Intrusion detection system and intrusion detection apparatus

An intrusion detection apparatus comprising:

• a detection controller including a detection signal generator that generates a detection signal which is subjected to SS (spread spectrum) spreading to detect an intrusion into a monitoring area;
• a reception signal processor that extracts from a received detection signal only a signal having a specific path length by SS (spread spectrum) de-spreading;
• an electric field variation calculator that calculates an amount of variation in the signal that is received over the specific path length;
• a threshold/block table that stores a predetermined threshold and a corresponding pair of an area number and a block number;
• and a threshold determination device that compares the amount of variation in the received electric field with the threshold stored in the threshold/block table, and detects that an intruder exists within an area when the amount of variation in an electric field exceeds the threshold;
• a transmitting leaking transmission path that is connected to the detection controller and emits a detection signal as an electric wave;
• a receiving leaking transmission path that is connected to the detection controller, laid apart from the transmitting leaking transmission path, and receives the electric wave emitted from the transmitting leaking transmission path;
• a light emitter and a sound generator that are connected to the detection controller and inform an observer and the intruder via a light and a sound that an intrusion occurred;
• and a detection information display that is connected to the detection controller and displays the area number and the block number where the intrusion occurred on the screen, wherein the detection controller includes an adjusting detection information extractor that watches a change in the amount of variation in an electric field at the time of the intrusion and calculates the area number where the amount of variation in an electric field increases and the block number therefore, and a maximum value of the amount of variation in an electric field;
• a remote controller includes a remote control input device through which, based on information extracted by the adjusting detection information extractor, and informed to a setting operator who exists near the receiving leaking transmission path via a sound issued by the sound generator, the setting operator inputs information required for threshold adjustment and block adjustment, and a remote control signal generator that generates a signal in which signal intensity is changed with a specific pattern to transmit the information entered by the remote control input device as digital data;
• and the detection controller includes a reception signal intensity detector that detects the change in the reception signal intensity caused by reception at the receiving leaking transmission path of the signal generated by the remote control signal generator, a remote control signal detector that compares the change in the reception signal intensity detected by the reception signal intensity detector with the specific pattern transmitted by the remote control signal, detects transmitted digital data, and detects information required for threshold adjustment and block adjustment, and a table update device that stores a new threshold and a corresponding pair of the area number and the block number from the information detected by the remote control signal detector.