Security alarm device

• US 20060170552A1
• Filed: 02/25/2004
• Published: 08/03/2006
• Est. Priority Date: 02/27/2003
• Status: Active Grant

• Current Assignee: Zakritoe Aktsionernoe Obschestvo "Kasiss"
• Original Assignee: Zakritoe Aktsionernoe Obschestvo "Kasiss"
• Inventors: Rikhter, Sergey Georgievich, Lenshin, Vitaly Petrovich
• Granted Patent: US 7,456,734 B2
• Time in Patent Office: Days
• US Class Current: 340/572.100
• CPC Class Codes: G08B 13/1427 with transmitter-receiver for distance detection

Abstract

The inventive security alarm device based on noise-like signals consists of a transmitting unit (1) which is arranged on each guarded object and comprises a serially arranged pseudorandom sequence generator (2), a noise radiosignal conditioner (3), power amplifier (4), a transmitting antenna (5), a receiving unit (6) which is arranged in a user and comprises a receiving antenna, an input filtering and matching chain (8), a bandpass amplifier (9), unit for optimal processing a noise-like signal on acoustic surface waves (10), a release device (14) and an alarm unit (15). The transmitting unit (1) and the receiving unit (6) have the same signal-carrier frequency. Said receiving unit (6) comprises N in-parallel units for optimal processing the noise-like signal on the acoustic surface waves (10), a commutator (11) having N signal inputs, N signal outputs and a control input, a control system (12) for the commutator (11) provided with two inputs and outputs one of which is connected to the control input of the commutator (11), a dual-threshold decision system (13) provided with N inputs and two outputs. Each of N signal outputs of the commutator (11) is connected to one of N inputs of the dual-threshold decision system (13) whose one output is connected to the input of the release device (14), the second output thereof being connected to one of the inputs of the control system (10) for the commutator (11). In addition, the alarm unit (15) comprises a liquid-crystal display (17). The output of the release device (14) is connected to the input of an alarm device (16) and to the second input of the control system (10) for the commutator (11), the second output thereof being connected to the input of the liquid-crystal display.

Claims

1. The security alarm device based on noise-like signals consists of a transmitting unit which is arranged on each guarded object and comprises a serially arranged pseudorandom sequence generator, a noise radiosignal conditioner, power amplifier, a transmitting antenna, a receiving unit which is arranged in a user and comprises a receiving antenna, an input filtering and matching chain, a bandpass amplifier, unit for optimal processing a noise-like signal on acoustic surface waves, a release device and an alarm unit, wherein the transmitting unit and the receiving unit have the same signal-carrier frequency, characterized in that said receiving unit comprises N in-parallel units for optimal processing the noise-like signal on the acoustic surface waves, a commutator having N signal inputs, N signal outputs and a control input, a control system for the commutator provided with two inputs and two outputs one of which is connected to the control input of the commutator, a dual-threshold decision system provided with N inputs and two outputs, each of N signal outputs of the commutator is connected to one of N inputs of the dual-threshold decision system whose one output is connected to the input of the release device, the second output thereof being connected to one of the inputs of the control system for the commutator, the alarm unit further comprises a liquid-crystal display, the output of the release device is connected to the input of an alarm device and to the second input of the control system for the commutator, the second output thereof being connected to the input of the liquid-crystal display.