Measured data synchronizing system and measured data synchronizing method

• US 6,760,677 B2
• Filed: 12/18/2002
• Issued: 07/06/2004
• Est. Priority Date: 02/18/2002
• Status: Expired due to Fees

• Current Assignee: Yokogawa Electric Corporation
• Original Assignee: Yokogawa Electric Corporation
• Inventors: Tanizume, Yasuhiro
• Primary Examiner(s): Barlow, John
• Assistant Examiner(s): PRETLOW, DEMETRIUS R
• Application Number:
  US10/321,539
• Publication Number:
  US 20030158682A1
• Time in Patent Office: 566 Days
• Field of Search: 702/89, 702/85, 702/127
• US Class Current: 702/89
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

The objective of the present invention is to achieve a measured data synchronizing system and a measured data synchronizing method which can determine the measured data whose synchronization is secured among measuring units without being restricted by the number of measuring units in the measuring part.

The present invention is characterized by preparing a communication line, a plurality of measuring units which receive a reference time from the above communication line as an input and output tuple data in which at least the above reference time and the measured data are contained and arranged as a tuple, and a data processing unit which outputs the reference time to the above communication line, receives tuple-data from each of the above plurality of measuring units as inputs and secures synchronization of the measured data among the measuring units based on the reference time of the tuple-data.

Claims

1. A measured data synchronizing system comprising:

a communication line,

a plurality of measuring units, each of which receives a reference time from the above communication line as an input and outputs tuple-data in which at least the above reference time and the measured data are contained and arranged as a tuple, and

a data processing unit which outputs a reference time to said communication line, receives tuple-data from each of said plurality of measuring units as inputs and takes synchronization of the measured data among the measuring units based on the reference time of the tuple-data.

2. A measured data synchronizing system in accordance with claim 1, wherein said data processing unit restores measuring waveforms using the measured data and carries out resampling at desired times.

3. A measured data synchronizing system in accordance with claim 1 or claim 2, wherein said data processing unit comprises:

a communication circuit which inputs/outputs signals from/to a plurality of measuring units via a communication line,

a reference time output means which outputs reference times to this communication circuit,

a memorizing means in which tuple-data for said plurality of measuring units output from said communication circuit are stored,

an interpolating means which reads the tuple-data in said memorizing means, interpolates the data based on the read tuple-data, and outputs the interpolated data,

a filtering means which carries out filtering of the interpolated data from said interpolating means and outputs the filtered data, and

a resampling means which resamples the filtered data from said filtering means at desired times.

4. A measured data synchronizing system in accordance with any of claim 1 or 2, wherein said measuring unit comprises:

a communication circuit which inputs/outputs signals from/to said data processing unit via a communication line,

a data storing means which stores tuple-data,

a control means which outputs a reference time and a control signal by a signal from said communication circuit, reads the tuple-data in said data storing means, and outputs the read tuple-data to said communication circuit,

a measuring means which measures the object to be measured according to the control signal of said control means and outputs the measured data, and

a data acquisition means which receives at least the measured data in said measuring means and the reference time from said control means as inputs and stores the tuple-data in which those inputs are arranged as a tuple to said data storing means.

5. A measured data synchronizing system in accordance with claim 4, wherein said data storing means is an FIFO.

6. A measured data synchronizing system in accordance with claim 4, wherein said measuring unit has a unit'"'"'s time output means which outputs a unit'"'"'s time, and said data acquisition means receives said unit'"'"'s time from the unit'"'"'s time output means, measured data, and a reference time as inputs and stores the tuple-data in which those inputs are arranged as a tuple to said data storing means.

7. A measured data synchronizing system in accordance with claim 6, wherein said interpolating means, if the reference time is missing, carries out interpolation using said unit'"'"'s time.

8. A measured data synchronizing system in accordance with any of claim 4, wherein said measuring unit has a unit'"'"'s time output means which outputs a unit'"'"'s time, and said data acquisition means receives said unit'"'"'s time from the units time output means, measured data, and a reference time as inputs and stores the tuple-data in which those inputs are arranged as a tuple to said data storing means.

9. A measured data synchronizing method in which,

a reference time output means outputs reference times to a communication line,

a plurality of measuring units outputs tuple-data in which

at least said reference data and measured data obtained by measuring objects to be measured are arranged as tuples to said communication line, and

a data processing means receives said tuple-data as inputs from said communication line and takes synchronization among measured data in each measuring unit based on the reference times within said tuple-data.