1. Say clearly

In the 21st century, the national transportation industry has flourished, and the national highway trunk line has been built thousands of miles a day. In order to meet the needs of highway construction and rapid development, our company The utility model relates to a series of high-tech products developed and produced jointly with relevant scientific research departments, among which is the pendulum friction coefficient measuring instrument used for road surface quality inspection, which can be used for high-grade highway, city road and airport runway anti-skid performance test to a new level and can be compared with similar products from abroad.  One of the missing testing instruments 。

II. Principles

The pendulum friction coefficient tester is a dynamic pendulum impact instrument. It is developed according to the basic principle that "the potential energy loss of the pendulum is equal to the work done to overcome the friction of the road when the rubber film at the end of the pendulum slips on the road surface". 

III. Structure (see photo)

1.Base: consists of T - leg, leveling screw and leveling bubble.

2. A column consisting of a column, a lifting mechanism, a guide rod, and an instrument handle, used for lifting and fixing the position of a swinging head.

3.Release Switch: A switch mounted on a cantilever to hold the pendulum horizontally and release the pendulum.

4. Steering system: includes fastening handles, swinging shafts, steering joints and bearings, hoisting, fixing position, guaranteed in The swinging plane can swing freely.

5. Coefficient system: including pointer felt ring, press cover, pointer adjust nut and dial, pointer can refer directly to The pendulum value is shown.

6, hammer head: by upper and lower joint, pendulum rod, spring, lever, lifting handle, hammer shell, slippage block and rubber film(76 mm ×25.4 mm ×6.35 mm) consisting of a specified torque on the swing center and a specified pressure on the pavement

Before and after, left and right torque balance, it is a measure of road friction coefficient.

The structure of the instrument is shown in Figure 1 below

7. Main technical parameters

1.Weight of pendulum:1500±30g center distance:410±5mm

2.Positive static pressure of rubber sheet on pavement:2263g

3.No less than 70 times the swing stops from 5°tilt freely.

4.The outer edge of the rubber sheet is 510 mm from the swing center.

8. Usage

Point selection: in the test section, along the driving direction of the wheel track, select representative five measuring points, each.

The distance between the measuring points is about 5 ≤ 10 m.

2. Instrument leveling:

Place the instrument on the measuring point and align the swinging direction with the driving direction.

(2) turn the leveling screw to center the leveling bubble

 3, Zero: