A method and device for testing the withstand voltage of radio frequency coaxial cable connection medium

Abstract

The present invention relates to the technical field of coaxial cable quality inspection devices, and in particular to a method and device for testing the withstand voltage of a radio frequency coaxial cable connection medium, comprising: obtaining production parameters such as conductor diameter, insulation layer thickness, breakdown voltage and anti-attenuation coefficient; determining withstand voltage grading parameters, and then dividing the withstand voltage strength grades; determining test parameters such as voltage parameters, radio frequency scanning strategies and leakage current thresholds based on the grades; using the test parameters to perform inspections to determine whether the quality inspection is qualified, or to re-match the grades for recycling; determining the number of downgrade inspections based on the grades, adjusting the grades or determining that the cable is unqualified, thereby enriching the judgment criteria for qualified inspection results, improving the recycling rate of inferior finished products, and saving production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of coaxial cable quality inspection devices, and in particular to a method and device for testing the withstand voltage of a radio frequency coaxial cable connection medium. Background Art

[0002] RF coaxial cables are widely used in communications, radar, aerospace, radio and television, and other fields. The voltage resistance performance of their connecting media (such as insulation layer, shielding layer, connector, etc.) is directly related to the safety, stability and reliability of the system.

[0003] A Chinese invention patent (CN110376496A) discloses a port adapter and test device for voltage withstand testing of RF coaxial cable assemblies, which relates to the field of voltage withstand testing of RF coaxial cable assemblies. The port adapter device includes: a first wiring port, suitable for electrically connecting to the negative output port of a voltage withstand tester; a second wiring port, suitable for electrically connecting to the positive output port of the voltage withstand tester; a plurality of test sections, connected in parallel between the first wiring port and the second wiring port, for performing voltage withstand testing on a plurality of RF coaxial cable assemblies; wherein each of the plurality of test sections includes: a RF coaxial interface for plugging in the RF coaxial cable assembly under test; an indicating device for indicating the test results, which is electrically connected to the RF coaxial interface. The multiple test sections of the invention are connected in parallel between the first wiring port and the second wiring port, and can simultaneously perform voltage withstand testing on a plurality of RF coaxial cable assemblies under test, thereby improving test efficiency. However, the following problems still exist:

[0004] 1. Single parameter detection is the main focus, lacking comprehensive evaluation

[0005] Only the breakdown voltage or rated withstand voltage of the medium is tested, and dynamic evaluation is not performed based on multi-dimensional environmental factors such as frequency, temperature, and humidity.

[0006] 2. Single result for test medium

[0007] During the testing process, there are only two results: qualified and unqualified. The possibility of further classification, grading and testing of unqualified media and then recycling and reuse is not considered, resulting in waste of inferior finished product resources. Summary of the Invention

[0008] To this end, the present invention provides a method and device for testing the withstand voltage of a radio frequency coaxial cable connection medium, so as to overcome the problem in the prior art of only making a single judgment on the test results during the withstand voltage test of the radio frequency coaxial cable connection medium, resulting in waste of inferior finished product resources.

[0009] To achieve the above object, the present invention provides, in one aspect, a method for testing the withstand voltage of a radio frequency coaxial cable connection medium, comprising the following steps:

[0010] Obtain the conductor diameter, insulation thickness, breakdown voltage and anti-attenuation coefficient of the production parameters of RF coaxial cables;

[0011] Determining a withstand voltage grading parameter based on the production parameter, and determining a withstand voltage strength grade of the radio frequency coaxial cable connection medium according to the withstand voltage grading parameter;

[0012] Determining the voltage parameter, radio frequency scanning strategy, and leakage current threshold in the test parameters according to the voltage withstand strength level;

[0013] Performing a withstand voltage test on the radio frequency coaxial cable connection medium according to the test parameters, and determining that the radio frequency coaxial cable connection medium has passed the quality inspection based on the test results, or determining that the radio frequency coaxial cable connection medium has been retested and matched to an appropriate withstand voltage strength level for recycling;

[0014] The number of degradation detections is determined based on the voltage withstand strength level, and the voltage withstand strength level is downgraded or adjusted based on the number of degradation detections, or the RF coaxial cable connection medium is determined to be unqualified.

[0015] Furthermore, determining the withstand voltage grading parameter based on the production parameter includes:

[0016] Calculating the ratio of the anti-attenuation coefficient to the standard anti-attenuation coefficient to determine the attenuation coefficient deviation;

[0017] Calculating the product of the conductor diameter and the insulation layer thickness to record the result as the cross-sectional area margin, and determining the ratio of the standard cross-sectional area margin to the cross-sectional area margin as the cross-sectional area margin deviation;

[0018] The natural logarithm of the ratio of the breakdown voltage to the standard breakdown voltage is taken as the breakdown voltage deviation;

[0019] The weighted sum of the attenuation coefficient deviation, the cross-sectional area margin deviation and the breakdown voltage deviation is determined as a withstand voltage grading parameter.

[0020] Furthermore, determining the voltage resistance level of the radio frequency coaxial cable connection medium according to the voltage resistance grading parameter includes:

[0021] If the voltage resistance grading parameter is less than or equal to the first standard voltage resistance grading parameter, the voltage resistance strength grade is determined to be level three voltage resistance strength;

[0022] If the voltage resistance grading parameter is greater than the first standard voltage resistance grading parameter, and the voltage resistance grading parameter is less than or equal to the second standard voltage resistance grading parameter, then the voltage resistance strength grade is determined to be the second level voltage resistance strength;

[0023] Otherwise, the voltage withstand strength grade is determined to be level one voltage withstand strength;

[0024] The first standard voltage resistance grading parameter is smaller than the second standard voltage resistance grading parameter.

[0025] Furthermore, determining the voltage parameter in the test parameters according to the withstand voltage strength level includes:

[0026] determining a grade intensity factor according to the voltage withstand intensity grade;

[0027] Determine the temperature compensation coefficient according to the ambient temperature;

[0028] The product of the standard voltage parameter, the grade intensity factor and the temperature compensation coefficient is determined as the voltage parameter.

[0029] Furthermore, determining the radio frequency scanning strategy in the test parameters according to the withstand voltage strength level includes:

[0030] The radio frequency scanning strategy for the three-level withstand voltage strength is to increase from 0.8 times to 1.5 times the standard working radio frequency, with a step interval of 10 MHz;

[0031] The radio frequency scanning strategy of the second-level withstand voltage strength is to increase from 0.9 times to 1.3 times the standard working radio frequency, with a step interval of 20 MHz;

[0032] The radio frequency scanning strategy of the first-level voltage resistance strength is the standard working radio frequency.

[0033] Furthermore, determining the leakage current threshold in the test parameter according to the withstand voltage strength level includes:

[0034] Mapping the voltage withstand strength level into an exponential relationship;

[0035] Determine the surface leakage response parameters according to the relative humidity of the environment;

[0036] The product of the standard leakage current threshold, the surface leakage response parameter and the exponential relationship is determined as the leakage current threshold.

[0037] Furthermore, performing a withstand voltage test on the radio frequency coaxial cable connection medium according to the test parameters includes:

[0038] applying a voltage corresponding to the voltage parameter to the radio frequency coaxial cable connection medium;

[0039] Obtain the cosine value of the phase difference between the instantaneous voltage value and the current sampling signal;

[0040] A leakage current of the radio frequency coaxial cable connection medium is obtained, and a dielectric loss factor is determined according to the leakage current and a cosine value of the phase difference.

[0041] Furthermore, determining whether the radio frequency coaxial cable connection medium has passed the quality inspection based on the test results, or determining whether the retest matches the appropriate withstand voltage strength level for recycling, includes:

[0042] If the leakage current is less than or equal to the leakage current threshold, and the dielectric loss factor is less than or equal to 0.005, the quality inspection is determined to be qualified;

[0043] Otherwise, make sure to retest and match the appropriate voltage strength level for recycling.

[0044] Further, determining to downgrade the withstand voltage strength level or determining that the radio frequency coaxial cable connection medium is unqualified based on the number of degradation detections includes:

[0045] The result of reducing the withstand voltage strength grade by one level is taken as the downgrade adjustment result;

[0046] If there is no corresponding grade after the downgrade, it is determined that the radio frequency coaxial cable connection medium is unqualified;

[0047] Otherwise, it is determined to downgrade the withstand voltage strength grade.

[0048] In another aspect, the present invention provides a device for testing the withstand voltage of a radio frequency coaxial cable connection medium, comprising:

[0049] Multiple sets of media connectors, which are used to connect to the radio frequency coaxial cable connection media to be tested;

[0050] Data display module, used to display the test results;

[0051] A data acquisition module, which is used to obtain production parameters of the radio frequency coaxial cable;

[0052] A temperature detection module, which is used to detect the ambient temperature;

[0053] a grade assessment module connected to the data acquisition module, configured to determine a withstand voltage grading parameter based on the production parameter, and determine a withstand voltage strength grade of the radio frequency coaxial cable connection medium according to the withstand voltage grading parameter;

[0054] a dynamic decision module, connected to the temperature detection module and the grade assessment module respectively, for determining test parameters according to the withstand voltage strength grade;

[0055] a quality inspection and grading module, connected to the medium connector and the data display module, respectively, for performing a withstand voltage test on the RF coaxial cable connection medium according to the test parameters, determining whether the RF coaxial cable connection medium has passed the quality inspection based on the test results, or determining that the RF coaxial cable connection medium needs to be retested and matched to an appropriate withstand voltage strength grade for recycling, and sending the test results to the data display module;

[0056] a downgrade decision module, which is respectively connected to the data display module, the dynamic decision module, and the quality inspection and grading module, and is used to determine the number of downgrade tests based on the withstand voltage strength level when the quality inspection and grading module determines that the withstand voltage strength level is to be retested and matched appropriately for recycling, determine to downgrade the withstand voltage strength level according to the number of downgrade tests, and send the adjusted withstand voltage strength level to the dynamic decision module;

[0057] Or determine that the radio frequency coaxial cable connection medium is unqualified and send it to the data display module.

[0058] Compared with the prior art, the beneficial effect of the present invention lies in that, by obtaining production parameters such as conductor diameter, insulation layer thickness, breakdown voltage and anti-attenuation coefficient, the voltage resistance grading parameters are determined, and then the voltage resistance strength grades are divided, which enriches the comprehensive dimensions of parameters considered in the process of voltage resistance strength grading, thereby improving the selection accuracy of voltage resistance test parameters; through testing the test parameters, it is determined whether the quality inspection is qualified, or the grade is re-matched for recycling, thereby enriching the qualified judgment results of the RF coaxial cable connection medium detection, and facilitating the classification and recycling of substandard products.

[0059] Furthermore, when determining the voltage resistance strength grade of the RF coaxial cable connection medium according to the voltage resistance grading parameter, the voltage resistance strength grade is determined by comparing the voltage resistance grading parameter with the standard voltage resistance grading parameter, thereby further improving the accuracy of determining the voltage resistance strength grade.

[0060] Furthermore, when determining the voltage parameters in the test parameters according to the voltage resistance strength level, the level intensity factor is determined according to the voltage resistance strength level; the temperature compensation coefficient is determined according to the ambient temperature; and the product of the standard voltage parameter, the level intensity factor and the temperature compensation coefficient is determined as the voltage parameter. By comprehensively considering the voltage resistance conditions and the ambient temperature when determining the voltage parameters, the richness of the detection process parameters is guaranteed, thereby further improving the accuracy of determining the test parameters and ensuring the accuracy of the test.

[0061] Furthermore, by determining the radio frequency scanning strategy in the test parameters according to the withstand voltage strength level, the accuracy of determining the test parameters is further improved, thereby ensuring the accuracy of the test.

[0062] Furthermore, when determining the leakage current threshold in the test parameters according to the withstand voltage strength level, the withstand voltage strength level is mapped to an exponential relationship; the corresponding surface leakage parameter is determined according to the relative humidity of the environment; and the product of the standard leakage current threshold, the corresponding surface leakage parameter and the exponential relationship is determined as the leakage current threshold, thereby further ensuring the richness of the detection process parameters, thereby further improving the accuracy of determining the test parameters and ensuring the accuracy of the test.

[0063] Furthermore, when the RF coaxial cable connection medium is subjected to a withstand voltage test according to the test parameters, a voltage corresponding to the voltage parameter is applied to the RF coaxial cable connection medium; the cosine value of the phase difference between the instantaneous voltage value and the current sampling signal is obtained; the leakage current of the RF coaxial cable connection medium is obtained, and the dielectric loss factor is determined according to the leakage current and the cosine value of the phase difference, thereby further ensuring the richness of the detection process parameters, thereby further improving the accuracy of determining the test parameters and ensuring the accuracy of the test.

[0064] Furthermore, by judging if the leakage current is less than or equal to the leakage current threshold and the dielectric loss factor is less than or equal to 0.005, the quality inspection is judged to be qualified; otherwise, it is determined to re-test and match the appropriate voltage strength level for recycling, which further improves the accuracy of dielectric detection, thereby further improving the accuracy of classified recycling of substandard products.

[0065] Furthermore, by determining to downgrade the withstand voltage strength level according to the number of degradation tests, or determining that the RF coaxial cable connection medium is unqualified, the accuracy of the classified recycling of substandard products is further improved, thereby enriching the judgment criteria for qualified test results during the withstand voltage test of the RF coaxial cable connection medium, thereby improving the recycling rate of substandard finished products and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is a flowchart of the steps of the method for testing the withstand voltage of the radio frequency coaxial cable connection medium according to an embodiment of the present invention;

[0067] Figure 2 This is a flowchart of the steps of determining the voltage parameter in the test parameters according to the withstand voltage strength level according to an embodiment of the present invention;

[0068] Figure 3 This is a flowchart of the steps of determining the leakage current threshold value in the test parameters according to the withstand voltage strength level according to an embodiment of the present invention;

[0069] Figure 4 This is a flowchart of the steps of performing a withstand voltage test on a radio frequency coaxial cable connection medium according to test parameters according to an embodiment of the present invention;

[0070] Figure 5 A structural block diagram of a device for testing the dielectric withstand voltage of a radio frequency coaxial cable connection according to an embodiment of the present invention. DETAILED DESCRIPTION

[0071] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0072] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0073] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0074] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] See also Figure 1 As shown, Figure 1 This is a flowchart of the steps of a method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to an embodiment of the present invention.

[0076] The present invention provides a method for testing the withstand voltage of a radio frequency coaxial cable connection medium, comprising the following steps:

[0077] Step S1, obtaining the conductor diameter, insulation layer thickness, breakdown voltage and anti-attenuation coefficient of the production parameters of the radio frequency coaxial cable;

[0078] Step S2: determining a withstand voltage grading parameter based on the production parameters, and determining a withstand voltage strength grade of the RF coaxial cable connection medium according to the withstand voltage grading parameter;

[0079] Step S3: determining the voltage parameter, radio frequency scanning strategy, and leakage current threshold in the test parameters according to the withstand voltage strength level;

[0080] Step S4: Perform a withstand voltage test on the RF coaxial cable connection medium according to the test parameters, and determine whether the RF coaxial cable connection medium has passed the quality inspection based on the test results, or determine to retest and match the appropriate withstand voltage strength level for recycling;

[0081] Step S5: Determine the number of degradation detections based on the voltage withstand strength level, and determine whether to downgrade the voltage withstand strength level or determine that the RF coaxial cable connection medium is unqualified based on the number of degradation detections.

[0082] Specifically, in step S2, the withstand voltage grading parameters are determined based on the production parameters, including:

[0083] Calculate the ratio of the anti-attenuation coefficient to the standard anti-attenuation coefficient to determine the attenuation coefficient deviation;

[0084] The product of the conductor diameter and the insulation thickness is calculated and recorded as the cross-sectional area allowance, and the ratio of the standard cross-sectional volume allowance to the cross-sectional area allowance is determined as the cross-sectional area allowance deviation;

[0085] The natural logarithm of the ratio of breakdown voltage to standard breakdown voltage is taken as breakdown voltage deviation;

[0086] The weighted sum of the attenuation coefficient deviation, the cross-sectional area margin deviation and the breakdown voltage deviation is determined as the withstand voltage grading parameter.

[0087] Specifically, the voltage grading parameters are calculated and determined according to the following formula:

[0088] ;

[0089] in, is the actual anti-attenuation coefficient, is the standard anti-attenuation coefficient, is the weight coefficient of the anti-attenuation coefficient, is the actual conductor diameter, is the actual insulation thickness, is the standard conductor diameter, is the standard insulation thickness, is the cross-sectional area allowance weight coefficient, is the actual breakdown voltage, is the standard breakdown voltage, is the breakdown voltage weight coefficient, set .

[0090] Preferably, set =0.4, =0.3, 0.3.

[0091] Specifically, in step S2, determining the voltage withstand strength grade of the radio frequency coaxial cable connection medium according to the voltage withstand grade parameter includes:

[0092] If the withstand voltage grading parameter is less than or equal to the first standard withstand voltage grading parameter, the withstand voltage strength grade is determined to be the third level withstand voltage strength;

[0093] If the withstand voltage grading parameter is greater than the first standard withstand voltage grading parameter, and the withstand voltage grading parameter is less than or equal to the second standard withstand voltage grading parameter, the withstand voltage strength grade is determined to be the second level withstand voltage strength;

[0094] Otherwise, the voltage withstand strength grade is determined to be level 1 voltage withstand strength;

[0095] The first standard withstand voltage classification parameter is smaller than the second standard withstand voltage classification parameter.

[0096] Specifically, industrial grade (level 3 voltage resistance L3): , allowing only a comprehensive parameter deviation of plus or minus 5%, ensuring reliability in harsh scenarios such as aerospace;

[0097] Commercial grade (secondary voltage strength L2): , relaxed to 30% deviation to cover process fluctuations in typical scenarios such as communication base stations;

[0098] Civilian grade (Level 1 voltage strength L1): , adapting to the cost control needs of consumer electronics products and allowing for greater design margin reduction.

[0099] See also Figure 2 As shown, Figure 2 This is a flow chart of the steps of determining the voltage parameter in the test parameters according to the voltage resistance strength level according to an embodiment of the present invention.

[0100] Specifically, in step S3, the voltage parameter in the test parameter is determined according to the voltage resistance strength level, including:

[0101] Step S311, determining a grade intensity factor according to the withstand voltage intensity grade;

[0102] Step S312: determining a temperature compensation coefficient according to the ambient temperature;

[0103] Step S313: multiplying the standard voltage parameter, the grade intensity factor, and the temperature compensation coefficient to determine the voltage parameter.

[0104] Specifically, the voltage parameters are calculated and determined according to the following formula:

[0105] ;

[0106] in, is the standard voltage parameter;

[0107] is the grade intensity factor, which is determined by the following formula:

[0108] ;

[0109] in, The highest voltage strength grade. is the current voltage strength level;

[0110] is the temperature compensation coefficient;

[0111] ;

[0112] Where T is the ambient temperature.

[0113] Specifically, in step S3, the radio frequency scanning strategy in the test parameters is determined according to the withstand voltage strength level, including:

[0114] The RF scanning strategy for the third-level voltage withstand strength is to increase from 0.8 times to 1.5 times the standard working RF, with a step interval of 10MHz;

[0115] The RF scanning strategy for the second-level withstand voltage strength is to increase from 0.9 times to 1.3 times the standard working RF, with a step interval of 20MHz;

[0116] The RF scanning strategy for level 1 voltage withstand strength is the standard working RF.

[0117] Specifically, based on the general requirements of IEC61196-1:

[0118] Frequency range coverage principle: The standard requires that the test cover 80% to 150% of the cable's nominal frequency (which directly corresponds to the 0.8f to 1.5f range of the three-level scanning strategy in this embodiment of the present invention).

[0119] ‌Step interval recommendation‌: The scanning step size should not exceed 1% of the nominal frequency, but it can be relaxed for GHz-level cables (1% of 1GHz nominal frequency is 10MHz, which is consistent with the three-level scanning step size).

[0120] Based on the MIL-PRF-31032 military specification:

[0121] Harsh environment compensation: The high-frequency end is required to be extended to 1.5f to test the skin effect under extreme temperatures (matching the three-level strategy), but the lower limit of the low-frequency end is not clear;

[0122] Defect detection density: The resonance point test is required to maintain a 10MHz resolution (consistent with the three-level step).

[0123] Based on the EN50117 communication cable standard:

[0124] Commercial-grade focused frequency band: Limit the test range to 0.9-1.3 times the standard frequency (consistent with the secondary strategy) to avoid over-testing;

[0125] ‌Step efficiency requirement‌: Allow commercial grade to use ‌20MHz step‌ to shorten test cycle.

[0126] See also Figure 3 As shown, Figure 3 This is a flow chart of the steps for determining the leakage current threshold in the test parameters according to the withstand voltage strength level according to an embodiment of the present invention.

[0127] Specifically, in step S3, determining the leakage current threshold in the test parameter according to the withstand voltage strength level includes:

[0128] Step S321, mapping the withstand voltage strength level into an exponential relationship;

[0129] Step S322: determining a surface leakage response parameter according to the relative humidity of the environment;

[0130] Step S323: Determine the leakage current threshold as the product of the standard leakage current threshold, the surface leakage response parameter, and the exponential relationship.

[0131] Specifically, the leakage current threshold is determined by the following formula:

[0132] ;

[0133] in, is the standard leakage current threshold, is an exponential relationship, is the surface leakage effect parameter.

[0134] See also Figure 4 As shown, Figure 4 The present invention is a flowchart of the steps of performing voltage withstand testing on a radio frequency coaxial cable connection medium according to test parameters according to an embodiment of the present invention.

[0135] Specifically, in step S4, a withstand voltage test is performed on the RF coaxial cable connection medium according to the test parameters, including:

[0136] Step S41: applying a voltage corresponding to the voltage parameter to the radio frequency coaxial cable connection medium;

[0137] Step S42: obtaining the cosine value of the phase difference between the instantaneous voltage value and the current sampling signal;

[0138] Step S43: Obtain the leakage current of the radio frequency coaxial cable connection medium, and determine the dielectric loss factor according to the leakage current and the cosine value of the phase difference.

[0139] Specifically, in step S4, determining whether the RF coaxial cable connection medium has passed the quality inspection, or determining whether the re-inspection matches the appropriate withstand voltage strength level for recycling, includes:

[0140] If the leakage current is less than or equal to the leakage current threshold, and the dielectric loss factor is less than or equal to 0.005, the quality inspection is considered to be qualified;

[0141] Otherwise, make sure to retest and match the appropriate voltage strength level for recycling.

[0142] Specifically, the reason why a dielectric loss factor less than or equal to 0.005 is considered to be qualified for quality inspection is that the basic requirement for the tanδ parameter of RF cables in the IEC61196-1 standard is tanδ≤0.005, and the highest level (L3) threshold is set at 0.005, which actually covers the upper limit of the basic level.

[0143] Specifically, the dielectric loss factor is determined by the following formula:

[0144] ;

[0145] in, is the actual measured leakage current;

[0146] is the cosine value of the phase difference between the voltage parameter and the current sampling signal, which is calculated by the following formula:

[0147] ;

[0148] in, The instantaneous voltage value of the nth detection point must have a sampling resolution of ≥16 bits to capture small harmonics.

[0149] The current sampling value at the corresponding moment is usually obtained through a Rogowski coil or a high-voltage differential probe. The bandwidth must cover more than 5 times the test frequency.

[0150] Specifically, in step S5, determining the number of degradation detections based on the withstand voltage strength level, and determining whether to downgrade the withstand voltage strength level or determine that the RF coaxial cable connection medium is unqualified according to the number of degradation detections includes:

[0151] The result of reducing the withstand voltage strength grade by one level is regarded as the downgrade adjustment result;

[0152] If there is no corresponding grade after the downgrade, it is determined that the RF coaxial cable connection medium is unqualified;

[0153] Otherwise, it is determined to downgrade the withstand voltage strength grade.

[0154] Specifically, the number of downgrade detections is calculated using the following formula:

[0155] ;

[0156] See also Figure 5 As shown, Figure 5 A structural block diagram of a device for testing the dielectric withstand voltage of a radio frequency coaxial cable connection according to an embodiment of the present invention.

[0157] The present invention provides a device for testing the withstand voltage of a radio frequency coaxial cable connection medium, comprising:

[0158] Multiple sets of media connectors, which are used to connect to the radio frequency coaxial cable connection media to be tested;

[0159] Data display module, used to display the test results;

[0160] A data acquisition module, which is used to obtain production parameters of the radio frequency coaxial cable;

[0161] A temperature detection module, which is used to detect the ambient temperature;

[0162] A grade assessment module, connected to the data acquisition module, is used to determine a withstand voltage grading parameter based on the production parameters, and to determine the withstand voltage strength grade of the RF coaxial cable connection medium according to the withstand voltage grading parameter;

[0163] A dynamic decision module, which is connected to the temperature detection module and the grade assessment module respectively, and is used to determine the test parameters according to the voltage resistance strength grade;

[0164] The quality inspection and grading module is connected to the medium connector and the data display module respectively, and is used to perform a withstand voltage test on the RF coaxial cable connection medium according to the test parameters, and determine whether the RF coaxial cable connection medium has passed the quality inspection based on the test results, or determine to re-test and match the appropriate withstand voltage strength level for recycling, and send the test results to the data display module;

[0165] A degradation decision module is connected to the data display module, the dynamic decision module, and the quality inspection and grading module respectively. When the quality inspection and grading module determines that the product has been retested and matched with a suitable withstand voltage strength grade for recycling, the degradation decision module determines the number of degradation tests based on the withstand voltage strength grade, adjusts the withstand voltage strength grade based on the number of degradation tests, and sends the adjusted withstand voltage strength grade to the dynamic decision module.

[0166] Or determine that the RF coaxial cable connection medium is unqualified and send it to the display module.

[0167] Specifically, when the downgrade decision module determines to downgrade the withstand voltage strength level, the downgraded withstand voltage strength level is sent to the dynamic decision module to re-determine the test parameters, and the RF coaxial cable connection medium is tested after degradation until it is determined to match the appropriate withstand voltage strength level, or the RF coaxial cable connection medium withstand voltage test is completed after it is determined to be unqualified.

[0168] Specifically, the grade assessment module, dynamic decision module, downgrade decision module and quality inspection and grading module are all installed in the shell of the radio frequency coaxial cable connection medium withstand voltage testing device.

[0169] Specifically, the number of quality inspection connectors can be multiple groups. Figure 5 The number of groups is for reference only and the number of groups protected cannot be limited.

[0170] Specifically, the data input unit, temperature detection module, data display module and quality inspection connector are evenly installed on the shell of the RF coaxial cable connection medium withstand voltage test device or exposed on the outside to facilitate testing operations.

[0171] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0172] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for testing the withstand voltage of a radio frequency coaxial cable connection medium, characterized in that: The following steps are involved: Obtain the conductor diameter, insulation thickness, breakdown voltage and anti-attenuation coefficient of the production parameters of RF coaxial cables; Based on the production parameters, a voltage resistance grading parameter is determined, and according to the voltage resistance grading parameter, a voltage resistance strength grade of the radio frequency coaxial cable connection medium is determined, wherein, Determining the withstand voltage classification parameters based on the production parameters includes: Calculate the ratio of the anti-attenuation coefficient to the standard anti-attenuation coefficient to determine the attenuation coefficient deviation. The product of the conductor diameter and the insulation layer thickness is calculated and recorded as the cross-sectional area margin, and the ratio of the standard cross-sectional area margin to the cross-sectional area margin is determined as the cross-sectional area margin deviation. The natural logarithm of the ratio of the breakdown voltage to the standard breakdown voltage is taken as the breakdown voltage deviation. Determining a weighted sum of the attenuation coefficient deviation, the cross-sectional area margin deviation, and the breakdown voltage deviation as a withstand voltage grading parameter; Determining the voltage parameter, radio frequency scanning strategy, and leakage current threshold in the test parameters according to the voltage withstand strength level; Performing a withstand voltage test on the radio frequency coaxial cable connection medium according to the test parameters, and determining that the radio frequency coaxial cable connection medium has passed the quality inspection based on the test results, or determining that the radio frequency coaxial cable connection medium has been retested and matched to an appropriate withstand voltage strength level for recycling; The number of degradation detections is determined based on the voltage withstand strength level, and the voltage withstand strength level is downgraded or adjusted based on the number of degradation detections, or the RF coaxial cable connection medium is determined to be unqualified.

2. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 1, wherein: Determining the voltage resistance level of the radio frequency coaxial cable connection medium according to the voltage resistance grading parameter includes: If the voltage resistance grading parameter is less than or equal to the first standard voltage resistance grading parameter, the voltage resistance strength grade is determined to be level three voltage resistance strength; If the voltage resistance grading parameter is greater than the first standard voltage resistance grading parameter, and the voltage resistance grading parameter is less than or equal to the second standard voltage resistance grading parameter, then the voltage resistance strength grade is determined to be the second level voltage resistance strength; Otherwise, the voltage withstand strength grade is determined to be level one voltage withstand strength; The first standard voltage resistance grading parameter is smaller than the second standard voltage resistance grading parameter.

3. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 2, wherein: Determining the voltage parameter in the test parameters according to the voltage resistance strength level includes: determining a grade intensity factor according to the voltage withstand intensity grade; Determine the temperature compensation coefficient according to the ambient temperature; The product of the standard voltage parameter, the grade intensity factor and the temperature compensation coefficient is determined as the voltage parameter.

4. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 3, wherein: Determining the radio frequency scanning strategy in the test parameters according to the withstand voltage strength level includes: The radio frequency scanning strategy for the three-level withstand voltage strength is to increase from 0.8 times to 1.5 times the standard working radio frequency, with a step interval of 10 MHz; The radio frequency scanning strategy of the second-level withstand voltage strength is to increase from 0.9 times to 1.3 times the standard working radio frequency, with a step interval of 20 MHz; The radio frequency scanning strategy of the first-level voltage resistance strength is the standard working radio frequency.

5. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 4, wherein: Determining the leakage current threshold in the test parameters according to the withstand voltage strength level includes: Mapping the voltage withstand strength level into an exponential relationship; Determine the surface leakage response parameters according to the relative humidity of the environment; The product of the standard leakage current threshold, the surface leakage response parameter and the exponential relationship is determined as the leakage current threshold.

6. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 5, characterized in that: Performing a withstand voltage test on the radio frequency coaxial cable connection medium according to the test parameters includes: applying a voltage corresponding to the voltage parameter to the radio frequency coaxial cable connection medium; Obtain the cosine value of the phase difference between the instantaneous voltage value and the current sampling signal; A leakage current of the radio frequency coaxial cable connection medium is obtained, and a dielectric loss factor is determined according to the leakage current and a cosine value of the phase difference.

7. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 6, wherein: Determine whether the radio frequency coaxial cable connection medium has passed the quality inspection based on the test results, or determine whether it has been retested and matched with an appropriate withstand voltage strength level for recycling, including: If the leakage current is less than or equal to the leakage current threshold, and the dielectric loss factor is less than or equal to 0.005, the quality inspection is determined to be qualified; Otherwise, make sure to retest and match the appropriate voltage strength level for recycling.

8. The method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to claim 7, wherein: Determining, based on the number of degradation detections, to downgrade the withstand voltage strength level, or determining that the radio frequency coaxial cable connection medium is unqualified, includes: The result of reducing the withstand voltage strength grade by one level is taken as the downgrade adjustment result; If there is no corresponding grade after the downgrade, it is determined that the radio frequency coaxial cable connection medium is unqualified; Otherwise, it is determined to downgrade the withstand voltage strength grade.

9. A device using the method for testing the withstand voltage of a radio frequency coaxial cable connection medium according to any one of claims 1 to 8, characterized in that: include: Multiple sets of media connectors, which are used to connect to the radio frequency coaxial cable connection media to be tested; Data display module, used to display the test results; A data acquisition module, which is used to obtain production parameters of the radio frequency coaxial cable; A temperature detection module, which is used to detect the ambient temperature; a grade assessment module connected to the data acquisition module, configured to determine a withstand voltage grading parameter based on the production parameter, and determine a withstand voltage strength grade of the radio frequency coaxial cable connection medium according to the withstand voltage grading parameter; a dynamic decision module, connected to the temperature detection module and the grade assessment module respectively, for determining test parameters according to the withstand voltage strength grade; a quality inspection and grading module, connected to the medium connector and the data display module, respectively, for performing a withstand voltage test on the RF coaxial cable connection medium according to the test parameters, determining whether the RF coaxial cable connection medium has passed the quality inspection based on the test results, or determining that the RF coaxial cable connection medium needs to be retested and matched to an appropriate withstand voltage strength grade for recycling, and sending the test results to the data display module; a downgrade decision module, which is respectively connected to the data display module, the dynamic decision module, and the quality inspection and grading module, and is used to determine the number of downgrade tests based on the withstand voltage strength level when the quality inspection and grading module determines that the withstand voltage strength level is to be retested and matched appropriately for recycling, determine to downgrade the withstand voltage strength level according to the number of downgrade tests, and send the adjusted withstand voltage strength level to the dynamic decision module; Or determine that the radio frequency coaxial cable connection medium is unqualified and send it to the data display module.

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