A shovel includes a lower traveling body, an upper swiveling body mounted to the lower traveling body, attachments including a boom attached to the upper swiveling body, an arm attached to an end of the boom, and a bucket that is an end attachment attached to an end of the arm, and a control device configured to control swiveling of the upper swiveling body and movement of the attachments so that an end portion of the bucket moves along an extension of a slope toe, which is a target line.

A main controller controlling an operation of a work vehicle includes a determination unit and an abnormal condition determination unit. The determination unit determines whether or not an attachment has a sensor based on information on an attachment. When the determination unit determines that the attachment has the sensor and when the abnormal condition determination unit cannot receive a signal from the sensor, the abnormal condition determination unit determines that an abnormal condition has occurred.

A display system for a machine includes multiple imaging devices configured to capture image data of an environment around the machine. The display system includes a position sensor configured to generate signals indicative of position of an operator seat. The display system further includes a display screen in communication with the imaging device and the position sensor. The display screen receives the image data from the multiple imaging devices. The display screen displays an image on the display screen based on the image data. The display screen receives the signals indicative of the position of the operator seat. Further, the display screen adjusts the image being displayed on the display screen based on the position of the operator seat.

Provided are a soil quality information acquisition system that enables acquisition of soil quality information at an appropriate time on a worksite, and a working machine including the system. The soil quality information acquisition system includes a body position detection part, an acquisition time determination part, a soil quality information acquisition part, and a storage part. The body position detection part acquires position information about a hydraulic excavator on the worksite. The acquisition time determination part determines an acquisition time on the basis of soil quality relevant information being information related a change in a quality on the worksite. The soil quality information acquisition part receives an acquisition signal output from the acquisition time determination part, and acquires the soil quality information in response to the acquisition signal. The storage part stores the position information and the soil quality information in association with each other.

A main controller controlling an operation of a work vehicle includes a determination unit and an abnormal condition determination unit. The determination unit determines whether or not an attachment has a sensor based on information on an attachment. When the determination unit determines that the attachment has the sensor and when the abnormal condition determination unit cannot receive a signal from the sensor, the abnormal condition determination unit determines that an abnormal condition has occurred.

A display system for a machine includes multiple imaging devices configured to capture image data of an environment around the machine. The display system includes a position sensor configured to generate signals indicative of position of an operator seat. The display system further includes a display screen in communication with the imaging device and the position sensor. The display screen receives the image data from the multiple imaging devices. The display screen displays an image on the display screen based on the image data. The display screen receives the signals indicative of the position of the operator seat. Further, the display screen adjusts the image being displayed on the display screen based on the position of the operator seat.

A shovel includes a lower traveling body, an upper swiveling body mounted to the lower traveling body, attachments including a boom attached to the upper swiveling body, an arm attached to an end of the boom, and a bucket that is an end attachment attached to an end of the arm, and a control device configured to control swiveling of the upper swiveling body and movement of the attachments so that an end portion of the bucket moves along an extension of a slope toe, which is a target line.