JP3499076B2 - Non-contact dimension measuring device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display of an apparatus for measuring an external dimension and a wire diameter of an object to be measured in a non-contact manner using laser light or white light. It is about. 2. Description of the Related Art Conventional non-contact dimension measuring apparatuses include those shown in FIGS. 5 to 8, and are mostly constituted by a detecting section and a display section. FIG. 5 schematically shows the detection unit 51. The detection unit 51 includes a left and right units mounted on a substrate 52 and a hollow portion 53 at the center.
Are formed, and the light projecting unit 54 is provided in one unit, and the light receiving unit 55 is provided in the other unit.
And are arranged in opposition. The light projecting part 54 includes a hollow part 53.
Light is emitted from a light source 58 to an object to be measured 57 (for example, a continuous object such as an electric wire or an optical fiber) placed in a measurement area 56, and scanned by a deflector 59 to form a lens 60.
The light receiving unit 55 forms a spot image on the light receiver 62 through the lens 61 by using the received parallel light, and outputs an electric signal corresponding to the movement of the image from the light receiver 62. Output. FIG. 6 shows a display unit 63 for calculating the external dimensions and wire diameter of the device under test 57 or displaying the position of the device under test 57 by calculating based on the electric signal output from the detection unit 51. , A bar graph display is used for the position display. The display unit 63 mainly includes a numerical value display unit 64 for displaying the external dimensions and wire diameter of the device under test 57 and a position display unit 65 for displaying the position of the device under test 57. It is used to see the relative positional relationship between the and the detection unit 51. The electric signal output from the detection unit 51 is calculated and corrected by the display unit 63, and is represented as a dimension value and a position display of the device under test 57. The position display section 65 includes a plurality of LEDs 6
6 are arranged side by side.
LED 66 in a positional relationship corresponding to the shaded portion of
a is lit. The position where the device under test 57 is located above and below the detection unit 51 is indicated by the lit portion of the LED 66. FIGS. 7 and 8 show a matrix display. FIG. 7 shows a detection section, and FIG. 8 shows a display section. The position of the object to be measured in the detection section is determined by the portion where the LED is turned on. Is shown. In this case, a notch 68 is provided in the upper center of the detecting section 67, and a rhombic hollow portion 69 is provided continuously with the notch 68. The light projecting units 70 and 71 and the light receiving units 72 and 7 are positioned on opposite sides (X and Y) of the rhombus.
3 are provided facing each other. DUT 74
Is placed in the measurement area 75 of the hollow part 69 between the light emitting parts 70, 71 and the light receiving parts 72, 73, and the light receiving parts 72, 7
At 3, the presence or absence of light reception is determined, and an electric signal is output. The display unit 76 mainly includes a numerical value display unit 77 that displays the dimensions and the like of the DUT 74 and a position display unit 78 that displays the position of the DUT 74. The position display section 78 has a plurality of LEDs.
79 (5 × 5 in this case) are arranged vertically and horizontally in a matrix, and the position is calculated based on the electric signal output from the detection unit 67, so that a positional relationship corresponding to the position of the DUT 74 in the detection unit 67 is obtained. A certain LED 79a is turned on. In short, the location where the LED is lit indicates the position of the DUT. However, in the conventional non-contact dimension measuring device, it is difficult to understand the relative positional relationship between the object to be measured and the detecting section. 7 and 8, that is, the arrangement of the LEDs 79 of the display unit 76 is different from the shape of the detection unit 67 and the positions of the light emitting and receiving devices 70 to 73 that are actually visible. And the position shown on the display unit 75 gives a sense of discomfort. In addition, when the installation direction of the detection unit 67 changes, the display on the position display unit 78 of the display unit 76 does not correspond to the measurement area 75 of the detection unit 67 at all, and therefore, the initial position setting of the DUT 74 is set. At times, there was a problem that it was difficult to match. Accordingly, it is an object of the present invention to provide a non-contact dimension measuring apparatus in which the shape of a measurement area of a detection unit is displayed on a display unit as it is so that the positional relationship of the object to be measured in the detection unit can be understood at a glance. [0006] The non-contact dimension measuring device includes a detecting unit 2 and a display unit 18. DUT 2
The detecting unit 2 for measuring the size and position of 4 is provided with a light projecting unit 8 for projecting light to an object to be measured, and is separated from the hollow portion 5 including a measuring area 23 for placing the object to be measured. A light receiving unit 9 is provided opposite to the light projecting unit and receives light from the light projecting unit. The light receiving unit 9 converts the light into an electric signal and outputs the electric signal. The display unit that receives the electric signal from the detection unit and displays the size and position of the device under test has a numerical value display unit that displays the size of the device under test and a position display unit 22. The section displays a contour of the shape of the measurement area of the detection section, and a light emitting section 26 for two-dimensionally displaying the position of the device under test in the area of the measurement area is arranged in the contour. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view schematically showing a detection unit according to an embodiment of the present invention, FIG. 2 is a front view of a display unit according to an embodiment of the present invention, and FIG.
FIG. 4 is a perspective view showing a use state of the detection unit. The non-contact dimension measuring device 1 includes a detection unit 2 and a display unit 18. The structure of the detection unit 2 will be described in detail. In this embodiment, light is projected on the object 24 from three directions. When viewed from the front of the detection unit 2 in FIG.
A cutout 4 is provided on the right lateral surface of the housing 3, and a substantially octagonal hollow portion 5 is formed continuously with the cutout 4. Windows 6 and 7 for transmitting light are provided on each side of the substantially octagonal hollow portion 5 in the vertical direction, the leftward upward direction, and the rightward upward direction, and the light projecting portion 8 and the light receiving portion 9 are provided with these windows 6, 7 respectively. Are disposed to face each other with the interposition of. The light projecting unit 7 includes one light source 10, one deflector 11, one lens 12, and two half mirrors 13 and 14, and a mirror 15 is provided in each of the three directions. In this case, one light source is commonly used to emit light in three directions.
Light sources may be provided in each of the three directions. The light receiving section 9 includes a lens 16 and a light receiver 17 in all three directions. The display section 18 mainly includes a housing 19 and a front panel 2.
0. As shown in FIGS. 2 and 3, the front panel 20 includes a numerical value display unit 21, a position display unit 22, and an operation unit (not shown).
The position of the DUT 24 in the measurement area 23 of the hollow portion 5 of the detection unit 2 is set so as to form a 5 × 5 matrix array, and the 5 × 5 light emitting unit 26 of the LED 25 mounted inside the housing is They are arranged to show corresponding positions. A print sheet 27 is attached to the front panel 20, and a light transmitting portion 28 having a transparent portion that transmits light is provided at a portion of the LED 25 where the 5 × 5 light emitting portion 26 looks, and a light transmitting portion 28 is provided. Around the periphery, the shape of the detection unit 2 is represented as it is, that is, the outline of the notch 4 and the hollow part 5 is represented by printing as it is. Measurement area 23 is 3
Although the light in the directions is a hexagon intersecting, the actually measurable range is a circle inscribed in the hexagon. Therefore, the light emitters 26 arranged in a matrix on the position display section 21 are octagonal, and four of each corner in the 5 × 5 arrangement are omitted. The matrix arrangement is an octagon in the present embodiment, but may be other polygons, squares, rectangles, or circles, and may be in any form in consideration of the arrangement of the light receiver and the arrangement of the LEDs. In the present embodiment, the LEDs 25 are formed integrally with the light emitting portions 26 arranged in a matrix, but there is also a method in which each LED is arranged in a matrix on the panel surface. It is also possible to display the same on a liquid crystal screen or a CRT screen. Next, the operation will be described. First, the light emitted from the light source 10 of the detection unit 2 is scanned to a certain width by the deflector 11 and becomes parallel light through the lens 12,
The light is branched in two directions by a half mirror 13, and one of the light beams is branched in two directions by a half mirror 14.
Light is emitted in a total of three directions. The parallel light in three directions is
5 passes through each window 6 of the hollow portion 5, passes through each window 7 on the opposite side, and enters the light receiving unit 9. When the DUT 24 is disposed in the hollow portion 5, each light receiving unit 9 detects a portion shielded by the DUT 24 and outputs an electric signal. The output signal is calculated and corrected by the display unit 18, and the dimensions of the DUT 24 are numerically displayed.
The position is set to one of the LEDs 25 arranged in a matrix.
This is indicated by turning on the light-emitting portions 26 at several places. That is, if the DUT 24 is located at the center of the measurement area 23,
The central light emitter 26a is turned on.
The light emitters b and 26c light up. In this way, when the position of the DUT 24 is set, the desired LED 2 is set while visually checking the display state of the position display unit 22 of the display unit 18.
The detection is performed by moving the detection unit 2 so that the light emitting unit 26 of No. 5 is turned on. As described above, according to the non-contact dimension measuring apparatus of the present invention, the profile of the cross-sectional shape of the detection unit is displayed on the position display unit while the shape of the detection unit is viewed as it is. Express,
Since the light emitting unit for two-dimensionally displaying the position of the DUT in the area of the measurement area is arranged in this contour,
The position information can be grasped intuitively, and at the time of initial setting of the position of the object to be measured, the position of the detection unit can be easily moved while visually checking the lighting state of the light emitting unit of the position display unit. Position setting can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment of a detection unit of the present invention. FIG. 2 is a front view showing one embodiment of a display unit of the present invention. FIG. 3 is a cross-sectional view taken along line AA of the display unit of the present invention. FIG. 4 is a perspective view showing a use state of the detection unit of the present invention. FIG. 5 is a front view showing a conventional detection unit. FIG. 6 is a front view showing a display unit of a conventional example. FIG. 7 is a front view showing a conventional detection unit. FIG. 8 is a front view showing a display unit of a conventional example. [Explanation of Signs] 1 ... Non-contact dimension measuring device, 2 ... Detector, 3 ... Housing, 4 ...
Notch, 5 ... hollow, 6, 7 ... window, 8 ... light emitting, 9 ... light receiving, 18 ... display, 19 ... housing, 20 ... front panel,
21 Numerical display unit, 22 Position display unit, 23 Measurement area, 24 DUT, 25 LED, 26 Light emitting unit, 2
7 ... Printed sheet, 28 ... Light transmitting part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01B 11/00-11/30 G01B 21/00 G01D 7/00

Claims (1)

(57) Claims 1. A light projecting unit (8) for projecting light to an object to be measured (24), and a measurement area (23) for disposing the object to be measured. A detecting unit (2) that is provided opposite to the light projecting unit with a hollow part (5) interposed therebetween and has a light receiving unit (9) that receives light from the light projecting unit and outputs a signal; In a non-contact dimension measuring device provided with a display unit (18) for displaying a size and a position of the object to be measured in response to a signal from a detection unit, the outline of a hollow portion of the detection unit is displayed on the display unit. A position display unit (22) is provided, in which a light-emitting unit (26) for displaying and two-dimensionally displaying the position of the device under test in the area of the measurement area is arranged in the outline. Non-contact dimension measuring device.