A configurable visual warning solution for forklift approach points, blind intersections and pedestrian crossing areas using projected signs, warning lights and optional sensor or PLC triggering.
Visual Projection System
Clear floor-level visibility at vehicle crossing
Static signage and painted tape degrade rapidly under forklift tire friction and remain unnoticeable to distracted operators. Moving equipment requires high-visibility warnings placed directly in the line of sight.
Spatial Context
Identify and engineer targeted visual interventions across typical high-risk industrial facility layouts.
Forklift approaching risk occurs where pedestrians and industrial vehicles share or cross the same operating space, especially at blind intersections, aisle exits, doorways and pedestrian crossings. The main visibility problem is that a pedestrian may not see the approaching forklift until the vehicle is already close to the conflict point.
Traditional fixed signs and floor markings remain useful, but they do not change with vehicle movement. In applications where a warning is only relevant while a forklift is approaching, a triggered visual warning can provide additional information directly at the point where the pedestrian or vehicle needs to see it.
The Solution Concept
Rather than relying exclusively on distant wall signs or wearing floor tape, SNT optical systems generate high-lumen, focused safety symbols, virtual lines, and active alert zones right on the floor surface.
Crisp STOP, Pedestrian Cross, or yield symbols projected clearly in up to 1000 lux ambient environments.
Warnings illuminate only when radar, motion sensors, or vehicle tags detect active traffic approaches.
Overhead mounting completely eliminates tire abrasion, chemical wash damage, and replacement downtime.
Adapt warning shapes, sizes, and locations instantly when facility layouts or workflows change.
Light Quality & Retention
Cree Industrial High-Output LEDs
Trigger Integration
Dry Contact / Relay / PLC I/O / Radar
Industrial Ingress Rating
IP65 / IP67 Enclosures
Lifecycle
50,000 Hours Continuous Rating
System Engineering
TRIGGER → PROCESS → PROJECT → AWARENESS
Vehicle or personnel enters the defined danger corridor or intersection boundary.
Industrial control box or sensor relay interprets event threshold with minimal latency (<0.1s).
High-contrast LED beam powers on instantly, casting high-lumen warning symbol at floor level.
Pedestrians and drivers see dynamic visual indicator in their peripheral vision and take caution.
System Hardware
Engineered hardware units matched to specific mounting distances, lux levels, and physical conflict types.
Virtual Safety Marking
Compact LED virtual sign projector series for projected STOP, pedestrian, warning and restricted-area symbols in indoor industrial environments.
Virtual Sign Projectors
Mid-power industrial virtual sign projector for intersections, pedestrian crossings, hazard zones and sensor-triggered warning symbols.
Forklift Safety Lights
Vehicle-mounted LED floor warning light for projecting visible lines or directional boundaries around forklifts and other MHE.
Best for: Explicit safety directives (STOP, Pedestrian symbols, Speed limit).
Best for: Long-distance walkways, vehicle exclusion zones, and dock borders.
Best for: Mobile visual footprint ahead of and behind moving forklifts.
Best for: Intermittent, motion-triggered warnings to avoid sign habituation.
Engineering Process
Optical projection clarity is determined by the interaction of mounting height, ambient illumination, projection diameter, and floor reflectivity. SNT calculates precise focal ratios to guarantee clear visibility.
Select Gobo pattern (STOP, Crosswalk, Warning) and target projection diameter (typically 0.8m - 2.5m).
Measure overhead structure height (3m - 12m) and calculate required lens angle to match required size.
Determine floor illuminance (e.g., 250 lux vs 800 lux skylight) to ensure minimum 3:1 visual contrast on dark concrete.
Select Continuous ON for permanent walkways or Sensor Triggered for dynamic intersections.
The recommended configuration should be based on the actual site conditions rather than projector wattage alone.
LED or Laser
LED is generally preferred when the application requires projected safety symbols, text, arrows, STOP signs, or customized graphics. Laser is more suitable where a narrow, clearly defined line or boundary is required. The final choice depends on the warning format, viewing distance, ambient light, and installation environment.
Power / Output
Required output depends mainly on mounting height, projection distance, ambient light level, required projection size, floor color, and the desired visual contrast. Higher mounting positions, larger projected images, and brighter environments generally require higher effective output.
Lens Selection
Lens selection is determined by mounting height, projection distance, installation angle, and required image size. A fixed lens angle should not be used for every application. Angled installations may also require geometric correction or customized graphic preparation.
GOBO / Projected Graphic
For sign-projection applications, the GOBO can be customized for the required warning content, such as STOP, Forklift Warning, Pedestrian Warning, directional arrows, restricted-area symbols, or customer-specific graphics.
Installation
The mounting position should provide a clear projection path and ensure the warning appears where pedestrians or forklift operators can see it before reaching the conflict point. The installation should consider mounting height, projection angle, pedestrian viewing direction, forklift travel direction, available structure, and environmental conditions.
Trigger & Control
The system can be configured for always-on operation or dynamic triggering through radar, photoelectric sensors, relay signals, PLC I/O, door/gate signals, or other external controls. For forklift-approaching applications, triggered activation is usually more appropriate when the warning is only needed during actual vehicle approach.
Before final selection, SNT should receive site photos or drawings, mounting height, projection distance, ambient light, required warning size, forklift travel direction, pedestrian route, and preferred trigger method. This information is used to determine the appropriate light source, output, lens, GOBO, mounting arrangement, and control configuration.
Technical Evaluation
Provide these critical variables so SNT application engineers can calculate the optical wattage and lens specifications.
Provide the vertical installation height from the proposed projector or warning-light position to the floor.
Provide the approximate distance from the mounting point to the required warning position. Include horizontal offset if the projector will be angled.
Provide an approximate lux measurement if available, or describe the lighting environment and daylight exposure.
Specify whether the application needs a STOP sign, pedestrian symbol, warning line or warning zone, together with the approximate required size.
Provide a simple site sketch or photo showing the direction of forklift travel relative to the conflict point.
Show where pedestrians approach or cross the forklift route.
Confirm whether the warning should be always-on or triggered. If triggered, identify available sensor, relay, PLC or vehicle signal options.
Confirm indoor/outdoor use, dust, moisture, temperature, vibration and cleaning conditions.
Safety Engineering Policy
SNT optical warning systems provide high-visibility visual reinforcement but operate as part of a comprehensive facility safety hierarchy.