DE102005051452A1 - Maintenance point of time determination method for e.g. machine, involves computing prognostic prospective process of data using load data which is stored along with failure messages, where failure message leads to direct alerting - Google Patents

Abstract

The method involves detecting the individual wear-related operating parameters of a machine (1) by a sensor (2) and evaluating the parameters if required. The evaluated or quantified parameters are stored with time-date information. A prognostic prospective characteristic of the data is computed with the help of the load data which is stored along with the failure messages, where the failure message leads to a direct alerting. An independent claim is also included for a device for automatic determination of the maintenance point of time in a machine and an equipment.

Description

The The invention relates to a method and a device for automatic determination of maintenance times on machines and Installations, whereby individual wear-related operating parameters recorded and quantified or evaluated

In EP-1136201 describes a method and a device, in the case of a cutting machine measuring devices machine operating parameters then quantify, sum and with a maximum value be compared. If the maximum value is exceeded, alarmed an indication of the operator who has to perform maintenance.

In DE-19709445 describes an apparatus and a method, which in a motor vehicle by means of sensors wear-influencing Operating parameters recorded. These operating parameters are then quantified evaluated, summed and using a comparator with a threshold compared, wherein when exceeding the Threshold a signal is generated that provides the necessary service displays.

adversely in the known solutions is a missing information or overview with regard to coming Maintenance times in the future, with a major problem of the known solutions This is because the machine operator is often surprising and unprepared with the display of suddenly necessary machine maintenance is confronted.

outgoing from this prior art, the invention has the object and the technical problem underlying a method and a device to improve the determination of machine maintenance times or create facilities.

These The object is achieved by the Characteristics of the independent claims 1 and 6 solved. Further advantageous embodiments of the invention will become apparent from the dependent claims.

The Invention is based on the idea that in machines or Plants recorded and evaluated wear-related operating parameters to store in their time sequence and therefrom, e.g. with help an extrapolation, a predicted further course of this To calculate data. These forecasted data will then come with a Time variables are calculated and thus maintenance times are determined, that lie in the future.

Of the Advantage of the invention is in particular that by the maintenance work required in the future can be planned and calculated on the machines or systems. often maintenance is associated with machine downtime, this being better planned by the maintenance times displayed in the future can be reduced and thus production downtime or costs are reduced can.

Further Details and advantages of the invention will become apparent from the following description of several embodiments, and by reference the drawings.

In a preferred embodiment be in a machine or plant operating parameters in certain Time series associated with wear, e.g. Spindle speed. These collected data are digitized as needed, quantified or evaluated and with a time date information permanently saved. With the help of an extrapolation procedure will be the timing of this load data in the future predicts. By offsetting this forecasted data with a time variable future maintenance times are determined and a machine operator or service personnel.

The Drawings show in

1 a schematic representation of the invention with a machine,

2 a schematic representation of a linear extrapolation method with predicted maintenance times in the future,

3 a schematic representation of how, for example, forecast maintenance times are displayed on a display.

In 1 is a machine ( 1 ), in which one or more wear-related operating parameters, eg oil temperature, are detected by means of sensors ( 2 ). These sensor signals are indicative of a load on machine components. The sensor signals are then sent to an electronic functional unit ( 3 ) and evaluated, for example, with a linear or nonlinear function. This quantified load data is then compared with the time and date information provided to a real-time clock ( 4 ) in a nonvolatile memory ( 5 ) saved. A programmable arithmetic unit ( 6 ) who continuously expends this stored data and uses an extrapolation program to calculate the further course of this data into the future. Based on this forecasted data, the arithmetic unit determines ( 6 ) with another program future maintenance times, which then with the help of a display ( 8th ) being represented. Is a maintenance of the machine ( 1 ), a control unit ( 7 ) the associated information with time reference in memory ( 5 ), so that this for the determination of future maintenance times by the computing unit ( 6 ) can be taken into account.

Often a machine ( 1 ) has its own machine control in the form of a programmable PLC or industrial PC, so that it is obvious, certain functional units, such as the computing unit ( 6 ) to realize by appropriate programs within this machine control and thus to use existing hardware. This also applies to sensors that are already present on the machine.

The 2 shows from a present moment ( 9 ) from a past history ( 10 ) and a linearly extrapolated course to the future ( 11 ) of a quantified operating parameter ( 12 ) at. On the timeline ( 13 ) are a past ( 14 ) and two predicted future maintenance times ( 15 . 16 ).

In 3 an example of a display for the machine operator or service personnel is shown. For example, here, starting from a current month of November, on a display ( 8th ) indicates that maintenance with A and B maintenance will be required in the coming January, and maintenance with measures B and C is planned for next March.

Further embodiments are conceivable, in particular the choice of wear-related Operating parameters according to utilization and operating time of the machine. You can do this also linked several sensor signals be, e.g. Spindle speed, motor current and oil temperature to a certain Maintenance type, such as Engine maintenance, to charge. wear-related extreme events, such as Engine overheating, preferably run to a direct alert.

Also can retrofitted with the invention existing machinery and equipment and be freely programmed by the user. This is the manufacturer's information the basis for programming, by empirical values of the machine user added can be.

A alternative design forms compatible interfaces, especially computer interfaces, so that the invention as a single device or in combination, in particular networked, can be operated. A central computer could e.g. over one Ethernet port can be connected, whereas a service technician with a notebook, e.g. above a USB interface, could communicate. Also a radio connection, e.g. by means of a GSM module, is conceivable. By the possibility Networking is a remote inquiry of the system, even across borders away, easily and at any time, e.g. through internet or telephone. This can be the monitoring more extensive and partly over several locations distributed machine and plant parks over one central control center. Next, the invention is also suitable for monitoring of facilities operated without human resources or service centers, the nationwide service assignments and emergency messages, e.g. for elevator systems, plan and coordinate.

Becomes the system used in security areas, there is the option that the system is in regular, definable intervals At the central office reports and thus its functionality clearly documented. This allows a system failure to be detected early.

Next the machine retrofitting The invention can also be used by machine manufacturers as standard equipment be installed in machinery and equipment.

In a machine park would be by the invention a uniform, compatible and networkable solution possible and advantageous, so that several machines could be managed centrally.

By the storage of the load data and the maintenance measures it is e.g. the type of machine, capacity utilization, overloads, especially power surges, and performing maintenance check to in case of warranty if necessary draw conclusions.

in this connection does it make sense to include multiple password levels to ensure this? can be that e.g. Service provisions, or system programming only by the respective authorized personnel carried out can be. Next there are legitimate Persons the opportunity certain activities and events by means of a notebook or a keyboard in an electronic Logbook.

1

machine or attachment

2

sensor

3

electronic Function unit for quantification

4

Real Time Clock

5

nonvolatile Storage

6

computer unit

7

control unit

8th

display

9

current time

10

saved Stress data

11

forecasted Stress data

12

quantified operating parameters

13

timeline

14

Maintenance time in the past

15

Maintenance time in the future

16

Maintenance time in the future

Even though the present invention described by means of embodiments was, is for Professionals in the field recognize that there are various changes and modifications can be made without the thought of Deviate from the invention. Such changes and modifications are intended to be within the scope of the following claims.

Claims (14)

Method for the automatic determination of maintenance times in machines and installations, wherein individual wear-related operating parameters are recorded and optionally quantified or evaluated, characterized in that the recorded and possibly quantified or evaluated operating parameters are permanently stored with a time-date information and with the aid of this stored load Data a predicted future course of the data is calculated, with a calculation with a time variable at least one maintenance time point, which is in the future, is determined. Method according to claim 1, characterized in that that also event-related data, in particular extreme load data, as well as fault messages be stored, with fault messages too lead to a direct alert. Method according to claim 1 or 2, characterized that the projected future course load data by linear or non-linear extrapolation is calculated. Method according to at least one of claims 1 to 3, characterized in that with the determined future Maintenance times and the type of maintenance is specified. Method according to at least one of claims 1 to 4, characterized in that an effected maintenance with the respective Time is saved and then the next future maintenance times be determined. Device for automatic determination of machine maintenance times ( 1 ) and installations, whereby individual wear-related operating parameters are determined by sensors ( 2 ) and, where appropriate, by an electronic functional unit ( 3 ) are quantified or evaluated, characterized in that the acquired and optionally quantified or evaluated operating parameters are stored permanently in a non-volatile memory ( 5 ) with a time-date information that is provided by a real-time clock ( 4 ) and stored using this stored load data ( 10 ) a forecasted future course ( 11 ) of the data by means of a programmable arithmetic unit ( 6 ) is calculated, with a calculation with a time variable by the arithmetic unit ( 6 ) at least one maintenance time ( 15 ), which lies in the future. Apparatus according to claim 6, characterized in that also event-related, in particular extreme load data, such as current peaks, in memory ( 5 ) and this regardless of a time-cyclic sampling. Apparatus according to claim 6 or 7, characterized in that the arithmetic unit ( 6 ) has an extrapolation program, with which the prognosticated future course ( 11 ) of the load data is calculated. Device according to at least one of claims 6 to 8, characterized in that the functional sequences, such as storage of data, between the functional units ( 3 . 4 . 5 . 6 ) by a programmable controller ( 7 ). Device according to at least one of claims 6 to 9, characterized in that a maintenance performed by a signal to the control unit ( 7 ) and with the respective time date that the real-time clock ( 4 ) is stored in the nonvolatile memory ( 5 ) and then using the arithmetic unit ( 6 ) the next future maintenance times ( 12 ) be determined. Device according to at least one of claims 6 to 10, characterized in that one or more functional units ( 6 . 7 within egg ner machine or plant control, in particular PLC or industrial PC, can be realized by appropriate Pogramme, the hardware of the machine or plant control is used. Device according to at least one of claims 6 to 11, characterized in that at least one interface, especially a computer interface, so that e.g. connected to a network, a central computer or a notebook can be. Device according to claim 12, characterized in that that the interface consists of a radio interface, in particular GSM module, or an internet or telephone interface, so that a remote inquiry or remote monitoring of the system is possible. Device according to at least one of claims 6 to 13, characterized in that a representation of the predicted maintenance times ( 15 ) on a display ( 8th ) and / or a central computer monitor and / or a notebook monitor and / or a paper print out.