US 12,258,737 B2
Work machine, measurement method, and system
Shota Yamawaki, Tokyo (JP)
Assigned to KOMATSU LTD., Tokyo (JP)
Appl. No. 17/773,270
Filed by KOMATSU LTD., Tokyo (JP)
PCT Filed Dec. 2, 2020, PCT No. PCT/JP2020/044793
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/124880, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-226408 (JP), filed on Dec. 16, 2019.
Prior Publication US 2024/0159022 A1, May 16, 2024
Int. Cl. E02F 3/43 (2006.01); E02F 9/26 (2006.01)
CPC E02F 9/264 (2013.01) [E02F 3/431 (2013.01)] 17 Claims
OG exemplary drawing
 
11. A measurement method of measuring a mass of a load within a bucket in a work machine, the work machine including a machine main body, a boom attached to the machine main body, the bucket attached to the boom, a first actuator attached to the machine main body, the first actuator driving the boom, and a second actuator attached to the machine main body, the second actuator driving the bucket with respect to the boom, the measurement method comprising:
obtaining, via a first sensor, information on a first thrust of the first actuator;
obtaining, via a second sensor, information on a second thrust of the second actuator; and
calculating, via a controller, a mass of a load within the bucket based on the information received from the first sensor on the first thrust of the first actuator and the information received from the second sensor on the second thrust of the second actuator,
the first actuator is a boom cylinder and the second actuator is a bucket cylinder, and
the controller generates a balance expression including thrust of the bucket cylinder and a dimension between a boom pin and a pin that rotates a bell crank, the dimension being in a direction orthogonal to a direction of extension of the bucket cylinder.