Data compression device and method
A data compression device including a processor to perform a procedure comprising: obtaining data of a predetermined number (Z) of digits in a time series; and performing a compression process on the data. The data is obtained by encoding a vibration state of a measurement target. The compression process includes: deleting upper digits when the upper digits do not include significant information; and adding a unique code to a top of the upper digits when the upper digits include significant information. A digit number (X) of the upper digits is smaller than the predetermined number (Z).
1. A data compression device including a processor to perform a procedure, the procedure comprising:
obtaining data of a predetermined number (Z) of digits in a time series, the data being obtained by encoding a vibration state of a measurement target; and
performing a compression process on a difference between items of the data adjacent in the time series,
the compression process including
deleting upper digits when the upper digits do not include significant information, a digit number (X) of the upper digits being smaller than the predetermined number (Z), and
adding a unique code to a top of the upper digits when the upper digits include significant information.
2. The data compression device according to claim 1 , wherein the processor sets the digit number (X) based on a variance value of the data in the time series.
3. The data compression device according to claim 1 , wherein the processor sets the digit number (X) based on a variance value of the data in the time series.
4. The data compression device according to claim 2 , wherein the processor estimates the variance value based on a number of times that the difference between the items of the data adjacent in the time series is less than a predetermined value.
5. The data compression device according to claim 3 , wherein the processor estimates the variance value based on a number of times that the difference between the items of the data adjacent in the time series is less than a predetermined value.
6. The data compression device according to claim 1 , wherein the unique code includes a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
7. The data compression device according to claim 2 , wherein the unique code includes a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
8. The data compression device according to claim 3 , wherein the unique code includes a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
9. The data compression device according to claim 4 , wherein the unique code includes a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
10. The data compression device according to claim 5 , wherein the unique code includes a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
11. A data compression method by a processor for obtaining data of a predetermined number (Z) of digits in a time series, and performing a compression process on the data, the data being obtained by encoding a vibration state of a measurement target, the data compression method comprising:
deleting upper digits when the upper digits does not include significant information, a digit number (X) of the upper digits being smaller than the predetermined number (Z) of digits; and
adding a unique code to a top of the upper digits when the upper digits include significant information, the unique code including a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
12. A computer-readable recording medium including recorded thereon a data compression program that is executed by a computer that obtains data of a predetermined number of digits in a time series, and performs a process of compressing the data, the data being obtained by encoding a vibration state of a measurement target, the data compression program causing the computer to execute a process of:
deleting upper digits when the upper digits does not include significant information, a digit number (X) of the upper digits being smaller than the predetermined number (Z) of digits; and
adding a unique code to a top of the upper digits when the upper digits include significant information, the unique code including a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).
13. A data compression device including a processor to perform a procedure, the procedure comprising:
obtaining data of a predetermined number (Z) of digits in a time series, the data being obtained by encoding a vibration state of a measurement target; and
performing a compression process on the data, wherein the compression process includes:
deleting upper digits when the upper digits do not include significant information, a digit number (X) of the upper digits being smaller than the predetermined number (Z); and
adding a unique code to a top of the upper digits when the upper digits include significant information, the unique code including a number of digits (Y) obtained by subtracting the digit number (X) from the predetermined number (Z).