There are several different technical principles used in gait analysis, including:

1. Motion capture systems:
   Using multiple cameras and sensors to capture three-dimensional position and posture data of human movement, analyzing gait features and abnormalities. moden technology enable a single depthsensor camera to capture necessary three-dimensional position and posture, it is convenient and easy to use.
   
2. Pressure-sensitive floors:
   Placing pressure sensors on the floor to measure foot pressure distribution at different parts, analyzing gait features and abnormalities. Some more information may be provided such as shear force. This is widely used in research laboratory in Taiwan.
   
3. Accelerometers and gyroscopes(wearable):
   Measuring body motion acceleration and angular velocity by placing sensors such as accelerometers and gyroscopes at different body parts, analyzing gait features and abnormalities. It takes some time and experience in installation. Some patient might be fatigue during the process, under the condition of have full body information.
   
4. Electromyography (EMG): Measuring the electrical signals of muscle contraction and relaxation by placing electrodes on the muscle, analyzing gait features and abnormalities.
   
5. Single RGB camera:
   Using a regular 2D camera, such as those found on mobile phones, and the latest computer vision AI algorithms to analyze posture. By assigning distances in the real world and deducing the possible distance from the camera via the ratio between selected joint distances, gait features and abnormalities can be analyzed. This method is low-cost and convenient, but may have limitations in accurately measuring gait parameters due to the lack of concrete 3D information.

Each method has its advantages and disadvantages. For example, motion capture systems are considered the most accurate method for measuring gait, but they are expensive and require specialized equipment and trained personnel. Pressure-sensitive floors are more affordable but have limited portability and may not be suitable for outdoor use. Accelerometers and gyroscopes are relatively low-cost and portable but have limitations in measuring gait abnormalities. EMG can provide information about muscle activity, but it requires placing electrodes on the skin, which can be uncomfortable for some people. Infrared sensors are non-intrusive and easy to use but have limitations in measuring certain gait parameters.

Overall, the choice of method depends on the specific requirements of the gait analysis application and the trade-offs between accuracy, cost, portability, and ease of use.

In conclusion, gait analysis is an important tool in assessing and managing gait abnormalities and related conditions. There are various technical principles used in gait analysis, each with its own advantages and limitations. The choice of method depends on the specific needs of the application and the trade-offs between accuracy, cost, portability, and ease of use.

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With our expertise and commitment to innovation, LongGood MediTech is poised to lead the way in digital rehabilitation and gait analysis. Contact us today to learn more about our products and services.