Roller distance measuring device

Abstract

The utility model belongs to the technical field of automobile detection, and particularly relates to a roller distance measuring device. The roller distance measuring device comprises a supporting frame, a roller assembly, a rotating speed sensor and a measuring assembly. The roller assembly comprises a first roller and a second roller, the first roller and the second roller are arranged on the supporting frame in a spaced mode, driving wheels of a to-be-detected vehicle can abut against the turnover faces of the first roller and the second roller, the first roller can be driven to rotate to drive the driving wheels to rotate so as to drive the second roller to rotate, and the number of the driving wheels is two. Two groups of roller assemblies are oppositely arranged; the rotating speed sensor is arranged on the first roller and used for measuring the rotating speed of the first roller; the measuring assembly is used for measuring the number of rotation turns of the driving wheel. The number of rotation turns of the driving wheel is measured independently to calculate the rotation distance of the first roller, so that deviation between the rotation distance of the first roller and the actual driving distance of the driving wheel caused by slipping of the driving wheel is avoided, and the accuracy of calculating the corrected value of the driving wheel is improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile detection, in particular to a roller distance measuring device. Background Art

[0002] In the prior art, the taximeter error detection is performed on a roller distance measuring device composed of a roller, a control system and a frame. During the detection operation, the taxi driving wheel is mounted on the roller, and the roller is driven by the control system to rotate. The rotation of the roller drives the taxi driving wheel to rotate synchronously, thereby simulating the driving state of the taxi; the mileage of the roller rotation can be obtained by measuring the number of rotations of the roller, and the mileage measurement value of the taximeter is compared with the mileage measurement value of the taximeter to realize the detection of the taximeter error.

[0003] Since there is a difference between using a roller to detect and actually driving on the ground, it is necessary to calculate the tire correction value of the driving wheel based on the linear relationship between the driving wheel driving on the ground and on the roller distance measuring device. In the prior art, the driving wheel is placed on a roller, and the roller is controlled to rotate an integer number of circles (to facilitate calculation of the rolling distance). The rolling distance of the roller is the driving distance of the driving wheel on the roller distance measuring device.

[0004] However, in the actual process of detecting the tire correction value, the driving wheels of some taxis have a relatively large degree of tire tread wear due to long-term driving. When the driving wheels are rotated by the roller, the driving wheels will slip on the roller, resulting in a deviation between the rolling distance of the roller and the driving distance of the taxi driving wheels. In addition, since it is difficult for the roller to maintain an integer number of rotations when rotating, it is often necessary to manually use a belt to fine-tune the roller, which is prone to human errors and affects the accuracy of calculating the driving wheel correction value. Utility Model Content

[0005] The purpose of the utility model is to provide a roller distance measuring device to solve the problem in the prior art that the driving wheel may slip on the roller, resulting in a deviation between the rolling distance displayed on the roller and the travel distance of the taxi driving wheel; when the roller rotates, it is difficult to rotate an integer number of circles, and it is often necessary to manually use a belt to fine-tune the roller, which is prone to human errors, thereby improving the accuracy of calculating the driving wheel correction value.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The roller distance measuring device comprises:

[0008] A support frame, a roller assembly, a speed sensor and a measuring assembly; the roller assembly includes the first roller and the second roller, the first roller and the second roller are arranged on the support frame at an interval, the driving wheel of the vehicle to be inspected abuts against the circumferential surfaces of the first roller and the second roller, the first roller can be driven to rotate to drive the driving wheel to rotate, thereby driving the second roller to rotate, two driving wheels are provided, and the roller assembly is relatively provided with two groups; the speed sensor is provided on the first roller, for measuring the speed of the first roller; the measuring assembly is used to measure the number of rotations of the driving wheel.

[0009] As an optional technical solution of the roller distance measuring device, the roller distance measuring device also includes a driving member, which is arranged between the two first rollers and is used to drive the two first rollers to rotate, thereby driving the two driving wheels to rotate.

[0010] As an optional technical solution of the roller distance measuring device, the roller distance measuring device also includes a rotation limiting mechanism. Both ends of the two first rollers are provided with a rotating shaft. The rotation limiting mechanism is arranged on the support frame and is used to limit the rotation of the rotating shaft, thereby limiting the rotation of the first roller.

[0011] As an optional technical solution for the roller distance measuring device, the rotation limiting mechanism includes a hydraulic component and a clamping flap, and the clamping flap is provided in plurality. The hydraulic component can drive the clamping flap to move in a direction approaching or away from the rotating shaft to abut against or disengage from the rotating shaft to limit or not limit the rotation of the rotating shaft.

[0012] As an optional technical solution of the roller distance measuring device, the measuring component includes a rotation speed collector, which is detachably arranged on the driving wheel and is used to obtain the number of rotations of the driving wheel.

[0013] As an optional technical solution for the roller distance measuring device, the speed collector includes a micro gyroscope, which can detect the angular velocity of the driving wheel during rotation and obtain the angular change of the speed collector point during the rotation of the driving wheel.

[0014] As an optional technical solution of the roller distance measuring device, the rotation speed collector also includes an accelerometer, and the accelerometer can detect the linear acceleration of the driving wheel when it rotates.

[0015] As an optional technical solution of the roller distance measuring device, the speed collector also includes a wireless transceiver module, and the wireless transceiver module is communicatively connected with the micro gyroscope, the accelerometer and the speed sensor.

[0016] As an optional technical solution for the roller ranging device, the speed collector also includes a microprocessor and a power module. The microprocessor is used to process data from the micro gyroscope, the accelerometer, the wireless transceiver module and the speed sensor; the power module is used to provide electrical energy for the speed collector.

[0017] As an optional technical solution for the roller ranging device, the measuring component includes a laser positioning sensor and a reflective material plate, the reflective material plate is detachably arranged on the driving wheel, and the laser positioning sensor is arranged on the circumferential side of the driving wheel. The laser positioning sensor can emit laser and receive the laser reflected back by the reflective material plate to obtain the number of rotations of the driving wheel.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a roller distance measuring device, including a support frame, a roller assembly, a speed sensor and a measuring assembly; the roller assembly includes a first roller and a second roller, the first roller and the second roller are arranged on the support frame at intervals, the driving wheel of the vehicle to be inspected abuts against the circumferential surfaces of the first roller and the second roller, the first roller can be driven to rotate to drive the driving wheel to rotate, thereby driving the second roller to rotate, two driving wheels are provided, and two groups of roller assemblies are relatively provided; the speed sensor is provided on the first roller, and is used to measure the speed of the first roller; the measuring assembly is used to measure the number of rotations of the driving wheel. By measuring the number of rotations of the driving wheel alone to calculate the rotation distance of the first roller, the deviation between the rotation distance of the first roller and the actual driving distance of the taxi driving wheel due to the slipping of the driving wheel is avoided; the manual adjustment of the number of rotations of the first roller is avoided, and the accuracy of calculating the correction value of the driving wheel is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure diagram of the roller distance measuring device provided by the embodiment of the utility model is Figure 1 ;

[0021] Figure 2 The structure diagram of the roller distance measuring device provided by the embodiment of the utility model is Figure 2 ;

[0022] Figure 3 It is a schematic diagram of a speed collector of a roller distance measuring device provided in an embodiment of the utility model;

[0023] Figure 4 It is a step diagram of a tire correction value detection method provided by an embodiment of the utility model;

[0024] Figure 5 It is a step diagram of the trip error detection method provided by an embodiment of the utility model.

[0025] In the figure:

[0026] 100. Driving wheel;

[0027] 10. Support frame;

[0028] 20. roller assembly; 21. first roller; 211. rotating shaft; 22. second roller;

[0029] 30. Speed ​​sensor;

[0030] 40. Speed ​​collector; 41. Micro gyroscope; 42. Accelerometer; 43. Wireless transceiver module; 44. Microprocessor; 45. Power module;

[0031] 50. driving member; 51. connecting shaft;

[0032] 60. Limited transfer institutions;

[0033] 70. Bearings;

[0034] 80. Coupling. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] Since there is a difference between using a roller to detect and actually driving on the ground, it is necessary to calculate the tire correction value of the driving wheel based on the linear relationship between the driving wheel driving on the ground and on the roller distance measuring device. In the prior art, the driving wheel is placed on a roller, and the roller is controlled to rotate an integer number of circles (to facilitate calculation of the rolling distance). The rolling distance of the roller is the driving distance of the driving wheel on the roller distance measuring device.

[0040] However, in the actual process of detecting the tire correction value, the driving wheels of some taxis have a relatively large degree of tire tread wear due to long-term driving. When the driving wheels are rotated by the roller, the driving wheels will slip on the roller, resulting in a deviation between the rolling distance of the roller and the driving distance of the taxi driving wheels. In addition, since it is difficult for the roller to maintain an integer number of rotations when rotating, it is often necessary to manually use a belt to fine-tune the roller, which is prone to human errors and affects the accuracy of calculating the driving wheel correction value.

[0041] In order to solve the above problems, this embodiment provides a roller distance measuring device. Figure 1 and Figure 2 , including a support frame 10, a roller assembly 20, a speed sensor 30 and a measuring assembly. The roller assembly 20 includes a first roller 21 and a second roller 22. The first roller 21 and the second roller 22 are arranged on the support frame 10 at intervals. The driving wheel 100 of the vehicle to be inspected abuts against the circumferential surfaces of the first roller 21 and the second roller 22. The first roller 21 can be driven to rotate to drive the driving wheel 100 to rotate, thereby driving the second roller 22 to rotate. There are two driving wheels 100, and the roller assembly 20 is relatively arranged with two groups; the speed sensor 30 is arranged on the first roller 21, and is used to measure the speed of the first roller 21; the measuring assembly is used to measure the number of rotations of the driving wheel. By measuring the number of rotations of the driving wheel 100 alone to calculate the rotation distance of the first roller 21, it is avoided that the rotation distance of the first roller 21 and the actual driving distance of the taxi driving wheel 100 due to the slip of the driving wheel 100 are deviated; it is avoided to manually adjust the number of rotations of the first roller 21, and the accuracy of calculating the correction value of the driving wheel 100 is improved.

[0042] Specifically, the rolling distance of the first roller 21 can be calculated according to the rotation speed of the first roller 21, the rotation time and the radius of the first roller 21. Preferably, the circumference of the first roller 21 is set to 1000 mm±0.02% mm.

[0043] Furthermore, the roller distance measuring device further includes a driving member 50, which is disposed between the two first rollers 21 and is used to drive the two first rollers 21 to rotate, thereby driving the two driving wheels 100 to rotate. In this embodiment, the driving member 50 is configured as a servo motor. In other embodiments, the driving member 50 can be configured as other types of motors, which will not be described in detail herein.

[0044] Furthermore, the roller distance measuring device also includes a rotation limiting mechanism 60, and a rotating shaft 211 is provided at both ends of the two first rollers 21. The rotation limiting mechanism 60 is provided on the support frame 10, and is used to limit the rotation of the rotating shaft 211, thereby limiting the rotation of the first roller 21. Specifically, the rotating shafts 211 at both ends of the two first rollers 21 are rotatably provided on the support frame 10 through bearings 70, and the rotation limiting mechanism 60 is provided between the bearings 70 at one end of the two first rollers 21 that are close to each other and the servo motor. In this embodiment, the rotation limiting mechanism 60 includes a hydraulic component and a clamping petal, and a plurality of clamping petals are provided. The hydraulic component can drive the clamping petal to move in a direction close to or away from the rotating shaft 211, so as to abut or disengage from the abutment with the rotating shaft 211, so as to limit or not limit the rotation of the rotating shaft 211.

[0045] Furthermore, connecting shafts 51 are provided at both ends of the driving member 50 , and the connecting shaft 51 is coaxially connected to the rotating shaft 211 through a coupling 80 .

[0046] Further, the measuring assembly includes a speed collector 40, which is detachably mounted on the driving wheel 100 to obtain the number of rotations of the driving wheel 100. Specifically, the speed collector 40 is placed in a box body, and the box body is detachably connected to the driving wheel 100. Preferably, the box body is detachably mounted on the hub of the driving wheel 100.

[0047] Further, see Figure 3 The speed collector 40 includes a micro gyroscope 41, which can detect the angular velocity of the driving wheel 100 during rotation, and can obtain the angle change of the point position of the speed collector 40 during the rotation of the driving wheel 100. The speed collector 40 also includes an accelerometer 42, which can detect the linear acceleration of the driving wheel 100 during rotation. The micro gyroscope 41 and the accelerometer 42 work together to accurately sense and measure the motion posture, position, speed and other information of the driving wheel 100 during rotation, and then measure and control the number of rotations of the driving wheel 100 based on the comprehensive processing of this information.

[0048] Furthermore, the speed collector 40 also includes a wireless transceiver module 43, which is connected to the micro gyroscope 41, the accelerometer 42 and the speed sensor 30. That is, the wireless transceiver module 43 can receive data signals from the micro gyroscope 41, the accelerometer 42 and the speed sensor 30 and drive or limit the operation of the driving member 50. The speed collector 40 also includes a microprocessor 44 and a power module 45. The microprocessor 44 is used to process the data of the micro gyroscope 41, the accelerometer 42, the wireless transceiver module 43 and the speed sensor 30; the power module 45 is used to provide power to the speed collector 40.

[0049] The measuring component includes a laser positioning sensor and a reflective material plate. The reflective material plate is detachably arranged on the driving wheel 100. The laser positioning sensor is arranged on the peripheral side of the driving wheel 100. The laser positioning sensor can emit laser and receive laser reflected back by the reflective material plate to obtain the number of rotations of the driving wheel 100.

[0050] Specifically, the reflective material plate can be pasted on the hub of the driving wheel 100, the laser positioning sensor is arranged on the peripheral side of the driving wheel 100 and can emit laser to illuminate the first roller 21, which is the first positioning point. When the driving wheel rotates a specified number of times, that is, after reflecting the laser back to the laser positioning sensor a certain number of times, the driving wheel stops rotating. At this time, the luminescent material plate and the laser positioning sensor are opposite to each other, and the laser positioning sensor emits laser to illuminate the first roller 21, which is the second positioning point. The distance between the first positioning point and the second positioning point is measured, and the rolling distance of the driving wheel 100 can be obtained by calculating the rolling distance of the first roller 21 and adding the distance between the first positioning point and the second positioning point.

[0051] This embodiment provides a tire correction value detection method, which is applied to the above-mentioned roller distance measuring device, referring to Figure 4 , including the following steps:

[0052] S10, driving the vehicle to be inspected at a slow speed to make the two driving wheels 100 of the vehicle to be inspected rotate a first integer number of circles;

[0053] S11, measuring the travel distances of the two driving wheels 100 respectively to obtain a first travel distance B1 and a second travel distance B2;

[0054] S12, driving the vehicle to be inspected onto the roller distance measuring device, so that both driving wheels 100 are in contact with the first roller 21 and the second roller 22;

[0055] S13, driving the first roller 21 to rotate, so as to drive the driving wheel 100 to rotate, and when the driving wheel 100 rotates a first integer number of circles, controlling the driving wheel 100 and the first roller 21 to stop rotating;

[0056] S14, using the rotation speed of the first roller 21 to respectively calculate the rolling distances of the two first rollers 21, to obtain a first rolling distance A1 and a second rolling distance A2;

[0057] S15 . Calculate the correction value C of the driving wheel 100 using the tire correction value calculation formula.

[0058] By controlling the number of rotations of the driving wheel 100 to calculate the rotation distance of the first roller 21, the deviation between the rotation distance of the first roller 21 and the driving distance of the taxi driving wheel 100 due to slipping of the driving wheel 100 can be avoided; manual adjustment of the number of rotations of the first roller 21 can be avoided, thereby improving the accuracy of calculating the correction value of the driving wheel 100.

[0059] Specifically, the first integer number of revolutions is preferably five revolutions, so as to avoid inaccurate detection results due to too few rotations, and also to avoid the impact of too many rotations on detection efficiency.

[0060] Furthermore, the tire correction value calculation formula is:

[0061] C = (A / B-1) × 100%;

[0062] A=(A1+A2) / 2;

[0063] B = (B1 + B2) / 2;

[0064] The units of A and B are both m.

[0065] In practical applications, the arithmetic mean of the tire correction values ​​of all measured vehicles of a certain model is taken as the tire correction value of that model.

[0066] As taxis travel for a long time, the tread of the tires will wear out, causing the tires to slip or spin during driving, resulting in the tire's actual rolling distance not matching the driving distance displayed on the vehicle's networked taximeter, causing meter errors. This embodiment also provides a meter error detection method, which uses the tire correction value detection method, see Figure 5 , including the following steps:

[0067] S20, calculating the correction value C of the driving wheel 100 of the vehicle to be inspected;

[0068] S21, driving the vehicle to be inspected onto the roller distance measuring device, so that the two driving wheels 100 are respectively in contact with the first roller 21 and the second roller 22;

[0069] S22, driving the first roller 21 to rotate, so as to drive the driving wheel 100 to rotate;

[0070] S23. Observe the mileage value J on the network-connected taximeter of the vehicle to be inspected. d , when the meter value Jd When the verification value is reached, the first roller 21 is controlled to stop rotating and the meter indication distance D on the networked meter of the vehicle to be inspected is obtained;

[0071] S24. Use the trip error calculation formula to calculate the trip error D of the calibration value. w .

[0072] Furthermore, the calculation formula of the trip meter error is:

[0073] D w ={[D×(1+C)-J d ] / J d}×100%;

[0074] Among them, the meter value J d The unit of the distance D indicated on the meter is m.

[0075] Furthermore, multiple verification values ​​can be selected to improve the accuracy of detecting the mileage error. Preferably, the verification value includes 0, that is, the detection starting value.

[0076] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A roller distance measuring device, characterized in that: include: Support frame (10); A roller assembly (20), the roller assembly (20) comprising a first roller (21) and a second roller (22), the first roller (21) and the second roller (22) being arranged on the support frame (10) at an interval, the driving wheel (100) of the vehicle to be inspected being able to abut against the circumferential surfaces of both the first roller (21) and the second roller (22), the first roller (21) being able to be driven to rotate, so as to drive the driving wheel (100) to rotate, thereby driving the second roller (22) to rotate, the driving wheel (100) being provided with two, and the roller assembly (20) being provided with two groups relatively; a rotation speed sensor (30), the rotation speed sensor (30) being arranged on the first roller (21) and being used to measure the rotation speed of the first roller (21); A measuring component is used to measure the number of rotations of the driving wheel (100).

2. The roller distance measuring device according to claim 1, characterized in that: The roller distance measuring device further comprises a driving member (50), wherein the driving member (50) is arranged between the two first rollers (21) and is used to drive the two first rollers (21) to rotate, thereby driving the two driving wheels (100) to rotate.

3. The roller distance measuring device according to claim 1, characterized in that: The roller distance measuring device further comprises a rotation limiting mechanism (60), both ends of the two first rollers (21) are provided with a rotation shaft (211), and the rotation limiting mechanism (60) is arranged on the support frame (10) and is used to limit the rotation of the rotation shaft (211), thereby limiting the rotation of the first roller (21).

4. The roller distance measuring device according to claim 3, characterized in that: The rotation limiting mechanism (60) comprises a hydraulic component and a clamping flap, wherein a plurality of the clamping flaps are provided. The hydraulic component can drive the clamping flaps to move in a direction approaching or away from the rotating shaft (211) so as to abut against or disengage from the rotating shaft (211) so as to limit or not limit the rotation of the rotating shaft (211).

5. The roller distance measuring device according to claim 1, characterized in that: The measuring component comprises a rotation speed collector (40), which is detachably arranged on the driving wheel (100) and is used to obtain the number of rotations of the driving wheel (100).

6. The roller distance measuring device according to claim 5, characterized in that: The rotation speed collector (40) comprises a micro gyroscope (41), and the micro gyroscope (41) is capable of detecting the angular velocity of the driving wheel (100) during rotation, and is capable of obtaining the angular change of the position of the rotation speed collector (40) during the rotation of the driving wheel (100).

7. The roller distance measuring device according to claim 6, characterized in that: The rotation speed collector (40) further comprises an accelerometer (42), and the accelerometer (42) can detect the linear acceleration of the driving wheel (100) when it rotates.

8. The roller distance measuring device according to claim 7, characterized in that: The rotation speed collector (40) further comprises a wireless transceiver module (43), wherein the wireless transceiver module (43) is communicatively connected with the micro gyroscope (41), the accelerometer (42) and the rotation speed sensor (30).

9. The roller distance measuring device according to claim 8, characterized in that: The speed collector (40) further comprises a microprocessor (44) and a power module (45); the microprocessor (44) is used to process data from the micro gyroscope (41), the accelerometer (42), the wireless transceiver module (43) and the speed sensor (30); and the power module (45) is used to provide electrical energy to the speed collector (40).

10. The roller distance measuring device according to claim 1, characterized in that: The measuring component comprises a laser positioning sensor and a reflective material plate, wherein the reflective material plate is detachably arranged on the driving wheel (100), and the laser positioning sensor is arranged on the peripheral side of the driving wheel (100). The laser positioning sensor can emit laser light and receive the laser light reflected back by the reflective material plate to obtain the number of rotations of the driving wheel (100).

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