CN113884793A - Universal cable shielding performance test system and test method thereof - Google Patents
Universal cable shielding performance test system and test method thereof Download PDFInfo
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- CN113884793A CN113884793A CN202111136169.6A CN202111136169A CN113884793A CN 113884793 A CN113884793 A CN 113884793A CN 202111136169 A CN202111136169 A CN 202111136169A CN 113884793 A CN113884793 A CN 113884793A
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- 238000012360 testing method Methods 0.000 claims abstract description 161
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 230000008859 change Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
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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
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
Abstract
The invention relates to the technical field of cable performance test, and discloses a universal cable shielding performance test system and a test method thereof, wherein the universal cable shielding performance test system comprises the following steps: step 1: arranging a piece to be tested between the clamping piece and the socket, wherein a plug in the piece to be tested is connected with a cable; connecting the plug and the socket, and fixing the cable through the clamping piece; installing an injection line on a piece to be tested; step 2: connecting the injection end with a piece to be tested; injecting an electric signal into the to-be-detected piece through the injection end to enable the to-be-detected piece to generate an electromagnetic signal; and step 3: the output port is connected with the injection line and the test end, and the input port is connected with the to-be-tested piece and the test end; and monitoring the electromagnetic signal change condition of the piece to be tested through the test end. The invention can achieve the effects of reducing the test cost, improving the test efficiency and improving the universality of the test system, can test the shielding performance of a relatively complete cable connection network, and has reliable and effective test results.
Description
Technical Field
The invention relates to the technical field of cable performance testing, in particular to a universal cable shielding performance testing system and a testing method thereof.
Background
With the wide application of various electric and electronic devices, electromagnetic pollution and radiation interference are increasingly increased, and therefore, shielding measures should be taken for all unit components, especially cable components, in the whole electronic system. Accordingly, the shielding performance of the cable is improved, and the method is an effective means for reducing electromagnetic pollution and radiation interference. To improve the shielding performance, qualitative research and measurement analysis are required to be performed on the shielding performance of the cable, and accordingly, a special test system and a special test method are required to be adopted.
The test system in the laboratory at present tests the cable of single specification, can effectively test the shielding performance of single cable, but this kind of test system does not have the commonality, and application scope is little, can't test different cables. If the specification of the cable to be tested is inconsistent with the reserved hole of the shielding box in the testing system, the whole testing system needs to be replaced, and if connectors or cables of various specifications need to be tested, various testing systems need to be arranged in advance for standby, so that the manufacturing cost is high, time is consumed for installation and wiring of each testing system, and the detection efficiency is greatly reduced. Moreover, because the connection states of the cables to be tested are different, for example, some cables are connected with the connectors, some cables are connected with the plugs, and a proper test tool needs to be independently selected to be connected again in a specific test, so that the operation is troublesome, the time cost is high, and the manufacturing cost is also high.
In addition, in the existing cable shielding performance test, the test object is a single cable test or a cable test with a connector. This is arranged so that, first, the inclusion range of the test object is incomplete-no test is directed to a plugged cable; secondly, the test objects are all single cables or partial structures of cable connection, and the overall test is not sufficient under the condition that the test is not performed on a relatively complete cable connection network.
Disclosure of Invention
The invention aims to provide a universal cable shielding performance testing system and a testing method thereof, so as to achieve the effects of reducing testing cost, improving testing efficiency and improving the universality of the testing system, and can test the shielding performance of a relatively complete cable connection network, and the testing result is reliable and effective.
The invention provides a universal cable shielding performance testing method, which comprises the following steps:
step 1: arranging a piece to be tested between the clamping piece and the socket, wherein a plug in the piece to be tested is connected with a cable; connecting the plug and the socket, and fixing the cable through the clamping piece; installing an injection line on a piece to be tested;
step 2: connecting the injection end with a piece to be tested; injecting an electric signal into the piece to be tested through the injection end to enable the piece to be tested to generate an electromagnetic signal; the output port is connected with one end of the injection line and the test end, and the other end of the injection line and the load resistor are connected; the input port is connected with one end of the piece to be tested and the test end, and the other end of the piece to be tested and the load resistor are connected;
and step 3: and monitoring the electromagnetic signal change condition of the piece to be tested through the test end.
The effect and the advantage of the scheme are that: the test object is a to-be-tested piece formed by connecting a cable and a plug, and the shielding performance of the cable with the plug can be effectively tested. Firstly, the setting breaks through the limitation of the conventional test standard. In the existing shielding performance test standard, a test object is a single-section cable, so in the actual test in the field at present, due to the limitation of the standard and the thinking formula of people, people also perform the test aiming at the single-section cable during the test, only the shielding performance of a single part is concerned, the shielding performance of the cable in different connection states is not concerned, and the shielding performance of the whole network formed by different parts is good; therefore, the test for the cable connected with the plug is not carried out, the test object has limitation, and the test result also has limitation.
The scheme breaks through the limitation, so that the whole test method is suitable for cables with different connection states to carry out whole shielding performance test, and the application range is expanded.
Secondly, the actual application scenes of the cable are various, and the whole power system or the information transmission system can be built without a single cable section, so that the function of transmitting electric energy or signals is achieved; the cable and other devices need to be matched with each other, such as a plug; they act together to complete the complete transmission of electrical energy or signals. And, due to the connection of the cable with other devices, their working performance, including shielding performance, will affect each other accordingly, and at this time, the shielding performance test result for the single-section cable before will lose reference value. Therefore, compared with the good and bad shielding performance of a single-section cable, the better attention needs to be paid to the good and bad overall shielding performance of the cable connected with other devices, which is really concerned by users in the practical application of the cable, and the effect of reducing electromagnetic pollution, radiation interference and radiation leakage can be achieved in the practical application only if the overall shielding performance is good.
The scheme is used for testing the cable connected with the plug, the overall shielding performance of the cable connected with the plug can be accurately tested, the attention points of users in practical application are met, the overall shielding performance of the cable in practical application can be effectively judged, and reliable data support is provided.
Further, in step 1, the socket is provided on the first shield box.
By the arrangement, the cable part which does not participate in the test can be placed in the shielding box to shield the signal of the cable part, so that the detection signal of the test end is prevented from being influenced, and the test result is inaccurate.
Further, the first shielding box comprises a replaceable replacement plate, and the socket is arranged on the replacement plate; when the plug and the socket are connected, the replacement plate is correspondingly replaced according to the specification of the plug, and then the plug and the corresponding socket are connected.
The arrangement is that different sockets can be installed by replacing the replacement plate, so that the plug connector can be conveniently connected with plugs of different specifications. The cable testing device can quickly complete connection and testing of cables of different specifications by replacing local parts, and has good universality, high testing efficiency and low testing cost.
Furthermore, the load resistor is arranged on the replacement board, when the plug and the socket are connected, one end of the load resistor is connected with the terminal of the plug, and the other end of the load resistor is connected with the replacement board.
By the arrangement, the load resistor can reduce current and prevent electromagnetic signals from being greatly attenuated except for the piece to be detected; and, set up like this, add load resistance between shielding layer and the heart yearn of the piece that awaits measuring, whole test environment accords with standard requirement, guarantees that the test result that obtains is effective reliable.
Furthermore, a plurality of threaded holes are formed in the replacement plate; the threaded hole is used for being matched with the fastener to fix the load resistor.
Set up like this, can fix load resistance's one end on the board of replacing through screw hole cooperation fastener, link to each other load resistance and board of replacing, linked together first shielding box and the heart yearn of cable promptly through load resistance, can play the effect of ground connection, guarantee that the electric current of cable can derive, play the guard action, whole test procedure is safer.
Furthermore, the socket is provided with an elastic sheet which is contacted with the replacing plate.
By the arrangement, when the socket is not connected with the plug, the elastic sheet can prevent foreign matters from entering the socket to influence the subsequent connection with the plug; and moreover, the elastic sheet is connected with the replacing plate, so that the grounding effect can be achieved, the protection effect is achieved, and the whole test process is safer.
Further, in step 1, the clamping piece is connected with one end of a connecting cylinder, and the other end of the connecting cylinder is connected with the second shielding box; the connecting cylinder is used for connecting a connector for fixing a cable.
Set up like this, can be to being connected with the cable of connector to and be connected with the cable of connector and plug and test, the scope that the test object encompasses is wider, can satisfy the test demand that is in the cable of different connection status, and the application scope of test is wider, and the commonality is stronger. And furthermore, the relatively complete cable connection network comprising the connector and the socket is integrally tested, so that the overall shielding performance result of the connector, the cable and the plug is obtained, the requirements of practical application are met, the overall shielding performance of the cable in practical application can be judged effectively, and more reliable data support is provided.
Further, the first shielding box also comprises a shielding box upper cover, and an injection plate is arranged on the shielding box upper cover; the injection plate is used for fixing the injection line.
Set up like this, the injection line accessible injection plate is firm to be set up, is convenient for constitute complete test environment, guarantees that the test result is effectual.
The invention also provides a universal cable shielding performance testing system which comprises an injection end, a testing end, a clamping piece and a first shielding box; the injection end is used for injecting an electric signal into the piece to be tested; the test end is used for testing the electromagnetic signal change condition of the piece to be tested; the clamping piece is used for fixing the piece to be detected; the first shielding box is provided with a socket, the piece to be tested comprises a cable and a plug which are connected, and the socket is used for connecting the plug.
The effect and the advantage of the scheme are that: the test object is a to-be-tested piece formed by connecting a cable and a plug, and the shielding performance of the cable with the plug can be effectively tested. The method breaks through the limitation of the conventional test standard, can test the shielding performance of a relatively complete cable connection network, and has reliable and effective test results.
Further, the first shield box includes a replaceable replacement plate, and the socket is provided on the replacement plate.
The arrangement is that the same system is adopted, and the connection and the test of cables with different specifications and different connection states can be quickly completed by replacing local parts, so that the test system has higher universality, higher overall test efficiency and lower test cost.
Drawings
Fig. 1 is a flowchart of a method for testing shielding performance of a universal cable according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a universal cable shielding performance testing system according to a third embodiment of the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
the reference numbers in the drawings of the specification include: the device comprises a first shielding box 1, a replacing plate 11, a socket 12, a shielding box upper cover 13, an injection plate 14, a clamping piece 2, a second shielding box 3, a connecting cylinder 4, a workbench 5 and a T-shaped groove 6.
The first embodiment is as follows:
as shown in fig. 1, the system and method for testing shielding performance of a universal cable according to the present embodiment provides a method for testing shielding performance of a universal cable, including the following steps:
step 1: arranging a piece to be tested between the clamping piece 2 and the socket 12, wherein a plug in the piece to be tested is connected with a cable; connecting the plug and the socket 12, and fixing the cable through the clamping piece 2; an injection line is installed on the piece to be tested, the injection line is a flat injection line in the embodiment, the injection line needs to be tightly attached to the surface of a cable in the piece to be tested, and the axial direction of the flat injection line and the axial direction of the cable in the piece to be tested are in the same direction.
Specifically, in the present embodiment, the receptacle 12 is provided on the replacement board 11 of the first shield case 1, the replacement board 11 is replaceable, when the plug and the receptacle 12 are connected, the specification of the receptacle 12 corresponding to the specific specification of the plug is selected, the replacement board 11 on which the adapted receptacle 12 is provided is mounted on the first shield case 1, and then the plug and the receptacle 12 are connected. By the arrangement, the socket 12 can be replaced quickly, the test requirements of plugs of different specifications are met, and the test has universality. The first shielding box 1 further comprises a shielding box upper cover 13, and an injection plate 14 is arranged on the shielding box upper cover 13; the injection plate 14 is used to fix the injection line.
Step 2: connecting the injection end with a piece to be tested; injecting an electric signal into the piece to be tested through the injection end to enable the piece to be tested to generate an electromagnetic signal; the output port is connected with one end of the injection line and the test end, and the other end of the injection line and the load resistor are connected; and the input port is connected with one end of the piece to be tested and the input port of the testing end, and the other end of the piece to be tested and the load resistor are connected.
And step 3: and monitoring the electromagnetic signal change condition of the piece to be tested through the test end.
Specifically, in this embodiment, the injection end adopts a power supply device commonly used in a laboratory to provide a power supply for the piece to be tested; and the test end adopts a conventional network analyzer for analyzing the overall shielding performance of the piece to be tested. In this embodiment, an ZNL 6-type network analyzer may be used, that is, the injection line is connected to the output port of the network analyzer, and the device under test is connected to the input port of the network analyzer.
The embodiment also provides a universal cable shielding performance testing system, which comprises an injection end, a testing end, a clamping piece 2 and a first shielding box 1; the injection end is used for injecting an electric signal into the piece to be tested; the test end is used for testing the electromagnetic signal change condition of the piece to be tested; the clamping piece 2 is used for fixing a piece to be detected; the first shielding box 1 is provided with a socket 12, the piece to be tested comprises a cable and a plug which are connected, and the socket 12 is used for connecting the plug.
Specifically, the injection end adopts a power supply device commonly used in a laboratory, the test end adopts a conventional network analyzer, and an ZNL6 type network analyzer can be adopted in the embodiment. The first shield case 1 includes a replaceable substitution plate 11, and a receptacle 12 is provided on the substitution plate 11.
Specifically, the replacement plate 11 is provided with an opening for fixedly connecting the socket 12. By the arrangement, the processing cost of the replacement plate 11 is low, the positions and the shapes of the holes are changed when the replacement plate faces to the sockets 12 which need to be connected and fixed and have different specifications, the whole set of test system can be suitable for the test requirements of plugs and cables of various specifications on the market through simple processing, and the universality of the system is high.
The arrangement is that the same system is adopted, and the connection and the test of cables with different specifications and different connection states can be quickly completed by replacing local parts, so that the test system has higher universality, higher overall test efficiency and lower test cost.
The test method and the test system provided by the embodiment can be used for carrying out overall shielding performance test on the cable with the plug, breaks through the limitation of the conventional test standard, can be used for testing the shielding performance of a relatively complete cable connection network, and are reliable and effective in test result. And can be applicable to the cable that is connected with the plug of different specifications wholly tests, possesses the commonality.
Example two:
the embodiment provides a universal cable shielding performance test system and a test method thereof, and provides a universal cable shielding performance test method, which comprises the following steps:
step 1: arranging a piece to be tested between the clamping piece 2 and the socket 12, wherein a plug in the piece to be tested is connected with a cable; connecting the plug and the socket 12, and fixing the cable through the clamping piece 2; and installing an injection line on the piece to be tested.
Specifically, in the present embodiment, the receptacle 12 is provided on the replacement board 11 of the first shield case 1, the replacement board 11 is replaceable, when the plug and the receptacle 12 are connected, the specification of the receptacle 12 corresponding to the specific specification of the plug is selected, the replacement board 11 on which the adapted receptacle 12 is provided is mounted on the first shield case 1, and then the plug and the receptacle 12 are connected.
A plurality of load resistors are arranged in the first shielding box 1, a load with a required target resistance value is obtained by connecting the plurality of load resistors in parallel, and the load resistors are uniformly distributed around the connection position of the connection terminals of the plug. In this embodiment, 5 load resistors are provided, and the load resistors are connected in parallel. When the plug and the socket 12 are connected, one end of the load resistor is connected with the terminal of the plug; the other end of the load resistor is connected to the surface of the replacement board 11.
Specifically, be equipped with the screw hole on the replacement board 11, the screw hole is used for cooperating the fixed load resistance of fastener, and the fastener can be common fasteners such as screw, bolt, and in this embodiment, mountable screw in the screw hole is fixed to replacement board 11 through the screw with load resistance's one end on, simultaneously, load resistance's the other end links to each other with the wiring end of plug, sets up like this, adds load resistance between the heart yearn of shielding layer and the piece that awaits measuring, can reduce current, prevents that electromagnetic signal from having great decay except the piece that awaits measuring.
Moreover, the socket 12 is provided with a spring plate; the spring plate is in contact with the substitution plate 11. Specifically, the replacing plate 11 is further provided with an opening corresponding to the elastic sheet on the socket 12 in shape and position, so that the elastic sheet can be well contacted with the replacing plate 11. By the arrangement, when the plug is not connected with the socket 12, the elastic sheet can prevent foreign matters from entering the socket 12 to influence the subsequent connection with the plug; and, the shell fragment is connected and is replaced board 11, can play the effect of ground connection, plays the guard action, and whole test procedure is safer.
In addition, in the present embodiment, the clamping member 2 is connected to the second shield box 3 through the connecting cylinder 4, and the connecting cylinder 4 is used for connecting a connector for fixing a cable. By the arrangement, the test object can simultaneously test the overall shielding performance of the cable, the connector and the plug which are connected. Moreover, the test requirements of cables in different connection states can be met, and the test requirements of the cables with the connectors, the cables with the plugs and the cables connected with the plugs and the connectors at the same time are met.
Step 2: connecting the injection end with a piece to be tested; injecting an electric signal into the piece to be tested through the injection end to enable the piece to be tested to generate an electromagnetic signal; the output port is connected with one end of the injection line and the test end, and the other end of the injection line and the load resistor are connected; the input port is connected with one end of the piece to be tested and the test end, and the other end of the piece to be tested and the load resistor are connected;
and step 3: and monitoring the electromagnetic signal change condition of the piece to be tested through the test end.
The embodiment also provides a universal cable shielding performance testing system, which further comprises a second shielding box 3 and a connecting cylinder 4 on the basis of the first embodiment, wherein one end of the connecting cylinder 4 is connected with the second shielding box 3, and the other end of the connecting cylinder 4 is connected with the clamping piece 2; the connecting cylinder 4 is used for connecting a connector for fixing a cable.
The testing method and the testing system provided by the embodiment can test the cable connected with the connector and the plug, the included range of the test object is wider, and the test universality is further improved.
Example three:
the embodiment provides a universal cable shielding performance test system and a test method thereof, and the universal cable shielding performance test method is further detailed in the step 1 on the basis of the second embodiment: arranging a to-be-tested piece formed by connecting a cable and a plug between the clamping piece 2 and the socket 12; the plug and the socket 12 are connected and the cable is fixed by the clamp 2. Specifically, in the present embodiment, the socket 12 is provided on the replacement board 11 of the first shield case 1, and the replacement board 11 is replaceable. First shielding box 1 and holder 2 are all located on workstation 5 to, first shielding box 1 and holder 2 can slide on workstation 5.
After the plug and the socket 12 are connected and the cable is fixed by the clamping piece 2, the positions of the clamping piece 2 and the first shielding box 1 are moved and adjusted, so that the whole cable is unfolded and straightened. Set up like this, can be through the position of adjusting holder 2 and first shielding box 1, adapt to the cable test demand of different length, the application scope of test is wider. Moreover, after the cable is straightened, the obtained test result is more accurate, and the test cannot be interfered by the bending of the cable.
As shown in fig. 2, the embodiment further provides a universal cable shielding performance testing system, which further includes a workbench 5 on the basis of the second embodiment, and the first shielding box 1, the second shielding box 3, the connecting cylinder 4 and the clamping member 2 are all arranged on the workbench 5; first shielding box 1, second shielding box 3 and holder 2 and workstation 5 sliding connection, both ends are equipped with two locking mechanism corresponding to first shielding box 1 and second shielding box 3 about workstation 5. Specifically, be equipped with the slide on workstation 5, the slide is T-slot 6 in this embodiment, and the waist hole is all seted up with the bottom of first shielding box 1 and second shielding box 3 to the lateral wall in T-slot 6, wears to establish fastening screw in the waist hole, can make first shielding box 1 and second shielding box 3 fix the optional position on workstation 5 through the waist hole like this according to the actual need of test, is convenient for adjust.
The testing method and the testing system provided by the embodiment are suitable for testing cables with different lengths, the universality of the testing system is further enhanced, the cables can participate in testing in a straightened state, and the testing result is more accurate.
Example four:
the embodiment provides a universal cable shielding performance test system and a test method thereof, and provides a universal cable shielding performance test method, which comprises the following steps:
step 1: arranging a piece to be tested between the clamping piece 2 and the socket 12, wherein a plug in the piece to be tested is connected with a cable; connecting the plug and the socket 12, and fixing the cable through the clamping piece 2; and installing an injection line on the piece to be tested. In this embodiment, both ends of the cable are connected to plugs, the first shielding box 1 and the second shielding box 3 are both provided with sockets 12, and when the plugs and the sockets 12 are connected, the plugs are respectively connected to the corresponding sockets 12.
Step 2: connecting the injection end with a piece to be tested; injecting an electric signal into the piece to be tested through the injection end to enable the piece to be tested to generate an electromagnetic signal; the output port is connected with one end of the injection line and the test end, and the other end of the injection line and the load resistor are connected; the input port is connected with one end of the piece to be tested and the test end, and the other end of the piece to be tested and the load resistor are connected;
and step 3: and monitoring the electromagnetic signal change condition of the piece to be tested through the test end.
The embodiment also provides a universal cable shielding performance testing system, which comprises an injection end, a testing end, a clamping piece 2 and a first shielding box 1; the injection end is used for injecting an electric signal into the piece to be tested; the test end is used for testing the electromagnetic signal change condition of the piece to be tested; the clamping piece 2 is used for fixing a piece to be detected; the first shielding box 1 is provided with a socket 12, the piece to be tested comprises a cable and a plug which are connected, and the socket 12 is used for connecting the plug; the novel shielding box comprises a first shielding box body 1 and a second shielding box body 3, wherein the first shielding box body 3 is of the same structure as the second shielding box body 1, and a socket 12 for connecting a plug is also arranged on the second shielding box body 3.
The test method and the test system provided by the embodiment can be used for testing the whole cable with the plugs connected at the two ends, and the range of the test object is further expanded.
Example five:
the present embodiment provides a universal cable shielding performance testing system and a testing method thereof, which are the same as the methods described in the third embodiment, and therefore are not described in detail.
As shown in fig. 2, the embodiment further provides a universal cable shielding performance testing system, on the basis of the third embodiment, the structure of the first shielding box 1 is improved, the shielding box upper cover 13 is provided with a plurality of threaded holes uniformly arranged in an array, and the shielding box upper cover 13 can be fixed above the first shielding box 1 by using common screws. The interval between adjacent screw is 1/10-1/5 of length or width, and the screw forms the shielding face with shielding box upper cover 13 each other like this, and then plays a face and shields the effect, and first shielding box 1's whole shielding effect is better, and the test result is more accurate.
According to the test method and the test system provided by the embodiment, the shielding performance of the shielding box is better, and the test result is more accurate.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics of the embodiments has not been described in detail, so that a person of ordinary skill in the art can understand all the common technical knowledge in the field of the invention before the application date or the priority date, can know all the prior art in the field, and have the ability to apply routine experimentation before the application date. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A universal cable shielding performance test method is characterized by comprising the following steps:
step 1: arranging a piece to be tested between the clamping piece and the socket, wherein a plug in the piece to be tested is connected with a cable; connecting the plug and the socket, and fixing the cable through the clamping piece; installing an injection line on a piece to be tested;
step 2: connecting the injection end with a piece to be tested; injecting an electric signal into the to-be-detected piece through the injection end to enable the to-be-detected piece to generate an electromagnetic signal; the output port is connected with one end of the injection line and the test end, and the other end of the injection line and the load resistor are connected; the input port is connected with one end of the piece to be tested and the test end, and the other end of the piece to be tested and the load resistor are connected;
and step 3: and monitoring the electromagnetic signal change condition of the piece to be tested through the test end.
2. The method for testing shielding performance of a universal cable according to claim 1, wherein in step 1, the socket is disposed on the first shielding box.
3. The universal cable shielding performance testing method according to claim 2, wherein the first shielding box comprises a replaceable replacement plate, and the socket is arranged on the replacement plate; when the plug and the socket are connected, the replacement plate is correspondingly replaced according to the specification of the plug, and then the plug and the corresponding socket are connected.
4. The method for testing the shielding performance of the universal cable according to claim 3, wherein the load resistor is arranged on the replacing board, when the plug and the socket are connected, one end of the load resistor is connected with the terminal of the plug, and the other end of the load resistor is connected with the replacing board.
5. The universal cable shielding performance testing method according to claim 4, wherein the replacement plate is provided with a plurality of threaded holes; the threaded hole is used for being matched with the fastener to fix the load resistor.
6. The method for testing the shielding performance of the universal cable according to claim 3, wherein the socket is provided with a spring sheet, and the spring sheet is in contact with the replacement plate.
7. The method for testing shielding performance of a universal cable according to claim 1, wherein in step 1, the clamping member is connected with one end of a connecting cylinder, and the other end of the connecting cylinder is connected with the second shielding box; the connecting cylinder is used for connecting a connector for fixing a cable.
8. The universal cable shielding performance testing method according to claim 2, wherein the first shielding box further comprises a shielding box upper cover, and an injection plate is arranged on the shielding box upper cover; the injection plate is used for fixing an injection line.
9. A universal cable shielding performance test system is characterized by comprising an injection end, a test end, a clamping piece and a first shielding box; the injection end is used for injecting an electric signal into the piece to be tested; the test end is used for testing the electromagnetic signal change condition of the piece to be tested; the clamping piece is used for fixing the piece to be detected; the first shielding box is provided with a socket, the piece to be tested comprises a cable and a plug which are connected, and the socket is used for connecting the plug.
10. The universal cable shielding performance testing system of claim 9, wherein the first shielding box comprises a replaceable replacement board, and the socket is disposed on the replacement board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111136169.6A CN113884793A (en) | 2021-09-27 | 2021-09-27 | Universal cable shielding performance test system and test method thereof |
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| US4647844A (en) * | 1984-08-03 | 1987-03-03 | Cooper Industries, Inc. | Method and apparatus for testing shielded cable assemblies |
| WO2009034620A1 (en) * | 2007-09-11 | 2009-03-19 | Advantest Corporation | Connector, conductive member, its manufacturing method, performance board, and testing device |
| JP2011106859A (en) * | 2009-11-13 | 2011-06-02 | Mitsubishi Electric Corp | Circuit and method for evaluating shielding performance, and shield case |
| CN207662970U (en) * | 2017-12-26 | 2018-07-27 | 德尔福派克电气系统有限公司 | A kind of beam shield performance test fixture and test system |
| CN208109955U (en) * | 2018-03-28 | 2018-11-16 | 上海乐来汽车分析测试有限公司 | A kind of shielding properties test macro of Belt connector harness |
| CN211505699U (en) * | 2019-12-11 | 2020-09-15 | 上海电器科学研究院 | Electric automobile connector and shielded cable system's line injection method testing arrangement |
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- 2021-09-27 CN CN202111136169.6A patent/CN113884793A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4647844A (en) * | 1984-08-03 | 1987-03-03 | Cooper Industries, Inc. | Method and apparatus for testing shielded cable assemblies |
| WO2009034620A1 (en) * | 2007-09-11 | 2009-03-19 | Advantest Corporation | Connector, conductive member, its manufacturing method, performance board, and testing device |
| JP2011106859A (en) * | 2009-11-13 | 2011-06-02 | Mitsubishi Electric Corp | Circuit and method for evaluating shielding performance, and shield case |
| CN207662970U (en) * | 2017-12-26 | 2018-07-27 | 德尔福派克电气系统有限公司 | A kind of beam shield performance test fixture and test system |
| CN208109955U (en) * | 2018-03-28 | 2018-11-16 | 上海乐来汽车分析测试有限公司 | A kind of shielding properties test macro of Belt connector harness |
| CN211505699U (en) * | 2019-12-11 | 2020-09-15 | 上海电器科学研究院 | Electric automobile connector and shielded cable system's line injection method testing arrangement |
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