CN202547578U - Surface roughness measuring device - Google Patents

Abstract

The utility model discloses a device for measuring the surface roughness of road surfaces and fields. The surface roughness measuring device of the present utility model comprises: a vertical frame, on the vertical frame, there is a device for setting a plurality of equidistant measuring needles and making each measuring needle move up and down in the vertical direction. A stylus is placed in the stylus device, and a horizontal frame is also set in the device. The vertical frame cooperates with the slide rail on the horizontal frame so that the vertical frame can move along the slide rail. There are three brackets under the horizontal frame. At least one bracket can adjust its height vertically.

Description

Surface Roughness Measuring Device

technical field

The utility model relates to a height measuring device, in particular to a device for measuring the surface roughness of road surfaces and fields.

Background technique

In the 1990s, American Ali Salch (1993) proposed the chain method to measure the roughness of the ground. Chinese invention patent application 03114152.8 discloses a method for measuring soil roughness similar to the chain method. This patent application includes the following steps: 1) randomly sampling in the target land, randomly fixing two points, and the distance between the two points is L; Put the surface flat, and obtain the straightened distance L' of the soft rope between the two points; 3) measure each sample plot by analogy; 4) obtain the soil roughness Ci=Li'/L of each sample plot according to the measured data (i=1, 2, 3...n), and then obtain the soil roughness of the entire target land.

In order to overcome the shortcomings of the above-mentioned land roughness measuring device, the inventor of the present invention has disclosed two devices for measuring land roughness with a stylus in Chinese invention patent application 200810083194.0 and Chinese invention patent 200910161433.4. Among them, the device disclosed in the 200810083194.0 patent application is that a fulcrum is fixed on a frame, and at least two styli that are parallel to the fixed measuring arm and can move along the upper and lower frames of the frame and the height of the stylus are respectively arranged on the frame. Altitude indication for changes. This device is more accurate in determining the fluctuations in the vertical direction of the surface when measuring the roughness of the land, but it is not very convenient to determine the position in the horizontal direction during the measurement process. The main deficiency is that the reference level used in the measurement process is It is determined by a fixed water container. Due to the change of the fulcrum of the measuring device, the position of its horizontal plane also changes accordingly. Therefore, a "zero" point correction is required in the result calculation, which limits the promotion and use of the device. .

Contents of the invention

The utility model provides a land roughness measuring device which can overcome the deficiencies of the prior art and can provide the same reference point in the vertical direction between different measuring points.

The surface roughness measuring device of the present utility model comprises: a vertical frame, on the vertical frame, there is a device for setting a plurality of equidistant measuring needles and making each measuring needle move up and down in the vertical direction. A stylus is placed in the stylus device, and a horizontal frame is also set in the device. The vertical frame cooperates with the slide rail on the horizontal frame so that the vertical frame can move along the slide rail. There are three brackets under the horizontal frame. At least one bracket can adjust its height vertically.

The horizontal frame in the surface roughness measuring device of the utility model can be provided with two mutually non-parallel level gauges, which can be used conveniently.

The sliding rail of the horizontal frame of the surface roughness measuring device of the utility model is provided with a scale, and the position of the vertical frame can be directly determined in the specific measurement through the provided scale.

In the surface roughness measuring device of the present invention, a scale plate is fixed on the vertical frame, and the reading of the unevenness of the ground surface can be obtained through the scale plate set on the vertical frame, which makes the whole measurement easier. On the vertical frame and above the upper edge of the scale plate and below the lower edge of the scale plate, a stylus setting plate with a hole for matching the stylus is fixed respectively, and the two stylus setting plates constitute a A device for setting the stylus. The stylus hole described here has a slightly larger diameter than the stylus to allow unimpeded vertical movement of the stylus during measurement.

Because there is a horizontal frame in the device of the present invention, it can be adjusted by adjusting the bracket under it according to the ground conditions, so that it is in a horizontal position, so this horizontal frame provides a reference level, and the vertical frame can be used when measuring Moving on the horizontal frame, the horizontal frame can also provide a common reference plane for the stylus set on the vertical frame when measuring, which is convenient for comparing the vertical heights of different styli. Secondly, the utility model cooperates with the vertical frame through the sliding rail arranged on the horizontal frame, so that the vertical frame can move along the horizontal plane, and keep its measuring needle in the vertical state all the time during this process. Thirdly, in the utility model, since a scale plate is fixed on the vertical frame, the height of the stylus can be visually displayed when measuring the stylus, so as to calculate the surface roughness. Fourth, the utility model is provided with a measuring needle control device, which can conveniently control the measuring needle and facilitate measurement.

The utility model advantage is as follows:

1. Since a horizontal plane is set in the device of the present utility model, the same reference point in the vertical direction between the measuring points is provided, thereby ingeniously combining the numerical value of each measuring point with the horizontal plane position of reference to obtain relevant measurement data.

2. Since the utility model is equipped with a movable probe that reflects the unevenness of the ground surface, the utility model can measure the roughness of the ground surface more conveniently and accurately.

3. Since the utility model is provided with two mutually non-parallel spirit levels on the horizontal frame, especially when two mutually perpendicular spirit levels are provided, it is easier to adjust the level of the horizontal frame during measurement.

4. Since the utility model is provided with a scale plate marked with scales, it is convenient to read each measurement point.

5. The utility model is equipped with slide rails, which can make the measuring needle slide freely on the horizontal plane, which ensures the accuracy of the measurement and is more convenient for the measurement operation.

6. The structural features of the utility model can meet the requirements of different measurement accuracy. The distance between the measurement points can be selected according to the requirements of measurement accuracy.

7. The measuring needle method adopted by the device of the utility model has a relatively high measuring accuracy.

8. The device of the utility model has low cost, is easy to make, and is simple and portable, and is especially suitable for the needs of field work.

Description of drawings

Accompanying drawing is a schematic diagram of an embodiment of the utility model, wherein: Fig. 1 is a structural schematic diagram of the utility model, Fig. 2 is a vertical frame structure diagram, Fig. 3 is a schematic diagram of measuring needles and a plurality of measuring needles installed on the scale plate, The left picture is a schematic diagram of a stylus, the right picture is a schematic diagram of multiple styli installed on a scale plate, and Figure 4 is a schematic diagram of a scale plate.

In the above figure: 1 is the vertical frame, 2 is the stylus controller, 3 is the scale plate, 4 is the stylus, 5 is the slide rail with scale on the horizontal frame 6, 6 is the horizontal frame, 7 is set on the horizontal Bracket under frame 6. On the horizontal frame 6 in the figure, two spirit levels that are not parallel to each other can be arranged, especially two spirit levels that are perpendicular to each other can be set, but this content is not shown in the figure.

Detailed ways

The utility model is explained in detail below in conjunction with embodiment and accompanying drawing:

In the utility model embodiment that accompanying drawing provides, vertical frame 2 is made of square or circular profile with section, and its width is 55cm, and height is 35cm. The scale plate 3 is fixed on the vertical frame 1. On the vertical frame and above the upper edge of the scale plate and below the lower edge of the scale plate, there are respectively fixed profiles. There are holes on the two profiles, and the diameter of the holes is slightly larger than the diameter of the measuring needle. The interval between the holes is 2cm, a total of 25 holes are used to control the vertical movement of the stylus. On the upper end of the stylus, set the stylus controller 2, which is used to lift or release the stylus during measurement. The stylus 4 made of a metal rod with a height of 30 cm is passed through these holes respectively, and there are 25 styli in total. Since the diameter of the hole is slightly larger than the outer diameter of the stylus, the stylus can move freely up and down in the hole. Scale is marked on the scale plate 3, see Figure 4. The bottom ends of the two sides of the vertical frame 1 are respectively vertically matched with the horizontal frame 6 equipped with slide rails 5 on both sides, so that the vertical frame can slide back and forth in parallel on the plane of the horizontal frame 6, and the slide rail 5 is provided with a scale . The support 7 is fixed under the horizontal frame 6, and is used to support the measuring device away from the ground surface. At least one of the three supports can adjust its height along the vertical direction of the support, so that the plane of the horizontal frame 6 can be adjusted to the level during actual measurement. , to form a horizontal plane of reference.

In the utility model, the vertical frame 1 can adopt a V-shaped slide block to cooperate with the V-shaped slide rail on the slide rail 5, or the vertical frame 1 adopts a dovetail-shaped slide block to cooperate with the dovetail-shaped slide rail on the slide rail 5.

Measuring needle 4 of the present utility model can be made with thick iron wire, also can be made with the wood material that scale mark is arranged, plastics or other materials. The upper end of the stylus can be made into a larger head, and when it is made of iron wire, a small horizontal end can also be folded as shown in the figure, so that it will not fall off from the hole of the stylus controller 2.

In addition, a device for constraining the stylus controller 2 can be set on the profile at the upper end of the frame 1. The simplest method is to use an ordinary clip to hold the stylus controller 2 when the stylus controller 2 contacts the upper end of the frame 1. fixed.

Put the vertical frame 1 vertically on a horizontal plane, let go of the stylus and drop it freely, and mark the position where the stylus 4 and the "zero line" of the scale plate 3 coincide.

When measuring, first select the surface to be measured, fix the stylus 4 on the upper end of the vertical frame 1 with the stylus control device 2, gently place the device on the surface to be measured, adjust the bracket 7, and make the horizontal frame 6 level. Not lower than the highest point of the surface soil; adjust the position of the vertical frame 1, start measuring from one end of the horizontal frame 6; loosen the probe control device 2, so that each probe falls freely. Record the reading of the position marked by the stylus 4 on the scale plate 3, the upper part of the zero line is a positive number, and the lower part is a negative number. According to the needs of the measurement, the number of repetitions for each measurement plot is selected.

Data processing: take the data measured each time the measuring device is fixed (that is, one measurement point) as a calculation unit, input the measured data, and directly calculate the standard error (standard error, se) of the measured value according to the statistical method.

Surface roughness coefficient (R): The surface roughness coefficient is calculated by the following formula:

R = 10 x se.

Claims (4)

1. roughness of ground surface measurement mechanism; Comprise: a vertical framework; On vertical framework, be useful on chaining pin that a plurality of equidistance place and the device that each chaining pin is vertically moved up and down are set, be placed with chaining pin, it is characterized in that also being provided with in the device horizontal frame at the device that is used for being provided with chaining pin; Vertical frame cooperates with slide rail on the horizontal frame; Vertical frame can be moved along slide rail, and horizontal frame is arranged with three supports, and the support that has at least wherein can vertically be adjusted its height.

2. the described roughness of ground surface measurement mechanism of claim 1 is characterized in that horizontal frame is provided with two mutual uneven level meters.

3. claim 1 or 2 described roughness of ground surface measurement mechanisms is characterized in that the slide rail of horizontal frame is provided with scale.

4. the described roughness of ground surface measurement mechanism of claim 3; It is characterized in that being fixed with on the vertical frame scaleplate; On the vertical frame and be positioned on the upper limb of scaleplate with the scaleplate lower edge under respectively be fixed with one have the hole that cooperates with chaining pin on it chaining pin plate is set, and the device that plate is configured for being provided with chaining pin is set by these two chaining pins.

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