JP2002162298A - Piping stress evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping stress evaluation device capable of analyzing prescribed stress by acquiring data for the stress evaluation on piping being an object of the stress evaluation by non-contact. SOLUTION: Two non-contact speed sensors 20a, 20b detecting the vibration speed of the piping 1 being the evaluation object are linearly provided on a support plate 19, a sensor part I is formed mobile, the output signals of each speed sensor 20a, 20b are processed, when their output signals are processed, the signal component of a low frequency area being a vibration component due to the hand deflection of a worker grasping the sensor part I is removed from the output signals of the speed sensors 20a, 20b, and an analysis model making the piping 1 a numerical value model is utilized to calculate stress acting on the prescribed part of the piping 1.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping stress evaluation device.
Pipes branching off from the main pipe through which high-temperature steam passes.
Useful when evaluating the stress acting on the fork
It is. 2. Description of the Related Art Pipes and the like branched from a plant main pipe are
It is easy to shake. Vibration stress is applied to the pipe due to this shaking.
Works. This vibration stress is applied to the branch part (root
Part) has the greatest effect. So, such a branch
Evaluating the vibration stress acting on the part
You. [0003] Fig. 6 shows a stress evaluation of this type of pipe according to the prior art.
FIG. 3 is an explanatory diagram showing a valuation device together with a pipe to be evaluated.
You. As shown in FIG.
In the middle, the support member 3 is fixed to the wall surface 4 in the middle. This
Strain gauges 5a, 5
b is stuck. The output signal of each strain gauge 5a, 5b is
The data is supplied to the data recorder 7 via the amplifiers 6a and 6b.
The data recorder 7 performs predetermined processing.
Measuring the vibration stress acting on the branch of pipe 1
You. This measurement result is output to the printer 8 and
The data is printed by the data 8. In the figure, 9 is a valve. FIG. 7 shows an evaluation performed by the evaluation apparatus shown in FIG.
It is a flowchart which shows a procedure. As shown in the figure,
First, the strain is measured by the strain gauges 5a and 5b (step
S1). Next, stress is calculated based on the results of strain measurement.
(Step S2). Specifically, it is multiplied by the Young's modulus. [0005] Evaluation using the piping stress evaluation device as described above
The method is a direct measurement method using the strain gauges 5a and 5b.
Measurement accuracy is good, but strain gauges 5a and 5b
Since it is necessary to adhere to the pipe 1, which is the measurement object, workability
There is a problem that is bad. Sticking of strain gauges 5a and 5b
Not only requires skill in the business, but also the environment and
This is because the work is affected by the degree and the like. [0006] In particular, when the mother pipe 2 flows high-temperature steam or the like.
In some cases, the flow of the fluid is stopped and the piping 1
Wait until it cools down to a certain temperature, and then strain gauges 5a, 5b
It is necessary to perform the attachment work quickly, if necessary
Measurement cannot be performed in this case.
Lack of responsiveness. By the way, for example, in a nuclear plant
Surface temperature of the main pipe 2 is about 400 ° C during operation.
Become. When the pipe 1 is a high temperature part, a strain gauge
5a and 5b also need to be used for high temperature.
Since the strain gauges 5a and 5b themselves are expensive,
Costs will rise. Therefore, a piping stress evaluation device as shown in FIG.
Placement has also been proposed. As shown in FIG.
The evaluation device measures directly with the accelerometers 10a and 10b.
Is what you do. That is, the branch portion of the pipe 1 and this portion
It is located above the fork and swings well with the fork
The accelerometers 10a and 10b are arranged in the portion where the valve 9 is arranged.
From the acceleration signals using the analytical model of piping 1
The vibration stress at the bifurcation is measured. More specifically, the pipe 1 to be evaluated is
Has a plurality of arbitrary locations such as a branch portion and an arrangement portion of the valve 9.
Accelerometers 10a and 10b are attached to (two places in the figure)
Have been. These are output signals of the accelerometers 10a and 10b.
An acceleration signal representing the acceleration due to the vibration of the pipe 1 is supplied to an amplifier.
11a and 11b and A / D converters 12a and 12b
Input to a processing device, for example, a personal computer 13
Is done. In this personal computer 13, the FEM
(Finite element method) to support the pipe 1
The rigidity of the holding member 3, the mass of the valve 9, etc. are accurately evaluated and
Create an analysis model for tube 1 and use this analysis model
And spectrum analysis using the actually measured acceleration signal and
Perform stress analysis and clarify the correspondence between measured acceleration and generated stress.
Clearly, it is generated at any stress evaluation part such as the branch part of piping 1.
Calculate and evaluate the generated stress. The result of this calculation is
The data is output to the printer 14 and printed by the printer 14. FIG. 9 shows a personal computer of the evaluation apparatus shown in FIG.
A flowchart showing a processing procedure in the computer 13
It is. As shown in FIG.
In Fig. 3, piping 1 to be evaluated is modeled as an analysis model.
(Step S11). In such a state,
8, the accelerometers 10a and 10b and the amplifiers 11a and 11
b and acceleration signals via A / D converters 12a and 12b
(Step S12). Next, use the analysis model
Acceleration spectrum analysis from the measured acceleration signal
Step S13), displacement spectrum analysis (Step S1)
4) and stress spectrum analysis (step S15)
If it occurs at an arbitrary stress evaluation part such as a branch part of the pipe 1,
The calculated stress is calculated and evaluated (step S16). [0010] More specifically, in step S13,
Analyze the frequency of the measured acceleration signal based on the analysis model.
Thus, the acceleration response spectrum is calculated. S
In step S14, the acceleration response spectrum is integrated twice.
To calculate the response spectrum converted to displacement
You. In step S15, analysis is performed based on the displacement spectrum.
By performing the frequency response analysis of the model, the stress
To calculate In step S16, the stress spectrum
The mean of the squares is calculated based on
Calculate the stress generated in any stress evaluation part
You. [0011] The accelerometer 1 shown in FIG.
According to the piping stress evaluation apparatus using the pipes 0a and 10b, FIG.
The pipe stress evaluation device using the strain gauges 5a and 5b shown in
In comparison, the installation work of the accelerometers 10a and 10b is easier.
This installation requires no skill and the stress is analyzed
Many generated stresses at any point to estimate from the model
There is an advantage that can be estimated and evaluated. However, this piping stress evaluation device is also an accelerometer.
It is necessary to attach 10a and 10b directly to the pipe 1.
Therefore, it takes some time for this mounting operation. Further
Affected by the environment and temperature of the installation location
The point that the work is restricted is that the piping system using the strain gauges 5a and 5b
This is the same as in the case of the force evaluation device. That is, the mother pipe 2 is high.
In the case of flowing hot steam, etc., circulation of the fluid
And wait for the pipe 1 to cool down to a sufficient temperature.
It is necessary to perform the work of mounting the accelerometers 10a and 10b
is there. When the pipe 1 is a high temperature part, the accelerometer
It is necessary to use 10a and 10b for high temperature,
Accordingly, the accelerometers 10a and 10b become expensive. The present invention has been made in view of the above prior art, and has a stress evaluation.
Data for the stress evaluation without contacting the piping
Pipes that can acquire data and perform prescribed stress analysis.
It is an object to provide a force evaluation device. According to the present invention, there is provided the present invention which achieves the above object.
The configuration of Ming is characterized by the following points. 1) Speed indicating the swing of the pipe to be evaluated
Non-contact type sensors that detect physical quantities such as
The sensor is portable and formed by arranging
Process the sensor and output signals of each sensor,
In processing these output signals, the above sensor unit is used.
Low frequency, which is the vibration component due to hand shake of the gripping worker
Signal component from the sensor output signal
Based on the output signal of each sensor in the state of
Piping location using an analysis model modeled by value analysis
Signal processing means for calculating the stress acting on the fixed part
That. 2) The piping stress evaluation device described in 1) above.
The physical quantity is the vibration speed of the pipe, which is detected.
Is a speed sensor, and the signal processing means
Calculate the displacement of the pipe from the above vibration speed,
Calculates the stress acting on a predetermined part of the pipe based on
There is. 3) The piping stress evaluation device described in 1) above.
The physical quantity is the displacement of the pipe,
The sensor is a displacement sensor.
Calculate the stress acting on a specified part of the pipe based on the displacement
Things. 4) Speed indicating the swing of the pipe to be evaluated
Two non-contact sensors that detect physical quantities such as degree and displacement
And one of these sensors is supported.
While the sensor is fixedly mounted on the holding plate, the other sensor is
A sensor unit mounted on the support plate so that it can move linearly, and a movable unit
Obtained by moving the above-mentioned sensor linearly
Output signals corresponding to many measurement points to be evaluated are fixed.
With the output signal of the above sensor
In processing these output signals, the sensor
Low circumference which is a vibration component due to hand shake of the worker holding the part
Removes signal components in the wavenumber range from the output signal of the above sensor
Then, based on the output signal of each sensor in this state,
Pipes are distributed using an analysis model that is modeled by numerical analysis.
Signal processing means for calculating stress acting on a predetermined portion of the pipe;
Having 5) The pipe stress evaluation device described in 4) above.
The physical quantity is the vibration speed of the pipe, which is detected.
Is a speed sensor, and the signal processing means
Calculate the displacement of the pipe from the above vibration speed,
Calculates the stress acting on a predetermined part of the pipe based on
There is. 6) The piping stress evaluation device described in 4) above.
The physical quantity is the displacement of the pipe,
The sensor is a displacement sensor.
Calculate the stress acting on a specified part of the pipe based on the displacement
Things. 7) Speed indicating the swing of the pipe to be evaluated
Two non-contact sensors that detect physical quantities such as degree and displacement
And one of these sensors is supported.
While the sensor is fixedly mounted on the holding plate, the other sensor is
Movably arranged on the support plate to measure the piping
Sensor formed so that the position can be traced linearly
By rotating the part and the rotatable sensor,
Output signals corresponding to a large number of measurement points to be obtained are fixed.
When processed together with the specified sensor output signal
In processing these output signals,
Vibration component caused by camera shake of the worker holding the sensor
The low-frequency signal component is removed from the output signal of the above sensor.
And based on the output signal of each sensor in this state,
Using an analysis model that was modeled by numerical analysis of piping
Signal processing means for calculating the stress acting on a predetermined portion of the pipe
And having 8) The pipe stress evaluation device described in 7) above.
The physical quantity is the vibration speed of the pipe, which is detected.
Is a speed sensor, and the signal processing means
Calculate the displacement of the pipe from the above vibration speed,
Calculates the stress acting on a predetermined part of the pipe based on
There is. 9) The pipe stress evaluation device described in 7) above.
The physical quantity is the displacement of the pipe,
The sensor is a displacement sensor.
Calculate the stress acting on a specified part of the pipe based on the displacement
Things. Embodiments of the present invention will be described below with reference to the drawings.
It will be described in detail based on FIG. In each figure, the same parts as those in FIG.
Are given the same numbers, and overlapping descriptions are omitted. <First Embodiment> FIG. 1 shows a first embodiment of the present invention.
The piping stress evaluation device according to the embodiment of
FIG. 3 is an explanatory view showing the pipe together with the pipe. As shown in the figure,
The sensor unit I includes a plate-shaped support plate 19 and
Predetermined intervals are set at multiple locations (two locations in the figure) on a straight line
(Two) speed sensors 20a, 20
b, and the worker 18
It is portable with the top 19a.
Here, the speed sensors 20a and 20b are non-contact type sensors.
Is not particularly limited, but among existing sensors
Laser speed sensors are preferred. Speed sensor of this form
20a and 20b use laser speed sensors. Ma
In addition, the distance between the speed sensors 20a and 20b is also particularly limited.
No, for example, a branch part of the pipe 1 which is a stress evaluation part
And the distance between the part where the valve 9 is attached, which is the part that swings well,
It is preferred to do so. In this embodiment, this interval is
You. Since the sensor unit I is portable, for example,
If the worker holds this sensor part I
To the vicinity of the measurement target measurement site (for example, the valve 9
Irradiate laser beam toward the mounting part and the branch part of piping 1)
I do. As a result, a speed signal indicating the swing speed of the measurement part is obtained.
Obtain each without contact. Then, in the case of the device shown in FIG.
In the same manner as in
By performing the specified processing and calculation,
Then, the vibration stress at the branch of the pipe 1 is calculated. More specifically, the speed sensor 20a,
The speed signal representing the vibration speed of the pipe 1, which is the output signal of 20b
The symbols are amplifiers 21a and 21b and A / D converter 22a,
Processing device, for example, a personal computer
Input to the data 23. This personal computer 23
Now, by using FEM (finite element method)
1 to accurately evaluate the rigidity of the support member 3 and the mass of the valve 9
To create an analytical model of the piping 1
Using the analysis model and the measured speed signal
Analysis and stress analysis.
Clarify the response and evaluate any stresses such as the branch of piping 1
Calculate and evaluate the stress generated in the part. This calculation result
The result is output to the printer 24 and printed by the printer 24
Is done. In the measurement using the device according to the present embodiment
This is because the operator 18 is holding the sensor unit I.
The support plate 19 of the sensor unit I vibrates due to the shaking of the trader 18.
I do. This vibration component is obtained by the speed sensors 20a and 20b.
Is included in each speed signal,
Are localized in a lower frequency range than the component due to the vibration of. But
Therefore, the camera shake component is reduced by filtering each speed signal.
Can be removed. In this embodiment, each speed signal is set to high.
Low-pass camera shake component by passing through a pass filter
Has been removed. FIG. 2 shows a personal computer of the evaluation apparatus shown in FIG.
A flowchart showing a processing procedure in the computer 23.
It is. As shown in FIG.
In FIG. 3, the pipe 1 to be evaluated is a conventional pipe shown in FIG.
Modeled as an analysis model created by the same method as
(Step S21). In this state, FIG.
Speed sensors 20a, 20b and amplifiers 21a, 21 shown
b and the speed signal via the A / D converters 22a and 22b.
Capture (step S22). Next, using the analysis model
Speed spectrum analysis (step
S23), filter processing (step S24), displacement spec
Vector analysis (step S25) and stress spectrum analysis
(Step S26) is performed, and an arbitrary portion such as a branch portion of the pipe 1 is
Calculate and evaluate the stress generated in the stress evaluation part (S
Step S27). More specifically, in step S23,
Analyzes the frequency signal of the measured speed signal based on the analysis model
Thus, a response spectrum of the velocity is calculated. Step
In step S24, the speed spectrum is increased by a high-pass filter.
Extract only frequency components. This causes camera shake
The effect of the vibration of the supporting plate 19 is eliminated. Step S25
Now, by integrating the response spectrum of velocity once
Calculate the response spectrum converted to displacement. Step S
In 26, the frequency of the analysis model based on the displacement spectrum
A stress spectrum is calculated by performing a response analysis.
In step S27, based on the stress spectrum,
By performing a root-mean-square operation, any stress, such as a branch of the pipe 1,
The stress σ occurring in the evaluation part is calculated. <Second Embodiment> FIG. 3 shows a second embodiment of the present invention.
The piping stress evaluation device according to the embodiment of
FIG. 3 is an explanatory view showing the pipe together with the pipe. As shown in the figure,
The device according to the present embodiment is different from the device shown in FIG.
Only the configuration of II is different. That is, the sensor unit II
Are similar to the first embodiment shown in FIG.
Speed sensors 30a, 30
b, but the speed sensor 30b according to the present embodiment
For the speed sensor 30a fixed to the lower part of the holding plate 29,
It is formed so that it can move linearly in the vertical direction in the figure. You
In other words, the support plate 29 has a straight line extending vertically.
The speed sensor 30b is provided with a ball sensor.
The rotation of the jaws 32 causes the rails 31 and the ball screws 32 to be
Move. At this time, the rotational drive of the ball screw 32 is not supported.
This is performed by a motor 33 provided on the holding plate 29. Also, speed sensor
The position of the cer 30b is determined by the amount of rotation of the ball screw 32.
The location information is specified and the personal computer 35
Is supplied to 3, the same parts as those in FIG.
Numbers are given and duplicate descriptions are omitted. In the apparatus according to the present embodiment as well,
Indicates that the operator can use the support plate 2 via the grip 29a of the support plate 29.
9 and go to the vicinity of the measurement target such as pipe 1
The target measurement site is irradiated with laser light. This and
The laser beam from the speed sensor 20a
The laser beam from the speed sensor 30b.
The initial position of the degree sensor 30b (for example, the speed sensor 30
a) from above (in the immediate vicinity of a) to the top along the axial direction of the pipe 1.
Then, the speed caused by the swing of each part is detected. As a result, the speed representing the swing speed of the measurement portion
A large number of signals are obtained without contact. Then, place the device shown in FIG.
In the same manner as in the case
Each speed signal is obtained by performing predetermined processing and calculation based on
The vibration stress at the branch of the pipe 1 is calculated from the above. At this time,
In this embodiment, unlike the case of FIG.
Not only the speed information but also the speed sensor 30a
The velocity information at many points above it along with the bifurcation
obtain. That is, equivalently, besides the speed sensor 30a
Creates a state similar to having many speed sensors
Can be Therefore, the estimation accuracy of stress σ
Is improved. The personal computer 3 in the present embodiment
5 is basically a flowchart shown in FIG.
It is the same as g. However, in this embodiment, the multi-point
Processing the speed based on the sway together with its measured position information
Finally, the stress σ generated in the stress evaluation part is calculated and estimated.
Set. <Third Embodiment> FIG. 4 shows a third embodiment of the present invention.
The piping stress evaluation device according to the embodiment of
FIG. 3 is an explanatory view showing the pipe together with the pipe. As shown in the figure,
The device according to the present embodiment is a speed sensor 3 of the device shown in FIG.
The same operation as the linear movement of the speed sensor 40b is performed by the speed sensor 40b.
This is realized by rotation. That is, the sensor unit II
I, a support plate 39 and a speed sensor disposed on the support plate 39.
Having speed sensors 40a and 40b
Is attached to the center of the support plate 39 via the shaft 42.
You. The shaft 42 is connected to a motor 43 fixed to the support plate 39.
With a horizontal axis, so the speed sensor
The laser light emitted by the laser 40b is rotated by the
Move linearly in the axial direction. That is, the speed sensor 4
0b irradiates the surface of the pipe 1 in its axial direction.
It can be traced straight along. Where speed sensor
Of the pipe 1 measured by the laser beam irradiated from the
The part is the amount of rotation from the initial position of the speed sensor 40b.
The first time from the speed sensor 40b to the specified part
Computer with information indicating the distance in the initial state.
Data 45. In FIG. 4, the same parts as FIG.
Are denoted by the same reference numerals, and duplicate description will be omitted. In the apparatus of the present embodiment as well,
Indicates that the operator can handle the support plate 3 via the grip 39a of the support plate 39.
9 and go to the vicinity of the measurement target such as pipe 1
The target measurement site is irradiated with laser light. This and
The laser beam from the speed sensor 40a
Irradiate the part. On the other hand, the speed from the speed sensor 40b
The light rotates the speed sensor 40b by the motor 43.
By shaking, the initial position (for example, the speed sensor 40
a straight line from the top immediately above a) along the axial direction of the pipe 1
Move. Thus, the speed sensor 40b is a laser
Detects speed caused by shaking of each part on the straight line where light moves
I do. As a result, a speed representing the swing speed of the measurement portion
A large number of signals are obtained without contact. Then, the signal processing is shown in FIG.
This is performed in the same manner as in the second embodiment shown. As a result, this form
Also, in addition to the speed sensor 40a, a number of speed sensors
-It can create a state equivalent to arranging
Therefore, the estimation accuracy of the stress σ is improved accordingly. The personal computer 4 in the present embodiment
5 is basically a flowchart shown in FIG.
It is the same as g. However, in this embodiment, the multi-point
Processing the speed based on the sway together with its measured position information
Finally, the stress σ generated in the stress evaluation part is calculated and estimated.
Set. The purpose of the pipe stress evaluation device according to the present invention is as follows.
Measure the swing of the pipe 1 and calculate the stress spectrum based on this.
For example, it can be created at any measurement site,
It is to calculate the stress to be used. Therefore,
In the first to third embodiments, the speed sensor 20
a, 20b, 30a, 30b 40a, 40b were used.
However, this achieves the same goal using displacement sensors.
obtain. Speed sensors 20a, 20b, 30a, 30b
The personal computer when displacement sensors are substituted for 40a and 40b
Basic communication in the null computers 23, 35, 45
The processing procedure of the signal is explained based on the flowchart of FIG.
Good. As shown in FIG. 5, similar to FIG. 2,
Modeled analysis model of piping 1 to be evaluated
(Step S51) In step S51, a displacement signal is output via a displacement sensor.
(Step S52). Next, use the analysis model
Displacement spectrum analysis (step
Step S53), filter processing (step S54), displacement
Spectrum analysis (step S55) and stress spectrum
Analysis (step S56), and the arbitrary
Calculate and evaluate the stress generated in the stress evaluation part of
(Step S57). That is, FIG. 2 is based on speed.
To process the signal, integrate the velocity component once and calculate the displacement component
The integration is not necessary,
Basically, the same signal processing as in the case of FIG. 2 is performed. The displacement sensor at this time is a non-contact
If it is possible to measure the displacement of the surface of the pipe 1 with a special
No restrictions. However, the existing one is a laser displacement sensor
Is preferred. This embodiment also uses a laser displacement sensor
I have. In the first to third embodiments,
Measures velocity and displacement as physical quantities representing the sway of the pipe 1.
However, it is not particularly limited to these.
No. The present invention has been described specifically with the above embodiments.
As described above, the invention described in [Claim 1] is subject to evaluation.
To detect physical quantities such as speed, displacement, etc.
A plurality of contact-type sensors are linearly arranged on a support plate.
And portable sensor unit and output signal of each sensor
As well as processing these output signals.
Vibration caused by camera shake of the operator
The low-frequency signal component, which is the dynamic component, is output from the above sensor.
Output from each sensor in this state.
Analysis model based on numerical analysis of the above piping based on
Calculate the stress acting on a specified part of the pipe using a tool
With the signal processing means, the following effects are obtained. Evaluation vs.
The necessary information can be obtained without contacting the elephant piping.
Requires installation of a sensor on the pipe.
It is possible to easily perform predetermined measurement and stress evaluation without
Wear. Also, it is necessary to attach the sensor to the piping.
The condition of this piping and its
Perform prescribed operations without being affected by the surrounding environmental conditions.
I can. Furthermore, the sensor unit is portable.
Therefore, even if there are many measurement units,
Can be performed quickly and easily. The invention described in [Claim 2] is based on [Claim 2]
In the piping stress evaluation device described in [1], the physical quantity is distributed.
The sensor that detects the vibration speed of the tube is a speed sensor
The signal processing means uses
The displacement is determined, and based on this displacement,
Since it calculates the acting stress, the following effects can be obtained.
You. The effect of the invention described in [Claim 1] is a speed sensor
This can be realized by using The invention described in [Claim 3] is based on [Claim 3
In the piping stress evaluation device described in [1], the physical quantity is distributed.
The sensor that detects this by the displacement of the pipe is a displacement sensor
Yes, the signal processing means uses a predetermined
Since it calculates the stress acting on the part,
Get fruit. The effect of the invention described in [Claim 1] is
It can be realized using a sensor. Therefore, from the displacement component
The stress component can be calculated directly, using a speed sensor.
When the displacement component is obtained by integrating the velocity component as in
This operation is not required, and the signal processing is correspondingly simplified. The invention described in claim 4 is an object to be evaluated
Detects physical quantities such as speed and displacement that represent the sway of the piping
With two non-contact sensors
One of the sensors is fixedly mounted on the support plate.
On the other hand, the other sensor is linearly movable on the support plate.
The arranged sensor unit and the movable sensor are linearly connected.
To many measurement points to be evaluated by moving
The corresponding output signal is converted to the fixed output signal of the sensor.
And output signals as well as
In the process, the hand of the worker holding the sensor
The signal component in the low frequency range, which is the vibration component
From the output signal of the
Based on the output signal, model the above piping by numerical analysis
Acting on a specified part of piping using an analytical model
And the signal processing means for calculating
You. In addition to the same effects as the invention described in [Claim 1],
With two sensors, we used many sensors equivalently
A predetermined stress evaluation can be performed with the same accuracy as described above. The invention described in [Claim 5] is based on [Claim 5]
In the piping stress evaluation device described in 4), the physical quantity
The sensor that detects the vibration speed of the tube is a speed sensor
The signal processing means uses
The displacement is determined, and based on this displacement,
Since it calculates the acting stress, the following effects can be obtained.
You. The effect of the invention described in [Claim 4] is a speed sensor
This can be realized by using The invention described in [Claim 6] is based on [Claim 6
In the piping stress evaluation device described in 4), the physical quantity
The sensor that detects this by the displacement of the pipe is a displacement sensor
Yes, the signal processing means uses a predetermined
Since it calculates the stress acting on the part,
Get fruit. The effects of the invention described in [Claim 4] are
It can be realized using a sensor. Therefore, from the displacement component
The stress component can be calculated directly, using a speed sensor.
When the displacement component is obtained by integrating the velocity component as in
This operation is not required, and the signal processing is correspondingly simplified. The invention described in claim 7 is subject to evaluation
Detects physical quantities such as speed and displacement that represent the sway of the piping
With two non-contact sensors
One of the sensors is fixedly mounted on the support plate.
On the other hand, the other sensor is rotatably arranged on the support plate
This makes it possible to linearly trace the measurement site of the pipe.
And a rotatable sensor.
Multiple measurements of the evaluation object obtained by rotating the circulator
The output signal corresponding to the point is output from the fixed sensor.
Together with the force signal and these output signals
In processing the
Above low-frequency signal components, which are vibration components caused by camera shake
Removed from the output signal of the sensor
Based on the output signal of
Acts on a specified part of piping using a simplified analysis model
With the signal processing means for calculating the stress, the following effects can be obtained.
Get. In addition to the same effects as the invention described in [Claim 1],
For example, two sensors are equivalent to using many sensors.
As described above, stress evaluation can be performed accurately. Further
In addition, as compared with the invention described in claim 4, the rotating sensor
It is not necessary to change the position of the sir linearly,
The holding plate may also be small, contributing to the miniaturization of the sensor part,
In turn, its portability is better. The invention described in [Claim 8] is based on [Claim 8]
In the piping stress evaluation device described in [7], the physical quantity is distributed.
The sensor that detects the vibration speed of the tube is a speed sensor
The signal processing means uses
The displacement is determined, and based on this displacement,
Since it calculates the acting stress, the following effects can be obtained.
You. [Claim 7] The effect of the invention described in [7] is a speed sensor
This can be realized by using The invention described in [Claim 9] is based on [Claim 9]
In the piping stress evaluation device described in [7], the physical quantity is distributed.
The sensor that detects this by the displacement of the pipe is a displacement sensor
Yes, the signal processing means uses a predetermined
Since it calculates the stress acting on the part,
Get fruit. The effect of the invention described in [Claim 7] is
It can be realized using a sensor. Therefore, from the displacement component
The stress component can be calculated directly, using a speed sensor.
When the displacement component is obtained by integrating the velocity component as in
This operation becomes unnecessary, and signal processing becomes simpler.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a piping stress evaluation device according to a first embodiment of the present invention, together with piping to be evaluated. FIG. 2 is a flowchart showing an evaluation procedure in the apparatus shown in FIG. FIG. 3 is a flowchart showing another evaluation procedure in the apparatus shown in FIG. FIG. 4 is an explanatory diagram showing a piping stress evaluation device according to a second embodiment of the present invention together with piping to be evaluated. FIG. 5 is an explanatory diagram showing a piping stress evaluation device according to a third embodiment of the present invention, together with piping to be evaluated. FIG. 6 is an explanatory diagram showing a piping stress evaluation device according to a conventional technique together with piping to be evaluated. FIG. 7 is a flowchart showing an evaluation procedure in the device shown in FIG. 7; FIG. 8 is an explanatory diagram showing another piping stress evaluation device according to the related art together with piping to be evaluated. 9 is a flowchart showing an evaluation procedure in the device shown in FIG. [Explanation of Signs] I, II, III Sensor part 1 Pipe 2 Mother pipe 19, 29, 39 Support plates 20a, 20b, 30a, 30b, 40a, 40b
Speed sensor 32 Ball screw 33 Motor 42 Axis 43 Motor

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G21C 17/003 G01M 7/00 A // F17D 5/00 G21C 17/00 E (72) Inventor Takayuki Dodo Kobe, Hyogo Prefecture 1-1-1, Wadazakicho, Hyogo-ku, Municipality Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Junichi Oida 1-1-1, Wadasakicho, Hyogo-ku, Hyogo-ku, Kobe, Hyogo Prefecture F in Kobe Shipyard, Mitsubishi Heavy Industries, Ltd. Term (reference) 2G024 AD50 BA13 BA15 CA13 FA06 2G064 AA04 AB01 AB02 AB23 BA02 BA28 BC32 CC06 CC13 CC33 CC42 2G075 CA13 DA02 FA11 FB05 FB07 FC14 GA02 GA03 GA16 3J071 AA03 BB14 EE19 EE29 EE30

Claims (1)

Claims: 1. A speed representing a swing of a pipe to be evaluated,
A plurality of non-contact type sensors for detecting physical quantities such as displacement are linearly arranged on a support plate, and are formed in a portable manner.The output signals of each sensor are processed, and the output signals of these sensors are processed. In processing, a signal component in a low frequency range, which is a vibration component due to hand shake of an operator holding the sensor unit, is removed from the output signal of the sensor, and based on the output signal of each sensor in this state, the pipe is connected. And a signal processing means for calculating a stress acting on a predetermined portion of the pipe using an analysis model modeled by numerical analysis. 2. A piping stress evaluation device according to claim 1, wherein the physical quantity is a vibration speed of the pipe, a sensor for detecting the physical quantity is a speed sensor, and the signal processing means detects displacement of the pipe from the vibration speed. And calculating a stress acting on a predetermined portion of the pipe based on the displacement. 3. The pipe stress evaluation device according to claim 1, wherein the physical quantity is a displacement of the pipe, a sensor for detecting the displacement is a displacement sensor, and the signal processing means includes a predetermined portion of the pipe based on the displacement. A pipe stress evaluation device for calculating a stress acting on a pipe. 4. A speed representing a swing of a pipe to be evaluated,
It has two non-contact sensors that detect physical quantities such as displacement. One of these sensors is fixedly mounted on the support plate, while the other sensor is supported so that it can move linearly. A sensor unit disposed on a plate, and output signals corresponding to a large number of measurement points to be evaluated obtained by linearly moving the movable sensor,
In addition to processing with the fixed output signal of the sensor, and processing these output signals, a signal component in a low frequency range, which is a vibration component due to a hand shake of an operator holding the sensor unit, is output from the sensor. Signal processing means for calculating a stress acting on a predetermined portion of the pipe using an analysis model obtained by numerically analyzing and modeling the pipe based on the output signals of the sensors in this state. Characteristic piping stress evaluation device. 5. The pipe stress evaluation apparatus according to claim 4, wherein the physical quantity is a vibration speed of the pipe, and a sensor for detecting the physical quantity is a speed sensor. And calculating a stress acting on a predetermined portion of the pipe based on the displacement. 6. The pipe stress evaluation apparatus according to claim 4, wherein the physical quantity is a displacement of the pipe, a sensor for detecting the displacement is a displacement sensor, and the signal processing means includes a predetermined portion of the pipe based on the displacement. A pipe stress evaluation device for calculating a stress acting on a pipe. 7. A speed representing a swing of a pipe to be evaluated,
It has two non-contact type sensors that detect physical quantities such as displacement, and one of these sensors is fixedly mounted on the support plate, while the other sensor is rotatably mounted on the support plate. A sensor unit formed so that the measurement site of the pipe can be traced linearly by disposing the sensor, and outputs corresponding to a large number of measurement points to be evaluated obtained by rotating the rotatable sensor. The signal is processed together with the output signal of the fixed sensor, and in processing these output signals, a signal component in a low frequency range, which is a vibration component caused by a hand shake of an operator holding the sensor unit, is processed by the sensor. From the output signal of each sensor, and based on the output signal of each sensor in this state, acts on a predetermined part of the pipe using an analysis model that is modeled by numerical analysis of the pipe. A signal processing means for calculating a stress to be applied. 8. The pipe stress evaluation device according to claim 7, wherein the physical quantity is a vibration speed of the pipe, and a sensor for detecting the physical quantity is a speed sensor. And calculating a stress acting on a predetermined portion of the pipe based on the displacement. 9. The pipe stress evaluation device according to claim 7, wherein the physical quantity is a displacement of the pipe, and a sensor for detecting the displacement is a displacement sensor, and the signal processing means determines a predetermined portion of the pipe based on the displacement. A pipe stress evaluation device for calculating a stress acting on a pipe.