Title:
WAVEFORM RECORDER
Document Type and Number:
Japanese Patent JP3281149
Kind Code:
B2
Abstract:
PURPOSE: To continuously record waveform data of a channel input signal for a long time and print out abnormal and fluctuating portions of waveforms in real time.
CONSTITUTION: A waveform recorder comprises a first memory controller 2 for extracting waveform data sampled from a channel input signal at a slower clock timing to alternatively acquire a predetermined number of data into one of two memories 2a, 2b and into the other, a first external recorder MTU 7a for sequentially recording the waveform data fetched into the two memories 2a, 3b by a first CPU 4, a second memory controller 3 for comparing the waveform data of the input signal with given trigger conditions to extract the waveform data which has conformed to the conditions and fetch it into another memory 3a, a second external recorder MTU 10 for recording the waveform data in another memory 3a by a second CPU 9 and a printer to convert the recording data of the MTU 10 into an analog waveform diagram for outputting.
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Inventors:
Koichi Masuda
Takahiko Nakano
Takahiko Nakano
Application Number:
JP28876693A
Publication Date:
May 13, 2002
Filing Date:
October 25, 1993
Export Citation:
Assignee:
Hioki Electric Co., Ltd.
International Classes:
B41J3/407; G01D9/00; G01R13/20; G06F3/12; (IPC1-7): G01R13/20; B41J3/407; G01D9/00; G06F3/12
Domestic Patent References:
| JP472518A | ||||
| JP60253817A | ||||
| JP552886A | ||||
| JP5273244A |
Attorney, Agent or Firm:
Takuya Ohhara
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