A quick flange connector for high frequency sealed environments

Abstract

The present application relates to the technical field of flange connector, especially to a quick plug-in flange connector for high-frequency sealed environment, comprising: a cavity; an external connection mechanism comprising a plurality of flange terminals; a signal transmission mechanism comprising a plurality of female pins, an inner conductor inserted with the female pins; a signal acquisition module comprising a micro strain gauge array and a plurality of micro eddy current sensors; an insertion force monitoring module for determining whether the spring leaf of the female pin appears stress relaxation based on fluctuation characteristic parameters; a trajectory tracking module for determining whether the spring leaf appears local relaxation or overall relaxation based on trajectory fitting indexes; a torque adjustment module for determining the incremental torque of the open spring based on the radial offset of the spring leaf and optimizing the incremental torque; a loss monitoring module for determining whether the contact state of the female pin and the inner conductor is qualified based on signal transmission loss, so as to optimize the preset characteristic parameters. The present application improves the signal transmission stability of the flange connector.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flange connector, in particular to a quick plug-in flange connector for high-frequency sealed environment. BACKGROUND

[0002] In the fields of 5G communication, satellite remote sensing, industrial automation and aerospace, stable transmission of high-frequency signals covering 1GHz to 60GHz frequency bands is the core guarantee of device performance. A large number of devices in these scenarios need to work in outdoor, humid, dusty or corrosive environments with strict sealing requirements for a long time. At the same time, in order to adapt to the operation and maintenance needs of device rapid maintenance and module replacement, there is an urgent need for high-frequency low-loss, reliable sealing and quick plugging of the connector. The traditional flange connector has significant technical shortcomings: on the one hand, most products have not optimized the impedance matching structure for high-frequency signals, and signal reflection is enhanced and insertion loss is out of standard in GHz and above frequency bands, which is difficult to meet the transmission efficiency requirements of high-frequency communication; on the other hand, the traditional sealed flange relies on multiple bolt fastening to achieve sealing, which not only has a complicated and time-consuming disassembly and assembly process, but also the bolt torque is prone to decay and the sealing element is prone to aging during long-term use, resulting in a decline in sealing performance and the invasion of external water vapor and impurities, which further aggravates signal loss and even damages the internal structure; in addition, although some quick plug-in connectors can simplify the plugging operation, their sealing reliability and high-frequency transmission performance are difficult to balance, and they cannot adapt to high-frequency signal transmission scenarios in sealed environments.

[0003] Chinese patent application publication No. CN102148455A discloses a rotatable connector installed with a flange panel, which can reduce the space precision requirement of product use without changing the original product use, facilitate normal use of the product in some space environment that is not easy to control, and rotate at any angle. The invention includes a shell, which is arranged on a flange plate, and a contact head arranged on one side of the shell. A spring is arranged between the shell and the contact head. The contact head is provided with a jack on one side. An insulator I is fixedly connected with the contact head. An insulator II is arranged in the shell. A bushing is arranged between the shell and the insulator II. A conductive sealing ring is arranged at the butt joint of the shell and the panel.

[0004] The existing technology has the following problems: when using a flange connector for high-frequency signal transmission, the female needle spring sheet will be stressed relaxed due to long-term plugging fatigue, environmental temperature cycle or vibration impact, which will directly lead to the decrease of its elasticity and the pressure of the opposite contact inner conductor, and further lead to signal distortion, high error rate and even transmission interruption, thereby reducing the signal transmission stability of the flange connector. SUMMARY

[0005] To this end, the application provides a quick-plug flange connector for a high-frequency sealed environment to overcome the problem that stress relaxation of female needle spring blades in the prior art due to long-term plug-in fatigue, environmental temperature cycling or vibration impact directly leads to elastic attenuation, significant reduction of pressure on the inner conductor in contact, and further leads to signal distortion, increased bit error rate and even transmission interruption, thereby reducing the signal transmission stability of the flange connector.

[0006] To achieve the above-mentioned purpose, the application provides a quick-plug flange connector for a high-frequency sealed environment, comprising:

[0007] a cavity;

[0008] an external connection mechanism comprising a plurality of flange terminals symmetrically arranged on both sides of the cavity;

[0009] a signal transmission mechanism comprising a plurality of female needles symmetrically arranged at the center axis position of the flange terminals, and an inner conductor inserted with the female needles;

[0010] a signal acquisition module comprising a micro-strain gauge array for acquiring the insertion force during the insertion process of the inner conductor and the female needle, and a plurality of micro-electric eddy current sensors for detecting the movement trajectory of the inner conductor;

[0011] an insertion force monitoring module for constructing an insertion force time domain curve of the insertion process based on the monitoring results of the micro-strain gauge array, and determining whether the spring blade of the female needle has stress relaxation based on the comparison result of the fluctuation characteristic parameters in the insertion force time domain curve and the preset characteristic parameters;

[0012] a trajectory tracking module for determining whether the spring blade has local relaxation or overall relaxation based on the trajectory fitting index of the movement trajectory under the condition that the spring blade has stress relaxation;

[0013] a torque adjustment module for determining the incremental torque of the open spring based on the radial offset of the spring blade in response to the determination result that the spring blade has local relaxation, and optimizing the incremental torque based on the equalization index of the contact pressure of the spring blade;

[0014] a loss monitoring module for determining whether the contact state of the female needle and the inner conductor is qualified based on the signal transmission loss of the flange connector, and optimizing the preset characteristic parameters based on the determination result that the contact state of the female needle and the inner conductor is unqualified.

[0015] Further, the female needle is a split spring structure, and an open spring is arranged between the two adjacent split spring blades, and the open spring and the spring blade are connected by independent bolts.

[0016] Further, the insertion force monitoring module determines a variation coefficient of amplitude increments of adjacent two fluctuation amplitudes in the insertion force time domain curve as a fluctuation characteristic parameter, wherein the fluctuation amplitude refers to a difference between a peak value and a valley value of a single fluctuation period.

[0017] Further, the insertion force monitoring module determines that the spring reed appears stress relaxation based on a comparison result that the fluctuation characteristic parameter is greater than a preset characteristic parameter.

[0018] Further, the trajectory tracking module aligns a moving trajectory of the inner conductor with a center axis of the female needle with the inner conductor insertion initial end as a reference point, and determines a radial distance standard deviation of the moving trajectory to the center axis of the female needle as a trajectory fitting index.

[0019] Further, the trajectory tracking module determines that the spring reed appears overall relaxation based on a comparison result that the trajectory fitting index is less than or equal to a preset fitting index, and the torque adjusting module calculates a pre-tightening force compensation value based on the insertion force mean value to determine an incremental torque of the open spring.

[0020] Further, the trajectory tracking module determines that the spring reed appears local relaxation based on a comparison result that the trajectory fitting index is greater than the preset fitting index, and the torque adjusting module determines the incremental torque of the open spring based on a radial offset of the spring reed.

[0021] Further, the torque adjusting module determines to increase the incremental torque by a first torque adjusting coefficient based on a comparison result that the balance index is greater than a first preset index.

[0022] The torque adjusting module determines to decrease the incremental torque by a second torque adjusting coefficient based on a comparison result that the balance index is less than a second preset index.

[0023] Further, the loss monitoring module determines that a contact state of the female needle and the inner conductor is unqualified based on a comparison result that the signal transmission loss is greater than a preset loss.

[0024] Further, the loss monitoring module determines to decrease the preset characteristic parameter by a first parameter adjusting coefficient based on a comparison result that a loss difference value between the signal transmission loss and the preset loss is greater than a preset difference value, under the condition that the contact state of the female needle and the inner conductor is unqualified.

[0025] The loss monitoring module determines to decrease the preset characteristic parameter by a second parameter adjusting coefficient based on a comparison result that the loss difference value is less than or equal to the preset difference value.

[0026] Compared with the prior art, the beneficial effects of the present application are that the present application collects the insertion force of the inner conductor and the female needle plug-in process by a micro strain gauge array, constructs the insertion force time domain curve in combination with the insertion force monitoring module, and takes the variation coefficient of the amplitude increment of the adjacent two fluctuation amplitudes as the fluctuation characteristic parameter to realize the accurate determination of the spring piece stress relaxation of the female needle, and avoid the high-frequency signal transmission failure caused by relaxation from the source. The female needle spring piece is a key contact component for high-frequency signal transmission, and its elastic stability directly determines the contact resistance and signal loss. The core principle of the determination logic is that when there is no relaxation, the spring piece is elastic and stable, the contact surface state is uniform, the insertion force fluctuation amplitude increment has consistency, and the variation coefficient is small. If the spring piece appears relaxation, the elastic attenuation will break the increment consistency, or the amplitude increment dispersion will increase due to overall relaxation, or the amplitude will be large and small due to local relaxation, and finally the variation coefficient will be large. The traditional connector lacks real-time relaxation monitoring, and is easy to cause the contact resistance to rise from milliohm to tens of milliohm due to relaxation, and to cause high-frequency signal reflection enhancement and insertion loss exceeding the standard. Through the monitoring mechanism of the present application, the problem can be identified in the early stage of relaxation, the risks such as signal distortion and error rate increase are avoided, single skewness and temporary foreign matter interference are excluded, the determination accuracy is ensured, and the stability of signal transmission in a high-frequency sealed environment is improved.

[0027] Further, through the cooperation of the trajectory tracking module and the torque adjusting module, the present application realizes accurate differentiation of relaxation types and targeted compensation of pre-tightening force, effectively restores the spring piece contact pressure, and prolongs the service life of the connector. The trajectory tracking module differentiates the relaxation types based on the moving trajectory collected by the micro eddy current sensor, and takes the radial distance standard deviation as the trajectory fitting index. When there is overall relaxation, the elasticity of all spring pieces uniformly decays, the inner conductor trajectory is parallel to the female needle axis, and the standard deviation is small. When there is local relaxation, the elasticity of single / multi-petal spring pieces is weak, the inner conductor deviates to the relaxed petal, the trajectory radial distance fluctuates irregularly, and the standard deviation is large. The torque adjusting module compensates accordingly: when there is overall relaxation, all open springs are adjusted synchronously; when there is local relaxation, only the relaxed petal spring is adjusted, and the torque is optimized through the contact pressure balance index. After compensation, the contact pressure of each petal is restored, and damage to the spring structure caused by excessive adjustment is avoided, thereby further improving the stability of signal transmission in a high-frequency sealed environment.

[0028] Further, the application optimizes preset characteristic parameters through a loss monitoring module, and combines glass sintering sealing and replaceable flange terminal design, giving consideration to high-frequency transmission performance, sealing reliability and operation and maintenance convenience. The loss monitoring module determines the contact state based on signal transmission loss measured by a vector network analyzer, and adjusts preset characteristic parameters according to loss difference under the condition that the contact state is determined to be unqualified, so as to avoid loose misjudgment / omission caused by interference. Meanwhile, the glass sintering sealing connector realizes IP68 level sealing through welding, and can resist water vapor and dust invasion in a high-frequency sealing environment; the flange terminal can be replaced alone, solving the pain point that the traditional connector terminal needs to be replaced as a whole, and reducing operation and maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 FIG. 1 is a structural schematic diagram of a high-frequency sealing environment fast-plug flange connector according to an embodiment of the application;

[0030] Figure 2 FIG. 2 is a structural schematic diagram of a flange terminal and a sealing connector according to an embodiment of the application;

[0031] Figure 3 FIG. 3 is an enlarged view of part A according to an embodiment of the application;

[0032] Figure 4 FIG. 4 is a structural schematic diagram of a female needle according to an embodiment of the application;

[0033] Figure 5 FIG. 5 is a sectional view of the female needle according to an embodiment of the application;

[0034] Figure 6 FIG. 6 is a structural block diagram of a high-frequency sealing environment fast-plug flange connector according to an embodiment of the application;

[0035] In the figure: 1, flange terminal; 2, fixing bolt; 3, cavity; 4, microstrip line; 5, PCB board; 6, sealing connector; 7, female needle; 8, inner conductor; 9, micro eddy current sensor; 10, reed; 11, open spring; 12, independent bolt. DETAILED DESCRIPTION

[0036] In order to make the purpose and advantages of the application more clear and explicit, the application is further described below in combination with embodiments; it should be understood that the specific embodiments described herein are only used to explain the application, and do not limit the protection scope of the application.

[0037] The preferred embodiments of the application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the application, and are not intended to limit the protection scope of the application.

[0038] It should be noted that in the description of the present application, the terms of direction or position relationship such as "upper", "lower", "left", "right", "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Please refer to Figures 1-6 shown, Figure 1 is a structural schematic view of a quick-plug flange connector for a high-frequency sealed environment according to an embodiment of the present application; Figure 2 is a structural schematic view of a flange terminal and a sealing connector according to an embodiment of the present application; Figure 3 is an enlarged view of part A according to an embodiment of the present application; Figure 4 is a structural schematic view of a female needle according to an embodiment of the present application; Figure 5 is a sectional view of a female needle according to an embodiment of the present application; Figure 6 is a structural block diagram of a quick-plug flange connector for a high-frequency sealed environment according to an embodiment of the present application.

[0041] The quick-plug flange connector for a high-frequency sealed environment according to an embodiment of the present application comprises:

[0042] a cavity 3 comprising a PCB board 5 with a microstrip line 4 printed and fixedly arranged at a middle position of the cavity 3;

[0043] an external connecting mechanism comprising a plurality of flange terminals 1 arranged axially symmetrically on both sides of the cavity 3 for connecting with other devices, the flange terminals 1 being connected with the cavity 3 through fixing bolts 2;

[0044] a signal transmission mechanism comprising a plurality of female needles 7 arranged axially symmetrically and fixedly at the central axis positions of the flange terminals 1, an inner conductor 8 plugged with the female needles 7, and a sealing connector 6 fixedly connected with the inner conductor 8, the sealing connector 6 being connected with the cavity 3 through surface attachment of the inner conductor 8 and the microstrip line 4,

[0045] The female needle 7 is a split spring structure, and an open spring 11 is arranged between two adjacent split springs 10. The open spring 11 and the spring 10 are connected by an independent bolt 12.

[0046] The signal acquisition module includes a micro strain gauge array attached to the back of the spring 10 to acquire the insertion force during the insertion process of the inner conductor 8 and the female needle 7, a plurality of micro eddy current sensors 9 arranged uniformly in the circumferential direction inside the cavity 3 and arranged at the fixed end of the female needle 7 to detect the movement trajectory of the inner conductor 8.

[0047] The 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 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.

[0048] The trajectory tracking module is used to determine whether the spring 10 has local relaxation or overall relaxation based on the trajectory fitting index of the movement trajectory under the condition that the spring 10 has stress relaxation.

[0049] The torque adjustment module calculates a pretightening force compensation value based on the average insertion force to determine the incremental torque of the open spring 11 in response to the determination result that the spring 10 has overall relaxation, or determines the incremental torque of the open spring 11 based on the radial offset of the spring 10 in response to the determination result that the spring 10 has local relaxation, and optimizes the incremental torque based on the equalization index of the contact pressure of the spring 10.

[0050] The loss monitoring module is used to determine whether the contact state of the female needle 7 and the inner conductor 8 is qualified based on the signal transmission loss of the flange connector, and to optimize the preset characteristic parameter based on the determination result that the contact state of the female needle 7 and the inner conductor 8 is unqualified.

[0051] Specifically, the sealed connector 6 is a glass sintering sealed connector, which is fixedly installed in the module cavity 3 by welding. The glass sintering sealed connector and the module cavity 3 are sealed by tin liquid filling the gap between them due to welding. The flange terminal 1 and the glass sintering sealed connector can be interconnected by the female needle 7 and the inner conductor 8. If the flange terminal 1 has poor electrical performance due to a large number of insertion and extraction, the flange terminal 1 can be directly replaced without damaging the sealing or high-pressure environment of the module cavity 3.

[0052] Specifically, the insertion force monitoring module determines the coefficient of variation of the amplitude increment of adjacent two 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 value and the valley value of a single fluctuation period.

[0053] Specifically, the insertion force monitoring module determines that the reed 10 appears stress relaxation based on a comparison result that the fluctuation characteristic parameter is greater than the preset characteristic parameter.

[0054] The insertion force monitoring module determines that the reed 10 does not appear stress relaxation based on a comparison result that the fluctuation characteristic parameter is less than or equal to the preset characteristic parameter.

[0055] Specifically, the preset characteristic parameter is set to a value range of [0.06, 0.08], and the embodiment of the application preferably 0.07.

[0056] It can be understood that the spring leaf 10 of the female needle 7 exerts a stable contact pressure on the inner conductor 8 through elastic deformation. After long-term stress or experiencing a plugging cycle, the elasticity of the spring leaf 10 attenuates, and the elastic modulus gradually decreases. This attenuation is gradual and uneven, neither a sudden breakage nor a uniform linear attenuation as a whole, but accompanied by local elastic fluctuations. For example, the attenuation rates of some petals of the spring leaf 10 are inconsistent, or the elastic recovery ability of the same spring leaf 10 fluctuates in different plugging cycles. Unstable elastic attenuation will directly lead to the fluctuation of the radial resistance of the spring leaf 10 to the inner conductor 8, from stable and controllable to random and uneven, and then reflected in the increasing amplitude of the insertion force. When the spring leaf 10 is stress-relaxed, its elastic stability and contact surface state are stable, and the fluctuation of the insertion force has consistent increments, and the amplitude increment is uniform. In each plugging process, the amplitude of the adjacent two fluctuation cycles changes very little. For example, the first fluctuation amplitude is 0.2N, the second is 0.21N, the third is 0.19N, and the fourth is 0.20N. The adjacent amplitude increments are +0.01N, -0.02N, and +0.01N, respectively. The difference between the increments is very small, that is, the fluctuation characteristic parameter is very small. When the spring leaf 10 is stress-relaxed, the unstable attenuation of its elasticity will break the consistency of the increments, leading to an increase in the coefficient of variation. Elastic attenuation leads to fluctuation of the increments. The elastic recovery ability of the relaxed spring leaf 10 is different in different plugging cycles. For example, in a certain cycle, due to temporary insufficient elastic rebound, the fluctuation amplitude suddenly decreases from 0.2N to 0.15N, with an increment of -0.05N. In the next cycle, due to local elastic fluctuations, the amplitude jumps to 0.22N, with an increment of +0.07N. The difference between the adjacent increments is significantly larger. If it is a local relaxation of the elastic attenuation of a petal of the spring leaf 10, the fluctuation amplitude will be large and small due to uneven resistance when the inner conductor 8 is inserted. For example, the amplitude of some fluctuations decreases due to the sudden drop in resistance of the relaxed petals, and the amplitude suddenly increases due to the temporary uneven stress of other petals. The dispersion degree of the adjacent increments is further expanded, leading to a larger fluctuation characteristic parameter. If the single deflection of the plug causes the fluctuation amplitude to increase, this interference is one-time, only one increment is abnormal, and it will not cause the overall increase of the coefficient of variation of the continuous multiple adjacent increments. If the contact surface has temporary foreign matter, the increment will return to stability after the foreign matter is removed, and the coefficient of variation will also return to normal. Stress relaxation is gradual and continuous, which will continuously increase the dispersion degree of all adjacent increments, and the coefficient of variation will also be long-term above the preset threshold. This is a unique feature of the relaxed state, and it is also the core reason why this parameter can determine the relaxation.

[0057] Specifically, the trajectory tracking module acquires the axial depth and the corresponding radial coordinates of the inner conductor 8 and the female needle 7 during the plugging process of the inner conductor 8 and the female needle 7 based on the micro electro-vortex sensor 9, obtains the movement trajectory of the inner conductor 8, aligns the movement trajectory with the central axis of the female needle 7 with the initial end of the inner conductor 8 as the reference point, and determines the radial distance standard deviation of the movement trajectory to the central axis of the female needle 7 as the trajectory fitting index.

[0058] Specifically, the trajectory tracking module determines that the spring leaf 10 appears overall relaxation based on a comparison result that the trajectory fitting index is less than or equal to a preset fitting index.

[0059] The trajectory tracking module determines that the spring leaf 10 appears local relaxation based on a comparison result that the trajectory fitting index is greater than the preset fitting index.

[0060] Specifically, the preset fitting index is set to a value range of [0.004 mm, 0.007 mm], and the embodiment of the present application preferably 0.005 mm.

[0061] It can be understood that overall relaxation refers to that the elasticity of all spring leaves 10 of the female needle 7 is attenuated, and the local relaxation refers to that only the elasticity of a few spring leaves 10 is attenuated, and there is a significant difference with the remaining petals. When the spring leaf 10 is overall relaxed, the circumferential resistance is reduced but still balanced, the inner conductor 8 does not deviate to any side during insertion, the radial distance of the trajectory remains stable, and the trajectory is still parallel to the central axis of the female needle 7, and the trajectory fitting index is small. When the spring leaf 10 is locally relaxed, the circumferential resistance appears a weak area, and the inner conductor 8 deviates to the side of the relaxed petal with small resistance during insertion, and the deviation amount gradually increases with the increase of the insertion depth, the radial distance is chaotic, the radial distance of the trajectory point to the axis presents irregular fluctuations, and the dispersion degree is extremely high, resulting in a larger trajectory fitting index.

[0062] Specifically, the torque adjustment module calculates a pre-tightening force compensation value based on the average insertion force under the condition that the spring leaf 10 appears overall relaxation, to determine the incremental torque of the open spring 11.

[0063] In implementation, the average insertion force is subtracted from the target average insertion force to obtain an average insertion force difference, that is, a total pre-tightening force compensation value, the single-petal pre-tightening force compensation value is obtained by dividing the longitudinal pre-tightening force compensation value by the number of petals of the spring leaf 10, the single-petal displacement amount that the single-petal spring needs to be additionally compressed is obtained by dividing the single-petal pre-tightening force compensation value by the stiffness coefficient of the open spring 11, and the product of the single-petal displacement amount and the pre-calibrated torque-displacement conversion coefficient is the incremental torque. The torque adjustment module applies the incremental torque to all inter-petal open springs 11 based on the incremental torque, wherein the target average insertion force refers to the average insertion force of the flange connector without relaxation under standard working conditions.

[0064] Specifically, the torque adjustment module determines the incremental torque of the open spring 11 based on the radial deviation of the spring leaf 10 under the condition that the spring leaf 10 appears local relaxation.

[0065] In implementation, the torque adjustment module first obtains the radial offset data of the inner conductor 8 during the plugging process of the female needle 7 from the trajectory tracking module, determines the relaxed spring leaf 10 by analyzing the direction of the radial offset amount, and the inner conductor 8 will offset to the side of the relaxed spring leaf 10 with elastic attenuation, so the direction of the radial offset amount is the female needle petal spring leaf where the relaxed spring leaf 10 is located; at the same time, the difference between the actual radial offset amount in the direction and the allowed radial offset amount is calculated to obtain the radial offset difference value; the radial offset difference value is multiplied by the stiffness coefficient of the spring leaf 10 to obtain the single-petal pre-tightening force compensation value, and the single-petal pre-tightening force compensation value is divided by the stiffness coefficient of the opening spring 11 to obtain the single-petal displacement amount that the relaxed spring leaf 10 corresponding opening spring 11 needs to be additionally compressed, and the product of the single-petal displacement amount and the pre-calibrated torque-displacement conversion coefficient is the incremental torque of the relaxed spring leaf 10 corresponding opening spring 11; the torque adjustment module only applies the incremental torque to the opening spring 11 corresponding to the relaxed spring leaf 10 based on the incremental torque, and does not adjust the opening spring 11 of other petal positions, wherein the allowed radial offset amount refers to the maximum radial offset amount of the inner conductor 8 moving track of the flange connector without relaxation under standard working conditions, and the torque-displacement conversion coefficient refers to the spring compression amount corresponding to each increase of 1 N·m torque.

[0066] Specifically, the torque adjustment module sets a plurality of torque adjustment coefficients based on the comparison results of the balance index and the preset index respectively to adjust the incremental torque.

[0067] 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 a first preset index.

[0068] The torque adjustment module determines not to modify 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 a second preset index.

[0069] The torque adjustment module determines to decrease 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.

[0070] Specifically, the balance index refers to the relative difference between the contact pressure of the spring leaf 10 with stress relaxation on the inner conductor 8 after torque adjustment and the average contact pressure of the spring leaf 10 without stress relaxation on the inner conductor 8.

[0071] 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], and the embodiment of the present application preferably is 1.05; the value range of the second torque adjustment coefficient is set to [0.95, 0.97], and the embodiment of the present application preferably is 0.96.

[0072] In implementation, the optimization object of the torque adjustment coefficient is the incremental torque, and after the torque of the spring is adjusted by the calculated incremental torque, if optimization is needed, the difference between the incremental torque and the product of the incremental torque and the corresponding torque adjustment coefficient is added / subtracted to the torque after adjustment.

[0073] It can be understood that the calculation of the incremental torque needs to rely on multiple parameters calibrated in advance, but these parameters will deviate from the calibrated values in actual working conditions due to changes in environment and use state, resulting in inaccurate calculation results. For example, the torque-displacement conversion coefficient is measured under the standard environment of 25°C and in the state of a new spring without wear; however, when the environment temperature rises to 40°C, the spring expands and contracts due to heat and cold, causing slight changes in the stiffness or the spring has slight wear, resulting in an increase in the friction coefficient, and the actual compression displacement of the spring under the same torque will be less than the theoretical value. At this time, the actual compression amount of the spring sheet 10 that occurs stress relaxation is insufficient, the contact pressure is not enough, and the torque needs to be increased for correction. Conversely, if the spring has slight pre-compression due to long-term storage, the compression amount under the same torque may exceed the theoretical value, resulting in excessive pressure compensation, and the torque needs to be reduced for correction.

[0074] Specifically, the loss monitoring module determines that the contact state of the female pin 7 and the inner conductor 8 is qualified based on a comparison result that the signal transmission loss is less than or equal to a preset loss.

[0075] The loss monitoring module determines that the contact state of the female pin 7 and the inner conductor 8 is unqualified based on a comparison result that the signal transmission loss is greater than the preset loss.

[0076] Specifically, the signal transmission loss of the flange connector is determined using a vector network analyzer, and the preset loss is set to a value range of [0.2 dB, 0.5 dB], and the embodiment of the present application preferably 0.3 dB.

[0077] It can be understood that the contact state of the female pin 7 and the inner conductor 8 directly determines the size of the contact resistance, and the contact resistance is a key source of signal transmission loss. When the female pin 7 and the inner conductor 8 are in contact, such as the spring sheet 10 without relaxation and the contact surface clean, they can form a tight and stable physical contact, and the contact resistance is usually controlled in the order of milliohms. The energy loss during signal transmission is mainly the inherent loss of the conductor itself, and the overall loss is low and stable. When the contact state is unqualified due to insufficient contact pressure caused by the relaxation of the spring sheet 10, the effective contact area of the physical contact is reduced, the contact resistance is significantly increased, the additional resistance heat loss consumes signal energy, and the increased resistance also causes impedance mismatch at the contact interface, causing signal reflection and further increasing transmission loss. Therefore, the size of the signal transmission loss can directly reflect the pros and cons of the contact state.

[0078] Specifically, the loss monitoring module determines to reduce the preset characteristic parameter by a first parameter adjustment coefficient based on a comparison result that the loss difference between the signal transmission loss and the preset loss is greater than a preset difference when determining that the contact state of the female needle 7 and the inner conductor 8 is unqualified.

[0079] The loss monitoring module determines to reduce the preset characteristic parameter by a second parameter adjustment coefficient based on a comparison result that the loss difference is less than or equal to the preset difference.

[0080] Specifically, the preset difference is set to [0.1dB, 0.3dB], and the embodiment of the application preferably 0.2dB.

[0081] It can be understood that the core problem of unqualified contact state is the decline of the contact stability of the inner conductor 8 and the reed 10 of the female needle 7, and this instability will directly reflect in the insertion force time domain curve, forming additional fluctuations caused by non-relaxation. For example, when the contact pressure is insufficient, intermittent virtual connection may occur during the insertion of the inner conductor 8, resulting in an increase in the fluctuation amplitude of the insertion force. The preset characteristic parameter is set based on the ideal scenario of qualified contact state and no additional interference. When the contact state is unqualified and interference is introduced, even if the reed 10 does not relax significantly, the fluctuation of the insertion force signal may cause the actual characteristic parameter to exceed the original preset threshold, resulting in a false judgment that the reed 10 is relaxed. Conversely, if the reed 10 has slightly relaxed, but the unstable contact interference masks the fluctuation caused by relaxation, the actual characteristic parameter may be lower than the original preset threshold, resulting in a missed judgment that the reed 10 is relaxed. At this time, the preset characteristic parameter must be adjusted to adapt the judgment standard to the signal environment with interference. When the loss difference is greater than the preset difference, it means that the interference of the insertion force signal is stronger, such as frequent virtual connection, and the first coefficient with a larger adjustment amplitude is needed to reduce the preset characteristic parameter to avoid false high parameter misjudgment caused by interference. When the loss difference is less than or equal to the preset difference, it means that the interference is weak, and the second coefficient with a smaller adjustment amplitude is needed to reduce the preset characteristic parameter to exclude slight interference and avoid excessive adjustment to reduce the sensitivity to real relaxation.

[0082] So far, the technical solutions of the application have been described in conjunction with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the application, and the technical solutions after these changes or replacements will fall within the protection scope of the application.

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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