CN114236237B - Single-ended phase correction method for phase matching cable assembly - Google Patents
Single-ended phase correction method for phase matching cable assembly Download PDFInfo
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- CN114236237B CN114236237B CN202111550659.0A CN202111550659A CN114236237B CN 114236237 B CN114236237 B CN 114236237B CN 202111550659 A CN202111550659 A CN 202111550659A CN 114236237 B CN114236237 B CN 114236237B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The application relates to a single-ended phase correction method for a phase-matching cable, which comprises the following steps: calculating the length delta L of the core wire to be sheared according to the tested phase difference value; carrying out wire repair treatment on the open end of the cable assembly, realizing real-time test and correction without detaching the cable assembly, and observing the phase value of the single-ended cable assembly in the vector network analyzer until the phase value meets the requirement; if the tested cable exceeds the phase parameter value, calculating the length of the core wire to be compensated, and marking a compensation mark; stripping the other end of the cable assembly, adjusting stripping compensation parameters if the compensation mark exists, and simultaneously installing a connector on the other end of the cable assembly; and carrying out double-end phase inspection test on the cable components in the same batch one by one, and correcting a few cables exceeding the phase parameter value requirement. The application has the advantages that: the links of repeatedly taking and assembling the connector and the contact pins, shearing the core wires, removing residual soldering tin in the connector and the like are avoided, the assembly cost of the assembly is saved, and the assembly welding quality is improved.
Description
Technical Field
The application relates to the technical field of radio frequency cable assembly test, in particular to a single-ended phase correction method for phase matching cable assembly.
Background
At present, in order to ensure the consistency of the electrical length of the radio frequency cable assembly, a double-end phase matching method is generally adopted for cable assembly and test work, and the method mainly comprises the following steps: (1) Attaching connectors at two ends of cables of the same batch of phases to be assembled; (2) Testing to determine and normalize a reference cable, wherein the cable with the shortest electrical length is usually used as the reference cable; (3) Performing phase comparison between the tested cable and the reference cable, and recording a phase difference value; (4) Disassembling and assembling a connector at one end, calculating the length of the core wire to be sheared according to the phase difference value, processing, and assembling the connector after finishing; (5) Repeating the steps (3) and (4) until the phase of the tested cable meets the phase parameter range of the established design requirement.
However, the prior art has the following problems: (1) The core wire processing link in the cable assembly phase distribution cannot master the phase change condition of the assembly, and the work of core wire processing, connector attachment, phase test and the like which are required for a plurality of times are difficult to avoid; (2) The assembly staff performs repeated assembly and test work in a large number in the phase matching link, so that the time cost and the personnel cost are greatly increased; (3) The connector insert and the bushing are difficult to avoid being welded for multiple times, so that the weldability of a welding part is poor, and the overall reliability of the cable assembly is affected; (4) When the cable assembly works at a higher frequency, the difficulty of phase matching assembly is multiplied by the existing method, and phenomena such as scrapping of the cable assembly or incapability of completing phase matching cable assembly are easily caused.
Disclosure of Invention
The application aims to overcome the defects of the prior art, provides a single-end phase correction method for a phase-matching cable, and solves the problems existing in the prior art.
The aim of the application is achieved by the following technical scheme: a single-ended phase correction method for a phase-matched cable, comprising:
step 1: the cable is taken off the line and peeled. Setting a cable offline stripping program according to the length requirement, and performing accurate offline and stripping treatment on the cable by using a full-automatic stripping cutting machine;
step 2: the header connector is attached. After the single-end of the cable assembly is subjected to tin immersion, a coaxial cable stripping machine is used for stripping the end, and a single-end connector is attached; the other end is not stripped and is connected with a connector;
step 3: and (5) vector network configuration. After the vector network analyzer is calibrated, configuring and setting an S11 and S22 dual-channel Phase display interface, and simultaneously selecting the expansion Phase expanding Phase function of the vector network analyzer;
step 4: and (5) determining a reference cable. Single-end phase testing is carried out on the cables in the same batch one by one, normalization processing is carried out on single-end cable assemblies with the largest relative phase value until the testing is complete, and the single-end reference cable in the batch is determined;
step 5: and determining single-end phase parameters of the cable assembly. Determining the phase parameter requirement of the finished cable assembly, and determining the phase parameter value required by the phase correction of the single-ended cable assembly according to the requirement;
step 6: single-ended phase test analysis of cable assemblies. Performing single-end phase testing on the cable components, connecting the tested single-end cable components to a vector network analyzer one by one, and calculating the length delta L of the core wire to be sheared according to the tested phase difference value;
step 7: and correcting the single-end phase of the cable assembly. The tested cable assembly is not disassembled and assembled, a precise wire trimming tool is used for trimming the open end of the cable assembly, real-time phase detection, correction and control of the assembly are realized, and the phase value of the single-ended cable assembly in the vector network analyzer is observed in real time until the phase value meets the requirement of the single-ended phase value;
step 8: single-ended phase compensation. According to the phase value of the tested cable, if the phase parameter exceeds the upper limit of the phase parameter requirement, calculating the length of the core wire to be compensated, and carrying out compensation marking;
step 9: the other end of the cable assembly is assembled. Stripping the other end of the cable assembly by using a coaxial cable stripping machine, and adjusting stripping compensation parameters if a compensation mark exists; meanwhile, a connector is arranged at the other end of the assembly cable;
step 10: and detecting parameters of the cable assemblies, namely carrying out phase detection on finished cable assemblies in the same batch one by one, and ensuring that the phase parameters of the cable assemblies meet the product requirements.
The application has the following advantages:
1. by combining the vector network analyzer and the precise wire repair tool, the real-time phase detection, correction and control of the assembly are realized under the condition that the single-ended cable assembly is not disassembled, the controllability and the accuracy of phase parameters are improved, and the phase correction of the single-ended cable assembly is realized in place at one time;
2. the original double-channel test mode is changed into single-channel test, so that the two channels of the vector network analyzer can be fully utilized to perform single-end phase detection of the cable assembly without mutual influence, and simultaneously, the single-end cable phase can be controlled in real time in the phase correction process, so that the cable phase correction efficiency is greatly improved;
3. the links of repeatedly taking and assembling the connector and the contact pins, shearing the core wires, removing residual soldering tin in the connector and the like are avoided, the assembly cost of the assembly is saved, and the assembly welding quality is improved;
4. the assembly efficiency of the cable assembly is remarkably and effectively improved, the cable assembly is assembled according to the process flow, the one-time assembly qualification rate is extremely high, and the method can be popularized to the assembly of the radio frequency cable with higher frequency;
5. the assembly of the radio frequency phase matching cable can be effectively promoted to be carried out in a pipelining mode, and a new idea is provided for expanding the production scale of the radio frequency phase matching cable.
Drawings
FIG. 1 is a schematic flow chart of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Accordingly, the following detailed description of the embodiments of the application, as presented in conjunction with the accompanying drawings, is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application. The application is further described below with reference to the accompanying drawings.
As shown in fig. 1, the application relates to a single-end phase correction method for assembling a phase-matching cable, which is realized by comprehensively using a full-automatic cutting and stripping machine, a vector network analyzer, coaxial cable stripping machine equipment and a precise wire repair tool, and fully researches a phase parameter theory;
the full-automatic cutting and stripping machine is mainly used for performing accurate offline operation on cables, and guaranteeing the consistency of the offline physical lengths of cables in the same batch; the vector network analyzer is mainly used for testing phase parameters of the cable assembly; the coaxial cable stripping machine is mainly used for adjusting and stripping the cable end according to parameters; the precise wire trimming tool is mainly used for real-time phase correction under the condition of not disassembling and assembling the test cable in the phase correction link.
For the single-channel and double-channel Phase test of the component cable, the electrical length of the single-channel test of the cable component is approximately 2 times of that of the double-channel test, so that the relation between single-end Phase correction and double-end Phase matching in core wire shearing length is calculated and verified theoretically, and a calculation formula is formed:
wherein. V (V) p For the cable transmission speed ratio, only the effective value before the percentage is taken, f is the frequency, the unit is GHz, and beta is the phase difference between the test cable and the reference cable.
Combining theoretical calculation, verifying parameters of single-end phase correction phase requirements to form phase requirements capable of guiding assembly operation and guaranteeing one-time qualification rate of cable components: when the single-ended phase correction phase consistency requirement is 1/2 of the cable assembly phase consistency requirement, the one-time qualification rate of the cable assembly test is higher, and the design and process assembly requirements can be met.
The flow of the method specifically comprises the following steps:
step 1: the cable is taken off the line and peeled. Setting a cable offline stripping program according to the length requirement, and performing accurate offline and stripping treatment on the cable by using a full-automatic stripping cutting machine;
step 2: the header connector is attached. After the single-end of the cable assembly is subjected to tin immersion, a coaxial cable stripping machine is used for stripping the end, and a single-end connector is attached; the other end is not stripped and is connected with a connector;
step 3: and (5) vector network configuration. After the vector network analyzer is calibrated, configuring and setting an S11 and S22 dual-channel Phase display interface, and simultaneously selecting the expansion Phase expanding Phase function of the vector network analyzer;
step 4: and (5) determining a reference cable. Single-end phase testing is carried out on the cables in the same batch one by one, normalization processing is carried out on single-end cable assemblies with the largest relative phase value until the testing is complete, and the single-end reference cable in the batch is determined;
step 5: and determining single-end phase parameters of the cable assembly. Determining the phase parameter requirement of the finished cable assembly, and determining the phase parameter value required by the phase correction of the single-ended cable assembly according to the calculated requirement;
step 6: single-ended phase test analysis of cable assemblies. Performing single-end phase testing on the cable assemblies, connecting the tested single-end cable assemblies to a vector network analyzer one by one, and calculating the length delta L of the core wire to be sheared according to a formula (1) according to the tested phase difference value;
for example: if the working frequency of a certain cable assembly is 10GHz, the transmission speed ratio is 83%, and the beta value is 5 degrees, the working frequency is calculated by the formula (1): the cable assembly has a single-ended phase correction cable core length DeltaL of 0.1729mm compared to a reference cable at that frequency.
Step 7: and correcting the single-end phase of the cable assembly. The tested cable assembly is not disassembled and assembled, a precise wire trimming tool is used for trimming the open end of the cable assembly, real-time phase detection, correction and control of the assembly are realized, and the phase value of the single-ended cable assembly in the vector network analyzer is observed in real time until the phase value meets the single-ended phase value in the step (5);
step 8: single-ended phase compensation. According to the phase value of the tested cable, if the phase parameter exceeds the upper limit of the phase parameter requirement, calculating the length of the core wire to be compensated according to a formula (1), and carrying out compensation marking;
for example: the electrical length corresponding to 1 ° is 0.035mm given the single ended cable assembly formula, with a relative phase of +10° with the reference cable. ΔL' L0.35mm can be calculated according to formula (2), i.e. the single-ended phase compensation of the cable assembly is 0.35mm.
Step 9: the other end of the cable assembly is assembled. Stripping the other end of the cable assembly by using a coaxial cable stripping machine, and adjusting stripping compensation parameters if a compensation mark exists; meanwhile, a connector is arranged at the other end of the assembly cable;
for example: setting a single-end cable assembly to be 0.35mm according to the single-end phase compensation in the step (8); the normal stripping length of the inner conductor of the connector matching cable is 5mm. At this time, the stripping length of the inner conductor of the cable needs to be adjusted in the stripping parameters of the coaxial stripping machine and is set to be 5mm-0.35mmL4.65mm.
Step 10: and detecting parameters of the cable assembly. And carrying out phase detection on finished cable assemblies in the same batch one by one, and ensuring that the phase parameters of the cable assemblies meet the product requirements.
The foregoing is merely a preferred embodiment of the application, and it is to be understood that the application is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the application are intended to be within the scope of the appended claims.
Claims (4)
1. A single-ended phase correction method for a phase-matching cable is characterized by comprising the following steps of: the single-ended phase correction method comprises a test correction step, wherein the test correction step comprises the following steps:
single-end phase testing is carried out on single-end cables in the same batch one by one, normalization processing is carried out on single-end cable assemblies with the largest relative phase value, and reference cables are determined and marked;
performing single-end phase testing on the cable components, connecting the tested single-end cable components to a vector network analyzer one by one, and calculating the length delta L' of the core wire to be sheared according to the tested phase difference value;
carrying out wire repair treatment on the open end of the cable assembly to realize real-time phase detection, correction and control on the cable assembly, and observing the phase value of the single-ended cable assembly in the vector network analyzer in real time until the phase value meets the phase parameter requirement;
judging whether the tested cable exceeds the phase parameter value, if so, calculating the length of the core wire to be compensated, and marking the compensation mark;
stripping the other end of the cable assembly, adjusting stripping compensation parameters if the compensation mark exists, and simultaneously installing a connector on the other end of the cable assembly;
carrying out phase inspection test on the cable components in the same batch one by one, and correcting the cables exceeding the phase parameter value requirement;
core cut length and phase compensation length of single-ended phase correction: i.e.Wherein V is p The transmission speed ratio of the cable is f, the frequency is f, and the phase difference between the test cable and the reference cable is beta.
2. A single-ended phase correction method for a phase-matched cable according to claim 1, wherein: the single-ended phase correction method further comprises a preprocessing step, wherein the preprocessing step is performed before the test correction step, and the preprocessing step is not performed after the preprocessing of the same batch of cable components is completed.
3. A single-ended phase correction method for a phase-matched cable according to claim 2, wherein: the preprocessing step comprises the following steps:
setting a cable offline stripping program according to the length requirement, and carrying out advanced accurate offline and stripping treatment on the cable;
the single-end of the cable assembly is subjected to tin dipping, stripping and stripping are carried out through a coaxial cable, a single-end connector is connected, and the other end is not stripped and connected with the connector;
calibrating a vector network analyzer, setting S11 and S12 double-channel phase display, and expanding a phase function by selecting the vector network analyzer;
and determining the phase parameter requirement of the finished cable assembly, and determining the phase parameter value required by the phase correction of the single-ended cable assembly according to the requirement.
4. A single-ended phase correction method for a phase-matched cable according to claim 2, wherein: the phase parameter determination requirement of single-end phase correction is as follows: half of the phase consistency requirement of the finished cable assembly.
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