A measuring light curtain is a non-contact measurement device based on infrared photoelectric sensing technology. It primarily emits densely packed infrared beams to form a light curtain array. When an object passes through, the beams are partially blocked. The receiver detects the signal changes and converts them into electrical signals, enabling accurate identification and analysis of object parameters. Its core applications are in the following areas:

What is the function of a measuring light curtain?

Working Principle of a Measuring Light Curtain

A measuring light curtain operates based on an infrared or laser beam obstruction detection mechanism, enabling precise, non-contact measurement of object size and position. Its core components are a transmitter, a receiver, and a controller.

How does a measuring light curtain work?

Safety light barriers are photoelectric safety devices that use infrared beams to monitor hazardous areas and halt equipment if a person approaches, preventing injury. They are most commonly used in the following equipment and applications:

What equipment are safety light curtains most commonly used on?

The installation and commissioning of safety light barriers must follow standardized procedures to ensure reliable protection. The specific steps are as follows:

Installation Process

Preliminary Preparation

How to install and debug the safety light curtain?

A safety light curtain (also known as a safety grid) is a device that uses photoelectric sensing to provide safety protection. Its core operating principle is as follows:

1. Basic Structure

Transmitter: Consists of multiple infrared emitting diodes arranged at equal distances, continuously emitting invisible infrared light beams.

Receiver: Arranged in parallel with the transmitter, accurately receives each infrared light signal.

Control System: Monitors the beam status in real time and triggers safety responses.

Working principle of safety light curtain

The following is a standardized maintenance method for safety light curtains, integrating industry practices and technical specifications:

I. Daily Inspection Points

Optical Path Alignment Verification

Before starting the unit daily, check that the transmitter and receiver are aligned parallel to each other. The offset angle must be ≤±2°.

Use a 40mm wide test baffle to simulate a palm trigger and verify the response sensitivity of each optical path.

Indicator Status Monitoring

Under normal conditions, the transmitter should illuminate red. The receiver should illuminate green when unobstructed, switching to an infrared warning light if obstructed.

Anomalous flashing (e.g., alternating red and green) requires immediate shutdown and investigation.

Environmental Interference Prevention

Remove reflective objects (such as metal plates and glass) from the light curtain path to avoid strong interference. Direct light interference

High-power equipment (inverters, motors) must be kept at least 1m away from the light curtain to prevent electromagnetic interference.

Safety light curtain maintenance methods

Safety Light Curtain Applications in Stamping Equipment

Safety light curtains (also known as safety light grids) serve as critical safety barriers in stamping equipment (such as punch presses and shears). They use infrared beams to monitor hazardous areas in real time, preventing accidents such as pinching and collisions during operation. Key applications include:

Application of safety light curtains in stamping equipment

Safety light barriers have a wide range of applications, primarily in industrial automation, ensuring personal safety and enhancing the intelligence of equipment. The following are some common uses for safety light barriers:

What are the uses of safety light curtains?

Have you ever worked on a punch press in a factory? That thing is, to put it bluntly, a “tiger’s jaws,” biting down and down to press steel into shape. But if your hand is still inside when it bites down… you know the consequences: pinching or severed fingers, potentially requiring hospitalization at best, or lifelong disability at worst.

The principle and function of safety light curtain application on punch press

Factories are filled with the roaring noise of various machines, and a moment of inattention while walking could lead to getting caught in danger. To protect the safety of operators, safety light curtains have become a “lifesaver” for many enterprises. Although invisible and intangible, their role is quite significant. Today, let’s talk in the simplest and most straightforward way about the real functions of safety light curtains.

The functions of a safety light curtain include