Abstract: A shovel control device includes processing circuitry that is configured to receive an input of a shape of a bucket provided at a tip of an attachment attached to a shovel, and calculate a weight of an object in the bucket, based on the input shape of the bucket and an output of a sensor whose detection result changes according to the weight of the object in the bucket.

Abstract: A work machine includes processing circuitry, and a memory storing computer-readable instructions, which when executed by the processing circuitry, cause the work machine to perform a process including calculating a load weight of a carried material loaded on a vehicle, inputting a weighbridge measured value, and generating a correction value, based on the weighbridge measured value inputted in the inputting and the load weight calculated in the calculating, wherein the calculating includes correcting the load weight by the correction value to calculate a corrected load weight.

Abstract: The invention can provide a reaction force treatment mechanism used in a stage apparatus including a pedestal, a platen which supported by the pedestal through a vibration isolation unit, a mobile body which supported by the platen and moves on the platen, and an actuator which actuates the mobile body in one direction, the reaction force treatment mechanism including: a connection portion which connects a stator of the actuator to the pedestal through an stress relief mechanism for absorbing displacement in a direction different from the one direction; and a guide portion which movably guides the stator of the actuator in the one direction while restraining the stator of the actuator relative to the platen in a direction different from the one direction.