A device for contactless detection of the presence and location of the metal pipelines defects

摘要

The invention relates to the field of inspection of metal structures and can be used on the main pipelines. Device for the contactless detection of the presence and location of defects in the metallic conduit, comprising a magnetic field sensor system, an analog-digital converter (ADC) generating unit and the frequency dividing control unit, a keyboard, a display unit information, the unit absolute geolocation, a memory unit, wherein and generating the output frequency divider coupled to the first input of the ADC, the first control unit output is connected to the input of the storage unit, the keyboard output is connected to the third input of the control unit; further comprises an accelerometer block amplify signals the magnetic field sensors, power analog subtraction and generator excitation magnetic field sensors, wherein the first generator output coupled to an input of the sensor system, the output of which is connected to a first input of amplifying the signals of the magnetic field sensors, the second of which entry is connected a second output of the generator and to the first output signal amplification unit of the magnetic field sensor is connected the second input of the ADC, to the third input of which is connected the output of unit analog subtraction, to the input of which is connected a second output unit gain of sensor signals, the ADC output is connected to the first input of the control unit, to the second input of which the control unit is connected the output of the absolute geographical reference block to the fourth input of the control unit is connected output of the accelerometer unit, and a second output connected to to the input of the information display unit. The purpose of this utility model is to improve the measurement accuracy of the device by providing interference cancellation,; arising from displacement sensors in a constant magnetic field magnet.