WO2019000261A1

WO2019000261A1 - Non-contact type subsidence value detection system for portable falling weight deflectometer

Info

Publication number: WO2019000261A1
Application number: PCT/CN2017/090474
Authority: WO
Inventors: 张丛
Original assignee: 深圳市樊溪电子有限公司
Priority date: 2017-06-26
Filing date: 2017-06-28
Publication date: 2019-01-03
Also published as: CN107132135A

Abstract

Provided is a non-contact type subsidence value detection system (1) for a portable falling weight deflectometer, which comprises a base (2), a detected portable falling weight deflectometer (3), a photoelectric sensor probe (4), a power supply and control system (5) and a platform electric control system (6), wherein the platform electric control system (6) is used for controlling the base (2) and the detected portable falling weight deflectometer (3) to be subjected to operation complying with detection conditions; and the subsidence value detection system further comprises an optical vibration isolation platform (9). The detected portable falling weight deflectometer (3) is mounted on the optical vibration isolation platform (9) with a certain flatness and surface roughness. The optical vibration isolation platform (9) has a fixed range of horizontal and vertical natural frequencies, and the amplitude is within a certain range.

Description

Submerged value detection system of non-contact hand-held drop hammer deflection instrument

[0001] The present invention relates to the field of metrology, and in particular to a sinking value detecting system for a non-contact hand-held drop hammer deflection device.

[0002] The hand-held drop hammer deflection instrument is a dynamic measuring instrument for monitoring and detecting the dynamic characteristics of the foundation - dynamic deformation modulus. It is a special foundation construction quality measuring instrument widely used in railways, highways, high-speed railways, airports. The monitoring and inspection of the quality of foundation construction of urban traffic is especially suitable for the detection of narrow sections of the site, such as the transition section of roads and bridges, and existing line foundations. After the measurement program is started, three impact tests will be performed, and the sinker will display the subsidence value after each impact. At the end of a test cycle, the average subsidence value and the dynamic deformation modulus value are obtained and displayed on the LCD screen. The hand-held drop hammer deflection device is composed of a loading device, a sinking tester and a carrier plate. The sinking value of the sinking measuring instrument is difficult to detect, and the calibration of the dynamic measuring instrument is a difficult point of the length measuring and detecting. The hammer deflection detector is provided with a ring at the front end of the guide rod holder, and a contact displacement sensor holder is arranged at the lower portion of the column to reproduce a standard subsidence value in the operation, but the operation steps are complicated. The contact sensor is easily separated from the instrument to be detected, and the detection distortion is generated. The post-calculation process is complicated, which greatly restricts the quality and efficiency of the test.

[0003] In addition, there are not many mechanisms for studying the drop hammer deflection tester. For example, China Railway Corporation has studied the handheld drop weight deflection device calibration device, and still uses the contact displacement sensor to carry out the sinking value of the handheld drop hammer deflection device. Detection, unable to achieve fast response, there is data distortion, can not accurately measure the indication error of the handheld drop hammer deflection instrument; China Communications Corporation to study the application of the handheld drop hammer deflection instrument in the construction of the Kua highway subgrade; North The University of Technology studied the research on the correlation between the quality indicators of the subgrade compaction and the subsidence value of the railway subgrade, but did not study the traceability of the subsidence value.

technical problem

[0004] Replacing the measurement method of the contact sensor, improving the recurrence accuracy of the subsidence value, and the continuous recurrence of the sinking value of the hand-held drop hammer deflection instrument is still a research difficulty. Problem solution

Technical solution

[0005] It is an object of the present invention to provide a sink value detection system for a non-contact hand-held drop weight deflector, including a base, a hand-held drop weight deflector, a photoelectric sensor probe, a power supply and control system, and a platform power The control system, the platform electronic control system is configured to control the base and the detected hand-held drop weight deflector to perform operations in accordance with the detection condition.

[0006] Preferably, the subsidence value detecting system further comprises an optical vibration isolation platform, the measured hand-held hammer sinker is installed at a certain flatness, surface roughness, a fixed range of horizontal and vertical natural frequencies and amplitudes. On a certain range of the optical vibration isolation platform, the detection effect is optimized.

[0007] Preferably, the hand-held drop weight sink sinking value detecting system further comprises a pitch calibration calibration block of the triangular distributed beam, and the calibration block is subjected to a composite optical three-coordinate calibration calibration with a measurement uncertainty better than 0.05 micrometer.

[0008] Preferably, the handheld drop weight deflection device detection system uses a dual-frequency laser interferometer with a certain precision as a length standard, and the calibration block is used as a reference with the distance of the triangular distribution beam, and the handheld drop hammer deflection instrument The effective distance of the probe beam is calibrated.

[0009] Preferably, the photoelectric sensor probe is a laser photoelectric sensor probe.

[0010] Preferably, the photosensor probe is linearly calibrated using a second equal amount block.

[0011] Preferably, the hand-held drop weight sink sink value detection system further comprises a signal processing module, and the signal processing module comprises a laser, a signal processing unit and an environment compensation unit.

[0012] Preferably, the laser is a triangular method laser.

[0013] Preferably, the environmental compensation unit comprises a temperature compensation unit and a pressure compensation unit.

[0014] Preferably, the hand-held drop weight sink sink value detection system further comprises a computer integrated module having a human-computer interaction interface, realizing control of the position of the photoelectric sensor probe and data acquisition, and reconstructing by using the constructed mathematical model. The sinking value measurement data is stored and displayed.

The above and other objects, advantages and features of the present invention will become apparent to those skilled in the <RTI

Advantageous effects of the invention

Beneficial effect

[0016] The test results are consistent, and the accuracy, efficiency, and operability are significantly superior to those of conventional contact measurement. The non-contact and intelligent detection of the subsidence value makes the measurement results more accurate and the continuous recurrence rate increases.

Brief description of the drawing

DRAWINGS

[0017] Some specific embodiments of the present invention will be described in detail, by way of example, and not limitation, The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent from the following description in conjunction with the accompanying drawings in which:

1 is a schematic view showing the structure of a sinker value detecting device of a non-contact hand-held drop weight deflector according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0019] Referring to FIG. 1, a sinking value detecting system 1 of a non-contact hand-held drop weight deflector includes a base 2, a hand-held drop weight deflector 3, a photoelectric sensor probe 4, a power supply and a control system. 5 and the platform electronic control system 6, the platform electronic control system 6 is used to control the base 2 and the detected hand-held drop weight deflector 3 to perform operations in accordance with the detection conditions. The subsidence value detecting system 1 further includes an optical vibration isolation platform 9, which is mounted at a certain flatness, surface roughness, a fixed range of horizontal and vertical natural frequencies, and amplitudes in a certain range. The optical vibration isolation platform 9 is used to optimize the detection effect. The hand-held drop hammer deflection sink detection system 1 further includes a pitch calibration calibration block 1-1 of the triangular distribution beam, and the calibration block 1- 1 is subjected to a composite optical coordinate calibration calibration with a measurement uncertainty of better than 0.05 micrometer. The detection principle is that the handheld drop weight deflection device detection system 1 uses a 0.5ppm precision dual-frequency laser interferometer as the length standard, and the calibration of the triangular distribution beam is used to calibrate the calibration block 1-1 as a reference for the handheld drop hammer deflection meter. The effective distance of the probe beam is calibrated, the calibration result is 200.0261 mm, and the photoelectric sensor probe 4 is a laser photoelectric sensor probe. Of course, other photoelectric sensor probes which can be equivalent to the precision micrometer for the triangular distribution pitch can be used. The photoelectric sensor probe 4 Linear calibration was performed using a two-equivalent block. The subsidence value detecting system 1 further includes a signal processing module 7, which includes a laser 7-1, a signal processing unit 7-2 and an environmental compensation unit 7-3, wherein the laser 7-1 is a triangular laser, and of course Using other similar lasers, the environmental compensation unit 7-3 includes a temperature compensation unit 7-3-1 and a pressure compensation unit 7-3-2 (in the figure) Not shown). The handheld drop hammer deflection sink detection system further includes a computer integrated module 8, wherein the computer integrated module 8 has a human-computer interaction interface, realizes control of the position of the photoelectric sensor probe and data acquisition, and reproduces through the constructed mathematical model. The sinking value measurement data is stored and displayed in real time. The software design mainly adopts the Visual C++ environment, and uses the .NET burst to control the human-machine interface to establish a hardware communication mechanism.

[0020] When using the test system for testing, the environment construction is first required, and the dynamic deformation modulus tester is tested in a laboratory with a constant temperature constant humidity laboratory RH ( ) <3⁄4 in the laboratory. Considering the small drop vibration displacement of the dynamic drop modulus tester for the sinking value of the drop hammer deflection device, the detector is installed at a flatness of <0.051^ ₁ /1 for the installation of anti-vibration, noise-removing, dust-removing and shielding facilities. ₁ 2, the surface roughness <0.8 microns, the vertical natural frequency is 1.2-2Hz, the horizontal natural frequency is the same as the vertical natural frequency and the amplitude is <1.2 microns. The experimental results are ideal. According to the requirements of the regulations, the hand-held drop weight deflection device is tested and calibrated to meet the subsidence value of S<1.0 mm. The deviation is based on the JJG (railway) hand-held drop hammer deflection tester. Accuracy, efficiency and operability have significantly better than traditional contact measurement instruments, using non-contact photoelectric probes instead of displacement sensor probes, intelligent detection of subsidence values, more accurate measurement results, continuous recurrence rate improve.

The present invention has been described with reference to the specific illustrative embodiments, and is not limited by the scope of the appended claims. It will be appreciated by those skilled in the art that the embodiments of the present invention can be modified and modified without departing from the scope and spirit of the invention.

Claims

Claim

[Claim 1] A subsidence value detecting system (1) of a non-contact hand-held drop weight deflector, characterized in that

: including base (2), hand-held drop weight deflector (3), photoelectric sensor probe (4), power supply and control system (5), and platform electronic control system (6), the platform electronic control system ( 6) For controlling the base (2) and the detected hand-held drop weight deflector (3) to perform an operation in accordance with the detection condition.

2. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 1, wherein: the subsidence value detecting system (1) further comprises an optical vibration isolating platform (9) The measured hand-held hammer sinker (3) is mounted on a certain flatness, surface roughness, a fixed range of horizontal and vertical natural frequencies, and amplitudes on a range of the optical vibration isolation platform (9) , thereby optimizing the detection effect.

4. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 1, wherein: the hand-held drop hammer deflection sink sinking value detecting system (1) further comprises The calibration of the triangular distribution beam is calibrated (1-1), and the calibration block is calibrated by a composite optical coordinate calibration with a measurement uncertainty of better than 0.05 μm.

5. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 4, wherein: the hand-held drop hammer deflection sink sinking value detecting system has a certain precision double The frequency laser interferometer is used as the length standard, and the calibration block (1-1) is used as a reference to calibrate the effective distance of the probe beam of the hand-held drop weight deflector (3).

6. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 1, wherein: the photosensor probe (4) is a laser photosensor probe.

7. A sinker value detecting system (1) for a non-contact hand-held drop weight deflector according to claim 6, wherein: said photosensor probe (4) is linearly calibrated using a second equal amount block.

8. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 1, wherein: the hand-held drop hammer deflection sink sinking value detecting system (1) Also included is a signal processing module (7) that includes a laser (7-1), a signal processing unit (7-2), and an environmental compensation unit (7-3).

9. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 8, wherein: the environmental compensation unit (7-3) comprises a temperature compensation unit (7- 3-1) and pressure compensation unit (7-3-2).

10. The sinker value detecting system (1) of a non-contact hand-held drop weight deflector according to claim 1, wherein: the hand-held drop hammer deflection sink sinking value detecting system (1) further comprises a computer integrated module (8), the computer integrated module (8) has a human-computer interaction interface, realizes control and data acquisition of the position of the photoelectric sensor probe, and stores and realizes the reproduced subsidence value measurement data through the constructed mathematical model.吋 Display.