There are two practical applications for Infrared Curtain Sensor. One uses only a transmitter and receiver, while the other incorporates a controller, transmitter, and receiver, with the transmitter and receiver mounted on both sides. A digital program, controlled by a single-chip microcomputer and microprocessor, enables the infrared receiving unit to scan at high speed, forming an infrared light curtain alarm barrier. When a person enters the light curtain barrier area, the control system rapidly converts the output level signal to initiate load action. When the person leaves the light curtain warning area, the load automatically shuts off, achieving safety protection.
1. When there is no intrusion into the protected area, the receiver of the Safety Infrared Curtain Sensor is in the light receiving state. At this time, the receiver's communication indicator (red) turns off and the light indicator (yellow) turns on. The operating switch of the protected equipment can operate normally.
2. When an object (at least a recoverable object or resolution) intrudes into the protected area of the safety screen, the receiver's red indicator lights up (or the receiver loses power, or the fiber optic communication may be blocked). At this point, the protected equipment is controlled and forced to pause.
3. When the intruding object exits the protected area, the perforated protector returns to its normal state, and the equipment resumes operation.
4. After the safety grating sensor enters the working state, use a test rod with the smallest diameter (or a transparent object with the same diameter to vertically invade the protection zone and switch the protection zone clockwise. At this time, the photoelectric protector should always light up the red indicator light, and the control device should not work.
FAQ
Q： How to choose the right Infrared Curtain Sensor?
1. Select the appropriate optical axis spacing, depending on the body part to be protected.
For example, the spacing for finger protection can be 10 mm, for hand protection 20 mm, for arm protection 40 mm, and body protection 80 mm. The optical axis spacing refers to the distance between the centerlines of the two light spots.
2. Determine the height of the protection zone. The height of the protection zone refers to the effective protection area. For example, the protection height of a machine tool should not be less than the travel adjustment of the machine tool rollers. For other machinery or hazardous areas, select a photoelectric protection device of appropriate specifications based on the height of the area to be protected.
3. Determine the spacing.
The distance between safety devices is the hazardous area that cannot be touched by the operator until the movable hazardous equipment is completely stationary. This distance can be selected based on the length of the machine table or the protection zone.
4. Select a controller; either an external or internal controller can be selected as needed.
Q： How to Ensure the Safety and Correctness of Infrared Curtain Sensor Installation
Safety light gratings, as important safety devices in industrial production, are often used on machinery or in high-risk environments with potential hazards. In many cases, the equipment and environmental requirements for safety light gratings not only determine safety levels but also ensure effective and reliable prevention of hazards and safe and correct installation.
1. Determine the minimum safe distance between the safety light grating and the hazardous point. When an object or person enters the protected area, the safety light grating transmits a signal. Before a person reaches the hazardous point, the equipment stops operating under signal control, allowing the safety light grating to fully perform its protective function.
2. Select the optical axis spacing of the safety light grating.
The optical axis spacing determines the protection accuracy, resolution, and precision of the Infrared Curtain Sensor. If the optical axis spacing does not match the minimum diameter of the actual object to be protected (or detected) when the safety light grating is installed, even light grating products with higher safety standards can cause safety accidents.
3. Safety light grating installation must ensure that the protection range of the safety light grating is optimized, including the protective height and protection distance. When selecting a specific safety light curtain, you should clearly understand the specific data for the protection range, whether there are blind spots during installation, the location and size of blind spots outside the protection zone, and how to fully select the optimal safety solution to effectively eliminate or avoid them.
4. Select an appropriate installation method based on the actual installation situation.
Whether the equipment and hazardous environment to be protected require a controller, whether enhanced seismic resistance is required, and whether a mounting bracket with reinforced and seismic properties should be selected.
To ensure that the safety light curtain effectively prevents operators from directly contacting dangerous moving parts or entering the hazardous area, it is recommended that when installing a safety light curtain on a machine, in addition to the safety grade standard, the specific product model and requirements of the installed Infrared Curtain Sensor should be considered, as well as the protective effect of the safe and correct use of the safety light curtain.
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