Large weight scale for detecting possibility of bedsore, and bedsore detecting method
Inventors
Assignees
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Publication Number
US-12613124-B2
Publication Date
2026-04-28
Expiration Date
Abstract
Provided is a large weight scale capable of weighing a to-be-weighed subject sitting in a wheelchair, including a rectangular weighing base on which the to-be-weighed subject gets on, weighing sensors disposed at four corners of the weighing base, and a control unit configured to perform arithmetic operations based on output values of the weighing sensors, wherein the large weight scale includes a bedsore detecting unit configured to detect and make a notification of the possibility of the to-be-weighed subject in a wheelchair developing a bedsore based on a first sum value of output values of a pair of the weighing sensors disposed on a left side of the weighing base, a second sum value of output values of a pair of the weighing sensors disposed on a right side of the weighing base, and a third sum value of output values of all of the weighing sensors.
Core Innovation
The invention provides a large weight scale configured to weigh a to-be-weighed subject sitting in a wheelchair, including a rectangular weighing base, weighing sensors disposed at four corners of the weighing base, and a control unit that performs arithmetic operations based on output values of the weighing sensors. The bedsore detecting unit detects and makes a notification of the possibility of the to-be-weighed subject in a wheelchair developing a bedsore.
The bedsore detecting unit computes a first sum value of output values of a pair of the weighing sensors disposed on a left side of the weighing base, a second sum value of output values of a pair of the weighing sensors disposed on a right side of the weighing base, and a third sum value of output values of all of the weighing sensors. The unit determines and notifies that there is the possibility of developing a bedsore when an absolute value of a ratio of a difference value between the first sum value and the second sum value to the third sum value exceeds a predetermined value.
The disclosure includes side-related determination of bedsore possibility, by specifying that notification can indicate left-side versus right-side possibility. The disclosure also includes determination related to whether the to-be-weighed subject is in a wheelchair.
Claims Coverage
The document provides two independent claims: a large weight scale claim and a bedsore detecting method claim. Across these independent claims, the inventive concept centers on side-based sensor sum arithmetic and a threshold comparison using an absolute value of a left-right difference ratio to a total sum, which triggers determining and notification of bedsore-development possibility.
Wheelchair large weight scale with four-corner sensors and bedsore detection
A large weight scale configured to weigh a to-be-weighed subject sitting in a wheelchair, comprising a rectangular weighing base, weighing sensors disposed at four corners of the weighing base, and a control unit configured to perform arithmetic operations based on output values of the weighing sensors, wherein a bedsore detecting unit is configured to detect and make a notification of the possibility of developing a bedsore based on a first sum value, a second sum value, and a third sum value, with notification triggered when an absolute value of a ratio of a difference value between the first sum value and the second sum value to the third sum value exceeds a predetermined value.
Bedsore detecting method using left/right/total sums from four-corner sensors
A bedsore detecting method for detecting the possibility of a to-be-weighed subject in a wheelchair developing a bedsore by using a large weight scale having weighing sensors disposed at four corners of a rectangular weighing base, wherein a first sum value, a second sum value, and a third sum value are calculated, and when an absolute value of a ratio of a difference value between the first sum value and the second sum value to the third sum value exceeds a predetermined value, it is determined and notified that there is the possibility of developing a bedsore.
Both independent claims apply the same core logic: calculate left-side sum, right-side sum, and total sum from four corner weighing sensors on a rectangular base for a subject sitting in a wheelchair, then notify bedsore-development possibility when the absolute value of a left-right difference ratio to the total sum exceeds a predetermined value.
Stated Advantages
Provides detection and notification of the possibility of a wheelchair-bound subject developing a bedsore.
Enables notification based on an absolute value of a ratio reflecting a difference between left-side and right-side sensor sums relative to a total sensor sum.
Allows side-specific indication of bedsore possibility (left or right) in dependent claim refinements.
Documented Applications
Used as a large weight scale for wheelchair users to detect and notify the possibility of developing a bedsore while the subject is sitting on the weighing base.
Used as a bedsore detecting method that determines and notifies bedsore-development possibility for a to-be-weighed subject in a wheelchair based on weighing sensor output calculations.
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