JPH04326003A - Monitor appratus for noncontact displacement meter - Google Patents

Abstract

PURPOSE:To enable the rotation of a screen of a video monitor centered on a measuring point in a monitor apparatus of measuring points to be applied to a noncontact displacement meter. CONSTITUTION:A circular guide hole 15 is formed on a mounting block 14 provided in a monitor apparatus 6. A CCD camera 7 is inserted into the guide hole 15 in such a manner as to be rotatable centered on an optical axis. The center of a photographing surface of the CCD camera is made to coincide with a measuring point beforehand. As the CCD camera 7 is turned along the guide hole 15, a screen rotates around the measuring point on a video monitor connected to the CCD camera.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor device that is installed in a non-contact displacement meter that optically measures the displacement of a measurement object in a non-contact manner and is capable of visually confirming an image of a measurement point.

0002

[Prior Art] A non-contact displacement meter is known that focuses reflected light from a measurement object onto a position sensor and measures the displacement of the measurement object using an electric signal obtained in accordance with the movement of the focusing point. ing. This type of displacement meter is sometimes equipped with a monitor device that magnifies and displays the measurement point, and this monitor device allows the measurer to adjust the measurement position while visually confirming the measurement point.

0003

[Problem to be Solved by the Invention] According to conventional monitor devices, depending on the usage or installation conditions of the device, the actual orientation of the object to be measured with respect to the measurer may not match the orientation of the image on the monitor screen. There is. For example, if the top and bottom of the measurement target displayed on the monitor screen do not match the top and bottom of the actual measurement target in front of the measurer, the position of the special point on the measurement target may be matched to the measurement point while looking at the monitor. This makes it difficult to monitor and makes the monitoring device extremely difficult to use.

0004

[Means for Solving the Problems] The non-contact displacement meter monitor device of the present invention is applied to a non-contact displacement meter that optically measures the displacement of a measurement object in a non-contact manner, and captures an image of a measurement point of the measurement object. and a monitor unit that displays the measurement point imaged by the imaging unit, and is configured such that the image on the monitor unit can rotate freely around the measurement point. There is.

[0005]

[Operation] If the direction of the measurement target that the measurer actually sees does not match the direction of the image seen on the monitor, you can rotate the monitor screen around the measurement point displayed on the monitor. It is possible to match the image and reality.

[0006]

Embodiment A first embodiment will be explained with reference to FIGS. 1 to 3. A non-contact displacement meter (hereinafter referred to as a displacement meter) includes a sensor head section 1 and a measuring device main body (not shown). Although details are not shown, this sensor head section 1 has a built-in laser diode, position sensor, etc., and the light from the laser diode is directed obliquely from the light projecting section 2 toward the measurement target 4 via a condensing lens etc. incident. The light reflected at the measurement point 5 on the measurement object 4 is condensed onto the position sensor via the light receiving section 3.

A non-contact displacement meter monitor device 6 (hereinafter referred to as monitor device 6) is attached to the sensor head section 1. This monitor device 6 photographs a measuring point 5 of a measuring object 4 that reflects light from the sensor head section 1 with a CCD camera 7 serving as an imaging section, and enlarges and displays the photograph on a video monitor serving as a monitoring section. It is a device that starts the process.

As shown in FIG. 1, the monitor device 6 attached to the sensor head section 1 has a CCD camera 7 as an imaging section inside a box-shaped cover 8. Further, a light guide tube 9 is provided protruding from the tip of the cover 8 on the sensor head section 1 side. The introduction hole 10 is located between the light emitting/receiving sections 2 and 3 of the sensor head section 1, and faces the measurement point 5 of the measurement object 4. Furthermore, reflecting mirrors 11 and 12 are provided inside the introduction hole 10 of the guide tube 9 and the cover 8 at appropriate angles so that the reflected light from the measurement point 5 is guided to the CCD camera 7. It has become.

As shown in FIGS. 2 and 3, a monitor device 6
Inside the cover 8, a rectangular board 13 and a mounting block 14 are provided. The substrate 13 is used to mount various optical components, etc., which will be described later. The mounting block 14 has a guide hole 15 in the center, and a CCD camera 7 is inserted into the guide hole 15 so as to be rotatable about the optical axis. The mounting block 14 has the guide hole 15
Two screw holes 16 are formed to communicate with the outside of the cover 8, and each of these screw holes 16 is provided with a push screw 17 for fixing the posture of the CCD camera 7.

According to the above configuration, the light emitted from the light projecting section 2 of the sensor head section 1 is reflected at the measurement point 5 on the measurement object 4 and returns to the light receiving section 3. The sensor head unit 1 outputs a signal according to the position of the reflected light received on the position sensor,
A measuring device main body (not shown) calculates the amount of displacement according to this signal.

A part of the light diffusely reflected at the measurement point 5 is guided to the CCD camera 7 of the monitor device 6 through the introduction hole 10 of the guide tube 9 located directly above the measurement point 5. This allows CC
The measurement object 4 is displayed on a video monitor connected to the D camera 7, and the measurement point 5 in particular appears as a light spot in the center of the monitor screen.

[0012] If the orientation of the measurement object 4 actually viewed by the measurer and the orientation of the measurement object 4 displayed on the video monitor do not match, tasks such as positioning the measurement points 5 will become complicated, and the monitor device 6 cannot be fully utilized. In such a case, by loosening the push screw 17 and rotating the CCD camera 7 by an arbitrary angle, the screen of the video monitor can be rotated by an arbitrary angle around the light spot of the measurement point 5 and fixed again. . Through this operation, the actual orientation of the measuring object 4 for the measuring person can be matched with the image on the video monitor.

Next, a second embodiment will be explained with reference to FIGS. 4 and 5. First, in the first embodiment described above, the object to be measured 4 has a surface condition that causes diffused reflection, and the measurement point 5 can be identified as a light spot. However, if the surface of the measurement target is a mirror surface, the light from the sensor head section 1 is totally reflected and almost 100% returns to the sensor head section 1, and almost no light enters the monitor device 6 from the measurement point. . Therefore, with the apparatus of the first embodiment, the measurement point cannot be visually recognized on the video monitor. Therefore, in this embodiment, the position of the measurement point is displayed by placing a cursor at the position of the measurement point.

That is, as shown in FIG. 4, a lens 21 and a cursor plate 22 are provided on the substrate 13 of the monitor device 20 of this embodiment in front of the imaging surface 7a of the CCD camera 7. As shown in FIG. 5, the cursor board 22 is a transparent rectangular board with a cross-shaped cursor 23 provided thereon. The cursor 23 of this cursor board 22 is
The focal point is focused on the imaging surface 7a of the CCD camera 7, and its position is configured to coincide with the position of the measurement point 5. Note that the other configurations of the monitor device 20 and the sensor head section 1 are the same as in the first embodiment.

According to the above configuration, even if the measurement point 5 is not visible as a light spot on the object to be measured, the measurement point 5 can be confirmed by the position of the cursor 23 on the video monitor. Further, when the CCD camera 7 is rotated, the screen on the video monitor is rotated around the cursor 23 (ie, the measurement point 5).

In the third embodiment shown in FIG. 6, a cursor board 22 is directly attached to the imaging surface 7a of the CCD camera 7. With this structure as well, the same functions and effects as in the second embodiment can be obtained. The rotation mechanism etc. of the CCD camera 7 are the same as in the first embodiment.

The fourth embodiment shown in FIG. 7 is an example of a configuration in which a cursor is displayed without using a cursor board. CCD
The signal from the camera 7 is processed by a control unit 30 and a cursor generator 3 generates a cursor display signal.
1 to the video monitor 32. This embodiment also provides the same effects and effects as the second embodiment. The rotation mechanism etc. of the CCD camera 7 are the same as in the first embodiment.

Although the cursor 23 in the second to fourth embodiments was cross-shaped, FIGS. 8 and 9 show other forms of the cursor displayed on the video monitor 32.

In each of the embodiments described above, the CCD camera itself is rotated in order to rotate the monitor screen around the measurement point that is visible on the video monitor as a light spot or the cursor that indicates the measurement point on the video monitor. I made it possible to do so. In addition, the means for rotating the monitor screen around the measurement point may be, for example, a method of electrically processing a video signal applied to a video monitor, or the video monitor itself may be rotated.

[0020]

[Effects of the Invention] According to the present invention, in the measurement point monitoring device installed in a non-contact displacement meter, the monitor screen can be rotated around the measurement point, so that the orientation of the measurement target and the actual object on the monitor screen can be changed. This makes it easier to match the numbers and makes the device easier to use.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a first embodiment.

FIG. 2 is a partially cutaway plan view of the monitor device of the first embodiment.

FIG. 3 is a left side view of the monitor device of the first embodiment in FIG. 2;

FIG. 4 is a diagram showing main parts of a second embodiment.

FIG. 5 is a diagram showing a cursor board in a second embodiment.

FIG. 6 is a diagram showing main parts of a third embodiment.

FIG. 7 is a block diagram showing a fourth embodiment.

FIG. 8 is a diagram showing another aspect of cursor display.

FIG. 9 is a diagram showing another aspect of cursor display.

[Explanation of symbols]

4 Measurement object 5 Measurement points 6, 20 Monitor device for non-contact displacement meter (monitor device)
7 CCD camera as an imaging unit

Claims (1)

[Claims] 1. Applicable to a non-contact displacement meter that optically measures displacement of a measurement target in a non-contact manner, the sensor comprises an imaging unit that captures an image of a measurement point of the measurement target, and an imaging unit that images the measurement point captured by the imaging unit. What is claimed is: 1. A non-contact displacement meter monitor device comprising a monitor section, wherein an image of the monitor section is configured to be freely rotatable around the measurement point.