CN211505699U - Electric automobile connector and shielded cable system's line injection method testing arrangement - Google Patents
Electric automobile connector and shielded cable system's line injection method testing arrangement Download PDFInfo
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- CN211505699U CN211505699U CN201922229282.3U CN201922229282U CN211505699U CN 211505699 U CN211505699 U CN 211505699U CN 201922229282 U CN201922229282 U CN 201922229282U CN 211505699 U CN211505699 U CN 211505699U
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Abstract
The utility model discloses a line injection method testing arrangement of electric automobile connector and shielding cable system, a serial communication port, including left injection device and right injection device, be equipped with the first hole with the one end joint of connector fixing base in the left injection device, the other end of connector fixing base is equipped with the opening of being connected with connector one end matching, be equipped with the second hole with the one end joint of shielding cable in the right injection device, the top of left injection device is equipped with first adapter, the top of right injection device is equipped with the second adapter, connect through the injection line between first adapter and the second adapter; the connector fixing seat is internally provided with a circuit board connected with one end of the connector, and a second resistor is fixed on the circuit board. The utility model overcomes the problem of shielding cable diameter size has solved connector and shielding cable system assembly surface transfer impedance's test, can solve shielding cable circumference impedance distribution unstability effectively through the circuit board welding.
Description
Technical Field
The utility model relates to a line injection method testing arrangement of electric automobile connector and shielding cable system belongs to car connector and shielding cable system surface transfer impedance detection device technical field.
Background
The automobile shielding cable is formed by using a plurality of strands of bare copper or tinned copper wires as conductors, insulating pvc, isolating core wires by gluing aluminum magnesium wires, weaving tin-plated copper as the outermost layer for isolation, and constructing a pvc sheath, and has the function of avoiding interference signals from entering an inner layer conductor to interfere and reducing the loss of transmission signals.
The automobile shielding cable needs to obtain a lasting and unchangeable balance characteristic, namely, a layer of aluminum foil is additionally arranged outside all core wires for grounding, or a method of weaving a reticular metal wire and adopting a metal film is adopted, and various different modes of single shielding and multi-shielding are provided. Single shield refers to a single shielding mesh or film in which one or more wires may be wrapped. The multi-shielding mode is that a plurality of shielding nets and shielding films are arranged in one cable. Some are used to isolate electromagnetic interference between wires, and some are double-layer shields used to enhance shielding effect. The shielding measures are used for protecting, and the purpose is to create a balanced environment and have good electromagnetic compatibility characteristics. The shielding principle of the automobile shielding cable is to prevent external electromagnetic interference from entering the cable by utilizing the reflection, absorption and cancellation principle of metal to electromagnetic waves, and simultaneously prevent internal signals from radiating and interfering the work of other equipment.
The shielding layer is most commonly a metal mesh braid layer, which is convenient to use and light in weight. In general, the shielding effectiveness of metal mesh braiding increases with increasing braid density and decreases with increasing frequency. The higher the frequency, the greater the absorption loss; at lower frequencies, the absorption loss is small. However, in a low-frequency magnetic field, the shielding effectiveness is also related to the weaving density and the material permeability in addition to the frequency change. The shielding layer of the shielded cable can only play a role of shielding after being grounded. When the cable is operated at low frequencies, the length of which is much shorter than the wavelength, the shielding must be grounded perfectly well in order not to allow current to flow through it. If the grounding is poor, a potential difference is formed between certain two points in the transmission process, so that current flows, interference is caused, and the shielding effectiveness is reduced.
The automobile connector is used for erecting a communication bridge at a blocked position or between independent and non-communicated circuits in a circuit, so that current flows, and the circuit achieves a preset function.
At present, a testing device specially aiming at the surface transfer impedance-line injection method of an electric automobile high-voltage connector and a shielding cable system is not provided, most devices only aim at the surface transfer impedance-line injection method of the shielding cable, and the adopted standard is IEC 62153-4-6, but the shielding effectiveness of the shielding cable and the shielding cable system assembly are considered in the electric automobile, so that external electromagnetic interference is prevented from entering the shielding cable, and internal signals are prevented from radiating out.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the problem of how to improve the shielding effectiveness of connector and shielding cable system assembly when guaranteeing shielding effectiveness of shielding cable self is solved.
In order to solve the technical problems, the technical proposal of the utility model is to provide a wire injection method testing device of an electric automobile connector and a shielded cable system, the device is characterized by comprising a left injection device and a right injection device which are respectively arranged at two ends of an electric automobile connector to be tested and a shielding cable system, wherein a first hole clamped with one end of a connector fixing seat is arranged in the left injection device; the connector fixing seat is internally provided with a circuit board connected with one end of the connector, and a second resistor is fixed on the circuit board.
Preferably, the injection line consists of a plurality of strands of parallel wires; the injection line, the electric automobile connector to be tested and the outer conductor of the shielding cable system form a section of transmission line, and the transmission line is an injection circuit.
Preferably, the first adapter and the second adapter are SMA adapters.
Preferably, the left injection device comprises a left injection device upper cover and a left injection device lower cover, the left injection device upper cover and the left injection device lower cover are fixed together by being vertically overlapped, and the first hole is formed between the left injection device upper cover and the left injection device lower cover; the right injection device comprises a right injection device upper cover and a right injection device lower cover which are fixed together by being vertically overlapped, and the second hole is formed between the right injection device upper cover and the right injection device lower cover.
Preferably, the right injection device and the left injection device are both made of brass; the material of the left injection device and the connection position of the left injection device is brass.
Preferably, the brass material part in the connector fixing seat is fully contacted with the spring piece of the connector and is tightly attached.
Preferably, the test equipment is a network analyzer.
Preferably, a groove for installing a circuit board is arranged in the connector fixing seat; a gap is arranged between the second resistor and the left injection device.
Preferably, the second hole of the right injection device is internally provided with an adjustable-distance elastic pipe fitting for adapting to shielding cables with different diameters.
The utility model can install the shielding cables with various diameters by changing the thickness and the size of the gasket; by manufacturing the injection device of the connector port, the tight connection between the connector and a shielding layer in a shielding cable system can be met; the injection circuit is better connected with the coaxial cable by reserving a mode of installing the SMA adapter in the injection devices at the two ends, so that the reliability welding spot is improved; through the design of reserving the circuit board in the connector port injection device, the matching of the characteristic impedance of the shielded cable is facilitated, and meanwhile, the short circuit between the core and the shielding layer is prevented.
The utility model overcomes the problem of shielding cable diameter size has solved connector and shielding cable system assembly surface transfer impedance's test, can solve shielding cable circumference impedance distribution unstability effectively through the circuit board welding, makes it 360 ring joint. The utility model discloses a testing arrangement is simple and convenient, and is with low costs than three coaxial methods test.
Drawings
FIG. 1 is a schematic diagram of an external structure of a cable injection testing apparatus for an electric vehicle connector and a shielded cable system;
fig. 2 is a schematic diagram of an internal structure of a testing apparatus for testing a connector and a shielded cable system of an electric vehicle by a wire injection method.
Wherein: 1 is an upper cover of a left injection device; 2 is a lower cover of the left injection device; 3 is a connector fixing seat; 4 is a first screw; 5 is the upper cover of the right injection device; 6 is a lower cover of the right injection device; 7 is a second screw; 8 is a first adapter; 9 is a third screw; 10 is a second adapter; 11 is an elastic pipe fitting with adjustable spacing.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The utility model relates to a line injection method testing arrangement of electric automobile connector and shielding cable system, as shown in fig. 1, it includes a set of shielding cable part injection device (right injection device promptly), a set of connector port injection device (left injection device promptly), multiunit gasket (can transfer interval elasticity pipe fitting 11). The right injection device and the left injection device are made of brass. The surface transfer impedance of the shielding cable is tested by a line injection method, and the testing device for the surface transfer impedance-line injection method of the high-voltage connector and the shielding cable system is innovated and is suitable for the high-voltage connector and the shielding cable system of the electric automobile.
As shown in fig. 1 and 2, the utility model discloses a left injection device and right injection device that locate the electric automobile connector that awaits measuring and shield cable system both ends respectively, be equipped with the first hole with the one end joint of connector fixing base 3 in the left injection device, the other end of connector fixing base 3 is equipped with the opening of being connected with connector one end matching, be equipped with the second hole with the one end joint of shielding cable in the right injection device, the top of left injection device is equipped with the first adapter 8 that is connected with test equipment through coaxial cable, the top of right injection device is equipped with the second adapter 10 that conveniently links to each other with first resistance, connect through hugging closely the injection line of the electric automobile connector that awaits measuring and shield cable system between first adapter 8 and the second adapter 10; a circuit board connected with one end of the connector is arranged in the connector fixing seat 3, and a second resistor is fixed on the circuit board.
The left injection device comprises a left injection device upper cover 1 and a left injection device lower cover 2, the left injection device upper cover 1 and the left injection device lower cover 2 are fixed together through being overlapped up and down and are fixedly connected through a second screw 7, and a first hole is formed between the left injection device upper cover 1 and the left injection device lower cover 2;
the right injection device comprises a right injection device upper cover 5 and a right injection device lower cover 6, the right injection device upper cover 5 and the right injection device lower cover 6 are fixedly overlapped up and down and are fixedly connected through a first screw 4, and a second hole is formed between the right injection device upper cover 5 and the right injection device lower cover 6. The right injection device made of brass is guaranteed to be tightly attached to the shielding cable, and the shielding effect is achieved. Wherein, to the diameter size nonconformity of shielding cable, can take the 11 modes of adjustable interval elastic tube spare of multiple thickness to reach the effect. Namely, the adjustable-distance elastic tube 11 can be applied to various shielding cables with different diameters.
There will be a recess of reserving in connector fixing base 3 and be used for the installation circuit board, and the second resistance of welded circuit board can not contact injection device, and the size of a dimension that high voltage connector will be satisfied to the one end of connector fixing base 3 simultaneously, and wherein the inside brass material of connector fixing base 3 needs and the spring leaf of connector fully contacts, closely laminates, can not excessively extrusion deformation or excessively loose, can not destroy the shielding efficiency of spring leaf promptly.
The utility model discloses use electric automobile high voltage connector and shielding cable system as an example, will prepare sample (fixed connector and shielding cable together promptly) both ends installation respective injection device, injection circuit is one section transmission line that constitutes with stranded parallel wire and connector and surveyed the outer conductor of shielding cable system. The two ends of the injection circuit are connected through a first adapter 8 and a second adapter 10, and the first adapter 8 and the second adapter 10 are SMA adapters. The injection device for clamping the shielding cable is a right injection device and comprises a right injection device upper cover 5 and a right injection device lower cover 6, the shielding cable is placed on the right injection device upper cover 5 after being subjected to sheath removal, the right injection device upper cover 5 and the right injection device lower cover 6 are tightly connected through a first screw 4, and the thickness of the shielding cable can be adjusted by adopting an elastic pipe fitting 11 with adjustable intervals due to the difference of the diameter size of the shielding cable. The high-voltage connector port is clamped to be a connector fixing seat 3, an injection device for clamping the connector fixing seat 3 is a left injection device, the left injection device comprises a left injection device upper cover 1 and a left injection device lower cover 2, the high-voltage connector is inserted into the connector fixing seat 3 and can be fixed through a third screw 9, the left injection device upper cover 1 and the left injection device lower cover 2 can be connected through a second screw 7, a position installation circuit board is reserved in the connector fixing seat 3, the purpose of the circuit board is to weld the characteristic impedance of a shielding cable, and the resistance of the circuit board cannot contact the injection device. The injection line should be flush against the high voltage connector and the horizontal surface of the shielded cable system under test along the coupling length.
Claims (9)
1. A line injection method testing device of an electric automobile connector and a shielding cable system is characterized by comprising a left injection device and a right injection device which are respectively arranged at two ends of the electric automobile connector to be tested and the shielding cable system, wherein a first hole clamped with one end of a connector fixing seat (3) is arranged in the left injection device, an opening matched and connected with one end of the connector is arranged at the other end of the connector fixing seat (3), a second hole clamped with one end of the shielding cable is arranged in the right injection device, a first adapter (8) connected with testing equipment through a coaxial cable is arranged at the top of the left injection device, a second adapter (10) conveniently connected with a first resistor is arranged at the top of the right injection device, and the first adapter (8) is connected with the second adapter (10) through an injection line tightly attached to the electric automobile connector to be tested and the shielding cable system; a circuit board connected with one end of the connector is arranged in the connector fixing seat (3), and a second resistor is fixed on the circuit board.
2. The device for testing the wire injection method of the electric vehicle connector and the shielded cable system according to claim 1, wherein the injection wire is composed of a plurality of parallel wires; the injection line, the electric automobile connector to be tested and the outer conductor of the shielding cable system form a section of transmission line, and the transmission line is an injection circuit.
3. The device for testing the wire injection method of the electric vehicle connector and the shielding cable system according to claim 1, wherein the first adapter (8) and the second adapter (10) are SMA adapters.
4. The line injection testing device for the electric vehicle connector and the shielding cable system according to claim 1, wherein the left injection device comprises a left injection device upper cover (1) and a left injection device lower cover (2), the left injection device upper cover (1) and the left injection device lower cover (2) are fixed together by being stacked up and down, and the first hole is formed between the left injection device upper cover (1) and the left injection device lower cover (2); the right injection device comprises a right injection device upper cover (5) and a right injection device lower cover (6), the right injection device upper cover (5) and the right injection device lower cover (6) are fixed together through being vertically overlapped, and the second hole is formed between the right injection device upper cover (5) and the right injection device lower cover (6).
5. The device for testing the wire injection method of the electric vehicle connector and the shielding cable system according to claim 1, wherein the right injection device and the left injection device are made of brass; the material of the left injection device and the connection position of the left injection device is brass.
6. The device for testing the wire injection method of the electric vehicle connector and the shielding cable system according to claim 5, wherein the brass material part in the connector holder (3) is in full contact with and closely attached to the spring plate of the connector.
7. The device for testing the wire injection method of the electric vehicle connector and the shielded cable system according to claim 1, wherein the testing equipment is a network analyzer.
8. The device for testing the wire injection method of the electric vehicle connector and the shielding cable system according to claim 1, wherein a groove for mounting a circuit board is formed in the connector holder (3); a gap is arranged between the second resistor and the left injection device.
9. The cable injection testing device of the electric vehicle connector and the shielding cable system according to claim 1, wherein the second hole of the right injection device is provided with an adjustable-distance elastic tube (11) for adapting to shielding cables with different diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229282.3U CN211505699U (en) | 2019-12-11 | 2019-12-11 | Electric automobile connector and shielded cable system's line injection method testing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922229282.3U CN211505699U (en) | 2019-12-11 | 2019-12-11 | Electric automobile connector and shielded cable system's line injection method testing arrangement |
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| CN211505699U true CN211505699U (en) | 2020-09-15 |
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| CN201922229282.3U Active CN211505699U (en) | 2019-12-11 | 2019-12-11 | Electric automobile connector and shielded cable system's line injection method testing arrangement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113655293A (en) * | 2021-08-16 | 2021-11-16 | 哈尔滨工业大学 | Coaxial connector electromagnetic shielding effectiveness testing device |
| CN113884793A (en) * | 2021-09-27 | 2022-01-04 | 中国汽车工程研究院股份有限公司 | Universal cable shielding performance test system and test method thereof |
| CN114485757A (en) * | 2021-12-15 | 2022-05-13 | 航天科工防御技术研究试验中心 | Test system and method for temperature and humidity sensor |
| CN114755500A (en) * | 2022-04-07 | 2022-07-15 | 苏州信科检测技术有限公司 | Connector shielding effectiveness testing device and method |
-
2019
- 2019-12-11 CN CN201922229282.3U patent/CN211505699U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113655293A (en) * | 2021-08-16 | 2021-11-16 | 哈尔滨工业大学 | Coaxial connector electromagnetic shielding effectiveness testing device |
| CN113884793A (en) * | 2021-09-27 | 2022-01-04 | 中国汽车工程研究院股份有限公司 | Universal cable shielding performance test system and test method thereof |
| CN114485757A (en) * | 2021-12-15 | 2022-05-13 | 航天科工防御技术研究试验中心 | Test system and method for temperature and humidity sensor |
| CN114755500A (en) * | 2022-04-07 | 2022-07-15 | 苏州信科检测技术有限公司 | Connector shielding effectiveness testing device and method |
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