Breaking Hammer Usage Rate Measurement via Impact Pause Detection
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Solution Overview
Problem
Existing methods for determining the usage rate of breaking hammers are imprecise, as they rely on impact rates or times, failing to account for loads during non-impact periods, leading to inadequate maintenance planning and premature wear.
Innovation Solution
A method and measuring device that identify and monitor impact pauses between cycles, summing the durations of pauses shorter than a predefined time limit to include them in the usage rate, providing a more comprehensive load analysis and maintenance planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the usage rate is determined based on impact rate or impact time, then the measurement is simpler, but the measurement precision is insufficient because loads during non-impact periods are not accounted for
Solution Approach 1:
The measurement system segments the operation cycle into distinct phases: impact phases and pause phases. By monitoring both phases separately and summing their durations, the system achieves comprehensive usage rate measurement without requiring a completely new complex measurement approach - it builds upon the existing impact detection capability while adding pause detection.
Solution Approach 2:
The system preliminarily defines what constitutes a 'pause' by establishing a time threshold before measurement occurs. Any period shorter than this predefined threshold is automatically classified as a pause and included in the usage rate calculation, enabling the system to handle various pause durations without requiring complex real-time analysis.
2Measurement precision
If the usage rate is determined based on operating hours of the basic machine, then the measurement is easier, but the measurement precision is very imprecise because the breaking hammer is used only part of the time
Solution Approach 1:
The breaking hammer's own operational characteristics (impact generation and pause periods) are used to determine its usage rate. The system monitors the hammer's actual work cycle directly rather than relying on external machine hours, allowing the hammer to self-report its usage through its inherent operational pattern of impacts and pauses.
3Loss of information
If impact pauses are included in the usage rate calculation, then the load analysis becomes more comprehensive, but the calculation complexity increases
Solution Approach 1:
The system merges the measurement of impact phases and pause phases into a single unified usage rate calculation. By combining the duration of impacts and the duration of pauses (those shorter than the threshold) into one cumulative value, the system achieves comprehensive load information without requiring separate complex analysis systems for different operational phases.
Data Source
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AI summary
The invention relates to a method and measuring device for determining the usage rate of a breaking hammer, and to a rock breaking device. The measuring device (10) comprises a sensor (11) for measuring a physical phenomenon caused by the operation of the percussion device (4).The measuring results are processed, and they are used to determine the start and end times of the operation of the percussion device. By means of a timing device (61), it is possible to determine the duration of an impact cycle (IC) which is added to a time counter (62).The durations of impact cycles added cumulatively to the time counter indicate the total percussion time of the breaking hammer. Impact pauses (IP) between impact cycles are also monitored, and pauses shorter than a predefined time limit (tstop2) are taken into account as part of the usage rate.