JP4420542B2 - Waveform recorder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waveform recording apparatus, and more particularly to improvement of real-time processing for waveform data.
[0002]
[Prior art]
In recent years, a waveform recording apparatus generally inputs an analog measurement waveform signal to an A / D converter and converts it into digital waveform data, and takes the converted digital waveform data into a memory or converts these converted digital waveform data. Based on the above, the analog measurement waveform is reproduced and displayed on the display unit or reproduced and recorded on the recording paper.
[0003]
In addition, depending on the measurement application, the result of filtering the analog measurement waveform signal is displayed or recorded.
[0004]
[Problems to be solved by the invention]
However, in the conventional waveform recording apparatus, the waveform data that can be written to the memory is limited to only one system.
For this reason, for example,
1) Filtered waveform data can be retained but original waveform data cannot be retained. 2) Even if two or more arithmetic processes or two or more types of filter processes are performed on the original waveform data, the processing results are individually obtained. 3) There is a problem that the effective value of the waveform and the specific frequency component cannot be simultaneously recorded in real time while the original waveform data is taken into the memory.
[0005]
The present invention solves these problems, and enables multiple types of waveform data processing to be executed in parallel in real time.
[0006]
[Means for Solving the Problems]
The invention of claim 1 which achieves such an object temporarily stores an A / D converter for converting an analog measurement waveform signal into digital waveform data, and digital waveform data converted and output from the A / D converter. A first register , an arithmetic unit that performs a plurality of independent independent arithmetic processing operations on the digital waveform data stored in the first register in real time, and an independent real-time operation of the arithmetic unit the results and a plurality of second register for temporarily storing each of these with a data memory for sequentially storing the data stored in the second register, a memory controller that controls the data writing to the data memory, the operation timing of these sections It is composed of a timing controller for controlling, as a trigger independent real-time calculation result of the arithmetic unit Wherein performs data writing to the data memory, on the basis of the data stored in the second register, a waveform recording device and performing at least one of the waveform display and waveform printout in real time.
[0007]
As described above, since the arithmetic unit is provided between the first register and the plurality of second registers, a plurality of waveform data processes can be executed in real time in parallel. Then, by writing data to the data memory using the calculation result of the calculator as a trigger, data writing control to the data memory by a dynamic variable trigger can be performed. Furthermore, it is possible to display and record a plurality of waveform data and calculation processing results in real time.
[0008]
According to the second aspect of the present invention, a plurality of A / D converters that convert 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, A plurality of first registers temporarily stored for each system , a calculator for performing independent arithmetic processing of a plurality of systems preset in advance on the digital waveform data stored in the first register, and a plurality of second register for temporarily storing arithmetic unit independent real-time operation results, respectively, and a data memory for storing the data stored in these second registers successively, a memory for controlling data writing into the data memory controller and is constituted by a timing controller for controlling the operation timing of these sections, independent real-time operation of the operation unit Fruit performs data writing into the data memory as a trigger, based on the data stored in the second register, the waveform recording device and performing at least one of the waveform display and waveform printout in real time is there.
[0009]
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 related to the measurement waveform signal system can be executed in parallel in real time. Then, by writing data to the data memory using the calculation result of the calculator as a trigger, data writing control to the data memory by a dynamic variable trigger can be performed. Furthermore, it is possible to display and record a plurality of waveform data and calculation processing results in real time.
[0010]
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 the computing unit.
[0011]
By using a digital signal processor, various kinds of arithmetic processing can be automatically executed in a short time.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram showing a specific example of an embodiment of the present invention. In the figure, the analog measurement waveform signal input to the input terminal 1 is gain-adjusted to an appropriate amplitude by the amplifier 2 and then applied to the A / D converter 3.
[0017]
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 TS <b> 1 input from the timing controller 9, and stores these waveform data in the primary register 4. . Here, for example, when sampling is performed at 10 KHz, timing signals at intervals of 0.1 ms are generated.
[0018]
The measurement data stored in the primary register 4 is read into the calculator 7 at the next sampling timing and subjected to preset calculation processing. The arithmetic processing of the arithmetic unit 7 is executed based on the timing signal TS2 input from the timing controller 9. These calculation results are written in the secondary register 5. Note that the calculation in the calculator 7 is not limited to one calculation, and it is possible to perform independent calculations of a plurality of systems, and the independent calculation results of the plurality of systems are assigned to each of the plurality of secondary registers 5. To be written. When the original waveform data is written as it is, the waveform data is written in the assigned secondary register 5 without performing any arithmetic processing.
[0019]
A specific calculation processing example will be described.
For example, based on the waveform data D _n of the primary register 4, write D _n to the secondary register 5a as original waveform data, write the square value D _n ² the second register 5b, the output data FIL of the digital filter (D _n) Is written to the secondary register 5c. In FIG. 1, the number of secondary registers 5 is three, a to c. However, more than four secondary registers 5 may be simultaneously executed in parallel.
[0020]
The calculation result written in each of the secondary registers 5a to 5c is as follows according to the select signal SEL, the memory address bus control signal MAB and the write control signal W of the secondary registers 5a to 5c output from the memory controller 8. A timing signal is written to a predetermined address in the memory 6 via the memory data bus 10.
[0021]
FIG. 3 is a diagram for explaining the correspondence between addresses and data in the memory 6. The original waveform data D _n written in the secondary register 5a is written at address 0, and the square value D _n ² written in the secondary register 5b is The digital filter output data FIL (D _n ) written at address 1000 and written in the secondary register 5c is written at address 2000.
[0022]
Such a series of operations is executed in a pipeline manner as shown in the timing chart of FIG. 2, and the calculation result of the calculator 7 is sequentially written into the memory 6 for each sampling as shown in FIG.
[0023]
In the embodiment of FIG. 1, an example in which the analog measurement waveform signal is one system is shown, but the present invention is also effective for a plurality of systems.
When processing analog measurement waveform signals of a plurality of systems, a plurality of A / D converters that convert the analog measurement waveform signal systems into digital waveform data, and digital signals that are converted and output from each A / D converter A plurality of first registers that temporarily store waveform data for each system may be provided. The number of secondary registers may be 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.
[0024]
For example, by using two secondary registers for one analog measurement waveform signal system, two calculation results can be obtained simultaneously in real time, and when four are used, four types of calculations can be executed simultaneously in real time.
[0025]
Note that the arithmetic unit 7 may be a digital signal processor (DSP) or a CPU that performs arithmetic processing according to a software program.
Further, it may be realized by an ASIC-complete hardware circuit.
Further, the calculation contents may be set and programmed in advance.
[0026]
Further, waveform display and waveform print recording may be performed in real time based on data written to the secondary register.
[0027]
Furthermore, it is also possible to configure so that the calculation result is fetched into the memory as a trigger, and according to such a configuration, memory fetching control with a dynamic trigger level can be realized.
[0028]
【The invention's effect】
As described above, according to the present invention, an arithmetic unit is provided between a primary register and a plurality of secondary registers, so that a plurality of independent arithmetic processes based on one analog measurement waveform signal system can be performed simultaneously. Can be executed in real time, and was not possible with the conventional configuration 1) Saving filtered waveform data and original waveform data 2) Executing two or more arithmetic processes and two or more types of filter processes on the original waveform data Individual storage of these processing results 3) Capturing of original waveform data into a memory and simultaneous real-time recording of the effective value and specific frequency component of the waveform are possible, which is suitable for various waveform analysis.
[Brief description of the drawings]
FIG. 1 is a block diagram showing 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 correspondence example diagram of addresses and data in the memory 6 of FIG. 1;
[Explanation of symbols]
1 Input Terminal 2 Amplifier 3 A / D Converter 4 Primary Register 5 Secondary Register 6 Memory 7 Operator 8 Memory Controller 9 Timing Controller 10 Memory Data Bus

Claims (3)

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 that performs a plurality of independent independent arithmetic processing in advance on the digital waveform data stored in the first register in real time ;
A plurality of second registers for the arithmetic unit independent real-time operation result temporarily stored respectively,
A data memory for sequentially storing the data stored in these second registers;
A memory controller for controlling data writing to the data memory;
It consists of a timing controller that controls the operation timing of these parts,
It performs data writing into the data memory independent real-time calculation result of the arithmetic unit as a trigger, based on the data stored in the second register, performing at least one of the waveform display and waveform printout in real time A waveform recording apparatus. A plurality of A / D converters for converting a plurality of analog measurement waveform signals into digital waveform data for each system;
A plurality of first registers for temporarily storing digital waveform data converted and output from each A / D converter for each system;
An arithmetic unit that performs a plurality of independent independent arithmetic processing in advance on the digital waveform data stored in the first register in real time ;
A plurality of second registers for the arithmetic unit independent real-time operation result temporarily stored respectively,
A data memory for sequentially storing the data stored in these second registers;
A memory controller for controlling data writing to the data memory;
It consists of a timing controller that controls the operation timing of these parts,
It performs data writing into the data memory independent real-time calculation result of the arithmetic unit as a trigger, based on the data stored in the second register, performing at least one of the waveform display and waveform printout in real time A waveform recording apparatus.   3. The waveform recording apparatus according to claim 1, wherein a digital signal processor is used as the arithmetic unit.

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