Micro skeleton two-dimensional force sensor and skeleton two-dimensional force sensing device

Abstract

The invention discloses a micro skeleton two-dimensional force sensor and a skeleton two-dimensional force sensing device. The two-dimensional force sensor comprises a mechanical sensitive element, a hard centre, a strain gauge and a measurement circuit. The mechanical sensitive element is used for completing measurement on a skeleton two-dimensional force, namely realizing the measurement on axial tension and a radial shear force; the hard centre is positioned in the centre of the mechanical sensitive element for bearing and transmitting an external force; the strain gauge is attached to theupper surface of the mechanical sensitive element; and the measurement circuit converts and amplifies a signal. The skeleton two-dimensional force sensor designed by the invention can realize the measurement on the axial tension and the radial shear force on the fracture trauma section by matching an external skeletal fixation device. The mechanical sensitive element has an E-type circular diaphragm structure, and has the advantages of small size, high sensitivity and good linearity. The mechanical sensitive element with the simple structure particularly can be molded at one time into a whole, so that the rigidity is good, the cost is low and the dynamic performance is good.

Description

technical field [0001] The invention belongs to the technical field of sensors, and relates to a bone two-dimensional force sensor, in particular to a miniature bone two-dimensional force sensor. Background technique [0002] The stress on the bone trauma section directly affects the speed and quality of bone healing. When the stress on the bone trauma section is too large, it will lead to bone cell necrosis at the bone trauma section, delayed union of fractures, or even nonunion. If the stress is too small, the trauma section will Can not reach a certain level of stress stimulation and the role of stable fixation. At present, the fixers of various structures used in the clinical treatment of fractures at home and abroad can apply force to the fracture end, but the magnitude and direction of the force applied to the fracture trauma section cannot be known. The negative impact of the compression modality on the speed and quality of fracture healing is evident. In order to c...

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Problems solved by technology

In addition, none of the existing force measurement sensor products can be applied to the measurement of the stress of the bone trauma section. The main reasons are as follows: first, the large volume leads to a large space occupied, and the clinical operation is inconvenient or even impossible to operate; There is no protective device, which makes the reliability of sensor detection not high, and it is difficult to adapt to the special requirements of clinical medicine; the third is that it is heavy and inconvenient for patients to move

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