CN114485954A - Cable accessory temperature data abnormity judgment method and system - Google Patents
Cable accessory temperature data abnormity judgment method and system Download PDFInfo
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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Abstract
The utility model belongs to the technical field of cable and cable accessory temperature monitoring, and provides a cable accessory temperature data abnormity judgment method, which comprises the following steps: step 1: acquiring a surface temperature image and an environment temperature image of the cable accessory; step 2: analyzing and processing the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature; and step 3: analyzing and processing the surface temperature image of the cable accessory in a set time period to obtain the rising rate of the surface temperature of the cable accessory in the set time period; and 4, step 4: when the difference value between the surface temperature of the cable accessory and the environment temperature is larger than zero and the speed of the surface temperature height of the cable accessory is larger than a threshold value in a set time period, carrying out temperature alarm; this openly gathers cable accessories's surface temperature and ambient temperature through non-contact infrared array temperature monitoring sensor, has avoided the manual contact, and has improved the accuracy of monitoring result.
Description
Technical Field
The disclosure relates to the technical field of cable and cable accessory temperature monitoring, in particular to a cable accessory temperature data abnormity judgment method and system.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
Because the cable joint is formed by connecting the cables into a whole by manpower, multiple problems of insulation, sealing, aging and the like exist. The terminal of the cable is generally located in a transformer substation and a switching station, so that the environment is good, and observation and monitoring are convenient. The weakest part of the cable becomes the intermediate joint of the cable, and the bluish intermediate joint is in the middle part of the cable, and the environment is not easy to monitor, possibly in a calandria or a cable tunnel. In addition, in order to ensure the tightness, insulation and stability of the cable intermediate joint, the cable intermediate joint is often tightly wrapped, and even if problems occur, the problems are difficult to find.
According to research, the intermediate joints of the cables are connected by manual work, impurities enter the joints due to long time or imperfect sealing measures, and flashover is caused. As the flashover phenomenon progresses, temperature rise occurs to carbonize the insulating surface, thereby causing damage to the joint. The carbonization process is slowly and rapidly carried out, so that effective monitoring measures are taken for the cable intermediate joint, and cable accidents can be avoided.
And current monitoring to cable joint is mostly manual monitoring, and manual monitoring needs closely contact cable, has certain danger, and manual monitoring's means is limited, has certain error to the monitoring of cable temperature.
Disclosure of Invention
The present disclosure is directed to provide a method for determining an abnormality of temperature data of a cable accessory, so as to solve the risk and inaccuracy of the conventional cable joint temperature monitoring in the above-mentioned background art.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
in a first aspect, the present disclosure provides a method for determining an abnormality of temperature data of a cable accessory, including the following steps:
step 1: acquiring a surface temperature image and an environment temperature image of the cable accessory;
step 2: analyzing and processing the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature;
and step 3: analyzing and processing the surface temperature image of the cable accessory in a set time period to obtain the rising rate of the surface temperature of the cable accessory in the set time period;
and 4, step 4: and when the difference value between the surface temperature of the cable accessory and the ambient temperature is greater than zero and the speed of the surface temperature height of the cable accessory is greater than a threshold value in a set time period, performing temperature alarm.
Further technical limitation, the collecting of the temperature data of the cable accessory specifically includes:
selecting cable accessories in a region to be detected;
and acquiring a surface temperature image and an environment temperature image of the cable accessory by using the non-contact infrared array temperature monitoring sensor.
A further technical definition is to image a surface temperature image of the cable accessory:
displaying a surface temperature image of the cable accessory at a certain moment;
the maximum, minimum and average values of the surface temperature data of the cable accessory are displayed.
Further technical definition, the method further comprises the following steps:
collecting the load current change of the cable accessory;
and dynamically adjusting the temperature acquisition frequency in combination with the rate of the surface temperature rise of the cable accessory in a set time period.
Further technical definition, the method further comprises the following steps:
comprehensively analyzing the surface temperature, the environment temperature and the load current data of the cable accessory;
and obtaining the current running condition of the cable.
Further technically limited, the working temperature range of the non-contact infrared array temperature monitoring sensor is as follows: -40 ℃ to 85 ℃.
Further technically, the monitoring temperature range of the non-contact infrared array temperature monitoring sensor is as follows: -40 ℃ to 300 ℃.
In a second aspect, the present disclosure provides a system for determining abnormality of temperature data of a cable accessory, including:
a temperature acquisition module configured to acquire a surface temperature image and an ambient temperature image of the cable accessory;
the temperature calculation module is configured to analyze and process the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature;
the temperature rise rate calculation module is configured to analyze and process the surface temperature image of the cable accessory in a set time period to obtain the rate of the surface temperature rise of the cable accessory in the set time period;
and the temperature alarm module is configured to alarm the temperature when the difference value between the surface temperature of the cable accessory and the ambient temperature is greater than zero and the height rate of the surface temperature of the cable accessory is greater than a threshold value in a set time period.
In a third aspect, the present invention also provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform the method of the first aspect.
In a fourth aspect, the present invention also provides a computer device, comprising:
one or more processors, one or more memories, and one or more computer programs; wherein a processor is connected to the memory, the one or more computer programs being stored in the memory, and the processor executes the one or more computer programs stored in the memory when the electronic device is running, so as to make the electronic device execute the instructions for performing the method according to the first aspect.
Compared with the prior art, the beneficial effect of this disclosure is:
the method adopts the non-contact infrared array temperature monitoring sensor to acquire the surface temperature and the environment temperature of the cable accessory, obtains the rising rate of the surface temperature of the cable accessory in a set time period, compares the rising rate of the surface temperature of the cable accessory in the set time period with a threshold value, alarms in time and ensures the accuracy of data acquisition; meanwhile, manual contact is avoided, and the safety of monitoring the cable accessories is improved.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a flowchart of a method according to a first embodiment of the disclosure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, in order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the words "first", "second", etc. do not necessarily define a quantity or order of execution and that the words "first", "second", etc. do not necessarily differ.
For the purpose of promoting an understanding of the present disclosure, the present disclosure is further explained in the following detailed description with reference to the drawings, which are not to be construed as limiting the embodiments of the present disclosure.
Example one
The embodiment provides a cable accessory temperature data abnormity judgment method, which comprises the following steps of;
step 1: acquiring a surface temperature image and an environment temperature image of the cable accessory;
step 2: analyzing and processing the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature;
and step 3: analyzing and processing the surface temperature image of the cable accessory in a set time period to obtain the rising rate of the surface temperature of the cable accessory in the set time period;
and 4, step 4: and when the difference value between the surface temperature of the cable accessory and the ambient temperature is greater than zero and the speed of the surface temperature height of the cable accessory is greater than a threshold value in a set time period, performing temperature alarm.
In a specific embodiment, the collecting the temperature data of the cable accessory specifically comprises:
selecting cable accessories in a region to be detected;
acquiring a surface temperature image and an environment temperature image of the cable accessory by using a non-contact infrared array temperature monitoring sensor;
non-contact infrared array (32 x 24) temperature monitoring sensor, the operating temperature range is: -40 ℃ to 85 ℃, measurable object temperature range is: -40 ℃ to 300 ℃. The infrared sensor maintains a high level of accuracy throughout the measurement range, providing a typical target object temperature accuracy of ± 1 ℃. The sensor may provide very good performance for applications that do not require high resolution images or high frame rates, and also provide a cost-effective alternative to more expensive high-end thermal imagers.
Specifically, the surface temperature image for the cable accessory is imaged:
displaying a surface temperature image of the cable accessory at a certain moment;
the highest, lowest and average values of the surface temperature data of the cable accessory are displayed.
Specifically, the method further comprises:
collecting the load current change of the cable accessory;
and dynamically adjusting the temperature acquisition frequency in combination with the rate of the surface temperature rise of the cable accessory in a set time period.
Specifically, the method further comprises:
comprehensively analyzing the surface temperature, the environment temperature and the load current data of the cable accessory;
and obtaining the current running condition of the cable, wherein the running condition of the cable can be divided into normal running, general defects, major defects and emergency defects.
It can be understood that the classification of the operating conditions may specifically set the classification threshold of the operating conditions according to the actual specification of the cable, that is, the temperature tolerance, and will not be described herein again.
In the specific embodiment, the non-contact infrared array based temperature monitoring sensor comprises a temperature data two-dimensional coding imaging method, a temperature data three-dimensional space-time imaging method, a temperature data temperature rise method and a measuring method of a peripheral numerical value temperature difference method;
according to the objective basis, a heat source temperature distribution image formed by infrared rays emitted by a heat source can be used for detecting the state of the power cable under the fault by adopting an infrared array temperature measurement means. The temperature of all pixel points is measured through the infrared array, the temperature data is read back, the height is represented in different colors or modes, and the fitting of the temperature is realized by utilizing a Gaussian function.
The temperature data three-dimensional space-time imaging method and the display function of the temperature numerical value three-dimensional graph can display each local temperature at a certain moment in a curve (two-dimensional) or curved surface (three-dimensional) mode. Thereby, historical temperature records of single or multiple temperature measuring points can be inquired and displayed in a plane or three-dimensional mode. Some statistical results, such as the highest temperature, the lowest temperature, the average temperature, etc., can be displayed in the chart in real time.
The temperature data temperature rise method is characterized in that the material, the size and the temperature of a measured object are different, and the requirement for non-contact measurement is correspondingly improved, so that the temperature rise is measured in a non-contact manner based on the infrared temperature measurement principle. The temperature rise method is a method in which a current thermal effect is generated after a conductor passes through, and the temperature of the surface of the conductor continuously rises until the conductor is stabilized along with the passage of time. Broadly speaking, it is the difference between the surface temperature of the device under test and the surface temperature of the reference body of the ambient temperature. In electrical and electronic devices, it is the temperature of the individual components above the ambient temperature. According to the non-contact infrared array temperature sensor, temperature alarm is carried out according to the temperature of a certain point or a certain area and the rate of temperature rise in a time period.
In the peripheral numerical temperature difference method, an infrared image is essentially a temperature distribution image of an actual scene, so that temperature is the most important characteristic of the infrared image. Since the change in temperature reflects the change in the amount of radiation, the temperature difference can be analyzed as an index. The temperature difference method is a temperature difference between the highest temperature and the lowest temperature of different tested devices or different parts of the same tested device within a period of time in a broad sense. Therefore, based on the infrared target detection of the image processing, whether the temperature of a certain area is abnormal or not is judged according to the comparison between the temperature of the detected object and the ambient temperature. The temperature difference method result is also used as the basis for monitoring the change of the acquisition frequency of the dot-matrix sensor, the temperature difference between the normal cable accessories and the environment is small (especially in a tunnel), the acquisition frequency is low, and once the temperature difference is obvious, the acquisition frequency is increased by the system at once.
Multi-state data processing: the current operation condition (normal operation/general defect/major defect/emergency defect) of the equipment is obtained through comprehensive analysis of historical temperature, ambient temperature, load current and other data.
And the temperature difference method is utilized to improve the acquisition frequency.
And dynamically adjusting the temperature acquisition frequency by using the change of the running current.
Example two
The embodiment provides an abnormal judgment system for cable accessory temperature data, which comprises:
a temperature acquisition module configured to acquire a surface temperature image and an ambient temperature image of the cable accessory;
the temperature calculation module is configured to analyze and process the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature;
the temperature rise rate calculation module is configured to analyze and process the surface temperature image of the cable accessory in a set time period to obtain the rate of the surface temperature rise of the cable accessory in the set time period;
and the temperature alarm module is configured to alarm the temperature when the difference value between the surface temperature of the cable accessory and the ambient temperature is greater than zero and the height rate of the surface temperature of the cable accessory is greater than a threshold value in a set time period.
It should be noted here that the temperature acquisition module, the temperature calculation module, the temperature rise rate calculation module, and the temperature alarm module correspond to steps 1 to 4 in the first embodiment, and the modules are the same as the corresponding steps in the implementation example and application scenarios, but are not limited to the disclosure in the first embodiment. It should be noted that the modules described above as part of a system may be implemented in a computer system such as a set of computer-executable instructions.
In the foregoing embodiments, the descriptions of the embodiments have different emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The proposed system can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the above-described modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules may be combined or integrated into another system, or some features may be omitted, or not executed.
EXAMPLE III
The present embodiments also provide a computer-readable storage medium for storing computer instructions, which when executed by a processor, perform the method of the first embodiment.
Example four
The present embodiment also provides a computer device, including:
one or more processors, one or more memories, and one or more computer programs; wherein, a processor is connected with the memory, the one or more computer programs are stored in the memory, and when the electronic device runs, the processor executes the one or more computer programs stored in the memory, so as to make the electronic device execute the method according to the first embodiment.
It should be understood that in this embodiment, the processor may be a central processing unit CPU, and the processor may also be other general purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate arrays FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include both read-only memory and random access memory and may provide instructions and data to the processor, and a portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software.
The method in the first embodiment may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A cable accessory temperature data abnormity judgment method is characterized by comprising the following steps:
step 1: acquiring a surface temperature image and an environment temperature image of the cable accessory;
step 2: analyzing and processing the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature;
and step 3: analyzing and processing the surface temperature image of the cable accessory in a set time period to obtain the rising rate of the surface temperature of the cable accessory in the set time period;
and 4, step 4: and when the difference value between the surface temperature of the cable accessory and the ambient temperature is greater than zero and the speed of the surface temperature height of the cable accessory is greater than a threshold value in a set time period, performing temperature alarm.
2. The method for judging abnormality of cable accessory temperature data according to claim 1, wherein the collecting of the cable accessory temperature data specifically includes:
selecting cable accessories in a region to be detected;
and acquiring a surface temperature image and an environment temperature image of the cable accessory by using the non-contact infrared array temperature monitoring sensor.
3. The cable accessory temperature data abnormality determination method according to claim 2, wherein imaging is performed for a surface temperature image of the cable accessory:
displaying a surface temperature image of the cable accessory at a certain moment;
the highest, lowest and average values of the surface temperature data of the cable accessory are displayed.
4. The cable accessory temperature data abnormality judgment method according to claim 1, further comprising:
collecting the load current change of the cable accessory;
and dynamically adjusting the temperature acquisition frequency in combination with the rate of the surface temperature rise of the cable accessory in a set time period.
5. The cable accessory temperature data abnormality judgment method according to claim 1, further comprising:
comprehensively analyzing the surface temperature, the environment temperature and the load current data of the cable accessory;
and obtaining the current running condition of the cable.
6. The method for judging the abnormality of the temperature data of the cable accessory according to claim 1, wherein the operating temperature range of the non-contact infrared array temperature monitoring sensor is as follows: -40 ℃ to 85 ℃.
7. The method for judging the abnormality of the temperature data of the cable accessory according to claim 1, wherein the monitoring temperature range of the non-contact infrared array temperature monitoring sensor is as follows: -40 ℃ to 300 ℃.
8. An abnormality determination system for cable accessory temperature data, comprising:
a temperature acquisition module configured to acquire a surface temperature image and an ambient temperature image of the cable accessory;
the temperature calculation module is configured to analyze and process the surface temperature image and the environment temperature image of the cable accessory to obtain a difference value between the surface temperature of the cable accessory and the environment temperature;
the temperature rise rate calculation module is configured to analyze and process the surface temperature image of the cable accessory in a set time period to obtain the rate of the surface temperature rise of the cable accessory in the set time period;
and the temperature alarm module is configured to alarm the temperature when the difference value between the surface temperature of the cable accessory and the ambient temperature is greater than zero and the height rate of the surface temperature of the cable accessory is greater than a threshold value in a set time period.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of a method for determining an abnormality in cable accessory temperature data according to any one of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to perform the steps of a method for determining an abnormality in cable accessory temperature data according to any one of claims 1 to 7.
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| CN117169658A (en) * | 2023-11-03 | 2023-12-05 | 四川省东舜智能科技有限公司 | Photoelectric hybrid cable monitoring method |
| CN117169658B (en) * | 2023-11-03 | 2024-02-02 | 四川省东舜智能科技有限公司 | Photoelectric hybrid cable monitoring method |
| CN117872040A (en) * | 2024-03-13 | 2024-04-12 | 山东理工大学 | Power cable accessory fault diagnosis system and method based on temperature difference comparison |
| CN117872040B (en) * | 2024-03-13 | 2024-05-28 | 山东理工大学 | Power cable accessory fault diagnosis system and method based on temperature difference comparison |
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