แสดงบทความที่มีป้ายกำกับ speed แสดงบทความทั้งหมด
แสดงบทความที่มีป้ายกำกับ speed แสดงบทความทั้งหมด

วันอังคารที่ 11 มีนาคม พ.ศ. 2551

Beating Photo Radars

By: Nahshon Roberts

A photo radar is designed to photograph drivers who travel five to ten miles per hour over the speed limit. These photographs, along with particulars such as date, time, location, and vehicle speed, are then mailed to offenders.

Anatomy of Photo Radars
How does photo radar work? Photo radar is made up of the following:

● a high speed traffic camera and flash unit
● a narrow beam, low-powered Doppler radar antenna aimed across the road
● a computer that records information, such as date, time, speed, and location of the violation

Photo radar works this way. First, the system is hoisted onto a police vehicle that typically patrols areas where overspeeding is a problem. Then, it catches speed demons and those who run against red lights. Drivers can see their vehicles' speed from a reader board found in the back window of the police unit display.

Beating Photo Radars
Many disgruntled drivers have successfully parlayed their dislike for photo radars into a lucrative business. They produce products that supposedly protect drivers from being photographed by photo radars. Below are some of the products and a brief description of how they are used.

● Radar Detectors
A radar detector detects the presence of photo enforcement devices. Accordingly, it assists drivers in beating photo radars by warning them of photo radar presence. This gives drivers time to slow down. Many claim radar detectors are effective. One problem with radar detectors, however, is that these do not work with red light cameras that measure speed using sensors embedded in roadways.

● Flash-back device
What senses the flash of a photo enforcement camera and immediately flashes its own strobe light onto the license plate to make license numbers invisible to cameras? Why, a flash-back device, of course! Flash-back devices are highly popular, especially because they're cheap. A study, shows however, that flash-back devices are ineffective in beating photo radars when Redflex sensor-based photo enforcement cameras are used.

● GPS-based warning systems
Radar detectors are illegal, and in some states, use of flash-back devices are implicitly prohibited. What do drivers interested in beating photo radars without breaking the law do? They buy GPS-based warning systems. These devices, which are very popular in European markets, has just recently become available in the United States.

This is how a GPS-based warning system works: you download the location of speed enforcement cameras into a GPS system. Because your system now has a map of camera locations, it warns you to slow down every time you are close to a photo radar.

While a GPS-based technology may seem infallible, it is not without its faults. To be effective, it relies on your knowledge of photo radars' locations. This is knowledge you may not always have. All it takes for you to get a citation is one speed camera unregistered in your GPS system.

● Plate covers
Plate covers are cheaper alternatives to the three technologies I have previously discussed. These covers go over your license plate, keeping it visible to anyone who is directly behind your car. In certain angles, however, a portion of your license plate cannot be seen. Some states, particularly Washington, D.C, penalize the use of these covers by as much as $300. Other states are silent regarding their use. Should you ever decide to go for plate covers, note that they do not work with motion video cameras.

● Photo spray
This is the least effective method for beating photo radars. It is sprayed onto license plates. Its high gloss finish is said to reflect the light flashed by cameras, resulting in overexposure of photos. Experts warn that photo sprays are only 45% reliable in reflecting camera light. Furthermore, though photos are overexposed, a quick scrutiny of their negatives will yield the exact sequence of a license plate's numbers and letters.

Beating photo radars requires cunning and the proper tools. When caught, you would be held legally accountable. You must, therefore, carefully consider what technology to use and whether you are ready for repercussions. Then, and only then, should you use any of the above-mentioned technologies.

Article Source: www.iSnare.com
Permanent Link: http://www.isnare.com/?aid=147199&ca=Computers+and+Technology

วันอาทิตย์ที่ 9 มีนาคม พ.ศ. 2551

GPS Vehicle Tracking - Benefits And Usage

By: Tim Chirillo

If you are concerned about how fast your teen is driving, or if your spouse is being unfaithful, a gps vehicle tracking device can assist you in keeping tabs on them.

A gps vehicle tracker is a usually a small device that you can attach to the bottom of the vehicle by a magnet, or you could secretly stash it inside the car somewhere.They come with a software program, where you can login from your favorite web browser and keep a real time track on exactly where the vehicle is.

Here are some of the really cool features.
Monitor the vehicles speed. If you are worried about your precious automobile being abused, you can set the gps vehicle tracking device to a certain speed you designate. If the car exceeds this speed limit, you will be notified immediately. So if your child swears they aren't speeding, you will have the proof!

Keep track of your vehicle's whereabouts. From your computer you can track in real time exactly where your car is . Did your wife tell you she was going to the gym? Then why is her vehicle miles away from the establishment? You will be able to tell. What about your teen? Did she go to the library or is she over that guy's house that you absolutely cannot stand?

Alerts when out of the designated area. As well as speeding alerts, you can set on your computer, remotely a certain area of where you believe the vehicle should be. For instance, you can input an address and a certain radius within that address. So, if your vehicle goes out of that radius, you will be alerted as well.

Since the gps vehicle tracking device is browser based to track activity, you can access your vehicle 24/7 from any computer, even while your at work. You will simply go to a web page, enter your login info,and bam, there are the stats are your car.

Some of the better devices even store up to 90 days of activity. So, you can see exactly how many times the driver went over your designated speed limit, or how many times they stopped at a certain address which you are suspicious of.

These gps vehicle tracking devices are a cool gadget, and a tech lover's dream. You can now have all the information on your vehicle at your fingertips!

Article Source: www.iSnare.com
Permanent Link: http://www.isnare.com/?aid=147310&ca=Computers+and+Technology