Fault diagnosis system and method for optical coherence tomography imaging catheter

Abstract

The present invention discloses a fault diagnosis system and method for an optical coherence tomography imaging catheter, wherein the catheter to be tested comprises a pipe section to be tested and a connecting section at an end opposite to the pipe section to be tested, and the fault diagnosis system for the optical coherence tomography imaging catheter comprises a measuring device, an external driving module and a controller, wherein the measuring device is used to install the pipe section to be tested of the catheter to be tested, measure the actual rotation speed of the pipe section to be tested, and output a first pulse signal representing the actual rotation speed of the pipe section to be tested; the external driving module is drivingly connected to the connecting section of the catheter to be tested; the controller is electrically connected to the external driving module and the measuring device respectively, and the controller is configured to: obtain in real time a first pulse signal used by the measuring device to represent the actual rotation speed of the pipe section to be tested and a second pulse signal outputting the rotation speed by the external driving module.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a fault diagnosis system and method for an optical coherence tomography imaging catheter. Background Art

[0002] Optical Coherence Tomography (OCT) is a non-invasive imaging technology that uses near-infrared light to obtain high-resolution images of biological tissues. OCT technology can be used, for example, in the treatment of cardiovascular diseases. Generally, medical devices based on OCT technology include imaging catheters and drive modules. Traditional OCT imaging catheters generally include imaging probes and catheter cavities. Among them, the imaging probe mainly includes a developing ring, an optical fiber, a traction wire, a torque tube and an optical fiber connector. The optical fiber plays the role of beam transmission and signal collection. The outside of the optical fiber is protected by a traction wire, and during high-speed rotation, the traction wire drives the optical fiber to rotate. A developing ring is provided at the farthest end of the traction wire, which is used to track the position of the imaging point in the blood vessel in real time under X-rays. The torque tube provides force transmission for the high-speed rotation of the traction wire. The optical fiber connector at the proximal end is used to achieve mechanical docking and optical fiber alignment between the imaging catheter and the motion control part, and the motion control part provides power to drive the imaging probe to complete the rotation and retraction functions.

[0003] In practical applications, since the torque tube is generally a metal spring tube with a thin outer diameter, it is easy to lose power when transmitting force from near to far under high-speed rotation, resulting in the rotation speed deviation of the imaging catheter from near to far at different sections. In addition, in order to avoid problems, they cannot be discovered in time. Therefore, it is necessary to provide a fault diagnosis method for optical coherence tomography imaging catheters.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a fault diagnosis system and method for an optical coherence tomography imaging catheter, aiming to solve the above-mentioned technical problems in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides a fault diagnosis system for an optical coherence tomography imaging catheter, which is used to diagnose a catheter to be tested, wherein the catheter to be tested includes a tube section to be tested and a connecting section at an end opposite to the tube section to be tested, and the fault diagnosis system for an optical coherence tomography imaging catheter includes:

[0007] A measuring device, used for installing the pipe section to be measured of the pipe to be measured, measuring the actual rotation speed of the pipe section to be measured, and outputting a first pulse signal representing the actual rotation speed of the pipe section to be measured;

[0008] An external driving module is drivingly connected to the connecting section of the catheter to be tested;

[0009] A controller is electrically connected to the external driving module and the measuring device, respectively, and the controller is configured as follows:

[0010] Real-time acquisition of a first pulse signal of the measuring device used to characterize the actual rotation speed of the pipe section to be measured and a second pulse signal of the output rotation speed of the external driving module;

[0011] Calculating the time difference between the rising edges of the first pulse signal and the second pulse signal;

[0012] According to the change of the time difference, abnormal information of the catheter to be tested is diagnosed, including:

[0013] When the time difference increases first and then decreases and remains in a stable state within a first preset time period, it is determined that the pipe section to be tested and the connecting section of the pipe to be tested are not synchronized; and / or,

[0014] When the catheter to be tested is in a stable state, when the time difference first increases and then remains constant, it is determined that the catheter to be tested is affected by external pressure; and / or,

[0015] When it is determined that the catheter to be tested is affected by the external pressure and the time difference first decreases and then remains constant, it is determined that the external pressure on the catheter to be tested is cancelled; and / or,

[0016] When the catheter to be tested is in a stable state and the time difference changes irregularly, it is determined that the spring wire in the catheter to be tested has failed.

[0017] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the controller is further configured to:

[0018] Acquire an acceleration time difference between a first pulse signal and a second pulse signal corresponding to when the catheter to be tested accelerates from a first rotation speed to a second rotation speed within a second preset time length;

[0019] Calculating an absolute time difference during the acceleration process of the catheter to be tested according to the acceleration time difference and the stabilization time difference when the catheter to be tested is in a stable state;

[0020] Determining the length of the spring wire in the catheter to be tested according to the absolute time difference;

[0021] The first preset time length is determined according to the length of the spring wire in the catheter to be tested.

[0022] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, in calculating the absolute time difference during the acceleration process of the catheter to be tested based on the acceleration time difference and the stabilization time difference when the catheter to be tested is in a stable state, the absolute time difference=acceleration time difference-stabilization time difference.

[0023] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the controller is further configured to:

[0024] According to the absolute time difference, querying the length of the spring wire in the catheter to be tested in a pre-established first mapping table, wherein the first mapping table includes a mapping relationship between the absolute time difference and the length of the spring wire; and / or,

[0025] According to the length of the spring wire in the catheter to be tested, the first preset time length is queried in a pre-established second mapping table, and the second mapping table includes a mapping relationship between the length of the spring wire and the first preset time length.

[0026] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the controller is further configured to:

[0027] When the catheter to be tested is in a stable state, when the time difference first increases and then remains constant within a second preset time period, it is determined that the catheter to be tested is affected by external pressure;

[0028] When it is determined that the catheter to be tested is affected by the external pressure, and the time difference first decreases and then remains constant within a third preset time period, it is determined that the external pressure on the catheter to be tested is cancelled;

[0029] The second preset time length and the third preset time length are determined according to the length of the catheter to be tested.

[0030] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the controller is further configured to:

[0031] When the catheter to be tested is in a stable state, obtaining time differences between a plurality of adjacent pulse rising edges of the first pulse signal and the second pulse signal;

[0032] Calculating the change rates of the multiple time differences according to the time differences of the multiple adjacent pulse rising edges;

[0033] When the change rate is greater than a first preset threshold, it is determined that the spring wire in the catheter to be tested has failed.

[0034] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the controller is further configured to:

[0035] When the catheter to be tested is in a stable state, obtaining time differences between a plurality of adjacent pulse rising edges of the first pulse signal and the second pulse signal;

[0036] The fluctuation value is calculated according to the time difference between the rising edges of multiple adjacent pulses. The calculation formula of the fluctuation value is:

[0037] ;

[0038] Among them, K n is the fluctuation value;

[0039] n is the number of time differences between the rising edges of multiple pulses obtained;

[0040] x i is the time difference of the selected i rising edges;

[0041] is the average value of the time difference of multiple pulse rising edges obtained;

[0042] When the fluctuation value is greater than a second preset threshold, it is determined that the spring wire in the catheter to be tested has failed.

[0043] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the measuring device comprises:

[0044] A base is formed with a detection cavity and a channel connected to the detection cavity, the base is provided with a light shielding device at least at each side wall of the detection cavity, and the channel extends transversely to penetrate at least one end outer wall of the base, so that the catheter to be tested can be movably inserted therethrough to drive the tube section to be tested to be exposed in the detection cavity; and

[0045] A photosensor is disposed in the detection cavity and is spaced apart beside the channel. The sensing surface of the photosensor faces the channel and triggers a sensing signal when receiving light emitted from the pipe section to be tested during the rotation of the pipe to be tested. The photosensor is electrically connected to the controller.

[0046] Preferably, in the fault diagnosis system for optical coherence tomography imaging catheter, the measuring device further comprises a cannula arranged in a transparent shape, the inner diameter of the cannula is equivalent to the outer diameter of the catheter to be measured, and the cannula is used for the catheter to be measured to be movably inserted;

[0047] The insert tube is fixedly inserted into the passage, or the insert tube is movably and adjustably inserted into the passage in the transverse direction.

[0048] To achieve the above-mentioned object, the present invention provides a fault diagnosis method for an optical coherence tomography imaging catheter, which is used to diagnose a catheter to be tested, wherein the catheter to be tested includes a tube section to be tested and a connecting section at an end opposite to the tube section to be tested. The fault diagnosis method for an optical coherence tomography imaging catheter includes:

[0049] Real-time acquisition of a first pulse signal of a measuring device used to characterize the actual rotation speed of the pipe section to be measured and a second pulse signal of the rotation speed output by an external drive module, wherein the measuring device is used to install the pipe section to be measured of the pipe to be measured and measure the actual rotation speed of the pipe section to be measured, and the external drive module is drivingly connected to the connecting section of the pipe to be measured;

[0050] Calculating the time difference between the rising edges of the first pulse signal and the second pulse signal;

[0051] According to the change of the time difference, abnormal information of the catheter to be tested is diagnosed, including:

[0052] When the time difference increases first and then decreases and remains in a stable state within a first preset time period, it is determined that the pipe section to be tested and the connecting section of the pipe to be tested are not synchronized; and / or,

[0053] When the catheter to be tested is in a stable state, when the time difference first increases and then remains constant, it is determined that the catheter to be tested is affected by external pressure; and / or,

[0054] When it is determined that the catheter to be tested is affected by the external pressure and the time difference first decreases and then remains constant, it is determined that the external pressure on the catheter to be tested is cancelled; and / or,

[0055] When the catheter to be tested is in a stable state and the time difference changes irregularly, it is determined that the spring wire in the catheter to be tested has failed.

[0056] The present invention has at least the following beneficial effects:

[0057] The fault diagnosis system for an optical coherence tomography imaging catheter provided by the present invention is used to diagnose a catheter to be tested, wherein the catheter to be tested includes a pipe section to be tested and a connecting section at an end opposite to the pipe section to be tested. The fault diagnosis system for an optical coherence tomography imaging catheter includes a measuring device, an external driving module, and a controller. The measuring device is used to install the pipe section to be tested of the catheter to be tested, measure the actual rotation speed of the pipe section to be tested, and output a first pulse signal representing the actual rotation speed of the pipe section to be tested; the external driving module is drivingly connected to the connecting section of the catheter to be tested; the controller is electrically connected to the external driving module and the measuring device, respectively, and the controller is configured to: obtain in real time a first pulse signal used by the measuring device to represent the actual rotation speed of the pipe section to be tested and a second pulse signal output by the external driving module for the rotation speed; calculate The method comprises the following steps: determining the time difference between the rising edges of the first pulse signal and the second pulse signal; diagnosing abnormal information of the catheter to be tested according to the change of the time difference, including: determining that the tested pipe section and the connecting section of the catheter to be tested are not synchronized when the time difference first increases and then decreases and remains stable within a first preset time period; determining that the catheter to be tested is affected by external pressure when the time difference first increases and then remains constant when the catheter to be tested is in a stable state; determining that the catheter to be tested is affected by external pressure when it is determined that the catheter to be tested is affected by external pressure and the time difference first decreases and then remains constant; determining that the external pressure on the catheter to be tested is cancelled when the time difference first decreases and then remains constant when the catheter to be tested is in a stable state, and determining that the spring wire in the catheter to be tested is failed when the time difference changes irregularly, so that the fault of the catheter used for optical coherence tomography imaging can be quickly diagnosed.

[0058] Furthermore, since the catheter to be tested is in a natural state, once it is in a stable state, the pulse difference at both ends of the catheter to be tested is a constant value. When at a constant rotation speed, the time difference between the rising edges of the first pulse signal and the second pulse signal changes irregularly and is in a failed state. If the failed state of the catheter to be tested is not detected in time, image jitter will occur in actual use, which will cause great obstacles for doctors to read the image. The present invention can measure whether the catheter to be tested is in a failed state by determining that the spring wire in the catheter to be tested is failed when the time difference between the rising edges of the first pulse signal and the second pulse signal changes irregularly when the catheter to be tested is in a stable state. This can avoid the situation where the doctor uses the catheter and the spring wire is in a failed state and the situation of low accuracy and poor effect occurs.

[0059] Furthermore, the measuring device provided by the present invention, when it is necessary to measure the rotation speed of the pipe section to be tested of the pipe to be tested, firstly, the pipe to be tested is inserted into the through hole, so that the pipe section to be tested is exposed in the detection cavity and is within the sensing range of the photosensitive sensor. Then, the external driving module connected to the driving of the pipe to be tested is operated to start running, driving the pipe section to be tested to rotate around its own axis. During the rotation process, the light directly emitted by the light source device fixed at the preset side wall of the pipe section to be tested, or the light reflected by the preset side wall of the pipe section to be tested from the external light source device, will be periodically received by the sensing surface of the photosensitive sensor, so that the photosensitive sensor can regularly trigger at least one sensing signal every time the pipe section to be tested rotates one circle. The sensing signal can be subsequently used for comparison and analysis with the output signal of the external driving module, and finally obtain the output rotation speed of the external driving module and the deviation data between the actual rotation speed at the pipe section to be tested. Since the photosensitive sensor as a whole is spaced from the pipe to be tested, non-contact detection can also be achieved. Compared with contact detection, the present invention helps to eliminate the adverse load generated by the detection device during the rotation process of the pipe section to be tested; and combined with the light shielding setting at the detection cavity, the light can be sensed by the photosensitive sensor more accurately and efficiently. The present invention helps to simplify the detection structure and detection operation, and improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A schematic diagram of a fault diagnosis system for an optical coherence tomography imaging catheter provided by the present invention;

[0061] Figure 2 A schematic diagram of a fault diagnosis method for an optical coherence tomography imaging catheter provided by the present invention;

[0062] Figure 3 A diagram showing changes in the first pulse signal and the second pulse signal provided by the present invention;

[0063] Figure 4 for Figure 3 Schematic diagram of fault diagnosis results;

[0064] Figure 5 A schematic diagram of the main structure decomposition of a first embodiment of a rotation speed measuring device for an optical coherence tomography imaging catheter provided by the present invention;

[0065] Figure 6 for Figure 5 A schematic top view of a rotation speed measuring device for an optical coherence tomography imaging catheter;

[0066] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at AA in the middle;

[0067] Figure 8 A schematic diagram of the main structure decomposition of a second embodiment of a rotation speed measuring device for an optical coherence tomography imaging catheter provided by the present invention;

[0068] Fig. 9 for Figure 8 A schematic top view of a rotation speed measuring device for an optical coherence tomography imaging catheter;

[0069] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure at BB in the middle;

[0070] Fig.11 for Figure 8 A three-dimensional schematic diagram of the mounting bracket;

[0071] Fig.12 for Figure 8 A side view of the mounting bracket;

[0072] Fig.13 A schematic diagram of a computer device provided by the present invention.

[0073] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0074] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0075] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0076] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0077] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0078] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0079] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are proposed in order to enable the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0080] Figure 1 FIG. 1 is a schematic diagram of a fault diagnosis system for an optical coherence tomography imaging catheter provided by the present invention. Figure 1 The present invention provides a fault diagnosis system for an optical coherence tomography imaging catheter, which is used to diagnose a catheter to be tested 400, wherein the catheter to be tested 400 includes a tube section to be tested 410 and a connecting section 420 at an end opposite to the tube section to be tested 410. The fault diagnosis system for an optical coherence tomography imaging catheter includes a measuring device, an external driving module 500, and a controller 600.

[0081] The measuring device is used to install the pipe section 410 to be tested of the pipe 400 to be tested, measure the actual rotation speed of the pipe section 410 to be tested, and output a first pulse signal representing the actual rotation speed of the pipe section 410 to be tested. The external driving module 500 is drivingly connected to the connecting section 420 of the pipe 400 to be tested. The controller 600 is electrically connected to the external driving module 500 and the measuring device, respectively. In specific operation, after the external driving module 500 drives the connecting section 420 of the pipe 400 to be tested to rotate, the pipe section 410 to be tested is linked to rotate, and the controller 600 can obtain the first pulse signal representing the actual rotation speed of the pipe section 410 to be tested, and the second pulse signal of the rotation speed output by the external driving module 500.

[0082] Figure 2 The process of the fault diagnosis method for optical coherence tomography imaging catheter provided by the present invention is schematically shown. The process can be used Figure 1 The controller 600 in the embodiment may be used to execute the process, or any other suitable computer device may be used to execute the process.

[0083] In step S1001, the first pulse signal of the measuring device used to characterize the actual rotation speed of the pipe section 410 to be measured and the second pulse signal of the output rotation speed of the external drive module 500 are obtained in real time. Specifically, after the external drive module 500 works stably, the controller 600 is turned on for a certain period of time (for example, 1 second) and the counting of two PWMs is turned on at the same time. After the timing time ends, the input values ​​of the two PWMs are counted respectively, wherein the input value of the PWM characterizing the actual rotation speed of the pipe section 410 to be measured is recorded as the first pulse signal, and the input value of the PWM characterizing the output rotation speed of the external drive module 500 is recorded as the second pulse signal.

[0084] In step S1002, the time difference between the rising edges of the first pulse signal and the second pulse signal is calculated. In order to ensure that the statistical data is correct and reliable, each set of data (one data from each of the two PWMs) is usually sampled during the sampling period. Figure 3 and Figure 4 ), calculate the time difference of the rising edges of these two pulses.

[0085] In step S1003, abnormal information of the catheter 400 to be tested is diagnosed according to the change of the time difference, which includes step S1003a, step S1003b, step S1003c, and step S1003d.

[0086] In step S1003a, when the time difference first increases and then decreases and remains stable within the first preset time period, it is determined that the tube section 410 to be tested and the connecting section 420 of the catheter 400 to be tested are not synchronized.

[0087] It is worth noting that, when the rotation speed is stable, the time difference between the rising edges of the first pulse signal and the second pulse signal is fixed. Once the rotation speed at the tooling is inconsistent (for example, acceleration or deceleration occurs), the time difference between the rising edges of the first pulse signal and the second pulse signal will change. In addition, the first pulse signal and the second pulse signal may be unstable within a unit time, for example, sometimes fast and sometimes slow. Although the total rotation speed of the two ends of the tested conduit 400 (the connecting section 420 and the tested pipe section 410) is consistent, there is actually a lack of synchronization during the process.

[0088] It should be noted that the first preset time length is determined by the length of the spring wire of the catheter to be tested 400. The first preset time length represents the period for the catheter to be tested 400 to tend to a stable state. The lengths of the spring wires of the catheter to be tested 400 are different, and the corresponding first preset time lengths are also different. The longer the length of the spring wire, the longer the first preset time length, that is, the longer the period of tending to stability. In addition, if the spring wire of the catheter to be tested 400 is too short, it will affect the performance of the catheter to be tested 400; if the spring wire of the catheter to be tested 400 is too long, the period of tending to stability will be longer, so it is necessary to calculate the length of the spring wire of the catheter to be tested 400, so as to improve the accuracy of fault diagnosis.

[0089] It should be emphasized that when the catheter 400 to be tested is in a stable state, the time difference between the rising edges of the first pulse signal and the second pulse signal will also tend to be stable. Therefore, to determine whether the tested pipe section 410 and the connecting section 420 of the tested catheter 400 are synchronized, it is necessary to obtain the first pulse signal and the second pulse signal within a first preset time period after the external driving module 500 is turned on and works stably, so that it can be accurately determined whether the tested pipe section 410 and the connecting section 420 are synchronized.

[0090] It is worth noting that the catheter 400 to be tested mentioned in the present invention is in a stable state, which means that the time difference between the rising edges of the first pulse signal and the second pulse signal are continuously collected, and the multiple time differences are all within the preset range, which is considered to be a stable state. The specific preset range can be determined according to the accuracy. Figure 4 As shown, after the rotation speed is stabilized, the time difference between the rising edges of the continuously collected multiple first pulse signals and the second pulse signals tends to be fixed.

[0091] The first preset duration is determined by executing steps S1101 to S1104.

[0092] In step S1101, the acceleration time difference between the first pulse signal and the second pulse signal corresponding to the acceleration of the catheter 400 from the first speed to the second speed within the second preset time period is obtained. Usually, the second preset time period is 1 second.

[0093] In step S1102, the absolute time difference during the acceleration process of the catheter 400 to be tested is calculated according to the acceleration time difference and the stable time difference when the catheter 400 to be tested is in a stable state.

[0094] It should be noted that when the catheter 400 to be tested tends to be stable, the data collected by the encoder disk of the external drive module 500 and the measuring device at the same time have a fixed time difference T0. The absolute time difference T is the time T0 after the fixed pulse difference at both ends is removed. For example, at 1500 rpm, after the catheter 400 to be tested is stable, the data collected by the encoder disk of the external drive module 500 and the measuring device at the same time have a fixed time difference T0. When the test is started, the difference between the two pulses is actually T0+T. That is, the absolute time difference actually ignores T0.

[0095] More specifically, absolute time difference=acceleration time difference-stabilization time difference, that is, T=acceleration time difference-T0.

[0096] In step S1103, the length of the spring wire in the catheter 400 to be tested is determined according to the absolute time difference. The absolute time difference T during acceleration is proportional to the length of the spring wire in the catheter 400 to be tested. Generally, the larger the absolute time difference T, the longer the length of the spring wire in the catheter 400 to be tested.

[0097] Specifically, according to the absolute time difference, the length of the spring wire in the catheter 400 to be tested is queried in a pre-established first mapping table, and the first mapping table includes a mapping relationship between the absolute time difference and the length of the spring wire.

[0098] However, the properties of spring wires corresponding to different materials, different processes, and different batches may be different. Therefore, for different batches, even if they are made of the same material and the same process, steps S1101 to S1104 need to be re-executed. That is, as long as one of the materials, processes, and batches is different, its length needs to be re-measured, and the first preset time length is calculated according to the length.

[0099] In addition, the mapping relationship between the absolute time difference and the spring wire length in the first mapping table may be different for different materials. Therefore, different first mapping tables can be set for different materials.

[0100] In step S1104, the first preset time length is determined according to the length of the spring wire in the catheter to be tested 400. Specifically, according to the length of the spring wire in the catheter to be tested 400, the first preset time length is queried in a pre-established second mapping table, and the second mapping table includes a mapping relationship between the length of the spring wire and the first preset time length. Generally, the longer the length of the spring wire is, the longer the period of stabilization is, that is, the longer the first preset time length is.

[0101] It is worth noting that for spring wires of different materials, the corresponding elastic modulus is different. For example, the elastic modulus of carbon steel is about 200-210GPa, and the elastic modulus of stainless steel is about 193GPa. The elastic modulus determines the degree of deformation of the spring when it is subjected to force. Therefore, for different materials, the proportional relationship between the length of the spring wire and the first preset time length will be different. Therefore, for different materials, the corresponding second mapping table is also different.

[0102] For example, the spring wire starts rotating at 1500 rpm and accelerates from 1500 rpm to 12000 rpm within 1 second. The number of pulses of the encoder disk of the external drive module 500 at 12000 rpm is 200, and the number of pulses of the pipe section 410 to be measured measured by the measuring device is 195. Then the time difference T between the first pulse signal and the second pulse signal is 128μs. By querying the corresponding spring wire length in the first mapping relationship table corresponding to the material of the spring wire, for example, the length of the spring wire corresponding to T=128μs is 1.4 meters; then, according to the length of the spring wire 1.4 meters, the corresponding first preset time length is queried in the second mapping relationship corresponding to the material.

[0103] In step S1003b, when the catheter 400 to be tested is in a stable state, when the time difference first increases and then remains constant, it is determined that the catheter 400 to be tested is affected by external pressure. In a natural state, the pulse time difference at both ends of the catheter 400 to be tested tends to be stable. That is, in a stable state, the pulse time difference at both ends of the catheter 400 to be tested is fixed.

[0104] Since in a stable state, the catheter to be tested 400 will not always be in a fluctuating state when subjected to external force, it will first increase and then remain constant. More specifically, when the catheter to be tested 400 is in a stable state, when the time difference first increases and then remains constant within the second preset time length, it is determined that the catheter to be tested 400 is affected by external pressure. The second preset time length is related to the length of the spring wire. The longer the length of the spring wire, the longer the second preset time length. In addition, as mentioned above, different materials have different elastic moduli. For different materials, the second preset time length corresponding to the same spring wire length will also be different. Therefore, the second preset time length can be determined according to the length of the spring wire and the material of the spring wire.

[0105] In step S1003c, when it is determined that the catheter 400 to be tested is affected by the external pressure and the time difference first decreases and then remains constant, it is determined that the catheter 400 to be tested is no longer affected by the external pressure. When it is determined that the catheter 400 to be tested is affected by the external pressure and the time difference first decreases and then remains constant within a third preset time length, it is determined that the catheter 400 to be tested is no longer affected by the external pressure; wherein the second preset time length and the third preset time length are determined according to the length of the catheter 400 to be tested.

[0106] The third preset time length is related to the length of the spring wire. The longer the length of the spring wire, the longer the third preset time length. In addition, as mentioned above, different materials have different elastic moduli. For different materials, the third preset time length corresponding to the same spring wire length will also be different. Therefore, the third preset time length can be determined according to the length of the spring wire and the material of the spring wire.

[0107] In step S1003d, when the catheter 400 to be tested is in a stable state, when the time difference changes irregularly, it is determined that the spring wire in the catheter 400 to be tested is ineffective. When the catheter 400 to be tested is in a natural state, once it is in a stable state, the pulse difference at both ends of the catheter 400 to be tested is a constant value. When the time difference between the rising edges of the first pulse signal and the second pulse signal changes irregularly at a constant speed, it can be determined that the spring wire is in an ineffective state. In this way, if the ineffective state of the catheter 400 to be tested is not detected, image jitter will occur in actual use, which will cause great obstacles for doctors to read the image. Therefore, the timely detection of the ineffective state of the spring wire in the present invention can further avoid the above problems.

[0108] In a feasible implementation, when the catheter 400 to be tested is in a stable state, the time difference between the multiple adjacent pulse rising edges of the first pulse signal and the second pulse signal is obtained; based on the time difference between the multiple adjacent pulse rising edges, the change rate of the multiple time differences is calculated; when the change rate is greater than a first preset threshold, it is determined that the spring wire in the catheter 400 to be tested has failed. The first preset threshold can be set according to the user's usage accuracy, and the first preset threshold is usually 1-1.5. Assuming that the change rate changes from 1 to 8, it is considered abnormal.

[0109] In another feasible implementation, when the catheter 400 to be tested is in a stable state, the time difference between the rising edges of multiple adjacent pulses of the first pulse signal and the second pulse signal is obtained; the fluctuation value is calculated according to the time difference between the rising edges of multiple adjacent pulses; when the fluctuation value is greater than a second preset threshold, it is determined that the spring wire in the catheter 400 to be tested has failed. The calculation formula of the fluctuation value is:

[0110] ;

[0111] Among them, K n is the fluctuation value;

[0112] n is the number of time differences between the rising edges of multiple pulses obtained;

[0113] x i is the time difference of the selected i rising edges;

[0114] It is the average value of the time difference between multiple pulse rising edges.

[0115] The second preset threshold can be set according to the user's usage accuracy, and usually the second preset threshold is 1-1.5.

[0116] For example, the time differences between the rising edges of 10 adjacent pulses of the first pulse signal and the second pulse signal are 1, -2, -3, 8, 5, 2, -4, 2, 3, and 0, respectively. Then the calculated K n The value of 12.096 is obviously greater than 1.5, which is considered to be an abnormal state, that is, the catheter 400 to be tested is in a failed state.

[0117] Figures 5 to 12 A schematic diagram of a rotation speed measuring device for an optical coherence tomography imaging catheter provided by the present invention (hereinafter referred to as the rotation speed measuring device, and the optical coherence tomography imaging catheter is referred to as the catheter to be measured 400) is shown.

[0118] It can be understood that in actual application, the optical coherence tomography imaging catheter is connected to the driving module so that it can rotate around its own axis under the drive of the driving module. When performing the rotation speed detection operation, similarly, the proximal section of the catheter 400 to be tested is connected to the driving module, and by collecting the output data of the driving module (such as the output data of the encoder), the first rotation angle of the proximal section of the catheter 400 to be tested can be accurately obtained. The rotation speed measurement device provided by the present invention is mainly used to measure the rotation angle of any pipe section of the distal section of the catheter 400 to be tested (that is, the pipe section 410 to be tested) to obtain a second rotation angle. By comparing the second rotation angle with the first rotation angle, it can be known whether there is a deviation in the rotation speed at the pipe section 410 to be tested, and whether the deviation exceeds the preset deviation threshold.

[0119] For ease of understanding, in the following embodiments, the rotation speed measuring device is defined as having a horizontal direction, a vertical direction and a vertical direction arranged in pairs, wherein the horizontal direction generally corresponds to the extension direction of the conduit 400 to be measured.

[0120] In view of the above, the rotation speed measuring device of the optical coherence tomography imaging catheter specifically includes a base 100 and a photosensitive sensor. The base 100 is formed with a detection cavity 101 and a channel 112 connected to the detection cavity 101. The base 100 is provided with a light shielding arrangement at least at the side walls of the detection cavity 101. The channel 112 extends transversely to penetrate at least one end of the outer wall of the base 100, so that the catheter 400 to be tested can be moved through to drive its tube section 410 to be tested to be exposed in the detection cavity 101. The photosensitive sensor is arranged in the detection cavity 101 and is spaced beside the channel 112. The sensing surface of the photosensitive sensor faces the channel 112, and triggers a sensing signal when receiving light emitted from the tube section 410 to be tested during the rotation of the catheter 400 to be tested.

[0121] In the technical solution provided by the present invention, when it is necessary to measure the rotation speed of the pipe section 410 of the pipe 400 to be tested, the pipe 400 to be tested is firstly inserted into the channel 112 so that the pipe section 410 to be tested is exposed in the detection cavity 101 and is within the sensing range of the photosensor. Then, the external driving module 500 connected to the pipe 400 to be tested is operated to start running, driving the pipe section 410 to be tested to rotate around its own axis. During the rotation process, the light directly emitted by the light source device fixed at the preset side wall of the pipe section 410 to be tested, or the light reflected by the preset side wall of the pipe section 410 from the external light source device, will be periodically received by the sensing surface of the photosensor, so that the photosensor can regularly trigger at least one sensing signal (for example, a relatively strong signal formed when the light is irradiated approximately vertically with the sensing surface, as the sensing signal) every time the pipe section 410 to be tested rotates one circle. The sensing signal can be subsequently used to compare and analyze the output signal of the external driving module 500, and finally obtain the deviation data between the output rotation speed of the external driving module 500 and the actual rotation speed at the pipe section 410 to be tested. Since the photosensitive sensor is spaced apart from the conduit 400 to be tested as a whole, non-contact detection can be achieved. Compared with contact detection, the present invention helps to eliminate the adverse load generated by the detection device during the rotation of the pipe section 410 to be tested; and combined with the shading setting at the detection cavity 101, light can be sensed by the photosensitive sensor more accurately and efficiently. The present invention helps to simplify the detection structure and detection operation, and improve the detection accuracy.

[0122] In the present invention, the specific form of the base 100 is not limited, and can be but not limited to: Figures 5 to 12 The block structure shown. The base 100 can be formed into the detection cavity 101 and / or the channel 112 in any manner, for example, it can be formed by an integral injection molding process. Alternatively, the base 100 can be configured to include at least two detachably connected monomers, and when the monomers are connected, the detection cavity 101 and / or the channel 112 can be jointly defined; when at least one monomer is detached, the detection cavity 101 and / or the channel 112 is opened, which is convenient for disassembly, assembly and replacement of, for example, a photosensitive sensor.

[0123] like Figures 5 to 12In the illustrated embodiment, the base 100 includes a base 110, a mounting bracket 120, and a cover plate 130. A detection slot 111 is provided on one vertical side or one longitudinal side of the base 110, and a channel 112 is provided on the base 110 in a horizontal direction; the mounting bracket 120 is disposed in the detection slot 111 and is located beside the channel 112, and a first mounting hole 121 is formed through the mounting bracket 120 toward the channel 112, and the first mounting hole 121 is provided for the fixed installation of the photosensitive sensor; the cover plate 130 can be installed at the notch of the detection slot 111 in an openable and closable manner, and when the notch of the detection slot 111 is movably covered, the cover plate 130 and the base 110 together enclose and define the detection slot 111.

[0124] The base 110 is used to place the rotation speed measuring device at a position adjacent to the driving module. In view of the above, it can be known that the horizontal direction generally corresponds to the extension direction of the conduit 400 to be tested during the detection process. In a specific application, when the base 110 is placed on a horizontal surface such as a platform or a desktop, the conduit 400 to be tested extends and rotates in the horizontal direction. At this time, the base 110 can be provided with a structure that is convenient for placement on a horizontal surface according to actual needs, such as a quick-connect structure, an anti-slip structure, a walking structure, etc. Specifically in another application, the base 110 can be suspended and set on a vertical surface. At this time, the conduit 400 to be tested extends and rotates roughly along the direction of gravity. Compared with the solution extending in the horizontal direction, it helps to reduce the local lateral bending deformation of the pipe section 410 to be tested due to the influence of gravity, which adversely affects the normal rotation. At this time, similarly, the base 110 can be provided with a structure that is convenient for placement on the vertical surface according to actual needs, such as a hanging structure, an anti-sway structure, etc. Of course, in another application, the operator may directly hold the base 110 to perform the rotational speed detection operation. In this case, the base 110 may be provided with a structure that is convenient for holding according to actual needs. For example, the overall shape of the base 110 may be provided in the shape of a handle or a gun body that is convenient for holding, without limitation.

[0125] The mounting bracket 120 is mainly used to positionally mount the light sensor in the detection slot 111; and the cover plate 130 is mainly used to cover the notch of the detection slot 111 and enclose and define the detection cavity 101. Based on this, for example Figures 5 to 7 In the structure shown, the mounting bracket 120 and the cover plate 130 can be integrally formed and set as one component. When the light sensor is installed at the first mounting hole 121, the sensing surface of the light sensor faces the detection slot 111, and the remaining part of the light sensor is sufficient to cover the first mounting hole 121, ensuring that the light sensor and the mounting bracket 120 as a whole can achieve the purpose of covering the cover plate 130. Or as Figures 8 to 12 In the structure shown, the mounting bracket 120 and the cover plate 130 can be separately provided as two components, and the two components can remain independent and not interfere with each other, or can be connected in a detachable or non-detachable manner.

[0126] Among them, the mounting bracket 120 and / or the cover plate 130 are generally arranged to be detachably connected relative to the base 110, but the specific disassembly and assembly method is not limited. For example, the mounting bracket 120 can be fixed in the detection slot 111 by, for example, size design clamping; or it can be screwed and fixed in the detection slot 111 by screws or other screw-in parts. The same applies to the cover plate 130. In a specific embodiment, the base 110 is provided with second slide grooves 116 on both sides of the slot width of the detection slot 111; the cover plate 130 can be slidably installed in the second slide groove 116 in the horizontal direction, which is convenient for the opening and closing movement of the cover plate 130 relative to the notch of the detection slot 111, and ensures that the cover plate 130 is not easy to completely detach from the base 110, so as to avoid the situation where parts are damaged or lost.

[0127] In addition, after the detection cavity 101 is defined and formed as described above, a light shielding arrangement is made at least at each side cavity wall of the detection cavity 101 to form a dark environment in the detection cavity 101 to prevent the external light source from affecting the sensing of the photosensitive sensor. The light shielding arrangement may specifically but not limited to: the base 110 and the cover plate 130 are made of light shielding material as a whole or in part. When the base 110 and the cover plate 130 are made of a light-transmitting material, a light-shielding material layer may be provided on the inner cavity surface of the detection cavity 101 and / or the outer surface of the base 110 / cover plate 130, and the light-shielding material layer may be a light-shielding coating applied to the above-mentioned surfaces, a light-shielding film layer attached to the above-mentioned surfaces, etc. Among them, when the light-shielding material layer is not limited to being connected and fixed or integrally formed with the above-mentioned surfaces, further, the light-shielding material layer may be provided to be movable relative to the base 110 and / or the cover plate 130, with a light-shielding state when covering the above-mentioned surfaces, and a light-transmitting state when detached from at least one of the above-mentioned surfaces. When in the light-transmitting state, the light-transmitting portion can facilitate the operator to visually check, for example, whether the photosensor is installed in place, whether the insertion of the tested catheter 400 in the channel 112 is deformed, whether the position of the tested pipe section 410 in the detection cavity 101 meets the requirements, etc.

[0128] In view of the above, it can be known that the photosensitive sensor is used to receive the light emitted when a side wall of the pipe section 410 to be tested rotates and passes by:

[0129] Specifically, in one embodiment, when the pipe section 410 to be tested is specifically the distal section of the imaging catheter, since a light source device (such as the light emitting portion of an optical fiber) is fixedly provided at the distal section of the imaging catheter, and the light source device emits light laterally from one radial side of the imaging catheter, light can be directly emitted periodically toward the photosensitive sensor during the rotation process to complete the sensing process. Therefore, in this scenario, it is sufficient to start the photosensitive sensor.

[0130] Or in another embodiment, when the pipe section 410 to be tested is specifically the middle section of the imaging catheter, that is, the pipe section 410 to be tested cannot directly emit light, further, the rotation speed measuring device for the optical coherence tomography imaging catheter also includes a laser emitter and a reflective film layer. At this time, the laser emitter is fixedly installed in the detection cavity 101, and the emission surface of the laser emitter can emit laser toward the channel 112; the reflective film layer is used to be fixedly set on the radial side of the pipe section 410 to be tested, so that when the pipe section 410 to be tested is driven to rotate to receive the laser emitted by the laser emitter, the laser is reflected to the sensing surface of the photosensitive sensor. By setting the reflective film layer, the specific position of the pipe section 410 to be tested can be indicated. When the catheter 400 to be tested drives the reflective film layer to be placed in place and rotated, the reflective film layer can periodically reflect the laser emitted by the laser emitter, and the reflected light can be received by the photosensitive sensor. Therefore, in this scenario, it is necessary to control both the laser emitter and the photosensitive sensor to start running.

[0131] When the mounting bracket 120 is provided as described above, the mounting bracket 120 is further provided with a second mounting hole 122 extending toward the channel 112, and the first mounting hole 121 and the second mounting hole 122 are respectively provided on both sides of the longitudinal direction of the channel 112. Fig.12 The mounting bracket 120 can be specifically configured as a curved structure that is longitudinally arranged on both sides of the channel 112, having a middle bracket section corresponding to the channel 112, and two outer bracket sections that are arranged on both sides of the middle bracket section in the longitudinal direction. The first mounting hole 121 and the second mounting hole 122 are respectively arranged at the two outer bracket sections, and in order to enable the laser emitted by the laser reflector to be better received by the photosensitive sensor after being reflected by the reflective film layer, the two outer bracket sections can be arranged at an angle, and the specific angle value is not limited, for example, it can be specifically 90°.

[0132] Furthermore, the mounting bracket 120 is also provided with a first window 123 between the first mounting hole 121 and the second mounting hole 122, and a first positioning mark 124 is provided beside the first window 123, and the first positioning mark 124 is used to position the reflective film layer that is movably inserted into the first window 123. That is, the first window 123 is provided at the above-mentioned middle bracket section, and the first window 123 is also a window structure for visual inspection by the operator, which can be a directly hollowed hole-like structure, or a structure in which a transparent cover is covered at the hole-like structure, or the middle bracket section of the mounting bracket 120 is set to be made of a transparent material to directly constitute the first window 123. The first window 123 allows the operator to visually check whether the reflective film layer of the pipe section 410 to be tested is in place in the detection cavity 101. The first positioning mark 124 is mainly used to indicate the accurate placement position of the reflective film layer, which can be but not limited to a pattern mark, a text mark, a color mark, etc.

[0133] Further, in order to make the above-mentioned on / off control of the photosensitive sensor and the laser transmitter more convenient and intelligent, and in order to better receive and receive the sensing signal of the photosensitive sensor, in one embodiment, the base 110 is also provided with a mounting groove 117 on one lateral side of the detection groove 111, and the mounting groove 117 is provided with a through hole 118 connected to the detection groove 111; the rotation speed measuring device for the optical coherence tomography imaging catheter also includes a circuit board and a connecting cable, the circuit board is fixedly installed in the mounting groove 117, and at least part of the connecting cable is passed through the through hole 118, and the circuit board and the photosensitive sensor are connected. Among them, the circuit board can compile relevant programs according to actual needs, such as the above-mentioned switching programs related to the photosensitive sensor and the laser transmitter, and the sending and receiving programs of the sensing signal of the photosensitive sensor. The connecting cable is routed at the through hole 118 to better connect the circuit board and the photosensitive sensor and the laser reflector. The remaining connecting cables can be routed on the other side, for example, by penetrating the outer wall of the base 110 through the groove wall on one side of the mounting groove 117 to form a routing hole, and the connecting cable is led outward through the routing hole.

[0134] In addition, based on one or more of the above embodiments, it can be understood that the catheter 400 to be tested can be directly inserted into the channel 112. Or in another design, the rotation speed measurement device for the optical coherence tomography imaging catheter also includes a cannula 200 arranged in a transparent state, the inner diameter of the cannula 200 is equivalent to the outer diameter of the catheter 400 to be tested, and the cannula 200 is used for the catheter 400 to be tested to be movable. The setting of the cannula 200 helps to reduce the molding quality requirements for the channel 112 on the base 100; at the same time, the setting of the cannula 200 facilitates the insertion of the catheter 400 to be tested. If there is no cannula 200, the catheter 400 to be tested will produce certain deformation when it reaches, for example, the detection cavity 101, and it is easy to bend in the detection cavity 101, affecting the detection data. For example, the cannula 200 can be directly composed of a glass tube, which has sufficient structural strength and can meet the transparency requirements. The surfaces of the inner tube wall and the outer tube wall of the glass tube are relatively smoother, which is more convenient for inserting the cannula 200 into the channel 112 and for inserting the catheter 400 to be tested into the cannula 200. It also helps to ensure that during the insertion of the catheter 400 to be tested, the probability of local bending or deformation of the catheter 400 to be tested due to excessive interference between the catheter 400 to be tested and the inner tube wall is reduced.

[0135] Next, the cannula 200 may be fixedly inserted in the channel 112 , so that each time a detection operation is performed, only the step of inserting the catheter 400 to be tested into the cannula 200 is required.

[0136] Or the cannula 200 is movably and adjustable in the transverse direction and inserted into the channel 112. In this way, according to actual needs, the step of inserting the catheter 400 to be tested into the cannula 200 can be first operated outside the channel 112, and the transparent visualization of the cannula 200 can help to better achieve the insertion of the catheter 400 to be tested, so that the catheter 400 to be tested is completely or preliminarily inserted into the cannula 200, and then the cannula 200 and the catheter 400 to be tested are operated to be inserted into the channel 112 together. Of course, when it is necessary to measure the rotation speed of different sections 410 to be tested of the same catheter 400 to be tested, the section 410 to be tested that needs to be measured can also be moved into place by operating the cannula 200 to be adjusted in the transverse direction at the channel 112. Based on this, a locking structure can also be provided between the cannula 200 and the base 110, and the locking structure has a locked state and an unlocked state. When the cannula 200 and / or the catheter 400 to be tested needs to be adjusted, the locking structure is in the unlocked state; when the adjusted tube section 410 to be tested needs to be measured, the locking structure is in the locked state. The locking structure can be, but is not limited to, switching between the locked state and the unlocked state by means of the magnetic attraction of the magnetic attraction structure; it can also be switching between the locked state and the unlocked state by means of the meshing of the gear and the rack, etc.

[0137] In addition, in order to measure the rotation speed of different pipe sections 410 to be tested of the same pipe 400 to be tested, when the detection cavity 101 is long enough in the lateral direction, at least one of the photosensitive sensor, the laser emitter and the mounting bracket 120 can be arranged to be movable and adjustable in the lateral direction. By adjusting the lateral position of the photosensitive sensor, the laser emitter and / or the mounting bracket 120, the movement of the pipe 400 to be tested can be avoided, and the purpose of measuring the rotation speed of different pipe sections 410 to be tested of the same pipe 400 to be tested can be achieved. Among them, the driving force for the lateral movable adjustment can come from the manual operation of the operator, or from the automatic operation of a specially set power mechanism.

[0138] On the basis of the above, when the position of the catheter 400 to be tested relative to at least one of the photosensitive sensor, the laser emitter and the mounting bracket 120 changes along the lateral direction, a positioning structure or a mechanism for calibrating the position can be further provided inside or outside the detection cavity 101 to ensure that each relative movement can be accurately positioned. Among them, the mechanism for calibrating the position can be, but not limited to, for example, a displacement sensor; the positioning structure can be, but not limited to, a positioning mark, etc. Specifically, in one embodiment, the base 110 is further provided with a second window 114 on one lateral side of the detection slot 111, and a second positioning mark 115 is provided beside the second window 114, and the second positioning mark 115 is used to position the pipe section 410 to be tested that is movably arranged in the channel 112. Similar to the first window 123 described above, the second window 114 is also a window structure for visual inspection by the operator, which can be a directly hollowed hole-shaped structure, or a structure in which a transparent cover is covered at the hole-shaped structure, or the corresponding part of the base 110 is set to be made of a transparent material to directly constitute the second window 114. The second window 114 allows the operator to visually check whether the position of the pipe section 410 to be tested is moved into place in the detection chamber 101. The second positioning mark 115 is mainly used to indicate the accurate placement position of the pipe section 410 to be tested, which can be but not limited to a pattern mark, a text mark, a color mark, etc., such as a scale mark.

[0139] In addition, when the second slide groove 116 is provided as described above, the second slide groove 116 can extend horizontally to the second window 114. In this way, on the one hand, it is helpful to reasonably utilize the second window 114 to expand the range of the activity space of the cover plate 130; on the other hand, it is helpful to appropriately increase the plate surface of the cover plate 130 to be larger than the notch of the detection slot 111, so that the second window 114 close to the detection chamber 101 can be shielded during the detection process, thereby further ensuring the quality of the dark environment in the detection chamber 101.

[0140] In view of the above, the channel 112 can be a single end that passes through the base 100 to form an opening for insertion; or the channel 112 can also pass through the opposite ends of the base 100 to form two openings for insertion or exit. In this case, the length of the cannula 200 can be set to be just the same as the length of the channel 112, appropriately less than the length of the channel 112, or appropriately greater than the length of the channel 112 so that part of the tube section extends out of the opening. For example, when it is necessary to measure the tube section 410 to be measured in the middle section, the appropriate extension of the cannula 200 can be accommodated by the distal section of the catheter 400 to be measured, and the optical lens and the like arranged at the distal section of the catheter 400 to be measured can be accommodated and protected, and the catheter 400 to be measured can be supported to extend naturally in the lateral direction as a whole without substantially generating lateral bending deformation. In this case, at least a partial section of the cannula 200 can be set to have a telescopic adjustment performance in the lateral direction, and can be extended to extend out of the opening when needed, and retracted when not needed to avoid forming interference protrusions on the outer wall of the base 100. Its telescopic adjustment capability can be achieved through elastic deformation of elastic materials or through structural telescopic activities such as bellows.

[0141] Based on one or more of the above embodiments, when it is necessary to directly insert the catheter 400 to be tested into the channel 112; or when the cannula 200 is fixed in the channel 112, it is necessary to insert the catheter 400 to be tested into the cannula 200 in the channel 112, further, the rotation speed measurement device for the optical coherence tomography imaging catheter also includes a traction structure 300, the traction structure 300 is exposed and arranged outside the base 100, and is used to connect with the matching structure arranged at the catheter 400 to be tested, and the traction structure 300 is movable in the lateral direction under the driving of an external force to drive the catheter 400 to be tested to be movable and inserted in the channel 112. When the traction structure 300 is connected with the matching structure, a linkage connection between the traction structure 300 and the catheter 400 to be tested can be realized. In this way, when the external force drives the traction structure 300 to move in the lateral direction, the catheter 400 to be tested can be driven to move in the lateral direction synchronously, thereby ensuring that the catheter 400 to be tested is inserted in place in the channel 112 or in the cannula 200 in the channel 112. Since the traction structure 300 is directly exposed outside the base 100, the external force can be directly applied manually by an operator or automatically by a specially provided power component.

[0142] Specifically, in one embodiment, a first slide groove 113 is provided on the outer wall of one vertical side and / or the outer wall of one longitudinal side of the base 100, and the first slide groove 113 extends in the horizontal direction; the iron-containing part of the catheter 400 to be tested constitutes a matching structure, and the traction structure 300 is slidably installed in the first slide groove 113, and at least part of the traction structure 300 is made of magnetic material. The magnetic material is, for example, a magnet, and the matching structure can be a magnet or a structure containing iron, cobalt, and nickel, so as to ensure that the traction structure 300 and the matching structure can be magnetically adsorbed and released and separated. The matching structure can be a structure specially and additionally arranged at the catheter 400 to be tested; or a component inherent in the catheter 400 to be tested that meets the above requirements directly constitutes the matching structure. For example, when the catheter 400 to be tested contains a metal spring wire, the metal spring wire directly constitutes the above matching structure, which can be magnetically adsorbed with the magnetic structure.

[0143] In order to achieve the above object, the present invention also provides a computer device, such as Fig.13 As shown, the computer device includes at least one processor 301; and a memory 302 that is communicatively connected to the at least one processor 301; wherein the memory 302 stores instructions that can be executed by the at least one processor 301, and the instructions are executed by the at least one processor 301 so that the at least one processor 301 can execute the above-mentioned fault diagnosis method for the optical coherence tomography imaging catheter.

[0144] The memory 302 and the processor 301 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 301 and the memory 302 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 301 is transmitted on a wireless medium through an antenna, and further, the antenna also receives data and transmits the data to the processor 301.

[0145] The processor 301 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 302 can be used to store data used by the processor 301 when performing operations.

[0146] In order to achieve the above object, the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program implements the above fault diagnosis method for an optical coherence tomography imaging catheter when executed by a processor.

[0147] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned implementation method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each implementation of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0148] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A fault diagnosis system for an optical coherence tomography imaging catheter, used for diagnosing a catheter to be tested, wherein the catheter to be tested comprises a pipe section to be tested and a connecting section at an end opposite to the pipe section to be tested, characterized in that: include: A measuring device, used for installing the pipe section to be measured of the pipe to be measured, measuring the actual rotation speed of the pipe section to be measured, and outputting a first pulse signal representing the actual rotation speed of the pipe section to be measured; An external driving module is drivingly connected to the connecting section of the catheter to be tested; A controller is electrically connected to the external driving module and the measuring device, respectively, and the controller is configured as follows: Real-time acquisition of a first pulse signal of the measuring device used to characterize the actual rotation speed of the pipe section to be measured and a second pulse signal of the output rotation speed of the external driving module; Calculating the time difference between the rising edges of the first pulse signal and the second pulse signal; According to the change of the time difference, abnormal information of the catheter to be tested is diagnosed, including: When the time difference increases first and then decreases and remains in a stable state within a first preset time period, it is determined that the pipe section to be tested and the connecting section of the pipe to be tested are not synchronized; and / or, When the catheter to be tested is in a stable state, when the time difference first increases and then remains constant, it is determined that the catheter to be tested is affected by external pressure; and / or, When it is determined that the catheter to be tested is affected by the external pressure and the time difference first decreases and then remains constant, it is determined that the external pressure on the catheter to be tested is cancelled; and / or, When the catheter to be tested is in a stable state, when the time difference changes irregularly, determining that the spring wire in the catheter to be tested is failed; The determination of the first preset duration includes: Acquire an acceleration time difference between a first pulse signal and a second pulse signal corresponding to when the catheter to be tested accelerates from a first rotation speed to a second rotation speed within a second preset time length; Calculating an absolute time difference during the acceleration process of the catheter to be tested according to the acceleration time difference and the stabilization time difference when the catheter to be tested is in a stable state; Determining the length of the spring wire in the catheter to be tested according to the absolute time difference; The first preset time length is determined according to the length of the spring wire in the catheter to be tested.

2. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 1, characterized in that: In the calculation of the absolute time difference during the acceleration process of the catheter to be tested according to the acceleration time difference and the stabilization time difference when the catheter to be tested is in a stable state, the absolute time difference=acceleration time difference-stabilization time difference.

3. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 1, characterized in that: The controller is also configured to: According to the absolute time difference, query the length of the spring wire in the catheter to be tested in a pre-established first mapping table, wherein the first mapping table includes a mapping relationship between the absolute time difference and the length of the spring wire; and / or, According to the length of the spring wire in the catheter to be tested, the first preset time length is queried in a pre-established second mapping table, and the second mapping table includes a mapping relationship between the length of the spring wire and the first preset time length.

4. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 1, characterized in that: The controller is also configured to: When the catheter to be tested is in a stable state, when the time difference first increases and then remains constant within a second preset time period, it is determined that the catheter to be tested is affected by external pressure; When it is determined that the catheter to be tested is affected by the external pressure, and the time difference first decreases and then remains constant within a third preset time period, it is determined that the external pressure on the catheter to be tested is cancelled; The second preset time length and the third preset time length are determined according to the length of the catheter to be tested.

5. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 1, characterized in that: The controller is also configured to: When the catheter to be tested is in a stable state, obtaining time differences between a plurality of adjacent pulse rising edges of the first pulse signal and the second pulse signal; Calculating the change rates of the multiple time differences according to the time differences of the multiple adjacent pulse rising edges; When the change rate is greater than a first preset threshold, it is determined that the spring wire in the catheter to be tested has failed.

6. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 1, characterized in that: The controller is also configured to: When the catheter to be tested is in a stable state, obtaining time differences between a plurality of adjacent pulse rising edges of the first pulse signal and the second pulse signal; The fluctuation value is calculated according to the time difference between the rising edges of multiple adjacent pulses. The calculation formula of the fluctuation value is: ； Among them, K n is the fluctuation value; n is the number of time differences between the rising edges of multiple pulses obtained; T i is the time difference of the selected i rising edges; is the average value of the time difference of multiple pulse rising edges obtained; When the fluctuation value is greater than a second preset threshold, it is determined that the spring wire in the catheter to be tested has failed.

7. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 1, characterized in that: The measuring device comprises: A base is formed with a detection cavity and a channel connected to the detection cavity, the base is provided with a light shielding device at least at each side wall of the detection cavity, and the channel extends transversely to penetrate at least one end outer wall of the base, so that the catheter to be tested can be movably inserted therethrough to drive the tube section to be tested to be exposed in the detection cavity; and A photosensor is disposed in the detection cavity and is spaced apart beside the channel. The sensing surface of the photosensor faces the channel and triggers a sensing signal when receiving light emitted from the pipe section to be tested during the rotation of the pipe to be tested. The photosensor is electrically connected to the controller.

8. The fault diagnosis system for an optical coherence tomography imaging catheter according to claim 7, characterized in that: The measuring device further comprises a cannula which is transparent, the inner diameter of which is equivalent to the outer diameter of the catheter to be measured, and the cannula is used for the catheter to be measured to be movably inserted therein; The insert tube is fixedly inserted into the passage, or the insert tube is movably and adjustably inserted into the passage in the transverse direction.

9. A method for diagnosing a fault of an optical coherence tomography imaging catheter, for diagnosing a catheter to be tested, wherein the catheter to be tested comprises a tube section to be tested and a connecting section at an end opposite to the tube section to be tested, characterized in that: include: Real-time acquisition of a first pulse signal of a measuring device used to characterize the actual rotation speed of the pipe section to be measured and a second pulse signal of the rotation speed output by an external drive module, wherein the measuring device is used to install the pipe section to be measured of the pipe to be measured and measure the actual rotation speed of the pipe section to be measured, and the external drive module is drivingly connected to the connecting section of the pipe to be measured; Calculating the time difference between the rising edges of the first pulse signal and the second pulse signal; According to the change of the time difference, abnormal information of the catheter to be tested is diagnosed, including: When the time difference increases first and then decreases and remains in a stable state within a first preset time period, it is determined that the pipe section to be tested and the connecting section of the pipe to be tested are not synchronized; and / or, When the catheter to be tested is in a stable state, when the time difference first increases and then remains constant, it is determined that the catheter to be tested is affected by external pressure; and / or, When it is determined that the catheter to be tested is affected by the external pressure and the time difference first decreases and then remains constant, it is determined that the external pressure on the catheter to be tested is cancelled; and / or, When the catheter to be tested is in a stable state, when the time difference changes irregularly, determining that the spring wire in the catheter to be tested is failed; The determination of the first preset duration includes: Acquire an acceleration time difference between a first pulse signal and a second pulse signal corresponding to when the catheter to be tested accelerates from a first rotation speed to a second rotation speed within a second preset time length; Calculating an absolute time difference during the acceleration process of the catheter to be tested according to the acceleration time difference and the stabilization time difference when the catheter to be tested is in a stable state; Determining the length of the spring wire in the catheter to be tested according to the absolute time difference; The first preset time length is determined according to the length of the spring wire in the catheter to be tested.

10. A computer device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the fault diagnosis method for an optical coherence tomography imaging catheter as claimed in claim 9.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the fault diagnosis method for an optical coherence tomography imaging catheter according to claim 9 is implemented.

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