Method for automatically finding bone nails and measuring external dimension of bone nails based on inherent characteristics of medical implantable bone nails

A technology with inherent characteristics and external dimensions, which is applied in the field of automatically finding and measuring the external dimensions of medical implantable bone nails based on the inherent characteristics. Large and other problems, to achieve the effect of high measurement efficiency

CN109540000AInactive Publication Date: 2019-03-29XIAMEN YINGHAODA PRECISION EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-03-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for automatically finding bone nails and measuring external dimension of the bone nails based on inherent characteristics of medical implantable bone nails. The methodcomprises the following steps of step 1: collecting images; and arbitrarily placing the bone nails in batches on a large-field image measuring instrument; step 2: automatically finding the bone nailsby using the inherent characteristics of the bone nails; and using the image binarization to process the collected images; step 3: automatically measuring the outer dimension for a single bone nail;and measuring the thread outer diameter, the small diameter, the head diameter, and the length data of the single bone nail; and step 4: measuring in batches; and executing step 2 while using multi-thread asynchronous, so that external dimensions of all the nails on the image can be quickly measured in batches. The method for automatically finding the bone nails and measuring the external dimension of the bone nails based on the inherent characteristics of the medical implantable bone nails quickly detects the outer dimensions of the medical implantable bone nails in batches, and can be applied to most medical bone nails to solve the technical problems existing in the prior art.
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Description

technical field

[0001] The invention relates to the technical field of medical implantable bone nails and the field of precision image measurement, in particular to a method for automatically finding and measuring the external dimensions of the medical implantable bone nails based on the inherent characteristics. Background technique

[0002] Medical implantable bone nails, also known as fracture fixation screws, are commonly used in clinical orthopedic implants for fixation. Medical implantable bone nails are usually used for the fixation of internal fractures or dislocations. They can be directly screwed into two different bone blocks or internal implants such as fixed bone plates to fix the fracture, position the bone and promote its healing.

[0003] The shape of medical implantable bone screws is similar to that of ordinary nails, and they are generally small in size. The lengths, thread diameters, and head diameters of bone screws vary. Because of the special use envi...

Examples

Embodiment

[0051] A technical solution is based on the inherent characteristics of medical implantable bone screws to automatically find and measure their external dimensions, which includes the following steps:

[0052] Step 1: Acquire an image. Batches and random placement of bone nails on the large-field image measuring instrument (attached figure 2 : Refers to the workbench consisting of a large field of view bi-telecentric lens 1-2, a high-resolution camera 1-1, a parallel light source 1-5, a workbench 1-4 and a fixing mechanism 1-3), and the computer collects images ( attached image 3 ).

[0053] Step 2: Use the inherent characteristics of the bone screw to automatically find the bone screw, and process the image binary.

[0054] Step 2.1: Carry out threshold segmentation, all pixels whose gray value is greater than the threshold may be the bone nail to be tested are represented by 0, and all pixels whose gray value is less than or equal to the threshold are blank areas and ar...