Femoral stem detection device

Abstract

The utility model relates to the field of femoral stem detection, and specifically discloses a femoral stem detection device, which solves the problems in the prior art of cumbersome operation, low detection efficiency, and limited detection regionality, resulting in inaccurate detection results. The device includes a storage rack, a detection rack, a classification rack, a collection box, a data acquisition module, and a processing module. The inner wall of the detection rack has a plurality of laser displacement sensors connected to the data acquisition module, and the data acquisition module is communicatively connected to the processing module; the storage rack is connected to the detection rack, and is provided with a plurality of positioning grooves, and the femoral stem can be embedded in the plurality of positioning grooves. The classification rack is connected to the storage rack, and the classification rack is used to classify the detected femoral stems and place them in the corresponding collection boxes. The device is convenient for quickly and accurately placing a plurality of femoral stems in the same position at a designated position, and automatically transporting, detecting, and classifying, and the processes of placement, detection, and classification can be carried out simultaneously, with simple operation, high detection efficiency, and more accurate results.

Description

Technical Field

[0001] The utility model relates to the technical field of femoral stem detection, in particular to a femoral stem detection device. Background Art

[0002] The curvature of the femoral stem is one of the key factors affecting the matching of the artificial hip prosthesis with the patient's femoral anatomical structure. By testing the curvature of the femoral stem, a femoral stem that can form a good match between the artificial hip prosthesis and the patient's femoral anatomical structure can be selected. At present, the existing detection methods mostly rely on manual measurement tools or traditional optical detection equipment, which have problems such as insufficient accuracy, low efficiency and difficulty in adapting to complex shapes.

[0003] After searching, the Chinese patent with the publication number CN218297012U in the prior art discloses an artificial femoral stem curvature detection tool, and its disclosure content includes: comprising a base, a base plate is provided on the base, a positioning block is provided on the base plate, a femoral stem can be placed on the positioning block, a clamping device is provided above the positioning block, and the clamping device can clamp the femoral stem on the positioning block; a mobile detection device and a fixed detection device are respectively provided on the left and right sides of the positioning block. Both the mobile detection device and the fixed detection device include a dial indicator, and the mobile detection device and the fixed detection device are respectively located at the bottom of both ends of the femoral stem placed on the positioning block, and the mobile detection device can move along the length direction of the femoral stem.

[0004] According to the contents disclosed in the above-mentioned prior art, this kind of artificial femoral stem curvature detection tool has the following shortcomings: first, the placement of the femoral stem requires controlling the clamping device to press the femoral stem onto the positioning block, and then operating the mobile detection device to perform the detection. Not only is the operation cumbersome, but the detection area is limited, and the detection result is not accurate enough; secondly, each time the detection is performed, the entire process can only be completed before the next operation can be carried out, which is inefficient.

[0005] To this end, the present application provides a femoral stem detection device to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to solve the above-mentioned problems raised in the background technology and provides a femoral stem detection device.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A femoral stem detection device comprises a storage rack, a detection rack, a classification rack, a collection box, a data acquisition module and a processing module, wherein a plurality of laser displacement sensors are distributed on the inner wall of the detection rack, the plurality of laser displacement sensors are communicatively connected to the data acquisition module, and the data acquisition module is communicatively connected to the processing module;

[0009] The storage rack is movably connected to the detection rack, and a plurality of positioning grooves are provided on the storage rack. The femoral stem is placed on the storage rack through the plurality of positioning grooves. The classification rack is movably connected to the storage rack, and the femoral stem is classified and placed in the corresponding collection box according to whether the artificial hip joint prosthesis can form a good match with the patient's femoral anatomical structure.

[0010] Furthermore, the detection frame is a cylindrical structure with openings at both ends, and a plurality of the laser displacement sensors are distributed along the axial direction and circumferential direction of the detection frame.

[0011] Furthermore, a slide groove is provided on the inner wall of the detection frame for the storage rack to move, a rack is provided on one side of the storage rack, the rack is meshed with a gear, the gear is rotatably connected to the detection frame, the gear shaft is connected to a first motor, and the first motor is fixedly connected to the detection frame.

[0012] Furthermore, the storage rack is a hollow structure and is provided with two groups of positioning grooves, and each group of positioning grooves is correspondingly provided with a classification rack.

[0013] Furthermore, the classification rack includes two relatively arranged rotating shafts, both rotating shafts are rotatably connected to the storage rack, both rotating shafts are connected to a second motor, the second motor is fixedly connected to the storage rack, and both rotating shafts are fixedly connected to a lifting plate.

[0014] Furthermore, the lifting plate is a thin plate structure made of hard rubber, and the lifting plate has a curved conveying surface.

[0015] Furthermore, collection boxes are provided at both ends of the detection frame.

[0016] Furthermore, the collection box has an arc-shaped buffer surface close to the classification rack.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model sets the storage rack as a hollow structure and designs a plurality of positioning grooves, so as to ensure that each femoral stem to be tested can be quickly and accurately placed in the designated position in the same position, and at the same time facilitates the full exposure of the tested part of the femoral stem to be tested, which is conducive to improving the detection efficiency and accuracy, and the detection operation is simple;

[0019] 2. In the utility model, the gear is rotated by the operation of the first motor, and the gear transmission rack moves, which further drives the storage rack to move into the detection frame. At this time, multiple high-precision laser displacement sensors distributed along the axial and circumferential directions of the detection frame can measure the distance between each position on the surface of the femoral stem and the sensor in all directions, and obtain the curvature data of the femoral stem. The data acquisition module receives the measurement data of the laser displacement sensor, and feeds it back to the processing module after preliminary processing; the processing module adopts an embedded computer system and has a built-in special algorithm. It can quickly calculate the curvature of the femoral stem based on the data information fed back after preliminary processing by the data acquisition module, and compare and analyze the calculated curvature value with the standard curvature value, so as to accurately determine whether the femoral stem can make the artificial hip joint prosthesis form a good match with the patient's femoral anatomical structure;

[0020] 3. The utility model provides two groups of classification racks, and each group has a corresponding collection box, which are respectively used to classify femoral stems that can and cannot make the artificial hip joint prosthesis form a good match with the patient's femoral anatomical structure. After the processing module performs data processing, it analyzes whether the femoral stem can make the artificial hip joint prosthesis form a good match with the patient's femoral anatomical structure. Then, under the drive of the first motor, the storage rack transports the femoral stem out of the detection rack. If it can, the second motor of the classification rack on one side of the femoral stem that can form a good match is collected and driven to rotate, and further drive the lifting plate to rotate, so as to take the femoral stem out of the positioning groove. Under the action of its own gravity, the femoral stem slides along the conveying surface of the lifting plate into the collection box. By setting an arc-shaped conveying surface, the femoral stem slides directly into the collection box without colliding with the storage rack. At the same time, the collection box has an arc-shaped buffer surface to reduce the impact of the femoral stem during the falling process and avoid its damage.

[0021] 4. The utility model sets two groups of positioning grooves. When the first femoral stem enters the detection frame for detection, the other group of racks is in an idle state, and the second femoral stem to be detected can be placed for detection; when the detection of the first femoral stem is completed, the first femoral stem is sent out from the other end of the detection frame for classification while the second femoral stem is sent into the detection frame for detection. After the first femoral stem is classified, the corresponding positioning groove can continue to place the third femoral stem, and this cycle is repeated, which can effectively improve the detection efficiency of the femoral stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the femoral stem in the detection process in Example 1 of the utility model;

[0023] Figure 2 This is a top view of the femoral stem in the detection process in Example 1 of the utility model

[0024] Figure 3It is a schematic diagram of the femoral stem in the classification process in Example 1 of the utility model;

[0025] Figure 4 is a top view of the femoral stem in the classification process in Example 1 of the utility model;

[0026] Figure 5 This is a front view of the femoral stem in the classification process in Example 1 of the utility model;

[0027] Figure 6 It is a schematic diagram of the overall structure of Example 2 of the utility model;

[0028] Figure 7 It is a top view of Example 2 of the utility model;

[0029] Figure 8 This is the front view (moving direction of the storage rack) in Example 2 of the present utility model.

[0030] Reference numerals in the above drawings:

[0031] 1. Storage rack; 11. Positioning slot; 12. Rack; 2. Detection rack; 21. Slide slot; 3. Classification rack; 31. Rotating shaft; 32. Second motor; 33. Lifting plate; 331. Conveying surface; 4. Collection box; 41. Buffer surface; 5. Laser displacement sensor; 6. Gear; 7. First motor; 8. Femoral stem. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0034] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Example 1: Reference Figure 1-Figure 5As shown, the femoral stem detection device provided by the present embodiment includes a storage rack 1, a detection rack 2, a classification rack 3, a collection box 4, a data acquisition module and a processing module. The data acquisition module adopts a development board based on an ARM Cortex-M4 processor (such as the STM32F7 series); equipped with a high-speed ADC (analog-to-digital converter) and an SPI / I2C communication interface. The processing module adopts an embedded computer system, and the hardware adopts Raspberry Pi 4B (Raspberry Pi4B); the operating system is Raspbian (a Linux system based on Debian); and the built-in algorithm is a curvature calculation and comparative analysis algorithm developed in Python.

[0036] In this embodiment, the structural components of the femoral stem detection device are designed and implemented as follows: the detection frame 2 is a cylindrical structure with openings at both ends, and a plurality of high-precision laser displacement sensors 5 are distributed along the axial and circumferential directions on the inner wall of the detection frame 2, wherein the model of the laser displacement sensor 5 is Keyence LJ-V7080 (laser triangulation sensor), and its measurement range is 0-50mm; the resolution is 0.1μm; and the sampling frequency is 10kHz. In this embodiment, the plurality of laser displacement sensors 5 are communicatively connected to the data acquisition module, and the data acquisition module is communicatively connected to the processing module.

[0037] In addition, the rack 1 in this embodiment is movably connected to the detection rack 2, and a slide groove 21 for the rack 1 to move is installed on the inner wall of the detection rack 2. A rack 12 is installed on one side of the rack 1, and the rack 12 is meshed with a gear 6. The gear 6 is rotatably connected to the detection rack 2. The gear 6 shaft is connected to the output end of the first motor 7, and the main body of the first motor 7 is also fixedly installed on the detection rack 2. Among them, the rack 1 is designed as a hollow structure, and a plurality of positioning grooves 11 are installed on the rack 1. During use, the femoral stem 8 is limited and placed on the rack 1 through the plurality of positioning grooves 11.

[0038] In addition, the classification rack 3 in the present embodiment is movably connected to the storage rack 1. The classification rack 3 is used to classify the femoral stems 8 and place them in the corresponding collection boxes 4 according to whether a good matching detection result can be formed. The collection box 4 has an arc-shaped buffer surface 41 close to the classification rack 3. The arc-shaped buffer surface 41 is used to reduce the impact of the femoral stem 8 during the falling process to avoid damage. The classification rack 3 includes two relatively arranged rotating shafts 31. Both rotating shafts 31 can be rotatably connected to the storage rack 1. One end of the two rotating shafts 31 is respectively connected to the output ends of two second motors 32. The two second motors 32 are fixedly installed on the storage rack 1. Both rotating shafts 31 are fixedly connected to a lifting plate 33. The lifting plate 33 is a thin plate structure made of hard rubber. The lifting plate 33 has a curved conveying surface 331.

[0039] The working principle of this embodiment is summarized as follows:

[0040] Before the test, the rack 1 is outside the test rack 2, and the femoral stem 8 to be tested is placed on the rack 1. Since the rack 1 is a hollow structure and is designed with multiple positioning grooves 11, it can ensure that each femoral stem 8 can be quickly and accurately placed at the designated position in the same position, and at the same time, the part of the femoral stem 8 to be tested is fully exposed, which is conducive to improving the detection efficiency and accuracy;

[0041] After the femoral stem 8 to be tested is placed, the first motor 7 is started to drive the gear 6 to rotate, and the gear 6 transmission rack 12 moves, further driving the rack 1 to move into the detection frame 2. At this time, multiple high-precision laser displacement sensors 5 begin to scan the surface of the femoral stem 8 and collect displacement data at a frequency of 10kHz; the data acquisition module receives the analog signal of the laser displacement sensor 5, removes noise through a built-in filtering algorithm, and converts the data into a digital signal, which is packaged and sent to the embedded computer system through the serial port; the embedded computer system receives the data packet sent by the data acquisition module, parses and extracts the displacement data; the above displacement data is processed by the implanted Python algorithm, the contour curve of the femoral stem is extracted, and the curvature value of the femoral stem is calculated according to the contour curve, and then the least squares method is used to fit the curve to calculate the curvature radius as a quantitative indicator of the curvature;

[0042] Then, the calculated femoral stem curvature value is compared and analyzed with the standard curvature data; an allowable error range is set (such as ±0.5mm). If the deviation between the actual curvature and the standard curvature is within this range, the curvature is judged to be up to standard, and the artificial hip prosthesis can form a good match with the patient's femoral anatomical structure; otherwise, the curvature is judged to be substandard, and the artificial hip prosthesis cannot form a good match with the patient's femoral anatomical structure.

[0043] Then, two groups of classification racks 3 are designed, and each group of classification racks 3 has a corresponding collection box 4, which are respectively used to classify the femoral stems 8 that can make the artificial hip joint prosthesis form a good match with the patient's femoral anatomical structure and the femoral stems 8 that cannot make the artificial hip joint prosthesis form a good match with the patient's femoral anatomical structure. After the processing module performs data processing, first, under the drive of the first motor 7, the rack 1 transports the femoral stem 8 out of the detection rack 2. If the femoral stem 8 can make the artificial hip joint prosthesis form a good match with the patient's femoral anatomical structure, then The second motor 32 of the classification rack 3 on the corresponding side runs and drives the rotating shaft 31 to rotate, further driving the lifting plate 33 to rotate, and taking the femoral stem 8 out of the positioning groove 11. Under the action of its own gravity, the femoral stem 8 slides along the conveying surface 331 of the lifting plate 33 to the collecting box 4. By setting the arc-shaped conveying surface 331, the femoral stem 8 can slide directly into the collecting box 4 without colliding with the storage rack 1. At the same time, the collecting box 4 has an arc-shaped buffer surface 41, which can reduce the impact of the femoral stem 8 during the falling process and avoid it from being damaged.

[0044] Example 2: Reference Figure 6-Figure 8 As shown, a femoral stem detection device is provided in the scheme of the present embodiment 2, which differs from the embodiment 1 in that only two groups of positioning grooves 11 are designed on the storage rack 1 in the present embodiment, and each group of positioning grooves 11 is correspondingly provided with a classification rack 3, and collection boxes 4 are placed at both ends of the detection rack 2, and the placement position of the collection box 4 is based on the femoral stem 8 being able to fall on the buffer surface 41 after sliding off the classification rack 3.

[0045] The working principle of this embodiment is summarized as follows:

[0046] By setting up two groups of positioning grooves 11, when the first femoral stem 8 to be tested enters the detection frame 2 for testing, the other group of storage racks 1 is in an idle state, and the second femoral stem 8 to be tested can be placed for testing; when the first femoral stem 8 is tested, the first femoral stem 8 is sent out from the other end of the detection frame 2 for classification, and the second femoral stem 8 is sent into the detection frame 2 for testing. After the first femoral stem 8 is classified, the corresponding positioning groove 11 can continue to place the third femoral stem 8, and this cycle is repeated, which can effectively improve the detection efficiency of the femoral stem 8.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A femoral stem detection device, comprising a storage rack (1), a detection rack (2), a classification rack (3), a collection box (4), a data acquisition module and a processing module, characterized in that: A plurality of laser displacement sensors (5) are distributed on the inner wall of the detection frame (2), the plurality of laser displacement sensors (5) are communicatively connected to the data acquisition module, and the data acquisition module is communicatively connected to the processing module; The storage rack (1) is movably connected to the detection rack (2); a plurality of positioning grooves (11) are provided on the storage rack (1); the plurality of positioning grooves (11) are used to limit the placement of the femoral stem (8) on the storage rack (1); the classification rack (3) is movably connected to the storage rack (1); the femoral stem (8) is classified and placed in a corresponding collection box (4) through the classification rack (3) according to whether the artificial hip joint prosthesis can form a good match with the patient's femoral anatomical structure.

2. A femoral stem detection device according to claim 1, characterized in that: The detection frame (2) is a cylindrical structure with openings at both ends, and a plurality of the laser displacement sensors (5) are distributed along the axial direction and circumferential direction of the detection frame (2).

3. A femoral stem detection device according to claim 1, characterized in that: The inner wall of the detection frame (2) is provided with a slide groove (21) for the storage rack (1) to move, and one side of the storage rack (1) is provided with a rack (12), the rack (12) is meshed with a gear (6), the gear (6) is rotatably connected to the detection frame (2), the gear (6) shaft is connected to a first motor (7), and the first motor (7) is fixedly connected to the detection frame (2).

4. A femoral stem detection device according to claim 1, characterized in that: The storage rack (1) is a hollow structure and is provided with two groups of positioning grooves (11), and each group of positioning grooves (11) is provided with a corresponding classification rack (3).

5. A femoral stem detection device according to claim 1, characterized in that: The classification rack (3) comprises two rotating shafts (31) arranged opposite to each other, the two rotating shafts (31) being rotatably connected to the storage rack (1), the two rotating shafts (31) being connected to a second motor (32), the second motor (32) being fixedly connected to the storage rack (1), and the two rotating shafts (31) being fixedly connected to a lifting plate (33).

6. A femoral stem detection device according to claim 5, characterized in that: The lifting plate (33) is a thin plate structure made of hard rubber, and the lifting plate (33) has an arc-shaped conveying surface (331).

7. A femoral stem detection device according to claim 1, characterized in that: Collection boxes (4) are provided at both ends of the detection frame (2).

8. A femoral stem detection device according to claim 7, characterized in that: The collection box (4) has an arc-shaped buffer surface (41) close to the classification rack (3).

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