JPS62245109A - Three-dimensional measuring apparatus - Google Patents

Abstract

PURPOSE:To prevent the adverse effect of noise or the like, by using an optical fiber as a signal transmitting medium between a probe and the operation part of a control unit. CONSTITUTION:A probe 25 is mounted to the leading end part of a spindle 19 through an adaptor 23 in a detachable manner. One end of an optical fiber 27 is connected to the upper end part of the probe 25 through a device optically converting an electrical signal and the fiber 27 passes through the adaptor 23, the spindle 19 and a central carriage 17. Further, the fiber 27 passes through the cable channel 29 mounted to the right side surface of a machine base 3 so as to extend to an X-axis direction through the upper surface of the upper beam U of a main carriage 9 and the right side surface of the carriage 9 and extends to the rear part in the X-axis direction to be connected to a control part 31 through an apparatus converting an optical signal to an electrical signal. In the wiring of the fiber 27, the excessive bending of the fiber 27 is prevented. By this mechanism, the probe 25 is brought into contact with an article to be measured and a touch signal rises to be transmitted to the control part 31 but accurate transmission can be performed without being under the effect of noise.

Description

Detailed Description of the Invention (Field of Work Application) The present invention relates to a three-dimensional measuring device, and more specifically, the present invention relates to a three-dimensional measuring device, and more specifically, an optical fiber is used to connect a probe provided at the tip of a spindle in the three-dimensional measuring device and a control device. This relates to a three-dimensional measuring device connected with

[Conventional technology]

Conventionally, when a probe provided at the tip of a spindle in a three-dimensional measuring apparatus comes into contact with an object to be measured, a contact point is mechanically opened, crosses a threshold level, and opens while causing chattering.

The moment this threshold level is crossed, a touch signal is sent to the calculation section of the control device to read the position of the scale. At this time, the distance from the probe to the calculation unit is about 10+, which is very long and receives various noises.

[Problem that the invention seeks to solve]

However, since the touch signal from the pump is subjected to various noises while reaching the calculation section of the control section,
If the level of this noise is large even momentarily, it may cross the threshold level and cause the scale to be read incorrectly as if the probe had touched the object to be measured. Furthermore, if this phenomenon occurs immediately before the probe touches the object to be measured, it is impossible to determine whether it is due to noise or a true measurement. That is,
Problems such as variations in measurement data or output of data that is out of digits from the true data are likely to occur. Especially when measuring near machines that generate noise such as electric discharge machines,
Many problems occur when power is supplied from the same line as those machines.

SUMMARY OF THE INVENTION An object of the present invention was proposed in order to solve the problem in view of the above-mentioned circumstances. The present invention provides a three-dimensional measuring device that is not affected.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a three-dimensional measuring device with a probe for measuring an object, and converts an electrical signal provided in the probe into an optical signal. one of the optical fibers is connected to a first conversion device that converts the optical signal into an electrical signal, and the other side of the optical fiber is connected to a second conversion device that converts the optical signal into an electrical signal. The device is characterized in that it is connected to the control device via the controller.

(Function) By adopting the present invention, when the touch probe contacts the object to be measured and the touch signal is transmitted to the calculation unit of the control device, a correct signal is transmitted regardless of the adverse effects such as noise. .

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Referring to FIG. 1, a machine base 3 in a three-dimensional measuring device 1 is installed on a floor or the like. Racks 5.7 serving as guide rails are provided on both sides of the machine base 3 and extend in the X-axis direction. A main carriage 9 is provided above the machine base 3 and is movable in the X-axis direction. Sliding guide members 11 and 13, which are integrated with the main carriage 9, are formed at the lower portions of both sides of the main carriage 9, and binions (not shown) are provided inside the slide guide members 11 and 13, respectively.

Its pinion meshes with said rack 5.7, and the main carriage 9 is moved relative to the machine base 1 in the X-axis direction.

At the front part of the upper beam 9U of the main carriage 9, there is a Y
An axially extending sleeve 15 is provided. Rack 15
A central carriage 17 incorporating a pinion (not shown) meshed with the central carriage 17 is provided on the upper beam 9U of the main carriage 9 so as to be movable in the Y-axis direction.

With the above configuration, the central carriage 17 is moved in the Y-axis direction with respect to the upper beam 9U of the main carriage 9.

The central carriage 17 is provided with a spindle 19 that is movable in the Z-axis direction. The spindle 19 is provided with a rack 21 extending in the Z-axis direction, and a binion (not shown) meshes with the rack 21.

With the above configuration, the spindle 19 is moved in the Z-axis direction with respect to the central carriage 17.

A probe 25 is removably attached to the tip of the spindle 19 via an adapter 23.

In FIG. 1, the upper end of the probe 25 is connected to one side of an optical fiber 27 via a first conversion device that optically converts an electrical signal.
As can be clearly seen in the figure, it is shown in thick black lines and passes through the interior of the adapter 23, the spindle 19 and the central carriage 17. Furthermore, it passes through the upper surface of the upper beam 9U of the main carriage 9 and the right side of the main carriage 9, and extends in the X-axis direction to the right side of the machine base 3 via a cable channel 29 that is attached to the X-axis direction. It extends to the rear part. The other end of the optical fiber 27 is connected to a control unit 31 indicated by a two-dot chain line via a second conversion device that converts an optical signal into an electrical signal.
connected to.

The optical fiber 27 is connected to the spindle 19. When wiring to the central carriage 17, main carriage 9, etc., do not bend the wiring excessively.

With the above configuration, when the probe 25 comes into contact with the object to be measured, a touch signal is generated and transmitted to the control unit 31, but the touch signal is not affected by noise and is transmitted accurately and without any malfunction.

〔effect〕

As can be understood from the above description of the embodiments, according to the present invention, since the probe and the control unit are connected by an optical fiber, when the probe comes into contact with the object to be measured, the touch signal is transmitted from the outside. control wJ without being affected by the noise of
sent to the department. Therefore, since no erroneous signals are generated due to malfunctions due to noise, accurate measurement positions can be measured and reliable measurement data can be obtained.

By using optical fiber, the cable can be made thinner and spring bags are eliminated.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing three-dimensional measurement according to the present invention. [Explanation of symbols representing main parts of drawings] 1...3D measuring device, 3...Machine base, 9...
・Main carriage, 17... Central carriage, 19... Spindle, 25... Probe, 27.
・Optical fiber

Claims (1)

[Claims] A three-dimensional measuring device is provided with a probe for measuring an object to be measured, one of the optical fibers is connected to a first conversion device provided on the probe that converts an electrical signal into an optical signal, and the optical fiber is connected to a Z-axis, A three-dimensional measurement device characterized in that the other of the optical fibers is connected to a control device through a second conversion device that converts an optical signal into an electrical signal through the Y-axis and the X-axis.