Remote control system for industrial vehicles, industrial vehicle, remote control device, remote control program for industrial vehicles, and remote control method for industrial vehicles

An industrial vehicle that is remotely controlled by a remote control device that includes a control device communication portion, the industrial vehicle comprising:

• a vehicle communication portion, which communicates wirelessly with the control device communication portion;
• an acquisition portion configured to acquire a received radio wave intensity of a signal received by the vehicle communication portion;
• and
• a possibility determination portion configured to perform possibility determination that
• determines that the industrial vehicle is in a permission range, in which remote control relating to traveling of the industrial vehicle using the remote control device is permitted, when a state in which the received radio wave intensity acquired by the acquisition portion is greater than or equal to a predetermined first threshold intensity continues for a predetermined first determination period, and
• determines that the industrial vehicle is in a prohibition range, which is farther from the remote control device than the permission range, when a state in which the received radio wave intensity acquired by the acquisition portion is less than a second threshold intensity, which is less than or equal to the first threshold intensity, continues for a predetermined second determination period,
• wherein the prohibition range is a range in which remote control relating to traveling of the industrial vehicle using the remote control device is prohibited even under conditions where wireless communication between the vehicle communication portion and the control device communication portion is performed.

A remote control device used to remotely control an industrial vehicle that includes a vehicle communication portion, the remote control device comprising:

• a control device communication portion, which communicates wirelessly with the vehicle communication portion;
• an acquisition portion configured to acquire a received radio wave intensity of a signal received by the control device communication portion;
• and
• a possibility determination portion configured to perform possibility determination that
• determines that the industrial vehicle is in a permission range, in which remote control relating to traveling of the industrial vehicle using the remote control device is permitted, when a state in which the received radio wave intensity acquired by the acquisition portion is greater than or equal to a predetermined first threshold intensity continues for a predetermined first determination period, and
• determines that the industrial vehicle is in a prohibition range, which is farther from the remote control device than the permission range, when a state in which the received radio wave intensity acquired by the acquisition portion is less than a second threshold intensity, which is less than or equal to the first threshold intensity, continues for a predetermined second determination period,
• wherein the prohibition range is a range in which remote control relating to traveling of the industrial vehicle using the remote control device is prohibited even under conditions where wireless communication between the vehicle communication portion and the control device communication portion is performed.

A non-transitory computer-readable storage medium storing an industrial vehicle remote control program for remotely controlling an industrial vehicle that includes a vehicle communication portion by using a remote control device that includes a control device communication portion, which communicates wirelessly with the vehicle communication portion,

• the industrial vehicle remote control program causing the industrial vehicle or the remote control device to function as:
• an acquisition portion configured to acquire a received radio wave intensity of a signal communicated wirelessly between the vehicle communication portion and the control device communication portion;
• and
• a possibility determination portion configured to perform possibility determination that
• determines that the industrial vehicle is in a permission range, in which remote control relating to traveling of the industrial vehicle using the remote control device is permitted, when a state in which the received radio wave intensity acquired by the acquisition portion is greater than or equal to a predetermined first threshold intensity continues for a predetermined first determination period, and
• determines that the industrial vehicle is in a prohibition range, which is farther from the remote control device than the permission range, when a state in which the received radio wave intensity acquired by the acquisition portion is less than a second threshold intensity, which is less than or equal to the first threshold intensity, continues for a predetermined second determination period,
• wherein the prohibition range is a range in which remote control relating to traveling of the industrial vehicle using the remote control device is prohibited even under conditions where wireless communication between the vehicle communication portion and the control device communication portion is performed.

An industrial vehicle remote control method for remotely controlling an industrial vehicle including a vehicle communication portion by using a remote control device that includes a control device communication portion, which communicates wirelessly with the vehicle communication portion, the method comprising:

• an acquisition step for acquiring a received radio wave intensity of a signal communicated wirelessly between the vehicle communication portion and the control device communication portion;
• and
• a possibility determination step for performing possibility determination that
• determines that the industrial vehicle is in a permission range, in which remote control relating to traveling of the industrial vehicle using the remote control device is permitted, when a state in which the received radio wave intensity acquired by the acquisition step is greater than or equal to a predetermined first threshold intensity continues for a predetermined first determination period, and
• determines that the industrial vehicle is in a prohibition range, which is farther from the remote control device than the permission range, when a state in which the received radio wave intensity acquired by the acquisition step is less than a second threshold intensity, which is less than or equal to the first threshold intensity, continues for a predetermined second determination period,
• wherein the prohibition range is a range in which remote control relating to traveling of the industrial vehicle using the remote control device is prohibited even under conditions where wireless communication between the vehicle communication portion and the control device communication portion is performed.