Quick-plug type flange connector for high-frequency sealing environment

Abstract

The invention relates to the technical field of flange connectors, in particular to a quick-plug type flange connector for a high-frequency sealing environment. The external connecting mechanism comprises a plurality of flange terminals; the signal transmission mechanism comprises a plurality of female pins and an inner conductor which is in plug-in connection with the female pins; the signal acquisition module comprises a micro strain gauge array and a plurality of micro eddy current sensors; the insertion force monitoring module is used for judging whether the reed of the female pin has stress relaxation or not based on the fluctuation characteristic parameters; the trajectory tracking module is used for determining local relaxation or overall relaxation of the reed based on the trajectory fitting index; the torque adjusting module is used for determining the increment torque of the split spring based on the radial offset of the reed and optimizing the increment torque; and the loss monitoring module is used for determining whether the contact state of the female pin and the inner conductor is qualified or not based on the signal transmission loss so as to optimize the preset characteristic parameters. The signal transmission stability of the flange connector is improved.

Description

Technical Field

[0001] This invention relates to the field of flange connector technology, and more particularly to a quick-connect flange connector for high-frequency sealing environments. Background Technology

[0002] In fields such as 5G communication, satellite remote sensing, industrial automation, and aerospace, stable transmission of high-frequency signals covering the 1GHz to 60GHz band is the core guarantee for equipment performance. In these scenarios, a large number of devices need to work in harsh environments with strict sealing requirements, such as outdoor, humid, dusty, or corrosive environments. At the same time, in order to meet the maintenance needs of rapid equipment maintenance and module replacement, there is an urgent need for connectors with high frequency and low loss, reliable sealing, and quick plugging and unplugging characteristics. Traditional flange connectors have significant technical shortcomings: On the one hand, most products do not have impedance matching structures optimized for high-frequency signals, which can easily lead to enhanced signal reflection and excessive insertion loss in the GHz and above frequency bands, making it difficult to meet the transmission efficiency requirements of high-frequency communication; on the other hand, traditional sealing flanges rely on multiple bolts for sealing, which is not only cumbersome and time-consuming to install and remove, but also prone to bolt torque decay and aging of seals over long-term use, resulting in decreased sealing performance and allowing external moisture and impurities to intrude, further aggravating signal loss and even damaging the internal structure; in addition, although some quick-connect connectors can simplify insertion and removal operations, their structural design limits their ability to balance sealing reliability and high-frequency transmission performance, making them unsuitable for high-frequency signal transmission scenarios in sealed environments.

[0003] Chinese Patent Application Publication No. CN102148455A discloses a rotatable connector mounted on a flange panel. Without altering the original product's functionality, it reduces the precision requirements of the space used, facilitating normal operation in environments where space control is difficult, and allows for rotation at any angle. The invention includes a housing mounted on a flange. A contact head is located on one side of the housing, and a spring is positioned between the housing and the contact head. A socket is located on one side of the contact head. An insulator is fixedly connected to the contact head. An insulator II is housed within the housing, and a bushing is positioned between the housing and the insulator II. A conductive sealing ring is located at the mating point of the housing panel.

[0004] The following problems exist in the existing technology: When using flange connectors for high-frequency signal transmission, the female pin springs experience stress relaxation due to long-term insertion and removal fatigue, environmental temperature cycles, or vibration and impact. This directly leads to the decrease in their elasticity and a significant drop in the pressure of the inner conductors in opposite contact, which in turn causes signal distortion, increased bit error rate, or even transmission interruption, reducing the signal transmission stability of the flange connector. Summary of the Invention

[0005] To address this issue, the present invention provides a quick-connect flange connector for high-frequency sealing environments, which overcomes the problem in the prior art where the female pin springs experience stress relaxation due to long-term insertion and removal fatigue, environmental temperature cycles, or vibration impacts, which directly leads to elastic decay, a significant decrease in the pressure of the inner conductors in opposing contacts, and consequently, signal distortion, increased bit error rate, or even transmission interruption, thus reducing the signal transmission stability of the flange connector.

[0006] To achieve the above objectives, the present invention provides a quick-connect flange connector for high-frequency sealing environments, comprising: cavity; An external connection mechanism, comprising a plurality of flange terminals symmetrically arranged on both sides of the cavity; A signal transmission mechanism, comprising a plurality of female pins symmetrically arranged at the central axis position of the flange terminal, and an inner conductor inserted into the female pins; The signal acquisition module includes a micro strain gauge array for acquiring the insertion force during the insertion process of the inner conductor and the female pin, and several micro eddy current sensors for detecting the movement trajectory of the inner conductor. The insertion force monitoring module is used to construct the insertion force time-domain curve of the insertion process based on the monitoring results of the micro strain gauge array, and to determine whether the spring of the mother needle has stress relaxation based on the comparison result of the fluctuation characteristic parameter of the fluctuation amplitude in the insertion force time-domain curve and the preset characteristic parameter. The trajectory tracking module is used to determine whether the reed is locally or entirely relaxed based on the trajectory fitting index of the movement trajectory under the condition that the reed is under stress relaxation. The torque adjustment module, in response to the determination that the reed has a local slack, determines the incremental torque of the open spring based on the radial offset of the reed, and optimizes the incremental torque based on the balance index of the contact pressure of the reed. The loss monitoring module is used to determine whether the contact state between the female pin and the inner conductor is qualified based on the signal transmission loss of the flange connector, and to optimize the preset characteristic parameters based on the judgment result that the contact state between the female pin and the inner conductor is unqualified.

[0007] Furthermore, the mother needle has a split spring structure, with an open spring between two adjacent spring segments, and the open spring and the spring segments are connected by independent bolts.

[0008] Furthermore, the insertion force monitoring module determines the coefficient of variation of the amplitude increment of two adjacent fluctuation amplitudes in the insertion force time domain curve as the fluctuation characteristic parameter, wherein the fluctuation amplitude refers to the difference between the peak and trough values ​​of a single fluctuation cycle.

[0009] Furthermore, the insertion force monitoring module determines that the reed has experienced stress relaxation based on the comparison result of the fluctuation characteristic parameter being greater than the preset characteristic parameter.

[0010] Furthermore, the trajectory tracking module aligns the movement trajectory of the inner conductor with the central axis of the mother needle, using the initial insertion end of the inner conductor as a reference point, and determines the standard deviation of the radial distance from the movement trajectory to the central axis of the mother needle as the trajectory fitting index.

[0011] Furthermore, the trajectory tracking module determines that the spring is slack based on the comparison result of the trajectory fitting index being less than or equal to the preset fitting index, and the torque adjustment module calculates the preload compensation value based on the average insertion force to determine the incremental torque of the open spring.

[0012] Furthermore, the trajectory tracking module determines that the reed is locally slack based on the comparison result that the trajectory fitting index is greater than the preset fitting index, and the torque adjustment module determines the incremental torque of the open spring based on the radial offset of the reed.

[0013] Furthermore, the torque adjustment module determines to increase the incremental torque by a first torque adjustment coefficient based on the comparison result that the balance index is greater than the first preset index; The torque adjustment module determines to reduce the incremental torque by a second torque adjustment coefficient based on the comparison result that the balance index is less than the second preset index.

[0014] Furthermore, the loss monitoring module determines that the contact state between the mother needle and the inner conductor is unqualified based on the comparison result that the signal transmission loss is greater than the preset loss.

[0015] Furthermore, when the loss monitoring module determines that the contact state between the mother needle and the inner conductor is unqualified, it determines to reduce the preset characteristic parameter by adjusting the first parameter coefficient based on the comparison result that the difference between the signal transmission loss and the preset loss is greater than the preset difference. The loss monitoring module determines to reduce the preset characteristic parameter by adjusting the second parameter coefficient based on the comparison result that the loss difference is less than or equal to the preset difference.

[0016] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention collects the insertion force during the insertion process of the inner conductor and the female pin using a micro-strain gauge array, constructs a time-domain curve of the insertion force using an insertion force monitoring module, and uses the coefficient of variation of the amplitude increment of two adjacent fluctuations as a fluctuation characteristic parameter to achieve accurate determination of stress relaxation of the female pin spring, thus avoiding high-frequency signal transmission failure caused by relaxation from the source. As a key contact component for high-frequency signal transmission, the elastic stability of the female pin spring directly determines the contact resistance and signal loss. The core principle of this determination logic is that when there is no relaxation, the spring is elastically stable, the contact surface is uniform, the amplitude increment of the insertion force fluctuation is consistent, and the coefficient of variation is small; if the spring relaxes, the elastic decay will break the consistency of the increment, or the overall relaxation will lead to an increase in the dispersion of the amplitude increment, or the local relaxation will cause the amplitude to fluctuate, ultimately resulting in a larger coefficient of variation. Traditional connectors lack real-time relaxation monitoring, which can easily cause contact resistance to rise from milliohms to tens of milliohms due to relaxation, leading to enhanced high-frequency signal reflection and excessive insertion loss. However, this invention, through its monitoring mechanism, can identify problems in the early stages of relaxation, avoiding risks such as signal distortion and increased bit error rate. At the same time, it eliminates interference from single skew and temporary foreign objects, ensuring accurate judgment and thus improving the stability of signal transmission in high-frequency sealed environments.

[0017] Furthermore, this invention, through the synergy of a trajectory tracking module and a torque adjustment module, achieves precise differentiation of slack types and targeted compensation of preload, effectively restoring the contact pressure of the springs and extending the connector's service life. The trajectory tracking module, based on the movement trajectory collected by a miniature eddy current sensor, uses the radial distance standard deviation as the trajectory fitting index to differentiate slack types. In cases of overall slack, the elasticity of all springs decays uniformly, the inner conductor trajectory is parallel to the female pin axis, and the standard deviation is small. In cases of localized slack, the elasticity of single / multi-lobed springs is weak, the inner conductor shifts towards the slack lobe, the radial distance of the trajectory fluctuates irregularly, and the standard deviation is large. The torque adjustment module provides differentiated compensation accordingly: in cases of overall slack, all open springs are adjusted simultaneously; in cases of localized slack, only the slack lobe spring is adjusted, and the torque is optimized through a contact pressure equalization index. This allows the contact pressure of each lobe to be restored after compensation while avoiding damage to the spring structure from over-adjustment, thereby further improving the stability of signal transmission in high-frequency sealed environments.

[0018] Furthermore, this invention optimizes preset characteristic parameters through a loss monitoring module and combines glass sintering sealing with a replaceable flange terminal design, balancing high-frequency transmission performance, sealing reliability, and ease of maintenance. The loss monitoring module determines the contact state based on signal transmission loss measured by a vector network analyzer. If the contact state is deemed unqualified, the preset characteristic parameters are adjusted according to the loss difference to avoid misjudgments / missed judgments caused by interference. Simultaneously, the glass sintering sealed connector achieves an IP68-level seal through welding, resisting moisture and dust intrusion in high-frequency sealed environments; the flange terminals can be replaced individually, solving the pain point of traditional connectors requiring complete replacement upon terminal failure and reducing maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the quick-connect flange connector for high-frequency sealing environments according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the flange terminal and sealing connector according to an embodiment of the present invention; Figure 3 This is an enlarged view of part A of the present invention; Figure 4 This is a schematic diagram of the structure of the mother needle in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the mother needle in an embodiment of the present invention; Figure 6 This is a structural block diagram of a quick-connect flange connector for high-frequency sealing environments according to an embodiment of the present invention; In the diagram: 1. Flange terminal, 2. Fixing bolt, 3. Cavity, 4. Microstrip line, 5. PCB board, 6. Sealed connector, 7. Female pin, 8. Inner conductor, 9. Miniature eddy current sensor, 10. Spring, 11. Open spring, 12. Independent bolt. Detailed Implementation

[0020] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate 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 is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0023] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Please see Figures 1-6 As shown, Figure 1 This is a schematic diagram of the quick-connect flange connector for high-frequency sealing environments according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the flange terminal and sealing connector according to an embodiment of the present invention; Figure 3 This is an enlarged view of part A of the present invention; Figure 4 This is a schematic diagram of the structure of the mother needle in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the mother needle in an embodiment of the present invention; Figure 6 This is a structural block diagram of a quick-connect flange connector for high-frequency sealing environments according to an embodiment of the present invention.

[0025] This invention provides a quick-connect flange connector for high-frequency sealing environments, comprising: The cavity 3 includes a PCB board 5 with microstrip lines 4 printed on it, which is fixedly disposed in the middle position of the cavity 3; An external connection mechanism includes a plurality of flange terminals 1 arranged symmetrically on both sides of the cavity 3 for connection with other equipment, wherein the flange terminals 1 are connected to the cavity 3 by fixing bolts 2; The signal transmission mechanism includes a plurality of female pins 7 fixedly and symmetrically disposed at the central axis position of the flange terminal 1, an inner conductor 8 inserted into the female pins 7, and a sealed connector 6 fixedly connected to the inner conductor 8. The sealed connector 6 is surface-mount connected to the cavity 3 through the inner conductor 8 and the microstrip line 4. The mother needle 7 is a split spring structure, with an open spring 11 between two adjacent springs 10, and the open spring 11 and the spring 10 are connected by an independent bolt 12. The signal acquisition module includes a micro strain gauge array attached to the back of the reed 10 to acquire the insertion force during the insertion process of the inner conductor 8 and the mother needle 7, a number of micro eddy current sensors 9 uniformly arranged circumferentially inside the cavity 3, and a number of micro eddy current sensors 9 arranged at the fixed end of the mother needle 7 to detect the movement trajectory of the inner conductor 8. An insertion force monitoring module is used to construct an insertion force time-domain curve of the insertion process based on the monitoring results of the micro strain gauge array, and to determine whether the spring 10 has experienced stress relaxation based on the comparison results of the fluctuation characteristic parameters of the fluctuation amplitude in the insertion force time-domain curve and preset characteristic parameters. The trajectory tracking module is used to determine whether the reed 10 is locally or entirely relaxed based on the trajectory fitting index of the movement trajectory under the condition that the reed 10 is under stress relaxation. The torque adjustment module, in response to the determination that the spring 10 is generally relaxed, calculates the preload compensation value based on the average insertion force to determine the incremental torque of the open spring 11, or in response to the determination that the spring 10 is partially relaxed, determines the incremental torque of the open spring 11 based on the radial offset of the spring 10, and optimizes the incremental torque based on the balance index of the contact pressure of the spring 10. The loss monitoring module is used to determine whether the contact state between the female pin 7 and the inner conductor 8 is qualified based on the signal transmission loss of the flange connector, and to optimize the preset characteristic parameters based on the judgment result that the contact state between the female pin 7 and the inner conductor 8 is unqualified.

[0026] Specifically, the sealing connector 6 is a glass-sintered sealing connector, which is fixedly installed inside the module cavity 3 by welding. Due to the welding, the molten solder fills the gap between the glass-sintered sealing connector and the module cavity 3, creating a seal. The flange terminal 1 and the glass-sintered sealing connector can be connected and mated via the female pin 7 and the inner conductor 8. If the flange terminal 1 suffers from poor electrical performance due to repeated insertions and removals, it can be directly replaced without damaging the seal of the module cavity 3 or impacting high-pressure environments.

[0027] Specifically, the insertion force monitoring module determines the coefficient of variation of the amplitude increment of two adjacent fluctuations in the insertion force time-domain curve as the fluctuation characteristic parameter, wherein the fluctuation amplitude refers to the difference between the peak and trough values ​​of a single fluctuation cycle.

[0028] Specifically, the insertion force monitoring module determines that the reed 10 has experienced stress relaxation based on the comparison result of the fluctuation characteristic parameter being greater than the preset characteristic parameter; The insertion force monitoring module determines that the reed 10 has not experienced stress relaxation based on the comparison result that the fluctuation characteristic parameter is less than or equal to the preset characteristic parameter.

[0029] Specifically, the preset feature parameter is set to a value range of [0.06, 0.08], and preferably 0.07 in this embodiment of the invention.

[0030] It is understandable that the spring 10 of the mother needle 7 applies stable contact pressure to the inner conductor 8 through elastic deformation. After the spring 10 is subjected to force for a long time or undergoes insertion and extraction cycles, its elasticity decays and its elastic modulus gradually decreases. Moreover, this decay is gradual and uneven. It is neither a sudden break nor a uniform linear decay, but is accompanied by local elastic fluctuations. For example, if the decay rate of some spring 10 segments is inconsistent, or if the elastic recovery ability of the same spring 10 fluctuates in different insertion and extraction cycles, the unstable elastic decay will directly cause the radial resistance fluctuation of the spring 10 to the inner conductor 8 to change from stable and controllable to random and uneven, which is reflected in the increase of the fluctuation amplitude of the insertion force. When the reed 10 is stress-free and relaxed, its elasticity and contact surface state are stable. The fluctuation of the insertion force exhibits consistent increments, with uniform amplitude increments. During each insertion and extraction, the amplitude change between two adjacent fluctuation cycles is very small. For example, the amplitude of the first fluctuation is 0.2N, the second is 0.21N, the third is 0.19N, and the fourth is 0.20N, with adjacent amplitude increments of +0.01N, -0.02N, and +0.01N respectively. The difference in increments is extremely small, meaning the fluctuation characteristic parameter is very small. When the reed 10 experiences stress relaxation, its unstable elastic decay disrupts the consistency of increments, leading to an increase in the coefficient of variation. Elastic decay causes incremental fluctuations, and the relaxed reed 10... The elastic recovery capability varies in different insertion and removal cycles. For example, in a certain cycle, due to insufficient elastic rebound, the fluctuation amplitude suddenly drops from 0.2N to 0.15N, an increment of -0.05N. In the next cycle, due to local elastic fluctuation, the amplitude jumps to 0.22N, an increment of +0.07N. The difference between adjacent increments becomes significantly larger. If it is a local relaxation due to the elastic decay of a certain leaf spring 10, the fluctuation amplitude will fluctuate due to uneven resistance when the inner conductor 8 is inserted. For example, in some fluctuations, the amplitude decreases due to the sudden drop in resistance of the relaxed leaf. In subsequent fluctuations, the amplitude suddenly increases due to the temporary uneven force on other leaves. The dispersion of adjacent increments further expands, resulting in a larger fluctuation characteristic parameter. If the fluctuation amplitude increases due to a single misalignment of the insertion pin, this interference is one-off and will only cause an abnormality in a single increment, without causing an overall increase in the coefficient of variation of multiple consecutive adjacent increments. If the fluctuation is abnormal due to foreign objects on the contact surface, the increment will return to stability after the foreign objects are removed, and the coefficient of variation will also return to normal. However, stress relaxation is gradual and continuous, which will cause the dispersion of all adjacent increments to increase continuously, and the coefficient of variation will exceed the preset threshold for a long time. This is a unique characteristic of the relaxation state and the core reason why this parameter can determine relaxation.

[0031] Specifically, the trajectory tracking module uses a micro eddy current sensor 9 to collect the axial depth and corresponding radial coordinates of the inner conductor 8 and the female needle 7 during the insertion process in real time, thereby obtaining the movement trajectory of the inner conductor 8. The movement trajectory is aligned with the central axis of the female needle 7 with the initial insertion end of the inner conductor 8 as the reference point, and the standard deviation of the radial distance from the movement trajectory to the central axis of the female needle 7 is determined as the trajectory fitting index.

[0032] Specifically, the trajectory tracking module determines that the reed 10 is slack based on the comparison result that the trajectory fitting index is less than or equal to a preset fitting index; The trajectory tracking module determines that the reed 10 has localized relaxation based on the comparison result that the trajectory fitting index is greater than the preset fitting index.

[0033] Specifically, the preset fitting index is set to a range of [0.004mm, 0.007mm], and preferably 0.005mm in this embodiment of the invention.

[0034] Understandably, overall relaxation refers to the elasticity of all the springs 10 of the mother needle 7 decreasing, with only minor differences in local strength. Local relaxation refers to the elasticity of only one or a few springs 10 decreasing, creating a significant difference from the others. When the springs 10 are relaxed overall, the circumferential resistance decreases but remains balanced. The inner conductor 8 will not shift to any side during insertion, and the radial distance of the trajectory remains stable and parallel to the central axis of the mother needle 7, resulting in a low trajectory fitting index. When the springs 10 are locally relaxed, weak areas of circumferential resistance appear. When the inner conductor 8 is inserted, it will naturally shift towards the side with less resistance, and the shift will gradually increase with the increase in insertion depth. The radial distance becomes chaotic, and the radial distance from the trajectory point to the axis fluctuates irregularly with a very high degree of dispersion, resulting in a large trajectory fitting index.

[0035] Specifically, under the condition that the reed 10 is generally relaxed, the torque adjustment module calculates the preload compensation value based on the average insertion force to determine the incremental torque of the open spring 11.

[0036] In implementation, the difference between the average insertion force and the target average insertion force is used to obtain the average insertion force difference, which is the total preload compensation value. The longitudinal preload compensation value is divided by the number of petals of the spring 10 to obtain the single petal preload compensation value. The single petal preload compensation value is divided by the stiffness coefficient of the open spring 11 to obtain the single petal displacement that the single petal spring needs to compress additionally. The product of the single petal displacement and the pre-calibrated torque-displacement conversion coefficient is the incremental torque. The torque adjustment module applies the incremental torque to the open springs 11 between all petals based on the incremental torque. The target average insertion force refers to the average insertion force of the flange connector without slack under standard working conditions.

[0037] Specifically, the torque adjustment module determines the incremental torque of the open spring 11 based on the radial offset of the reed 10 when the reed 10 is partially slack.

[0038] In implementation, the torque adjustment module first obtains radial offset data during the insertion process of the inner conductor 8 and the female pin 7 from the trajectory tracking module. By analyzing the direction of the radial offset, it determines the spring 10 that has become loose. The inner conductor 8 will shift towards the side of the loosened spring 10 with diminished elasticity. Therefore, the direction of the radial offset is the female pin position spring where the loosened spring 10 is located. At the same time, it calculates the difference between the actual radial offset and the allowable radial offset in this direction to obtain the radial offset difference. The radial offset difference is multiplied by the stiffness coefficient of the spring 10 to obtain the single-petal preload compensation value. The single-petal preload compensation value is divided by the open spring 11. The stiffness coefficient yields the additional single-lobe displacement required for the open spring 11 corresponding to the relaxed spring 10. The product of the single-lobe displacement and the pre-calibrated torque is the incremental torque of the open spring 11 corresponding to the relaxed spring 10. The torque adjustment module applies the incremental torque only to the open spring 11 corresponding to the relaxed spring 10 based on the incremental torque, without adjusting the open springs 11 at other lobe positions. Here, the allowable radial offset refers to the maximum radial offset of the inner conductor 8 movement trajectory of the flange connector without relaxation under standard operating conditions, and the torque-displacement conversion coefficient refers to the spring compression corresponding to each 1 N·m increase in torque.

[0039] Specifically, the torque adjustment module sets several torque adjustment coefficients based on the comparison results of the balance index and the preset index to adjust the incremental torque.

[0040] Specifically, the torque adjustment module determines to increase the incremental torque by a first torque adjustment coefficient based on the comparison result that the balance index is greater than the first preset index; The torque adjustment module determines not to correct the incremental torque based on the comparison result that the balance index is less than or equal to the first preset index and greater than or equal to the second preset index. The torque adjustment module determines to reduce the incremental torque by a second torque adjustment coefficient based on the comparison result that the balance index is less than the second preset index.

[0041] Specifically, the equilibrium index refers to the relative difference between the contact pressure of the stress-relaxed reed 10 on the inner conductor 8 after torque adjustment and the average contact pressure of the stress-relaxed reed 10 on the inner conductor 8.

[0042] Specifically, the first preset index is 5%, and the second preset index is -5%; the value range of the first torque adjustment coefficient is set to [1.03, 1.06], preferably 1.05 in this embodiment of the invention; the value range of the second torque adjustment coefficient is set to [0.95, 0.97], preferably 0.96 in this embodiment of the invention.

[0043] In practice, the torque adjustment coefficient is optimized for incremental torque. After adjusting the spring torque with the calculated incremental torque, if further optimization is needed, the adjusted torque is increased / decreased by the difference between the product of the incremental torque and the corresponding torque adjustment coefficient and the incremental torque.

[0044] Understandably, the calculation of incremental torque relies on multiple pre-calibrated parameters. However, these parameters may deviate from their calibration values ​​due to changes in environment and usage conditions during actual operation, leading to inaccurate calculation results. For example, the torque-displacement conversion coefficient was measured in a standard environment of 25°C under conditions of new, unworn springs during calibration. However, during actual adjustment, if the ambient temperature rises to 40°C, the spring's thermal expansion and contraction may cause a slight change in stiffness, or slight wear may increase the coefficient of friction. In this case, the actual compression displacement of the spring under the same torque will be less than the theoretical value. If the adjustment is based on the theoretical incremental torque, the actual compression of the spring 10, which has experienced stress relaxation, will be insufficient, and the contact pressure will not be adequately compensated, requiring an increase in torque correction. Conversely, if the spring experiences slight pre-compression due to long-term storage, the compression under the same torque may exceed the theoretical value, resulting in excessive pressure compensation, requiring a decrease in torque correction.

[0045] Specifically, the loss monitoring module determines that the contact state between the mother needle 7 and the inner conductor 8 is qualified based on the comparison result that the signal transmission loss is less than or equal to the preset loss. The loss monitoring module determines that the contact state between the mother needle 7 and the inner conductor 8 is unqualified based on the comparison result that the signal transmission loss is greater than the preset loss.

[0046] Specifically, the signal transmission loss of the flange connector is determined using a vector network analyzer, and the preset loss range is set to [0.2dB, 0.5dB], with 0.3dB being preferred in this embodiment of the invention.

[0047] It is understandable that the contact state between the female pin 7 and the inner conductor 8 directly determines the magnitude of the contact resistance, which is a key source of signal transmission loss. When the contact between the female pin 7 and the inner conductor 8 is qualified, such as when the spring 10 is not loose and the contact surface is clean, the two can form a tight and stable physical contact. The contact resistance is usually controlled in the milliohm range, and the energy loss during signal transmission is mainly due to the inherent loss of the wire itself, resulting in low and stable overall loss. However, when the contact state is unqualified, such as when the spring 10 is loose and the contact pressure is insufficient, the effective contact area of ​​the physical contact decreases, and the contact resistance increases significantly. The additional resistance heat loss will consume signal energy. At the same time, the increased resistance will also cause impedance mismatch at the contact interface, triggering signal reflection and further aggravating transmission loss. Therefore, the magnitude of signal transmission loss can directly reflect the quality of the contact state.

[0048] Specifically, when the loss monitoring module determines that the contact state between the mother needle 7 and the inner conductor 8 is unqualified, it determines to reduce the preset characteristic parameter by adjusting the first parameter coefficient based on the comparison result that the difference between the signal transmission loss and the preset loss is greater than the preset difference. The loss monitoring module determines to reduce the preset characteristic parameter by adjusting the second parameter coefficient based on the comparison result that the loss difference is less than or equal to the preset difference.

[0049] Specifically, the preset difference range is set to [0.1dB, 0.3dB], and in this embodiment of the invention, 0.2dB is preferred.

[0050] Understandably, the core issue of substandard contact is the decreased contact stability of the spring 10 between the inner conductor 8 and the female needle 7. This instability is directly reflected in the insertion force time-domain curve, creating additional fluctuations not caused by relaxation. For example, when the contact pressure is insufficient, intermittent loose connections may occur during the insertion of the inner conductor 8, causing the amplitude increment of the insertion force fluctuation to become more discrete. The preset characteristic parameters are set based on an ideal scenario where the contact condition is acceptable and there is no additional interference. When substandard contact introduces interference, even if the spring 10 does not show significant relaxation, fluctuations in the insertion force signal may cause the actual characteristic parameters to exceed the original preset threshold, leading to a misjudgment of spring 10 relaxation. Conversely, if the spring 10 is slightly relaxed, but the interference from unstable contact masks the fluctuations caused by relaxation, the actual characteristic parameters may fall below the original preset threshold, leading to a missed judgment of spring 10 relaxation. In this case, the preset characteristic parameters must be adjusted to adapt the judgment criteria to the interference signal environment. When the loss difference is greater than the preset difference, it indicates that the interference of the insertion force signal is stronger. If the contact is frequently loose, the preset characteristic parameter needs to be reduced by the first coefficient with a larger adjustment range to avoid false high parameters caused by interference being misjudged as relaxation. When the loss difference is less than or equal to the preset difference, it indicates that the interference is weaker. The preset characteristic parameter needs to be reduced by the second coefficient with a smaller adjustment range to eliminate slight interference and avoid over-adjustment that would reduce the sensitivity to true relaxation.

[0051] The technical solution of the present invention has been described above with reference to 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 can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A quick-connect flange connector for high-frequency sealing environments, characterized in that, include: cavity; An external connection mechanism, comprising a plurality of flange terminals symmetrically arranged on both sides of the cavity; A signal transmission mechanism, comprising a plurality of female pins symmetrically arranged at the central axis position of the flange terminal, and an inner conductor inserted into the female pins; The signal acquisition module includes a micro strain gauge array for acquiring the insertion force during the insertion process of the inner conductor and the female pin, and several micro eddy current sensors for detecting the movement trajectory of the inner conductor. The insertion force monitoring module is used to construct the insertion force time-domain curve of the insertion process based on the monitoring results of the micro strain gauge array, and to determine whether the spring of the mother needle has stress relaxation based on the comparison result of the fluctuation characteristic parameter of the fluctuation amplitude in the insertion force time-domain curve and the preset characteristic parameter. The trajectory tracking module is used to determine whether the reed is locally or entirely relaxed based on the trajectory fitting index of the movement trajectory under the condition that the reed is under stress relaxation. The torque adjustment module, in response to the determination that the reed has a local slack, determines the incremental torque of the open spring based on the radial offset of the reed, and optimizes the incremental torque based on the balance index of the contact pressure of the reed. The loss monitoring module is used to determine whether the contact state between the female pin and the inner conductor is qualified based on the signal transmission loss of the flange connector, and to optimize the preset characteristic parameters based on the judgment result that the contact state between the female pin and the inner conductor is unqualified.

2. The quick-connect flange connector for high-frequency sealing environments according to claim 1, characterized in that, The mother needle has a split spring structure, with an open spring between two adjacent spring segments. The open spring and the spring segments are connected by independent bolts.

3. The quick-connect flange connector for high-frequency sealing environments according to claim 1, characterized in that, The insertion force monitoring module determines the coefficient of variation of the amplitude increment of two adjacent fluctuation amplitudes in the insertion force time domain curve as the fluctuation characteristic parameter, wherein the fluctuation amplitude refers to the difference between the peak and trough values ​​of a single fluctuation cycle.

4. The quick-connect flange connector for high-frequency sealing environments according to claim 3, characterized in that, The insertion force monitoring module determines that the reed has experienced stress relaxation based on the comparison result of the fluctuation characteristic parameter being greater than the preset characteristic parameter.

5. The quick-connect flange connector for high-frequency sealing environments according to claim 4, characterized in that, The trajectory tracking module aligns the movement trajectory of the inner conductor with the central axis of the mother needle, using the initial insertion end of the inner conductor as a reference point, and determines the standard deviation of the radial distance from the movement trajectory to the central axis of the mother needle as the trajectory fitting index.

6. The quick-connect flange connector for high-frequency sealing environments according to claim 5, characterized in that, The trajectory tracking module determines that the spring is loose based on the comparison result of the trajectory fitting index being less than or equal to the preset fitting index. The torque adjustment module calculates the preload compensation value based on the average insertion force to determine the incremental torque of the open spring.

7. The quick-connect flange connector for high-frequency sealing environments according to claim 6, characterized in that, The trajectory tracking module determines that the reed is locally slack based on the comparison result that the trajectory fitting index is greater than the preset fitting index, and the torque adjustment module determines the incremental torque of the open spring based on the radial offset of the reed.

8. The quick-connect flange connector for high-frequency sealing environments according to claim 7, characterized in that, The torque adjustment module determines to increase the incremental torque by a first torque adjustment coefficient based on the comparison result that the balance index is greater than the first preset index. The torque adjustment module determines to reduce the incremental torque by a second torque adjustment coefficient based on the comparison result that the balance index is less than the second preset index.

9. The quick-connect flange connector for high-frequency sealing environments according to claim 8, characterized in that, The loss monitoring module determines that the contact state between the mother needle and the inner conductor is unqualified based on the comparison result that the signal transmission loss is greater than the preset loss.

10. The quick-connect flange connector for high-frequency sealing environments according to claim 9, characterized in that, When the loss monitoring module determines that the contact state between the mother needle and the inner conductor is unqualified, it determines to reduce the preset characteristic parameter by adjusting the first parameter coefficient based on the comparison result that the difference between the signal transmission loss and the preset loss is greater than the preset difference. The loss monitoring module determines to reduce the preset characteristic parameter by adjusting the second parameter coefficient based on the comparison result that the loss difference is less than or equal to the preset difference.

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