Flatness detection device

Abstract

The utility model discloses a flatness detection device, which belongs to the technical field of detection equipment and comprises a workbench, a reference plane is arranged on the workbench, a mounting seat is arranged on the reference plane, a workpiece to be detected is mounted on the mounting seat, and a plurality of detection points are arranged on the workpiece to be detected; the shooting assembly comprises a plurality of laser displacement sensors which are matched with the detection points and are obliquely arranged, and the laser displacement sensors are installed on the reference plane on one side of the detection points to obtain displacement distance data; the transmission assembly is used for connecting a plurality of laser displacement sensors in parallel and then is connected with a 485-to-usb assembly; the calibration assembly comprises a first gauge block group which is matched with the camera shooting assembly to complete first calibration and a second gauge block group which is matched with the camera shooting assembly to complete second calibration; and the processing assembly comprises an engineering computer, and the 485-to-usb assembly is connected with the engineering computer to transmit data of the laser displacement sensor to the engineering computer.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a flatness detection device. Background Art

[0002] In the manufacturing industry, flatness detection is an important evaluation standard for the flatness of a surface, especially for parts and products in the field of precision manufacturing, where flatness is directly related to the quality and performance of the product. However, traditional flatness detection equipment currently has problems such as low accuracy and complex operation. At the same time, existing flatness detection equipment often performs detection in the vertical direction, so the detection equipment needs to be adjusted for each detection, which greatly affects the detection efficiency. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a flatness detection device, which adopts a laser displacement sensor in conjunction with a corresponding first gauge block and a second gauge block, calculates the inclination angle using trigonometric functions, and further uses the calculated inclination angle to accurately calculate the height of each detection point of the workpiece to be detected, and uses multiple laser displacement sensors to fit the standard plane, thereby overcoming the defects of the existing flatness detection device such as low accuracy, and has the advantages of easy disassembly and assembly, and easy detection.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A flatness detection device, comprising:

[0006] A workbench, wherein a reference plane is provided on the workbench, a mounting seat is provided on the reference plane, a workpiece to be inspected is mounted on the mounting seat, and a plurality of inspection points are provided on the workpiece to be inspected;

[0007] An acquisition component, comprising a plurality of laser displacement sensors arranged obliquely to match the detection point, wherein the laser displacement sensors are installed on the reference plane on one side of the detection point to acquire displacement distance data;

[0008] Transmission component, which connects several laser displacement sensors in parallel and then connects them to a 485 to USB component;

[0009] The calibration assembly includes a first gauge block group that cooperates with the camera assembly to complete a first calibration and a second gauge block group that cooperates with the camera assembly to complete a second calibration;

[0010] The processing component includes an engineering computer. The 485 to USB component is connected to the engineering computer to transmit the data of the laser displacement sensor to the engineering computer.

[0011] Preferably, the first gauge block group is provided with a first gauge block corresponding to the laser displacement sensor, and the second gauge block group is provided with a second gauge block corresponding to the laser displacement sensor, the first gauge block is placed on the reference plane, and the second gauge block corresponding to the same laser displacement sensor is placed on the first gauge block, and the positions of the first gauge block and the second gauge block are moved to respectively achieve coordination with the laser displacement sensor to achieve the purpose of determining the inclination angle with the laser displacement sensor.

[0012] Preferably, the number of the laser displacement sensors is 3n, where n is an integer not less than 1.

[0013] Preferably, the laser displacement sensor is fixedly mounted on an adjustable bracket, the adjustable bracket includes a fixed seat fixedly mounted on the reference plane, the fixed seat is located on one side of the detection point, a column is fixedly mounted on the fixed seat, a first movable seat that can be moved freely is mounted on the column, a locking bolt that matches the column is mounted on one end of the first movable seat, a cross bar is fixedly mounted on the other end of the first movable seat, a second movable seat that can be moved freely is mounted on the cross bar, a locking bolt that matches the cross bar is mounted on the second movable seat, and the laser displacement sensor is fixedly mounted on the second movable seat.

[0014] Preferably, the cross bar is perpendicular to the column.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model adopts a laser displacement sensor in conjunction with the corresponding first gauge block and second gauge block, uses trigonometric functions to calculate the inclination angle, and further uses the calculated inclination angle to accurately calculate the height of each detection point of the workpiece to be detected. Multiple laser displacement sensors are used to fit the standard plane, which overcomes the defects of the existing flatness detection device such as low accuracy, and has the advantages of easy disassembly and assembly, easy detection, etc.

[0017] 2. The adjustable detection mechanism in the utility model is located on one side of the detection point. The laser displacement sensor is slightly tilted so that the adjustable detection mechanism can be installed at a distance from the workpiece to be detected. This can effectively avoid interference between the workpiece to be detected and the adjustable detection mechanism during the disassembly and assembly process. The adjustable detection mechanism can complete the detection of different workpieces of the same model after one installation, which can effectively improve the detection efficiency.

[0018] 3. In the utility model, by adjusting the position and angle of the first movable seat on the column, the height of the laser displacement sensor and the deflection angle of the crossbar can be controlled. By adjusting the position and angle of the second movable seat on the crossbar, the position of the laser displacement sensor in the horizontal plane and the deflection angle of the laser displacement sensor can be controlled, so that the laser displacement sensor can meet the detection requirements of different types of workpieces to be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the overall structure of a flatness detection device.

[0020] In the figure: 1-workbench, 2-reference plane, 3-mounting seat, 4-workpiece to be detected, 5-laser displacement sensor, 6-first gauge block, 7-second gauge block, 8-adjustable bracket. DETAILED DESCRIPTION

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 The flatness detection device shown in the figure comprises: a workbench 1, on which a reference plane 2 is provided, on which a mounting seat 3 is provided, on which a workpiece 4 to be detected is mounted, and on which a plurality of detection points are provided; an acquisition component, comprising a plurality of laser displacement sensors 5 arranged obliquely to match the detection points, the laser displacement sensors 5 being installed on the reference plane 2 on one side of the detection points to obtain displacement distance data, and by using a slightly inclined design of the laser displacement sensor 5, the adjustable detection mechanism can be installed at a distance from the workpiece 4 to be detected, which can effectively Avoid interference between the workpiece 4 to be detected and the adjustable detection mechanism during the disassembly and assembly process. The adjustable detection mechanism can be installed once to complete the detection of different workpieces of the same model, which can effectively improve the detection efficiency; a transmission component, after connecting several laser displacement sensors 5 in parallel, is connected with a 485-to-USB component; a calibration component, including a first gauge block group that cooperates with the camera component to complete the first calibration and a second gauge block group that cooperates with the camera component to complete the second calibration; a processing component, including an engineering computer, and the 485-to-USB component is connected to the engineering computer to transmit the data of the laser displacement sensor 5 to the engineering computer.

[0023] The first gauge block group is provided with a first gauge block 6 corresponding to the laser displacement sensor 5, and the second gauge block group is provided with a second gauge block 7 corresponding to the laser displacement sensor 5. The first gauge block 6 is placed on the reference plane 2, and the second gauge block 7 corresponding to the same laser displacement sensor 5 is placed on the first gauge block 6. The positions of the first gauge block 6 and the second gauge block 7 are moved to respectively achieve the coordination with the laser displacement sensor 5 to achieve the purpose of determining the inclination angle with the laser displacement sensor 5. The laser displacement sensor 5 is coordinated with the corresponding first gauge block 6 and the second gauge block 7. Since the inclination angle of the laser displacement sensor 5 calibrated twice remains unchanged, the distances from the laser displacement sensor 5 to the first gauge block 6 and the second gauge block 7 are known, and the heights of the first gauge block 6 and the second gauge block 7 are known. The trigonometric function can be used to calculate the inclination angle of the laser displacement sensor 5, and the calculated inclination angle is further used to accurately calculate the height of each detection point of the workpiece 4 to be detected. Multiple laser displacement sensors 5 are used to fit the standard plane, which overcomes the defects of low accuracy of the existing flatness detection device and has the advantages of easy disassembly and assembly, easy detection, etc.

[0024] The laser displacement sensors 5 are provided with 3n pieces, where n is an integer not less than 1. Based on the principle of determining a plane by three points, the use of three or multiples of three laser displacement sensors 5 can effectively improve the accuracy of flatness detection.

[0025] The laser displacement sensor 5 is fixedly mounted on an adjustable bracket 8, and the adjustable bracket 8 includes a fixed seat fixedly mounted on the reference plane 2, and the fixed seat is located on one side of the detection point. A column is fixedly mounted on the fixed seat, and a first movable seat that can be moved freely is mounted on the column. A locking bolt that matches the column is mounted on one end of the first movable seat, and a cross bar is fixedly mounted on the other end of the first movable seat, and the cross bar is perpendicular to the column. A second movable seat that can be moved freely is mounted on the cross bar, and a locking bolt that matches the cross bar is mounted on the second movable seat. The laser displacement sensor 5 is fixedly mounted on the second movable seat. By adjusting the position and angle of the first movable seat on the column, the height of the laser displacement sensor 5 and the deflection angle of the cross bar can be controlled. By adjusting the position and angle of the second movable seat on the cross bar, the position of the laser displacement sensor 5 in the horizontal plane and the deflection angle of the laser displacement sensor 5 can be controlled, so that the laser displacement sensor 5 can meet the detection requirements of different types of workpieces 4 to be detected.

[0026] The utility model adopts a zeroing algorithm when working, and realizes the zeroing of the laser displacement sensor 5 by cyclically sending preset zeroing instructions of 12 laser displacement sensors 5 to the transmission component; the calibration algorithm calculates the difference of two displacements through two calibrations, wherein the first calibration is to call the zeroing algorithm, and the second calibration is to read the values ​​of the 12 laser displacement sensors 5 after the calibration component is placed on the workbench in turn, and the angle between the laser and the horizontal plane is calculated by calculating this value and the height value of the calibration component through trigonometric function transformation; the calculation algorithm, after the calibration is completed, the height of each point is obtained according to the previously calculated angle, and a standard plane is fitted through the heights of the 12 points, and a threshold is set by calculating the standard deviation of the difference with the standard plane to determine whether the flatness of the workpiece meets the standard.

[0027] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A flatness detection device, comprising: A workbench, wherein a reference plane is provided on the workbench, a mounting seat is provided on the reference plane, a workpiece to be inspected is mounted on the mounting seat, and a plurality of inspection points are provided on the workpiece to be inspected; An acquisition component, comprising a plurality of laser displacement sensors arranged obliquely to match the detection point, wherein the laser displacement sensors are installed on the reference plane on one side of the detection point to acquire displacement distance data; Transmission component, which connects several laser displacement sensors in parallel and then connects them to a 485 to USB component; The calibration assembly includes a first gauge block group that cooperates with the camera assembly to complete a first calibration and a second gauge block group that cooperates with the camera assembly to complete a second calibration; The processing component includes an engineering computer. The 485 to USB component is connected to the engineering computer to transmit the data of the laser displacement sensor to the engineering computer.

2. A flatness detection device according to claim 1, characterized in that: The first gauge block group is provided with a first gauge block corresponding to the laser displacement sensor, and the second gauge block group is provided with a second gauge block corresponding to the laser displacement sensor. The first gauge block is placed on the reference plane, and the second gauge block corresponding to the same laser displacement sensor is placed on the first gauge block.

3. A flatness detection device according to claim 1, characterized in that: The laser displacement sensors are provided with 3n pieces, where n is an integer not less than 1.

4. A flatness detection device according to claim 3, characterized in that: The laser displacement sensor is fixedly mounted on an adjustable bracket, and the adjustable bracket includes a fixed seat fixedly mounted on the reference plane, the fixed seat is located on one side of the detection point, a column is fixedly mounted on the fixed seat, a first movable seat that can be moved freely is mounted on the column, a locking bolt that matches the column is mounted on one end of the first movable seat, a cross bar is fixedly mounted on the other end of the first movable seat, a second movable seat that can be moved freely is mounted on the cross bar, a locking bolt that matches the cross bar is mounted on the second movable seat, and the laser displacement sensor is fixedly mounted on the second movable seat.

5. A flatness detection device according to claim 4, characterized in that: The cross bar is perpendicular to the column.

Images