JPH06307816A - Non-contact plate width measuring device - Google Patents

Abstract

PURPOSE:To measure the plate width of a clear object to be measured having a width larger than the predetermined gap between a light projecting part and light receiving part. CONSTITUTION:A light projecting part 2 and a light receiving part 3 are furnished over the width of an object to be measured 55 on its one surface so as to sense the end of the object 55. The part 2 emits a measuring beam B having a specified width L1, and only the light of the portion reflected by the object 55 is sensed by the light receiving part 3 to give the width corresponding to the plate width W which is the distance between the plate ends of the object 55.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact plate width measuring device for optically measuring the plate width of a plate-shaped object to be measured in a non-contact manner.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view of an outer diameter measuring device for measuring the outer diameter of an object to be measured. In this outer diameter measuring device 50, a light projecting portion 51 and a light receiving portion 52 are arranged in a pair, and the light projecting portion 51
Emits a measurement beam having a predetermined width Z to the light receiving unit 52. Therefore, by interposing the object to be measured 55 between the light projecting section 51 and the light receiving section 52, the measuring beam is blocked by the light receiving section 52 by a width corresponding to the outer diameter of the object to be measured 55, and the object to be measured 55. The outer diameter of can be measured without contact.

[0003]

However, in this outer diameter measuring device, the range in which the outer diameter of the object 55 to be measured can be measured is within the predetermined width Z of the measuring beam. Therefore, in the case where the measured object 55 is formed wider than the width Z of the measurement beam, for example, a long plate, the measured object 55 cannot be measured. It should be noted that the light projecting section 51 and the light receiving section 52 cannot be separated from each other by a predetermined distance or more in order to perform highly accurate measurement because of the focal length of the measurement beam. Wide measurement object 55 between 52
Could not be intervened. In this way, the light projecting portion 51 and the light receiving portion 52 are made to face each other, and the object to be measured 55 is placed between them.
In the case of the configuration for measuring, the object to be measured 55 cannot be measured unless the object to be measured 55 can be arranged between them.

Further, when the object 55 to be measured is made of a transparent material, the measuring beam transmits the part to be measured 55, so that the difference in brightness of the received light signal is small, and therefore the outer diameter cannot be accurately measured. It was Furthermore, it was easily affected by scratches and distortion of the transparent body.

The present invention has been made in order to solve the above problems, and when the object to be measured has a distance between the light projecting portion and the light receiving portion or more, that is, the object to be measured has a predetermined width. It is also an object of the present invention to provide a non-contact plate width measuring device capable of measuring the plate width and measuring the plate width even when the object to be measured is transparent.

[0006]

In order to achieve the above object, the non-contact plate width measuring device of the present invention optically non-contact the plate width of an object (55) having a predetermined width (W). A plate width measuring device for measuring, which is arranged at an end of one surface of the object to be measured, and has a predetermined angle (α1) with respect to the object to be measured and a predetermined width (L1) in the width direction of the object to be measured. A light projecting portion (2) having the measurement beam (B) and a measurement beam provided on one surface of the object to be measured and on the same surface as the light projecting portion and emitted from the light projecting portion. A light receiving section (3) for receiving the measurement beam reflected by the object to be measured, and a plate edge of the object to be measured by the light receiving state of the measurement beam by the light receiving section,
And a calculator (30) for calculating the plate width of the object to be measured.

[0007]

Both the light projecting section 2 and the light receiving section 3 are arranged on one surface of the object 55 to be measured, and the measuring beam B of the light projecting section 2 is measured.
Is reflected by the DUT 55 and detected by the light receiving section 3. The light projecting unit 2 is provided at an end position in the width direction of the DUT 55, and thus the measurement beam B is detected by the light receiving unit 3 only at a portion inside the end of the DUT 55. As a result, the calculation unit 3
0 can detect the end position of the DUT 55,
A board width of 5 can be obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first non-contact plate width measuring device of the present invention.
It is a perspective view which shows the structure of an Example. As shown in the figure, in this device, a detector 1 having a lateral width equal to or larger than the width W of the non-measured object 55 is installed on one surface side of the measured object 55 as a plate-shaped object. The DUT 55 has an elongated shape in the direction of arrow A in the figure, and is fixed at the illustrated position or conveyed in the direction A. The angle 10 at the upper end of the detector 1 is fixed to the base.

The detector 1 comprises a pair of a light projecting section 2 and a light receiving section 3. The light projecting section 2 and the light receiving section 3 are arranged under the object 5 to be measured.
Predetermined angles α1, α2 with respect to the length direction of 5 (α1 ≈ α2)
Is provided. The light projecting unit 2 is provided with a laser light source and an optical system, and the measurement beam B of the laser light is emitted to the object 55 to be measured at the predetermined angle α1. Further, the light receiving section 3 is provided with an optical system and a light receiving element,
The measurement beam B reflected by the DUT 55 at a predetermined angle α2 is detected by this light receiving element.

The measurement beam B of the light projecting section 2 has a predetermined range L1 along the plate width direction of the object 55 to be measured. The measurement beam B has a predetermined width L1 and is sequentially scanned.

When the measuring beam B is emitted from the light projecting section 2 of the detector 1 to the object 55 to be measured with the above-mentioned structure, the measuring beam B having a predetermined width L1 is projected onto the object 55 to be measured and a portion to be projected onto the object 55 to be measured. Some parts are not illuminated. Therefore, in the light receiving unit 3,
The reflected light of the measurement beam B that scans the position where the DUT 55 is present is received.

As described above, the predetermined width L with respect to the object 55 to be measured.
It is possible to detect the plate width W of the DUT 55 by emitting the measurement beam B of No. 1 and the range of the reflected light. Specifically, the detection signal of the light receiving unit 3 is input to the calculation unit, and the calculation unit outputs a plate width signal according to the range of the reflected light. Also,
Since the measurement beam B is obliquely emitted at a predetermined angle α1, even when the DUT 55 is a transparent body such as glass, the plate width is always highly accurately irrespective of the amount of reflected light. Can be detected.

Next, FIG. 2 is a perspective view showing the configuration of a second embodiment of the non-contact plate width measuring device of the present invention, FIG. 3 is the same front view, and FIG. 4 is the same side view. In the apparatus of this embodiment, the detectors 1 and 5 are separately installed at both ends on one surface side of the object to be measured 55 as a plate-like object. DUT 55
Has a shape elongated in the direction of arrow A in the figure, and is fixed to the illustrated position or conveyed in the direction A. In the detectors 1 and 5, the angles 10 at the upper ends are the bases 12a and 1 shown in FIG. 3, respectively.
2b, and the bases 12a and 12b are
It is slidable in the direction of each other. Substrates 12a, 12b
The relative distance of is detected by an external distance measuring device and is output to the arithmetic unit 30 described later.

The detector 1 is composed of a pair of a light projecting section 2 and a light receiving section 3, and the detector 5 also has a similar light projecting section 6 and a light receiving section 7. Explaining from the detector 1 side, the light projecting section 2 and the light receiving section 3 have predetermined angles α1, α2 (α1≈α2) with respect to the length direction of the DUT 55 as shown in FIG. It is provided. The light projecting unit 2 is provided with a laser light source and an optical system, and the measurement beam B of the laser light is emitted to the object 55 to be measured at the predetermined angle α1. The light receiving section 3 is provided with an optical system and a light receiving element.
The measuring beam B reflected at a predetermined angle α2 by 5 is detected by this light receiving element.

As shown in FIGS. 2 and 3, the measurement beam B of the light projecting section 2 has a predetermined range L2 along the plate width direction of the object 55 to be measured. The measurement beam B has a predetermined width L2 and is sequentially scanned. The measurement state detected by the light receiving element of the light receiving unit 3 is output to the arithmetic unit 30. It should be noted that one scanning side (long plate width direction; B + side) is an addition signal, and the other scanning side (short plate width direction; B− side) is a subtraction signal with the center portion B0 in the scanning direction as a boundary. Has been done.

FIG. 5 is a block diagram showing the arithmetic unit 30. The interval between the detectors 1 and 5 is measured by an interval measuring device 25 such as a linear scale, and the interval signal S is sent to the plate width calculating means 33.
1 is output. Further, the measurement state of the light receiving portion 3 of the detector 1 is input to the plate edge detecting means 31, and similarly, the measurement state of the light receiving portion 7 of the detector 5 is input to the plate edge detecting means 31. The plate edge detection means 31 and 32 detect the plate edge of the object 55 to be measured, and the plate edge detection signals S2a and S2b are output to the plate width calculation means 33. The plate width calculating means 33, based on the interval signal S1 from the interval measuring device 25, detects both plate edge detecting means 31,
The plate width W of the DUT 55 is calculated by adding the plate edge detection signals S2a and S2b of 32, and the plate width signal S3 is output.

The operation of the above-described structure will be described. In these detectors 1 and 5, the substantially central portion of each measuring beam B, that is, the scanning central portion B0 of the measuring beam B is measured as shown in FIGS. The bases 12a and 12b are slid and roughly positioned so that they are positioned at the widthwise ends of the object 55.

In this state, the detector 1,
When the measurement beam B is emitted from the light projecting portions 2 and 6 of 5, the measurement beam B having a predetermined width L2 is divided into a portion projected on the DUT 55 and a portion not projected. Occurs. Therefore, in the light receiving portions 3 and 7, only the measurement beam B that scans the portion corresponding to the plate edge of the DUT 55 is received and output to the plate edge detecting means 31 and 32.

Therefore, the plate edge detecting means 31 and 32 detect up to which range the scanning signal output from the light receiving portions 3 and 7 indicating the measurement state is output. For example, when the measurement state is detected from the B- portion on the inner side of the measurement beam B to the scanning center portion B0, the plate edge is detected as the B0 portion. In addition, in the case of detecting from the B− portion on the inner side of the measurement beam B to a predetermined portion on the B + side in the plate edge direction,
The plate edge is detected as the B + part. In this way, the plate edge detecting means 31, 32 detect the plate edge of the DUT 55 based on the measurement beam B to be scanned.

Then, the plate width calculating means 33 outputs the interval signal S1 of the detectors 1 and 5 detected by the interval measuring device 25 to
Plate edge detection signals S2a, S2b of the plate edge detection means 31, 32
Is added to calculate the plate width W of the DUT 55, and the plate width signal S3 is output. Specifically, the plate edge detection means 31, 32
When the plate edge is B0, the plate width signal S3 is the interval signal S1.
Will only be. Further, the plate edge is detected by the plate edge detecting means 31 and 32.
When it is displaced outward from 0 (the direction in which the plate width is long), the plate edge detection signals S2a and S2b are added to the interval signal S1, and the plate edge detection means 31 and 32 move the plate edge inward from B0 (plate When the width is deviated, the plate edge detection signals S2a and S2b are subtracted from the interval signal S1.

When the plate width changes due to the object to be measured 55 being conveyed, the plate edge detection signals S2a, S2 are detected.
2b changes, and the plate width signal S3 changes accordingly.
When only one plate edge changes, only one of the corresponding plate edge detection signals S2a and S2b changes.

As described above, the plate width of the DUT 55 is detected in a state where the interval signal indicating the interval between the detectors 1 and 5 is coarse,
The plate width W can be detected with high accuracy only by adding the increase or decrease of the plate edge range detected by the detectors 1 and 5.

Further, since the measurement beam B having a predetermined width L2 is emitted to the object to be measured 55 and the plate edge is detected by the range of the reflected light, the object to be measured 55 is a transparent body such as glass. Even in such a case, the plate edge can always be detected with high accuracy and the plate width can be obtained regardless of the amount of reflected light.

In the second embodiment, the detectors 1 and 5 are provided at both ends of the object to be measured 55, but the object 55 to be measured is fixed with one end positioned.
Alternatively, it may be configured to be transported. In this case,
The plate width can be similarly detected by disposing the detector 1 only at the other end. In addition, in the second embodiment, the distance between the detectors 1 and 5 at both ends of the DUT 55 is set to the distance measuring device 2
Although it was configured to measure in 5, instead of this interval measuring device,
The interval signal S1 corresponding to the interval between the detectors 1 and 5 may be stored in advance in a storage unit (not shown) or the like and input to the plate width calculating means 33. In this case as well, the same operation as in the above embodiment is performed. The effect can be obtained. Similarly, when the distance between the detectors 1 and 5 is fixed, the distance measuring device 25 can be omitted.

[0025]

According to the present invention, since the light projecting portion and the light receiving portion are provided at the end portions of one surface of the measured object, the width of the measured object can be detected. Accordingly, the existing position and the end position of the plate in the width direction can be detected regardless of the length of the plate width of the object to be measured, and the plate width of the object to be measured can be easily and highly accurately obtained. In addition, since the measurement beam having a predetermined width is obliquely emitted from the light projecting unit and the plate width of the measurement target is detected by the width of the measurement beam reflected by the measurement target, the measurement target is a transparent object. Even in this case, the plate width can be easily obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a non-contact plate width measuring device of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the non-contact plate width measuring device of the present invention.

FIG. 3 is a front view of the device.

FIG. 4 is a side view of the device.

FIG. 5 is a block diagram showing a calculation unit of the apparatus.

FIG. 6 is a perspective view showing a conventional outer diameter measuring device.

[Explanation of symbols]

1, 5 ... Detector, 2, 6 ... Light emitting part, 3, 7 ... Light receiving part, 2
5 ... Interval measuring device, 30 ... Calculation part, 31, 32 ... Plate edge detecting means, 33 ... Plate width calculating means, 55 ... Object to be measured, B ... Measuring beam.

Claims (1)

[Claims] 1. A device under test (55) having a predetermined width (W).
Is a non-contact optical plate width measuring device, which is arranged at an end of one surface of the object to be measured and has a predetermined angle (α1) with respect to the object to be measured, and the object to be measured. A light projecting portion (2) having a predetermined width (L1) in the width direction and emitting a measurement beam (B); and provided on one surface of the DUT and on the same surface as the light projecting portion. A light receiving section (3) for receiving the measurement beam reflected by the object to be measured among the measurement beams emitted from the light projecting section.
And a calculation unit (3) that detects the plate edge of the object to be measured based on the light receiving state of the measurement beam by the light receiving unit and calculates the plate width of the object to be measured.
0) and a non-contact plate width measuring device.