JPS578477A - Method and apparatus for measuring changeover time of trolley wire - Google Patents

Method and apparatus for measuring changeover time of trolley wire

Info

Publication number
JPS578477A
JPS578477A JP8296580A JP8296580A JPS578477A JP S578477 A JPS578477 A JP S578477A JP 8296580 A JP8296580 A JP 8296580A JP 8296580 A JP8296580 A JP 8296580A JP S578477 A JPS578477 A JP S578477A
Authority
JP
Japan
Prior art keywords
changeover
signal
motor
recorded
detected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8296580A
Other languages
Japanese (ja)
Inventor
Shinzo Furuya
Hiroshi Shimokawa
Yoshifumi Minamiyama
Takeo Iwamatsu
Junro Toge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JAPANESE NATIONAL RAILWAYS<JNR>, Japan National Railways filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP8296580A priority Critical patent/JPS578477A/en
Publication of JPS578477A publication Critical patent/JPS578477A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/14—Indicating direction of current; Indicating polarity of voltage

Abstract

PURPOSE:To elevate the reliability of a measured data, by detecting start of changeover by reversing direction of electric power applied to a motor of a trolley car having a constant load and a fly-wheel, and detecting end of changeover by sudden increase of the electric power in the course of changeover. CONSTITUTION:A motor current b' and a pantograph system voltage (c) are multiplied by a Hall multiplier 24, and a signal (e) being in proportion to instantaneous power of a motor is produced. This signal (e) is reversed 25, it is detected 26 that it has exceeded a setting level, a changeover start signal (f) is produced, then a time measuring flip-flop circuit 27 is set, and also a signal (g) is outputted and recorded into an automatic oscilloscope 28. When the signal (e) exceeds a prescribed level due to the end of changeover, it is detected 29, a flip-flop circuit 27 is reset, and simultaneously it is recorded in the automatic oscilloscope 28.
JP8296580A 1980-06-20 1980-06-20 Method and apparatus for measuring changeover time of trolley wire Pending JPS578477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8296580A JPS578477A (en) 1980-06-20 1980-06-20 Method and apparatus for measuring changeover time of trolley wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8296580A JPS578477A (en) 1980-06-20 1980-06-20 Method and apparatus for measuring changeover time of trolley wire

Publications (1)

Publication Number Publication Date
JPS578477A true JPS578477A (en) 1982-01-16

Family

ID=13788931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8296580A Pending JPS578477A (en) 1980-06-20 1980-06-20 Method and apparatus for measuring changeover time of trolley wire

Country Status (1)

Country Link
JP (1) JPS578477A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5290268A (en) * 1976-01-23 1977-07-29 Hitachi Ltd Semiconductor device
JPS5327459A (en) * 1976-08-27 1978-03-14 Japanese National Railways<Jnr> Measuring system for change-over time of trolley line

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5290268A (en) * 1976-01-23 1977-07-29 Hitachi Ltd Semiconductor device
JPS5327459A (en) * 1976-08-27 1978-03-14 Japanese National Railways<Jnr> Measuring system for change-over time of trolley line

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