresponding to four floors. Thus, when the cut in section creates an interrupt at any related optocoupler, Microprocessor deletes the stop number and performs appropriate action accordingly. I used a total of six slotted optocouplers in this lift implementing project, one sensor for each stop and two more to detect if the car door is open or closed.

The half disk located at the bottom of the piece # 6 is related to opening and closing mechanism of the car door. Notice again that I have used two more optocouplers to detect if the door is open or closed. When sensor # 5 is interrupted (= 0) but sensor # 6 is uninterrupted (= 1), the status of the door is 'open'. To close the door, controller has to activate the door motor in anticlockwise (in the direction shown with the blue arrow) to cause Sensor # 5 = 1and Sensor # 6 = 0.

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