APPARATUS FOR RECEIVING GPS SIGNAL FOR WIDE AREA SURVEILLANCE SYSTEM
According to the present invention, disclosed is a satellite navigation signal receiving device for a wide area surveillance system. The satellite navigation signal receiving device for a wide area surveillance system of the present invention comprises: a GPS receiving unit that receives a satellite...
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Zusammenfassung: | According to the present invention, disclosed is a satellite navigation signal receiving device for a wide area surveillance system. The satellite navigation signal receiving device for a wide area surveillance system of the present invention comprises: a GPS receiving unit that receives a satellite navigation signal; and a control unit that obtains a time error by reading the satellite navigation signal received from the GPS receiving unit and a pulse signal of an internal oscillator, detects forgery of visual information based on the cumulative control amount of the internal oscillator accumulated in the past, when the time information is determined to be in a normal state, controls the internal oscillator so that the internal oscillator follows the satellite navigation signal depending on the time error and accumulates the cumulative control amount, and when the visual information is determined to be forgery detection, restores the time information by controlling the internal oscillator so that the cumulative control amount of the internal oscillator converges to a set value. Accordingly, the present invention enables stable power operation.
본 발명은 광역 감시 시스템용 위성항법신호 수신장치가 개시된다. 본 발명의 광역 감시 시스템용 위성항법신호 수신 장치는, 위성항법신호를 수신하는 GPS 수신부; 및 GPS 수신부로부터 수신한 위성항법신호와 내부 발진기의 펄스 신호를 읽어 시각오차를 구하고, 과거 누적된 내부 발진기의 누적 제어량에 기초하여 시각정보의 위변조를 탐지한 후 시각정보가 정상상태로 판정된 경우, 시각오차에 따라 내부 발진기가 위성항법신호를 추종하도록 내부 발진기를 제어하고 누적 제어량에 누적하고, 시각정보가 위변조 탐지로 판정된 경우, 누적된 내부 발진기의 누적 제어량이 설정값에 수렴하도록 내부 발진기를 제어하여 시각정보를 회복시키는 제어부;를 포함하는 것을 특징으로 한다. |
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