Detector adjusting mechanism

Abstract

The invention discloses a detector adjusting mechanism, and belongs to the technical field of X-ray imaging. The mechanism comprises a mounting shell and a mounting plate fixed in the mounting shell. A transverse adjusting assembly is arranged on the front face of the mounting plate and comprises a closed-loop synchronous cog belt transmission system driven by a first servo motor and a toothed plate meshed with the cog belt, and the toothed plate drives the moving seat to transversely move along the first sliding rail. The longitudinal adjusting assembly is installed on the moving seat, a second servo motor drives a threaded rod to rotate through a synchronous belt, a mounting seat in threaded connection with the threaded rod is driven to longitudinally move along a second vertical sliding rail, and the detector body is fixed to the front face of the mounting seat. A clamping assembly matched with the clamping plate on the side wall of the mounting base is arranged on the inner wall of the rear side of the mounting shell and used for position locking. According to the invention, automatic precision adjustment of the detector in the transverse direction and the longitudinal direction is realized, the detector can be stably locked, the problem of detector deviation caused by vibration of a vehicle-mounted CT is effectively solved, and the imaging quality and the system automation level are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of X-ray imaging technology, in particular to a detector adjusting mechanism. BACKGROUND

[0002] The computer tomography device has important application value in medical diagnosis and industrial detection. With the growth of on-site rapid diagnosis demand, the vehicle-mounted mobile CT system gradually becomes the industry development trend. However, the mobile operation environment brings significant challenges to the imaging quality. The complex dynamic load such as the continuous jolt generated by the uneven road surface during the vehicle driving, the periodic vibration caused by the engine operation, the inertial impact force in the vehicle start-stop stage, etc. can easily cause the micron-level displacement offset of the detector assembly relative to the ray source or the scanning object. Such displacement will destroy the geometric consistency of the projection data acquisition, and generate motion artifacts, edge blur and structure distortion in the image reconstruction process, which seriously affects the reliability and detection accuracy of the diagnosis result. In the actual operation of the vehicle-mounted CT, the detector position offset problem is particularly prominent. The conventional solution relies on professional technicians to manually intervene after the vehicle is parked or during the scanning interval. The operator needs to use simple measuring tools to manually adjust the mechanical positioning components of the detector support for calibration. This process has multiple technical bottlenecks. First, the manual calibration is time-consuming and usually requires repeated measurement and adjustment, which seriously restricts the rapid response capability of the vehicle-mounted CT system, and is difficult to adapt to the application scenarios such as field operation and emergency rescue which require frequent movement and immediate deployment. Second, the calibration accuracy is highly dependent on the experience level and visual judgment of the operator, and lacks objective quantitative standards, resulting in unstable reset accuracy and failing to meet the stringent requirements of modern CT imaging on geometric accuracy. In addition, manual operation is easily disturbed by external factors such as environmental light and space limitations, further reducing the calibration reliability. Under the existing technical framework, the detector position calibration link has become a key obstacle to the automation level and imaging quality improvement of the vehicle-mounted mobile CT system. SUMMARY

[0003] The present application aims to provide a detector adjusting mechanism to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: According to one aspect of the present application, a detector adjusting mechanism comprises a mounting shell, a mounting plate is fixedly installed in the rear wall mounting port of the mounting shell, a through port is formed in the front surface of the mounting plate, a horizontal adjusting assembly is fixedly installed on the front surface of the mounting plate, a vertical adjusting assembly is fixedly arranged on the horizontal adjusting assembly, a detector body is fixedly arranged on the front surface of the vertical adjusting assembly, a clamping assembly is fixedly installed on the rear inner wall of the mounting shell, and the clamping assembly is matched with the vertical adjusting assembly. The lateral adjusting assembly of the detector adjusting mechanism according to at least one of the embodiments of the present application comprises a servo motor I and a bearing seat fixedly installed on the front face of the mounting plate, the output end of the servo motor I penetrates through the through port, and a main gear I is fixedly installed, a slave gear I is rotatably installed on the rear side of the bearing seat, and the periphery of the main gear I and the slave gear I is jointly meshed with a tooth belt I. The lateral adjusting assembly of the detector adjusting mechanism according to at least one of the embodiments of the present application further comprises a moving seat, two parallel sliding blocks I are fixedly installed on the rear side of the moving seat, two parallel sliding rails I are fixedly installed on the front face of the mounting plate, the sliding blocks I are slidingly connected with the sliding rails I, a tooth plate is fixedly installed on the rear side of the moving seat, the tooth plate penetrates through the through port, and is meshed with the tooth belt I. The longitudinal adjusting assembly of the detector adjusting mechanism according to at least one of the embodiments of the present application comprises an upper connecting plate and a lower connecting plate fixedly installed on the upper side and the lower side of the front face of the moving seat respectively, and a threaded rod is jointly rotatably installed between the upper connecting plate and the lower connecting plate. The bottom of the upper connecting plate of the detector adjusting mechanism according to at least one of the embodiments of the present application is fixedly installed with a servo motor II, the output end of the servo motor II penetrates through the upper connecting plate and extends above the upper connecting plate, and a main gear II is fixedly connected, the top end of the threaded rod penetrates through the upper connecting plate and extends above the upper connecting plate, and a slave gear II is fixedly connected, and the periphery of the slave gear II and the main gear II is jointly meshed with a tooth belt II. The longitudinal adjusting assembly of the detector adjusting mechanism according to at least one of the embodiments of the present application further comprises a mounting seat, the detector body is fixedly installed on the front face of the mounting seat, the mounting seat is sleeved on the periphery of the threaded rod, and is threadedly connected with the threaded rod, a sliding block II is fixedly installed on the bottom of the mounting seat, a sliding rail II is fixedly installed on the front face of the moving seat, and the sliding block II is slidingly connected with the sliding rail II.

[0005] The side wall of the mounting seat of the detector adjusting mechanism according to at least one of the embodiments of the present application is fixedly installed with a clamping plate, the detector body cooperates with the clamping plate, and the clamping assembly is correspondingly arranged with the clamping plate. The through port of the detector adjusting mechanism according to at least one of the embodiments of the present application is in a long strip structure, which is used for avoiding the lateral movement of the tooth plate and the penetration installation of the output end of the servo motor I. The sliding rail I and the sliding block I of the detector adjusting mechanism according to at least one of the embodiments of the present application constitute a high-precision straight line guide structure, which is used for limiting the moving direction of the moving seat to be a lateral straight line. The sliding rail II and the sliding block II of the detector adjusting mechanism according to at least one of the embodiments of the present application constitute a high-precision straight line guide structure, which is used for limiting the moving direction of the mounting seat to be a longitudinal straight line, and preventing the mounting seat from rotating with the threaded rod. The main gear one, the slave gear one and the tooth belt one constitute a closed loop synchronous toothed belt transmission system for transmitting the rotating motion of the servo motor one. The main gear two, the slave gear two and the tooth belt two constitute a synchronous transmission structure for transmitting the rotating motion of the servo motor two to the threaded rod. The servo motor one and the bearing seat are symmetrically distributed on the front face of the mounting plate, ensuring the uniform tension of the tooth belt one. The clamping assembly is mounted on the inner wall of the rear side of the mounting shell, and the execution end thereof cooperates with the clamped plate to lock the position of the longitudinal adjustment assembly.

[0006] Compared with the prior art, the present application has the following advantages: When the position of the detector body needs to be calibrated and adjusted, the control system sends a command to the servo motor one, the servo motor one drives the main gear one to rotate, the main gear one drives the slave gear one to rotate synchronously in the bearing seat through the tooth belt one engaged therewith, the tooth surface of the tooth belt one is engaged with the teeth of the tooth plate, converting the linear motion of the tooth belt into the equidistant linear displacement of the tooth plate, the tooth plate drives the moving seat to move linearly along the slide rail one with high precision, the movement of the moving seat drives the entire longitudinal adjustment assembly and the detector body on the moving seat to move to the target position in the transverse direction, the control system simultaneously or sequentially sends a command to the servo motor two, the servo motor two drives the main gear two to rotate, the main gear two drives the slave gear two to rotate synchronously through the tooth belt two engaged therewith, the slave gear two is fixedly connected to the top end of the threaded rod, thereby driving the threaded rod to rotate, since the slider two is strictly constrained on the slide rail two, the mounting seat cannot rotate, therefore, the rotating motion of the threaded rod is forcibly converted into the precise linear lifting motion of the mounting seat along the length direction of the slide rail two, the detector body fixed on the front face of the mounting seat moves to the target position in the longitudinal direction, through these settings, the present device completely replaces the traditional manual, empirical and time-consuming calibration operation by engineers on the vehicle, significantly improving the working efficiency, imaging quality reliability and system automation level of the vehicle-mounted CT. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a front view of the overall structure of the detector adjustment mechanism embodiment of the present application, Figure 2 is a front view of the overall structure of the detector adjustment mechanism embodiment of the present application, Figure 3is a schematic view of the back side of the overall structure of the adjusting mechanism of the detector of the present application, Figure 4 is a schematic view of the side cut of the overall structure of the adjusting mechanism of the detector of the present application.

[0008] Reference signs: 1, mounting shell 11, mounting plate 12, through hole 2, transverse adjusting assembly 21, servo motor one 22, bearing seat 23, main gear one 24, from gear one 25, toothed belt one 26, moving seat 27, sliding block one 28, sliding rail one 29, toothed plate 3, longitudinal adjusting assembly 31, upper connecting plate 32, lower connecting plate 33, threaded rod 34, servo motor two 35, main gear two 36, from gear two 37, toothed belt two 38, mounting seat 39, sliding block two 310, sliding rail two 311, clamped plate 4, detector body 5, clamping assembly DETAILED DESCRIPTION The present application will be further described below in conjunction with embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and are not a limitation on the present application.

[0009] The present disclosure will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content, and are not a limitation on the present disclosure.

[0010] It should be noted that the embodiments and features in the present disclosure can be combined with each other without conflict.

[0011] Unless otherwise stated, the exemplary embodiments / embodiments shown will be understood to provide exemplary features of various details that can implement the technical concepts of the present disclosure in practice.

[0012] In some embodiments of the present disclosure, the probe adjusting mechanism of the present disclosure comprises: a mounting shell 1, a mounting plate 11 is fixedly mounted in the rear wall mounting opening of the mounting shell 1, a through opening 12 is formed in the front surface of the mounting plate 11, a transverse adjusting assembly 2 is fixedly mounted on the front surface of the mounting plate 11, a longitudinal adjusting assembly 3 is fixedly arranged on the transverse adjusting assembly 2, a probe body 4 is fixedly arranged on the front surface of the longitudinal adjusting assembly 3, a clamping assembly 5 is fixedly mounted on the rear inner wall of the mounting shell 1, and the clamping assembly 5 is matched with the longitudinal adjusting assembly 3.

[0013] Reference Figures 1-4 In some embodiments of the present disclosure, the transverse adjusting assembly 2 is used to drive the longitudinal adjusting assembly 3 and the probe body 4 to perform precise linear displacement adjustment in the horizontal direction (i.e. X direction), and the transverse adjusting assembly 2 is composed of a servo motor one 21, a bearing seat 22, a main gear one 23, a slave gear one 24, a toothed belt one 25, a moving seat 26, a sliding block one 27, a sliding rail one 28 and a toothed plate 29. The servo motor one 21 is a direct current servo motor or a stepping motor with encoder feedback.

[0014] The servo motor one 21 and the bearing seat 22 are symmetrically distributed on the front surface of the mounting plate 11 to ensure the uniform tension of the toothed belt one 25. The servo motor one 21 and the bearing seat 22 are symmetrically distributed on the front surface of the mounting plate 11, and they are symmetrically arranged on the front surface of the mounting plate 11 with the center line of the through opening 12 as the axis of symmetry, or they are symmetrically arranged on the front surface of the mounting plate 11 with the perpendicular line of the theoretical center line of the main gear one 23 and the slave gear one 24 as the axis of symmetry, or they are symmetrically arranged on the front surface of the mounting plate 11 around the theoretical envelope center of the toothed belt one 25.

[0015] In some embodiments of the present disclosure, the main gear one 23, the slave gear one 24 and the toothed belt one 25 constitute a closed-loop synchronous toothed belt transmission system for transmitting the rotary motion of the servo motor one 21. The main gear one 23 is fixedly mounted on the involute spur cylindrical gear at the output end of the servo motor one 21. The slave gear one 24 is rotatably mounted on the passive synchronous gear at the rear side of the bearing seat 22, and its tooth profile, module and number of teeth are strictly consistent with those of the main gear one 23 to ensure the meshing compatibility. The toothed belt one 25 is an annular synchronous toothed belt, and its pitch, tooth profile angle, belt width and material are completely matched with the tooth parameters of the main gear one 23 and the slave gear one 24. The inner side tooth surface of the toothed belt one 25 is precisely meshed with the outer side teeth of the main gear one 23 and the slave gear one 24 to form a non-slip positive meshing transmission path. The annular structure of the toothed belt one 25 makes it form a closed loop between the main gear one 23 and the slave gear one 24. The closed loop maintains a constant pitch line length in the tension state, so that the tension of each section of the toothed belt one 25 tends to be balanced during operation, avoiding local overload or relaxation jitter. The closed-loop synchronous toothed belt transmission system is composed of the closed power transmission structure formed by the main gear one 23, the slave gear one 24 and the toothed belt one 25 arranged around the outer periphery thereof.

[0016] In some embodiments of the present disclosure, the lateral adjustment assembly 2 further comprises a moving seat 26, the rear side of the moving seat 26 is fixedly installed with two parallel sliding blocks I 27, the front side of the mounting plate 11 is fixedly installed with two parallel sliding rails I 28, the sliding blocks I 27 are in sliding connection with the sliding rails I 28, the rear side of the moving seat 26 is fixedly installed with a tooth plate 29, the tooth plate 29 penetrates through the through port 12 and is engaged with the tooth belt I 25, the moving seat 26 can be an integral rigid support structure made of metal material, used for bearing the longitudinal adjustment assembly 3 and the detector body 4, the rear surface of the moving seat 26 is provided with a countersunk screw hole for installing the tooth plate 29 and a mounting plane for fixing the sliding blocks I 27, the through port 12 is a long strip structure, the length direction of the through port 12 is consistent with the extension direction of the sliding rails I 28, the width of the through port 12 is slightly greater than the sum of the thickness of the tooth plate 29 and the thickness of the tooth belt I 25, and the height of the through port 12 is slightly greater than the sum of the tooth height of the tooth plate 29 and the installation gap, used for avoiding the space requirement of the tooth plate 29 during lateral movement and the penetration installation of the output end of the servo motor I 21, and the edge of the through port 12 can be chamfered or deburred to avoid scratching the tooth belt I 25 or interfering with the movement of the tooth plate 29.

[0017] In the preferred embodiments of the present disclosure, the sliding rails I 28 and the sliding blocks I 27 constitute a high-precision linear guide rail structure, used for limiting the moving direction of the moving seat 26 to be lateral straight line, the sliding rails I 28 are fixedly installed on the front side of the mounting plate 11 as two mutually parallel rigid guide rails, the cross-sectional shape of the sliding rails I 28 is T-shaped, swallow-tailed, rectangular or cylindrical, the mounting reference surface of the sliding rails I 28 is in high planeness cooperation with the front side of the mounting plate 11, fastened by countersunk bolts, to ensure that the axial direction is strictly parallel to the preset lateral coordinate axis, the sliding blocks I 27 are two matching sliding units fixedly installed on the rear side of the moving seat 26, the inner cavity structure of the sliding blocks I 27 is adapted to the shape of the sliding rails I 28, for example, when the sliding rails I 28 are T-shaped, the sliding blocks I 27 are internally provided with corresponding T-shaped grooves, rolling bodies are embedded in the sliding blocks I 27 to form rolling friction structure, or self-lubricating engineering plastic gaskets are adopted to form sliding friction structure, and the sliding blocks I 27 are provided with pre-tightening structure between the sliding blocks I 27 and the sliding rails I 28.

[0018] The high-precision linear guide rail structure is jointly constituted by the sliding rails I 28 and the sliding blocks I 27, when the tooth plate 29 is driven by the tooth belt I 25 to generate lateral thrust, the sliding blocks I 27 are constrained in the sliding rails I 28 and can only move in the axial direction of the sliding rails I 28 to make pure translation movement, thereby completely limiting the rotation freedom of the moving seat 26 around the X, Y and Z axes and the longitudinal and vertical translation freedom, so that the movement freedom of the moving seat 26 is constrained to be linear displacement along the lateral coordinate axis.

[0019] Reference Figures 1-4In some embodiments of the present disclosure, the longitudinal adjustment assembly 3 is used to drive the precise linear lifting adjustment of the probe body 4 in the vertical direction (i.e. Z direction), and the longitudinal adjustment assembly 3 is composed of an upper connecting plate 31, a lower connecting plate 32, a threaded rod 33, a servo motor two 34, a main gear two 35, a slave gear two 36, a toothed belt two 37, a mounting seat 38, a sliding block two 39, a sliding rail two 310, and a clamped plate 311. The mounting seat 38 is a cast aluminum or sheet metal bent and welded structure, the inner thread of which forms a transmission structure with the threaded rod 33, and the outer contour is provided with a mounting interface matched with the sliding block two 39. The sliding rail two 310 and the sliding block two 39 form another set of independent high-precision linear guide rail structures, which are arranged in the vertical direction perpendicular to the sliding rail one 28. The clamped plate 311 is an L-shaped or T-shaped steel plate fixed to the side wall of the mounting seat 38.

[0020] In the preferred embodiments of the present disclosure, the longitudinal adjustment assembly 3 includes an upper connecting plate 31 and a lower connecting plate 32 fixedly installed on the front upper and lower sides of the moving seat 26, respectively. The threaded rod 33 is rotatably installed between the upper connecting plate 31 and the lower connecting plate 32. The upper connecting plate 31 is a metal plate structure fixedly installed on the top region of the front of the moving seat 26. The upper connecting plate 31 is fastened to the front of the moving seat 26 by bolts, and the installation position thereof is matched with the structural strength distribution of the moving seat 26. The bottom of the upper connecting plate 31 is provided with a mounting boss or a counterbore for mounting the servo motor two 34, and the upper surface thereof is provided with a bearing mounting position for assembling a radial contact ball bearing or an angular contact ball bearing supporting the top end of the threaded rod 33. The lower connecting plate 32 is a metal plate structure fixedly installed on the bottom region of the front of the moving seat 26, and is rigidly connected with the moving seat 26 by bolts or welding. The upper surface of the lower connecting plate 32 is provided with a bearing mounting position for assembling a deep groove ball bearing or a cylindrical roller bearing supporting the bottom end of the threaded rod 33. The top end and the bottom end of the threaded rod 33 are respectively constrained by bearings in the bearing mounting positions of the upper connecting plate 31 and the lower connecting plate 32, so as to realize stable rotation around the axis of the threaded rod 33 without axial movement and radial shaking. The axis direction of the threaded rod 33 is perpendicular to the front of the moving seat 26, i.e. parallel to the longitudinal adjustment direction of the probe body 4. The rotational movement of the threaded rod 33 is converted into the precise linear displacement of the mounting seat 38 in the vertical direction under the subsequent thread cooperation with the mounting seat 38 and the guidance constraint of the sliding rail two 310. The upper connecting plate 31 and the lower connecting plate 32 respectively provide the rotation supporting points of the two ends of the threaded rod 33, and cooperatively form a double-support-point simply supported structure. This structure can effectively inhibit the bending deformation and resonance tendency of the threaded rod 33 under the vehicle-mounted vibration working condition, and significantly improve the bending stiffness and rotational stability compared with single-end cantilever support.

[0021] In some embodiments of the present disclosure, the bottom of the upper connecting plate 31 is fixedly mounted with a servo motor two 34, the output end of the servo motor two 34 penetrates through the upper connecting plate 31 and extends above the upper connecting plate 31, and is fixedly connected with a main gear two 35, the top end of the threaded rod 33 penetrates through the upper connecting plate 31 and extends above the upper connecting plate 31, and is fixedly connected with a slave gear two 36, a toothed belt two 37 is sleeved around the periphery of the slave gear two 36 and the main gear two 35 in common engagement, the upper connecting plate 31 is a rigid connecting plate for supporting and positioning the upper end of the threaded rod 33 in the longitudinal adjustment assembly, and providing an installation reference for the servo motor two 34, and the upper connecting plate 31 is fastened to the front top of the moving seat 26 by bolts, and the installation face thereof is perpendicular to the surface of the moving seat 26.

[0022] The housing of the servo motor two 34 is fixed to the bottom of the upper connecting plate 31 through a flange or a base, and during installation, the center line of the output shaft is ensured to be coaxial with the reserved through hole in the upper connecting plate 31, the control signal line of the servo motor two 34 is led out through the cable through hole on the side of the upper connecting plate 31, the main gear two 35 is a spur gear or a synchronous pulley, the inner hole thereof is fixed to the output shaft of the servo motor two 34 in an interference fit or a key connection mode, the tooth profile parameters of the main gear two 35 are adapted to the toothed belt two 37, the threaded rod 33 is used to be fixed to the slave gear two 36 through a locking screw or a key structure, the lower end of the threaded rod 33 is supported on the lower connecting plate 32 through a bearing, and the upper end thereof is extended after penetrating through the upper connecting plate 31, and the length of the extended section is sufficient to enable the slave gear two 36 to be located above the upper connecting plate 31, the slave gear two 36 is a synchronous pulley or a spur gear with the same parameters as the main gear two 35, the inner hole thereof is connected to the top end of the threaded rod 33 in an interference fit or a key connection, the pitch and the number of teeth of the toothed belt two 37 are matched with the main gear two 35 and the slave gear two 36, the toothed belt two 37 forms a closed loop transmission around the periphery of the main gear two 35 and the slave gear two 36, the tension of the toothed belt two 37 is realized by adjusting the installation position of the servo motor two 34 or adding a tension pulley, and the toothed belt two 37 has elastic buffering characteristics, and can absorb part of vibration energy during starting and stopping of the servo motor two 34 and speed changing.

[0023] In some embodiments of the present disclosure, the main gear two 35, the driven gear two 36 and the toothed belt two 37 constitute a synchronous transmission structure for transmitting the rotary motion of the servo motor two 34 to the threaded rod 33. The main gear two 35 is a cylindrical spur gear or helical gear fixedly connected to the output end of the servo motor two 34. The driven gear two 36 is a cylindrical spur gear or helical gear fixedly installed at the top end of the threaded rod 33. The axial positioning is achieved by matching the stop washer or lock nut through the bearing hole on the upper connecting plate 31 to prevent axial movement. The tooth profile parameters of the driven gear two 36 match those of the main gear two 35 to ensure smooth meshing. The toothed belt two 37 is a synchronous tooth profile belt with a steel wire core line embedded in a polyurethane matrix. The inner tooth surface of the toothed belt two 37 precisely meshes with the outer tooth of the main gear two 35, and the outer tooth surface precisely meshes with the outer tooth of the driven gear two 36, forming a double-meshing closed-loop synchronous transmission path. The synchronous transmission structure consists of the main gear two 35, the driven gear two 36 and the toothed belt two 37, which form a power transmission system with no slip, high rigidity and low inertia. The transmission ratio is equal to the inverse ratio of the number of teeth of the main gear two 35 and the driven gear two 36, that is, This structure does not rely on friction to transmit torque, avoiding the slippage, loss of rotation or response delay caused by insufficient tensioning of traditional flat belts or V-belts. The dynamic response time can be controlled within milliseconds, meeting the real-time requirements of vehicle-mounted CT systems for fast and accurate longitudinal position resetting in a vibrating environment. The tensioning state of the toothed belt two 37 in the synchronous transmission structure can be achieved by adjusting the installation position of the servo motor two 34 at the bottom of the upper connecting plate 31.

[0024] In the preferred embodiments of the present disclosure, the longitudinal adjustment assembly 3 further comprises a mounting seat 38, the probe body 4 is fixedly installed on the front face of the mounting seat 38, the mounting seat 38 is sleeved on the periphery of the threaded rod 33 and is threadedly connected with the threaded rod 33, the bottom of the mounting seat 38 is fixedly installed with a sliding block two 39, the front face of the moving seat 26 is fixedly installed with a sliding rail two 310, the sliding block two 39 is slidingly connected with the sliding rail two 310, the mounting seat 38 is a rigid support structure for carrying and positioning the probe body 4, and the main body thereof is a rectangular plate or a box-type frame structure. An internally threaded through hole is formed in the central area of the mounting seat 38, and the probe body 4 is fixed to the front face by bolts. The probe body 4 is an X-ray flat panel detector, and the type is amorphous silicon detector, amorphous selenium detector or CMOS detector. The connection between the probe body 4 and the front face of the mounting seat 38 is bolted fastening connection, quick release buckle connection or magnetic attraction connection. A buffer gasket is arranged between the back face of the probe body 4 and the front face of the mounting seat 38.

[0025] The mounting seat 38 is sleeved on the outer periphery of the threaded rod 33 and is in threaded connection with the threaded rod 33, that is, the mounting seat 38 is screwed on the threaded rod 33 through the central internal threaded hole, and the two constitute a movement structure relationship. The slider two 39 is a linear slider, internally integrated with a ball circulating system, and cooperates with the slide rail two 310 to form a rolling linear guide rail structure. The number of the slider two 39 is one or two, and the slider two 39 is symmetrically arranged on both sides of the bottom of the mounting seat 38. The slider two 39 and the mounting seat 38 are rigidly connected through a countersunk screw. The slide rail two 310 is a hard anodized aluminum alloy linear guide rail, and the cross-sectional shape is rectangular, T-shaped or convex-shaped. Limiting stoppers are arranged at both ends of the slide rail two 310 to prevent the mounting seat 38 from being disengaged at the limit position. The slider two 39 is in sliding connection with the slide rail two 310, and the slider two 39 moves linearly along the axial direction of the slide rail two 310. The movement is strictly constrained in a single degree of freedom, thereby completely limiting the rotational freedom of the mounting seat 38 around the axis of the threaded rod 33. When the threaded rod 33 rotates under the drive of the servo motor two 34, the mounting seat 38 can only produce axial displacement in the direction of the slide rail two 310 because the slider two 39 cannot rotate synchronously. The displacement ΔL and the number of rotations N of the threaded rod 33 and the lead P satisfy the relationship: ΔL = N × P.

[0026] In the preferred embodiment of the present disclosure, the slide rail two 310 and the slider two 39 form a high-precision linear guide rail structure for limiting the movement direction of the mounting seat 38 to be a longitudinal straight line, and preventing the mounting seat 38 from rotating with the threaded rod 33. The slide rail two 310 is a strip-shaped guide rail structure fixedly installed on the front of the moving seat 26, and the extension direction is perpendicular to the plane of the mounting plate 11 and parallel to the direction of gravity (i.e. the longitudinal direction). The cross-sectional shape is T-shaped, swallow-tailed or rectangular groove-shaped. The slider two 39 is a sliding matching component matched with the slide rail two 310, internally embedded with rolling bodies (such as balls or rollers) or using low-friction engineering plastic pads to reduce movement resistance and improve positioning repeatability. The slider two 39 is fixedly installed at the bottom of the mounting seat 38, and the installation position makes the movement center line of the slider two 39 parallel to the axis of the threaded rod 33. The slider two 39 and the slide rail two 310 are in clearance fit or pre-tightening fit. The high-precision linear guide rail structure is jointly formed by the slide rail two 310 and the slider two 39. When the threaded rod 33 rotates under the drive of the servo motor two 34, the mounting seat 38 has a tendency to move in the direction of the thread rise angle due to the threaded connection with the threaded rod 33. However, the slider two 39 is rigidly constrained in the guide groove of the slide rail two 310, and is only allowed to linearly slide in the axial direction of the slide rail two 310, thereby completely suppressing the rotational freedom of the mounting seat 38 around the axis of the threaded rod 33, and strictly decoupling the movement output of the threaded structure into a single longitudinal linear displacement. The longitudinal straight line is a spatial straight line path parallel to the normal of the imaging surface of the detector body 4 and perpendicular to the transverse adjustment direction, which is consistent with the main direction of the detector offset caused by the vehicle pitch vibration in the vehicle-mounted CT system, and thus can compensate for this kind of disturbance, As an optional variant, the slide rail two 310 and the slider two 39 can also be replaced by a cross roller guide structure, which is composed of two groups of mutually orthogonal rollers, which can provide equivalent longitudinal guiding accuracy while additionally enhancing the resistance to lateral and vertical interference forces, or the slide rail two 310 can be integrated into the cast body of the moving seat 26, and the guiding surface is directly formed by precision grinding to reduce assembly errors and improve overall rigidity. The above-mentioned alternative solutions do not change the functional nature of limiting the moving direction of the mounting seat to a longitudinal straight line and preventing it from rotating with the threaded rod, and belong to the reasonable extension within the technical concept of the present disclosure.

[0027] In some embodiments of the present disclosure, the side wall of the mounting seat 38 is fixedly installed with a clamping plate 311, the probe body 4 cooperates with the clamping plate 311, and the clamping assembly 5 is correspondingly arranged with the clamping plate 311.

[0028] The clamping plate 311 refers to a rigid metal plate structure fixedly installed on the side wall of the mounting seat 38, used as an action surface for the clamping assembly 5 to apply clamping force. The shape of the clamping plate 311 is rectangular, L-shaped or special-shaped structure with positioning bosses.

[0029] The probe body 4 cooperates with the clamping plate 311, which means that the side surface or special mounting lug of the probe body 4 is arranged adjacent to the clamping plate 311 in space position, and there is no relative motion freedom degree between them. This cooperative relationship is direct contact type cooperation, or indirect rigid connection through intermediate connecting piece. When the probe body 4 is a flat plate structure, the clamping plate 311 is symmetrically arranged at the middle of the side edge. When the probe body 4 has a protruding interface module, the clamping plate 311 avoids the module and is arranged in the adjacent flat area.

[0030] The clamping assembly 5 is correspondingly arranged with the clamping plate 311, which means that the spatial position of the execution end of the clamping assembly 5 is arranged opposite to the clamping surface of the clamping plate 311. The clamping assembly 5 is a normally closed mechanical self-locking structure, or an electrically controlled driving structure, whose driving mode includes electric push rod, pneumatic cylinder, hydraulic cylinder or electromagnet. The clamping assembly 5 is installed on the rear inner wall of the mounting shell 1, and its installation position is adaptively adjusted according to the actual position of the clamping plate 311 on the longitudinal adjusting assembly 3. When the clamping plate 311 is located on the right side of the mounting seat 38, the clamping assembly 5 is arranged on the right inner wall of the mounting shell 1.

[0031] In some embodiments of the present disclosure, the clamping assembly 5 is one of electromagnetic chuck type, pneumatic wedge type or electric screw locking type mechanism, whose fixed end is rigidly installed on the rear inner wall of the mounting shell 1, and the execution end is arranged towards the clamping plate 311. The execution end of the clamping assembly 5 is arranged opposite to the clamping plate 311 in space position, and the contact surfaces of the two are complementary in shape.

[0032] In some embodiments of the present disclosure, the clamping assembly 5 is mounted on the rear inner wall of the mounting shell 1, and its execution end cooperates with the clamped plate 311 to lock the position of the longitudinal adjustment assembly 3.

[0033] The clamping assembly 5 is a mechanical clamping device fixedly mounted on the rear inner wall of the mounting shell 1, and its execution end is a pneumatic clamping jaw, a symmetrical clamping arm driven by an electric push rod, an electromagnetic attraction type locking mechanism, or a wedge-shaped pressing block driven by a hydraulic cylinder.

[0034] The mounting position of the clamping assembly 5 is near the middle or symmetrically upper and lower area of the movement envelope of the longitudinal adjustment assembly 3 on the rear inner wall of the mounting shell 1, and its axis direction is perpendicular or inclined at an acute angle to the plane where the clamped plate 311 is located, to ensure that the clamping force can be effectively transmitted to the rigid main body structure of the longitudinal adjustment assembly 3. The mounting method is bolt fastening, welding embedding or guide rail quick release connection. The clamped plate 311 is a metal reinforcing plate fixedly mounted on the side wall of the mounting seat 38, and the side surface thereof facing the clamping assembly 5 is a plane, a rough surface with anti-skid lines or is provided with a positioning groove / protrusion, for forming reliable contact with the execution end of the clamping assembly 5 and preventing relative slipping. The clamped plate 311 is fastened with the mounting seat 38 by means of countersunk head screws, and a lock washer or thread glue is arranged to ensure the connection reliability in a long-term vibration environment. When the longitudinal adjustment assembly 3 completes the transverse and longitudinal positioning, the control system outputs an electric signal or a gas pressure signal to drive the clamping assembly 5 to act, so that its execution end moves along the preset direction and contacts the clamped plate 311, and a controllable positive pressure is applied. The positive pressure is transmitted to the mounting seat 38 through the clamped plate 311, and then the entire longitudinal adjustment assembly 3 is constrained in X, Y and Z directions, especially the small rotation around the X and Y axes and the axial movement along the Z axis, so as to realize the rigid locking of the spatial pose of the detector body 4.

[0035] Through the technical scheme, the following synergistic effects are realized: the mounting shell 1 and the mounting plate 11 form a stable reference platform, the through opening 12 provides an interference-free passing path for the transverse movement component, the transverse adjustment assembly 2 converts the rotary motion of the servo motor 21 into high-repetition linear displacement of the moving seat 26 through the toothed belt 25 and the toothed plate 29, drives the entire longitudinal adjustment assembly 3 and the detector body 4 to be accurately positioned in the X direction, the longitudinal adjustment assembly 3 uses the coupling mechanism of the screw structure and the linear guide structure to forcibly convert the rotary motion of the servo motor 34 into non-rotating lifting motion of the mounting seat 38 and the detector body 4 in the Z direction, the clamping assembly 5 applies a controllable clamping force to the clamped plate 311 after adjustment is completed, rigidly anchors the longitudinal adjustment assembly 3 to the mounting shell 1, thereby suppressing the micro-shaking and drifting of the detector body 4 due to vibration excitation in the vehicle driving state, the whole mechanism forms a closed-loop controllable adjustment capability in two orthogonal directions, and has a state locking function after adjustment, which solves the technical problem that the image quality is deteriorated due to the dynamic deviation of the detector in the vehicle-mounted environment, and improves the imaging robustness and operation efficiency of the CT system in the mobile working condition.

[0036] Those skilled in the art can adjust the shape, size, material, mounting position and cooperation relationship of each component of the present disclosure under the inspiration of the technical scheme of the present disclosure, which all fall within the protection scope of the present disclosure.

[0037] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A detector adjustment mechanism, comprising a mounting housing (1), characterized in that: An installation plate (11) is fixedly installed in the mounting opening on the rear wall of the mounting housing (1). The mounting plate (11) has a through opening (12) on its front side. A horizontal adjustment component (2) is fixedly installed on the front side of the mounting plate (11). A vertical adjustment component (3) is fixedly installed on the horizontal adjustment component (2). A detector body (4) is fixedly installed on the front side of the vertical adjustment component (3). A clamping component (5) is fixedly installed on the rear inner wall of the mounting housing (1). The clamping component (5) cooperates with the vertical adjustment component (3).

2. The detector adjustment mechanism according to claim 1, characterized in that, The lateral adjustment assembly (2) includes a servo motor (21) and a bearing housing (22) fixedly installed on the front of the mounting plate (11). The output end of the servo motor (21) passes through the through-hole (12) and is fixedly installed with a main gear (23). A driven gear (24) is rotatably installed on the rear side of the bearing housing (22). A toothed belt (25) meshes with the outer periphery of the main gear (23) and the driven gear (24).

3. The detector adjustment mechanism according to claim 2, characterized in that, The lateral adjustment assembly (2) also includes a movable seat (26), on the rear side of which two parallel sliders (27) are fixedly installed. On the front side of the mounting plate (11) two parallel slide rails (28) are fixedly installed. The sliders (27) are slidably connected to the slide rails (28). A toothed plate (29) is fixedly installed on the rear side of the movable seat (26). The toothed plate (29) passes through the through-hole (12) and engages with the toothed belt (25).

4. The detector adjustment mechanism according to claim 1, characterized in that, The longitudinal adjustment assembly (3) includes an upper connecting plate (31) and a lower connecting plate (32) that are fixedly installed on the upper and lower sides of the front of the movable seat (26), respectively. A threaded rod (33) is rotatably installed between the upper connecting plate (31) and the lower connecting plate (32).

5. The detector adjustment mechanism according to claim 4, characterized in that, A servo motor 2 (34) is fixedly installed at the bottom of the upper connecting plate (31). The output end of the servo motor 2 (34) passes through the upper connecting plate (31) and extends above the upper connecting plate (31), and is fixedly connected to the main gear 2 (35). The top end of the threaded rod (33) passes through the upper connecting plate (31) and extends above the upper connecting plate (31), and is fixedly connected to the driven gear 2 (36). The driven gear 2 (36) and the main gear 2 (35) are meshed together and fitted with a toothed belt 2 (37).

6. The detector adjustment mechanism according to claim 4, characterized in that, The longitudinal adjustment assembly (3) also includes a mounting base (38). The detector body (4) is fixedly mounted on the front of the mounting base (38). The mounting base (38) is sleeved around the threaded rod (33) and threadedly connected to the threaded rod (33). A slider two (39) is fixedly mounted on the bottom of the mounting base (38). A slide rail two (310) is fixedly mounted on the front of the movable base (26). The slider two (39) and the slide rail two (310) are slidably connected.

7. The detector adjustment mechanism according to claim 6, characterized in that, The mounting base (38) has a clamping plate (311) fixedly installed on its side wall. The detector body (4) cooperates with the clamping plate (311), and the clamping assembly (5) is correspondingly arranged with the clamping plate (311).

8. The detector adjustment mechanism according to claim 1, characterized in that, The opening (12) is a long strip structure used to avoid the lateral movement of the toothed plate (29) and the through-mounting of the output end of the servo motor (21).

9. The detector adjustment mechanism according to claim 3, characterized in that, The slide rail (28) and the slider (27) form a high-precision linear guide structure, which is used to limit the movement direction of the moving seat (26) to a horizontal straight line.

10. The detector adjustment mechanism according to claim 6, characterized in that, The slide rail 2 (310) and the slider 2 (39) constitute a high-precision linear guide structure, which is used to limit the movement direction of the mounting seat (38) to a longitudinal straight line and prevent the mounting seat (38) from rotating with the threaded rod (33).

11. The detector adjustment mechanism according to claim 2, characterized in that, The main gear (23), the driven gear (24), and the toothed belt (25) constitute a closed-loop synchronous toothed belt drive system for transmitting the rotational motion of the servo motor (21).

12. The detector adjustment mechanism according to claim 5, characterized in that, The main gear 2 (35), the driven gear 2 (36) and the toothed belt 2 (37) form a synchronous transmission structure, which is used to transmit the rotational motion of the servo motor 2 (34) to the threaded rod (33).

13. The detector adjustment mechanism according to claim 2, characterized in that, The servo motor (21) and bearing housing (22) are symmetrically distributed on the front of the mounting plate (11) to ensure uniform tension of the toothed belt (25).

14. The detector adjustment mechanism according to claim 1, characterized in that, The clamping assembly (5) is installed on the inner wall of the rear side of the mounting shell (1), and its actuating end cooperates with the clamping plate (311) to lock the position of the longitudinal adjustment assembly (3).

15. The detector adjustment mechanism according to claim 6, characterized in that, The detector body (4) is fixed to the front of the mounting base (38) by bolts, and the horizontal and vertical positions are adjusted synchronously with the mounting base (38).

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