The present invention discloses a weight-bearing measurement device and method and weight-bearing equipment. The weight-bearing measurement device comprises a weight sensor, an acceleration sensor and a processing unit, wherein the weight sensor comprises a deformable 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 disposed on the deformable body and is configured to generate an output voltage that represents the deformation under the action of an input voltage; the acceleration sensor is configured to generate acceleration components in three directions perpendicular to one another respectively under the action of gravity of the borne object; and the processing unit is configured to calculate the gravity and/or the mass of the borne object in accordance with the acceleration components in the three directions, the input voltage, the output voltage, and conversion coefficients of the bridge circuit in the three directions.

The present invention relates to a load cell for a scale having a monolithically configured measurement body that has a force reception section, a force introduction section, and a joint section arranged between the force reception section and the force introduction section, having at least one strain gauge arranged at the upper side on the joint section for detecting a stretching deformation of the measurement body, and having electronics that are arranged at the force reception side, that are at least partly arranged on a circuit board, and that have a memory in which calibration data of the load cell and/or a value for gravity are stored, wherein a hardware interface is provided via which the memory can be accessed and via which the calibration data stored in the memory and/or the value for gravity can be changed.

The present invention relates to a load cell for a scale having a monolithically configured measurement body that has a force reception section, a force introduction section, and a joint section arranged between the force reception section and the force introduction section, having at least one strain gauge arranged at the upper side on the joint section for detecting a stretching deformation of the measurement body, and having electronics that are arranged at the force reception side, that are at least partly arranged on a circuit board, and that have a memory in which calibration data of the load cell and/or a value for gravity are stored, wherein a hardware interface is provided via which the memory can be accessed and via which the calibration data stored in the memory and/or the value for gravity can be changed.

Various methods and systems are provided for a drift-compensated force measurement. In one example, a method includes obtaining a single output voltage measurement from a strain gauge of an infant scale, the single output voltage reflective of a weight applied to the scale; obtaining a voltage measurement across each of four resistors of the strain gauge to determine four separate voltage measurements and determining a drift voltage based on the four separate voltage measurements; and outputting a corrected weight value determined based on a difference between the single output voltage and the drift voltage

A weight scale includes a load cell, an amplifier, an A/D converter, and a CPU that includes: a determining unit configured to determine whether the measurement target is a heavy object or a light object; and a classified weight measurement control unit configured to set up the amplifier, based on the determining as to whether the measurement target is the heavy object or the light object, for a measurement range narrower than a maximum measurement range of the amplifier and also for an amplification factor larger than an amplification factor used with the maximum measurement range, so as to match the heavy object or the light object, and thereafter cause the amplifier to amplify an output voltage of the load sensor and the A/D converter to convert an output of the amplifier from analog to digital, to obtain a weight value of the measurement target.

A weight scale includes a load cell, an amplifier, an A/D converter, and a CPU that includes: a determining unit configured to determine whether the measurement target is a heavy object or a light object; and a classified weight measurement control unit configured to set up the amplifier, based on the determining as to whether the measurement target is the heavy object or the light object, for a measurement range narrower than a maximum measurement range of the amplifier and also for an amplification factor larger than an amplification factor used with the maximum measurement range, so as to match the heavy object or the light object, and thereafter cause the amplifier to amplify an output voltage of the load sensor and the A/D converter to convert an output of the amplifier from analog to digital, to obtain a weight value of the measurement target.

Various methods and systems are provided for a drift-compensated force measurement. In one example, a method includes obtaining a single output voltage measurement from a strain gauge of an infant scale, the single output voltage reflective of a weight applied to the scale; obtaining a voltage measurement across each of four resistors of the strain gauge to determine four separate voltage measurements and determining a drift voltage based on the four separate voltage measurements; and outputting a corrected weight value determined based on a difference between the single output voltage and the drift voltage

A scale is provided with: a case base; and a case cover arranged on the case base, the case cover being configured such that a load is applied to the case cover. The scale is provided with: a plurality of strain generating bodies configured to support the case cover on the case base, the strain generating bodies each having a strain generating part, the strain generating part being configured to be elastically deformed by receiving the load applied to the case cover; and a strain sensor provided on the strain generating part of each of the strain generating bodies, the strain sensor being configured to give a resistance value varied in accordance with tension and compression due to deformation of the strain generating part. The strain sensor includes a first strain gauge and a second strain gauge, the first strain gauge being arranged at a site deformed into the recessed shape in a state in which the strain generating part is elastically deformed, and the second strain gauge being arranged at a site deformed into the projected shape in a state in which the strain generating part is elastically deformed. In a mutually adjacent pair among the strain generating bodies, the strain sensor of the strain generating body serving as a first partner is arranged on a front surface of the strain generating part, and the strain sensor of the strain generating body serving as a second partner is arranged on a back surface of the strain generating part.

A scale is provided with: a case base; and a case cover arranged on the case base, the case cover being configured such that a load is applied to the case cover. The scale is provided with: a plurality of strain generating bodies configured to support the case cover on the case base, the strain generating bodies each having a strain generating part, the strain generating part being configured to be elastically deformed by receiving the load applied to the case cover; and a strain sensor provided on the strain generating part of each of the strain generating bodies, the strain sensor being configured to give a resistance value varied in accordance with tension and compression due to deformation of the strain generating part. The strain sensor includes a first strain gauge and a second strain gauge, the first strain gauge being arranged at a site deformed into the recessed shape in a state in which the strain generating part is elastically deformed, and the second strain gauge being arranged at a site deformed into the projected shape in a state in which the strain generating part is elastically deformed. In a mutually adjacent pair among the strain generating bodies, the strain sensor of the strain generating body serving as a first partner is arranged on a front surface of the strain generating part, and the strain sensor of the strain generating body serving as a second partner is arranged on a back surface of the strain generating part.

A fixture includes a shelf upon which items may be placed. In one implementation, the shelf is supported by four load cells that provide load cell data that may be used to calculate weight data for the load on the shelf. The load cells are mounted underneath a frame, with an upper portion of a load mount extending upward through the frame and engaged to the shelf. The shelf and the frame include stiffeners to increase rigidity, improving the quality of the load cell data. Electronics and a wiring harness are located underneath the frame. In this configuration, assembly of the fixture may be accomplished completely from the underside, simplifying assembly.