Office Chair Posture Detection
Office chair posture detection mainly includes detection methods for ordinary office chairs, smart sitting posture monitoring chairs, and detection methods under specific standards. Details are as follows:
The posture detection of ordinary office chairs is mainly based on fixed mechanical structures. Their design is usually based on static anthropometric data, such as seat depth, seat height, and backrest angle. This detection method provides support for the user's body in a specific posture but has significant limitations. Since it cannot adapt to dynamic changes in the human body's posture, such as the unconscious adjustment of the center of gravity every few minutes, it can only provide relatively fixed support and is difficult to meet the comfort needs of the human body in different states.
The detection method of smart sitting posture monitoring chairs is more advanced and precise. It uses pressure array sensors embedded in the seat cushion or backrest to capture the pressure distribution in various areas of the buttocks and back in real-time. When continuous high pressure is detected on one side, the system determines that the user has tilted to the side or leaned forward. The judgment is based on the rate and magnitude of pressure deviation. For example, when the pressure on the right ischial tuberosity node increases by more than 15% within 3 seconds, the system triggers a reminder. In addition, its built-in six-axis gyroscope and accelerometer can calculate the pelvic rotation angle and spinal scoliosis in real-time and transmit the data to a้ ๅฅ (matching) terminal via low-power Bluetooth, forming a "sitting posture heat map" on a minute-by-minute basis that shows the movement trajectory of the pressure center point over an hour. Users can use this to determine their habitual tendencies and adjust their sitting posture in a timely manner.
Posture detection under specific standards takes the EN 1335 standard as an example. This standard lists the mechanical balance characteristics of the entire chair when the seat back is adjusted to a forward-tilting angle as a separate evaluation item. In the test, a specified load is applied to the front edge area of the seat surface, and the direction of the force is not completely vertical downward but includes a forward horizontal component. The detection device accurately records whether the chair suddenly tips over or reaches an unstable critical point during the load increase process to evaluate the stability of the chair in a forward-tilting posture.
