Environmental parameter indicator for perishable goods
US7392150B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2002 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Dec 11, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D9/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic device is proposed for accompanying a perishable good during one period to monitor the exposure of the good to an environmental parameter, such as temperature. The device includes a data interface for receiving data representing the exposure of the good to the environmental parameter during an immediately preceding period. It further includes a sensor for measuring the environmental parameter. Also, the device includes a processor for using a relationship specific to the good (such an Arrhenius equation for that good) to compute a characteristic of the good at the end of the one period using the received data and the output of the sensor. The device further includes a memory for recording the output of the sensor. To economise on memory usage, data is stored at a faster rate during periods when the data is of most significant (e.g. it indicates a high temperature). A switch is provided for indicating that data should not be taken into account in the computation, during a short interval, in which for example the device may be being handled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.