# US 12,000,117 B2 · Construction assisting system and work machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,117 B2 - Document ID: US12000117B2 - Status: Granted - Kind: B2 - Application number: 17/767,986 - Filed: 2020-10-13 - Published: 2024-03-14 - Granted: 2024-06-04 - Earliest claimed: 2019-10-15 - Assignees: Hitachi Construction Machinery Co., Ltd. - Applicants: Hitachi Construction Machinery Co., Ltd. - Inventors: Hiroyuki Yamada; Shinya Imura; Shiho Izumi - Web page: https://patentgrep.com/patent/US12000117B2 ## CPC - E02F 9/261: {Surveying the work-site to be treated} - E02F 9/262: {with follow-up actions to control the work tool, e.g. controller} - E02F 9/2033: {Limiting the movement of frames or implements, e.g. to avoid collision between implements and the cabin (sub-groups of E02F3/431 of E02F3/435 take precedence; for turntables E02F9/123)} - E02F 9/24: Safety devices {, e.g. for preventing overload (E02F9/226 takes precedence)} - G08B 21/22: responsive to presence or absence of persons - E02F 3/435: {for dipper-arms, backhoes or the like} - E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00) - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract A construction assisting system including a controller that performs construction assistance processing on the basis of positional relation between a worker and a hydraulic excavator, the construction assisting system including: an approach intention detecting device that detects an intention of the worker to approach the hydraulic excavator; an approach intention presenting device that presents a detection result of the approach intention detecting device to an operator of the hydraulic excavator; and an approach confirmation obtaining device that obtains a confirmation state of the operator of the hydraulic excavator for contents presented by the approach intention presenting device, the controller performing the construction assistance processing on the basis of position information of the worker when the operator of the hydraulic excavator denies the approach of the worker or when the operator of the hydraulic excavator does not confirm the intention of the worker to approach. It is thereby possible to perform construction assistance according to the intention of the worker, and further improve safety of the worker while suppressing a decrease in work efficiency. ## Claims ### Claim 1 A construction assisting system including a controller that performs construction assistance processing of assisting in construction performed by a work machine on a basis of positional relation between a worker and the work machine, the construction assisting system comprising: a worker position information obtaining device that obtains position information of the worker; an approach intention detecting device that notifies the worker of an inquiry about an intention to approach the work machine when the worker intrudes into a notification region set further outward of a movable region set as a range reachable by a structure of the work machine, and detects the intention of the worker to approach the work machine on a basis of a response to the inquiry from the worker; an approach intention presenting device that presents a detection result of the approach intention detecting device to an operator of the work machine; and an approach confirmation obtaining device that obtains a confirmation state of the operator of the work machine for contents presented by the approach intention presenting device, the controller performing safety operation as the construction assistance processing when determining that the worker has intruded into the movable region on a basis of the position information obtained by the worker position information obtaining device when the confirmation state obtained by the approach confirmation obtaining device is a state in which the operator of the work machine denies an approach of the worker or when the operator of the work machine does not confirm the intention of the worker to approach. ### Claim 2 (depends on 1) The construction assisting system according to claim 1, further comprising: a worker terminal carried by the worker, wherein the worker terminal includes the worker position information obtaining device and the approach intention detecting device. ### Claim 3 (depends on 1) The construction assisting system according to claim 1, wherein the safety operation of the construction assistance processing decreases operation speed of the work machine or stops the work machine. ### Claim 4 (depends on 1) The construction assisting system according to claim 1, wherein the safety operation of the construction assistance processing gives a warning that the worker is approaching the work machine to the worker by sound, light, or vibration. ### Claim 5 (depends on 1) The construction assisting system according to claim 1, wherein the controller does not perform the safety operation as the construction assistance processing when the confirmation state obtained by the approach confirmation obtaining device is a state in which the operator of the work machine recognizes the intention of the worker to approach. ### Claim 6 A work machine including a controller that performs construction assistance processing of assisting in construction performed by a work machine on a basis of positional relation between a worker and the work machine, the work machine comprising: a worker position information obtaining device that obtains position information of the worker; an approach intention detecting device that notifies the worker of an inquiry about an intention to approach the work machine when the worker intrudes into a notification region set further outward of a movable region set as a range reachable by a structure of the work machine, and detects the intention of the worker to approach the work machine on a basis of a response to the inquiry from the worker; an approach intention presenting device that presents a detection result of the approach intention detecting device to an operator of the work machine; and an approach confirmation obtaining device that obtains a confirmation state of the operator of the work machine for contents presented by the approach intention presenting device, the controller performing safety operation as the construction assistance processing when determining that the worker has intruded into the movable region on a basis of the position information obtained by the worker position information obtaining device when the confirmation state obtained by the approach confirmation obtaining device is a state in which the operator of the work machine denies an approach of the worker or when the operator of the work machine does not confirm the intention of the worker to approach. ### Claim 7 (depends on 6) The work machine according to claim 6, wherein the safety operation of the construction assistance processing decreases operation speed of the work machine or stops the work machine. ### Claim 8 (depends on 6) The work machine according to claim 6, wherein the safety operation of the construction assistance processing gives a warning that the worker is approaching the work machine to the worker by sound or light. ### Claim 9 (depends on 6) The construction assisting system according to claim 6, wherein the controller does not perform the safety operation as the construction assistance processing when the confirmation state obtained by the approach confirmation obtaining device is a state in which the operator of the work machine recognizes the intention of the worker to approach.