What Is the Resolution of a Safety Light Curtain?
Safety light curtains are important safety protection devices in modern industrial automation, used to prevent people from entering dangerous areas when operating machinery. They emit and receive infrared beams to detect whether objects or people enter the working area, thereby triggering the equipment to stop or take other safety measures. One of the key technical indicators is the resolution of the safety light curtain, which directly affects the detection accuracy and application scenarios of the equipment.
What Is the Resolution of a Safety Light Curtain?
The resolution of a safety light curtain, in simple terms, is the smallest object size that the light curtain can detect. It is usually expressed in millimeters (mm) and represents the smallest diameter of an object or obstacle that the light curtain can identify. For example, if the resolution of a safety light curtain is 14mm, it means that it can detect objects with a diameter of 14mm or larger.
Factors Affecting the Resolution of Safety Light Curtains
The resolution of a safety light curtain is closely related to the distance between the light beams. The light curtain consists of multiple transmitters, which send out multiple parallel infrared light beams, and receivers, which receive these beams. If the distance between the beams is smaller, it means higher detection accuracy and higher resolution. Conversely, the resolution is relatively low when the beam distance is larger.
In addition, the installation height and environmental conditions of the light curtain will also affect the resolution. Higher installation requirements may require higher resolution to protect more delicate parts during operation.
Application Scenarios of Safety Light Curtains with Different Resolutions
The resolution of the safety light curtain will vary depending on the application requirements. In industrial applications, different types of workplaces have different requirements for resolution:
Finger protection:
Hand protection:
Arm / body protection:
Detection capability
10mm diameter
Detection capability
20/30/40mm diameter
Detection capability
80/200mm diameter
· Finger protection:
If the operator's fingers or hands need to be protected, a light curtain with a higher resolution, such as a light curtain with a resolution of 14mm, is usually selected. This type of light curtain is suitable for precision machining sites, and can quickly detect the entry of smaller objects such as fingers, and trigger the equipment to stop in time.
· Hand protection:
In situations where the hand or a larger area needs to be protected, a light curtain with a resolution of 20-30mm is usually selected. This type of light curtain is mostly used in automated production lines, robot work areas and other occasions, which can provide sufficient protection without being too sensitive due to accidental touches.
· Arm/body protection:
In applications where the human body needs to be protected from entering dangerous areas, light curtains with lower resolutions, such as light curtains of 40mm and above, can effectively detect the operator's body entering the dangerous area. This type of light curtain is suitable for environments that require full body protection, such as storage equipment, logistics systems and large-scale mechanical processing equipment.
Principles for Selecting the Resolution of Safety Light Curtains
When selecting a safety light curtain, the resolution should be determined based on the specific work scenario and safety requirements. Generally speaking, the higher the resolution, the higher the detection accuracy and the more comprehensive the protection, but the corresponding cost will also increase. Therefore, in practical applications, it is necessary to balance the resolution with cost and performance.
Precision operation:
High-resolution light curtains are preferred to ensure the safety of the operator's fingers and hands.
Conventional industrial operations:
Medium-resolution light curtains can be selected to ensure that the palm or body does not enter the dangerous area.
Wide area protection:
Suitable for lower-resolution light curtains, mainly used to detect the entry of larger objects or the operator's entire body.
DADISICK's Hot Selling Safety Light Curtains
Beam spacing：40mm
Number of optical axes: 56
Protection height: 2200mm
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Number of optical axes: 50
Protection height: 3920mm
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Beam spacing: 40mm
Number of optical axes: 32
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Safety sensors for machines outputs (OSSD)2 PNP
Beam spacing: 10mm
Number of optical axes: 164
Protection height: 1630mm
