CN109357607B - Full-automatic vibrating wire type strain sensor calibration device - Google Patents
Full-automatic vibrating wire type strain sensor calibration device Download PDFInfo
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- CN109357607B CN109357607B CN201811453146.6A CN201811453146A CN109357607B CN 109357607 B CN109357607 B CN 109357607B CN 201811453146 A CN201811453146 A CN 201811453146A CN 109357607 B CN109357607 B CN 109357607B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a full-automatic vibrating wire type strain sensor calibration device, which comprises a base, wherein a left fixing seat is fixed at the left end of the base, a right fixing seat is fixed at the right end of the base, a guide sliding rod is fixed between the left fixing seat and the right fixing seat, a power screw rod is rotationally connected between the left fixing seat and the right fixing seat, a left clamp and a right clamp are arranged between the left fixing seat and the right fixing seat, the left clamp is sleeved on the left half part of the guide sliding rod and the power screw rod, is in sliding connection with the guide sliding rod and is in threaded transmission connection with the power screw rod, the right clamp is sleeved on the right half part of the guide sliding rod and the power screw rod, is in sliding connection with the power screw rod, is propped against or is fixedly connected with the right fixing seat, and is matched with the right clamp to fix a vibrating wire type strain sensor; therefore, the device realizes the full-automatic calibration of the vibrating wire strain sensor, the vibrating wire displacement meter and the vibrating wire type seam meter.
Description
Technical Field
The invention belongs to the technical field of metering calibration equipment, and particularly relates to a full-automatic vibrating wire type strain sensor calibration device.
Background
The vibrating wire type strain sensor is an advanced sensor in the current stress strain measurement, the sensor outputs frequency instead of voltage, and the sensor can not cause obvious attenuation of signals due to the change of wire resistance and temperature fluctuation, has the advantages of simple structure, high precision, strong anti-interference capability, long signal transmission distance, good long-term stability and the like, can be applied to severe environments such as low temperature, high temperature and high radiation, and is widely applied to safety pre-warning and safety detection in the fields such as dams, bridges, large buildings, subways, ship building, mines, coal mines, foundation pits, water conservancy and hydropower, petrochemical industry, nuclear power stations and the like.
Aiming at the vibrating wire type strain sensor, the national formulates general technical conditions of the vibrating wire type strain sensor of the geotechnical test instrument geotechnical engineering instrument of GB/T13606-2007 and the calibration standard of the JJF 1305-2011 linear displacement sensor, and provides the technical requirements and the calibration method of the basic error and the linearity of the vibrating wire type strain sensor, but does not specify which standard instrument is adopted to ensure the accurate and reliable magnitude, and does not specify a unified calibration method and device. In recent years, the domestic part of the mechanism designs a calibration device according to the specification, for example, a chinese patent CN101738157a discloses a vibrating wire type strain sensor calibration device, which is mainly of a purely mechanical structure, uses a dial indicator to perform measurement, and mainly has the problems of high calibration labor intensity, low calibration efficiency and difficulty in obtaining repeatability errors. Chinese patent CN107621222a discloses a vibrating wire strain gauge calibration device, which measures the tiny length variation during the calibration process, but has a significant influence on the calibration result due to the sliding problem of the clamping part of the sensor; when calibrating a wide-range vibrating wire sensor, the device can deform, and the rigidity of the device cannot meet the calibration requirement.
Disclosure of Invention
The invention aims to provide a full-automatic vibrating wire type strain sensor calibration device; the technical scheme adopted for achieving the purpose is as follows:
The full-automatic vibrating wire type strain sensor calibration device comprises a base, a left fixing seat is fixed at the left end of the base, a right fixing seat is fixed at the right end of the base, a guide sliding rod is fixed between the left fixing seat and the right fixing seat, a power screw rod is rotationally connected between the left fixing seat and the right fixing seat, a left clamp and a right clamp are arranged between the left fixing seat and the right fixing seat in a sleeved mode, the left clamp is slidably connected with the guide sliding rod and is in threaded transmission connection with the power screw rod, the right clamp is sleeved on the right half of the guide sliding rod and the power screw rod and is slidably connected with the power screw rod, the right clamp is propped against or fixedly connected with the right fixing seat, and the left clamp and the right clamp are matched to fix the vibrating wire type strain sensor;
The left end of the base is fixed with a servo motor for driving the power screw to rotate, the base is fixed with a grating displacement sensor for detecting the displacement of the left clamp, and the grating displacement sensor and the servo motor form closed-loop control.
Preferably, the right clamp is in sliding connection with the guide slide rod and the power screw rod, and the right clamp is fixedly connected with the right fixing seat through the S-shaped tension pressure sensor.
Preferably, the left clamp comprises a left slider, the left slider is sleeved on the left half part of the guide slide bar and the power screw, the left slider is in sliding connection with the guide slide bar and in threaded transmission connection with the power screw, and a left clamping head is fixed on the left slider; the right clamp comprises a right sliding block, the right sliding block is sleeved on the right half part of the guide sliding rod and the power screw rod, the right sliding block is in sliding connection with the guide sliding rod and the power screw rod, two ends of the S-shaped tension pressure sensor are respectively fixed on the right sliding block and the right fixing seat, a right clamping head is fixed on the right sliding block, and the left clamping head and the right clamping head are matched to fix the vibrating wire type strain sensor.
Preferably, a left positioning groove is formed in the bottom of the left clamping head, a left mounting perforation is formed beside the left positioning groove, a left positioning bulge corresponding to the left positioning groove is formed on the left sliding block, and a left fixing threaded hole corresponding to the left mounting perforation is formed beside the left positioning bulge; the bottom of the right clamping head is provided with a right positioning groove, a right mounting perforation is arranged beside the right positioning groove, a right positioning bulge corresponding to the right positioning groove is arranged on the right sliding block, and a right fixing threaded hole corresponding to the right mounting perforation is arranged beside the right positioning bulge.
Preferably, a left displacement sensor is fixed on the left sliding block, and the left displacement sensor is positioned at the left side of the left clamping head; a right displacement sensor is fixed on the right sliding block and is positioned on the right side of the right clamping head; the left displacement sensor and the right displacement sensor are matched to detect the left and right sliding quantity of the vibrating wire type strain sensor.
Preferably, a fixed table is fixed on the left sliding block, a sliding table is connected on the fixed table in a sliding way along the left-right direction, a fastening bolt for fixing the sliding table is arranged on the sliding table, and a left clamping seat for fixing a left displacement sensor is fixed on the top of the sliding table; a right clamping seat for fixing the right displacement sensor is fixed on the right sliding block.
Preferably, a main scale mark is arranged on the fixed table, a vernier scale mark is arranged on the sliding table, and the fixed table and the sliding table form a vernier caliper structure.
Preferably, the top of the sliding table is provided with mounting holes distributed in a matrix, and the left clamping seat is fixed at different positions on the top of the sliding table through different mounting holes.
Preferably, the left clamping seat is provided with a plurality of left clamping holes for fixing the left displacement sensor, and the right clamping seat is provided with a plurality of right clamping holes for fixing the right displacement sensor.
Preferably, the left sliding block and the right sliding block are arranged on the guide sliding bars and the power screw in a suspending way, the number of the guide sliding bars is three, two of the guide sliding bars are respectively positioned at two sides of the power screw, and the third guide sliding bar is positioned below the power screw.
The invention has the beneficial effects that: (1) The grating displacement sensor and the servo motor form closed-loop control, so that the accuracy of displacement variation is ensured, and the magnitude of calibration parameters is improved; (2) The sliding quantity of the left end and the right end of the vibrating wire type strain sensor is detected through the left displacement sensor and the right displacement sensor, so that the measurement accuracy is improved, and the stressed change condition can be detected in real time; (3) The left displacement sensor realizes the functions of coarse adjustment and fine adjustment through the cooperation of the fixed table and the sliding table; (4) The measured displacement amounts of the left displacement sensor, the right displacement sensor and the grating displacement sensor are in the same direction, so that Abbe errors caused by mechanism deformation are reduced; (5) The invention realizes the full-automatic calibration of the vibrating wire strain sensor, the vibrating wire displacement meter and the vibrating wire seam meter, and accords with the national standard of computing method of main static performance index of GB/T18459-2001 sensor, general technical condition of the vibrating wire sensor of geotechnical test instrument of GB/T13606-2007 and calibration specification of the JJF 1305-2011 linear displacement sensor; (6) The guide slide bars are arranged in three, two of the guide slide bars are respectively positioned at two sides of the power screw, and the third guide slide bar is positioned below the power screw, so that the strength requirement on the base is reduced, common cast iron is adopted, and the manufacturing cost is reduced; meanwhile, the motion stability of the left sliding block and the right sliding block is guaranteed, and the measurement accuracy is improved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is an enlarged view of the structure of the left clamp;
FIG. 3 is an enlarged view of the structure of the right clamp;
Fig. 4 is a schematic diagram of a package structure according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, a full-automatic vibrating wire type strain sensor calibration device comprises a base 8, a left fixing seat 9 is fixed at the left end of the base 8, a right fixing seat 6 is fixed at the right end of the base 8, a guide sliding rod 4 is fixed between the left fixing seat 9 and the right fixing seat 6, a power lead screw 3 is rotationally connected between the left fixing seat 9 and the right fixing seat 6, a left clamp 1 and a right clamp 5 are arranged between the left fixing seat 9 and the right fixing seat 6, the left clamp 1 is sleeved on the left half part of the guide sliding rod 4 and the power lead screw 3, the left clamp 1 is in sliding connection with the guide sliding rod 4 and in threaded transmission connection with the power lead screw 3, the right clamp 5 is sleeved on the right half part of the guide sliding rod 4 and the power lead screw 3, the right clamp 5 is in propping up or being fixedly connected with the right fixing seat 6, and the left clamp 1 and the right clamp 5 are matched to fix a vibrating wire type strain sensor;
A servo motor 12 for driving the power screw 3 to rotate is fixed at the left end of the base 8, the servo motor 12 is in transmission connection with the power screw 3 through a speed reducer 11, a grating displacement sensor 15 for detecting the displacement of the left clamp 1 is fixed on the base 8, and the grating displacement sensor 15 and the servo motor 12 form closed-loop control. The typical grating displacement sensor 15 mainly comprises a light source, a photocell, a grating ruler, a reading head, a sealing strip and the like, and when in use, the reading head can be fixed on the left clamp 1, the grating ruler is fixed on the base 8, and the grating ruler is positioned under the reading head and is arranged along the movement track of the reading head.
In order to measure the displacement of the vibrating wire type strain sensor and detect the stress applied to the vibrating wire type strain sensor, the right clamp 5 is in sliding connection with the guide sliding rod 4 and the power screw rod 3, and the right clamp 5 is fixedly connected with the right fixing seat 6 through the S-shaped tension pressure sensor 504.
Specifically, the left clamp 1 comprises a left slider 104, the left slider 104 is sleeved on the left half part of the guide slide bar 4 and the power screw 3, the left slider 104 is in sliding connection with the guide slide bar 4 and in threaded transmission connection with the power screw 3, and a left clamping head 103 is fixed on the left slider 104; the right clamp 5 comprises a right slider 505, the right slider 505 is sleeved on the right half part of the guide slide rod 4 and the power screw 3, the right slider 505 is in sliding connection with the guide slide rod 4 and the power screw 3, two ends of the S-shaped tension pressure sensor 504 are respectively fixed on the right slider 505 and the right fixing seat 6, a right clamping head 501 is fixed on the right slider 502, and the left clamping head 103 and the right clamping head 501 are matched to fix the vibrating wire type strain sensor.
According to vibrating wire strain sensors with different specifications and models, a plurality of sets of clamping heads can be correspondingly manufactured, each set of clamping head comprises a left clamping head 103 and a right clamping head 501, anti-skidding patterns are arranged in clamping holes of the left clamping head 103 and the right clamping head 501, a left positioning groove is formed in the bottom of the left clamping head 103 for facilitating quick replacement and accurate positioning, left mounting through holes are formed beside the left positioning groove, left positioning protrusions corresponding to the left positioning grooves are formed on the left sliding block 104, and left fixing threaded holes corresponding to the left mounting through holes are formed beside the left positioning protrusions; a right positioning groove is arranged at the bottom of the right clamping head 501, a right mounting perforation is arranged beside the right positioning groove, a right positioning bulge corresponding to the right positioning groove is arranged on the right sliding block 505, and a right fixing threaded hole corresponding to the right mounting perforation is arranged beside the right positioning bulge.
As shown in fig. 2 and 3, a fixed table 108 is fixed to the left slider 104, a slide table 109 is slidably connected to the fixed table 108 in the left-right direction, a fastening bolt (not shown in the back view) for fixing the slide table 109 is provided to the slide table 109, a left clamp seat 102 for fixing the left displacement sensor 101 is fixed to the top of the slide table 109, and the left displacement sensor 101 is positioned on the left side of the left clamp head 103; a right clamping seat 502 for fixing a right displacement sensor 503 is fixed on the right slider 505, the right displacement sensor 503 is located on the right side of the right clamping head 501, and the left displacement sensor 101 and the right displacement sensor 503 are matched to detect the left-right sliding amount of the vibrating wire strain sensor.
Meanwhile, a main scale mark 106 is arranged on the fixed table 108, a vernier scale mark 105 is arranged on the sliding table 109, and the fixed table 108 and the sliding table 109 form a vernier caliper structure. The top of the sliding table 109 is provided with mounting holes 1010 distributed in a matrix, and the left clamping seat 102 is fixed at different positions at the top of the sliding table 109 through different mounting holes 1010, so that the left displacement sensor 101 can perform coarse adjustment and fine adjustment with high accuracy at a large distance for vibrating wire type strain sensors with different specifications.
On the other hand, the left clamping seat 102 is provided with a plurality of left clamping holes for fixing the left displacement sensor 101, and the right clamping seat 502 is provided with a plurality of right clamping holes for fixing the right displacement sensor 503.
In order to ensure stability in the moving process, the left slider 104 and the right left slider 505 are suspended on the guide slide bars 4 and the power screw 3, two of the guide slide bars 4 are respectively positioned at two sides of the power screw 3, and the third guide slide bar 4 is positioned below the power screw 3.
As shown in fig. 4, a casing cover 14 is assembled on the bottom plate 8, an opening for exposing a calibration area of the vibrating wire strain sensor is arranged on the casing cover 14, leveling support legs 10 are arranged at four corners of the bottom plate 8, lifting handles 7 are arranged at two sides of the bottom plate 8, and a fast-slow-forward switch 13 for controlling the movement speed of the servo motor 12 is also arranged.
When the vibrating wire type strain sensor is used, firstly, a proper left clamping head 103 and right clamping head 501 are selected according to the specification and model of the vibrating wire type strain sensor to be calibrated, and are respectively fixed on a left sliding block 104 and a right sliding block 505, and then two ends of the vibrating wire type strain sensor are respectively fixed on the left clamping head 103 and the right clamping head 501; adjusting the right displacement sensor 503 to detect the right end face displacement of the vibrating wire type strain sensor, and zeroing the reading; the left displacement sensor 101 is adjusted by adjusting the mounting position of the left clamping seat 102 on the sliding table 109 and the micro-movement of the sliding table 109 so as to detect the left end face displacement of the vibrating wire strain sensor, and the reading is zeroed; then, the servo motor 12 is started to drive the power screw 3 to slowly rotate, so that the left slider 104 is driven to move rightwards, the grating displacement sensor detects the displacement in the moving process, the S-shaped tension pressure sensor 504 detects the stress value, and according to the displacement data, the required calibration parameters can be evaluated by combining the related measurement data of the vibrating wire type strain sensor.
In order to avoid damage to the instrument caused by rightward movement of the left slider 104 in the measuring process, the base 8 is provided with limit switches 2, one of the limit switches 2, for example, the left limit switch 2, can be fixed on the base 8, and the other limit switch 2 can be detachably fixed on the base 8, so that the position of the other limit switch 2 can be adaptively adjusted according to the measuring range of the vibrating wire type strain sensor to be calibrated. Further, the other limit switch 2 may be fixed to the base 8 by means of a magnetic attraction force by means of a magnetic seat.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The full-automatic vibrating wire type strain sensor calibration device is characterized by comprising a base, a left fixing seat is fixed at the left end of the base, a right fixing seat is fixed at the right end of the base, a guide sliding rod is fixed between the left fixing seat and the right fixing seat, a power screw rod is rotationally connected between the left fixing seat and the right fixing seat, a left clamp and a right clamp are arranged between the left fixing seat and the right fixing seat in a sleeved mode, the left clamp is slidably connected with the guide sliding rod and is in threaded transmission connection with the power screw rod, the right clamp is sleeved on the right half of the guide sliding rod and the power screw rod and is slidably connected with the power screw rod, the right clamp is propped against or fixedly connected with the right fixing seat, and the left clamp and the right clamp are matched to fix the vibrating wire type strain sensor;
a servo motor for driving the power screw rod to rotate is fixed at the left end of the base, a grating displacement sensor for detecting the displacement of the left clamp is fixed on the base, and the grating displacement sensor and the servo motor form closed-loop control;
the right clamp is in sliding connection with the guide sliding rod and the power screw rod, and is fixedly connected with the right fixing seat through an S-shaped tension pressure sensor;
The left clamp comprises a left sliding block, the left sliding block is sleeved on the left half part of the guide sliding rod and the power screw rod, the left sliding block is in sliding connection with the guide sliding rod and in threaded transmission connection with the power screw rod, and a left clamping head is fixed on the left sliding block; the right clamp comprises a right sliding block, the right sliding block is sleeved on the right half part of the guide sliding rod and the power screw rod, the right sliding block is in sliding connection with the guide sliding rod and the power screw rod, two ends of the S-shaped tension pressure sensor are respectively fixed on the right sliding block and the right fixing seat, a right clamping head is fixed on the right sliding block, and the left clamping head and the right clamping head are matched to fix the vibrating wire type strain sensor;
The bottom of the left clamping head is provided with a left positioning groove, a left mounting perforation is arranged beside the left positioning groove, a left positioning bulge corresponding to the left positioning groove is arranged on the left sliding block, and a left fixing threaded hole corresponding to the left mounting perforation is arranged beside the left positioning bulge; a right locating groove is formed in the bottom of the right clamping head, a right mounting perforation is formed beside the right locating groove, a right locating bulge corresponding to the right locating groove is formed on the right sliding block, and a right fixing threaded hole corresponding to the right mounting perforation is formed beside the right locating bulge;
A left displacement sensor is fixed on the left sliding block and is positioned at the left side of the left clamping head; a right displacement sensor is fixed on the right sliding block and is positioned on the right side of the right clamping head; the left displacement sensor and the right displacement sensor are matched to detect the left and right sliding quantity of the vibrating wire type strain sensor.
2. The full-automatic vibrating wire type strain sensor calibration device according to claim 1, wherein a fixed table is fixed on the left sliding block, a sliding table is connected on the fixed table in a sliding manner along the left-right direction, a fastening bolt for fixing the sliding table is arranged on the sliding table, and a left clamping seat for fixing a left displacement sensor is fixed on the top of the sliding table; a right clamping seat for fixing the right displacement sensor is fixed on the right sliding block.
3. The full-automatic vibrating wire type strain sensor calibration device according to claim 2, wherein main scale graduation marks are arranged on the fixed table, vernier scale graduation marks are arranged on the sliding table, and the fixed table and the sliding table form a vernier caliper structure.
4. The full-automatic vibrating wire type strain sensor calibration device according to claim 2, wherein mounting holes distributed in a matrix form are formed in the top of the sliding table, and the left clamping seat is fixed at different positions on the top of the sliding table through different mounting holes.
5. The full-automatic vibrating wire type strain sensor calibration device according to claim 2, wherein the left clamping seat is provided with a plurality of left clamping holes for fixing a left displacement sensor, and the right clamping seat is provided with a plurality of right clamping holes for fixing a right displacement sensor.
6. The full-automatic vibrating wire type strain sensor calibration device according to claim 2, wherein the left sliding block and the right sliding block are arranged on the guide sliding bars and the power screw in a suspending mode, the number of the guide sliding bars is three, two guide sliding bars are respectively located on two sides of the power screw, and the third guide sliding bar is located below the power screw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811453146.6A CN109357607B (en) | 2018-11-30 | 2018-11-30 | Full-automatic vibrating wire type strain sensor calibration device |
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| CN201811453146.6A CN109357607B (en) | 2018-11-30 | 2018-11-30 | Full-automatic vibrating wire type strain sensor calibration device |
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| CN109357607A CN109357607A (en) | 2019-02-19 |
| CN109357607B true CN109357607B (en) | 2024-04-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111288940A (en) * | 2020-03-07 | 2020-06-16 | 中国计量科学研究院 | Automatic vibrating wire strain sensor calibration device |
| CN111288939A (en) * | 2020-03-07 | 2020-06-16 | 中国计量科学研究院 | Full-automatic vibrating wire strain sensor calibrating device |
| CN117606337A (en) * | 2024-01-24 | 2024-02-27 | 威海双丰物探设备股份有限公司 | Strain measuring device for strain ring |
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| WO2018148852A1 (en) * | 2017-02-15 | 2018-08-23 | Digi Sens Ag | Vibrating wire sensor and vibrating wire for a vibrating wire sensor |
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2018
- 2018-11-30 CN CN201811453146.6A patent/CN109357607B/en active Active
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| WO2018148852A1 (en) * | 2017-02-15 | 2018-08-23 | Digi Sens Ag | Vibrating wire sensor and vibrating wire for a vibrating wire sensor |
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Address after: No. 10 Baifo Road, Guancheng District, Zhengzhou City, Henan Province, 450000 Applicant after: Henan Institute of Metrology and Testing Science Address before: No.21 Huayuan Road, Jinshui District, Zhengzhou City, Henan Province Applicant before: HENAN PROVINCE INSTITUTE OF METROLOGY |
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