Medical endoscope cable stability auxiliary analysis method and device and cable

Abstract

The invention discloses a medical endoscope cable stability auxiliary analysis method and device and a cable, and relates to the technical field of medical instruments.The medical endoscope cable stability auxiliary analysis method comprises the steps that whether the impedance of the connecting parts of a medical endoscope cable, an endoscope camera host and a displayer is matched or not is checked through an impedance testing instrument; testing the insulation resistance of the medical endoscope cable through a high-voltage insulation resistance tester by using an unbalanced bridge method; at least one auxiliary punctuation point is uniformly arranged in the medical endoscope cable; evaluating the image signal attenuation condition of the medical endoscope cable at the auxiliary punctuation point under the conditions of different lengths and bending; testing the stability of the medical endoscope cable under the interference of an external electromagnetic field; and modeling and analyzing the medical endoscope cable by using simulation software. The electrical performance analysis module, the physical performance analysis module, the electromagnetic compatibility analysis module and the environmental adaptability analysis module are arranged to comprehensively evaluate the performance of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stability auxiliary analysis method, device and cable for a medical endoscope cable. Background Art

[0002] Medical endoscopes have promoted the continuous development of medicine in different periods. With the continuous progress of electronic technology and other scientific and technological advances in the future, I believe that its technology will have a wider and deeper development. Not only can it complete any task completed today, it will also use a special spectrum CCD to provide new diagnostic image information, and can also use image processing technology to obtain special images of diseased tissues, and can use image analysis technology to achieve quantitative analysis and quantitative diagnosis of lesions, and can also conduct remote consultations through telecommunications. Multifunctional electronic endoscopes have been introduced, which can not only obtain diagnostic information on the morphology of tissues and organs, but also measure various physiological functions of tissues and organs.

[0003] Medical endoscope cables need to withstand frequent bending, twisting and stretching during use, which places high demands on their durability. However, some cables are prone to breakage, wear or poor signal transmission due to problems with materials or manufacturing processes, resulting in the endoscope not being able to work properly or image quality being degraded. In modern medical environments, the use of various electronic devices is becoming increasingly common. These devices may generate electromagnetic interference, affecting the signal transmission of medical endoscope cables. Electromagnetic interference may cause image distortion, signal loss or transmission delay, thus affecting doctors' diagnosis and treatment decisions. Summary of the invention

[0004] In order to solve the above technical problems, a stability auxiliary analysis method, device and cable of a medical endoscope cable are provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A stability auxiliary analysis method for a medical endoscope cable, comprising:

[0007] Use an impedance tester to check whether the impedance of the connection between the medical endoscope cable and the endoscope camera host and display matches;

[0008] The insulation impedance of medical endoscope cables is tested using a high voltage insulation resistance tester using the unbalanced bridge method;

[0009] Evenly set at least one auxiliary mark point inside the medical endoscope cable, and record the image signal intensity at the auxiliary mark point;

[0010] By setting up at least one simulation experiment, the image signal attenuation at the auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions is evaluated;

[0011] By applying electromagnetic fields of different frequencies and intensities, the stability of the medical endoscope cable under external electromagnetic field interference is tested, and the changes in the image signal intensity at each auxiliary punctuation point are observed;

[0012] Wrap a metal shielding layer around the medical endoscope cable and test its stability again under external electromagnetic field interference of different frequencies and intensities;

[0013] The medical endoscope cable is modeled and analyzed using simulation software. The material and structure of the medical endoscope cable are input, and the transmission performance of the medical endoscope cable under different temperatures, humidity, and pH values ​​is analyzed.

[0014] Preferably, the step of checking whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display matches by using an impedance testing instrument specifically includes:

[0015] Connect the output end of the impedance tester to the end of the medical endoscope cable connected to the endoscope camera host;

[0016] Connect the input end of the impedance tester to the end of the medical endoscope cable connected to the monitor;

[0017] Set the test frequency and impedance range parameters on the impedance tester, start the impedance tester, and start measuring;

[0018] Draw a resistance-impedance diagram from the measurement results and calculate the phase angle in the image;

[0019] The impedance formula is used to calculate the impedance of the connection between the medical endoscope cable and the endoscope camera host and display;

[0020] Determine whether the impedance exceeds the preset impedance range. If so, the output impedance is not matched, the signal is reflected and attenuated, the image quality is affected, and the cable needs to be reconnected to the endoscope camera host and the display. If not, the output impedance is matched;

[0021] The impedance formula is:

[0022]

[0023] Where X is the impedance of the connection between the medical endoscope cable and the endoscope camera host and display, R is the resistance value of the connection part, and θ is the phase angle in the resistance-impedance diagram.

[0024] Preferably, the method of testing the insulation impedance of the medical endoscope cable by using a high voltage insulation resistance tester using an unbalanced bridge method specifically includes:

[0025] Connect the positive terminal of the high voltage insulation resistance tester to the conductor portion of the medical endoscope cable;

[0026] Connect the negative terminal of the high voltage insulation resistance tester to the insulation layer or grounding part of the medical endoscope cable;

[0027] Add a switch and a resistor on each side, and change the equivalent resistance of the two poles to the ground by switching the switches on both sides alternately, so as to obtain the unbalanced detection voltage on the positive and negative detection resistors;

[0028] The voltage on the positive and negative detection resistors changes with the switching cycle. When the insulation resistance of one pole becomes lower, the voltage on the detection resistor on that side becomes smaller, and the voltage on the corresponding detection resistor on the other side becomes larger.

[0029] Based on the relationship between voltage and resistance in the circuit, calculate the insulation resistance of the positive and negative electrodes;

[0030] Determine whether the insulation impedance of the positive and negative poles is less than the preset threshold. If so, the insulation of the output medical endoscope cable is unqualified and an insulating protective layer needs to be wrapped on the outermost layer of the cable. If not, the insulation of the output medical endoscope cable is qualified.

[0031] Preferably, the step of setting up at least one simulation experiment to evaluate the attenuation of image signals at auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions specifically includes:

[0032] Setting up a first simulation experiment to test the image signal strength at each auxiliary punctuation point of the medical endoscope cable without being bent;

[0033] A second simulation experiment is set up to test the change in the image signal intensity at the auxiliary mark point when the medical endoscope cable is bent at different angles before the auxiliary mark point;

[0034] A third simulation experiment is set up to test the change in the image signal intensity at the auxiliary mark point when the medical endoscope cable is bent at different radii before the auxiliary mark point;

[0035] By observing and recording the image quality on the image signal receiver, the image signal strength at each auxiliary punctuation point is indicated, and the image quality includes brightness, contrast and clarity;

[0036] Based on the recorded data, plot the relationship between image signal attenuation and cable length, bend angle, and bend radius.

[0037] Preferably, the step of applying electromagnetic fields of different frequencies and intensities to test the stability of the medical endoscope cable under external electromagnetic field interference and observing changes in the image signal intensity at each auxiliary punctuation point specifically includes:

[0038] In the absence of electromagnetic interference, the image signal intensity at each auxiliary punctuation point was recorded as the control group data;

[0039] Using an electromagnetic field generator, gradually applying an electromagnetic field to the outside of the medical endoscope cable according to a preset frequency and intensity range;

[0040] During the application of the electromagnetic field, the changes in the image signal intensity at each auxiliary punctuation point were observed and recorded as experimental group data;

[0041] Using the stability formula, calculate the stability of medical endoscope cables under external electromagnetic field interference of different frequencies and intensities;

[0042] The stability formula is:

[0043]

[0044] Where μ is the stability of the medical endoscope cable, α i is the image signal intensity at the i-th auxiliary mark in the control group, α i ' is the image signal intensity at the ith auxiliary mark of the experimental group, and n is the total number of auxiliary marks.

[0045] Preferably, the use of simulation software to model and analyze the medical endoscope cable, inputting the material and structure of the medical endoscope cable, and analyzing the transmission performance of the medical endoscope cable under different temperatures, humidity and pH specifically includes:

[0046] Comsol Multiphysics software was selected as the simulation software to model and analyze medical endoscope cables;

[0047] Input insulation protection layer materials, optical fiber materials and metal shielding layer materials as well as the structure between the materials;

[0048] According to the material information of the medical endoscope cable, the material properties of each part are set in the simulation software, wherein the material properties include electrical conductivity, dielectric constant and thermal conductivity;

[0049] By setting the environmental parameters of temperature, humidity and pH of the medical endoscope cable, the signal transmission of the cable in different environments is simulated;

[0050] Based on the analysis results, improve material selection and optimize structural design.

[0051] Furthermore, a stability auxiliary analysis device for a medical endoscope cable is proposed, which is used to implement the stability auxiliary analysis method for a medical endoscope cable as described above, comprising:

[0052] An electrical performance analysis module, which is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched through an impedance testing instrument, and to test the insulation impedance of the medical endoscope cable through a high voltage insulation resistance tester using an unbalanced bridge method;

[0053] A physical performance analysis module, the physical performance analysis module is used to evenly set at least one auxiliary punctuation point inside the medical endoscope cable, record the image signal strength at the auxiliary punctuation point, and evaluate the image signal attenuation at the auxiliary punctuation point of the medical endoscope cable under different lengths and bending conditions by setting at least one simulation experiment;

[0054] An electromagnetic compatibility analysis module, which is used to test the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities, and observe the changes in the image signal intensity at each auxiliary punctuation point, wrap a metal shielding layer on the outside of the medical endoscope cable, and test its stability again under external electromagnetic field interference of different frequencies and intensities;

[0055] An environmental adaptability analysis module is used to model and analyze the medical endoscope cable using simulation software, input the material and structure of the medical endoscope cable, and analyze the transmission performance of the medical endoscope cable under different temperatures, humidity and pH.

[0056] Optionally, the electrical performance analysis module specifically includes:

[0057] An impedance matching judgment unit, which is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched through an impedance testing instrument;

[0058] An insulation impedance testing unit, which is used to test the insulation impedance of a medical endoscope cable using an unbalanced bridge method through a high voltage insulation resistance tester;

[0059] The physical performance analysis module specifically includes:

[0060] An auxiliary punctuation point setting unit, the auxiliary punctuation point setting unit is used to evenly set at least one auxiliary punctuation point inside the medical endoscope cable and record the image signal strength at the auxiliary punctuation point;

[0061] A physical performance testing unit, the physical performance testing unit is used to evaluate the attenuation of image signals at auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions by setting at least one simulation experiment;

[0062] The electromagnetic compatibility analysis module specifically includes:

[0063] A first electromagnetic immunity test unit, which is used to test the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities, and observe changes in image signal intensity at each auxiliary punctuation point;

[0064] The second electromagnetic immunity test unit is used to wrap a metal shielding layer on the outside of the medical endoscope cable and test its stability again under external electromagnetic field interference of different frequencies and intensities.

[0065] Furthermore, a cable is proposed for implementing the stability auxiliary analysis method of the medical endoscope cable as described above, comprising:

[0066] An insulating protective layer, which is located at the outermost layer of the cable and is used to prevent leakage current from occurring during the use of the medical endoscope cable and affecting the safety of patients or medical staff;

[0067] A metal shielding layer, which is located inside the insulating protective layer and is used to improve the stability of the medical endoscope cable under external electromagnetic field interference;

[0068] An optical fiber, which is located inside the metal shielding layer and is used to transmit image signals;

[0069] Auxiliary punctuation points, which are located in the inner layer of the optical fiber, are used to record the image signal strength at the auxiliary punctuation points so as to test the transmission performance of the medical endoscope cable under different conditions.

[0070] Compared with the prior art, the present invention has the following beneficial effects:

[0071] By setting up electrical performance analysis module, physical performance analysis module, electromagnetic compatibility analysis module and environmental adaptability analysis module, the transmission performance of medical endoscope cables under different conditions is simulated and potential problem points are found, thereby ensuring the stability and safety of the medical endoscope system, thereby improving the quality of medical diagnosis and treatment, and providing strong support for the quality control and safety assessment of medical endoscopes. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 A flow chart of the stability auxiliary analysis method of the medical endoscope cable of the present invention;

[0073] Figure 2 A flow chart of a method for checking whether the impedance of a connection portion between a medical endoscope cable and an endoscope camera host and a display is matched according to the present invention;

[0074] Figure 3 This is a flow chart of a method for testing the insulation impedance of a medical endoscope cable according to the present invention;

[0075] Figure 4 A flow chart of a method for evaluating the attenuation of image signals at auxiliary punctuation points of a medical endoscope cable under different lengths and bending conditions according to the present invention;

[0076] Figure 5 A flow chart of a method for testing the stability of a medical endoscope cable under external electromagnetic field interference according to the present invention;

[0077] Figure 6 The present invention is a flow chart of the method for modeling and analyzing medical endoscope cables using simulation software. DETAILED DESCRIPTION

[0078] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0079] Reference Figure 1 As shown, a stability auxiliary analysis method for a medical endoscope cable comprises:

[0080] Use an impedance tester to check whether the impedance of the connection between the medical endoscope cable and the endoscope camera host and display matches;

[0081] The insulation impedance of medical endoscope cables is tested using a high voltage insulation resistance tester using the unbalanced bridge method;

[0082] Evenly set at least one auxiliary mark point inside the medical endoscope cable, and record the image signal intensity at the auxiliary mark point;

[0083] By setting up at least one simulation experiment, the image signal attenuation at the auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions is evaluated;

[0084] By applying electromagnetic fields of different frequencies and intensities, the stability of the medical endoscope cable under external electromagnetic field interference is tested, and the changes in the image signal intensity at each auxiliary punctuation point are observed;

[0085] Wrap a metal shielding layer around the medical endoscope cable and test its stability again under external electromagnetic field interference of different frequencies and intensities;

[0086] The medical endoscope cable is modeled and analyzed using simulation software. The material and structure of the medical endoscope cable are input, and the transmission performance of the medical endoscope cable under different temperatures, humidity, and pH values ​​is analyzed.

[0087] Reference Figure 2 As shown, the impedance tester is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display matches, specifically including:

[0088] Connect the output end of the impedance tester to the end of the medical endoscope cable connected to the endoscope camera host;

[0089] Connect the input end of the impedance tester to the end of the medical endoscope cable connected to the monitor;

[0090] Set the test frequency and impedance range parameters on the impedance tester, start the impedance tester, and start measuring;

[0091] Draw a resistance-impedance diagram from the measurement results and calculate the phase angle in the image;

[0092] The impedance formula is used to calculate the impedance of the connection between the medical endoscope cable and the endoscope camera host and display;

[0093] Determine whether the impedance exceeds the preset impedance range. If so, the output impedance is not matched, the signal is reflected and attenuated, the image quality is affected, and the cable needs to be reconnected to the endoscope camera host and the display. If not, the output impedance is matched;

[0094] The impedance formula is:

[0095]

[0096] Where X is the impedance of the connection between the medical endoscope cable and the endoscope camera host and display, R is the resistance value of the connection part, and θ is the phase angle in the resistance-impedance diagram.

[0097] Impedance is one of the parameters that characterize the characteristics of electronic devices. Impedance is defined as the resistance of the device to alternating current at a given frequency. Impedance is usually expressed in the form of a complex quantity and can be plotted on polar coordinates. The first and second quadrants of the coordinates correspond to positive inductance and positive capacitance, respectively; the third and fourth quadrants represent negative resistance values.

[0098] Reference Figure 3 As shown in the figure, the insulation impedance of the medical endoscope cable is tested by a high voltage insulation resistance tester using an unbalanced bridge method, including:

[0099] Connect the positive terminal of the high voltage insulation resistance tester to the conductor portion of the medical endoscope cable;

[0100] Connect the negative terminal of the high voltage insulation resistance tester to the insulation layer or grounding part of the medical endoscope cable;

[0101] Add a switch and a resistor on each side, and change the equivalent resistance of the two poles to the ground by switching the switches on both sides alternately, so as to obtain the unbalanced detection voltage on the positive and negative detection resistors;

[0102] The voltage on the positive and negative detection resistors changes with the switching cycle. When the insulation resistance of one pole becomes lower, the voltage on the detection resistor on that side becomes smaller, and the voltage on the corresponding detection resistor on the other side becomes larger.

[0103] Based on the relationship between voltage and resistance in the circuit, calculate the insulation resistance of the positive and negative electrodes;

[0104] Determine whether the insulation impedance of the positive and negative poles is less than the preset threshold. If so, the insulation of the output medical endoscope cable is unqualified and an insulating protective layer needs to be wrapped on the outermost layer of the cable. If not, the insulation of the output medical endoscope cable is qualified.

[0105] The advantage of the unbalanced bridge method is that it can accurately detect the insulation resistance of the positive and negative electrodes. The disadvantage is that the circuit needs to wait for a period of time to reach a steady state after switching the switch, so the detection time is relatively long.

[0106] Reference Figure 4 As shown, by setting up at least one simulation experiment, the image signal attenuation at the auxiliary punctuation point of the medical endoscope cable under different lengths and bending conditions is evaluated, specifically including:

[0107] Setting up a first simulation experiment to test the image signal strength at each auxiliary punctuation point of the medical endoscope cable without being bent;

[0108] A second simulation experiment is set up to test the change in the image signal intensity at the auxiliary mark point when the medical endoscope cable is bent at different angles before the auxiliary mark point;

[0109] A third simulation experiment is set up to test the change in the image signal intensity at the auxiliary mark point when the medical endoscope cable is bent at different radii before the auxiliary mark point;

[0110] By observing and recording the image quality on the image signal receiver, the image signal strength at each auxiliary punctuation point is indicated, and the image quality includes brightness, contrast and clarity;

[0111] Based on the recorded data, plot the relationship between image signal attenuation and cable length, bend angle, and bend radius.

[0112] The experiment should be carried out in a dry, windless environment with constant room temperature to avoid the influence of environmental factors on the experimental results, ensure the accuracy and precision of the measuring tools, and avoid the influence of errors on the experimental results.

[0113] Reference Figure 5 As shown in the figure, by applying electromagnetic fields of different frequencies and intensities, the stability of the medical endoscope cable under external electromagnetic field interference is tested, and the changes in the image signal intensity at each auxiliary punctuation point are observed, including:

[0114] In the absence of electromagnetic interference, the image signal intensity at each auxiliary punctuation point was recorded as the control group data;

[0115] Using an electromagnetic field generator, gradually applying an electromagnetic field to the outside of the medical endoscope cable according to a preset frequency and intensity range;

[0116] During the application of the electromagnetic field, the changes in the image signal intensity at each auxiliary punctuation point were observed and recorded as experimental group data;

[0117] Using the stability formula, calculate the stability of medical endoscope cables under external electromagnetic field interference of different frequencies and intensities;

[0118] The stability formula is:

[0119]

[0120] Where μ is the stability of the medical endoscope cable, α i is the image signal intensity at the i-th auxiliary mark in the control group, α i ' is the image signal intensity at the ith auxiliary mark of the experimental group, and n is the total number of auxiliary marks.

[0121] Under each frequency and intensity of the external electromagnetic field, a stable test needs to be maintained for a period of time to record the data. In order to ensure the reliability and accuracy of the test results, it is recommended to repeat the test for each test condition multiple times.

[0122] Reference Figure 6 As shown in the figure, the medical endoscope cable is modeled and analyzed using simulation software, the material and structure of the medical endoscope cable are input, and the transmission performance of the medical endoscope cable under different temperatures, humidity and pH is analyzed, including:

[0123] Comsol Multiphysics software was selected as the simulation software to model and analyze medical endoscope cables;

[0124] Input insulation protection layer materials, optical fiber materials and metal shielding layer materials as well as the structure between the materials;

[0125] According to the material information of the medical endoscope cable, the material properties of each part are set in the simulation software, wherein the material properties include electrical conductivity, dielectric constant and thermal conductivity;

[0126] By setting the environmental parameters of temperature, humidity and pH of the medical endoscope cable, the signal transmission of the cable in different environments is simulated;

[0127] Based on the analysis results, improve material selection and optimize structural design.

[0128] As the industry-leading multi-physics simulation platform, Comsol Multiphysics provides the functions of simulating a single physical field and flexibly coupling multiple physical fields, allowing engineers and researchers to accurately analyze equipment, processes and procedures in various engineering fields. The software's built-in model builder includes a complete modeling workflow that can realize all simulation steps from geometric modeling, material parameters and physical field settings, solving to result processing.

[0129] Further, based on the same inventive concept as the above-mentioned medical endoscope cable stability auxiliary analysis method, the present solution also proposes a medical endoscope cable stability auxiliary analysis device, comprising:

[0130] An electrical performance analysis module, which is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched through an impedance testing instrument, and to test the insulation impedance of the medical endoscope cable through a high voltage insulation resistance tester using an unbalanced bridge method;

[0131] A physical performance analysis module, the physical performance analysis module is used to evenly set at least one auxiliary punctuation point inside the medical endoscope cable, record the image signal strength at the auxiliary punctuation point, and evaluate the image signal attenuation at the auxiliary punctuation point of the medical endoscope cable under different lengths and bending conditions by setting at least one simulation experiment;

[0132] An electromagnetic compatibility analysis module, which is used to test the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities, and observe the changes in the image signal intensity at each auxiliary punctuation point, wrap a metal shielding layer on the outside of the medical endoscope cable, and test its stability again under external electromagnetic field interference of different frequencies and intensities;

[0133] An environmental adaptability analysis module is used to model and analyze the medical endoscope cable using simulation software, input the material and structure of the medical endoscope cable, and analyze the transmission performance of the medical endoscope cable under different temperatures, humidity and pH.

[0134] The electrical performance analysis module specifically includes:

[0135] An impedance matching judgment unit, which is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched through an impedance testing instrument;

[0136] An insulation impedance testing unit, which is used to test the insulation impedance of a medical endoscope cable using an unbalanced bridge method through a high voltage insulation resistance tester;

[0137] The physical performance analysis module specifically includes:

[0138] An auxiliary punctuation point setting unit, the auxiliary punctuation point setting unit is used to evenly set at least one auxiliary punctuation point inside the medical endoscope cable and record the image signal strength at the auxiliary punctuation point;

[0139] A physical performance testing unit, the physical performance testing unit is used to evaluate the attenuation of image signals at auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions by setting at least one simulation experiment;

[0140] The electromagnetic compatibility analysis module specifically includes:

[0141] A first electromagnetic immunity test unit, which is used to test the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities, and observe changes in image signal intensity at each auxiliary punctuation point;

[0142] The second electromagnetic immunity test unit is used to wrap a metal shielding layer on the outside of the medical endoscope cable and test its stability again under external electromagnetic field interference of different frequencies and intensities.

[0143] Further, based on the same inventive concept as the above-mentioned stability auxiliary analysis method for medical endoscope cables, the present solution also proposes a cable, comprising:

[0144] An insulating protective layer, which is located at the outermost layer of the cable and is used to prevent leakage current from occurring during the use of the medical endoscope cable and affecting the safety of patients or medical staff;

[0145] A metal shielding layer, which is located inside the insulating protective layer and is used to improve the stability of the medical endoscope cable under external electromagnetic field interference;

[0146] An optical fiber, which is located inside the metal shielding layer and is used to transmit image signals;

[0147] Auxiliary punctuation points, which are located in the inner layer of the optical fiber, are used to record the image signal strength at the auxiliary punctuation points so as to test the transmission performance of the medical endoscope cable under different conditions.

[0148] Furthermore, the present solution also proposes a computer-readable storage medium on which a computer-readable program is stored. When the computer-readable program is called, the above-mentioned medical endoscope cable stability auxiliary analysis method is executed.

[0149] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state drive (SSD).

[0150] To sum up, the advantages of the present invention are: by setting an electrical performance analysis module, a physical performance analysis module, an electromagnetic compatibility analysis module and an environmental adaptability analysis module, the transmission performance of the medical endoscope cable under different conditions is simulated and potential problem points are found, thereby ensuring the stability and safety of the medical endoscope system, thereby improving the quality of medical diagnosis and treatment, and providing strong support for the quality control and safety assessment of medical endoscopes.

[0151] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A stability auxiliary analysis method for a medical endoscope cable, characterized in that: include: Use an impedance tester to check whether the impedance of the connection between the medical endoscope cable and the endoscope camera host and display matches; The insulation impedance of medical endoscope cables is tested using a high voltage insulation resistance tester using the unbalanced bridge method; Evenly set at least one auxiliary mark point inside the medical endoscope cable, and record the image signal intensity at the auxiliary mark point; By setting up at least one simulation experiment, the image signal attenuation at the auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions is evaluated; By applying electromagnetic fields of different frequencies and intensities, the stability of the medical endoscope cable under external electromagnetic field interference is tested, and the changes in the image signal intensity at each auxiliary punctuation point are observed; Wrap a metal shielding layer around the medical endoscope cable and test its stability again under external electromagnetic field interference of different frequencies and intensities; The medical endoscope cable is modeled and analyzed using simulation software. The material and structure of the medical endoscope cable are input, and the transmission performance of the medical endoscope cable under different temperatures, humidity, and pH values ​​is analyzed.

2. A stability auxiliary analysis method for medical endoscope cables according to claim 1, characterized in that: The method of checking whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched by the impedance testing instrument specifically includes: Connect the output end of the impedance tester to the end of the medical endoscope cable connected to the endoscope camera host; Connect the input end of the impedance tester to the end of the medical endoscope cable connected to the monitor; Set the test frequency and impedance range parameters on the impedance tester, start the impedance tester, and start measuring; Draw a resistance-impedance diagram from the measurement results and calculate the phase angle in the image; The impedance formula is used to calculate the impedance of the connection between the medical endoscope cable and the endoscope camera host and display; Determine whether the impedance exceeds the preset impedance range. If so, the output impedance is not matched, the signal is reflected and attenuated, the image quality is affected, and the cable needs to be reconnected to the endoscope camera host and the display. If not, the output impedance is matched; The impedance formula is: Where X is the impedance of the connection between the medical endoscope cable and the endoscope camera host and display, R is the resistance value of the connection part, and θ is the phase angle in the resistance-impedance diagram.

3. A stability auxiliary analysis method for medical endoscope cables according to claim 2, characterized in that: The method of testing the insulation impedance of the medical endoscope cable by using the unbalanced bridge method through a high voltage insulation resistance tester specifically includes: Connect the positive terminal of the high voltage insulation resistance tester to the conductor portion of the medical endoscope cable; Connect the negative terminal of the high voltage insulation resistance tester to the insulation layer or grounding part of the medical endoscope cable; Add a switch and a resistor on each side, and change the equivalent resistance of the two poles to the ground by switching the switches on both sides alternately, so as to obtain the unbalanced detection voltage on the positive and negative detection resistors; The voltage on the positive and negative detection resistors changes with the switching cycle. When the insulation resistance of one pole becomes lower, the voltage on the detection resistor on that side becomes smaller, and the voltage on the corresponding detection resistor on the other side becomes larger. Based on the relationship between voltage and resistance in the circuit, calculate the insulation resistance of the positive and negative electrodes; Determine whether the insulation impedance of the positive and negative poles is less than the preset threshold. If so, the insulation of the output medical endoscope cable is unqualified and an insulating protective layer needs to be wrapped on the outermost layer of the cable. If not, the insulation of the output medical endoscope cable is qualified.

4. A stability auxiliary analysis method for medical endoscope cables according to claim 3, characterized in that: The step of setting at least one simulation experiment to evaluate the attenuation of image signals at auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions specifically includes: Setting up a first simulation experiment to test the image signal strength at each auxiliary punctuation point of the medical endoscope cable without being bent; A second simulation experiment is set up to test the change in the image signal intensity at the auxiliary mark point when the medical endoscope cable is bent at different angles before the auxiliary mark point; A third simulation experiment is set up to test the change in the image signal intensity at the auxiliary mark point when the medical endoscope cable is bent at different radii before the auxiliary mark point; By observing and recording the image quality on the image signal receiver, the image signal strength at each auxiliary punctuation point is indicated, and the image quality includes brightness, contrast and clarity; Based on the recorded data, plot the relationship between image signal attenuation and cable length, bend angle, and bend radius.

5. A stability auxiliary analysis method for medical endoscope cables according to claim 4, characterized in that: The method of testing the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities and observing the changes in the image signal intensity at each auxiliary punctuation point specifically includes: In the absence of electromagnetic interference, the image signal intensity at each auxiliary punctuation point was recorded as the control group data; Using an electromagnetic field generator, gradually applying an electromagnetic field to the outside of the medical endoscope cable according to a preset frequency and intensity range; During the application of the electromagnetic field, the changes in the image signal intensity at each auxiliary punctuation point were observed and recorded as experimental group data; Using the stability formula, calculate the stability of medical endoscope cables under external electromagnetic field interference of different frequencies and intensities; The stability formula is: Where μ is the stability of the medical endoscope cable, α i is the image signal intensity at the i-th auxiliary mark in the control group, α i ' is the image signal intensity at the ith auxiliary mark of the experimental group, and n is the total number of auxiliary marks.

6. A stability auxiliary analysis method for medical endoscope cables according to claim 5, characterized in that: The use of simulation software to model and analyze the medical endoscope cable, input the material and structure of the medical endoscope cable, and analyze the transmission performance of the medical endoscope cable under different temperatures, humidity and pH specifically includes: Comsol Multiphysics software was selected as the simulation software to model and analyze medical endoscope cables; Input insulation protection layer materials, optical fiber materials and metal shielding layer materials as well as the structure between the materials; According to the material information of the medical endoscope cable, the material properties of each part are set in the simulation software, wherein the material properties include electrical conductivity, dielectric constant and thermal conductivity; By setting the environmental parameters of temperature, humidity and pH of the medical endoscope cable, the signal transmission of the cable in different environments is simulated; Based on the analysis results, improve material selection and optimize structural design.

7. A stability auxiliary analysis device for a medical endoscope cable, used to implement a stability auxiliary analysis method for a medical endoscope cable as claimed in any one of claims 1 to 6, characterized in that: include: An electrical performance analysis module, which is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched through an impedance testing instrument, and to test the insulation impedance of the medical endoscope cable through a high voltage insulation resistance tester using an unbalanced bridge method; A physical performance analysis module, the physical performance analysis module is used to evenly set at least one auxiliary punctuation point inside the medical endoscope cable, record the image signal strength at the auxiliary punctuation point, and evaluate the image signal attenuation at the auxiliary punctuation point of the medical endoscope cable under different lengths and bending conditions by setting at least one simulation experiment; An electromagnetic compatibility analysis module, which is used to test the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities, and observe the changes in the image signal intensity at each auxiliary punctuation point, wrap a metal shielding layer on the outside of the medical endoscope cable, and test its stability again under external electromagnetic field interference of different frequencies and intensities; An environmental adaptability analysis module is used to model and analyze the medical endoscope cable using simulation software, input the material and structure of the medical endoscope cable, and analyze the transmission performance of the medical endoscope cable under different temperatures, humidity and pH.

8. The stability auxiliary analysis device for medical endoscope cables according to claim 7, characterized in that: The electrical performance analysis module specifically includes: An impedance matching judgment unit, which is used to check whether the impedance of the connection part between the medical endoscope cable and the endoscope camera host and the display is matched through an impedance testing instrument; An insulation impedance testing unit, which is used to test the insulation impedance of a medical endoscope cable using an unbalanced bridge method through a high voltage insulation resistance tester; The physical performance analysis module specifically includes: An auxiliary punctuation point setting unit, the auxiliary punctuation point setting unit is used to evenly set at least one auxiliary punctuation point inside the medical endoscope cable and record the image signal strength at the auxiliary punctuation point; A physical performance testing unit, the physical performance testing unit is used to evaluate the attenuation of image signals at auxiliary punctuation points of the medical endoscope cable under different lengths and bending conditions by setting at least one simulation experiment; The electromagnetic compatibility analysis module specifically includes: A first electromagnetic immunity test unit, which is used to test the stability of the medical endoscope cable under external electromagnetic field interference by applying electromagnetic fields of different frequencies and intensities, and observe changes in image signal intensity at each auxiliary punctuation point; The second electromagnetic immunity test unit is used to wrap a metal shielding layer on the outside of the medical endoscope cable and test its stability again under external electromagnetic field interference of different frequencies and intensities.

9. A cable for implementing the stability auxiliary analysis method of a medical endoscope cable as claimed in any one of claims 1 to 6, characterized in that: include: An insulating protective layer, which is located at the outermost layer of the cable and is used to prevent leakage current from occurring during the use of the medical endoscope cable and affecting the safety of patients or medical staff; A metal shielding layer, which is located inside the insulating protective layer and is used to improve the stability of the medical endoscope cable under external electromagnetic field interference; An optical fiber, which is located inside the metal shielding layer and is used to transmit image signals; Auxiliary punctuation points, which are located in the inner layer of the optical fiber, are used to record the image signal strength at the auxiliary punctuation points so as to test the transmission performance of the medical endoscope cable under different conditions.

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