CN112229387A

CN112229387A - Error detection device of road surface fluctuation detector

Info

Publication number: CN112229387A
Application number: CN202011189548.7A
Authority: CN
Inventors: 王珉; 唐小聪; 钱峥; 陈啟尧; 李凤娇
Original assignee: Nanjing Institute of Measurement and Testing Technology
Current assignee: Nanjing Institute of Measurement and Testing Technology
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-01-15

Abstract

The invention discloses an error detection device of a road surface fluctuation detector, a detection system and a road surface fluctuation simulation device, wherein the detection system comprises the detector, the detector is connected with a computer control system through an acquisition instrument, the detector is horizontally movably arranged on a cross beam, the road surface fluctuation simulation device comprises a conical turntable, the turntable is connected with a rotating shaft, the tail end of the rotating shaft is connected with a servo motor through a synchronous belt and a synchronous belt wheel, and the servo motor is connected with the computer control system through a servo motor driver. The device can accurately measure the error of the road surface fluctuation detector based on the laser transmitter; the pulse equivalent of the servo motor is small, and the control precision is high, so that the test of the detector cannot be influenced by system errors.

Description

Error detection device of road surface fluctuation detector

Technical Field

The present invention relates to an error detection device, and more particularly, to an error detection device for a road surface undulation detector.

Background

Different road surface conditions cause different influences on the driving of vehicles, wherein the undulating road surface is the most common, and the degree of undulation of the road surface is an important parameter for representing the road surface conditions of roads; the method is simple and convenient, but in a moving state, the laser detector is easy to jolt, the precision of the measured road surface heave height can generate errors, and the size of the errors determines the quality and the application range of the test system.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide an error detection device of a road surface fluctuation detector, which can detect the error of a road surface fluctuation test system and judge whether the test system is qualified.

The technical scheme is as follows: the invention relates to an error detection device of a road surface fluctuation detector, a detection system and a road surface fluctuation simulation device, wherein the detection system comprises the detector, the detector is connected with a computer control system through an acquisition instrument, the detector is horizontally movably arranged on a cross beam, the road surface fluctuation simulation device comprises a conical turntable, the turntable is connected with a rotating shaft, the tail end of the rotating shaft is connected with a servo motor through a synchronous belt and a synchronous belt wheel, and the servo motor is connected with the computer control system through a servo motor driver.

Wherein, the detection instrument is installed on the slider, but the slider is installed on the crossbeam with horizontal migration, the crossbeam is the ball that can the rotation on the curb plate, the slider is fixed on screw nut, the crossbeam tip is provided with rotating electrical machines, rotating electrical machines connects computer control system, be provided with the limit stop who is located carousel axis and edge top on the crossbeam, be provided with rotary encoder behind the servo motor, rotary encoder links to each other with the servo motor driver, the number of teeth of synchronous pulley is the same with the terminal number of teeth of pivot, the relation between carousel rotational speed n and the detection instrument displacement volume X is:

60V＝2πnX

wherein V is the linear velocity of the detector at the detection point on the inclined plane of the turntable.

The working principle is as follows: the detection position of the detector corresponds to the displacement of the detector, the rotating speed of the servo motor is determined by the displacement of the detector, the rotating speed of the rotary disc is equal to the rotating speed of the servo motor, the detector acquires the height of a real-time detection point on the inclined plane of the rotary disc, the height of the real-time detection point is processed by the acquisition instrument and the computer control system to obtain the undulation condition of the simulated road surface, the undulation condition is compared with the actual heights of the detection instrument and the inclined plane of the rotary disc, the error of.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: 1. the error of the road surface fluctuation detector based on the laser transmitter can be accurately measured; 2. the servo motor has small pulse equivalent and high control precision, and can effectively reduce vibration, buffer and stably transmit by adopting a synchronous belt transmission mode, so that the axial runout of the turntable can be controlled within 100 mu m, and the test of the detecting instrument is not influenced by system errors.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the relative positions of the turntable and the detecting instrument;

fig. 3 is a schematic diagram of the measurement method of the present invention.

Detailed Description

As shown in fig. 1, an error detection device of a road surface undulation detector comprises a detection system and a road surface undulation simulation device, the detection system comprises a detector 15, the detector 15 is connected with a computer control system 1 through a collecting instrument 2, the detector 15 is installed on a sliding block 20, the sliding block 20 is installed on a cross beam 16 in a horizontally movable manner, the cross beam 16 is a ball screw capable of rotating on a side plate 14, a rotating motor 17 is arranged at the end part of the cross beam 16, the rotating motor 17 is connected with the computer control system 1, the computer control system 1 controls the rotating motor 17 to rotate, the rotating motor 17 drives the ball screw to rotate, the sliding block 20 is fixed on a screw nut, the screw nut is installed on the ball screw, the sliding block 20 moves on the ball screw along with the screw nut, a linear guide rail 18 is further arranged outside the ball screw to limit the transverse movement track of the screw nut, a limit stop 19 is arranged, the limit stop 19 that is located 3 axis tops of carousel is the 15 initial points of detection instrument, the detection instrument 15 removes the back and is the displacement volume X of detection instrument 15 with the distance of initial point, road surface undulation analogue means includes conical carousel 3, its generating line and bottom surface contained angle are theta, carousel 3 is connected with pivot 6, pivot 6 is through being fixed in upper bracket 4, upper bearing 5 on the lower carriage 11, lower bearing 7 carries out circumference and axial positioning, link through the screw between pivot 6 and the carousel 3, fix a position by the locating pin, 6 terminal synchronous belts 12 and synchronous pulley 13 connection servo motor 10 of passing through of pivot 6, synchronous pulley 13 number of teeth is the same with the terminal number of teeth diameter of pivot 6, pivot 6 and servo motor 10 main shaft pass through synchronous pulley 13 and synchronous belt 12 and carry out the transmission, for 1: 1 transmission, guaranteed that pivot 6 is completely synchronous with the rotation of servo motor 10 main shaft, servo motor 10 passes through servo motor driver 8 and connects computer control system 1, servo motor 10 motor shaft rear end is provided with rotary encoder, rotary encoder links to each other with servo motor driver 8, servo motor 10 is driven by servo motor driver 8, servo motor 10 running accuracy is guaranteed by rotary encoder, every pulse signal motor that receives a certain amount of rotary encoder changes the round, servo motor 10's control accuracy is high, make carousel 3's rotation accuracy also high. The motor encoder feeds back the rotating angle and the number of turns of the servo motor 10 to the servo motor driver 8 in a pulse form, the computer control system 1 displays the specific number of turns, and the servo motor 10 is connected with the rotary table 3 through the synchronous belt 12 and the synchronous belt wheel 13, so that the number of turns displayed by the computer control system 1 is the number of turns of the rotary table 3. Writing a command that the displacement X of the detector 15 is coupled with the rotating speed N of the servo motor 10 in the computer control system 1, wherein the command is 60V-2 pi NX, wherein V is the linear speed of the detector 15 at a detection point on the inclined plane of the turntable 3, and is preset and selectable in size; x is the displacement amount of the detector 15; n is the rotation speed of the servo motor 10, where N is the rotation speed of the turntable 3, and the computer control system 1 adjusts the rotation speed N of the servo motor 10 in real time according to the rotation speed N of the servo motor 10 obtained by the coupling command according to the real-time displacement X of the detecting instrument 15, so as to keep the real-time linear speed V at the detection position of the detecting instrument 15 on the turntable 3 constant.

The displacement X of the detector 15 is artificially controlled by the computer control system 1, and then according to the number of turns Q displayed by the computer control system 1, the displacement X is calculated by the formula: l is 2 pi XQ, and the total length L of the simulated undulating road surface detected by the detector 15 can be obtained.

The fluctuation data acquired by the detector 15 is transmitted to the computer control system 1 for processing through the acquisition instrument 2, and the fluctuation height h detected by the detector 15 at the detection point on the inclined plane can be obtained. By the formula: h0 is H + Xtan θ, and the actual height H of the probe 15 from the detection point of the slope can be calculated₀. The actual height h and the detection height h are compared₀Comparing the relative difference delta h-h₀I.e. the measurement error of the detector 15. If the measurement error Δ is within a predetermined reasonable range, it indicates that the accuracy of the detecting device 15 meets the working requirement.

Claims

1. The utility model provides an error detection device of road surface undulation detector, its characterized in that, includes detecting system and road surface undulation analogue means, detecting system includes detecting instrument (15), detecting instrument (15) link to each other through gathering appearance (2) and computer control system (1), but detecting instrument (15) horizontal migration ground installs on crossbeam (16), road surface undulation analogue means includes conical carousel (3), carousel (3) are connected with pivot (6), servo motor (10) are connected through hold-in range (12) and synchronous pulley (13) to pivot (6) end, servo motor (10) are through servo motor driver (8) connection computer control system (1).

2. The error detecting device of a road surface undulation detector according to claim 1, characterized in that the detector (15) is mounted on a slider (20), the slider (20) being horizontally movably mounted on the cross beam (16).

3. The error detecting device of a road surface undulation detector according to claim 2, wherein the cross member (16) is a ball screw rotatable on the side plate (14), and the slider (20) is fixed to a screw nut.

4. The error detection device of a road surface undulation detector according to claim 3, characterized in that the end of the cross beam (16) is provided with a rotating motor (17), and the rotating motor (17) is connected with the computer control system (1).

5. The error detection device of a road surface undulation detector according to any of claims 1 to 4, characterized in that the cross beam (16) is provided with limit stops (19) located above the axis and edge of the turntable (3).

6. The error detection device of a road surface undulation detector according to claim 1, characterized in that a rotary encoder is provided behind the servo motor (10), the rotary encoder being connected to the servo motor driver (8).

7. The error detecting device of a road surface undulation detector according to claim 1, wherein the number of teeth of the synchronous pulley (13) is the same as the number of teeth of the end of the rotating shaft (6).

8. The error detection device of a road surface undulation detector according to claim 1, characterized in that the relationship between the rotation speed n of the turntable (3) and the displacement X of the detector (15) is:

60V＝2πnX

wherein V is the linear velocity of the detector (15) at the detection point on the inclined plane of the turntable (3).