Abstract: A Sophisticated algorithm for processing sensors data in a four dimensional space including location and time, includes a method for detecting an intruder's path in a location and time space, comprising: a. Measuring signals from a plurality of sensors distributed in a protected location; b. storing the measured sensors data, together with a time stamp for each measurement; c. transmitting the sensors data to a processing center; d. processing the sensors data using the location and time relationships to detect movement of a source of the signals; and e. issuing an alarm if and when a movement of the source is detected. A method for detecting unauthorized access to oil, gas or other pipes, by monitoring the protective cathodic voltage and detecting changes in the voltage which are indicative of a technical failure or a deliberate attack on the pipe.

Abstract: A method for detecting leakage from a pipe uses multiple channels/inputs, wherein a low frequency range input measures seismic noises, and a high frequency range input measures cavitation noises. A leakage indication is issued if both the low frequency and high frequency noises are simultaneously detected. A Sophisticated algorithm for processing sensors data in a four dimensional space includes location and time, includes a method for detecting an intruder's path in a location and time space. A method for detecting unauthorized access to oil, gas or other pipes, by monitoring the protective cathodic voltage and detecting changes in the voltage which are indicative of a technical failure or a deliberate attack on the pipe.

Abstract: A Wireless communications protocol/method comprises: a. Sensors data size and structure are constant, and consist of several fields; b. The sensors message include one or more of the following: 1) a 8 to 16 bits long preamble of a start sequence, for example a binary 1010 . . . binary sequence 2) a sync sequence of for example 8 bits of a 11001100 sequence 3) a sensor's unique ID number of for example 8 to 16 bits 4) several bits of sensor's internal clock counter 5) several bits indicating the message type 6) data, for example 16 bits of data, and/or 7) CRC (for Cyclic Redundancy Check purposes), for example 8 to 16 bits. A method for detecting leakage from a pipe uses multiple channels/inputs, wherein a low frequency range input measures seismic noises, and a high frequency range input measures cavitation noises.

Abstract: A method for detecting unauthorized access to oil, gas or other pipes, by monitoring the protective cathodic voltage and detecting changes in the voltage which are indicative of a technical failure or a deliberate attack on the pipe. A method for detecting leakage from a pipe using multiple channels/inputs, wherein a low frequency range input measures seismic noises, and a high frequency range input measures cavitation noises, and wherein a leakage indication is issued if both the low frequency and high frequency noises are simultaneously detected. A low power consumption Wireless communications protocol is used.

Abstract: A sensing unit comprising sensor means enclosed in a casing made of a ferromagnetic material, to achieve a ferromagnetic shield. The sensing unit may further include signal processing means, also enclosed in the ferromagnetic casing. A distributed system for measuring, processing and displaying information from a plurality of sensors comprises a plurality of sensor units. A method for quick detection of offenders of oil, gas or other pipes, by monitoring the protective cathodic voltage and detecting quick changes in the voltage. A method for detecting leakage from a pipe using multiple channels/inputs, wherein a low frequency range input measures seismic noises, and a high frequency range input measures cavitation noises, and wherein a leakage indication is issued if both the low frequency and high frequency noises are simultaneously detected.