Binary Switch Position Transmission Using Pulse Delay Coding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for monitoring and transmitting the position of a binary switch, such as in high-voltage switching systems, suffer from inaccuracies due to different delays of pulse edges caused by temperature variations, leading to corrections that complicate the determination of pulse lengths.
Innovation Solution
The method employs pulse frequency modulation by generating two successive pulses with different pulse lengths, where the coding of the auxiliary voltage level is based on the delay time between identical edges of these pulses, eliminating the need for edge delay corrections and replacing pulse duration modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse duration modulation is used to transmit auxiliary voltage level, then the switch position can be monitored, but temperature variations cause different delays of pulse edges leading to measurement inaccuracies
Solution Approach 1:
The patent uses periodic pulse pairs instead of single pulses, where each period contains two pulses with different lengths. By measuring the delay between identical edges of successive pulses rather than within a single pulse, the method eliminates temperature-induced edge delay variations while maintaining continuous monitoring capability.
2Measurement precision
If correction values are introduced for edge delay, then measurement accuracy can be improved, but the device complexity and calibration process increase
Solution Approach 1:
Instead of trying to compensate for the harmful effect of temperature-induced edge delays through correction values, the patent converts this problem into a benefit by using the delay between identical edges of successive pulses as the measurement basis. This approach naturally eliminates the need for correction values and calibration processes.
3Loss of information
If pulse duration modulation is used, then auxiliary voltage level information can be transmitted, but the determination of pulse length becomes complicated due to edge delays
Solution Approach 1:
The patent employs periodic pulse pairs where the delay between identical edges of successive pulses encodes the auxiliary voltage level. This periodic structure simplifies the determination process by providing clear reference points (identical edges) that are insensitive to temperature variations, eliminating the complexity of pulse length determination while maintaining information transmission.
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
This approach simplifies the monitoring and transmission of a binary switch position by reducing inaccuracies and allowing independent transmission of switch position and auxiliary voltage level information, enhancing reliability and accuracy.
Implementation Method 1
the coder 3 and the decoder 5 being DC-isolated by the transmitting means 4 comprising optical components
Data Source
AI summary
The present disclosure relates to simplified monitoring and transmission of a binary switch position by means of coded switching, in which corrections caused by different pulse edge delays are eliminated. According to the disclosure, an auxiliary voltage which is to be transmitted when the switch position is closed is coded using two identical pulse edges of two different pulses, that is to say using either the two connection edges or the two disconnection edges of the two pulses. As a result, the previously known pulse duration modulation is replaced with modulation of the delay time between the two pulses. The two pulses mentioned can be repeatedly generated inside a basic period, which is independent of the auxiliary voltage, and have, for distinguishing purposes, a connection duration or pulse length which is different but is independent of the auxiliary voltage.