JPS5658623A - Detecting method for load of hoisting machine in crane and the like - Google Patents

Detecting method for load of hoisting machine in crane and the like

Info

Publication number
JPS5658623A
JPS5658623A JP13478479A JP13478479A JPS5658623A JP S5658623 A JPS5658623 A JP S5658623A JP 13478479 A JP13478479 A JP 13478479A JP 13478479 A JP13478479 A JP 13478479A JP S5658623 A JPS5658623 A JP S5658623A
Authority
JP
Japan
Prior art keywords
value
load
current
hoisting machine
cycle
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.)
Granted
Application number
JP13478479A
Other languages
Japanese (ja)
Other versions
JPS6037410B2 (en
Inventor
Yoshio Fukuda
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.)
Hitachi Kiden Kogyo Ltd
Original Assignee
Hitachi Kiden Kogyo Ltd
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 Hitachi Kiden Kogyo Ltd filed Critical Hitachi Kiden Kogyo Ltd
Priority to JP13478479A priority Critical patent/JPS6037410B2/en
Publication of JPS5658623A publication Critical patent/JPS5658623A/en
Publication of JPS6037410B2 publication Critical patent/JPS6037410B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Control Of Electric Motors In General (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

PURPOSE: To perform the accurate measurement by a simple constitution by detecting the reduction of the number of rotation of a motor and the change in the secondary-side current, which accompany the change in the load and by further detecting the load on the basis of the former detection.
CONSTITUTION: A value proportional to the secondary current I2 of the motor IM for hoisting of the hoisting machine in a crane and the like is taken out by a current detector 1, the value is squered by a square integration circuit, while the time of one cycle of the secondary-side current I2 is measured by such a method that the number of pulse in one cycle is measured by using a fixed pulse generating circuit 3. And, after the square value of the current and the time of one cycle are integrated, the value thus obtained in converted into a signal, in a voltage adjusting circuit 7, proportional to the suspended load obtained by subtracting the tare value of the hoisting machine, and the suspended load is measured and indicated.
COPYRIGHT: (C)1981,JPO&Japio
JP13478479A 1979-10-18 1979-10-18 How to detect load on hoisting machine in crane etc. Expired JPS6037410B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13478479A JPS6037410B2 (en) 1979-10-18 1979-10-18 How to detect load on hoisting machine in crane etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13478479A JPS6037410B2 (en) 1979-10-18 1979-10-18 How to detect load on hoisting machine in crane etc.

Publications (2)

Publication Number Publication Date
JPS5658623A true JPS5658623A (en) 1981-05-21
JPS6037410B2 JPS6037410B2 (en) 1985-08-26

Family

ID=15136466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13478479A Expired JPS6037410B2 (en) 1979-10-18 1979-10-18 How to detect load on hoisting machine in crane etc.

Country Status (1)

Country Link
JP (1) JPS6037410B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116244U (en) * 1984-12-28 1986-07-22
JPS6211006U (en) * 1985-07-08 1987-01-23

Also Published As

Publication number Publication date
JPS6037410B2 (en) 1985-08-26

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