Calibration device of wave velocity detector

Abstract

The utility model relates to the technical field of wave velocity detectors, in particular to a calibration device of a wave velocity detector. Comprising a hoisting support, a calibration piece, a pulley device and a wave velocity detector, the wave velocity detector is composed of an electromagnetic vibration exciter and two independent wave detectors, the hoisting support is used for providing a vertical suspension supporting structure, a cylindrical hole is formed in the calibration piece, and the calibration piece is vertically suspended below the hoisting support; the pulley device is installed on the hoisting support and used for adjusting the position of the wave velocity detector by pulling and releasing a cable, and the wave velocity detector is externally connected to the wave velocity tester through the cable of the pulley device and vertically moves along the cylindrical hole of the calibration piece. The utility model provides a calibration device of a wave velocity detector, and aims to solve the problems that the test error is large and the precision is reduced after long-term use due to the fact that an electromagnetic vibration exciter adsorbs scrap iron in the use process of the conventional wave velocity detector.

Description

TECHNICAL FIELD

[0001] The utility model relates to wave velocity detector technical field especially relates to a kind of wave velocity detector's calibration device. BACKGROUND

[0002] Wave velocity tester is applicable to engineering survey shear wave, compression wave test in actual work;It is applicable to ground pulsation predominant period test and provides parameter for multiple engineering application scenarios such as anti-seismic design.

[0003] Wave velocity tester is mainly composed of wave velocity tester, three-component detector, trigger detector, ground pulsation sensor and special cable;Wave velocity detector is mainly composed of cylindrical metal waterproof full-sealed electromagnetic exciter, two independent full-sealed detectors, damping and high-strength flexible pipe etc.Working principle is to use the detector placed in borehole to receive S wave signal from seismic source to first arrival time, to determine the wave velocity of stratum where borehole is located.

[0004] But in situ test, wave velocity probe sealed electromagnetic exciter, electromagnetic is often easy to adsorb a large number of iron filings, resulting in the ability of electromagnetic excitation vibrator to produce S wave is weakened, thereby causing test result error to be large.In long-term use, wave velocity detector inevitably has the problem of precision decline. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of wave velocity detector's calibration device, to solve the problem of the test error of existing wave velocity detector being large due to electromagnetic excitation vibrator adsorbing iron filings in the process of use and precision decline after long-term use.

[0006] The technical scheme adopted by the utility model is as follows: a kind of wave velocity detector's calibration device, including hoisting support, calibration piece, pulley device and wave velocity detector, the wave velocity detector is composed of electromagnetic excitation vibrator and two independent detectors, the hoisting support is used to provide vertical suspension support structure, the calibration piece is internally provided with cylindrical hole and calibration piece is vertically suspended below hoisting support, the pulley device is installed on hoisting support and pulley device is used to adjust the position of wave velocity detector by pulling cable line, the wave velocity detector is externally connected to wave velocity tester by the cable line of pulley device and wave velocity detector moves vertically along the cylindrical hole of calibration piece.

[0007] As further improvement of the utility model, the calibration piece is high-strength standard concrete block, and the diameter of the cylindrical hole matches the outer diameter of the wave velocity detector.

[0008] As further improvement of the utility model, the pulley device includes at least one fixed pulley, the fixed pulley is fixed to the top of the hoisting support, and the fixed pulley is used to guide the vertical movement of the cable line.

[0009] As a further improvement of the utility model, the lifting support is a rigid support with adjustable height and a fixed base is arranged at the bottom of the lifting support.

[0010] As a further improvement of the utility model, the electromagnetic exciter is arranged above the two detectors.

[0011] As a further improvement of the utility model, the electromagnetic exciter of the wave velocity detector is connected with the two detectors through a high-strength soft rubber pipe to form an integrated structure.

[0012] The utility model discloses the beneficial effects that (1) the utility model discloses a lifting support vertically suspends the calibration piece, and the position of the wave velocity detector is accurately adjusted in combination with the pulley device, the uncertainty of the on-site drilling environment is avoided, fixed and stable test conditions are provided for calibration, and the repeatability and accuracy of the calibration result are significantly improved.

[0013] (2) the utility model discloses a high-strength standard concrete block as a calibration piece, and the cylindrical hole design of stable material quality and matching the outer diameter of the wave velocity detector can keep the geometric characteristics unchanged for a long time, and ensure the reliability of the calibration reference.

[0014] (3) the adjustable height lifting support and the fixed pulley device of the utility model simplify the position adjustment process of the detector, reduce the difficulty of manual operation, and greatly shorten the calibration time.

[0015] (4) the utility model discloses a calibration device for a wave velocity detector, which can timely find the performance attenuation problem caused by the electromagnetic exciter adsorbing iron filings, avoid error accumulation, prolong the service life of the equipment, reduce the rework risk caused by insufficient precision, and finally reduce the on-site test cost and safety risk. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the calibration device for the wave velocity detector of the utility model.

[0017] As shown in the figure: 1, electromagnetic exciter;2, detector;3, high-strength soft rubber pipe;4, calibration piece;5, pulley device;6, lifting support. DETAILED DESCRIPTION

[0018] In the present specification, the orientation terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or possibly mentioned are defined with respect to its structure, and they are relative concepts. Therefore, it is possible to change accordingly according to its different positions, different use states, so it should not be interpreted as a restrictive term.

[0019] As used in this specification and claims, the terms "for example," "e.g.," "for instance," "like," and "such as," and the like, mean "for the purpose of illustration" and are not intended to limit the items or events to the listed items or events. Such terms are not intended to exclude other, conventional items or events that are likewise within the scope of the disclosure.

[0020] In order to make the technical problems, technical schemes and beneficial effects to be solved in the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the embodiments described herein are only used to explain the present application and not used to limit the present application.

[0021] The utility model provides a kind of calibration device of wave velocity detector as shown in the drawings Figure 1 As shown in the drawings, the utility model discloses a kind of calibration device of wave velocity detector, including hoisting support 6, calibration piece 4, pulley device 5 and wave velocity detector, wave velocity detector is composed of electromagnetic exciter 1 and two independent detectors 2, hoisting support 6 is used to provide vertical suspension support structure, calibration piece 4 is internally provided with cylindrical hole and calibration piece 4 is vertically suspended below hoisting support 6, pulley device 5 is installed on hoisting support 6 and pulley device 5 is used to adjust the position of wave velocity detector by pulling cable, wave velocity detector is externally connected to wave velocity tester by the cable of pulley device 5 and wave velocity detector moves vertically along the cylindrical hole of calibration piece 4.

[0022] As shown in the drawings, Figure 1 The utility model discloses a kind of calibration piece 4 in the utility model for high-strength standard concrete block, the diameter of cylindrical hole is matched with the outer diameter of wave velocity detector, to ensure that wave velocity detector can smoothly and stably pass through hole, realize accurate calibration.

[0023] As shown in the drawings, Figure 1 The utility model discloses a kind of pulley device 5 in the utility model, including at least one fixed pulley, fixed pulley is fixed on the top of hoisting support 6 and fixed pulley is used to guide the vertical motion of cable, to ensure that wave velocity detector moves smoothly in vertical direction, improve calibration accuracy.

[0024] As shown in the drawings, Figure 1 The utility model discloses a kind of hoisting support 6 in the utility model for adjustable height rigid support and hoisting support 6 bottom is equipped with fixed base, to facilitate the suspension height of calibration piece 4 according to actual needs adjustment, meet the calibration needs of different wave velocity detector.

[0025] As shown in the drawings, Figure 1 The utility model discloses a kind of electromagnetic exciter 1 in the utility model, located above two detectors 2, the electromagnetic exciter 1 of wave velocity detector and two detectors 2 are connected by high-strength soft rubber tube 3, form integrated structure, to ensure that wave velocity detector has good stability and reliability during testing.

[0026] The calibration device realizes accurate calibration on the wave velocity detector by combining structural design with standardized process.

[0027] (I) Device installation and initial calibration

[0028] The high-strength standard concrete block of the calibration piece 4 is vertically hung on the fixed base through the hoisting support 6, so as to ensure that the cylindrical hole axis of the calibration piece 4 is consistent with the direction of gravity. The depth of the hole is adjusted by adjusting the height of the hoisting support 6, so as to adapt to the test requirements of the wave velocity detector. Then, the newly manufactured and tested wave velocity detector is slowly lowered into the hole of the calibration piece 4 through the cable of the pulley device 5, so as to ensure that it moves stably in the vertical direction. At this time, the electromagnetic exciter 1 is located above the two detectors 2, and the three form an integrated structure through the high-strength soft rubber pipe 3, so as to reduce external vibration interference.

[0029] (II) Standard value determination

[0030] The wave velocity tester is started, the electromagnetic exciter 1 generates a transient impact force perpendicular to the hole wall, and an S wave is generated. After the S wave signal propagates through the calibration piece 4, it is received by the two detectors 2 and converted into an electrical signal, which is transmitted to the host computer for analysis. The host computer calculates the time difference between the two detector signals, automatically obtains the S wave propagation speed of the calibration piece 4, and stores it as a standard reference value.

[0031] (III) Test of the device to be calibrated

[0032] The wave velocity detector in use needs to be calibrated through the same process and is installed into the calibration device. The pulley device 5 is adjusted so that the detector completely enters the hole of the calibration piece 4. The electromagnetic exciter 1 is triggered repeatedly, and the test data of the detector 2 are recorded. The S wave propagation speed value of the current device is calculated.

[0033] (IV) Data comparison and calibration determination

[0034] The test data of the device to be calibrated are compared with the standard value measured by the new device. If the error is within the allowable range, such as ±5%, it is determined that the device precision is qualified. If the error exceeds the threshold, it indicates that the device performance has been attenuated due to the absorption of iron filings by the electromagnetic exciter 1 or long-term use, and needs to be returned to the factory for maintenance or replacement of parts.

[0035] (V) Structure optimization and error suppression

[0036] The stable material of the calibration piece 4 is matched with the hole to avoid the uncertainty of the on-site drilling environment; the fixed pulley design of the pulley device 5 ensures the vertical movement of the detector and reduces the positional deviation; the adjustable height and rigid support of the hoisting support 6 further ensure the consistency of the test conditions. Through regular calibration, the signal attenuation problem caused by the absorption of iron filings can be found in time, the error accumulation can be avoided, and the service life of the device can be prolonged.

[0037] The utility model discloses through structural innovation and standardization operation, effectively solved the test error problem of existing technology because of scrap iron adsorption, equipment aging and environmental fluctuation, significantly promoted the calibration efficiency and reliability of wave velocity detector. It is embodied specifically in: (1) fixed reference environment: the combination of the calibration piece 4 and the hoisting support 6 eliminates the field environment interference, ensures the uniqueness of the calibration reference. (2) Efficient operation process: the pulley device 5 simplifies the positioning operation of the detector, and the integrated structure soft rubber tube connection enhances the signal stability, and the calibration time is greatly shortened. (3) Long-term reliability: by comparing the data of new and old equipment, the instrument performance can be dynamically monitored, and the on-site rework risk caused by insufficient accuracy is reduced.

[0038] The above implementation manners are only used to illustrate the technical scheme of the utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing implementation manners, those skilled in the art should understand that they can still modify the technical scheme recorded in the foregoing implementation manners, or make equivalent replacement to part of the technical features. The modification or replacement does not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the utility model implementation manner.

Claims

1. A calibration device for a wave velocity probe, comprising a hoisting support (6), a calibration element (4), a pulley arrangement (5) and a wave velocity probe, characterized in that: The wave velocity detector is composed of an electromagnetic exciter (1) and two independent detectors (2), the hoisting support (6) is used for providing a vertical suspension support structure, the calibration member (4) is internally provided with a cylindrical hole and is vertically suspended below the hoisting support (6), the pulley device (5) is installed on the hoisting support (6) and is used for adjusting the position of the wave velocity detector by pulling and releasing the cable, the wave velocity detector is externally connected to the wave velocity tester through the cable of the pulley device (5) and vertically moves along the cylindrical hole of the calibration member (4).

2. A calibration device for a wave speed probe according to claim 1, characterised in that: The calibration member (4) is a high-strength standard concrete block, and the diameter of the cylindrical hole is matched with the outer diameter of the wave velocity detector.

3. A calibration device for a wave speed probe according to claim 1, characterized in that: The pulley device (5) comprises at least one fixed pulley, the fixed pulley is fixed to the top of the hoisting support (6) and is used for guiding the vertical movement of the cable.

4. A calibration device for a wave speed probe according to claim 1, characterized in that: The hoisting support (6) is a rigid support with adjustable height and is provided with a fixed base at the bottom.

5. The calibration apparatus for a wave speed probe of claim 1, wherein: The electromagnetic exciter (1) is located above the two detectors (2).

6. A calibration device for a wave speed probe according to claim 5, characterised in that: The electromagnetic exciter (1) and the two detectors (2) of the wave velocity detector are connected through a high-strength soft rubber pipe (3), forming an integrated structure.

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