Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Instruments and devices for fault testing
Reexamination Certificate
2001-04-23
2002-11-19
Le, N. (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Instruments and devices for fault testing
C324S754120
Reexamination Certificate
active
06483320
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a portable-type measuring apparatus, and more particularly, it relates to a portable-type measuring apparatus in which one desired measuring unit selected from a plurality of measuring units having unique measuring functions is used so as to be incorporated with a common unit common to the measuring units, and which is constructed so that it is unnecessary to rewrite a memory for storing a program for measurement.
BACKGROUND ART
FIG. 4
is a schematic diagram of a portable-type measuring apparatus
50
constructed by incorporating a conventional common unit
51
with a measuring unit
57
.
A display unit
52
, an operation unit
53
, a memory
54
, an interface for an external device (not shown), and a CPU
55
are provided for the common unit
51
.
On the other hand, on the measuring means
57
, hardware such as an optical time domain reflectometer (hereinbelow, referred to as an OTDR), an optical spectrum analyzer, or the like is mounted.
Accordingly, when the loss or the like of an optical fiber is measured, a measuring unit
57
a
for the OTDR is inserted into a slot
56
of the common unit
51
to perform the measurement.
When an optical spectrum analysis or the like is performed, a measuring unit
57
b
for the optical spectrum analyzer is inserted into the slot
56
of the common unit
51
to perform the measurement.
However, the exclusive-use memory
54
, for example, a memory in which a program for measurement of the OTDR has been stored is previously installed in the common unit
51
.
Accordingly, in the case where the optical spectrum analysis or the like is subsequently performed, even when the measuring unit
57
b
for the optical spectrum analyzer is inserted into the slot
56
of the common unit
51
, the optical spectrum analyzer is not constructed because the program stored in the memory
54
on the common unit
51
side is different from that for the analysis.
Therefore, the contents of the memory
54
have to be rewritten to the program for the optical spectrum analyzer.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide a portable-type measuring apparatus in which, to eliminate the above drawback, a CPU for controlling measuring means, an operation unit, a display unit, and an interface unit is provided for a common unit, and a memory for storing a program to control the measuring means, the operation unit, the display unit, and the interface unit by the CPU is provided for a measuring unit to provide a program according to a measuring function on the measuring unit side, so that measurements by various functions can be performed by merely exchanging the measuring unit without rewriting the program.
Another object of the present invention is to provide a portable-type measuring apparatus in which the periphery of a first cross section is matched to that of a second cross section, the cross sections being obtained by dividing a case into two parts, to connect a first connector and a second connector, so that a connected case can be made compact, and its portability can be improved.
According to a first aspect of the present invention, there is provided a portable-type measuring apparatus comprising:
an operation unit (
5
) for inputting an instruction for measurement;
measuring means (
11
) for performing measurement specific to itself;
a display unit (
6
) for displaying a measurement result;
an interface unit (
7
) for receiving or outputting data from/to an external device;
a CPU (
8
) for controlling the operation unit, the measuring unit, the display unit, and the interface unit;
a memory (
12
) for storing a program to control the operation unit, the measuring means, the display unit, and the interface unit by the CPU; and
a case for accommodating the operation unit, the measuring unit, the display unit, the interface unit, the memory, and the CPU,
wherein the case can be separated into a common unit (
2
) and a measuring unit (
10
) and has fixing means for fixing the common unit and the measuring unit,
the common unit comprises the operation unit, the display unit, the interface unit, and the CPU,
the measuring unit comprises the measuring means and the memory,
the CPU arranged on the common unit side transmits or receives data and a control signal to/from the memory and the measuring means arranged on the measuring unit side, and
the measuring means can perform the specific measurement according to the contents of the memory.
REFERENCES:
patent: 5220499 (1993-06-01), Kawamori
patent: 6229456 (2001-05-01), Engholm et al.
patent: 0 079 086 (1983-05-01), None
patent: 63-201527 (1988-08-01), None
Honda Yutaka
Makita Satoshi
Miyashita Eiji
Sakamoto Takashi
Anritsu Corporation
Frishauf Holtz Goodman & Chick P.C.
Le N.
Nguyen Vincent Q.
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