A portable high-voltage test rod tester and its implementation process

Abstract

The present invention relates to the technical field of testing power equipment, and more specifically to a portable high-voltage test rod tester and its implementation process. The present invention is achieved through the following technical solutions: The present invention proposes a portable high-voltage test rod tester, comprising a plastic L-shaped shell, wherein a photoelectric sensor and an electroacoustic sensor are symmetrically arranged at the head position of the first side of the L-shaped shell, a high-voltage source is provided in front of the photoelectric sensor and the electroacoustic sensor, a high-voltage discharge needle is provided in front of the high-voltage source, a power supply is provided at the bottom of the second side of the L-shaped shell, a screen is provided at the upper position of the rear side surface of the second side of the L-shaped shell, a speaker is provided at the lower position of the rear side surface of the second side of the L-shaped shell, and a control button is provided between the speaker and the screen. The present invention obtains real-time voltage through a special calculation method, without the need for high-voltage sampling, thereby reducing the complexity of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of testing of electric power equipment, and in particular to a tester for a portable high-voltage electric test rod and an implementation process thereof. Background Art

[0002] A high-voltage tester is a device used to detect voltage levels. It emits an audible and visual alarm when approaching a high-voltage power source. Capacitive high-voltage testers are tested based on a starting voltage test of the appliance, in accordance with power system requirements and product safety. This test primarily involves performing an equivalent voltage boost on the instrument, with a starting voltage of 0.15-0.4 times the rated voltage. However, existing test equipment is often bulky and complex to operate, making it difficult to meet daily portability requirements. Summary of the Invention

[0003] In order to solve the defects of the prior art, the present invention provides a tester for a portable high-voltage test rod and an implementation process.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] The present invention proposes a portable high-voltage test rod tester, including a plastic L-shaped shell, a photoelectric sensor and an electroacoustic sensor are symmetrically arranged at the head position of the first side of the L-shaped shell, a high-voltage source is provided in front of the photoelectric sensor and the electroacoustic sensor, a high-voltage discharge needle is provided in front of the high-voltage source, a power supply is provided at the bottom of the second side of the L-shaped shell, a screen is provided at the upper position of the rear side surface of the second side of the L-shaped shell, a speaker is provided at the lower position of the rear side surface of the second side of the L-shaped shell, and a control button is provided between the speaker and the screen.

[0006] According to the tester of the portable high-voltage test rod, a touch switch is provided at the front position of the lower side surface of the first side of the L-shaped shell; snap interfaces are symmetrically provided at the front positions of the left and right sides of the first side of the L-shaped shell; and an operation button is provided at the middle position of the front side surface of the second side of the L-shaped shell.

[0007] According to the portable high-voltage test rod tester, the screen is used to display the voltage level and alarm status; the control button is used to adjust the system settings; the speaker uses a low-frequency speaker whose sound frequency does not overlap with the sound frequency of the high-voltage test rod, and is used to issue prompt sounds and work warnings.

[0008] According to the tester of the portable high-voltage test rod, it also includes a high-voltage protective cover, and a buckle is provided in the middle part of the high-voltage protective cover, and the high-voltage protective cover can be installed on the tester through the buckle and the bayonet interface.

[0009] According to the portable high-voltage test rod tester, the high-voltage source uses a resonant transformer to generate high-frequency high voltage and is located at the head position of the first side of the L-shaped shell.

[0010] According to the portable high-voltage tester, the power supply uses lithium-ion batteries connected in series and is provided with a charge-discharge integrated equalization protection board to provide a DC power supply for the entire system.

[0011] According to the tester of the portable high-voltage electric test rod, it also includes a control circuit, and the control circuit includes an STM32F407 single-chip microcomputer and a DC voltage regulator module;

[0012] The power supply of the STM32F407 single-chip microcomputer module is stepped down to the operating voltage by the DC voltage regulator module;

[0013] The STM32F407 microcontroller uses TC4420 to control the switching state of the IRF3205 N-channel power field effect transistor (MOSFET) connected to the primary coil, thereby controlling the high voltage generated by the self-excited oscillator;

[0014] The STM32F407 microcontroller controls the UC1525B pulse width modulator to generate a PWM signal, and then controls the switching state of the IRF3205 MOSFET to change the voltage of the primary coil to control the high voltage generated by the resonant transformer.

[0015] According to the portable high-voltage test rod tester, the photoelectric sensor and electroacoustic sensor are APDS-9253 001 photoelectric sensor and SPH0641LU4H-1 electroacoustic sensor, respectively, which are connected through the GPIO port of the single-chip computer, and the sound and light frequencies emitted by the high-voltage test rod are separated by a filter to monitor whether the high-voltage test rod emits an sound and light alarm.

[0016] The implementation process of the portable high-voltage test rod tester includes the following steps:

[0017] Step 1: Mix two-component JH5539 epoxy resin and mix them thoroughly at room temperature. After thorough mixing, put them into a vacuum operation box together with the resonant transformer coil and evacuate. The mixing time should not exceed 2 minutes. The vacuum should be completed within 8 minutes after mixing. The mixture should be thoroughly mixed. Do not cast the coil at this time. The sign of vacuuming completion is that there are no bubbles in the epoxy resin and the vacuum degree is greater than -100kPa.

[0018] Step 2: Slowly introduce SF6 into the vacuum operation box until it reaches one tenth of the atmospheric pressure, i.e. 0.1 atmosphere. When the mixing is completed 25-30 minutes later or the viscosity is greater than 200CS, use a heater to heat the epoxy resin to 60 degrees Celsius. Use a microporous foaming nozzle with a bubble diameter of 0.05-0.1mm. The microporous foaming nozzle introduces SF6 into the interior for foaming. Maintain the atmospheric pressure of the vacuum operation box continuously, and the fluctuation shall not exceed plus or minus 20%. When the foaming volume reaches 18 times the original epoxy resin volume, maintain heating at 60 degrees and slowly cast the coil. After the first casting is completed, slowly introduce SF6 to increase the atmospheric pressure to 0.5 atmospheres, cast again, and continue to introduce SF6 until the atmospheric pressure is reached to complete the last casting. The above time shall not exceed 15 minutes. Stop heating after casting.

[0019] Step 3: Let the coil module stand for three hours. After completion, take out the number and number the resonant transformer. Next, perform a withstand voltage test and quality inspection. After the quality inspection is completed, measure the Q value and laser mark the shell. Set the factory parameters of each instrument according to the marking information.

[0020] Step 4, calculate the voltage. The STM32F407 microcontroller is used to control the duty cycle of the PWM signal to D, thereby adjusting the average voltage V1_avg of the primary coil (V1_avg = D * V1_max). The voltage V2 of the secondary coil (high-voltage source) is determined by the voltage V1_avg of the primary coil, the turns ratio of the coil (N2 / N1), the Q value of the coil, and the compensation coefficient Kr. The turns ratio of the coil refers to the ratio of the number of turns N2 of the secondary coil to the number of turns N1 of the primary coil. The Q value of the coil is determined by the physical properties of the coil itself, and the compensation coefficient Kq is calculated from the Q value, Kq = Q / (Q + 1);

[0021] Kq is a compensation coefficient between 0 and 1. Its function is to convert the Q value into a coefficient that can be directly used for voltage calculation.

[0022] The calculation process of the secondary coil voltage V2 is as follows:

[0023] (V2 = V1_avg * (N2 / N1) * Q / (Q + 1) * Kr

[0024] Among them, the Kr compensation coefficient function is a bell-shaped curve corresponding to the normal distribution, and its shape is determined by its mean μ and standard deviation σ.

[0025] Therefore, the compensation coefficient Kr can be expressed as:

[0026] Kr(D) = exp(-(D - μ)^2 / (2 * σ^2))

[0027] Where exp() is the exponential function, D is the PWM duty cycle, μ is the duty cycle at which the resonant transformer reaches the maximum voltage, and σ is the standard deviation;

[0028] In this case, the compensation coefficient Kr is a function based on the duty cycle D. When D = μ, Kr reaches its maximum, that is, 1. Therefore, μ needs to be set to the duty cycle that makes the resonant transformer reach the maximum voltage. σ determines the width of the bell curve, that is, the rate of decrease of Kr when the duty cycle D deviates from μ. The selection of σ needs to be balanced according to the characteristics of the resonant transformer and the demand for voltage control accuracy. It will be calibrated and entered into the firmware of each tester before leaving the factory.

[0029] The final output voltage V2 is calculated as follows:

[0030] V2 = V1_avg * (N2 / N1) * Kq * Kr(D)

[0031] In the above formula, V1_avg is the average voltage of the primary coil, N1 is the number of turns of the primary coil, N2 is the number of turns of the secondary coil, Q is the Q value of the coil, and Kr is the compensation coefficient. This formula is used to calculate the voltage of the secondary coil based on the primary coil voltage, the coil turns ratio, the Q value, and the compensation coefficient Kr.

[0032] The microcontroller gradually increases the voltage based on the calculation results, and the speed of increase can be adjusted by the setting button;

[0033] Step 5: The STM32F407 MCU displays the calculated voltage on the screen and monitors its alarm status in real time. When the sound and light sensor detects the sound and light alarm from the high-voltage test rod, the MCU immediately records the current voltage and controls the buzzer to sound an alarm.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention obtains real-time voltage through a special calculation method, without the need for high-voltage sampling, thus reducing the complexity of the device.

[0036] 2. The present invention meets the requirements of portability and high accuracy, and can accurately read and display the current voltage level at the moment when the high-voltage test rod emits an audible and visual alarm. Its practicality and operability have been significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The specification of a patent application entitled "A portable high-voltage test rod tester and its implementation process" includes 6 drawings, the drawings of which are described as follows.

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the tester of the present invention;

[0039] Figure 2 It is a front view of the tester of the present invention;

[0040] Figure 3 is a side view of the tester of the present invention;

[0041] Figure 4 is a top view of the tester of the present invention;

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of the high-voltage protective cover of the present invention;

[0043] Figure 6 It is a schematic diagram of the circuit structure of the present invention.

[0044] In the figure: 1. L-shaped shell, 101. First side of L-shaped shell, 102. Second side of L-shaped shell, 2. Photoelectric sensor, 3. Electroacoustic sensor, 4. High-voltage source, 5. High-voltage discharge needle, 6. Screen, 7. Speaker, 8. Control button, 9. Touch switch, 10. Snap interface, 11. Operation button, 12. High-voltage protective cover, 13. Snap. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] like Figure 1-6 As shown, the present invention provides a technical solution:

[0047] like Figure 1-4As shown, a portable high-voltage test rod tester includes a plastic L-shaped shell 1. A photoelectric sensor 2 and an electroacoustic sensor 3 are symmetrically arranged at the head position of the first side 101 of the L-shaped shell. The photoelectric sensor 2 and the electroacoustic sensor 3 are respectively an APDS-9253001 photoelectric sensor and an SPH0641LU4H-1 electroacoustic sensor. They are connected through the GPIO port of the single-chip microcomputer, and the sound and light frequencies emitted by the high-voltage test rod are separated by a filter to monitor whether the high-voltage test rod emits an sound and light alarm. A high-voltage source 4 is provided in front of the photoelectric sensor 2 and the electroacoustic sensor 3. The high-voltage source 4 uses a resonant transformer to generate high frequency and high voltage. It is located at the head position of the first side 101 of the L-shaped shell. A high-voltage discharge needle 5 is provided on the side, a power supply is provided at the bottom of the second side 102 of the L-shaped shell, a screen 6 is provided at the upper position of the rear side of the second side 102 of the L-shaped shell, the screen 6 is used to display the voltage level and alarm status, a speaker 7 is provided at the lower position of the rear side of the second side 102 of the L-shaped shell, the speaker 7 uses a low-frequency speaker whose sound frequency does not overlap with the sound frequency of the high-voltage test rod, and is used to issue prompt sounds and work warnings, a control button 8 is provided between the speaker 7 and the screen 6, the control button 8 is used to adjust the system settings, a touch switch 9 is provided at the front position of the lower side of the first side 101 of the L-shaped shell, and a snap-on interface 10 is symmetrically provided at the front positions of the left and right sides of the first side 101 of the L-shaped shell, and an operation button 11 is provided in the middle part of the front side of the second side 102 of the L-shaped shell.

[0048] like Figure 1 As shown in FIG5 , the high-voltage protective cover 12 is also included. A buckle 13 is provided in the middle of the high-voltage protective cover 12 . The high-voltage protective cover 12 can be installed on the tester through the buckle 13 and the bayonet interface 10 .

[0049] like Figure 6 As shown, it also includes a control circuit, which includes an STM32F407 microcontroller and a DC voltage regulator module;

[0050] The power supply of the STM32F407 MCU module is stepped down to the operating voltage by the DC voltage regulator module;

[0051] The STM32F407 microcontroller uses the TC4420 to control the switching state of the IRF3205 N-channel power field-effect transistor (MOSFET) connected to the primary coil, thereby controlling the high voltage generated by the self-excited oscillator;

[0052] The STM32F407 microcontroller controls the UC1525B pulse width modulator to generate a PWM signal, and then controls the switching state of the IRF3205 MOSFET to change the voltage of the primary coil to control the high voltage generated by the resonant transformer.

[0053] A process for implementing a portable high-voltage test rod tester includes the following steps:

[0054] The following steps need to be carried out in a vacuum operation box, which is also known as a vacuum glove box. It is a well-known device that can perform delicate operations under vacuum.

[0055] Step 1: Mix two-component JH5539 epoxy resin and mix them thoroughly at room temperature. After thorough mixing, put them into a vacuum operation box together with the resonant transformer coil and evacuate. The mixing time should not exceed 2 minutes. The vacuum should be completed within 8 minutes after mixing. The mixture should be thoroughly mixed. Do not cast the coil at this time. The sign of vacuuming completion is that there are no bubbles in the epoxy resin and the vacuum degree is greater than -100kPa.

[0056] Step 2: Slowly introduce SF6 into the vacuum operation box until it reaches one tenth of the atmospheric pressure, i.e. 0.1 atmosphere. When the mixing is completed 25-30 minutes later or the viscosity is greater than 200CS, use a heater to heat the epoxy resin to 60 degrees Celsius. Use a microporous foaming nozzle with a bubble diameter of 0.05-0.1mm. The microporous foaming nozzle introduces SF6 into the interior for foaming. Maintain the atmospheric pressure of the vacuum operation box continuously, and the fluctuation shall not exceed plus or minus 20%. When the foaming volume reaches 18 times the original epoxy resin volume, maintain heating at 60 degrees and slowly cast the coil. After the first casting is completed, slowly introduce SF6 to increase the atmospheric pressure to 0.5 atmospheres, cast again, and continue to introduce SF6 until the atmospheric pressure is reached to complete the last casting. The above time shall not exceed 15 minutes. Stop heating after casting.

[0057] Step 3: Let the coil module stand for three hours. After completion, take out the number and number the resonant transformer. Next, perform a withstand voltage test and quality inspection. After the quality inspection is completed, measure the Q value and laser mark the shell. Set the factory parameters of each instrument according to the marking information.

[0058] Step 4, the high-voltage discharge needle (5) is close to the high-voltage power supply, and the voltage is calculated. The STM32F407 microcontroller is used to control the duty cycle of the PWM signal to D, thereby adjusting the average voltage V1_avg of the primary coil (V1_avg = D * V1_max). The voltage V2 of the secondary coil (high-voltage source) is determined by the voltage V1_avg of the primary coil, the turns ratio of the coil (N2 / N1), the Q value of the coil, and the compensation coefficient Kr. The turns ratio of the coil refers to the ratio of the number of turns N2 of the secondary coil to the number of turns N1 of the primary coil. The Q value of the coil is determined by the physical properties of the coil itself, and the compensation coefficient Kq is calculated from the Q value, Kq = Q / (Q +1) (Q value (Quality factor) is a parameter that describes the frequency characteristics of components such as inductors and capacitors. The larger this value, the better the frequency selectivity of the inductor or capacitor, that is, the stronger the response to a specific frequency.);

[0059] Kq is a compensation coefficient between 0 and 1. Its function is to convert the Q value into a coefficient that can be directly used for voltage calculation.

[0060] When the Q value is very large (that is, the coil quality is very high), Kq will be close to 1; when the Q value is very small (the coil quality is low), Kq will be close to 0. This compensation factor can integrate the coil quality factor into the voltage calculation, so that the voltage calculation result can better reflect the actual situation.

[0061] The calculation process of the secondary coil voltage V2 is as follows:

[0062] (V2 = V1_avg * (N2 / N1) * Q / (Q + 1) * Kr

[0063] Among them, the Kr compensation coefficient function is a bell-shaped curve corresponding to the normal distribution, and its shape is determined by its mean μ and standard deviation σ.

[0064] Therefore, the compensation coefficient Kr can be expressed as:

[0065] Kr(D) = exp(-(D - μ)^2 / (2 * σ^2))

[0066] Where exp() is the exponential function, D is the PWM duty cycle, μ is the duty cycle at which the resonant transformer reaches the maximum voltage, and σ is the standard deviation;

[0067] In this case, the compensation coefficient Kr is a function based on the duty cycle D. When D = μ, Kr reaches its maximum, that is, 1. Therefore, μ needs to be set to the duty cycle that makes the resonant transformer reach the maximum voltage. σ determines the width of the bell curve, that is, the rate of decrease of Kr when the duty cycle D deviates from μ. The selection of σ needs to be balanced according to the characteristics of the resonant transformer and the demand for voltage control accuracy. It will be calibrated and entered into the firmware of each tester before leaving the factory.

[0068] The final output voltage V2 is calculated as follows:

[0069] V2 = V1_avg * (N2 / N1) * Kq * Kr(D)

[0070] In the above formula, V1_avg is the average voltage of the primary coil, N1 is the number of turns of the primary coil, N2 is the number of turns of the secondary coil, Q is the Q value of the coil, and Kr is the compensation coefficient. This formula is used to calculate the voltage of the secondary coil based on the primary coil voltage, the coil turns ratio, the Q value, and the compensation coefficient Kr.

[0071] The microcontroller gradually increases the voltage based on the calculation results, and the speed of increase can be adjusted by the setting button;

[0072] The present invention obtains real-time voltage through a special calculation method, does not require high-voltage sampling, and reduces the complexity and portability of the device.

[0073] Step 5: The STM32F407 MCU displays the calculated voltage on the screen and monitors its alarm status in real time. When the sound and light sensor detects the sound and light alarm from the high-voltage test rod, the MCU immediately records the current voltage and controls the buzzer to sound an alarm.

[0074] To ensure safety during operation, operators must wear appropriate insulating gloves and shoes and operate in a dry environment. Before testing, turn on the instrument. Upon startup, a self-test will sound to confirm that the audible and visual indicators are functioning properly. Then, place the instrument's sensing area close to the probe being tested. While maintaining the rated distance, press the test button and observe when the audible and visual indicators appear on the probe. The rated distance is determined by the sensitivity distance specified in the probe's manual. If testing the probe's sensitivity at its highest voltage, the distance should meet the probe's maximum sensing distance for that voltage. A video recorder should be used to record the test results in real time to ensure control. By adjusting the voltage, verify that the probe's sensitivity and starting voltage meet the standards. If there are no audible or visual indicators, there may be something wrong with the probe. After testing, both the instrument and the probe should be properly returned to their original locations, dust removed, and stored in a dry, well-ventilated environment. Regularly inspect the instrument according to the instructions in the manual to ensure reliable performance.

[0075] According to the above design, the present invention meets the requirements of portability and high accuracy, and can accurately read and display the current voltage level at the moment when the high-voltage test rod emits an audible and visual alarm. Its practicality and operability are significantly improved.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A portable high-voltage tester, characterized in that: The invention comprises an L-shaped housing (1), wherein a photoelectric sensor (2) and an electroacoustic sensor (3) are symmetrically arranged at the front end of the upper horizontal structure of the L-shaped housing, a high-voltage source (4) is arranged in front of the photoelectric sensor (2) and the electroacoustic sensor (3), a high-voltage discharge needle (5) is arranged in front of the high-voltage source (4), a power supply is arranged at the bottom of the lower vertical structure of the L-shaped housing, a screen (6) is arranged at the upper position of the rear side surface of the second side (102) of the L-shaped housing, a speaker (7) is arranged at the lower position of the screen (6), and a control button (8) is arranged between the speaker (7) and the screen (6); It also includes a control circuit, which includes an STM32F407 single-chip microcomputer and a DC voltage regulator module. The power supply of the STM32F407 single-chip microcomputer module is stepped down to the working voltage by the DC voltage regulator module; the STM32F407 single-chip microcomputer uses TC4420 to control the switching state of the IRF3205 type N-channel power field effect transistor MOSFET connected to the primary coil, thereby controlling the high voltage generated by the self-excited oscillator; the STM32F407 single-chip microcomputer controls the UC1525B pulse width modulator to generate a PWM signal, and then controls the switching state of the IRF3205 MOSFET and changes the voltage of the primary coil to control the high voltage generated by the resonant transformer. The photoelectric sensor (2) and the electroacoustic sensor (3) are respectively an APDS-9253001 photoelectric sensor and an SPH0641LU4H-1 electroacoustic sensor, which are connected through the GPIO port of the single-chip microcomputer, and the sound and light frequency emitted by the high-voltage test rod is separated by a filter to monitor whether the high-voltage test rod emits an sound and light alarm; High voltage test steps: Step 1, the high-voltage discharge needle (5) is close to the high-voltage power supply, and the voltage is calculated. The STM32F407 microcontroller is used to control the duty cycle of the PWM signal to D, thereby adjusting the average voltage V1_avg of the primary coil, V1_avg=D*V1_max, and the voltage V2 of the secondary coil high-voltage source is determined by the average voltage V1_avg of the primary coil, the turns ratio N2 / N1 of the coil, the Q value of the coil, and the compensation coefficient Kr. The turns ratio of the coil refers to the ratio of the number of turns N2 of the secondary coil to the number of turns N1 of the primary coil. The Q value of the coil is determined by the physical properties of the coil itself, and the compensation coefficient Kq is calculated from the Q value, Kq=Q / (Q+1); Kr(D)=exp(-(D-μ)^2 / (2*σ^2)) Where exp() is the exponential function, D is the PWM duty cycle, μ is the duty cycle at which the resonant transformer reaches the maximum voltage, and σ is the standard deviation; The final output voltage V2 is calculated as follows: V2=V1_avg*(N2 / N1)*Kq*Kr(D) In the above formula, V1_avg is the average voltage of the primary coil, N1 is the number of turns of the primary coil, N2 is the number of turns of the secondary coil, Q is the Q value of the coil, and Kr is the compensation coefficient. This formula is used to calculate the voltage of the secondary coil based on the primary coil voltage, the coil turns ratio, the Q value, and the compensation coefficient Kr. The single chip microcomputer gradually increases the voltage according to the calculation results, and the speed of increase is adjusted by the setting button; Step 2: The STM32F407 MCU displays the calculated voltage on the screen and monitors its alarm status in real time. When the sound and light sensor detects that the high-voltage test rod emits an sound and light alarm, the MCU immediately records the current voltage and controls the buzzer to sound an alarm.

2. A portable high-voltage tester according to claim 1, characterized in that: A touch switch (9) is provided at the front position of the lower side surface of the first side (101) of the L-shaped shell; snap-on interfaces (10) are symmetrically provided at the front positions of the left and right side surfaces of the first side (101) of the L-shaped shell; and an operating button (11) is provided at the middle position of the front side surface of the second side (102) of the L-shaped shell.

3. A portable high-voltage tester according to claim 1, characterized in that: The screen (6) is used to display the voltage level and the alarm status; the control button (8) is used to adjust the system settings; the speaker (7) is a low-frequency speaker whose sound frequency does not overlap with the sound frequency of the high-voltage test rod, and is used to emit prompt sounds and work warnings.

4. A portable high-voltage tester according to claim 2, characterized in that: It also includes a high-voltage protective cover (12), wherein a buckle (13) is provided at the middle portion of the high-voltage protective cover (12), and the high-voltage protective cover (12) is mounted on the tester via the buckle (13) and the buckle interface (10).

5. The portable high-voltage tester according to claim 1, characterized in that: The high-voltage source (4) uses a resonant transformer to generate high-frequency high voltage and is located at the head of the first side (101) of the L-shaped housing.

6. The implementation process of the portable high-voltage test rod tester according to any one of claims 1 to 5, characterized in that: The manufacturing steps include: Step 1: Mix two-component JH5539 epoxy resin and mix them thoroughly at room temperature. After thorough mixing, put them into a vacuum operation box together with the resonant transformer coil and evacuate. The mixing time should not exceed 2 minutes. The vacuum should be completed within 8 minutes after mixing. The mixture should be thoroughly mixed. Do not cast the coil at this time. The sign of vacuuming completion is that there are no bubbles in the epoxy resin and the vacuum degree is greater than -100kPa. Step 2: Slowly introduce SF6 into the vacuum operation box until it reaches one tenth of the atmospheric pressure, i.e. 0.1 atmosphere. When the mixing is completed 25-30 minutes later or the viscosity is greater than 200CS, use a heater to heat the epoxy resin to 60 degrees Celsius. Use a microporous foaming nozzle with a bubble diameter of 0.05-0.1mm. The microporous foaming nozzle introduces SF6 into the interior for foaming. Maintain the atmospheric pressure of the vacuum operation box continuously, and the fluctuation shall not exceed plus or minus 20%. When the foaming volume reaches 18 times the original epoxy resin volume, maintain heating at 60 degrees and slowly cast the coil. After the first casting is completed, slowly introduce SF6 to increase the atmospheric pressure to 0.5 atmospheres, cast again, and continue to introduce SF6 until the atmospheric pressure is reached to complete the last casting. The above time shall not exceed 15 minutes. Stop heating after casting. Step 3: Let the coil module stand for three hours. After completion, take out the number and number the resonant transformer. Next, perform a withstand voltage test and quality inspection. After the quality inspection is completed, measure the Q value and laser mark the shell. Set the factory parameters of each instrument according to the marking information. The following high voltage test steps are also included: Step 1, the high-voltage discharge needle (5) is close to the high-voltage power supply, and the voltage is calculated. The STM32F407 microcontroller is used to control the duty cycle of the PWM signal to D, thereby adjusting the average voltage V1_avg of the primary coil, V1_avg=D*V1_max, and the voltage V2 of the secondary coil high-voltage source is determined by the average voltage V1_avg of the primary coil, the turns ratio N2 / N1 of the coil, the Q value of the coil, and the compensation coefficient Kr. The turns ratio of the coil refers to the ratio of the number of turns N2 of the secondary coil to the number of turns N1 of the primary coil. The Q value of the coil is determined by the physical properties of the coil itself, and the compensation coefficient Kq is calculated from the Q value, Kq=Q / (Q+1); Kq is a compensation coefficient between 0 and 1, which is used to convert the Q value into a coefficient that can be directly used for voltage calculation; The calculation process of the secondary coil voltage V2 is as follows: V2=V1_avg*(N2 / N1)*Q / (Q+1)*Kr Among them, the Kr compensation coefficient function is a bell-shaped curve corresponding to the normal distribution, and its shape is determined by its mean μ and standard deviation σ. Therefore, the compensation coefficient Kr is expressed as: Kr(D)=exp(-(D-μ)^2 / (2*σ^2)) Where exp() is the exponential function, D is the PWM duty cycle, μ is the duty cycle at which the resonant transformer reaches the maximum voltage, and σ is the standard deviation; In this case, the compensation coefficient Kr is a function based on the duty cycle D. When D = μ, Kr reaches its maximum, that is, 1. Therefore, it is necessary to set μ to the duty cycle that makes the resonant transformer reach the maximum voltage. σ determines the width of the bell curve, that is, the rate of decrease of Kr when the duty cycle D deviates from μ. The selection of σ needs to be balanced according to the characteristics of the resonant transformer and the demand for voltage control accuracy. The final output voltage V2 is calculated as follows: V2=V1_avg*(N2 / N1)*Kq*Kr(D) In the above formula, V1_avg is the average voltage of the primary coil, N1 is the number of turns of the primary coil, N2 is the number of turns of the secondary coil, Q is the Q value of the coil, and Kr is the compensation coefficient. This formula is used to calculate the voltage of the secondary coil based on the primary coil voltage, the coil turns ratio, the Q value, and the compensation coefficient Kr. The single chip microcomputer gradually increases the voltage according to the calculation results, and the speed of increase is adjusted by the setting button; Step 2: The STM32F407 MCU displays the calculated voltage on the screen and monitors its alarm status in real time. When the sound and light sensor detects that the high-voltage test rod emits an sound and light alarm, the MCU immediately records the current voltage and controls the buzzer to sound an alarm.

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