A three-dimensional surface height deviation detection device

Abstract

The utility model relates to the field of precision measurement technology, concretely relates to a three -dimensional surface height deviation detection device, the design is fixed with two supports and constitutes stable structure through mounting plate, and utilizes manual displacement platform as telescopic piece to realize the fine pitch and height adjustment of line laser measurement camera, avoids the damage of contact type measurement to the surface, encoder and transmission line driving wheel are coaxial installation, and the trigger signal driving line laser measurement camera is generated and synchronizes with the line sweep collection of speed in real time, eliminates mechanical error accumulation and promotes measurement efficiency, line laser measurement camera adopts non - contact optical detection, and the three - time polynomial least square curve fitting processing of acquisition data is combined to host computer, effectively suppresses optical error interference, solves the optical distortion problem of measurement, meanwhile, the device adapts to variable -speed transmission working condition, is compatible with large -size plane and micro -curved surface detection, breaks through the limitation that the measurement range of scanning microscope type is small and environmental adaptability is poor.

Description

Technical Field

[0001] This utility model relates to the field of precision measurement technology, and in particular to a three-dimensional surface height deviation detection device. Background Technology

[0002] In industrial production, accurate measurement of the surface morphology of flat parts is crucial. Currently used stylus-based, optical, and scanning microscopy (SMS) measurement methods meet the basic surface measurement needs of industrial production to varying degrees. Stylus-based methods, by directly contacting the part surface, can accurately obtain surface height information, providing important data for part processing and quality assessment. Optical methods, utilizing optical principles, offer the advantage of non-contact measurement, avoiding potential damage to the part surface caused by stylus-based methods, and are widely used in applications with high surface quality requirements. SMS methods provide high-resolution surface morphology images, which are of great significance for the observation and analysis of microstructures.

[0003] However, the commonly used stylus measurement method suffers from mechanical errors and error accumulation, resulting in low measurement efficiency and easy damage to the surface; optical measurement is susceptible to interference from various error sources, leading to distorted measurement results; and scanning microscope measurement has limitations such as small measurement range and poor environmental adaptability. Utility Model Content

[0004] The purpose of this invention is to provide a three-dimensional surface height deviation detection device, which aims to solve the technical problems of the commonly used stylus measurement method in the prior art, which has mechanical errors and error accumulation, low measurement efficiency and easy damage to the surface; optical measurement is easily affected by various error sources, resulting in distorted measurement results; and scanning microscope measurement has limitations such as small range and poor environmental adaptability.

[0005] To achieve the above objectives, this utility model employs a three-dimensional surface height deviation detection device, comprising a mounting plate, two brackets, an encoder, a transmission line, and a host computer. The mounting plate is equipped with a telescopic component, and a line laser measuring camera is mounted at the output end of the telescopic component. The mounting plate is fixedly connected to the corresponding brackets via fixing components and is located on the two brackets. The encoder is mounted at the drive wheel of the transmission line, and the encoder is coaxially mounted with the drive wheel. Both the encoder and the host computer are connected to the line laser measuring camera via wires. The transmission line is positioned directly below the line laser measuring camera.

[0006] The telescopic component is a manual displacement platform, which is fixedly connected to the mounting plate and located on the mounting plate.

[0007] The fixing component consists of two fixing bolts, and the fixing bolts are threadedly connected to the corresponding bracket.

[0008] This invention discloses a three-dimensional surface height deviation detection device. The design utilizes a mounting plate and two brackets to form a stable structure, and a manual displacement stage as a telescopic component to achieve precise pitch and height adjustment of the line laser measuring camera, avoiding surface damage from contact measurements. The encoder is coaxially mounted with the transmission line drive wheel, generating a trigger signal synchronized with the belt speed in real time to drive the line laser measuring camera for line scanning acquisition, eliminating mechanical error accumulation and improving measurement efficiency. The line laser measuring camera employs non-contact optical detection, and combined with the upper computer's cubic polynomial least squares curve fitting processing of the acquired data, it effectively suppresses optical error interference and solves the problem of optical measurement distortion. Furthermore, this device is adaptable to variable speed transmission conditions and compatible with the detection of large-size planes and micro-curved surfaces, overcoming the limitations of scanning microscope-type measurements in terms of small range and poor environmental adaptability. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the three-dimensional surface height deviation detection device of this utility model.

[0011] Figure 2 This is a side view of the two supports and the mounting plate in the three-dimensional surface height deviation detection device of this utility model.

[0012] Figure 3 This is a top view of the two supports and the mounting plate in the three-dimensional surface height deviation detection device of this utility model.

[0013] Figure 4 This is a flowchart of the three-dimensional surface height deviation detection device of this utility model.

[0014] 1-Mounting plate, 2-Bracket, 3-Encoder, 4-Transmission line, 5-Host computer, 6-Line laser measuring camera, 7-Manual displacement stage, 8-Fixing bolts. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0016] Please see Figures 1 to 4 This utility model provides a three-dimensional surface height deviation detection device, including a mounting plate 1, two brackets 2, an encoder 3, a transmission line 4, and a host computer 5. The mounting plate 1 is provided with a telescopic component, and a line laser measuring camera 6 is provided at the output end of the telescopic component. The mounting plate 1 is fixedly connected to the corresponding brackets 2 by a fixing component and is located on the two brackets 2. The encoder 3 is located at the drive wheel of the transmission line 4, and the encoder 3 is coaxially mounted with the drive wheel. The encoder 3 and the host computer 5 are both connected to the line laser measuring camera 6 by wires. The transmission line 4 is located directly below the line laser measuring camera 6.

[0017] In this embodiment, the mounting plate 1 and the two brackets 2 form a stable support structure, and the telescopic component is used to achieve precise position adjustment of the line laser measuring camera 6, enabling it to acquire three-dimensional surface data at high speed in a non-contact manner. The encoder 3 is coaxially mounted with the drive wheel of the transmission line 4, generating a trigger signal synchronized with the belt speed in real time to drive the line laser measuring camera 6 to perform dynamic line scanning, avoiding the mechanical error accumulation and surface damage problems of traditional stylus-type measurement. The host computer 5 processes the data through a cubic polynomial least squares curve fitting algorithm, effectively suppressing optical error interference and solving the defect of easy distortion in optical measurement. At the same time, the device supports online detection under variable speed transmission conditions, is compatible with the measurement of large-size planes and micro-curved surfaces, and overcomes the limitations of scanning microscope measurement in terms of small range and poor environmental adaptability, significantly improving detection efficiency and adaptability.

[0018] Furthermore, the telescopic component is a manual displacement stage 7, and the manual displacement stage 7 is fixedly connected to the mounting plate 1 and located on the mounting plate 1.

[0019] In this embodiment, the pitch and height fine-tuning of the line laser measuring camera 6 is achieved by manual drive, and the manual displacement stage 7 is a high-precision directional adjustment displacement stage.

[0020] Furthermore, the fixing component consists of two fixing bolts 8, and the fixing bolts 8 are threadedly connected to the corresponding bracket 2.

[0021] In this embodiment, the detachable design enables a stable assembly of the mounting plate 1 and the bracket 2, while also facilitating the rapid disassembly and assembly of the testing system and its integration into the production line.

[0022] In this invention, the mounting plate 1 is fixed by the two brackets 2, and the mounting plate 1 is securely locked to the brackets 2 by the fixing bolts 8. Then, the height and angle of the line laser measuring camera 6 are adjusted by the manual displacement stage 7 (telescopic component) so that it is aligned with the surface of the part to be measured located directly below the transmission line 4. After the transmission line 4 is started, the encoder 3 rotates synchronously with the drive wheel, generates trigger pulses that match the belt speed in real time and transmits them to the line laser measuring camera 6, driving it to continuously collect three-dimensional contour data of the part surface in line frequency mode. The collected data is transmitted to the host computer 5 through wires, and the host computer 5 performs cubic polynomial least squares curve fitting processing: first, the single line data is initially fitted and outliers are filtered out, then a precise reference curve is generated through a second fitting, and finally the height residual of each sampling point is calculated to obtain the surface height deviation parameter. The entire detection process does not require machine shutdown and can achieve fully automated, high-precision, non-contact online monitoring of three-dimensional surface quality under variable speed transmission conditions.

[0023] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A three-dimensional surface height deviation detection device, characterized in that, The device includes a mounting plate, two brackets, an encoder, a transmission line, and a host computer. The mounting plate is equipped with a telescopic component, and a line laser measuring camera is mounted at the output end of the telescopic component. The mounting plate is fixedly connected to the corresponding brackets via fasteners and is located on the two brackets. The encoder is mounted at the drive wheel of the transmission line and is coaxially mounted with the drive wheel. Both the encoder and the host computer are connected to the line laser measuring camera via wires. The transmission line is located directly below the line laser measuring camera.

2. The three-dimensional surface height deviation detection device as described in claim 1, characterized in that, The telescopic component is a manual displacement platform, which is fixedly connected to the mounting plate and located on the mounting plate.

3. The three-dimensional surface height deviation detection device as described in claim 2, characterized in that, The fastener consists of two fixing bolts, and the fixing bolts are threadedly connected to the corresponding bracket.

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