WO2015074628A1 - Appareil et procédé de comparaison d'analyse - Google Patents

Appareil et procédé de comparaison d'analyse Download PDF

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Publication number
WO2015074628A1
WO2015074628A1 PCT/CN2014/092224 CN2014092224W WO2015074628A1 WO 2015074628 A1 WO2015074628 A1 WO 2015074628A1 CN 2014092224 W CN2014092224 W CN 2014092224W WO 2015074628 A1 WO2015074628 A1 WO 2015074628A1
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Prior art keywords
comparison
analysis
thermal image
image data
item
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PCT/CN2014/092224
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English (en)
Chinese (zh)
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王浩
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王浩
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Publication of WO2015074628A1 publication Critical patent/WO2015074628A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/20—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only
    • H04N23/23—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only from thermal infrared radiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077—Imaging

Definitions

  • the analysis and comparison device and the analysis and comparison method of the invention relate to the application field of infrared detection.
  • an analysis area is set for a specific portion of the thermal image of the subject, and analysis data is obtained in accordance with a predetermined analysis mode.
  • the analysis region is a combination of one or more analysis regions such as points, lines, and surfaces;
  • the analysis mode represents an analysis calculation rule used for analyzing and obtaining analysis data based on the thermal image data determined by the analysis region, and is not limited to the temperature value.
  • the calculation can be an analytical calculation rule involving various analyses related to thermal image data. For example, in the temperature analysis, calculate the highest temperature, the average temperature, the lowest temperature, and the difference between each other in the same analysis area, calculate the percentage content of all the pixels of the temperature in the analysis area, or may also include each analysis area. The calculation relationship between them is such as temperature difference.
  • the analysis and diagnosis of field devices is very inadequate, and the analysis of individual devices is often performed in isolation; there is a lack of effective means for analyzing and comparing horizontal and vertical comparisons of devices.
  • the horizontal contrast for example, during the specified time period, the comparison of the thermal image data of the same subject at different angles or the analysis data based on the thermal image data, the thermal image data of the same subject and/or based on the thermal image data Comparison of analytical data, etc.; longitudinal contrast, for example, comparison between thermal image data of subject history and/or analysis data based on the thermal image data.
  • the present invention provides an analysis and comparison device and an analysis and comparison method, which can achieve a rapid contrast effect on a thermal image of a device during live shooting, thereby solving the problems of the prior art.
  • the present invention uses the following technical solutions to analyze the comparison device, including:
  • a photographing unit for photographing and acquiring thermal image data
  • comparison item determining unit configured to determine a comparison item, wherein the comparison item is one-frame or multi-frame thermal image data, and/or analysis data obtained based on one-frame or multi-frame thermal image data;
  • the analysis comparison unit is configured to compare and analyze the obtained thermal image data and/or the analysis data obtained based on the acquired thermal image data with the comparison item to obtain an analysis comparison result.
  • the analytical comparison method of the present invention comprises the following steps:
  • comparison determining step of determining a comparison item the comparison item being one or more frames of thermal image data, and/or analysis data obtained based on one or more frames of thermal image data;
  • the analysis and comparison step is configured to compare and analyze the obtained thermal image data and/or the analysis data obtained based on the acquired thermal image data with the comparison item to obtain an analysis and comparison result.
  • Fig. 1 is a block diagram showing the electrical configuration of a thermal imaging device of the first embodiment.
  • Fig. 2 is an external view of the thermal image device of the first embodiment.
  • FIG. 3 is a schematic diagram showing the implementation of the subject information and the associated analysis region and analysis mode stored in the storage medium.
  • FIG. 4 is a display example of a display interface based on analysis and comparison results when photographing the subjects A, B, and C phases.
  • Fig. 5 is a control flow chart of the first embodiment.
  • FIG. 6 is a display example of another display interface for analyzing and comparing results when photographing the same group of subjects.
  • Fig. 7 is a control flow chart of the second embodiment.
  • FIG. 8 is a display example of a display interface displayed by a reference image
  • Fig. 9 is a block diagram showing the electrical configuration of the thermal imaging device of the third embodiment.
  • Fig. 10 is a perspective view showing the thermal image processing apparatus of the third embodiment.
  • Figure 11 is a control flow chart of the third embodiment.
  • Figure 12-13 shows the display interface with the part information selection function.
  • a portable thermal imaging device 13 with a thermal image capturing function is exemplified as an analysis comparison device.
  • a processing device that continuously receives thermal image data such as a personal computer, a personal digital processing device, or the like, as an example of an analysis and comparison device.
  • the thermal image data is, for example, data obtained based on an infrared detector output signal; in the first embodiment, the thermal image AD value data (AD value) obtained by AD conversion of the infrared detector output signal is taken as an example.
  • the thermal image data may be, for example, image data of an infrared thermal image after pseudo-color, and may be, for example, array data of temperature values, and may be, for example, an internal output of the infrared detector itself.
  • Embodiment 1 uses a portable thermal imaging device 13 with a photographing function as an example of an analytical contrast device.
  • the structure of the thermal imaging device 13 of the first embodiment will be described with reference to Fig. 1 .
  • the thermal imaging device 13 includes an imaging unit 1, an image processing unit 2, a display control unit 3, a display unit 4, a communication I/F 5, a temporary storage unit 6, a memory card I/F 7, a memory card 8, a flash memory 9, and an operation unit 10.
  • the control unit 11 controls the overall control of the thermal imaging device 13 by controlling the connection with the data bus 12 and the corresponding portion.
  • the imaging unit 1 is composed of an optical member (not shown), a lens driving member, an infrared detector, a signal preprocessing circuit, and the like.
  • the optical component consists of an infrared optical lens for focusing the received infrared radiation onto the infrared detector.
  • the lens driving section drives the lens according to a control signal of the control section 11 to perform focusing or zooming, or may be a manually adjusted optical component.
  • Infrared detectors such as infrared or non-refrigerated infrared focal plane detectors, convert infrared radiation through optical components into electrical signals.
  • the signal pre-processing circuit comprises a sampling circuit, an AD conversion circuit, a timing trigger circuit, etc., and the signal output from the infrared detector is sampled and processed in a predetermined period, and converted by the AD conversion circuit to obtain digital AD value data.
  • Thermal image data is, for example, 8-bit or 14-bit or 16-bit binary data.
  • Thermal image data is not limited to the inherent resolution of the infrared detector, but can be lower or higher than the resolution of the infrared detector.
  • the imaging unit 1 functions as an acquisition unit for acquiring thermal image data.
  • the image processing unit 2 performs predetermined processing on the thermal image data obtained by the imaging unit 1, and the processing of the image processing unit 2 is converted to be suitable for display, such as correction, interpolation, pseudo color, synthesis, compression, decompression, and the like. Record processing with equal data.
  • the processing of generating the infrared thermal image by the thermal image data such as the pseudo color processing, specifically, in one embodiment, determining the corresponding pseudo color plate range according to the range of the AD value of the thermal image data or the setting range of the AD value.
  • the specific color value corresponding to the AD value of the thermal image data in the pseudo color plate range is taken as the image data of the corresponding pixel position in the infrared thermal image.
  • the image processing unit 2 obtains the compressed thermal image data in accordance with a predetermined compression process, and the thermal image data is recorded on a recording medium such as the memory card 8.
  • the image processing unit 2 can be realized by a DSP or another microprocessor, a programmable FPGA, or the like, or can be integrated with the control unit 11.
  • the display control unit 3 executes the output of the video signal for display image data stored in the temporary storage unit 6 in accordance with the control by the control unit 11, and the video signal can be displayed on the display unit 4.
  • a liquid crystal display having a screen aspect ratio of 4:3 can be selected; preferably, in order to clearly display the infrared thermal image, the subject information, etc., a liquid crystal display having a screen aspect ratio of 16:9 can be selected.
  • the control portion 11 can also control the output of image data for display, for example, through an image output interface (for example, various wired or wireless image output interfaces, such as an AV port). , RJ45 port, etc.), output image data for display; display control unit controls display on the display unit, and includes display output.
  • the display control unit 3 may be a processor integrated with the image processing unit 2 or the control unit 10.
  • the communication I/F 5 is connected to an external device such as a personal computer, a server, a PDA (Personal Digital Assistant), another thermal imaging device, or a visible light imaging device, for example, in accordance with a communication specification such as USB, 1394, or network.
  • a personal computer such as a personal computer, a server, a PDA (Personal Digital Assistant), another thermal imaging device, or a visible light imaging device, for example, in accordance with a communication specification such as USB, 1394, or network.
  • a communication specification such as USB, 1394, or network.
  • the temporary storage unit 6 is a buffer memory that temporarily stores thermal image data output from the imaging unit 1 as a buffer memory for temporarily storing thermal image data output from the imaging unit 1, and functions as a work memory of the image processing unit 2 and the control unit 11, and temporarily stores the memory.
  • the memory card I/F 7 is an interface of the memory card 8, and a memory card 8 as a rewritable nonvolatile memory is connected to the memory card I/F 7, and is detachably attached to the main body of the thermal image device 13 In the card slot, data such as thermal image data is recorded under the control of the control unit 11.
  • the flash memory 9 stores programs for control and various data used in the control of each part.
  • the flash memory 9 stores programs for control and various data used in the control of each part.
  • the storage medium for storing the subject information in the embodiment may be a storage medium in the thermal imaging device 13, such as a flash memory 9, a nonvolatile storage medium such as the memory card 8, or a temporary storage unit 6 or the like.
  • the storage medium may be other storage medium wired or wirelessly connected to the thermal image device 13, such as another storage device that communicates with the communication unit 5 by wire or wirelessly, or another storage device in a photographing device, a computer, or the like. Or the storage medium of the network destination.
  • data such as subject information related to the subject is stored in advance in the thermal image device 13 or in a nonvolatile storage medium connected thereto, and in the embodiment, the flash memory 9 is used as the storage object information.
  • the subject information is information related to the subject, and may include information such as subject identification information related to the subject; the generated subject indication information should allow the user to recognize and understand the corresponding
  • the subject in the example of the power industry application, such as information representing the subject's specific attribute of the subject, such as the location, type, number, etc. of the subject; for example, information representing the location, type, number, etc. of the subject, in addition, Examples of the subject related to the subject, classification level (such as voltage level, importance level, etc.), model, manufacturer, performance and characteristics, history of past shooting or overhaul, date of manufacture, age of use, part information, location Various information such as information and shooting angle.
  • various information in the subject information is configured in the form of information classification; an exemplary list as shown in FIG.
  • each subject The information is composed of attribute information of a plurality of specified attributes, such as the subject information 300 "Substation 1 equipment area 1 equipment 1A phase” having the attribute information "Substation 1" corresponding to the substation attribute, and the attribute information "Device area 1 corresponding to the equipment area attribute” ”, the attribute information “device 1” corresponding to the device type attribute, and the attribute information “A phase” corresponding to the different attribute.
  • the subject information may be stored in other forms such as a single attribute information.
  • the subject information includes a representative object location (such as substation 1, equipment area 1), type (such as device 1, representing a transformer, Information such as the device type of one of the switches, and the like (such as A, B, and C phases); the object information may have various configurations depending on the application.
  • a representative object location such as substation 1, equipment area 1
  • type such as device 1, representing a transformer
  • Information such as the device type of one of the switches, and the like (such as A, B, and C phases)
  • the object information may have various configurations depending on the application.
  • the operation unit 10 is for the user to perform various operations, and the control unit 11 executes the corresponding program based on the operation signal of the operation unit 10.
  • the operation unit 10 will be described with reference to Fig. 2, and the buttons for the user operation are provided with the record key 1, the analysis key 2, and the like; and the touch screen 3 or the voice recognition unit (not shown) or the like may be used to implement the related operation.
  • the control unit 11 controls the overall operation of the thermal imaging device 13, and stores a program for control and various data used for control of each part in a storage medium such as the flash memory 9.
  • the control unit 11 is realized by, for example, a CPU, an MPU, an SOC, a programmable FPGA, or the like; the image processing unit 2 and the display control unit 3 may be integrated with the control unit 11.
  • the control unit 11 is used as a comparison item determining unit for determining a comparison item; the comparison item may be one or more frames of thermal image data, and/or corresponding analysis data obtained based on one or more frames of thermal image data;
  • the comparison item may be determined according to one or more of the association information of the comparison item and/or other attributes of the comparison item, including the range of the association information and/or the range of other attributes, as the determination condition of the comparison item;
  • the associated information such as one or more of associated subject information, associated imaging parameters, associated trigger information, associated analysis data, associated reference images, associated other entry information, and the like.
  • the associated subject information for example, one or more pieces of subject information; for example, substation 1, device area 1, device 1 in the subject information "Substation 1 equipment area 1 device 1A phase” , phase A.
  • the associated shooting parameters such as the shooting distance when shooting the thermal image data, the ambient temperature, the wind speed, the humidity, the shooting time, the orientation information, such as one or more pieces of information in the GPS information, etc.;
  • the associated trigger information such as trigger information or obtained information from other sensors or devices wired or wirelessly connected to the thermal image device 13, such as load, rotational speed, position information acquisition device, barcode reading device, sensing device sensing Information, information obtained based on a web server, etc.;
  • the associated analysis data for example, the analysis data obtained by analyzing the thermal image data, the diagnosis result obtained by diagnosing the analysis data according to a predetermined diagnosis rule, and the like;
  • the associated reference image for example, the associated reference image attached to the thermal image data; when the reference image of the same morphological feature, generally corresponds to the same type of subject, therefore, a comparison item can be obtained therefrom;
  • the comparison item is determined, for example, according to other attributes of the comparison item such as an additional mark status, a file format, a storage address stored in a file or a storage medium, and the like.
  • the comparison item may also be determined based on the user's selection of the comparison item.
  • the associated information creating unit is configured to create related information of the comparison item.
  • a recording unit configured to associate the comparison item with the related information.
  • control unit 11 is a subject information selection unit for selecting subject information; preferably, the comparison item is determined based on the predetermined comparison item condition based on the subject information associated with the comparison item.
  • the thermal image data and the currently taken thermal image data are determined according to the specified comparison item conditions.
  • comparison item setting unit for the user to set various conditions, parameters, and the like related to the comparison; for example, the user can perform various settings, such as analysis, through the setting interface displayed by the operation unit and the display unit.
  • Relevant analysis area, analysis mode, diagnostic rules, comparison items related to analysis comparison, comparison item conditions, comparative analysis mode, pair Ratio analysis area, comparison diagnosis rule, contrast weighting coefficient, etc. enable analysis comparison to include at least comparison between thermal image data and/or analysis data of the same type of subject, three-phase comparison, historical data comparison of the same subject, etc. More effective analysis and comparison processing.
  • the conditions of the comparison item such as the keyword related to the comparison item, the number of comparisons, the range of the comparison item, the comparison order, and the like.
  • control unit 11 functions as a recording unit for correlating the acquired thermal image data and/or the analysis data obtained by the thermal image data with information on the selected subject information. It is convenient as a comparison item of the thermal image data acquired later.
  • the user can set a comparison item based on the selected subject information and the condition of the comparison item; for example, when "Substation 1 Device Area 1 Device 1A Phase" is selected;
  • condition of the comparison item is "this subject"
  • it can be applied to the multi-angle automatic comparison when the subject is photographed; when shooting, the multi-angle thermal image data of the photographing can be separately recorded and/or marked, For comparison.
  • the photographing may be taken
  • the thermal image data obtained continuously and/or the analysis data obtained based on the thermal image data are compared with historical data comparison items during a predetermined time period; they may be continuous comparison or may be performed at regular intervals. Compared.
  • condition of the comparison item is the condition of the "like device” as the comparison item, it can be applied to the captured thermal image data and/or based on the heat when the selected subject information of "device 1" is selected at the time of shooting.
  • the analysis data obtained like the data is automatically compared with the comparison item stored in the storage medium with the object type "device 1";
  • the condition of the comparison item is "like device + same component"
  • it can be applied to the captured thermal image data and/or based on the selected subject information having "device 1 + component information" at the time of shooting.
  • the analysis data obtained by the thermal image data is automatically compared with the comparison item having the object type and the same component information "device 1 + component information";
  • condition of the comparison item is "three-phase contrast" as a condition of the comparison item, it may be applied to the photographed thermal image data and/or based on the selected subject information belonging to the same group of three phases at the time of photographing.
  • the analysis data obtained by the thermal image data is automatically compared with the other object information comparison items except for the difference; it can be applied to the usual three-phase comparison of the power industry, and has a very practical and effective effect.
  • the comparison condition may include one or more of the above.
  • the object information is associated with at least one of a reference image, an analysis region related to the analysis comparison, an analysis comparison rule related to the analysis comparison, a comparison item condition, and a comparison item.
  • the reference image as a display reference for the specification shooting, preferably, the reference image embodies a prescribed morphological feature of the subject.
  • the control unit 11 serves as a reference image display control unit for controlling a reference image for displaying a predetermined position parameter in the infrared thermal image.
  • analysis and comparison rules related to the analysis and comparison in order to compare the analysis data of the thermal image data obtained by the current shooting, such as the highest temperature, with the highest temperature of the comparison item, and obtain the analysis and comparison result as an example to perform the analysis and comparison rule. And analysis and comparison results are explained;
  • the analysis and comparison result may be a common display of the highest temperatures of the two, such as "22 degrees” and "20 degrees";
  • the analysis comparison rule includes at least a comparative analysis mode related to the comparison of the plurality of comparison items; for example, the difference between the two can be further displayed by 2 degrees;
  • the comparative analysis mode and the corresponding diagnostic basis or rule associated with the comparison of the plurality of comparison items can be further displayed as "the difference is greater than 1.5 degrees, which is a suspected defect";
  • the comparative analysis mode, the corresponding diagnosis basis or the rule related to the comparison of the plurality of comparison items and the diagnosis are performed; for example, the diagnosis result may be further or only displayed that the difference value is greater than 1.5 degrees, which is a suspected defect! It may further include information related to the diagnosis, the type of defect, the degree of defect, and the treatment advice related to the diagnosis.
  • the comparative analysis area and the comparative analysis mode related to the comparison of the plurality of comparison items; for example, analyzing and comparing the relevant analysis area and the analysis mode, and re-analysing the thermal image data and the thermal image data as the comparison item; the comparison
  • the analysis area and the comparative analysis mode can be different from the previous ones.
  • the comparative analysis is performed according to the highest temperature. When a suspected defect is found, the analysis area and the analysis mode are reset, and the comparative analysis is performed again.
  • the control unit 11 serves as an analysis and comparison unit for analyzing and comparing the acquired thermal image data and/or the analysis data obtained based on the acquired thermal image data with the comparison item to obtain an analysis comparison result. In this way, it can be used for real-time analysis and comparison in real-time shooting.
  • the comparison processing of the analysis comparison section includes, for example, a combination of one or more of the following, depending on the application:
  • the maximum analysis value of the multi-frame thermal image data is obtained based on the comparison of the highest temperatures in the respective analysis regions.
  • the analytical value of the temperature difference is compared with the diagnostic threshold to obtain the final analytical comparison result.
  • the calculation relationship between the analysis comparison result obtained by the above embodiment and other specified parameters may be calculated, and the obtained analysis comparison result.
  • the plurality of analysis comparison results obtained by the foregoing embodiment may be used to perform weighted analysis and comparison results
  • it may be an analysis comparison result obtained by weighting the analysis comparison result obtained by the above embodiment, and an analysis comparison result obtained by comparison with a prescribed value.
  • the control unit 11 serves as an analysis unit for obtaining analysis data relating to the acquired thermal image data and comparison items.
  • the acquired thermal image data and the thermal image data as a comparison item can be analyzed to obtain analysis data of the two.
  • the relevant analytical data for the comparison item is obtained by parsing the analytical data associated with the comparison item.
  • the control unit 11 serves as an analysis unit for analyzing the acquired thermal image data in accordance with a predetermined analysis region to obtain analysis data.
  • the acquisition unit can continuously capture and acquire thermal image data; and the analysis unit can perform continuous analysis on the acquired continuous thermal image data.
  • the analysis area can have one or more analysis areas.
  • Analysis area in an example, when the object information and its associated analysis area related information (analysis area composition data and/or analysis area position parameter) are previously stored in the flash memory 9, wherein the analysis area position parameter is analyzed
  • the area is located in the position parameter in the thermal image data, and the analysis area can be set based on the information on the analysis area associated with the selected subject information according to the selection of the subject information.
  • the infrared thermal image can be displayed by the user according to The analysis area is set; in an example, when the analysis area is set for the played back thermal image data, the analysis area can also be set based on the information about the analysis area associated with the thermal image data.
  • the analysis area and the analysis mode of the comparison item are set according to the analysis area and the analysis mode set by the currently acquired thermal image data, and then analyzed and analyzed and compared; in another example, the analysis area according to the comparison item And analysis mode to set the analysis area and analysis mode of the currently acquired thermal image data, and then analyze and analyze the comparison.
  • the entire frame of thermal image data can also be used as a special case of the analysis area.
  • the analysis mode related to the analysis such as the analysis mode associated with the analysis area, such as the analysis mode set by the user, such as the default analysis mode of the thermal image device 13, and the like.
  • the image processing unit 2 Based on the control of the control unit 11, the image processing unit 2 performs predetermined processing such as correction and interpolation on the thermal image data obtained by the imaging unit 1 based on the analysis region, and is located in the infrared thermal image based on the analysis region.
  • the position parameter in the range for example, extracts the thermal image data in the set analysis area, performs temperature conversion processing, obtains the temperature value corresponding to the thermal image data, and then analyzes and calculates the obtained temperature value according to the analysis mode. For example, if the maximum value is calculated, the largest temperature value among them is extracted as the analysis data of the analysis area.
  • the thermal image data is converted into a temperature value by a predetermined process, for example, according to the set radiation coefficient of the object, the ambient temperature, the humidity, the distance from the thermal image device 13, and the like, and the thermal image data (for example, the AD value) in the analysis region.
  • the conversion coefficient between the temperature and the temperature is obtained by specifying a conversion formula.
  • the maximum value of the AD value may be converted to the highest temperature value, and the method of analyzing the thermal image data to obtain the temperature analysis data is well known to those skilled in the art, and the specific embodiments are omitted. description.
  • the analysis data may be an analysis value corresponding to each of one or more analysis regions of the thermal image data of the same frame; for example, the analysis regions S01 and S02 in FIG. 4 are sequentially determined for each analysis region (eg,
  • the thermal image data in the analysis area may also be thermal image data of the thermal image data of the pixel in which the area is analyzed, and the temperature value is converted and analyzed to obtain the analysis values of the maximum temperature values S01MAX and S02MAX of each analysis area. Analytical data.
  • the analysis data may be an analysis value corresponding to each of the plurality of analysis regions of the thermal image data of the same frame, and the analysis of the obtained analysis value is calculated according to the mutual calculation relationship between some or all of the analysis regions. Data; for example, the calculation relationship S01MAX-S02MAX between the analysis areas S01, S02 in Fig. 4 to obtain analysis data of the analysis value.
  • the analysis data may be analysis data of the analysis value obtained by the calculation relationship between the analysis value obtained by the above embodiment and other prescribed parameters.
  • the analysis data may be a comparison relationship between the analysis value obtained by the above embodiment and a predetermined diagnosis value, and the comparison analysis is performed, and the analysis data obtained as the diagnosis result is obtained.
  • the obtained diagnosis result is “concern”
  • the diagnosis result can also be embodied by various forms such as code number
  • the diagnosis result “attention” can also be used as a form of analysis data.
  • comparing the diagnostic results with the specified values can increase the speed of the comparison process.
  • the analysis data may be analytical data obtained from multi-frame thermal image data.
  • the analysis data may be analysis data obtained based on one frame of thermal image data generated by the multi-frame thermal image data.
  • the analysis data is a combination of a plurality of the above cases.
  • the above exemplification is not limited to the embodiment of the analysis process, and there may be various embodiments.
  • the above embodiment illustrates the embodiment of the temperature analysis data, but is not limited thereto, and the thermal image analysis is not necessarily different depending on the application. It is converted into a temperature value, for example, it can be converted into a radiant energy value, a gradation value, an illuminance value, and the like for analysis. The invention is equally applicable to these situations.
  • the manner in which the thermal image data is analyzed to obtain analytical data is well known to those skilled in the art, and a detailed description of other embodiments is omitted.
  • a rendering portion for presenting analytical comparison results There may be various forms; the presentation status of the prompt identification and/or analysis area and/or analysis data may be determined based on the analysis comparison results.
  • the prompt identifier therein for example, an arrow indicating the identifier obtained according to the analysis area, is used to prompt the analysis part; the presentation state, for example, the existing analysis area of the body and/or the display of the marker and/or the analysis data, the display position, and the shape At least one of parameters such as color, transparency, flicker, and size. It may also be presented in other ways, such as displaying a thumbnail of the infrared thermal image of the contrast item, displaying a characteristic curve obtained by analyzing the data, and the like.
  • the analysis and comparison device including,
  • a photographing unit for continuously capturing thermal image data
  • comparison item determining unit configured to determine a comparison item, wherein the comparison item is multi-frame thermal image data, and/or analysis data obtained by each of the multi-frame thermal image data;
  • the analysis and comparison section is used for analyzing and comparing the comparison items to obtain analysis and comparison results.
  • Embodiment 1 captures, for example, a subject of a substation.
  • the control unit 11 initializes the internal circuit, and then enters the imaging mode, that is, the imaging unit 1 captures and obtains thermal image data, and the image processing unit 2 performs predetermined processing on the thermal image data captured by the imaging unit 1 and stores it.
  • the control unit 11 performs control of the display unit 3, and causes the display unit 4 to continuously display the infrared thermal image as a moving image.
  • Embodiment 1 will be described with reference to the flowchart of FIG. 4 is a display example of a display interface according to an analysis comparison result when photographing a subject A, B, and C phases. It is assumed that the user sets the comparison of the three phases of the A, B, and C of the subject in advance; and sets the diagnosis basis based on the comparison data: the temperature difference of the same part area is greater than 1.5 degrees, indicating that the large suspect is defective, to obtain Analyze the comparison results.
  • Step A01 capturing and acquiring thermal image data, transferring the thermal image data obtained by the imaging unit 1 to the temporary storage unit 6;
  • step A02 the display control unit controls the display unit 4 to display the infrared thermal image generated by the acquired thermal image data and the subject indication information obtained by the predetermined number of subject information.
  • the image processing unit 2 controls the image data obtained by capturing the obtained thermal image data to generate image data of the infrared thermal image, and the object information based on the object stored in the flash memory 9 as shown in FIG.
  • the predetermined number of subject information generates image data of the subject instruction information, and is synthesized; the synthesized image data is stored in the temporary storage unit 6; and then the combined image data is controlled to be displayed on the display unit 4.
  • the predetermined amount of subject information is newly determined based on the adjustment amount and the scroll direction.
  • the control unit 11 determines whether the user performs an adjustment operation, for example, whether or not the scroll bar as shown in FIG. 4 has been dragged, and the display adjustment of the subject instruction information is performed, or the user performs the operation through the operation unit.
  • the page turning adjustment operation if any, determines the adjusted predetermined number of subject information based on the adjustment amount of the scroll bar by the user, and then displays the corresponding subject instruction information.
  • the display control unit hierarchically displays the predetermined information for generating the subject instruction information in the subject information in accordance with the predetermined position. For example, attribute information of the subject information based on attribute information of the subject information stored in the storage medium The information is displayed according to the hierarchy of the assigned hierarchical structure and the attribute information corresponding to each level. For example, the object information is divided into three layers according to the attribute information representing the substation, the equipment area, the device type, and the specified attribute of the phase, according to the specified position; compared with the subject indication information in the display interface in FIG. The number of words in the same row is reduced, and the user can easily observe and select.
  • the subject instruction information obtained based on the subject information may be obtained by all or part of the subject information, and the information for obtaining the subject indication information in the subject information may be defined in advance. Composition.
  • step A03 it is judged whether or not the subject information is selected. If no, go to step A08;
  • the control unit 11 selects the subject information corresponding to the subject indication information in response to the user's selection operation; as shown in FIG. 4(A) , selected "Substation 1 equipment area 1 equipment 1A phase".
  • the control unit 11 associates the captured thermal image data with the selected subject information;
  • the subject information is selected.
  • the default method can also be selected, for example, selecting the last selected subject information at the last power-on.
  • the analysis areas S01, S02 and related analysis modes and the like may be preset by the user or defaulted by the thermal image device 13; preferably, according to the object information "Substation 1 device area 1 device 1A phase” association
  • the analysis area constitutes the data and the positional parameter of the analysis area, and is set; further, preferably, according to the subject information "Substation 1 equipment area 1 device 1A phase” associated with the reference image embodying the subject morphological feature, Analysis area.
  • Step A04 judging whether there is a contrast comparison item?
  • step A06 when shooting the subject "Substation 1 equipment area 1 equipment 1A phase", since there is no relevant comparison item in the storage medium, as shown in Fig. 4(A), "None "Comparative item”; the user can press the record key in step A06, and in step A07, the thermal image data obtained by capturing the subject "substation 1 device area 1 device 1A phase” and/or obtained based on the thermal image data
  • the analysis data is recorded in association with the subject information, for example, in the temporary storage unit 6 or the memory card 8; obviously, the step A06 may be omitted, or the control unit 11 may identify the subject based on predetermined conditions such as thermal image data and subject.
  • the thermal image data is also automatically recorded in association with the selected subject information.
  • step A08 if it is not exited, it returns to step A01; when in step A03, the subject information is reselected, for example, the subject information "substation 1 device area 1 device 1B phase" is selected; The thermal image data obtained by the "substation 1 device area 1 device 1A phase” and/or the analysis data obtained based on the thermal image data are stored, and the keywords other than the matching match, and thus can be used as comparison items; then step A04 If yes, go to step A05;
  • the thermal image data obtained by the new shooting may be compared with the previously stored comparison item, for example, for "Substation 1 equipment area 1 equipment 1A phase "Analysis of comparisons when shooting at multiple angles.”
  • Step A05 taking thermal image data obtained by "Substation 1 device area 1 device 1A phase” and/or analysis data obtained based on the thermal image data, and obtaining thermal image data obtained by current shooting and/or obtaining based on the thermal image data Analyze the data, compare and obtain the analysis and comparison results;
  • the subject information "Substation 1 Device Area 1 Device 1B Phase" can be pressed and associated with the captured thermal image data and/or analysis data obtained based on the thermal image data. .
  • step A04 is YES, and, in step A05, the analysis comparison result between the three phases A, B, and C is obtained; as shown in FIG. 4(C), since the B phase S02 portion is more than the A phase, the C phase S02 The position is 2 degrees higher, and the A phase S01 portion is 2 degrees higher than the C phase S01 portion; the words "A phase S01 portion and B phase S02 portion have suspected defects! are displayed.
  • the analysis processing of the single-frame thermal image data may be based on the analysis region of the position parameter (including the analysis regions S01 and S02), and the analysis region is set according to the highest temperature in the predetermined analysis modes S01 and S02.
  • the thermal image data is analyzed to obtain the analysis data of S01MAX and S02MAX.
  • each frame of thermal image data obtained by the shooting can be analyzed; in another example, the imaging position state of the subject thermal image as shown in FIG. 4 (the analysis area is located) The desired state of the thermal image of the subject), pressing the button representing the analysis indication, and performing analysis processing to ensure the correctness of the analysis data.
  • the infrared thermal image may be frozen, and the thermal image data held in the temporary storage unit 6 by the frozen infrared thermal image is subjected to analysis area setting and subsequent analysis; obviously, when freezing or unfreezing
  • the thermal image data is associated with the selected subject information record.
  • the analysis of each thermal image data is performed at the time of analysis and comparison, and the analysis comparison result is thereby obtained.
  • an analysis comparison rule related to obtaining the comparison result of the analysis may be displayed, and the analysis comparison rule may include an area for analyzing and comparing, an analysis mode for analyzing and comparing, a diagnosis basis for analyzing and comparing, a diagnosis result, and preferably a diagnosis of the defect portion.
  • the diagnosis result for example, the diagnosis conclusion, further includes a diagnosis threshold related to the diagnosis, a diagnosis basis, a defect type, a defect degree, a treatment suggestion, etc., and the related information may be pre-associated with the object information and the like, and may be written. Notify in a way that the user can perceive.
  • the subject information and its associated analysis region, analysis mode, and analysis comparison rule are stored in association.
  • control unit 11 may be a presentation unit, for example, by display changes such as characters or images in the display unit or the like, and conversion of the analysis areas S01 and S02 such as color, blinking light, and light generated by the indicator light. , voice prompts, vibrations, etc., as long as the user can be aware of the methods are included.
  • step A08 the control unit 11 detects whether or not to exit. If no, the process returns to step A01, and the user can select the subject information for shooting.
  • the thermal image data obtained by the real-time shooting is analyzed and compared according to the comparison item to obtain an analysis comparison result, thereby being conveniently observed by the user.
  • the user can promptly notice the analysis area or analysis part that should be observed, the user's shooting speed is improved, and the shooting effect is better.
  • Embodiment 1 is a preferred embodiment, and of course, it is not necessarily required to achieve all of the advantages described above while implementing any of the embodiments of the present invention.
  • the second embodiment is a thermal imaging device 13 having the same configuration as that of the first embodiment, and differs from the first embodiment in that it does not have the function of selecting the subject information. However, if there is a button for setting a comparison item and a button for canceling the comparison item, when the button for setting the comparison item is pressed, the thermal image data is stored as a subsequent comparison item; when canceled, all the comparison items are canceled or canceled in turn; Fig. 7 is a view showing the control flow of the second embodiment, and the display interface of the second embodiment will be described with reference to Fig. 6 .
  • Step B01 capturing and acquiring thermal image data, transferring the thermal image data obtained by the imaging unit 1 to the temporary storage unit 6;
  • Step B02 judging whether there is a contrast comparison item?
  • step B04 when photographing the subject "substation 1 device area 1 device 1A phase", since there is no thermal image data as a comparison item and analysis data obtained based on the thermal image data, 6(A), "No Comparison Item” can be displayed; the user can press the record button at step B04, and at step B05, the thermal image obtained by the subject "Substation 1 Device Area 1 Device 1A Phase" will be taken.
  • Data and/or analysis data records obtained based on the thermal image data for example, stored in the temporary storage unit 6 or the memory card 8; obviously, the step B04 may be omitted, or the control unit 11 may be based on predetermined conditions such as thermal image data and The matching degree of the subject identification information (such as the subject template), the temperature value in the thermal image exceeds a predetermined threshold, for example, when a trigger signal of another sensor device connected to the thermal image device 13 is detected, a prescribed time, etc., even if there is no
  • the recording operation also automatically records the thermal image data in association with the selected subject information.
  • the recorded thermal image data or the like is, for example, a mark of "Comparative Item 1" attached.
  • step B06 if it is not exited, it returns to step B01; when the subject "substation 1 equipment area 1 device 1B phase" is photographed; since the storage medium stores the subject "substation 1 equipment area 1 device” 1A phase” obtained thermal image data and / or analysis data obtained based on the thermal image data; then step B02 is yes, then to step B03;
  • Step B03 the thermal image data obtained by taking the "Substation 1 device area 1 device 1A phase" and/or the analysis data obtained based on the thermal image data, and the thermal image data obtained by the current shooting and/or based on the thermal image data are obtained. Analyze the data, compare and obtain the analysis and comparison results;
  • the recording key may be pressed to record the thermal image data obtained by capturing the subject "Substation 1 device area 1 device 1B phase” and/or the analysis data obtained based on the thermal image data.
  • the recorded thermal image data or the like is, for example, a mark of "Comparative Item 2" attached.
  • step B02 is YES, and, in step B03, the analysis comparison result between the three phases A, B, and C can be obtained;
  • the S02 portion of the B phase is 2 degrees higher than the S02 portion of the A phase and the C phase, and the S01 portion of the A phase is 2 degrees higher than the S01 portion of the C phase;
  • S01 of the comparison item 1 and the comparison item 2 are displayed.
  • the word S02 has a suspected defect!"
  • step B06 the control unit 11 detects whether or not to exit. If no, the process returns to step B01, and the user can select the angle of the subject to perform photography. Also, when you need to take another subject, press the Cancel button to cancel the previously stored comparison.
  • the thermal image data obtained by the real-time shooting is analyzed and compared according to the comparison item to obtain an analysis comparison result, thereby being conveniently observed by the user.
  • the user can promptly notice the analysis area or analysis part that should be observed, the user's shooting speed is improved, and the shooting effect is better. As a result, ordinary users can achieve a good level of shooting skills.
  • the reference image is displayed in the infrared thermal image to perform auxiliary shooting to improve the quality of the thermal image data, and the subsequent comparison is more effective; the reference image is used in the shooting.
  • Reference is made to align the photographing of the subject, such as a crosshair or the like;
  • the preferred reference image embodies the morphological features of the subject, such as the reference image T1 shown in FIG. 8, apparently the subject thermal image IR1 is based on the reference image T1 is used for shooting, and the image quality is higher;
  • the reference image composition data is used to obtain a reference image, which may be vector graphics data, or dot matrix data, or both vector graphics data and dot matrix data.
  • the constituent data of the subject information and its associated reference image are stored in the storage medium; further, the configuration data of the reference image and the positional parameter of the reference image in the infrared thermal image are stored; further preferably, the reference is also stored.
  • An analysis area corresponding to the image (including composition data of the analysis area and a relative positional relationship between the analysis area and the reference image, such as a position parameter (position, or also including a size, or a rotation angle) of the analysis area in the reference image )), analysis mode corresponding to the analysis area.
  • Another preferred method is to obtain a reference image in the infrared thermal image generated by the currently photographed thermal image data according to the constituent data of the reference image associated with the comparison item and the positional parameter of the reference image located in the infrared thermal image to maintain and contrast.
  • the above embodiment can be applied to the thermal image device 13 for taking an infrared picture, and is also applicable to the thermal imaging device 13 using a dynamic recording method.
  • the first and second embodiments described above are not limited to the thermal imaging device 13 with a photographing function, and may be applied to a thermal image processing device (such as a computer, a personal digital assistant, a display device used in conjunction with a thermal imaging device of a photographing function, etc.).
  • a thermal image processing device such as a computer, a personal digital assistant, a display device used in conjunction with a thermal imaging device of a photographing function, etc.
  • For analysis and comparison processing of received thermal image data for example, continuously received.
  • analyzing the contrast device including,
  • comparison item determining unit configured to determine a comparison item, wherein the comparison item is one-frame or multi-frame thermal image data, and/or analysis data obtained based on one-frame or multi-frame thermal image data;
  • the analysis comparison unit is configured to compare and analyze the obtained thermal image data and/or the analysis data obtained based on the acquired thermal image data with the comparison item to obtain an analysis comparison result.
  • thermal image device 13 with a photographing function It is not limited to the thermal image device 13 with a photographing function, but can also be applied to a thermal image processing device (such as a computer, a personal digital assistant, a display device used in conjunction with a thermal image device of a photographing function, etc.) for use in a thermal image file or the like. Processing.
  • a thermal image processing device such as a computer, a personal digital assistant, a display device used in conjunction with a thermal image device of a photographing function, etc.
  • Fig. 11 is a block diagram showing the electrical configuration of the thermal image processing apparatus 1.
  • the thermal image processing apparatus 1 includes a CPU 2 that performs overall control, a RAM 3 that is connected to the CPU 2 via a bus, a display unit 4, a hard disk 5, an auxiliary storage unit 6, an operation unit 7, and a communication unit 8.
  • the thermal image processing apparatus 1 may be a computer, a PDA, a dedicated display processing apparatus, or the like.
  • the RAM 3 temporarily stores various data temporarily generated by the CPU 2 executing the program.
  • the display unit 4 such as a liquid crystal display, performs display based on the control of the CPU 2.
  • the display unit 4 may be another display connected to the image processing device 1 , and the display device 1 itself may have no display in its electrical configuration.
  • the hard disk 5 stores programs for control and various data used in the control.
  • the auxiliary storage unit 6 for example, a storage medium such as a CD-ROM or a memory card, and an associated interface.
  • the operation unit 7 is for the user to give an instruction to the thermal image processing apparatus 1 or input setting information, and the CPU 8 executes the corresponding program based on the operation signal of the operation unit 7.
  • the operation unit 7 is configured by, for example, a keyboard, a mouse, or the like, and is not limited thereto.
  • the operation can be realized by using a touch panel or a voice control unit.
  • the communication unit 8 is a communication device that connects the thermal image processing device 1 to an external device in accordance with a communication specification such as USB, 1394, or network.
  • the CPU 2 controls the overall operation of the thermal image processing apparatus 1, and the control program stored in the hard disk 5 causes the CPU 2 to execute the corresponding processing.
  • the CPU 2 is used as an acquisition unit for acquiring thermal image data.
  • the CPU 2 is used as a comparison item determining unit for determining a comparison item, the comparison item being one or more frames of thermal image data, and/or analysis data obtained based on one or more frames of thermal image data;
  • the CPU 2 is used as an analysis comparison unit for analyzing and comparing the acquired thermal image data and/or the analysis data obtained based on the acquired thermal image data with the comparison item to obtain an analysis comparison result.
  • the analyzing and comparing device includes: an acquiring unit, configured to acquire multi-frame thermal image data;
  • comparison item determining unit configured to determine a comparison item, wherein the comparison item is based on the multi-frame thermal image data, and/or analysis data obtained based on the multi-frame thermal image data;
  • the analysis and comparison section is used for analyzing and comparing the comparison items to obtain analysis and comparison results.
  • the CPU 2 After the thermal image analysis and contrast device 1 is activated, the CPU 2 performs its control to display a corresponding processing interface, and the user can determine the number of pending processing by, for example, selecting a plurality of thermal image files stored in the auxiliary storage unit 6 or the hard disk 5.
  • Frame thermal image data; infrared thermal image obtained without thermal image data may be displayed.
  • the thermal image data selected from the communication unit 8 and connected to the external device may be connected to an external storage device or a thermal image capturing device to obtain thermal image data to be processed.
  • a predetermined amount of thermal image data is automatically selected from the storage medium, for example, the thermal image file in the memory card in the auxiliary storage portion is automatically selected.
  • the user sets the three-phase contrast maximum temperature as a comparison condition to obtain the analysis and comparison result; and has a finishing unit that sorts and stores the same group of thermal image data with a temperature difference greater than 2 degrees into a prescribed folder.
  • step C01 the thermal image data is acquired; the user can select one or more thermal image files.
  • Step C02 judging whether there is a contrast comparison item?
  • the comparison of the associated information may be sequentially performed on the plurality of thermal image files to determine the same group of three-phase thermal image data that are compared with each other;
  • step C04 the user may re-determine the comparison item; or name the thermal image data to add object information including the same information;
  • step C03 performs a comparative analysis in step C03 to obtain an analysis comparison result; and then, the same group of thermal image data with a temperature difference greater than 2 degrees may be sorted and stored into a prescribed folder; for subsequent further analysis; or may also display relevant Information such as three-phase infrared images, respective analysis data, analysis and comparison data, etc., wait for the user to confirm, and sorting is performed after confirmation.
  • Step C05 detecting whether to exit? If no, return to step C02.
  • thermal imaging devices with shooting functions which can be used as an analysis and collation during playback.
  • the numbers of the analysis areas S01 and S02 described above are not necessarily required for the description of the embodiments; in one example, the numbers may not be numbered, and the set analysis area may be analyzed according to the selected analysis mode.
  • the numbers of the analysis areas S01, S02 may be replaced by or with corresponding part information such as "joint”, “upper casing”, “lower casing”.
  • the part information may be information of a part, a photographing part, an angle, and the like; in an example, the part information may be a part of a subject The information such as the connector, the sleeve, the base, and the like; in another example, the part information may be the photographing part information of the subject as above, the middle, the bottom, etc., or the further part information may also be the part information and the photographing part or angle
  • the combined information such as the upper part of the casing, the lower part of the casing, etc., and the part information may also be a subdivision of the type of the part, for example, the joint may be divided into a T-clamp, a crimping pipe, a grooved wire clamp, etc.;
  • the parts can be prepared in advance for various parts of the information, which is convenient for the user to select.
  • the user can set the analysis area according to the analysis area associated with the part information, and set the analysis area by selecting the part information, and display the part information in the infrared thermal image corresponding to the analysis area, which is more convenient for the user to view.
  • the display part information and the corresponding analysis data such as "the upper part of the sleeve TS: 25", are very intuitive;
  • the subject information may be associated with the part information, and the part information associated with the selected subject information may be displayed for the user to select and set the analysis area; the display interface is as shown in FIG.
  • thermal image device and the thermal image processing device are described as an example of the analysis and comparison device; obviously, it can also be used as a component or a functional module in a thermal image device with a photographing function or a thermal image processing device.
  • An embodiment of the present invention is constructed.
  • the description is in a certain order of steps, but there may be various orders according to different embodiments, and is not limited to the processing order described in the above examples.
  • the control unit 11, the image processing unit 2, and the like are divided into a plurality of processors, there may be parallel processing to which some steps are applied.
  • a computer (or a device such as a CPU, an MPU, etc.) of a system or device that can perform the functions of the above-described embodiments by a program recorded on a storage device alone, and a computer by the system or device by the steps thereof This is achieved by, for example, reading and executing a program recorded on a storage device to perform the functions of the above-described embodiments and knowingly.
  • the program is provided to the computer, for example, via a network or from various types of recording media (eg, computer readable media) used as storage devices.
  • the present invention provides a computer program in which digital signals are recorded in a computer readable recording medium such as a hard disk, a memory or the like. After the program runs, perform the following steps:
  • comparison determining step of determining a comparison item the comparison item being one or more frames of thermal image data, and/or analysis data obtained based on one or more frames of thermal image data;
  • the analysis and comparison step is configured to compare and analyze the obtained thermal image data and/or the analysis data obtained based on the acquired thermal image data with the comparison item to obtain an analysis and comparison result.
  • An example of the present invention also provides a readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer in the thermal image device to perform the following steps:
  • comparison determining step of determining a comparison item the comparison item being multi-frame thermal image data obtained based on the specified frame, and/or analysis data obtained based on multi-frame thermal image data;
  • the analysis and comparison steps are used to analyze and compare the comparison items to obtain the analysis and comparison results.
  • the application of the object in the power industry is exemplified as a scene, and is also widely used in various industries of infrared detection.
  • the above description is only specific examples (embodiments) of the invention, and various exemplary embodiments are not intended to limit the scope of the invention, and various embodiments may be substituted and combined to form further embodiments. Other modifications and changes may be made to the specific embodiments without departing from the spirit and scope of the invention.

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Abstract

L'invention concerne un appareil de comparaison d'analyse qui comporte : une partie de tournage (1), utilisée pour capturer et acquérir des données d'images thermiques; une partie de détermination de sujet de comparaison, utilisée pour déterminer le sujet de comparaison; une partie de comparaison d'analyse, utilisée pour mettre en œuvre une comparaison d'analyse du sujet de comparaison avec les données d'images thermiques acquises et/ou des données d'analyse obtenues des données d'images thermiques acquises, obtenant ainsi des résultats de comparaison d'analyse. Le sujet de comparaison est l'une ou une pluralité de données d'images thermiques et/ou de données d'analyse obtenues de la ou des données d'images thermiques. L'appareil de comparaison d'analyse peut obtenir une comparaison rapide d'images thermiques sur un dispositif pendant une tournage en direct, résolvant ainsi le problème de l'état antérieur de la technique selon lequel l'analyse et le diagnostic de dispositif en direct étaient insuffisants. L'invention concerne également un procédé de comparaison d'analyse.
PCT/CN2014/092224 2013-11-25 2014-11-25 Appareil et procédé de comparaison d'analyse WO2015074628A1 (fr)

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