阅读说明：本技术 电气设备内六氟化硫气体重量在线测定系统 (Online measuring system for weight of sulfur hexafluoride gas in electrical equipment ) 是由 张立军 曾四鸣 刘克成 韩鹤松 高燕宁 石荣雪 王颖楠 于 2021-08-11 设计创作，主要内容包括：本发明提供了一种电气设备内六氟化硫气体重量在线测定系统,该系统包括：压力数据采集模块、有效容积测定模块、无线通信模块、后台监控模块；压力数据采集模块用于采集目标电气设备内六氟化硫气体的压力,并将六氟化硫气体的压力通过无线通信模块发送至后台监控模块；有效容积测定模块用于测量目标电气设备的有效容积,并将有效容积通过无线通信模块发送至后台监控系统；后台监控系统用于根据六氟化硫气体的压力以及有效容积确定目标电气设备内六氟化硫气体的重量。本发明提供的电气设备内六氟化硫气体重量在线测定系统能够实现六氟化硫气体重量的在线测定,为之后六氟化硫气体的充气/回收操作提供有效参考。(The invention provides an online measuring system for the weight of sulfur hexafluoride gas in electrical equipment, which comprises: the device comprises a pressure data acquisition module, an effective volume determination module, a wireless communication module and a background monitoring module; the pressure data acquisition module is used for acquiring the pressure of sulfur hexafluoride gas in the target electrical equipment and transmitting the pressure of the sulfur hexafluoride gas to the background monitoring module through the wireless communication module; the effective volume measuring module is used for measuring the effective volume of the target electrical equipment and sending the effective volume to the background monitoring system through the wireless communication module; the background monitoring system is used for determining the weight of sulfur hexafluoride gas in the target electrical equipment according to the pressure and the effective volume of the sulfur hexafluoride gas. The sulfur hexafluoride gas weight online measuring system in the electrical equipment can realize online measurement of the weight of the sulfur hexafluoride gas and provide effective reference for the subsequent inflation/recovery operation of the sulfur hexafluoride gas.)

1. An online measuring system for sulfur hexafluoride gas weight in electrical equipment is characterized by comprising:

the device comprises a pressure data acquisition module, an effective volume determination module, a wireless communication module and a background monitoring module;

the pressure data acquisition module is used for acquiring the pressure of sulfur hexafluoride gas in target electrical equipment and transmitting the pressure of the sulfur hexafluoride gas to the background monitoring module through the wireless communication module;

the effective volume determination module is used for measuring the effective volume of the target electrical equipment and sending the effective volume to a background monitoring system through the wireless communication module;

the background monitoring system is used for determining the weight of sulfur hexafluoride gas in the target electrical equipment according to the pressure of the sulfur hexafluoride gas and the effective volume.

2. The system for the on-line measurement of the weight of sulfur hexafluoride gas in electrical equipment of claim 1 wherein said pressure data acquisition module is a pressure sensor.

3. The on-line sulfur hexafluoride gas weight measuring system as claimed in claim 1, wherein said pressure data collecting module includes a pressure meter, a camera unit and a pressure meter reading identification unit;

the pressure instrument is used for displaying pressure readings according to the actual pressure of sulfur hexafluoride gas in the target electrical equipment;

the camera shooting unit is used for collecting the number display image of the pressure instrument and sending the number display image to the number display identification unit of the pressure instrument;

the pressure instrument number identification unit is used for identifying the number image, determining the pressure of sulfur hexafluoride gas and sending the pressure of the sulfur hexafluoride to the background monitoring module through the wireless communication module.

4. The system for the on-line measurement of the weight of sulfur hexafluoride gas in electrical equipment of claim 1, wherein said wireless communication module is a 4G/5G network or NB-IOT module.

5. The system for the online measurement of the weight of sulfur hexafluoride gas in electrical equipment of claim 1, wherein the background monitoring system is configured to determine the density of the sulfur hexafluoride based on the pressure of the sulfur hexafluoride and a predetermined pressure density look-up table, and determine the weight of the sulfur hexafluoride gas in the target electrical equipment based on the density of the sulfur hexafluoride gas and the effective volume.

6. The system for the on-line measurement of the weight of sulfur hexafluoride gas in an electrical installation of any one of claims 1 to 5 wherein said background monitoring module includes a processor and a display;

the processor is used for determining the weight of the sulfur hexafluoride gas in the target electrical equipment according to the pressure of the sulfur hexafluoride gas and the effective volume;

the display is used for displaying the weight of sulfur hexafluoride gas in the target electrical equipment.

7. The on-line sulfur hexafluoride gas weight determination system of claim 6 wherein said background monitoring module further includes an indicating unit;

the processor is also used for judging whether the target electrical equipment needs to be inflated or recovered according to the weight of sulfur hexafluoride gas in the target electrical equipment; and if the target electrical equipment needs to be inflated or recovered, controlling the indicating unit to perform inflation prompt or recovery prompt.

8. The on-line sulfur hexafluoride gas weight measuring system as claimed in claim 3, wherein said camera unit is adapted to collect a plurality of sets of reading images of said pressure gauge and to send said plurality of sets of reading images to a reading identification unit of said pressure gauge; wherein each group of reading images corresponds to a specific image shooting angle;

the pressure instrument number identification unit is used for:

respectively carrying out edge detection on the multiple groups of indication images to obtain multiple groups of edge detection images, and determining a target edge detection image of a target sulfur hexafluoride pressure instrument according to the multiple groups of edge detection images;

positioning a pointer and a target number in the target edge detection image to obtain a pointer characteristic vector and a plurality of target number characteristic vectors; the target number is a pre-designated scale number of the target sulfur hexafluoride pressure instrument;

and determining the pressure of sulfur hexafluoride gas based on the pointer characteristic vector and a plurality of target digital characteristic vectors, and sending the pressure of the sulfur hexafluoride to a background monitoring module through the wireless communication module.

9. The on-line sulfur hexafluoride gas weight measurement system of claim 1 wherein said determining a target edge detection image of a target sulfur hexafluoride pressure instrument based on said plurality of sets of edge detection images includes:

and extracting overlapping areas of the multiple groups of edge detection images, and taking the images corresponding to the overlapping areas of the multiple groups of edge detection images as target edge detection images of the target sulfur hexafluoride pressure instrument.

10. The system for the on-line measurement of the weight of sulfur hexafluoride gas in an electrical apparatus of claim 1, wherein said determining the pressure of sulfur hexafluoride gas based on said pointer eigenvector and a plurality of target digital eigenvectors comprises:

determining a plurality of groups of preliminary identification results of the target sulfur hexafluoride pressure instrument based on the pointer characteristic vector and a plurality of target digital characteristic vectors;

and determining the pressure of the sulfur hexafluoride gas according to the average value of the preliminary identification results of the multiple groups of target sulfur hexafluoride pressure instruments.

Technical Field

The invention belongs to the technical field of sulfur hexafluoride gas measurement, and particularly relates to an online measuring system for the weight of sulfur hexafluoride gas in electrical equipment.

Background

Sulfur hexafluoride gas is used as the most common insulating arc extinguishing medium, and has been widely used in various power equipment such as GIS, circuit breakers, voltage (current) transformers and the like, but it has excellent insulating performance and also can generate serious greenhouse effect, and is listed as one of six greenhouse gases which are prohibited to be discharged, so that it is of great importance to recover sulfur hexafluoride gas in electrical equipment.

In practical applications, in order to determine when to recover sulfur hexafluoride gas in electrical equipment and determine when to inflate the electrical equipment, it is necessary to first determine the weight of the sulfur hexafluoride gas in the electrical equipment, and therefore a system for measuring the weight of the sulfur hexafluoride gas is needed.

Disclosure of Invention

The invention aims to provide an online measuring system for the weight of sulfur hexafluoride gas in electrical equipment, so as to realize online measurement of the weight of the sulfur hexafluoride gas in the electrical equipment.

In order to achieve the above object, the present invention provides an online measurement system for the weight of sulfur hexafluoride gas in electrical equipment, comprising:

the device comprises a pressure data acquisition module, an effective volume determination module, a wireless communication module and a background monitoring module;

the pressure data acquisition module is used for acquiring the pressure of sulfur hexafluoride gas in target electrical equipment and transmitting the pressure of the sulfur hexafluoride gas to the background monitoring module through the wireless communication module;

the effective volume determination module is used for measuring the effective volume of the target electrical equipment and sending the effective volume to a background monitoring system through the wireless communication module;

the background monitoring system is used for determining the weight of sulfur hexafluoride gas in the target electrical equipment according to the pressure of the sulfur hexafluoride gas and the effective volume.

Optionally, the pressure data acquisition module is a pressure sensor.

Optionally, the pressure data acquisition module includes a pressure instrument, a camera unit and a pressure instrument number identification unit;

the pressure instrument is used for displaying pressure readings according to the actual pressure of sulfur hexafluoride gas in the target electrical equipment;

the camera shooting unit is used for collecting the number display image of the pressure instrument and sending the number display image to the number display identification unit of the pressure instrument;

the pressure instrument number identification unit is used for identifying the number image, determining the pressure of sulfur hexafluoride gas and sending the pressure of the sulfur hexafluoride to the background monitoring module through the wireless communication module.

Optionally, the wireless communication module is a 4G/5G network or an NB-IOT module.

Optionally, the background monitoring system is configured to determine the density of the sulfur hexafluoride according to the pressure of the sulfur hexafluoride and a preset pressure density comparison table, and determine the weight of the sulfur hexafluoride gas in the target electrical device according to the density of the sulfur hexafluoride gas and the effective volume.

Optionally, the background monitoring module includes a processor and a display;

the processor is used for determining the weight of the sulfur hexafluoride gas in the target electrical equipment according to the pressure of the sulfur hexafluoride gas and the effective volume;

the display is used for displaying the weight of sulfur hexafluoride gas in the target electrical equipment.

Optionally, the background monitoring module further includes an indication unit;

the processor is also used for judging whether the target electrical equipment needs to be inflated or recovered according to the weight of sulfur hexafluoride gas in the target electrical equipment; and if the target electrical equipment needs to be inflated or recovered, controlling the indicating unit to perform inflation prompt or recovery prompt.

Optionally, the camera unit is configured to collect multiple sets of reading images of the pressure instrument, and send the multiple sets of reading images to the reading identification unit of the pressure instrument; wherein each group of reading images corresponds to a specific image shooting angle;

the pressure instrument number identification unit is used for:

respectively carrying out edge detection on the multiple groups of indication images to obtain multiple groups of edge detection images, and determining a target edge detection image of a target sulfur hexafluoride pressure instrument according to the multiple groups of edge detection images;

positioning a pointer and a target number in the target edge detection image to obtain a pointer characteristic vector and a plurality of target number characteristic vectors; the target number is a pre-designated scale number of the target sulfur hexafluoride pressure instrument;

and determining the pressure of sulfur hexafluoride gas based on the pointer characteristic vector and a plurality of target digital characteristic vectors, and sending the pressure of the sulfur hexafluoride to a background monitoring module through the wireless communication module.

Optionally, the determining a target edge detection image of the target sulfur hexafluoride pressure instrument according to the plurality of groups of edge detection images includes:

and extracting overlapping areas of the multiple groups of edge detection images, and taking the images corresponding to the overlapping areas of the multiple groups of edge detection images as target edge detection images of the target sulfur hexafluoride pressure instrument.

Optionally, the determining the pressure of the sulfur hexafluoride gas based on the pointer eigenvector and the plurality of target digital eigenvectors includes:

determining a plurality of groups of preliminary identification results of the target sulfur hexafluoride pressure instrument based on the pointer characteristic vector and a plurality of target digital characteristic vectors;

and determining the pressure of the sulfur hexafluoride gas according to the average value of the preliminary identification results of the multiple groups of target sulfur hexafluoride pressure instruments.

The sulfur hexafluoride gas weight online measuring system in the electrical equipment has the beneficial effects that:

the pressure data acquisition module is used for acquiring the pressure of sulfur hexafluoride gas in the target electrical equipment, the effective volume of the target electrical equipment is measured through the effective volume measuring module, the effective volume and the pressure of the sulfur hexafluoride gas are sent to the background monitoring module through the wireless communication module, and the background monitoring system determines the weight of the sulfur hexafluoride gas in the target electrical equipment according to the pressure of the sulfur hexafluoride gas and the effective volume of the target electrical equipment. In other words, the invention can realize the on-line measurement of the weight of the sulfur hexafluoride gas and provide effective reference for the subsequent inflation/recovery operation of the sulfur hexafluoride gas.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sulfur hexafluoride gas weight online measurement system in an electrical device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an online measurement system for weight of sulfur hexafluoride gas in electrical equipment according to an embodiment of the present invention, where the online measurement system 10 for weight of sulfur hexafluoride gas in electrical equipment includes:

the pressure data acquisition module 11, the effective volume measurement module 12, the wireless communication module 13 and the background monitoring module 14.

The pressure data acquisition module 11 is used for acquiring the pressure of sulfur hexafluoride gas in the target electrical equipment and sending the pressure of the sulfur hexafluoride gas to the background monitoring module 14 through the wireless communication module 13.

The effective volume determination module 12 is used for measuring the effective volume of the target electrical device and sending the effective volume to the background monitoring system 14 through the wireless communication module 13.

The background monitoring system 14 is used for determining the weight of the sulfur hexafluoride gas in the target electrical equipment according to the pressure and the effective volume of the sulfur hexafluoride gas.

In this embodiment, online measurement of the weight of sulfur hexafluoride gas in the electrical equipment can be realized based on the internet of things.

In this embodiment, the specific method for determining the weight by the background monitoring system 14 is as follows: and determining the density of the sulfur hexafluoride according to the pressure of the sulfur hexafluoride and a preset pressure density comparison table, and determining the weight of the sulfur hexafluoride gas in the target electrical equipment according to the density of the sulfur hexafluoride gas and the effective volume.

In this embodiment, since the electrical equipment further includes other components such as conductors, it is necessary to measure the effective volume of the target electrical equipment, that is, the actual volume of sulfur hexafluoride gas in the target electrical equipment.

As can be seen from the above description, in the present invention, the pressure of the sulfur hexafluoride gas in the target electrical device is collected by the pressure data collection module, the effective volume of the target electrical device is measured by the effective volume measurement module, the effective volume and the pressure of the sulfur hexafluoride gas are sent to the background monitoring module by the wireless communication module, and the background monitoring system determines the weight of the sulfur hexafluoride gas in the target electrical device according to the pressure of the sulfur hexafluoride gas and the effective volume of the target electrical device. In other words, the invention can realize the on-line measurement of the weight of the sulfur hexafluoride gas and provide effective reference for the subsequent inflation/recovery operation of the sulfur hexafluoride gas.

Optionally, as a specific implementation manner of the online measurement system for the weight of sulfur hexafluoride gas in the power equipment provided by the embodiment of the present invention, the pressure data acquisition module is a pressure sensor.

In this embodiment, the pressure data acquisition module may be a pressure sensor with a data transmission function, and directly transmit the pressure of the sulfur hexafluoride gas to the background monitoring system through the pressure sensor.

Optionally, as a specific implementation manner of the online measuring system for the weight of sulfur hexafluoride gas in the power equipment provided by the embodiment of the present invention, the pressure data acquisition module includes a pressure instrument, a camera unit, and a pressure instrument number identification unit.

The pressure instrument is used for displaying pressure readings according to the actual pressure of sulfur hexafluoride gas in the target electrical equipment.

The camera shooting unit is used for collecting the number indicating image of the pressure instrument and sending the number indicating image to the number indicating identification unit of the pressure instrument.

The pressure instrument reading identification unit is used for identifying the reading image, determining the pressure of sulfur hexafluoride gas and sending the pressure of the sulfur hexafluoride to the background monitoring module through the wireless communication module.

In this embodiment, if the environment is limited or the installation difficulty is limited, only a common pressure meter can be used for pressure measurement, and this embodiment provides an image recognition method for recognizing the pressure readings, so as to be suitable for various measurement scenarios.

Optionally, as a specific implementation of the system for online measuring the weight of sulfur hexafluoride gas in the power equipment provided by the embodiment of the present invention, the wireless communication module is a 4G/5G network or an NB-IOT module.

Optionally, as a specific implementation manner of the system for measuring the weight of sulfur hexafluoride gas in the power equipment on line provided by the embodiment of the present invention, the background monitoring module includes a processor and a display.

The processor is used for determining the weight of the sulfur hexafluoride gas in the target electrical equipment according to the pressure and the effective volume of the sulfur hexafluoride gas.

The display is used for displaying the weight of the sulfur hexafluoride gas in the target electrical equipment.

In this embodiment, the processor may be a single chip or a microprocessor.

Optionally, as a specific implementation manner of the online measurement system for the weight of sulfur hexafluoride gas in the power equipment provided by the embodiment of the present invention, the background monitoring module further includes an indication unit.

The processor is also used for judging whether the target electrical equipment needs to be inflated or recycled according to the weight of sulfur hexafluoride gas in the target electrical equipment. And if the target electrical equipment needs to be inflated or recovered, controlling the indicating unit to perform inflation prompt or recovery prompt.

In this embodiment, the indication unit may be an indication lamp, the inflation prompt may be implemented by setting the indication lamp to emit green light, and the recycling prompt may be implemented by setting the indication lamp to emit yellow light.

Optionally, as a specific implementation manner of the sulfur hexafluoride gas weight online measurement system in the power equipment provided by the embodiment of the present invention, the camera unit is configured to collect multiple sets of reading images of the pressure instrument, and send the multiple sets of reading images to the reading identification unit of the pressure instrument. Wherein each set of reading images corresponds to a particular image capture angle.

The pressure instrument number identification unit is used for:

and respectively carrying out edge detection on the multiple groups of indication images to obtain multiple groups of edge detection images, and determining a target edge detection image of the target sulfur hexafluoride pressure instrument according to the multiple groups of edge detection images.

And positioning the pointer and the target number in the target edge detection image to obtain a pointer characteristic vector and a plurality of target number characteristic vectors. The target number is a scale number of a pre-designated target sulfur hexafluoride pressure instrument.

And determining the pressure of the sulfur hexafluoride gas based on the pointer characteristic vector and the plurality of target digital characteristic vectors, and sending the pressure of the sulfur hexafluoride to the background monitoring module through the wireless communication module.

In this embodiment, edge detection may be performed on a plurality of sets of indication images based on a Canny detection algorithm, so as to obtain edge detection images corresponding to the respective sets of indication images, and a target edge detection image of the target sulfur hexafluoride pressure instrument may be determined based on the plurality of sets of edge detection images. It is known that the existing edge detection algorithm mostly sets a global high-low threshold value manually, and therefore the accuracy of edge detection is inevitably affected, and therefore, the embodiment determines a final edge detection result (that is, a target edge detection image) based on a plurality of sets of edge detection images, and can effectively reduce the error interference of the edge detection algorithm, reduce the influence of the surrounding environment of a target sulfur hexafluoride pressure instrument on the edge detection accuracy, and further improve the image identification accuracy.

In this embodiment, before performing edge detection on a plurality of sets of display images, a process of preprocessing the plurality of sets of display images is further included;

preprocessing the plurality of sets of display images includes: and carrying out graying processing, Gaussian filtering and smoothing on the multiple groups of the exponential images to obtain the preprocessed multiple groups of the exponential images.

In this embodiment, the graying, gaussian filtering and smoothing can be performed on a plurality of sets of image data to facilitate the subsequent image recognition step. Optionally, the multiple sets of image data may also be subjected to scaling, changing, denoising, expanding, corroding, and the like as needed, which is not limited herein.

In this embodiment, the feature vector corresponding to the meter pointer and the feature vector corresponding to the target number in the target edge detection image may be extracted based on an existing feature extraction model.

The target number can be the maximum measuring range value, the minimum measuring range value, the measuring range median value and the like of the target sulfur hexafluoride pressure instrument.

Optionally, as a specific implementation manner of the sulfur hexafluoride pressure instrument image identification method provided by the embodiment of the present invention, determining the preliminary identification result of the multiple groups of target sulfur hexafluoride pressure instruments based on the pointer eigenvector and the multiple target digital eigenvectors includes:

and combining the pointer characteristic vector and the plurality of target digital characteristic vectors to obtain a plurality of combined vectors, and respectively inputting the plurality of combined vectors into the image recognition models corresponding to the combined vectors to obtain the initial recognition results of the plurality of groups of target sulfur hexafluoride pressure instruments.

In this embodiment, the combination method of each combination vector is as follows: and forming a combined vector by taking the pointer feature vector and one of the target digital feature vectors as a group. For example, if the pointer feature vector is a and the plurality of target numeric feature vectors are b1, b2, b3, then the combined vector may be ab1, ab2, ab 3.

The image identification model may be a convolutional neural network model, and in this embodiment, a corresponding convolutional neural network model may be trained for each group of combined feature vectors in advance, and after a plurality of combined vectors are obtained, the plurality of combined vectors are respectively input into the convolutional neural network model corresponding to the combined vector, so as to obtain a plurality of groups of preliminary identification results of the target sulfur hexafluoride pressure instrument.

Optionally, as a specific implementation manner of the system for online measuring the weight of sulfur hexafluoride gas in the power equipment provided in the embodiment of the present invention, determining a target edge detection image of a target sulfur hexafluoride pressure instrument according to a plurality of groups of edge detection images includes:

and extracting overlapping areas of the multiple groups of edge detection images, and taking the images corresponding to the overlapping areas of the multiple groups of edge detection images as target edge detection images of the target sulfur hexafluoride pressure instrument.

Optionally, as a specific implementation manner of the system for online measuring the weight of sulfur hexafluoride gas in the power equipment provided by the embodiment of the present invention, the determining the pressure of the sulfur hexafluoride gas based on the pointer eigenvector and the plurality of target digital eigenvectors includes:

and determining the initial identification results of the multiple groups of target sulfur hexafluoride pressure instruments based on the pointer characteristic vectors and the multiple target digital characteristic vectors.

And determining the pressure of the sulfur hexafluoride gas according to the average value of the primary identification results of the multiple groups of target sulfur hexafluoride pressure instruments.

In this embodiment, assuming that the preliminary identification results of the multiple groups of target sulfur hexafluoride pressure meters are x1, x2, and x3, respectively, the pressure of the sulfur hexafluoride gas is (x1+ x2+ x 3)/3.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.