Multi-sensor closed-loop refrigeration control for freight containers
AssigneeGlobe Tracker, ApS
InventorRichard Meyers
Life of this patent
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Abstract
Systems and methods can control refrigeration within a refrigerated freight container. Thermal sensor nodes can be positioned within the freight container. Temperature measurements can be wirelessly relayed from the sensor nodes to a gateway associated with the freight container. The received temperature measurements can be aggregated and logged at the gateway. Thermal models of the freight container and associated cargo loads can be established in response to the logged temperature measurements and loading plan for the foreign container. The refrigeration system can be controlled in response to processing the thermal models. The refrigeration system can be controlled to optimize compliance parameters associated with the cargo loads.
Claims20
A method for refrigeration control in a freight container in active transit, the method comprising:
- wirelessly receiving, at a gateway, measurements from a first sensor node and a second sensor node, wherein,
- the measurements include at least one of temperature, humidity, and light detected by the sensor nodes, and
- the first sensor node is stored inside of a cargo load stored inside of the freight container, and
- the second sensor node is stored outside of the cargo load and inside of the freight container;
- and
- controlling a refrigeration system in the freight container based on the measurements to preserve cargo stored inside of the cargo load.
A refrigeration control system for use in a freight container in active transit, the system comprising:
- a first sensor node configured to store inside of a cargo load stored inside of the freight container;
- a second sensor node configured to store outside of the cargo load and inside of the freight container, wherein the first and the second sensor nodes measure at least one of temperature, humidity, and light;
- and
- a gateway associated with the freight container not inside any cargo load and configured to,
- wirelessly receive the measurements from the first sensor node and the second sensor node, and
- control a refrigeration system in the freight container based on the measurements to preserve cargo stored inside of the cargo load.
Dependencies are inferred from the claim text.