Detection system and detection method thereof

Abstract

The invention discloses a detection system and a detection method thereof, the detection system comprises an optical fiber, a light source, a detection device, an optical fiber fixing device and a displacement device, and the optical fiber comprises a fixing part and a detection part; the fiber fixing device is connected with the fixing part; the light source is connected with the end of the fixing part; the detection device is provided with a detection surface, the detection surface is provided with a detection hole, the detection surface faces the detection part, the detection surface and the detection part are arranged at an interval, the detection surface is parallel to the optical fiber axis of the detection part, and the detection device is used for detecting radiation information of the detection part through the detection hole; the detection device is arranged on the displacement device, and the displacement device is used for controlling the displacement of the detection device, so that the detection surface moves around the detection part and the vertical distance between the detection hole and the end part of the detection part is adjusted. According to the invention, the detection system can stabilize the relative position of the optical fiber axis and the displacement device in the detection process, can accurately carry out annular energy detection on the periphery of the optical fiber, and can realize high-precision and high-efficiency detection work of the non-traditional processing optical fiber.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber radiation detection, and in particular to a detection system and a detection method thereof. Background Art

[0002] Optical fiber is a fiber made of glass or plastic that uses the principle of total reflection to transmit optical signals. Currently, optical fiber can also be used in biomedicine, scientific research and teaching, optoelectronic information and other fields. Especially in the medical field, it is very important to detect the radiation energy of optical fiber and determine whether it meets the application scenario.

[0003] Fiber optics are used for treatment in minimally invasive surgery. The laser probe fiber is positioned within the treatment target, and the surgical laser system ablates thermal tissue over time. The accompanying MRI thermal imager can monitor temperature changes and tissue damage in real time.

[0004] Specially processed optical fibers are often used in minimally invasive surgeries. The optical fibers radiate energy from the optical fiber axis to the surrounding areas, but no light is emitted from the end faces. However, current optical fiber detection methods cannot evenly and effectively detect the size and uniformity of the radiated energy of such specially processed optical fibers, which reduces the accuracy of the surgery. Summary of the invention

[0005] The present invention provides a detection system and a detection method thereof, so as to solve the problem that the existing optical fiber detection means cannot detect the radiation energy of the specially processed optical fiber.

[0006] According to one aspect of the present invention, there is provided a detection system, comprising: an optical fiber, a light source, a detection device, an optical fiber fixing device and a displacement device, wherein the optical fiber comprises a fixing portion and a detection portion;

[0007] The optical fiber fixing device is connected to the fixing part and is used to fix the optical fiber;

[0008] The light source is connected to the end of the fixing portion and is used to input an optical signal to the optical fiber;

[0009] The detection device has a detection surface, the detection surface has a detection hole, the detection surface faces the detection part and the two are arranged at a distance, the detection surface is parallel to the optical fiber axis of the detection part, and the detection device is used to detect the radiation information of the detection part through the detection hole;

[0010] The detection device is arranged on the displacement device, and the displacement device is used to control the displacement of the detection device so that the detection surface moves around the detection part and adjusts the vertical distance between the detection hole and the end of the detection part.

[0011] According to another aspect of the present invention, a detection method is provided, which is applied to the detection system as described above, wherein the detection system stores the first to Nth preset heights arranged from small to large, where N is greater than or equal to 1, and the detection method comprises:

[0012] The displacement device adjusts the position of the detection device so that the vertical distance between the detection hole and the end of the detection portion is an i-th preset height, and the vertical distance between the detection surface and the detection portion is a first target spacing, i is greater than or equal to 1 and less than or equal to N;

[0013] The displacement device controls the displacement of the detection device so that the detection device moves around the detection part;

[0014] The detection device detects the detection part to obtain radiation information of the detection part at the i-th preset height and the first target distance.

[0015] In the present invention, the detection system can stabilize the relative position of the optical fiber axis and the displacement device during the detection process, and can also accurately detect the annular energy around the optical fiber, and use the optical fiber radiation energy detection technology to achieve high-precision and high-efficiency detection of special processed optical fibers. The detection system can be used in the fields of biomedicine, scientific research and teaching, and optoelectronic information to detect the radiation energy of optical fibers engraved in special fields and determine whether it meets the application scenario.

[0016] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic diagram of a detection system provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the detection device surrounding the displacement of the optical fiber;

[0020] Figure 3 is a schematic diagram of another detection system provided by an embodiment of the present invention;

[0021] Figure 4 yes Figure 3 A partial side view of the detection system shown;

[0022] Figure 5 is a schematic diagram of another detection system provided by an embodiment of the present invention;

[0023] Figure 6 It is a schematic diagram of a detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] 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. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Figure 1 is a schematic diagram of a detection system provided by an embodiment of the present invention, Figure 2 is a schematic diagram of the detection device surrounding the optical fiber displacement. Figure 1 and Figure 2As shown, the detection system provided by this embodiment includes: an optical fiber 10, a light source 11, a detection device 12, an optical fiber fixing device 13 and a displacement device 14, the optical fiber 10 includes a fixing portion 15 and a detection portion 16; the optical fiber fixing device 13 is connected to the fixing portion 15, and is used to fix the optical fiber 10; the light source 11 is connected to the end of the fixing portion 15, and is used to input an optical signal to the optical fiber 10; the detection device 12 has a detection surface 17, the detection surface 17 has a detection hole 18, the detection surface 17 faces the detection portion 16 and the two are arranged at an interval, the detection surface 17 is parallel to the optical fiber axis of the detection portion 16, the detection device 12 is used to detect and obtain radiation information of the detection portion 16 through the detection hole 18; the detection device 12 is arranged on the displacement device 14, and the displacement device 14 is used to control the displacement of the detection device 12, so that the detection surface 14 moves around the detection portion 16 and adjusts the vertical distance h between the detection hole 18 and the end of the detection portion 16.

[0027] In this embodiment, the detection system is a system for detecting the optical fiber 10, and can detect the radiation energy size and uniformity of the optical fiber 10. The material of the optional optical fiber 10 is TECS hard clad multimode optical fiber with a core diameter of 600μm, but it is not limited to this. The detection system can detect any optical fiber. The optical fiber 10 is a whole, which can be customized to be divided into a fixed part 15 and a detection part 16. Here, the optical fiber area division is not fixed, but a customized functional area division of the optical fiber. Specifically, the clampable part of the optical fiber 10 can be defined as the fixed part 15 of the optical fiber 10, and the part of the optical fiber 10 that can detect the radiation energy is defined as the detection part 16 of the optical fiber 10. Part or all of the area starting from the end of the detection part 16 is not wrapped by the insulating film layer, so the optical fiber exposed area of ​​the detection part 16 can radiate energy to the surroundings, which is convenient for optical fiber radiation energy detection. It can be understood that the optical fiber 10 as a whole has only two ends, wherein the fixed part 15 has one end and the detection part 16 has the other end.

[0028] The detection system includes a light source 11, which can be a laser light source with continuous light output, but is not limited thereto. The light source 11 in the detection system can be any light source suitable for optical fiber radiation energy detection. The light source 11 is connected to the end of the fixed portion 15 of the optical fiber 10, and the light source 11 inputs laser light to the optical fiber 10, so the laser light is transmitted in the optical fiber 10. Specifically, the laser light is transmitted from the fixed portion 15 of the optical fiber 10 to the detection portion 16 of the optical fiber 10, and the detection portion 16 of the optical fiber 10 radiates energy to the surroundings. The wavelength of the optional laser light source is 1064nm, but is not limited thereto.

[0029] The detection system includes an optical fiber fixing device 13, which is connected to a fixing portion 15 of the optical fiber 10. The function of the optical fiber fixing device 13 is to fix the optical fiber 10 to ensure the stability of the optical fiber 10 during the detection process. Figure 1Taking the optical fiber fixing device 13 shown as an example, the optical fiber fixing device 13 includes a stand and a crossbeam. The crossbeam is fixedly connected to the fixing portion 15 of the optical fiber 10 to fix the optical fiber 10, and the stand supports the crossbeam. It can be understood that the connection position of the optical fiber fixing device 13 and the fixing portion 15 of the optical fiber 10 can be adjusted according to actual conditions. For example, the connection position of the optical fiber fixing device 13 and the fixing portion 15 can be close to the end of the fixing portion 15, or the connection position of the optical fiber fixing device 13 and the fixing portion 15 can be far away from the end of the fixing portion 15, or the connection position of the optical fiber fixing device 13 and the fixing portion 15 can be located in the middle of the fixing portion 15. It should be noted that Figure 1 The structural shape of the optical fiber fixing device 13 shown is only an example and is not limited thereto.

[0030] The detection system includes a detection device 12, and the detection device 12 has a detection surface 17, and the detection surface 17 has a detection hole 18. The detection surface 17 faces the detection part 16 and the two are arranged at a distance, and the detection surface 17 is parallel to the optical fiber axis of the detection part 16. During the detection process, the distance r between the detection surface 17 and the detection part 16 is maintained at a fixed value, and the detection surface 17 is actually a side plane of the detection device 12 facing the detection part 16. The detection surface 17 has a detection hole 18, and the detection surface 17 faces the detection part 16. Then, when the detection part 16 radiates energy to the surroundings, part of the radiation energy can pass through the detection hole 18 into the detection device 12 and be detected, so that the detection device 12 can detect the radiation information of the detection part 16 through the detection hole 18. It should be noted that Figure 1 The detection surface 17 having a certain thickness is shown as an example only, and is intended to illustrate the shape of the detection hole 18 .

[0031] The optional detection device 12 includes a thermal power probe located on the side of the detection surface 17 away from the optical fiber 10; the thermal power probe is used to collect the radiation amount of the detection part 16 through the detection hole 18. It should be noted that the structure of the detection device 12 is not limited to the thermal power probe, etc., and also includes other components, such as a processing chip, etc. The processing chip can calculate the radiation-related data of the optical fiber according to the radiation amount of the thermal power probe, which will not be described in detail here.

[0032] The size of the optional detection hole 18 along the first direction is greater than 100μm and less than 500μm, the size of the detection hole 18 along the second direction is greater than 100μm and less than 500μm, the first direction is parallel to the optical fiber axis of the detection part 16, and the second direction is perpendicular to the first direction. Based on this, the detection hole 18 can be designed to be circular, elliptical, square or rectangular, etc., without specific restrictions. If the detection hole 18 is a rectangle, its shape can be a slit, the long side of the slit is along the second direction, the short side of the slit is along the optical fiber axis direction of the detection part 16, and the second direction is within the detection surface 17. It should be noted that the shape, size, etc. of the detection hole are not limited to this. Relevant designers can reasonably design the size and shape of the detection hole and other parameters according to product requirements, which will not be described in detail here. The optional detection hole 18 is a circular hole with a diameter of 300μm, and the detection surface 17 is made of stainless steel. The detection calculation accuracy can be improved by reducing the size of the detection hole 18.

[0033] The detection system includes a displacement device 14, and the detection device 12 is arranged on the displacement device 14. The displacement device 14 can move longitudinally and horizontally rotate, wherein the direction X of the longitudinal movement is parallel to the optical fiber axis of the detection part 16, and the direction y of the horizontal rotation movement is the direction of circular movement. When the displacement device 14 moves longitudinally, it can drive the detection device 12 thereon to move longitudinally along the +X direction or the -X direction, then the vertical distance h between the detection hole 18 and the end of the detection part 16 changes. When the displacement device 14 rotates horizontally, it can drive the detection device 12 thereon to rotate horizontally around the detection part 16, then the running track of the detection device 12 should be the dotted line 19, during which the distance between the detection surface 17 and the detection part 16 is maintained at r, and the vertical distance between the detection hole 18 and the end of the detection part 16 is maintained at h. The displacement device 14 can adjust r and h.

[0034] As mentioned above, the detection process of the detection system is as follows:

[0035] 1. The displacement device 14 adjusts the displacement parameters of the detection device 12 so that the vertical distance h between the detection hole 18 and the end of the detection part 16 is 10 mm, and the vertical distance r between the detection surface 17 and the detection part 16 is 5 mm; the values ​​of r and h are only an example;

[0036] 2. The horizontal rotation angle of the displacement device 14 ranges from 0° to 360°, and the rotation displacement angle increment is Δθ, and Δθ=1° can be selected. The 0° position is preset and used as the first sampling point of the detection device 12, then the sampling points of the detection device 12 correspond to 0°, 1°, 2°, 3°, ..., 359° in sequence; in other embodiments, Δθ can also be set to other values, such as Δθ=5°;

[0037] 3. After the position adjustment of the detection device 12 is completed, the displacement device 14 drives the detection device 12 to perform horizontal rotation displacement according to the above rotation angle parameters, so that the detection surface 17 moves around the detection part 16; specifically, the detection device 12 is rotated to 0°, and a radiation energy value of the optical fiber 10 is sampled here; sequentially, the detection device 12 is rotated to 1°, and the second radiation energy value of the optical fiber 10 is sampled here; and by analogy, the detection device 12 is rotated to 359°, and the 360th radiation energy value of the optical fiber 10 is sampled here;

[0038] Fourth, use data analysis software to plot the 360 ​​collected radiation energy values ​​in a cylindrical coordinate system, where the radiation energy value of each sampling point is used as the radius value and the height h = 10mm is used as the z-axis coordinate value. If the figure formed in the coordinate system is a circle around the z-axis, then it is determined that the radiation energy distribution of the optical fiber is uniform, otherwise it is uneven. The size of the radiation energy of the optical fiber can also be analyzed;

[0039] 5. The detection work at the height level of h = 10mm is completed;

[0040] 6. The displacement device 14 further adjusts the height h of the detection device 12. For example, r=5mm is kept unchanged and h is adjusted to 13mm. According to the above steps one to five, the detection data and graphs at the height level of h=13mm can be obtained. Similarly, by adjusting h, the energy data at different heights h can be detected and plotted in the coordinate system.

[0041] If the energy distribution diagram at different height levels finally obtained in the coordinate system is similar to a spindle structure, that is, the energy at the end height or close to the end height of the detection part 16 is the largest (reflected in the maximum radius of the coil fitted at this height level), and then the radius (the actual radiation energy value collected) gradually decreases toward the upper and lower sides, then it means that the energy distribution of the optical fiber probe is uniform and meets the work requirements.

[0042] It should be noted that in the above steps 1 to 6, r remains unchanged at 5 mm, and h changes to obtain energy spectra at different height levels h. However, in other embodiments, r can be changed. For example, r = 8 mm, and the height h is adjusted. According to the above steps 1 to 6, energy spectra at different height levels when r = 8 mm can be obtained. The present invention does not specifically limit r and h.

[0043] In the present invention, the detection system can stabilize the relative position of the optical fiber axis and the displacement device during the detection process, and can also accurately detect the annular energy around the optical fiber, and use the optical fiber radiation energy detection technology to achieve high-precision and high-efficiency detection of special processed optical fibers. The detection system can be used in the fields of biomedicine, scientific research and teaching, and optoelectronic information to detect the radiation energy of optical fibers engraved in special fields and determine whether it meets the application scenario.

[0044] Figure 3 is a schematic diagram of another detection system provided by an embodiment of the present invention, Figure 4 yes Figure 3 A partial side view of the detection system shown. Figure 3 and Figure 4 As shown, the optional optical fiber fixing device 13 includes a climbing bracket 20, a suspension beam 21 and an optical fiber clamp 22. The climbing bracket 20 is connected to the optical fiber clamp 22 through the suspension beam 21; the optical fiber clamp 22 clamps the fixed part of the optical fiber 10; and the climbing bracket 20 is used to adjust the height of the suspension beam 21.

[0045] In this embodiment, the optical fiber fixing device 13 also includes a climbing mounting member 23 disposed on the climbing bracket 20, and the suspension beam 21 is connected to the climbing bracket 20 through the climbing mounting member 23. The climbing bracket 20 and the climbing mounting member 23 are used together to suspend the optical fiber clamp 22 through the suspension beam 21. By adjusting the height of the climbing mounting member 23 on the climbing bracket 20, the height of the suspension beam 21 can be adjusted, and then the height of the optical fiber clamp 22 can be adjusted. The optical fiber clamp 22 is a customized clamp that can clamp and fix optical fibers 10 of different sizes; or, the optical fiber clamp 22 has a through hole, and the optical fiber 10 is clamped and fixed by passing through the through hole on the optical fiber clamp 22. The optical fiber segment where the optical fiber 10 and the optical fiber clamp 22 are connected is the fixing portion of the optical fiber 10. Typically, the portion of the optical fiber 10 connected to the light source 11 is defined as the tail of the optical fiber 10 . It can also be said that the optical fiber clamp 22 is used to fix the tail of the optical fiber 10 , the light source 11 is connected to the tail end of the optical fiber 10 , and the detection portion of the optical fiber 10 is the front end of the optical fiber 10 .

[0046] The optional displacement device 14 includes a fiber guide 24, a sliding assembly 25, a rotational displacement platform 26 and a lifting displacement platform 27. The fiber guide 24 and the sliding assembly 25 are fixedly arranged on the same side of the rotational displacement platform 26. The fiber guide 24 has a guide hole, and the detection portion of the optical fiber 10 passes through the guide hole. The detection device 12 is connected to the sliding assembly 25, and the sliding assembly 25 is used to drive the detection device 12 to slide to adjust the distance r between the detection surface 17 and the detection portion of the optical fiber 10. The rotational displacement platform 26 is used for horizontal rotation to drive the detection device 12 to move around the detection portion of the optical fiber 10. The lifting displacement platform 27 is used for longitudinal (X) movement to drive the detection device 12 to move longitudinally. The optional lifting displacement platform 27 is located on the side of the rotational displacement platform 26 away from the detection device 12, and the lifting displacement platform 27 is used to drive the rotational displacement platform 26 to move longitudinally.

[0047] In this embodiment, the optical fiber guide 24 is a customized optical fiber straightening guide, which is used to detect the front end of the optical fiber 10 and perform axis guidance (X direction) straightening, and ensure that the distance between the axis of the detection part of the optical fiber 10 and the detection surface 17 is r as much as possible. The optical fiber guide 24 is similar to an inverted L shape, located on the side of the optical fiber 10, and the optical fiber guide 24 and the detection device 12 are fixedly arranged on the same side of the rotating displacement platform 26, so when the rotating displacement platform 26 rotates horizontally, it drives the optical fiber guide 24 and the detection device 12 to move synchronously, so that the optical fiber guide 24 and the detection device 12 will not collide, and the normal detection system can be ensured.

[0048] The optical fiber guide 24 has a guide hole, and the optical fiber 10 passes through the guide hole. Optionally, in the direction X of the optical fiber axis, the axis of the guide hole and the rotation displacement platform 26 overlap or coincide, but it is not limited to this. When the rotation displacement platform 26 rotates horizontally, it drives the optical fiber guide 24 to move, so when the optical fiber 10 passes through the guide hole, there is a small gap between the guide hole and the optical fiber 10, ensuring that the optical fiber guide 24 can rotate around the optical fiber 10 while guiding and positioning the optical fiber 10. The small gap can be 1 micron, etc. The axis of the guide hole and the rotation displacement platform 26 overlap or coincide, so the axis of the optical fiber 10 passing through the guide hole and the axis of the rotation displacement platform 26 coincide, which facilitates the rotation displacement platform 26 to perform horizontal rotation around the optical fiber 10. Regardless of whether the axis of the guide hole and the rotation displacement platform 26 overlap, since the optical fiber guide 24 and the detection device 12 are fixed on the same side of the rotation displacement platform 26, when the rotation displacement platform 26 rotates horizontally, the optical fiber guide 24 and the detection device 12 are in a relatively static state, so the distance r between the optical fiber axis and the detection device can be stable during the rotation process.

[0049] The optional sliding assembly 25 includes a groove ruler 28 and a slider 29. The groove ruler 28 is fixedly arranged on the rotation displacement platform 26, and the detection device 12 is connected to the groove ruler 28 through the slider 29. The optional groove ruler 28 is a dovetail groove ruler 28, which can more accurately control the distance r between the optical fiber 10 and the detection device 12. The dovetail groove ruler 28 and the slider 29 are used in conjunction with each other, and the detection device 12 is fixedly connected to the slider 29. The dovetail groove ruler 28 is fixed on the rotation displacement platform 26, and the slider 29 can slide on the dovetail groove ruler 28. When the slider 29 slides on the dovetail groove ruler 28, the detection device 12 is driven to slide to adjust the distance r between the detection surface 17 and the optical fiber 10. When the rotation displacement platform 26 performs horizontal rotation, the dovetail groove ruler 28 and the slider 29 are driven to rotate synchronously, thereby driving the detection device 12 to rotate around the optical fiber 10.

[0050] The lifting and displacement platform 27 is located on the side of the rotating displacement platform 26 away from the detection device 12. The lifting and displacement platform 27 moves longitudinally along the X direction, so it can drive the rotating displacement platform 26 to move longitudinally along the X direction, and then drive the detection device 12 to move longitudinally along the X direction, and the height h can be adjusted. Here, when the detection hole and the end of the optical fiber 10 are horizontally aligned, h=0; when the detection device 12 moves from the position of h=0 to the -X direction, h is less than 0; when the detection device 12 moves from the position of h=0 to the +X direction, h is greater than 0. When the lifting and displacement platform 27 moves longitudinally, the height increment can be 1 mm, that is, the height difference between adjacent height levels is 1 mm. For example, h=-5mm is a height level, and 360° detection is performed at this height level to obtain an energy distribution diagram corresponding to h=-5mm; then, h is adjusted to make h=-4mm, and 360° detection is performed at this height level to obtain an energy distribution diagram corresponding to h=-4mm; and so on, energy distribution diagrams of different height levels are obtained to judge the energy distribution of the optical fiber.

[0051] Figure 3 The detection process of the detection system shown is:

[0052] First, the fiber optic clamp 22 is controlled at a suitable height through the cantilever arm 21, one end of the optical fiber 10 is connected to the laser 11, and the middle part of the optical fiber 10 is fixed by the customized fiber optic clamp 22. The distance between the fiber optic clamp 22 and the rotating displacement platform 26 must be debugged to ensure that the lifting displacement platform 27 does not collide with the optical fiber guide 24 used for straightening during the rising process, and determine h.

[0053] Next, the front end of the optical fiber 10 is inserted into the guide hole of the optical fiber guide 24 to ensure that the detection part of the optical fiber 10, that is, the processed bare fiber part and the protective layer are exposed, which is convenient for subsequent complete testing.

[0054] Next, adjust the slider to determine the test distance r between the detection surface 17 of the detection device 12 and the probe axis of the optical fiber 10, wherein the detection device 12 and the optical fiber guide 24 are both fixed on the rotation displacement platform 26, so the two remain in a relatively static state, and the optical fiber guide 24 can greatly optimize and reduce the change of the distance r during the entire test process.

[0055] Next, the rotation displacement angle Δθ is adjusted to achieve uniform detection and recording of the annular sampling points within a range of 360°.

[0056] Next, after completing the detection work at one height level, the height of the lifting and displacement platform 27 is adjusted to detect the energy surfaces at different height levels h.

[0057] Next, use data analysis software to plot and analyze the collected data, use the energy amplitude of the collected sampling points at different height levels as the radius value, and plot the measured height h as the z-axis coordinate in the cylindrical coordinate system, and judge whether the energy distribution of the fiber optic probe meets the work requirements based on the energy diagram. If the detection starts from h less than 0 to h greater than 0, then the fiber optic energy distribution diagram that meets the actual use requirements is similar to a spindle structure, that is, the energy at or near the tip height of the fiber optic probe is the largest, which is reflected in the largest radius of the coil fitted at this height level, and then the radius (actual energy value collected) gradually decreases from the upper and lower sides.

[0058] Figure 5 is a schematic diagram of another detection system provided by an embodiment of the present invention. Figure 5As shown, the optional displacement device includes a fiber guide 31, a sliding assembly 32, a rotation displacement platform 33 and a lifting displacement platform 34. The fiber guide 31 and the sliding assembly 32 are fixedly arranged on the same side of the rotation displacement platform 33; the fiber guide 31 has a guide hole, and the detection part of the optical fiber 10 passes through the guide hole; the detection device 12 is connected to the sliding assembly 32, and the sliding assembly 32 is used to drive the detection device 12 to slide to adjust the distance r between the detection surface 17 and the detection part of the optical fiber 10; the rotation displacement platform 33 is used for horizontal rotation to drive the detection device 12 to move around the detection part of the optical fiber 10; the lifting displacement platform 34 is used for longitudinal (X) movement to drive the detection device 12 to move longitudinally. The optional fiber guide 31 is fixedly arranged in the central area of ​​the rotation displacement platform 33, and the detection device 12 is connected to the sliding assembly 32 through the lifting displacement platform 34, and the lifting displacement platform 34 is used to directly drive the detection device 12 to move longitudinally. The optional sliding assembly 32 includes a groove ruler 35 and a slider 36, and the groove ruler 35 is fixedly arranged on the rotation displacement platform 33, and the detection device 12 is connected to the groove ruler 35 through the slider 36. The optional detection device 12 is connected to the lifting displacement platform 34 through an optical connecting rod 37, and the optical fiber guide 31 is arranged on the rotating displacement platform 33 through a bearing 38. The rotating displacement platform 33 also has an optical supporting rod 39.

[0059] In this embodiment, the lifting displacement platform 34 is used to drive the detection device 12 to move longitudinally (X). The dovetail groove ruler 35 and the slider 36 are used together to drive the detection device 12 to move radially forward and backward. The optical fiber guide 31 supports and orients the optical fiber 10 during the test, improves and optimizes the verticality r between the axis of the optical fiber 10 and the detection surface 17. In the X direction, the axis of the optical fiber 10 and the rotation displacement platform 33 coincide, so that the spacing r between the optical fiber axis and the detection device can be stable during the rotation process. The bearing 38 is a ball bearing, which is used to improve the coaxiality of the optical fiber guide 31 and the table of the rotation displacement platform 33 during the test, and to perform relative rotation. The rotation displacement platform 33 is used to drive the rotation of the detection device 12, and its rotation angle θ ranges from 0°≤θ<360°. The wavelength of the laser light source 11 is 1064nm, which is a continuous output laser. The fixing part of the optical fiber 10 connected to the light source 11 and the detection part connected to the optical fiber guide 31 are optionally in a vertical direction.

[0060] As mentioned above, the detection process of the detection system is:

[0061] First, the optical fiber 10 to be processed is passed through the guide hole of the optical fiber guide 31 and fixed. The optical fiber 10 passing through the guide hole exposes the bare fiber and the protective layer part, which is convenient for the subsequent complete test.

[0062] Next, the height of the lifting platform 34 is adjusted, and the slider 35 is slid to adjust the distance r between the detection device 12 and the optical fiber 10, so as to determine the test radius r and the test starting height h.

[0063] Next, the rotation angle of the rotation displacement platform 33 is adjusted to achieve uniform detection and recording of the annular sampling points within a range of 360°.

[0064] Next, after completing the detection work at a height level, adjust the lifting displacement platform 34 to adjust the height h, and then detect the energy surface of the height level h.

[0065] In the next step, the collected data is analyzed using data analysis software. The energy amplitude of the sampling points at different height levels is used as the radius value, and the measured height h is used as the z-axis coordinate to be plotted in the cylindrical coordinate system to determine whether the energy distribution of the fiber optic probe meets the work requirements.

[0066] Figure 6 is a schematic diagram of a detection method provided by an embodiment of the present invention. The detection method is applied to the detection system described in any of the above embodiments, and the detection method is executed by a detection device, which is implemented by software and / or hardware. The detection system stores the 1st to Nth preset heights arranged from small to large, where N is greater than or equal to 1.

[0067] like Figure 6 As shown, the detection method includes:

[0068] Step 101, the displacement device adjusts the position of the detection device so that the vertical distance between the detection hole and the end of the detection part is the i-th preset height, and the vertical distance between the detection surface and the detection part is the first target spacing, i is greater than or equal to 1 and less than or equal to N;

[0069] Step 102: The displacement device controls the displacement of the detection device to make the detection device move around the detection part;

[0070] Step 103: The detection device detects the detection part to obtain radiation information of the detection part at the i-th preset height and the first target distance.

[0071] N can be an odd number greater than 1, the kth preset height is equal to 0, and k=(N+1) / 2.

[0072] In this embodiment, the detection system stores the first to Nth preset heights arranged from small to large, N is greater than or equal to 1, and the preset height is the vertical distance h between the detection hole and the end of the detection part. Assuming N=3, the second preset height is 0, that is, the vertical distance between the detection hole and the end of the detection part is equal to 0.

[0073] refer to Figure 3 or Figure 5, the first preset height h1 can be a height level at which the detection device 12 moves from the position h=0 along the -X direction, and h1 is less than 0; the third preset height h3 can be a height level at which the detection device 12 moves from the position h=0 along the +X direction, and h3 is greater than 0; the absolute value of h1 can be equal to the absolute value of h3. If N=5, the absolute value of the first preset height can be equal to the absolute value of the fifth preset height, the absolute value of the second preset height can be equal to the absolute value of the fourth preset height, and so on.

[0074] The displacement device adjusts the position of the detection device to control the vertical distance h between the detection hole and the end of the detection part and the vertical distance r between the detection surface and the detection part. After h and r are moved into place, the displacement device controls the displacement of the detection device to move the detection device around the detection part of the optical fiber. The detection device detects the detection part and obtains the radiation information of the detection part at the current height level h and r.

[0075] In the present invention, optical fiber radiation energy detection technology can be used to achieve high-precision and high-efficiency detection of special processed optical fibers. The detection method can be used in the fields of biomedicine, scientific research and teaching, optoelectronic information, etc. to detect the radiation energy of optical fibers engraved in special fields and determine whether they meet the application scenarios. The detection method can accurately detect the annular energy around the optical fiber, and can also stabilize the relative position of the optical fiber axis and the displacement device during the detection process.

[0076] Take the optical fiber used in minimally invasive surgery as an example. Minimally invasive surgery, as a new type of treatment, has achieved rapid development and progress in the medical field. This technology is to perform surgical operations on lesions, necrosis, and deformed structures in living tissues by making tiny incisions on patients. Laser interstitial thermal therapy (LITT) is a percutaneous minimally invasive surgery guided by MRI magnetic resonance imaging. A key element of LITT therapy is the stereotactic method. The stereotactic method is to accurately position the laser probe optical fiber within the treatment target, and the surgical laser system ablates the thermal tissue over time. The matching MRI thermal imager can monitor temperature changes and tissue damage in real time. The laser probe optical fiber used in LITT therapy adopts a special processing method, so that the laser probe optical fiber radiates energy from the optical fiber axis to the surroundings, and no light is emitted from the end face. At present, conventional detection methods cannot evenly and effectively detect the size and uniformity of the optical fiber radiation energy, resulting in the inability to accurately ablate the target thermal tissue during surgery. The detection method of the present invention can detect the size and uniformity of the radiation energy of the optical fiber axis, thereby improving the accuracy of surgery.

[0077] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0078] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection system, characterized in that: include: An optical fiber, a light source, a detection device, an optical fiber fixing device and a displacement device, wherein the optical fiber includes a fixing part and a detection part; The optical fiber fixing device is connected to the fixing part and is used to fix the optical fiber; The light source is connected to the end of the fixing portion and is used to input an optical signal to the optical fiber; The detection device has a detection surface, the detection surface has a detection hole, the detection surface faces the detection part and the two are arranged at a distance, the detection surface is parallel to the optical fiber axis of the detection part, and the detection device is used to detect the radiation information of the detection part through the detection hole; The detection device is arranged on the displacement device, and the displacement device is used to control the displacement of the detection device so that the detection surface moves around the detection part and adjusts the vertical distance between the detection hole and the end of the detection part.

2. The detection system according to claim 1, characterized in that: The detection device comprises a thermal power sensor located on the side of the detection surface facing away from the optical fiber; The thermal power probe is used to collect the radiation amount of the detection part through the detection hole.

3. The detection system according to claim 1, characterized in that: The detection hole has a size greater than 100 μm and less than 500 μm along a first direction, and a size greater than 100 μm and less than 500 μm along a second direction. The first direction is parallel to the optical fiber axis of the detection portion, and the second direction is perpendicular to the first direction.

4. The detection system according to claim 1, characterized in that: The optical fiber fixing device comprises a climbing bracket, a suspension beam and an optical fiber clamp, wherein the climbing bracket is connected to the optical fiber clamp via the suspension beam; The optical fiber clamp clamps the fixing portion; The climbing bracket is used to adjust the height of the suspension beam.

5. The detection system according to claim 1, characterized in that: The displacement device comprises an optical fiber guide, a sliding assembly, a rotating displacement platform and a lifting displacement platform, wherein the optical fiber guide and the sliding assembly are fixedly arranged on the same side of the rotating displacement platform; The optical fiber guide has a guide hole, and the detection part passes through the guide hole; The detection device is connected to the sliding assembly, and the sliding assembly is used to drive the detection device to slide to adjust the distance between the detection surface and the detection part; The rotary displacement platform is used for horizontal rotation to drive the detection device to move around the detection part; The lifting and displacement platform is used for longitudinal movement to drive the detection device to move longitudinally.

6. The detection system according to claim 5, characterized in that: The lifting and displacement platform is located at a side of the rotating displacement platform away from the detection device, and the lifting and displacement platform is used to drive the rotating displacement platform to perform longitudinal movement.

7. The detection system according to claim 5, characterized in that: The optical fiber guide is fixedly arranged in the central area of ​​the rotating displacement platform, the detection device is connected to the sliding assembly through the lifting displacement platform, and the lifting displacement platform is used to directly drive the detection device to move longitudinally.

8. The detection system according to claim 5, characterized in that: The sliding assembly comprises a groove ruler and a sliding block. The groove ruler is fixedly arranged on the rotation displacement platform, and the detection device is connected to the groove ruler via the sliding block.

9. A detection method, characterized in that: Applied to the detection system according to any one of claims 1 to 8, wherein the detection system stores the first to Nth preset heights arranged from small to large, N being greater than or equal to 1, and the detection method comprises: The displacement device adjusts the position of the detection device so that the vertical distance between the detection hole and the end of the detection portion is an i-th preset height, and the vertical distance between the detection surface and the detection portion is a first target spacing, i is greater than or equal to 1 and less than or equal to N; The displacement device controls the displacement of the detection device so that the detection device moves around the detection part; The detection device detects the detection part to obtain radiation information of the detection part at the i-th preset height and the first target distance.

10. The detection method according to claim 9, characterized in that: N is an odd number greater than 1, the kth preset height is equal to 0, and k=(N+1) / 2.

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