Circuit Tracer With Rotating OLED Display And Inductive Clamp
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Circuit tracers lack safety features to confirm power disconnection, are cumbersome in confined spaces, and have readability issues due to display orientation, especially when tracing inaccessible electric circuits.
Innovation Solution
A circuit tracer system with a transmitter that sends distinct signals for live or dead circuits, a receiver with multiple antennas for signal strength detection, and an OLED display that rotates for readability, along with an independent clamp unit for inductive coupling and power indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transmitter sends continuous signals to trace circuits, then the receiver can detect signal strength, but the receiver may overload when in close proximity to the wire being traced
Solution Approach 1:
The transmitter sends periodic pulse signals rather than continuous signals. The signal is transmitted as pulses with specific duty cycles (e.g., 10% duty cycle for live circuits, 50% duty cycle for dead circuits), which allows the receiver to detect signal presence without being overloaded by continuous strong signals. This periodic transmission enables the receiver to distinguish between close proximity (strong signal) and actual circuit state.
Solution Approach 2:
The transmitter changes the signal parameters (pulse width, duty cycle, frequency) based on the circuit state being traced. By modulating these parameters, the system can provide information about the circuit state (live/dead) while controlling the signal strength to prevent receiver overload. The receiver detects these parameter changes to determine both signal strength and circuit state.
2Measurement precision
If the receiver has high sensitivity to detect low power signals over wide area, then it can trace circuits effectively, but it becomes difficult to read the display when held at certain orientations
Solution Approach 1:
The display automatically rotates or reorients itself based on the receiver's orientation. When the receiver is tilted or turned, the display rotates to maintain an upright, readable position. This dynamic adjustment ensures that the display remains easy to read regardless of how the receiver is held, while maintaining high sensitivity for signal detection.
3Device complexity
If the clamp unit is permanently fixed to the transmitter, then the structure is simple, but the transmitter becomes cumbersome in confined spaces
Solution Approach 1:
The clamp unit is separated from the transmitter and operates as an independent component. The clamp can be attached to or removed from the transmitter as needed, allowing it to be positioned in confined spaces without being permanently constrained. This segmentation enables the clamp to access tight areas while keeping the main transmitter body relatively compact and manageable.
Solution Approach 2:
The clamp unit is extracted as a separate functional module from the transmitter. This allows the clamp to be independently positioned and operated, providing flexibility in confined spaces. The clamp can be attached to the transmitter when needed and removed when not needed, eliminating the constraint of permanent attachment while maintaining structural simplicity.
4Adaptability or versatility
If the transmitter uses inductive coupling through a clamp, then it can trace insulated wires without direct connection, but the clamp requires space to surround the wire
Solution Approach 1:
The clamp is designed with localized magnetic coupling capability, concentrating the magnetic field in a small region around the wire. This allows the clamp to effectively couple with insulated wires in a compact area, minimizing the space required while maintaining the ability to trace insulated circuits. The magnetic field is concentrated at the clamp contact points rather than requiring large surrounding space.
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
Enhances safety by confirming power disconnection, improves usability in confined spaces, and ensures readable signal strength indication regardless of receiver orientation, increasing accuracy and efficiency in tracing electric circuits.
Implementation Method 1
Inductive transmission operates by using the principles of electromagnetic mutual inductance, which state that any change of magnetic flux (current) in one conductor will induce a voltage in another conductor. Thus, this principle is used to impose a signal onto a wire by subjecting the wire to a magnetic field set up by an alternating current (AC) signal transmitter circuit.
Implementation Method 2
The receiver indicates reception and strength of the transmitted signal in some manner, and then by indicating the strength of the received signal, the user can determine the precise location of the circuit by finding the location with the strongest signal.
Data Source
AI summary
A circuit tracer includes a transmitter that places one of first and second signals on an electrical circuit depending on whether the circuit is energized. A receiver detects the signals imposed on the circuit by the transmitter, with the signal strength indicating the proximity of the receiver to the circuit. The receiver detects which of the transmitter signals is present and thereby can also indicate whether power is present on the circuit. The receiver has first and second antennas, one optimized for wide area detection and one optimized for circuit breaker detection. The receiver has an OLED display that remains properly oriented for viewing regardless of the orientation of the receiver housing. The transmitter can have a clamp version that inductively couples to the circuit being traced.