Hogyan változtak a radardetektorok az évek során?
Ha hozzánk hasonlóan Ön is régóta autórajongó, akkor biztosan emlékszik a magazinra a szélvédőre szerelhető Escort radardetektorok hirdetései az 1980-as években. Viszonylagosan gigantikusak voltak. Az előlapon volt egy nagy analóg jelerősségmérő, és az a mindenütt jelen lévő narancssárga izzólámpa a jobb oldalon. Csak két beállítás volt:a hangerőszabályzó és a város vs. autópálya választókapcsoló. De bizonyára elvégezték a munkájukat – elvégre Autó és sofőr , Autoweek , és több felnőtt magazin is ragyogó kritikát adott róluk! Mi ez az adott nemre irányuló marketingnek?
A radardetektor-ipar Észak-Amerikában hatalmas. Évente számtalan radardetektort vásárolnak, és több millió dolláros potenciális gyorshajtási jegyet elkerülnek. A radardetektor-ipar hosszú utat tett meg, és tovább fog fejlődni. Ez a cikk rövid áttekintést nyújt arról, hogy honnan jött az iparág és hová tart.
Rendőrségi radar fegyvertörténete
Kutatásunk szerint az első radar alapú autós sebességmérő rendszereket a ’40-es évek végén állították használatba. Ezek a hatalmas rendszerek vákuumcsöveket és szalagdiagramokat használtak az információk naplózására.
A Connecticut állam rendőrsége vezette a vádat a radaros sebességmérés alkalmazására. Néhány éves tesztelés után 1949 februárjában megkezdték a radarmérések alapján sebességjegyek kibocsátását. A New York állambeli Garden City lépést tartott a glastonburyi rendőrséggel a gyorshajtók elfogásának és a jegyek kibocsátásának hatékonyabb módjait keresve. bevételi forrás.
A korai radarrendszerek az S-sávban 2,455 GHz-en működtek. Sajnos ezek a korai rendszerek csak néhány mérföld per órán belül voltak pontosak, és ami még rosszabb, hatótávolságuk 150-500 láb volt.
Radardetektorok története
Az első radardetektorral kapcsolatban különböző állítások vannak. Az egyik egység, a Radar Sentry, amelyet a New York állambeli Tonawandában építettek, az egyik első kereskedelmi forgalomba kerülő egység volt. A Radar Sentry 1961-ben jelent meg a piacon, és alig 40 dollárért kelt el. Egy pár AA elem hajtotta, és az utasítások azt sugallták, hogy a jármű napellenzőjére csíptetve beszerelési helyként jól működött.
Another early detector, and one that some articles have (perhaps mistakenly) credited as the first, was the Fuzzbuster. Dale Smith, an electronics wizard, decided to design a radar detector after getting a speeding ticket. He felt the ticket was unjust, so he set out to design a device that would detect when the police were using Doppler radar guns to measure vehicle speed. The result was that Smith invented the Fuzzbuster. If you thought two controls on the Escort was fancy, then the Fuzzbuster was the meat and potatoes:A squelch control and a warning light were all you saw. Semmi több. Watch out, Smokey! We can see you!
An Unfair Advantage
As the popularity of radar detectors grew, it is no doubt that police forces across the nation became frustrated that their enforcement tools had become less and less effective. Around the year 2000, two products entered the market to crack down on radar detector use in states and provinces where it was banned:the Spectre and the VG-2 Radar Detector. These products were designed to pick up the leaked radio frequency radiation from radar detectors and alert police. When combined with bans on radar detectors in some states and Canadian provinces, the police had the edge again – for a while.
The logical evolution for manufacturers was to create a new generation of radar detectors that were impervious to detection by the VG-2 or Spectre systems. It wasn’t long before all the name-brand radar detectors became undetectable. The marketing teams had a field day with their new features, and the sales of radar detectors took off again.
Ones and Zeros
At some point, the evolution of radar detectors took a leap into the digital age with the introduction of microcontrollers. These small computers replaced resistors, logic gates, transistors and more to reduce the size of radar detectors. The software running on these miniature computers brought us elaborate displays and a vast increase in system configuration and optimization options.
The real step forward came with the ability to update the software in the radar detector. Combined with performance improvements, software updates could resolve glitches that otherwise required hardware replacement. With updates to our phones and computers seemingly coming out of thin air, credit must be given to the serial ports and USB ports found on recent radar detectors. Yes, updates are a hassle, but without updates, functionality can suffer.
Advanced Signal Processing and Filtering
Another milestone in radar detector performance was the implementation of digital signal processing (DSP). All-digital radar detectors convert the received high-frequency information into the digital domain for analysis and processing. Unlike analog processing, variations in temperate have no effect on DSP technology. Digital processing also offers more precise signal filtering, resulting in fewer false alarms and increased sensitivity. The result of implementing DSP technology was to provide warnings earlier than analog systems, with fewer false alarms.
GPS Locating
The first radar detectors were quite simple. All they had to do was detect the presence of a radar signal. If a signal of any kind were present, the alarm would go off. Door openers at the grocery store and variety store, along with ultrasonic alarms at the local bank, set them off equally successfully. The challenge for radar detector manufacturers became to provide as much warning as possible while reducing the number of false alarms.
Sensitivity adjustments and improved signal filtering helped reduce the false alarms, but the biggest benefit came only recently. Many modern radar detectors, both windshield-mount and custom-installed types, include an on-board computer, GPS receiver and database of known false-alarm locations. As you approach the local bank, the radar detector will ignore the signal from the alarm system or automatic door opener. If you are in a location where a new false alarm pops up, you can add that location to your database.
Internet-connected Technology
With the incredible popularity of smartphones came the opportunity to integrate radar detectors with Internet connectivity. With a cloud-based database, your radar detector system can be updated in real time to the presence of a speed trap or a false alarm. Your phone is paired to the radar detector using a Bluetooth connection, so there is no need for any wires. Once your detector is on and you launch the app, the system will search its database for your location and report any known speed traps, red light cameras or false alarm sources in the area. If another user recently detected a speed trap, the map on your phone will alert you, long before you are in the range of the radar gun. Likewise, if you detect a police officer using a radar gun, anyone else in the area will receive that warning.
False Alarm Prevention
Modern vehicles include a wide variety of onboard warning systems. Adaptive cruise control, lane departure warning, blind spot monitoring and emergency brake assist systems are increasingly common. These safety systems often use radar systems to measure distances or identify the presence of another vehicle or object. These radar systems can cause false alarms on radar detectors.
In the past, radar detectors only looked for the presence of a radar signal within the X, K or Ka bands. They didn’t care what information was within the signal; just that it was present. Now, different automobile radar systems have signatures. Thanks to extremely fast signal analysis, radar detectors can decide if the signal it is detecting is from a Mercedes, an Audi or the coppers!
What Does the Future Hold for Law Enforcement?
Advanced image processing technology may soon eliminate the need for police to send radar or laser signals at all. Modern camera systems could discern your rate of speed simply by analyzing a video stream in real time. Your speed could be calculated based on the rate of change of the size of your vehicle relative to the objects around it.
Many police departments already own and operate remotely controlled drones. Would it be possible to equip a drone with a radar gun or lidar system? Teljesen! Perhaps their onboard camera system could be integrated into the aforementioned video analysis systems?
Companies have talked about technologies that would allow them to detect whether you are sending text messages from your smartphone. While this seemed like a great innovation a few years ago, the proliferation of voice recognition technology and the wide acceptance of Apple CarPlay and Android Auto squashed this need before the technology was perfected.
As more and more cars are connected to the Internet in real time, it could be possible for law enforcement agencies to communicate directly with your vehicle. This opens up a big can of worms regarding personal privacy. There is no doubt that the police will do everything they can find an excuse for to access the information.
Stay in Touch With Technology
Your local mobile electronics specialist retailer spends a great deal of time training on the latest radar detector technologies. When you decide you want protection from police radar guns, drop in and talk to them. They can suggest a solution that will meet your needs and explain how to get the most out of it.
(header image Fuzzbuster II By dave_z28ca (http://flickr.com/photos/21612624@N00/167903357/) [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons)