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Calibrator for three-dimensional oral scanner

A scanner and calibrator technology, which is applied in the field of calibrators, can solve the problems that automatic calibration devices are difficult for oral three-dimensional scanners, and has no further improvement, and achieves the effects of high precision and accurate internal and external parameters.

Pending Publication Date: 2022-06-24
NINGBO FREQTY PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN 211046994 U discloses a scanner automatic calibration device, but the automatic calibration device is difficult to be applied to the field of oral three-dimensional scanner
The main reason is: in the field of 3D oral scanners, the accuracy of 1D or 2D is enough to make the 3D oral scanners in a state of reasonable accuracy, and there is no motivation for further improvement

Method used

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  • Calibrator for three-dimensional oral scanner
  • Calibrator for three-dimensional oral scanner
  • Calibrator for three-dimensional oral scanner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example:

[0034] In the first posture state, the first centerline A and the second centerline B of the calibration plate are located on the Y axis and the X axis respectively, the center O of the calibration plate is located at the origin, the first centerline A and the second centerline B is two straight lines that are perpendicular to each other through the center of the calibration plate, that is, in a horizontal state.

[0035] In the second posture state, the angle between the second centerline B of the calibration plate and the X-axis is 20°. By releasing the driving force of the tilting and rotating drive part, the support of the calibration plate can be lowered under the action of the counterweight. Rotate to the position of the limit block to achieve.

[0036] In the third posture state, the included angle between the second center line B of the calibration plate and the X axis is 20°, and the included angle between the first center line A and the Y a...

Embodiment 2

[0045] In this embodiment, the 9 pose states are similar to the previous embodiments, the difference is that in the second to fifth pose states, the angle between the second center line of the calibration plate and the X axis is 30°.

[0046] In the embodiment of the present invention, the preset instruction may include a driving instruction and a scanning instruction, and the driving instruction is used to instruct the lift driving part 6 , the horizontal rotation driving part 7 and the tilting rotation driving part 8 to be driven in a preset order, so that the calibration plate is sequentially In the above nine posture states, the scan instruction is used to instruct the oral scanner 3 to perform a scan operation when the calibration plate is in the specified posture state.

[0047] In addition, in this embodiment of the present invention, a communication interface 19 , such as a USB interface, may also be provided on the base 2 . By connecting the USB interface with the con...

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Abstract

The invention provides a calibrator for a three-dimensional oral cavity scanner, which comprises a shell and a controller, the upper end of the shell is provided with an insertion port for the oral cavity scanner to insert, the shell is internally provided with a calibration plate and a calibration driving mechanism, and the calibration driving mechanism is used for driving the calibration plate to move on three axes of a space coordinate system. The controller is used for controlling the oral cavity scanner and the calibration driving mechanism to execute corresponding operation according to a preset instruction, so that the oral cavity scanner scans image data of the calibration plate in different pose states. The scanning precision of the oral cavity scanner can be improved.

Description

technical field [0001] The invention relates to a calibrator, in particular to a calibrator for a three-dimensional oral scanner. Background technique [0002] The three-dimensional oral scanner needs to be calibrated when it leaves the factory to obtain the internal and external parameters of the scanner's measurement system. The calibration result will directly affect the accuracy and stability of the scanner. However, the internal and external parameters will change with the environment and time, making the measurement system biased. For example, the change of temperature in the environment will change the lens glass and structural components of the measurement system, which will cause measurement deviation; the change of time also affects the stress of the material itself, adhesive, screws and other auxiliary devices of the measurement system with time. Releases slowly, causing measurement deviations. Therefore, the three-dimensional oral scanner needs to be calibrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C9/00A61C19/00
CPCA61C9/0046A61C19/00
Inventor 敖明武庄富强王岱谢小甫吴明军邹强鲁宇张进
Owner NINGBO FREQTY PHOTOELECTRIC TECH CO LTD
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