Conductive wire harness injection sensitivity checking device

Abstract

A conduction wire harness injection sensitivity checking device comprises a metal positioning plate, an N-Type connector is arranged on the metal positioning plate, one end of the N-Type connector is connected with a load resistor, the other end of the N-Type connector is connected with the end of a metal conductive rod, and the end, away from the N-Type connector, of the metal conductive rod is connected with a radio frequency voltage display device. The periphery of the metal conductive rod is slidably connected with an insulating tube. According to the utility model, the copper rod simulates a cable bundle and is sleeved with the plastic pipe, and the current injection clamp injects current into the copper rod through coupling, so that data deviation caused by direct contact with the copper rod is avoided; an attenuator, a detection amplifier, a display and a built-in power supply are adopted to form a radio frequency voltage display device which is used for simulating an EUT to directly display an injection current level value, external equipment is not needed, and the checking reliability is improved; the metal positioning plate, the metal conductive rod and the radio frequency voltage display device are in pluggable connection through banana plugs, disassembly, assembly and transportation are facilitated, and meanwhile the possibility of damage caused in the transportation process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic compatibility testing, and in particular to a device for verifying the injection sensitivity of conductive wire harnesses. Background Technology

[0002] The large current injection (BCI) method is a test method specified in GB / T 33014.4 Road vehicle electrical / electronic components immunity to narrowband radiated electromagnetic energy. This method simulates electromagnetic interference in the actual use environment by directly injecting current into the cable bundle of the device under test, in order to verify whether the device can maintain normal operation when subjected to interference.

[0003] The CS114 cable bundle injection sensitivity test is a test method specified in military standards such as GJB151B. It aims to simulate electromagnetic interference situations that may be encountered in actual use by injecting specific electromagnetic interference signals into the cable bundle, so as to ensure the normal operation of the equipment under these interferences.

[0004] Both methods described above involve injecting interference level signals using a current injection clamp. When injecting the product with the level required by the standard, calibration is required first. Once the calibration reaches the required level, the output power of the power amplifier is recorded. During testing, the software only needs to control the power amplifier output to reach the power recorded during calibration to be considered as meeting the standard's required level.

[0005] Calibration requires dedicated calibration fixtures and spectrum analyzers. However, during verification, especially external proficiency testing and comparison verification, if calibration fixtures and spectrum analyzers are used as standards, the original manufacturers of calibration fixtures may only design the size to fit their own current injection clamps, which may make it impossible to use current injection clamps from certain laboratory brands.

[0006] Furthermore, spectrum analyzers are precision instruments, and if they are constantly transported externally via express delivery, the condition of the equipment may change or even be damaged, affecting the test results.

[0007] In addition, the calibration fixture is semi-enclosed and can only accommodate the current injection clamp. It does not have the ability to achieve the distance of 50mm or 150mm between the current injection clamp and the EUT during actual testing. It cannot meet the verification requirements and the arrangement is different from that during actual testing. The resulting error may also be one of the reasons for the difference in EUT phenomena during testing in different laboratories.

[0008] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a conductive harness injection sensitivity verification device to solve the above problems.

[0009] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0010] To overcome the shortcomings of the prior art, the present invention discloses a conductive harness injection sensitivity verification device, which solves the problems of inconsistent current injection clamps in different laboratories leading to non-universal calibration fixtures and limited calibration fixture size, making it impossible to conduct tests at distances such as 50mm or 100mm according to the actual product testing standards during verification; in addition, it also solves the problem that traditional conductive harness injection sensitivity verification devices use spectrum analyzers, which are prone to test errors due to the impact of bumps on internal components during long-term transportation, and cannot meet the requirements of portability.

[0011] This utility model discloses a conductive harness injection sensitivity verification device, including a metal positioning plate. The metal positioning plate is provided with an N-Type connector. One end of the N-Type connector is connected to a load resistor, and the other end is connected to the end of a metal conductive rod. The end of the metal conductive rod away from the N-Type connector is connected to an RF voltage display device, which can simulate the EUT to directly display the injection current level value. An insulating tube is slidably connected to the outer periphery of the metal conductive rod. The insulating tube can prevent the current injection clamp from directly contacting the metal conductive rod, thus avoiding data deviation.

[0012] Preferred technical solution: The N-Type connector and the metal conductive rod are connected by a first banana plug for easy assembly and disassembly.

[0013] Preferred technical solution: The metal conductive rod and the radio frequency voltage display device are connected by a second banana plug for easy assembly and disassembly.

[0014] Preferred technical solution: The RF voltage display device includes an attenuator, a detector amplifier, a display, and a built-in power supply. The signal input terminal of the attenuator is connected to the second banana plug, the signal output terminal of the attenuator is connected to the signal input terminal of the detector amplifier, the signal output terminal of the detector amplifier is connected to the signal input terminal of the display, and the attenuator, detector amplifier, and display are electrically connected to the built-in power supply through switches, so that it can accurately display the level value of the injected current directly, simulating the EUT.

[0015] Preferred technical solution: The radio frequency voltage display device also includes a protective housing, with the attenuator and detector amplifier disposed inside the protective housing, and the display, switch and second banana plug disposed outside the protective housing, so that it is not easily damaged during movement and transportation.

[0016] Preferred technical solution: The metal positioning plate is an L-shaped aluminum plate.

[0017] Preferred technical solution: The insulating tube is a plastic tube.

[0018] Preferred technical solution: The load resistor has a resistance of 50Ω.

[0019] Preferred technical solution: The metal conductive rod is a copper rod.

[0020] Preferred technical solution: The diameter of the metal conductive rod is 5mm and the length is 1000mm.

[0021] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0022] This invention discloses a conductive wire harness injection sensitivity verification device. It uses a copper rod to simulate a cable harness, with a plastic tube surrounding it. A current injection clamp injects current into the copper rod via coupling, avoiding direct contact and preventing data deviation. An attenuator, detector amplifier, display, and built-in power supply form an RF voltage display device to directly display the injected current level, simulating the EUT (Electronic Under Test). This eliminates the need for external equipment, reducing measurement uncertainty introduced by other devices during verification and improving verification reliability. The metal positioning plate, metal conductive rod, and RF voltage display device are connected via a banana plug for easy disassembly and transportation, reducing the possibility of damage during transport. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a conductive wire harness injection sensitivity verification device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the assembly of the metal positioning plate and the N-Type connector in this utility model.

[0026] In the above attached diagrams, 1 is a metal positioning plate; 2 is an N-Type connector; 3 is a load resistor; 4 is a metal conductive rod; 5 is an RF voltage display device; 51 is an attenuator; 52 is a detector amplifier; 53 is a display; 54 is a built-in power supply; 55 is a switch; 56 is a protective housing; 6 is an insulating tube; 7 is a first banana plug; and 8 is a second banana plug. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0031] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Example:

[0034] like Figure 1 As shown, this utility model discloses a conductive harness injection sensitivity verification device, including a metal positioning plate 1, an N-Type connector 2, a load resistor 3, a metal conductive rod 4, an RF voltage display device 5, and an insulating tube 6. The main components of this utility model will be described in detail below:

[0035] like Figure 1 and Figure 2 As shown, the metal positioning plate 1 is an L-shaped aluminum plate.

[0036] like Figure 1 and Figure 2 As shown, N-Type connector 2 is fixed to the L-shaped aluminum plate.

[0037] like Figure 1 and Figure 2 As shown, the load resistor 3 has a resistance of 50Ω and is connected to one end of the N-Type connector 2.

[0038] like Figure 1 and Figure 2 As shown, the metal conductive rod 4 is a copper rod with a diameter of 5mm and a length of 1000mm. One end of the copper rod is plugged into the end of the N-Type connector 2 away from the load resistor 3 via the first banana plug 7.

[0039] like Figure 1 and Figure 2 As shown, the radio frequency voltage display device 5 includes an attenuator 51, a detector amplifier 52, a display 53, and a built-in power supply 54. The signal input terminal of the attenuator 51 is connected to the second banana plug 8, the signal output terminal of the attenuator 51 is connected to the signal input terminal of the detector amplifier 52, the signal output terminal of the detector amplifier 52 is connected to the signal input terminal of the display 53, and the attenuator 51, the detector amplifier 52, and the display 53 are electrically connected to the built-in power supply 54 through a switch 55. The second banana plug 8 is plugged into the end of the copper rod away from the L-shaped aluminum plate.

[0040] like Figure 1 As shown, the insulating tube 6 is a plastic tube, which is sleeved on the outer circumference of the copper rod and slidably connected to the copper rod.

[0041] refer to Figure 1 and Figure 2As shown, the usage method and principle of this utility model are as follows: Before use, place the metal positioning plate 1 on the test bench, connect the load resistor 3 to one end of the N-Type connector 2, and connect the other end of the N-Type connector 2 to the metal conductive rod 4 through the first banana plug 7. Sleeve the insulating tube 6 around the outer circumference of the metal conductive rod 4, and then connect the other end of the metal conductive rod 4 to the radio frequency voltage display device 5 through the second banana plug 8. Finally, turn on the switch 55 to perform verification and testing.

[0042] During testing, a 1000mm long copper rod can simulate different distances between the actual test current injection clamp and the product under test. A plastic tube is fitted on the copper rod, and the current injection clamp injects current into the copper rod through coupling, which can avoid data deviation caused by direct contact between the current injection clamp and the copper rod.

[0043] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for verifying the sensitivity of conductive wire harness injection, characterized in that: It includes a metal positioning plate (1), on which an N-Type connector (2) is provided. One end of the N-Type connector (2) is connected to a load resistor (3), and the other end is connected to the end of a metal conductive rod (4). The end of the metal conductive rod (4) away from the N-Type connector (2) is connected to a radio frequency voltage display device (5), and an insulating tube (6) is slidably connected to the outer periphery of the metal conductive rod (4).

2. The conductive harness injection sensitivity verification device according to claim 1, characterized in that: The N-Type connector (2) and the metal conductive rod (4) are connected by a first banana plug (7).

3. The conductive harness injection sensitivity verification device according to claim 2, characterized in that: The metal conductive rod (4) and the radio frequency voltage display device (5) are connected by a second banana plug (8).

4. The conductive harness injection sensitivity verification device according to claim 3, characterized in that: The radio frequency voltage display device (5) includes an attenuator (51), a detector amplifier (52), a display (53), and a built-in power supply (54). The signal input terminal of the attenuator (51) is connected to the second banana plug (8), the signal output terminal of the attenuator (51) is connected to the signal input terminal of the detector amplifier (52), the signal output terminal of the detector amplifier (52) is connected to the signal input terminal of the display (53), and the attenuator (51), the detector amplifier (52), and the display (53) are electrically connected to the built-in power supply (54) through a switch (55).

5. The conductive harness injection sensitivity verification device according to claim 4, characterized in that: The radio frequency voltage display device (5) also includes a protective housing (56), the attenuator (51) and the detector amplifier (52) are disposed inside the protective housing (56), and the display (53), the switch (55) and the second banana plug (8) are disposed outside the protective housing (56).

6. The conductive harness injection sensitivity verification device according to claim 1, characterized in that: The metal positioning plate (1) is an L-shaped aluminum plate.

7. The conductive harness injection sensitivity verification device according to claim 1, characterized in that: The insulating tube (6) is a plastic tube.

8. The conductive harness injection sensitivity verification device according to claim 1, characterized in that: The resistance of the load resistor (3) is 50Ω.

9. The conductive harness injection sensitivity verification device according to claim 1, characterized in that: The metal conductive rod (4) is a copper rod.

10. The conductive harness injection sensitivity verification device according to claim 9, characterized in that: The metal conductive rod (4) has a diameter of 5 mm and a length of 1000 mm.

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