Straightness calibration method for cloth guide roller

Abstract

The invention relates to the technical field of straightness measurement, and provides a straightness calibration method for a cloth guide roller, which comprises the following steps of: obtaining a corrected distance value according to a target distance value and an axial distance value; obtaining detection consistency according to the corrected distance value; obtaining the fault possibility according to the detection consistency, and screening to obtain a credible probe; acquiring a neighborhood distance value of the target distance value; obtaining the distance proximity according to the corrected distance value of the target distance value and the neighborhood distance value; obtaining measurement credibility according to the distance closeness of the target distance value and all neighborhood distance values of the target distance value; obtaining a single point location distance set; obtaining a result distance value according to the measurement credibility of the distance value in the single-point distance set; and obtaining a straightness detection result of the cloth guide roller according to the result distance value. The straightness error is obtained by obtaining the more credible result distance value, and the straightness detection accuracy of the cloth guide roller is improved.

Description

Technical Field

[0001] The invention relates to the technical field of straightness measurement, and in particular to a straightness calibration method for a cloth guide roller. Background Art

[0002] The cloth guide roller is a roller device used to transfer, guide and position cloth in the textile industry. As an important transmission component, the straightness of the cloth guide roller directly affects the quality and production efficiency of the product. The straightness of the cloth guide roller describes its deviation in the axial direction. In order to prevent the cloth from being offset or wrinkled during the production process, the straightness of the cloth guide roller needs to be calibrated after the production is completed.

[0003] To calibrate the straightness of the cloth guide roller, it is first necessary to detect the straightness of the cloth guide roller. At present, the photoelectric method is often used to detect the straightness of the cloth guide roller. Specifically, three diameter gauges are used to simultaneously measure the position information of the cloth guide roller at different positions, and then compare whether they are in the same straight line to obtain the straightness of the cloth guide roller. However, when performing the straightness detection, due to the different surface roughness of the cloth guide roller during the production process, the laser light irradiated on the cloth guide roller will be scattered in different directions, causing the photoelectric sensor at the receiving end to misjudge the source and direction of the light, resulting in the inability to complete the precise positioning of the contour edge of the cloth guide roller, thereby reducing the accuracy of the straightness detection of the cloth guide roller. Summary of the invention

[0004] The present invention provides a method for calibrating the straightness of a cloth guide roller to solve the problem of inaccurate straightness detection of the existing cloth guide roller. The technical solution adopted is as follows: The present invention provides a method for calibrating the straightness of a cloth guide roller, the method comprising the following steps: When the straightness of the cloth guide roller is detected, a distance value sequence of several probes is obtained; Record any distance value in the distance value sequence of any probe as a target distance value, obtain several axial distance values ​​of the target distance value, correct the target distance value according to all axial distance values ​​of the target distance value, and obtain a corrected distance value of the target distance value; According to the difference relationship between the corrected distance value of the target distance value and the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of other probes, the detection consistency of the target distance value is obtained; according to the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located, the fault possibility of the probe where the target distance value is located is obtained, and a number of reliable probes are screened according to the fault possibility of the probe; According to the axial distance value of the target distance value, several neighborhood distance values ​​of the target distance value are obtained; according to the similarity relationship between the target distance value and the corrected distance values ​​of its neighborhood distance values, the distance proximity between the target distance value and each of its neighborhood distance values ​​is obtained; according to the distance proximity between the target distance value and all of its neighborhood distance values, the measurement reliability of the target distance value is obtained; the distance values ​​in the distance value sequence of all reliable probes are used to form several single-point distance sets; according to the measurement reliability of the distance values ​​in the single-point distance sets, the result distance value of each single-point distance set is obtained; According to the result distance values ​​of all single-point distance sets, the straightness detection result of the cloth guide roller is obtained.

[0005] Furthermore, the specific method of obtaining the target distance value includes: The product of the preset roller speed and the preset acquisition frequency is recorded as the axial data interval; The distance value that is an integer multiple of the axial data interval from the target distance value is recorded as the axial distance value of the target distance value.

[0006] Furthermore, the target distance value is corrected according to all axial distance values ​​of the target distance value to obtain a corrected distance value of the target distance value, including the specific method of: In the distance value sequence where the target distance value is located, the closest The average of the axial distance values ​​is recorded as the corrected distance value of the target distance value; where, The preset axial distance quantity.

[0007] Further, the detection consistency of the target distance value is obtained according to the difference relationship between the corrected distance value of the target distance value and the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of other probes, including the specific method of: In the formula, is the detection consistency of the target distance value; is the corrected distance value of the target distance value; It is the average of the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of all probes; is the standard deviation of the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of all probes; is an exponential function with a natural constant as base; is the absolute value function.

[0008] Further, the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located is used to obtain the fault possibility of the probe where the target distance value is located, and a number of credible probes are obtained by screening according to the fault possibility of the probe, including the specific method of: The calculation method for the failure probability of the probe where the target distance value is located is: In the formula, The fault possibility of the probe where the target distance value is located; is the standard deviation of the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located; is the mean value of the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located; is an exponential function with a natural constant as base; is the hyperbolic tangent function; is the absolute value function; Sort all probes according to the probability of failure from small to large. probes are recorded as credible probes; among them, is the preset credible quantity.

[0009] Furthermore, the specific method of obtaining several neighborhood distance values ​​of the target distance value according to the axial distance value of the target distance value includes: In the distance value sequence where the target distance value is located, the two distance values ​​closest to the target distance value, the two axial distance values ​​closest to the target distance value, and the two distance values ​​closest to each axial distance value of the two axial distance values ​​are recorded as neighborhood distance values ​​of the target distance value.

[0010] Furthermore, the distance proximity between the target distance value and each of its neighboring distance values ​​is obtained based on the similarity relationship between the target distance value and the corrected distance values ​​of its neighboring distance values, including the specific method of: The inverse proportional normalization result of the absolute value of the difference between the corrected distance value of the target distance value and the corrected distance value of any neighboring distance value of the target distance value is recorded as the distance proximity between the target distance value and the neighboring distance value.

[0011] Furthermore, the measurement reliability of the target distance value is obtained according to the distance proximity between the target distance value and all its neighboring distance values, including the specific method of: The measurement reliability of the target distance value is calculated as follows: In the formula, is the measurement reliability of the target distance value; is the number of neighborhood distance values ​​of the target distance value; The distance between the target and its The distance closeness of the neighborhood distance values; The target distance value The detection consistency of the neighborhood distance values.

[0012] Furthermore, the distance values ​​in the distance value sequences of all the credible probes are used to form a plurality of single-point distance sets, including the specific method of: In the distance value sequences of all credible probes, all distance values ​​at the same moment are recorded as a single-point distance set.

[0013] Furthermore, the method of obtaining the result distance value of each single-point distance set according to the measurement credibility of the distance value in the single-point distance set includes the following specific methods: In the formula, For the The resulting distance value of a single point set; For the The number of distance values ​​in a single point set; For the The first Corrected distance value for each distance value; For the The first The measurement reliability of the distance value.

[0014] The beneficial effects of the present invention are as follows: in the process of straightness detection of the cloth guide roller, some detection results may be unreliable due to the influence of environmental factors. The cloth guide roller is measured multiple times using different probes, and the measurement results of each probe need to be analyzed. The present invention obtains the detection consistency of the target distance value and judges the credibility of each distance value through the difference relationship between the corrected distance value of the target distance value and the corrected distance value of the distance value at the same time as the target distance value in the distance value sequence of other probes; since some probes are subject to greater external interference, the detected data is unreliable, so the unreliable data needs to be removed. The present invention obtains the fault possibility of the probe where the target distance value is located through the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located, and then screens the reliable probes, thereby improving the credibility of the data; since the turning parameters of the local points on the cloth guide roller are extremely close, the corrected distance values ​​corresponding to the local points are relatively close. The present invention obtains the measurement credibility of the target distance value by combining the neighborhood distance value, and then obtains the result distance value of each single-point distance set according to the measurement credibility of the distance value in the single-point distance set. Thus, the present invention obtains the straightness error of the cloth guide roller through a more reliable result distance value, thereby improving the accuracy of the straightness detection of the cloth guide roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic flow chart of a method for calibrating the straightness of a cloth guide roller provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 , which shows a flow chart of a method for calibrating the straightness of a cloth guide roller provided by an embodiment of the present invention, the method comprising the following steps: Step S001: when performing straightness detection on a cloth guide roller, obtaining a distance value sequence of a plurality of measuring heads.

[0019] It should be noted that when the straightness of the cloth guide roller is detected, it is necessary to detect whether the height of the edge of the cloth guide roller is consistent when it is placed horizontally and rotated, so the laser transmitter is first used to obtain the distance from the upper edge of the cloth guide roller to the top of the laser transmitter when it is placed horizontally.

[0020] Specifically, on a fabric guide roller production line, when several batches of fabric guide rollers are produced, a plurality of fabric guide rollers are extracted from each batch of fabric guide rollers. Fabric guide rollers, of which: To preset the number of random inspections, this embodiment uses Take the example of the following description; all the cloth guide rollers extracted are placed on the detection rack for detection in sequence; among them, for the detection rack on which the cloth guide roller is placed, the detection rack on either side of the cloth guide roller is horizontally installed. A laser transmitter is provided, and a laser receiving device is installed at the detection frame position on the other side of the cloth guide roller; wherein the laser transmitter and the laser receiving device are used to measure the vertical distance from the top of the laser generator to the upper edge of the cloth guide roller; wherein, To preset the number of installations, this embodiment uses Take the example for description; a mechanical adjustment mechanism is arranged on the detection frame at the lower side of the cloth guide roller, wherein the mechanical adjustment mechanism comprises a precision slide rail and a roller bracket, wherein the precision slide rail is used to adjust the position of the laser transmitter, thereby changing the relative position of the cloth guide roller, and the roller bracket is used to roll the cloth guide roller.

[0021] Furthermore, any laser transmitter and the corresponding laser receiving device are recorded as a probe; when the detection frame is used to detect the straightness of the cloth guide roller, each probe is used to detect the cloth guide roller that needs to be detected at present; each time the cloth guide roller is detected, the placement angle of the cloth guide roller is initialized first to ensure that the placement angle of the cloth guide roller is consistent during each detection, so as to ensure that all probes detect the same point on the cloth guide roller at the same time in their respective detection processes; the cloth guide roller is driven by the roller bracket to The measuring head rotates at a speed of 1000 sec / rev. Each measuring head moves from one end of the fabric guide roller to the other along the precision slide rail. Slide once per second, and the length of each slide is mm, and use the probe to continuously collect the vertical distance from the top of the laser generator to the upper edge of the fabric guide roller. For any probe, when the probe slides from one end of the fabric guide roller to the other end, the time sequence of the vertical distance from the top of the laser generator to the upper edge of the fabric guide roller obtained by the probe is recorded as the distance value sequence of the probe; where the acquisition frequency of the probe is ;in, To preset the roller speed, To preset the probe sliding interval, is the preset sliding step size, is the preset acquisition frequency, and , that is, the measuring head slides once every time the cloth guide roller rotates a full circle. , , , Let's take this as an example.

[0022] Step S002: record any distance value in the distance value sequence of any probe as a target distance value, obtain several axial distance values ​​of the target distance value, and correct the target distance value according to all axial distance values ​​of the target distance value to obtain a corrected distance value of the target distance value.

[0023] It should be noted that when the distance value sequence is obtained by using the probe, since the distance value measured by the probe may have a small offset, the distance value sequence is first preliminarily denoised. The cloth guide roller is produced by a lathe. In order to ensure the processing quality, the feed speed of the cutter head is also relatively slow, which makes the radius corresponding to multiple points on the cloth guide roller at the same axial position within a continuous distance the same. Therefore, the distance value detected by the same probe at the same axial position on the cloth guide roller should also be the same, so the distance value sequence is preliminarily denoised accordingly.

[0024] It should be further explained that the roller rotation speed, the acquisition frequency of the probe and the probe sliding interval are fixed. First, it is necessary to obtain other points at the same axial position of the cloth guide roller represented by each distance value in the distance value sequence of each probe.

[0025] Specifically, any distance value in the distance value sequence of any probe is recorded as the target distance value; The product of the preset roller speed and the preset acquisition frequency is recorded as the axial data interval; The distance value that is an integer multiple of the axial data interval from the target distance value is recorded as the axial distance value of the target distance value.

[0026] It should be noted that, since the distance values ​​detected by the same probe at the same axial position on the cloth guide roller should be the same, the target distance value is denoised according to its axial distance value.

[0027] Specifically, in the distance value sequence where the target distance value is located, the closest The average of the axial distance values ​​is recorded as the corrected distance value of the target distance value; where, To preset the axial distance, this embodiment uses Let's take this as an example.

[0028] Step S003, obtaining the detection consistency of the target distance value based on the difference relationship between the corrected distance value of the target distance value and the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of other probes; obtaining the failure possibility of the probe where the target distance value is located based on the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located, and screening out several reliable probes based on the failure possibility of the probes.

[0029] It should be noted that due to the influence of environmental factors, some test results may be unreliable, so different probes are used to measure the cloth guide roller multiple times, and then the measurement results of each probe need to be analyzed. If the measurement results of the probe are generally different from those of other probes, it means that the probe scanning is likely to be affected by environmental factors. Therefore, the detection consistency of the distance value is obtained accordingly.

[0030] Specifically, the detection consistency of the target distance value is calculated as follows: In the formula, is the detection consistency of the target distance value; is the corrected distance value of the target distance value; It is the average of the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of all probes; is the standard deviation of the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of all probes; is an exponential function with a natural constant as base; is the absolute value function.

[0031] It should be noted that the greater the detection consistency of the target distance value, the more consistent the target distance value is with the detection results of multiple other probes, and the more reliable the detection result is.

[0032] It should be noted that some probes are subject to greater external interference, resulting in unreliable data, so it is necessary to remove the unreliable data. When the data detected by the probe is unreliable, the fluctuation of the detection consistency of the distance value detected by the probe is not large and is relatively small, or the detection consistency of some distance values ​​is very low, and the detection consistency of the distance value shows random fluctuations as a whole, so the possibility of probe failure is obtained based on this.

[0033] Specifically, the calculation method of the failure probability of the probe where the target distance value is located is: In the formula, The fault possibility of the probe where the target distance value is located; is the standard deviation of the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located; is the mean value of the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located; is an exponential function with a natural constant as base; is a hyperbolic tangent function, and this embodiment is used for normalization processing; is the absolute value function.

[0034] In the formula, The larger it is, the smaller the fluctuation of the detected distance value is, which means the possibility of probe failure is greater. The larger it is, the lower the detection consistency of some distance values ​​detected, and the overall detection consistency of the distance values ​​fluctuates randomly, which means the possibility of probe failure is greater.

[0035] It should be noted that in order to improve the accuracy of probe detection, a more accurate probe is selected to analyze the straightness of the cloth guide roller.

[0036] Specifically, all probes are sorted from small to large according to the possibility of failure of the probes. probes are recorded as credible probes; among them, To preset a reliable number, this embodiment uses Let's take this as an example.

[0037] Step S004, according to the axial distance value of the target distance value, obtain several neighborhood distance values ​​of the target distance value; according to the similarity relationship between the target distance value and the corrected distance values ​​of its neighborhood distance values, obtain the distance proximity between the target distance value and each of its neighborhood distance values; according to the distance proximity between the target distance value and all of its neighborhood distance values, obtain the measurement reliability of the target distance value; the distance values ​​in the distance value sequence of all reliable probes are formed into several single-point distance sets; according to the measurement reliability of the distance values ​​in the single-point distance sets, obtain the result distance value of each single-point distance set.

[0038] It should be noted that since a lathe is used in the production of the cloth guide roller, the lathe speed is high and the feed speed of the cutter head is slow, which makes the turning parameters of local points on the cloth guide roller extremely close, and thus makes the correction distance values ​​corresponding to the local points relatively close.

[0039] Specifically, in the distance value sequence where the target distance value is located, the two distance values ​​closest to the target distance value, the two axial distance values ​​closest to the target distance value, and the two distance values ​​closest to each axial distance value of the two axial distance values ​​are recorded as neighborhood distance values ​​of the target distance value; The inverse proportional normalization result of the absolute value of the difference between the corrected distance value of the target distance value and the corrected distance value of any neighboring distance value of the target distance value is recorded as the distance proximity between the target distance value and the neighboring distance value.

[0040] It should be further explained that when using nearby points to judge the point represented by the target distance value, the corrected distance value of the nearby point may not be accurate, so it is necessary to use the detection accuracy corresponding to the nearby point to adjust the distance proximity between the point represented by the target distance value and the nearby point, so as to obtain the measurement reliability of the target distance value.

[0041] The measurement reliability of the target distance value is calculated as follows: In the formula, is the measurement reliability of the target distance value; is the number of neighborhood distance values ​​of the target distance value; The distance between the target and its The distance closeness of the neighborhood distance values; The target distance value The detection consistency of the neighborhood distance values.

[0042] It should be noted that after obtaining the measurement reliability of the distance value, it is necessary to determine the result distance value of the point represented by the distance value. When the measurement reliability of the distance value is greater, the distance value is more likely to be close to the true distance value.

[0043] Specifically, in the distance value sequences of all credible probes, all distance values ​​at the same time are recorded as a single-point distance set; No. The calculation method of the resulting distance value of a single point set is: In the formula, For the The resulting distance value of a single point set; For the The number of distance values ​​in a single point set; For the The first Corrected distance value for each distance value; For the The first The measurement reliability of the distance value.

[0044] Step S005: Obtain the straightness detection result of the cloth guide roller according to the result distance values ​​of all single-point distance sets.

[0045] It should be noted that each single point set represents a point on the cloth guide roller, and the result distance value of each single point set represents the actual distance value corresponding to each single point set. After obtaining the actual distance value of each point on the cloth guide roller, it is necessary to judge the straightness of the cloth guide roller based on the actual distance values ​​of all points on the cloth guide roller.

[0046] Specifically, the result distance values ​​of all single-point sets whose intervals are equal to the axial data interval are arranged in the order of the time at which the single-point sets are located, so as to obtain a distance observation sequence; For any distance observation sequence, a two-dimensional rectangular coordinate system is constructed with time as the horizontal axis and the result distance value as the vertical axis. All the result distance values ​​in the distance observation sequence are mapped to the two-dimensional rectangular coordinate system, and the least squares method is used for straight line fitting to obtain the distance fitting straight line; wherein, the least squares method is a well-known technology, and the specific method is not introduced here; For any result distance value in the distance observation sequence, if the result distance value is above the distance fitting line in the two-dimensional rectangular coordinate system, the deviation coefficient of the result distance value is recorded as 1; if the result distance value is below the distance fitting line in the two-dimensional rectangular coordinate system, the deviation coefficient of the result distance value is recorded as -1; the product of the Euclidean distance between the result distance value and the distance fitting line in the two-dimensional rectangular coordinate system and the deviation coefficient of the result distance value is recorded as the deviation degree of the result distance value; Obtaining the maximum and minimum values ​​of the deviation degrees of all result distance values ​​in the distance observation sequence, and recording the difference between the maximum and the minimum as the straightness error index of the distance observation sequence; The mean of the straightness error index of all distance observation sequences is recorded as the straightness error of the cloth guide roller.

[0047] Furthermore, for any batch of cloth guide rollers, the average of the straightness errors of all cloth guide rollers in the batch is recorded as the overall straightness error of the batch; if the overall straightness error of the batch is greater than a preset error threshold, the cloth guide rollers in the batch are manually inspected; wherein the preset error threshold is 0.5 mm, and this embodiment is described using this as an example.

[0048] This embodiment adopts Model to present inverse proportional relationship and normalization, As the input of the model, the implementer can set the inverse proportional function and normalization function according to the actual situation.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calibrating the straightness of a cloth guide roller, characterized in that: The method comprises the following steps: When the straightness of the cloth guide roller is detected, a distance value sequence of several probes is obtained; Record any distance value in the distance value sequence of any probe as a target distance value, obtain a number of axial distance values ​​of the target distance value, correct the target distance value according to all axial distance values ​​of the target distance value, and obtain a corrected distance value of the target distance value; According to the difference relationship between the corrected distance value of the target distance value and the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of other probes, the detection consistency of the target distance value is obtained; according to the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located, the fault possibility of the probe where the target distance value is located is obtained, and a number of reliable probes are screened according to the fault possibility of the probe; According to the axial distance value of the target distance value, several neighborhood distance values ​​of the target distance value are obtained; according to the similarity relationship between the target distance value and the corrected distance values ​​of its neighborhood distance values, the distance proximity between the target distance value and each of its neighborhood distance values ​​is obtained; according to the distance proximity between the target distance value and all of its neighborhood distance values, the measurement reliability of the target distance value is obtained; the distance values ​​in the distance value sequence of all reliable probes are used to form several single-point distance sets; according to the measurement reliability of the distance values ​​in the single-point distance sets, the result distance value of each single-point distance set is obtained; According to the result distance values ​​of all single-point distance sets, the straightness detection result of the cloth guide roller is obtained.

2. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The specific method of obtaining the several axial distance values ​​of the target distance value includes: The product of the preset roller speed and the preset acquisition frequency is recorded as the axial data interval; The distance value that is an integer multiple of the axial data interval from the target distance value is recorded as the axial distance value of the target distance value.

3. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The target distance value is corrected according to all axial distance values ​​of the target distance value to obtain a corrected distance value of the target distance value, and the specific method includes: In the distance value sequence where the target distance value is located, the closest The average of the axial distance values ​​is recorded as the corrected distance value of the target distance value; where, The preset axial distance quantity.

4. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The detection consistency of the target distance value is obtained according to the difference relationship between the corrected distance value of the target distance value and the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of other probes, including the specific method of: In the formula, is the detection consistency of the target distance value; is the corrected distance value of the target distance value; It is the average of the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of all probes; is the standard deviation of the corrected distance values ​​of the distance values ​​at the same time as the target distance value in the distance value sequence of all probes; is an exponential function with a natural constant as base; is the absolute value function.

5. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The method of obtaining the fault possibility of the probe where the target distance value is located according to the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located, and screening and obtaining a number of credible probes according to the fault possibility of the probe, includes the following specific methods: The calculation method for the failure probability of the probe where the target distance value is located is: In the formula, The fault possibility of the probe where the target distance value is located; is the standard deviation of the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located; is the mean value of the detection consistency of all distance values ​​in the distance value sequence of the probe where the target distance value is located; is an exponential function with a natural constant as base; is the hyperbolic tangent function; is the absolute value function; Sort all probes according to the probability of failure from small to large. probes are recorded as credible probes; among them, is the preset credible quantity.

6. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The specific method of obtaining several neighborhood distance values ​​of the target distance value according to the axial distance value of the target distance value includes: In the distance value sequence where the target distance value is located, the two distance values ​​closest to the target distance value, the two axial distance values ​​closest to the target distance value, and the two distance values ​​closest to each axial distance value of the two axial distance values ​​are recorded as neighborhood distance values ​​of the target distance value.

7. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The method of obtaining the distance proximity between the target distance value and each of its neighboring distance values ​​according to the similarity relationship between the corrected distance values ​​of the target distance value and its neighboring distance values ​​includes: The inverse proportional normalization result of the absolute value of the difference between the corrected distance value of the target distance value and the corrected distance value of any neighboring distance value of the target distance value is recorded as the distance proximity between the target distance value and the neighboring distance value.

8. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The method of obtaining the measurement credibility of the target distance value according to the distance proximity between the target distance value and all its neighboring distance values ​​includes: The measurement reliability of the target distance value is calculated as follows: In the formula, is the measurement reliability of the target distance value; is the number of neighborhood distance values ​​of the target distance value; The distance between the target and its The distance closeness of the neighborhood distance values; The target distance value The detection consistency of the neighborhood distance values.

9. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The specific method of forming a plurality of single-point distance sets from the distance values ​​in the distance value sequences of all credible probes includes: In the distance value sequences of all credible probes, all distance values ​​at the same moment are recorded as a single-point distance set.

10. A method for calibrating the straightness of a cloth guide roller according to claim 1, characterized in that: The specific method of obtaining the result distance value of each single-point distance set according to the measurement credibility of the distance value in the single-point distance set is as follows: In the formula, For the The resulting distance value of a single point set; For the The number of distance values ​​in a single point set; For the The first Corrected distance value for each distance value; For the The first The measurement reliability of the distance value.

Images