JPH095013A - Distortion gauge with fixed point graduation - Google Patents

Abstract

PURPOSE: To provide a distortion gauge capable of determining the sticking position of resistance distortion gauge without directly marking a distortion measurement position on the surface of an object to be measured, while improving measuring position accuracy. CONSTITUTION: This gauge gas symbols 4a, 4b displaying the central position 3 of a distortion sensitive element 2 and fixed point graduations 6a-6b displaying an offset value from the position 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strain gauge with a fixed point scale, which has improved convenience in determining the position of sticking a resistance strain gauge.

[0002]

2. Description of the Related Art Conventionally, electric resistance strain measurement has been widely used as a means for experimentally ascertaining a stress state of a structure or the like. The conventional method is to carry out by attaching a resistance strain gauge to the strain measurement position, and after marking the resistance strain gauge attachment position on the surface of the structure etc. based on the reference position of the structure etc. It is a thing.

[0003]

However, in the above-mentioned conventional technique, when the strain measuring portion of a structure or the like has a complicated shape, the resistance strain gauge sticking position is determined based on the reference position of the structure. Direct marking is difficult and there is a problem in that the measurement position accuracy is reduced. In addition, when grasping the strain distribution by shifting the resistance strain gauge to the strain measuring part of a structure or the like and sticking it, it is necessary to individually mark the sticking position according to the shift amount, which is not economical and the measuring position There is also a problem that the accuracy is lowered.

[0004] The present invention is to solve the above problems. That is, the present invention provides a strain gauge with a fixed point scale capable of determining the sticking position of the resistance strain gauge while improving the measurement position accuracy without directly marking the strain measuring position on the surface of the measured object. The purpose is.

[0005]

In order to achieve the above object, the present invention provides a symbol indicating the central position of a strain sensing element and a fixed point scale indicating the offset amount from the central position. To have.

[0006]

According to the present invention, since the strain sensing element has a symbol indicating the center position and a fixed point scale indicating the offset amount from the center position, the strain measuring section has a complicated shape. If there is, a place where marking is relatively easy is determined in the vicinity, and a fixed point scale and a strain sensing element corresponding to the relationship with the measurement position are set in the resistance strain gauge. When combined with the marking of the object to be measured and the marking of the resistance strain gauge, it can be affixed to the desired position with high accuracy. In addition, when the resistance strain gauge is attached to the strain measurement part and the strain distribution is grasped, if the displacement amount from the standard marking is adjusted to the fixed point scale, it is not necessary to individually mark according to the displacement amount, and the desired location Can be attached with high accuracy.

[0007]

FIG. 1 is an enlarged plan view showing a first embodiment of the present invention, FIG. 2 is an enlarged plan view showing a second embodiment of the present invention, and FIG. 3 is a third embodiment of the present invention. FIG. In each figure, 1 is a base made of a transparent or translucent plastic sheet or the like, 2 is a strain sensitive element, 3 is the central position of the element 2, 4a to 4d are central position display symbols, 5
a and 5b are terminals, and 6a to 6f are fixed point scales.

In each of the embodiments, the fixed point scales 6a to 6f are laterally squared by 0.2 mm. That is, in FIG. 1, the dimension L ₁ is 0.2 mm, L ₂ is 0.4 mm, and L ₃ is 0.8 m.
m. Further, each of the examples is a strain gauge for the stress of the spline groove, of which, FIG. 1 is a left upward rising strain gauge, FIG. 2 is a right upward rising strain gauge, and FIG. 3 is a tooth bending strain gauge.

Now, referring to FIG. 1 in detail,
When the strain measurement part of the spline groove, which is the strain measurement object, has a complicated shape, decide a place where marking is relatively easy in the vicinity, so as to correspond to the relationship with the measurement position,
The fixed point scales 6a to 6f and the strain sensing element 2 are set on the resistance strain gauge. If the marking of the object to be measured and the marking of the resistance strain gauge are matched, it can be affixed to the desired position accurately.

Further, when the resistance strain gauges are affixed to the strain measuring part and the strain distribution is grasped, if the displacement from the reference marking is adjusted to the fixed point scales 6a to 6f, the individual displacements are marked according to the displacement. It can be pasted on the desired place with high accuracy without doing. In Fig. 1, the center position 3 moves by L ₁ when it is displaced 0.2 mm to the right from the tooth bottom, and it moves by L _{2 when it is} displaced 0.4 mm, and it is 0.8 mm.
Move it by L _{3 to} move it.

The same applies to FIGS. 2 and 3.
Further, the resistance strain gauge with a fixed point scale is not limited to a specific field and can be widely applied to general strain measurement.

[0012]

As described above, according to the present invention,
Since it has a symbol indicating the center position of the strain sensing element and a fixed point scale indicating the offset amount from the center position, it is difficult for the strain measuring section to directly mark the measuring position with a complicated shape. In this case, if the sticking position is indirectly determined using the fixed point scale, the marking becomes easy and the measurement position accuracy is improved. In addition, when the resistance strain gauges are attached to the strain measuring unit in a displaced manner and the strain distribution is grasped, if the displacement amount is set using a fixed point scale, it is not necessary to individually mark and the measurement position accuracy is improved.

[Brief description of drawings]

FIG. 1 is an enlarged plan view showing a first embodiment of the present invention.

FIG. 2 is an enlarged plan view showing a second embodiment of the present invention.

FIG. 3 is an enlarged plan view showing a third embodiment of the present invention.

[Explanation of symbols]

 1 Base 2 Strain-sensitive element 3 Center position 4a-4b Center position display symbol 5a, 5b Terminal 6a-6f Fixed point scale

Claims (1)

[Claims] 1. A strain gauge with a fixed point scale, comprising a symbol indicating a central position of the strain sensing element and a fixed point scale indicating an offset amount from the central position.