JPS58206909A - Measuring device for optional shape of object - Google Patents

Abstract

PURPOSE:To obtain the precise information on the shape of an optional object easily by measuring the distance between the outside circumferential surface of said object which passes in the device and a sensor disposed circumferentially on the outside thereof continuously and automatically with said sensor. CONSTITUTION:An object 1 to be measured is placed on a transparent bed 2, and a distance sensor 3 is rotated on the circumferential line (a) around the same. The distance P up to the object 1 is measured without contact from the time when the reflected light of the pulse-like ray generated by the sensor 3 is detected in the sensor 3. Since the bed 2 is transparent, the laser light of the sensor 3 is not interrupted. The bed 2 is moved at a sufficiently low speed along the z-axis in parallel with said operation. As a result the sensor 3 rotates around the object 1 spirally and measures the distance P in each part. The distance P and the angle theta obtained from an angle sensor are conducted to an arithmetic circuit, which converts the same to coordinate values x, y, adds the value in the z direction from the moving mechanism of the bed 2 and makes the data on the coordinates x, y, z of the outside surface of the object 1. A computer performs graphic processing, etc. in accordance with such input information.

Description

[Detailed Description of the Invention] [Technical field to which the invention pertains] The present invention automatically measures shape information of a three-dimensional object and performs computer aided
This invention relates to a device for measuring the arbitrary shape of an object to be sent to a device such as esign).

[Description of prior art]

When designing automobiles and their window glasses, designers often first express their external shape using clay models, mock-ups, etc. After that, when engineers design based on this, they first measure several points on the external shape of these clay models with a manual three-dimensional digitizer, etc., and input the shape information into a computer such as an fCAD device. is common. However, such methods have the disadvantage of requiring a large amount of time and effort, especially when precise shape information is required. An object of the present invention is to provide a device for measuring an arbitrary shape of an object, which can accurately and automatically measure the shape of an object and save a great deal of time and labor required for measuring the external shape.

[Key points of the invention]

A distance in the circumferential diametrical direction between a supporting means that supports the object to be measured at a predetermined position and each position on the outer circumferential line of the object to be measured and the outer surface of the object to be measured. a distance measuring means for non-contactly measuring a circumferential line of the distance measuring means; a position information generating means for generating information on a circumferential line upper cover of the distance measuring means; External shape information of the object to be measured obtained from a means for changing the position e + relative to the distance oil constant means, distance information from the distance measuring means, and position information from the position generating means. It is characterized by being fully equipped with a means for sending it to

[Explanation based on examples]

FIG. 1 is a principle diagram of an apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the circumferential line (A) in FIG.

In FIG. 1, an object to be measured 1 such as a clay model, etc.
is placed on a transparent bed 2, and this bed 2 is configured to move back and forth on two axes.

The distance sensor 3 is an optical distance sensor that irradiates the object 1 with a laser beam and measures the distance to the object 1 using the reflected light. It is configured to rotate on the circumferential line (a), and thereby the distance between the distance sensor 3 and the outer surface of the object to be measured l in the circumferential diametrical direction.

It is possible to measure at each position on the circumference line (A). Further, the rotational position angle θ (see Fig. 21) of the distance sensor 3 with respect to the X axis is determined by the angle sensor 4 (the third (see figure).

The pressure IMF measured by the distance sensor 3 and the angle θ measured by the W sensor are determined by the calculation circuit 5 as shown in FIG.
, where: X=rCO8θ=(R-P) coeθ y=rsinθ= (R-P) sinθ However, 1
R is the radius of the circumferential line (a), r is the distance from the coordinate origin to the outer surface of the divine circle 1 constant object, and a conversion calculation is performed. Then, the mechanism 6 that moves the bed 2 back and forth in the 'iz-axis direction m sends out binary values corresponding to the two-axis position information, and this Dz value is used together with the above-mentioned x and y values. The information is stored in the database 7 under the control of the CPU 8. database 7
The stored data is sent to the outside via the output terminal 9 according to a command from the CPU 8.

Next, the operation of the device constructed as described above will be explained.

The object to be measured 1 is placed on the transparent bed 2, and the distance sensor 3 is rotated on the circumference line (a) around it, and the distance sensor 3 measures the distance P from the distance sensor 3 to the object to be measured l. The generated pulsed light beam and the reflected light of this light beam are transmitted to the distance sensor 3.
It is measured non-contact based on the time the light is received. Since the bed 2 is transparent, the laser beam from the distance sensor 3 is not interrupted.

Along with this operation, the bed Zk is moved along the Z-axis at a speed sufficiently slower than the rotational speed of the distance sensor 3. As a result, the distance sensor 3 rotates around the circumference of the object to be measured l on the line [a--along the axis and measures the distance 1ijlIP of each part. The distance P obtained from the distance sensor 3 and the angle θ obtained from the angle sensor 4 are led to the arithmetic circuit 4, where they are converted into the seating position value "sY" as described above, and to this, the two-direction value from the bed moving mechanism 6 is input. By adding the values, the seat m (x, y
, z) are stored as data in the database 7 and automatically input into the computer via the output terminal 9 as required. The computer performs graphical processing etc. based on the input information of and et al.

In addition to the above-mentioned embodiment device, the inventive device can also be configured as follows.

(1) In addition to optical means, a distance sensor using radiation scarlet or the like is used. In this case, the bed is made of a material that allows radiation, etc. to pass through.

(2) Instead of a bed on which the object to be measured is placed, other supporting means, such as one that supports the object by sandwiching it from the front and back, is used.

(6) As a distance sensor, a large number of sensor parts IO are arranged along the circumference as shown in Fig. 4, and the entire external shape of the object to be measured is measured by sequentially scanning these sensor parts IO. Configure it as follows.

(4) Instead of moving the bed back and forth along the fz axis,
The distance sensor is configured to move back and forth along two axes.

(5) Instead of rotating the distance sensor along the circumference line, the object to be measured is fixed to the bed and the distance sensor is configured to be rotated about the fz axis of the bed as the rotation axis.

(6) The distance sensor is constructed so that only the light emitting element and the light receiving element are used as parts that rotate on the circumferential line, and the device for converting the reflected light from the light receiving element into distance is provided at another position.

[Explanation of effects]

The present invention provides swords 1, etc., which have the above-described configuration and operation.
The outer circumferential shape of a child's object can be measured continuously and automatically, and precise shape information of the object can be obtained without requiring a great deal of time and effort.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the uninvented device. FIG. 2 is a sectional view taken along the circumferential line (A) in FIG. 1. FIG. 3 is a block diagram of the components that perform all the data arithmetic processing. FIG. 4 is a configuration diagram of a distance sensor of another embodiment device. 1...V measurement--p object, 2...Bed, 3...Distance sensor, 4...Angle sensor, 5...Arithmetic circuit, 6...
・Bed cooperation 4 beaks, 7...database, 8...C
PU0 Patent Applicant Yokogawa Zaki Seisakusho Co., Ltd. Representative Patent Attorney Naotaka Ide

Claims (1)

[Scope of Claims] (1) A support means for supporting the object to be measured at a predetermined position, and a support means located on the outer circumferential line of the object to be measured and connecting each position on the circumferential line and the outer surface of the object to be measured. distance measuring means for non-contactly measuring the distance in the circumferential diametrical direction between the two; position information generating means for generating information on the position of the distance measuring means on the circumferential line; and a plane orthogonal to the plane formed by the circumferential line. means for relatively displacing the position of the object to be measured and the distance measuring means in a direction in which the object to be measured is obtained by distance information from the distance measuring means and position information from the position generating means; An arbitrary shape measuring device for an object, comprising means for transmitting external shape information to the outside. (2) An arbitrary shape measuring device for an object according to claim 0, wherein the distance measuring means is configured such that one distance sensor rotates along a circumferential line. 6) An arbitrary shape measuring device for an object according to claim (1), wherein the distance measuring means is constituted by a plurality of distance sensors fixedly arranged along a circumferential line. (4) The supporting means is configured to be able to determine the diametrical distance kml between the position on the circumferential line and the outer surface of the object to be measured by rotating the supporting means about a direction perpendicular to the plane formed by the circumferential line. An arbitrary shape measuring device for an object according to claim (1), characterized in that: (5) the distance measuring means optically measures the distance by reflecting a laser beam on the object to be measured; An arbitrary shape measuring device for an object according to any one of claims (1) to (4), characterized in that the distance measuring means measures the radiation Wj. An arbitrary shape measuring device for an object according to any one of claims (1) to (4), characterized in that the entire distance is measured by reflecting the object.