![]() ![]() The outside of the enamel band shades the adhesive from the Sun and protects it from ultraviolet radiation. When car manufacturers install the windshield, they bond the windshield to the vehicle with adhesive placed on the etched part of the black enamel glass area (inside surface). The band has an etched surface to enable adhesive to bond to the glass, says a sales manager at Able Auto Glass. This black band includes a border of dots. I go thru with my older car that has long been registered: bang, a fine.Windshield glass contains a black enamel band (called the frit) around the periphery that is baked into the glass. With the new car that had no EZ PASS, but which then had a registed tag and no EZ PASS after I called, I blew the toll at least five times w/ just being charged the 3 bucks. I cannot figure out what the heck their procedure is. So then I get a snapshot of my plate/car and notice of the fine, unless I disputed it. Then, two months later, with a registered car I remembered the EZ PASS, but forgot to hold it up. I was concerned I’d get a bill and fine, but sure enough, even when I forgot to swap, they billed me for just the toll. They took the plate number, and said that if I went thru a toll with the new car now and didn’t have the tag they’d read the plate and bill me. I told them I take one of the older two tags from and use it in my new third car. After a while, I even called and expressed concern that this does not match their requirement of one EZ pass tag per registered vehicle/plate. I have two EZ pass tags registered to three vehicles. Tiny, ‘invisible’ wires block the signal in such windshields. Anyone can get one, but most who do have one own cars with the defroster built in to the front windshield (popular on some Ford products and at least one GM van I know off). ![]() It detects the incoming signal from the tag reader and sends back a coded number which is unique to the tag. The teeny bit in the middle is the microchip which does all the work. The spiral on the outside is the antenna. They want each person to have a unique tag.īy the way, in case you were curious about what’s inside that little tag, here’s a pic of one: It also stops you from passing the tag from person to person, which they don’t want you to do. Mounting the tag insures that it’s oriented correctly. The tag is directional too, so if it’s not hanging in the correct orientation (or you don’t point it the right way when you wave it) you’ll decrease the signal even further, giving you more of a chance that the signal won’t be strong enough for the reader to understand it. If you have the tag down in the corner of the window, not only do you risk having part of the metal frame of the car blocking the signal, but you’ve also got less signal to work with down there since you aren’t near the center of the beam. On the above antenna, if you are within about 15 degrees to either side of this, no real problem, but any further off to the side than this and the signal level is going to drop quite a bit. The “0” on the antenna is aimed to where the center of most car’s windows will line up when the car goes through the lane. A monster truck is going to have its tag a lot higher than a low riding sports car, and a very thin car could be closer to one side of the road than a big old fat car.Ī typical antenna pattern might look like this: For a toll booth, you want the angle to be wide enough that you can read a wide variety of cars and trucks, but narrow enough that you don’t have to worry about picking up a tag in another lane. Others have a wider pattern, so they work at a greater angle but a shorter range. They have a longer range, but if you get too far from the center of the radio beam they don’t work very well. Some antennas focus the energy in a single direction. The exact pattern depends on the type of antenna. Being a EE who has used RF tags in control systems works too.Īntennas broadcast and receive in a pattern. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |