Terminal and method for monitoring health of immovable cultural relics

Abstract

This invention discloses a terminal and method for monitoring the health of immovable cultural relics, relating to the field of cultural relic health technology. It acquires cultural relic status data, obtains a status health coefficient based on the data, acquires an image set of the immovable cultural relic, obtains a usable image set from the image set, obtains an image health coefficient from the usable image set, acquires the acoustic signal of the immovable cultural relic, obtains an acoustic image from the acoustic signal, and obtains an acoustic health coefficient from the acoustic image. The health of the immovable cultural relic is then determined using fuzzy logic based on the status health coefficient, image health coefficient, and acoustic health coefficient. This multi-faceted assessment of the health of immovable cultural relics ensures accurate monitoring, enabling timely protection, restoration, and management, thus extending the preservation time of the relics.

Description

Technical Field

[0001] The invention belongs to the technical field of cultural relics health monitoring, and in particular relates to a terminal and method for monitoring the health of immovable cultural relics. Background Art

[0002] Immovable cultural relics refer to those cultural relics that cannot be easily moved or transferred due to their size, weight or special properties. These cultural relics are usually closely related to a specific place or building, such as stone carvings, murals, inscriptions, stone tablets, stone lions, etc. fixed to the building. In the protection and management of cultural relics, immovable cultural relics often need to be protected, repaired and managed on the spot to ensure that they are well preserved and not damaged. Therefore, real-time monitoring of the health of immovable cultural relics is very important; the existing real-time monitoring of the health of immovable cultural relics is often to collect data on the surface and surroundings of immovable cultural relics through sensors to determine whether there is a problem with the health of immovable cultural relics. If there is a problem with the health of immovable cultural relics, the staff will be reminded in time to protect, repair and manage the immovable cultural relics on the spot, so as to ensure that the cultural relics can be preserved for a long time.

[0003] However, the above-mentioned real-time monitoring of the health of immovable cultural relics often only relies on sensors to analyze the data on the surface and surrounding of the immovable cultural relics to determine whether there is a problem with the health of the immovable cultural relics. The health of the immovable cultural relics is not monitored and evaluated from multiple aspects. This unilateral judgment may lead to inaccurate monitoring of the health of immovable cultural relics, thereby affecting the protection, restoration and management of the immovable cultural relics, resulting in a shorter preservation time of the cultural relics. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the health of immovable cultural relics is not monitored and evaluated from multiple aspects. Such unilateral judgment may lead to inaccurate monitoring of the health of immovable cultural relics, thereby affecting the protection, restoration and management of immovable cultural relics, resulting in a shorter preservation time of cultural relics. A terminal and method for monitoring the health of immovable cultural relics are proposed.

[0005] In a first aspect of the present invention, a method for monitoring the health of immovable cultural relics is first proposed, the method comprising:

[0006] Acquire cultural relic status data, and obtain a status health coefficient according to the cultural relic status data; the cultural relic status data includes at least one of a conductivity variation coefficient, a volume floating coefficient, and an oxygen absorption acceleration coefficient;

[0007] Acquire an image set of immovable cultural relics, obtain a usable image set based on the image set, and obtain an image health coefficient based on the usable image set;

[0008] Acquiring an acoustic wave signal of an immovable cultural relic, obtaining an acoustic wave image according to the acoustic wave signal, and obtaining an acoustic wave health coefficient according to the acoustic wave image;

[0009] The state health coefficient, the image health coefficient and the sound wave health coefficient are used to determine the health of the immovable cultural relics through fuzzy logic.

[0010] Optionally, acquiring cultural relic status data, and obtaining a status health coefficient according to the cultural relic status data includes:

[0011] Obtaining the conductivity of the immovable cultural relic and a corresponding preset conductivity range, and comparing the conductivity with the corresponding preset conductivity range, and obtaining a conductivity variation coefficient according to the comparison result;

[0012] Obtaining the volume size of the immovable cultural relic and the corresponding preset volume size range, and comparing the volume size with the corresponding preset volume size range, and obtaining the volume floating coefficient according to the comparison result;

[0013] Continuously obtain the oxygen absorption content of the immovable cultural relics to obtain an oxygen absorption content sequence; calculate the first-order difference between adjacent data in the oxygen absorption content sequence, and collect the specific values ​​of the corresponding first-order differences to obtain a preliminary set, and then perform first-order difference calculation on the data in the preliminary set to obtain a valid set; calculate the discrete value of the data in the valid set, and calculate the ratio of the discrete value to the number of time periods to obtain the oxygen absorption acceleration coefficient

[0014] The conductivity variation coefficient, the volume floating coefficient and the oxygen absorption acceleration coefficient are weighted and summed to obtain a state health coefficient.

[0015] Optionally, acquiring the acoustic wave signal of the immovable cultural relic and obtaining the acoustic wave image according to the acoustic wave signal comprises:

[0016] The ultrasonic transmitter emits sound waves to penetrate the immovable cultural relics, and the ultrasonic reflector captures the reflected signals to obtain sound wave signals;

[0017] The acoustic wave signal is subjected to wavelet transformation and short-time Fourier transformation to obtain the time-frequency transformation result:

[0018]

[0019] In the formula, S(τ, ρ) represents the time-frequency variation result, x(t) represents the time domain function, and f represents the frequency;

[0020] According to the time-frequency change results, the sound wave signal is converted into a time-frequency energy spectrum to obtain a sound wave image, and the sound wave image is compared with a preset sound wave image to compare the shape, frequency distribution, and energy distribution of the spectrum, and the sound wave health coefficient is calculated according to the preset weight ratio.

[0021] Optionally, determining the health of the immovable cultural relic by using the state health coefficient, the image health coefficient and the sound wave health coefficient through fuzzy logic includes:

[0022] The health of immovable cultural relics is defined as the output variable and divided into fuzzy sets;

[0023] Formulate fuzzy rules to describe the impact of different input variables on output variables;

[0024] Fuzzy reasoning is performed based on fuzzy rules to output the health of immovable cultural relics.

[0025] In a second aspect of the implementation of the present invention, a terminal for monitoring the health of immovable cultural relics is proposed, which includes a conductivity sensor, a laser scanner, a gas sensor, a high-resolution camera, an ultrasonic transmitter, an ultrasonic reflector and a server.

[0026] Beneficial effects of the present invention:

[0027] The present invention proposes a terminal and method for monitoring the health of immovable cultural relics, which determine the health of immovable cultural relics through fuzzy logic using a state health coefficient, an image health coefficient and an acoustic health coefficient, and monitors and evaluates the health of immovable cultural relics from multiple aspects. This multi-faceted judgment makes the monitoring effect of the health of immovable cultural relics accurate, and can timely protect, repair and manage the immovable cultural relics, so that the cultural relics can be preserved for a longer time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 A flow chart of a method for monitoring the health of immovable cultural relics is provided for an embodiment of the present invention;

[0030] Figure 2 This is a structural diagram of an immovable cultural relic health monitoring terminal provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The embodiment of the present invention provides a method for monitoring the health of immovable cultural relics. Figure 1 , Figure 1 A flow chart of a method for monitoring the health of immovable cultural relics provided by an embodiment of the present invention. The method comprises:

[0032] Acquire the state data of cultural relics, and obtain the state health coefficient according to the state data of cultural relics;

[0033] Obtain an image set of immovable cultural relics, obtain a usable image set according to the image set, and obtain an image health coefficient according to the usable image set;

[0034] Acquire the acoustic wave signal of the immovable cultural relic, obtain the acoustic wave image according to the acoustic wave signal, and obtain the acoustic wave health coefficient according to the acoustic wave image;

[0035] The state health coefficient, image health coefficient and sound wave health coefficient are used to determine the health of immovable cultural relics through fuzzy logic.

[0036] In one implementation method, the state health coefficient, image health coefficient and sound wave health coefficient are used to determine the health of immovable cultural relics through fuzzy logic, and the health of the immovable cultural relics is monitored and evaluated from multiple aspects. This multi-faceted judgment makes the monitoring of the health of immovable cultural relics accurate, and can timely protect, repair and manage immovable cultural relics, so that the cultural relics can be preserved for a longer period of time.

[0037] In one embodiment, obtaining the cultural relic status data and obtaining the status health coefficient according to the cultural relic status data includes:

[0038] Obtaining the conductivity of the immovable cultural relic and a corresponding preset conductivity range, and comparing the conductivity with the corresponding preset conductivity range, and obtaining a conductivity variation coefficient according to the comparison result;

[0039] Obtaining the volume size of the immovable cultural relic and the corresponding preset volume size range, and comparing the volume size with the corresponding preset volume size range, and obtaining the volume floating coefficient according to the comparison result;

[0040] Continuously obtain the oxygen absorption content of the immovable cultural relics to obtain an oxygen absorption content sequence; calculate the first-order difference between adjacent data in the oxygen absorption content sequence, and collect the specific values ​​of the corresponding first-order differences to obtain a preliminary set, and then perform first-order difference calculation on the data in the preliminary set to obtain a valid set; calculate the discrete value of the data in the valid set, and calculate the ratio of the discrete value to the number of time periods to obtain the oxygen absorption acceleration coefficient;

[0041] The health coefficients obtained based on the status data of cultural relics include:

[0042] The conductivity variation coefficient, volume fluctuation coefficient and oxygen absorption acceleration coefficient are weighted and summed to obtain the state health coefficient.

[0043] In one implementation, the preset conductivity range is the conductivity range of the immovable cultural relics determined by professionals according to actual conditions; because in actual conditions, in some cases, salt may accumulate on the surface of stones and other mineral cultural relics, and these salts may affect the conductivity. Monitoring the change in conductivity can help evaluate the salt content and related corrosion risks. If the conductivity change is greater than the preset range, it means that there may be a problem with the health of the immovable cultural relics. Therefore, the conductivity of the immovable cultural relics is obtained by a conductivity sensor, and then the conductivity of the immovable cultural relics is compared with the corresponding preset conductivity range to obtain a conductivity variation coefficient, which can reflect the health of the immovable cultural relics; the conductivity variation coefficient is calculated by subtracting the actual conductivity of the immovable cultural relics from the maximum value of the corresponding preset conductivity range to obtain the conductivity variation coefficient;

[0044] In one implementation, the preset volume range refers to the volume of the immovable cultural relics determined by professionals according to the actual situation. Generally, the volume of the immovable cultural relics will not change. If there is a problem with the volume of the immovable cultural relics, it means that there may be a problem with the health of the immovable cultural relics. If the cultural relics may have suffered external impact or internal damage, resulting in changes in their structure, thereby causing the volume of the immovable cultural relics. If the cultural relics are eroded by organisms, it may cause a change in volume. Therefore, the health of the immovable cultural relics can be indirectly reflected by the volume of the immovable cultural relics. The calculation method of the volume floating coefficient is to compare the volume of the immovable cultural relics with the corresponding preset volume range. If the volume of the immovable cultural relics is not within the preset volume range, it means that there is a problem. If the volume of the immovable cultural relics is smaller than the preset volume range, the absolute difference between the volume of the immovable cultural relics and the minimum value of the preset volume range is calculated as the volume floating coefficient; if the volume of the immovable cultural relics is larger than the preset volume range, the absolute difference between the volume of the immovable cultural relics and the maximum value of the preset volume range is calculated as the volume floating coefficient; the volume of the immovable cultural relics can be obtained by a laser scanner.

[0045] In one implementation method, since immovable cultural relics will absorb some oxygen during the actual storage process, if the immovable cultural relics absorb oxygen too quickly, it means that there may be a problem with the health of the immovable cultural relics; therefore, the health of the immovable cultural relics can be judged by judging the oxygen absorption rate of the immovable cultural relics; the data related to oxygen acquisition and oxygen absorption of the immovable cultural relics can be analyzed through gas sensors.

[0046] In one embodiment, acquiring an image set of immovable cultural relics, obtaining a usable image set according to the image set, and obtaining an image health coefficient according to the usable image set includes:

[0047] Acquire images of immovable cultural relics multiple times according to preset directions and angles, and collect images with the same direction and angle to obtain multiple preliminary sets of similar images;

[0048] Calculate the similarities between all images in each preliminary similar image set, and superimpose the similarities of each image in the preliminary similar image set with respect to other images to obtain the sum of the similarities of each image, sort the sum of the similarities of each image, and remove images with lower sums of similarities to obtain a similar image set;

[0049] In one implementation, a high-resolution camera is used to shoot the immovable cultural relics multiple times in a preset direction and angle, and then the images with a lower sum of similarities are screened. This method can accurately screen some problematic images, making the obtained images more reliable, because the images with poor quality or problems have been eliminated, which can improve the accuracy of subsequent analysis and application. In addition, the preset direction and angle are set by professionals according to the actual situation.

[0050] All images in the same type of image set are superimposed, and the average values ​​of pixel points and pixel positions are calculated. The image is regenerated according to the average values ​​of pixel points and pixel positions to obtain a usable image; the above steps are repeated to obtain usable images in different directions and angles, and all the usable images are combined to obtain a usable image set;

[0051] Match the texture of each image in the available image set with the preset image, and calculate the area of ​​the region where the textures do not overlap to obtain a texture matching error set;

[0052] Perform a weighted summation on each data in the above texture matching error set and the corresponding image shooting angle to obtain the unhealthy coefficient of each image, and perform a weighted summation on the unhealthy coefficient of each image to obtain the image health coefficient.

[0053] In one implementation, by superimposing images in the same image set and calculating the average value of the pixels, the noise and distortion in the image can be effectively repaired to obtain a clearer and smoother image, and the regenerated image has higher quality and usability; through texture matching, it is possible to detect whether the textures in the image overlap, so as to find problems in the image, such as damage, missing or offset, which can improve the accurate assessment of the surface state of the cultural relic; by calculating the weighted sum of the area and angle of the texture matching error, the image health coefficient is obtained. This quantitative assessment helps to quantify the degree of damage to the surface of the cultural relic and provide guidance for subsequent protection and restoration work.

[0054] In one embodiment, obtaining the acoustic wave signal of the immovable cultural relic and obtaining the acoustic wave image according to the acoustic wave signal includes:

[0055] The ultrasonic transmitter emits sound waves to penetrate the immovable cultural relics, and the ultrasonic reflector captures the reflected signals to obtain sound wave signals;

[0056] Perform wavelet transform and short-time Fourier transform on the sound wave signal to obtain the time-frequency change result:

[0057]

[0058] In the formula, S(τ, ρ) represents the time-frequency variation result, x(t) represents the time domain function, and f represents the frequency;

[0059] According to the time-frequency change results, the sound wave signal is converted into a time-frequency energy spectrum to obtain a sound wave image. The sound wave image is compared with the preset sound wave image to compare the shape, frequency distribution, and energy distribution of the spectrum. The sound wave health coefficient is calculated according to the preset weight ratio.

[0060] In one implementation, the use of ultrasonic transmitters and reflectors is a non-destructive evaluation method that will not cause any damage to cultural relics and is suitable for health assessment of immovable cultural relics; the time-frequency change results can provide rich information, including changes in frequency, energy, etc., so the health of cultural relics can be comprehensively evaluated; sound waves can penetrate materials and capture reflected signals inside the materials, so the internal structure and state of cultural relics can be evaluated, including implicit damage or defects; in addition, through the above formula, the ultrasonic time domain signal can be accurately converted into a time-frequency spectrum, which has a significant recognition effect; it should also be noted that the preset weight ratio is set by professionals according to the actual situation.

[0061] In one embodiment, determining the health of the immovable cultural relic by using the state health coefficient, the image health coefficient and the sound wave health coefficient through fuzzy logic includes:

[0062] The health of immovable cultural relics is defined as the output variable and divided into fuzzy sets;

[0063] Formulate fuzzy rules to describe the impact of different input variables on output variables;

[0064] Fuzzy reasoning is performed based on fuzzy rules to output the health of immovable cultural relics.

[0065] In one implementation, the health of immovable cultural relics is output in this way, the influence of multiple input variables is comprehensively considered, and flexible reasoning and decision-making are performed, so as to more comprehensively and accurately evaluate the health status of cultural relics.

[0066] Based on the same inventive concept, the embodiment of the present invention also provides a terminal for monitoring the health of immovable cultural relics. Figure 2 , Figure 2 A schematic structural diagram of an immovable cultural relic health monitoring terminal provided in an embodiment of the present invention, wherein the terminal includes a conductivity sensor, a laser scanner, a gas sensor, a high-resolution camera, an ultrasonic transmitter, an ultrasonic reflector and a server.

[0067] The server is connected with the conductivity sensor, the laser scanner, the gas sensor, the high-resolution camera, the ultrasonic transmitter, and the ultrasonic reflector signals to analyze the above-obtained results.

[0068] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for monitoring the health of immovable cultural relics, characterized in that: include: Acquire cultural relic status data, and obtain a status health coefficient according to the cultural relic status data; the cultural relic status data includes at least one of a conductivity variation coefficient, a volume floating coefficient, and an oxygen absorption acceleration coefficient; Acquire an image set of immovable cultural relics, obtain a usable image set based on the image set, and obtain an image health coefficient based on the usable image set; Acquiring an acoustic wave signal of an immovable cultural relic, obtaining an acoustic wave image according to the acoustic wave signal, and obtaining an acoustic wave health coefficient according to the acoustic wave image; Determine the health of the immovable cultural relics by using the state health coefficient, the image health coefficient and the sound wave health coefficient through fuzzy logic; The health coefficient of the state obtained according to the state data of the cultural relics includes: Obtaining the conductivity of the immovable cultural relic and a corresponding preset conductivity range, and comparing the conductivity with the corresponding preset conductivity range, and obtaining a conductivity variation coefficient according to the comparison result; Obtaining the volume size of the immovable cultural relic and the corresponding preset volume size range, and comparing the volume size with the corresponding preset volume size range, and obtaining the volume floating coefficient according to the comparison result; Continuously acquiring the oxygen absorption content of the immovable cultural relics to obtain an oxygen absorption content sequence; calculating the first-order difference between adjacent data in the oxygen absorption content sequence, and grouping the specific values ​​of the corresponding first-order differences to obtain a preliminary set, and then performing first-order difference calculation on the data in the preliminary set to obtain a valid set; calculating the discrete value of the data in the valid set, and calculating the ratio of the discrete value to the number of time periods to obtain the oxygen absorption acceleration coefficient; The health coefficient of the state obtained according to the state data of the cultural relics includes: The conductivity variation coefficient, the volume floating coefficient and the oxygen absorption acceleration coefficient are weighted and summed to obtain a state health coefficient.

2. The method for monitoring the health of immovable cultural relics according to claim 1, characterized in that: Acquiring an image set of immovable cultural relics, obtaining a usable image set according to the image set, and obtaining an image health coefficient according to the usable image set includes: Acquire images of immovable cultural relics multiple times according to preset directions and angles, and collect images with the same direction and angle to obtain multiple preliminary sets of similar images; Calculate the similarities between all images in each preliminary similar image set, and superimpose the similarities of each image in the preliminary similar image set with respect to other images to obtain the sum of the similarities of each image, sort the sum of the similarities of each image, and remove images with lower sums of similarities to obtain a similar image set; All images in the same type of image set are superimposed, and the average values ​​of pixel points and pixel positions are calculated. The image is regenerated according to the average values ​​of pixel points and pixel positions to obtain a usable image; the above steps are repeated to obtain usable images in different directions and angles, and all the usable images are combined to obtain a usable image set; Performing texture matching on each image in the available image set and a preset image, and calculating the area of ​​regions where the textures do not overlap, to obtain a texture matching error set; Perform a weighted summation on each data in the above texture matching error set and the corresponding image shooting angle to obtain the unhealthy coefficient of each image, and perform a weighted summation on the unhealthy coefficient of each image to obtain the image health coefficient.

3. The method for monitoring the health of immovable cultural relics according to claim 1, characterized in that: Acquiring the acoustic wave signal of the immovable cultural relic and obtaining the acoustic wave image according to the acoustic wave signal comprises: The ultrasonic transmitter emits sound waves to penetrate the immovable cultural relics, and the ultrasonic reflector captures the reflected signals to obtain sound wave signals; The acoustic wave signal is subjected to wavelet transformation and short-time Fourier transformation to obtain the time-frequency transformation result: ； In the formula, represents the time-frequency variation result, represents the time domain function, Indicates frequency; According to the time-frequency change results, the sound wave signal is converted into a time-frequency energy spectrum to obtain a sound wave image, and the sound wave image is compared with a preset sound wave image to compare the shape, frequency distribution, and energy distribution of the spectrum, and the sound wave health coefficient is calculated according to the preset weight ratio.

4. The method for monitoring the health of immovable cultural relics according to claim 1, characterized in that: Determining the health of the immovable cultural relics by using the state health coefficient, the image health coefficient and the sound wave health coefficient through fuzzy logic includes: The health of immovable cultural relics is defined as the output variable and divided into fuzzy sets; Formulate fuzzy rules to describe the impact of different input variables on output variables; Fuzzy reasoning is performed based on fuzzy rules to output the health of immovable cultural relics.

5. A terminal for implementing the method for monitoring the health of immovable cultural relics according to any one of claims 1 to 4, characterized in that: The terminal includes a conductivity sensor, a laser scanner, a gas sensor, a high-resolution camera, an ultrasonic transmitter, an ultrasonic reflector and a server.

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