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  • Ultrasonic Sensing Subsystem Reference Design for Gas Flow Measurement

    • TIDUEJ6A January   2019  – July 2022

       

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  • Ultrasonic Sensing Subsystem Reference Design for Gas Flow Measurement
  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Flow Measurement
      2. 2.2.2 ToF Measurement
        1. 2.2.2.1 ADC-Based Acquisition Process
        2. 2.2.2.2 Ultrasonic Sensing Flow-Metering Library
      3. 2.2.3 Low-Power Design
        1. 2.2.3.1 Energy-Efficient Software
        2. 2.2.3.2 Optimized Hardware Design
        3. 2.2.3.3 Efficient Use of FRAM
        4. 2.2.3.4 The LEA Advantage
    3. 2.3 Highlighted Products
      1. 2.3.1 MSP430FR6043
      2. 2.3.2 OPA836 and OPA838
      3. 2.3.3 TS5A9411
    4. 2.4 System Design Theory
      1. 2.4.1 Signal Processing for ToF
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
        1. 3.1.1.1 EVM430-FR6043
      2. 3.1.2 Software
        1. 3.1.2.1 MSP Driver Library (MSP DriverLib)
        2. 3.1.2.2 Ultrasonic Sensing Flow Metering Library
        3. 3.1.2.3 Application
          1. 3.1.2.3.1 Application Customization
          2. 3.1.2.3.2 LCD Stand-Alone Mode
        4. 3.1.2.4 USS Design Center (PC GUI)
      3. 3.1.3 Transducer and Meter
        1. 3.1.3.1 Frequency Characterization of Transducer and Meter
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
        1. 3.2.1.1 Connecting Hardware
        2. 3.2.1.2 Building and Loading Software
          1. 3.2.1.2.1 Using Code Composer Studio IDE
          2. 3.2.1.2.2 Using IAR Embedded Workbench IDE
        3. 3.2.1.3 Executing Application
        4. 3.2.1.4 Configure Device and Observe Results Using GUI
        5. 3.2.1.5 Customization and Optimization
      2. 3.2.2 Test Results
        1. 3.2.2.1 Single-Shot Standard Deviation
        2. 3.2.2.2 Zero-Flow Drift
        3. 3.2.2.3 Absolute Time of Flight Measurements
        4. 3.2.2.4 Variability in Zero Flow Drift Across Transducers
        5. 3.2.2.5 Flow Measurements
        6. 3.2.2.6 Average Current Consumption
        7. 3.2.2.7 Memory Footprint
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 Bill of Materials
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
      4. 4.1.4 Altium Project
      5. 4.1.5 Gerber Files
      6. 4.1.6 Assembly Drawings
    2. 4.2 Software Files
    3. 4.3 Related Documentation
    4. 4.4 Terminology
    5. 4.5 Trademarks
    6. 4.6 Support Resources
  10. 5About the Authors
  11. 6Revision History
  12. IMPORTANT NOTICE
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DESIGN GUIDE

Ultrasonic Sensing Subsystem Reference Design for Gas Flow Measurement

Description

This reference design helps designers develop an ultrasonic gas-metering subsystem using an integrated, ultrasonic sensing solution (USS) module, which provides superior metrology performance, with low-power consumption and maximum integration. The design is based on the 64KB MSP430FR6043 microcontroller (MCU) with integrated high-speed ADC-based signal acquisition and an integrated low-energy accelerator (LEA) to optimize digital signal processing.

Resources

TIDM-02003 Design Folder
MSP430FR6043 Product Folder
EVM430-FR6043 Tool Folder
TS5A9411 Product Folder
OPA836 Product Folder
OPA838 Product Folder
TPS61240 Product Folder
TPS22860 Product Folder
Ask our TI E2E™ support experts

Features

  • Best-in-class metrology performance: ±250-ps zero-flow drift (ZFD) and 500-ps single-shot standard deviation across 200-kHz to 500-kHz transducers
  • Low power consumption: <20 µA across 200-kHz to 500-kHz transducers with one set of comprehensive results per second
  • Flexibility to operate with a variety of pipes and transducers
  • Easy to test and customize using ultrasonic sensing design center graphical user interface (GUI) and Ultrasonic sensing (USS) software library
  • ±1% flow accuracy up to 12000 lph with dynamic range of 200:1
  • 3-lph minimum detectable flow rate
  • Waveform capture based processing features:
    • Robust performance against variation of transducer characteristics over temperature
    • Ease of meter calibration, insensitive to transducer characteristic variations
    • Allows meter diagnostics like monitoring transducer aging and external noise interference
    • On-chip automatic gain control (AGC) allows dynamic implementation to handle changing transducer or gas environmental conditions

 
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