Multipoint sensor FWD (Falling Weight Deflectometer)

A drop-weight deflectometer and sensor technology, used in instruments, scientific instruments, and the use of one-time impact force to test the strength of materials, etc., can solve the problems of difficult maintenance, complicated operation control, etc., to simplify the lifting structure and enhance the stability of the structure. , the effect of improving the measurement accuracy

Active Publication Date: 2012-05-23
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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Problems solved by technology

There are problems such as complex oper

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  • Multipoint sensor FWD (Falling Weight Deflectometer)
  • Multipoint sensor FWD (Falling Weight Deflectometer)
  • Multipoint sensor FWD (Falling Weight Deflectometer)

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] Such as Figure 1~5 As shown, the multi-point sensor drop weight deflectometer includes a carrying device 1, a sensor beam 4, a deflection sensor 7, and a guide mechanism 10, wherein the carrying device 1 is a drop weight deflectometer that withstands the impact of a heavy hammer and will The impact is transmitted to the road surface and the mechanism for measuring the impact force and the maximum deflection. The lower end of the bearing device 1 is fixedly equipped with a hook 5, and the parts of the hook 5 protruding from the bearing device 1 are two parallel to each other, with " V”-shaped notched plate-like structure. The sensor crossbeam 4 includes a crossbeam 8, a hook welding combination 6, a wire rope adjusting shaft 9, a guide mechanism 10, a fixed pulley 11 and a counterweight 12, wherein the left ends of two parallel crossbeams 8 are fixedl...

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Abstract

The invention relates to the technical field of non-destruction detection of highway subgrade and pavement strength, and in particular discloses a multipoint sensor FWD (Falling Weight Deflectometer). A hasp is fixedly arranged at the lower end of a bearing device of the multipoint sensor FWD and can be in lap-joint with a sensor cross beam, a hasp wielding combination is arranged at the right end of the sensor cross beam, the other end of the sensor cross beam is fixedly connected with the upper end of the bearing device through a steel wire rope after passing through three pulleys arranged on a trailer chassis, and deflection sensors, a guiding mechanism and a balance weight are arranged on the sensor cross beam,. According to the multipoint sensor FWD disclosed by the invention, a lifting mechanism of each cross beam of the multipoint sensor FWD is simplified, and a mounting box of each multipoint sensor cross beam is convenient to dismantle, thus the maintenance is improved; in addition, the guiding mechanism is additionally arranged on the sensor cross beam, thus the influence of a lateral force on the multipoint sensor cross beam is automatically regulated and eliminated, the structure stability is increased, and the deflection measurement precision is improved.

Description

technical field [0001] The invention relates to the technical field of non-destructive detection of roadbed pavement strength, in particular to a multi-point sensor drop weight deflection instrument. Background technique [0002] In the past two decades, the research and development of pavement non-destructive testing technology has been paid more and more attention at home and abroad. Deflection is the most important evaluation index of pavement structural strength, and its detection equipment and analysis technology have developed rapidly. Since the invention of the beam deflection instrument in 1953, the pavement deflection testing equipment has developed from a static deflection instrument to a drop hammer deflection instrument that simulates the driving load, and from a single-point maximum deflection test to a multi-point pavement deflection test. The test and the back calculation analysis of the elastic modulus of each structural layer of the pavement based on the mu...

Claims

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Application Information

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IPC IPC(8): G01N3/30G01N3/303E01C23/01
Inventor 王兵刘晓旭陈善志高翌春
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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