A tri-cored utp cable, a tri-cored utp harness and a camera module

Abstract

The application discloses a three-core UTP cable, a three-core UTP wire harness and a camera module, comprising a differential signal line pair, a ground signal line, a filler and an outer insulation layer, the outer insulation layer wrapping the differential signal line pair, the ground signal line and the filler, and the filler being located between the differential signal line pair, the ground signal line and the outer insulation layer; the differential signal line pair comprises a first differential signal line and a second differential signal line, and the first differential signal line and the second differential signal line are twisted by a double-twisted wire structure; and the differential signal line pair and the ground signal line are arranged at intervals. The application provides a more stable and reliable grounding path, can effectively conduct electrostatic charges, avoids accumulation of static electricity on the camera module, and can effectively solve the ESD failure problem of the camera module based on the UTP wire harness.

Description

Technical Field

[0001] This application relates to the field of camera modules, and mainly to a three-core UTP cable, a three-core UTP harness, and a camera module. Background Technology

[0002] With the rapid development of new energy, the level of vehicle intelligence is increasing day by day. Among them, the demand for camera modules in intelligent driving and intelligent cockpit solutions is growing rapidly. As a result, automotive applications are placing more demands on the design of module wiring harnesses.

[0003] Existing modules often use STP harnesses to transmit differential signals. To reduce the complexity and cost of harness manufacturing, UTP harnesses are now widely used instead of STP. However, because UTP harnesses reduce the metal shielding mesh, camera modules equipped with UTP harnesses are highly susceptible to wiring failure during ESD testing. Utility Model Content

[0004] One objective of this application is to provide a more stable and reliable grounding path that can effectively conduct static charge and prevent static electricity from accumulating on the camera module, thereby effectively solving the ESD failure problem of camera modules based on UTP harnesses.

[0005] Another objective of this application is to effectively reduce the process complexity and cost of wire harnesses and interfaces.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a three-core UTP cable, comprising differential signal pairs, ground signal lines, filler, and an outer insulation layer, wherein the outer insulation layer encloses the differential signal pairs, ground signal lines, and filler, and the filler is located between the differential signal pairs, the ground signal lines, and the outer insulation layer; the differential signal pairs include a first differential signal line and a second differential signal line, wherein the first differential signal line and the second differential signal line are twisted together using a twisted pair structure; the differential signal pairs and the ground signal line are spaced apart.

[0007] As a preferred embodiment, the spacing between the ground signal line and the differential signal line pair is not less than the outer diameter of the differential signal line pair.

[0008] As a preferred embodiment, the differential signal line pair includes a first differential signal line and a second differential signal line. The first differential signal line includes a first differential signal core and a first differential signal core insulation layer, with the first differential signal insulation layer enclosing the first differential signal core. The second differential signal line includes a second differential signal core and a second differential signal core insulation layer, with the second differential signal core insulation layer enclosing the second differential signal core. The ground signal line includes a ground signal core and a ground signal core insulation layer, with the ground signal core insulation layer enclosing the ground signal core.

[0009] As a preferred embodiment, the distance between the center points of the first differential signal core and the second differential signal core is D2; the distance between the center point of the ground signal core and the center point of the first differential signal core is M1, and the distance between the center point of the ground signal core and the center point of the second differential signal core is M2; M1≥2D2, M2≥2D2.

[0010] As a preferred embodiment, the radius of the ground signal core is R1, and the radii of the first differential signal core and the second differential signal core are both R2; the distance between the center points of the first differential signal core and the second differential signal core is D2; when the center points of the ground signal core, the first differential signal core, and the second differential signal core are on the same straight line, the distance between the ground signal core and the nearest differential signal core is D1, where D1≥[(2×R2+D2)+R1].

[0011] As a preferred embodiment, a three-core UTP cable harness includes: a three-core UTP cable as described above; a first connector, wherein the differential signal pairs and the ground signal pairs of the three-core UTP cable extend into the first connector respectively, the first connector including a ground terminal and an electrical connection terminal; the ground terminal is connected to the ground signal pairs, and the electrical connection terminal is used for electrical connection with an external connector to realize differential signal transmission and ground connection.

[0012] As a preferred embodiment, the grounding terminal is located on the outside of the first connector housing, and the grounding terminal is a conductor.

[0013] As a preferred embodiment, the first connector includes three pins, which are electrically connected to the first differential signal line, the second differential signal line, and the ground signal line, respectively.

[0014] As a preferred embodiment, an in-vehicle camera module includes: a circuit board including a second connector; a housing, in which the circuit board is disposed; and a three-core UTP wiring harness as described above, wherein the first connector of the three-core UTP wiring harness is electrically connected to the second connector, and the grounding terminal is in conductive contact with the housing to ground the housing.

[0015] As a preferred embodiment, the second connector includes three pins, with the pins of the second connector and the first connector being male and female pins respectively, so that the first connector and the second connector can be electrically connected by mating.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] (1) The vehicle-mounted camera module three-core UTP harness of this application has two differential signal lines and one ground signal line. The differential signal is transmitted through the differential signal line, which provides a more stable and reliable grounding path between the camera module and the domain controller. It can effectively conduct static charge and avoid static electricity accumulation on the camera module. It can effectively solve the ESD failure problem of camera modules based on UTP harnesses.

[0018] (2) The wire harness designed in this application has no additional metal shielding layer, which can effectively reduce the process complexity and cost of the wire harness and interface.

[0019] (3) The wire harness designed in this application is wrapped with an outer insulation layer. Through design optimization, it not only ensures the insulation performance, but also does not affect the impedance characteristics of the wire harness, thereby improving the stability and integrity of signal transmission. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of a three-core UTP cable in an embodiment of this application.

[0021] Figure 2 This is a schematic diagram showing the distance between the ground signal core and the differential signal core in one embodiment of this application.

[0022] Figure 3 This is a schematic diagram showing the distance between the ground signal core and the differential signal core in another embodiment of this application.

[0023] Figure 4 This is a cross-sectional schematic diagram of the camera module in the embodiments of this application.

[0024] Figure 5 This is a flowchart illustrating the application of the three-core UTP harness and camera module in the embodiments of this application.

[0025] Figure 6 This is a flowchart illustrating the application of three-core UTP harnesses in existing technologies.

[0026] In the diagram: 1. Three-core UTP harness; 11. First connector; 111. Electrical connection terminal; 12. Grounding terminal;

[0027] 2. Three-core UTP cable; 21. Differential signal pair; 211. First differential signal line; 2111. First differential signal core; 2112. Insulation layer of first differential signal core; 212. Second differential signal line; 2122. Second differential signal core; 2123. Insulation layer of second differential signal core; 22. Ground signal line; 221. Ground signal core; 222. Insulation layer of ground signal core; 23. Outer insulation layer; 24. Filler;

[0028] 3. Camera module; 31. Housing; 32. Circuit board; 33. Second connector;

[0029] 4. Center line of symmetry. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0034] This application provides a three-core UTP cable 2, such as Figure 1 As shown, the cable includes a differential signal pair 21, a ground signal line 22, a filler 24, and an outer insulation layer 23. Specifically, the outer insulation layer 23 wraps around the differential signal pair 21, the ground signal line 22, and the filler 24. The outer insulation layer 23 is made of flame-retardant insulating material, which is suitable for improving the safety of the three-core UTP cable 2. In addition, the outer insulation layer 23 wraps the differential signal pair 21 and the ground signal line 22 together, which can prevent the cable bundle from becoming loose, thereby improving the installability of the three-core UTP cable 2. The filler 24 is located between the differential signal pair 21, the ground signal line 22, and the outer insulation layer 23. The filler 24 is used to fix the differential signal pair 21 and the ground signal line 22 according to the preset spacing between them, thereby achieving impedance matching of the cable bundle.

[0035] Furthermore, the differential signal line pair 21 includes a first differential signal line 211 and a second differential signal line 212. The first differential signal line 211 and the second differential signal line 212 are twisted together using a twisted pair structure. The ground signal line 22 includes a ground signal core 221 and a ground signal core insulation layer 222. The ground signal core insulation layer 222 wraps around the ground signal core 221. The ground signal core 221 is used to provide a zero potential reference between the automotive camera module 3 and the domain controller ECU. The ground signal core insulation layer 222 is used to prevent short circuits between the ground signal core 221 and other signal lines or signal sources.

[0036] Furthermore, the differential signal pair 21 and the ground signal line 22 are spaced apart, meaning there is a certain distance between them. Compared to conventional technologies that require an additional shielding layer, this spacing provides shielding and interference immunity. By spacing the differential signal pair 21 and the ground signal line 22, the three-core UTP cable 2 of this application avoids interference between the cable bundles, thus eliminating the need for an additional shielding layer and effectively reducing the manufacturing complexity and cost of the three-core UTP cable 2 and its interface.

[0037] It should be understood that the two lines in the differential signal pair 21 carry opposite signals, and any external electromagnetic interference (EMI) will couple to these two lines simultaneously and in equal amounts, thus canceling each other out at the receiving end. Therefore, separating the differential signal pair 21 from the ground signal line 22 can further reduce crosstalk to the differential signal line. Furthermore, compared to the non-separated differential signal pair 21 and ground signal line 22 in conventional technology, the separately configured ground signal line 22 not only effectively avoids interference to the differential signal pair 21, ensuring its normal transmission, but also allows for easier independent connection to an external grounding device, thereby improving the stability and reliability of the entire system.

[0038] Furthermore, the distance between the ground signal line 22 and the differential signal line pair 21 is not less than the outer diameter of the differential signal line pair 21, wherein, for example... Figure 1 As shown, the outer diameter of the differential signal line pair 21 refers to the distance L between the two outer sides, and the spacing distance refers to the distance from the outer side of the ground signal line to the outer side of the differential signal line. This ensures that the differential signal line pair 21 and the ground signal line 22 are effectively spaced apart.

[0039] Furthermore, the first differential signal line 211 includes a first differential signal core 2111 and a first differential signal core insulation layer 2112, with the first differential signal core insulation layer 2112 enclosing the first differential signal core 2111; the second differential signal line 212 includes a second differential signal core 2122 and a second differential signal core insulation layer 2123, with the second differential signal core insulation layer 2123 enclosing the second differential signal core 2122. The first differential signal core 2111 and the second differential signal core 2122 are used to transmit differential signals with the same amplitude but opposite phase. The first differential signal core insulation layer 2112 and the second differential signal core insulation layer 2123 are mainly used to prevent the first differential signal core 2111 and the second differential signal core 2122 from touching and short-circuiting.

[0040] In some embodiments, such as Figure 2 As shown, the distance between the center points of the first differential signal core 2111 and the second differential signal core 2122 is D2; the distance between the center point of the ground signal core 221 and the center point of the first differential signal core 2111 is M1, and the distance between the center point of the ground signal core 221 and the center point of the second differential signal core 2122 is M2; M1≥2D2, M2≥2D2.

[0041] In some embodiments, such as Figure 3 As shown, the radius of the ground signal core 221 is R1, and the radii of the first differential signal core 2111 and the second differential signal core 2122 are both R2. The distance between the center points of the first differential signal core 2111 and the second differential signal core 2122 is D2. When the center of the ground signal core 221, the first differential signal core 2111, and the second differential signal core 2122 are on the same straight line, the distance between the ground signal core 221 and the nearest differential signal core is D1, where D1 ≥ [(2×R2+D2)+R1]. The spacing between the cores of the three-core UTP cable 2 is precisely controlled, which can effectively achieve impedance matching to reduce signal reflection and attenuation. That is, the characteristic impedance of the transmission line is equal to the impedance of the load connected to it. When impedance matching is achieved, the signal transmission efficiency is the highest and the reflection is the lowest. Therefore, precisely controlling the spacing between the cores helps to match the characteristic impedance of the three-core UTP cable 2 with the impedance required by the system.

[0042] It should be understood that the three-core UTP cable 2 is mainly used for transmitting high-speed signals and needs to meet certain impedance matching and interference immunity requirements. The impedance requirement for the differential signal is 100Ω. Since the three-core UTP cable 2 operates in a uniform transmission state, to ensure impedance matching of the differential signal pair 21, the differential signal pair 21 needs to not reference the ground signal line 22 and be unaffected by the current in the ground signal line 22. Therefore, in this application, the distance between the ground signal line 22 and the differential signal pair 21 needs to be more than twice the spacing between the differential signal pair 21. Furthermore, the three-core UTP cable 2 of this application has an insulation layer both inside the wire harness and on the outside surrounding the overall internal wire harness. Through design optimization, insulation performance is ensured without affecting the impedance characteristics of the wire harness, thereby improving the stability and integrity of signal transmission.

[0043] In some embodiments, such as Figure 3 As shown, the differential signal pairs 21 are twisted together, that is, the first differential signal core 2111 and the second differential signal core 2122 are twisted together. Specifically, as... Figure 3 As shown, the first differential signal line 211 and the second differential signal line 212 are twisted in a counterclockwise direction, and the relative positions of the first differential signal line 211 and the second differential signal line 212 are twisted 360 degrees as the three-core UTP cable 2 extends. Figure 3 The solid circle represents the first differential signal core 2111 and the second differential signal core 2122, shown in the first position during the 360-degree twisting process; the dashed circle represents the first differential signal core 2111 and the second differential signal core 2122, shown in the second position after being rotated counterclockwise during the 360-degree twisting process. At this time, the center of the ground signal core 221, the first differential signal core 2111, and the second differential signal core 2122 are on the same straight line, and the distance D1 between the ground signal core 221 and the nearest differential signal core is the shortest distance.

[0044] It is understandable that, since the signals in the first differential signal line 211 and the second differential signal line 212 are opposite, external interference will produce equal and opposite effects on the first differential signal line 211 and the second differential signal line 212, thus canceling each other out at the receiving end and reducing electromagnetic interference (EMI) and radio frequency interference (RFI). Furthermore, by twisting the first differential signal line 211 and the second differential signal line 212, the interference generated by the external electromagnetic field on the twisted pair is consistent on both wires (common-mode interference). Due to the principle of differential transmission, this common-mode interference can be eliminated in the differential circuit, thereby extracting the useful signal (differential-mode signal). By twisting two wires together and using a differential circuit to eliminate common-mode signals, the twisted pair ensures stable and reliable data transmission in various environments.

[0045] In some embodiments, after the three-core UTP cable 2 extends and twists 360 degrees, the positions of the first differential signal line 211 and the second differential signal line 212 relative to the center of symmetry of the differential signal pair remain unchanged, that is, as shown in the figure. Figure 1 As shown, the first differential signal line 211 and the second differential signal line 212 are symmetrically arranged with respect to the symmetry center line 4. Since the first differential signal line 211 and the second differential signal line 212 are symmetrically positioned in space, they are subject to similar external electromagnetic interference. Therefore, at the differential receiving end, these interferences can be canceled by comparing the voltage difference between the two signals. Furthermore, the first differential signal line 211 and the second differential signal line 212 remain in the same position with respect to the symmetry center line 4 after being twisted together, which ensures the consistency and stability of signal transmission, thereby improving signal integrity.

[0046] Furthermore, such as Figure 4 As shown, this application also provides a three-core UTP cable harness 1, including the aforementioned three-core UTP cable 2 and a first connector 11. The first connector 11 is electrically connected to the three-core UTP cable 2. Specifically, the differential signal pair 21 and the ground signal pair 22 of the three-core UTP cable 2 extend into the first connector 11 respectively. The first connector 11 includes a ground terminal 12 and an electrical connection terminal 111. The ground terminal 12 is connected to the ground signal pair 22 extending into the first connector 11, and the electrical connection terminal 111 is electrically connected to an external connector to realize the transmission of differential signals and ground connection.

[0047] It should be understood that the grounding terminal 12 is connected to the ground signal line 22 in the first connector 11, providing a stable and reliable grounding path, further strengthening ESD (electrostatic discharge) protection, thereby enabling the three-core UTP harness 1 to have a stable and reliable grounding path, effectively conducting static charge and preventing static electricity from accumulating on other devices connected to the first connector 11.

[0048] In some embodiments, the grounding terminal 12 on the first connector 11 is located outside the housing of the first connector 11. This application does not impose specific restrictions on the position of the grounding terminal 12.

[0049] In some embodiments, the grounding terminal 12 is a conductor, and the material of the grounding terminal 12 may be copper or corrosion-resistant stainless steel to prevent the grounding terminal 12 from being easily corroded when in an outdoor environment, thereby affecting the grounding effect of the grounding terminal 12. In addition, the material of the grounding terminal 12 may be stainless steel plate (SUS304), and the surface may also be copper plated for use in distribution panels, vehicles, etc. This application does not impose specific limitations on this.

[0050] In some embodiments, the first connector 11 includes three pins, which are electrically connected by crimping to the differential signal pair 21 and the ground signal line 22 extending from the three-core UTP cable 2, so that the three-core UTP cable 2 and the first connector 11 are integrated. The three pins are used for transmitting differential signals and connecting to the ground line, respectively.

[0051] Furthermore, such as Figure 4 As shown, this application also provides a camera module 3, including a circuit board 32 with a second connector 33; a housing 31, in which the circuit board 32 is disposed; a first connector 11 of a three-core UTP harness 1 is electrically connected to the second connector 33; and a grounding terminal 12 on the first connector 11 is in conductive contact with the housing 31 to ground the housing 31. This addresses the problem in conventional UTP wiring schemes where, due to the lack of a fast discharge path in the housing 31 of the camera module, accumulated charge can affect the differential signal through coupling, potentially leading to failure of the camera module 3.

[0052] Furthermore, the second connector 33 includes three pins, and the pins of the second connector 33 and the first connector 11 are male and female pins, respectively, so that the first connector 11 and the second connector 33 can be electrically connected by mating.

[0053] This application also provides a method for installing a three-core UTP cable harness 1 and a camera module 3, such as... Figure 4 and Figure 5 As shown, step S1: Assemble the sensor chip and electronic components (such as resistors, capacitors, transistors, etc.) onto the PCB (circuit board 32) to form a complete PCBA (circuit board 32 assembly). Fix the PCBA to the housing 31 of the camera module 3 using screws or AA method (active alignment technology). Step S2: Solder the second connector 33 onto the PCB (circuit board 32) and connect the ground signal and differential signal within the circuit board 32. Connect the second connector 33 to the first connector 11 of the three-core UTP harness 1 to achieve the connection of the three-core UTP harness 1 with the ground signal and differential signal of the camera module 3. Step S3: Connect the ground terminal 12 on the first connector 11 to the ground signal line 22 inside the first connector 11, and make the ground terminal 12 make conductive contact with the housing 31 of the camera module 3 so that the housing 31 of the camera module 3 is in a grounded state. Step S4: One end of the three-core UTP harness 1 is fixedly connected to the camera module 3, and the other end is connected to the ECU (electronic control unit) and grounded to the car body.

[0054] like Figure 5As shown, the ESD (electrostatic discharge) transmission path of the three-core UTP harness 1 in this application is as follows: the ESD current is transmitted from the housing 31 of the camera module 3 to the ground terminal 12 on the first connector 11, from the ground terminal 12 to the ground signal line 22 in the first connector 11, and then from the ground signal line 22 to the ground terminal of the ECU (electronic control unit) or the vehicle housing, completing the entire ESD (electrostatic discharge) transmission process. The ESD (electrostatic discharge) transmission path of the three-core UTP harness 1 in this application can effectively reduce the impact of static electricity on electronic equipment and improve the reliability and safety of the system.

[0055] It should be understood that the three-core UTP cable 2 includes two differential signal lines for transmitting differential signals and one ground signal line 22 for grounding. This provides a more stable and reliable grounding path between the camera module 3 and the domain controller, effectively conducting static charge and preventing static electricity accumulation on the camera module 3. This can effectively solve the ESD failure problem of the camera module 3 based on the UTP cable harness.

[0056] Compared to Figure 6 As shown, in conventional UTP wiring schemes, because the housing 31 of the camera module 3 lacks a fast discharge path, the accumulated charge can affect the differential signal through coupling, leading to a risk of failure for the camera module 3. The three-core UTP harness 1 of this application has an additional ground signal line 22, and this ground signal line 22 can be electrically connected to the housing 31 of the camera module 3 through the ground terminal 12. Compared to the differential signal line, the path between the housing 31 of the camera module 3 and the ground signal line 22 in the three-core UTP harness 1 can be considered a low-impedance path. When the ESD discharge gun or other ESD release source discharges on the housing 31 of the camera module 3, a large amount of charge accumulated on the housing 31 of the camera module 3 will choose a low-impedance path for transfer, thereby quickly dissipating from the housing 31 of the camera module 3 to the ECU or the vehicle housing. The ESD transmission path is as follows: Figure 5 As shown, the three-core UTP harness 1 solution of this application can effectively solve the ESD failure problem that occurs when using ordinary UTP harness modules.

[0057] In some embodiments, the outer insulation layer 23, the first differential signal core insulation layer 2112, the second differential signal core insulation layer 2123, and the ground signal core insulation layer 222 are any one or a mixture of two of the following materials: polyethylene, polypropylene, perfluoroethylene propylene, foamed polyethylene, foamed perfluoroethylene propylene, and polytetrafluoroethylene. This application does not impose any specific restrictions on these materials.

[0058] In some embodiments, the cross-sectional shape of the three-core UTP cable 2 can be as follows: Figure 1 The ellipse shown can also be a circle, etc., and this application does not impose any specific restrictions on it.

[0059] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A three-core UTP cable, characterized in that, It includes differential signal line pairs, ground signal lines, filler, and an outer insulating layer, wherein the outer insulating layer encloses the differential signal line pairs, ground signal lines, and filler, and the filler is located between the differential signal line pairs, the ground signal lines, and the outer insulating layer; The differential signal line pair includes a first differential signal line and a second differential signal line, wherein the first differential signal line and the second differential signal line are twisted together using a twisted pair structure; The differential signal lines are spaced apart from the ground signal lines.

2. The three-core UTP cable according to claim 1, characterized in that, The distance between the ground signal line and the differential signal line pair is not less than the outer diameter of the differential signal line pair.

3. The three-core UTP cable according to claim 1, characterized in that, The first differential signal line includes a first differential signal core and a first differential signal core insulation layer, wherein the first differential signal core insulation layer encloses the first differential signal core; the second differential signal line includes a second differential signal core and a second differential signal core insulation layer, wherein the second differential signal core insulation layer encloses the second differential signal core; the ground signal line includes a ground signal core and a ground signal core insulation layer, wherein the ground signal core insulation layer encloses the ground signal core.

4. The three-core UTP cable according to claim 3, characterized in that, The distance between the center points of the first differential signal core and the second differential signal core is D2; The distance between the center point of the ground signal core and the center point of the first differential signal core is M1, and the distance between the center point of the ground signal core and the center point of the second differential signal core is M2. M1≥2D2, M2≥2D2.

5. The three-core UTP cable according to claim 3, characterized in that, The radius of the ground signal core is R1, the radius of the first differential signal core and the radius of the second differential signal core are both R2, and the distance between the center points of the first differential signal core and the second differential signal core is D2. When the center points of the ground signal core, the first differential signal core, and the second differential signal core are on the same straight line, the distance between the ground signal core and the nearest differential signal core is D1, where D1≥[(2×R2+D2)+R1].

6. A three-core UTP cable harness, characterized in that, include: The three-core UTP cable as described in any one of claims 1-5; The first connector has the differential signal pairs and ground signal pairs of the three-core UTP cable extending into it. The first connector includes a ground terminal and an electrical connection terminal. The ground terminal is connected to the ground signal pair, and the electrical connection terminal is used to electrically connect to an external connector to realize the transmission of differential signals and ground connection.

7. The three-core UTP harness according to claim 6, characterized in that, The grounding terminal is located on the outside of the housing of the first connector, and the grounding terminal is a conductor.

8. The three-core UTP harness according to claim 6, characterized in that, The first connector includes three pins, which are electrically connected to the first differential signal line, the second differential signal line, and the ground signal line, respectively.

9. A camera module, characterized in that, include: A circuit board, which includes a second connector; The housing contains the circuit board. In the three-core UTP harness as described in claim 6 or 7, the first connector of the three-core UTP harness is electrically connected to the second connector, and the grounding terminal is in conductive contact with the housing to achieve grounding of the housing.

10. The camera module according to claim 9, characterized in that, The first connector includes three pins, and the second connector includes three pins. The pins of the second connector and the first connector are male and female pins, respectively, so that the first connector and the second connector can be electrically connected by mating.

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