Safety light curtain is photoelectric safety device (also known as security protection, punch, infrared safety protection devices the protection, and so on). In the factory in the modern, man and machine working together, on a number of potentially dangerous mechanical devices, punching machine, cutting equipment, metal-cutting equipment, automatic assembly lines, automated welding lines, mechanical handling devices, danger zone (toxic, high pressure, high temperature), easily lead to operator injury.
Safety light curtains from lighting device and optical device made up of two parts. Modulation of light emitting infrared light is received by the light, forming a protective NET, when there are objects entering the net, when from which block light objects, through the internal control circuit, optical circuit to provide an immediate response, namely in the output section output a signal for machine tools such as punches, press brakes. Light curtain has a very wide range of applications, for example, will need to continue to send them on metal stamping equipment, contact safety door if installed, you need to switch operators often protective door, it will not only increase the workload of operational staff, and reduced productivity. In this case, gratings and screens is the best choice. When operators send reclaimer, as long as the trip the light in any part of the body, would cause the machine to enter the Security State and will not cause injury to the operator.
Safety light curtains of the beam density determines the volume of large parts of the body through the light curtain is detected. According to the ergonomic data, adult finger diameter should not be less than 14mm, Palm thickness not less than 30mm, wrist diameters of not less than 40mm, for example: If you use the optical axis spacing is 40mm, shaft diameter is 20mm, and its resolution is 40+20=60mm, then the hand value, hand, wrist and arm are possible through the light curtain will not be found. Therefore, if you want more security, have to use higher-resolution screens.
When you use gratings and screens, has certain requirements for installation, and personnel are not allowed to bypass grating light curtain and into the danger zone, also does not allow the grating and the light curtain near the reflecting surface, enables receivers to receive the reflected light and security switch signals cannot be output. In addition, grating and screens to the environment there is also a requirement, if dust is too large in the environment, affects the emission of light, which affect the use of gratings and screens.