Anti-interference alarm for vehicles

Abstract

The invention discloses an anti-interference alarm for vehicles, comprising an antenna outside a casing, a work indicating lamp, a signal strength display window, a power supply switch, a sensitivity button, a mode adjustment button, a charge networking interface and a charge indicating lamp which are electrically connected with an electric circuit board in the casing. The alarm is characterized in that an electric circuit board is provided with a control circuit, an alarm networking interface circuit, a signal strength display circuit, an interference signal receiving circuit, a work indicating circuit and a charge indicating circuit; the alarm networking interface circuit, the signal strength display circuit and the interference signal receiving circuit are connected with the control circuit respectively; and the electric circuit board is also provided with a power supply circuit and a wiring terminal J1 which are connected with the circuits. By the anti-interference alarm, the mobile phone shaped appearance structure for the monitor equipment can be realized, the portability of the equipment is greatly improved; and compared with the conventional monitor equipment, and the accuracy of the identification rate for signal identification is improved by over 30 percent. By adopting the mode of wired and wireless blend networking, the detection distance and the detection range of a system to the interference signal are greatly improved, and the position of the interference source can be accurately provided.

Description

technical field [0001] The invention relates to an alarm device, in particular to an anti-jamming alarm for a car, which is a radio listening device used to deal with and fight against crimes caused by "car signal interceptors". Background technique [0002] At present, a new form has appeared in car theft cases. Criminals use high-power radio transmission equipment to interfere with the central locking system of car users, making careless car users mistakenly think that their doors have been locked after pressing the central locking system. , The criminals then sneaked into the car to commit the crime of theft, and even drove the car away. This form of crime is not uncommon across the country. How to deal with this new form of crime has become a hot spot of common concern of public security departments at all levels and criminal investigation police officers. Using radio reconnaissance equipment to conduct reconnaissance on the enemy's electromagnetic signals to obtain va...

AI Technical Summary

Problems solved by technology

Therefore, the development of radio monitoring technology is also changing with each passing day. At present, the advanced technology of radio monitoring is in the hands of countries represented by the United States, Germany, and France. The main manufacturers of radio monitoring equipment include R&S Company of Germany, TAHLES Company of France, and For companies such as Agilent, most of the domestic radio monitoring equipment relies on imports from these manufacturers, and the price is expensive, often costing hundreds of thousands of euros each. Very expensive, unable to meet practical needs

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