Dual line laser thickness measurement system

Abstract

The application relates to the technical field of thickness detection, and discloses a double-line laser thickness detection system, which has the technical scheme as follows: a platform and a terminal are arranged, a support, a moving mechanism and a double-line laser detection module are arranged on the platform, a to-be-detected piece is placed on the support, the double-line laser detection module comprises a frame body and laser sensors oppositely arranged at two ends of the frame body, the to-be-detected piece is detected in thickness by the laser sensors, the moving mechanism drives the laser sensors to move in two directions of X and Y axes, the to-be-detected piece is detected in thickness by the laser sensors, a model unit displays a to-be-detected model on the terminal through thickness data, and the thickness data is corrected by a correction unit, including inclination correction, height correction and jump compensation, so that the accuracy of the thickness data is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the thickness detection technical field, more particularly to a double-line laser thickness measurement system. BACKGROUND

[0002] After the plate is processed, the thickness of the plate needs to be detected to determine whether it meets the thickness requirement and whether it is a qualified product. After the plate is sprayed, the thickness of the coating on the surface of the plate also needs to be detected to determine whether the coating thickness is qualified.

[0003] The conventional high-precision ruler is used for measurement, and the measurement efficiency is low, and there is a placement error of the detected piece. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a double-line laser thickness measurement system for reducing detection errors.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a double-line laser thickness measurement system, comprising a platform and a terminal, a support, a moving mechanism and a double laser measurement module are arranged on the platform, the detected piece is placed on the support, the double laser measurement module comprises a frame body and laser sensors oppositely arranged at both ends of the frame body, the moving mechanism is used to drive the frame body to move in the horizontal direction, the terminal is provided with a data processing module and a display module, the laser sensors measure the distance between the detected piece and send detection signals, the data processing module comprises a model unit and a processing unit, the processing unit calculates the thickness of the detected piece according to the detection signals and generates thickness data of each position, the model unit generates a detected model according to the thickness data and displays it through the display module.

[0006] As a further improvement of the present application, the data processing module further comprises a correction unit, which is used to correct the thickness data.

[0007] As a further improvement of the present application, the correction includes inclination correction and height correction, the correction unit is pre-set with a deviation angle and a deviation height, the inclination correction corrects the thickness data in the X-axis direction through the deviation angle, and the height correction corrects the thickness data in the Z-axis direction through the deviation height.

[0008] As a further improvement of the present application, the correction also includes jump compensation, the correction unit is pre-set with a jump bending value, and the jump compensation corrects the thickness data for the deviation caused by the deformation of the moving mechanism through the jump bending value.

[0009] As a further improvement of the present application, the correcting unit defines a measurement center according to the thickness data, and when the tilt correction is performed, the model to be detected formed by the thickness data is rotated with the measurement center as the rotation center and by a preset angle.

[0010] As a further improvement of the present application, there is a difference between the preset angle and the deviation angle, and after rotating by the preset angle, the model to be detected is rotated by one-half of the difference.

[0011] As a further improvement of the present application, the processing unit converts the detection signal into detection data, the detection data including invalid values, dead angle values and valid values, the processing unit calculates the thickness data according to the valid values, the invalid values representing data that cannot be measured due to insufficient light, and the dead angle values representing data that cannot be measured due to the shadow of the model to be detected.

[0012] As a further improvement of the present application, the material of the frame body is marble.

[0013] As a further improvement of the present application, the frame body is provided with a temperature detection module for detecting the temperature of the frame body in real time, and the correcting unit is provided with a temperature compensation table, the temperature compensation table being provided with temperature values and compensation data corresponding to the temperature data, and the correcting unit taking the current temperature as an index to execute the compensation data corresponding to the temperature values.

[0014] As a further improvement of the present application, the moving mechanism includes a first sliding rail and a first motor, the output end of the first motor being fixedly connected with a first screw rod, the first screw rod being rotatably connected with the first sliding rail, the first screw rod being threadedly connected with a second sliding rail, the second sliding rail being provided with a second motor, the second motor being drivingly connected with a second screw rod, the second screw rod being rotatably connected with the second sliding rail, and the frame body being slidingly connected with the second sliding rail and threadedly connected with the second screw rod.

[0015] The present application has the following advantages: in the present application, the laser sensor is used to detect the thickness of the model to be detected, the moving mechanism drives the laser sensor to move in the X-axis and Y-axis directions, the laser sensor detects the thickness of the model to be detected as a whole, the model unit displays the model to be detected on the terminal according to the thickness data, and the correcting unit corrects the thickness data, including tilt correction, height correction and bounce compensation, thereby improving the accuracy of the thickness data. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structural schematic view of the present application.

[0017] Reference numerals: 1, platform; 2, support; 3, moving mechanism; 4, double laser measurement module; 41, frame body; 42, laser sensor. DETAILED DESCRIPTION

[0018] The application will be further described in detail below in conjunction with the accompanying drawings and examples. Identical parts are denoted by identical reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular part.

[0019] Reference Figure 1As shown, the double-line laser thickness measuring system of the embodiment includes a platform 1 and a terminal, the terminal is a computer terminal, the platform 1 is provided with a support 2, a moving mechanism 3 and a double laser measuring module 4, the support 2 is placed with a to-be-detected piece, the to-be-detected piece is mostly a plate piece, the plate piece is placed on the support 2, the moving mechanism 3 drives the frame body 41 to move, the to-be-detected piece is located between the two laser sensors 42, the two laser sensors 42 scan the to-be-detected piece to detect the thickness of each position of the to-be-detected piece, the double laser measuring module 4 includes the frame body 41 and the laser sensors 42 oppositely arranged at both ends of the frame body 41, the material of the frame body 41 is marble. The marble is in a U shape, the marble has the characteristics of not deforming, after long-term natural aging, the organization structure is uniform, the linear expansion coefficient is extremely small, the internal stress completely disappears, the interval and the angle between the two laser sensors 42 are prevented from changing due to temperature change, the moving mechanism 3 is used for driving the frame body 41 to move in the horizontal direction, the movement in the horizontal direction includes movement in the X-axis and Y-axis directions, the moving mechanism 3 includes a first sliding rail and a first motor, the output end of the first motor is fixedly connected with a first screw rod, the first screw rod is rotationally connected with the first sliding rail, a second sliding rail is threadedly connected to the first screw rod, a second motor is arranged on the second sliding rail, a second screw rod is drivingly connected to the second motor, the second screw rod is rotationally connected with the second sliding rail, the frame body 41 is slidingly connected to the second sliding rail and is threadedly connected with the second screw rod, the first motor drives the first screw rod to rotate, so that the second sliding rail moves on the first sliding rail in the Y-axis direction, the second motor drives the second screw rod to rotate through a transmission belt, so that the frame body 41 moves on the second sliding rail in the X-axis direction, a data processing module and a display module are arranged in the terminal, the laser sensors 42 measure the distance between the to-be-detected piece and send detection signals, the data processing module includes a model unit and a processing unit, the processing unit is a central processing unit, the processing unit calculates the thickness of the to-be-detected piece according to the detection signals and generates thickness data of each position, according to the thickness data, the profiles of the upper surface and the lower surface of the to-be-detected model can be formed, the model unit generates the to-be-detected model according to the thickness data and displays the to-be-detected model through the display module, in the process of calculating the to-be-detected model, the dead angle of the to-be-detected model is supplemented according to the dead angle value and is virtualized, the model of the to-be-detected piece is displayed on the computer terminal screen, which is convenient for detection personnel to more intuitively observe the model and saves modeling time. Before the laser sensors 42 work, the light needs to be adjusted, the two laser sensors 42 are respectively installed on a six-axis adjustable fine adjustment mechanism, so that the laser sensors 42 can be finely adjusted in six directions of up, down, left, right and front and back, the laser sensors 42 are fixed first, the laser is turned on, and a semi-transparent card is placed between the two lasers, the relative positions of the two laser lines can be observed, so that the two laser lines are parallel and coincide.

[0020] Referring to Figure 1As shown, the data processing module further comprises a correction unit, the correction unit is used for correcting the thickness data, preventing the thickness data from deviation, ensuring the accuracy of the thickness data, and making the to-be-detected model closer to the to-be-detected piece. The correction includes inclination correction and height correction, and the correction unit is pre-provided with a deviation angle and a deviation height. The inclination correction corrects the thickness data in the X-axis direction through the deviation angle, and the height correction corrects the thickness data in the Z-axis direction through the deviation height. Before measurement, the fixed plate with a calibrated thickness is measured first, the thickness of the fixed plate is set to 1mm, and the detected value is compensated when the thickness of the fixed plate is measured, so that the final thickness data is 1mm. According to the difference between the detected value and 1mm, the deviation angle and the deviation height are determined to compensate other thickness data.

[0021] Referring to Figure 1 As shown, the correction further includes run-out compensation, and the correction unit is pre-provided with a run-out bending value. The run-out compensation corrects the deviation of the thickness data caused by the deformation of the moving mechanism 3 through the run-out bending value. Before the run-out bending value is pre-set, the long flat crystal is measured by the laser sensor 42, and the flatness of the long flat crystal is 0.1um. However, the generated measurement curve will have very slight bending changes, which are mainly caused by the bending deformation of the moving mechanism 3. The run-out bending value is generated for the deformation to compensate the influence caused by the bending deformation of the moving mechanism 3.

[0022] Referring to Figure 1 As shown, the correction unit defines a measurement center according to the thickness data, and the measurement center is the midpoint of the detection position of the laser sensor 42 from the head to the tail. When the inclination correction is performed, the to-be-detected model formed by the current thickness data is rotated around the measurement center as the rotation center, and the to-be-detected model is adjusted to the right position. The range of the deviation angle is from negative 45 degrees to positive 45 degrees.

[0023] There is a difference between the pre-set angle and the deviation angle. After rotating a pre-set angle, the other rotation angle is one-half of the difference, which reduces the correction error. After rotating one-half of the difference, the rotation angle can be continued to be one-quarter of the difference. Each rotation is one-half of the previous rotation angle, so that the total rotation angle is infinitely close to a deviation angle.

[0024] The processing unit converts the detection signal into detection data, and the detection data includes invalid values, dead angle values and valid values. The processing unit calculates the thickness data according to the valid values, the invalid values represent the data that cannot be measured due to insufficient light, and the dead angle values represent the data that cannot be measured due to the shadow of the to-be-detected piece. The dead angle values and the invalid values are distinguished to prevent the dead angle values and the invalid values from affecting the valid values, and the dead angle values can be virtualized.

[0025] The temperature detection module is arranged on the frame body 41 and is used for detecting the temperature of the frame body 41 in real time. A temperature compensation table is prearranged in the correction unit. The temperature compensation table is prearranged with temperature values and compensation data corresponding to the temperature data. The correction unit takes the current temperature as an index and executes the compensation data under the corresponding temperature value. Due to the change of temperature and thermal expansion and contraction, the first slide rail and the second slide rail in the moving mechanism 3 will be deformed, and the marble may be slightly deformed. Through the detection of the temperature, different compensation data are executed at different temperatures to compensate the thickness data, so that the result is more accurate. The current environmental temperature can be known through the temperature detection module, so that the environmental temperature is controlled to be between 20 degrees and 21 degrees.

[0026] Working principle: the to-be-detected piece is placed on the support 2, the laser sensor 42 is started, the first motor drives the first screw rod to rotate, the second slide rail moves on the first slide rail in the Y-axis direction, the second motor drives the second screw rod to rotate through the transmission belt, the frame body 41 moves on the second slide rail in the X-axis direction, and the laser sensor 42 moves with the frame body 41 to detect the thickness of the to-be-detected piece.

[0027] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A dual-line laser thickness measurement system, comprising a platform (1) and a terminal, wherein the platform (1) is provided with a support (2), a moving mechanism (3) and a dual-laser measurement module (4), and the part to be inspected is placed on the support (2), characterized in that: The double laser measuring module (4) comprises a frame body (41) and laser sensors (42) oppositely arranged at both ends of the frame body (41), the moving mechanism (3) is used for moving the frame body (41) in the horizontal direction, a data processing module and a display module are arranged in the terminal, the laser sensors (42) measure the distance between the to-be-detected member and send detection signals, the data processing module comprises a model unit and a processing unit, the processing unit calculates the thickness of the to-be-detected member according to the detection signals and generates thickness data of each position, and the model unit generates a to-be-detected model according to the thickness data and displays the to-be-detected model through the display module; The data processing module further comprises a correction unit, and the correction unit is used for correcting the thickness data; The correction comprises inclination correction and height correction, the correction unit is pre-provided with a deviation angle and a deviation height, the inclination correction is used for correcting the thickness data in the X-axis direction through the deviation angle, and the height correction is used for correcting the thickness data in the Z-axis direction through the deviation height; The correction further comprises jump compensation, the correction unit is pre-provided with a jump bending value, and the jump compensation is used for correcting the thickness data due to deformation of the moving mechanism (3) through the jump bending value; The correction unit defines a measurement center according to the thickness data, when the inclination correction is performed, the to-be-detected model formed by the thickness data is rotated by a preset angle with the measurement center as the rotation center; There is a difference between the preset angle and the deviation angle, and after rotating by the preset angle, the to-be-detected model is further rotated by one-half of the difference as another rotation angle; The processing unit converts the detection signals into detection data, the detection data comprises invalid values, dead angle values and effective values, the processing unit calculates the thickness data according to the effective values, the invalid values represent data that cannot be measured due to insufficient light quantity, and the dead angle values represent data that cannot be measured due to the shadow of the to-be-detected member; The material of the frame body (41) is marble; A temperature detection module is arranged on the frame body (41) and is used for detecting the temperature of the frame body (41) in real time, the correction unit is pre-provided with a temperature compensation table, the temperature compensation table is pre-provided with temperature values and compensation data corresponding to the temperature data, and the correction unit takes the current temperature as an index to execute the compensation data corresponding to the temperature values.

2. The dual laser thickness gauging system of claim 1, wherein: The moving mechanism (3) comprises a first sliding rail and a first motor, the output end of the first motor is fixedly connected with a first screw rod, the first screw rod is rotationally connected with the first sliding rail, a second sliding rail is threadedly connected to the first screw rod, a second motor is arranged on the second sliding rail, a second screw rod is rotationally connected to the second motor, and the frame body (41) is slidably connected to the second sliding rail and is threadedly connected with the second screw rod.

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