A straightness calibration method for a fabric guiding roller

Abstract

The present invention relates to the technical field of straightness measurement, and proposes a straightness calibration method for a fabric guiding roller, including: obtaining a correction distance value according to a target distance value and its axial distance value; obtaining detection consistency according to the correction distance value; obtaining a failure possibility according to the detection consistency and screening to obtain a reliable probe; obtaining a neighborhood distance value of the target distance value; obtaining a distance proximity according to the correction distance value between the target distance value and its neighborhood distance value; obtaining a measurement credibility according to the distance proximity between the target distance value and all its neighborhood distance values; obtaining a single-point distance set; obtaining a result distance value according to the measurement credibility of the distance values in the single-point distance set; and obtaining a straightness detection result of the fabric guiding roller according to the result distance value. The present invention obtains the straightness error by obtaining a more reliable result distance value, and improves the accuracy of the straightness detection of the fabric guiding roller.

Description

Technical Field

[0001] The present invention relates to the technical field of straightness measurement, and particularly relates to a method for calibrating the straightness of a fabric guiding roller. Background Art

[0002] The fabric guiding roller is a roller device used for transferring, guiding, and positioning fabrics in the textile industry. As an important transmission component, the straightness of the fabric guiding roller directly affects the product quality and production efficiency. The straightness of the fabric guiding roller describes its deviation in the axial direction. In order to prevent the fabric from shifting or wrinkling during the production process, it is necessary to calibrate the straightness of the fabricated fabric guiding roller when the production is completed.

[0003] To calibrate the straightness of the fabric guiding roller, it is first necessary to detect the straightness of the fabric guiding roller. Currently, the optoelectronic method is often used to detect the straightness of the fabric guiding roller. Specifically, three diameter gauges are used to simultaneously measure the position information of different positions of the fabric guiding roller, and then compare whether they are on the same straight line to obtain the straightness of the fabric guiding roller. However, during the straightness detection, due to the different surface roughness conditions of the fabric guiding roller during the production process, the laser light irradiated onto the fabric guiding roller will scatter 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 accurately locate the contour edge of the fabric guiding roller, thereby reducing the accuracy of the straightness detection of the fabric guiding roller. Summary of the Invention

[0004] The present invention provides a method for calibrating the straightness of a fabric guiding roller to solve the problem of inaccurate straightness detection of the existing fabric guiding roller. The specific technical solution adopted is as follows:

[0005] The present invention proposes a method for calibrating the straightness of a fabric guiding roller, which includes the following steps:

[0006] When detecting the straightness of the fabric guiding roller, obtain a distance value sequence of several measuring heads;

[0007] Denote any distance value in the distance value sequence of any one measuring head as the target distance value, obtain several axial distance values of the target distance value, and correct the target distance value according to all the axial distance values of the target distance value to obtain the corrected distance value of the target distance value;

[0008] 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 moment as the target distance value in the distance value sequences of other measuring heads, obtain the detection consistency of the target distance value; according to the detection consistency of all the distance values in the distance value sequence of the measuring head where the target distance value is located, obtain the failure possibility of the measuring head where the target distance value is located, and screen several reliable measuring heads according to the failure possibility of the measuring head;

[0009] Obtain a plurality of neighborhood distance values of the target distance value according to the axial distance value of the target distance value; obtain the distance proximity between the target distance value and each of its neighborhood distance values according to the similarity relationship between the target distance value and the corrected distance values of its neighborhood distance values; obtain the measurement credibility of the target distance value according to the distance proximity between the target distance value and all of its neighborhood distance values; form a plurality of single-point distance sets with the distance values in the distance value sequences of all reliable probes; obtain the result distance value of each single-point distance set according to the measurement credibility of the distance values in the single-point distance set;

[0010] Obtain the straightness detection result of the fabric guiding roller according to the result distance values of all single-point distance sets.

[0011] Further, the specific method for obtaining a plurality of axial distance values of the target distance value includes:

[0012] Denote the product of the preset roller rotation speed and the preset acquisition frequency as the axial data interval;

[0013] Denote the distance value that is an integer multiple of the axial data interval away from the target distance value as the axial distance value of the target distance value.

[0014] Further, the specific method for correcting the target distance value according to all axial distance values of the target distance value to obtain the corrected distance value of the target distance value includes:

[0015] In the distance value sequence where the target distance value is located, denote the mean value of the nearest axial distance values to the target distance value as the corrected distance value of the target distance value; where is the preset number of axial distances.

[0016] Further, the specific method for obtaining the detection consistency 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 moment as the target distance value in the distance value sequences of other probes includes:

[0017]

[0018] In the formula, is the detection consistency of the target distance value; is the corrected distance value of the target distance value; is the mean value of the corrected distance values of the distance values at the same moment as the target distance value in the distance value sequences of all probes; is the standard deviation of the corrected distance values of the distance values at the same moment as the target distance value in the distance value sequences of all probes; is the exponential function with the natural constant as the base; is the absolute value function.

[0019] Furthermore, the method for obtaining the failure 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 several reliable probes according to the failure possibility of the probe includes the following specific methods:

[0020] The calculation method of the failure possibility of the probe where the target distance value is located is:

[0021]

[0022] In the formula, is the failure 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 the exponential function with the natural constant as the base; is the hyperbolic tangent function; is the absolute value function;

[0023] Sort all the probes in ascending order according to the failure possibility of the probes, and record the first probes as reliable probes; where is the preset reliable quantity.

[0024] Furthermore, the specific method for obtaining several neighborhood distance values of the target distance value according to the axial distance value of the target distance value includes:

[0025] In the distance value sequence where the target distance value is located, record 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 among the two axial distance values as the neighborhood distance values of the target distance value.

[0026] Furthermore, the specific method for obtaining the distance proximity between the target distance value and each of its neighborhood distance values according to the similarity relationship between the corrected distance value of the target distance value and the corrected distance value of its neighborhood distance value includes:

[0027] Record 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 one of the neighborhood distance values of the target distance value as the distance proximity between the target distance value and the neighborhood distance value.

[0028] Furthermore, the specific method for obtaining the measurement credibility of the target distance value according to the distance proximity between the target distance value and all its neighborhood distance values includes:

[0029] The calculation method of the measurement credibility of the target distance value is as follows:

[0030]

[0031] In the formula, is the measurement credibility of the target distance value; is the number of neighborhood distance values of the target distance value; is the distance proximity between the target distance value and its th neighborhood distance value; is the detection consistency of the th neighborhood distance value of the target distance value.

[0032] Further, the specific method for forming several single-point distance sets from the distance values in the distance value sequences of all reliable probes includes:

[0033] In the distance value sequences of all reliable probes, all distance values at the same moment are recorded as a single-point distance set.

[0034] Further, the specific method for obtaining the result distance value of each single-point distance set according to the measurement credibility of the distance values in the single-point distance set includes:

[0035]

[0036] In the formula, is the result distance value of the th single-point set; is the number of distance values in the th single-point set; is the corrected distance value of the th distance value in the th single-point set; is the measurement credibility of the th distance value in the th single-point set.

[0037] The beneficial effects of the present invention are as follows: During the straightness detection of the fabric guiding roller, due to the influence of environmental factors, some detection results may be untrustworthy. When using different probes to measure the fabric guiding roller multiple times, it is necessary to analyze the measurement results of each probe. The present invention obtains the detection consistency of the target 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 moment as the target distance value in the distance value sequence of other probes, and judges the credibility of each distance value; Since some probes are greatly interfered by the outside world, resulting in untrustworthy detected data, it is necessary to remove the untrustworthy data. The present invention obtains the failure 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 out trustworthy probes, improving the credibility of the data; Since the turning parameters of local points on the fabric guiding 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 fabric guiding roller through a more trustworthy result distance value, improving the accuracy of the straightness detection of the fabric guiding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic flowchart of a straightness calibration method for a fabric guiding roller provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] Please refer to Figure 1 , which shows a flowchart of a straightness calibration method for a fabric guiding roller provided by an embodiment of the present invention. The method includes the following steps:

[0042] Step S001: When detecting the straightness of the fabric guiding roller, obtain the distance value sequence of several measuring heads.

[0043] It should be noted that when detecting the straightness of the fabric guiding roller, it is necessary to detect whether the height of the edge is consistent when the fabric guiding roller is horizontally placed and rotating. Therefore, first use the laser emitter to obtain the distance from the upper edge of the fabric guiding roller to the top of the laser emitter when the fabric guiding roller is horizontally placed.

[0044] Specifically, on the fabric guiding roller production line, when several batches of fabric guiding rollers are produced, fabric guiding rollers are randomly selected from the fabric guiding rollers produced in each batch, where is the preset sampling quantity. In this embodiment, is taken as an example for description; all the selected fabric guiding rollers are placed on the detection rack and detected in turn; among them, for the detection rack with the fabric guiding roller placed, laser emitters are horizontally installed at the detection rack position on either side of the fabric guiding roller, and a laser receiving device is installed at the detection rack position on the other side of the fabric guiding roller; among them, the laser emitter 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 fabric guiding roller; among them, is the preset installation quantity. In this embodiment, is taken as an example for description; a mechanical adjustment mechanism is provided on the detection rack below the fabric guiding roller. The mechanical adjustment mechanism includes a precision slide rail and a roller bracket. Among them, the precision slide rail is used to adjust the position of the laser emitter, thereby changing the relative position of the fabric guiding roller, and the roller bracket is used to roll the fabric guiding roller.

[0045] Furthermore, any one laser emitter and the corresponding laser receiving device are denoted as a measuring head; when using the detection rack to detect the straightness of the fabric guiding roller, each measuring head is used to detect the currently required fabric guiding roller once; when detecting the fabric guiding roller each time, first initialize the placement angle of the fabric guiding roller to ensure that the placement angle of the fabric guiding roller is the same each time, so as to ensure that all measuring heads detect the same point on the fabric guiding roller at the same time sequence moment during their respective detection processes; the fabric guiding roller rotates at a speed of seconds per revolution driven by the roller bracket; each measuring head slides along the precision slide rail every seconds from one end of the fabric guiding roller to the other end, and the length of each slide is in millimeters, and continuously collect the vertical distance from the top of the laser generator to the upper side edge of the fabric guiding roller with a probe. For any probe, during the process of the probe sliding from one end of the fabric guiding roller to the other end, the time series sequence of the vertical distance from the top of the laser generator to the upper side edge of the fabric guiding roller obtained by the probe is recorded as the distance value sequence of the probe; wherein, the acquisition frequency of the probe is ; wherein, is the preset roller rotation speed, is the preset probe sliding interval, is the preset sliding step, is the preset acquisition frequency, and , that is, the probe slides once every time the fabric guiding roller rotates one full circle. In this embodiment, , , , is taken as an example for description.

[0046] Step S002: Denote any distance value in the distance value sequence of any probe as the target distance value, obtain several axial distance values of the target distance value, and correct the target distance value according to all the axial distance values of the target distance value to obtain the corrected distance value of the target distance value.

[0047] It should be noted that when obtaining the distance value sequence with a probe, since there may be a small deviation in the distance values measured by the probe, the distance value sequence is first preliminarily denoised. The fabric guiding roller is produced by a lathe. To ensure the processing quality, the feeding speed of the tool head is relatively slow, which makes the radii corresponding to multiple points within a continuous distance at the same axial position on the fabric guiding roller the same. Therefore, the distance values detected by the same probe at the same axial position on the fabric guiding roller should also be the same. Based on this, the distance value sequence is preliminarily denoised.

[0048] It should be further noted that the roller rotation speed, the acquisition frequency of the probe, and the probe sliding interval are fixed. First, it is necessary to obtain the other points at the same axial position of the points on the fabric guiding roller represented by each distance value in the distance value sequence of each probe accordingly.

[0049] Specifically, denote any distance value in the distance value sequence of any probe as the target distance value;

[0050] Denote the product of the preset roller rotation speed and the preset acquisition frequency as the axial data interval;

[0051] Denote the distance value that is an integer multiple of the axial data interval away from the target distance value as the axial distance value of the target distance value.

[0052] It should be noted that since the distance values detected at the same axial position of the same probe on the fabric guiding roller should be the same, the target distance value is denoised according to the axial distance value of the target distance value.

[0053] Specifically, in the distance value sequence where the target distance value is located, the average value of the axial distance values closest to the target distance value is denoted as the corrected distance value of the target distance value; where is the preset number of axial distances. In this embodiment, is taken as an example for description.

[0054] Step S003: Obtain the detection consistency 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 moment as the target distance value in the distance value sequences of other probes; obtain the failure possibility of the probe where the target distance value is located according to the detection consistency of all the distance values in the distance value sequence of the probe where the target distance value is located, and screen out several credible probes according to the failure possibility of the probes.

[0055] It should be noted that due to the influence of environmental factors, some detection results may be untrustworthy. Therefore, the fabric guiding roller is measured multiple times using different probes. Furthermore, it is necessary to analyze the measurement results of each probe. If the measurement results of this probe are generally different from those of other probes, it indicates that the scanning of this probe is likely to be affected by environmental factors. Therefore, the detection consistency of the distance values is obtained accordingly.

[0056] Specifically, the calculation method of the detection consistency of the target distance value is:

[0057]

[0058] In the formula, is the detection consistency of the target distance value; is the corrected distance value of the target distance value; is the average value of the corrected distance values of the distance values at the same moment as the target distance value in the distance value sequences of all probes; is the standard deviation of the corrected distance values of the distance values at the same moment as the target distance value in the distance value sequences of all probes; is the exponential function with the natural constant as the base; is the absolute value function.

[0059] 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 other multiple probes, and the more trustworthy the detection results are.

[0060] It should be noted that since some probes are greatly interfered by the outside world, the detected data is untrustworthy, so the untrustworthy data needs to be removed. When the data detected by the probe is untrustworthy, the fluctuations in the detection consistency of the distance values detected by the probe are small and relatively consistent, or the detection consistency of some distance values is very low, and the detection consistency of the distance values as a whole shows random fluctuations. Therefore, the probability of the probe failing is obtained based on this.

[0061] Specifically, the calculation method for the probability of failure of the probe where the target distance value is located is as follows:

[0062]

[0063] In the formula, is the probability of failure 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 the exponential function with the natural constant as the base; is the hyperbolic tangent function, which is used for normalization processing in this embodiment; is the absolute value function.

[0064] In the formula, The larger it is, the smaller and more consistent the fluctuations in the detection consistency of the detected distance values are, indicating a greater probability of probe failure; The larger it is, the lower the detection consistency of some of the detected distance values is, and the detection consistency of the distance values as a whole shows random fluctuations, indicating a greater probability of probe failure.

[0065] It should be noted that in order to improve the accuracy of probe detection, more accurate probes are selected to analyze the straightness of the guide cloth roller.

[0066] Specifically, all the probes are sorted in ascending order of the probability of failure, and the first probes are recorded as reliable probes; among them, is the preset reliable quantity, and this embodiment takes as an example for description.

[0067] Step S004: Obtain a number of neighborhood distance values of the target distance value according to the axial distance value of the target distance value; obtain the distance proximity between the target distance value and each of its neighborhood distance values according to the similarity relationship between the target distance value and the correction distance value of its neighborhood distance values; obtain the measurement credibility of the target distance value according to the distance proximity between the target distance value and all of its neighborhood distance values; form a number of single-point distance sets with the distance values in the distance value sequences of all reliable probes; obtain the result distance value of each single-point distance set according to the measurement credibility of the distance values in the single-point distance set.

[0068] It should be noted that since a lathe is used in the production of the fabric guiding roller, the lathe speed is relatively high and the feed speed of the cutting tool is relatively slow, which makes the turning parameters of local points on the fabric guiding roller extremely close, and thus the correction distance values corresponding to the local points are relatively close.

[0069] 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 among the two axial distance values are recorded as the neighborhood distance values of the target distance value.

[0070] The inverse proportional normalization result of the absolute value of the difference between the correction distance value of the target distance value and the correction distance value of any one of its neighborhood distance values is denoted as the distance proximity between the target distance value and this neighborhood distance value.

[0071] It should be further noted that when using nearby points to judge the point represented by the target distance value, the correction distance values of the nearby points may not be accurate. Therefore, it is necessary to adjust the distance proximity between the point represented by the target distance value and the nearby points by using the detection accuracy corresponding to the nearby points, so as to obtain the measurement credibility of the target distance value.

[0072] The calculation method of the measurement credibility of the target distance value is:

[0073]

[0074] In the formula, is the measurement credibility of the target distance value; is the number of neighborhood distance values of the target distance value; is the distance proximity between the target distance value and its th neighborhood distance value; is the detection consistency of the th neighborhood distance value of the target distance value.

[0075] It should be noted that after obtaining the measurement credibility of the distance value, it is necessary to determine the result distance value of the point position represented by the distance value. When the measurement credibility of the distance value is greater, the distance value is more likely to be close to the true distance value.

[0076] Specifically, in the distance value sequence of all credible probes, all the distance values at the same moment are recorded as a single-point position distance set;

[0077] The calculation method of the result distance value of the single-point position set is as follows:

[0078]

[0079] In the formula, is the result distance value of the th single-point position set; is the number of distance values in the th single-point position set; is the corrected distance value of the th distance value in the th single-point position set; is the measurement credibility of the th distance value in the th single-point position set.

[0080] Step S005: Obtain the straightness detection result of the guide cloth roller according to the result distance values of all single-point position distance sets.

[0081] It should be noted that each single-point position set represents a point position on the guide cloth roller, and the result distance value of each single-point position set represents the actual distance value corresponding to each single-point position set. After obtaining the actual distance values of each point position on the guide cloth roller, it is necessary to judge the straightness of the guide cloth roller according to the actual distance values of all point positions on the guide cloth roller.

[0082] Specifically, the result distance values of all single-point position sets with an axial data interval are arranged in the order of the time when the single-point position sets are located to obtain a distance observation sequence;

[0083] For any distance observation sequence, with time as the horizontal axis and the result distance value as the vertical axis, a two-dimensional rectangular coordinate system is constructed, and all the result distance values in the distance observation sequence are mapped into this two-dimensional rectangular coordinate system, and the least squares method is used for linear fitting to obtain a distance fitting straight line; among them, the least squares method is a well-known technology, and the specific method will not be introduced here;

[0084] 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 denoted as the deviation degree of the result distance value.

[0085] Obtain the maximum and minimum values of the deviation degrees of all result distance values in the distance observation sequence, and denote the difference between the maximum value and the minimum value as the straightness error index of the distance observation sequence.

[0086] Denote the mean value of the straightness error indices of all distance observation sequences as the straightness error of the guide cloth roller.

[0087] Furthermore, for any batch of guide cloth rollers, denote the mean value of the straightness errors of all guide cloth rollers in the batch as the overall straightness error of the batch; if the overall straightness error of the batch is greater than the preset error threshold, perform manual inspection on the guide cloth rollers in the batch; where the preset error threshold is 0.5 millimeters, and this embodiment is described by taking this as an example.

[0088] This embodiment uses a model to present the inverse proportional relationship and normalization processing, is the input of the model, and the implementer can set the inverse proportional function and normalization function according to the actual situation.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention shall be included within 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.

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