Parallel Connection Testing Device for Intermittent Impedance Detection
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Solution Overview
Problem
Conventional connection testing devices are inefficient and costly when checking for intermittent impedance changes in multiple lines, often requiring expensive precision measuring devices and sequential testing via switching matrices, making them time-consuming and impractical for large cable harnesses.
Innovation Solution
A connection testing device utilizing multiple transmitters and receivers to test lines in parallel, employing an RC element and evaluation logic with comparators to detect impedance changes without expensive equipment, and using identification signals to differentiate between test signals, allowing for simultaneous and cost-effective testing of dynamic impedance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional connection testers are used to check intermittent impedance changes in multiple lines, then measurement precision can be maintained, but testing time increases significantly and productivity decreases
Solution Approach 1:
The system divides the testing task into multiple independent parallel channels, each with its own transmitter and receiver. Instead of sequentially testing one line at a time through a switching matrix, multiple lines are tested simultaneously in parallel segments, dramatically reducing total testing time while maintaining precision for each individual line measurement.
Solution Approach 2:
The invention transitions from one-dimensional sequential testing to multi-dimensional parallel testing by adding spatial dimensionality. Multiple transmitters and receivers operate simultaneously on different lines, converting a time-consuming sequential process into a concurrent multi-line testing system that achieves both high precision and high productivity.
2Measurement precision
If expensive precision measuring devices and switching matrices are used for sequential testing, then measurement accuracy is maintained, but device complexity and cost increase
Solution Approach 1:
The invention extracts and eliminates the complex switching matrix from the test system. Instead of using a centralized switching mechanism to route test signals through one line at a time, the system directly connects multiple transmitters to multiple lines in parallel, removing the switching complexity while maintaining the ability to test multiple lines simultaneously with comparable precision.
Solution Approach 2:
The system uses multiple copies of simple transmitter-receiver pairs instead of one complex precision measuring device with switching capabilities. Each transmitter-receiver pair is a simplified unit that can independently test one line, and multiple copies operate in parallel to achieve the same overall testing capability as a single complex system would provide sequentially.
3Productivity
If multiple transmitters and receivers are used for parallel testing, then productivity and testing speed improve, but device complexity increases
Solution Approach 1:
The invention uses multiple simple, identical transmitter and receiver units instead of one complex precision instrument. Each transmitter-receiver pair is a standardized, relatively simple module that can be replicated. The complexity is distributed across multiple identical units rather than concentrated in a single complex device, making the system easier to manufacture, maintain, and scale.
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 rapid and cost-effective detection of intermittent impedance changes in multiple lines without expensive precision measuring devices, reducing testing time and improving efficiency in identifying errors such as interruptions and short circuits within cable harnesses.
Implementation Method 1
a test signal generator (106), which generates a test signal
Implementation Method 2
a receiver input circuit (114), which converts an input current signal into an input voltage
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A method (200) and a continuity tester (100; 300) for testing intermittent impedance changes in a first and/or second line (110; 302, 334) are described. The continuity tester (100; 300) comprises a transmitter (102; 308) with a test signal generator (106) for generating a test signal and a first test point (108; 304) for connecting the first (110; 302) or second line (334), wherein the test signal generator (106) supplies the test signal to the first (110; 302) or second line (334) via the first test point (108; 304). Furthermore, the junction test device (100; 300) comprises a first receiver (104; 310) with a second test point (112; 306, 336) for connecting the first (110; 302) or second line (334) and a receiver input circuit (114; 326, 328) which receives a received signal from the first (110; 302) or second line (334) via the second test point (112; 306, 336).The junction tester (100; 300) also has an evaluation logic (116) which is connected to the receiver input circuit (114; 326, 328) and which compares the input signal with a threshold value in order to detect an intermittent impedance change in the first (110; 302) and/or second line (334).