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Safety light curtain analysis

Time:2022-09-01 Views:


  Safety light curtains have a very wide range of applications, such as on stamping equipment that needs to be continuously fed and withdrawn. If a contact safety door is installed, the operator needs to open and close the door frequently, which not only increases the workload of the operator, but also Reduced production efficiency, in this case, the use of gratings and light curtains is the best choice. When the operator is feeding and taking materials, as long as any part of the body blocks the light, it will cause the machine to enter a safe state and not give the operator. cause harm.

The density of the safety light curtain beam determines how large the body part can be detected through the light curtain. According to ergonomic data, the diameter of an adult's finger should not be less than 14mm, the thickness of the palm should not be less than 30mm, and the diameter of the wrist should not be less than 30mm. Less than 40mm. For example, if the optical axis spacing of the light curtain used is 40mm, the optical axis diameter is 20mm, and its resolution is 40+20=60mm, then the hand value, palm, wrist and arm may pass through the light curtain. will not be discovered. Therefore, if you want to achieve higher safety, you need to use a higher resolution light curtain

When using gratings and light curtains, there are certain installation requirements. It is not allowed that people can bypass the gratings and light curtains and enter the hazardous area. It is also not allowed to have light-reflecting surfaces near the gratings and light curtains, so that the receiver can receive them. The reflected light cannot output the safety switch signal. In addition, there are certain requirements for the use environment of the grating and light curtain. If the dust in the environment is too large, it will affect the emission of light, thus affecting the use of the grating and light curtain.