RU95130U1 - COMPLEX FOR DETECTING HIDDEN CLOTHING ITEMS ON A HUMAN BODY - Google Patents

Abstract

 1. A complex for detecting objects hidden under clothing on the human body, consisting of a receiving and transmitting antenna, connected respectively to a receiver and a transmitter of signals that are connected to a reference generator, while the signal receiver is connected to an analog-to-digital converter, which is connected to the processing device signals, characterized in that N> 2 antennas are assembled in the form of two vertical and symmetrically arranged relative to a person antenna arrays installed with the possibility of movement around a person, in this case, each of the antennas is connected via a switch to a signal receiver and transmitter, respectively, and the signal processing device is connected by a control channel to transmitters, receivers, switches, and the antenna moving mechanism. ! 2. The complex according to claim 1, characterized in that the signal transmitter is a microwave generator that generates a broadband linear frequency-modulated signal. ! 3. The complex according to claim 1, characterized in that the signal processing device is based on a personal computer with the ability to process, manage and display information.

Description

The utility model relates to systems for detecting unauthorized objects and substances in controlled objects and can be used when inspecting passengers in vehicles and visitors to public institutions and buildings.

The well-known "INSTALLATION FOR DETECTING UNSOLVED OBJECTS AND SUBSTANCES IN CONTROLLED OBJECTS" (RF Patent No. 2309432 IPC G01S 13/88, op. 27.10.07) .. The installation contains an antenna, preferably made in the form of a two-dimensional antenna array, a rotary device, a control cabin of inspection objects, a control signal generation unit, a computing unit configured to construct a radio portrait of an object, two radio pulse generators, switches, a quadratic signal detector, an analog-to-digital converter, a digital unit signal processing, forming an array of ranges and amplitudes of signals reflected from each section of the controlled object, a broadband signal receiver, a bandpass filter, a threshold device, a computer, connected in a certain way to each other. This device due to the use of a two-dimensional antenna array and the need to generate very short pulses is difficult.

Known RF patent No. 2283485 IPC G01N 22/00 op. 09/10/2006 "Method for the detection and identification of explosives" RF patent No. 2283485 IPC G01N 22/00 op. 09/10/2006, which describes a device containing an antenna connected via an antenna switch to the output of the transmitter and the input of the receiver, including an amplifier and an analog-to-digital converter, the output of the analog-to-digital converter is connected to a measuring tool, which includes a unit memory, the measuring tool is connected to the display unit. The measuring means and the transmitter are connected by a synchronization circuit. When performing a measuring tool using a processor, it is possible to control the parameters of the probe pulses using this tool, acting on the transmitter control circuit. In particular, it is possible to set the required values of the amplitude, duration of the probe pulse, its power and the carrier frequency of the emitted signal, as well as to set the values of the carrier frequencies for each burst of pulses in the case when a pulse microwave signal is generated in the form of a sequence of bursts for irradiating the controlled object. The decision to detect a dangerous object is made using the reference values stored in the memory block. The device can be made with two antennas, one of which is transmitting and the other is receiving. In this case, the device does not contain an antenna switch, since the antennas are connected respectively to the output of the transmitter and the input of the receiver. The disadvantage of this device is the complexity and, as a consequence, the high cost due to the need to generate pulsed microwave signals, as well as the inability to implement an antenna switch that can switch the antenna from the transmitter to the receiver in the time required to propagate the signal to the object and back (<0.5 m, which reduces the reliability of detection.

For the prototype adopted a utility model No. 87019 op. 09/20/2009 IPC G01N 22/00 - a device for the detection and identification of explosives, consisting of a transmitting and receiving antenna, respectively connected to a transmitter and a receiver of signals, connected to an analog-to-digital converter, the output of which is connected to a signal processing unit - a computing unit and an indication unit, while it additionally contains a reference generator, the outputs of which are connected to a transmitter and a receiver, and the computing unit implements a neural network classifier algorithm. The signal transmitter is a microwave generator that generates unmodulated oscillations with discrete frequency tuning in the frequency band 7.5-12.5 GHz. This device operates in manual mode and is not intended for operational inspection of objects at stationary points; it does not provide a high degree of reliability of detection of unauthorized objects.

The technical result that the utility model is aimed at is the creation of a complex for stationary inspection of objects with high reliability and efficiency.

For this, a complex is proposed for detecting objects hidden under clothing on a human body, consisting of receiving and transmitting antennas connected, respectively, to a receiver and transmitter of signals that are connected to a reference generator, while the signal receiver is connected to an analog-to-digital converter (ADC), which connected to a signal processing device, while N> 2 antennas are assembled in the form of two vertical and symmetrically arranged relative to a person antenna arrays installed with the ability to move around g of a person, while each of the antennas is connected via a switch to a signal receiver and transmitter, respectively, and the signal processing device is connected by a control channel to a transmitter, receiver, switches, and a mechanism for moving antennas.

In addition, the signal transmitter is a microwave generator that generates a broadband linearly frequency-modulated signal.

In addition, the device for signal processing is made on the basis of a personal computer with the ability to process, display information and control.

The figure 1 shows the General block diagram of the device, where -

1 - receiving antennas

2 - receiving switch

3 - receiver

4 - transmitting antennas

5 - transmitting switch

6 - transmitter

7 - analog-digital converter

8 - signal processing device

9 - block reference generator

10 - antenna movement mechanism

The device operates as follows.

To irradiate the person being examined, the transmitter 6 generates a broadband linearly frequency-modulated probe signal, which, through the transmitting switch 5, enters the corresponding antenna 4, which is selected using the switch 5 by the signal from the signal processing device 8. The signal reflected from the object is received by the corresponding receiving antenna 1 and enters the switch 2, the choice of the working channel of which is made according to the signal received from the signal processing device 8. With mutator 2 signal is supplied to the receiver 3, where it is amplified and filtered, after which the signal is supplied to an analog-digital converter 7. The digitized signal is supplied to a signal processing device 8, where it is the accumulation.

The block of the reference generator 9 clocks the receiver 3 and the transmitter 6 for synchronous operation and data acquisition.

When the rotary device 10 is rotated, the pairs of receiving and transmitting antennas are sequentially switched and the received signal is accumulated from all points of space formed vertically by switching the antennas horizontally by rotating the antennas. The signal processing device 8 processes the information received from the analog-digital converter 7 using a neural network classifier, decides on the presence or absence of hidden objects on the human body and displays the result of detection. In addition, the signal processing device 8 controls the operating modes of the transmitter 6, including the frequency tuning frequency, the frequency tuning range of the radiated power, the operating mode of the receiver 3, including its sensitivity and the gain of the output signal, as well as the switching mode of the receiving 2 and transmitting 5 switches, including the switching frequency and the switching sequence of the channels of the switches, and also provides a control signal to start the mechanism for moving the antennas 10.

Thus, this utility model will allow in automatic mode with a high degree of certainty to search a large number of people per unit time.

Claims (3)

1. A complex for detecting objects hidden under clothing on the human body, consisting of a receiving and transmitting antenna, connected respectively to a receiver and a transmitter of signals that are connected to a reference generator, while the signal receiver is connected to an analog-to-digital converter, which is connected to the processing device signals, characterized in that N> 2 antennas are assembled in the form of two vertical and symmetrically arranged relative to a person antenna arrays installed with the possibility of movement around a person, in this case, each of the antennas is connected via a switch to a signal receiver and transmitter, respectively, and the signal processing device is connected by a control channel to transmitters, receivers, switches, and the antenna moving mechanism. 2. The complex according to claim 1, characterized in that the signal transmitter is a microwave generator that generates a broadband linear frequency-modulated signal. 3. The complex according to claim 1, characterized in that the signal processing device is based on a personal computer with the ability to process, manage and display information.