Probe with Switchover Device for Dynamic Voltage Divider Adjustment
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Solution Overview
Problem
Existing high-voltage probes require frequent changes when measuring across a wide range of frequencies from direct current to high-frequency alternating currents, and they are not precise for low voltages due to their design, which limits their versatility and accuracy.
Innovation Solution
A probe with a switchover device that allows for rapid and flexible adjustment of probe tips to connect to an electrical waveguide, enabling measurement across a broad frequency and voltage range with reduced loading on the circuit to be measured, and automatic scaling of display values through integrated identification resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-voltage probe with fixed division ratio is used, then high-frequency measurement capability is achieved, but measurement precision for low voltages deteriorates
Solution Approach 1:
The patent implements a switchable voltage divider circuit that allows dynamic changing of the division ratio between different measurement ranges (e.g., 10:1, 100:1, 1000:1). This enables the probe to adapt its attenuation factor based on the signal level being measured, thereby maintaining measurement precision across both low and high voltage ranges while preserving high-frequency capability.
Solution Approach 2:
The probe incorporates multiple voltage divider configurations with different division ratios that can be selected based on the measurement requirements. By changing the electrical parameter (division ratio) rather than the physical probe structure, the system achieves both high-frequency performance and accurate low-voltage measurement capability.
2Measurement precision
If multiple probes are used to cover different voltage ranges, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent designs a single probe that performs multiple measurement functions by incorporating switchable voltage divider ratios. The probe can measure both low voltages (e.g., 1V) and high voltages (e.g., 1000V) with appropriate precision, eliminating the need for multiple specialized probes while maintaining measurement accuracy across all ranges.
Solution Approach 2:
Multiple voltage divider circuits with different division ratios are merged into a single probe structure with a common input and output. The switchable configuration allows seamless transition between different measurement ranges, combining the functionality of multiple probes into one unified device.
3Adaptability or versatility
If series resistors are plugged on manually for different measurement ranges, then measurement flexibility is achieved, but ease of operation deteriorates
Solution Approach 1:
The probe incorporates an automatic switching mechanism that detects the measurement range requirements and configures the appropriate voltage divider ratio without manual intervention. The system self-adjusts the division factor based on the connected probe tip or input signal characteristics, eliminating the need for users to manually plug in different resistors.
Solution Approach 2:
The probe pre-configures multiple voltage divider circuits with different division ratios and provides an automatic selection mechanism that prepares the appropriate configuration before measurement begins. This preliminary arrangement of multiple ready-to-use divider circuits enables rapid switching without manual resistor replacement.
Data Source
AI summary
The invention concerns a probe with at least two test prods, which are provided on a changing device connected to the probe and which can be alternately connected to an electric waveguide running inside the probe.