Data recorder

Details Data recorder Data recorder

1998-04-03

2001-02-06

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

History logging or time stamping

C702S056000, C702S141000

Reexamination Certificate

active

06185513

ABSTRACT:

TECHNICAL FIELD
The invention presented refers to a data recorder taking environmental data, in particular temperature data over a pre-defined period of time.
BACKGROUND OF THE INVENTION
A variety of products, especially in medicine and food processing, require strict adherence to certain upper or lower temperature limits during their storage and transport. Otherwise, their characteristic properties are impaired or lost.
Monitoring systems suitable to guarantee such recording have already been developed with widespread use of so-called transition indicators. These transition indicators are in a position to record the adherence to certain value limits, for instance temperature. A further variation of these systems are the so-called data loggers, which are included with the goods to be monitored as electronic cubes or blocks of several cm
3
volume.
A major draw-back of the transition indicators mentioned first is that they only discern the adherence to certain value limits and do neither record the duration and time, nor offer the desirable resolution. The data loggers display the disadvantage of being rather expensive compared to the Transition indicators and, in addition, can be removed easily from the goods to be monitored thus opening the door for manipulation.
SUMMARY OF THE INVENTION
A data recorder has been presented consisting of at least one sensor unit to compile at least one measurement value to be recorded during a monitoring interval, a control unit, preferably a microprocessor unit for the control of the compiling and recording of measurement data, a clock unit to provide a reference time on the basis of which conclusions on the actual measurement times are possible, a memory unit to store the measurement values compiled and preferable the reference time provided by the clock unit for each measurement time, a battery unit for power supply, a fixation unit to fix the data recorder to an item to be monitored, an interruption unit to interrupt the compiling and/or recording of measurement values, upon any manipulation of the fixation unit.


REFERENCES:
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patent: 5117096 (1992-05-01), Bauer et al.
patent: 5153842 (1992-10-01), Dlugos, Sr. et al.
patent: 5173609 (1992-12-01), Lacoste et al.
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Bangs, The Newest Generation; it Could be Christened “Sherlock”, May 1968.
Shupe et al., Designing an Instrumented test Egg for Detecting Impact Breakage, unknown date (presumed prior art).
Poulalion, The Recording and Preparation of Transportation Environmental Data, Apr. 1969.
TEMARS, unattributed, 1967.
Impact Recorders—They're Reaching New Levels of Sophistication, unattributed, May 1968.
Data Recorders: Priciples and Applications, Kawai, Test & Measurement World, Oct. 1984.

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