CN112880573B - Thickness online measuring device and method for high-speed rail brake pad production line - Google Patents
Thickness online measuring device and method for high-speed rail brake pad production line Download PDFInfo
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- CN112880573B CN112880573B CN202110005183.6A CN202110005183A CN112880573B CN 112880573 B CN112880573 B CN 112880573B CN 202110005183 A CN202110005183 A CN 202110005183A CN 112880573 B CN112880573 B CN 112880573B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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Abstract
The invention relates to a thickness online measuring device and method for a high-speed rail brake pad production line. The device comprises a detection platform, a conveying belt, a laser sensor and a processor. Firstly, moving a conveying belt to a calibration position, starting a laser sensor to measure the distance between a detection platform and the conveying belt and calibrating data of a gap between the detection platform and the conveying belt to obtain a calibration result; then placing a high-speed rail brake pad to be detected on the detection platform, moving the conveyer belt to a calibration position, and measuring the height of the high-speed rail brake pad relative to the plane of the detection platform and the plane of the conveyer belt; and finally, compensating the calibration result in the step S1 with the measurement result in the step S2 to obtain the thickness data of the high-speed rail brake pad. The method is simple and easy to realize on a production line, can conveniently and accurately detect the complete thickness of the high-speed rail brake pad, and avoids the influence of the gap between the detection platform and the conveying belt on the result.
Description
Technical Field
The invention relates to the technical field of thickness measurement, in particular to a device and a method for measuring the thickness of a high-speed rail brake pad production line on line.
Background
For the thickness detection of the high-speed rail brake pad, the conventional detection mode is mainly that the vernier caliper is used for manually measuring several points of the brake pad, the mode is manual measurement, only three or four points on the surface of the brake pad can be measured, the measurement error is large, the measurement efficiency is low, and the accurate measurement of all the brake pads is difficult to ensure.
Because the detection method has larger influence of human factors, an effective detection means and method are urgently needed, the existing detection process is improved, and the production efficiency and the product quality management and control are improved.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the invention provides an online thickness measuring device for a high-speed rail brake pad production line, which comprises a detection platform, a conveying belt, a laser sensor and a processor. The thickness value of the high-speed rail brake pad can be accurately measured on line.
The second aspect of the embodiment of the invention provides an online thickness measuring method for a high-speed rail brake pad production line, which can accurately, conveniently and online measure the thickness value of a high-speed rail brake pad.
(2) Technical scheme
The embodiment of the invention provides an online thickness measuring device for a high-speed rail brake pad production line, which comprises a detection platform, a conveying belt, a laser sensor and a processor, wherein the detection platform is arranged on two sides of the conveying belt in the conveying direction, the plane where the detection platform is arranged is parallel to the plane where the conveying belt is arranged, and the distance between the plane where the conveying belt is arranged and the plane where the detection platform is arranged is adjustable; the laser sensor is arranged above the conveying belt and used for detecting the distance between the high-speed rail brake pad and the surface of the detection platform and/or the surface of the conveying belt, the laser sensor is connected with the processor, and the processor is used for processing detection data of the laser sensor.
Further, the detection platform is horizontally arranged.
Further, the distance between the detection platforms on the two sides of the conveying belt is smaller than the width of the high-speed rail brake block.
Further, the laser sensor is a line sensor.
The second aspect of the embodiment of the present invention provides an online thickness measuring method for a high-speed rail brake pad production line, which is applied to an online thickness measuring device for a high-speed rail brake pad production line shown in the first aspect of the embodiment of the present invention, and includes:
s1: moving the conveying belt to a calibration position, starting a laser sensor to measure the distance between the detection platform and the conveying belt and calibrating data of a gap between the detection platform and the conveying belt to obtain a calibration result;
s2: placing a high-speed rail brake pad to be detected on a detection platform, moving a conveyer belt to a calibration position, and measuring the height of the high-speed rail brake pad relative to the plane of the detection platform and the plane of the conveyer belt;
s3: and (5) compensating the calibration result of the step (S1) with the measurement result of the step (S2) to obtain the thickness data of the high-speed rail brake pad.
Further, the calibration position is a position where the plane where the conveying belt is located below the plane where the calibration detection platform is located.
Further, the thickness online measurement method further comprises the following steps:
s4: the conveyer belt rises upwards and lifts the high-speed railway brake block and carries, and the treater drives sorter according to the thickness data drive high-speed railway brake block and carries out the classification to the high-speed railway brake block.
Further, step S1 specifically includes:
the laser sensor measures and obtains data of the distance between the detection platform and the conveying belt;
traversing the data to find the data of the gap between the detection platform and the conveying belt, replacing the data of the gap between the detection platform and the conveying belt, and replacing the data of the gap between the detection platform and the conveying belt with the height data between the detection platform and the conveying belt;
and storing the data of the distance between the replaced detection platform and the conveying belt.
Further, step S2 and step S3 are specifically:
measuring the height between the brake pad of the high-speed rail and the plane where the detection platform is located and the plane where the conveying belt is located by using a laser sensor, and judging whether the measured data is greater than a calibration result plus a set height threshold value;
if the measured data is larger than the calibration result plus the set height threshold value, the data is considered as the surface of the high-speed rail brake pad, and then the surface data of all the high-speed rail brake pads are obtained through traversal one by one;
and calculating the average thickness of the high-speed rail brake pad.
Further, the height threshold value is half of the minimum thickness of the high-speed rail brake pad.
(3) Advantageous effects
The method comprises the steps of firstly identifying the heights of a detection platform and a conveying belt at a calibration position, identifying a gap between the detection platform and the conveying belt, calibrating height data of the gap, and obtaining a calibration result by combining the heights of the detection platform and the conveying belt at the calibration position; and then, the high-speed rail brake block is placed on the detection platform, the height of the high-speed rail brake block relative to the detection platform 1, the conveyer belt and the gap between the detection platform and the conveyer belt is identified and detected, and the height and the calibration result are compensated to obtain the complete thickness of the high-speed rail brake block.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an online measurement device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an online measurement device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an online measurement device according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of the height of the inspection platform, the conveyor belt, and the gap between the inspection platform and the conveyor belt as identified by the laser sensor according to one embodiment of the present invention.
Fig. 5 is a diagram illustrating the slot data after being replaced according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a single line measured by a laser sensor according to an embodiment of the present invention.
In the figure: the device comprises a detection platform 1, a conveying belt 2, a laser sensor 3 and a processor 4.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
The present application will be described in detail with reference to the accompanying examples and figures 1-6.
The thickness online measuring device for the high-speed rail brake block production line comprises a detection platform 1, a conveying belt 2, a laser sensor 3 and a processor 4, wherein the detection platform 1 is arranged on two sides of the conveying direction of the conveying belt 2, the plane where the detection platform 1 is arranged is parallel to the plane where the conveying belt 2 is arranged, and the distance between the plane where the conveying belt 2 is arranged and the plane where the detection platform 1 is arranged is adjustable; laser sensor 3 sets up in the top of conveyer belt 2 for detect the relative testing platform of high-speed railway brake block 1 surface and/or the distance on conveyer belt 2 surface, laser sensor 3 is connected with treater 4, and treater 4 is used for handling laser sensor 3's detection data.
Referring to fig. 1 to fig. 3, for convenience of description, the plane on which the conveyor belt 2 is located in the embodiment of the present invention is disposed horizontally, but the conveyor belt 2 in the embodiment of the present invention may also be disposed obliquely. According to the thickness online measuring device of the high-speed rail brake pad production line in the first aspect of the embodiment of the invention, in practical use, the plane of the conveyor belt 2 can move relative to the plane of the detection platform 1, that is, the plane of the conveyor belt 2 can move above or below the plane of the detection platform 1. As shown in fig. 2, when the plane of the conveyor belt 2 moves above the plane of the detection platform 1, the brake pads of the high-speed rail are conveyed by the conveyor belt 2; as shown in the attached figure 3, when the plane of the conveying belt 2 moves to the position below the plane of the detection platform 1, the brake pads of the high-speed rail are lapped on the detection platform 1 at two sides, are static and do not move, the thickness of the brake pads can be measured by the laser sensor 3, and the measurement result is obtained after the measurement result is processed by the processor 4.
In the embodiment of the invention, the conveying belt 2 can be arranged on a production line of the high-speed rail brake pad, therefore, the detection platforms 1 are arranged on two sides of the conveying belt 2, the distance between the upper end surface of the high-speed rail brake pad and the detection platform 1 and the conveying belt 2 is measured by the laser sensor 3, the thickness of the high-speed rail brake pad can be easily calculated by the processor 4, and the thickness of the high-speed rail brake pad which is easily calculated by the processor 4 is conveyed to a corresponding position by the conveying belt 2, or the thickness of the high-speed rail brake pad is processed by a corresponding processing mechanism, for example, the thickness is classified and the like.
In conclusion, the thickness online measuring device disclosed by the invention can be arranged on a production line of a high-speed rail brake pad, so that the purpose of online detection is realized; the high-speed rail brake block is conveyed to the area of the detection platform 1 by the conveying belt 2 on the production line, the high-speed rail brake block is placed on the detection platform 1 by utilizing the lifting of the conveying belt 2, the measurement of the thickness of the high-speed rail brake block is completed by the laser sensor 3, the data processing is completed by the processor 4, and the result is output. The embodiment of the invention has a simple structure, can be used in combination with a production line of the high-speed rail brake pad, calculates the thickness of the high-speed rail brake pad on line in the production process, and is convenient for classification, processing and the like of the subsequent process of the production line according to the thickness of the high-speed rail brake pad.
As described above, in the thickness on-line measuring device for a high-speed rail brake pad production line according to the first aspect of the embodiment of the present invention, the detection platform 1 may be horizontally disposed. Referring to the attached drawings 1-3, when the detection platform 1 is horizontally arranged, the conveyor belt 2 is also horizontally arranged, so that the brake pad of the high-speed rail is more stable under the conveying of the conveyor belt 2, the brake pad of the high-speed rail is more stably placed on the detection platform 1, and meanwhile, when the laser sensor 3 vertically detects the brake pad of the high-speed rail, the output is the thickness of the brake pad. Of course, the detection platform 1 may also be disposed obliquely, for example, the inclination angle is 5 ° or 10 °, and the inclination angle of the detection platform 1 may meet the requirement when the high-speed rail brake pad slides down from the detection platform 1 and/or the conveyor belt 2 without being affected.
Specifically, in the thickness online measuring device of the first aspect of the embodiment of the invention, the distance between the detection platforms 1 on both sides of the conveyor belt 2 is smaller than the width of the high-speed rail brake pad. Referring to fig. 2 and 3, when the conveyor belt 2 moves downward, the brake pad of the high-speed rail is lapped on the detection platform 1 and stands still, the distance between the upper end surface of the brake pad of the high-speed rail and the surface of the detection platform 1 and the surface of the conveyor belt 2 is detected by the laser sensor 3, and the obtained data is processed by the processor 4 and then output.
Specifically, in yet another online thickness measuring device for a high-speed rail brake pad production line according to the first aspect of the embodiment of the present invention, the laser sensor 3 may be a line sensor. As shown in fig. 1 and 3, when the laser sensor 3 is a line sensor and needs to collect data, it can move along the conveying direction of the conveyor belt 2 to completely collect data. Meanwhile, the line sensor has the advantages of high measurement sensitivity, high precision and the like, and the accuracy of measurement can be effectively improved.
In the embodiment of the present invention, when it is needed to be described, in order to ensure that the plane where the conveyor belt 2 is located can easily realize the relative movement with the plane where the detection platform 1 is located, a gap inevitably exists between the conveyor belt 2 and the detection platforms 1 on both sides, and due to the existence of the gap, when the laser sensor 3 detects the thickness of the high-speed rail brake pad, the thickness of the upper surface of the high-speed rail brake pad at the lower end of the gap part cannot be accurately measured, that is, the existence of the gap makes no reference object exist at the upper surface of the high-speed rail brake pad at the lower end of the gap part, so that the problem of inaccurate measurement of the high-speed rail brake pad at the gap part exists.
In view of this, the second aspect of the embodiment of the present invention provides an online thickness measuring method on a high-speed rail brake pad production line.
According to a second aspect of the embodiment of the invention, the online thickness measuring method for the brake pad production line of the high-speed rail is applied to the online thickness measuring device for the brake pad production line of the high-speed rail, wherein the online thickness measuring method comprises the following steps:
s1: moving the conveying belt to a calibration position, starting a laser sensor to measure the distance between the detection platform and the conveying belt and calibrating data of a gap between the detection platform and the conveying belt to obtain a calibration result;
s2: placing a high-speed rail brake pad to be detected on a detection platform, moving a conveyer belt to a calibration position, and measuring the height of the high-speed rail brake pad relative to the plane of the detection platform and the plane of the conveyer belt;
s3: and (5) compensating the calibration result of the step (S1) with the measurement result of the step (S2) to obtain the thickness data of the high-speed rail brake pad.
In the thickness online measurement method according to the second aspect of the embodiment of the present invention, first, the conveyor belt 2 is moved to the calibration position, the laser sensor 3 is started to measure the distance between the detection platform 1 and the conveyor belt 2 and calibrate the data of the gap between the detection platform 1 and the conveyor belt 2, so as to obtain the calibration result. Therefore, on one hand, the height data of the end face of the detection platform 1 and the end face of the conveying belt can be measured, and the gap between the detection platform 1 and the conveying belt 2 can be detected; on the other hand, the data of the identified gap can be calibrated, for example, the data of the gap can be replaced by the data which is flush with the conveying belt 2, so that when the thickness of the high-speed rail brake block is measured, for the thickness data of the part of the high-speed rail brake block, only the height data of the upper end surface of the high-speed rail brake block needs to be measured, the position of the gap needs to be identified, and the height of the upper end surface of the high-speed rail brake block is subtracted from the calibrated result.
Then, in the embodiment of the invention, the high-speed rail brake pad to be detected is placed on the detection platform 1, the conveyer belt 2 is moved to the calibration position, and the height of the high-speed rail brake pad relative to the plane of the detection platform and the height of the conveyer belt is measured. Moving the conveyor belt 2 to the calibration position ensures that the height position of the laser sensor 3 during measurement is consistent with the height position during calibration, thereby unifying the measurement reference.
And finally, compensating the calibration result of the step S1 with the measurement result of the step S2 to obtain the thickness data of the high-speed rail brake pad.
In the embodiment of the invention, in order to accurately measure the thickness data of the brake pad of the high-speed rail, firstly, the conveyer belt 2 is moved to a calibration position, and the height data of the surfaces of the detection platform 1 and the conveyer belt 2 are measured by using the laser sensor 3; then the high-speed rail brake block is moved to the detection platform 1, the conveyer belt 2 is moved to a calibration position, the height of the high-speed rail brake block measured relative to the detection platform 1 and the conveyer belt 2 is height data of the part of the high-speed rail brake block projected on the detection platform 1 and the conveyer belt 2, and the height data of the surface of the detection platform 1 and the conveyer belt 2 is subtracted from the height data to obtain thickness data of the part of the high-speed rail brake block projected on the detection platform 1 and the conveyer belt 2.
Meanwhile, the gap between the detection platform 1 and the conveying belt 2 is detected. In the embodiment of the invention, firstly, the conveyer belt 2 is moved to a calibration position, the laser sensor 3 is used for measuring the height data of the surfaces of the detection platform 1 and the conveyer belt 2, and simultaneously the gap position between the detection platform 1 and the conveyer belt 2 can be identified, as shown in figure 4, after the gap position is identified, the known height data result can be used for replacement, for example, the data of the gap can be replaced by the data flush with the conveyer belt 2, as shown in figure 5; then the high-speed rail brake pad is moved to the detection platform 1, the conveyer belt 2 is moved to a calibration position, so that the height data of the high-speed rail brake pad projected at the gap can be measured through the laser sensor 3, the thickness value of the high-speed rail brake pad at the gap can be obtained by subtracting the calibration result from the height data of the high-speed rail brake pad projected at the gap, and therefore the complete thickness data of the high-speed rail brake pad can be obtained by combining the thickness data of the part of the high-speed rail brake pad projected on the detection platform 1 and the conveyer belt 2.
In summary, in the embodiment of the present invention, first, the reference height data of the surfaces of the detection platform 1 and the conveyor belt 2 are measured, the gap position of the detection platform 1 and the conveyor belt 2 is determined, and the height data of the gap position between the detection platform 1 and the conveyor belt 2 is replaced to obtain the height reference value of the gap; then, the high-speed rail brake pad is placed on the detection platform 1, the height data of the upper surface of the high-speed rail brake pad relative to the upper surfaces of the detection platform 1 and the conveyor belt 2 are measured, and the thickness data of the high-speed rail brake pad projected on the positions of the detection platform 1 and the conveyor belt 2 can be obtained by subtracting the reference height data of the surfaces of the detection platform 1 and the conveyor belt 2 from the height data of the upper surface of the high-speed rail brake pad relative to the upper surfaces of the detection platform 1 and the conveyor belt 2; for the thickness data of the gap position, the height value of the projection of the upper surface of the high-speed rail brake pad on the detection platform 1 at the gap position can be easily identified under the measurement of the laser sensor 3, and the thickness value of the projection of the high-speed rail brake pad at the gap position can be obtained by subtracting the height reference value of the gap position from the height value, so that the thickness structure of the whole high-speed rail brake pad can be obtained.
The embodiment of the invention can completely, accurately and online measure the thickness data of the high-speed rail brake pad, and solves the problem that the thickness data of the high-speed rail brake pad can not be completely measured due to the gap between the detection platform 1 and the conveyer belt 2 in the prior art.
Further, in the method for measuring thickness on line according to the second aspect of the embodiment of the present invention, the calibration position may be a position where the plane of the conveyor belt is located below the plane of the calibration and detection platform. Referring to the attached drawings 1-3, only when the conveyer belt 2 is positioned below the detection platform 1, the high-speed rail brake pad can be lapped on the detection platform 1, so that the height of the upper end surface of the high-speed rail brake pad can be measured; and the calibration position is set to be the position below the plane of the conveying belt 2, which is located on the detection platform 1, so that the height of the high-speed rail brake pad at the lap joint position can be measured, and the height is removed when the thickness of the high-speed rail brake pad is finally calculated, so that the thickness of the high-speed rail brake pad can be accurately measured.
Further, in the thickness online measurement method according to the second aspect of the embodiment of the present invention, the thickness online measurement method may further include: s4: the conveyer belt rises upwards and lifts the high-speed railway brake block and carries, and the treater drives sorter according to the thickness data drive high-speed railway brake block and carries out the classification to the high-speed railway brake block. In the embodiment of the invention, the thickness of the high-speed rail brake pad can be accurately measured through the steps S1 to S3, so that after the step S3, the high-speed rail brake pad is lifted up and lifted up by the conveyer belt 2 in the step S4 for conveying, and the processor 4 can drive the sorting device to sort the high-speed rail brake pad according to the thickness data of the high-speed rail brake pad. Therefore, the purpose of classifying according to the thickness of the high-speed rail brake pad can be achieved, and the method is suitable for operation of a production line. If the thickness of the high-speed rail brake pad does not meet the requirement, the sorting device can remove the brake pad out of the conveying belt 2; if the thickness of the high-speed rail brake pad can be determined, the high-speed rail brake pad can be classified into different material receiving devices by the classifying device. Of course, in the embodiment of the present invention, the sorting device may be a robot, and the specific structure thereof may be determined according to the needs.
Further, in the thickness online measurement method according to the second aspect of the embodiment of the present invention, step S1 specifically includes:
the laser sensor measures and obtains data of the distance between the detection platform and the conveying belt;
traversing the data to find the data of the gap between the detection platform and the conveying belt, replacing the data of the gap between the detection platform and the conveying belt, and replacing the data of the gap between the detection platform and the conveying belt with the height data between the detection platform and the conveying belt;
and storing the data of the distance between the replaced detection platform and the conveying belt.
In the embodiment of the invention, firstly, step S1 measures data of the distance between the detection platform 1 and the conveyor belt 2 by using the laser sensor 3; then traversing the data to find the data of the gap between the detection platform 1 and the conveyer belt 2, replacing the data of the gap between the detection platform 1 and the conveyer belt 2, and replacing the data of the gap between the detection platform 1 and the conveyer belt 2 with the height data between the detection platform 1 and the conveyer belt 2; this is because the gap depth between the detecting platform 1 and the conveyor belt 2 is high, and as shown in fig. 4, if the gap is not identified, when the thickness of the high-speed rail brake pad is measured, the height reference object of the high-speed rail brake pad in the gap area cannot be accurately found. Therefore, in the step S1 of the embodiment of the present invention, the data of the distance between the detection platform 1 and the conveyor belt 2 is obtained by measuring with the laser sensor 3, and the data of the gap between the detection platform 1 and the conveyor belt 2 is found by traversing the data, and then the data of the gap between the detection platform 1 and the conveyor belt 2 is replaced, so that the gap area can be identified and the data can be calibrated, which is convenient for the subsequent thickness measurement of the high-speed rail brake pad, and an accurate height reference object is provided, so as to accurately identify the thickness of the high-speed rail brake pad at the gap.
Further, the following describes how to identify the gap and calibrate the gap data in a specific embodiment:
first, laser beam is transmittedThe sensor 3 measures the height distance between the testing platform 1 and the conveyor belt 2, at this time, the conveyor belt 2 is in the calibration position, the data of the height distance between the testing platform 1 and the conveyor belt 2 can be assumed to be composed of 300 lines of data, each line of data can be assumed to be composed of 640 points of data, and therefore D can be used 0 The matrix of (2) represents the raw data of the whole detection platform, and the value of each element in the matrix is the actual distance from the laser sensor 3 to the detection platform 1 and the conveyor belt 2.
Example (c):
matrix D 0 The number of rows =640 and the number of columns =300, each row represents one line of data of the laser sensor 3, and the 640 rows represent 640 lines of data measured by the laser sensor 3 in a scan, and each line has 300 dots.
Since the middle of the testing platform 1 has a gap for lifting the conveyer belt 2, the data D is required to be processed 0 The position of the gap is found first, and the gap data is processed first.
Let us refer to the matrix D 0 The data of each line is analyzed by decomposing the data of each line, the data of one line is processed each time, the gap data characteristic is searched on the data of one line, and the waveform of each line of the scanning detection platform 1 of the laser sensor 3 is shown in fig. 4.
Analyzing the waveform data as shown in fig. 4, we can see that the gap data between the detection platform 1 and the conveyor belt 2 is significantly smaller than the data of other areas of the detection platform 1, and therefore, we need to set a one-dimensional empirical value array C = [ C ] 0 c 1 c 2 c 3 c 4 c 5 c 6 c 7 ]Wherein c is i = maxval (D) -10, assuming that data of each column is D i ＝[d i(0) …d i(640) ]Using our designed empirical array C at the original D i Sliding comparison from front to back, i.e. comparing C for the first time 0 To C 7 And d i(0) To d i(7) Next comparison C 0 To C 7 And d i(1) To d i(8) Can be regarded as C at D i Moved up and back by one element and then compared with D i The starting point and the end point of the gap data can be judged by the mode of sliding comparison of the empirical data set on the original data, and when the data are in sliding comparison, all the data in the first time C are larger than the corresponding D i Of (3), then C 0 The position of the corresponding original data is the starting point of the gap, the array C continues to slide backwards, and when the data in the first time C is not all larger than D i The end of the gap is considered to have been reached when the corresponding data is obtained, and the start and end positions of the groove are thus obtained.
I.e. when c first appears 0 ＞d im …c 7 ＞d i(m+7) When it is considered that the groove start point pos is reached s ＝m；
Continue sliding backward to judge when c appears 0 ＞d in …c 6 ＞d i(n+6) ，c 7 ＜d i(n+7) When the groove end point pos is considered to be reached e ＝n+7。
After calculating the starting point and the end point of the gap, we can perform replacement processing on the data of the gap, perform linear interpolation from the data of the point before the gap to the data of the point after the gap, and replace the data of the gap with the interpolated data, and the specific method can be as follows:
let the data of a point before the gap be d i Data of a point after the gap is d i+n And the number of the data in the gap is n, so that the replacement data of each point in the gap can be calculated as follows:
wherein:
using calculated data g i Replacing data d in the gap i We can get the data after the line gap data processing is completed, as shown in fig. 5.
Finally, the data of each line is processed in the same way to obtain a calibrated result D', and thus the calibration process of the gap data between the detection platform 1 and the conveyor belt 2 is completed.
In summary, in step S1 of the embodiment of the present invention, the laser sensor 3 is first used to identify the heights of the detection platform 1 and the conveyor belt 2 located at the calibration position, and then the gap between the detection platform 1 and the conveyor belt 2 is identified, and the data of the gap is calibrated and replaced, so that the height value of the high-speed rail brake pad projected at the gap can be accurately measured in the subsequent steps, and the accuracy of online thickness measurement of the high-speed rail brake pad can be effectively improved.
Further, in the thickness online measurement method according to the second aspect of the embodiment of the present invention, the step S2 and the step S3 may specifically be:
measuring the height between the plane of the high-speed rail brake pad and the plane of the detection platform and the plane of the conveyor belt by using a laser sensor, and judging whether the measured data is greater than a calibration result plus a set height threshold value;
if the measured data is larger than the calibration result plus the set height threshold value, the data is considered as the surface of the high-speed rail brake pad, and then the surface data of all the high-speed rail brake pads are obtained through traversal one by one;
and calculating the average thickness of the high-speed rail brake pad.
In the embodiment of the invention, the heights of the detection platform 1 and the conveyer belt 2 at the calibration position can be detected through the step S1, the gap position between the detection platform 1 and the conveyer belt 2 is identified, and the deeper data of the gap position is subjected to replacement calibration, so that a reference value is ensured to be available during the measurement of the upper end surface of the high-speed rail brake pad in the subsequent step, and the thickness value of the high-speed rail brake pad at the gap position can be accurately measured. After the step S1, in the step S2 and the step S3 of the embodiment of the invention, the laser sensor 3 is used for measuring the height between the high-speed rail brake pad and the plane where the detection platform 1 is located and the plane where the conveyer belt 2 is located, and whether the measured data is greater than the calibration result plus a set height threshold value is judged so as to judge and identify the high-speed rail brake pad; if the measured data is larger than the calibration result plus the set height threshold value, the data is regarded as the surface of the high-speed rail brake pad, and then the surface data of all the high-speed rail brake pads are obtained through traversal one by one; and finally, calculating the average thickness of the high-speed rail brake pad.
In the embodiment of the present invention, that is, after the height of the detection platform 1 and the conveyor belt 2 at the calibration position are detected and the data at the gap is identified and changed in step S1; and S2 and S3, the high-speed rail brake pad is placed on the detection platform 1, the laser sensor 3 is used for identifying the high-speed rail brake pad and detecting the distance between the high-speed rail brake pad and the detection platform 1, the height between the high-speed rail brake pad and the conveyor belt 2 and the height between the detection platform 1 and the conveyor belt 2, and the thickness of the high-speed rail brake pad is measured.
Step S1: measuring the height data of the detection platform 1, the conveyer belt 2 and the calibrated gap to obtain a complete calibration result; and S2 and S3, comparing the calibration result with a height threshold value to identify the high-speed rail brake pad, wherein the high-speed rail brake pad has a certain thickness, the height threshold value is added on the basis of the calibration result, for example, the height threshold value is 70% of the thickness of the high-speed rail brake pad, and if the height threshold value is exceeded, the high-speed rail brake pad is identified, so that the position of the high-speed rail brake pad can be completely identified, finally, the height of the high-speed rail brake pad is measured according to the identification result, and the calibration result is subtracted from the height, so that the complete thickness of the high-speed rail brake pad can be obtained.
The following describes how to identify the high-speed brake pad and determine the thickness of the high-speed brake pad based on step S1 by using a specific example.
In the actual production process, the data of a single line obtained by measuring by using the laser sensor 3 in step S2 is shown in fig. 6, and we need to determine which data are valid data of the surface of the brake pad of the high-speed rail. Firstly, invalid data of 0 is removed, a large amount of invalid data can be measured by the laser sensor 3 at the position of the edge of the high-speed rail brake pad, the invalid data needs to be removed firstly, and only the remaining valid data is analyzed.
Assuming that the measured actual data is a matrix R, the result of the calibration in the step S1 is a calibration result D', the height threshold h needs to be added to the corresponding calibration result, and the height threshold can be one half of the minimum height of the high-speed rail brake pad, that is, if R is judged to be ij ＞D′ ij +h
Then consider this R ij And (4) determining the surface of the high-speed rail brake pad, otherwise, determining the surface data of all the high-speed rail brake pads at one time according to the method.
Subsequently, all R are passed ij Calculating the average thickness of the high-speed rail brake pad, wherein the calculation formula is as follows:
therefore, the thickness of the high-speed rail brake pad is obtained.
In summary, in the embodiment of the present invention, firstly, the heights of the detection platform 1 and the conveyor belt 2 at the calibration position are identified, a gap between the detection platform 1 and the conveyor belt 2 is identified, the height data of the gap is calibrated, and a calibration result is obtained by combining the heights of the detection platform 1 and the conveyor belt 2 at the calibration position; and then, the high-speed rail brake pad is placed on the detection platform 1, the height of the high-speed rail brake pad relative to the detection platform 1, the conveyer belt 2 and the gap between the detection platform 1 and the conveyer belt 2 is identified and detected, and the height and the calibration result are compensated to obtain the complete thickness of the high-speed rail brake pad.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For embodiments of the method, reference is made to the description of the apparatus embodiments in part. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not limited to the present application. Numerous modifications and variations could be made to the present disclosure by those skilled in the art without departing from the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (5)
1. A thickness online measurement method on a high-speed rail brake pad production line adopts a measurement device which comprises a detection platform, a conveying belt, a laser sensor and a processor, wherein the detection platform is horizontally arranged at two sides of the conveying direction of the conveying belt, the plane where the detection platform is arranged is parallel to the plane where the conveying belt is arranged, and the distance between the plane where the conveying belt is arranged and the plane where the detection platform is arranged is adjustable; the distance between the detection platforms on the two sides of the conveying belt is smaller than the width of the high-speed rail brake pad; the laser sensor is a line sensor, is arranged above the conveying belt and is used for detecting the distance between the high-speed rail brake pad and the surface of the detection platform and/or the surface of the conveying belt, is connected with the processor, and is used for processing the detection data of the laser sensor, and the online thickness measuring method is characterized by comprising the following steps of:
s1: moving the conveying belt to a calibration position, wherein the calibration position is that the plane of the conveying belt is positioned below the plane of the calibration detection platform, starting a laser sensor to measure the distance between the detection platform and the conveying belt and calibrate depth data of a gap between the detection platform and the conveying belt to obtain a calibration result;
s2: placing a high-speed rail brake pad to be detected on a detection platform, moving a conveyer belt to a calibration position, and measuring the height of the high-speed rail brake pad relative to the plane of the detection platform and the plane of the conveyer belt;
s3: and (5) compensating the calibration result of the step (S1) with the measurement result of the step (S2) to obtain the thickness data of the high-speed rail brake pad.
2. The online thickness measuring method for the high-speed rail brake pad production line according to claim 1, characterized by further comprising the following steps of:
s4: the conveyer belt rises upwards and lifts the high-speed railway brake block and carries, and the treater drives sorter according to the thickness data drive high-speed railway brake block and carries out the classification to the high-speed railway brake block.
3. The online thickness measuring method for the high-speed rail brake pad production line according to claim 1, wherein the step S1 specifically comprises the following steps:
the laser sensor measures and obtains data of the distance between the detection platform and the conveying belt;
traversing the data to find depth data of a gap between the detection platform and the conveying belt, replacing the depth data of the gap between the detection platform and the conveying belt, and replacing the depth data of the gap between the detection platform and the conveying belt with height data of the detection platform and the conveying belt;
and storing the data of the distance between the replaced detection platform and the conveying belt.
4. The online thickness measuring method for the high-speed rail brake pad production line according to claim 1 or 2, wherein the step S2 and the step S3 are specifically as follows:
measuring the height between the plane of the high-speed rail brake pad and the plane of the detection platform and the plane of the conveyor belt by using a laser sensor, and judging whether the measured data is greater than a calibration result plus a set height threshold value;
if the measured data are larger than the calibration result and the set height threshold, the data are regarded as the surfaces of the high-speed rail brake pads, and then the surface data of all the high-speed rail brake pads are obtained through traversal one by one;
and calculating the average thickness of the high-speed rail brake pad.
5. The method for measuring the thickness of the high-speed rail brake pad on the production line of claim 4, wherein the height threshold is half of the minimum thickness of the high-speed rail brake pad.
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