Signal measuring device

Patent metadata

Field	Value
Publication number	US-2018283899-A1
Application number	US-201415525199-A
Country	US
Kind code	A1
Filing date	Dec 1, 2014
Priority date	Dec 1, 2014
Publication date	Oct 4, 2018
Grant date	—

Abstract

This signal measuring device includes: one input circuit for receiving a process signal from each of first through Mth detection units; a signal switching unit for performing open/close switching between each detection unit and the input circuit; a signal processing unit connected to the input circuit and for processing the process signal; and a switching command unit for outputting, to the signal switching unit, a switching command signal that corresponds to an open/close time set such that one of the plurality of the detection units is connected to the input circuit, the switching command unit outputting, to the signal processing unit, a measurement command signal that corresponds to a stable measurement time which is set for each of the plurality of the detection units and after which the process signal inputted from each of the plurality of the detection units to the input circuit is stably measurable.

First claim

1 . A signal measuring device measuring process signals in a signal measurement target section, the signal measurement target section including a plurality of detection units, each detection unit detecting a continuously varying process signal,
the signal measuring device comprising:
one input circuit unit for receiving the process signal from each detection unit;
a signal switching unit for performing open/close switching between each detection unit and the input circuit unit;
a signal processing unit connected to the input circuit unit and for processing the process signal; and
a switching command unit for outputting, to the signal switching unit, a switching command signal that corresponds to an open/close time set such that one of the detection units is connected to the input circuit unit, the switching command unit for outputting, to the signal processing unit, a measurement command signal that corresponds to a stable measurement time which is set for each detection unit and after which the process signal inputted from the detection unit to the input circuit unit is stably measurable.

2 . The signal measuring device according to claim 1 , wherein
the signal switching unit has a first input terminal and a first output terminal formed therein, for the detection unit for which the process signal is generated by electromotive force, the detection unit for which the process signal is an electromotive force signal and the input circuit unit are connected via the first input terminal and the first output terminal, and the switching command unit outputs the switching command signal to the first input terminal and the first output terminal.

3 . The signal measuring device according to claim 1 , comprising
a constant current circuit unit, wherein the signal switching unit includes a second input terminal, a second output terminal, a third input terminal, and a third output terminal, for the detection unit that needs a constant current, the detection unit that needs a constant current and the input circuit unit are connected via the second input terminal and the second output terminal, the detection unit that needs a constant current and the constant current circuit unit are connected via the third input terminal and the third output terminal, and the switching command unit outputs the switching command signal to the second input terminal, the second output terminal, the third input terminal, and the third output terminal.

4 . The signal measuring device according to claim 1 , wherein
the signal switching unit includes a fourth input terminal, a fourth output terminal, a power supply unit, and a load resistance, for the detection unit that needs a power supply, the detection unit that needs a power supply, the power supply unit, and the load resistance are connected in series, the load resistance and the input circuit unit are connected in parallel, and are connected via the fourth input terminal and the fourth output terminal, and the switching command unit outputs the switching command signal to the fourth input terminal and the fourth output terminal.

5 . The signal measuring device according to claim 2 , comprising
a constant current circuit unit, wherein the signal switching unit includes a second input terminal, a second output terminal, a third input terminal, and a third output terminal, for the detection unit that needs a constant current, the detection unit that needs a constant current and the input circuit unit are connected via the second input terminal and the second output terminal, the detection unit that needs a constant current and the constant current circuit unit are connected via the third input terminal and the third output terminal, and the switching command unit outputs the switching command signal to the second input terminal, the second output terminal, the third input terminal, and the third output terminal.

6 . The signal measuring device according to claim 2 , wherein
the signal switching unit includes a fourth input terminal, a fourth output terminal, a power supply unit, and a load resistance, for the detection unit that needs a power supply, the detection unit that needs a power supply, the power supply unit, and the load resistance are connected in series, the load resistance and the input circuit unit are connected in parallel, and are connected via the fourth input terminal and the fourth output terminal, and the switching command unit outputs the switching command signal to the fourth input terminal and the fourth output terminal.

7 . The signal measuring device according to claim 3 , wherein
the signal switching unit includes a fourth input terminal, a fourth output terminal, a power supply unit, and a load resistance, for the detection unit that needs a power supply, the detection unit that needs a power supply, the power supply unit, and the load resistance are connected in series, the load resistance and the input circuit unit are connected in parallel, and are connected via the fourth input terminal and the fourth output terminal, and the switching command unit outputs the switching command signal to the fourth input terminal and the fourth output terminal.

8 . The signal measuring device according to claim 4 , wherein
the signal switching unit includes a fourth input terminal, a fourth output terminal, a power supply unit, and a load resistance, for the detection unit that needs a power supply, the detection unit that needs a power supply, the power supply unit, and the load resistance are connected in series, the load resistance and the input circuit unit are connected in parallel, and are connected via the fourth input terminal and the fourth output terminal, and the switching command unit outputs the switching command signal to the fourth input terminal and the fourth output terminal.

Assignees

• Mitsubishi Electric Corp

Inventors

• Hamaya Yoichiro

Classifications

• G01D5/14 Primary

  influencing the magnitude of a current or voltage · CPC title

• G01D21/00 Primary

  Measuring or testing not otherwise provided for · CPC title