What is an electronic eye - Solutions - Huaqiang Electronic Network

Test probe P100-M3

Photocoupler

The so-called "electronic eye" is the electronic speed measuring system, also known as the digital fast phase radar system, which detects the speed of the vehicle through the radar system and captures the speeding vehicle forensics with a digital camera. It is an electronic illegal evidence collection system that has been heavily invested by local governments in China, and has been widely used as the basis for traffic violations.

"Electronic eye" means "electronic police". As a newly used traffic law enforcement equipment, its status and role should be a kind of supervision equipment for traffic administrative law enforcement. The most important thing is its as a forensic equipment for administrative punishment of traffic violations. The traffic police is penalized for the traffic violations discovered by the "electronic eye" based on the electronic image data formed by the traffic police. The presence of electronic eyes is often not known to traffic drivers. In addition to the hidden installation at the intersection, our traffic police are also setting up mobile “electronic eyes” on the road to covert law enforcement.

At present, hundreds of thousands of traffic tickets are indeed a headache for most drivers, and most of them want to know what is behind the three words "electronic eyes." We will not discuss whether the road speed limit is unreasonable or the speedometer has an error with the actual speed. Just say the three words "electronic eye" to understand the radar speed.

Most friends who are interested in technology know that radar can detect the orientation and speed of metal objects. In fact, radar speed measurement uses the Doppler principle in physics. When there is relative position motion between the target and the radar, the frequency of the target echo changes. The amount of change in frequency is called Doppler shift. After signal processing, the relative radial velocity of the target can be determined.

So what is the concept of the band that is often said in the market?

In fact, the K, Ku, Ka, and X are the radar wave bands used by the speed radar, and are also defined by the radio wave frequency. A frequency comparison table is attached below:

X-band: 10.500-10.550GHz 9.850-9.950GHz

K-band: 24.050-24.250 GHz

Ka band: 33.400-36.000GHz

Ku band: 13.450-13.500 GHz

As for the L-band, which is often referred to, (laser speed measurement), it is actually a set of infrared rays of 800-1100 nm wavelength.

The above-mentioned frequency bands are the “quasi-industry standards” for radar speed measurement products. Generally, radars used for traffic speed measurement usually use radio waves in the above frequency bands to work.

For the public, this is not a secret, but when some merchants selling radar detectors on the market talk about these words such as "band", "frequency", "wavelength" and "laser", they always put pressure on the tone. Low, it seems very mysterious, as if to introduce you to illegal products, but in fact, they do not even know what these "high-tech" words mean.

Understand the above principles, we can look at the radar detector again.

Radar detectors are designed to detect radar waves in the above bands. As soon as the corresponding radar wave signal is detected, the radar detector will use sound and light to prompt.

However, not every radar detector can detect all of the above bands. This is also the trick of the same kind of products on the market, the dealers took products that are not suitable for China, and they are eager to make profits.

The author will introduce the relevant knowledge about radar detectors from the front, and hope to make progress together with everyone.

Many people misunderstand that radar detectors are illegal. In fact, radar detectors are only instruments that detect radar waves and prompt them. They do not interfere with the normal operation of any speed measuring system. Its main function is to prompt the driver - the front is Speed ​​measurement area, please control the speed.

What is really illegal is another kind of radar wave jamming device - "counter speedometer". The counter-speedometer can detect the signal band used by the police's speed measuring device and actively transmit the interference signal, which causes the speed-measuring radar to not work properly.

Many people, even the police, can't distinguish the difference between the two devices, and always feel that it is illegal to try to know where the speedometer is, so the concept of the radar detector and the "anti-speedometer" is confused.

It is very important to fundamentally distinguish between the above two types of equipment. The radar detector only provides the sound and light reminder to the owner - the front is the speed measurement area, please control your vehicle speed; the "anti-speedometer" directly launches the radar. The wave interference signal causes the speedometer to be inoperable.

From the working principle of the radar detector, it may indeed "instruct" the position of the radar department to install the radar speed measuring equipment, or even the band used by an instrument, but in reality, the traffic department sets the position of the speed limit detection. It is the position that should require the driver to control the speed of the vehicle, and the law enforcement department should "openly enforce the law", then the radar detector is actually helping to remind the driver to control the speed.

After understanding the concepts of "electronic eye" and "radar detector", we still don't forget that safe driving is fundamental. All the electronic equipment can do is to remind you not to overspeed, and the throttle is still at your own feet.

Bionic electronic eye: A new study shows that a bionic electronic eye is expected to be born in the near future. Because the researchers have uncovered how the eyes see the images "translated" by the brain. The role of the bionic electronic eye is to use computer integrated circuits to recover such images.

Researchers at the University of California found that the human eye has about 10-12 output "channels", each of which sends information to the brain and then forms an image. The human retina presents a set of images that are formed as a result of communication between layers of cells in the retina. They have invented a computer microchip called "Cellular Neural Network" that can be used for image processing like retinal function, which is the basic principle of the invention of the bionic electronic eye.

Researchers are starting to improve computer microchips from a biological perspective, making it more and more like a mammalian retina. But to make the bionic electronic eye truly replace the human eye, scientists must also liberate the mystery of how to connect computer micro-integrated circuits with complex human brain circulatory systems.

Electronic dog: "Electronic dog" is called a speed radar alarm. It is a radar warning device installed on a car. The radar speedometer transmits and receives the frequency ratio of the reflected pulse wave, analyzes the difference by computer, and converts the speed of the car. The speed radar alarm is a pulse wave that receives the radar wave to measure the speed of the car, and then issues a warning. The monitoring distance of "electronic dogs" currently on the market ranges from a few hundred meters to a kilometer. “It’s like putting an 'ear' that can hear the microwave. When the 'ear' hears the sound of the radar speedometer, it reminds the driver to slow down or not to red light.” However, some “electronic dogs” also take special electronic The means interferes with the operation of the "point of the eye" to achieve the purpose of evading monitoring. There are also "electronic dogs" that use the gps system to issue warning signals through established and known "point-eye" databases.

The "electronic dog" is actually a simple radio transmitter. The "electronic dog" works at a frequency between 398 and 400 MHz. It is the state's fixed, mobile, satellite and radio navigation services. Electronic dogs are the act of stealing national radio frequency resources and bear corresponding legal responsibilities.