Weight-bearing measurement device and method and weight-bearing equipment

A weight-bearing measurement method of weight-bearing equipment, wherein the weight-bearing equipment is provided with a weight sensor, an acceleration sensor, a processing unit, and a circuit board,

• wherein the weight sensor comprises a deformable elastic body and a bridge circuit, the deformable body deforms under the action of gravity of a borne object, the bridge circuit comprises at least one resistance strain gauge that is disposed on a bearing face of the deformable body, the bridge circuit generates an output voltage (U2) that represents the deformation under the action of an input voltage (U1), and the input voltage is a fixed voltage that is loaded at an input end of the bridge circuit,
• wherein the weight-bearing measurement method comprises:
• acquiring an acceleration component (u) in a U direction, an acceleration component (v) in a V direction and an acceleration component (w) in a W direction, detected by the acceleration sensor, of the deformable body under the action of gravity of the borne object in case of weight bearing, wherein the W direction is perpendicular to the bearing face of the deformable body, and the U direction, the V direction and the W direction are perpendicular to one another respectively;
• acquiring the input voltage (U1) of the bridge circuit and the output voltage (U2) of the bridge circuit in case of weight bearing;
• and
• calculating, by the acceleration sensor, the gravity (G) and/or the mass (m) of the borne object in accordance with the acceleration components (u) in the U direction, the acceleration component (v) in the V direction and the acceleration component (w) in the W direction, the input voltage (U1), the output voltage (U2) and a conversion coefficient (Su) in the U direction, a conversion coefficient (Sv) in the V direction and a conversion coefficient (Sw) in the W direction of the bridge circuit using the following equations,
• G
• =
• U
• ⁢
• ⁢
• 2
• ×
• (
• u
• 2
• +
• v
• 2
• +
• w
• 2
• )
• U
• ⁢
• ⁢
• 1
• ×
• (
• Su
• ×
• u
• +
• Sv
• ×
• v
• +
• Sw
• ×
• w
• )
• ;
• m
• =
• G
• g
• ,
• and
• wherein the circuit board is parallel to the bearing face, and the acceleration sensor and the processing unit are disposed on the circuit board, and
• wherein each of the conversion coefficients is a constant that represents a proportional relation between a stress in a corresponding single direction and the generated output voltage.