JP2002062316A - Waveform recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waveform recorder with which waveform-data processing operations in a plurality of systems can be executed in parallel and in real time. SOLUTION: The waveform recorder is constituted of an A/D converter, which converts an analog measured waveform signal into digital waveform data; a first register in which the digital waveform to be converted and output from the A/D converter is stored temporarily; a computing unit which performs a computing and processing operation to the digital waveform data in the first register; a plurality of second registers in which the computed result of the computing unit is temporarily stored; a data memory in which data stored in the second registers are stored sequentially; a memory controller which controls a data write operation to the data memory and a timing controller, which controls the operation timing of the respective parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a waveform recording apparatus, and more particularly to an improvement in real-time processing of waveform data.

[0002]

2. Description of the Related Art In recent years, a waveform recording apparatus generally inputs an analog measurement waveform signal to an A / D converter to convert the signal into digital waveform data, and fetches the converted digital waveform data into a memory, and converts the digital waveform data into a memory. Based on the obtained digital waveform data, an analog measurement waveform is reproduced and displayed on a display unit, or reproduced and recorded on a recording paper.

[0003] In addition, according to a measurement application, a result of performing a filtering process on an analog measurement waveform signal is displayed or recorded.

[0004]

However, in the conventional waveform recording apparatus, the waveform data which can be written in the memory is limited to only one system. For this reason, for example, 1) the filtered waveform data can be left but the original waveform data cannot be left. 2) Even if two or more arithmetic processings and two or more types of filtering are performed on the original waveform data, 3) There is a problem that the effective value and specific frequency component of the original waveform data cannot be simultaneously recorded in real time while the original waveform data is being loaded into the memory.

The present invention has been made to solve these problems, and has been made so that waveform data processing of a plurality of systems can be executed in parallel in real time.

[0006]

According to a first aspect of the present invention, there is provided an A / D converter for converting an analog measurement waveform signal into digital waveform data, and a conversion output from the A / D converter. A first register for temporarily storing digital waveform data to be processed, an arithmetic unit for performing arithmetic processing on the digital waveform data stored in the first register,
A plurality of second registers for temporarily storing the operation results of the operation unit, a data memory for sequentially storing data stored in the second registers, a memory controller for controlling data writing to the data memory, And a timing controller for controlling the operation timing of each unit.

As described above, since the arithmetic unit is provided between the first register and the plurality of second registers, a plurality of systems of waveform data processing can be executed in parallel in real time.

According to a second aspect of the present invention, there are provided a plurality of A / D converters for converting a plurality of analog measurement waveform signals into digital waveform data for each system, and a digital waveform converted and output from each A / D converter. A plurality of first registers for temporarily storing data for each system, an arithmetic unit for performing arithmetic processing on digital waveform data stored in these first registers, and an arithmetic result of the arithmetic unit for temporary storage A plurality of second registers, a data memory for sequentially storing data stored in the second registers, a memory controller for controlling data writing to the data memory, a timing controller for controlling operation timings of these units, And characterized in that:

As described above, the A / D converter and the first register are provided for each of the plurality of analog measurement waveform signal systems, and the arithmetic unit is provided between the first register and the plurality of second registers. Various waveform data processing for a plurality of analog measurement waveform signal systems can be executed in parallel in real time.

According to a third aspect of the present invention, in the waveform recording apparatus according to the first or second aspect, a digital signal processor is used as an arithmetic unit.

By using a digital signal processor, various kinds of arithmetic processing can be automatically executed in a short time.

According to a fourth aspect of the present invention, in the waveform recording apparatus according to any one of the first to third aspects, data is written to the data memory by using a calculation result of the calculator as a trigger.

Data write control to the data memory can be controlled by a dynamic variable trigger.

According to a fifth aspect of the present invention, in the waveform recording apparatus according to any one of the first to third aspects, at least one of display and recording is performed in real time based on the data stored in the second register. It is characterized by performing.

Thus, the waveform data of a plurality of systems and the results of the arithmetic processing can be displayed and recorded in real time.

[0016]

FIG. 1 is a block diagram showing a specific example of an embodiment of the present invention. In the figure, an analog measurement waveform signal input to an input terminal 1 is gain-adjusted to an appropriate amplitude by an amplifier 2 and then applied to an A / D converter 3.

The A / D converter 3 converts the analog measurement waveform signal into a digital signal as waveform data at a predetermined sampling period based on the timing signal TS1 input from the timing controller 9, and converts the waveform data into one.
It is stored in the next register 4. Here, when sampling at, for example, 10 KHz, a timing signal is generated at intervals of 0.1 ms.

The measurement data stored in the primary register 4 is read into the arithmetic unit 7 at the next sampling timing and subjected to a predetermined arithmetic processing. Arithmetic unit 7
Is executed based on the timing signal TS2 input from the timing controller 9. These operation results are written to the secondary register 5. In addition,
The operation in the arithmetic unit 7 is not limited to one operation, and it is possible to perform independent operations of a plurality of systems.
A plurality of independent calculation results are assigned to each of the plurality of secondary registers 5 and written. When the original waveform data is to be written as it is, the waveform data is directly written to the assigned secondary register 5 without performing any arithmetic processing.

A specific calculation processing example will be described. For example, 1
Based on the waveform data D _n of the next register 4, D _{n is written} into the secondary register 5 a as original waveform data, and the square value D _n ²
Is written to the secondary register 5b, and the output data FIL (D _n ) of the digital filter is written to the secondary register 5c. In FIG. 1, the number of the secondary registers 5 is three (a) to (c). However, four or more secondary registers may be used to execute more operations at the same time.

The operation results written in the respective secondary registers 5a to 5c are the select signals SEL of the secondary registers 5a to 5c output from the memory controller 8,
In accordance with the memory address bus control signal MAB and the write control signal W, the data is written to a predetermined address of the memory 6 via the memory data bus 10 by the next timing signal.

[0021] Figure 3 is a corresponding illustration of address and data in the memory 6, are written original waveform data D _n to the secondary register 5a written to address 0, the square value written in the second register 5b D _n ² is written at address 1000,
The output data FIL (D _n ) of the digital filter written in the secondary register 5c is written to the address 2000.

Such a series of operations are executed in a pipelined manner as shown in the timing chart of FIG. 2, and the operation results of the arithmetic unit 7 are sequentially written into the memory 6 for each sampling as shown in FIG. .

Although the embodiment of FIG. 1 shows an example in which the analog measurement waveform signal has one system, the present invention is also effective for a plurality of systems. When processing a plurality of analog measurement waveform signals, a plurality of A / D converters for converting into digital waveform data are provided for each analog measurement waveform signal system.
A plurality of first registers may be provided for temporarily storing digital waveform data converted and output from the converter for each system. It is sufficient that the number of the secondary registers is at least the number of each analog measurement waveform signal system, and the combination of each analog measurement waveform signal system and the secondary register can be appropriately programmed.

For example, by using two secondary registers for one analog measurement waveform signal system, two operation results can be obtained simultaneously in real time. When four are used, four types of operations can be simultaneously executed independently in real time. Become.

The arithmetic unit 7 can be a digital signal processor (DSP) or a CPU that performs arithmetic processing according to a software program. Further, it may be realized by a complete hardware circuit formed as an ASIC. Further, the operation contents may be set and programmed in advance.

Further, the waveform display or the waveform print record may be performed in real time based on the data written in the secondary register.

Further, it is also possible to adopt a configuration in which the calculation result is taken into the memory as a trigger, and according to such a configuration, it is possible to realize a memory taking control by a dynamic trigger level.

[0028]

As described above, according to the present invention,
Since an arithmetic unit is provided between the primary register and the plurality of secondary registers, a plurality of independent arithmetic processes based on one analog measurement waveform signal system can be simultaneously executed in real time, which is impossible with the conventional configuration. There were 1) Saving of filtered waveform data and original waveform data 2) Execution of two or more arithmetic processes and two or more types of filtering processes on the original waveform data and individual saving of the processing results 3) Original waveform data This makes it possible to capture data into a memory and record the effective value of the waveform and a specific frequency component simultaneously in real time, making it suitable for various waveform analyses.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of an embodiment of the present invention.

FIG. 2 is a timing chart for explaining the operation timing of FIG. 1;

FIG. 3 is a diagram showing an example of correspondence between addresses and data in a memory 6 of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 input terminal 2 amplifier 3 A / D converter 4 primary register 5 secondary register 6 memory 7 arithmetic unit 8 memory controller 9 timing controller 10 memory data bus

Claims (5)

[Claims] An A / D converter for converting an analog measurement waveform signal into digital waveform data; a first register for temporarily storing digital waveform data converted and output from the A / D converter; An arithmetic unit for performing arithmetic processing on the digital waveform data stored in the register, a plurality of second registers for temporarily storing the arithmetic result of the arithmetic unit, and sequentially storing the data stored in the second registers. A waveform recording apparatus comprising: a data memory for storing data; a memory controller for controlling writing of data to the data memory; and a timing controller for controlling operation timings of these units. 2. A plurality of A / D converters for converting analog measurement waveform signals of a plurality of systems into digital waveform data for each system, and digital waveform data converted and output from each A / D converter for each system. A plurality of first registers for temporarily storing the digital waveform data stored in the first registers, an arithmetic unit for performing arithmetic processing on the digital waveform data stored in the first registers, and a plurality of second registers for temporarily storing the arithmetic results of the arithmetic units. A register, a data memory for sequentially storing data stored in these second registers, a memory controller for controlling data writing to the data memory, and a timing controller for controlling operation timings of these units. A waveform recording device characterized by the above-mentioned. 3. The waveform recording apparatus according to claim 1, wherein a digital signal processor is used as the arithmetic unit. 4. The waveform recording apparatus according to claim 1, wherein data writing to the data memory is performed by using a calculation result of the calculator as a trigger. 5. The waveform recording apparatus according to claim 1, wherein at least one of display and recording is performed in real time based on the data stored in the second register.