Portable spine measurement instrument based on MIMU and method

Abstract

The invention discloses a portable spine measurement instrument based on an MIMU. The instrument is characterized by comprising a handheld intelligent terminal, the handheld intelligent terminal achieves a spine gesture measurement function and mainly comprises an MIMU data collection unit and a data preprocessing and gesture calculation unit, and the MIMU data collection unit collects acceleration, angular speed and temperature data of the measurement instrument in the process of moving on the spine through a triaxial accelerometer, a triaxial gyroscope and a thermometer and transmits the acceleration, angular speed and temperature data to the data preprocessing and gesture calculation unit; the data preprocessing and gesture calculation unit conducts temperature drift compensation firstly, then adopts a processing algorithm of time sequence analysis and strong tracking Kalman filtering for estimating the null point deviation of the angular speed and the acceleration, conducts data null point deviation compensation, and finally calculates the spine gesture according to acceleration and angular speed data after compensation. The spine measurement instrument is easy to operate, thethree dimensional angle can be dynamically and immediately measured at high speed, the gesture of each vertebral column and each spine is measured in real time, and the measurement precise is higher.

Description

technical field [0001] The patent of the present invention discloses a portable spine measurement instrument based on MIMU, which belongs to the technical field of medical devices. Background technique [0002] In the process of outpatient diagnosis, the spine surgeon needs to obtain the cobb angle of the patient with scoliosis. When measuring the cobb angle, it is necessary to use multiple auxiliary lines on the X-ray film, measure the included angle with a protractor, and calculate its supplementary angle The final result is the cobb angle. In the process of measuring the cobb angle of the spine, various medical instruments are required, but it is easy to cause human errors during the measurement process, which is cumbersome to use and has low reliability. However, the special instruments for the measurement of the spine are not easy to carry. The disadvantages of bulkiness and high cost of use. [0003] At present, electronic spine measurement instruments, such as the S...

AI Technical Summary

Problems solved by technology

In the process of measuring the cobb angle of the spine, various medical instruments are required, but it is easy to cause human errors during the measurement process, which is cumbersome to use and has low reliability. However, the special instruments for the measurement of the spine are not easy to carry. Disadvantages of bulkiness and high cost of use

[0003] At present, electronic spine measurement instruments, such as the Swiss Idiag SpinalMouse and Israel's SpineScanTM, have the same measurement principle, based on the measurement of the earth's inclination, that is, the three-dimensional electronic gravity angle sensing technology; because the measurement angle is based on the three axes of gravity The above calculation will definitely be affected by the accuracy of gravity extraction; since only one angle can be measured at a time, other modes must be designed to measure other angles, resulting in cumbersome measurement operations; The jitter error; there is also a spine electronic measuring instrument whose core measurement sensor uses a resistive strain gauge or a strain gauge, and the strain is used to measure stress changes, generally small changes are measured, and the spine may change at a large angle, so in the measurement principle There may be some problems; in addition, since these spine measuring instruments are composed of a host, a computer, and a printer, they cannot be portable

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