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Flatness measuring instrument and method

A measurement method and flatness technology, applied in the flatness measuring instrument and the measurement field, can solve the problems of unsuitable measurement and low test efficiency, and achieve the effects of automatic data collection and result analysis, fast detection speed, and accurate calculation.

Inactive Publication Date: 2013-09-11
GUANGDONG HUILIPU ROAD & BRIDGE INFORMATION ENG
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AI Technical Summary

Problems solved by technology

The equipment has great flexibility and is suitable for measuring the smoothness of the road surface; but its test efficiency is low (detection speed ≤ 12km / h), and it is not suitable for measuring on roads with many potholes and serious damage

Method used

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  • Flatness measuring instrument and method
  • Flatness measuring instrument and method

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Embodiment Construction

[0032] Please refer to figure 1 As shown, it has shown the specific structure of the preferred embodiment of the present invention. The block diagram of the road surface smoothness system is composed of two parts: the upper computer 11 and the lower computer 20. The upper computer 11 and the lower computer 20 use the CAN bus to realize communication.

[0033] Wherein the upper computer 11 is connected with a rotary encoder 11 for detecting distance information, and the upper computer 11 has a built-in 8254 chip and a crystal oscillator. The host computer 11 is responsible for: ① detecting the sampling distance signal; ② using the chip 8254 to generate a fixed-distance sampling interrupt signal; ③ using the 8254 chip and crystal oscillator to generate a time interrupt signal (providing time for calculating the second integral of acceleration); ④ calculating and storing IRI data .

[0034] The lower computer 20 is connected with a laser ranging sensor 21 and an acceleration sen...

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Abstract

The invention discloses a flatness measuring instrument and method. The flatness measuring instrument consists of two parts, namely an upper computer and a lower computer, wherein the upper computer and the lower computer are in communication by a controller area network (CAN) bus; the lower computer is connected with a distance measuring sensor and an acceleration sensor; the lower computer samples the change of road elevation detected by the distance measuring sensor and acceleration data detected by the acceleration sensor, records the interval time of two sampling and performs filtering processing on the acceleration data; the upper computer is connected with a rotary encoder for detecting distance information, detects a sampling distance signal, generates a fixed distance sampling interruption signal and a time interrupt signal and calculates and stores IRI data. The laser flatness detection system is applied to detection on the flatness of expressway bituminous pavements and has the advantages of high detection speed, accurate calculation, automatic data acquisition and result analysis and the like.

Description

technical field [0001] The invention relates to the technology in the field of automatic detection, in particular to a flatness measuring instrument and a measuring method. Background technique [0002] Expressway pavement roughness can be defined as the elevation change of the pavement surface that induces the vehicle to vibrate. It is an important index for evaluating the performance and maintenance quality of the pavement. The change of the flatness index can reflect the overall quality of the pavement. Most pavement diseases will almost affect the flatness. Therefore, the detection of the flatness is a very important link in the construction and maintenance of the pavement. With the rapid development of high-grade highways, the requirements for road surface roughness are getting higher and higher. The pass rate of road surface roughness is directly related to the level of comfort, safety, convenience and other services provided by highways to users, and is related to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/01
Inventor 李遵杰周爱明
Owner GUANGDONG HUILIPU ROAD & BRIDGE INFORMATION ENG
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