Shielded control cable

Abstract

The application relates to the technical field of cables, in particular to a shielding type control cable, which comprises an inner conductor, an inner insulation layer, a shielding layer, an outer insulation layer and an outer sheath which are sequentially arranged from inside to outside; the thickness of the shielding layer is set as an initial value of the shielding layer thickness, a theoretical value of the shielding layer thickness is obtained through a thickness analysis module, the theoretical value of the shielding layer thickness is compared with the initial value of the shielding layer thickness, and information whether the shielding layer thickness needs to be adjusted is obtained. The theoretical thickness value of the shielding layer is calculated through the thickness analysis module, the design of the shielding layer is more scientific, and the overall flexibility is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a shielded control cable. Background Art

[0002] The application document with publication number CN101882486A discloses a coaxial cable, including a center conductor, an insulator, a tape and a jacket, which defines a first edge portion and a second edge portion, each edge portion being adjacent to an inner portion, the thickness of the first edge portion being less than the thickness of the inner portion, the tape being wrapped around the insulator so that the first edge portion overlaps the second edge portion; and a jacket surrounding the tape.

[0003] In the prior art, the design of the shielding layer is based on static parameters, which makes it difficult to adjust the thickness of the shielding layer according to actual application scenarios, thereby reducing the overall dynamic adjustment capability. Summary of the Invention

[0004] The purpose of the present invention is to provide a shielded control cable to address the above-mentioned shortcomings.

[0005] The present invention adopts the following technical solutions:

[0006] A shielded control cable includes an inner conductor, an inner insulating layer, a shielding layer, an outer insulating layer, and an outer sheath, which are sequentially arranged from the inside out. The thickness of the shielding layer is set to an initial value of the shielding layer thickness. A thickness analysis module is used to analyze and obtain a theoretical value of the shielding layer thickness. The theoretical value of the shielding layer thickness is compared with the initial value of the shielding layer thickness to determine whether the shielding layer thickness needs to be adjusted.

[0007] When the initial value of the shielding layer thickness is greater than 0.5 times the theoretical value of the shielding layer thickness and less than 2 times the theoretical value of the shielding layer thickness, the shielding layer thickness does not need to be adjusted. When the initial value of the shielding layer thickness is less than or equal to 0.5 times the theoretical value of the shielding layer thickness, the shielding layer thickness needs to be thickened. When the initial value of the shielding layer thickness is greater than or equal to 2 times the theoretical value of the shielding layer thickness, the shielding layer thickness needs to be thinned.

[0008] Optionally, the thickness analysis module includes an information storage submodule, a detection submodule, a control submodule, a thickness comparison submodule and a communication module; the information storage submodule is used to store the initial value of the thickness of the shielding layer, the minimum value of the thickness of the shielding layer, the conductivity of the shielding layer material at the reference temperature, the relative dielectric constant of the shielding layer material, the reference temperature and the dielectric constant of the vacuum, and transmit them to the control submodule; the detection submodule is used to detect and derive the current ambient temperature, the frequency of the cable transmission signal, the external electromagnetic field strength, the radius of the inner conductor, the inner radius of the shielding layer and the conductivity of the shielding layer material at the current ambient temperature, and transmit them to the control submodule; the control submodule derives the dielectric constant of the shielding layer material according to the relative dielectric constant of the shielding layer material and the dielectric constant of the vacuum, derives the temperature coefficient according to the conductivity of the shielding layer material at the current ambient temperature, the conductivity of the shielding layer material at the reference temperature, the current ambient temperature and the reference temperature, and derives the temperature coefficient according to the relative dielectric constant of the shielding layer material, the radius of the inner conductor and the dielectric constant of the shielding layer The impedance of the cable transmission signal is obtained from the inner radius, and the theoretical value of the shielding layer thickness is obtained according to the minimum value of the shielding layer thickness, the impedance of the cable transmission signal, the conductivity of the shielding layer material at a reference temperature, the temperature coefficient, the current ambient temperature, the frequency of the cable transmission signal, the dielectric constant of the shielding layer material and the external electromagnetic field strength, and the theoretical value of the shielding layer thickness is transmitted to the thickness comparison submodule; the thickness comparison submodule is used to compare the initial value of the shielding layer thickness with the theoretical value of the shielding layer thickness, when the initial value of the shielding layer thickness is between 0.5 times the theoretical value of the shielding layer thickness and 2 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness does not need to be adjusted, when the initial value of the shielding layer thickness is less than or equal to 0.5 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness needs to be thickened, and when the initial value of the shielding layer thickness is greater than or equal to 2 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness needs to be thinned; the communication module transmits the information on whether the shielding layer thickness needs to be adjusted to the user end.

[0009] Optionally, the detection submodule includes a temperature detection unit, a frequency detection unit, a magnetic field strength detection unit, a visual detection unit and a conductivity detection unit; the temperature detection unit is used to detect and derive the current ambient temperature, and transmit it to the control submodule; the frequency detection unit is used to detect and derive the frequency of the cable transmission signal, and transmit it to the control submodule; the magnetic field strength detection unit is used to detect and derive the external electromagnetic field strength, and transmit it to the control submodule; the visual detection unit is used to detect and derive the radius of the inner conductor and the inner radius of the shielding layer, and transmit them to the control submodule; the conductivity detection unit is used to detect and derive the conductivity of the material of the shielding layer at the current ambient temperature, and transmit it to the control submodule.

[0010] Optionally, the visual detection unit comprises a camera, a preprocessor, an edge detector and a data processor; the camera is used for shooting and obtaining an initial image; the preprocessor converts the initial image into a gray image; the edge detector extracts the boundaries of the inner conductor and the shielding layer in the gray image using an edge detection algorithm; and the data processor obtains the radius of the inner conductor and the inner radius of the shielding layer according to the boundaries of the inner conductor and the shielding layer and transmits them to the control submodule.

[0011] Optionally, when the control submodule calculates the theoretical value of the shielding layer thickness, the following formula is satisfied: Wherein, ST is the theoretical value of the shielding layer thickness, hd min is the minimum value of the shielding layer thickness, zk is the impedance of the cable transmission signal, dd(t ck ) is the conductivity of the shielding layer material at the reference temperature, a is the temperature coefficient, t e is the current environmental temperature, pl is the frequency of the cable transmission signal, jd is the dielectric constant of the shielding layer material, and b is the external electromagnetic field strength.

[0012] The beneficial effects obtained by the present application are as follows:

[0013] 1. The theoretical thickness value of the shielding layer is calculated by the thickness analysis module, so that the design of the shielding layer is more scientific and can meet the target shielding effectiveness.

[0014] 2. The thickness of the shielding layer is optimized according to the theoretical calculation result, so as to avoid waste of materials.

[0015] 3. The method can flexibly adjust the thickness of the shielding layer according to different application scenarios (such as high-frequency transmission, complex electromagnetic environment, etc.), so as to improve the applicability of the cable in various scenarios.

[0016] 4. The thickness analysis module is used to make the design and production process of the shielding layer more intelligent, so as to reduce manual intervention and design errors.

[0017] In order to further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the provided drawings are only used for reference and illustration, and are not used to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0019] Figure 2 It is a schematic diagram of part of the structure of the present application;

[0020] Figure 3 It is a schematic diagram of the structure of the detection submodule in the present application;

[0021] Figure 4 Schematic diagram of the structure of the visual detection unit in the present invention;

[0022] Figure 5 It is the effect diagram of the present invention;

[0023] Figure 6 This is a partial structural diagram of the second embodiment of the present invention;

[0024] Figure 7 This is a rendering of the second embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present invention. In addition, the drawings of the present invention are only for simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0026] Example 1: This embodiment provides a shielded control cable, combined with Figures 1 to 5 shown.

[0027] A shielded control cable includes an inner conductor, an inner insulating layer, a shielding layer, an outer insulating layer, and an outer sheath, which are sequentially arranged from the inside out. The thickness of the shielding layer is set to an initial value of the shielding layer thickness. A thickness analysis module is used to analyze and obtain a theoretical value of the shielding layer thickness. The theoretical value of the shielding layer thickness is compared with the initial value of the shielding layer thickness to determine whether the shielding layer thickness needs to be adjusted.

[0028] When the initial value of the shielding layer thickness is greater than 0.5 times the theoretical value of the shielding layer thickness and less than 2 times the theoretical value of the shielding layer thickness, the shielding layer thickness does not need to be adjusted. When the initial value of the shielding layer thickness is less than or equal to 0.5 times the theoretical value of the shielding layer thickness, the shielding layer thickness needs to be thickened. When the initial value of the shielding layer thickness is greater than or equal to 2 times the theoretical value of the shielding layer thickness, the shielding layer thickness needs to be thinned.

[0029] Optionally, the thickness analysis module includes an information storage submodule, a detection submodule, a control submodule, a thickness comparison submodule and a communication module; the information storage submodule is used to store the initial value of the thickness of the shielding layer, the minimum value of the thickness of the shielding layer, the conductivity of the shielding layer material at the reference temperature, the relative dielectric constant of the shielding layer material, the reference temperature and the dielectric constant of the vacuum, and transmit them to the control submodule; the detection submodule is used to detect and derive the current ambient temperature, the frequency of the cable transmission signal, the external electromagnetic field strength, the radius of the inner conductor, the inner radius of the shielding layer and the conductivity of the shielding layer material at the current ambient temperature, and transmit them to the control submodule; the control submodule derives the dielectric constant of the shielding layer material according to the relative dielectric constant of the shielding layer material and the dielectric constant of the vacuum, derives the temperature coefficient according to the conductivity of the shielding layer material at the current ambient temperature, the conductivity of the shielding layer material at the reference temperature, the current ambient temperature and the reference temperature, and derives the temperature coefficient according to the relative dielectric constant of the shielding layer material, the radius of the inner conductor and the dielectric constant of the shielding layer The impedance of the cable transmission signal is obtained from the inner radius, and the theoretical value of the shielding layer thickness is obtained according to the minimum value of the shielding layer thickness, the impedance of the cable transmission signal, the conductivity of the shielding layer material at a reference temperature, the temperature coefficient, the current ambient temperature, the frequency of the cable transmission signal, the dielectric constant of the shielding layer material and the external electromagnetic field strength, and the theoretical value of the shielding layer thickness is transmitted to the thickness comparison submodule; the thickness comparison submodule is used to compare the initial value of the shielding layer thickness with the theoretical value of the shielding layer thickness, when the initial value of the shielding layer thickness is between 0.5 times the theoretical value of the shielding layer thickness and 2 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness does not need to be adjusted, when the initial value of the shielding layer thickness is less than or equal to 0.5 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness needs to be thickened, and when the initial value of the shielding layer thickness is greater than or equal to 2 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness needs to be thinned; the communication module transmits the information on whether the shielding layer thickness needs to be adjusted to the user end.

[0030] Optionally, the detection submodule includes a temperature detection unit, a frequency detection unit, a magnetic field strength detection unit, a visual detection unit and a conductivity detection unit; the temperature detection unit is used to detect and derive the current ambient temperature, and transmit it to the control submodule; the frequency detection unit is used to detect and derive the frequency of the cable transmission signal, and transmit it to the control submodule; the magnetic field strength detection unit is used to detect and derive the external electromagnetic field strength, and transmit it to the control submodule; the visual detection unit is used to detect and derive the radius of the inner conductor and the inner radius of the shielding layer, and transmit them to the control submodule; the conductivity detection unit is used to detect and derive the conductivity of the material of the shielding layer at the current ambient temperature, and transmit it to the control submodule.

[0031] Optionally, the visual detection unit includes a camera, a preprocessor, an edge detector and a data processor; the camera is used to capture and obtain an initial image; the preprocessor converts the initial image into a grayscale image; the edge detector uses an edge detection algorithm to extract the boundary of the inner conductor and the shielding layer in the grayscale image; the data processor obtains the radius of the inner conductor and the inner radius of the shielding layer based on the boundary of the inner conductor and the shielding layer, and transmits them to the control submodule.

[0032] Optionally, when the control submodule calculates the theoretical value of the shielding layer thickness, the following formula is satisfied: Among them, ST is the theoretical value of the shielding layer thickness, hd min is the minimum thickness of the shielding layer, zk is the impedance of the cable transmitting the signal, dd(t ck ) is the conductivity of the shielding material at the reference temperature, α is the temperature coefficient, t e is the current ambient temperature, pl is the frequency of the cable transmission signal, jd is the dielectric constant of the shielding material, and b is the external electromagnetic field strength.

[0033] Optionally, the following formula is satisfied during the calculation of the control submodule:

[0034]

[0035] Among them, e r is the relative dielectric constant of the shielding material, nb is the radius of the inner conductor, and wb is the inner radius of the shielding layer;

[0036] dd(te) is the conductivity of the shielding material at the current ambient temperature, t ck is the reference temperature;

[0037] e z is the dielectric constant of vacuum.

[0038] When the control submodule calculates the theoretical value of the shielding layer thickness, refer to the following program code:

[0039] import math

[0040] def calculate theoretical thickness of shielding layer (hd_min,nb,wb,pl,b,dd_tck,dd_te,te,tck,er,e0):

[0041] """

[0042] Calculate the theoretical thickness of the shielding layer (ST)

[0043] parameter:

[0044] -hd_min: minimum thickness of the shield -nb: radius of the inner conductor

[0045] -wb: the radius of the inner surface of the shielding layer -pl: the frequency of the signal transmitted by the cable -b: the strength of the external electromagnetic field

[0046] -dd_tck: conductivity of the shield material at the reference temperature -dd_te: conductivity of the shield material at the current ambient temperature -te: current ambient temperature

[0047] -tck: reference temperature

[0048] -er: relative dielectric constant of the shielding material -e0: dielectric constant of vacuum

[0049] Return value:

[0050] -ST: Theoretical thickness of the shielding layer

[0051]

[0052] #Example input parameters (hypothetical values, can be replaced according to actual conditions)

[0053] hd_min=0.1#Minimum thickness of shielding layer, in meters

[0054] nb = radius of 5.0# inner conductor, in meters

[0055] wb=10.0#Radius of the inner surface of the shielding layer, in meters

[0056] pl=1e9#The frequency of the cable transmission signal, in Hertz

[0057] b=1e-3#External electromagnetic field strength, unit is Tesla

[0058] dd_tck=5.8e7# Conductivity of the shielding material at the reference temperature, in Siemens per meter

[0059] dd_te=5.7e7# Conductivity of the shielding material at the current ambient temperature, in Siemens per meter

[0060] te=50#Current ambient temperature, in degrees Celsius

[0061] tck=20# reference temperature, in degrees Celsius

[0062] er=2.2# relative dielectric constant of shielding material

[0063] e0=8.854e-12#The dielectric constant of vacuum, in farads per meter

[0064] #Calculate ST

[0065] ST = calculate the theoretical thickness of the shielding layer (hd_min, nb, wb, pl, b, dd_tck, dd_te, te, tck, er, e0)

[0066] print(f"The theoretical thickness of the shielding layer (ST) is: {ST:.6f} meters")

[0067] Specifically, the unit of the theoretical value of the shielding layer thickness is millimeters.

[0068] The minimum value of the shielding layer thickness is in millimeters, which is set by a person skilled in the art according to the characteristics of the cable, and the minimum value of the shielding layer thickness is set to meet the minimum shielding requirement, and the minimum value of the shielding layer thickness is in the range of 0.05 millimeters to 10 millimeters.

[0069] The impedance of the cable transmission signal is in ohms, considering that the impedance of the cable transmission signal can reflect the interaction between the shielding layer and the electromagnetic wave, the impedance of the cable transmission signal can affect the reflection and transmission characteristics of the electromagnetic wave on the shielding layer, and then affect the shielding effect. Generally, the larger the value of the impedance of the cable transmission signal, the larger the value of the theoretical value of the shielding layer thickness should be, because the larger impedance of the cable transmission signal can enhance the reflection effect of the shielding layer on the electromagnetic wave, and then the thickness of the shielding layer needs to be increased to ensure good impedance matching and enhance the shielding effect.

[0070] The conductivity of the shielding layer material at the reference temperature is in Siemens per millimeter, and the conductivity of the shielding layer material at the reference temperature is obtained by a person skilled in the art.

[0071] The unit of the current environmental temperature is Celsius.

[0072] The frequency of the cable transmission signal is in radians per second.

[0073] The unit of the external electromagnetic field strength is Tesla.

[0074] The relative dielectric constant of the shielding layer material is obtained by a person skilled in the art.

[0075] The radius of the inner conductor and the inner radius of the shielding layer are both in millimeters.

[0076] The conductivity of the shielding layer material at the current environmental temperature is in Siemens per millimeter.

[0077] The reference temperature is in Celsius, and the reference temperature is generally set to 20 degrees Celsius or 25 degrees Celsius, and the specific value is set by a person skilled in the art according to the actual situation.

[0078] The dielectric constant of vacuum is 8.854×10-12 F / m.

[0079] The above units are only examples, and those skilled in the art can set different units according to actual needs when implementing the present solution.

[0080] The embodiment solves the problem of poor dynamic adjustment capability of the conventional control cable, and calculates the theoretical thickness value of the shielding layer through the thickness analysis module, so that the design of the shielding layer is more scientific and can meet the target shielding effectiveness.

[0081] Embodiment two: This embodiment includes all the contents of embodiment one, and provides a shielding type control cable, which is combined with Figure 6 and Figure 7 as shown.

[0082] The information storage submodule is further used to store the maximum value of the mechanical pressure of the shielding layer and transmit it to the control submodule.

[0083] The detection submodule is used to detect and derive the shielding effectiveness of the shielding layer, the magnetic permeability of the material of the shielding layer at the current environmental temperature, and the measured value of the mechanical pressure of the shielding layer, and transmit them to the control submodule.

[0084] The control submodule derives the external pressure influence factor according to the measured value of the mechanical pressure of the shielding layer and the maximum value of the mechanical pressure of the shielding layer, derives the minimum value of the thickness of the shielding layer according to the external pressure influence factor, the shielding effectiveness of the shielding layer, the frequency of the cable transmission signal, the magnetic permeability of the material of the shielding layer at the current environmental temperature, and the electrical conductivity of the material of the shielding layer at the current environmental temperature, and transmits the minimum value of the thickness of the shielding layer to the information storage submodule.

[0085] Optionally, when the control submodule calculates the minimum value of the thickness of the shielding layer, the following formula is satisfied:

[0086]

[0087] Wherein, P is the external pressure influence factor, se is the shielding effectiveness of the shielding layer, cdl(t e ) is the magnetic permeability of the material of the shielding layer at the current environmental temperature;

[0088] p sc is the measured value of the mechanical pressure of the shielding layer, and p re f is the maximum value of the mechanical pressure of the shielding layer.

[0089] When the control submodule calculates the minimum value of the thickness of the shielding layer, the following program code is referred to:

[0090]

[0091] cdl_te=4*math.pi*1e-7#Magnetic permeability of the shielding layer material at the current ambient temperature, in H / m

[0092] dd_te=5.8e7# Conductivity of the shielding material at the current ambient temperature, in S / m

[0093] pl=1e9#The frequency of the cable transmission signal, in Hz

[0094] p_se=120#The measured value of the shielding layer's external mechanical pressure, in Pa

[0095] p_ref=100#The maximum value of the external mechanical pressure that the shielding layer can withstand, in Pa

[0096] #Calculate the minimum thickness of the shielding layer

[0097] hd_min=Calculate minimum shield thickness (se,cdl_te,dd_te,pl,p_se,p_ref)

[0098] print(f"The minimum thickness of the shielding layer (hd_min) is: {hd_min: .6f} meters")

[0099] Specifically, when the cable is buried underground, those skilled in the art need to calculate the minimum thickness of the corresponding shielding layer through a formula to improve overall accuracy.

[0100] The unit of shielding effectiveness of the shielding layer is decibel. The shielding effectiveness can be tested by the opening method. For example, the shielding layer is exposed to an environment with a known electromagnetic field strength and the electric field strength inside and outside the shielding layer is measured. The measurement formula is as follows

[0101] The magnetic permeability of the shield material at the current ambient temperature is expressed in Henrys per millimeter.

[0102] The units of the measured value of the external mechanical pressure that the shielding layer can withstand and the maximum value of the external mechanical pressure that the shielding layer can withstand are both Pascals. The maximum value of the external mechanical pressure that the shielding layer can withstand is set by those skilled in the art.

[0103] The above units are only examples, and those skilled in the art may set different units according to actual needs when implementing this solution.

[0104] This embodiment solves the problem of poor flexibility of traditional control cables and achieves precise shielding design through comprehensive analysis of multiple parameters (shielding effectiveness, mechanical pressure, temperature, etc.).

[0105] The contents disclosed above are only preferred feasible embodiments of the present invention and do not limit the scope of protection of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the scope of protection of the present invention. In addition, the elements therein can be updated as technology develops.

Claims

1. A shielded control cable, characterized in that: The cable comprises an inner conductor, an inner insulation layer, a shielding layer, an outer insulation layer and an outer sheath which are sequentially arranged from the inside to the outside; The thickness of the shielding layer is set as an initial value of the shielding layer thickness, a theoretical value of the shielding layer thickness is obtained by analyzing the thickness analysis module, the theoretical value of the shielding layer thickness is compared with the initial value of the shielding layer thickness, and information on whether the shielding layer thickness needs to be adjusted is obtained; When the initial value of the shielding layer thickness is greater than 0.5 times the theoretical value of the shielding layer thickness and less than 2 times the theoretical value of the shielding layer thickness, the shielding layer thickness does not need to be adjusted; when the initial value of the shielding layer thickness is less than or equal to 0.5 times the theoretical value of the shielding layer thickness, the shielding layer thickness needs to be thickened; when the initial value of the shielding layer thickness is greater than or equal to 2 times the theoretical value of the shielding layer thickness, the shielding layer thickness needs to be thinned; The thickness analysis module includes an information storage submodule, a detection submodule, a control submodule, a thickness comparison submodule and a communication module; The information storage submodule is used to store the initial value of the shielding layer thickness, the minimum value of the shielding layer thickness, the conductivity of the shielding layer material at the reference temperature, the relative dielectric constant of the shielding layer material, the reference temperature and the dielectric constant of the vacuum, and transmit the information to the control submodule; The detection submodule is used to detect and obtain the current ambient temperature, the frequency of the cable transmission signal, the external electromagnetic field strength, the radius of the inner conductor, the inner radius of the shielding layer and the conductivity of the material of the shielding layer at the current ambient temperature, and transmit the results to the control submodule; The control submodule obtains the dielectric constant of the shielding layer material according to the relative dielectric constant of the shielding layer material and the dielectric constant of vacuum, obtains the temperature coefficient according to the conductivity of the shielding layer material at the current ambient temperature, the conductivity of the shielding layer material at the reference temperature, the current ambient temperature and the reference temperature, obtains the impedance of the cable transmission signal according to the relative dielectric constant of the shielding layer material, the radius of the inner conductor and the inner radius of the shielding layer, obtains the theoretical value of the shielding layer thickness according to the minimum thickness of the shielding layer, the impedance of the cable transmission signal, the conductivity of the shielding layer material at the reference temperature, the temperature coefficient, the current ambient temperature, the frequency of the cable transmission signal, the dielectric constant of the shielding layer material and the external electromagnetic field strength, and transmits the theoretical value of the shielding layer thickness to the thickness comparison submodule; The thickness comparison submodule is used to compare the initial value of the shielding layer thickness with the theoretical value of the shielding layer thickness, and when the initial value of the shielding layer thickness is between 0.5 times the theoretical value of the shielding layer thickness and 2 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness does not need to be adjusted; when the initial value of the shielding layer thickness is less than or equal to 0.5 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness needs to be thickened; when the initial value of the shielding layer thickness is greater than or equal to 2 times the theoretical value of the shielding layer thickness, it sends information that the shielding layer thickness needs to be thinned; The communication module transmits information on whether the thickness of the shielding layer needs to be adjusted to the user end; When the control submodule calculates the theoretical value of the shielding layer thickness, the following formula is satisfied: ； in, is the theoretical value of the shielding layer thickness, is the minimum thickness of the shielding layer, is the impedance of the cable transmitting the signal, is the conductivity of the shielding material at the reference temperature, is the temperature coefficient, is the current ambient temperature, is the frequency of the signal transmitted by the cable, is the dielectric constant of the shielding material, is the external electromagnetic field strength.

2. A shielded control cable according to claim 1, characterized in that: The detection submodule includes a temperature detection unit, a frequency detection unit, a magnetic field strength detection unit, a visual detection unit and a conductivity detection unit; The temperature detection unit is used to detect and obtain the current ambient temperature and transmit it to the control submodule; The frequency detection unit is used to detect and obtain the frequency of the cable transmission signal and transmit it to the control submodule; The magnetic field strength detection unit is used to detect and obtain the external electromagnetic field strength and transmit it to the control submodule; The visual detection unit is used to detect and obtain the radius of the inner conductor and the inner radius of the shielding layer, and transmit the obtained information to the control submodule; The conductivity detection unit is used to detect and obtain the conductivity of the material of the shielding layer at the current ambient temperature, and transmit the result to the control submodule.

3. A shielded control cable according to claim 2, characterized in that: The visual detection unit includes a camera, a preprocessor, an edge detector and a data processor; The camera is used to capture and obtain an initial image; The preprocessor converts the initial image into a grayscale image; The edge detector uses an edge detection algorithm to extract the boundary between the inner conductor and the shielding layer in the grayscale image; The data processor obtains the radius of the inner conductor and the inner radius of the shielding layer according to the boundaries of the inner conductor and the shielding layer, and transmits the obtained values ​​to the control submodule.

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