Power tool for processing a substrate and method for analyzing a composition of the substrate

Abstract

A power tool for processing a substrate, the power tool being designed for analyzing a composition of the substrate and including at least one recorder for recording an operating parameter of the power tool. A method for analyzing a composition of a substrate that is being processed by a proposed power tool is also provided. The analysis of the composition of the substrate takes place on the basis of the at least one recorded operating parameter which is recorded with the recording means, the analysis being performed in the power tool itself and during its operation.

Claims

1-13. (canceled)

14. A power tool for processing a substrate and designed for analyzing a composition of the substrate, the power tool comprising: at least one recorder for recording an operating parameter of the power tool, an analysis of the composition of the substrate taking place on the basis of the at least one recorded operating parameter, the analysis being performed in the power tool itself and during operation of the power tool.

15. The power tool as recited in claim 14 further comprising storage means for storing the at least one operating parameter and results of the analysis.

16. The power tool as recited in claim 14 further comprising a display for displaying the at least one operating parameter and the results of the analysis.

17. The power tool as recited in claim 14 further comprising control electronics for evaluating or storing the at least one operating parameter and the results of the analysis.

18. The power tool as recited in claim 14 further comprising a transmitter for transmitting the at least one operating parameter and results of the analysis.

19. A method for analyzing a composition of a substrate being processed by the power tool as recited in claim 14, the method comprising: a) providing the power tool; b) operating the power tool and processing of a substrate; c) recording the at least one operating parameter of the power tool with the recorder; and d) analysis of the composition of the substrate on the basis of the at least one recorded operating parameter, the analysis being performed in the power tool itself and during operation of the power tool.

20. The method as recited in claim 19 wherein the recorded operating parameters are summarized in a work log.

21. The method as recited in claim 20 wherein the work log can be stored in control electronics of the power tool or in an external device.

22. The method as recited in claim 20 wherein the analysis includes a decision tree model.

23. The method as recited in claim 20 wherein includes an examination of features of the at least one recorded operating parameter, with properties of the at least one recorded operating parameter being examined.

24. The method as recited in claim 20 wherein the properties are statistical properties.

25. The method as recited in claim 20 wherein the analysis includes a sliding window analysis.

26. The method as recited in claim 20 wherein the analysis includes a cumulative sum analysis.

27. The method as recited in claim 20 wherein an accuracy of the analysis is improved by training the power too, the training including a comparison between composition data that are determined by the methods and composition data of materials with a known composition.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In the FIGURE, the same and similar components are numbered with the same reference signs. In the FIGURE:

[0077] FIG. 1 shows a view of a preferred configuration of the invention

DETAILED DESCRIPTION

[0078] FIG. 1 shows a preferred embodiment of the power tool 1. In particular, FIG. 1 shows a power tool 1 which, in the exemplary embodiment of FIG. 1, is formed by a core drilling device. The power tool 1 may also be formed by a saw. The power tool 1 shown in FIG. 1 may form a drilling system together with an automatic feed device (without reference sign). At least one recording means 4, which is set up to record operating parameters of the power tool 1, may be present on the power tool 1. The power tool 1 is designed to analyze a composition of the substrate 2 to be processed, the power tool 1 comprising at least one recording means 4 for recording an operating parameter of the power tool 1. The analysis of the composition of the substrate 2 takes place on the basis of the at least one recorded operating parameter, the analysis being carried out within the power tool 1 itself and during the operation of the power tool 1. For this purpose, the power tool 1 may comprise control electronics and/or an evaluation unit (shown solely schematically as 10), and storage 9 and transmitter 11 for the operating parameter discussed above (shown solely schematically).

[0079] The power tool 1 may also comprise more than one recording means 4. These further recording means are identified in FIG. 1 by the reference sign 7. The recording means 4, 7 shown in FIG. 1 are schematic representations that indicate possible positions of the recording means 4, 7 on the power tool 1. However, many other positions for the recording means 4, 7 are also conceivable. The recorded operating parameters may be evaluated, preferably with the aim of identifying a reinforcement hit 3, for example if an operating parameter changes rapidly. In the context of the invention, continuous recording of the operating parameters is preferred in particular.

[0080] The power tool 1 can be used to process a substrate 2. The analysis of the composition of this substrate 2 is the subject of the proposed method. The processing of the substrate 2 may preferably take place by an essentially cylindrical drill core being cut out of the substrate 2 in order for example to lay a cable duct therein. A reinforcement hit 3 occurs when the tool of the power tool 1 hits a rebar, a reinforcing rod, a ferrous water pipe or the like during the processing operation. If the power tool 1 is designed as a core drilling device, the drill bit may for example hit the rebar or the reinforcing rod. If the power tool 1 is designed as a wall or concrete saw, for example the saw blade as the tool of the power tool 1 may hit the rebar or the reinforcing rod. Such a reinforcement hit 3 may be recognized particularly quickly and reliably by an exemplary embodiment of the invention through the recording and evaluation of operating parameters of the power tool 1, in that a rapid change in an operating parameter is viewed as a reinforcement hit 3. In other words, it may be established in the context of the present invention that there is a rapid rise or fall in an operating parameter of the power tool 1, such a rapid rise or fall in an operating parameter being associated with a reinforcement hit 3 in the context of the invention.

[0081] The operating parameters that are recorded and evaluated in the context of the invention may be distances, speeds, rotational speeds, current and voltage values, forces and torques, vibration values and the like. Accordingly, the recording means 4, 7 may be distance or length meters, speed meters, tachometers, current or voltage measuring devices, torque measuring devices or vibration measuring devices, without being restricted thereto.

[0082] It may however also be preferred in the sense of the invention that the power tool 1 comprises a control and evaluation unit in which the evaluation of the operating parameters recorded by the recording means 4, 7 can take place. It may be preferred in the sense of the invention that, in the evaluation for the recognition of the reinforcement hits 3, access is also made to data that are available to the control and evaluation unit from a different context. It represents a particular synergistic advantage of the invention that already existing data relating to the operating parameters of the power tool 1 can be taken into account in the evaluation and recognition of reinforcement hits 3 and can be evaluated with one another.

[0083] If a reinforcement hit 3 is recognized, it is preferred in the sense of the invention that the drilling operation of the power tool 1 can be stopped immediately. The preferred instantaneous stopping of the motor 5 of the power tool 1 gives the user of the core drilling device 1 time to decide how to deal with the reinforcement hit 3. It may be preferred for example that the drilling operation is interrupted at the location of the reinforcement hit 3 and continued at another location. However, it may also be preferred that the drilling operation is continued despite the reinforcement hit 3.

[0084] It may preferably be displayed on a display device 8 that a reinforcement hit 3 has been detected. The display devices 8 may for example be arranged on the power tool 1. In FIG. 1, possible positions for the display device 8 on the power tool 1 are shown. However, many other positions for the display device 8 are also conceivable.

LIST OF REFERENCE SIGNS

[0085] 1 Power tool [0086] 2 Substrate [0087] 3 Reinforcement hit [0088] 4 Recording means [0089] 5 Motor of the power tool [0090] 7 Further recording means [0091] 8 Display device [0092] 9 Storage [0093] 10 Control electronics and/or an evaluation unit [0094] 11 Communication means