CN215217520U - Calibration device for low-working-surface direct-drive laser pavement structure depth instrument - Google Patents

Abstract

The utility model provides a low working face directly drives laser road surface structure degree of depth appearance calibrating device which characterized in that: comprises a height adjusting column, a turntable, a threaded shaft and a machine body; the machine body is sequentially connected with a flange plate and a rotary table through a threaded shaft; the machine body is connected with a direct drive motor through a screw, and the direct drive motor is connected to the flange plate through a screw; three raised positioning holes are reserved on the flange plate and matched with the positioning grooves recessed in the turntable; the machine body is provided with a height adjusting column; the aircraft body is provided with power line aviation plug mounting holes, and the aircraft body is provided with coding line aviation plug mounting holes. This device is guaranteeing to export under the equal condition of rotational speed and power grade, has effectively reduced the working face, the height of carousel top surface promptly, has reduced implementation personnel and has promoted the operation that takes laser measuring instrument to detect the car pad height vehicle chassis, has promoted measurement of efficiency, has reduced measuring risk.

Description

Calibration device for low-working-surface direct-drive laser pavement structure depth instrument

Technical Field

This device belongs to road surface structure degree of depth test field.

Background

The road surface structure depth refers to the average depth of uneven open pores on the road surface with a certain area, is mainly used for evaluating the macro roughness, the drainage performance and the skid resistance of the road surface, and is closely related to the durability of the road surface and the driving safety.

At present, the pavement structure depth test methods mainly comprise two methods: sanding and laser texture depth gauge measurements.

The sand paving method is characterized in that standard sand with a known volume is paved on a tested area of a road surface to be tested, then the volume of the standard sand is divided by the area paved on the tested road surface, and the average depth is obtained and used as the road surface structure depth. This test method results in an average depth value within the paved area.

In the laser structure depth gauge measuring method, a laser range finder with tiny light spots is adopted for intensive sampling along the driving direction, and a longitudinal section curve is obtained. And then, calculating a constructed depth value according to the constructed depth calculation model. The Depth value of the structure adopted in China is generally expressed by Laser Measured Texture Depth (LMTD).

The sand paving method can only carry out sampling detection, and is greatly influenced by the shape of a sand paving area, so that the measurement result has larger uncertainty and larger error. In addition, because of the adverse conditions of slow speed, low efficiency, large influence of human factors and the like, the traffic is required to be blocked when the traffic is detected on a traffic road, and the safety of operators is greatly threatened, so that the traffic safety inspection device is rarely used at present.

The method for measuring the structural depth by adopting the laser structural depth instrument has the advantages of high testing speed, high efficiency, no need of traffic blockage and the like. At present, the method is widely popularized in China. The method has clear requirements in standard specifications such as road subgrade and road surface field test regulations (JTG E60-2008) and multifunctional road condition rapid detection equipment (GB/T26764-2011).

At present, the laser structure depth gauge serving as a special measuring instrument for the traffic industry cannot be fully developed in the quantity value tracing work. The quantity tracing of the instruments and the equipment in the industry generally adopts a management system of metrological verification, and the instruments and the equipment must have a tight quantity tracing chain. Therefore, it is necessary to establish a scientific and perfect measuring standard of the road laser structure depth gauge and realize the value tracing of the road laser structure depth gauge as soon as possible.

In the laser structure depth gauge measuring method, a laser range finder with tiny light spots is adopted for intensive sampling along the driving direction, and a longitudinal section curve is obtained. And then, calculating a constructed depth value according to the constructed depth calculation model. The Depth value of the structure adopted in China is generally expressed by Laser Measured Texture Depth (LMTD).

CN201410234665.9 discloses a calibration method and device for a laser road surface structure depth instrument, which overcome the defect that the current laser structure depth instrument has no strict magnitude plastic source chain. The calibration method comprises the following steps: driving the test piece to move; obtaining the motion speed of a measuring point on the measured surface of the test piece; driving a distance encoder in the laser pavement structure depth meter to rotate according to the movement speed of the measuring point; generating a laser ranging trigger signal according to the laser ranging sampling interval and the real-time rotating speed of the distance encoder for rotating; receiving a texture depth value of the measured surface of the test piece fed back by the laser pavement texture depth instrument according to the laser ranging trigger signal; and comparing the constructed depth measurement value by adopting the constructed depth reference value of the measured surface on the test piece to obtain the calibration result of the laser constructed depth instrument. Embodiments of the present application may be used to store and transmit road surface laser formation depth measurements to calculate an error between a calibrated laser formation depth gauge measurement and a reference value.

Disclosure of Invention

The working face (rotary table) of the existing equipment is high, the use of a laser measuring point is influenced, and during actual use, a chassis of a test vehicle needs to be heightened by using cushion blocks so as to facilitate measurement.

In order to solve the problems, the low working face direct-drive laser pavement structure depth instrument calibration device is characterized in that:

comprises a height adjusting column, a turntable, a threaded shaft and a machine body. The machine body is sequentially connected with a flange plate and a rotary table through a threaded shaft; the machine body is connected with the direct drive motor through screws, and the direct drive motor is connected to the flange plate through screws. Three raised positioning holes are reserved on the flange plate, so that the flange plate can be conveniently matched with the positioning grooves recessed in the rotary table.

The machine body is provided with a height adjusting column; the aircraft body is provided with power line aviation plug mounting holes, and the aircraft body is provided with coding line aviation plug mounting holes.

The power line is used for transmitting a rotation signal of the direct drive motor, and the coding line is used for feeding back a motor rotation speed signal.

2. Further, the clearance between the rotary table and the machine body is controlled to be 3-4 mm,

3. further, when in use, the threaded shaft is required to be provided with a nut. The turnplate can be taken down after the nut is screwed off. During normal operation, the nut can be continuously locked in the rotating direction of the turntable to prevent the turntable from flying out.

4. Furthermore, the machine body is of an approximate triangular structure, so that the main body of the equipment is ensured not to shake when running at high speed.

5. Furthermore, weight-reducing grooves are designed at each vertex of the machine body, so that weight-reducing cutting surfaces are reserved.

(1) The utility model provides a low working face directly drives laser road surface structure degree of depth appearance calibrating device adopts and directly drives the motor design, the reduction gear has been adopted in the traditional equipment, the conveyer belt, the hold-in range, gear coupling, complex construction such as worm gear cooperation, choose the volume for use and directly drive the motor that traditional servo motor is littleer, under the equal condition of assurance output speed and power grade, the working face has effectively been reduced, the height of carousel top surface promptly, the operation that implementation personnel promoted to take laser measuring instrument to detect the car pad height vehicle chassis has been reduced, the measurement of efficiency has been promoted, the risk of measurement has been reduced.

(2) The rotation directions of the top locking screw and the turntable are opposite, so that the safety of the system is ensured.

(3) The triangular supporting leg structure is adopted, the stability of high-speed rotation of the equipment is guaranteed, and the height of a working surface can be conveniently adjusted.

(4) The equipment selects the PLC as a main controller, selects a direct drive motor with a coding speed feedback function, has the highest rotating speed of 2500r/min, can accurately adjust the rotating speed of the turntable, and has the rotating speed precision of +/-5 r/min.

Drawings

FIG. 1 is a schematic view of the structure of the device.

Figure 2 is a top view of the device,

figure 3 is a bottom view of the device,

figure 4 is a side view of the device,

figure 5 is an exploded view of the apparatus,

fig. 6 is a system diagram.

Detailed Description

The device 1 is a height adjusting column, 2 is a turntable, 3 is a threaded shaft, and 4 is a machine body. When the device is used, a nut needs to be installed at the threaded shaft. The turnplate can be taken down after the nut is screwed off. When the normal equipment runs, the nut can be continuously locked in the rotating direction of the turntable to prevent the turntable from flying out. The fuselage is approximate triangle-shaped structure, guarantees not rocking when the high-speed operation of equipment main part, improve equipment stability.

Fig. 2 is the plan view, and 5 is the clearance between carousel and equipment, and because of the carousel size and specification is fixed, for controlgear main part volume, clearance control is between 3 ~ 4mm, when the accident appears, cooperates the altitude mixture control post, can prevent carousel side direction departure.

Fig. 3 is a bottom view, 6 is a weight-reduced cutting surface, and 7 is a set screw. Because the equipment is made of cast iron materials, the density is high, manual carrying is needed, the weight of the equipment is reduced as much as possible under the condition of ensuring high-speed rotation stability, and weight reduction grooves are designed at all vertexes of the machine body, so that weight reduction cutting surfaces are reserved. The fixing screw is used for fixing the direct drive motor of the equipment, and the direct drive motor is provided with a corresponding screw hole matched with the screw hole.

Fig. 4 is a side view, 8 is a power line aviation plug mounting hole, and 9 is a code line aviation plug mounting hole. The power line is used for transmitting a rotation signal of the direct drive motor, and the coding line is used for feeding back a motor rotation speed signal.

Fig. 5 is an equipment explosion diagram, 2 is a turntable, 10 is a flange plate, 11 is a direct drive motor, a machine body is connected with the direct drive motor through screws, and the direct drive motor is connected to the flange plate through screws. Three raised positioning holes are reserved on the flange plate, so that the flange plate can be conveniently matched with the positioning grooves recessed in the rotary table. The flange plate is of an aluminum structure, so that the strength is high and the required precision is high.

Fig. 6 is a system diagram.

The system realizes man-machine interaction through the touch screen, and realizes speed detection and operation mode selection. The system uses the PLC as a main controller, conversion from digital quantity to analog quantity is completed through the D/A module, the direct drive motor driver receives 1-5V voltage signals, the direct drive motor is controlled through a power line, and a feedback line receives real-time speed signals, so that the rotation speed precision of the motor is ensured.

(1) The utility model provides a low working face directly drives laser road surface structure degree of depth appearance calibrating device adopts and directly drives the motor design, the reduction gear has been adopted in the traditional equipment, the conveyer belt, the hold-in range, gear coupling, complex construction such as worm gear cooperation, choose the volume for use and directly drive the motor that traditional servo motor is littleer, under the equal condition of assurance output speed and power grade, the working face has effectively been reduced, the height of carousel top surface promptly, the operation that implementation personnel promoted to take laser measuring instrument to detect the car pad height vehicle chassis has been reduced, the measurement of efficiency has been promoted, the risk of measurement has been reduced.

(2) The rotation directions of the top locking screw and the turntable are opposite, so that the safety of the system is ensured.

(3) The triangular supporting leg structure is adopted, the stability of high-speed rotation of the equipment is guaranteed, and the height of a working surface can be conveniently adjusted.

(4) The equipment selects the PLC as a main controller, selects a direct drive motor with a coding speed feedback function, has the highest rotating speed of 2500r/min, can accurately adjust the rotating speed of the turntable, and has the rotating speed precision of +/-5 r/min.

The motor can be a stepping motor and an encoder feedback.

Claims (3)

1. The utility model provides a low working face directly drives laser road surface structure degree of depth appearance calibrating device which characterized in that:

comprises a height adjusting column, a turntable, a threaded shaft and a machine body; the machine body is sequentially connected with a flange plate and a rotary table through a threaded shaft; the machine body is connected with a direct drive motor through a screw, and the direct drive motor is connected to the flange plate through a screw; three raised positioning holes are reserved on the flange plate and matched with the positioning grooves recessed in the turntable;

the machine body is provided with a height adjusting column; the aircraft body is provided with power line aviation plug mounting holes, and the aircraft body is provided with coding line aviation plug mounting holes.

2. The apparatus of claim 1, wherein: the clearance between the rotary table and the machine body is controlled to be 3-4 mm.

3. The apparatus of claim 1, wherein: weight-reducing slots are designed at each vertex of the fuselage.

Images