US4887014A
Expired / Lapsed
US
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Industrial robot control device
Assignee: Mitsubishi Electric Corp
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Filing: 1988-02-16
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Granted: 1989-12-12
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Expires: 2008-02-16
Abstract
Abstract An industrial robot control device for use in an automobile manufacturing line for instance. The device is capable of preventing incorrect or improper operations of the machines due to a voltage drop in a power source, which occurs when a plurality of machines including the industrial robots are driven simultaneously.
Inventors
- 👤 Hisao Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:27
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/406; G05B19/4063; B; B23; B23K; B23K11/00; B23K11/24; B23K11/25; B23K11/252; H; H02; H02J; H02J3/00; H02J3/12; H02J3/14; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35402; H02J2105/00; H02J2105/50; H02J2105/52; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02B70/3225; Y02P; Y02P70/00; Y02P70/10; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
A control device for controlling a plurality of machines including industrial robots provided in a single production line comprising: means for calculating a total amount of voltage drop caused by actuations of said machines according to respective driving programs therefor at a predetermined monitoring interval; means for judging whether or not the total amount of voltage drop is equal to or smaller than a predetermined level; means for selecting at least one of said machines so that a total amount of voltage drop caused in said selected machines is made equal to or smaller than the predetermined level, when the total amount of voltage drop caused in all of said machines exceeds the predetermined level; and means for applying drive instruction signals to said machines selected by said selecting means.
Claim 2
Dependent Claim
130 words
A control device for controlling a plurality of machines including industrial robots provided in a single production line comprising: means for calculating a total amount of voltage drop caused by actuations of said machines according to respective driving programs therefor at a predetermined monitoring interval; means for judging whether or not the total amount of voltage drop is equal to or smaller than a predetermined level; means for selecting at least one of said machines so that a total amount of voltage drop caused in said selected machines is made equal to or smaller than the predetermined level, when the total amount of voltage drop caused in all of said machines exceeds the predetermined level; and means for applying drive instruction signals to said machines selected by said selecting means.
Claim 3
Dependent Claim
17 words
The device as defined in claim 1 wherein said single production line is an automobile assembling line.
Claim 4
Dependent Claim
17 words
The device as defined in claim 2 wherein said industrial robots are provided to perform welding operation.
Claim 5
Dependent Claim
26 words
The device as defined in claim 1 wherein said machines comprise spot welding devices, robots for moving workpieces and a conveying means for conveying said workpieces.
Claim 6
Dependent Claim
36 words
The device as defined in claim 1 wherein said selecting means selects said machines according to priority ranking for said machines, lower priorities being assigned to said machines which are lower in an amount of working.
Claim 7
Dependent Claim
122 words
A control device for controlling a plurality of machines including industrial robots provided in a single production line, comprising: means for calculating a total amount of voltage drop caused by machines that are driven simultaneously according to drive programs for said machines at set time periods; means for judging whether or not the total amount of voltage drop is within a predetermined value; means for selecting at least one of said machines to be driven simultaneously in accordance with priority ranking of said machines and so that a total amount of voltage drop caused in said selected machines is made equal to or smaller than the predetermined level; and means for applying drive instructions to said machines selected by said selecting means.
Claim 8
Dependent Claim
122 words
A control device for controlling a plurality of machines including industrial robots provided in a single production line, comprising: means for calculating a total amount of voltage drop caused by machines that are driven simultaneously according to drive programs for said machines at set time periods; means for judging whether or not the total amount of voltage drop is within a predetermined value; means for selecting at least one of said machines to be driven simultaneously in accordance with priority ranking of said machines and so that a total amount of voltage drop caused in said selected machines is made equal to or smaller than the predetermined level; and means for applying drive instructions to said machines selected by said selecting means.
Claim 9
Dependent Claim
71 words
The device defined in claim 6 wherein, when the total amount of voltage drop exceeds the predetermined value, said selecting means selects at least one of said machines which has lower priority, the lower priority being assigned to said machine lower in an amount of working to be performed by said machine, and said selecting means differs the start of actuation of said robot selected to a following set time period.
Claim 10
Dependent Claim
80 words
The device as defined in claim 6 wherein said calculating means divides the operation pattern of said respective machines into plural parts with set time periods, the divided parts being classified into a predetermined number of patterns, and wherein a total amount of voltage drop in said machines driven simultaneously at each of the set time periods is calculated based on voltage drop values which are stored with respect to the respective four pattens in a memory means in advance.
Claim 11
Dependent Claim
32 words
The device as defined in claim 8 wherein the predetermined number of patterns are four patterns in an accelerating mode, a decelerating mode, a constant speed operation mode and a stop mode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |