A three-camera handheld 3D laser scanner for flash hole measurement

Abstract

The present invention relates to a three-camera handheld three-dimensional laser scanner for flash measurement of hole positions, comprising: a connecting rod handle, a camera is arranged at each end of the connecting rod handle, a laser is arranged in the middle of the connecting rod handle, the focal points of the two cameras overlap and are located on the optical path of the laser; a hole measuring camera is also arranged on the connecting rod handle, between the laser and one of the cameras, and the focal point of the hole measuring camera overlaps with the focal points of the two cameras. The relative positions of the three cameras are fixed, and the value of the hole can be calculated through the positional relationship of the three cameras and the three sets of images collected. The problem of the contradiction between identifying the mark point and measuring the hole is solved, and the range, speed and accuracy of measuring the hole diameter are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional scanners, and in particular to a three-camera handheld three-dimensional laser scanner for flash hole measurement. Background Art

[0002] At present, handheld laser 3D scanners with flash hole measurement function are all binocular cameras. When measuring hole positions, it is necessary to be able to identify enough mark points and illuminate and overexpose the plane around the target hole. Identifying mark points does not require the light to be too bright, but measuring holes requires the light to be very bright, which is contradictory. Therefore, the light emitted by the hole measurement lamp needs to be very focused, and can only illuminate 1 / 2 of the camera's field of view to measure the hole, and the remaining 1 / 2 of the field of view is used to identify the mark points. Only in this way can the hole position be measured. Therefore, the area of ​​flash hole measurement is relatively small, the speed is slow, and the diameter of the hole that can be measured is limited. At the same time, because the camera can only identify 1 / 2 of the field of view mark points, it will reduce the accuracy and stability of hole position measurement. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the present invention provides a three-camera handheld three-dimensional laser scanner for flash hole measurement.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A three-camera handheld three-dimensional laser scanner for flash measurement of hole positions, comprising: a connecting rod handle, a camera is arranged at each end of the connecting rod handle, a laser is arranged in the middle of the connecting rod handle, the focal points of the two cameras overlap and are located on the optical path of the laser; a hole measuring camera is also arranged on the connecting rod handle, between the laser and one of the cameras, and the focus of the hole measuring camera overlaps with the focus of the camera.

[0006] Furthermore, a filter is provided on the lens of the camera, and a plurality of evenly arranged LED fill lights are provided on the periphery of the lens. The LED fill lights are LED lights emitting fixed wavelengths, and the filter is a filter matching the wavelength of the LED fill lights.

[0007] Furthermore, an infrared filter is provided on the lens of the bore measuring camera, and a plurality of evenly arranged infrared LED lights are provided on the periphery of the lens.

[0008] Furthermore, a base is provided at one end of the connecting rod handle, and a counterweight is provided in the base.

[0009] Furthermore, a power supply module is provided in the base, and the power supply module supplies power to the camera, the hole measuring camera and the laser respectively.

[0010] The beneficial effects of the present invention are as follows: a filter that can only pass 450nm wavelength is added to the camera lenses at both ends of the connecting rod handle, and a 450nm blue light LED lamp is fixed on the periphery of the camera lens to illuminate the mark point, so that the upper and lower cameras can normally identify the mark point during scanning. At the same time, a hole measuring camera is added between the laser and one of the cameras, a filter that can only pass infrared light is added to the hole measuring camera lens, and an infrared LED lamp is installed on the periphery of the hole measuring camera lens to specifically illuminate the target hole. The relative positions of the three cameras are fixed, and the value of the hole can be calculated through the positional relationship of the three cameras and the three sets of images collected.

[0011] The present invention utilizes the characteristics of filters with different bandwidths that can only pass light of specific wavelengths, and the fixed relative position relationship between the three cameras, so as to calculate the value of the hole in any camera image, thereby realizing accurate and large-scale measurement of the hole position. The problem of contradiction between identifying the mark point and measuring the hole is solved, and the range, speed and accuracy of measuring the hole diameter are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic structural diagram of a three-camera handheld three-dimensional laser scanner for flash hole measurement provided in an embodiment of the present invention.

[0013] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0014] 1. Link handle, 2. Camera, 3. Laser, 4. Hole measuring camera, 5. Filter, 6. LED fill light, 7. Infrared filter, 8. Infrared LED light, 9. Base. DETAILED DESCRIPTION

[0015] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0016] like Figure 1 As shown, an embodiment of the present invention provides a three-camera handheld three-dimensional laser scanner for flash measurement of hole positions, comprising: a connecting rod handle 1, a camera 2 is arranged at each end of the connecting rod handle 1, a laser 3 is arranged in the middle of the connecting rod handle 1, and the focal points of the two cameras 2 overlap and are located on the optical path of the laser 3; a hole measuring camera 4 is also arranged on the connecting rod handle 1, between the laser 3 and one of the cameras 2, and the focus of the hole measuring camera 4 overlaps with the focus of the camera.

[0017] The lens of the camera 2 is also covered with a filter 5, and a plurality of evenly arranged LED fill lights 6 are provided on the periphery of the lens. The LED fill lights 6 are LED lights emitting fixed wavelengths, and the filter 5 is a filter that matches the wavelength of the LED fill lights.

[0018] In this embodiment, the LED fill light 6 is a blue LED light emitting a wavelength of 450nm, and the filter 5 is a filter that can only transmit a wavelength of 450nm.

[0019] As a preferred embodiment, based on the above embodiment, an infrared filter 7 is further provided on the lens of the bore measuring camera 4, and a plurality of evenly arranged infrared LED lights 8 are provided on the periphery of the lens.

[0020] Furthermore, a base 9 is provided at one end of the connecting rod handle, and a counterweight block is provided inside the base 9.

[0021] When the three-dimensional laser scanner is stationary, the base is placed vertically downward. In order to increase its stability, a counterweight (not shown) is also arranged in the base.

[0022] Furthermore, a power supply module is provided in the base 9, and the power supply module supplies power to the camera, the hole measuring camera, the laser, the LED fill light, and the infrared LED light respectively.

[0023] In the embodiment of the present invention, filters that can only pass 450nm wavelength are added to the two camera lenses located at the upper and lower ends of the connecting rod handle, and multiple 450nm blue light LEDs are fixed around the camera lenses to illuminate the mark points. The upper and lower cameras can normally identify the mark points during scanning. At the same time, a hole measuring camera is added between the laser and the upper camera, and a filter that can only pass infrared light is added to the lens of the hole measuring camera. An infrared LED lamp is installed on the hole measuring camera lens to specifically illuminate the target hole. The relative positions of the three cameras are fixed, and the value of the hole can be calculated through the positional relationship of the three cameras and the three sets of images collected.

[0024] The present invention utilizes the characteristics of filters with different bandwidths that can only pass light of specific wavelengths, and the fixed relative position relationship between the three cameras, so as to calculate the value of the hole in any camera image, thereby realizing accurate and large-scale measurement of the hole position. The problem of contradiction between identifying the mark point and measuring the hole is solved, and the range, speed and accuracy of measuring the hole diameter are improved.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-camera handheld 3D laser scanner for flash hole measurement, characterized in that: include: A connecting rod handle (1), wherein a camera (2) is disposed at each end of the connecting rod handle (1), a laser (3) is disposed in the middle of the connecting rod handle, and the focal points of the two cameras (2) overlap and are located on the optical path of the laser (3); a hole measuring camera (4) is also disposed on the connecting rod handle (1) and between the laser (3) and one of the cameras (2), and the focal point of the hole measuring camera (4) overlaps with the focal points of the two cameras (2); The lens of the camera (2) is also covered with a filter (5), and a plurality of evenly arranged LED fill lights (6) are provided on the periphery of the lens, wherein the LED fill lights (6) are LED lights emitting fixed wavelengths, and the filter (5) is a filter matching the wavelength of the LED fill lights (6); The lens of the bore measuring camera (4) is also covered with an infrared filter (7), and a plurality of evenly arranged infrared LED lights (8) are provided on the periphery of the lens.

2. The three-dimensional laser scanner according to claim 1, characterized in that: A base (9) is also provided at one end of the connecting rod handle, and a counterweight is provided inside the base (9).

3. The three-dimensional laser scanner according to claim 2, characterized in that: A power supply module is provided in the base (9), and the power supply module supplies power to the camera, the hole measuring camera, and the laser respectively.

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