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Optical pen type visual target object based on active light emission principle

An active lighting and principle technology, applied in the field of visual inspection, can solve the problem of low tracking accuracy, and achieve the effect of improving calibration accuracy, speeding up identification, and reducing fatigue.

Inactive Publication Date: 2018-12-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low calibration and tracking accuracy of existing visual targets, to provide a light pen-type visual target based on the principle of active light emission, and to improve the detection accuracy and calibration accuracy of visual feature points from the structural design , while meeting the characteristics of ease of use

Method used

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  • Optical pen type visual target object based on active light emission principle
  • Optical pen type visual target object based on active light emission principle
  • Optical pen type visual target object based on active light emission principle

Examples

Experimental program
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Effect test

example 1

[0018] Real-time example one: see Figure 1~Figure 3 , the mechanical parts of the light pen visual target based on the principle of active light include: housing (1), diffusion plate (2), sleeve (3), extension rod (4), probe (5), connecting plate ( 10), the back cover (11), the circuit part includes: microcontroller (12), status indicator light (18-1), direction indicator light (18-2), Bluetooth module (13), left record button (14) , right cancel button (15), main switch (16), 7.4V lithium battery (17), 850nm infrared light-emitting LED (IR1-IR7) (20) and 12V lithium battery (19). It is characterized in that: the housing (1) is connected to the stylus (5) through the connecting plate (10) to form a measurement unit, and the stylus is touched to the target object by holding the target to complete the measurement of the coordinates of the contact point; the infrared light-emitting LED (IR1-IR7) (20) is connected with 12V lithium battery (19) to form an infrared light-emitting ...

Embodiment 2

[0019] Embodiment 2: This implementation example is basically the same as the real-time example 1, and the special features are as follows: the lighting unit composed of the light pen type visual target diffuser plate (2) and the sleeve (3): the sleeve (3) is in the form of a tube Shaped structure, hollow inside, the bottom is connected with the end face of the shell (1) by a flange-like step surface, which is convenient to improve the positioning accuracy; the top of the sleeve (3) is a circular through hole, and the diffuser plate (2) is stepped, embedded The through hole at the top of the sleeve (3) forms a complete end face; the circular diffuser plate (2) is beneficial to improve the luminous quality of infrared LEDs and improve the positioning accuracy of the center of the circular spot collected by visual equipment; at the same time, the diffuser plate (2) and the sleeve (3) The coaxial and coplanar design enables the three-coordinate measuring machine to measure the pos...

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Abstract

The invention discloses an optical pen type visual target object based on an active light emission principle. The visual target object mainly comprises a casing, a diffuser plate, a bushing, an extension rod, a probe, a connecting plate, a back cover, a microcontroller, a state indicating lamp, a Bluetooth module, a left recording button, a right cancelling button, a master switch, a 7.4V lithiumbattery, 850nm infrared LEDs (IR1-IR7), and a 12V lithium battery. During use, the probe of the target object makes contact of a measured object, the recording button is pressed, visual equipment carries out visual positioning calculation via the infrared LEDs on the target object to obtain coordinate information of the measured object, and the cancelling button is pressed to remove last measurement data; and the bushing is combined with the diffuser plate to form a light emission unit, so that image processing of a light spot center is improved, coordinates of the light spot center can be measured by a tri-coordinate measuring machine, and the scaling and high-precision measuring capabilities of the visual target are improved.

Description

technical field [0001] The invention belongs to the technical field of visual detection and relates to a light pen type visual target based on the principle of active light emission. Background technique [0002] The light pen visual target is a target tracking accessory for stereo vision equipment. The light pen visual target is used for target tracking and high-precision positioning of stereo vision equipment. [0003] Handheld three-coordinate measurement can flexibly measure the geometric features of workpieces in space. And it requires high precision and high system stability. Especially for complex industrial site environments, the light pen-type visual measurement target based on the principle of active light is widely used in handheld three-coordinate measuring equipment. [0004] At present, the common handheld three-coordinate measurement targets are divided into point contact type and line structured light non-contact type. The light pen visual target is measur...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/02
CPCG01B11/002G01B11/02
Inventor 张曦张健
Owner SHANGHAI UNIV