Device for detecting leaks in pipelines
First Claim
1. A pipeline with apparatus for status detection, in particular leak detection, comprising:
- an inner medium-carrying pipe (1) for the transportation of a medium, a heat-insulating layer (2), and an outer protective pipe (3),at least one sensor (4), which includes a sensor device (7) responsive to at least one of moisture level and temperature level, and an induction coil (5) arranged in the region of the heat-insulating layer (2);
the sensor device (7) and the induction coil (5) form a resonating circuit whose resonance properties depend on the state of the sensor device (7) as a result of the conditions (moisture, temperature) prevailing in the heat-insulating layer; and
an interrogation device (20) which includes a frequency generator (26), an exciter coil (25), and an evaluation device (24) and can be brought into a position near the sensor (4) to feed electromagnetic radiation thereto, the resonance properties of the sensor resonating circuit being detected.
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Accused Products
Abstract
Apparatus for status detection, in particular leak detection, in pipelines for the transportation of media, in particular, steam or hot water. The pipeline respectively comprises an inner medium-carrying pipe (1), an adjoining heat-insulating layer (2), and a outer protective pipe (3). Disposed in the region of the heat-insulating layer (2) is at least one sensor unit (4) with an induction coil (5) and a moisture and/or temperature dependent sensor (7). An interrogation device (20), which includes an exciter coil (25) with a transmitting device (22), a receiving device (23), and an evaluation device (24), permits interrogation of the condition of the sensor unit (4). The interrogation device can be portable, coupled to a lap-to, or can be in the form of a stationary fitment above the sensor unit (4).
46 Citations
13 Claims
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1. A pipeline with apparatus for status detection, in particular leak detection, comprising:
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an inner medium-carrying pipe (1) for the transportation of a medium, a heat-insulating layer (2), and an outer protective pipe (3), at least one sensor (4), which includes a sensor device (7) responsive to at least one of moisture level and temperature level, and an induction coil (5) arranged in the region of the heat-insulating layer (2); the sensor device (7) and the induction coil (5) form a resonating circuit whose resonance properties depend on the state of the sensor device (7) as a result of the conditions (moisture, temperature) prevailing in the heat-insulating layer; and an interrogation device (20) which includes a frequency generator (26), an exciter coil (25), and an evaluation device (24) and can be brought into a position near the sensor (4) to feed electromagnetic radiation thereto, the resonance properties of the sensor resonating circuit being detected. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for status detection of moisture and/or temperature in the heat-insulating layer of a pipeline, comprising:
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a sensor device (7) adapted to respond to at least one of moisture level and temperature level and in that situation changes its electrical property; an induction coil (5) connected together with the sensor device (7) to form an electrical resonating circuit whose resonance properties depend on the electrical property of the sensor device (7); the sensor device (7) and the induction coil (5) form a sensor (4) which is adapted to co-operate with an interrogation device (20) for the condition of the sensor; and the interrogation device (20) includes a frequency generator (26), an exciter coil (25), and an evaluation device (24) in order by irradiation of electromagnetic energy to detect the resonance properties of the sensor resonating circuit. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification