The present invention describes a contactless signaling system for retail and other commercial environments whereby customers or workers can submit requests for assistance without the need to physically touch any button or other input device. A contactless call button unit comprises a proximity sensor operatively communicating with transmission means for sending a signal to at least one of a hub appliance and an employee communication receiver. The proximity sensor is triggered without requiring the user to physically contact the call button unit. Instead, when a portion of the user's body, such as the user's hand or finger, is within a predefined distance from the call button unit for a predefined period of time, a signal will be transmitted with a call request message.

The present disclosure provides a construction management system capable of ascertaining information about a construction site more accurately than before. A construction management system 100 comprises: a position sensor 16a detecting position information about a transport vehicle 10 that transports payload; a position sensor 26 detecting position information about a loading machine 20 that loads payload onto the transport vehicle 10; a weight detection device 120 detecting weight information about the payload held by the loading machine 20; and an information management controller 130 which, based on chronological information of the position information about the transport vehicle 10, chronological information of the position information about the loading machine, and chronological information of the weight information, calculates the load weight of the payload loaded onto the transport vehicle 10.

The present disclosure provides a construction management system capable of ascertaining information about a construction site more accurately than before. A construction management system 100 comprises: a position sensor 16a detecting position information about a transport vehicle 10 that transports payload; a position sensor 26 detecting position information about a loading machine 20 that loads payload onto the transport vehicle 10; a weight detection device 120 detecting weight information about the payload held by the loading machine 20; and an information management controller 130 which, based on chronological information of the position information about the transport vehicle 10, chronological information of the position information about the loading machine, and chronological information of the weight information, calculates the load weight of the payload loaded onto the transport vehicle 10.

A data management method, device and system based on blockchain. The data management method based on a blockchain is applied to a verification node. The method includes: acquiring transaction data including N pieces of digest data that are respectively generated on the basis of N pieces of data associated with the transaction data, and N is an integer greater than 1; selecting, from the N pieces of digest data, M pieces of digest data to be used for verification, M is an integer less than or equal to N and greater than or equal to 1; acquiring M pieces of storage data respectively corresponding to the M pieces of digest data; calculating respective digests of the M pieces of storage data, and when the M pieces of digest data are identical to the respective digests of the M pieces of storage data, respectively, writing the transaction data into a blockchain.

A data management method, device and system based on blockchain. The data management method based on a blockchain is applied to a verification node. The method includes: acquiring transaction data including N pieces of digest data that are respectively generated on the basis of N pieces of data associated with the transaction data, and N is an integer greater than 1; selecting, from the N pieces of digest data, M pieces of digest data to be used for verification, M is an integer less than or equal to N and greater than or equal to 1; acquiring M pieces of storage data respectively corresponding to the M pieces of digest data; calculating respective digests of the M pieces of storage data, and when the M pieces of digest data are identical to the respective digests of the M pieces of storage data, respectively, writing the transaction data into a blockchain.

A method for managing a ping rate for a shipment tracking device includes determining, a battery life for a power source of a shipment tracking device associated with a shipment between an origin location and a destination location. The method further includes determining a budget of pings for data transfer by the shipment tracking device, where a ping includes various data collected by a plurality of sensors on the shipment tracking device. The method further includes determining, based on the battery life for the power source and the budget of pings for the data transfer, a transit ping rate for an initial portion of a transit route. The method further includes responsive to receiving a first ping from the shipment tracking device with a first set of the various data, updating the transit ping rate based on the first ping with the first set of data.

Identification and guidance systems configured to facilitate vehicle management in logistics yards or the like are described. The systems can include an identification and guidance (I/G) unit attached to each transport vehicle within the logistics yard. The I/G unit transmits information (e.g., location and guidance information) over a wireless network to a remote controller. The remote controller can transmit relevant information received from the I/G unit to a portable communications device associated with the transport vehicle to which the JIG unit is mounted. For example, the portable communications device may be located in a tractor being used to maneuver the transport vehicle about the logistics yard so that the driver can use the information displayed on the portable communications device to assist with maneuvering the transport vehicle. Related methods are also described.

Methods and systems for identifying devices in an Internet of Things (IoT) environment are provided. A method includes detecting at least one action initiated by a user using a user device; generating at least one device type watermark for each of one or more second devices capable of performing the at least one action; transmitting, to an IoT cloud server, a request including at least one time slot for each of the one or more second devices, the request requesting each of the one or more second devices to indicate the at least one device type watermark in the at least one time slot; and identifying at least one second device to perform the at least one action, among the one or more second devices, based on detecting the at least one device type watermark indicated by the at least one second device.

Methods and systems for identifying devices in an Internet of Things (IoT) environment are provided. A method includes detecting at least one action initiated by a user using a user device; generating at least one device type watermark for each of one or more second devices capable of performing the at least one action; transmitting, to an IoT cloud server, a request including at least one time slot for each of the one or more second devices, the request requesting each of the one or more second devices to indicate the at least one device type watermark in the at least one time slot; and identifying at least one second device to perform the at least one action, among the one or more second devices, based on detecting the at least one device type watermark indicated by the at least one second device.

A delivery plan generation device includes: a processor; a communication unit configured to acquire delivery range information indicating a delivery range of an article; and a memory configured to store past congestion information and road feature information indicating characteristics of roads corresponding to the delivery range information. The processor acquires road network information indicating a connection relationship between the roads, acquires learning information generated based on a travel history of a delivery vehicle that delivers an article, and past congestion information and road feature information on the roads corresponding to the travel history, acquires congestion information on the roads for a scheduled delivery time, calculates road costs for the roads based on the road feature information, the congestion information for the scheduled delivery time, and the learning information, and generates a delivery plan of the article by using the road network information and the road costs.