Material Testing Machine Cable Disconnection Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing material testing machines cannot detect cable disconnection during measurement, leading to delayed user notification and potential waste of test pieces and time, as the disconnection detection circuit operates separately from the measurement circuit, preventing simultaneous operation.
Innovation Solution
Incorporating a detection circuit within the control device that extracts and compares resistance and capacitive components from the measurement signal to detect cable disconnection, allowing for real-time warning display without the need for a separate abnormality detection circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate disconnection detection circuit is used, then cable disconnection can be detected, but the detection circuit and measurement circuit cannot operate simultaneously, preventing real-time detection during measurement
Solution Approach 1:
The patent combines the disconnection detection function with the existing measurement circuit by adding a capacitive component extraction unit and comparator to the measurement circuit. This allows the measurement circuit to perform both measurement and disconnection detection functions simultaneously, eliminating the need for a separate detection circuit and enabling real-time monitoring during measurement operations.
Solution Approach 2:
The measurement circuit is enhanced to serve multiple functions: it continues to perform its original measurement function while simultaneously detecting cable disconnection by extracting and comparing capacitive components. This multi-functionality allows a single circuit to handle both measurement and abnormality detection without requiring separate dedicated circuits.
2Reliability
If switching between measurement circuit and disconnection detection circuit is implemented, then cable disconnection can be detected, but detection cannot occur during measurement, causing delay in user notification
Solution Approach 1:
The patent enables continuous operation of the measurement circuit for both measurement and disconnection detection simultaneously. The capacitive component extraction and comparison operations run continuously alongside measurement operations, ensuring that cable disconnection can be detected at any moment without interrupting or delaying the measurement process, thus providing immediate notification to users.
3Reliability
If a separate abnormality detection device is added, then cable disconnection can be detected, but the system complexity increases and real-time monitoring during measurement is prevented
Solution Approach 1:
Instead of adding a separate abnormality detection device, the patent integrates the detection functionality into the existing measurement circuit by incorporating a capacitive component extraction unit and comparator. This integration approach maintains reliability while avoiding the increased system complexity that would result from adding independent detection hardware.
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
Enables continuous detection of cable disconnection during measurement, providing timely warnings and preventing unnecessary test continuation, thus saving test pieces and time by integrating disconnection detection into the measurement circuit.
Implementation Method 1
a detection circuit which extracts a capacitive component due to electrostatic capacitance of the cable from a measurement signal from the detector
Data Source
Figure 1
Figure 2
Figure 3
AI summary
There is provided a material testing machine that a control device (20) of the material testing machine includes a detection circuit (41) which extracts a resistance component (A) caused by the physical quantity and a capacitive component (B) caused by an electrostatic capacitance of the cable (CL) from a measurement signal from the detector, a memory element (35) which stores a normal capacitive component (BN) extracted by the detection circuit (41), and a comparator (47) which compares the current capacitive component (B) extracted by the detection circuit (41) with the normal capacitive component (BN), and when a comparison result from the comparator (47) indicates that a value of the current capacitive component (B) varies beyond a predetermined allowable range with respect to the normal capacitive component (BN), it is treated that the cable (CL) is disconnected, and a disconnection warning is provided.