Partial discharge instrument and intelligent inspection data acquisition method thereof

Abstract

The invention discloses an intelligent inspection data acquisition method for a partial discharge instrument, and the method comprises the steps: starting a corresponding detection process according to the type of detected equipment; if it is judged that the defect exists, the type and grade of the defect are obtained, and the defect condition is calibrated, specifically, the step comprises the following steps that a to-be-detected part is scanned through an ultrasonic sensor of the partial discharge instrument; and if the detected signal is abnormal, measuring from different angles to eliminate noise influence and determine the position of the fault point, comprising the following steps of: performing measurement at different horizontal angles and vertical angles around the equipment fault point at a certain angle interval; and storing the test result information, and storing the test result information as a preset DAT data format and a WAV audio format. The invention also discloses a partial discharge instrument. According to the partial discharge instrument and the intelligent inspection data acquisition method thereof, the function integration level is further enhanced, and the detection efficiency is improved; the structure is simple and reasonable, and operation, repair and maintenance are easy.

Description

Technical Field

[0001] The present invention relates to the technical field of power inspection equipment, and in particular to a partial discharge instrument and an intelligent inspection data acquisition method thereof. Background Art

[0002] In existing technologies, intelligent inspection is a management method that conducts automatic, efficient, and precise inspections of equipment, facilities, areas, etc. Compared with traditional manual inspections, it has higher efficiency, accuracy, and reliability.

[0003] At present, there are many technical means for detecting power equipment on the market. In terms of partial discharge detection, the commonly used methods are ultrasonic detection and transient ground voltage detection.

[0004] Traditional power equipment testing technologies often suffer from limited functionality and low integration. Most testing equipment can only detect a single parameter and cannot simultaneously capture multiple aspects of information, such as partial discharge and infrared thermal imaging. This results in low testing efficiency and makes it difficult to fully assess the equipment's operating status. Furthermore, the operating procedures for testing equipment are complex and require high levels of professional skills from operators, which to some extent limits the widespread implementation of testing. Furthermore, testing equipment produced by different manufacturers differs in data processing and analysis methods, resulting in a lack of unified criteria for test results, hindering the long-term tracking and comparative analysis of equipment operating status. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a partial discharge instrument and an intelligent inspection data acquisition method thereof, which further enhances functional integration and improves detection efficiency; the structure is streamlined and reasonable, and is easy to operate, repair and maintain.

[0006] To solve the above technical problems, the present invention provides an intelligent inspection data collection method for a partial discharge instrument, comprising the steps of: starting a corresponding inspection process according to the type of device under test; if a defect is detected, obtaining the defect type and level; and calibrating the defect status. The steps include the following:

[0007] S21, scanning the part to be inspected by using the ultrasonic sensor of the partial discharge instrument;

[0008] S22, if the detected signal is abnormal, measurements are taken from different angles to eliminate the influence of noise and determine the location of the fault point, which includes the steps of measuring at different horizontal and vertical angles around the equipment fault point, with each measurement being spaced at a certain angle interval;

[0009] S23, saving the test result information, and storing the test result information in a preset DAT data format and WAV audio format.

[0010] Wherein: according to the type of the device under test, the step of starting the corresponding detection process includes: the step of transient ground voltage inspection, the transient ground voltage inspection step includes:

[0011] S31, detection background value;

[0012] S32, placing the transient voltage sensor close to the outer surface of the metal shell, observing the signal amplitude and comparing it with the background value;

[0013] S33, if there is an abnormality, multiple multi-point detections are performed to find the location of the maximum signal point;

[0014] S34, save the test results and record abnormal conditions.

[0015] Among them, the steps of detecting the background value include the following: selecting metal doors and windows in the switch room away from the switch cabinet, pressing the sensor against the metal doors and windows, and recording the background detection results after the readings stabilize; multiple multi-point detections are performed on different sides, upper and lower parts of the switch cabinet, and each detection is separated by a certain distance.

[0016] Among them, according to the type of the device under test, the steps of starting the corresponding detection process include the following: the infrared inspection step, the infrared inspection step includes:

[0017] S41, avoid direct sunlight and choose suitable environmental conditions;

[0018] S42, setting sensor parameters according to on-site conditions;

[0019] S43, select a suitable temperature measurement mode and aim the infrared lens at the part to be tested for testing.

[0020] Among them, selecting appropriate environmental conditions includes: outdoor testing on a sunny day, avoiding direct sunlight or reflection from the instrument lens; indoor or night testing, avoiding direct light; the ambient temperature is not lower than 5°C and the relative humidity is not greater than 85%; the equipment being tested is a live operating device, avoiding closed obstructions in the line of sight during testing.

[0021] Among them, according to the type of equipment under test, the corresponding detection process is started; if it is determined that a defect is detected, the defect type and level are obtained, and the defect status is calibrated. The step also includes: transmitting data through the Type-C interface and uploading data information to the PC platform. The uploaded data information includes: detection data, defect information or inspection route information.

[0022] In order to solve the above technical problems, the present invention also discloses a partial discharge instrument, wherein a touch screen is fixedly connected to the upper surface of the partial discharge instrument, and an external cable module, a sensor integration module and a TEV module are respectively provided on the front surface of the partial discharge instrument; an ultrasonic wave collector, a visible light camera, a laser positioning component, a laser ranging module and an infrared thermal imaging module are respectively fixedly connected to the lower surface of the partial discharge instrument.

[0023] The implementation of the partial discharge instrument and the intelligent inspection data collection method thereof of the present invention has the following beneficial effects: starting a corresponding inspection process according to the type of the equipment under test; if a defect is detected, obtaining the defect type and level, and calibrating the defect condition, which includes the following steps: scanning the part to be inspected by the ultrasonic sensor of the partial discharge instrument; if the detected signal is abnormal, measuring from different angles to eliminate the influence of noise and determine the location of the fault point, which includes the steps of measuring at different horizontal and vertical angles around the equipment fault point, with each measurement being separated by a certain angle; saving the test result information, and storing the test result information in a preset DAT data format and WAV audio format, further enhancing functional integration and improving inspection efficiency; and having a streamlined and reasonable structure, easy to operate, repair and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a flowchart of the intelligent inspection data collection method of the partial discharge instrument according to an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the front structure of the partial discharge instrument according to an embodiment of the present invention.

[0027] Figure 3 It is a schematic diagram of the back structure of the partial discharge instrument according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] like Figure 1FIG. 1 shows a first embodiment of the partial discharge instrument and its intelligent inspection data acquisition method according to the present invention.

[0030] The partial discharge instrument and its intelligent inspection data collection method in this embodiment include the following steps: starting a corresponding inspection process according to the type of the device under test; if a defect is detected, obtaining the defect type and level; and calibrating the defect status. This step includes the following:

[0031] S21, scanning the part to be inspected by using the ultrasonic sensor of the partial discharge instrument;

[0032] S22, if the detected signal is abnormal, measurements are taken from different angles to eliminate the influence of noise and determine the location of the fault point, which includes the steps of measuring at different horizontal and vertical angles around the equipment fault point, with each measurement being spaced at a certain angle interval;

[0033] S23, saving the test result information, and storing the test result information in a preset DAT data format and WAV audio format.

[0034] In specific implementation, the laser ranging information and image information captured by a high-pixel visible light camera are combined to extract and analyze features of the captured images to identify the key feature points of the equipment. Then, combined with the distance data obtained by laser ranging, triangular geometric relationships are used to accurately calculate the specific position of the fault point in the image (an algorithm for locating defective areas).

[0035] Calculation process: Assume that the positions of two reference points A and B are known, as well as the distances d1 and d2 from the fault point P to these two reference points (obtained through laser ranging), and the distance between points A and B is L. Establish a plane rectangular coordinate system with A as the origin, the coordinates of point B are (L, 0), and the coordinates of point P are (x, y):

[0036]

[0037] Transform the first formula into Substituting into the second formula we get:

[0038]

[0039] Expand and simplify:

[0040]

[0041] Solve for x:

[0042]

[0043] Then substitute the value of x into Find y:

[0044]

[0045] Discard unreasonable solutions according to the actual situation to obtain the coordinates (x, y) of the fault point P;

[0046] Furthermore, in this embodiment, the corresponding detection process is started according to the type of the device under test; if a defect is detected, the defect type and level are obtained, and the defect status is calibrated before the step further includes:

[0047] Start the PD meter, log in to your personal account, enter the distribution network inspection program, obtain the day's work information, download the day's work order information in the distribution network inspection program and enter the inspection mode; confirm the basic information according to the work order content, complete the pre-operation preparation, understand the operation risks, and then start the line inspection steps.

[0048] Furthermore, according to the type of the device under test, the steps of starting the corresponding detection process include: a step of transient ground voltage inspection, which includes:

[0049] S31, detection background value;

[0050] S32, placing the transient voltage sensor close to the outer surface of the metal shell, observing the signal amplitude and comparing it with the background value;

[0051] S33, if there is an abnormality, multiple multi-point detections are performed to find the location of the maximum signal point;

[0052] S34, save the test results and record abnormal conditions.

[0053] Preferably, the steps of detecting the background value include the following: selecting metal doors and windows in the switch room away from the switch cabinet, placing the sensor close to the metal doors and windows, and recording the background detection results after the readings are stable; multiple multi-point detections are performed at different sides, upper and lower parts of the switch cabinet, and each detection is performed at a certain distance.

[0054] Furthermore, according to the type of the device under test, the steps of starting the corresponding detection process include the following: the infrared inspection step, the infrared inspection step includes:

[0055] S41, avoid direct sunlight and choose suitable environmental conditions;

[0056] S42, setting sensor parameters according to on-site conditions;

[0057] S43, select a suitable temperature measurement mode and aim the infrared lens at the part to be tested for testing.

[0058] Among them, selecting appropriate environmental conditions includes: outdoor testing on a sunny day, avoiding direct sunlight or reflection from the instrument lens; indoor or night testing, avoiding direct light; the ambient temperature is not lower than 5°C and the relative humidity is not greater than 85%; the equipment being tested is a live operating device, avoiding closed obstructions in the line of sight during testing.

[0059] During implementation, we established the following algorithm for the infrared inspection process:

[0060] The infrared detector in the infrared thermal imaging module absorbs the infrared radiation from the object and converts it into an electrical signal. After being processed by the signal processing circuit, the electrical signal is converted into a corresponding temperature value based on the relationship between the intensity of the infrared radiation and the temperature of the object.

[0061] Calculation process: The relationship between the radiation power P received by the infrared detector and the object temperature T (unit: Kelvin) can be expressed as follows under certain approximate conditions:

[0062] P=εσT 4

[0063] Among them, ε is the emissivity of the object, which reflects the ability of the object to radiate infrared rays;

[0064] σ is the Stefan-Boltzmann constant. In practical applications, infrared thermal imagers first calibrate and calibrate the electrical signal output by the detector, establishing the relationship between the electrical signal value V and the radiation power P: P = f(V). The temperature T of the object can then be inferred from the above formula:

[0065]

[0066] The suitable environmental conditions are as follows: when testing outdoors on a sunny day, the instrument lens should avoid direct sunlight or reflection; when testing indoors or at night, it should avoid direct light; the ambient temperature should be no less than 5°C, the relative humidity should be no more than 85%, and the weather should be cloudy, overcast or at night; the equipment being tested should be energized and running, and closed obstructions should be avoided in the line of sight during testing.

[0067] Preferably, the corresponding detection process is started according to the type of the device under test; if it is determined that a defect is detected, the defect type and level are obtained, and the defect condition is calibrated. The step also includes: transmitting data through the Type-c interface and uploading the data information to the PC platform. The uploaded data information includes: detection data, defect information or inspection route information.

[0068] like Figure 2-3 As shown, the present invention also discloses a partial discharge instrument, which uses the above-mentioned intelligent inspection data collection method to collect inspection data.

[0069] During specific implementation, a touch screen 2 is fixedly connected to the upper surface of the partial discharge instrument 1, and an external cable module 5, a sensor integration module 4 and a TEV module 6 are provided on the front surface of the partial discharge instrument 1; an ultrasonic wave collector 12, a visible light camera 10, a laser positioning component 8, a laser ranging module 9 and an infrared thermal imaging module 7 are fixedly connected to the lower surface of the partial discharge instrument 1.

[0070] During implementation, the touch screen 2, external cable module 5, sensor integration module 4, TEV module 6, ultrasonic wave collector 12, visible light camera 10, laser positioning component 8, laser ranging module 9 and infrared thermal imaging module 7 provided on the upper and lower surfaces of the partial discharge instrument 1 are respectively hardware devices with corresponding functions for realizing the intelligent inspection data collection method of the partial discharge instrument.

[0071] During operation, an operating button 3 is provided on the front of the upper surface of the PD instrument 1, and a flashlight 11 is fixedly connected to the lower surface of the instrument. A hand-held strap 13 is connected to the lower portion of the instrument 1 via a Japanese-shaped connecting block. When the operator is holding the PD instrument 1 for testing, they can pass their hand through the strap. This greatly reduces the risk of accidentally dropping the PD instrument 1, even in complex environments or those requiring mobile operation, ensuring the safety of the device. It also provides the operator with a more comfortable and stable grip, improving operational convenience and efficiency.

[0072] Furthermore, a rectangular mounting groove is provided on the upper surface of the partial discharge instrument 1, a plurality of arc-shaped grooves are provided at the operation button 3 on the upper surface of the partial discharge instrument 1, a triangular protrusion is provided on the lower surface of the partial discharge instrument 1, and a plurality of through holes are provided inside the triangular protrusion on the lower surface of the partial discharge instrument 1. The external cable module 5 includes Type-C, Morey interface and 3.5mm headphone jack. These different types of interfaces meet the diverse usage requirements of the partial discharge instrument 1. The sensor integration module 4 includes a voice receiver, a distance sensor and a light sensor.

[0073] The partial discharge instrument and its intelligent inspection data collection method in this embodiment initiate a corresponding inspection process based on the type of equipment under test. If a defect is detected, the defect type and level are obtained, and the defect condition is calibrated. This step includes the following: scanning the part to be inspected using the partial discharge instrument's ultrasonic sensor; if the detected signal is abnormal, measuring from different angles to eliminate noise influences and locate the fault point, including the steps of measuring at different horizontal and vertical angles around the equipment fault point, with each measurement separated by a certain angle; and saving the test result information in preset DAT data format and WAV audio format, further enhancing functional integration and improving inspection efficiency. The structure is streamlined and reasonable, and easy to operate, repair, and maintain.

Claims

1. A method for collecting data from an intelligent inspection of a partial discharge instrument, characterized in that: include: Based on the type of device being tested, the corresponding inspection process is started. If a defect is detected, the defect type and level are obtained, and the defect status is calibrated. This step includes the following: S21, scanning the part to be inspected by using the ultrasonic sensor of the partial discharge instrument; S22, if the detected signal is abnormal, measurements are taken from different angles to eliminate the influence of noise and determine the location of the fault point, which includes the steps of measuring at different horizontal and vertical angles around the equipment fault point, with each measurement being spaced at a certain angle interval; S23, saving the test result information, and storing the test result information in a preset DAT data format and WAV audio format.

2. The intelligent inspection data collection method for a partial discharge instrument according to claim 1, characterized in that: The step of starting the corresponding detection process according to the type of the device under test includes: a step of transient ground voltage inspection, and the transient ground voltage inspection step includes: S31, detection background value; S32, placing the transient voltage sensor close to the outer surface of the metal shell, observing the signal amplitude and comparing it with the background value; S33, if there is an abnormality, multiple multi-point detections are performed to find the location of the maximum signal point; S34, save the test results and record abnormal conditions.

3. The intelligent inspection data collection method for a partial discharge instrument according to claim 2, characterized in that: The step of detecting background value comprises the following: Select metal doors and windows in the switch room away from the switch cabinet, place the sensor close to the metal doors and windows, and record the background detection results after the readings stabilize; the multiple multi-point detections are performed on different sides, upper and lower parts of the switch cabinet, and each detection is performed at a certain distance.

4. The intelligent inspection data collection method for a partial discharge instrument according to claim 1, characterized in that: The steps of starting the corresponding detection process according to the type of the device under test include: Below: The steps of infrared inspection include: S41, avoid direct sunlight and choose suitable environmental conditions; S42, setting sensor parameters according to on-site conditions; S43, select a suitable temperature measurement mode and aim the infrared lens at the part to be tested for testing.

5. The intelligent inspection data collection method for a partial discharge instrument according to claim 4, characterized in that: The selection of appropriate environmental conditions includes: When testing outdoors on a sunny day, avoid direct sunlight or reflection from the instrument lens; Test indoors or at night, away from direct light; the ambient temperature is not lower than 5°C and the relative humidity is not greater than 85%; The equipment being tested is energized and must be kept away from obstructions in sight during testing.

6. The intelligent inspection data collection method for a partial discharge instrument according to claim 1, characterized in that: According to the type of the device under test, the corresponding detection process is started; If a defect is detected, the steps of obtaining the defect type and level and calibrating the defect status also include: The steps of transmitting data via the Type-C interface and uploading data information to the PC platform include: detection data, defect information or inspection route information.

7. A partial discharge instrument, characterized in that: The partial discharge instrument uses the intelligent inspection data collection method according to any one of claims 1 to 6 to collect inspection data; A touch screen is fixedly connected to the upper surface of the partial discharge instrument, and an external cable module, a sensor integration module and a TEV module are respectively provided on the front surface of the partial discharge instrument; The lower surface of the partial discharge instrument is fixedly connected with an ultrasonic wave collector, a visible light camera, a laser positioning component, a laser ranging module and an infrared thermal imaging module.

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