CN110696170B - Control method for forming flatness of plate - Google Patents
Control method for forming flatness of plate Download PDFInfo
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- CN110696170B CN110696170B CN201910886374.0A CN201910886374A CN110696170B CN 110696170 B CN110696170 B CN 110696170B CN 201910886374 A CN201910886374 A CN 201910886374A CN 110696170 B CN110696170 B CN 110696170B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/12—Apparatus or processes for treating or working the shaped or preshaped articles for removing parts of the articles by cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/34—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring roughness or irregularity of surfaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The embodiment of the invention discloses a method for controlling the forming flatness of a plate, which comprises the following steps: step 100, adjusting the transmitting direction and angle of radar waves to enable the radar waves to cover the whole production line; step 200, calculating the vertical height from the surface of the gypsum board to a transmitting position through the time difference of radar wave propagation, and transmitting the calculation result to an identification center; step 300, setting a threshold value in the identification center, comparing the calculation result with the threshold value to form a compensation discrete value, and marking the compensation discrete value on the gypsum board image according to the same continuous color change scale; step 400, automatically discarding gypsum boards exceeding a threshold value according to the result of color identification recognition; the invention can detect the flatness of two sides of the gypsum board surface based on the continuous radar wave in a full-coverage manner, is favorable for improving the detection precision through internal calculation imaging, can also be convenient for quality testing personnel to quickly evaluate the production quality of the gypsum board through the generated image through the color identification, and is also convenient for automatic waste discharge.
Description
Technical Field
The embodiment of the invention relates to the technical field of process detection, in particular to a method for controlling the forming flatness of a plate.
Background
In the existing gypsum board production process, the production of gypsum boards is generally realized through an automatic discharging and leveling process, and the flatness of the surfaces of the gypsum boards needs to be detected in order to ensure the quality of products in the production process.
In the prior art, the detection of the flatness of the gypsum is generally detected by human eye recognition, so that a corresponding post is specially designed for quality control during high-precision production. However, it is known that it is difficult to grasp the reliability and balance of the monitoring quality in the manual monitoring mode, because the human eye recognition has the contingency and fatigue, the long-time detection inevitably generates errors, and the manual recognition is only reflected macroscopically and cannot be reflected microscopically. In addition, the mode of human eye identification cannot completely and clearly record the parameters related to the flatness in the production process, and is not beneficial to subsequent process optimization.
Disclosure of Invention
Therefore, the embodiment of the invention provides a method for controlling the flatness of a plate, which solves the problems that the detection quality of human eyes is not strictly controlled, flatness parameters cannot be completely recorded and the subsequent process optimization is not facilitated in the prior art by a radar wave detection mode.
In order to achieve the above object, an embodiment of the present invention provides the following: a method for controlling the flatness of a plate forming comprises the following steps:
step 100, adjusting the transmitting direction and angle of radar waves to enable the radar waves to cover the whole production line;
step 200, calculating the vertical height from the surface of the gypsum board to a transmitting position through the time difference of radar wave propagation, and transmitting the calculation result to an identification center;
step 300, setting a threshold value in the identification center, comparing the calculation result with the threshold value to form a compensation discrete value, and marking the compensation discrete value on the gypsum board image according to the same continuous color change scale;
and 400, automatically discarding the gypsum board exceeding the threshold value according to the result of the color identification recognition.
In step 100, two sets of radar wave emitting devices and receiving devices are respectively disposed on the upper and lower surfaces of the gypsum board, and both the radar wave emitting devices and the receiving devices are disposed in the normal plane of the gypsum board.
In a preferred embodiment of the present invention, the emitting angle of the radar wave emitting device is a fan shape covering the whole production line, and the receiving device is arranged along the emitting direction of the radar wave.
As a preferred embodiment of the present invention, in step 200, a specific method for calculating the vertical height through the radar wave propagation time difference is as follows:
step 201, determining or directly measuring the included angle alpha between each group of radar wave transmitting devices and the normal direction according to the transmitting direction and angle of radar wavesiWherein i is the serial number of the radar wave transmitting device;
step 202, calculating the time delta t of transmitting and receiving each group of radar wavesi；
Step 203, calculating the vertical height between each group of radar wave measurement gypsum board and the emission position as
And 204, arranging a plurality of groups of vertical heights along the emission direction of the radar waves, forming a discrete graph of the vertical heights according to the transmission speed of the gypsum board, and transmitting the discrete graph serving as a calculation result back to the identification center.
As a preferable scheme of the invention, the included angle between the emission direction of the radar waves and the boundary of the gypsum board is-42.5 degrees.
As a preferable aspect of the present invention, the calculation method of the compensation dispersion value includes:
determining the standard thickness h of the gypsum board according to design requirements0And a threshold value Δ h0；
Will be of standard thickness h0Adding and subtracting the set threshold value Δ h, respectively0Obtaining the allowable height variation range of delta h epsilon [ h ∈0-Δh0～h0+Δh0]；
And respectively solving the difference value of the calculated results to the delta h.
As a preferred scheme of the present invention, the method for identifying the image of the gypsum board specifically comprises:
making a difference discrete graph according to the discrete graph of the vertical height;
projecting the difference discrete graph on an image of the gypsum board according to an equal proportion, and drawing a contour graph by taking the difference discrete points as representation points;
and marking the contour line graph according to the same continuous color changing scale to form a color identification image graph.
As a preferable aspect of the present invention, the colors in the allowable height variation range in the color recognition image map are identified as blank or gradations of different color scales, and the entire color recognition image map is darker in color as the absolute value of the difference increases.
As a preferred aspect of the present invention, in step 400, several critical values for identification of different color identifiers are set, different disabling operations are determined according to the critical values, the same disabling operation is performed within the same critical value, and the critical values are identified in the color identification image by other distinguishable colors.
As a preferred aspect of the present invention, in step 400, the automatically discarding step includes the following steps:
determining an area needing to be discarded according to the result of the color identification;
marking an area needing waste discharge on a gypsum board image according to the specification of the gypsum board, automatically calculating the initial position of actual waste discharge cutting according to the mark on the gypsum board image, and realizing waste discharge through automatic cutting;
and automatically warning and generating a waste discharge record after automatically discharging waste.
The embodiment of the invention has the following advantages:
the invention is based on continuous radar wave detection, can selectively and fully cover and detect the flatness of two sides of the gypsum board surface according to requirements, is favorable for improving the detection precision through internal calculation imaging, and can also generate a transition color chart with the same color scale according to the detection result so as to mark different defects on the gypsum board image through the marking effect of the color, so that quality inspection personnel can quickly evaluate the production quality of the gypsum board through the generated image, and meanwhile, the automatic waste discharge is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a vertical height calculation principle in an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a control method of plate forming flatness, which mainly comprises the following three aspects:
firstly, detecting the flatness of the gypsum board through radar waves;
secondly, feeding back the detection result to a waste discharge platform, and determining a waste discharge starting point of the unqualified product according to the preset size standard of the gypsum board through the operation of the waste discharge platform, so as to cut off the unqualified part;
thirdly, the feeding mechanism and the leveling mechanism can be fed back according to the detection result in the embodiment, so that the feeding mechanism and the leveling mechanism can be adjusted in a feedback manner according to the detection result, and the flatness of the surface of the gypsum board is further improved.
In the embodiment, the method mainly comprises the first two aspects, namely, the unqualified gypsum board is automatically discarded based on the detection of the radar waves, so that the defect of human eye identification in the prior art is overcome, and the quality detection effect is improved.
As shown in fig. 1, the present invention specifically includes the following steps:
step 100, adjusting the transmitting direction and angle of radar waves to enable the radar waves to cover the whole production line;
step 200, calculating the vertical height from the surface of the gypsum board to a transmitting position through the time difference of radar wave propagation, and transmitting the calculation result to an identification center;
step 300, setting a threshold value in the identification center, comparing the calculation result with the threshold value to form a compensation discrete value, and marking the compensation discrete value on the gypsum board image according to the same continuous color change scale;
and 400, automatically discarding the gypsum board exceeding the threshold value according to the result of the color identification recognition.
In the above embodiment, the detection mechanism mainly includes two sets of radar wave emitting devices and receiving devices respectively disposed on the upper and lower surfaces of the gypsum board, and the radar wave emitting devices and the receiving devices can be respectively used for detecting the flatness of the two surfaces by being disposed on the upper and lower surfaces of the gypsum board.
Based on the flatness calculation principle of the invention, in order to reduce the calculation amount, the radar transmitting device and the receiving device are both arranged in the normal plane of the gypsum board. And only require to set up the radar installations in normal plane, do not have the requirement to the contained angle of its normal plane and gypsum board place plane, and any contained angle does not influence the detection of roughness promptly, in the reality only need consider how convenient setting radar installations can.
In the invention, in order to reduce the single calculation amount, the included angle between the emission direction of the radar wave and the boundary of the gypsum board is-42.5 degrees.
In the embodiment, since the gypsum board is a whole, the flatness of the whole gypsum board needs to be considered during detection, so that the emission angle of the radar wave emission device is set to be a sector, the included angle of the sector is based on covering the whole production line, meanwhile, in order to ensure the detection effect, the emission angle of the radar is generally slightly larger than the production line, and the detection data exceeding the part is removed as invalid data or critical data, so that the final detection effect is not influenced.
Since radar detection is used, a transmitting device and a receiving device are necessary, and therefore, in order to simplify the calculation process, the receiving device is arranged along the transmitting direction of the radar wave. In this embodiment, the densities of the transmitting device and the receiving device are selected according to the detection accuracy, and if m transmitting points and m receiving points are arranged on the width with the length of L, the measurement accuracy is m/L, that is, when the transmitting points/receiving points are uniformly distributed, the accuracy range controlled by each transmitting point/receiving point is m/L, and whether the accuracy can meet the actual requirement or not needs to be determined according to the specific detection requirement.
In step 200, as shown in fig. 2, a specific method for calculating the vertical height through the radar wave propagation time difference is as follows:
step 201, determining or directly measuring the included angle alpha between each group of radar wave transmitting devices and the normal direction according to the transmitting direction and angle of radar wavesiWherein i is the serial number of the radar wave transmitting device;
step 202, calculating the time delta t of transmitting and receiving each group of radar wavesi；
Step 203, calculating the vertical height between each group of radar wave measurement gypsum board and the emission position as
In the above three steps, the vertical height can be calculated, and it should be noted that the vertical height refers to the vertical distance from the actual gypsum board surface to the emission plane, and is not the height of the gypsum board surface, so that the distance between the upper surface and the lower surface of the gypsum board surface is not directly measured in the present embodiment, but is the distance from the fixed reflection surface to the actual gypsum board surface.
The idea of the measurement in the present invention is to measure the whole gypsum board by several pairs of emitting/receiving points arranged in a line, while each set of emitting/receiving points is discrete over the whole plane, due to the spacing between adjacent emitting/receiving points and due to the known speed of the gypsum board. The transmitting points/receiving points are used as basic reference points to establish a difference map, so that the purpose of monitoring is achieved.
In order to further facilitate the identification of the difference, the present embodiment further includes a step 204 of arranging several groups of vertical heights along the emitting direction of the radar wave, forming a discrete graph of the vertical heights according to the transmission speed of the gypsum board, and transmitting the discrete graph back to the identification center as a calculation result.
Since the flatness of the gypsum board has an allowable variation range, it can be considered as acceptable in the process as long as it is within the range, and the data needs to be compensated in order not to show a difference within a reasonable range in recognition.
In the present embodiment, as shown in step 300, the discrete value needs to be compensated, and the compensation discrete value is calculated by:
determining the standard thickness h of the gypsum board according to design requirements0And a threshold value Δ h0；
Will be of standard thickness h0Adding and subtracting the set threshold value Δ h, respectively0Obtaining the allowable height variation range of delta h epsilon [ h ∈0-Δh0～h0+Δh0]；
And respectively solving the difference value of the calculated results to the delta h.
As can be clearly determined in the above, the standard thickness h0And a threshold value Δ h0Are known and the allowable height variation range ah is fixed and can be considered as a property of the sum of a certain gypsum board and the process, which is related only to the standard thickness of the gypsum board and the allowable threshold value.
In the invention, the discrete points are compensated, so that the calculation process is simpler, on one hand, the calculation of fixed parameters is avoided, on the other hand, the interval of each difference value is convenient to divide, and the statistics is convenient.
After the difference is compensated, the gypsum board is combined with a plain image of the gypsum board to make a specific distribution diagram for convenient observation and identification, so that the distribution rule can be more clearly shown. Therefore, in the present embodiment, the method for marking the image of the gypsum board specifically includes:
making a difference discrete graph according to the discrete graph of the vertical height;
projecting the difference discrete graph on an image of the gypsum board according to an equal proportion, and drawing a contour graph by taking the difference discrete points as representation points;
and marking the contour line graph according to the same continuous color changing scale to form a color identification image graph.
In the embodiment, the image is marked according to the scale of the same color change, so that different flatness defects can be conveniently identified through color transition.
The colors in the allowable height variation range are identified as blank or gradations of different color scales in the color recognition image map, and the whole color recognition image map is darker in color as the absolute value of the difference value increases.
The blank mark is used because the blank mark is equally effective in the allowable range and does not need to be distinguished, and the other color gradient is used for marking in the allowable range on one hand and showing the change in the allowable range on the other hand to form a complete detection graph so as to facilitate the optimization adjustment of the subsequent process and the waste discharge of unqualified products.
For gypsum products, different degrees of defects can be used for different purposes, i.e. a defective product under the process requirements and possibly a normal product under another process requirement. Therefore, in order to reduce the waste discharge rate of the product, comprehensive consideration is needed to classify and discharge defects of different degrees so as to comprehensively utilize various materials.
Specifically, in step 400, several critical values for identification of different color identifiers are set, different disabling operations are determined according to the critical values, the same disabling operation is performed within the same critical value, and the critical values are identified in the color identification image map by other distinguishable colors.
In addition, in step 400, the automatically disabling includes the steps of:
determining an area needing to be discarded according to the result of the color identification;
marking an area needing waste discharge on a gypsum board image according to the specification of the gypsum board, automatically calculating the initial position of actual waste discharge cutting according to the mark on the gypsum board image, and realizing waste discharge through automatic cutting;
and automatically warning and generating a waste discharge record after automatically discharging waste.
As mentioned above, in the present invention, optimization and automatic waste discharging for subsequent processes are also required to be considered, so various parameters in production need to be recorded, the waste discharging process is also required to be performed on a production line, and in order not to influence the cutting sequence of the gypsum boards, the starting position and the end position of the waste discharging cutting must be determined based on the gypsum board production process, so as to realize automatic waste discharging by means of automatic cutting.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A method for controlling the flatness of a plate forming is characterized by comprising the following steps:
step 100, adjusting the transmitting direction and angle of radar waves to enable the radar waves to cover the whole production line;
step 200, calculating the vertical height from the surface of the gypsum board to a transmitting position through the time difference of radar wave propagation, and transmitting the calculation result to an identification center;
step 300, setting a threshold value in the identification center, comparing the calculation result with the threshold value to form a compensation discrete value, and marking the compensation discrete value on the gypsum board image according to the same continuous color change scale;
step 400, automatically discarding gypsum boards exceeding a threshold value according to the result of color identification recognition;
in step 200, the specific method for calculating the vertical height through the radar wave propagation time difference is as follows:
step 201, determining or directly measuring the included angle alpha between each group of radar wave transmitting devices and the normal direction according to the transmitting direction and angle of radar wavesiWherein i is the serial number of the radar wave transmitting device;
step 202, calculating the time delta t of transmitting and receiving each group of radar wavesi；
Step 203, calculating the vertical height between each group of radar wave measurement gypsum board and the emission position as
204, arranging a plurality of groups of vertical heights along the emission direction of the radar waves, forming a discrete graph of the vertical heights according to the transmission speed of the gypsum board, and transmitting the discrete graph serving as a calculation result back to an identification center;
the calculation method of the compensation discrete value comprises the following steps:
determining the standard thickness h of the gypsum board according to design requirements0And a threshold value Δ h0；
Will be of standard thickness h0Adding and subtracting the set threshold value Δ h, respectively0Obtaining the allowable height variation range of delta h epsilon [ h ∈0-Δh0～h0+Δh0]；
And respectively solving the difference value of the calculated results to the delta h.
2. The method of claim 1, wherein in step 100, the gypsum board includes two sets of radar wave emitting devices and receiving devices respectively disposed on the upper and lower surfaces of the gypsum board, and the radar wave emitting devices and the receiving devices are disposed in the normal plane of the gypsum board.
3. The method as claimed in claim 2, wherein the emitting angle of the radar wave emitting device is a fan shape, the radar wave covers the whole production line, and the receiving device is arranged along the emitting direction of the radar wave.
4. A method for controlling flatness of a formed sheet according to claim 1 or 3, wherein an angle between the emitting direction of the radar waves and the boundary of the gypsum sheet is-42.5 ° to 42.5 °.
5. The method for controlling the flatness of the formed board according to claim 1, wherein the method for marking the image of the gypsum board specifically comprises the following steps:
making a difference discrete graph according to the discrete graph of the vertical height;
projecting the difference discrete graph on an image of the gypsum board according to an equal proportion, and drawing a contour graph by taking the difference discrete points as representation points;
and marking the contour line graph according to the same continuous color changing scale to form a color identification image graph.
6. The method for controlling flatness of sheet material formation according to claim 5, wherein the colors in the allowable height variation range in the color identification image map are identified as blank or gradations of different color scales, and the entire color identification image map is darker in color as the absolute value of the difference increases.
7. The method as claimed in claim 6, wherein in step 400, a plurality of critical values for identification of different color marks are set, different discarding operations are determined according to the critical values, the same discarding operation is performed within the same critical value, and the critical values are identified in the color identification image by other distinguishable colors.
8. The method for controlling the flatness of a formed sheet according to claim 1, wherein in step 400, the automatically discarding step comprises the steps of:
determining an area needing to be discarded according to the result of the color identification;
marking an area needing waste discharge on a gypsum board image according to the specification of the gypsum board, automatically calculating the initial position of actual waste discharge cutting according to the mark on the gypsum board image, and realizing waste discharge through automatic cutting;
and automatically warning and generating a waste discharge record after automatically discharging waste.
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| WO2018081613A1 (en) | 2016-10-28 | 2018-05-03 | Ppg Industries Ohio, Inc. | Coatings for increasing near-infrared detection distances |
| US11561329B2 (en) | 2019-01-07 | 2023-01-24 | Ppg Industries Ohio, Inc. | Near infrared control coating, articles formed therefrom, and methods of making the same |
| CN116213271B (en) * | 2023-04-28 | 2023-08-11 | 山东瑞邦智能装备股份有限公司 | Automatic defect detection and intelligent removing device for decorative gypsum board and working method thereof |
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| CN2455763Y (en) * | 2000-12-15 | 2001-10-24 | 盛安连 | Laser surface flatness determiner |
| CN102853786B (en) * | 2012-08-31 | 2014-11-26 | 深圳先进技术研究院 | Apparatus and method for detecting flatness |
| CN103115590A (en) * | 2013-01-25 | 2013-05-22 | 浪潮电子信息产业股份有限公司 | PCB (printed circuit board) smoothness detection method |
| CN105547199A (en) * | 2015-09-28 | 2016-05-04 | 宇龙计算机通信科技(深圳)有限公司 | Workpiece flatness detection method and device |
| CN207019639U (en) * | 2017-08-11 | 2018-02-16 | 湖北韬明世家环保材料科技有限公司 | A kind of building board surface smoothness detection means |
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