3 research outputs found
ΠΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»Ρ ΡΠΈΠ»Ρ ΡΠΎΠΊΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²ΠΎΠ»ΠΎΠΊΠ½Π°
Due to the development of automation and control systems, methods and devices for measuring of electric current large values are of great interest. The aim of the work was to develop a schematic diagram of a distributed current strength sensor based on the Brillouin optical frequency domain analysis; to create a mathematical model of the sensor to demonstrate its work and to calculate the basic parameters of the sensor. To provide the measurement optical fiber with conductive coating is used. Between the current bus, where current is measured, and conductive coating the Ampere force arises. Strain occurs in optical fiber due to this force. Stimulated Brillouin scattering has the strain dependent characteristic frequency. Shift of the characteristic frequency allows to measure current in the bus. To measure the characteristic frequency and the location of its shift Brillouin optical frequency domain analysis is used.The mathematical model of sensor operation based on tree-wave model of stimulated Brillouin scattering is demonstrated. This model allows calculating intensity of optical signal in the fiber in dependence of characteristic frequency shift. Brillouin optical frequency domain analysis uses inverse Fourier transform to obtain pulse response.A schematic diagram of a distributed current sensor based on the method of Brillouin optical frequency domain analysis is presented. An a priori estimate of parameters of the measuring system was carried out on the basis of the mathematical model of stimulated Brillouing scattering in an optical fiber. The spatial resolution of the sensor when determining the length and location of fiber sections was 0.06 m. The resolution of the sensor was 0.22 kA, the maximum value of the current strength was 25 kA. Dependence of the sensor operation at different powers of the laser used was investigated. The refractive index change influence on the result of measurements was estimated.Π ΡΠ²ΡΠ·ΠΈ Ρ ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ΠΌ ΡΠΈΡΡΠ΅ΠΌ Π°Π²ΡΠΎΠΌΠ°ΡΠΈΠ·Π°ΡΠΈΠΈ ΠΈ ΠΊΠΎΠ½ΡΡΠΎΠ»Ρ Π±ΠΎΠ»ΡΡΠΎΠΉ ΠΈΠ½ΡΠ΅ΡΠ΅Ρ Π²ΡΠ·ΡΠ²Π°ΡΡ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΈ ΠΏΡΠΈΠ±ΠΎΡΡ Π΄Π»Ρ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ Π±ΠΎΠ»ΡΡΠΈΡ
Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ ΡΠΈΠ»Ρ ΡΠΎΠΊΠ°. Π¦Π΅Π»ΡΡ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ»Π°ΡΡ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠ° ΠΏΡΠΈΠ½ΡΠΈΠΏΠΈΠ°Π»ΡΠ½ΠΎΠΉ ΡΡ
Π΅ΠΌΡ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠ΅Π½ΡΠΎΡΠ° ΡΠΈΠ»Ρ ΡΠΎΠΊΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠ°ΡΡΠΎΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΡ ΠΠ°Π½Π΄Π΅Π»ΡΡΡΠ°ΠΌΠ°βΠΡΠΈΠ»Π»ΡΡΠ½Π°; cΠΎΠ·Π΄Π°Π½ΠΈΠ΅ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΡΠ΅Π½ΡΠΎΡΠ° Π΄Π»Ρ Π΄Π΅ΠΌΠΎΠ½ΡΡΡΠ°ΡΠΈΠΈ Π΅Π³ΠΎ ΡΠ°Π±ΠΎΡΡ ΠΈ ΡΠ°ΡΡΠ΅Ρ Π΅Π³ΠΎ ΠΎΡΠ½ΠΎΠ²Π½ΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ².ΠΠ»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΠΎΡΡ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π²ΠΎΠ»ΠΎΠΊΠ½ΠΎ Ρ ΡΠΎΠΊΠΎΠΏΡΠΎΠ²ΠΎΠ΄ΡΡΠΈΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ. ΠΠ΅ΠΆΠ΄Ρ ΡΠΎΠΊΠΎΠ²ΠΎΠΉ ΡΠΈΠ½ΠΎΠΉ, ΡΠΈΠ»Ρ ΡΠΎΠΊΠ° Π² ΠΊΠΎΡΠΎΡΠΎΠΉ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΡ, ΠΈ ΡΠΎΠΊΠΎΠΏΡΠΎΠ²ΠΎΠ΄ΡΡΠΈΠΌ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ΠΌ Π²ΠΎΠ·Π½ΠΈΠΊΠ°Π΅Ρ ΡΠΈΠ»Π° ΠΠΌΠΏΠ΅ΡΠ°, ΠΊΠΎΡΠΎΡΠ°Ρ Π² ΡΠ²ΠΎΡ ΠΎΡΠ΅ΡΠ΅Π΄Ρ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΠΏΠΎΡΠ²Π»Π΅Π½ΠΈΡ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π²ΠΎΠ»ΠΎΠΊΠ½Π°. ΠΡΠ½ΡΠΆΠ΄Π΅Π½Π½ΠΎΠ΅ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΠ΅ ΠΠ°Π½Π΄Π΅Π»ΡΡΡΠ°ΠΌΠ°βΠΡΠΈΠ»Π»ΡΡΠ½Π° ΠΈΠΌΠ΅Π΅Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΡΡ ΡΠ°ΡΡΠΎΡΡ, Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΠΊΠΎΡΠΎΡΠΎΠΉ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ Π²Π΅Π»ΠΈΡΠΈΠ½Ρ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΈ Π²ΠΎΠ»ΠΎΠΊΠ½Π°. ΠΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΡΡΠΎΠΉ ΡΠ°ΡΡΠΎΡΡ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΈΠ·ΠΌΠ΅ΡΠΈΡΡ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΡΠΈΠ»Ρ ΡΠΎΠΊΠ° Π² ΡΠΎΠΊΠΎΠ²ΠΎΠΉ ΡΠΈΠ½Π΅. ΠΠ»Ρ ΡΠ΅Π³ΠΈΡΡΡΠ°ΡΠΈΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ°ΡΡΠΎΡΡ ΠΈ ΡΠΈΠΊΡΠ°ΡΠΈΠΈ ΠΌΠ΅ΡΡΠΎΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ Π²ΠΎΠ·ΠΌΡΡΠ΅Π½ΠΈΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΡΡ ΠΌΠ΅ΡΠΎΠ΄ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠ°ΡΡΠΎΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΡ ΠΠ°Π½Π΄Π΅Π»ΡΡΡΠ°ΠΌΠ°β ΠΡΠΈΠ»Π»ΡΡΠ½Π°.ΠΡΠΈΠ²Π΅Π΄Π΅Π½Π° ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠ°Π±ΠΎΡΡ ΡΠ΅Π½ΡΠΎΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΡΠ΅Ρ
Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π²ΡΠ½ΡΠΆΠ΄Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΡ ΠΠ°Π½Π΄Π΅Π»ΡΡΡΠ°ΠΌΠ°βΠΡΠΈΠ»Π»ΡΡΠ½Π°. ΠΠ°Π½Π½Π°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ Π½Π°ΠΉΡΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π°, ΠΏΡΠΎΡ
ΠΎΠ΄ΡΡΠ΅Π³ΠΎ ΠΏΠΎ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠΌΡ Π²ΠΎΠ»ΠΎΠΊΠ½Ρ, Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠ°ΡΡΠΎΡΡ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΡ. ΠΠ΅ΡΠΎΠ΄ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅Ρ ΠΎΠ±ΡΠ°ΡΠ½ΠΎΠ΅ Π€ΡΡΡΠ΅-ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ Π΄Π»Ρ ΠΏΠΎΡΡΡΠΎΠ΅Π½ΠΈΡ ΡΡΠ½ΠΊΡΠΈΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΎΡΠΊΠ»ΠΈΠΊΠ°.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π° ΠΏΡΠΈΠ½ΡΠΈΠΏΠΈΠ°Π»ΡΠ½Π°Ρ ΡΡ
Π΅ΠΌΠ° ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠ΅Π½ΡΠΎΡΠ° ΡΠΈΠ»Ρ ΡΠΎΠΊΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΌΠ΅ΡΠΎΠ΄Π° Π°Π½Π°Π»ΠΈΠ·Π° ΡΠ°ΡΡΠΎΡΠ½ΡΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΡ ΠΠ°Π½Π΄Π΅Π»ΡΡΡΠ°ΠΌΠ°βΠΡΠΈΠ»Π»ΡΡΠ½Π°. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Π° Π°ΠΏΡΠΈΠΎΡΠ½Π°Ρ ΠΎΡΠ΅Π½ΠΊΠ° ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΈΠ·ΠΌΠ΅ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΠΈΡΡ
ΠΎΠ΄Ρ ΠΈΠ· ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΠΈ Π²ΡΠ½ΡΠΆΠ΄Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠ°ΡΡΠ΅ΡΠ½ΠΈΡ ΠΠ°Π½Π΄Π΅Π»ΡΡΡΠ°ΠΌΠ°βΠΡΠΈΠ»Π»ΡΡΠ½Π° Π² ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠΌ Π²ΠΎΠ»ΠΎΠΊΠ½Π΅. ΠΡΠΎΡΡΡΠ°Π½ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ ΡΠ°Π·ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ ΡΠ΅Π½ΡΠΎΡΠ° ΠΏΡΠΈ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠΈ Π΄Π»ΠΈΠ½Ρ ΠΈ ΠΌΠ΅ΡΡΠΎΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ ΡΡΠ°ΡΡΠΊΠΎΠ² Π²ΠΎΠ»ΠΎΠΊΠ½Π° ΡΠΎΡΡΠ°Π²Π»ΡΠ΅Ρ 0,06 ΠΌ. Π Π°Π·ΡΠ΅ΡΠ°ΡΡΠ°Ρ ΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΡ ΡΠ΅Π½ΡΠΎΡΠ° ΡΠΎΡΡΠ°Π²Π»ΡΠ΅Ρ 0,22 ΠΊΠ, ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ ΡΠΈΠ»Ρ ΡΠΎΠΊΠ° 25 ΠΊΠ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π° Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΡ ΡΠ°Π±ΠΎΡΡ ΡΠ΅Π½ΡΠΎΡΠ° ΠΏΡΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΌΠΎΡΠ½ΠΎΡΡΡΡ
ΠΈΠ·Π»ΡΡΠ΅Π½ΠΈΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅ΠΌΠΎΠ³ΠΎ Π»Π°Π·Π΅ΡΠ°. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Ρ ΠΏΡΠ΅Π»ΠΎΠΌΠ»Π΅Π½ΠΈΡ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π²ΠΎΠ»ΠΎΠΊΠ½Π° Π½Π° ΡΠ΅Π·ΡΠ»ΡΡΠ°Ρ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΡ
A Loop All-Fiber Current Sensor Based on Single-Polarization Single-Mode Couplers
Low current sensitivity and insufficient system stability are two key problems in all-fiber current sensor (AFCS) studies. In order to solve the two problems, a novel AFCS combining single-polarization single-mode (SPSM) couplers and a loop structure is presented in this paper with a design that incorporates the advantages of both SPSM couplers and a loop structure. SPSM couplers are shown to simplify the AFCS system and reduce the risk of interference, and the loop structure can enhance the current sensitivity. Both theory and experiment prove that the new AFCS can simultaneously overcome two prevalent obstacles of low current sensitivity and low stability