JPH0626851A - Rotation-synchronizing type non-contact apparatus for measuring displacement of rotary shaft and display system thereof - Google Patents

Abstract

PURPOSE:To make it possible to perform measurement at an actually used rotating speed by specifying the detecting place of displacement in synchronization with rotation on the circumference of a rotary shaft, and shortening the detecting time. CONSTITUTION:A displacement measuring apparatus is constituted of a rotary shaft 4, wherein a rotating-position detecting element whose phase is shifted by 180 degrees is assembled, and a detector main body 1, wherein a rotating-position detecting sensor 3 and a displacement detecting sensor 2 are assembled. In measurement, the rotary shaft 4 is inserted until the element 5 agrees with the sensor 3. When the rotary shaft 4 is rotated by one time under this state, the sensor 3 detects the position of the element 5 during the rotation of the half time. The sensor 2 detects the displacement of the rotary shaft 2 based on the signal. The displacement, wherein the phase is shifted by 180 degrees from the initial half rotation, is detected during the remaining half rotation. The detected displacement is sent into an electronic computer. After the samplings of the required number of times, the maximum displacement amount and the direction of the displacement are computed and displayed. Thus, the measurement at the high speed rotation can be measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation synchronous non-contact type rotary shaft displacement measuring device.

[0002]

2. Description of the Related Art Conventionally, a contact type micro-displacement reading instrument such as a dial gauge is attached to a rotary shaft, the rotary shaft is rotated slowly or manually, and the measured values are continuously observed over the entire circumference of the mating hole, and the maximum and minimum values are measured. It is a method of reading the displacement of and calculating the deviation between the rotation axis and the hole. For this reason, for example, even if the rotating shaft is deviated due to heat generation of the bearing generated at the actually used rotation speed, the deviation cannot be detected, or the displacement is displayed continuously, so that it is difficult to read at a high rotation speed. Therefore, the rotation speed cannot be increased, and it takes time to measure a sufficient number of sampling with high reliability.

[0003]

SUMMARY OF THE INVENTION According to the present invention, the detection time is shortened by specifying the location of displacement (bias) detection on the circumference of the rotation axis in synchronization with the rotation, and the measurement is performed at the actually used rotation speed. The present invention provides a rotary axis displacement measuring device and a display system for the same, which eliminates the reading error during repeated detection.

[0004]

[Means for solving the problem] A rotation position detection sensor having a rotation position detection element incorporated in a rotation shaft detects a specific position during one rotation and outputs a signal. The displacement at a specific position on the circumference is detected and sent to an electronic computer, and when the number of sampling times statistically required is reached, the maximum displacement amount (bias) and its position (angle) are obtained and displayed by the electronic computer.

[0005]

When the rotary shaft is rotated once during measurement, the rotary position sensor detects the position of the element while the rotary shaft makes a half rotation, and the displacement detection sensor detects the displacement of the rotary shaft based on the signal. The remaining half rotations also detect the displacement in the same manner. The maximum displacement amount and its displacement direction are calculated from the displacements detected at these two points, and the result is obtained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This apparatus is a detector main body 1 incorporating a rotary shaft 4 incorporating a rotational position detecting element 5 having a 180 ° phase shift, a rotational position detecting sensor 3 and a displacement detecting sensor 2.
And a calculation device for treating the detected displacement. There are two pairs of the displacement detection sensors 2 orthogonal to each other, and each pair is arranged on the same plane.

At the time of measurement, the rotary shaft 4 is axially inserted to a position where the element 5 and the rotary position sensor 3 coincide with each other. When the rotary shaft 4 is rotated once in this state, the rotary position sensor detects the position of the element 5 while the rotary shaft rotates half a turn, and the displacement detection sensor 2 receives the signal to detect the displacement of the rotary shaft 4 (deviation with respect to the detector body). ) Is detected. Similarly for the remaining half rotations, the displacement (bias) of the phase shifted by 180 degrees from the first half rotation is detected. The detected displacement (bias) is sent to a computer,
The maximum displacement amount (bias amount) and its displacement direction (angle) are calculated after the number of samplings required to obtain a statistically sufficient confidence value is reached, and the result is displayed.

The detection command is intermittently issued at a specific position of one rotation (positions of 0 degree and 180 degrees in the figure) in synchronization with the rotation of the rotary shaft 4, so that when the instruction is received, As a result of the structure that can detect the displacement of the rotating shaft and the fact that it is possible to send the displacement detected between commands to the computer, as a result, the rotating shaft for the detector body at high speed rotation There is a feature that enables measurement of the displacement (bias) and its direction.

[0009]

EFFECTS OF THE INVENTION Due to the above features, in addition to being able to perform measurement in the actual rotating state, rotation position detection, displacement detection, and the operation of each electronic computer are connected by electrical signals, so that the measurement can be automated. The axis displacement measurement time can be shortened. Further, if the present invention is applied, the quality can be confirmed by measuring the time series change of the rotary shaft during the actual use rotation, and the change in use between the main shaft and the table can be detected to correct the relative position.

[Brief description of drawings]

FIG. 1 is a sectional view of the present application.

[Explanation of symbols]

 1 Detector body 2 Displacement detection sensor 3 Rotation detection sensor 4 Rotation axis 5 element

Claims (2)

[Claims] 1. A rotation-synchronized non-contact comprising a rotary shaft incorporating a rotary position detecting element, a rotary position detecting sensor for detecting the rotary shaft and a displacement detector main body having a displacement detecting sensor for detecting displacement of the rotary shaft. Rotary axis displacement measuring device. 2. A display system for treating a result detected by using the displacement measuring device with an electronic computer to obtain a maximum displacement amount and its position (angle).