A glass thickness multi-point online detection system and method

Abstract

The present invention discloses a multi-point online detection system and method for glass thickness, including a measuring unit, a control unit, a processing unit and a background system; the measuring unit includes a plurality of measuring heads arranged along the width direction of the glass to be measured on the production line, and the two outermost measuring heads are installed on a motion module for controlling the corresponding measuring heads to move in a direction parallel to the width of the glass to be measured; the control unit is used to control each measuring head to obtain measurement data and control the movement of the motion module; the processing unit is used to receive and process the measurement data obtained by the measuring head and upload it to the background system; the background system is used for users to set measurement parameters and analyze the thickness and / or width of the glass to be measured. This solution designs the two measuring heads on both sides to be movable through the motion module to meet the measurement position adjustment requirements of different glasses, and quickly obtains the glass width through certain control means and calculation methods by utilizing the movable ability of the measuring head, without the need for additional complex structures.

Description

Technical Field

[0001] The invention belongs to the technical field of glass detection, and in particular relates to a multi-point online detection system for glass thickness. Background Art

[0002] The thickness of photovoltaic glass is one of the important factors affecting the quality of photovoltaic glass; the transmittance of photovoltaic glass is an important factor affecting the photoelectric conversion efficiency of photovoltaic modules. The traditional photovoltaic glass thickness detection is a sampling inspection, that is, taking samples from the production line and using a dedicated thickness measurement tool for manual sampling measurement. Traditional detection is time-consuming and labor-intensive. If manual monitoring is not timely, a large number of unqualified products will be produced due to poor thickness, which will directly cause economic losses. The glass online detection system adopts advanced online photovoltaic glass thickness detection technology, which is not only beneficial to guiding production, product precision control and back-end processing quality assurance, but also replaces the manual cutting and measurement of quality inspection staff to achieve the purpose of reducing staff. It is also a good image display of the company's internal control quality management for customers. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a glass thickness multi-point online detection system and a glass thickness multi-point online detection method based on the system.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A glass thickness multi-point online detection system, comprising a measuring unit, a control unit, a processing unit and a background system;

[0006] The measuring unit comprises a plurality of measuring heads arranged along the width direction of the glass to be measured on the assembly line, and the two outermost measuring heads are mounted on a motion module for controlling the corresponding measuring heads to move in a direction parallel to the width of the glass to be measured;

[0007] A control unit, used to control each measuring head to obtain measurement data according to the measurement parameters set by the background system, and to control the movement of the motion module;

[0008] The processing unit is used to receive and process the measurement data acquired by the measuring head, and upload the processed measurement results to the background system;

[0009] The backend system is used for users to set measurement parameters and analyze the thickness and / or width of the glass to be measured based on the received data.

[0010] In the above-mentioned multi-point on-line glass thickness detection system, the connecting line of the two outermost measuring heads of the measuring unit is parallel to the width direction of the glass to be measured.

[0011] In the above-mentioned multi-point on-line glass thickness detection system, the connection line of the multiple measuring heads of the measuring unit forms a straight line, and the straight line is parallel to the width direction of the glass to be measured.

[0012] In the above-mentioned multi-point online detection system for glass thickness, the multiple measuring heads of the measuring unit are installed above the roller of the glass assembly line, and are used to perform online detection on the glass to be measured that is transported by the roller of the glass assembly line;

[0013] The multiple measuring heads have the same height relative to the glass production line roller.

[0014] In the above-mentioned multi-point online detection system for glass thickness, the measuring unit includes five measuring heads, which are respectively the first measuring head, the second measuring head, the third measuring head, the fourth measuring head and the fifth measuring head from one end to the other end in the width direction of the glass to be measured;

[0015] The first measuring head and the fifth measuring head are mounted on the motion module.

[0016] In the above-mentioned multi-point online glass thickness detection system, the measurement parameters include the measurement interval and the number of measurement points;

[0017] The control unit controls each measuring head to obtain a plurality of measurement data at each measuring time point according to the measurement interval;

[0018] The processing unit receives a plurality of measurement data at each measurement time point, removes abnormal data and takes an average value to obtain the measurement result of the corresponding measuring head at the corresponding measurement time point;

[0019] The measurement parameters also include thickness range;

[0020] The background system records the measurement results of each measuring head at each measurement time point. When the measurement results of any measuring head exceed the thickness range, an over-standard alarm is triggered and the corresponding data is highlighted.

[0021] In the above-mentioned multi-point online detection system for glass thickness, the processing unit stores a channel offset group set for various embossing structures and depths;

[0022] The processing unit is used to determine the channel offset group according to the embossing structure and depth of the glass to be tested, and to correct the measurement results of each measuring head using the corresponding channel offset and then upload them to the background system.

[0023] In the above-mentioned multi-point online detection system for glass thickness, the motion module includes a sliding belt extending along the width direction of the glass to be measured, and the corresponding measuring head is arranged on the sliding belt to make linear motion driven by the sliding belt. The sliding belt is connected to a driving motor for driving the sliding belt to move, and limit sensors are respectively arranged at both ends of the sliding belt, and the limit sensors and the driving motor are both connected to the control unit;

[0024] The motion module also includes a wire groove track located on the adjacent surface of the sliding belt and extending along the extending direction of the sliding belt, wherein a wire groove is laid in the wire groove track, and the wire groove is a chain-like structure composed of multiple wire groove blocks hinged at the head and tail;

[0025] One end of the wire trough is fixed on the wire trough track, and the other end is connected to a measuring head located on a sliding belt so as to move along with the measuring head.

[0026] A multi-point online detection method for glass thickness, comprising:

[0027] According to the measurement parameters, a plurality of measuring heads arranged in the width direction of the glass to be measured are controlled to obtain multi-point and single-point multiple-time measurement data for the glass to be measured moving in the length direction;

[0028] Processing the measurement data to obtain the measurement results at each time point;

[0029] Perform peel thickness detection based on the processed measurement results;

[0030] Control the two outermost measuring heads to move slowly outwards respectively and record real-time measurement data;

[0031] Record the time point when the real-time measurement data starts to be greater than the set threshold to obtain the movement time;

[0032] Calculate the width of the glass to be measured based on the moving speed, moving time and starting position of the measuring head.

[0033] In the above-mentioned multi-point online detection method for glass thickness, the glass thickness detection method is:

[0034] Receive multiple measurement data at each measurement time point, remove abnormal data and take the average value to obtain the measurement result of the corresponding measuring head at the corresponding measurement time point;

[0035] According to the embossing structure and depth of the glass to be tested, the measurement results of each measuring head are corrected using the corresponding channel offset;

[0036] Determine in real time whether the glass thickness exceeds the thickness range based on the calibrated measurement results;

[0037] The glass width is calculated as:

[0038] W=L1+L2+L3;

[0039] L3 is the distance between the starting positions of the two outermost measuring heads;

[0040] L1=v1*t1;

[0041] L2=v2*t2;

[0042] v1 represents the moving speed of one of the outermost measuring heads, and v2 represents the moving speed of the other outermost measuring head;

[0043] t1 represents the movement time of one of the outermost measuring heads;

[0044] t2 is the moving time of the other outermost measuring head

[0045] The advantages of the present invention are:

[0046] 1. This solution adopts a single-point multiple-detection method for the collected data. First, the abnormal data is eliminated from the single-point data, and then the valid data is averaged to improve the measurement accuracy. Finally, the data is calibrated according to the empirical value and the embossed structure and depth of the current glass to be tested, which effectively overcomes the influence of the pattern surface on the test results and accurately reflects the real-time thickness of the glass;

[0047] 2. This solution uses five measuring heads for measurement, which can meet the needs of various customers for multiple sets of measurement data. At the same time, the two measuring heads on both sides are designed to be movable left and right through the motion module. On the one hand, it can meet the measurement position adjustment needs of different glasses. On the other hand, by utilizing the movable ability of the measuring head, the glass width can be quickly obtained through certain control means and calculation methods without the need for additional complex structures.

[0048] 3. This solution can detect glass thickness in real time and intuitively display the glass thickness detection status to users in the form of data tables and real-time thickness curves. By accurately controlling the glass thickness, it helps to improve the quality and consistency of the final product;

[0049] 4. This solution proposes a chain-shaped cable trough with multiple cable trough blocks hinged at the head and tail for the moving measuring head, and one end of the cable trough is fixed on the cable trough track, and the other end moves with the measuring head. Even if the measuring head is moving, the cable can be kept neat and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a circuit structure block diagram of the glass thickness multi-point online detection system of the present invention;

[0051] Figure 2It is a schematic diagram of the installation of each unit on the roller of the glass production line in the multi-point online detection system of glass thickness of the present invention;

[0052] Figure 3 Schematic diagram of the installation of each unit in the glass thickness multi-point online detection system of the present invention on the glass production line roller Figure 2 ;

[0053] Figure 4 It is the real-time measurement result of the glass thickness multi-point online detection system of the present invention;

[0054] Figure 5 for Figure 3 A magnified view of part A;

[0055] Figure 6 It is a flow chart of the detection method in the glass thickness multi-point online detection system of the present invention;

[0056] Figure numerals: measuring unit 1; measuring head 11; first measuring head 111; second measuring head 112; third measuring head 113; fourth measuring head 114; fifth measuring head 115; motion module 12; sliding belt 121; driving motor 122; limit sensor 123; wire groove track 124; wire groove 125; connecting rod 126; control unit 2; processing unit 3; background system 4; glass assembly line roller 5. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] like Figure 1-Figure 3 As shown, this solution provides a multi-point online detection system for glass thickness, including a measuring unit 1, a control unit 2, a processing unit 3 and a background system 4.

[0059] The measuring unit 1 includes a plurality of measuring heads 11 arranged along the width direction of the glass to be measured on the assembly line, and the two measuring heads 11 located at the outermost side are installed in a motion module 12 for controlling the corresponding measuring heads 11 to move in a direction parallel to the width of the glass to be measured. In the present embodiment, five measuring heads are provided, and all of them adopt spectral confocal sensors. The thickness measurement principle of the spectral confocal sensor is to establish a corresponding relationship between distance and wavelength through the principle of optical dispersion to obtain the thickness of the object to be measured. This process adopts the existing technology and will not be described in detail here. Taking the figure as an example, from the left end to the right end in the width direction of the glass to be measured, there are respectively the first measuring head 111, the second measuring head 112, the third measuring head 113, the fourth measuring head 114, and the fifth measuring head 115. The first measuring head 111 and the second measuring head 112 are installed on the motion module 12. When put into use, more or less measuring heads can also be provided, as long as the outermost side is two movable measuring heads, and there is at least one fixed measuring head between the two movable measuring heads.

[0060] Preferably, the connection line of the multiple measuring heads 11 of the measuring unit 1 is a straight line, and the straight line is parallel to the width direction of the glass to be measured. It should be noted that when put into use, it is not necessary for all five measuring heads to be on the same straight line, or even if they are on the same straight line, they are not necessarily parallel to the width direction of the glass to be measured, as long as the connection line of the two outermost measuring heads 11 is parallel to the width direction of the glass to be measured, and the movement path of the two measuring heads during movement is parallel to the width direction of the glass to be measured, so as to ensure the accuracy of width measurement.

[0061] Specifically, the multiple measuring heads 11 of the measuring unit 1 are installed above the glass assembly line roller 5 for online detection of the glass to be measured transported by the glass assembly line roller 5 . The multiple measuring heads 11 are at the same height relative to the glass assembly line roller 5 .

[0062] The control unit 2 is used to control the measuring head 11 to obtain measurement data and control the motion module 12 to move according to the measurement parameters set by the background system 4. The measurement parameters include the thickness range (standard thickness value and its upper and lower limit thresholds, and the normal thickness range is obtained according to the standard thickness value and its upper and lower limit thresholds), the measurement interval, the number of measurement points, the measuring position of the measuring head, etc. The position of each measuring head is determined according to the length of the entire installation strip. The three measuring heads 112, 113, and 114 in the middle are fixed, and the two measuring heads 111 and 115 on both sides are movable and have an initial position. This initial position is the parameter position set by the user, as shown in Table 1 below. Assuming that the length of the installation strip is 6000mm, from left to right, the position coordinates are 0mm~6000mm respectively, the initial position of the first channel (the first measuring head 111) is 2080mm, and the initial position of the fifth channel (the fifth measuring head 115) is 4338mm, then the initial distance between the two measuring heads is 4338-2080=2258mm.

[0063] Table 1 Recipe

[0064]

[0065] Users can set up multiple groups of recipes in the system in advance according to their needs. When a certain glass needs to be tested, the user can quickly select the corresponding recipe as needed to quickly complete the parameter setting.

[0066] The measurement interval refers to the time interval between every two point measurements. In this embodiment, one second is one point. At each point, that is, at each measurement time point, the control unit 2 controls the measuring head 11 to obtain a plurality of measurement data.

[0067] The processing unit 3 is used to receive and process the measurement data obtained by the measuring head 11, and upload the processed results to the background system 4. At each time point, the processing unit 3 will receive multiple measurement data, and some of these measurement data may contain extremely weak signals or abnormal number of reflected signal peaks. The processing unit 3 removes these abnormal data and takes the average value to obtain the measurement result of the corresponding measuring head 11 at the corresponding measurement time point.

[0068] Preferably, the processing unit 3 stores a channel offset group set for various embossing structures and depths, and the processing unit 3 is used to determine the channel offset group according to the embossing structure and depth of the current glass to be measured, and use the corresponding channel offset to correct the measurement results of each measuring head 11. There will be embossed patterns on one side of the photovoltaic glass. The pattern surface will affect the wavelength of the reflected light received by the measuring head to a certain extent, thereby affecting the measurement results. In addition, the relative position of the measuring head and the glass surface is different, and the degree of influence will be slightly different. This solution provides a channel offset setting function. The user can set the channel offset for the measuring head at each position according to experience for various embossing structures and depths. Table 2 shows the channel offset for a certain glass to be measured. When the thickness of this type of glass needs to be measured, the user manually selects, or the system selects the channel offset group in Table 2 through image recognition of the glass to be measured. Then the measurement result is corrected for each channel according to the offset of each channel. This solution can overcome the influence of the embossed structure on the detection of glass thickness through multiple measurements at a single point, and the offset correction method can improve the accuracy of the real-time thickness of the glass.

[0069] Table 2 Channel offsets of a group of channel offsets

[0070] Fifth channel mm -0.011 Fourth channel mm -0.016 The third channel mm -0.021 Second channel mm 0.022 First channel mm -0.023

[0071] The backend system 4 is used for the user to set measurement parameters and analyze the thickness and width of the glass to be measured according to the received data.

[0072] Glass thickness analysis method is:

[0073] like Figure 4 As shown, the background system 4 records the measurement results of each measuring head 11 at each measurement time point. When the measurement result of any measuring head 11 exceeds the thickness range, an over-standard alarm is triggered and the corresponding data is highlighted. In this embodiment, the formula in Table 1 is taken as an example. When the result is close to exceeding the standard, the corresponding data is displayed in orange. Figure 4 There are two values ​​close to exceeding the standard of 2.15mm. When the result exceeds the standard, the display is red, the corresponding alarm light is on and the alarm lasts for 30 seconds. At the same time, a curve graph is provided to facilitate intuitive display of curve changes. Figure 4 The measurement results of 21 measurement time points from 2024 / 3 / 18 8:59:34s to 2024 / 3 / 18 8:59:54s are given in the graph. From the curve chart, it can be clearly seen whether the thickness of the glass to be tested exceeds the standard, and at which monitoring point the thickness exceeds the standard.

[0074] Specifically, Figure 5As shown, the motion module 12 includes a sliding belt 121 extending along the width direction of the glass to be measured, and the corresponding measuring head 11 is arranged on the sliding belt 121 to make a linear motion driven by the sliding belt 121, and makes a linear motion along the width direction of the glass to be measured. The sliding belt 121 is connected to a driving motor 122 for driving the sliding belt 121 to move, and limit sensors 123 are respectively arranged at both ends of the sliding belt 121, and the limit sensors 123 and the driving motor 122 are both connected to the control unit 2, and the control unit 2 controls the driving motor 122 to move, thereby controlling the measuring head 11 to slide left and right.

[0075] Preferably, the motion module 12 further comprises a wire groove track 124 located on the adjacent surface of the sliding belt 121 and extending along the extending direction of the sliding belt 121. A wire groove 125 is laid in the wire groove track 124. The wire groove 125 is a chain-like structure with multiple wire groove blocks hinged end to end. Figure 5 One end located in the wire slot track 124, referred to as the lower end, is fixed on the wire slot track 124, and the other end, i.e., the end located above the wire slot track 124, referred to as the upper end, is connected to the measuring head 11 located on the sliding belt 121 through the connecting rod 126 to move with the measuring head 11. The wiring of the sensor wiring at the wire slot is that after being connected from the outside, it extends from the lower end along the wire slot 125 to the upper end, and then is connected to the corresponding measuring head from the upper end. Figure 5 In the embodiment, the fifth measuring head 115 is connected. A chain-shaped wire trough is proposed for the moving measuring head, which is hinged by multiple wire trough blocks, and one end of the wire trough is fixed on the wire trough track, and the other end moves with the measuring head. Even if the measuring head is moving, the cable can be kept neat and reliable.

[0076] Specifically, Figure 6 As shown, the glass thickness multi-point online detection method of the above-mentioned glass thickness multi-point online detection system is as follows:

[0077] First make some initial settings, such as system login, database check, etc., and then perform corresponding operations in the system interface, such as thickness measurement, recipe setting, and drawing amount calculation.

[0078] Recipe setting refers to providing users with the recipe setting function shown in Table 1. Later, users only need to select the recipe to quickly set the measurement parameters.

[0079] The calculation of the pulling amount includes the original film pulling amount, the finished product pulling amount, and the original film loss pulling amount. The calculation method of the original film pulling amount is:

[0080] Glass sheet pulling amount = pulling speed m / h*board width mm*average thickness mm*density kg / m³*1000 000m3*24h;

[0081] The calculation method of finished product pulling amount is:

[0082] Finished glass pulling amount = finished glass length * finished glass width (mm) * average thickness (mm) * glass output per day * density (kg / m³) * 1000 000m3;

[0083] The amount of original glass loss pulled in = the amount of original glass pulled in - the amount of finished glass pulled in.

[0084] The above parameters, average thickness, original plate width, original plate speed, and daily production of finished glass are obtained through the measurement process of this system. There is a plate dropper at the rear of this system. When the thickness detection exceeds the standard, the plate will be dropped by the plate dropper, and the rest will continue to move on the assembly line. There are three sensors designed at the rear of the plate dropper to count the glass produced in a day; the original glass speed is obtained by measuring the speed of the rotating wheel through an encoder installed on the roller of the assembly line. The length and width of the remaining finished glass are known parameters and are obtained according to the user's settings. This solution can quickly calculate the original glass pulling amount through the thickness, original plate width, original plate speed, and average thickness obtained in the measurement process. At the same time, the finished product pulling amount can be calculated in combination with some parameters entered by the user for process analysis, etc., without the need for the user to perform additional calculations.

[0085] After the measurement starts, each measuring head is started, and the control unit 2 controls each measuring head to obtain multi-point and single-point multiple-time measurement data for the glass to be measured moving in the length direction according to the measurement parameters;

[0086] The processing unit 3 processes the measurement data, receives multiple measurement data at each measurement time point, removes abnormal data and takes the average value to obtain the measurement result of the corresponding measuring head 11 at the corresponding measurement time point; according to the embossing structure and depth of the current glass to be measured, the measurement result of each measuring head 11 is corrected using the corresponding channel offset;

[0087] According to the corrected measurement results, it is judged in real time whether the glass thickness exceeds the thickness range. If so, an alarm is issued. If not, it is stored in the corresponding database and updated at the same time. Figure 4 The interface shown is OK.

[0088] Automatic or controlled board width measurement during or before or after thickness measurement:

[0089] Control the two outermost measuring heads 11 to move slowly outwards respectively, and record real-time measurement data;

[0090] The time point when the real-time measurement data starts to be greater than the set threshold is recorded to obtain the movement time. If it is greater than the set value, it means that the measuring head has exceeded the boundary of the glass to be measured. The set threshold is set by technicians in this field according to actual conditions and is limited here.

[0091] Calculate the width of the glass to be measured according to the moving speed, moving time and starting position of the measuring head 11:

[0092] W=L1+L2+L3;

[0093] L3 is the distance between the starting positions of the two outermost measuring heads 11, in this embodiment, that is, the distance between the starting positions of the first measuring head 111 and the fifth measuring head 115, which is determined according to the recipe parameters used;

[0094] L1=v1*t1;

[0095] L2=v2*t2;

[0096] v1 represents the moving speed of the first measuring head 111, and v2 represents the moving speed of the fifth measuring head 115;

[0097] t1 represents the moving time of the first measuring head 111, which is the length of time from the start of movement of the first measuring head 111 to the start of real-time measurement data being greater than a set threshold. For example, timing starts when the first measuring head 111 starts to move, and during the movement, measurement data is received in real time. When the measurement data is greater than the set threshold for the first time, timing is stopped, and the timing time is the moving time. The other measuring head is similar.

[0098] t2 represents the moving time of the fifth measuring head 115, which is the time length from when the fifth measuring head starts to move to when the real-time measurement data starts to be greater than the set threshold.

[0099] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0100] Although the present invention uses the terms such as measuring unit 1, measuring head 11, first measuring head 111, second measuring head 112, third measuring head 113, fourth measuring head 114, fifth measuring head 115, motion module 12, sliding belt 121, driving motor 122, limit sensor 123, wire groove track 124, wire groove 125, control unit 2, processing unit 3, backstage system 4, glass production line roller 5, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A multi-point online detection method for glass thickness, characterized in that: The method includes: According to the measurement parameters, a plurality of measuring heads (11) arranged in the width direction of the glass to be measured are controlled to obtain multi-point and single-point multiple-times measurement data for the glass to be measured moving in the length direction, wherein the measuring heads (11) use spectral confocal sensors; Processing the measurement data to obtain the measurement results at each time point; Carry out glass thickness detection based on the processed measurement results; Controlling the two outermost measuring heads (11) to move slowly outwards respectively, and recording real-time measurement data; Record the time point when the real-time measurement data starts to be greater than the set threshold to obtain the movement time; Calculating the width of the glass to be measured according to the moving speed, moving time and starting position of the measuring head (11); Glass thickness detection method is: Receiving a plurality of measurement data at each measurement time point, removing abnormal data and taking an average value to obtain a measurement result of a corresponding measurement head (11) at the corresponding measurement time point; According to the embossing structure and depth of the glass to be measured, the measurement results of each measuring head (11) are corrected using the corresponding channel offset; Determine in real time whether the glass thickness exceeds the thickness range based on the calibrated measurement results; The glass width is calculated as: W=L1+L2+L3; L3 is the distance value between the starting positions of the two outermost measuring heads (11); L1=v1*t1; L2=v2*t2; v1 represents the moving speed of one of the outermost measuring heads (11), and v2 represents the moving speed of the other outermost measuring head (11); t1 represents the movement time of one of the outermost measuring heads (11); t2 represents the movement time of the other outermost measuring head (11).

2. A multi-point online glass thickness detection system, characterized in that: Used to execute the multi-point online detection method of glass thickness as claimed in claim 1, comprising a measuring unit (1), a control unit (2), a processing unit (3) and a background system (4); A measuring unit (1) comprising a plurality of measuring heads (11) arranged along the width direction of the glass to be measured on the production line, wherein the two outermost measuring heads (11) are mounted on a motion module (12) for controlling the corresponding measuring heads (11) to move in a direction parallel to the width of the glass to be measured; A control unit (2) for controlling each measuring head (11) to acquire measurement data and controlling the movement of the motion module (12) according to measurement parameters set by the background system (4); A processing unit (3) is used to receive and process the measurement data acquired by the measuring head (11), and upload the processed measurement results to the background system (4); A backend system (4) is used for allowing the user to set measurement parameters and analyzing the thickness and / or width of the glass to be measured based on the received data; The connecting line of the two outermost measuring heads (11) of the measuring unit (1) is parallel to the width direction of the glass to be measured; The motion module (12) comprises a sliding belt (121) extending along the width direction of the glass to be measured, and the corresponding measuring head (11) is arranged on the sliding belt (121) so as to perform linear motion under the drive of the sliding belt (121), and the sliding belt (121) is connected to a driving motor (122) for driving the sliding belt (121) to move, and limit sensors (123) are respectively arranged at both ends of the sliding belt (121), and the limit sensors (123) and the driving motor (122) are both connected to the control unit (2); The motion module (12) further comprises a wire groove track (124) located on an adjacent surface of the sliding belt (121) and extending along the extending direction of the sliding belt (121), a wire groove (125) being laid in the wire groove track (124), and the wire groove (125) being a chain-like structure composed of a plurality of wire groove blocks hinged at the head and tail; One end of the wire slot (125) is fixed on the wire slot track (124), and the other end is connected to the measuring head (11) located on the sliding belt (121) so as to move along with the movement of the measuring head (11).

3. The glass thickness multi-point online detection system according to claim 2 is characterized in that: The connecting line of the multiple measuring heads (11) of the measuring unit (1) forms a straight line, and the straight line is parallel to the width direction of the glass to be measured.

4. The glass thickness multi-point online detection system according to claim 2, characterized in that: The plurality of measuring heads (11) of the measuring unit (1) are installed above the glass production line roller (5) and are used to perform online detection on the glass to be tested that is transported by the glass production line roller (5); The plurality of measuring heads (11) are at the same height relative to the glass production line roller (5).

5. The glass thickness multi-point online detection system according to claim 2, characterized in that: The measuring unit (1) comprises five measuring heads (11), which are respectively a first measuring head (111), a second measuring head (112), a third measuring head (113), a fourth measuring head (114), and a fifth measuring head (115) from one end to the other end in the width direction of the glass to be measured; The first measuring head (111) and the fifth measuring head (115) are mounted on the motion module (12).

6. The glass thickness multi-point online detection system according to claim 2, characterized in that: The measurement parameters include measurement interval and number of measurement points; The control unit (2) controls each measuring head (11) to obtain a plurality of measurement data at each measurement time point according to the measurement interval; The processing unit (3) receives a plurality of measurement data at each measurement time point, removes abnormal data and takes an average value to obtain a measurement result of the corresponding measurement head (11) at the corresponding measurement time point; The measurement parameters also include thickness range; The background system (4) records the measurement result of each measuring head (11) at each measurement time point. When the measurement result of any measuring head (11) exceeds the thickness range, an over-limit alarm is triggered and the corresponding data is highlighted.

7. The multi-point online glass thickness detection system according to claim 6, characterized in that: The processing unit (3) stores a channel offset group set for various embossing structures and depths; The processing unit (3) is used to determine a channel offset group according to the embossing structure and depth of the glass to be tested, and to correct the measurement results of each measuring head (11) using the corresponding channel offset and upload them to the background system (4).

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