33 results about "Balance assessment" patented technology

A wind tunnel test balance assessment method based on acceleration signal approximate entropies mainly includes the steps that a model three-dimensional acceleration sensor, a framework three-dimensional acceleration sensor and a balance three-dimensional acceleration sensor are installed on the inner wall of the top end of an aircraft model, a framework model and a balance respectively; Fourier transformation is carried out on acceleration signals measured out by the three acceleration sensors in different directions, then a frequency spectrum signal is obtained, approximate entropy characteristic values of six frequency bands within 0-300 Hz are calculated out, the difference value between the approximate entropy characteristic values of the acceleration signals in the same direction of the model and the framework is calculated out, and the difference value between the approximate entropy characteristic values of the acceleration signals in the same direction of the model and the balance is calculated out; when the two difference values between the approximate entropy characteristic values in the different directions are within the specialized range, an assessment result determines that test data of the balance are credible, and when the two difference values are not within the specialized range, the assessment result determines that the test data of the balance are not credible. Consequently, model mechanical data measured out through the balance are accurate and reliable in a wind tunnel test, and more accurate and reliable test data are provided for aerospace aircrafts.

The invention discloses a lower limb rehabilitation device for weight loss walking training and balance assessment, which comprises a training platform, a walking training device set on the training platform for assisting patients in lower limb joint movement, and a walking training device set on the training platform for A weight-reducing support device for weight loss control and pelvic tilt control for patients who are performing lower limb joint movements, a posture conversion device installed on the top of the weight-reducing support device to assist patients in achieving sitting and standing posture conversion, and a weight-reducing support device The power output part of the device is used to cooperate with the patient to perform pelvic cooperative movement when the patient performs lower limb movement, and is used to feedback the movement data of the pelvis to facilitate the pelvic cooperative movement feedback device for balance evaluation. The invention assists the patient to obtain pelvic motion data while performing lower limb joint motion under the control of weight loss, which facilitates subsequent balance evaluation and autonomous adjustment of pelvic balance motion, and is beneficial to the synchronous improvement of the patient's walking ability and balance ability.

The invention discloses a multi-body position pressure balance evaluation system, which includes: a sensor array; a control unit, which collects multiple electrical signals from multiple pressure sensing points through a signal acquisition unit; and a processing unit, which collects multiple electrical signals according to multiple electrical signals After obtaining the pressure data, the processing unit preprocesses the pressure data and performs feature extraction, and performs feature selection on the balance evaluation data to obtain the evaluation data, and establishes a prediction model on this basis, and then obtains the limit value of the pressure evaluation according to the prediction model, The limit value is used for comparison with the collected pressure sensor array data of the patient, so as to obtain a quantitative evaluation result. The present invention can perform static balance assessment on multiple body positions such as sitting, standing, and lying down, and perform dynamic balance assessment on rehabilitation training exercises, etc., and provides quantified balance assessment results to realize automatic and efficient balance assessment. At the same time, based on daily life scenarios, interactive games for balance assessment scenarios are developed to enhance the enthusiasm of patients for rehabilitation training.