Method for detecting deterioration of rope and medical imaging apparatus therefor

Abstract

The embodiment of the invention provides a deterioration detection method and device of a rope for medical imaging equipment and the medical imaging equipment, the medical imaging equipment comprises a suspension device and a detector, the suspension device comprises a telescopic cylinder, an X-ray source is installed on the telescopic cylinder, and the detector is connected with the telescopic cylinder. The X-ray source and the detector can be matched to obtain a medical image of a detected object, at least one rope is arranged in the telescopic cylinder, and the method comprises the steps that voltage is applied to connecting points of at least two ends of the at least one rope, and current flowing through the connecting points or resistance between the connecting points is measured; and judging the degradation state of the at least one rope according to the relevant parameters of the current or the relevant parameters of the resistance.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical imaging technology, and in particular to a method for detecting degradation of a rope used in medical imaging equipment and the medical imaging equipment. Background Art

[0002] In an X-ray imaging system, radiation from an X-ray source is directed toward a subject, which is typically a patient in medical diagnostic applications. A portion of the radiation passes through the subject and strikes a detector, which is divided into a matrix of discrete elements (e.g., pixels). The detector elements are read out to produce an output signal based on the amount or intensity of radiation striking each pixel area. The signal can then be processed to produce a medical image that can be displayed for inspection, which can be displayed in a display device of the X-ray imaging system. Summary of the invention

[0003] The embodiment of the present application provides a method for detecting degradation of a rope used in medical imaging equipment and the medical imaging equipment thereof.

[0004] According to one aspect of an embodiment of the present application, a method for detecting degradation of a rope used in a medical imaging device is provided. The medical imaging device includes a suspension device and a detector. The suspension device includes a telescopic cylinder. An X-ray source is installed on the telescopic cylinder. The X-ray source and the detector can cooperate to obtain a medical image of a detected object. At least one rope is arranged inside the telescopic cylinder. The method includes:

[0005] applying voltage to connection points at at least two ends of the at least one rope, measuring current flowing through the connection points or measuring resistance between the connection points;

[0006] The degradation state of the at least one rope is determined based on the parameter related to the current or based on the parameter related to the resistance.

[0007] According to one aspect of an embodiment of the present application, a medical imaging device is provided, the medical imaging device comprising a suspension device and a detector, the suspension device comprising a telescopic cylinder, an X-ray source is mounted on the telescopic cylinder, the X-ray source and the detector can cooperate to obtain a medical image of a detected object, at least one rope is arranged inside the telescopic cylinder, and the medical imaging device further comprises:

[0008] A rope degradation detection circuit is connected to at least two ends of the at least one rope, applies voltage to connection points at at least two ends of the at least one rope, measures current flowing through the connection points or measures resistance between the connection points, and determines the degradation state of the at least one rope based on relevant parameters of the current or relevant parameters of the resistance.

[0009] With reference to the following description and accompanying drawings, the specific implementation of the embodiment of the present application is disclosed in detail, indicating the way in which the principle of the embodiment of the present application can be adopted. It should be understood that the implementation of the present application is not limited in scope. Within the scope of the spirit and clauses of the attached claims, the implementation of the present application includes many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other implementation methods can be obtained based on these drawings without creative work. In the drawings:

[0011] Figure 1 is a schematic diagram of a medical imaging system according to an embodiment of the present application;

[0012] Figure 2 is a schematic structural diagram of the retractable cylinder 113 of an embodiment of the present application;

[0013] Figure 3 It is a schematic diagram of the principle of the synchronous transmission structure of an embodiment of the present application;

[0014] Figure 4 is a schematic diagram of a method for detecting degradation of a rope for medical imaging equipment according to an embodiment of the present application;

[0015] Figures 5 to 7 is a schematic diagram of the connection between the rope and the rope degradation detection circuit of an embodiment of the present application;

[0016] Figures 8 to 10 Schematic diagram of the corresponding relationship between the wear degree and the relevant parameters of the resistance in the embodiment of the present application;

[0017] Fig.11 is a schematic diagram of a rope degradation detection circuit according to an embodiment of the present application;

[0018] Fig.12 is a cross-sectional schematic diagram of a retractable tube according to an embodiment of the present application;

[0019] Fig.13 is a schematic diagram of the insulation structure of the anchor point A side of an embodiment of the present application;

[0020] Fig.14 is a schematic diagram of the insulation structure on the anchor point B side of an embodiment of the present application;

[0021] Fig.15 It is a schematic diagram of the insulation structure of the bottom end of the pulley in an embodiment of the present application. DETAILED DESCRIPTION

[0022] With reference to the accompanying drawings, the foregoing and other features of the embodiments of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the embodiments of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the embodiments of the present application include all modifications, variations and equivalents that fall within the scope of the attached claims.

[0023] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not represent the spatial arrangement or time sequence of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the terms listed in association. The terms "comprise", "include", "have", etc. refer to the existence of the stated features, elements, components or components, but do not exclude the existence or addition of one or more other features, elements, components or components. In the present application, the words "connect", "connected", "coupled", etc. and the like involved in the embodiments are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly.

[0024] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0025] Features described and / or shown for one embodiment may be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. The term "includes / comprising" when used herein refers to the presence of a feature, an entirety, a step, or a component, but does not exclude the presence or addition of one or more other features, entireties, steps, or components.

[0026] Figure 1 1 is a medical imaging system 100 according to an embodiment of the present application. Figure 1 As shown, the medical imaging system 100 includes a suspension device 110, a wall stand device 120, and a test bed device 130. The suspension device 110 includes a guide rail assembly, a telescopic cylinder 113, a trolley 114, and a tube assembly 115.

[0027] The guide rail assembly includes a vertically arranged longitudinal guide rail 111 and a transverse guide rail 112, wherein the longitudinal guide rail 111 is installed on the ceiling, and the transverse guide rail 112 is installed on the longitudinal guide rail 111. The telescopic cylinder 113 is used to carry the ball tube assembly 115.

[0028] For ease of description, in the present application, the x-axis, y-axis and z-axis are defined as the x-axis and y-axis are located in a horizontal plane and are perpendicular to each other, and the z-axis is perpendicular to the horizontal plane. Specifically, the direction of the longitudinal guide rail 111 is defined as the x-axis direction, the direction of the transverse guide rail 112 is defined as the y-axis direction, and the extension direction of the retractable cylinder 113 is defined as the z-axis direction, and the z-axis direction is the vertical direction.

[0029] The longitudinal guide rail 111 and the transverse guide rail 112 are vertically arranged, wherein the longitudinal guide rail 111 is installed on the ceiling, and the transverse guide rail 112 is installed on the longitudinal guide rail 111. The telescopic cylinder 113 is used to carry the ball tube assembly 115.

[0030] The pulley 114 is arranged between the transverse guide rail 112 and the telescopic cylinder 113. The suspension device further includes a driving assembly (not shown in the figure). The driving assembly is arranged in the pulley 114. The driving assembly may include a rotating shaft, a motor, a reel and other components. The motor can drive the reel to rotate around the rotating shaft, thereby driving the telescopic cylinder 113 to move along the z-axis and / or slide relative to the transverse guide rail. The pulley 114 can slide relative to the transverse guide rail 112, that is, the pulley 114 can drive the telescopic cylinder 113 and / or the ball tube assembly 115 to move along the y-axis direction. And the transverse guide rail 112 can slide relative to the longitudinal guide rail 111, thereby driving the telescopic cylinder 113 and / or the ball tube assembly 115 to move along the x-axis direction.

[0031] The telescopic cylinder 113 can drive the ball tube assembly to move along the z-axis direction. The lower end of the telescopic cylinder 113 is also provided with a rotating part, which can drive the ball tube assembly 115 to rotate.

[0032] The tube assembly 115 includes an X-ray tube that can generate X-rays and project X-rays to a desired region of interest ROI of the patient. Specifically, the X-ray tube can be positioned adjacent to a beam limiter that is used to align the X-rays to the desired region of interest of the patient. At least a portion of the X-rays can be attenuated by the patient and can be incident on the detector 121 / 131.

[0033] The suspension device 110 further includes a beam limiter 117, which is usually installed below the X-ray tube. The X-rays emitted by the X-ray tube are irradiated onto the object to be inspected through the opening of the beam limiter 117. The size of the opening of the beam limiter 117 determines the irradiation range of the X-rays, that is, the size of the exposure field of view (FOV). The lateral position of the X-ray tube and the beam limiter 117 determines the position of the exposure field of view FOV on the object to be inspected. It is well known that X-rays are harmful to the human body, so it is necessary to control the X-rays so that they only irradiate the part of the object to be inspected that needs to be inspected, that is, the region of interest (ROI).

[0034] The suspension device 110 further includes a tube control device (console) 116, which is installed on the tube assembly. The tube control device 116 includes a user interface such as a display screen and control buttons for performing pre-shooting preparations, such as patient selection, protocol selection, and positioning.

[0035] The movement of the suspension device 110 includes the movement of the tube assembly along the x-axis, y-axis and z-axis, and the rotation of the tube assembly in the horizontal plane (the rotation axis is parallel to or coincident with the z-axis) and in the vertical plane (the rotation axis is parallel to the y-axis). In the above-mentioned movement, a motor is usually used to drive the corresponding component to rotate and thus achieve the corresponding movement or rotation, and the corresponding control component is generally installed in the pulley 114. The X-ray imaging unit further includes a motion control unit (not shown in the figure), which can control the above-mentioned movement of the suspension device 110. Further, the motion control unit can receive a control signal to control the corresponding component to perform a corresponding movement.

[0036] The column device 120 includes a first detector assembly 121, a column 122 and a connecting portion 123. The connecting portion 123 includes a support arm connected perpendicularly to the height direction of the column 122 and a rotating bracket installed on the support arm. The first detector assembly 121 is installed on the rotating bracket. The column device 120 further includes a detector driving device arranged between the rotating bracket and the first detector assembly 121. Under the drive of the detector driving device, the first detector assembly 121 moves along a direction parallel to the height direction of the column 122 on the plane supported by the rotating bracket. The first detector assembly 121 can also be further rotated relative to the support arm to form a certain angle with the column. The first detector assembly 121 has a plate-like structure, and its direction is variable so that the X-ray incident surface becomes vertical or horizontal according to the incident direction of the X-ray.

[0037] The detection bed device 130 includes a second detector assembly 131. The selection or use of the first detector assembly 121 and the second detector assembly 131 can be determined based on the patient's shooting part and / or shooting protocol, and can also be determined based on the position of the object to be detected obtained by camera shooting, so as to perform shooting inspections in the supine or standing position. Figure 1 Only an example diagram of the column and the detection bed is shown. Those skilled in the art should understand that columns and / or detection beds of any form or arrangement may be selected, or only columns may be installed. The columns and / or detection beds do not limit the entire scheme of the present application.

[0038] In some embodiments, the medical imaging system includes a camera 140 (e.g., a camera), which can be used to capture the detected object to obtain a captured image containing the detected object, such as a static optical image or a series of frame optical images in a dynamic real-time video stream, to assist in positioning and exposure settings, etc. The camera can be installed on a suspension device, such as on the side of the beam limiter 117, etc., and the embodiments of the present application are not limited to this. The camera 140 includes one or more cameras, such as a digital camera, an analog camera, etc., or a depth camera, an infrared camera, or an ultraviolet camera, etc., or a 3D camera, a 3D scanner, etc., or a red, green, and blue (RGB) sensor, an RGB depth (RGB-D) sensor, or other devices that can capture color image data of a target object.

[0039] In some embodiments, the control device may include a source controller and a detector controller. The source controller is used to command the X-ray source to emit X-rays for image exposure. The detector controller is used to select a suitable detector from a plurality of detectors and coordinate the control of various detector functions, for example, automatically selecting a corresponding detector according to the position or posture of the object to be detected, or performing various signal processing and filtering functions, specifically, for initial adjustment of the dynamic range, interleaving of digital image data, etc. In some embodiments, the control device may provide power and timing signals for controlling the operation of the X-ray source and the detector.

[0040] In some embodiments, the control device may also be configured to use the digitized signals to reconstruct one or more desired images and / or determine useful diagnostic information corresponding to the patient, wherein the control device may include one or more dedicated processors, graphics processing units, digital signal processors, microcomputers, microcontrollers, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other appropriate processing devices.

[0041] Of course, the medical imaging system may also include other numbers or configurations or forms of control devices, for example, the control device may be local (e.g., co-located with one or more medical imaging systems 100, such as in the same facility and / or the same local network); in other implementations, the control device may be remote and therefore only accessible via a remote connection (e.g., via the Internet or other available remote access technology). In a specific implementation, the control device may also be configured in a cloud-like manner and may be accessed and / or used in a manner substantially similar to accessing and using other cloud-based systems.

[0042] The system 100 also includes a storage device (not shown), and the processor can store the digitized signal in the storage. For example, the storage can include a hard disk drive, a floppy disk drive, a CD-ROM read / write drive, a digital universal disk drive, a flash drive, and / or a solid-state memory. The storage can also be integrated with the processor to effectively use the floor space and / or meet the expected imaging requirements.

[0043] In one embodiment, the system 100 further includes an operator workstation that allows a user to receive and evaluate reconstructed images, as well as input control instructions (operation signals or control signals). The operator workstation may include a user interface (or user input device), such as a keyboard, a mouse, a voice-activated controller, or any other suitable input device, in some form of an operator interface, through which an operator can input operation signals / control signals to a control device.

[0044] Figure 2 Schematic diagram of the structure of the retractable cylinder 113 in the embodiment of the present application. Figure 2 As shown, the telescopic cylinder 113 includes a plurality of cylindrical cylinders with different inner diameters ( Figure 2 5 are shown), and the multiple cylindrical tubes can be sequentially mounted in the cylindrical tube located above them from bottom to top to achieve telescoping. The telescopic tube 113 can be telescoped up and down (or moved) by a synchronous transmission structure arranged on the inner side thereof and wound on a pulley driven by a motor.

[0045] Figure 3 Schematic diagram of the synchronous transmission structure principle of the embodiment of the present application. Figure 3 As shown, Figure 2Take the five cylindrical tubes W0-W4 in the figure as an example, wherein five cylindrical tubes W4, W3, W2, W1, and W0 are arranged in sequence from the outermost side to the innermost side, and a pulley is arranged at the lower end of each cylindrical tube W1, W2, and W3 in the middle of the outermost side and the innermost side, and two adjacent cylindrical tubes are connected by a rope, wherein the two ends of the rope T1 pass around the lower end pulley of W1 and are respectively connected to the upper ends of W0 and W2, the two ends of the rope T2 pass around the lower end pulley of W2 and are respectively connected to the upper ends of W1 and W3, and the two ends of the rope T3 pass around the lower end pulley of W3 and are respectively connected to the upper ends of W2 and W4. Therefore, W0-W4 can realize synchronous movement and upward and downward extension via the above-mentioned synchronous transmission structure.

[0046] For the synchronous transmission structure, rope wear (deterioration) is one of the common faults, which may cause rope breakage in severe cases, which may bring potential danger to the user who is undergoing medical examination under the telescopic cylinder 113. Therefore, regular maintenance or replacement of the rope is necessary. The current solution is to improve the safety factor of the rope, increase the diameter of the rope wheel, or add lubrication during the manufacturing step. However, once the telescopic cylinder 113 is installed, since the synchronous transmission structure is hidden inside the telescopic cylinder 113, it is difficult to visually confirm the status of the internal rope without opening the telescopic cylinder, resulting in difficulty in maintenance or inspection.

[0047] Currently, common inspection methods for ropes used in other fields include visual inspection, but this method can only see problems with the rope strands on the outer surface of the rope, and cannot check problems with the inner strands of the rope. It may be misled by the grease on the rope, and because the position of the hanging retractable cylinder is high and the space is small, visual inspection is more difficult. In addition, electromagnetic testers can be used for inspection. This method is usually used for ropes in mines, cranes, elevators, etc., but the equipment is expensive and is not suitable for medical imaging equipment because electromagnetic testers may cause electromagnetic interference (EMC\EMI) problems in the hospital environment.

[0048] In order to solve at least one of the above problems, the present invention provides a method and device for detecting degradation of a rope for medical imaging equipment and the medical imaging equipment thereof. The present invention is described in detail below.

[0049] The present application embodiment provides a method for detecting degradation of a rope used in medical imaging equipment. For the structure of the medical imaging equipment, please refer to Figure 1 and Figure 2 , but not Figure 1 and Figure 2As a limitation. For example, the medical imaging device includes a suspension device and a detector, the suspension device includes a telescopic cylinder, an X-ray source is installed on the telescopic cylinder, the X-ray source and the detector can cooperate to obtain a medical image of the object being detected, the telescopic cylinder includes a plurality of (M, M is an integer greater than 2) layers of cylindrical cylinders nested with each other, a pulley is provided at the lower end of each cylindrical cylinder of the middle (M-2) layer, and M-2 ropes are further provided inside the telescopic cylinder corresponding to the M-2 layer, for example, for the rope V of the Vth (V is greater than 1 and less than M) layer of cylindrical cylinder, one end of the rope V is connected to the upper end of the adjacent V-1th layer of cylindrical cylinder, and the other end is connected to the upper end of the adjacent V+1th layer of cylindrical cylinder after passing around the pulley.

[0050] Figure 4 Schematic diagram of a method for detecting degradation of a rope for medical imaging equipment according to an embodiment of the present application. Figure 4 As shown, the method includes:

[0051] 401, applying voltage to connection points at at least two ends of the at least one rope, measuring current flowing through the connection points or measuring resistance between the connection points;

[0052] 402 : Determine a degradation state of the at least one rope according to a parameter related to the current or according to a parameter related to the resistance.

[0053] In some embodiments, the degradation state of one of the M-2 ropes can be detected, or the degradation state of each of the M-2 ropes can be detected simultaneously, or the M-2 ropes can be connected in series first, and then the degradation state of the M-2 ropes can be detected as a whole, and the embodiments of the present application are not limited to this. For example, when M is greater than 3, a voltage is applied to the connection points at both ends of one of the M-2 ropes; or a voltage is applied to the connection points at both ends of each of the M-2 ropes; or a voltage is applied to the connection points at both ends of the M-2 ropes connected in series.

[0054] In some embodiments, the two ends of the ropes in the aforementioned various situations can be connected to the rope degradation detection circuit through a lead, wherein one end of a lead is connected to one end of the rope, and the other end of the lead is connected to the rope degradation detection circuit as the aforementioned connection point, and the lead can be retracted and folded. For example, the lead can be an elastic spiral wire or a tank chain, etc., and the embodiments of the present application are not limited to this. By setting the above-mentioned lead, it can cooperate with the extension of the telescopic tube during the elongation movement without breaking, thereby ensuring the normal operation of the degradation detection. In addition, it will not interfere with other components in the telescopic tube, nor will it interfere with the telescopic movement of the telescopic tube.

[0055] Figures 5 to 7This is a schematic diagram of the connection between the rope and the rope degradation detection circuit of the embodiment of the present application. Figures 5 to 7 The rope degradation detection circuit will be described in detail in the following embodiments in conjunction with the attached Fig.11 Provide explanation.

[0056] For example, Figure 5 As shown, the degradation state of one of the aforementioned M-2 ropes can be detected. For example, the rope corresponding to the middlemost cylindrical tube may be the rope that is most susceptible to wear. A voltage can be applied to the connection points at both ends of the rope, wherein the two ends of the rope (located at the upper ends of two adjacent cylindrical tubes) can be respectively connected to an elastic spiral wire 501, and the other ends of the two elastic spiral wires are used as connection points to be connected to the rope degradation detection circuit to apply a voltage to both ends of the rope.

[0057] For example, Figure 6 As shown, the degradation state of each of the M-2 ropes can be detected. For example, a voltage can be applied to the connection points at both ends of each rope, wherein the two ends of each rope can be connected to an elastic spiral wire 601 respectively, and the other ends of the two elastic spiral wires are used as connection points to connect to the rope degradation detection circuit (the connection method is the same as Figure 5 similar to one of the ropes in the diagram) to apply voltage to both ends of each rope simultaneously.

[0058] For example, Figure 7 As shown, M-3 elastic spiral wires 701 can be used to respectively connect one end of different ropes at the upper ends of adjacent cylindrical tubes to connect M-2 ropes in series, and voltage can be applied to the connection points at both ends of the ropes connected in series (the rope end located at the upper end of the innermost cylindrical tube and the rope end located at the upper end of the outermost cylindrical tube), each of which is connected to an elastic spiral wire 702, and the other ends of the two elastic spiral wires are used as connection points and connected to a rope degradation detection circuit to apply voltage to both ends of the ropes connected in series.

[0059] In some embodiments, the rope includes a steel wire rope, which is twisted into P (P is an integer greater than 2, such as P = 7) bundles of rope strands, and the number of steel wires (galvanized steel wires or stainless steel wires, etc.) in each strand may be the same, but the specific number of steel wires Q is not limited. The steel wire rope itself can be used as a conductor to transmit current, and the steel wire rope also has resistance in nature. Therefore, the steel wire rope itself can be regarded as a micro-resistance, and the size of the micro-resistance satisfies the following formula: R'=ρ×L / S, where ρ represents the resistivity of the steel wire rope conductor, L represents the length of the steel wire rope, and S represents the cross-sectional area of ​​the steel wire rope conductor. In other words, if the steel wire rope is worn (or even broken), the cross-sectional area S will change, the micro-resistance value will also change, and the current will also change when the applied voltage remains unchanged. Therefore, the degradation state of the at least one rope can be determined based on the relevant parameters of the current or the relevant parameters of the resistance.

[0060] The following first describes the method of determining the rope degradation state based on resistance-related parameters as an example.

[0061] In some embodiments, after applying voltage, the current flowing through the connection point is measured (for example, using a current transformer, which will be described in detail in the embodiments described below), and the resistance between the connection points is calculated based on the voltage and current. For example, the current at the connection point can be measured in real time, or the average value of the current flowing through the connection point within a fixed period can be measured, or the instantaneous value of the current flowing through the connection point can be measured at fixed time intervals to calculate the resistance between the connection points. The embodiments of the present application are not limited to this.

[0062] In some embodiments, whether the rope is worn can be qualitatively determined based on the relationship between the relevant parameters of the resistance and the threshold value, or the degree of wear of the rope can be quantitatively determined based on the corresponding relationship between the relevant parameters of the resistance and the pre-acquired relevant parameters and the degree of wear, as illustrated below.

[0063] In some embodiments, the relevant parameters of the resistance include at least one of the absolute value of the resistance, the relative value of the resistance change, and the rate of change of the relative value of the resistance change. Among them, the relevant parameters C1, C2, C3..., CN,.... of the resistance at moments t1, t2, t3, ....., tN,... are obtained in sequence, and the intervals between adjacent moments are fixed, for example, an interval of 1 minute, or an interval of 1 hour, or an interval of 1 day, or an interval of 1 month. The absolute value R of the resistance refers to the ratio of the aforementioned applied voltage to the measured current. The absolute value of the resistance can be the instantaneous absolute value at moments t1, t2, t3, ....., tN, or the average value of the resistance measured within [0~t1], [t1~t2], [t2~t3]...; the relative value ΔR of the resistance change refers to the difference between the absolute value of the resistance measured at the current moment (or time period) and the previous moment (or time period), for example, the absolute value of the resistance at moment t1 minus the absolute value of the resistance at moment t0 is taken as the relative value of the resistance change at moment t1. , the absolute value of the resistance at time t2 minus the absolute value of the resistance at time t1 is taken as the relative value of the resistance change at time t2, the absolute value of the resistance at time t3 minus the absolute value of the resistance at time t2 is taken as the relative value of the resistance change at time t3, and so on; the rate of change of the relative value of the resistance change is equal to the gradient of change of the relative value of the resistance change, for example, the slope of change of ΔR at time t2 relative to ΔR at time t1 is taken as the rate of change of ΔR at time t2, the slope of change of ΔR at time t3 relative to ΔR at time t2 is taken as the rate of change of ΔR at time t3, and so on.

[0064] In some embodiments, it is possible to qualitatively determine whether the rope is worn. When the aforementioned related parameters change at different monitoring moments and the change exceeds a threshold value, it is determined that the rope between the connection points is worn. For example, when the relevant parameter is the absolute value of the resistance, assuming that the absolute value of the resistance measured at the initial moment is R, the threshold value can be set to 10%R, that is, when the absolute value RN of the resistance obtained at the current moment tN changes relative to R, and the difference between RN-R is greater than or equal to 10%R, it is determined that the rope between the connection points is worn. Alternatively, when the aforementioned related parameters exceed the threshold value at different monitoring moments, it is determined that the rope between the connection points is worn. For example, when the relevant parameter is the relative value of the resistance change, assuming that the absolute value of the resistance measured at the initial moment is R, the threshold value can be set to 10%R, that is, when the relative value of the resistance change obtained at the current moment tN is greater than or equal to 10%R, it is determined that the rope between the connection points is worn. Wherein, the threshold value can be determined in advance based on experiments, and examples are not given here one by one.

[0065] In some embodiments, the degree of wear of the rope can be quantitatively determined, and the method can also include: predetermining the correspondence between the degree of wear of the rope and relevant parameters; and, in 402, based on the measured relevant parameters and the corresponding relationship, determining that the state of the rope between the connection points is the degree of wear corresponding to the measured relevant parameters.

[0066] For ease of understanding, the following first explains the principle of quantitatively determining the degree of rope wear based on this corresponding relationship.

[0067] As mentioned above, the steel wire rope is twisted from P bundles of rope strands, each bundle of rope strands has Q thin steel wires. If the steel wire rope is worn (or even broken), the cross-sectional area S will change, and the micro-resistance value will also change. The number of worn (or broken) rope strands or thin steel wires is different, the cross-sectional area is different, and the corresponding micro-resistance value is also different; therefore, the relevant parameters of the resistance corresponding to the break of different numbers of thin steel wires can be obtained in advance through experiments, and the corresponding relationship between the relevant parameters of the resistance and the degree of wear (hereinafter expressed as wear percentage, the wear percentage is equal to the number of broken (worn) rope strands / P, or equal to the number of broken (worn) thin steel wires / P×Q) can be obtained through fitting. According to this corresponding relationship, the degree of wear of the rope can be quantitatively determined. The following example illustrates how to obtain this corresponding relationship, taking P=7 as an example.

[0068] In some embodiments, relevant parameters corresponding to multiple rope samples with different degrees of wear can be obtained; the obtained multiple relevant parameters are fitted with a high-order polynomial to obtain a fitting function after fitting, and the fitting function is used as the corresponding relationship. For example, the relevant parameter is the absolute value of resistance. For an unworn wire rope sample (fixed length), the same voltage as the voltage applied in 401 is applied to both ends of the wire rope (the wire rope can also be connected to the rope degradation detection circuit through the same lead), the current flowing through the wire rope is measured, and the resistance value R0 of the unworn wire rope is calculated. For a wire rope sample with a broken strand (equivalent to a wire rope wear degree of 15%), the same voltage as the voltage applied in 401 is applied to both ends of the wire rope (the wire rope can also be connected to the rope degradation detection circuit through the same lead), the current flowing through the wire rope is measured, and the resistance value R0 of the broken strand is calculated. The resistance value R1 of the wire rope with bundled rope strands (artificially processed) is applied to both ends of the wire rope sample with two broken rope strands (equivalent to 29% wear degree of the wire rope), and the same voltage as that applied in 401 is applied to both ends (the wire rope can also be connected to the rope degradation detection circuit through the same lead wire), and the current flowing through the wire rope is measured, and the resistance value R2 of the wire rope with two broken rope strands is calculated. For the wire rope sample with three broken rope strands (equivalent to 43% wear degree of the wire rope), the same voltage as that applied in 401 is applied to both ends (the wire rope can also be connected to the rope degradation detection circuit through the same lead wire), The current flowing through the wire rope is measured, and the resistance value R3 of the wire rope with three strands broken is calculated. For the wire rope sample with four strands broken (equivalent to 57% wear of the wire rope), the same voltage as that applied in 401 is applied to both ends (the wire rope can also be connected to the rope degradation detection circuit through the same lead wire), the current flowing through the wire rope is measured, and the resistance value R4 of the wire rope with four strands broken is calculated. For the wire rope sample with five strands broken (equivalent to 71% wear of the wire rope), the same voltage as that applied in 401 is applied to both ends (the wire rope can also be connected to the rope degradation detection circuit through the same lead wire). The current flowing through the wire rope is measured, and the resistance value R5 of the wire rope with five strands broken is calculated. For the wire rope sample with six strands broken (equivalent to 86% wear of the wire rope), the same voltage as that applied in 401 is applied to both ends (the wire rope can also be connected to the rope degradation detection circuit through the same lead), the current flowing through the wire rope is measured, and the resistance value R6 of the wire rope with six strands broken is calculated. For the wire rope sample with seven strands broken (equivalent to 100% wear of the wire rope), it is equivalent to a complete break of the wire rope, and its resistance value can be regarded as infinite. According to (0%, R0), (15%, R1), (29%, R2), (43%, R3), (57%, R4), (71%, R5), (86%, R6), a high-order polynomial fitting is performed to obtain a fitting curve. Figure 8 is a schematic diagram of the fitting curve, such as Figure 8 As shown, the fitting curve is in the form of a quasi-exponential function distribution, that is, as the wear percentage increases, the resistance value increases quasi-exponentially. The fitting curve can reflect the corresponding relationship between any wear percentage and the absolute value of the resistance.

[0069] In some embodiments, considering that the micro-resistance value is relatively small, the change of R0~R6 may be very small. In order to improve the fitting accuracy, further amplify the impact of wire rope breakage (wear) on the resistance value, and further improve the resolution of degradation detection, the relevant parameters may include the relative value of the resistance change or the rate of change of the relative value of the resistance change. For example, when the relevant parameter is the relative value of the resistance change, a high-order polynomial fitting can be performed according to (15%, R1-R0), (29%, R2-R1), (43%, R3-R2), (57%, R4-R3), (71%, R5-R4), (86%, R6-R5), that is, a fitting curve can be obtained. Fig. 9 is a schematic diagram of the fitting curve, such as Fig. 9 As shown, the fitting curve is in the form of a quasi-exponential function distribution, that is, as the wear percentage increases, the relative value of the resistance change also increases exponentially. The fitting curve can reflect the corresponding relationship between any wear percentage and the relative value of the resistance change. For example, when the relevant parameter is the rate of change of the relative value of the resistance change, the rate of change K0 of the relative value of the resistance change in the wear degree range of 0% to 15% can be calculated according to (0%, 0), (15%, R1-R0), the rate of change K1 of the relative value of the resistance change in the wear degree range of 15% to 29% can be calculated according to (15%, R1-R0), (29%, R2-R1), the rate of change K2 of the relative value of the resistance change in the wear degree range of 29% to 43% can be calculated according to (29%, R2-R1), (43%, R3-R2), and the rate of change K3 of the relative value of the resistance change in the wear degree range of 29% to 43% can be calculated according to (43%, R3-R3). -R2), (57%, R4-R3) calculate the relative value change rate K3 of the resistance change in the range of 43% to 57% wear degree, according to (57%, R4-R3), (71%, R5-R4) calculate the relative value change rate K4 of the resistance change in the range of 57% to 71% wear degree, according to (71%, R5-R4), (86%, R6-R5) calculate the relative value change rate K5 of the resistance change in the range of 71% to 86% wear degree, according to K0, K1, K2, K3, K4, K5 for high-order polynomial fitting, that is, the fitting curve can be obtained, Fig.10 is a schematic diagram of the fitting curve, such as Fig.10 As shown, the fitting curve is in the form of a quasi-exponential function distribution, that is, as the wear percentage increases, the rate of change of the relative value of the resistance change also increases quasi-exponentially. The fitting curve can reflect the corresponding relationship between the wear percentage range and the rate of change of the relative value of the resistance change.

[0070] The above takes P=7, the length of a steel wire rope, as an example to illustrate how to determine the corresponding relationship. In order to more comprehensively cope with different monitoring scenarios, different rope parameters, such as steel wire ropes of length L (including multiple steel wire ropes in series), steel wire ropes with a number of strands P, and steel wire ropes with a number of thin steel wires Q, can be used to determine their respective corresponding relationships for different related parameter types, that is, a corresponding relationship database can be obtained in advance. The corresponding relationship database is shown in Table 1 below:

[0071] Table 1

[0072] Absolute value Relative value of change The rate of change of the relative value of the change L1,P1,Q1 Correspondence 1 Correspondence 2 Correspondence 3 L1,P2,Q1 Correspondence 4 Correspondence 5 Correspondence 6 L1,P2,Q1 Correspondence 7 Correspondence 8 Correspondence 9 .... .... .... .... L2,P1,Q1 Corresponding relation Z Corresponding relationship Z+1 Corresponding relationship Z+2 ... .... .... .... LZ,PZ,QZ Corresponding relationship Z+U Corresponding relationship Z+U+1 Corresponding relationship Z+U+2 ... .... .... ....

[0073] That is to say, when detecting the deterioration state of the rope, the corresponding relationship matching the L, P, Q and related parameter types of the rope to be detected can be retrieved from the above database according to the parameters L, P, Q and related parameter types of the rope to be detected, and then quantitative detection can be performed according to the matched corresponding relationship. In the database, when P is larger, the fitting curve will be smoother and the corresponding relationship will be more accurate.

[0074] For example, for Figure 7 In the scenario, the degradation status of M-2 (for example, 3) ropes in series is detected. Figure 5 and Figure 6 In the scenario, the degradation state of a single rope is detected, that is, Figure 7 The length of the rope detected in Figure 5 and Figure 6 is longer, so in Figure 7 The corresponding relationship used in the degradation detection of the scene is Figure 5 and Figure 6 The corresponding relationship used in the degradation detection of the scene is different. In addition, it should be noted that when the corresponding relationship is predetermined, for the scene where multiple ropes are connected in series, the multiple ropes can be connected using the same lead wire as in the actual degradation detection to ensure the accuracy of the detection. Alternatively, the resistance value of the lead wire can be obtained in advance, and the resistance value of the (one or more) lead wires can be subtracted from the absolute value of the resistance calculated above to obtain the resistance value of the rope, which will not be repeated here.

[0075] The above describes how to obtain the correspondence relationship in advance. The following describes how to quantitatively determine the degree of rope wear based on the correspondence relationship.

[0076] In some embodiments, the relevant parameters C1, C2, C3..., CN,.... of the resistance at time t1, t2, t3, ....., tN,... are obtained in sequence. The acquisition method is as described above and will not be repeated here. The relevant parameters of the resistance at each time are compared with the corresponding relationship to determine the wear degree (or wear degree range) of the rope corresponding to each time. For example, after obtaining the relevant parameter C1 at time tN, CN is compared with the corresponding relationship, and CN is substituted into the corresponding quasi-exponential function to find the corresponding wear degree (or wear degree range). For example, when the relevant parameter is the absolute value of the resistance, the absolute value of the resistance obtained at time tN is substituted into Figure 8 In the quasi-exponential function distribution, determine the corresponding horizontal axis value, that is, determine the corresponding wear degree. When the relevant parameter is the relative value of the resistance change, substitute the relative value of the resistance change into Fig. 9 In the quasi-exponential function distribution, the corresponding horizontal axis value is determined, that is, the corresponding wear degree is determined. When the relevant parameter is the rate of change of the relative value of the resistance change, the rate of change of the relative value of the resistance change is substituted into Fig.10 In the quasi-exponential function distribution, the corresponding horizontal coordinate value is determined, that is, the corresponding wear degree (range) is determined, etc., and the embodiments of the present application are not limited to this. For example, in order to improve the detection accuracy, 2 or 3 related parameters can also be measured, and 2 or 3 rope wear degree determination results can be obtained based on the comparison results of the 2 or 3 related parameters and their respective corresponding relationships, and the determination result with the larger wear degree among the 2 or 3 rope wear degree determination results is used as the final rope wear degree determination result, or the average of the wear degrees among the 2 or 3 rope wear degree determination results is used as the final rope wear degree determination result. Examples are not given one by one here.

[0077] The above description is made by taking the relevant parameters of the resistance as an example. The implementation method of determining the rope degradation state according to the relevant parameters of the current is similar to the implementation method of determining the rope degradation state according to the relevant parameters of the resistance. For example, different detection scenarios ( Figure 5 or Figure 6 or Figure 7 ) The correspondence between different rope wear degrees and related parameters of the current is determined based on the measured related parameters of the current and the corresponding relationship, and examples are not given here one by one.

[0078] In some embodiments, when the rope is qualitatively determined to be worn according to the aforementioned method, or when the degree of rope wear is quantitatively determined to be greater than a preset wear percentage (e.g., 10%) according to the aforementioned method, an early warning signal is generated to prompt maintenance personnel to maintain or replace the rope.

[0079] The above embodiments are merely exemplary of the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0080] The present application also provides a medical imaging device. For the structure of the medical imaging device, please refer to Figure 1 and Figure 2 , but not Figure 1 and Figure 2 As a restriction. Figure 1 and Figure 2 The structural difference is that the medical imaging device also includes a rope degradation detection circuit, which applies a voltage to the connection points at at least two ends of the at least one rope, measures the current flowing through the connection points or measures the resistance between the connection points, and determines the degradation state of the at least one rope based on relevant parameters of the current or relevant parameters of the resistance.

[0081] Fig.11 is a schematic diagram of the rope degradation detection circuit of an embodiment of the present application. Fig.11 As shown, the rope degradation detection circuit includes:

[0082] A voltage converter 1101, which is used to convert the power supply voltage into a supply voltage;

[0083] A current transformer 1102, which is used to measure the current flowing through the circuit;

[0084] The processor 1103 is configured to determine current-related parameters or resistance-related parameters according to the supply voltage and the measured current, and determine a degradation state of the at least one rope according to the current-related parameters or the resistance-related parameters.

[0085] In some embodiments, the rope degradation detection circuit may be integrated on a mainboard of a medical imaging device, or may be independent of the mainboard of the medical imaging device, for example, the rope degradation detection circuit may be configured separately from the mainboard of the medical imaging device, for example, the rope degradation detection circuit may be configured as a circuit board connected to the mainboard of the medical imaging device. The embodiments of the present application are not limited thereto.

[0086] In some embodiments, the processor 1103 may be independent of the main controller of the medical imaging device. For example, the processor 1103 may be configured separately from the main controller of the medical imaging device. For example, the processor 1103 may be configured as a chip connected to the main controller of the medical imaging device. Alternatively, the function of the processor 1103 may be integrated into the main controller of the medical imaging device. For how the processor determines the degradation state of the at least one rope, reference may be made to the aforementioned embodiments, which will not be described in detail here.

[0087] In some embodiments, the voltage converter 1101 is connected to the power supply of the medical imaging device. Since the rope resistance is a micro resistance, the voltage converter 1101 can convert the power supply of the medical imaging device (for example, 220V) into a micro voltage (for example, 5V, but the embodiments of the present application are not limited to this). The conversion method includes voltage division, voltage transformation, etc. For details, please refer to the relevant technology, which will not be repeated here.

[0088] In some embodiments, the rope degradation detection circuit may further include a lead wire, one end of which is connected to the circuit (e.g., PCB board), and the other end of which is connected to the rope to be tested. The lead wire is the elastic spiral wire as described above, which is used to connect to the two ends of the rope in the retractable tube. For example, the lead wire is two, such as Figure 5 As shown, the two ends of an independent rope in the telescopic cylinder are respectively connected (located at the upper end of the inner cylindrical cylinder adjacent to the cylindrical cylinder where the pulley around which the rope is located and the upper end of the outer cylindrical cylinder); as Figure 7 As shown, first use elastic spiral wires to connect one end of each of the different ropes at the upper ends of adjacent cylindrical tubes, so as to connect all the ropes in series, and then connect the two ends of the ropes in series (located at the upper end of the innermost cylindrical tube and the upper end of the outermost cylindrical tube). Figure 6 As shown, each pair of leads are respectively connected to the two ends of an independent rope in the telescopic cylinder (located at the upper end of the inner cylindrical cylinder adjacent to the cylindrical cylinder where the pulley around which the rope is located and the upper end of the outer cylindrical cylinder).

[0089] In some embodiments, in order to prevent the components of the medical imaging device (such as the telescopic tube) from affecting the measurement of the above-mentioned current or resistance and introducing unnecessary errors, when the rope degradation detection circuit is connected to the rope end in the telescopic tube of the medical imaging device through the lead wire, it is necessary to insulate part of the medical imaging device. Figure 5 Taking the insulation treatment as an example, as mentioned above, the rope degradation detection circuit connects the upper end of the inner cylindrical tube W1 (hereinafter referred to as anchor point B) and the upper end of the outer cylindrical tube W3 (hereinafter referred to as anchor point A) adjacent to the cylindrical tube W2 where the pulley is located through the lead wire.

[0090] Fig.12is a cross-sectional schematic diagram of the telescopic tube of an embodiment of the present application, such as Fig.12 As shown, the pulley fixing point D at the bottom end of the cylindrical tube W2, the upper end B of the cylindrical tube W1, and the upper end A of the cylindrical tube W3 all need to be insulated to achieve accurate resistance or current measurement.

[0091] Fig.13 Schematic diagram of the insulation structure (second insulation structure) on the side of the anchor point A in the embodiment of the present application, Fig.13 As shown, at the anchor point A, the pressure ring is hung on the column, the column is pressed on the screw, and there are two nuts on the screw to fix one end of the wire rope. In addition, the support plate (hanging plate) is fixed to the upper end E and upper end F of the telescopic cylinder W3 by screws 1301, and a plastic sleeve gasket 1302 is added under the head of each screw 1301, thereby achieving far-end insulation. In addition, a plastic thin gasket 1303 can be set on the end face of the through hole of the hanger plate (that is, a plastic thin gasket 1303 is set between the rod of the screw 1301 and the end face of the through hole). The plastic thin gasket 1303 includes a cylindrical wall portion 13031 and a bent portion 13032 bent from the upper end of the cylindrical wall portion to the outer peripheral side. The bent portion 13032 presses on the hanger plate, and is located between the plastic sleeve gasket 1302 (which is pressed on the bent portion 13032) and the hanger plate, thereby further isolating the cylindrical tube and the wire rope, so that the current passing through the lead will not flow to the E and F sides, but will only flow to the wire rope and the lead.

[0092] Fig.14 Schematic diagram of the insulation structure (first insulation structure) on the anchor point B side of the embodiment of the present application, as shown in Fig.14 As shown, the other end of the steel wire rope is fixed to the wall of the cylindrical barrel W1 by pressing the metal ring 1402 through the screw 1401, and a plastic sleeve gasket 1403 is pressed on the outer peripheral side of the metal ring 1402, thereby achieving insulation treatment, and the current passing through the anchor point B will not flow to the cylindrical barrel or the metal ring, but will only flow to the steel wire rope and the lead wire. The plastic sleeve gasket 1403 may include a cylindrical wall portion 14031 and bent portions 14032 and 14033 bent from both ends of the cylindrical wall portion to the outer peripheral side, the bent portion 14032 is attached to the wall of the cylindrical barrel W1, and the bent portion 14033 is attached to the screw head and the protruding position of the metal ring, thereby further isolating the steel wire rope and the metal ring.

[0093] Fig.15 Schematic diagram of the insulation structure D at the bottom end of the pulley (third insulation structure) of the embodiment of the present application, as shown in Fig.15As shown, the pulley is fixed on an L-shaped mechanical part 1501, and the L-shaped mechanical part is fixed on the lower bottom plate surface of the cylindrical barrel W2 by two conical countersunk screws 1502. At the bottom end of the pulley, a conical plastic sleeve gasket 1503 is set between the countersunk screw 1502 and the lower bottom plate, that is, the conical plastic sleeve gasket 1503 is stuck in the joint between the head of the countersunk screw 1502 and the middle of the lower bottom plate, thereby achieving insulation treatment, and the current of the steel wire rope passing through the bottom end of the pulley will not flow to the G and H sides of the lower bottom plate of the cylindrical barrel, but will only flow along the steel wire rope. In addition, a plastic thin gasket 1504 can be set between the L-shaped mechanical part and the lower bottom plate, thereby further improving the insulation effect. In addition, the pulley can also be set as a plastic pulley to further improve the insulation effect, which will not be exemplified one by one here.

[0094] The above gasket is described by taking plastic as an example, but the present application embodiment is not limited to this, and other insulating materials are also within the protection scope of the present application. Figure 5 The insulation structure is explained as an example of the connection method in Figure 6 or Figure 7 The insulation structure of the connection method is similar, and will not be illustrated here one by one.

[0095] In some embodiments, the medical imaging equipment may further include a display device, which can display a graphical user interface, which can display relevant parameters of the current current or resistance, and display the degradation state (degree of wear) of at least one rope determined based on the relevant parameters of the current or resistance. When the degree of wear of the rope is greater than a preset wear percentage (for example, 10%), an early warning signal is generated and displayed to prompt maintenance personnel to maintain or replace the rope.

[0096] In some embodiments, the storage device of the medical imaging device may also pre-store the corresponding relationship database in the aforementioned embodiments, and the processor 1103 may be connected to the storage device to obtain the corresponding relationship for quantitative rope wear degree detection. In addition, the storage device may also store the rope wear degree determined at multiple moments, and the display device may display the rope wear degree change curve for reference by maintenance personnel.

[0097] An embodiment of the present application provides a method for detecting degradation of a rope for medical imaging equipment and the medical imaging equipment thereof, wherein a voltage is applied to connection points at at least two ends of at least one rope arranged in a telescopic cylinder in the medical imaging equipment, and the current flowing through the connection points is measured or the resistance between the connection points is measured; the degradation state of the at least one rope is determined according to relevant parameters of the current or according to relevant parameters of the resistance, thereby making it easy to detect the degradation state of the rope hidden in the telescopic cylinder of the medical imaging equipment, and to maintain or replace the rope when wear is detected, thereby avoiding potential dangers to users performing medical examinations due to rope breakage.

[0098] In addition, the embodiments of the present application support the detection of multiple ropes in series, or the independent detection of a single rope, or the simultaneous independent detection of multiple ropes. The detection methods are flexible and diverse to meet the needs of different scenarios.

[0099] In addition, whether the rope is worn can be qualitatively determined based on the relationship between the relevant parameters of the resistance and the threshold value, or the degree of wear of the rope can be quantitatively determined based on the corresponding relationship between the relevant parameters of the resistance and the pre-acquired relevant parameters and the degree of wear.

[0100] In addition, the relevant parameters corresponding to multiple rope samples with different degrees of wear are obtained; the obtained multiple relevant parameters are fitted with a high-order polynomial to obtain a fitting function. The fitting curve can reflect the corresponding relationship between any wear percentage and the relevant parameters of resistance, thereby more accurately and quantitatively determining the degree of rope wear.

[0101] In addition, the rope degradation detection circuit is connected to the rope through a lead wire, and can extend with the rope during the extension movement of the telescopic tube without breaking, thereby ensuring the normal operation of the degradation detection.

[0102] In addition, by performing insulation treatment on some positions of the medical imaging device, it is possible to avoid the components of the medical imaging device (such as the telescopic cylinder) affecting the measurement of the above-mentioned current or resistance and introducing unnecessary errors.

[0103] The above devices and methods of the present application can be implemented by hardware, or by hardware combined with software. The present application relates to such a computer-readable program, which, when executed by a logic component, enables the logic component to implement the above-mentioned devices or components, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0104] The method / device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of the functional block diagrams may correspond to various software modules of the computer program flow or to various hardware modules. These software modules may correspond to the various steps shown in the figure, respectively. These hardware modules may be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0105] The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in a memory of a mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0106] For one or more of the functional blocks described in the drawings and / or one or more combinations of functional blocks, it can be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof for performing the functions described in the present application. For one or more of the functional blocks described in the drawings and / or one or more combinations of functional blocks, it can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0107] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the principles of the present application, and these modifications and variations are also within the scope of the present application.

Claims

1. A method for detecting degradation of a rope used in medical imaging equipment, wherein the medical imaging equipment comprises a suspension device and a detector, wherein the suspension device comprises a telescopic cylinder, an X-ray source is mounted on the telescopic cylinder, and the X-ray source and the detector can cooperate to obtain a medical image of a detected object, and at least one rope is arranged inside the telescopic cylinder, wherein: The method comprises: applying voltage to connection points at at least two ends of the at least one rope, measuring current flowing through the connection points or measuring resistance between the connection points; The degradation state of the at least one rope is determined based on the parameter related to the current or based on the parameter related to the resistance.

2. The method according to claim 1, characterized in that The related parameter includes at least one of the absolute value of the current or the resistance, the relative value of the change of the current or the resistance, and the rate of change of the relative value of the change of the current or the resistance.

3. The method according to claim 1, characterized in that: Determining the degradation state of the at least one rope according to the relevant parameters of the current or according to the relevant parameters of the resistance includes: when the relevant parameters change and the change exceeds a threshold value, or when the relevant parameters exceed a threshold value, determining that the rope between the connection points is worn.

4. The method according to claim 1, characterized in that: The method further comprises: Predetermine the correspondence between the degree of rope wear and related parameters; Furthermore, based on the measured related parameters and the corresponding relationship, it is determined that the rope state between the connection points is a wear degree corresponding to the measured related parameters.

5. The method according to claim 4, characterized in that The correspondence between different degrees of rope wear and different relevant parameters is predetermined, including: Obtain relevant parameters corresponding to a plurality of rope samples with different degrees of wear; A high-order polynomial fitting is performed on the acquired multiple related parameters to obtain a fitting function after fitting, and the fitting function is used as the corresponding relationship.

6. The method according to claim 1, characterized in that The at least one rope includes a plurality of ropes, and applying voltage to connection points at at least two ends of the at least one rope includes: applying a voltage to connection points at both ends of one of the plurality of ropes; or, applying a voltage to connection points at both ends of each of the plurality of ropes; or, A voltage is applied to connection points at both ends of the plurality of ropes connected in series.

7. A medical imaging device, characterized in that: The medical imaging device comprises a suspension device and a detector, wherein the suspension device comprises a retractable cylinder, an X-ray source is mounted on the retractable cylinder, the X-ray source and the detector can cooperate to obtain a medical image of the detected object, and at least one rope is arranged inside the retractable cylinder, wherein the medical imaging device further comprises: A rope degradation detection circuit is connected to at least two ends of the at least one rope, applies voltage to connection points at at least two ends of the at least one rope, measures current flowing through the connection points or measures resistance between the connection points, and determines the degradation state of the at least one rope based on relevant parameters of the current or relevant parameters of the resistance.

8. The medical imaging device according to claim 7, characterized in that: The rope degradation detection circuit is connected to at least both ends of the at least one rope via lead wires.

9. The medical imaging device according to claim 7, characterized in that: The telescopic cylinder includes a plurality of sleeved cylindrical cylinders, a first insulating structure is arranged at the upper end of the inner cylindrical cylinder adjacent to the cylindrical cylinder where the pulley is located around each rope, a second insulating structure is arranged at the upper end of the outer cylindrical cylinder adjacent to the cylindrical cylinder where the pulley is located around each rope, and a third insulating structure is arranged at the bottom end of the pulley.

10. The medical imaging device according to claim 9, characterized in that The first insulating structure, the second insulating structure, and the third insulating structure include insulating spacers.

11. The medical imaging device according to claim 9, characterized in that: The pulley is an insulating pulley.

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