WO2001009723A1 - Collecte de donnees relatives au temps d'interruption de production - Google Patents

Collecte de donnees relatives au temps d'interruption de production Download PDF

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Publication number
WO2001009723A1
WO2001009723A1 PCT/US1999/014371 US9914371W WO0109723A1 WO 2001009723 A1 WO2001009723 A1 WO 2001009723A1 US 9914371 W US9914371 W US 9914371W WO 0109723 A1 WO0109723 A1 WO 0109723A1
Authority
WO
WIPO (PCT)
Prior art keywords
manufacturing equipment
downtime
data
contacts
logic
Prior art date
Application number
PCT/US1999/014371
Other languages
English (en)
Inventor
Jim Hitchner
Original Assignee
Jim Hitchner
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 Jim Hitchner filed Critical Jim Hitchner
Priority to AU47186/99A priority Critical patent/AU4718699A/en
Priority to CA002356304A priority patent/CA2356304A1/fr
Priority to MXPA01006724A priority patent/MXPA01006724A/es
Priority to PCT/US1999/014371 priority patent/WO2001009723A1/fr
Publication of WO2001009723A1 publication Critical patent/WO2001009723A1/fr

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G07C3/02—Registering or indicating working or idle time only
    • G07C3/04—Registering or indicating working or idle time only using counting means or digital clocks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31205—Remote transmission of measured values from site, local to host
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31288—Archive collected data into history file
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31411—Down time, loss time estimation, calculation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/80—Management or planning

Definitions

  • DESCRIPTION TECHNICAL FIELD This invention relates generally to industrial manufacturing processes, and more specifically to an improved method and apparatus for collecting data relative to manufacturing equipment downtime.
  • BACKGROUND ART Known industrial manufacturing production processes typically consist of multiple steps, or stages, to produce a given product. Many, if not all, of the stages include power usage for the control of each process step. This power usage can be logged to generate a record as to when the process step was operational, and when it was not.
  • Downtime When the manufacturing equipment is not running it is referred to as "downtime" .
  • Downtime can either be planned (e.g., no work, nighttime, etc.) or unplanned (e.g., mechanical breakdowns, spills, etc.).
  • the cause of the downtime may be logged by hand by the operator into batch records (where such batch records are kept) .
  • the cause for a given downtime may be deciphered from the downtime pattern, if it is distinctive. Or, the cause of the downtime may exist only in the minds of the operations people, and subject to their powers of recall. There is no known on- the- fly dedicated system that exists for data gathering of downtime causes.
  • the present invention provides a method and apparatus for collecting manufacturing equipment downtime data.
  • Stopped manufacturing equipment is electrically blocked from restarting (or mechanically blocked with electric controls) until an acceptable reason has been entered (either by code or direct verbiage identification) and recognized by an electronic logic system. Locking out the restart capability until the downtime cause has been entered ensures that the causes for all downtimes are recorded in a timely fashion.
  • this restart prevention consists of controlling a process motor or device, but customizing may be necessary depending on the situation. For instance, an electric eye may be installed across a conveyor line to detect downtime of product flow, because product can bunch up (like on a bottle packaging line) and stop production even though the conveyor motor is still running. This may also include a new gate device to block movement until a proper code has been entered. Other mechanical blocks may be utilized, such as (but not limited to) a clutch plate added to a drive shaft. However, the concept is the same. Normal manufacturing operations cannot continue after stoppage until an acceptable code for downtime has been entered by the operator. This data may then be gathered and recorded to measure and define explanations for lost equipment running time. Other related data may also be gathered.
  • the present invention is in essence a functional operations meter. As such, it can be used as a comparator to measure the benefit (or, conversely, the detriment) of various operational conditions.
  • raw material specification ranges, process parameters and system procedures are largely determined by empirical means.
  • the present invention can be used to define peak operational conditions more precisely and more easily than prior methods. Provisions are included in the invention to accept external data for comparative use.
  • raw material specifications are typically set by the raw material vendor who defines normal production standards. As best as possible the performance range is evaluated by the purchasing factory, but rarely are the extremes of range available for evaluation. This method is often accepted as being economically "good enough” .
  • raw material specifications may drift around (within their range, or drift in an unspecified condition) . This change can damage (or possibly even improve) the end product. If the impact is dramatic enough for detection, the raw material specification can be tightened back (or written in for the first time if it did not previously exist) . This can increase the raw material cost. However, this new, tighter range can be quantifiably compared to performance for a more precise evaluation as described in the following two paragraphs. This has traditionally been determined largely by empirical estimations.
  • the present invention includes provisions for adding reject counts and unit costs to determine reject material cost. This is usually known with reasonable accuracy before raw material specs are changed. Total loss/unit made is equal to reject material costs/unit made added to downtime labor costs/unit made.
  • a curve can be generated by plotting total losses/unit made against raw material specification values. The integral under the curve over any range represents the losses per units made over the selected range.
  • the invention will support the following format: The loss per unit made from each lot that used the raw material within the selected narrow range are added together. This total is divided by the number of lots used for data to determine the average loss per unit made while staying within the tighter specification. This process is repeated to determine the (higher) average loss per unit made while operating within the wider window raw material specification. Finally, the ratio of the higher raw material cost per unit made divided by the normal (broad-band) raw material cost per unit made is multiplied times the average loss per unit made at the tighter specification range (to account for the price differential) . The lower average cost is the most profitable choice.
  • Process changes can also be measured for impact.
  • line speed were increased, the curve of actual total costs per unit made would first show the downward slope of reduced production costs per unit made (due to the faster line speed) ; followed by a reversal of slope direction upward of increased production losses per unit made (due to inefficiencies of the higher speed) .
  • This invention refines the precision, and/or makes the determination easier to define.
  • Novel features of the inventive method and apparatus include, but are not limited to, the following:
  • This invention has a more generic concept to make an affordable production management system available to most all industries. Management people (human beings) have to look at the data produced by this invention for trends, totals, causes, etc. Then they must decide what corrective actions they want to take. This is the way that business has always been run. Industry gathers the best data they can afford and makes the best decision they can. This invention gives businesses better data at an affordable price. (The cost is affordable because of its design and pre-packaged software core.)
  • Fig. 1 is a schematic view of a typical manufacturing production control logic circuit consisting of hardware and/or software components
  • Fig. 2 is a schematic view of a motor control logic circuit of this invention, illustrating two modifications that may be made to the existing equipment illustrated in Fig. 1;
  • Fig. 3 is a schematic view of the conceptual logic of this invention external to existing equipment.
  • ELS Electronic Logic System
  • Manufacturing Production Equipment Any electrical device, or plurality of devices, that modify a material in such a way as to make, or contribute toward making, a final product more marketable. (Used implicitly throughout this specification as being equivalent to manufacturing operations . )
  • Motor Control Starter Coil The relay coil, whether actual hardware or embedded in software, that starts the device. Motor Starter: Same as motor control starter coil.
  • PC Personal computer, the common computer .
  • Planned Downtime Anticipated downtime, such as at night, cleaning, lack of need, set-up time for a different product, preventive maintenance, etc.
  • PLC Programmable logic controller, an electronic package that contains some or all of the following features: internal relays, timers, counters, logic, etc.; and external output relay contacts, analog control signal outputs, input terminal contacts, keyboard input interfaces, etc.
  • the Device Same as manufacturing production equipment; the entity being monitored for downtime.
  • Unplanned Downtime Unplanned downtime, such as occurs due to equipment breakage, lack of feed material, etc.
  • a typical manufacturing production control logic circuit may include the following hardware and/or software components:
  • Power supply source 10 This may be 120 volts, 24 volts, 12 volts, 5 volts, etc., using either alternating (AC) or direct (DC) current, as long as the voltage is compatible with the components.
  • AC alternating
  • DC direct
  • Stop pushbutton (switch) 14 It can be either a single switch, or more than one, as shown. It is installed in series with the main logic circuit. It has been historically installed as momentary open hardware, but can also be built into software as safety allows. For example, it may consist of a momentary (press & release) , normally closed style pushbutton used by the operator to stop the motor (or other device) .
  • Start pushbutton (switch) 16 It can be either a single switch, or more than one, as shown. It is installed in parallel with the motor latching relay contacts 18 in the main logic circuit. It has been historically installed as momentary close hardware, but can also be built into software as safety allows. For example, it may consist of a momentary (press & release) normally open style pushbutton used by the operator to start the motor (or device) .
  • Latching Relay Contacts 18 This is a normally open style auxiliary contact physically located adjacent to the motor starter coil (described infra) .
  • the motor starter coil is activated (as long as all the safeties are satisfied) , the latching relay contacts 18 close and, because of these contacts 18, the motor keeps running after the start pushbutton 16 is released.
  • Safety Contacts 20 can be normally open style (as shown) or normally closed, as logic warrants. They can be relay contacts, pressure switches, alarm contacts, etc. They are wired in series with the motor starter coil as shown but are typically installed in front of the stop button to minimize the length of hot wires. They are functionally correct but are shown here after the stop button 14 for schematic clarity. These can vary from none to an unrestricted count in number depending on the application. They can be either in hardware or embedded in software. They are typically used to assure that the safety and process parameters are, and remain, met. Thermal overload protector such as a fuse
  • Safety (or Operational) Devices 24 include proximity switches (for guard-in-place, etc.), trip wires (to keep hands and bodies away, etc.) and other miscellaneous devices to shut the equipment off, which are not otherwise covered under safety contacts 20. Their physical location is as described for the safety contacts, supra.
  • Motor Starter Coil 26 This is a relay coil typically sold in a package to start a motor. It has three contacts for operating a three phase electrical motor. It is connected to a fourth pair of contacts 18 to latch the circuit closed for running. It occasionally has additional auxiliary contacts for logic use, in which case an extra coil (described infra) is not needed.
  • the device has been called a motor for convenience throughout this schematic; but it can be any electrical device, such as a heater, solenoid, etc.
  • the motor control starter coil 26 has multiple contacts, some of which start the device.
  • the pair of normally open contacts 18 in parallel with the start button 16 are closed by the motor starter 26 to latch in (i.e., lock to the on position) when the start button 16 is released. These latching contacts 18 are what keeps the device running after the start button has been released.
  • a momentary (or longer) break in the circuit from power supply source 10 to common return leg 12 by pressing the stop button 14 or by opening any of the safety/process contacts (interlocks) 20, 22, 24 causes the motor control starter coil 26 to de-energize.
  • motor starter 26 de-energizes, the latching contacts 18 fall out (open) .
  • the device will not restart because the latching contacts 18 (which dropped out when the device was shut off) will remain open until the start button 16 is pressed again. This sequence is repeated as necessary to start and stop the device.
  • Fig. 2 is a schematic view of a motor control logic circuit of this invention, illustrating two modifications that may be made to the existing equipment of Fig. 1.
  • the present invention introduces an additional pair of contacts as logic contacts 30 in series with the start button 16 and in parallel with the latching contacts 18. This contact arrangement is unusual since it only blocks the device from starting. It does not (unlike the safety/process interlocks) stop the device once it is running. Process/safety interlocks must stop the device in the fail mode, both from running as well as to prevent the device from starting, and are installed in series with the main logic circuit leg as described supra.
  • These logic contacts 30 function as and will usually be normally open style, but could be physically normally closed style if logic conditions require it. Contacts 30 could be physically placed anywhere in the circuit, but logic will force the contacts 30 to behave as if placed where shown. They will never stop running equipment from running; they will only prevent stopped equipment from restarting.
  • secondary relay coil 32 is a supplement to the motor start coil 26.
  • the motor start coil 26 rarely has spare contacts.
  • This new relay coil 32 merely expands the motor starter's contact capacity by two or more additional pairs of contacts. It is active when the motor is on. It closes the new logic contacts 30 and opens the motor status contacts 50 (described and illustrated in conjunction with Fig. 3, infra) when the motor comes on. It reverses the action when the motor drops out .
  • a possible concern of management is that, during retrofit installation of the inventive apparatus, any kind of tinkering might shut the production down.
  • manual bypass contacts (not shown) can be temporarily installed to bypass the contacts 30 and keep all stations running until the system has been debugged.
  • Fig. 3 is a schematic view of the conceptual logic external to the existing equipment, and includes the following components:
  • Decision Device 40 This may be either a PC (personal computer) or a PLC (programmable logic controller), depending on the situational needs.
  • Permissive coil 42 This coil closes the new logic contacts 30 installed in the existing equipment to allow the motor to start. Permissive coil 42 can also be used to close the status indicator contacts 46, infra.
  • Decision Device Contacts 44 When the decision device 40 is satisfied with the downtime cause input via keypad 52, it closes decision device contacts 44 to activate (start) the permissive coil 42. As soon as the motor stops, motor status contacts 50 advise the decision device 40 that the motor is down, and the decision device 40 opens these contacts 44.
  • Status Indicator Contacts 46 These contacts activate the status circuit. They are typically normally open style contacts as shown. They are controlled by the decision device 40 (for logic) and the permissive coil 42 (for hardware) .
  • Status Condition 48 This can be as simple as an indicator light (as shown) , and/or as sophisticated as a displayed message on a monitor or computer screen. It advises the operator that the inventive circuit has been satisfied, and the equipment is ready to go if everything else has been satisfied. It can be activated either by the status indicator contacts 46, or else directly from the decision device 40 itself.
  • Motor Status Contacts 50 These contacts are physically closed when the motor is running, and open when the motor stops. They can be normally closed style (as shown) or normally open style as long as the action is consistent with the logic.
  • This MMI (man to machine interface) allows the operator to provide the required data.
  • Data is input by an operator via keypad 52 (or any other appropriate input means, such as touch-screen keypad, voice recognition, etc.).
  • the data represents a codified or real description for the cause of an existing downtime.
  • the input data is screened by electronic logic system 40 for acceptability. If rejected, the input data entered at the keypad may be cleared and new data entered. If the downtime event is of long duration logic allows multiple causes to be assigned proportionately to the downtime interval .
  • Permissive coil 42 may include a pair of contacts 30 (Fig. 2) that close so the device start button 16 can operate when pressed, and a third pair of normally open contacts 46 that close to energize permissive indicator 48 (by light or displayed message) .
  • the logic coil circuit can be completely software-based, hardware-based, or a mixture of hardware and software. Other related data can be entered as appropriate, e.g., at the start of the day, at the start of the batch, as employees change, or as keyed to process changes .
  • one digit can be used at the keyboard 52 input to the electronic logic system 40 to indicate input cause of downtime data.
  • the inventive system thus provides a flip/flop circuit that mandates that a downtime entry be given in order to restart the device. Restarting the device clears out the downtime entry from being reused. Stopping the device requires another downtime entry in order to restart the device.
  • All the downtime duration data and causes, along with related data, may be gathered and sorted as per filter screens of a spreadsheet. Then this data may be tabulated and displayed in an appropriate database or spreadsheet, such as EXCEL 97, SQL or ACCESS.
  • Typical of an information system there are three basic subdivisions. There is an input package, a transmission package and an output package. Since these packages may be utilized by various clients in various industries, no two systems will be identical. However, within each subdivision there are similarities.
  • Existing equipment will generally be modified to include one extra set of permissive contacts to start each piece of equipment. The contacts will latch and stay latched until the equipment stops running by any means previously used to stop it, and then the latching logic will drop out. Other modifications may be necessary to gather additional data requested by the client (such as rates of operation, station step, etc.). However, they may follow a generalized program as described next, but custom-tailored to each need.
  • Start Boxes Each "Monitored Piece of Equipment", also known as a "Unit Operation", will be referred to as a "Station” for the balance of this system description.
  • Each station will receive a minimum modification, consisting of insertion of an additional pair of permissive contacts and feedback from the station starter confirming start-up.
  • a new “Start Box” is connected to the "Input Data Gathering Base”, both of which are totally independent of the client's existing system.
  • PC's can be modified to have a touch screen. Touching an area of the screen that looks like a button or other mnemonic image can often allow faster data flow. Voice recognition is an even more elegant choice when a hands-free input is needed.
  • PLC's programmable logic controllers
  • PLC's are commercially available devices from Allen
  • the PLC's are expected to be remote from their Start Boxes and would generally be expected to process data from multiple Start Boxes.
  • the Start Box for PLC driven stations will typically consist of a keypad and brief display screen.
  • a client may request that production rates or other information be tagged to the downtime data. This will likely require other modifications to the existing equipment to intercept this information most conveniently for the operator. Other custom modifications may be required to meet individual customer requirements as they arise.
  • each station Built into each station will typically be its identity. It will reside in its Input Data Gathering Base (IDGB) . All data gathered from each of these stations will be tagged with the station identification. All downtime data will be later dividable into the tagged categories for sorting by tagged categories. Station identification will be built-in and will require no operator input .
  • IDGB Input Data Gathering Base
  • the next prompt is for lot number. After checking for acceptance the standard program will query for an "Are you sure?" response from the operator if the lot number is not running sequentially with the previous numbers .
  • the last prompt is for the cause of the existing downtime, which at the beginning of the day is typically the code for: "Planned/Overnight.” Pressing the Start Button now will start the equipment. The IDGB permissive contacts will remain latched and the station will remain running as multiple employees come and go (as long as at least one remains logged on) , and lot numbers may change without shutting down (if this is consistent with client-company policy) .
  • the IDGB detaches the run-enable mode and starts logging (off) downtime.
  • the operator must enter a cause for the stoppage before the equipment can restart.
  • the IDGB will verify the legitimacy of the entry and latch for restart.
  • allowance can be made for custom messages to be typed in downtime. Multiple entries for downtime causes are allowed, but the mandate is: at least one must be entered in order to continue .
  • Corrections to downtime causes may be typed in and transmitted to the IDGB prior to restarting. Once restarted the original data is erasable, but displayed in a modified font.
  • the IDGB calculates the time interval that the station was down (alternatively, the differential time interval can be calculated on the spreadsheet or database processor) . It also subdivides this interval by any other changes (staffing, etc.) that occurred during the downtime interval. All of this data is keyed to the start of the downtime and stored in the IDGB for transmission to a central data base. An exception for restart blockages will be allowed in the set-up and related modes so as not to impede the set-up process. Appropriate limitations will prevent abuse of this bypass.
  • a burst-mode transmission system functions as follows: Triggered by real clock time, midnight for example, all of the data that has been accumulated in the IDGB will be transferred to a storage disk for permanent filing and a duplicate will be sent to the Master Output Spreadsheet/Database Processor (s) .
  • a dynamic transmission system functions on-the- fly as follows: Conversely, the trigger may merely be a change of state at the IDGB if the output is used as the workhorse for data manipulation and/or the IDGB's memory is limited.
  • the LAN may split the output load into segments for output processing by more than one Output Spreadsheet/Database Processor (OSDP) .
  • OSDP Output Spreadsheet/Database Processor
  • the LAN will confirm the validity of the transmission, then stagger-erase (cascade disappearing data by holding it until verification of valid receipt before erasing the oldest data) . After the LAN is satisfied it will command the local IDGB's to clear and reset their input logs. It will also command the OSDP(s) to start processing. The LAN will make one last confirmation of the IDGB instructions to confirm proper erasure and performance, and then it will go back to sleep. In other words, each time data is transmitted, it will be checked for valid transmission before erasing, and the data at the output will be recorded on tape or equivalent for a permanent record.
  • OSDP Output Spreadsheet/Database Processor
  • OSDP Output Spreadsheet/Database Processor
  • OSDP is a commercially available spreadsheet preprogrammed with macros and other software as needed to receive the transmitted input data, sort and organize it into a master format, and print these reports on a prescheduled time frame. Additionally, the structure can be organized so that sorting of downtime data can be presented in any tag priority sorting, on any time basis (capacity allowing) .
  • Modem ports (controlled by the client) may allow remote troubleshooting of future problems that may occur to help the client reduce their maintenance costs of this system.
  • Benefits of the inventive method and system include: 1. Prior art downtime reports, such as they exist, do not segregate planned downtime from unplanned downtime. The present invention separates planned and unplanned downtime (based on the cause) .
  • the causes for downtime come from operator recollections and/or scouring over cryptic batch notations such as they exist. This is after- the- fact data.
  • the present invention couples entry of a downtime cause with blockage of restarting the device, and forces collection of timely (more accurate) data.
  • Data entry can be as fast as a one key entry (for 0 through 8 general causes, 9 preferably being reserved for other data) for minimal delay of production resumption.
  • Speed of data entry is important in that slow complicated data entries reduce the reliability of the data and extend the downtime by delaying restart of the device.
  • the data entry format although geared for speed, can be quickly modified in the field at the electronic logic system for more detailed (e.g., expanded digit or narrative text) entries for trouble shooting when warranted.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing And Monitoring For Control Systems (AREA)
  • Control By Computers (AREA)

Abstract

L'invention concerne un procédé et un dispositif (40) permettant de collecter des données relative au temps d'arrêt d'un équipement de fabrication. Ce procédé et ce dispositif bloquent (42, 44) électriquement la reprise de la production jusqu'à ce qu'une raison acceptable, fournie par un code ou par une identification directe (46) ait été entrée ou reconnue par un système (40) logique électronique. Le verrouillage de la fonction de redémarrage jusqu'à ce que la cause de l'interruption ait été entrée permet d'assurer un enregistrement rapide des causes des interruptions. La collecte et l'enregistrement de ces données permettent de mesurer le temps de fonctionnement perdu pour un équipement et d'établir des explications pour ce temps perdu. L'invention permet également la collecte d'autres données connexes.
PCT/US1999/014371 1999-06-25 1999-06-25 Collecte de donnees relatives au temps d'interruption de production WO2001009723A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU47186/99A AU4718699A (en) 1999-06-25 1999-06-25 Collecting manufacturing equipment downtime data
CA002356304A CA2356304A1 (fr) 1999-06-25 1999-06-25 Collecte de donnees relatives au temps d'interruption de production
MXPA01006724A MXPA01006724A (es) 1999-06-25 1999-06-25 Recopilacion de datos de periodos de interrupcion del equipo de fabricacion.
PCT/US1999/014371 WO2001009723A1 (fr) 1999-06-25 1999-06-25 Collecte de donnees relatives au temps d'interruption de production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1999/014371 WO2001009723A1 (fr) 1999-06-25 1999-06-25 Collecte de donnees relatives au temps d'interruption de production

Publications (1)

Publication Number Publication Date
WO2001009723A1 true WO2001009723A1 (fr) 2001-02-08

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PCT/US1999/014371 WO2001009723A1 (fr) 1999-06-25 1999-06-25 Collecte de donnees relatives au temps d'interruption de production

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AU (1) AU4718699A (fr)
CA (1) CA2356304A1 (fr)
MX (1) MXPA01006724A (fr)
WO (1) WO2001009723A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2002071164A2 (fr) * 2001-03-06 2002-09-12 Ingleby (1491) Limited Systeme de recuperation et d'enregistrement d'informations
US7218974B2 (en) 2005-03-29 2007-05-15 Zarpac, Inc. Industrial process data acquisition and analysis
CN111975171A (zh) * 2019-05-22 2020-11-24 伊利诺斯工具制品有限公司 具有未知停机时间禁用的焊接监视系统

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US20200368839A1 (en) * 2019-05-22 2020-11-26 Illinois Tool Works Inc. Weld monitoring systems with unknown downtime disabling
US11400537B2 (en) 2019-09-12 2022-08-02 Illinois Tool Works Inc. System and methods for labeling weld monitoring time periods using machine learning techniques

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Publication number Priority date Publication date Assignee Title
US5052630A (en) * 1990-02-27 1991-10-01 Mac Corporation Method and apparatus to reduce material
US5327349A (en) * 1993-04-15 1994-07-05 Square D Company Method and apparatus for analyzing and recording downtime of a manufacturing process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5052630A (en) * 1990-02-27 1991-10-01 Mac Corporation Method and apparatus to reduce material
US5327349A (en) * 1993-04-15 1994-07-05 Square D Company Method and apparatus for analyzing and recording downtime of a manufacturing process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002071164A2 (fr) * 2001-03-06 2002-09-12 Ingleby (1491) Limited Systeme de recuperation et d'enregistrement d'informations
WO2002071164A3 (fr) * 2001-03-06 2003-05-30 Ingleby 1491 Ltd Systeme de recuperation et d'enregistrement d'informations
US7218974B2 (en) 2005-03-29 2007-05-15 Zarpac, Inc. Industrial process data acquisition and analysis
CN111975171A (zh) * 2019-05-22 2020-11-24 伊利诺斯工具制品有限公司 具有未知停机时间禁用的焊接监视系统

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