How Does the Elevator Light Curtain Sensor Protect Passengers' Safety?
In an elevator's safety system, there is an invisible yet extremely crucial "invisible guardian" — the elevator light curtain sensor. It enables the elevator door to automatically detect obstacles before closing, preventing passengers from being trapped and providing intelligent protection for daily elevator rides.
Today, the technical team from A-FLY Escalator & Elevator Parts Supplier will elaborate on the working principle of the elevator light curtain sensor and how it safeguards passengers' safety.
I. What is an Elevator Light Curtain Sensor?
An elevator light curtain sensor is an intelligent safety device that adopts infrared correlation sensing technology.
It is usually installed on the door frames on both sides of the elevator car door and consists of two parts:
Transmitter: Emits multiple infrared light beams.
Receiver: Receives infrared signals and monitors for interruptions.
When the light curtain area formed by infrared rays is blocked by a person or object, the system immediately sends a signal to the control panel, instructing the elevator door to stop closing and reopen. This effectively prevents accidents of people or objects being trapped.
Simply put, the light curtain sensor is the "eyes" of the elevator door, responsible for detecting whether the door area is safe.
II. Working Principle of the Elevator Light Curtain Sensor
The light curtain sensor constructs an "invisible protective net" by forming dozens to hundreds of infrared light beams on both sides of the door.
When a passenger or object enters the door area, the infrared light beam is interrupted, and the sensor immediately detects it and sends a signal.
This process includes three steps:
Detection: The infrared light beam is interrupted.
Identification: The control module confirms the presence of an obstacle.
Execution: The signal is transmitted to the elevator control system, the door motor reverses its operation, and the door reopens.
The entire response process takes only 10 to 20 milliseconds, much faster than the reaction speed of traditional mechanical contact plates.
A-FLY's elevator light curtain sensor adopts a high-sensitivity infrared module and anti-interference circuit, enabling accurate operation even in dusty, strong light or high-humidity environments.
III. How Does It Protect Passengers' Safety?
The elevator light curtain sensor plays multiple protective roles during elevator operation:
Preventing Trapping of People and Objects
When passengers, luggage, strollers or other objects enter the door area, the light curtain immediately detects the obstacle, and the door automatically rebounds to avoid accidents.
Protecting Children and the Elderly
For passengers with slow movements, the high-sensitivity induction of the light curtain keeps the door open, preventing accidental pinching.
Enhancing Operational Comfort
Compared with mechanical contact plates, the light curtain achieves true "contactless protection", making the opening and closing of elevator doors smoother and quieter.
Supporting Intelligent Linkage Function
High-end light curtain sensors can link with the elevator's main control system to realize voice prompts or automatic delayed door closing, further enhancing the safety experience.
IV. Advantages of the Light Curtain Sensor
Compared with traditional protective devices, modern elevator light curtains have obvious advantages:
Faster response: Millisecond-level detection speed.
Wider coverage: The number of light beams can reach 32 to 174, covering the entire door body.
Longer service life: The electronic induction system requires no mechanical contact, resulting in a longer maintenance cycle.
High installation compatibility: Compatible with door motor systems of various elevator brands.
A-FLY's light curtain sensor series features a dustproof and waterproof design, stable signals and strong compatibility, suitable for new elevator installation and old elevator renovation projects.
V. Why Choose A-FLY's Elevator Light Curtain Sensor?
As a professional escalator and elevator parts supplier, A-FLY has years of industry experience, with product coverage including:
Elevator light curtain sensors
Elevator door locks and door control panels
Elevator buttons and display screens
A-FLY's light curtain products have passed multiple international certifications. Adopting high-strength casings and industrial-grade chips, they possess super anti-interference ability, accurate induction performance and long-life design, making them a trusted safety choice for global customers.
VI. Summary: Invisible Infrared Rays, Visible Safety
Although small in size, the elevator light curtain sensor is an important guarantee for passengers' safety.
With the power of technology, it builds an "invisible safety line" for people every time the elevator door opens and closes.
Choose A-FLY to make your elevators smarter, safer and more reliable.
A-FLY — Professional Escalator & Elevator Parts Supplier, Safety Starts with Every Detail.
