WTPL See Through Wall Radar Human Detection Device

Description

This latest model of detector is designed to locate people in various premises behind walls and optically opaque barriers while conducting counter-terrorism and special operations, as well as during search and rescue operations to rescue people under rubble during natural disasters or located in smoke-filled rooms during fires.

It is used by the units of the Ministry of Internal Affairs of Russia to detect unauthorized presence and movement of people in the premises under control.

The tactics of using the detector involves two operational options i.e.:

• Stationary with locating the detector on a tripod installed by the barrier;
• Operative with holding the detector pressed to the wall with hands.

Technical Characteristics
 

Detection of human motion
Behind brick wall, thickness	0,4 m
Behind concrete wall, thickness	0,2 m
Behind stonework wall, wood thickness	0,4 m
At a distance of people from the wall, up to	10-37,5 m *
With a radar distance to the wall, up to	10-37,5 m *
Viewing angles
In azimuth	1200
In elevation	900
Resolution
In azimuth	±150
Operation range, at least	±0,3 m
Time to detect
Human after his appearance in the field of view	3 sec
Motionless human	10 sec
General
Operating frequency	3,5 GHz
Average signal power	4 mW
Motion sensitivity	±0,5 sm
Operating temperature range	-20°С ... +40°С
Preparation time, up to	5 min
Continuous operation time, at least	4 hours
Soil surface survey depth, up to	1 m
Dimensions of the detector	350х200х80 mm
Weight, up to	350 g

*upon request

Principle of Operation

The principle of operation of the detector is that the transmitting active phased array antenna emits a short radio pulse to a given viewing sector. The pulse is reflected from the objects encountered on the signal path and is received by the receiving active phased array antenna. The received signal is amplified and detected by a phase detector.

If the object moves, the frequency of the signal reflected from this object changes to the Doppler frequency, and an alternating voltage with the Doppler frequency appears at the output of the phase detector. The voltage is converted into digital form, averaged over a certain period of time; the spectrum of the signal is calculated; the spectral components corresponding to the movement are marked. Their value is compared to the set detection threshold and there is a mark in the given viewing sector on the range corresponding to lag time of the reflected pulse, the color intensity of which is proportional to the amplitude of the spectral component. The spectrum of the signal is calculated according to the data obtained within 1.5 seconds and corresponds to the signals reflected from moving people in the frequency range of 1-8 Hz.

1. In addition, according to the data obtained, within 12 seconds the spectrum of the signal is detected in the frequency range of 0.1-0.5 Hz, which corresponds to a change in the frequency of the signal reflected from human chest during breathing.

 
2. Information on any moving objects in the range of radar operation is displayed as red marks in the corresponding sectors angularly and at predetermined distance on the radar display.

3. Moving is observed as moving of the mark on the display. Mark presence in neighboring sectors angularly and at the same time stands for target location on the border of sectors.

Attention! If you use two or more radars, it is prohibited to swap their displays! Each display keeps its own settings!

4. The screen is updated every 1 second.

5. A non-moving target is detected by breathing. To detect a non-moving object, the required time can be increased to 3 - 6 seconds.

Prepare and Switch on

1. Remove the radar from the transport case.

2. Remove the tripod and the base for mounting the radar on the tripod from the package box. Adjust tripod height, fasten the radar on the base using levers and install the tripod by the wall or away from it at no more than 5 meters. Align the back of the radar to the obstacle. Connect the display to the radar via cable.

3. In case of on-the-spot operation, take the radar in hands and press the back side against the obstacle.

4. Turn on the radar using the button on the side of the device. The green LED lights up and the display shows controlled spaces, divided into 6 sectors and 2 half rings. 3 seconds after switching, the radar is ready to start operating. The red marks appear to indicate functionality of the device.

5. Voltage supply is controlled at the top right of the screen according to color mark and value. Charged battery is indicated as green marks. Full charge corresponds to 100%, sufficient charge to 90%. Operation is permitted at a charge of not less than 10%!If the charge is less than 10% (the indicator is red), the battery needs to be charged!

6. In the absence of targets, there might be "wandering" marks on the screen.

Shutdown

1. After using, turn off the radar by pressing the button on the side panel.

2.  LED and display go off.

3.  After using, it is recommended to charge the battery.

4. Charging is carried out only when the device is turned off.

5. Full charging lasts about 8 hours; the internal charger will automatically stop charging when the desired voltage is achieved.

Physical Characteristics

Height	200 mm
Width	350 mm
Thickness	80 mm
Weight	350 g
Case	Plastic
Operation time	at least 4 hours

Package Contents

1. Protective Case
2. Radio Electronic Unit
3. Tablet with the program
4. Battery charger for Electronic Unit
5. Tablet charger
6. USB cable
7. Operating instructions

For more details, you may contact Worldwide Technologies, See Through Wall Radar Supplier in Dehradun Uttarakhand India at www.wtpl.co.in