Abstract:
본 발명은 자기누설 피그에 관한 것이다. 본 발명의 일 실시 예에 따른 자기누설 피그는 배관에 자기장을 유도할 수 있도록 자기장 유도부가 설치되어 상기 배관의 내부를 주행하는 동체, 상기 동체의 둘레를 따라 방사상으로 배치되는 연결패널 및 이 연결패널의 끝단에 등 간격으로 분기 연장된 지지홀더로 구성되어 동체에 설치된 거치대, 상기 거치대의 지지홀더에 설치되어 배관의 두께 감소에 따라 증가하는 누설 자기장의 자속밀도를 측정하여 결함 유무를 측정하는 센서모듈 및 상기 지지홀더 사이에 형성되어 지지홀더를 상호 연결하고, 간격을 탄성 유지하는 연결부를 포함한다. 따라서 상기 연결부로 인해 지지홀더의 간격이 일률적으로 탄성 유지됨으로써, 배관의 내부를 자기누설 피그가 주행 중에 돌출부나 장애물을 만날 경우에도 진동과 충격에 의해 센서모듈의 간격이 틀어지는 것을 효과적으로 방지할 수 있다.
Abstract:
PURPOSE: An electromagnetic ultrasonic sensor module is provided to improve efficiency thereof by increasing the intensity and the resistance of SH-wave electromagnetic ultrasonic signals and to easily perform a pipe inspection using a pipe nondestructive inspection robot. CONSTITUTION: An electromagnetic ultrasonic sensor module(1) comprises planar structures(10) and meander coils(11). The planar structures are bent according to a grade of a pipe and formed into a comb shape. The meander coils are coiled around the planar structures. The meander coils are arranged in the planar structures at an equal interval. The planar structures are installed in a yoke. The yoke includes a magnet installed to be moved upward and downward in an electromagnetic ultrasonic probe.
Abstract:
A magnetic leakage pig and a sensor module installed at the magnetic leakage pig are provided to secure reliability of the data by the three directional fixation and uniform arrangement of sensors by using a support. A magnetic leakage pig measuring defect of a pipe by the movement of a magnetic leakage pig body(500) in the pipe includes a pair of magnetic field induction units(100) separated by a predetermined interval at one side and the other side of the magnetic leakage pig body to induce a magnetic field to the pipe; a sensor module(200) installed between the magnetic field induction units to measure a leakage magnetic field when the magnetic field is leaked from the pipe; a support(300) installed at the exterior of the magnetic leakage pig body; and an elastic rotating unit(400) rotatably mounted between the support and the sensor module so that the sensor module is easily contacted to the inner wall of the pipe at a bent area of the pipe.
Abstract:
PURPOSE: A seismic monitoring system is provided to rapidly confirm and measure an earthquake to precisely predict damages due to the earthquake for coping effectively with the tense situation and store the seismic wave data semi-permanently for future investigation. CONSTITUTION: A seismic monitoring system includes a seismic wave monitoring unit for sensing generation of seismic and measuring the movement of ground by acceleration unit, and a seismic wave receiving part for analyzing the acceleration data of the ground, filtering seismic components of natural frequency band at which a supply maintenance office is weakest, performing a vector synthesizing of a horizontal two components(south and north, east and west) and a vertical one component to compute a maximum ground acceleration, determining whether the movement of the ground is an earthquake or a simple impact, analyzing seismic response characteristics and comparing a state of a gas supply management office with a preset value if the movement is determined to be the earthquake, and storing the data and transmitting a seismic alarm, the maximum ground acceleration and a spectrum intensity to a control part.
Abstract:
PURPOSE: An earthquake wave receiver is provided in which the apparatus has enhanced structure enabling rapid and accurate analysis of earthquake wave. CONSTITUTION: An apparatus comprises an input/output communication module(21) for inputting a signal output from an earthquake sensor via an input/out terminal(20), a band pass filter(22) for removing noise from the signal input from module(21) and selecting only the signal required for the set bandwidth, a controller(23) having an acceleration calculating module(24), a trigger module(26) for discriminating impact and earthquake by a frequency analysis when a value higher than a reference value is input and which stores the value to a memory, and a self diagnosis module(25), the controller(23) controlling each unit and operating an algorithm, an LCD(28) for displaying a variety of data for monitoring of performance of each unit, a touch screen input unit(29) for inputting a variety of damping factors and which is arranged at a surface of the LCD(28), an alarm unit(30) for alarming upon detection of a value exceeding a critical threshold, a memory card(36) storing earthquake data, a data output unit(31) linked to SCADA(supervisory control and data acquisition) and which has digital and analog output mode, and an input/output communication module(32) for outputting to an external device the signal input from the unit(31).