At present, personnel monitoring has the ability to understand the number of target personnel, orientation, sports, health... Potential has become an important area of exploration. Among them, the accuracy of personnel monitoring equipment and environmental adaptability play a key role. Although the current application of sensor technologies such as optical cameras, passive infrared (PIR), and active infrared (lidar, ToF) is relatively common, it is still limited in terms of accuracy, false detection rate, environmental adaptability (such as lighting, brightness, smoke and object occlusion, etc.) and privacy protection.
Millimeter-wave personnel monitoring radar accurately measures target distances, velocities, and angles, and distinguishes between human and non-human objects; has no restrictions on environmental conditions such as rain, dust, or smoke; can work continuously and uninterruptedly on completely dark nights or bright days; and has unique advantages in protecting the privacy of target personnel and installing privacy. Compared with infrared and laser equipment, it has the propagation characteristics and environmental adaptability of penetrating smoke, dust, rain, fog and snow; compared with cameras and other optical technology equipment, it has better privacy protection and installation concealment, which to a certain extent makes up for the shortcomings of these application technologies. The application principle and advantages of millimeter wave personnel monitoring radar WTR-810 in target personnel counting and tracking are described in detail below.
<h1 class="pgc-h-arrow-right" data-track="5" > people counting and trajectory tracking</h1>
Personnel counting and trajectory tracking are indispensable data for people flow statistics and regional security in many existing scenarios, such as airports, shopping malls, chain stores, stations, museums, conference rooms, etc. Millimeter wave personnel monitoring radar WTR-810, through the calculation and analysis of the electromagnetic waves reflected by the moving target personnel in the monitoring area, obtain the current speed, position and direction of the target personnel, and achieve trajectory tracking while outputting the speed, position and direction of the target personnel. In addition, through the analysis of the position of the target personnel, it is also possible to determine whether the target personnel have entered the set monitoring area, and count and output the number of targets monitored in each area.
Screenshot of a demonstration of the personnel monitoring radar WTR-810 for personnel trajectory tracking
Screenshot of the monitoring effect of the personnel monitoring radar WTR-810 for personnel counting
Target Counting and Tracking Steps:
Step 1: Draw the setting monitoring area and the counting trip line;
Step 2: The radar emits an electromagnetic wave signal to the monitoring area, and then receives the reflected signal;
Step 3: Count the number of targets entering and exiting the monitoring area and passing through the counting trip line;
Step 4: Obtain position information and track the trajectory of the moving targets reflecting the electromagnetic wave signal in the monitoring area;
Step 5: Constantly refresh the number of targets and trajectory information in the monitoring area.
< h1 class="pgc-h-arrow-right" data-track="60" > personnel monitoring radar application advantages</h1>
Based on the characteristics of millimeter-wave radar narrow beam, wide frequency band and high emission frequency, personnel monitoring radar has the advantages of high resolution, strong anti-jamming ability, target feature extraction and classification recognition, good concealment, small size, and light weight.
1. Narrow beam
The narrow beam of millimeter-wave radar has high tracking and guidance accuracy; it is easy to track at low elevation angle, anti-ground multipath and clutter interference; it has high lateral resolution for near-air targets; it has high resolution for area imaging and target monitoring; high anti-interference performance; high antenna gain; and it is easy to detect small targets.
2. Broadband band
Millimeter-wave radar uses narrow pulse or wideband FM signals to easily obtain the detailed structural characteristics of the target; the wide spectral expansion capability can reduce multipath, clutter and enhance the anti-interference ability; high distance resolution, with accurate tracking and recognition capabilities of the target.
3. High emission frequency
The high emission frequency of millimeter-wave radar has good detection and identification ability for slow targets and vibration targets, and it is easy to use the doppler frequency characteristics of targets for target characteristic identification; it can penetrate atmospheric pollution and has good detection capabilities under dust, soot and rain and snow conditions.
4. Eliminate false alarms
Personnel monitoring radar based on millimeter wave linear frequency modulation pulse radar chip, integrated FMCW, MIMO, DBF and other technologies, the use of stationary object elimination algorithm, can eliminate stationary objects (such as walls, tables and chairs, etc.); human and non-human object distinction algorithm, can distinguish between people and objects with micro motion (such as rotating electric fans, fluttering curtains, micro-moving green belts, etc.); multi-path interference elimination algorithm, can eliminate the false detection points brought about by target movement; multi-target tracking algorithm, Precise positioning and stabilization tracking of multiple moving targets can be performed. The comprehensive application of these technologies and algorithms can effectively distinguish people from other objects, eliminate false detection, and help achieve accurate counting and stable tracking of multiple targets in indoor and outdoor multi-environments.
5. Protect privacy
In areas where privacy is very important, such as bedrooms, bathrooms, changing rooms, gyms... Most people are more sensitive to the use of optical cameras or other optical technology schemes. Millimeter-wave personnel monitoring radar uses radio frequency signals without screen feedback involving personal privacy, which means that personnel monitoring radar does not provide and leak any information related to personal identity.
6. Installation is hidden
Objects in the environment, such as leaves and opaque glass, can obscure the "line of sight" of devices based on optical technology, ultimately limiting the installation, layout, and use of these devices. MmWave personnel monitoring radar RF signals can penetrate different types of materials such as plywood, thin wood panels, plastics, and opaque glass, making it easy for users to choose unique mounting locations to avoid system damage or keep the appearance clean.
<h1 class="pgc-h-arrow-right" data-track="61" > personnel monitoring radar installation diagram</h1>
Millimeter wave personnel monitoring radar generally adopts wall side mounting method, the installation height is 1.5m ~ 2.5m, the coverage distance is 0.1m ~ 6m, the radar vertical beam angle is 24 °, and the horizontal beam angle is 80 °.
It is suitable for public open areas such as shopping malls, hospitals, office areas, conference rooms, underground garages, corridors, corridors, and corridors, as well as personnel counting, occupancy detection, automatic doors, lighting control, security guards, and motion monitoring in private places such as toilets, gyms, and bedrooms.
<h1 class="pgc-h-arrow-right" data-track="62" > personnel monitor radar specifications</h1>