Sensor System Automatic Chirp Pattern Assignment
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Solution Overview
Problem
The existing sensor system requires time-consuming and labor-intensive setup of different modulation patterns when multiple sensors are installed or when a sensor is added, leading to increased work burden and potential radio wave interference.
Innovation Solution
A sensor system that includes multiple sensors configured to transmit and receive continuous waves using frequency-modulated chirp signals, with a storage section to store various chirp patterns and a setting section to select and set unique chirp patterns for each sensor, reducing the need for manual selection and setup and minimizing radio wave interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors use different modulation patterns to prevent radio wave interference, then detection accuracy is improved, but setting complexity and time consumption increase
Solution Approach 1:
Each sensor automatically determines its own chirp pattern based on its sensor ID, eliminating the need for manual configuration. The sensor autonomously selects a unique pattern from predefined options, making the system self-configuring and reducing setup time while maintaining unique identification for each sensor
Solution Approach 2:
The system changes the chirp pattern parameters (such as frequency sweep rate or modulation characteristics) based on the sensor ID. By varying these parameters according to a predetermined rule, each sensor receives a distinct configuration automatically, resolving the contradiction between unique identification and ease of setup
2Reliability
If a worker manually configures modulation patterns for each sensor, then radio wave interference is prevented, but work burden increases
Solution Approach 1:
The sensor system performs automatic configuration based on sensor IDs, eliminating the need for workers to manually set modulation patterns. Each sensor independently determines its chirp pattern, making the system easy to deploy while ensuring reliable interference prevention through unique patterns
Solution Approach 2:
Multiple chirp patterns are predetermined and stored in the sensor before deployment. When a sensor is installed, it automatically selects from these pre-prepared patterns based on its ID, eliminating the need for workers to create or configure patterns manually, thus reducing work burden while maintaining reliability
3Measurement precision
If sensors use frequency-modulated chirp signals, then detection capability is improved, but radio wave interference between sensors increases
Solution Approach 1:
Each sensor is assigned a locally unique chirp pattern based on its sensor ID, creating distinct frequency modulation characteristics for each sensor. This local differentiation ensures that while all sensors use FMCW for detection capability, each operates with unique parameters that prevent mutual interference
Solution Approach 2:
The system changes specific parameters of the chirp signals (such as frequency sweep rate, modulation depth, or frequency range) based on sensor ID. By varying these parameters, each sensor's FMCW signal becomes distinguishable, maintaining detection capability while preventing interference between multiple sensors
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 setup process, reduces radio wave interference between sensors, and ensures normal detection results by automatically assigning distinct chirp patterns to each sensor, thereby improving detection accuracy and efficiency.
Implementation Method 1
transmit and receive continuous waves of frequency-modulated chirp signals
Implementation Method 2
frequency-modulated chirp signals
Implementation Method 3
receives a radio wave reflected by an object
Data Source
AI summary
A sensor system, which includes multiple sensors configured to transmit and receive continuous waves of frequency-modulated chirp signals by using radio waves, includes a storage section that stores multiple chirp patterns having different patterns of the chirp signals, and a setting section that selects a different chirp pattern for each sensor from the multiple chirp patterns and sets the selected chirp pattern in association with the sensor.