JP2001305069A - Vessel evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily inspect a high pressure gas vessel in a short time, positively inspecting a dangerous defect apt to be overlooked in visual observation, without depending on individual criterion. SOLUTION: This vessel evaluation device 3 for inspecting and evaluating a high pressure gas vessel 1 is provided with an evaluation reference information registering part 7 for registering and storing evaluation reference information of the high pressure gas vessel 1; a measurement information storage part 4 for measuring the high pressure gas vessel 1 using various measuring device 22, 23, 24 and 25 and storing obtained measurement information; an evaluation object information computing means 5 for obtaining desired evaluation object information from the measurement information; and an evaluating means 6 for referring to the evaluation reference information to evaluate the high pressure gas vessel 1 on the basis of the evaluation object information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container evaluation device for inspecting and evaluating a high-pressure gas container.

[0002]

2. Description of the Related Art Conventionally, a high-pressure gas container filled with a high-pressure gas such as an LP gas is regularly visually inspected, checked for damage, and judged to be acceptable or rejected. In addition, a pressure test is periodically performed to determine whether or not the container can withstand high-pressure gas filling in the future.

[0003]

However, in the above-mentioned visual inspection, even if an accurate inspection is performed by a skilled inspection technician, it depends heavily on individual judgment criteria and may lead to erroneous judgment. is there. In addition, it is inevitable to overlook dangerous defects such as deterioration inside the metal, pinholes and blowholes, which cannot be visually confirmed.

[0004] The pressure test is to check the pressure resistance by injecting water into a container, filling the container with water, and then applying pressure to the container. Although the pressure resistance can be reliably checked, it requires man-hours and manpower. This is a complicated and time-consuming operation.

[0005] The present invention has been proposed in view of the above,
It is an object of the present invention to provide a container evaluation device that can reliably check for dangerous defects that are likely to be overlooked without relying on individual judgment criteria and that can easily and quickly inspect a high-pressure gas container. And

[0006]

According to a first aspect of the present invention, there is provided a container evaluation apparatus for inspecting and evaluating a high-pressure gas container. An evaluation reference information registration unit for registering and storing information, a measurement information storage unit for storing obtained measurement information obtained by measuring a high-pressure gas container using various measurement devices, and an evaluation target for obtaining desired evaluation target information from the measurement information It is characterized by comprising information calculation means and evaluation means for evaluating the high-pressure gas container based on the evaluation target information with reference to the evaluation criterion information.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the measurement information storage unit stores measurement information obtained from a non-contact three-dimensional measurement device. The evaluation object information calculating means performs processing on the measurement information, obtains the appearance information of the high-pressure gas container as the evaluation object information from the processing information, and the evaluation means includes the normal appearance reference information of the evaluation criterion information. In comparison, the pass / fail judgment evaluation of the high-pressure gas container is performed.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the present invention, the external appearance information includes a cap, a neck, an upper head plate, a body, a lower head plate of a high-pressure gas container, Information on at least one of a skirt and a protector.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the measurement information storage section stores measurement information obtained from a non-contact three-dimensional measurement device. The evaluation target information calculation means performs processing on the measurement information, and obtains defect information of the high-pressure gas container as the evaluation target information from the processing information. According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect, the defect information is information on at least one of corrosion, flaws, dents, and pinholes of the high-pressure gas container. There is a feature.

According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the present invention, the defect information includes at least one of a corrosion, a flaw, a dent, and a pinhole of the high-pressure gas container. Information about one.

According to a sixth aspect of the present invention, in addition to the configuration of the fourth aspect of the present invention, the defect information includes the area of corrosion and the amount of thinning, the length and depth of a flaw,
The area and depth of the dent, and the depth of the pinhole, and the evaluation means substitutes the sum or maximum value of the defect information into the appearance discriminant of the evaluation criterion information to obtain the appearance discrimination value obtained at that time. Comparing with the threshold value for appearance determination of the evaluation criterion information, and performing pass / fail evaluation of the high-pressure gas container;
It is characterized by:

[0012] Further, in the invention according to claim 7, in addition to the configuration of the invention described in claim 4, the defect information is an area of corrosion and an amount of thinning.
The corrosion rate and the thinning rate obtained by using the above defect information are substituted into the withstand voltage discriminant of the evaluation criterion information, and the withstand voltage discrimination value obtained at that time is used as a threshold for withstand pressure discrimination among the evaluation criterion information. And a pass / fail judgment evaluation of the high-pressure gas container is performed.

According to an eighth aspect of the present invention, in addition to the configuration of the fourth aspect of the present invention, the evaluation object information calculating means includes a function of detecting a defect, such as corrosion, flaw, dent, and pinhole. In addition to obtaining the shape and the amount of wall thinning, the location where the stress concentration is maximum and the maximum stress concentration value thereof are determined from these data, and the maximum stress concentration location and the maximum stress concentration value and the obtained high-pressure gas container are obtained. The remaining life of the high-pressure gas container is obtained from the history and the attributes of the high-pressure gas container, and is used as information to be evaluated.

According to a ninth aspect of the present invention, in addition to the configuration of the eighth aspect of the present invention, the evaluation means may further include: Is characterized by determining whether or not to maintain the life and evaluating.

According to a tenth aspect of the present invention, in addition to the configuration of the eighth aspect of the present invention, the history of the high-pressure gas container is the number of times the high-pressure gas has been filled into the container, and the attribute is the container. The original thickness, material, etc. of the steel plate used for the above.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 are explanatory views of a high-pressure gas container to be evaluated. A high-pressure gas container (hereinafter, simply referred to as a “container”) 1 shown in FIG. 1 is a 50 kg LP gas container, and includes a cap 11, a neck 12, an upper head plate 13, a body 14, a lower head plate 15, and a skirt 16. I have. Further, the container 1 shown in FIG. 2 is a 20 kg type LP gas container, which is provided with a protector 17, and the other parts are a neck 12, an upper end plate 13, a body portion 14, and a lower end plate 1, similarly to the 50 kg type.
5 and a skirt 16.

FIGS. 3A and 3B schematically show a container measuring system, wherein FIG. 3A is a front view and FIG. 3B is a side view. In the figure, a measurement system 20 has two rollers 21a, 21a juxtaposed on a support 21 and the rollers 21a, 21a are arranged side by side.
The container 1 is horizontally mounted on the container 21a and is rotatable. A color CCD is provided above and on both sides of the container 1.
Video camera (hereinafter simply referred to as "camera") 22,2
3, 24 are arranged. The camera 22 captures an image of the body 14 of the container 1, and the camera 23 controls the head (cap 1) of the container 1.
1, a neck 12, an upper head plate 13, and a protector 17), and a camera 24 is provided at the bottom of the container 1 (skirt 16, lower head plate 1).
5) is imaged respectively. A laser scanner 25 is movably disposed on a rail 21b provided at the center of the bottom surface of the support 21 so that the container 1 can be measured from below. Thus, this measurement system 20 is a non-contact 3
It is configured as a dimension measurement system.

FIG. 4 is a block diagram showing the configuration of the container evaluation apparatus of the present invention. The cameras 22, 23, and 24 and the laser scanner 25 of the measurement system 20 are connected to the container evaluation device 3 of the present invention as shown in the figure, and send measurement information such as image data to the container evaluation device 3.

The container evaluation device 3 of the present invention is a device for inspecting and evaluating the container 1, and includes an evaluation reference information registration unit 7 that registers and stores evaluation reference information of the container 1, which has been prepared in advance, A measurement information storage unit 4 for storing the measurement information sent from the storage unit 20; an evaluation target information calculation unit 5 for obtaining desired evaluation target information from the measurement information; and a container based on the evaluation target information with reference to the evaluation criterion information. Evaluation means 6 for performing the evaluation of 1. This container evaluation device 3
Is built in a computer, the above-described evaluation criterion information registration unit 7 and the measurement information storage unit 4 are provided in a large-capacity storage device such as a hard disk, and the evaluation target information calculation unit 5 and the evaluation unit 6 The CPU is configured as a software function by executing the program according to the program in the ROM.

In the present invention, the evaluation target information calculating means 5
Obtains the appearance information Ip, the defect information Iq, and the stress-related information Ir as the evaluation target information, and the evaluation means 6 evaluates the information Ip, Iq, and Ir. In the following description, first, the appearance information Ip and its evaluation will be described.

The appearance information Ip is information representing the outer shape of each part of the container 1 or the amount of deformation appearing on the outer shape. That is, the cap 11, the neck 12, the upper head plate 13, the trunk 1
4. Information indicating the outer shape of the lower end plate 15, skirt 16, and protector 17 or the amount of deformation appearing on the outer shape. The appearance information Ip is obtained as follows by using a large number of pieces of image information obtained by imaging with the cameras 22, 23, and 24 and stored in the measurement information storage unit 4.

FIG. 5 is an explanatory diagram showing appearance information and a procedure for evaluating the appearance information. Here, the neck 12 and the skirt 16 will be described as an example. Evaluation target information calculation means 5
Is an arbitrary number stored in the measurement information storage unit 4 in the first step and is necessary to specify the shapes of the neck 12 and the skirt 16 from a large number of pieces of image information of the container 1 to be inspected this time. Select an image. In the next step, a binarization process is performed for each image to clarify the shape of the container 1.

In the next step, a comparison is made with the normal appearance reference information Ipo registered in advance in the evaluation reference information registration section 7 and a pattern matching process is performed, so that the current inspection target product is To determine how much deformation has occurred. The normal appearance reference information Ipo
Are the rollers 21a, 21a in the measurement system 20.
This is image processing information obtained by placing a normal container serving as a reference on top, taking an image, and performing binarization processing. , The normal appearance reference information Ipo is displayed as a black area,
The product to be inspected this time is displayed as a white area.
By the comparison in this step, for example, in the case of the neck 12, the inclination angle δ1 is obtained as the appearance information Ip, and in the case of the skirt 16, the dent amount δ2 of the bottom surface is obtained as the appearance information Ip. In this way, various appearance information Ip of the container 1 is obtained.

In the step, the evaluation means 6
Is the appearance information Ip (here, the inclination angle δ1 of the neck 12 and the amount of depression δ2 of the bottom of the skirt 16) obtained as described above, and various threshold values δ0 registered in advance in the evaluation reference information registration unit 7. Is compared with the corresponding threshold value, and it is determined whether or not the difference is within the allowable range. If the difference is within the allowable range, it is determined that the product is acceptable. Assume that it is good.

Next, the defect information Iq will be described. The defect information Iq is stored in each part of the container 1 (cap 11, neck 1
2, upper end plate 13, trunk 14, lower end plate 15, skirt 1
6, information indicating a defect that has appeared on the protector 17).
For example, it refers to the length and depth of a flaw, the area and depth of a dent, the depth of a pinhole, the corroded area, the depth of corrosion, as well as the amount of wall thinning due to these defects and the position and radius of the maximum wall thickness. A method for obtaining the length of a flaw, the area and depth of a dent, and the corroded area among these pieces of defect information will be described with reference to FIGS. 6, 7, and 8. FIG.

FIG. 6 is a diagram showing a procedure for obtaining the length of a flaw in the defect information. The evaluation target information calculating means 5 obtains the length of the flaw according to the procedures shown in FIG. In a first step, one image is selected from a large number of pieces of image information of the container 1 which is the inspection target product stored in the measurement information storage unit 4 and the length of one pixel in the image is selected. calculate. This calculation is based on a known length, for example, the height h of the container 1.
Determined using 1.

In the next step, a process of emphasizing pixels having the same hue or luminance is performed on the partial image cut out from the image of the container 1.

In the following step, binarization processing is performed on the partial image that has been subjected to the processing described above, and in another step, labeling processing is performed. That is, it is determined whether or not the emphasized pixels are continuous for a predetermined length or more by using pattern recognition, and if the emphasized pixels are continuous for a predetermined length or more, an operation of specifying a flaw is performed.

In the step (b), the number of pixels in the area specified as being incapable of the labeling process in the step (b) is counted, and the length of one pixel calculated based on the counted pixel number is applied. Ask for it.

FIG. 7 is a diagram showing a procedure for obtaining the area and depth of a dent in the defect information. The evaluation target information calculation means 5 obtains the area and depth of the dent according to the procedure shown in FIG. In the first step, information representing the outline of the container 1 is selected from the multiple pieces of measurement information of the container 1 that is the inspection target product stored in the measurement information storage unit 4, and the body 14 is sliced. Recognize by outline. This contour is extracted from the measurement information of the laser scanner 25.

In the next and subsequent steps, a comparison is made with the normal appearance reference information Ipo registered in advance in the evaluation reference information registration unit 7 and a pattern matching process is performed. The degree of deformation δ3 of the normal container is determined, and the dent amount δ3 is obtained. In this case, the normal appearance reference information Ipo is obtained by mounting a normal container serving as a reference on the rollers 21a and 21a in the measurement system 20, measuring with the laser scanner 25, and processing the measurement information. Information.

Then, the starting point P1 and the ending point P2 of the dent are obtained in the step (1), and in the subsequent step, P1 and P2 of each contour are connected to form a closed polygon, and the area of the dent is obtained.

FIG. 8 is a diagram showing a procedure for obtaining the corroded area in the defect information. The evaluation target information calculating means 5 obtains the corrosion area in the same manner as the above-described method for obtaining the length of the flaw, in accordance with the procedure shown in FIG. In the first step, one image is selected from a large number of pieces of image information of the container 1 which is the inspection target product stored in the measurement information storage unit 4, and the area of one pixel in the image is determined. calculate. That is, first, a length for one pixel is obtained using a known length, for example, the height h1 of the container 1, and 1 is calculated from the length.
The area for a pixel is obtained.

In the next step, a process for emphasizing pixels having the same color or brightness and clarifying the corroded area is performed on the partial image cut out from the image of the container 1. The determination as to whether the area is a corrosion or a dent due to a mere impact is made based on the color and luminance of the image before the enhancement processing.

In the following step, binarization processing is performed on the partial image that has been subjected to the above processing, and in another step, labeling processing is performed. That is, using the pattern recognition, it is determined whether or not the above-mentioned emphasized pixels are continuously spread, and if the emphasized pixels are spread, an operation of specifying that it is corrosion is performed.

In the step (2), the number of pixels in the region identified as corroded in the labeling process in the step (2) is counted, and the area of one pixel calculated by the counted number of pixels is applied to determine the area of corrosion. Ask.

As described above, various types of defect information Iq (here, flaws) are applied to the entire container 1 by using a process for enhancing pixels having the same hue or luminance of an image, a process based on a contour line, or the like. Length and depth, dent area and depth, pinhole depth, corrosion area, corrosion depth,
In addition, the amount of wall thickness reduction due to corrosion and the position, radius and depth of the maximum wall thickness reduction are required. In addition, this thinning amount is a value obtained using the area and depth of the corroded portion and the cross section contour line.

Then, the evaluation object information calculating means 5 obtains the stress concentration value of each defect and the maximum stress concentration value among them based on the defect information Iq.

FIG. 9 is a flowchart showing a procedure for obtaining the maximum stress concentration value. First, in step S1, the evaluation target information calculation means 5 checks various defects (flaws, dents,
The defect shape is quantified based on data such as the depth, area, length of the pinhole and corrosion), and the outline of the section line.

Next, in step S2, a stress concentration value σs near the defect on the surface of the container 1 is calculated for each defect.

Subsequently, in step S3, a stress concentration value σf at the tip of the defect in the depth direction of the container 1 is calculated for each defect.

Then, in step S4, the largest one of the stress concentration values σs and σf obtained for all the defects of the container 1 or for all the defects of the entire container 1 is the maximum stress. The maximum stress concentration value σm is stored as the concentration value σm.

Next, the appearance determination and the withstand voltage determination performed by the evaluation means 6 using the various types of defect information will be described.

When the evaluation object information calculating means 5 obtains various kinds of defect information on the defects existing in the whole container 1, the evaluation means 6 calculates the total sum x of the flaw lengths from all the defect information.
1, maximum value of flaw depth x2, total sum of dent area x
3. Maximum value of dent depth x4, sum of corrosion area x
5. The maximum value x6 of the corrosion depth and the maximum value x7 of the pinhole depth are determined.

On the other hand, an appearance discriminant is registered in the evaluation criterion information registration unit 7 in advance. This appearance discriminant is expressed by the following equation (1) using the above x1 to x7.

[0047]

(Equation 1)

The above-mentioned appearance discriminant (1) is used to measure the defect of a container which failed in the conventional visual defect inspection (inspection of flaws, dents, corrosion, pinholes) and a container which passed the inspection. This is a formula determined statistically based on the database obtained as well as the history and attributes of the container. Here, examples of the history of the container include items such as the date of manufacture of the container, the date of the previous inspection, and the place of use (for business use such as a restaurant, for general household use). For example, items such as the type of container (for example, 20 kg or 50 kg) and the area of use (for example, Hokkaido or Kyushu). The coefficients m0 to m7 in Expression (1) take different values depending on the history and attributes of the container, and take the following values, for example.

M0 = 2.02 × 10 ⁻² , m1 = −5.7
7 × 10 ⁻⁴ , m2 = −3.26 × 10 ⁻¹ , m3 = 4.3
4 × 10 ⁻⁶ , m4 = −4.50 × 10 ⁻² , m5 = −2.
91 × 10 ⁻⁷ , m6 = −1.20 × 10 ⁻¹ , m7 = 5.
91 × 10 ^-3

The evaluation means 6 adds x to the appearance discriminant (1).
The values of 1 to x7 are substituted, and if y is positive, the container is determined to be a pass product, and if y is 0 or less, it is determined to be a reject product. As described above, by using the appearance discriminant (1), a plurality of defects generated in the container can be comprehensively evaluated and pass / fail judgment can be made instead of the visual defect inspection.

The pressure determination of the container 1 is performed as follows. That is, in the evaluation criterion information registration unit 7, a pressure-resistant discriminant set in correspondence with the part of the container 1 is registered in advance. For example, the following withstand pressure discriminant (2) is registered for the torso 14, and the following withstand pressure discriminant (3) is registered for the upper head plate 13.

[0052]

(Equation 2)

[0053]

(Equation 3)

Here, ω: ratio of the corroded area to the surface area of each part (corrosion rate,%), γ: ratio of the wall thinning amount to the volume of the container wall at each part (wall thinning rate,%), f: safety Rate (0 ≦ f ≦ 1).

The above-mentioned pressure-resistance discriminants (2) and (3) show that a large number of containers, for which the corrosion rate and the wall thinning rate are actually known as various values, can be used for a conventional pressure test (water injection into a container and filling with water). This is an empirical formula statistically created based on the data that was subjected to a test of actually checking the pressure resistance by applying pressure to the test and then sorting the data into pass and reject. The pressure resistance discriminants (2) and (3) are set for commonly used LP gas containers, and are set separately for other materials such as aluminum.

The evaluation means 6 uses the data of the corroded area and the wall thickness of each part obtained by the evaluation object information calculating means 5 and the data of the surface area and the plate thickness of each part of the container 1 registered in advance. The corrosion rate ω and the wall thinning rate γ at each part (in this case, the body and the upper end plate) are obtained, and the ω and γ are substituted into the pressure resistance discriminant, and D (D
If the value of (1, D2) is positive, corrosion at the site proceeds and the pressure resistance is not sufficient, so that it is determined to be a defective product, and if 0 or negative, the pressure resistance is sufficient and the product is acceptable. Is determined.

As described above, by using the withstand voltage discriminant,
It is possible to evaluate the pressure resistance of the container by substituting a pressure resistance test which requires complicated man-hours, and to judge whether or not it is acceptable.

Next, the remaining life evaluation performed by the evaluation means 6 will be described. The evaluation means 6 obtains the remaining life days of the container 1 by using data such as the maximum stress concentration value σm obtained by the evaluation target information calculation means 5 and the depth a0 at the defect having the maximum stress concentration value. Evaluate life.

FIG. 10 is a flowchart showing the procedure for calculating the remaining life days. The evaluation means 6 calculates the maximum stress concentration value σm (N / mm ² ) obtained by the evaluation target information calculation means 5,
Depth a0 (mm) at the defect having the maximum stress concentration value,
In addition, various data registered in advance, that is, the number of times Nyo is filled with gas into the container 1 per year, the thickness t0 (mm) of the container wall before use, the period T (year) until the next inspection, and the container wall are configured. Metal dissolution coefficient A (mm / time), metal dissolution coefficient B (Nmm ^−3/2 ), metal dissolution coefficient β (dimensionless), metal dissolution coefficient m (dimensionless), crack propagation rate determination coefficient a
Using 1 (mm), the average corrosion rate Ccor (mm / year), and the standard deviation σcor (mm) of the corrosion rate, it is determined by the following procedure.

First, the remaining life is obtained for each of the fatigue fracture of the defect having the maximum stress concentration value and the fracture when the corrosion effect is considered in the fatigue fracture (step S1).
1 to step S16).

In step S11, the depth a0 of the defect having the maximum stress concentration value is compared with the crack growth rate determining coefficient a1, and if a0 ≦ a1, the process proceeds to step S12.
If 0> a1, the process proceeds to step S13.

In step S12, the destruction life of the defect having the maximum stress concentration value (the number of times of gas filling until the defect is destroyed) Nf is obtained by using the following equation (4), and the process proceeds to step S14.

(Equation 4)

In step S13, as in step S12, the breaking life Nf of the defect having the maximum stress concentration value is determined using the following equation (5), and the flow advances to step S14.

(Equation 5)

In step S14, the number N of stress loadings per year
y is calculated using the following equation (6), and the process proceeds to step S15.

(Equation 6)

In step S15, the remaining life Mf (year) is obtained using the following equation (7), and the flow advances to step S16.

(Equation 7)

In step S 16, output data is created using the remaining life Mf, and “the remaining life against fatigue failure is XX.
Years / months, the remaining life for fatigue fracture considering the corrosion effect is XX years / months.

On the other hand, assuming that the defect having the maximum stress concentration value is a defect due to corrosion, the remaining life due to corrosion destruction is determined (steps S21 to S24).

In step S21, the remaining life Mc, I (years)
Is calculated using the following equation (8), and the process proceeds to step S22.

(Equation 8)

In step S22, the remaining life Mc, II (year)
Is calculated using the following equation (9), and the process proceeds to step S23.

(Equation 9)

In step S23, the remaining life Mc, III
(Year) is obtained using the following equation (10), and the process proceeds to step S24.

(Equation 10)

In step S24, the remaining lives Mc, I, Mc, I
Output data is created using I, Mc, and III.
The probability that c, I years or more is 50%, the remaining life is Mc, II years or more is 85%, and the remaining life is Mc, III years or more is 98% "is displayed.

Then, the evaluation means 6 makes a comprehensive evaluation based on the information on the remaining life obtained in steps S16 and S24, and judges the safety until the next inspection date.

As described above, in the embodiment of the present invention, measurement object information is obtained based on the measurement information of the container, and the container is evaluated using the measurement object information. The inspection of the high-pressure gas container can be performed easily and in a short time. In addition, the inspection can be performed with high accuracy according to objective criteria without depending on individual criteria. Furthermore, it is possible to reliably check for dangerous defects that are often overlooked.

Further, since the appearance information Ip is treated as the information to be measured and the pass / fail judgment is made by comparing it with the normal appearance reference information, the judgment can be made objectively without visual observation, and the personal information can be judged. A reliable inspection can be performed without any judgment.

Further, the defect information Iq is treated as information to be measured, and the defect information Iq is substituted into the appearance discriminant to obtain
Since the pass / fail judgment is performed, a plurality of defects generated in the container can be comprehensively evaluated and pass / fail judgment can be made in place of the visual defect inspection. And an accurate determination can be made.

Further, the defect information Iq is treated as information to be measured, and the corrosion rate and the wall thinning rate obtained from the defect information Iq are substituted into the pressure-resistance discriminant to determine the pass / fail. It is possible to evaluate the pressure resistance of the container by substituting the pressure test requiring a large number of man-hours, and it is possible to reduce the man-hour and cost required for the inspection.

Further, since the remaining life is evaluated based on the maximum stress concentration value obtained from the defect information, the defect which is most likely to be destroyed is evaluated, and the remaining life is accurately calculated with a high probability. can do. In addition, since the evaluation is performed based on the remaining life that could not be calculated conventionally, the evaluation is easy to understand, and the safety until the next inspection date can be reliably ensured.

In the above description, when obtaining the maximum stress concentration value, the defect of the entire part of the container 1 or the entire container 1 is determined based on the information measured by the cameras 22, 23, 24 and the laser scanner 25. However, instead of targeting all the defects of the parts and containers, the sampling area is limited to several places, and the defects existing in the sampling area are targeted. The maximum stress concentration value and the depth of the defect having the maximum stress concentration value may be efficiently obtained by using the statistical processing described above. In that case, an ultrasonic measurement may be performed on the sampling area, and the measurement may be performed based on the measurement information.

Further, steps S16 and S16 in FIG.
The display contents of 24 can be changed as needed.
When the high-pressure gas container is not made of steel but made of stainless steel or aluminum, the remaining life can be similarly evaluated by replacing the registered data such as the solubility coefficient.

[0080]

Since the present invention has the above-described configuration,
The following effects can be obtained.

According to the first aspect of the present invention, the information to be measured is obtained based on the measurement information of the high-pressure gas container, and the container is evaluated using the information to be measured. Therefore, the evaluation is automatically performed. The inspection of the high-pressure gas container can be performed easily and in a short time. In addition, the inspection can be performed with high accuracy according to objective criteria without depending on individual criteria. Furthermore, it is possible to reliably check for dangerous defects that are often overlooked.

According to the second aspect of the present invention, the appearance information is treated as the information to be measured, and the pass / fail judgment is made by comparing it with the normal appearance reference information. Therefore, the judgment is made objectively without visual observation. Can be performed, and a reliable inspection can be performed without depending on individual judgment.

In the invention according to claim 6, the defect information is treated as the information to be measured, and the defect information is substituted into the appearance discriminant to determine the pass / fail.
Instead of visual defect inspection, multiple defects generated in the high-pressure gas container can be comprehensively evaluated and pass / fail judgment can be made. Even if there are many kinds of defects, accurate judgment can be made in a short time it can.

Further, in the invention according to claim 7, the defect information is treated as the information to be measured, and the corrosion rate and the wall thinning rate obtained from the defect information are substituted into the pressure resistance discriminant to determine the pass / fail. Since it is performed, it is possible to evaluate the pressure resistance of the container by substituting the pressure test requiring complicated man-hours, and it is possible to reduce the man-hour and cost required for the inspection.

In the invention according to the eighth aspect, the remaining life is evaluated based on the maximum stress concentration value obtained from the defect information. Therefore, the defect which is most likely to be broken is evaluated. The remaining life can be accurately calculated with a high probability. In addition, since the evaluation is performed based on the remaining life that could not be calculated conventionally, the evaluation is easy to understand, and the safety until the next inspection date can be reliably ensured.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a high-pressure gas container to be evaluated.

FIG. 2 is an explanatory diagram of a high-pressure gas container to be evaluated.

FIG. 3 is a view schematically showing a container measuring system;
(A) is a front view, (b) is a side view.

FIG. 4 is a block diagram showing a configuration of a container evaluation device of the present invention.

FIG. 5 is an explanatory diagram showing appearance information and a procedure for evaluating the appearance information.

FIG. 6 is a diagram showing a procedure for obtaining a length of a defect in defect information.

FIG. 7 is a diagram showing a procedure for obtaining an area and a depth of a dent in defect information.

FIG. 8 is a diagram showing a procedure for obtaining a corroded area from defect information.

FIG. 9 is a flowchart showing a procedure for obtaining a maximum stress concentration value.

FIG. 10 is a flowchart showing a procedure for calculating the remaining life days.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-pressure gas container 11 Cap 12 Neck 13 Upper head plate 14 Body 15 Lower head plate 16 Skirt 17 Protector 3 Container evaluation device 4 Measurement information storage unit 5 Evaluation target information calculation means 6 Evaluation means 7 Evaluation reference information registration unit 20 Measurement system 21 Support Table 21a Roller 21b Rail 22 Color CCD video camera 23 Color CCD video camera 24 Color CCD video camera 25 Laser scanner

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hisako Asahi 2-3 Kandanishikicho, Chiyoda-ku, Tokyo Inside Fuji Research Institute, Inc. (72) Inventor Kazuhiro Seki 2-3 Kandanishikicho, Chiyoda-ku, Tokyo Fuji Research Institute In-house F term (reference) 2F065 AA04 AA49 AA54 BB06 DD06 FF42 GG04 JJ03 JJ05 JJ26 MM14 QQ08 QQ09 QQ17 QQ21 QQ25 QQ32 QQ39 RR08 UU05 2F069 AA43 AA46 AA60 AA96 BB40 DD15 GG07 A02 BB40 DD15 GG04 EA14 EB01 EB02 ED07 ED14 FA10

Claims (10)

[Claims] 1. A container evaluation device for inspecting and evaluating a high-pressure gas container, comprising: an evaluation criterion information registration unit for registering and storing evaluation criterion information of a high-pressure gas container prepared in advance; A measurement information storage unit for storing measurement information obtained and obtained by measurement, an evaluation target information calculating means for obtaining desired evaluation target information from the measurement information, and a high-pressure gas container based on the evaluation target information with reference to the evaluation reference information. A container evaluation device, comprising: an evaluation unit that performs evaluation of: 2. The measurement information storage section stores measurement information obtained from a non-contact three-dimensional measurement device, and the evaluation target information calculation means performs processing on the measurement information, and performs processing on the measurement information based on the processing information. The container evaluation device according to claim 1, wherein the appearance information is obtained as evaluation target information, and the evaluation unit performs pass / fail judgment evaluation of the high-pressure gas container by comparing the evaluation information with normal appearance reference information. 3. The container evaluation apparatus according to claim 2, wherein the external appearance information is information on at least one of a cap, a neck, an upper head plate, a trunk, a lower head plate, a skirt, and a protector of the high-pressure gas container. 4. The measurement information storage section stores measurement information obtained from a non-contact three-dimensional measurement device, and the evaluation target information calculation means performs processing on the measurement information, and stores the processing information of the high-pressure gas container based on the processing information. The container evaluation device according to claim 1, wherein defect information is obtained as evaluation target information. 5. The container evaluation device according to claim 4, wherein the defect information is information on at least one of corrosion, flaw, dent, and pinhole of the high-pressure gas container. 6. The defect information includes the area and thickness of corrosion, the length and depth of a flaw, the area and depth of a dent,
And the depth of the pinhole, wherein the evaluation means substitutes the sum or maximum value of the defect information into the appearance discriminant of the evaluation criterion information, and obtains the appearance discrimination value obtained at that time. The container evaluation device according to claim 4, wherein a pass / fail judgment evaluation of the high-pressure gas container is performed by comparing with a threshold for appearance determination. 7. The defect information is an area of corrosion and an amount of wall thinning, and the evaluation means includes a corrosion rate and a wall thinning rate obtained by using the defect information in a withstand pressure discriminant of evaluation reference information. 5. The container evaluation device according to claim 4, wherein the pressure determination value obtained at that time is compared with a threshold value for pressure resistance determination in the evaluation criterion information, and the pass / fail determination of the high-pressure gas container is evaluated. 8. The evaluation target information calculating means obtains, as defect information, corrosion, flaws, dents, and pinhole shapes and thickness reductions, and based on the data, a location where the stress concentration is maximum and the location where the stress concentration is maximized. The maximum stress concentration value is obtained, and the remaining life of the high-pressure gas container is obtained from the maximum stress concentration location and the maximum stress concentration value and the obtained history and attributes of the high-pressure gas container, and the obtained remaining life is used as evaluation target information. 4. The container evaluation device according to 1. 9. The container evaluation device according to claim 8, wherein the evaluation means determines and evaluates whether or not the high-pressure gas container maintains its life until the next inspection based on the remaining life of the high-pressure gas container. 10. The high pressure gas container according to claim 8, wherein the history of the high pressure gas container is the number of times of high pressure gas filling of the container so far, and the attribute is an original thickness, a material, and the like of a steel plate used for the container. Container evaluation device.