Pistol detection system

• US 5,841,346 A
• Filed: 03/30/1998
• Issued: 11/24/1998
• Est. Priority Date: 12/20/1997
• Status: Expired due to Fees

• Current Assignee: Dastek Corporation
• Original Assignee: Bangsan Chemical Corporation, Byung Yong Park
• Inventors: Park, Byung Yong
• Primary Examiner(s): Hofsass, Jeffery A.
• Assistant Examiner(s): PHAM, TOAN NGOC
• Application Number:
  US09/050,050
• Time in Patent Office: 239 Days
• Field of Search: 340/540, 340/551, 340/552, 340/568, 340/572, 340/573, 340/574, 324/243, 324/239, 324/260
• US Class Current: 340/540
• CPC Class Codes: G01V 3/10 using induction coils

Abstract

A pistol detection system including a main control unit for controlling all constituting units of the system, a magnetic force generating unit for generating a control signal for a generation of magnetic fluxes, a gate for generating magnetic fluxes of a desired intensity while receiving the generated magnetic fluxes, thereby generating an induced voltage, a magnetic force receiving unit for detecting the induced voltage, thereby determining whether or not a person who passes through the gate carries a pistol, a camera for picking up an image of the person who passes through the gate while carrying a pistol, a time generating unit for outputting time information, an image signal processing unit for composing an image signal generated from the camera with the time information generated from the time generating unit, storing the resultant signal, an automatic dialing unit for automatically dialing a previously set telephone number, and interior and exterior alarm lamps respectively for generating an alarm and emitting light in the interior and exterior of a place where the system is installed, when a pistol is detected. Thus, the pistol detection system of the present invention provides an effect of providing an effective preventative measure against the occurrence of crimes using pistols.

Claims

1. A pistol detection system comprising:

a power supply unit for supplying electric power to various constituting units of the system;

a main control unit for controlling an image pickup based on a detection of a pistol while controlling all constituting units of the system based on an ON state of an emergency switch or a radio transmission signal to carry out the generation of an alarm or an automatic dialing;

a magnetic force generating unit for generating a control signal for a generation of magnetic fluxes under the control of the main control unit;

a gate having a portion adapted to generate magnetic fluxes of a desired intensity in response to the control signal from the magnetic force generating unit and a portion adapted to receive the generated magnetic fluxes, thereby generating an induced voltage;

a magnetic force receiving unit for detecting the induced voltage generated from the gate, determining whether or not a person who passes through the gate carries a pistol, based on the detected induced voltage, and applying the result of the determination to the main control unit;

a camera installed in the vicinity of the gate, the camera serving to pick up an image of the person who passes through the gate while carrying a pistol, under the control of the main control unit;

a time generating unit for outputting time information;

an image signal processing unit for composing an image signal generated from the camera with the time information generated from the time generating unit, storing the resultant signal, and applying the stored signal to a monitor or video recorder when a replay function is selected;

an automatic dialing unit for automatically dialing a previously set telephone number under the control of the main control unit;

an alarm driving unit for controlling external alarm units under the control of the main control unit;

a searchlight for emitting light to the gate under the control of the alarm driving unit when the camera carries out an image pickup operation thereof;

an interior alarm lamp for generating an alarm and emitting light in the interior of a place where the system is installed, when a pistol is detected, under the control of the alarm driving unit;

an exterior alarm lamp for generating an alarm and emitting light in the exterior of the place where the system is installed, when a pistol is detected, under the control of the alarm driving unit;

a key input unit for selecting and adjusting functions of various units of the system including a volume adjustment and ON/OFF control for the interior and exterior alarm lamps, next-dialing ON/OFF control, telephone setting, and receiving magnetic force sensitivity control;

a radio transmitter for selecting desired functions of the system in a radio manner; and

a radio receiver for receivng a transmission signal from the radio transmitter indicative of a selected function, and sending the transmission signal to the main control unit.

2. The pistol detection system in accordance with claim 1, wherein the main control unit sets a metal object having a mass and volume corresponding to those of a previously set standard pistol, as a minimum object to be detected.