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Radar Perimeter: 3 minutes to get up to speed

2022-03-22 Page view : 34 views

What is millimeter wave detection radar?

Millimeter wave (mmWave) is a special class of radar technology that uses short wavelength electromagnetic waves, between centimeter and light waves, with small size, light weight and high spatial resolution, better than visible light waves of smoke, fog, dust penetration ability, all-weather and other characteristics. The electromagnetic wave signal emitted by the radar system is blocked by objects in its transmission path and then reflected, and by capturing the reflected signal, the radar system can determine the distance, speed and angle of the object.

Millimeter wave area security radar systems include transmit (TX), receive (RX), radio frequency (RF) components, and analog components such as clocks, as well as digital components such as analog-to-digital converters (ADCs), microcontrollers (MCUs), and digital signal processors (DSPs).

Security radar work through the signal generator local oscillation to generate modulated signal, and then by the transmitter directional emission modulated signal, this modulated signal through the environment of different objects (including the ground, buildings, vehicles, people and other detection area of all obstacles) reflection, by the radar receiver to capture the echo signal, and between the radar transmitter and receiver to build an all-round three-dimensional detection area; through the echo signal Through the mixing, filtering and elimination of the echo signal, the noise signal such as ground clutter is eliminated and the change signal caused by the real target in the environment is filtered out, and the early warning or alarm signal is resolved and output.

 

Figure 6 Millimeter wave area detection security radar

Millimeter wave radar has been developed since the 1940s, and millimeter wave radar for airport traffic control and marine navigation emerged in the 1950s, showing superiority in high resolution, high accuracy, small antenna aperture, etc. After decades of development and technological innovation, it has become a very mature and advanced detection system in technology, technique and application. According to the ISM (Industrial Scientific Medical) Band defined by ITU-R (ITU Radiocommunication Sector), the 24GHz band is the common ISM band for all countries, which belongs to Free License, no license is required, and can be It is widely used in industrial, scientific, medical and other fields.

Millimeter wave security radar as a new and innovative technology, compared to traditional security systems with strong anti-interference ability, high sensitivity, environmental adaptability, detection distance, low comprehensive cost and other advantages, can be widely used in military defense detection, prison area / perimeter prevention, petrochemical area monitoring, airport area security, electricity, aviation and other high-grade security requirements of a variety of industries. This foreign start earlier, there are many types of products, well-known foreign brands such as the United States Spotter RF, Germany’s innosent, etc., the domestic brand Nare Technology NSR200/NSR100W/NSR300W; Nare Technology radar video integrated machine in the domestic judiciary, prisons, petrochemicals, airports and other fields have practical applications, to provide reliable security industry The Nanoradar Technology NSR200/NSR100W/NSR300W are domestic brands.

Comparison of multiple detection technology regimes

Table 1     Comparison of multiple security technologies

Video Surveill

ance

infrared ray induction coil Leakage cables Microwav e-to-sho

ot

Securit y Radar
Installati on and Configurat

ion

 

 

involved

simple and convenien

t

 

 

involved

 

 

involved

simple and convenien

t

simple and convenie

nt

Light environmen

t

 

daytime

 

Day/Night

 

Day/Night

 

Day/Night

 

Day/Night

Day/Nigh t
 

Coverage area

 

Wide area long distance

 

Wide area short distance

Narrow area short distance Narrow area short distance  

Moderate distance in narrow areas

 

Wide area long distance

 

 

Target informatio n

 

 

Identific ation detection target

 

 

 

Detection target

 

 

 

Detection target

 

 

 

Detection target

 

 

Detection of target distance accuracy

Detectio n target speed distance accuracy target classifi

cation

 

 

 

False alarm factors

 

 

Insect Shadows Severe Weather

 

 

 

insect leaf

 

 

 

 

not

Soil moisture magnetic fields interfere with metal

objects

 

 

small animal, grass  and trees

 

 

Reflecti on of severely swaying objects

Range filtering not not not not not have
 

cost

reasonabl e lower (one’s

head)

Low maintenanc

e high cost

 

loud

reasonabl e reasonab le

From a variety of security technology means can be found, whether from the ease of installation, environmental adaptability, target detection capabilities, intelligent applications, technological advances, costs and other aspects of comparison, security radar have comprehensive advantages.

Nanoradar Technology: NSR200, maximum traverse 250 meters (human target), horizontal narrow angle 20 °, designed for perimeter; designed with 24GHz band, no authorization required, supports more than 5 kinds of alarm interfaces, can output accurate information such as distance, angle and speed of the target at the same time, convenient for quick linkage of optoelectronic devices such as dome machines, AI algorithm can effectively reduce false alarms, support protection alarm definition. You can flexibly define the alarm area, warning area, shielding area,

IP66 design, can meet the perimeter all-day, all-weather use. Key features.

  • (a) Pedestrian target crossing detection up to 250 m, with a horizontal detection angle of 20°.
  • Support for radar web, allowing direct access and management of radar and setting of alarm
  • Rich physical interfaces Ethernet, RS485, Relay_out*2, IO_out*2, IO_in, LEDs, field driveable audible and visual
  • Support for radar communication protocols, SDKs, web APIs and other protocols and development packages for flexible
  • Active radar search for target information, support for guided camera screen positioning and continuous target tracking, which can significantly reduce the pressure of manual
  • Meet 7x24h real time protection, adapt to all kinds of bad weather such as rain, snow, haze, sand, dust and smoke.