JPH06185949A - Articulated three-dimensional measuring instrument - Google Patents

Abstract

PURPOSE:To three-dimensionally measure an object to be measured at a low cost with intermediate to low accuracy by making an operator to softly bring the front end of a contact into contact with an arbitrary point on the object to be measured by operating a handle and input the shape, dimension, and contact angle of the front end section of the contact to a personal computer. CONSTITUTION:A revolving frame 12 is horizontally and rotatably fitted to a swivel base 13 through a swing bearing and an encoder 14 is fitted to the axial center of the frame 12 so as to detect the rotation angle between the base 13 and frame 12. The operator of the title measuring instrument softly brings the front end section of a contact 3 with an arbitrary measurement point on an object 2 to be measured by moving a handle 5 and instructs a personal computer 1 to fetch measurement data. The computer 1 inputs parameters, such as the shape, dimension, contact angle, etc., of the front end section of the contact 3 and calculates the rotational angles of the frame 12 and arms 10 and 11 detected by encoders 14, 15, and 16. Then the computer 1 is made to display or record the relative three-dimensional position between the front end section of the contact 3 and the arbitrary point on the object 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for manually and simply performing three-dimensional measurement.

[0002]

2. Description of the Related Art Conventionally, low precision 3 among machined parts
When performing dimension measurement, a complicated operation was required using a very expensive three-dimensional measurement device. Therefore, in small and medium-sized enterprises, inspections and the like that require three-dimensional measurement have not been performed. As a result, no machining defects could be found up to the assembly and adjustment stages of the parts, and much effort was required to correct the parts during the assembly and adjustment stages. In addition, even in the design and development stage, it took time and effort to measure the existing component shape and dimensions with a three-dimensional measuring device.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to enable medium- and low-precision three-dimensional measurement at a low cost with the same simplicity as a measuring instrument such as a caliper.

[0004]

[Means for Solving the Problems]

(A) The swivel base (13) is provided with a rotatable swivel frame (12) in which the encoder 1 (14) is interlocked. (B) Encoder 2 (15) on the swing frame (12)
A rotatable arm 1 (10) interlocking with is provided. (C) The arm 1 (10) is provided with the rotatable arm 2 (11) in which the encoder 3 (16) is interlocked. (D) A parallel link (6) is rotatably provided on the arm 2 (11). (E) Link 1 (8), intermediate parallel link 1 (7) and link 2 (9) are parallel link (6) and arm 1 respectively.
(10) and the pivotal support of the arm 2 (11) and the swing frame (12) are rotatably provided. (F) Contact holder (4) at the end of the parallel link (6)
The contactor (3) is attached via. (G) Encoder 1 (14), encoder 2 (1
5), connect the signal line (25) of the encoder 3 (16) to the personal computer (1).

[0005]

[Operation] The operator manually moves the grip (5) and lightly touches the tip of the contactor (3) to an arbitrary point on the object (2) to be measured, and contacts the contactor (3) with the personal computer (1). By inputting the shape, size, and contact angle of the tip of the contact, the angles of the encoder 1 (14), encoder 2 (15), and encoder 3 (16) are calculated, and the tip of the contactor (3) is calculated. Middle- and low-precision three-dimensional measurement is performed by deriving a relative three-dimensional position from an arbitrary point of the object to be measured (2) from a measurement reference point.

[0006]

[Embodiment] In FIG. 2, a revolving frame (12) is horizontally rotatably attached to a revolving base (13) through a revolving bearing (24), and an encoder 1 (1
4) Mounted swivel base (13) and swivel frame (12)
The arm 1 (10) which can be rotated vertically is attached to the swivel frame (12) installed so that the rotation angle of the swivel frame can be detected, the encoder 2 (15) is attached to the axis of the swivel frame (12) and the vertical arm 1 ( Install so that the rotation angle in 10) can be detected. The arm 2 (11) is attached to the arm 1 (10) so as to be vertically rotatable, and the encoder 3 (16) is attached to the axis of the arm 1 (10) so that the rotation angle of the arm 1 (10) and the arm 2 (11) can be detected. The parallel link (6) is rotatably attached vertically to the end of the arm 2 (11), and the link 1 is attached to the other end of the parallel link (6).
(8) is rotatably mounted vertically, and the other end of link 1 (8) is rotatably mounted coaxially on intermediate parallel link 1 (7) and link 2 (9) vertically.
The other end of (7) is attached to the rotating shaft of the arm 1 (10) and the arm 2 (11), and the other end of the link 2 (9) is rotatably attached to the revolving frame (12) vertically, respectively, so as to be parallel links (6).
Is moved in parallel with the horizontal rotation axis of the swivel base (13) and the swivel frame (12). In FIG. 3, a contact holder (4) is horizontally rotatably attached to the tip of the parallel link (6), and a hard ball 2 (20) and a spring 1 are attached to a positioning hole 1 (18) provided in the contact holder (4). 90 at (21)
Positioning holes 2 (1) provided in the contactor (3) are provided so that the contactor (3) is attached to the contactor holder (4) via a shaft (17) so as to be vertically rotatable.
9) Hard balls 1 (22) can be positioned by springs 2 (23) every 90 degrees. In FIG. 1, the signal lines (25) of the encoder 1 (14), the encoder 2 (15), and the encoder 3 (16) are connected to the personal computer (1), and the swivel base (13) and the swivel frame (1) are connected.
2) The relative angles of the swivel frame (12) and the arm 1 (10) and between the arm 1 (10) and the arm 2 (11) are loaded as data into the personal computer (1).

The present invention has the above-described structure, and when using this, the operator moves the grip (5) by hand to contact the contact point (3) at an arbitrary measuring point of the object (2) to be measured. ) Of the contactor (3) is instructed to capture the measurement data continuously or discontinuously, and the parameters such as the shape, size and contact angle of the contactor (3) are set. Encoder 1 (14), encoder 2 (1
5) Calculate each angle of the encoder 3 (16) and display or record the relative three-dimensional position of the tip of the contactor (3) and an arbitrary point of the DUT (2) on the personal computer (1). Then, the object (2) to be measured is three-dimensionally measured. Further, the orientation of the contactor (3) is changed so that the measurement can be easily performed at an arbitrary measurement point of the device under test (2).

[0008]

According to the present invention, the mechanism is simpler than the conventional three-dimensional measuring device, and the manufacturing cost can be very low, so that even small and medium-sized enterprises can perform three-dimensional measurement, which has been impossible until now. It is easy to inspect various processed parts. Also, since there are no parts to be driven, there is no danger during operation, and simple operation makes it easy for anyone to handle. Moreover, since the mechanism is simple, the weight of the device is light and it can be carried around, and it is possible to carry out the measurement while moving to the object to be measured. Also, by processing the measurement data with a personal computer or the like, NC data and CAD data can be created, so that it can be used as a low-cost three-dimensional input device.

[Brief description of drawings]

FIG. 1 is an overall perspective view of the present invention

FIG. 2 is a side view of the present invention.

FIG. 3 is a sectional view taken along the line AA of the present invention.

[Explanation of symbols]

 1 Personal Computer 2 Object to be Measured 3 Contact Element 4 Contact Element Holder 5 Handle 6 Parallel Link 7 Intermediate Link 1 8 Link 1 9 Link 2 10 Arm 1 11 Arm 2 12 Swivel Frame 13 Swivel Base 14 Encoder 1 15 Encoder 2 16 Encoder 3 17 Shaft 18 Positioning hole 1 19 Positioning hole 2 20 Hard ball 2 21 Spring 1 22 Hard ball 1 23 Spring 2 24 Slewing bearing 25 Signal line

Claims (1)

[Claims] 1. An encoder 1 (1) mounted on a swivel base (13).
4) is provided with a rotatable swivel frame (12), and the swivel frame (12) is provided with a rotatable arm 1 (10) that is interlocked with an encoder 2 (15). ) Is provided with a rotatable arm 2 (11) interlocked with an encoder 3 (16).
(11), link 1 (8), intermediate parallel link 1 (7)
And a parallel link (6) depending on the link 2 (9),
A multi-joint type three-dimensional measuring instrument in which a contact (3) is attached to an end of a parallel link (6) via a contact holder (4). 1. An articulated three-dimensional measuring device comprising the articulated three-dimensional measuring device according to claim 1, a personal computer, and a measurement program.