Canadian Patents Database / Patent 1246676 Summary

Third-party information liability

Some of the information on this Web page has been provided by external sources. The Government of Canada is not responsible for the accuracy, reliability or currency of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information. Content provided by external sources is not subject to official languages, privacy and accessibility requirements.

Claims and Abstract availability

Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:

  • At the time the application is open to public inspection;
  • At the time of issue of the patent (grant).
(12) Patent: (11) CA 1246676
(21) Application Number: 426119
(54) English Title: DATA LOGGING APPARATUS
(54) French Title: DISPOSITIF RELEVEUR DE DONNEES
(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

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.




- 31 -


Note: Claims are shown in the official language in which they were submitted.

WE CLAIM:- .



1. A portable hand held data logging device comprising:
analog signal input means for receiving an analog input
signal representative of a parameter to be measured;
analog to digital conversion means coupled to the input
means for digitizing the analog input signal to provide a first
digitized signal;
code entry means for entering an alphanumeric code
representative of a topographical feature as a second digitized
signal;
display means for displaying said one of first and said
second digitized signal as a displayed digitized signal;
solid state memory means connected to the analog to
digital conversion means for storing said displayed digitized
signal therein as a stored digital signal;
data entry means actuatable by a user for transferring
said displayed digitized signal to said solid state memory means;
microprocessor control means connected to the analog to
digital conversion means, to said display means, to the solid
state memory means, and to said data entry means for controlling
the recording and storage of data by the data logging apparatus;
and
data entry indicating means for indicating to said user
that after actuation of said data entry means, said displayed
digitized signal is stored in said solid state memory means.

27

2. A data logging device as claimed in claim 1, wherein
said data entry indicating means is provided by said display
means, said display digitized signal being caused to blink in
response to said data entry means being actuated, the blinking
indicating that said displayed digitized signal is stored in the
memory, said data logging device including display clearing
means for clearing said display after said data is stored in
said memory so that one of subsequent pipe-to-soil potentials
and alphanumeric codes can be displayed.



3. A data logging device as claimed in claim 2, wherein
said data transfer verifying means displays on said display
means an indication that data has been transferred from a
random-access memory (RAM) in the device to an erasable-
programmable read only memory external (EPROM).



4. A data logging device as claimed in any one of claims 1
to 3, wherein said code entry means is a keyboard, the keyboard
having a plurality of keys each being operable by a user to
enter a code for displaying alphanumeric symbols in said display
means and at least one of said plurality of keys constituting
said data entry means where said displayed digitised signal is
stored at the discretion of the user.



5. A data logging device as claimed in any one of claims 1
to 3, wherein said solid state memory means is a random-access
memory (RAM), and said data logging device is connectable to an
erasable-programmable read only memory (EPROM) coupled
externally of the unit, said stored digital signal being


28

transferable from said RAM to said external EPROM in response to
selected trouncer keys being actuated and said data logging
device having data transfer verifying means for indicating to
said user that after actuation of said transfer keys said data
has been transferred from said RAM to said EPROM.



6. A data logging device as claimed in any of one claims 1
to 3, including an eraseable programmable read-only-memory
(EPROM) coupled to said microprocessor control means, said EPROM
containing a plurality of said programs which can be executed in
response to a selection of said plurality of keys by the user.



7. A data logging system for acquisition, transfer and
analysis of data comprising a portable hand held data logging
device for measuring analog signals and recording data in the
form of said analog signals and coded alphanumeric information,
said data logging device consisting of:
analog signal input means for receiving an analog input
signal representative of a parameter to be measured;
analog to digital conversion means coupled to the input
means for digitizing the analog input signal to provide a first
digitized signal;
code entry means for entering an alphanumeric code
representative of a topographical feature as a second digitized
signal;
display means for displaying said one of first and said
second digitized signal as a displayed digitized signal;
solid state memory means connected to the analog to


29

digital conversion means for storing said displayed digitized
signal therein as a stored digital signal;
data entry means actuatable by a user for transferring
said displayed digitized signal to said solid state memory means;
microprocessor control means connected to the analog to
digital conversion means, to said display means, to the solid
state memory means, and to said data entry means for controlling
the recording and storage of data by the data logging apparatus;
and
data entry indicating means for indicating to said user
that after actuation of said data entry means, said displayed
digitized signal is stored in said solid state memory means,
data transfer means connectable between said solid state memory
and a telecommunication line, said data transfer means
comprising modulation means connected to one end of said
telecommunication line for permitting the data stored in the
memory means to be transmitted along said telecommunication
lines in serial form, and demodulation means connected to the
other end of said telecommunication line for converting said
transmitted data into a format suitable for computer analysis.



8. A system as claimed in claim 7, wherein demodulation
means is coupled to a computer terminal, said computer terminal
having display means for presenting a visual display of the said
data, said computer also having processing means for processing
said data to provide an analyzed display representative of said
measured parameter.





9. A method of measuring and processing data from an
electrical survey of pipe to soil potential differences
comprising:
measuring a potential difference between a pipe and
soil at a first location, converting the analog signal to a
digital signal, storing the digital signal in first solid state
memory means, measuring a second potential difference between
the pipe and soil at a second location and converting the second
analog to a digital signal and storing the digital signal in
said solid state memory means,
repeating the measurement for the potential differences
at other desired locations,
recording data representative of at least some of the
measurement locations,
processing the stored data to provide a relationship
between the measured potentials and the measurement locations,
in accordance with a predetermined algorithm, said algorithm
processing the data such that distances between respective known
locations are divided into a number of substantially identical
distances,
displaying the relationship in the form of a graph of
measured pipe to soil versus distance along pipe from a
reference point.



10. A method of recording data from a cathodic protection
survey comprising:
measuring a pipe-to-soil potential, visually displaying
said pipe-to-soil potential in displayed alphanumeric format,




-31-

and storing said displayed alphanumeric format at the discretion
of a user in first solid state memory means;
recording and visually displaying an alphanumeric code
representative of a topographical feature at selected locations
and storing said displayed alphanumeric code at the direction of
a user in said solid state memory means;
digitizing said pipe-to-soil potential measurement to
provide a first digitized signal and said alphanumeric code
representative of a topical feature as a second digitized signal;
actuating data entry means to store displayed
alphanumeric data in said solid state memory means in the form
of the respective digitized signal; and
verifying to the user by a displayed signal that data
has been stored in said solid state memory means.



11. A method of recording survey data as claimed in claim
10, including:
transferring the data stored in said solid state memory
means to data analysis means, said data analysis means analysing
said pipe-to-soil potentials, correlating said pipe-to-soil
potentials and said codes as a function of distance over the
length of the survey; and
visually displaying the results of said correlation.



12. A method of recording survey data as claimed in claim
10, including the step of correlating said stored digitial code
data with said stored pipe-to-soil potential and said selected
locations, and displaying the correlation in the form of a graph

32

of measured pipe-to-soil versus distance along the pipe and
identifying said topographical features on said graph.



13. A method of recording survey data as claimed in any one
of claims 10 to 12, and including the step of transferring from
said first solid state memory means to an EPROM, said EPROM
being relocated in a computer.



14. A method of recording survey data as claimed in any one
of claims 10 to 12, and including the step of transferring data
from said first solid state memory means to a modulator/
demodulator unit via the telephone lines to a computer.



15. A method of measuring and processing data from an
electrical survey of pipe-to-soil potential differences
comprising the steps of:
measuring a potential difference between a pipe and
soil at a first measurement location, converting the analog
signal to a digital signal to a digital signal, storing the
digital signal in solid state memory means at the discretion of
a user, measuring a second potential difference between the pipe
and soil at a second location and converting the second analog
to a digital signal and storing the digital signal in said solid
state memory means at the discretion of a user;
verifying to the user that data has been stored in said
solid state memory;
repeating said step of measuring potential differences
at other desired locations;




33

recording data representative of the position of at
least one of the measurement locations;
processing the stored data to provide a relationship
between the measured potentials and the measurement locations,
processing the data such that distances between respective known
locations are divided into a number of substantially identical
distances; and
displaying the relationship in the form of a graph of
measured pipe-to-soil potential against distance along the pipe
from a reference point.
34


Sorry, the representative drawing for patent document number 1246676 was not found.

For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Administrative Status , Maintenance Fee  and Payment History  should be consulted.

Admin Status

Title Date
(22) Filed 1983-04-13
(45) Issued 1988-12-13
Expired 2005-12-13

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $0.00 1983-04-13

To view selected files, please enter reCAPTCHA code :




Filter Download Selected in PDF format (Zip Archive)
Document
Description
Date
(yyyy-mm-dd)
Number of pages Size of Image (KB)
Drawings 1993-08-25 23 599
Claims 1993-08-25 8 281
Abstract 1993-08-25 1 40
Cover Page 1993-08-25 1 21
Description 1993-08-25 25 1,053