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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: 2014-06-18
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are problems such as complex operation control and difficult maintenance

Method used

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

Examples

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Embodiment Construction

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

[0018] Such as Figure 1~5 As shown, the multi-point sensor drop-weight deflection meter includes a bearing device 1, a sensor beam 4, a deflection sensor 7 and a guiding mechanism 10. The bearing device 1 is a drop-weight deflection device that bears the impact of a heavy hammer and The impact is transmitted to the road surface to measure the impact force and maximum deflection at the same time. The lower end of the bearing device 1 is fixedly installed with a hook 5, and the part of the hook 5 extending out of the bearing device 1 is two parallel to each other, with " V"-shaped gap plate structure. The sensor beam 4 includes a beam 8, a hook welding assembly 6, a wire rope adjusting shaft 9, a guide mechanism 10, a fixed pulley 11, and a counterweight 12. The left ends of the two parallel beams 8 are fixedly connected to the hook welding assembly 6. The rod-shaped struct...

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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 testing of the strength of the roadbed and pavement, in particular to a multi-point sensor drop hammer deflection meter. Background technique [0002] In the past two decades, the research and development of road surface nondestructive testing technology has received increasing attention at home and abroad. Deflection is the most important pavement structure strength evaluation index, and its testing equipment and analysis technology have developed rapidly. Since the beam deflection tester was invented in 1953, pavement deflection testing equipment has developed from a static deflection tester to a drop hammer deflection tester that simulates the effect of driving loads, and from a single point maximum deflection test to multiple points of road deflection. The test and back-calculation analysis of the elastic modulus of each pavement structure layer based on the multi-point deflection data pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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