CN209459818U - A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range - Google Patents

A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range Download PDF

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CN209459818U
CN209459818U CN201920577472.1U CN201920577472U CN209459818U CN 209459818 U CN209459818 U CN 209459818U CN 201920577472 U CN201920577472 U CN 201920577472U CN 209459818 U CN209459818 U CN 209459818U
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pedestal
oil
fibre optic
calibration apparatus
frame
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吕国辉
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Heilongjiang University
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Heilongjiang University
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Abstract

A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range, it is related to a kind of calibrating installation of sensor.The utility model is in order to provide the dynamic calibration apparatus of a kind of high range, high safety, fibre optic compression sensor with high accuracy.The utility model includes pedestal, frame, the pedestal is rectangular panel body, pedestal is horizontal positioned, frame is rectangular box, the lower end of frame is fixedly connected with the upper surface of pedestal, the present apparatus further includes weight, guide pipe, hydraulic package, oil-cylinder fixer, the oil-cylinder fixer is fixedly connected with the upper surface of pedestal and oil-cylinder fixer is located in frame, hydraulic package is inlaid in oil-cylinder fixer, and it is fixedly connected with the upper surface of pedestal, guide pipe is located in frame and the lower end of guide pipe and the upper end of oil-cylinder fixer connect, lifting device and weight are from top to bottom sequentially arranged at the upper end of guide pipe.Calibrating installation of the utility model for dynamic parameters such as big pressure fibre optical sensor amplitude, pulsewidths.

Description

A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range
Technical field
The utility model relates to a kind of calibrating installations of sensor, are specifically related to a kind of adjustable fiber-optic pressure sensor of range The dynamic calibration apparatus of device.
Background technique
In recent years, piezoelectric transducer is mainly used in terms of the big pressure measurement of dynamic both at home and abroad, this electrical measurement mode is not But fast response time, and the change curve of transient pressure and time can be recorded, analysis transient physical process is played important Effect.But this piezoelectric transducer is that big pressure signal is characterized by faint charge signal, is highly prone to electromagnetism Interference is not easy teletransmission, and piezoelectric material is easy to damage under transient impact.Fibre optic compression sensor have structure it is simple, The advantages that high sensitivity, output amplitude are big, anti-interference strong, dynamic range is big, range is big, suitable for complicated rugged environment, For the high-tension measurement of 100MPa or more, relative to traditional piezoelectric pressure indicator, fibre optic compression sensor Tool has an enormous advantage.Since high-tension measurement is mainly used in some extreme testing fields, so wanting strict guarantee feeling of stress Carrier-high pressure sensor the performance requirement answered, therefore the Dynamic Calibration Technique of fibre optic compression sensor just seems particularly significant. The domestic Research on Calibration Technology about fibre optic compression sensor still belongs to blank at present, therefore there is an urgent need to fibre optic compression sensors Dynamic calibration apparatus.
Utility model content
The purpose of this utility model is to provide for a kind of high range and (refers to the school of 100MPa or more fibre optic compression sensor Quasi- range), high safety, fibre optic compression sensor with high accuracy dynamic calibration apparatus, and then it is adjustable to provide a kind of range The dynamic calibration apparatus of fibre optic compression sensor.
The technical solution of the utility model is:
A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range, it includes pedestal, frame, and the pedestal is Rectangular panel body, pedestal is horizontal positioned, and frame is rectangular box, and the lower end of frame is fixedly connected with the upper surface of pedestal, the present apparatus It further include weight, guide pipe, hydraulic package, oil-cylinder fixer, the fixed company in the upper surface of the oil-cylinder fixer and pedestal It connects and oil-cylinder fixer is located in frame, hydraulic package is inlaid in oil-cylinder fixer, and is fixed with the upper surface of pedestal Connection, guide pipe be located in frame and the lower end of guide pipe and the connection of the upper end of oil-cylinder fixer, lifting device and weight by The upper end of guide pipe is sequentially arranged under.
The utility model has the effect that compared with prior art
1, the sensor being calibrated and standard fiber pressure sensor are installed around the hydraulic cylinder 5 of the utility model, And in the case where there is pressure signal, while carrying out the acquisitions of data, storage, comparison and analyzing and generate pressure versus time song Line.By the analysis to above-mentioned data, find out the sensor that is calibrated there are the problem of, to realize to fibre optic compression sensor The dynamic parameters such as amplitude, pulsewidth calibration direction.The sensor being calibrated and standard fiber pressure sensor are acquired To data be compared, the test repeatedly and adjustment to the sensor being calibrated improve the essence for the sensor being calibrated Degree.
2, the weight drop height of the utility model is adjusted by lifting device, increases calibration range.Meanwhile weight Hammer is capable of providing the sensor being calibrated and the dynamic dynamic data of standard fiber pressure sensor under the drive of lifting device Signal, so that the data acquisition of the utility model is more flexible.
3, the frame 1 of the utility model and guide pipe 3 can guarantee weight during the test, transport along both fixed tracks It is dynamic, ensure the safety and reliability of test.
4, the utility model in actual use, is passed due to installing the sensor being calibrated and standard fiber pressure After sensor, start lifting device, only need to observe data by computer.It is simple to operate.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model;
Fig. 2 is the axis side structure schematic diagram of the utility model;
Fig. 3 is the partial enlarged view of Fig. 1;
Fig. 4 is the partial enlarged view of Fig. 3.
Specific embodiment
Specific embodiment 1: illustrating present embodiment in conjunction with Fig. 1 to Fig. 4, a kind of range of present embodiment is adjustable The dynamic calibration apparatus of fibre optic compression sensor, it includes pedestal 8, frame 1, and the pedestal 8 is rectangular panel body, and pedestal 8 is horizontal It places, frame 1 is rectangular box, and the lower end of frame 1 is fixedly connected with the upper surface of pedestal 8, it is characterised in that: the present apparatus is also wrapped Include weight 2, guide pipe 3, hydraulic package, oil-cylinder fixer 7, the fixed company in upper surface of the oil-cylinder fixer 7 and pedestal 8 It connects and oil-cylinder fixer 7 is located in frame 1, hydraulic package is inlaid in oil-cylinder fixer 7, and the upper surface with pedestal 8 It is fixedly connected, guide pipe 3 is inserted into frame 1 and the lower end of guide pipe 3 is connect with the upper end of oil-cylinder fixer 7, promotes dress Set 13 and weight 2 be from top to bottom sequentially arranged at the upper end of guide pipe 3, weight 2 can be risen by lifting device in guide pipe 3 Or it falls.Lifting device 13 is made of traction rope and pulley, indicates scale above weight rope.The middle part of frame 1 is equipped with two A frame plate, guide pipe 3 from top to bottom sequentially pass through after two partitions and in the groove on 7 top of oil-cylinder fixer.Frame 1 is to leading It plays a supporting role to pipe, fixed lifting device can also be played the role of).
When calibration, cardinal principle is that a similar semisinusoidal pressure pulse is generated using the present apparatus.On the top of hydraulic cylinder 5 Portion has one to make pressure piston 4, and installing the sensor being calibrated around hydraulic cylinder 5 (can be fibre optic compression sensor or pressure Electric-type pressure sensor) and standard fiber pressure sensor (being also possible to piezoelectric pressure indicator), the weight 2 of certain mass Certain kinetic energy is obtained by free-falling in guide pipe 3, hits make pressure piston 4 later, and compress liquid by making pressure piston 4 Hydraulic oil 6 in compressing cylinder 5 causes 6 pressure of hydraulic oil in cylinder to rise, when the kinetic energy of weight 2 is completely converted into hydraulic oil volume Compression and when the hydraulic potential energy formed, weight 2 and make pressure 4 stop motion of piston, 5 pressure reach maximum value in hydraulic cylinder.It connects Get off and push since hydraulic oil expands and make pressure piston 4 and 2 counter motion of weight, returns to position until making pressure piston 4, Pressure also falls to zero in hydraulic cylinder 5.Calibrating installation completes one action process, generates the pressure of a similar semisinusoidal type Power pulse.Standard fiber pressure sensor and the pressure sensor being calibrated incude same pressure pulse, pass through fiber grating solution Instrument 15 (when sensor is piezoelectric pressure indicator, using charge amplifier 16) is adjusted to obtain the pressure test of two sensors Data.The utility model is a kind of dynamic calibration apparatus suitable for fibre optic compression sensor, removes calibration in the utility model Outside mechanical structure, further includes fiber Bragg grating (FBG) demodulator 15, computer 17, the pressure signal of fibre optic compression sensor can be carried out Acquisition, compares and analyzes and generate pressure-time curve storage.Amplitude, arteries and veins to realization to fibre optic compression sensor The calibration of the dynamic parameters such as width.
Specific embodiment 2: it is illustrated in combination with fig. 1 and fig. 4 present embodiment, the hydraulic package packet of present embodiment It includes and makes pressure piston 4, hydraulic cylinder 5 and hydraulic oil 6, the hydraulic cylinder 5 is inlaid in oil-cylinder fixer 7, and hydraulic cylinder 5 It is fixedly connected with pedestal 8, makes pressure piston 4 and be threadedly coupled with hydraulic cylinder 5, hydraulic oil 6 is housed in hydraulic cylinder 5.So set, Oil-cylinder fixer 7 can play the role of fixed hydraulic oil cylinder 5 and protection and play the role of fixed support guide pipe 3. Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: illustrating present embodiment, the upper table of the pedestal 8 of present embodiment in conjunction with Fig. 1 and Fig. 2 Face is equipped with two sliding rails 10, and two sliding rails 10 are arranged side by side along the length direction of pedestal 8 and two sliding rails are located in frame 1 Side.So set, sliding on the slide rail convenient for left cover 9-1 and right cover 9-2, the open or close of protective cover 9 is tested.It is other Composition and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: illustrating present embodiment in conjunction with Fig. 1 to Fig. 3, the calibrating installation of present embodiment is also Including protective cover 9, protective cover 9 is sleeved on the outside of oil-cylinder fixer, and protective cover 9 is opposite by left cover 9-1 and right cover 9-2 Composition, left cover 9-1 and right cover 9-2 can do straight reciprocating, left cover 9-1 and right cover along the length direction of sliding rail 10 The medial surface on the top 9-2 has semi-circular groove, after left cover 9-1 merges with right cover 9-2, two semi-circular groove compositions one A cross section is round hole.So set, protective cover 9 can ensure the safety for participating in calibration experiments personnel.Protective cover 9 can If falling off the danger of burst caused by experimenter to avoid sensor in a high voltage state.Protective cover buckle can be by protective cover It is locked.Other compositions and connection relationship are identical as specific embodiment one, two or three.
Specific embodiment 5: illustrate present embodiment in conjunction with Fig. 1 to Fig. 3, present embodiment protective cover 9 a left side, Right two sides are respectively equipped with multiple protective cover caging bolts 11, and protective cover caging bolt 11 is fixedly connected with the upper surface of pedestal 8.Such as This setting, protective cover caging bolt 11 can play limitation to the slip locations of left cover 9-1 and right cover 9-2, avoid skidding off Pedestal 8.Other compositions and connection relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: illustrate present embodiment in conjunction with Fig. 2 and Fig. 3, the left cover 9-1 of present embodiment and When right cover 9-2 merges, connected by 12 locking of protective cover buckle.So set, protective cover buckle is for left cover 9-1 and the right side Cover 9-2 is locked when merging, and avoids high voltage transient impact from generating dangerous, and protective cover 9 can ensure that participation calibration is real Test the safety of personnel.Other compositions and connection relationship and specific embodiment one, two, three, four or five are identical.
Specific embodiment 7: illustrating present embodiment, the outside of the left cover 9-1 of present embodiment in conjunction with Fig. 2 and Fig. 3 Equipped with left handgrip 9-1-1, the outside of right cover 9-2 is equipped with right handgrip 9-2-2.So set, convenient for holding.Other compositions and company It is identical to meet relationship and specific embodiment one, two, three, four, five or six.
1, specific embodiment 8: embodiment is described with reference to Fig. 3, the calibrating installation of present embodiment further includes Two monitoring devices 14, two monitoring devices 14 are located at the inside of 1 or so two munnions of frame, and fix and connect with pedestal 8 It connects.So set, realizing real-time monitoring to sensor convenient for monitoring device 14.Monitoring device is mainly by two high-definition night-viewings Miniature webcam composition, sensor when calibration experiments can be monitored in real time in monitoring device 14 in protective cover, and picture will be monitored It is transferred to computer, experiment tester is facilitated to observe real-time status of sensor during calibration experiments.It is other composition and Connection relationship and specific embodiment one, two, three, four, five, six or seven are identical.
Specific embodiment 9: embodiment is described with reference to Fig. 1, the outer surface of the guide pipe 3 of present embodiment is equipped with Several ventholes 3-1.Other compositions and connection relationship and specific embodiment one, two, three, four, five, six, seven or eight are identical.
Specific embodiment 10: embodiment is described with reference to Fig. 1, the upper surface of the pedestal 8 of present embodiment is set There are four handgrip 8-1, four handgrip 8-1 to be uniformly mounted on the edge of 8 upper surface of pedestal.So set, convenient for holding It is mobile.Other compositions and connection relationship and specific embodiment one, two, three, four, five, six, seven, eight or nine are identical.
Working principle:
It should first be ready to test required equipment before carrying out calibration experiments:
Weight rope is calibrated fibre optic compression sensor, standard pressure transducer, fiber grating demodulation 15, monitoring dress Set 14 etc..Prepare before carrying out experiment, carries out oiling in strict accordance with hydraulic cylinder oiling step, it is ensured that air is arranged completely in oil cylinder It removes, in case there are bubbles on the raw influence of calibration in oil cylinder.By standard transducer and sensor is calibrated with dedicated torque spanner It is mounted on hydraulic cylinder, hydraulic cylinder 5 is fixed on pedestal 8, guarantee that hydraulic cylinder 5 is tightly fixed on pedestal 8.It will mark Quasi- sensor is connect with the output for being calibrated sensor with signal pickup assembly, and adjustment criteria sensor is zeroed, by each sensing Device and fiber Bragg grating (FBG) demodulator 15 (when sensor is piezoelectric pressure indicator, using charge amplifier 16) at least energization 30 Minute, it is at optimum Working.Guide pipe 3 is fixed on oil-cylinder fixer 7, with level meter detection pedestal, is adjusted It saves to level.It is whether vertical with level meter detection guide pipe 3, it is adjusted to vertical.Check again for sensor connection, it is ensured that even It connects normal;Adjust camera position, it is ensured that 14 alignment sensor of monitoring device realizes real-time monitoring.End of operation, by shield 9 closures, and protective cover buckle 12 is locked.Traction rope is connect with weight 2, weight 2 is put into guide pipe 3, by traction rope around Pulley is crossed, and traction rope tail end is tied on pedestal 1.Whether sliding traction rope, viewing pulley work are normal.It is mentioned drawing to weight Pass through the scale on observation rope during drawstring, weight 2 is placed in desired height, discharges weight 2.Pass through fiber Bragg grating (FBG) demodulator 15 (when sensor is piezoelectric pressure indicator, obtains pressure data using charge amplifier 16 and are obtained by computer 17 To the pressure-time curve of sensor.Current existing pressure sensor calibrating apparatus is all to be suitable for piezoelectric pressure indicator.

Claims (10)

1. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range, it includes pedestal (8) and frame (1), described Pedestal (8) is rectangular panel body, and pedestal (8) is horizontal positioned, and frame (1) is rectangular box, lower end and pedestal (8) of frame (1) Upper surface is fixedly connected, it is characterised in that: the present apparatus further includes the fixed dress of weight (2), guide pipe (3), hydraulic package and oil cylinder It sets (7), the oil-cylinder fixer (7) is fixedly connected with the upper surface of pedestal (8) and oil-cylinder fixer (7) is located at frame (1) in, hydraulic package is inlaid in oil-cylinder fixer (7), and is fixedly connected with the upper surface of pedestal (8), and guide pipe (3) is perpendicular Directly be mounted in frame (1) and the lower end of guide pipe (3) connect with the upper end of oil-cylinder fixer (7), lifting device (13) and Weight (2) is from top to bottom sequentially arranged at the upper end of guide pipe (3), and weight (2) can be in guide pipe (3) by lifting device (13) Interior rising or whereabouts.
2. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 1, feature exist In: the hydraulic package includes making pressure piston (4), hydraulic cylinder (5) and hydraulic oil (6), the hydraulic cylinder (5) to be inlaid in oil In cylinder fixed device (7), and hydraulic cylinder (5) is fixedly connected with pedestal (8), makes pressure piston (4) and hydraulic cylinder (5) screw thread connects It connects, hydraulic oil (6) is housed in hydraulic cylinder (5).
3. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 1, feature exist In: the upper surface of the pedestal (8) is equipped with two sliding rails (10), and two sliding rails (10) set side by side along the length direction of pedestal (8) It sets and two sliding rails (10) is located at the inside of frame (1).
4. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 1 or 3, feature Be: the calibrating installation further includes protective cover (9), and protective cover (9) is sleeved on the outside of oil-cylinder fixer (7), protective cover (9) it is formed by left cover (9-1) and right cover (9-2) are opposite, left cover (9-1) and right cover (9-2) can be along sliding rails (10) Length direction does straight reciprocating, and the medial surface on left cover (9-1) and the top right cover (9-2) has semi-circular groove, After left cover (9-1) merges with right cover (9-2), it is round hole that two semi-circular grooves, which form a cross section,.
5. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 4, feature exist In: be respectively equipped with multiple protective cover caging bolts (11) in the arranged on left and right sides of protective cover (9), protective cover caging bolt (11) with The upper surface of pedestal (8) is fixedly connected.
6. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 5, feature exist In: when the left cover (9-1) and right cover (9-2) merge, pass through protective cover buckle (12) locking connection.
7. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 6, feature exist In: the outside of the left cover (9-1) is equipped with left handgrip (9-1-1), and the outside of right cover (9-2) is equipped with right handgrip (9-2-2).
8. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 1, feature exist In: the calibrating installation further includes two monitoring devices (14), and two monitoring devices (14) are located at the inside of frame (1), And it is fixedly connected with pedestal (8).
9. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 1, feature exist In: the outer surface of the guide pipe (3) is equipped with several ventholes (3-1).
10. a kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range according to claim 1, feature exist In: the upper surface of the pedestal (8) is set there are four handgrip (8-1), and four handgrips (8-1) are uniformly mounted on pedestal (8) The edge on surface.
CN201920577472.1U 2019-04-25 2019-04-25 A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range Active CN209459818U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109946018A (en) * 2019-04-25 2019-06-28 黑龙江大学 A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range
CN112067194A (en) * 2020-09-21 2020-12-11 黑龙江大学 Device and method for dynamically calibrating optical fiber pressure sensor based on strain drop hammer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109946018A (en) * 2019-04-25 2019-06-28 黑龙江大学 A kind of dynamic calibration apparatus of the adjustable fibre optic compression sensor of range
CN112067194A (en) * 2020-09-21 2020-12-11 黑龙江大学 Device and method for dynamically calibrating optical fiber pressure sensor based on strain drop hammer

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Inventor after: Lv Guohui

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