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A scanning measuring device and measuring method for the axis of a deep hole

A measuring device and deep hole technology, applied in the field of geometric quantity measurement, can solve problems such as the influence of axis fitting, loss of measurement accuracy, and expansion of field of view, and achieve the effects of reducing labor, facilitating operation, and improving measurement efficiency

Active Publication Date: 2021-11-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are currently research teams that use conical mirrors to expand a single laser beam, take images of the expanded laser, and measure the entire closed plane through image processing. This method has sufficient measurement points, but when measuring large-sized workpieces, in order to ensure that the camera captures a complete image, loss of measurement accuracy while enlarging the field of view
The corresponding device uses the ultrasonic dual crystal probe to obtain the thickness of the workpiece to determine the center of the circle, but it is only suitable for the axis measurement of the concentric hole on the cylindrical workpiece
The above-mentioned devices can obtain the relevant information of a certain section inside the hole. In order to obtain the axis information of the measured hole, the measuring device needs to be moved along the axis of the hole. Fitting has some influence

Method used

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  • A scanning measuring device and measuring method for the axis of a deep hole
  • A scanning measuring device and measuring method for the axis of a deep hole
  • A scanning measuring device and measuring method for the axis of a deep hole

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Embodiment 1

[0043] Such as Figure 1-2 As shown, a scanning measurement device for the axis of a deep hole includes a frame 1, a telescopic mechanism 2 and a scanning mechanism 3. The telescopic mechanism 2 is erected on the frame 1, and the output end of the telescopic mechanism 2 is vertically downward. The output end of telescopic mechanism 2 is connected, and scanning mechanism 3 comprises first fixed plate 31, second fixed plate 32 and six sensors 33, and first fixed plate 31 is vertically connected with the output end of telescopic mechanism 2 by first connecting rod 34, The second fixed plate 32 is arranged in parallel with the first fixed plate 31, and the second fixed plate 32 is connected with the first fixed plate 31 through the second connecting rod, wherein the output ends of the three sensors 33 are arranged on the first fixed circle with the first circumscribed circle. The plate 31 and the output ends of the other three sensors 33 are arranged on the second fixed plate 32 i...

Embodiment 2

[0052] Such as Figure 1-2 Shown, the measuring method of the scanning measuring device of a kind of embodiment 1 deep hole axis, comprises the steps:

[0053] S1. Move the deep hole to be measured to directly below the scanning mechanism 3;

[0054] S2. The telescopic mechanism 2 starts to work, pushes the scanning mechanism 3 into the deep hole, and the telescopic mechanism 2 carries the scanning mechanism 3 to perform a stepping motion along the axis with a stepping distance of s, and the displacement sensor collects data once for each step;

[0055] S3, the three sensors 33 on the first fixed plate 31 and the three sensors 33 on the second fixed plate 32 fit the deep hole sections where they are located, and respectively obtain the center position coordinates of the current section;

[0056] S4, through data processing, obtain new circle center position coordinates respectively;

[0057] S5. The axis of the deep hole can be obtained by connecting multiple new center posi...

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Abstract

The invention belongs to the technical field of geometric quantity measurement, and in particular relates to a deep hole axis scanning measurement device, comprising a frame, a telescopic mechanism and a scanning mechanism. It is connected to the output end of the telescopic mechanism. The scanning mechanism includes a first fixed plate, a second fixed plate and six sensors. The first fixed plate is vertically connected to the output end of the telescopic mechanism through a first link, and the second fixed plate The fixed plates are arranged in parallel, and the second fixed plate and the first fixed plate are connected by a second connecting rod, wherein the output ends of the three sensors are arranged on the first fixed plate with a first circumscribed circle, and the output ends of the other three sensors are arranged on the second fixed plate. The circumscribed circle is arranged on the second fixing plate, and the first circumscribed circle and the second circumscribed circle are coaxial. The scanning measuring device has the characteristics of strong versatility, high precision and high efficiency. In addition, a measurement method of the scanning measurement device is also provided to improve the stability and efficiency of its work.

Description

technical field [0001] The invention belongs to the technical field of geometric quantity measurement, and in particular relates to a scanning measurement device and a measurement method for the axis of a deep hole. Background technique [0002] In the measurement of large-sized hole parts, if the measurement is for a simple hole without chamfers, the edge contour of the round hole can be extracted by visual measurement for measurement. This method can obtain the aperture data of the measured hole, but the accuracy of the measurement of the spatial attitude of the hole axis is limited, and the characteristic change of the measured hole along the axial direction cannot be obtained. When the measurement device is deep into the hole to measure the relevant quantity, if the unit displacement sensor is used for measurement, in order to obtain the information of the entire circumferential surface, the measurement device needs to be rotated, and a single sensor is used to achieve c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G01B21/02
CPCG01B21/00G01B21/02
Inventor 刘常杰滕文杰
Owner TIANJIN UNIV