SENSING
Sensing in Elevator
There are four primary types of elevator movement mechanisms: traction, hydraulic, vacuum and climbing. Sensors used in all types of elevator include infrared, level, current, load and hall-effect sensors, limit switches and encoders. Encoders are used to detect motor’s rotation speed so as to control the motion and position of elevator car. Meanwhile, current sensors detect motor’s working current based on which the power of motor could be adjusted to a proper level. Leveling sensors transmits floor number of car to control center in order to activate brake mechanism and make sure elevator stops desired level.
Sensors, achieving this, are actually optoelectronic sensors or smart position sensors mounted in elevator shaft or at top of car. Also, some elevators use hall-effect sensors to sense car position. To prevent elevators from running off the rails, limit switches are required to set a highest and a lowest position for car. Infrared sensors are located in car to detect obstacles at doors with purpose to prevent passengers from being caught between doors. In addition, there is a load sensor mounted at the bottom of car to monitor load and initiate the overloading alarm as required.
The rapid development of sensor technology will bring more products of different unique capabilities to modern elevators, and is bound to make them more intelligent and environment-friendly in the future.
Hover over the diagram blocks to view recommended products for this solution:
Detect motor's rotation speed
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Detect motor's rotation speed
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Optical slot sensor or Hall effect sensor, detect the position of car
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Optical slot sensor or Hall effect sensor, detect the position of car
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Optical slot sensor or Hall effect sensor, detect the position of car
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Used to prevent elevators from running off the rails
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Used to prevent elevators from running off the rails
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Both infrared receiver or light curtain can be used to detect obstacles between elevator doors
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Motor Driver
New TEXAS INSTRUMENTS
ON SEMICONDUCTOR
MICROCHIP
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Microcontroller
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 | DM330015 Motor Control Starter Kit with mTouch Sensing The Motor Control Starter Kit with mTouch Sensing is a complete hardware and software tool suite for evaluating Microchip’s ultra-low cost Motor Control Family dsPIC DSCs. It contains a single board with a BLDC motor, capacitive-touch sliders and a built-in debugger. |
| KÜBLER | Encoder | Installing instructions for rotary encoders | Click here | ||
| AUTONICS | Encoder | E40 Series Application | EN40 | Click here | |
| PEPPERL & FUCHS | Encoder | Rotary Encoders with high-level functional safety | Click here | ||
| PEPPERL & FUCHS | Encoder | Sensors for doors,gates and elevators | Click here | ||
| OPTEK TECHNOLOGY | Slot Sensor | Application Guidelines for the OPB Series | AB249 | OPB Series | Click here |
| VISHAY SEMICONDUCTOR | IR Sensor | Application Overview | TSOP Series | Click here | |
| VISHAY SEMICONDUCTOR | IR Sensor | Circuit Description of the IR Receiver Modules | TSOP Series | Click here | |
| Manufacturer | Product Type | AN Title | AN Number | Part Number | URL |
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| BROADCOM | Encoder | Encoders for Drive By Wire Automobiles | Click here |
| BROADCOM | Rotary Encoder | Implementation of a DSP-based 20-bit High Resolution Quasi-Absolute Encoder for Low-Speed Feedback Control Applications | Click here |
| Manufacturer | Product Type | White Paper Title | URL |
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| GRAYHILL | Encoder | Optical Encoders | Click here | |
| HONEYWELL S&C | Limit Switch | Micro Switch™ Basic Switches | Click here | |
| HONEYWELL S&C | Current Sensor | Current Sensor | Click here | |
| OPTEK TECHNOLOGY | Encoder | Optical Encoders | Click here | |
| Manufacturer | Product Type | Training Title | Part Number | URL |
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