Understand the working principle of the speed test screen in three steps

We must first understand how those shining guys on the road do their work.​​The core components are actually the golden combination of radar + LED screen​​, the radar is like a hunter's eyes, staring at the speed of the vehicle 24 hours a day, and the LED screen is the real-time signal of the speaker. Here is a cold knowledge: the radar waves of high-end equipment can penetrate heavy rains, and the accuracy error does not exceed ±1km/h. Compared with the error of ±3km/h of ordinary equipment, the gap is so big!

The design mystery of the radar hiding place

​​Top3 common installation locations​：

1. ​​The top of the column​​: The most popular 6-8 meters above the ground, with a wide view and a way to prevent naughty children from making trouble
2. ​​Side of the screen​​: Inline design, no longer afraid of radar "cold" on rainy days
3. ​​Independent bracket​: Suitable for curve monitoring, with an adjustable angle range of ±30 degrees

To give a real case: a city's viaduct was equipped with a bracket with inclination compensation, and the capture rate directly soared by 58%. But be careful,​The installation angle deviation exceeds 5 degrees, and the monitoring accuracy will immediately drop by 20%​​, the money was spent in vain!

Three golden rules for site selection

​Lighting conditions​：

• Front-light installation: The screen brightness automatically drops to 1500cd/m² (35% power saving)
• Backlight situation: The intelligent fill light system is automatically turned on, and it is not dazzling if you can see clearly

​Road Features​：
▸ Downhill section: Installed at the top of the slope 50 meters forward (pre-warning is very useful)
▸ Bend position: Install dual radar on the outside of the arc (eliminate blind spots)
▸ School area: Best 15-20 meters away from the zebra crossing (give drivers reaction time)

​​Convenience of maintenance​：
① Leave a 1.5-meter maintenance passage (don't let the guardrail block the engineer's path)
② The power box must be protected from ants (there have been equipment built by ants and short circuits)
③ The network cable interface faces downwards (rain water cannot flow along the line)

Five pitfalls that novices are most likely to step on

1. ​​Tree obstruction​: I think the location is good in spring, but the leaves fall off in autumn will reveal privacy (the rate of missed shooting in a certain city has soared)
2. ​​Geomagnetic interference​: Within 30 meters from the high-voltage line, the radar will report numbers like a storm
3. ​​Insufficient heat dissipation​​: Have you ever seen someone installing an air conditioner next to the external unit? High temperatures cut the screen life directly
4. ​Cut corners​: It is really embarrassing that the screen and pole are blown away on typhoon days
5. ​​Ignore the upgrade​: Will the map data not be updated for three years? It may be still testing the speed limit that does not exist at all

Hidden skills for daily maintenance

​​Cleaning Periodic Table​​：

​Emergency handling​：

• Snowflakes on the screen: 80% of them are oxidized by the network cable connector (using an eraser can help you)
• Data jumps: Restart works better than anything else (don't laugh, 90% of the faults can be better)
• Black screen strike: Check if the power box is bitten by a mouse (real news!)

Now many places have begun to use intelligent radars with AI algorithms, which can not only measure speed, but also identify models and automatically adjust monitoring parameters. After installing this kind of equipment in a county town, the number of speeding violations dropped by 40%, which is better than checking jobs every day. Finally, I would like to remind everyone: Don’t make trouble by buying equipment online. This thing must be used in conjunction with the traffic management system. If you install it privately, you may get a ticket. If you really want to upgrade your equipment, remember to find a professional team with more than ten years of experience. After all, it is related to road safety and it is not careless!

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