Device for testing cable to be laid inside rooms and stationary objects

FIELD: cables.

SUBSTANCE: invention relates to cable industry and concerns a cable testing to be laid inside rooms and stationary objects. For the testing sample 1 of an optic cable (OC) in the form of coil 2 (OC length in the coil is 10–15 m) is placed on platform 3 of the vibration bench and is rigidly secured to its surface. Before and after platform 3 of the vibrobenchthe tested OC is attached to posts 4 to form two freely hanging semi-loops simulating the OC input-output sections between fixed points (the OC air input from a column to a building) and characterized by the most probable deformation. Sample is fixed on platform 3 on both sides of the vibrobench with clamps 5. Cable on both sides is reeled into two coils 6 with an internal diameter of not less than 20 of the nominal outer diameters of the cable or is wound onto drums with a neck diameter similar to the coil diameter. Ends of tested sample 1 are respectively connected with radiator 7 and receiver 8 with an optical power meter by optical connectors 9.

EFFECT: technical result is creation of a device for testing a cable, which enables to determine parameters-criteria of its usability, such as integrity of optical fibres and shells of the cable, attenuation coefficient of optical fibres and other parameters depending on the optical cable design.

3 cl, 1 dwg

 



 

Same patents:

FIELD: physics, optics.

SUBSTANCE: apparatus comprises a laser beam generator (27), a first polarising filter (29) and a second polarising filter (31), mounted on a shaft and lying at a distance from each other, and a laser radiation detector (33). A laser beam emitted by the generator passes through both filters to the detector. A reflecting system is mounted in the vicinity of the second filter (31) to reflect a beam passing through said filter and return a parallel beam to the detector. The reflecting system comprises a mirror in the form of a truncated cone with an angle of 45°. One of the filters (29) comprises a ring in which polarisation areas and non-polarising areas alternate to form a periodic information sequence representing a measured value and a reference value, respectively.

EFFECT: designing an optical device for measuring torsion of a rotating shaft.

7 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises light source to transmit light onto shaft surface via multiple optic fibres made at multiple points nearby said surface in, in fact, axial direction between the ends of at least one shaft, high-temperature reflection probe built around fibre bundle to detect light reflected from shaft surface and mechanism to measure torque or oscillation at the shaft. The latter comprise coding mechanism composed of changed texture shaped to wedge-like groove on shaft surface of variable depth. Said depth generates the front and rear working point signals so that appropriate time delay can be detected from whatever two positions of said groove for determination of shaft twist angle by differentiation of reflection pattern characteristics during every rotation cycle.

EFFECT: higher precision of measurements.

23 cl, 24 dwg

The invention relates to the field of testing mechanical strength of optical fibers or other filamentary material and improves the accuracy of the test gap

The invention relates to apparatus for determining the damage on the ship, for example, the hull of the vessel containing the distributed optical fiber located near the hull, and these optical fibers are attached to the Central unit, suited for the characterization of optical fibers on the mode of transmission of light to determine the damage to the hull

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises light source to transmit light onto shaft surface via multiple optic fibres made at multiple points nearby said surface in, in fact, axial direction between the ends of at least one shaft, high-temperature reflection probe built around fibre bundle to detect light reflected from shaft surface and mechanism to measure torque or oscillation at the shaft. The latter comprise coding mechanism composed of changed texture shaped to wedge-like groove on shaft surface of variable depth. Said depth generates the front and rear working point signals so that appropriate time delay can be detected from whatever two positions of said groove for determination of shaft twist angle by differentiation of reflection pattern characteristics during every rotation cycle.

EFFECT: higher precision of measurements.

23 cl, 24 dwg

FIELD: physics, optics.

SUBSTANCE: apparatus comprises a laser beam generator (27), a first polarising filter (29) and a second polarising filter (31), mounted on a shaft and lying at a distance from each other, and a laser radiation detector (33). A laser beam emitted by the generator passes through both filters to the detector. A reflecting system is mounted in the vicinity of the second filter (31) to reflect a beam passing through said filter and return a parallel beam to the detector. The reflecting system comprises a mirror in the form of a truncated cone with an angle of 45°. One of the filters (29) comprises a ring in which polarisation areas and non-polarising areas alternate to form a periodic information sequence representing a measured value and a reference value, respectively.

EFFECT: designing an optical device for measuring torsion of a rotating shaft.

7 cl, 5 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of optical measurements and relates to the method and sensor for measurement of temperature and mechanical stresses. Measurements are carried by a sensor, which comprises the first path of optical radiation propagation, which is configured for interaction with the structure, properties of which must be measured; the second path of propagation of optical radiation, which is configured for interaction with the structure, properties of which must be measured; the third path of optical radiation propagation. Besides, the sensor comprises a facility to amplify a signal, which propagates along the third path of optical radiation propagation so that the signal amplifies before it starts propagation along the second path of optical radiation propagation, and the facility to prevent propagation of signals from the second path of optical radiation propagation into the third path of optical radiation propagation.

EFFECT: increased accuracy and distance of measurements.

15 cl, 7 dwg

FIELD: glass.

SUBSTANCE: invention relates to production or manufacture of articles from glass or glass ceramics. Invention is based on providing production of articles from glass or glass-ceramic having accurately characterized thermomechanical properties. To achieve this purpose deformation of glass or glass-ceramic material is measured at least twice in the form of dependence on time, at different rates of change of temperature or mechanical stress. On the basis of the measurements relaxation time values and weight coefficients are determined by simulating. Then on the basis of the relaxation time and the weight coefficients related to distribution of relaxation processes occurring in the article, time-delayed change of a physical value depending upon temperature or voltage is calculated, such as thermal expansion or refraction index in the form of dependence on preset temperature change or variation of voltage.

EFFECT: technical result is higher accuracy of determining thermomechanical properties of articles from glass or glass ceramics with further use of the information to obtain articles from glass or glass-ceramic having accurately characterized thermomechanical properties.

17 cl, 26 dwg

FIELD: cables.

SUBSTANCE: invention relates to cable industry and concerns a cable testing to be laid inside rooms and stationary objects. For the testing sample 1 of an optic cable (OC) in the form of coil 2 (OC length in the coil is 10–15 m) is placed on platform 3 of the vibration bench and is rigidly secured to its surface. Before and after platform 3 of the vibrobenchthe tested OC is attached to posts 4 to form two freely hanging semi-loops simulating the OC input-output sections between fixed points (the OC air input from a column to a building) and characterized by the most probable deformation. Sample is fixed on platform 3 on both sides of the vibrobench with clamps 5. Cable on both sides is reeled into two coils 6 with an internal diameter of not less than 20 of the nominal outer diameters of the cable or is wound onto drums with a neck diameter similar to the coil diameter. Ends of tested sample 1 are respectively connected with radiator 7 and receiver 8 with an optical power meter by optical connectors 9.

EFFECT: technical result is creation of a device for testing a cable, which enables to determine parameters-criteria of its usability, such as integrity of optical fibres and shells of the cable, attenuation coefficient of optical fibres and other parameters depending on the optical cable design.

3 cl, 1 dwg

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