CN209979632U - Slump automatic determinator based on laser emission board range finding - Google Patents

Abstract

The utility model discloses a slump automatic determination appearance based on laser emission board range finding, including rectangle frame chassis, electric lift, laser emission board, laser receiver, signal converter and display screen, electric lift installs on the frame before the chassis, and electric lift's lifter is connected to rectangular type laser emission board, and a plurality of laser emission points are established to the last level row of laser emission board, and laser receiver is fixed to be erect on the chassis back frame for receive laser emission board's transmitting signal, the signal converter is connected to the laser receiver electricity, and electric lift is connected to the signal converter electricity again, signal converter signal connection display screen. The utility model discloses outside being independent of the slump section of thick bamboo, need not to shift, arrange the fast automatic concrete peak of looking for of the multi beam laser of establishing to the slump is shown on the display screen to the accuracy is read out, improves measuring accuracy and speed.

Description

An automatic slump measuring instrument based on laser emission plate ranging

technical field

The utility model relates to the field of concrete performance testing equipment, in particular to an automatic slump measuring instrument based on laser emission plate ranging.

Background technique

Concrete slump refers to the workability of concrete. Specifically, it is an index to measure concrete to ensure the normal progress of construction. Work properly. In construction sites and laboratories, slump cylinders are used to test the slump of concrete mortar. The concrete is tamped with the tamping rod. After the filling is completed, the excess mixture is scraped off with a trowel, and the mouth of the cylinder is smoothed, and then the slump cylinder is quickly lifted, but the concrete must not be affected by lateral and torsional forces. Finally, use the tool to measure the height of the highest point of its concrete stable pile and record it.

At present, Chinese patent CN204925119U discloses a slump cylinder with a laser transmitter, which discloses a slump cylinder with a laser transmitter. After the slump cylinder is lifted off, it is placed on the side of the sample. The laser transmitter that can move up and down emits a horizontal laser to find the point, and then reads it through the reading display device, thereby improving the accuracy and reducing the time. However, the laser transmitter of the slump cylinder emits a beam of light. When the concrete falls out of the slump cylinder, it is not a regular shape, and its highest point is often not easy to determine. Point, the reading display device must be slowly moved down along the digital display steel ruler, which is not only difficult to operate, but also difficult to see the scale in a dark environment, and it is difficult to ensure accuracy. To ensure the accuracy, the laser beam emitted by the laser transmitter must be accurately hit to the highest point, and the edge of the beam just touches the highest point. Once a light spot appears on the concrete, it is not an accurate measurement value. Therefore, although the utility model uses a digital display to replace the reading of the human eye, it cannot be simple, accurate and fast. At the same time, the slump measuring device is fixed on the slump cylinder. The device is very bulky due to the weight of the slump cylinder. When measuring the slump, the slump cylinder is lifted unevenly and scratched against the concrete, which affects the measurement. result.

Utility model content

In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of automatic slump measuring instrument based on laser emission plate ranging to solve the above problems, which is independent of the slump cylinder and does not need to be displaced. The arranged laser speed automatically finds the highest point of the concrete, and accurately reads the slump and displays it on the display screen, improving the test accuracy and speed.

To achieve the above object, the utility model provides the following technical solutions:

An automatic slump measuring instrument based on laser emission plate ranging, including a rectangular frame chassis, an electric lift, a laser emission plate, a laser receiver, a signal converter and a display screen, and the electric lift is installed on the front frame of the chassis On the upper side, the long-strip laser emitting board is connected to the lifting rod of the electric lift. Multiple laser emitting points are arranged horizontally on the laser emitting board. The laser receiver is fixed and erected on the rear frame of the chassis to receive the emission signal of the laser emitting board. The laser receiver is electrically connected to the signal converter, the signal converter is electrically connected to the electric lift, and the signal converter is connected to the display screen.

A further improved technical solution of the utility model is that two ends of the rear frame of the bottom frame are respectively erected with brackets, and the laser receiver is installed between the two brackets; The horizontal bar is connected between them, and the laser emission board is installed on the horizontal bar and faces the laser receiver.

A further improved technical solution of the present invention is that the laser emitting plate is composed of a plurality of single-point laser emitting blocks which are serially arranged in a long strip type multi-point laser emitting plate. Multiple individually arranged emitting plates can be selectively installed according to the size of the concrete sample, so as to adjust the length of the corresponding elongated laser emitting plates.

A further improved technical solution of the utility model is that the bottom of the four corners of the base frame are respectively installed with screw knobs, and the top surface of a bracket is installed with a level. By rotating the screw knobs at the four corners of the base frame, observe the spirit level and place the measuring instrument horizontally.

A further improved technical solution of the present invention is that the left and right frames of the bottom frame are respectively provided with handles. The carrying handle makes it easy to carry the analyzer.

Beneficial effects of the utility model:

The measuring instrument of the utility model is different from the existing measuring instrument and the integrated structure of the slump cylinder, which gets rid of the cumbersome defect of the traditional instrument, and is flexible and convenient. At the same time, the utility model automatically lifts the laser emitting plate, automatically adjusts the height and sends out multiple laser beams to accurately find the highest point of the concrete.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a schematic diagram of the working principle of the utility model recording initial readings.

Figure 3 is a schematic diagram of the working principle of the utility model for recording secondary readings.

Detailed ways

As shown in FIG. 1, the present invention includes a rectangular frame chassis 1, an electric lift 2, a laser emitting board 3, a laser receiver 4, a signal converter 5 and a display screen 6. The two ends of the rear frame of the chassis 1 are respectively vertical A bracket 7 is provided, and the laser receiver 4 is installed between the two brackets 7; an electric lift 2 is respectively installed at both ends of the front frame of the bottom frame 1, and a cross bar 8 is connected between the two electric lifts 2, and the laser emission board 3 consists of a plurality of The single-point laser emitting block is connected in series with a long-strip multi-point laser emitting board, installed on the cross bar 8, facing the laser receiver 4, and the laser receiver 4 is used to receive the emission signal of the laser emitting board 3. The laser receiving The device 4 is electrically connected to the signal converter 5, the signal converter 5 is then electrically connected to the electric lift 2, and the signal converter 5 is connected to the display screen 6 by a signal.

In order to facilitate adjusting the tester to be in a horizontal state, screw knobs 9 are respectively installed at the bottom of the four corners of the base frame 1 , and a level 10 is installed on the top surface of a bracket 7 .

In order to carry and install the tester, the left and right frames of the bottom frame 1 are respectively provided with handles 11 .

The specific use of this instrument is further explained below:

Connect all wires well before use, and check whether all parts are intact and working properly.

When using, first put the mixed cement mortar into the slump cylinder 12 and then vibrate it tightly, scrape off the excess mixture with a trowel, smooth the cylinder mouth, remove the concrete around the bottom of the cylinder, and place it with the cylinder as the center. Meter and adjust the screw knob to level.

Turn on the power to adjust the laser emitting plate 3 to be slightly higher than the slump cylinder, turn on the electric lift 2, and when the laser emitting plate 3 slowly descends to be completely parallel to the slump cylinder (ie, the initial concrete mortar column), the laser receiver 4 cannot receive it. The laser signal is transmitted to the signal converter 5 to control the electric lift 2 to stop automatically. At the same time, the signal converter 5 transmits the height of the laser beam on the laser emission board from the horizontal plane (the initial height of the concrete mortar column) to the display screen 6 for display. The recorded value is the initial reading H ₁ , as shown in Figure 2.

Lift the slump bucket upwards vertically, and the mortar begins to slump. When the slump is completed, press the down button of the electric lift 2, the laser emitting plate 3 descends at a constant speed, and a row of horizontal laser beams move down as a whole.

When the laser emitting board 3 descends to the slump height, as long as one beam of laser is blocked by the mortar, the signal of the laser receiver 4 changes, which is transmitted to the signal converter 5 to control the electric lift 2 to stop, and the reading on the display screen is the first. Two readings H ₂ , and the difference between the two readings is the slump height H ₃ , as shown in Figure 3 .

After measuring the slump, remove the instrument and wipe it clean, and finally clean the experimental site.

The entire measurement process needs to be controlled within 30s from adjusting the instrument level to the end of the measurement.

Claims (5)

1. An automatic slump measuring instrument based on laser emission plate ranging, characterized in that it comprises a rectangular frame chassis (1), an electric lift (2), a laser emission plate (3), and a laser receiver (4) , signal converter (5) and display screen (6), the electric lift (2) is installed on the front frame of the chassis (1), and the long-strip laser emission plate (3) is connected to the lift rod of the electric lift (2). , a plurality of laser emission points are arranged horizontally on the laser emission board (3), and the laser receiver (4) is fixed and erected on the rear frame of the chassis (1) for receiving the emission signal of the laser emission board (3). The laser receiver (4) is electrically connected to the signal converter (5), the signal converter (5) is then electrically connected to the electric lift (2), and the signal converter (5) is signally connected to the display screen (6). 2. A kind of automatic slump measuring instrument based on laser emission plate ranging according to claim 1, characterized in that: two ends of the rear frame of the underframe (1) are respectively erected with brackets (7), and the laser receiving The lifter (4) is installed between the two brackets (7); an electric lift (2) is installed at both ends of the front frame of the bottom frame (1), and a crossbar (8) is connected between the two electric lifts (2). The launch plate (3) is mounted on the crossbar (8) and faces the laser receiver (4). 3. An automatic slump measuring instrument based on laser emission plate ranging according to claim 2, characterized in that: the laser emission plate (3) consists of a plurality of single-point laser emission blocks arranged in series into a long strip Type multi-point laser emission board. 4. An automatic slump measuring instrument based on laser emission plate ranging according to claim 2, characterized in that: the bottom of the four corners of the chassis (1) are respectively installed with screw knobs (9), a bracket (7) ) top-mounted level (10). 5 . The automatic slump measuring instrument based on laser emission plate ranging according to claim 1 , characterized in that: handles ( 11 ) are respectively installed on the left and right frames of the bottom frame ( 1 ). 6 .

Images