Canadian Patents Database

Patent Summary

(12) Patent:	(11) CA 1246676
(21) Application Number:	426119
(54) English Title:	DATA LOGGING APPARATUS
(54) French Title:	DISPOSITIF RELEVEUR DE DONNEES

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Abstracts

English Abstract

ABSTRACT OF THE DISCLOSURE

Data logging apparatus for use in cathodic protection
surveys by measuring the potential difference between a buried
pipeline and the soil adjacent to it is described. The data
logging apparatus is based on a CMOS microprocessor-based
electronic circuit which digitises the analog input voltages and
displays these on a liquid crystal display. The displayed
voltages can be entered at the discretion of the surveyor into a
random access memory for permanent storage. The unit has a
keyboard which permits the user to enter data into the memory by
depressing a key. Codes corresponding to various topographical
features such as a river or railroad crossing can also be
entered and displayed to provide some reference to the potential
measurements. This coded information can also be stored in the
random access memory via the keyboard. The unit operates under
the control of a microprocessor in accordance with a number of
predetermined programs stored in an erasable programmable
read-only memory (EPROM) contained in the unit. The stored data
can be transferred under the control of the unit to an external
EPROM or it can be transmitted via a modem over a telephone line
to a host computer for analysis and presentation of the data in
graphical form to enable corrosion problems in pipelines to be
rapidly identified. The data logging unit also has application
outside cathodic protection surveys.




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Patent Details

(52) Canadian Patent Classification (CPC):	324/45
(51) International Patent Classification (IPC):	G01R 19/25 (2006.01) G06F 17/40 (2006.01)
(72) Inventors (Country):	PAWSON, ROBIN L. (Canada) WESTLAKE, MICHAEL J. (Canada) BENCHETRIT, GERARD (Canada) LEMIRE, GERALD (Canada)
(73) Owners (Country):	PATHTECHNICS LTD. (Not Available)
(71) Applicants (Country):
(74) Agent:	GOWLING LAFLEUR HENDERSON LLP
(45) Issued:	1988-12-13
(22) Filed Date:	1983-04-13
(30) Availability of licence:	N/A
(30) Language of filing:	English

Patent Cooperation Treaty (PCT):	No

(30) Application Priority Data:	None

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View Patent Image	Download Patent Image in PDF Format	Size of Image (KB)	Number of Pages
Cover Page	Cover Page	21	1
Abstract	Abstract	40	1
Claims	Claims	281	8
Description	Description	1,053	25
Drawings	Drawings	599	23
Representative Drawing	Representative Drawing	N/A	N/A

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