Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sensormatic Electronics CorpfiledCriticalSensormatic Electronics Corp
Priority to AR31361489ApriorityCriticalpatent/AR246003A1/en
Application grantedgrantedCritical
Publication of AR246003A1publicationCriticalpatent/AR246003A1/en
UNA DISPOSICION ELECTRONICO DE SEGURIDAD, QUE COMPRENDE: UN TRANSMISOR DE UNA SENAL A UNA FRECUENCIA CENTRAL FC QUE DEFINE UN CAMPO ELECTROMAGNETICO EN UN AREA PREDETERMINADA MODULADA EN FRECUENCIA POR UNA SENAL DE DETECCION EN UNA FRECUENCIA DE MODULACION DE DETECCION FD SIENDO DICHA FRECUENCIA CENTRAL BARRIDA A LO LARGO DE UN RANGO DE FRECUENCIAS; UN CIRCUITO RESONANTE DE ETIQUETA; Y UN DETECTOR DE UNA SENAL QUE TIENE UNA FRECUENCIA QUE ES, COMO MINIMO, UNA COMPONENTE DE LA FRECUENCIA FD, QUE COMPRENDE UN CIRCUITO LOGICO DE DETECCION, PARA DAR LA ALARMA EN RESPUESTA A LA DETECCION DE DICHA SENAL.AN ELECTRONIC SAFETY PROVISION, INCLUDING: A TRANSMITTER FROM A SIGNAL TO A CENTRAL FREQUENCY FC THAT DEFINES AN ELECTROMAGNETIC FIELD IN A DEFAULT AREA MODULATED IN FREQUENCY BY A DETECTION SIGNAL IN A FREQUENCY OF DETECTION MODULE DUE TO A FREQUENCY DUE TO FREQUENCY ALONG A RANGE OF FREQUENCIES; A RESONANT LABEL CIRCUIT; AND A DETECTOR OF A SIGNAL THAT HAS A FREQUENCY THAT IS, AT LEAST, A COMPONENT OF THE FD FREQUENCY, WHICH INCLUDES A LOGIC DETECTION CIRCUIT, TO GIVE THE ALARM IN RESPONSE TO THE DETECTION OF SUCH SIGNAL.
PROCEDURE AND SYSTEM FOR THE DETECTION OF THE RESONANCE EFFECTS OF A LABEL IN A FIELD OF FREQUENCY SWEEP INTERROGATION THROUGH THE DEMODULATION OF A SINGLE SIDE BAND.
Electronic security device comprising a sign unit with an electronic sound signal which changes frequency in the deactivated state. the device consists of a receiving antenna coupled to a sign unit detector which in turn...
Security element for electronic surveillance Security element for electronic surveillance of articles and electronic surveillance system in combination with a security element for electronic surveillance of articles