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    當(dāng)車(chē)輛進(jìn)入雷達(dá)檢測(cè)區(qū)域時(shí)（大約為雷達(dá)測(cè)速屏前部600m的范圍內(nèi)），微波雷達(dá)將自動(dòng)探測(cè)車(chē)輛行駛的速度，并在LED顯示屏上予以顯示及時(shí)提醒駕駛員注意降低行駛速度，從而有效減少因超速引發(fā)道路交通事故的發(fā)生。

    雷達(dá)測(cè)速屏具有顯著的醒目誘導(dǎo)功能，可以明顯減少交通事故，達(dá)到安全的效果。

• 雷達(dá)頻率:k波段（24.150G）
• 可探測(cè)距離:≤0~1066m
• 響應(yīng)時(shí)間:≤5ms

Introduction to radar speed sign/driver feedback sign(DFS):

 
DFS is one of our independent research and development for reducing drivers’ speed and improving road safety. We have made the product since 2006 and occupied most of the Chinese market share. Our DFS can be powered by solar or AC.
DFS can be used for the following locations:
1/residential/neighbourhood
2/car park/stereoscopic parking lot
3/expressway
4/general highway
5/factory/plant area
6/construction sites
7/mine or railway transport area
8/accident-prone area (such as bend;tunnel;bridge)
9/school area
10/hospital
Anywhere for enhancing public safety.

Technical parameters:
Components: LED panels; controller; radar device; display case; solar panel; battery; cable
Font:
Height: 35 cm
Color: red or yellow
Two-color: green for safe speed; red for speeding
Quantity: 2 characters or 3 character
Screen size: 70*40 cm
Display case size: 80CM *55CM width *7CM depth
PCB (triple digits) size: 69*38 cm
LED：
Brightness: Red: 5000-7000mcd; yellow 6000-8000mcd; green 10000-12000mcd
Perspective: Red: 30 degree; yellow: 30 degree; Green: 45 degrees
Radar: k-band directional Doppler radar
Monitoring range: 4 lanes
Speed measurement range: 5---321 km/h
Tolerance: 1-2 per km/h
Transmit mode: RS232 interface series
Response time: less than 5ms
Communication protocol (between the controller and the display panels): I2C Protocol
Power input: 90-240V AC
Operating voltage: 12V DC
Current consumption: Max 10W; standby: 0.2W;
Battery: 12V/65AH; 21 kg
Gross weight: solar 40 kg; AC: 20 kg
Solar Panel: 12V 40W; 12V 80W
Reflective sheetings: high intensity grade
Operating temperature:-40 ° c---70 ° c °
Added functions if you need: DFS with saving function; software used to deal with the saved data for accumulation
Guarantee period: 2 years
The certificate of inspection, warranty card, installation manual are provided when finished.
Manufacturer: Hangzhou Lailai technology limited
Certified by CE/FCC/ROHS