The invention relates to a measuring device comprising a sensor for the high frequency detection of a measurement variable, such as sound, structure-borne noise, current, voltage, optical or magnetic measurement values and the like, with an operator network comprising at least one operator. The invention also relates to an operator network having a notification operator, a machine control operator and/or a difference operator, as well as to the operators. In addition, the invention relates to methods or devices for identifying events in a material-processing and/or material production process on the basis of a multidimensional data stream obtained

A power tool includes a control for the motor of the power tool that senses an operating characteristic of the motor and controls the operation of the power tool based on the sensed characteristic. The sensed characteristic includes variations in reluctance of the motor. A controller may sense changes on load on the motor as a result of interaction between a working element such as a saw blade or drill bit and the work piece. The controlled operation may include variation in speed or torque or both, or may include stopping the motor. Emergency conditions may be sensed by changes in reluctance.

A tool strip mark generator capable of measuring applied force includes: a bottom surface on which at least a portion of a target surface made of a material capable of generating a tool strip mark, which is a tool-scraped stripe, is formed; a rotating member configured to be rotatable in a state of being spaced apart from the bottom surface; a moving member movable on the bottom surface by laterally coupling the rotating member to a coupling portion; a force sensor attached to one side of an outer peripheral surface of the rotating member and sensing force which is applied when a tool strip mark is generated on the target surface by inserting the tool; a measurer configured to measure an output signal of the force sensor and calculate information about the applied force; and a display configured to display information about the applied force calculated by the measurer.

A tool strip mark generator capable of measuring applied force includes: a bottom surface on which at least a portion of a target surface made of a material capable of generating a tool strip mark, which is a tool-scraped stripe, is formed; a rotating member configured to be rotatable in a state of being spaced apart from the bottom surface; a moving member movable on the bottom surface by laterally coupling the rotating member to a coupling portion; a force sensor attached to one side of an outer peripheral surface of the rotating member and sensing force which is applied when a tool strip mark is generated on the target surface by inserting the tool; a measurer configured to measure an output signal of the force sensor and calculate information about the applied force; and a display configured to display information about the applied force calculated by the measurer.

A method for drilling an element to be drilled by a drilling device and a cutting tool including drill margins and cutting edges. The method includes determining at least one load value representing overall drag due to internal friction of the drilling device and to friction of drill margins in the element to be drilled. Determining includes: stopping a drilling operation in progress; partial retraction of the cutting tool on a predetermined distance, the predetermined distance being chosen such that the cutting edges are no longer in contact with the element to be drilled; driving the cutting tool with predetermined cutting parameters; measuring at least one load value during the driving of the cutting tool with the cutting parameters before its cutting edges again come into contact with the element to be drilled and after stabilization of the load values, the measured load value representing the overall drag.

The self-propelled construction machine according to the invention, in particular road-milling machine, recycler, stabiliser or surface miner, comprises a machine frame 2, which is supported by a chassis 1, which has wheels or tracks 1A, 1B. A milling drum 4 is arranged on the machine frame. The wheels or tracks 1A, 1B and the milling drum 4 are driven by a drive unit 8. Furthermore, the construction machine comprises a control unit 19 for controlling the drive unit 8 and a signal-receiving unit 18 for detecting at least one measurement variable M(t) which is characteristic of an operating state of the milling drum 4. The construction machine is characterised in that the rotational speed of the milling drum 4 is adapted, on the basis of at least one measurement variable M(t) which is characteristic of a critical operating state of the milling drum, to the operating conditions of the construction machine in such a way that the milling drum is operated in a non-critical operating state. The adaptive open-loop control of the milling drum rotational speed allows the construction machine to be operated at an optimum operating point with respect to the milling drum rotational speed.

A measuring device comprising a sensor for the high frequency detection of a measurement variable, such as sound, structure-borne noise, current, voltage, optical or magnetic measurement values and the like, with an operator network comprising at least one operator. An operator network that includes a notification operator, a machine control operator and/or a difference operator. The devices can be configured to identify events in a material-processing and/or material production process on the basis of a multidimensional data stream obtained during the process and having temporally resolved frequency and energy information, and to the use of defect patterns and/or event patterns and/or energy data, the data being supplied to a pattern operator or multiple pattern operators arranged in parallel or one after the other.

A method for evaluating tool health with the temperature rising signal, applied to a machine tool that utilizes a tool to perform a removal process upon a workpiece, comprises the steps of: setting a target machining instruction; utilizing a processor to divide the target machining instruction into a residual machining instruction and a micro machining instruction; performing the residual machining instruction; without any coolant or with little coolant, performing the micro machining instruction, and having at least one thermal image sensor to detect a thermal image of a contact area of the tool and the workpiece; having the processor to derive a temperature feature by evaluating the thermal image; and, having the processor to compare the temperature feature with at least one threshold for determining the tool health.

A method for grinding a workpiece with a toothing or a profile, in which, in a single workpiece clamping operation in the grinding machine, the toothing or the profile is pre-machined using a rough-grinding tool in a first step and then the toothing or the profile is finished using a smooth-grinding tool in a second step. Simultaneously with the first working step, the toothing or the profile is measured by at least one sensor, wherein a geometric variable defining the toothing or the profile or a variable linked to the geometry is measured, and wherein the deviation of the measured geometric variable or of the variable linked to the geometry is determined from a target value in the machine control.

A method for confirming cutting tool's location includes: a position calculation unit basing on plural sleeve positions in a tool magazine to train and obtain training posture data and training signal strength data of each the sleeve position; and the position calculation unit sending a tool call command to move a target cutting tool among the cutting tool to a tool exchange position. The latter step includes: obtaining a posture data and a signal strength data of the target cutting tool; based on the posture data and the signal strength data, the position calculation unit comparing the training posture data and the training signal strength data to confirm a target sleeve location of the target cutting tool; and, rotating the tool magazine to move the target cutting tool from the target sleeve location to the tool exchange position. In addition, a machine system using the method is also provided.