JP4062480B2 - Waveform recorder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention simultaneously captures additional information (event information, time, alarm information, trigger information, marker, audio event, etc.) into the waveform information to be captured in the memory of the waveform recording apparatus, thereby enabling waveform reproducibility and recording results. The present invention relates to a recording apparatus with improved searchability.
[0002]
[Prior art]
In recent years, chart type recording apparatuses have been progressing toward paperless, and instead of recording waveforms on paper, data sampled by an A / D converter is recorded on a semiconductor memory or a memory medium, and the data is recorded. The number of products that display waveforms on a display is increasing.
[0003]
In the conventional chart type recording device, if an event occurs during an experiment (the occurrence of an abnormality in the experiment object or the change of the experiment parameter), the experimenter can write down a note on the chart paper instantly, and at the end of the experiment It was easy to retrieve the waveform data at the event from the memo.
[0004]
[Problems to be solved by the invention]
However, in the paperless type recording apparatus, since the data is taken into the memory, it becomes difficult for the experimenter to leave a memo. For this reason, it has become difficult to search for data based on memos.
[0005]
An object of the present invention is to realize a recording apparatus that can simultaneously write event information to a memory and use the event information as trigger information during data reproduction.
[0006]
[Means for Solving the Problems]
In order to achieve such a problem, the invention according to claim 1 of the present invention includes an A / D converter that samples and digitally converts a waveform signal to be recorded, and an output of the A / D converter is input. a trigger detector that is, outputs the a / D converter output by the trigger detector outputs the received mode to be set from the CPU and the memory controller to be written to memory, the display of the memory contents via the memory controller In the waveform recording apparatus comprising the display controller, a latch means for capturing event data input by an operator in synchronization with the sampling is provided, and the memory controller stores the contents of the latch means together with the output of the A / D converter. write to the memory, during data retrieval in the event position, the memory controller the memory Data is sent to the trigger detector, and the trigger detector detects the memory address at the time of event occurrence using the event data as a trigger source and sends it to the CPU, and the CPU sends the data before and after the event via the memory controller. And reading out from the memory and outputting to the display through the display controller .
[0007]
According to a second aspect of the present invention, in the waveform recording apparatus according to the first aspect, event data input by an operator is 1-bit information .
[0008]
According to a third aspect of the present invention, in the waveform recording apparatus according to the first aspect, the event data input by the operator is 1-bit information and event type information indicating the event generation source .
[0009]
According to a fourth aspect of the present invention , in the waveform recording apparatus according to the first aspect, time data is input instead of the event data .
[0010]
According to a fifth aspect of the present invention, in the waveform recording apparatus according to the first aspect, another file reference data is input instead of the event data.
[0011]
A sixth aspect of the present invention is the waveform recording apparatus according to the fifth aspect, wherein audio data is stored in the separate file .
[0012]
According to a seventh aspect of the present invention, in the waveform recording apparatus according to the first aspect, a detection result of the trigger detection circuit is input as the event data .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a two-channel waveform recording apparatus to which the present invention is applied. Input data e1 and e2 given to the input terminals 1 and 2 are normalized by the buffer amplifiers 3 and 4 and converted into digital data d1 and d2 by the A / D converters 5 and 6, respectively. p is a sampling timing signal of these A / D converters 5 and 6.
[0015]
The digital data d1 and d2 are sent to the trigger detector 7, and trigger detection at the time of data acquisition is performed. The trigger detection result TR is sent to the memory controller 8 and the CPU 9. The memory controller 8 receives the trigger detection result TR and writes the digital data d1 and d2 into the memory 10.
[0016]
At this time, the memory controller 8 controls the pre-trigger and post-trigger according to the setting mode according to the command S from the CPU 9 and executes the fetching of the digital data d1 and d2 into the memory 10.
[0017]
Reference numeral 11 denotes a display controller, which displays digital data d1 and d2 fetched into the memory 10 via the memory controller 8 in an appropriate form on the display 12 in accordance with a command S from the CPU 9.
[0018]
The above is a general waveform recording apparatus configuration. A feature of the present invention resides in a configuration for capturing event data input by an operator. Reference numeral 13 denotes an input terminal to which event data Ed is given. The event data Ed is input manually by the measurer, and the simplest form is 1-bit information (“1” or “0”).
[0019]
As for 1-bit information, when an event occurs, the measurer inputs information corresponding to “1” via, for example, a keyboard. The input event data Ed is guided to the latch circuit 14.
[0020]
This latch circuit latches the event data Ed with a sampling timing signal p synchronized with the sampling timing signal p of the A / D converters 5 and 6. The latch signal Ed ′ is sent to the memory controller 8 and stored in the memory 10 together with the digital data d1 and d2.
[0021]
FIG. 2 shows the mapping state of the digital data d1 and d2 and the event data Ed captured in the memory 10 in this way. The three parties correspond to the synchronized sampling timing signal and the data contents are time-series. Is memorized.
[0022]
A procedure for performing data search at an event position in such an event data capturing configuration will be described. In response to the command S of the CPU 9, the memory controller 8 reads the digital data and event data of the designated channel from the memory 10 and sends them to the trigger detector 8 as data M.
[0023]
The trigger detector 8 uses the event data of the data M as a trigger source, detects the memory address (data number) when the event occurs, and reports the address ADR to the CPU 9.
[0024]
In the CPU 9, data before and after the event is read from the memory 10 through the memory controller 8 using the address of the search result, and is displayed on the display 12 using the display controller 11.
[0025]
In the above description, the event data is 1-bit information, but various forms are possible. The event data shown in FIG. 3 includes a 1-bit event bit followed by a plurality of bits of event type information.
[0026]
The event type information is information indicating what the event generation source is. With this configuration, if an event number for an event information source is set in advance, it is possible to search and display data in the vicinity of a desired event occurrence by searching the event number information.
[0027]
Instead of event information, a time code can be taken in as time data. That is, by writing a code relating to time, it is possible to search waveform data using time as a key.
[0028]
Instead of event information, address data referring to another file may be written. For example, it is possible to use address data indicating a file storage location of audio data written as an event together with waveform data.
[0029]
As event information, a trigger detection result in the trigger detection circuit can be written.
[0030]
【The invention's effect】
As is apparent from the above description, according to the present invention, the event information is stored in the memory in synchronization with the waveform data, and the event information is returned to the trigger circuit at the time of data reproduction. Thus, it is possible to realize a waveform recording apparatus that can easily perform the search of the waveform data.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a waveform recording apparatus to which the present invention is applied.
FIG. 2 is an explanatory diagram of memory mapping in the device of the present invention;
FIG. 3 is a bit configuration diagram showing another embodiment of event data in the device of the present invention.
[Explanation of symbols]
1, 2 Waveform data input terminal 3, 4 Buffer amplifier 5, 6 A / D converter 7 Trigger detector 8 Memory controller 9 CPU
10 Memory 11 Display Controller 12 Display 13 Event Data Input Terminal 14 Latch Circuit

Claims (7)

An A / D converter for digitally converting the waveform signal to be recorded by sampling, and a trigger detector the A / D converter output is inputted, the by modes set from CPU receiving the trigger detector output In a waveform recording apparatus comprising: a memory controller that writes an A / D converter output to a memory; and a display controller that outputs the memory contents to a display device via the memory controller;
Latch means for capturing event data input by an operator in synchronization with the sampling is provided, and the memory controller writes the contents of the latch means together with the output of the A / D converter into the memory ,
When searching for data at an event position, the memory controller sends data from the memory to the trigger detector, and the trigger detector uses the event data as a trigger source to detect a memory address at the time of event occurrence and send it to the CPU. Is a waveform recording device that reads data before and after an event from the memory through the memory controller and outputs the data to the display device through the display controller . 2. The waveform recording apparatus according to claim 1, wherein event data input by an operator is 1-bit information . 2. The waveform recording apparatus according to claim 1, wherein the event data input by the operator is 1-bit information and event type information indicating the event generation source . 2. The waveform recording apparatus according to claim 1, wherein time data is input instead of the event data . 2. The waveform recording apparatus according to claim 1 , wherein another file reference data is input instead of the event data. 6. The waveform recording apparatus according to claim 5, wherein audio data is stored in the separate file . The waveform recording apparatus according to claim 1, wherein a detection result of the trigger detection circuit is input as the event data .

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