JP7237516B2 - Deterioration estimation device, deterioration estimation system, deterioration estimation method, and computer program - Google Patents

Description

TECHNICAL FIELD Embodiments of the present invention relate to deterioration estimation devices, deterioration estimation systems, deterioration estimation methods, and computer programs.

2. Description of the Related Art Resins such as unsaturated polyesters are used as insulating materials for power receiving and transforming devices such as switchgears. The insulation resistance of the surface of the resin decreases due to deterioration of the insulating material itself over time and environmental factors such as dust or contamination. A decrease in insulation resistance causes a ground fault or the like. Inspectors of substation equipment will measure the insulation resistance on site. However, on-site measurements are difficult because they depend on equipment outages and the local humidity environment. Therefore, a method of estimating the insulation resistance of the surface of an insulating material is used. In this method, characteristic values obtained from materials, such as glossiness or color difference, and information obtained from environments, such as fouling factors, temperature, or humidity, are indexed. In this method, the insulation resistance is estimated by performing multivariate analysis using indexed information as parameters. However, it is difficult to evaluate characteristic values obtained from insulating materials according to progress of deterioration. Therefore, this method may reduce the accuracy of insulation resistance estimation.

JP 2004-77469 A JP-A-2003-22587 Japanese Patent Publication No. 6-19323

The problem to be solved by the present invention is to provide a deterioration estimation device, a deterioration estimation system, a deterioration estimation method, and a computer program that can estimate the deterioration state of an insulating material with higher accuracy.

A degradation estimation device according to an embodiment has a spectrum acquisition unit, a degradation index determination unit, and an estimation unit. The spectrum acquisition unit acquires spectrum information in which the wavelength band of the light irradiated to the insulating material and the reflection intensity of the reflected light are associated with each other. The deterioration index determining unit determines a deterioration index representing a parameter of the deterioration state of the insulating material based on the difference in reflection intensity between the spectral information of the insulating material to be determined and the non-degraded spectral information obtained from the non-degraded insulating material. Determine your metrics. The deterioration index determination unit determines two wavelength bands in which a difference between the reflection intensity of the spectrum information and the reflection intensity of the undegraded spectrum information satisfies a predetermined condition, and based on the reflection intensities in the two wavelength bands, determines the Determine the degradation index. The estimator estimates the deterioration state of the insulating material based on the deterioration index.

FIG. 2 is a functional block diagram showing the functional configuration of the degradation estimation device 100 of the embodiment; The figure which shows one specific example of the multispectral sensor 40 of embodiment. The figure which shows one specific example of the electric equipment 10 of embodiment. FIG. 4 is a diagram showing a specific example of an insulating material to be estimated according to the embodiment; FIG. 4 is a diagram showing a specific example of spectral information in a target sample of the embodiment; 4 is a flowchart showing the flow of deterioration state estimation processing according to the embodiment;

DESCRIPTION OF THE PREFERRED EMBODIMENTS A deterioration estimation device, a deterioration estimation system, a deterioration estimation method, and a computer program according to embodiments will be described below with reference to the drawings.

FIG. 1 is a functional block diagram showing the functional configuration of the deterioration estimation device 100 of the embodiment. The deterioration estimating device 100 is communicably connected to the material property value measuring sensor 20, the environmental information measuring sensor 30, and the multispectral sensor 40. FIG. The deterioration estimating apparatus 100 acquires spectral information in an arbitrary wavelength band from the insulating material included in the electrical equipment 10 by controlling the connected multispectral sensor 40 . The deterioration estimation device 100 estimates the deterioration state of the insulating material of the electrical equipment 10 using the acquired spectrum information. The deterioration state of the insulating material may be represented by, for example, an insulation resistance value.

The electrical device 10 is configured by a power receiving and transforming device such as a switchgear. Electrical equipment 10 is surrounded by an insulating material. The electrical equipment 10 is supplied with high voltage and large current from the outside through a power cable. The electrical equipment 10 has a function of shutting off the current in the event of an abnormality. The electrical device 10 may be any device such as a vacuum circuit breaker, a power transformer, a gas insulated switchgear, a generator, an electric motor, a reactor, etc., as long as there is a possibility of generating a partial discharge. good too. The insulating material may be, for example, an unsaturated polyester or a resin such as an epoxy resin.

The material characteristic value measurement sensor 20 is a sensor that acquires material characteristic values related to color, such as a colorimeter, a color difference meter, or a colorimeter. The material characteristic value measurement sensor 20 acquires material characteristic values such as gloss or color difference of the insulating material by irradiating light on the insulating material included in the equipment to be inspected such as the electrical equipment 10 . Note that the material property value measured by the material property value measuring sensor 20 is not limited to glossiness or color difference. The material property value measurement sensor 20 may acquire any information as long as it is information relating to the color of the surface of the insulating material. A plurality of sensors may be used as the material property value measurement sensor 20 according to the material property value to be acquired.

The environmental information measuring sensor 30 is a sensor such as a thermometer or a hygrometer that acquires environmental information about the environment in the vicinity of its own device (environmental information measuring sensor 30). The environmental information measurement sensor 30 is provided near the electric device 10 , for example, to acquire environmental information such as temperature or humidity near the electric device 10 . Environmental information measured by the environmental information measuring sensor 30 is not limited to temperature or humidity. The environmental information measurement sensor 30 may acquire any information (for example, degree of pollution, sound volume, air volume, brightness, etc.) as long as it is information related to the environment. A plurality of sensors may be used as the environmental information measurement sensor 30 according to the environmental information to be acquired.

The multispectral sensor 40 is a sensor such as a multispectral camera or a hyperspectral camera that acquires reflection intensity in an arbitrary wavelength band. For example, the multispectral sensor 40 irradiates the insulating material included in the electrical equipment 10 with light in the wavelength band designated by the deterioration estimation device 100 . The multispectral sensor 40 acquires the reflection intensity of the light reflected by the device under test. The multispectral sensor 40 outputs the acquired reflection intensity to the deterioration estimation device. The multispectral sensor 40 is used in a configuration that is immune to external light. The multispectral sensor 40 is used in a configuration housed in a light shielding cover 50, for example. In the multispectral sensor 40, the distance between the light receiving element included in the multispectral sensor 40 and the insulating material included in the electrical device 10 may be maintained at a predetermined distance. The predetermined distance is, for example, 5 cm.

The deterioration estimation device 100 is an information processing device such as a personal computer, a smart phone, or a tablet computer. The deterioration estimating device 100 estimates the deterioration state of the insulating material included in the electrical equipment 10 based on the spectral information received from the multispectral sensor 40 . The deterioration estimation device 100 functions as a device including a communication unit 101, an input unit 102, a display unit 103, a characteristic information storage unit 104, and a control unit 105 by executing a deterioration estimation program.

A communication unit 101 is a network interface. A communication unit 101 communicates with an external communication device via a network. The communication unit 101 may communicate using a communication method such as a wireless LAN (Local Area Network), a wired LAN, Bluetooth (registered trademark), or LTE (Long Term Evolution) (registered trademark). The external communication device may be, for example, an information processing device such as a personal computer or a server, or may be a cloud computing system.

The input unit 102 is configured using an input device such as a touch panel, mouse, and keyboard. Input unit 102 may be an interface for connecting an input device to degradation estimation device 100 . In this case, input section 102 generates input data (for example, instruction information indicating an instruction to deterioration estimation apparatus 100 ) from an input signal input from an input device, and inputs the input data to deterioration estimation apparatus 100 .

A display unit 103 is an output device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, an organic EL (Electro Luminescence) display, or the like. The display unit 103 may be an interface for connecting an output device to the deterioration estimation device 100 . In this case, the display unit 103 generates a video signal from video data and outputs the video signal to a video output device connected thereto.

The characteristic information storage unit 104 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The characteristic information storage unit 104 stores characteristic information. The characteristic information is information representing estimation means for estimating the state of deterioration of the insulating material. Characteristic information is recorded for each insulating material. The estimator may be, for example, a multivariate formula. The deterioration state of the insulating material is estimated by substituting each value of the material characteristic value, the environmental information, or the spectral information into the formula. The formula of the estimating means is generated based on the diagnosis result obtained by the user diagnosing the insulating material of the electric device 10 so far. The estimating means may have means for estimating the remaining years of life of the electrical equipment 10 according to the estimated state of deterioration. The remaining years of life may be estimated from a table in which insulation resistance values and years of remaining life are associated with each other, or may be estimated from a mathematical formula using the insulation resistance value as a variable. The user may be, for example, an inspector who inspects the insulating material of the electrical equipment 10 .

Control section 105 controls the operation of each section of deterioration estimation apparatus 100 . The control unit 105 is executed by a device including a processor such as a CPU (Central Processing Unit) and a RAM (Random Access Memory). Control unit 105 functions as spectrum sensor control unit 106, material characteristic value acquisition unit 107, environment information acquisition unit 108, degradation index determination unit 109, and estimation unit 110 by executing a degradation estimation program.

Spectral sensor control section 106 acquires the reflection intensity from multispectral sensor 40 . First, spectrum sensor control section 106 transmits a wavelength band control instruction to multispectral sensor 40 . The wavelength band control instruction designates the wavelength band emitted from the light source of the multispectral sensor 40 . The spectrum sensor control unit 106 obtains the reflection intensity of the light emitted by the multispectral sensor 40 and reflected by the insulating material.

The spectral sensor control unit 106 generates spectral information that associates the wavelength band specified by the wavelength band control instruction with the reflection intensity acquired from the multispectral sensor 40 . Spectrum sensor control section 106 causes display section 103 to display the spectrum information. Note that the spectrum sensor control unit 106 may receive from the input unit 102 the wavelength band designated by the wavelength band control instruction. Note that the spectrum sensor control section 106 is one aspect of a spectrum acquisition section. The spectrum acquisition unit acquires spectrum information obtained by irradiating the insulating material with light.

The material characteristic value acquiring unit 107 acquires material characteristic values such as glossiness or color difference from the material characteristic value measuring sensor 20 . The material property value acquiring unit 107 may cause the display unit 103 to display the acquired material property values. The material characteristic value acquisition unit 107 outputs the material characteristic value to the deterioration index determination unit 109 .

The environment information acquisition unit 108 acquires environment information such as temperature or humidity from the environment information measurement sensor 30 . The environment information acquisition unit 108 may cause the display unit 103 to display the acquired environment information. Environmental information acquisition section 108 outputs the environmental information to degradation index determination section 109 .

The deterioration index determination unit 109 determines the deterioration index of the insulating material of the electrical device 10 by performing predetermined processing on multiple wavelength bands included in the spectrum information. The deterioration index is a parameter that visually represents the deterioration state of the insulating material. The deterioration index is used for estimating the deterioration state of the insulating material. The predetermined processing may be, for example, enhancement processing for reflection intensity. The deterioration index determining unit 109 determines that the difference between the peak intensity of the non-degraded spectral information obtained from the non-degraded insulating material and the peak intensity of the spectral information of the insulating material of the electrical device 10 to be diagnosed satisfies a predetermined condition. The time when it is satisfied is determined as the time when degradation occurs. The undegraded spectrum information may be recorded in the characteristic information storage unit 104, may be obtained from an external storage device, or may be obtained by any means. The predetermined condition may be, for example, whether or not the difference exceeds a predetermined value.

The deterioration index determination unit 109 determines two wavelength bands in which the difference between the reflection intensity of the spectrum information of the electrical device 10 and the reflection intensity of the undegraded spectrum information satisfies a predetermined condition. The deterioration index determination unit 109 determines a deterioration index based on the determined peak intensities of the reflection intensities of the two wavelength bands. A specific example of the predetermined condition will be described below. The deterioration index determination unit 109 identifies a wavelength band in which the difference value between the peak intensity of the reflection intensity of the spectrum information of the electrical device 10 and the peak intensity of the reflection intensity of the undegraded spectrum information is equal to or less than a predetermined first threshold. . The peak intensity of the reflection intensity of the spectral information of the electrical device 10 in the specified wavelength band is called the first reflection intensity. The deterioration index determination unit 109 identifies a wavelength band in which the difference value between the peak intensity of the reflection intensity of the spectrum information of the electrical device 10 and the peak intensity of the reflection intensity of the undegraded spectrum information is equal to or greater than a predetermined second threshold. . The peak intensity of the reflection intensity of the spectral information of the electrical device 10 in the specified wavelength band is called the second reflection intensity.

A deterioration index determination unit 109 determines a deterioration index based on the first reflection intensity and the second reflection intensity. Specifically, the deterioration index determination unit 109 divides the value obtained by subtracting the second reflection intensity from the first reflection intensity by the sum of the first reflection intensity and the second reflection intensity, and the result of the division is A deterioration index is determined by multiplying an arbitrary coefficient. Any count may be predetermined or may be received via the input unit 102 .

The estimation unit 110 estimates the state of deterioration of the insulating material of the electrical device 10 . Specifically, the estimating unit 110 acquires characteristic information about the insulating material of the electric device 10 from the characteristic information storage unit 104 . The estimating unit 110 acquires estimating means for estimating the state of deterioration of the insulating material of the electrical device 10 from the characteristic information. The estimation unit 110 inputs the material property values acquired by the material property value acquisition unit 107 to the estimation means. The estimation unit 110 inputs the environment information acquired by the environment information acquisition unit 108 to the estimation means. The estimation unit 110 inputs the deterioration index determined by the deterioration index determination unit 109 to the estimation means. The estimating unit 110 estimates the deterioration state of the insulating material of the electric device 10 by executing the estimating means. For example, when the estimating means is a formula, the estimating section 110 calculates the deterioration state by solving the formula. The calculated deterioration state is, for example, an insulation resistance value.

The estimation unit 110 estimates the remaining years of life of the electrical equipment 10 based on the deterioration state. For example, when the remaining years of life are represented by a table in which the years of remaining life are associated with the deterioration state, the estimating unit 110 estimates the years of remaining life by acquiring the years of remaining life from the table according to the deterioration state. For example, when the remaining years of life are represented by a mathematical formula with the state of deterioration as a variable, the estimating unit 110 estimates the years of remaining life by solving the mathematical formula. The estimation unit 110 causes the display unit 103 to display the calculated state of deterioration or remaining years of life.

FIG. 2 is a diagram showing a specific example of the multispectral sensor 40 of the embodiment. Multispectral sensor 40 is, for example, a multispectral camera. Multispectral sensor 40 includes a plurality of light sources 41 and light receiving elements 42 .

The light source 41 emits light in a predetermined wavelength band. The light source 41 is, for example, an LED (Light Emitting Diode) light. The multiple light sources 41 emit light in different wavelength bands. When the multispectral sensor 40 receives the wavelength band control instruction from the spectrum sensor control unit 106, the light source 41 capable of emitting light in the designated wavelength band emits light.

The light receiving element 42 converts the intensity of light into an electrical signal. The light receiving element 42 receives reflected light of the light emitted by the light source 41 . The light receiving element 42 transmits the intensity of the received light to the degradation estimation device 100 as the reflection intensity.

FIG. 3 is a diagram showing a specific example of the electrical equipment 10 of the embodiment. The electric device 10 shown in FIG. 3 is a vacuum circuit breaker (VCB). The electrical equipment 10 comprises an insulating material 11 and a vacuum circuit breaker body 12 . A vacuum circuit breaker body 12 is partitioned by an insulating material 11 . Vacuum circuit breaker body 12 is insulated by insulating material 11 . The deterioration estimating apparatus 100 acquires spectral information by irradiating the insulating material 11 with light.

FIG. 4 is a diagram showing a specific example of an insulating material to be estimated according to the embodiment. Figure 4 is an unsaturated polyester. FIG. 4(a) shows unsaturated polyester in an undegraded state. FIG. 4(b) is the unsaturated polyester in a degraded state. The unsaturated polyester shown in FIG. 4(b) was acceleratedly degraded in a test tank or the like. According to FIG. 4, it can be seen that the color of the unsaturated polyester changes depending on the state of deterioration. The obtained spectral information thus makes it possible to estimate the state of deterioration of the insulating material.

FIG. 5 is a diagram showing a specific example of spectral information in the target sample of the embodiment. The target sample (insulating material) used in FIG. 5 is unsaturated polyester. In FIG. 5, an undegraded product that has not been degraded, a thermally degraded product that has been thermally degraded, and each unsaturated polyester are used as target samples. It can be seen that the heat-degraded unsaturated polyester has an increased reflection intensity in the wavelength bands near 850 nm and 950 nm compared to the non-degraded product. Thermal aging reduces the unsaturated polyester near the surface of the target sample. For this reason, inorganic substances such as calcium carbonate and aluminum hydroxide added as fillers to the target sample relatively increase. Therefore, it is considered that the reflection intensity in the near-infrared region near 850 nm and near 950 nm increased.

On the other hand, for example, in the vicinity of 800 nm, there is no significant difference in reflection intensity between the undegraded product and the heat-degraded product. Therefore, the deterioration index determining unit 109 determines the reflection intensity of two wavelength bands: a wavelength band (for example, 850 nm) in which the reflection intensity increases due to thermal deterioration and a wavelength band (for example, 800 nm) in which the difference in reflection intensity due to thermal deterioration is small. to get The deterioration index determination unit 109 indexes the deterioration of the insulating material by performing enhancement processing using the formulated spectrum calculation formula. A spectrum calculation formula is represented by following Numerical formula (1), for example. Here, the reflection intensity at 800 nm is the first reflection intensity described above. The reflection intensity at 850 nm is the second reflection intensity mentioned above.

Degradation index=(Reflection intensity at 800 nm−Reflection intensity at 850 nm)/(Reflection intensity at 800 nm+Reflection intensity at 850 nm) (1)

FIG. 6 is a flowchart showing the flow of processing for estimating the state of deterioration according to the embodiment. Spectrum sensor control section 106 generates spectrum information based on the wavelength band specified by the wavelength band control instruction and the reflection intensity obtained from multispectral sensor 40 . (Step S101). The deterioration index determination unit 109 determines the deterioration index of the insulating material of the electrical device 10 by performing a predetermined process on multiple wavelengths included in the spectrum information (step S102). The material characteristic value acquiring unit 107 acquires material characteristic values such as glossiness or color difference from the material characteristic value measuring sensor 20 (step S103). The environment information acquisition unit 108 acquires environment information such as temperature or humidity from the environment information measurement sensor 30 (step S104).

The estimating unit 110 acquires characteristic information regarding the insulating material of the electric device 10 from the characteristic information storage unit 104 . The estimating unit 110 acquires the estimating means from the characteristic information (step S105). The estimating unit 110 inputs the deterioration index, the material characteristic value, and the environmental information into the estimating means. The estimating unit 110 estimates the deterioration state of the insulating material of the electric device 10 by executing the estimating means (step S106). The estimation unit 110 estimates the remaining years of life of the electrical equipment 10 based on the deterioration state (step S107). The estimation unit 110 causes the display unit 103 to display the calculated state of deterioration or remaining years of life (step S108).

In the deterioration estimating apparatus 100 configured as described above, the spectral sensor control unit 106 generates spectral information based on the reflection intensity of light acquired from the insulating material. The insulating material changes color as it ages. Therefore, the spectral sensor control unit 106 generates different spectral information depending on the state of deterioration of the insulating material. A deterioration index determination unit 109 determines a deterioration index for estimating the deterioration state of the insulating material based on the generated spectrum information. The estimating unit 110 estimates the deterioration state of the insulating material using conventionally used parameters such as material property values and environmental information, and the determined deterioration index. Therefore, it becomes possible to estimate the deterioration state of the insulating material with higher accuracy.

In the above-described embodiments, the deterioration estimation device 100 may be a device (for example, a smart phone) that includes an imaging unit such as a camera. In this case, the deterioration estimation device 100 may transmit the acquired information (for example, spectrum information, material property values, or environmental method) to an external cloud server or the like. In this case, the deterioration state of the insulating material of the electrical device 10 is estimated by an application on the cloud server.

The deterioration estimating apparatus 100 may display the estimation result of the insulating material of the electric device 10 on the smartphone owned by the user, or may transmit it to an external cloud server. When transmitted to an external cloud server, the cloud server causes the terminal device owned by the user to display the estimation result.

The estimation unit 110 may associate the deterioration state, the date and time, the sample ID, and the sample type and record them in the storage device. The date and time represents the date and time when the deterioration state was estimated. A sample ID is an identifier of a resin material. The sample type represents a resin material such as unsaturated polyester. By being configured in this manner, the deterioration estimation apparatus 100 can use the past estimation results to determine the progress of deterioration of the insulating material, and to predict the progress of deterioration in the future.

Spectral sensor control 106 may be configured to collect spectral information for multiple locations in the insulating material of electrical device 10 . With such a configuration, local discoloration of the insulating material can be detected. Therefore, when non-uniform deterioration occurs in the insulating material, the user can grasp the non-uniform deterioration.

The deterioration estimation device 100 may be implemented using a plurality of information processing devices communicably connected via a network. In this case, each functional unit included in the deterioration estimation apparatus 100 may be distributed and implemented in a plurality of information processing apparatuses. For example, the deterioration index determining unit 109 and the estimating unit 110 may be implemented in different information processing devices.

In each of the embodiments described above, the spectrum sensor control unit 106, the deterioration index determination unit 109, and the estimation unit 110 are assumed to be software function units, but they may be hardware function units such as LSI.

According to at least one of the embodiments described above, having the spectrum sensor control unit 106, the deterioration index determination unit 109, and the estimation unit 110 makes it possible to estimate the deterioration state of the insulating material with higher accuracy.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Degradation estimation system 10... Electric equipment 20... Material characteristic value measurement sensor 30... Environmental information measurement sensor 40... Multispectral sensor 50... Light shielding cover 100... Degradation estimation apparatus 101... Communication part 102... Input unit 103 Display unit 104 Property information storage unit 105 Control unit 106 Spectrum sensor control unit 107 Material property value acquisition unit 108 Environment information acquisition unit 109 Deterioration index determination unit 110 … Estimation part

Claims (5)

a spectrum acquisition unit that acquires spectrum information that associates the wavelength band of the light with which the insulating material is irradiated and the reflection intensity of the reflected light of the light;
A deterioration index for determining a deterioration index representing a deterioration state parameter of the insulating material based on a difference in reflection intensity between the spectral information of the insulating material to be determined and the non-degraded spectral information obtained from the non-degraded insulating material. a decision unit;
an estimation unit that estimates the deterioration state of the insulating material based on the deterioration index;
with
The deterioration index determination unit determines two wavelength bands in which a difference between the reflection intensity of the spectrum information and the reflection intensity of the undegraded spectrum information satisfies a predetermined condition, and based on the reflection intensities in the two wavelength bands, determine the deterioration index ,
The deterioration index determining unit determines a first reflection intensity of the wavelength band of the spectrum information so that the difference is equal to or less than a predetermined first threshold, and determining the deterioration index based on the second reflection intensity of the information wavelength band;
The deterioration index determination unit divides the value obtained by subtracting the second reflection intensity from the first reflection intensity by the sum of the first reflection intensity and the second reflection intensity, and A deterioration estimation device that determines the deterioration index by multiplying a predetermined coefficient by a predetermined coefficient . The spectrum acquisition unit collects spectrum information of a plurality of locations of the insulating material,
The degradation estimating device according to claim 1 . a sensor that irradiates an insulating material with light and acquires the reflection intensity of the reflected light of the light;
a spectrum acquisition unit that acquires spectrum information that associates the wavelength band of light with which the insulating material is irradiated with the reflection intensity;
A deterioration index for determining a deterioration index representing a deterioration state parameter of the insulating material based on a difference in reflection intensity between the spectral information of the insulating material to be determined and the non-degraded spectral information obtained from the non-degraded insulating material. a decision unit;
an estimation unit that estimates the deterioration state of the insulating material based on the deterioration index;
with
The deterioration index determination unit determines two wavelength bands in which a difference between the reflection intensity of the spectrum information and the reflection intensity of the undegraded spectrum information satisfies a predetermined condition, and based on the reflection intensities in the two wavelength bands, determine the deterioration index ,
The deterioration index determining unit determines a first reflection intensity of the wavelength band of the spectrum information so that the difference is equal to or less than a predetermined first threshold, and determining the deterioration index based on the second reflection intensity of the information wavelength band;
The deterioration index determination unit divides the value obtained by subtracting the second reflection intensity from the first reflection intensity by the sum of the first reflection intensity and the second reflection intensity, and A deterioration estimation system that determines the deterioration index by multiplying a predetermined coefficient by a predetermined coefficient . a spectrum acquisition step in which the deterioration estimation device acquires spectrum information in which the wavelength band of the light irradiated to the insulating material and the reflection intensity of the reflected light of the light are associated;
A deterioration index representing a parameter of the deterioration state of the insulating material, based on the difference in reflection intensity between the spectral information of the insulating material to be determined and the non-degraded spectral information obtained from the non-degraded insulating material. a deterioration index determination step for determining
an estimating step in which the deterioration estimating device estimates the deterioration state of the insulating material based on the deterioration index;
has
In the deterioration index determination step, two wavelength bands are determined in which a difference between the reflection intensity of the spectral information and the reflection intensity of the undegraded spectral information satisfies a predetermined condition, and based on the reflection intensities in the two wavelength bands, determine the deterioration index ,
In the deterioration index determination step, the first reflection intensity of the wavelength band of the spectrum information is set so that the difference is a predetermined first threshold or less, and the spectrum is set so that the difference is a predetermined second threshold or more. determining the deterioration index based on the second reflection intensity of the information wavelength band;
In the deterioration index determination step, the value obtained by subtracting the second reflection intensity from the first reflection intensity is divided by the sum of the first reflection intensity and the second reflection intensity, and the result of the division is and determining the deterioration index by multiplying by a predetermined coefficient . A computer program for causing a computer to function as the deterioration estimation device according to claim 1 or 2 .

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