What is the Speed Feedback Sign (DFS)
When the vehicle enters the detection area of the "Speed Feedback Sign (DFS)" radar (approximately within a range of 10m to 300m in front of the sign), the microwave radar will automatically detect the speed of the vehicle and display it on the LED display screen to remind the driver to reduce the driving speed in a timely manner, effectively reducing the occurrence of road traffic accidents caused by speeding.
Technical parameters of Traffic Sign Speed (DFS) products
1. Display method: It can be composed of 2-digit or 3-digit 7-field digital characters (such as 88, 188, 888)
2. Power supply method: 90-240V mains power can be used, or solar cells can be used for power supply.
3. Working electrical parameters: Working voltage: 12V; Working current:<1.5A; Maximum detection speed: 255 kilometers per hour
4. Prompt speed limit display mode: 5 customizable speeds, with 9 built-in speeds at the factory. The safe speed is displayed as a green number, and the red number is displayed when exceeding the speed limit.
5. Scope of application: Urban expressways, highways, suburban connecting lines, government agencies, colleges, and other road sections with speed restrictions.
6. Suitable for 2-3 lanes simultaneously.
Radar technical parameters
◆ Power supply voltage:+7.5 to+8.5 DC voltage
◆ Power supply current: maximum 0.75 amperes
Reverse pole protection: inline diode protection
◆ Electronic components: solid-state integrated circuits, transistors, and other accessories
Relative temperature: -40 to 60 degrees Celsius; Relative humidity at:+95% (non condensing state)
Internal accuracy: ± 0.1km/h
External accuracy: ± 0.1km/h
◆ External accuracy verification: Frequency regulator (K-frequency)
◆ Internal detection: 96KM/H analog Doppler signal detection internal integrated circuit, and display of light-emitting diodes
◆ Display: Three digit integer, LED display, power on status, RF interference and low voltage
◆ Locked tracking time: synchronous tracking, no error input
◆ Antenna type: conical antenna
◆ Lens type: Precise ground reflection
◆ Polarity: Positive pole cycling
◆ Beam width: 8 degrees standard 3x telephoto
◆ Receiving type: downward Schottky scattering emission, blocking hybrid light-emitting diode
◆ Microwave signal: capacitive diode
◆ Radar frequency: X-band (10.150G)
Detectable distance: ≤ 0~1066m
Response time: ≤ 5ms
◆ Leakage energy value: ≤ 3 μ W/cm2
Three digit display, ultra fast response within the speed range of 16~388KPH. Absolute safety and legality. Electromagnetic wave radiation is lower than national regulations and less than the electromagnetic radiation of microwave ovens. The only requirement for obtaining the correct reading is that the target's direction of movement points directly towards the radar speedometer. Meet various testing environments, can handle different weather conditions, and can measure speed normally in the car on rainy and foggy days.
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