CN109521278B - Test tool and method for resistance of inner conductor and outer conductor of coaxial cable - Google Patents
Test tool and method for resistance of inner conductor and outer conductor of coaxial cable Download PDFInfo
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- CN109521278B CN109521278B CN201810788912.8A CN201810788912A CN109521278B CN 109521278 B CN109521278 B CN 109521278B CN 201810788912 A CN201810788912 A CN 201810788912A CN 109521278 B CN109521278 B CN 109521278B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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Abstract
The invention discloses a test tool for the resistance of inner and outer conductors of a coaxial cable, which comprises a shell, wherein a test device is arranged on the shell and comprises a switch button, a test positive electrode interface, a test negative electrode interface and a connecting port, the switch button is arranged at the upper end of the shell and is electrically connected with the test positive electrode interface, the test negative electrode interface and the connecting port, the test positive electrode interface and the test negative electrode interface are respectively arranged at two sides of the shell, the test positive electrode interface and the test negative electrode interface are arranged in a symmetrical structure, and the connecting port is respectively arranged at one side of the shell.
Description
Technical Field
The invention relates to the field of cable testing, in particular to a testing tool and a testing method for inner and outer conductor resistance of a coaxial cable.
Background
Coaxial cables are being adopted on a large scale as radio frequency transmission lines, and the application of coaxial cables for transmitting direct current is more and more extensive, so that the coaxial cables are required to have good radio frequency transmission performance and better direct current conduction capability, and the test of the direct current conduction capability is mainly reflected in the test of direct current resistances of inner conductors and outer conductors of the coaxial cables, and the existing test tool directly tests the resistances of the inner conductors and the outer conductors by using an ohmic level of a multimeter, so that the following problems can be caused:
1. when testing the outer conductor, the stylus needs to contact the outer conductor of the cable connector, which is difficult for connectors with plastic housings;
2. when the inner conductor is tested, the inner conductor needs to be extended out, so that a meter pen can conveniently contact, and the contact is unreliable;
3. the resistance of the inner conductor and the outer conductor cannot be measured simultaneously;
4. the testing accuracy is not sufficient, the ohm grade of many multimeters is 0.01ohm accuracy, and the resistance of the inner conductor and the outer conductor of the cable is in the milliohm level.
Disclosure of Invention
The invention aims to provide a test tool for the resistance of inner and outer conductors of a coaxial cable, which can test the resistance of the inner and outer conductors of a coaxial wire harness quickly, accurately and reliably, can be compatible with a double-port wire harness of any male and female connector, and can measure the resistance of the inner conductor or the resistance of the outer conductor at the same time.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a test fixture of coaxial cable inner and outer conductor resistance, includes the casing, is located be equipped with testing arrangement on the casing, testing arrangement includes shift knob, test positive pole interface, test negative pole interface and connection port, shift knob sets up in the casing upper end, and is connected with test positive pole interface, test negative pole interface and connection port looks electricity, test positive pole interface and test negative pole interface are located the casing both sides respectively, just test positive pole interface and test negative pole interface are symmetrical structure setting, connection port is located one side of casing respectively.
Further, the switch button includes an inner conductor test switch and an outer conductor test switch.
Further, the connection port comprises a first test port and a second test port, and the first test port and the second test port are electrically connected with the inner conductor test switch and the outer conductor test switch.
Further, the testing positive interface is provided with a positive current interface and a positive voltage interface, and the testing negative interface is provided with a negative current interface and a negative voltage interface.
Further, the first test port comprises a first male end and a first female end, the first male end and the first female end form a loop through the inner conductor test switch or the outer conductor test switch, the second test port comprises a second male end and a second female end, and the second male end and the second female end form a loop through the inner conductor test switch or the outer conductor test switch.
A method for testing the resistance of an inner conductor and an outer conductor of a coaxial cable is characterized by comprising the following steps:
firstly, calibrating, namely connecting a calibration joint on a connecting port, connecting a 1A current on a test tool, and finally returning a voltmeter test value to zero;
connecting the connectors at two ends of the cable with ports at two sides of the tool respectively according to corresponding connector polarities, then electrifying the 1A current, and finally checking the read value of the test voltmeter, namely the voltage value of the tested piece;
step three, testing the inner conductor or the outer conductor of the tool as required to toggle the switch button, so as to selectively test the inner conductor or the outer conductor
Compared with the prior art, the invention has the advantages that:
the test tool for the resistance of the inner conductor and the outer conductor of the coaxial cable can test the resistance of the inner conductor and the outer conductor of the coaxial wire harness quickly, accurately and reliably, can be compatible with a double-port wire harness of any male-female connector, and can measure the resistance of the inner conductor or the resistance of the outer conductor at the same time.
Drawings
Fig. 1 is a schematic structural diagram of a tester for resistance of inner and outer conductors of a coaxial cable in embodiment 1.
Fig. 2 is a schematic diagram of the internal circuit of a tester for the resistance of the inner conductor and the outer conductor of the coaxial cable in embodiment 1.
The corresponding names of the components in the figure are as follows: the testing device comprises a shell 1, a testing device 2, a switch button 3, a testing positive electrode interface 4, a testing negative electrode interface 5, a connecting port 6, an inner conductor testing switch 7, an outer conductor testing switch 8, a first testing port 9, a second testing port 10, a positive electrode current interface 11, a positive electrode voltage interface 12, a negative electrode current interface 13, a negative electrode voltage interface 14, a first male end 15, a first female end 16, a second male end 17 and a second female end 18.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 2, the technical solution adopted by the present invention to solve the above technical problems is: a test tool for testing the resistance of inner and outer conductors of a coaxial cable comprises a shell 1, a test device 2 is arranged on the shell 1, the test device 2 comprises a switch button 3, a test positive electrode interface 4, a test negative electrode interface 5 and a connection port 6, the switch button 3 is arranged at the upper end of the shell 1 and is electrically connected with the test positive electrode interface 4, the test negative electrode interface 5 and the connection port 6, the test positive electrode interface 4 and the test negative electrode interface 5 are respectively arranged at two sides of the shell 1, the test positive electrode interface 4 and the test negative electrode interface 5 are arranged in a symmetrical structure, the connection port 6 is respectively arranged at one side of the shell 1, the switch button 3 comprises an inner conductor test switch 7 and an outer conductor test switch 8, the connection port 6 comprises a first test port 9 and a second test port 10, the first test port 9 and the second test port 10 are both electrically connected with the inner conductor test switch 7 and the outer conductor test switch 8, be equipped with anodal current interface 11 and anodal voltage interface 12 on the positive interface 4 of test, test negative pole interface 5 is equipped with negative current interface 13 and negative voltage interface 14, first test port 9 includes first public end 15 and first female end 16, first public end 15, first female end 16 make it form a return circuit through inner conductor test switch 7 or outer conductor test switch 8, second test port 10 includes public end 17 of second and the female end 18 of second, public end 17 of second, the female end 18 of second make it form a return circuit through inner conductor test switch 7 or outer conductor test switch 8.
The test tool for the resistance of the inner conductor and the outer conductor of the coaxial cable can test the resistance of the inner conductor and the outer conductor of the coaxial wire harness quickly, accurately and reliably, can be compatible with a double-port wire harness of any male-female connector, and can measure the resistance of the inner conductor or the resistance of the outer conductor at the same time.
The invention has the following tool principle that a 1A current is provided for a test link, so that a resistance test can be converted into a voltage test according to ohm's law, and when the current I is 1A, the actually measured voltage value, namely the resistance value R is U/I is U;
the two sides of the test fixture are respectively provided with a first male end 15, a first female end 16, a second male end 17 and a second female end 18, the first male end 15 and the first female end 16 as well as the second male end 17 and the second female end 18 are connecting ports 6 with different models, so that cables assembled with different male and female connectors can be tested, the inner conductor test switch 7 and the outer conductor test switch 8 in the middle of the shell 1 can control the path of current, and the inner conductor test switch 7 or the outer conductor test switch 8 can be selected according to the resistance of a test conductor or the resistance of an outer conductor, wherein the method for testing the resistance of the inner conductor and the outer conductor of the coaxial cable comprises the following steps:
firstly, calibrating, namely connecting a calibration joint on a connecting port 6, then connecting a current of 1A to a test tool, and finally returning a voltmeter test value to zero;
connecting the connectors at two ends of the cable with ports at two sides of the tool respectively according to corresponding connector polarities, then electrifying the 1A current, and finally checking the read value of the test voltmeter, namely the voltage value of the tested piece;
and step three, testing the inner conductor or the outer conductor of the tool as required to toggle the switch button 3, so as to select to test the inner conductor or the outer conductor.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. The test tool for the inner conductor resistance and the outer conductor resistance of the coaxial cable is characterized by comprising a shell (1), wherein a test device (2) is arranged on the shell (1), the test device (2) comprises a switch button (3), a test positive electrode interface (4), a test negative electrode interface (5) and a connecting port (6), the switch button (3) is arranged at the upper end of the shell (1) and is electrically connected with the test positive electrode interface (4), the test negative electrode interface (5) and the connecting port (6), the test positive electrode interface (4) and the test negative electrode interface (5) are respectively arranged at two sides of the shell (1), the test positive electrode interface (4) and the test negative electrode interface (5) are arranged in a symmetrical structure, and the connecting port (6) is respectively arranged at one side of the shell (1);
the switch button (3) comprises an inner conductor test switch (7) and an outer conductor test switch (8);
the connecting port (6) comprises a first testing port (9) and a second testing port (10), and the first testing port (9) and the second testing port (10) are electrically connected with the inner conductor testing switch (7) and the outer conductor testing switch (8);
the first test port (9) comprises a first male end (15) and a first female end (16), the first male end (15) and the first female end (16) are enabled to form a loop through the inner conductor test switch (7) or the outer conductor test switch (8), the second test port (10) comprises a second male end (17) and a second female end (18), and the second male end (17) and the second female end (18) are enabled to form a loop through the inner conductor test switch (7) or the outer conductor test switch (8).
2. The test tool for the resistance of the inner conductor and the outer conductor of the coaxial cable according to claim 1, wherein a positive electrode current interface (11) and a positive electrode voltage interface (12) are arranged on the positive test interface (4), and a negative electrode current interface (13) and a negative electrode voltage interface (14) are arranged on the negative test interface (5).
3. A test method of a test tool for testing the resistance of inner and outer conductors of a coaxial cable is characterized in that the test method is implemented in the test tool for testing the resistance of the inner and outer conductors of the coaxial cable disclosed in claim 1 or 2, and comprises the following steps:
firstly, calibrating, namely connecting a calibration joint on a connecting port (6), then connecting a current of 1A to a test tool, and finally returning a voltmeter test value to zero;
connecting the connectors at two ends of the cable with ports at two sides of the tool respectively according to corresponding connector polarities, then electrifying the 1A current, and finally checking the read value of the test voltmeter, namely the voltage value of the tested piece;
and step three, testing the inner conductor or the outer conductor of the tool as required to toggle the switch button (3), so that the inner conductor or the outer conductor is selected to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810788912.8A CN109521278B (en) | 2018-07-18 | 2018-07-18 | Test tool and method for resistance of inner conductor and outer conductor of coaxial cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810788912.8A CN109521278B (en) | 2018-07-18 | 2018-07-18 | Test tool and method for resistance of inner conductor and outer conductor of coaxial cable |
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| CN109521278A CN109521278A (en) | 2019-03-26 |
| CN109521278B true CN109521278B (en) | 2021-04-16 |
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| CN111830307A (en) * | 2020-06-05 | 2020-10-27 | 东风柳州汽车有限公司 | Power supply detection interface device of direct current load equipment |
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| CN103543342A (en) * | 2012-07-10 | 2014-01-29 | 中国兵器工业新技术推广研究所 | Method and system for testing shielding performance of cable |
| US9651576B2 (en) * | 2013-10-17 | 2017-05-16 | Thermo Keytek LLC | Low-side coaxial current probe |
| JP6455451B2 (en) * | 2015-03-24 | 2019-01-23 | 三菱電機株式会社 | Coaxial probe |
| CN107817375A (en) * | 2017-10-30 | 2018-03-20 | 中国舰船研究设计中心 | Coaxial wire internal electromagnetic pulse coupled voltages test device |
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| CN1570658A (en) * | 2003-07-24 | 2005-01-26 | 祖金德 | Device for measuring insulation resistance |
| CN103675450A (en) * | 2012-09-07 | 2014-03-26 | 成都默一科技有限公司 | Conductor resistance testing device |
| CN103777078A (en) * | 2012-10-19 | 2014-05-07 | 远东电缆有限公司 | Cable conductor DC-resistance testing device and testing method |
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