Active Infrared Sensor Pulse Width Control for Battery Saving
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Solution Overview
Problem
Existing active infrared induction systems powered by dry batteries face high power consumption due to inefficient infrared emission energy management, particularly in the duration of pulses, which has not been adequately addressed by previous technologies.
Innovation Solution
The system dynamically adjusts the pulse width of infrared emission based on the strength of the received signal using a circuit with an operational amplifier, comparator, and IC, allowing for real-time or time-lag adjustments to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the infrared emitting LED operates continuously with fixed pulse width, then the detection reliability is maintained, but the power consumption increases
Solution Approach 1:
The patent implements dynamic pulse width adjustment where the control unit modifies the pulse width of the infrared emitting LED based on real-time detection of received signal strength. The system transitions from fixed pulse width to variable pulse width operation, adjusting the emission duration dynamically to optimize both detection reliability and power consumption.
Solution Approach 2:
The system employs feedback mechanisms where the received signal strength information is fed back to the control unit, which then adjusts the pulse width accordingly. The control unit monitors the strength of received infrared signals and uses this feedback to dynamically modify the emission pulse width, creating a closed-loop control system that balances detection performance with energy efficiency.
2Speed
If the pulse width is increased to improve signal detection, then the detection range is extended, but the battery life is reduced
Solution Approach 1:
The patent applies dynamic pulse width adjustment to extend detection range only when necessary. The control unit evaluates the received signal strength and adjusts the pulse width in real-time, using longer pulses only when weak signals are detected, thereby extending detection range while minimizing unnecessary energy consumption that would reduce battery life.
Solution Approach 2:
The system changes the pulse width parameter dynamically based on detection requirements. By adjusting this critical parameter according to received signal strength, the system can extend detection range when needed while maintaining energy efficiency during normal operation, thus preserving battery life.
3Measurement precision
If multiple scanning rates and multiple sensors are used to improve detection accuracy, then the measurement precision is enhanced, but the device complexity increases
Solution Approach 1:
Instead of implementing multiple scanning rates and multiple sensors, the patent uses a single sensor with dynamic pulse width adjustment. This partial action approach achieves improved detection accuracy through intelligent control of the emission parameters rather than through system multiplication, thereby avoiding the complexity increase that would result from adding multiple components.
Solution Approach 2:
The patent improves detection accuracy by changing operational parameters (pulse width) rather than by adding components. The control unit adjusts the pulse width parameter to optimize signal detection, achieving enhanced measurement precision through parameter optimization instead of through increased system complexity.
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 effectively reduces battery consumption by optimizing power usage through dynamic pulse width adjustment, prolonging the battery life of dry battery-powered active infrared induction systems.
Implementation Method 1
the infrared emitting LED consumes a large ratio of the power consumption
Implementation Method 2
through eradiation and reflection of selective infrared rays, distinguishes and controls after processing reflected signals
Data Source
AI summary
An active infrared induction instrument powered by a dry battery capable of reducing power consumption through the adjustment of the emitter pulse width. The infrared emitted LED emits infrared signals, which, after being reflected by an object, are received by the infrared photodiode. The infrared signals received the infrared signals received by the infrared photodiode then enter an integrated circuit chip through a comparator. The pulse widths of the infrared emission pulse signals are dynamically adjusted after the width of the pulse series is received by the discrimination chip, thus reducing the emission power consumption to save energy.