A digital filter for a digital weigher reduces a calculation time in an adapted filter while maintaining weighing accuracy, a digital weigher includes the filter for the weigher, and a wave filtering process method uses the digital filter for the digital weigher. A fixation section of a FIR filter removes an oscillating component in a predetermined frequency range, from a digital weighing signal. A determination device determines whether an amplitude of an oscillating component contained in a digital weighing signal derived by performing a wave filtering process falls within a predetermined damping range. A control device changes a frequency range of an oscillating component to be removed by an adaptive section of the filter based on a result of the determination. The adaptive section of the filter performs the wave filtering process with respect to the oscillating component in the frequency range changed by the control device.

A surgery table load monitoring system utilizing a base member fixed to a surgery table support. The base member is connected to at least one platform structural member to determine load forces due to the weight of a patient on the platform structured member. Detectors are used to indicate particular stresses and generate a signal which may be employed to disable movement of the surgery table.

A load cell (1) has a deformable body with upper and lower contact surfaces (3, 4), through which a force is introduced. Support points (5) of the contact surfaces define a line of action (6) of the force. At least one column-shaped portion (7) of the deformable body has a central longitudinal axis (8) and a circumferential surface whose generating line runs parallel to the central longitudinal axis (8). A first determining means (9) installed on the column-shaped portion converts a mechanical deformation into an electronic signal, and a second determining means (10) installed on the column-shaped portion converts a deviation of the central longitudinal axis (8) from the line of action (6) into a representative signal. Each determining means has at least one strain gauge.

An electronic scale includes a weight sensor, a control unit connected to the weight sensor and a detection circuit connected to the control unit and to the weight sensor, the detection circuit being distinct from the control unit. The detection circuit is configured to periodically control a voltage supply to the weight sensor, to detect an increase in weight above a predetermined threshold and to send a weight measurement initiation command to the control unit. The control unit is then configured to wake up from a standby state and implement a weight measurement by issuing a command to supply voltage to the weight sensor and by performing a processing of the voltage across the weight sensor.

An electronic scale includes a weight sensor, a control unit connected to the weight sensor and a detection circuit connected to the control unit and to the weight sensor, the detection circuit being distinct from the control unit. The detection circuit is configured to periodically control a voltage supply to the weight sensor, to detect an increase in weight above a predetermined threshold and to send a weight measurement initiation command to the control unit. The control unit is then configured to wake up from a standby state and implement a weight measurement by issuing a command to supply voltage to the weight sensor and by performing a processing of the voltage across the weight sensor.

A weight and torque sensor for an earth-boring drill bit may include a ring structure having a front face, a rear face, an inside surface, and an outside surface. A major axis of the sensor may be parallel to a longitudinal axis of the drill bit when the weight and torque sensor is mounted to the earth-boring drill bit. The sensor may include a weight strain gauge disposed on the inside surface of the ring structure. The weight strain gauge may be at a position on the inside surface of the ring structure that is aligned with, or perpendicular to, the major axis. The sensor may further include a torque strain gauge disposed on the inside surface of the ring structure. The torque strain gauge may be at a position on the inside surface of the ring structure that is offset but not perpendicular to the major axis.

A weight and torque sensor for an earth-boring drill bit may include a ring structure having a front face, a rear face, an inside surface, and an outside surface. A major axis of the sensor may be parallel to a longitudinal axis of the drill bit when the weight and torque sensor is mounted to the earth-boring drill bit. The sensor may include a weight strain gauge disposed on the inside surface of the ring structure. The weight strain gauge may be at a position on the inside surface of the ring structure that is aligned with, or perpendicular to, the major axis. The sensor may further include a torque strain gauge disposed on the inside surface of the ring structure. The torque strain gauge may be at a position on the inside surface of the ring structure that is offset but not perpendicular to the major axis.