发明名称 |
Defect inspection magnetometer, used in e.g. high pressure gas pipelines, comprises magnetic sensor rings, multiplexer, amplifier and signal processing instrumentation |
摘要 |
Magnetic sensor signals are connected to multiplexer inputs. Its outputs are connected to amplifier inputs. The amplifier output is sent to instruments measuring, processing and recording the data Preferred Features: Semiconductor sensors are employed. The tubing is magnetized through internal contact with two belts of ferromagnetic brushes installed on magnets. The magnetic field sensors are installed between the brushes, forming a further ring adjacent to the internal surface. After the brush belts, a second sensor belt is mounted, downstream of the instrument body. A temperature sensor follows the first and/or second belt of sensors. A continuous current source is connected to the sensor inputs. The instrument measures the voltage at the sensor outputs. The magnetic field transducer assembly, includes a current stabilizer and the sensors are connected in series to this supply circuit. Cavities in the transducer assembly are filled with a composite, and the sensors each have a magnetically-sensitive region surrounded by a non-sensitive region. Minimum thickness of the layer between a sensor and the medium carried, is at least 1 mm. On the magnetometer body a distance meter is mounted. One of its outputs is connected to a generator of sensor addresses for interrogation. Command inputs of the multiplexer are digital and are connected to outputs of the address generator.
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申请公布号 |
FR2819313(A1) |
申请公布日期 |
2002.07.12 |
申请号 |
FR20010016650 |
申请日期 |
2001.12.21 |
申请人 |
ZAO"NEFTEGAZCOMPLEKTSERVICE" |
发明人 |
GAVRJUSHIN ALEXANDR FEDOROVICH;TSATSUEV MIKHAIL SEMENOVICH;FERCHEV GRIGORY PETROVICH;TEVRJUKOV MIKHAIL NIKOLAEVICH;URYADOV ALEXANDR SERGEEVICH;KARAGIN BORIS ALEXEEVICH |
分类号 |
G01N27/83;G01N27/72;(IPC1-7):G01N27/82 |
主分类号 |
G01N27/83 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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