CN111829500B - High-precision optical fiber loop looping temperature performance online detection and compensation method - Google Patents
High-precision optical fiber loop looping temperature performance online detection and compensation method Download PDFInfo
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- CN111829500B CN111829500B CN202010571842.8A CN202010571842A CN111829500B CN 111829500 B CN111829500 B CN 111829500B CN 202010571842 A CN202010571842 A CN 202010571842A CN 111829500 B CN111829500 B CN 111829500B
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
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- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to a high-precision optical fiber loop looping temperature performance online detection and compensation method, which comprises the following steps: s1, heating a part of wound optical fiber loops in the process of winding the optical fiber loops into rings; heating an optical fiber ring adopting a glue-pouring winding scheme by adopting a contact heating mode; heating the optical fiber ring by adopting a tape winding scheme in a non-contact heating mode; s2, detecting the temperature performance of the optical fiber loop in the winding process by using an optical fiber loop temperature error detection system, and measuring and recording the temperature error of the optical fiber loop; and S3, determining to re-wind or further wind the next winding part according to the measured temperature error, and performing reverse compensation operation by using a method for adjusting the winding length of the optical fiber loops on two sides. The method realizes the detection and compensation of the temperature performance of the optical fiber ring in the winding process, greatly improves the temperature performance of the optical fiber ring, and greatly improves the yield of the optical fiber ring.
Description
Technical Field
The invention belongs to the technical field of high-precision optical fiber loop winding production for a high-precision optical fiber gyroscope, and particularly relates to an online detection and compensation method for loop forming temperature performance of a high-precision optical fiber loop.
Background
The fiber optic gyroscope, as a novel optical gyroscope instrument, has the advantages of high reliability, impact vibration resistance, long service life, high starting speed and the like, and is widely applied to a plurality of military and civil fields. However, when the temperature of the operating environment of the fiber optic gyroscope changes, thermally induced non-reciprocal phase noise, i.e., a SHUPE error, is generated in the fiber optic ring sensor (for short, a fiber optic ring) which is a core component of the fiber optic gyroscope. The error cannot be distinguished from the SAGNAC effect of sensing the earth rotation speed by the fiber-optic gyroscope, and the actual detection precision of the fiber-optic gyroscope is seriously reduced. The high-precision optical fiber ring has high looping difficulty, long winding period and high cost. In the process of winding the ring, due to the actual existence of non-ideal factors such as fiber diameter error, winding stress error, optical fiber arrangement error and the like of the optical fiber, the temperature performance of the optical fiber ring is greatly influenced. The existing optical fiber ring temperature performance detection is carried out after ring formation and solidification, although the ring temperature performance can be visually tested to guide the subsequent ring winding process improvement, the detection belongs to the field of finished product detection. If real-time index detection can be carried out in the winding and looping process, the loop winding is guided in time, and the temperature performance is compensated online, so that the loop looping efficiency can be greatly improved, the development period is shortened, and the winding cost is reduced. The on-line detection needs to perform heating operation on the optical fiber ring in the winding process, and it is necessary to ensure that the operation does not affect the process links such as later curing of the optical fiber ring, so that different heating schemes need to be designed for the optical fiber ring adopting the glue filling scheme and the optical fiber ring adopting the glue winding scheme for testing.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the high-precision online detection and compensation method for the ring-forming temperature performance of the optical fiber ring, which can greatly improve the temperature performance of the optical fiber ring and the yield of the optical fiber ring.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-precision optical fiber loop looping temperature performance online detection and compensation method is characterized by comprising the following steps:
s1, firstly, winding an optical fiber ring, and heating a part of the wound optical fiber ring in the process of winding the optical fiber ring into a ring; heating an optical fiber ring adopting a glue-pouring winding scheme by adopting a contact heating mode; heating the optical fiber ring by adopting a tape winding scheme in a non-contact heating mode;
s2, detecting the temperature performance of the optical fiber loop in the winding process by using an optical fiber loop temperature error detection system, and measuring and recording the temperature error of the optical fiber loop;
and S3, according to the measured temperature error, determining to re-wind or performing reverse compensation operation on the next winding part by using a method for adjusting the winding length of the optical fiber loops on two sides.
Further: in S1: the contact heating mode is realized by uniformly wrapping the heating belt on the outer side of the optical fiber ring to heat the optical fiber ring; the non-contact heating mode is realized by placing a non-contact optical fiber ring heating device consisting of two semi-circular devices outside the optical fiber ring to heat the optical fiber ring.
Further: in S2, the temperature performance detection points are set as follows: and performing online temperature performance detection once every 4 layers of winding is completed.
And further: s3 comprises two sub-steps:
s31, setting a compensation basis: collecting data, and establishing a compensation criterion table, wherein the table establishing process comprises the following steps: winding optical fiber loops with the same number of layers and the same number of turns, carrying out online heating and temperature performance detection once for every 4 layers, collecting all data, then taking 4 values with the minimum temperature error in each test, using the median of the 4 values as the reference value of the test result, and forming a compensation reference value query table by the reference value of each test;
s32, implementing reverse compensation: when a subsequent new ring is wound, the corresponding lookup table compares the actually measured temperature error with the reference value in the table, and if the measured value is 30% or more larger than the reference value, the measured value needs to be compensated in 4 layers wound later; if the measured value reaches more than 200% of the reference value, 4 layers of optical fibers which are wound need to be removed, and the optical fibers are rewound.
Further, the method comprises the following steps: s32 compensates according to the following seven cases:
1) When the test actual value is compared with the reference value, the symbol is the same, and the absolute value is less than 130% of the reference value, no compensation is needed;
2) When the tested actual value is compared with the reference value, the symbol is the same, when the reference value is more than or equal to 130% and less than or equal to 150% of the actual test value, and when the next 4 layers are wound, and the second layer and the third layer are wound, a half-turn optical fiber is wound;
3) When the tested actual value is compared with the reference value, the symbol is the same, when the reference value is more than or equal to 150% and less than 200% of the actual test value, when the next 4 layers are wound, and when the second layer and the third layer are wound, a turn of optical fiber is wound;
4) When the test actual value is compared with the reference value, the sign is opposite, and the absolute value is less than 130% of the reference value, no compensation is needed;
5) When the tested actual value is compared with the reference value, the sign is opposite, the absolute value of the reference value is more than or equal to 130% and less than or equal to 150% of the reference value, and when 4 layers are wound, and a first layer and a fourth layer are wound, a half-turn optical fiber is wound more than or equal to each other;
6) When the tested actual value is compared with the reference value, the sign is opposite, the absolute value of the reference value is more than or equal to 150% and less than 200% of the actual test value, and when 4 layers are wound, a turn of optical fiber is wound more than once when a first layer and a fourth layer are wound;
7) When the absolute value of the measured value is larger than or equal to 200% of the reference value when the measured actual value is compared with the reference value, 4 layers of wound materials need to be removed, and re-winding is carried out.
The invention has the advantages and positive effects that:
the method comprises the steps of firstly designing different heating modes for the optical fiber ring adopting a glue filling scheme and the optical fiber ring adopting a glue winding scheme in the high-precision optical fiber ring winding process, then detecting the temperature performance by using the built optical fiber ring temperature performance testing system, and if the temperature performance is found to be abnormal, compensating the temperature performance by using a method for adjusting the winding length of the optical fiber rings on two sides in the subsequent winding process. The method is different from the conventional temperature performance test of the whole optical fiber loop, realizes the detection and compensation of the temperature performance of the optical fiber loop in the winding process, greatly improves the temperature performance of the optical fiber loop, and greatly improves the yield of the optical fiber loop.
Drawings
FIG. 1 is a schematic view of a looping process of an optical fiber loop of the present invention;
FIG. 2 is a schematic diagram of the present invention showing contact heating of a fiber optic ferrule using a potting solution;
FIG. 3 is a schematic diagram of the present invention employing non-contact heating of a fiber optic loop wound with tape glue (UV glue);
FIG. 4 is a schematic diagram of an online detection and compensation system for temperature performance of an optical fiber loop according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention is not limited thereto.
The invention provides a high-precision optical fiber loop temperature performance online detection and compensation method for an optical fiber gyroscope, which can greatly improve the temperature performance and the yield of an optical fiber loop.
In a fiber loop, a long length of optical fiber 100 is wound into a multi-layer coil, wherein each layer of the wound loop is made up of several turns of optical fiber. The optical fiber loop is typically wound from the midpoint of the fiber and the winding is done on a dedicated fiber looping machine, which is schematically illustrated in fig. 1. In fig. 1, the optical fiber ring is placed on a winding tool 2 of a winding machine, the section of optical fiber is wound from a middle point 101, and optical fibers with the same length on the left side and the right side of the optical fiber ring are respectively placed on a left fiber supply disc 1 and a right fiber supply disc 3.
Firstly, in the process of winding the optical fiber ring into a ring, heating a part of the wound optical fiber ring, wherein the optical fiber rings of different manufacturers may adopt a glue filling scheme or a glue winding scheme, so that the optical fiber rings of the two glue applying schemes need to be designed respectively, and a contact type heating mode is designed for the optical fiber ring adopting the glue filling winding scheme for heating, and the mode has the advantages of low cost, high efficiency and high realizability, and the schematic diagram is shown in fig. 2. In fig. 2, for the optical fiber loop of the glue filling scheme, heating is performed during contact, and the heating tape 4 is uniformly wrapped outside the optical fiber loop to heat the optical fiber loop, wherein the heating rate is ensured to be consistent when acceleration is performed each time.
Once the contact heating method is adopted, the optical fiber loop adopting the winding scheme with glue can certainly damage the glue carried in the winding process of the optical fiber loop, so a non-contact heating method needs to be designed, as shown in fig. 3. In fig. 3, a non-contact optical fiber loop heating device 5 (e.g., a non-contact heating tape) composed of two semicircular devices is placed on the outside of the loop for the optical fiber loop wound with glue to heat the optical fiber loop. The method can solve the problem of non-contact heating, but has low efficiency and high cost, and in addition, only the optical fiber ring which adopts ultraviolet curing glue can be detected, if the ultraviolet curing glue is used for curing, a glue filling scheme is recommended and a contact method is adopted for heating the ring.
The temperature performance of the optical fiber loop during the winding process is then detected by using an optical fiber loop temperature error detection system, which has been mentioned in various articles of many authors (for example, research on temperature error of optical fiber gyroscope and its suppression method, thesis filed by studios, wangze, tianjin university, 2012), but is not an innovation point, and is not described herein. And a high-precision multi-polarization winding process (four-pole winding, eight-pole winding, sixteen-pole winding and the like) of the optical fiber ring is combined. The temperature performance detection point settings are specified as follows: and (3) once online temperature performance detection can be carried out every time 4 layers are wound, the temperature error of the winding is recorded after every detection, and then reverse compensation operation is carried out on the winding in 4 layers of the next winding. The schematic diagram of the whole optical fiber loop temperature performance online detection and compensation system is shown in fig. 4.
The criterion to be compensated is defined here as follows: firstly, data collection is carried out, and because the stress value of a winding ring of each unit and the optical fiber arrangement scheme have great difference, each winding unit needs to establish a compensation criterion table. The table building process is as follows: winding optical fiber loops with the same number of layers and the same number of turns, carrying out online heating and temperature performance detection once every 4 wound layers, collecting all data, then taking 4 values with the minimum temperature error in each test, and taking the median of the 4 values as the reference value of the test result. And composing the reference value of each test into a compensation reference value lookup table.
When a new subsequent ring is wound, the corresponding lookup table compares the actually measured temperature error with the reference value in the table, and if the measured value is 30% or more larger than the reference value, the measured value needs to be compensated in 4 layers wound later. If the measured value reaches more than 200% of the reference value, the 4 layers of the optical fibers which are wound are required to be removed, and the optical fibers are rewound.
The compensation method is specified here as follows:
1) When the test actual value is compared with the reference value, the symbol is the same, and the absolute value is less than 130% of the reference value, no compensation is needed;
2) When the tested actual value is compared with the reference value, the symbol is the same, 130% of the reference value is more than or equal to 150% of the actual test value, and when the next 4 layers are wound, and the second layer and the third layer are wound, a half-turn optical fiber is wound for multiple times;
3) When the tested actual value is compared with the reference value, the symbol is the same, when the reference value is more than or equal to 150% and less than or equal to 200% and the actual test value is less than or equal to 200%, when the next 4 layers are wound, when the second layer and the third layer are wound, more than one turn of optical fiber is wound:
4) When the test actual value is compared with the reference value with the opposite sign and the absolute value is less than 130% of the reference value, no compensation is needed.
5) When the tested actual value is compared with the reference value, the sign is opposite, the absolute value of the actual test value is more than or equal to 130% of the reference value and less than or equal to 150% of the reference value, and when the next 4 layers are wound, and the first layer and the fourth layer are wound, the half-turn optical fiber is wound for a plurality of times;
6) When the tested actual value is compared with the reference value, the sign is opposite, the absolute value of the reference value is more than or equal to 150% and less than 200% of the actual test value, and when the next 4 layers are wound, a turn of optical fiber is wound when the first layer and the fourth layer are wound;
7) When the absolute value of the measured value is larger than or equal to 200% of the reference value when the measured actual value is compared with the reference value, 4 layers of wound materials need to be removed, and re-winding is carried out.
Although the embodiments and figures of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and figures.
Claims (3)
1. A high-precision optical fiber loop looping temperature performance online detection and compensation method is characterized by comprising the following steps:
s1, firstly, winding an optical fiber ring, and heating a part of the wound optical fiber ring in the process of winding the optical fiber ring into a ring; heating an optical fiber ring adopting a glue-pouring winding scheme by adopting a contact heating mode; heating the optical fiber ring by adopting a glue winding scheme in a non-contact heating mode;
s2, detecting the temperature performance of the optical fiber loop in the winding process by using an optical fiber loop temperature error detection system, and measuring and recording the temperature error of the optical fiber loop;
s3, according to the measured temperature error, determining to re-wind or performing reverse compensation operation on the next winding part by using a method for adjusting the winding length of the optical fiber loops on two sides;
in S2, the temperature performance detection points are set as follows: performing online temperature performance detection once every 4 layers of winding is completed;
s3 comprises two dividing steps:
s31, setting a compensation basis: collecting data, and establishing a compensation criterion table, wherein the table establishing process comprises the following steps: winding optical fiber loops with the same number of layers and the same number of turns, carrying out online heating and temperature performance detection once for every 4 layers, collecting all data, then taking 4 values with the minimum temperature error in each test, using the median of the 4 values as the reference value of the test result, and forming a compensation reference value query table by the reference value of each test;
s32, implementing reverse compensation: when a subsequent new ring is wound, the corresponding lookup table compares the actually measured temperature error with the reference value in the table, and if the measured value is 30% or more larger than the reference value, the measured value needs to be compensated in 4 layers wound later; if the measured value reaches more than 200% of the reference value, 4 layers of optical fibers which are wound need to be removed, and the optical fibers are rewound.
2. The method for detecting and compensating the looping temperature performance of the high-precision optical fiber loop in the online manner according to claim 1, wherein the method comprises the following steps: in S1: the contact heating mode is realized by uniformly wrapping the heating belt on the outer side of the optical fiber ring to heat the optical fiber ring; the non-contact heating mode is realized by placing a non-contact optical fiber ring heating device consisting of two semi-circular devices outside the optical fiber ring to heat the optical fiber ring.
3. The method for detecting and compensating the looping temperature performance of the high-precision optical fiber loop in the online manner according to claim 1, wherein the method comprises the following steps:
s32 compensates according to the following seven cases:
1) When the test actual value is compared with the reference value, the symbol is the same, and the absolute value is less than 130% of the reference value, no compensation is needed;
2) When the tested actual value is compared with the reference value, the symbol is the same, when the reference value is more than or equal to 130% and less than or equal to 150% of the actual test value, and when the next 4 layers are wound, and the second layer and the third layer are wound, a half-turn optical fiber is wound;
3) When the tested actual value is compared with the reference value, the symbol is the same, when the reference value is more than or equal to 150% and less than or equal to 200% and the actual test value is less than or equal to 200%, when the next 4 layers are wound, when the second layer and the third layer are wound, more than one turn of optical fiber is wound:
4) When the test actual value is compared with the reference value, the sign is opposite, and the absolute value is less than 130% of the reference value, no compensation is needed;
5) When the tested actual value is compared with the reference value, the sign is opposite, the absolute value of the actual test value is more than or equal to 130% of the reference value and less than or equal to 150% of the reference value, and when the next 4 layers are wound, and the first layer and the fourth layer are wound, the half-turn optical fiber is wound for a plurality of times;
6) When the tested actual value is compared with the reference value, the sign is opposite, the absolute value of the reference value is more than or equal to 150% and less than 200% of the actual test value, and when the next 4 layers are wound, a turn of optical fiber is wound when the first layer and the fourth layer are wound;
7) When the absolute value of the measured value is larger than or equal to 200% of the reference value when the measured actual value is compared with the reference value, 4 layers of wound materials need to be removed, and re-winding is carried out.
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