Detection device
By designing the detection ring assembly in the detection device, the problem of position deviation of laser triangulation instrument and CCD lens is solved, and efficient flatness measurement accuracy and consistency are achieved.
Patent Information
- Application Number
- CN202422472433.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-12
AI Technical Summary
During the maintenance, cleaning or measurement of three-dimensional equipment, the positions of the laser triangulation instrument and CCD lens are prone to deviation, resulting in inaccurate measurement of flatness.
A detection device is designed, including a housing and a detection ring assembly. Through the first detection ring and the second detection ring in the detection ring assembly, the plane position offset and angular offset of the laser spot are detected respectively to ensure the position and angle of the laser triangulation meter are accurate.
It improves the detection and confirmation efficiency of the laser triangulation instrument, ensures the accuracy and consistency of measurements, and avoids measurement errors caused by position deviations.
Smart Images
Figure CN223154226U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of flatness testing equipment detection, and particularly to a detection device. Background Art
[0002] Flatness testing has a relatively high demand in PCB testing. Among them, flatness refers to the flatness of the circuit board surface in the vertical direction, that is, the height deviation of the circuit board surface. The commonly used measurement method is the laser triangulation method. During measurement, the CCD lens is used to capture the center of the measurement pad, and the laser triangulation instrument is used to measure the flatness of the pad. There is a certain distance between the centers of the two. Its specific working method is as follows: After the CCD lens grabs the center of the pad (pad), then the CCD lens moves (according to the coordinate difference between the centers of the CCD lens and the laser triangulation instrument), so that the laser triangulation instrument moves to the center position of the pad.
[0003] However, during the maintenance, cleaning or measurement of the three-dimensional device, it is easy to touch the laser triangulation instrument, resulting in the position of the laser being shifted or the position of the CCD lens being deviated, which will cause the height measurement position to be deviated, and then there will be a problem of inaccurate measurement. Summary of the Utility Model
[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application proposes a detection device that can quickly detect and confirm whether the position of the laser triangulation instrument has deviated, and confirm whether the angle of the laser triangulation instrument on both sides is inclined.
[0005] The detection device of the embodiment of this application includes:
[0006] A housing, a centering ring is provided at the top of the housing, an accommodation cavity is provided inside the housing, an opening is provided at the top of the housing, the opening is located inside the centering ring, and an observation window communicating with the accommodation cavity is provided on the side wall of the housing;
[0007] A detection ring assembly, including a first detection ring and a second detection ring concentrically arranged at the bottom of the accommodation cavity, the diameter of the first detection ring is smaller than the diameter of the second detection ring, the second detection ring is higher than the first detection ring, the first detection ring is used to detect the planar position offset of the laser, and the second detection ring is used to detect the laser offset angle.
[0008] According to some embodiments of this application, the diameter of the first detection ring is smaller than the diameter of the opening, and the diameter of the second detection ring is larger than the diameter of the opening.
[0009] In some embodiments of the present application, the side wall of the second detection ring is perpendicular to the bottom of the housing, and the height of the second detection ring is H, satisfying: H > 0.
[0010] In some embodiments of the present application, the material of the second detection ring is a transparent or semi-transparent material.
[0011] In some embodiments of the present application, the diameter of the first detection ring is 10% smaller than the diameter of the opening.
[0012] In some embodiments of the present application, the diameter of the second detection ring is 10% larger than the diameter of the opening.
[0013] In some embodiments of the present application, the inner wall of the housing is provided as a light-absorbing surface so that the light is diffusely reflected after irradiating the inner wall.
[0014] In some embodiments of the present application, the material of the housing is a non-transparent material to prevent external light from entering the accommodation cavity through the side wall of the housing.
[0015] In some embodiments of the present application, the number of the observation windows is one or more. When the number of the observation windows is multiple, the multiple observation windows are circumferentially and spaced apart around the outer wall of the housing.
[0016] In some embodiments of the present application, the diameter of the opening is the same as the diameter of the laser spot so that the spot can irradiate from the opening to the bottom of the accommodation cavity.
[0017] The detection device according to the embodiments of the present application has at least the following beneficial effects: During detection, light enters the accommodation cavity from the opening in the top wall of the housing. By observing the relative position between the laser spot on the bottom wall of the housing and the first detection ring, it can be determined whether the light has shifted; by observing the distance between the laser spot and the second detection ring, it can be determined whether the light has an angular shift. In this way, the detection device according to the embodiments of the present application can quickly detect whether the actual coordinate difference of the laser of the flatness detection device is the same as the set value, and at the same time, it can also observe whether the angle of the laser is tilted through the detection device, which helps to improve the detection and confirmation efficiency of the laser triangulation instrument.
[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings
[0019] The following further describes the present application with reference to the drawings and embodiments, where:
[0020] Figure 1Schematic cross-sectional structure diagram of a detection device according to an embodiment of the present application;
[0021] Figure 2 Schematic top view structure diagram of a detection device according to an embodiment of the present application;
[0022] Figure 3 Schematic structure diagram of the first detection ring and the second detection ring of a detection device according to an embodiment of the present application;
[0023] Figure 4 Schematic three-dimensional structure diagram of a detection device according to an embodiment of the present application;
[0024] Figure 5 Schematic three-dimensional structure diagram of a detection device according to an embodiment of the present application.
[0025] Reference numerals:
[0026] 100, housing; 110, accommodation cavity; 120, alignment ring; 130, opening; 140, top wall; 150, side wall;
[0027] 210, first detection ring; 220, second detection ring;
[0028] 300, observation window. Detailed description of the specific implementation
[0029] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.
[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.
[0031] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If the first and second are described, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.
[0032] In the description of the present application, unless otherwise clearly defined, terms such as "setting", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.
[0033] In the description of the present application, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0034] In the related art, flatness refers to the flatness in the vertical direction of the circuit board surface, that is, the height deviation of the circuit board surface. Flatness will affect the mounting of components in the PCB. Therefore, before mounting components, it is necessary to perform a flatness test on the PCB. And the common flatness test method is the laser triangulation method. In the measuring device of the laser triangulation method, usually a laser displacement sensor is added beside the CCD lens of the three-dimensional device. Based on the laser triangulation displacement sensor technology, the laser displacement sensor emits a beam of laser, and after passing through optical elements such as lenses, optical fibers, and prisms, it forms a parallel and coherent laser beam that irradiates on the object to be measured. When the laser beam irradiates on the object surface, part of the light will be reflected, and these reflected lights are received by the receiving element. By calculating the angle of the reflected light and the known distance between the laser emitter and the receiver, the distance between the sensor and the object can be calculated.
[0035] During measurement, the CCD lens is used to capture the center of the measurement pad, and the laser triangulation instrument is used to measure the flatness of the pad. There is a certain distance between their centers. Its specific working mode is as follows: after the CCD lens grabs the center of the pad (pad), then the CCD lens moves (according to the coordinate difference between the centers of the CCD lens and the laser triangulation instrument), so that the laser triangulation instrument moves to the center position of the pad.
[0036] However, during the maintenance, cleaning, or measurement of the three-dimensional device, it is easy to touch the laser triangulation instrument, resulting in the position of the laser being moved or the position of the CCD lens being deviated, which will cause the height measurement position to be deviated, and then there will be a problem of inaccurate measurement.
[0037] In view of this, the present application proposes a detection device for correcting whether the position and angle of the flatness test device have deviated to ensure the accuracy of measurement.
[0038] See Figures 1 to 5 , an embodiment of the present application discloses a detection device for detecting whether there is a deviation between the position and angle of a flatness testing device and a preset position. Among them, the detection device includes a housing 100 and a detection ring assembly.
[0039] Specifically, the housing 100 is a hollow structure. A positioning ring 120 is provided at the top of the housing 100. There is a receiving cavity 110 inside the housing 100. An opening 130 is provided at the top of the housing 100. The opening 130 is located inside the positioning ring 120. An observation window 300 communicating with the receiving cavity 110 is provided on the side wall 150 of the housing 100; the detection ring assembly includes a first detection ring 210 and a second detection ring 220 that are concentrically arranged with the bottom of the receiving cavity 110. The diameter of the first detection ring 210 is smaller than that of the second detection ring 220. The second detection ring 220 is higher than the first detection ring 210. The first detection ring 210 is used to detect whether there is a deviation between the planar position of the laser spot and the preset position. The second detection ring 220 is used to detect the laser offset angle.
[0040] During detection, light enters the receiving cavity 110 from the opening 130 on the top wall 140 of the housing 100. By observing the relative position between the laser spot on the bottom of the housing 100 and the first detection ring 210, it can be determined whether the light has shifted; by observing the distance between the laser spot and the second detection ring 220, it can be determined whether the light has an angular shift. In this way, it can be detected by the detection device of the embodiment of the present application whether the actual coordinate difference between the laser triangulation sensor and the CCD lens is the same as the set value. At the same time, it can be observed through the detection device whether the angle of the laser triangulation sensor is tilted, which helps to improve the detection and confirmation efficiency of the laser triangulation sensor.
[0041] In an embodiment of the present application, the flatness detection device includes a coordinate measuring machine. The coordinate measuring machine includes a CCD camera and a laser triangulation sensor. Among them, the laser triangulation sensor includes a laser or a laser displacement sensor. The laser emitted by the laser displacement sensor is perpendicular to the bottom of the receiving cavity (which can be the bottom wall of the housing 100 or the workbench on which the housing 100 is placed). For the convenience of detection, usually the laser displacement sensor emits laser light in the vertical direction. It should be understood that in other usage scenarios, the direction of the laser emitted by the laser displacement sensor can be set to the corresponding direction according to the detection needs.
[0042] In a possible detection result, the laser spot of the laser triangulation sensor irradiates on the bottom of the receiving cavity 110, and the laser spot is located at the center of the first detection ring 210. In this way, it can be determined that the angle of the laser triangulation sensor has no angular tilt with the preset position.
[0043] In a possible detection result, part or all of the laser spot is exposed outside the second detection ring 220, or the laser spot is offset to any side relative to the second detection ring 220, but there is no laser spot on the side wall of the second detection ring 220. In this case, it can be determined that the planar position of the laser triangulation device has deviated from the preset position, but the angle of the laser triangulation device has not tilted relative to the preset position.
[0044] In a possible detection result, the laser spot is projected on the inner wall of the second detection ring 220. Thus, it can be determined that the laser triangulation device has tilted at an angle relative to the preset position.
[0045] In some embodiments of the present application, the diameter of the first detection ring 210 is smaller than the diameter of the opening 130, and the diameter of the second detection ring 220 is larger than the diameter of the opening 130. Among them, the diameter of the first detection ring 210 being smaller than the diameter of the opening 130 can make the laser spot projected onto the first detection ring 210 larger than the projected area of the first detection ring 210, and enable the laser spot to use the first detection ring 210 as a reference for the planar position, facilitating the operator to determine whether the laser triangulation device has deviated from the preset position. The diameter of the second detection ring 220 is larger than the diameter of the opening 130. When the position of the laser triangulation device has not tilted relative to the preset position, the laser spot can pass through the opening 130 and be projected into the second detection ring 220, and the laser spot will not be projected onto the inner wall of the second detection ring 220. When the position of the laser triangulation device has tilted relative to the preset position, the laser spot can be projected onto the inner wall of the second detection ring 220, which helps the operator determine whether the laser triangulation device has tilted at an angle.
[0046] In some embodiments of the present application, the side wall of the second detection ring 220 is perpendicular to the bottom of the housing 100, and the height of the second detection ring 220 is H, satisfying: H > 0. That is to say, the second detection ring 220 presents as a tubular structure with a certain height in the accommodation cavity 110. Thus, when the position of the laser triangulation device has tilted at an angle relative to the preset position, the laser spot of the laser triangulation device can be projected onto the inner wall of the second detection ring 220, which helps the operator determine whether the position of the laser triangulation device has tilted at an angle according to the position of the laser spot.
[0047] In some embodiments of the present application, the material of the second detection ring 220 is a transparent or semi-transparent material. When there is a laser spot projected onto the second detection ring 220, the transparent or semi-transparent second detection ring 220 can facilitate the operator to observe the laser spot projected onto the second detection ring 220, thereby facilitating the operator to determine whether the laser triangulation device has tilted at an angle.
[0048] In a possible implementation manner, the diameter of the first detection ring 210 is 10% smaller than the diameter of the opening 130. In this way, it is possible to determine whether there is a position deviation of the laser triangulation instrument by observing whether the laser spot projected onto the bottom of the accommodation cavity 110 is evenly distributed on the outer periphery of the first detection ring 210.
[0049] In some embodiments of the present application, the diameter of the second detection ring 220 is 10% larger than the diameter of the opening 130. In this way, when the laser triangulation instrument is tilted at a certain angle, the laser spot can be projected onto the second detection ring 220, avoiding the situation where the laser spot is directly projected outside the second detection ring 220, and the probability of misjudgment can be reduced. It should be understood that setting the diameter of the second detection ring 220 to be 10% larger than the diameter of the opening 130 provides a reasonable buffer area for the second detection ring 220, avoiding the situation where the laser spot directly irradiates an area outside the second detection ring 220 and cannot be projected onto the inner side wall of the second detection ring 220.
[0050] In some embodiments of the present application, the inner wall of the housing 100 is provided as a light-absorbing surface so that light is diffusely reflected after irradiating the inner wall. In this way, the situation where the light irradiating the inner wall of the housing 100 is reflected onto the first detection ring 210 or the second detection ring 220 can be reduced, and the probability of misjudgment can be lowered.
[0051] In some embodiments of the present application, the material of the housing 100 is a non-transparent material to prevent external light from entering the accommodation cavity 110 through the side wall 150 of the housing 100. In this way, it can be further ensured that the laser spot projected onto the first detection ring 210 or the second detection ring 220 is the one projected onto the first detection ring 210 or the second detection ring 220 after the laser triangulation instrument passes through the opening 130.
[0052] In some embodiments of the present application, the number of the observation windows 300 is one or more. When the number of the observation windows 300 is multiple, the multiple observation windows 300 are circumferentially spaced apart around the outer wall of the housing 100. In this way, it is convenient for the operator to observe the situation of the laser spot on the first detection ring 210 or the second detection ring 220 from multiple angles, which is beneficial to improving the detection accuracy.
[0053] In some embodiments of the present application, the diameter of the opening 130 is the same as the diameter of the laser spot of the laser triangulation instrument, so that the laser spot can irradiate from the opening 130 to the bottom of the accommodation cavity 110.
[0054] The embodiments of the present application have been described in detail above with reference to the drawings. However, the present application is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present application within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
Claims
1. A detection device, characterized in that, Comprising: A housing, a centering ring is provided at the top of the housing, an accommodation cavity is provided inside the housing, an opening is provided at the top of the housing, the opening is located inside the centering ring, and an observation window communicating with the accommodation cavity is provided on the side wall of the housing; A detection ring assembly, including a first detection ring and a second detection ring concentrically arranged with the bottom of the accommodation cavity, the diameter of the first detection ring is smaller than the diameter of the second detection ring, the second detection ring is higher than the first detection ring, the first detection ring is used to detect the planar position offset of the laser, and the second detection ring is used to detect the laser offset angle.
2. The detection device according to claim 1, characterized in that The diameter of the first detection ring is smaller than the diameter of the opening, and the diameter of the second detection ring is larger than the diameter of the opening.
3. The detection device according to claim 1 or 2, characterized in that, The side wall of the second detection ring is perpendicular to the bottom of the housing, and the height of the second detection ring is H, satisfying: H > 0.
4. The detection device according to claim 3, characterized in that, The material of the second detection ring is a transparent or semi-transparent material.
5. The detection device according to claim 1, characterized in that The diameter of the first detection ring is 10% smaller than the diameter of the opening.
6. The detection device according to claim 1 or 5, characterized in that, The diameter of the second detection ring is 10% larger than the diameter of the opening.
7. The detection device according to claim 1, characterized in that The inner wall of the housing is provided as a light-absorbing surface so that the light is diffusely reflected after irradiating the inner wall.
8. The detection device according to claim 1, wherein The material of the housing is a non-transparent material to prevent external light from entering the accommodation cavity through the side wall of the housing.
9. The detection device according to claim 1, wherein The number of the observation windows is one or more. When the number of the observation windows is multiple, the multiple observation windows are circumferentially and spaced apart around the outer wall of the housing.
10. The detection device according to claim 1, characterized in that, The diameter of the opening is the same as the diameter of the laser spot so that the laser spot can irradiate from the opening to the bottom of the accommodation cavity.