CN216668610U - Roller diameter detection device based on laser velocimeter - Google Patents

Abstract

The utility model discloses a roller diameter detection device based on a laser velocimeter, which belongs to the field of roller detection. According to the roller diameter detection device based on the laser velocimeter, the rapid detection of the diameter of the roller to be detected is completed in a combined mode by utilizing the corresponding measurement of the angular speed and the linear speed when the roller rotates, the traditional manual measurement mode is effectively replaced, the detection efficiency is effectively improved, the roller diameter detection precision is improved, the roller diameter measurement error is reduced, and the roller diameter detection device has good practical value and application prospect.

Description

Roller diameter detection device based on laser velocimeter

Technical Field

The utility model belongs to the field of roller detection, and particularly relates to a roller diameter detection device based on a laser velocimeter.

Background

With the popularization of taxis and the increasing living standard of people, the frequency of carrying taxis by people is gradually increased, the integral price of the taxies is mostly determined by the kilometer number calculated in the taximeter and the unit price of each kilometer, but after the taximeter is put into practical use for a long time, the displayed kilometer number is easy to generate errors, so that the taximeter needs to be regularly measured and verified, and the errors of the taximeter are corrected.

At present, the taximeter is mainly calibrated by matching a roller type calibrating device with wheels of a vehicle. Generally, the roller type verification device comprises a pair of rollers, namely a main roller and an auxiliary roller, the running distance of the automobile is calculated by calculating the number of rotation turns and the circumference of a driving wheel by utilizing the rotation of the automobile wheels between every two rollers, and finally the running distance is compared with the number of kilometers on the taximeter, so that whether an error exists in the taximeter is judged.

However, after the main roller is used for a long time, the surface of the main roller is easily abraded and deformed, so that the radius of the main roller is changed, and the accuracy of the detection result is directly influenced. Therefore, in the use process of the roller type calibrating device, the diameters of the main roller and the auxiliary roller need to be measured periodically, and the diameters of the main roller and the auxiliary roller can meet the requirement of standard detection. In the existing detection process, the mode that more applications are manual detection, namely the circumference of the main roller is measured manually in a mode that a tape measure is wound around the main roller for a circle, or the diameter of the main roller is measured through a caliper. Although the above mode can realize the measurement of the diameter of the main roller to a certain extent, the measurement precision is poor, the requirement on the operation level of a measurer is high, a large measurement error exists, the diameter detection process of the main roller cannot be accurately finished, the taximeter calibration difficulty is increased, and the calibration cost is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at one or more of the defects or the improvement requirements in the prior art, the utility model provides the roller diameter detection device based on the laser velocimeter, which can realize accurate measurement of the diameter of the main roller, reduce the measurement error and improve the measurement efficiency.

In order to achieve the aim, the utility model provides a roller diameter detection device based on a laser velocimeter, which comprises a linear velocity measurement mechanism, an angular velocity measurement mechanism and a target;

the linear velocity measuring mechanism comprises a laser velocimeter which is arranged right opposite to the roller to be measured and is used for emitting laser measuring beams to the periphery of the roller to be measured when the roller to be measured rotates and measuring the tangential linear velocity of the corresponding point position of the periphery of the roller to be measured;

the angular velocity measuring mechanism is arranged on one side of the roller to be detected and used for identifying the target arranged on the periphery or the end face of the roller to be detected and obtaining the angular velocity of the roller to be detected according to the time spent in the two adjacent identification processes.

As a further improvement of the utility model, the axis of the roller to be measured is horizontally arranged, and a mounting bracket is arranged corresponding to the linear velocity measuring mechanism;

the mounting bracket is arranged on two sides of the roller to be tested in a spanning mode.

As a further improvement of the utility model, the bottom of the mounting bracket is movably arranged;

and/or

And the mounting bracket is provided with a lifting mechanism, so that the linear velocity measuring mechanism can be driven by the mounting bracket to lift in a reciprocating manner.

As a further improvement of the utility model, an XY axis moving mechanism is arranged on the mounting bracket;

the linear velocity measuring mechanism is arranged on the XY axis moving mechanism and can carry out horizontal displacement on an XY axis plane under the drive of the XY axis moving mechanism.

As a further improvement of the utility model, the angular velocity measuring mechanism is mounted on a tripod placed on the ground beside the roller to be measured for supporting and aligning the angular velocity measuring mechanism with the target.

As a further improvement of the present invention, the linear velocity measuring mechanism further includes a laser distance meter for measuring a distance between the linear velocity measuring mechanism and the outer peripheral surface of the roller to be measured.

As a further improvement of the present invention, the angular velocity measuring mechanism includes a timer and a laser transmitter and a laser receiver provided corresponding to each other;

the laser transmitter is used for emitting a laser beam to the target, and the laser receiver is used for receiving the laser beam reflected by the target;

the timer is electrically connected with the laser receiver and used for measuring the time spent by the laser receiver for detecting the two laser beams.

As a further improvement of the utility model, the roller to be tested is a standard wheel for detecting the diameter of the automobile wheel, the roller to be tested is horizontally arranged in the ground pit, and the top of the roller to be tested protrudes out of the ground.

As a further improvement of the utility model, the target is fixedly arranged or detachably arranged on the roller to be detected.

As a further improvement of the utility model, a containing groove is formed on the surface or the end face of the roller wheel to be detected, and the target is contained in the containing groove;

or the target is a magnetic attraction unit which can be magnetically attached to the surface or the end face of the roller to be detected.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the technical scheme conceived by the utility model has the following beneficial effects:

(1) according to the roller diameter detection device based on the laser velocimeter, the angular velocity measurement mechanism and the linear velocity measurement mechanism are arranged aiming at the combination of the roller to be detected, so that when the roller to be detected rotates, the linear velocity measurement mechanism can detect the tangential linear velocity on the outer peripheral surface of the roller to be detected, and the angular velocity measurement mechanism can detect the angular velocity of the roller to be detected by matching with the target, so that the detection of the outer peripheral diameter of the roller to be detected is completed.

(2) According to the roller diameter detection device based on the laser velocimeter, the mounting support is arranged aiming at the linear velocity measuring mechanism, and the XY-axis moving mechanism is arranged on the mounting support in a matching manner, so that the linear velocity measuring mechanism can horizontally move on an XY-axis plane under the driving of the XY-axis moving mechanism, the position of the linear velocity measuring mechanism is adjusted, the positioning of the linear velocity measuring mechanism above the roller to be detected can be facilitated, different positions on the outer peripheral surface of the roller to be detected can be detected by adjusting the position of the linear velocity measuring mechanism, the distance between the linear velocity measuring mechanism and the top of the roller to be detected can be adjusted through the mounting support capable of vertically lifting, and therefore the device can be suitable for rollers with different diameters, and the application range is wider.

(3) According to the roller diameter detection device based on the laser velocimeter, due to different arrangement forms of the targets on the roller to be detected, the working personnel can select the arrangement modes of the different targets according to the use requirements, and the targets can be directly fixed or detachably arranged on the roller to be detected so as to meet different use requirements.

(4) According to the roller diameter detection device based on the laser velocimeter, the angular velocity and the linear velocity of the roller to be detected are detected through the angular velocity measurement mechanism and the linear velocity measurement mechanism, the diameter of the roller to be detected is calculated through the detection result, the traditional manual measurement mode is replaced, the detection efficiency is effectively improved, the roller diameter detection precision is improved, the roller diameter measurement error is reduced, and the roller diameter detection device has good practical value and application prospect.

Drawings

FIG. 1 is a front sectional view of a roller diameter detecting device based on a laser velocimeter in an embodiment of the present invention;

FIG. 2 is a cross-sectional side view of a laser velocimeter-based roller diameter detection device in an embodiment of the present invention;

FIG. 3 is a front view of a laser velocimeter-based roller diameter detection device in an embodiment of the present invention;

FIG. 4 is a drawing of a target assembly of the roller diameter detection device in an embodiment of the present invention;

FIG. 5 is a sectional view of the adsorption type target of the roller diameter detecting apparatus according to the embodiment of the present invention;

in all the figures, the same reference numerals denote the same features, in particular:

1. a ground surface; 2. mounting a bracket; 3. an XY-axis moving mechanism; 31. an X-axis moving assembly; 32. a Y-axis moving assembly; 4. a linear velocity measuring mechanism; 5. an angular velocity measuring mechanism; 51. a laser receiver; 52. a laser transmitter; 6. a tripod; 7. a drive shaft; 8. a roller to be tested; 81. a thread groove; 82. a magnetic outer ring; 9. a target; 91. a screw; 92. a magnetic strip.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

referring to fig. 1, 2 and 3, in the roller diameter detection device based on the laser velocimeter in the preferred embodiment of the present invention, the detection device is provided with a linear velocity measurement mechanism 4, an angular velocity measurement mechanism 5 and a target 9 disposed on a roller 8 to be measured, the linear velocity measurement mechanism 4 is disposed opposite to the roller 8 to be measured for measuring a linear velocity in a tangential direction of an outer peripheral surface of the roller 8 to be measured, the angular velocity measurement mechanism 5 is configured to identify the target 9 on the roller 8 to be measured, and measure an angular velocity of the roller 8 to be measured according to time elapsed from two adjacent identification processes, so as to calculate a diameter of a measured position of the roller 8 to be measured by combining the angular velocity and the linear velocity of the roller 8 to be measured.

In a specific application scenario, the roller 8 to be measured is a standard wheel for measuring the diameter of a tire, the axis of the roller 8 to be measured is horizontally arranged, the driving shaft 7 is arranged in the roller 8 to be measured and used for being connected with an external transmission mechanism and driving the roller 8 to be measured to rotate, the roller 8 to be measured is arranged in a pit formed in the bottom of the ground 1, the top of the roller 8 to be measured protrudes out of the ground 1, the linear velocity measuring mechanism 4 is arranged above the roller 8 to be measured and is over against the top of the roller 8 to be measured, and the angular velocity measuring mechanism 5 is directly placed on the ground 1.

In the following, the technical solution in the preferred embodiment is described with reference to the diameter detection process of the roller 8 to be detected in the application scenario.

In the preferred embodiment, the linear velocity measuring mechanism 4 is mounted on a mounting bracket 2 that spans the roller 8 to be measured, thereby enabling the linear velocity measuring mechanism 4 to be positioned above the roller 8 to be measured.

In more detail, in the above preferred embodiment, the bottom of the mounting bracket 2 is movably disposed, for example, universal wheels are disposed at the bottom of the mounting bracket 2, so as to drive the mounting bracket 2 to move. Meanwhile, the mounting bracket 2 can be set to be a bracket capable of lifting vertically on the basis, the lifting structure can be preferably set to be a sleeve type lifting structure as shown in fig. 1, and the vertical height of the linear velocity measuring mechanism 4 can be changed through vertical lifting adjustment of the mounting bracket 2, so that the linear velocity measuring mechanism 4 can not only be aligned with different parts of the roller 8 to be measured, but also be effectively suitable for rollers with different diameters, and the application range of the equipment is wider.

Further, in the preferred embodiment as shown in fig. 1 and 2, an XY-axis moving mechanism 3 is further provided on the mounting bracket 2, and accordingly, a linear velocity measuring mechanism 4 is provided at the bottom of the XY-axis moving mechanism 3. The position of the linear velocity measuring mechanism 4 above the roller 8 to be measured can be correspondingly adjusted through the large hole of the XY axis moving mechanism 3, so that the linear velocity measuring mechanism 4 can align different positions of the surface of the roller 8 to be measured, the diameters of different areas in the axial direction of the roller 8 to be measured are completely measured, and the accuracy of a measuring result is ensured. It should be noted that the XY-axis moving mechanism 3 is composed of an X-axis moving component 31 and a Y-axis moving component 32, and the specific settings of both of them can be quickly implemented by the prior art, so the details are not described herein.

Further, the linear velocity measuring mechanism 4 in the preferred embodiment comprises a laser velocimeter, which detects the tangential linear velocity of the top of the roller 8 to be measured. Meanwhile, in a specific preferred embodiment, the linear velocity measuring mechanism 4 is further provided with a laser range finder for detecting the distance between the laser range finder and the roller 8 to be measured, so that the determination of the speed measurement position of the roller 8 to be measured is rapidly realized, and the accuracy of the detection position of the linear velocity measuring mechanism 4 is ensured. In practical use, the laser velocimeter and the laser rangefinder may both adopt the mature technologies in the prior art, and therefore, the detailed description thereof is omitted here.

As shown in fig. 1 and 2, the angular velocity measuring mechanism 5 in the preferred embodiment is supported on the ground 1 on the side of the roller 8 to be measured by a tripod 6, and the setting position thereof can be flexibly adjusted to ensure that the angular velocity measuring mechanism 5 can be quickly aligned with the target 9 in actual use.

Specifically, the angular velocity measuring mechanism 5 in the preferred embodiment includes a laser emitter 52, a laser receiver 51, and a timer, and the laser emitter 52 is capable of emitting incident light to the surface of the wheel 8 under test, and the incident light is reflected by the target 9 provided on the surface of the wheel 8 under test and finally received by the laser receiver 51, thereby identifying the position of the target 9. The position of the target 9 is detected twice, and the rotation angular speed of the roller 8 to be detected can be accurately obtained by combining the time of detection twice.

Further, in the preferred embodiment as shown in fig. 1 and 2, the target 9 is fixedly disposed on the surface of the roller 8 to be measured, and the angular velocity measuring mechanism 5 is disposed on one side thereof.

In a specific embodiment, the target 9 is fixed to the outer circumferential surface of the roller 8 to be measured by means of plastic sealing. Of course, it is understood that, in the actual installation process, the installation manner of the target 9 includes, but is not limited to, the above-mentioned manner of plastic encapsulation, and may also be installed on the outer peripheral surface of the roller under test 8 by other fixing manners, such as welding, adhering, and the like, as long as it is ensured that the target 9 can be stably fixed on the outer peripheral surface of the roller under test 8.

Further, in the preferred embodiment shown in fig. 4 and 5, the target 9 can be removably fixed to the end surface or the outer peripheral surface of the roller 8 to be measured, so that the target 9 can be removed from the roller 8 to be measured when not in use, thereby prolonging the service life of the target 9, and facilitating the replacement of the target 9 after being damaged.

In a specific embodiment, a screw 91 is provided corresponding to the target 9, the target 9 is provided on an end of the screw 91, and correspondingly, the thread groove 81 on the side end face of the roller 8 to be tested is connected with the screw 91 in a threaded connection manner, as shown in fig. 4, so that the target 9 is installed in the threaded connection manner, thereby facilitating subsequent replacement of the target 9, and simultaneously ensuring the stability of the target 9 after installation, and preventing the target 9 from falling off when the roller 8 to be tested rotates.

In another specific embodiment, a magnetic stripe 92 is disposed corresponding to the target 9, and correspondingly, the surface of the roller 8 to be measured is disposed with a magnetic outer ring 82, as shown in fig. 5, so that the target 9 can be magnetically fixed on the magnetic outer ring 82, thereby rapidly installing the target 9 and facilitating subsequent replacement.

It can be seen that, when the wheel 8 rotates once, the target 9 reflects the incident light once, so that the laser receiver 51 receives a pulse signal once. On the basis, the time difference of the two adjacent pulse signals received is calculated by measuring the pulse times N in the time T, and the calculation of the angular speed of the roller 8 to be measured is completed by the following formula on the basis.

In the preferred embodiment, T is the time T from the time when the rising edge of the first pulse signal is received₁Until the time t of receiving the rising edge of the Nth pulse signal₂The time interval of (c). At this time, the angular velocity of the roller 8 to be measured at the time t is:

in the formula, ω_τThe instantaneous angular speed of the main roller at the time of tau, and Ν is the number of pulses received by the rotation angle measuring unit.

Meanwhile, the instant linear velocity v of the surface of the roller 8 to be measured at the moment t_tIs as follows;

in the formula, f_DtThe laser frequency generated by the surface motion of the roller at the time t is shown as lambda, the light source wavelength of the LDV and theta, the included angle between two beams of incident light. Then at t₁-t₂In the moment, the length that the gyro wheel rotated is:

from the formula v ═ ω · R:

v·T＝ω·T·R (4)

by combining the formula (1), the formula (2), the formula (3) and the formula (4), the diameter D of the roller is as follows:

in the formula, R is the radius of the roller 8 to be measured.

The diameter of the roller 8 to be measured at a certain position in the axial direction can be obtained by correspondingly measuring the linear velocity and the angular velocity in the rotation process of the roller 8 to be measured and combining the calculation of the formula. Meanwhile, the diameters of the roller 8 to be measured at different axial positions can be obtained by correspondingly measuring the parameters at different axial positions of the roller 8 to be measured and combining the corresponding calculation in the formula, so that the overall size of the roller 8 to be measured is obtained, and whether the roller 8 to be measured is abraded or deformed at each position is accurately judged.

According to the roller diameter detection device based on the laser velocimeter, the measurement result of the roller to be measured is calculated through the angular velocity measurement mechanism and the linear velocity measurement mechanism, so that the diameter of the roller to be measured is calculated, the traditional manual measurement mode is replaced, the overall measurement precision is high, the error is small, the application range is wide, the rollers to be measured with different diameters and different positions can be measured only by moving the position of the device, and the roller diameter detection device based on the laser velocimeter has good practical value and application prospect.

It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the utility model to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the utility model are possible and within the scope of the appended claims.

Claims (10)

1. A roller diameter detection device based on a laser velocimeter is characterized by comprising a linear velocity measurement mechanism, an angular velocity measurement mechanism and a target;

the linear velocity measuring mechanism comprises a laser velocimeter which is arranged right opposite to the roller to be measured and is used for emitting laser measuring beams to the periphery of the roller to be measured when the roller to be measured rotates and measuring the tangential linear velocity of the corresponding point position of the periphery of the roller to be measured;

the angular velocity measuring mechanism is arranged on one side of the roller to be measured and used for identifying the target arranged on the periphery or the end face of the roller to be measured and obtaining the angular velocity of the roller to be measured according to the time spent in the two adjacent identification processes.

2. The laser velocimeter-based roller diameter detection device according to claim 1, wherein the axis of the roller to be measured is horizontally disposed, and a mounting bracket is provided corresponding to the linear velocity measuring mechanism;

the mounting bracket is arranged on two sides of the roller to be tested in a spanning mode.

3. The laser velocimeter-based roller diameter detection device of claim 2, wherein a bottom portion of the mounting bracket is movably disposed;

and/or

And the mounting bracket is provided with a lifting mechanism, so that the linear velocity measuring mechanism can be driven by the mounting bracket to lift in a reciprocating manner.

4. The laser velocimeter-based roller diameter detection device of claim 2, wherein an XY axis movement mechanism is provided on the mounting bracket;

the linear velocity measuring mechanism is arranged on the XY axis moving mechanism and can carry out horizontal displacement on an XY axis plane under the driving of the XY axis moving mechanism.

5. The laser velocimeter-based roller diameter detection device of claim 1, wherein the angular velocity measurement mechanism is mounted on a tripod placed on the ground beside the roller under test for supporting and aligning the angular velocity measurement mechanism with the target.

6. The laser velocimeter-based roller diameter detection device of claim 4, wherein the linear velocity measuring mechanism further comprises a laser range finder for determining the distance of the linear velocity measuring mechanism from the outer peripheral surface of the roller under test.

7. The laser velocimeter-based roller diameter detection device of claim 1, wherein the angular velocity measurement mechanism comprises a timer and a laser transmitter, a laser receiver disposed in correspondence with each other;

the laser transmitter is used for emitting a laser beam to the target, and the laser receiver is used for receiving the laser beam reflected by the target;

the timer is electrically connected with the laser receiver and used for measuring the time spent by the laser receiver for detecting the two laser beams.

8. The laser velocimeter-based roller diameter detection device according to claim 1, wherein the roller to be measured is a standard wheel for calibrating the diameter of a wheel of an automobile, and is horizontally disposed in a pit of the ground, and the top of the roller to be measured protrudes from the ground.

9. The roller diameter detection device based on the laser velocimeter of any one of claims 1 to 6, wherein the target is fixedly or detachably arranged on the roller to be measured.

10. The laser velocimeter-based roller diameter detection device of claim 9, wherein,

a containing groove is formed in the surface or the end face of the roller wheel to be detected, and the target is contained in the containing groove;

or the target is a magnetic attraction unit which can be magnetically attached to the surface or the end face of the roller to be detected.

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