Mobile Machine Tool Sensor Detection Under Particle Pollution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The detection range of tool sensors in mobile machine tools is often impaired by particles such as chips and dust during machining, leading to degraded signal quality.
Innovation Solution
The implementation of optimization means such as digital signal processing filters, illumination devices, and scavenging air flows to reduce the impact of particles on the tool sensor signal, along with a contamination test means to monitor and adjust for signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the tool sensor detection area is positioned to monitor the workpiece contact area, then the sensor can detect machining processes, but particles such as chips and dust pollute the detection area and degrade signal quality
Solution Approach 1:
The patent extracts and removes particles from the tool sensor detection area using a suction device that creates a negative pressure zone. The suction device selectively removes chips and dust particles from the detection area before they can pollute the sensor, thereby maintaining measurement precision while allowing the sensor to remain positioned for effective machining monitoring.
Solution Approach 2:
The patent introduces an intermediary air flow system between the particle source and the tool sensor. A positive pressure air flow directs particles away from the detection area, while a negative pressure suction system captures and removes particles. This intermediary air flow mechanism protects the sensor from direct particle contact while maintaining the detection area's accessibility for monitoring machining processes.
2Object-affected harmful factors
If scavenging air flow is used to remove particles from the detection area, then particle pollution is reduced, but additional system complexity is introduced
Solution Approach 1:
The patent merges the scavenging air flow system with existing machine tool components. The suction device is integrated into the machine tool's existing air supply system, and the positive and negative pressure zones are coordinated through a unified control mechanism. This integration reduces the additional complexity that would result from completely separate particle removal systems.
Solution Approach 2:
The air flow system serves multiple functions: it cools the tool sensor, removes particles from the detection area, and potentially influences chip evacuation from the machining zone. By designing the particle removal system to perform multiple functions simultaneously, the patent reduces the need for separate dedicated systems, thereby minimizing additional complexity while achieving effective particle pollution reduction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the accuracy and reliability of sensory detection by filtering out interference and maintaining signal quality, enabling better image detection and processing even in polluted conditions.
Implementation Method 1
The digital signal processing means comprises or is formed by at least one digital filter for filtering pixels generated by the particles
Implementation Method 2
The machine tool has an illumination device for illuminating the detection area
Implementation Method 3
scavenging air to flow through the detection area of the tool sensor, for example from a suction flow and/or a cooling air flow
Data Source
Figure 1
Figure 2~5
Figure 6~7
AI summary
The invention relates to a mobile machine tool (10), namely a hand-held or semi-stationary machine tool, for machining a workpiece (W), wherein the machine tool (10) has a guide element (30), in particular a plate-like element, with a guide surface (32) for guiding the machine tool (10) at the workpiece (W) or the workpiece (W) at the machine tool (10), wherein the machine tool (10) has a drive unit (11) with a drive motor (13) for driving a tool holder (14) arranged on the drive unit (11) for receiving a working tool (15), wherein the machine tool (10) has a tool sensor (61, 62) whose detection area (EB1, EB2) is at least partially loaded by particles that are generated when machining a workpiece (W) using the working tool (15).It is provided that the machine tool has at least one optimization device (OPT) to reduce the effect of the particles located in the detection area (EB1, EB2) on a tool sensor signal of the tool sensor (61, 62).