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TIDA-01386: Distance/OBJECT sensing

Piyush Saxena45
Intellectual 420 points
Part Number: TIDA-01386
Other Parts Discussed in Thread: TUSS4440, , PGA460, TUSS4470, IWRL6432

Tool/software:

Hi, Kindly find brief description of a problem statement for which I have been developing a 2x AA battery powered device (should last atleast 6 month). My measurement/distance sensing interval would be around 15 mins to 30 mins time interval. At present I have developed a system using cheap HC SR04 interfaced using MSP430 based ultra low power MCU. I am not able to achieve the desired coverage range since the beam/sensing angel of HC SR04 is about 15 degree only. In order achieve good range either I may need to double up the HC SR04 sensor (FAN based orientation) or use costly Ultrasonic sensors such as MB1001/MB1010 which cost USD 25 for each. 
I would like to know if there are any other options of low power sensors which can used in order to improve my coverage range and provide me with much better and reliable readings. 
Kindly suggest, Thanks. 

Piyush

  • 0
    TI__Expert 5230 points

    Hi Piyush,

    We are checking with the TI design owner and will come back to you.

    You did not exactly specify your desired coverage range - is it 30 degree?

    Also note that this sensor is not a TI product, but we will check for any recommendation that we might have for such sensor.

    Thank you for your patience,

     Thomas

  • 0
    TI__Intellectual 1730 points

    Hi Piyush,

    Are you connecting HC SR04 directly to MSP430? What is the distance you are trying to measure?

    TIDA-01386 uses PGA460 and we were able to measure 5m with 58kHz transducer. Alternatives to PGA460 are TUSS4440 and TUSS4470. Also I would suggest to look at our new M0 portfolio with many low power devices. 

    Thanks

    Gio

  • 0 in reply to Giovanni Campanella
    Intellectual 420 points

    Hi Gio, 
    Thank you for your reply. I am not looking here for ultrasonic frontend drivers, instead looking for a 
    I have HC SR04 (along with its onboard driver) connected directly with MSP430 using echo and trigger pin. I have been able to measure distance accurately. 
    FYI, as per my application note shared in the earlier post, I want to measure around 5ft of distance, which I can do with the existing sensor, but it's the beaming angle or coverage angle that is the issue. As per HC SR04 it has 15° coverage and hence it doesn't give accurate measurement if object are kept somewhat out of its line of sight. I am looking for a sensor suggestion with 30° to 45° wider coverage area hence kindly suggest me a suitable sensor to measure the distance accurately with a wider coverage area. 
    Please note my application is a AA battery powered hence power consumption should be minimum. To conserve power we are powering the HC SR04 only few milliseconds before taking result and then we switch off the power. 
    I was thinking if microwave sensors should be a good option? are they suitable for low power applications? What is the cost implications of using the same comparing to my existing sensor. 
    Will it be possible for you to suggest any cost effective sensor based solution for my application. 
    Thanks

  • 0 in reply to Piyush Saxena45
    TI__Intellectual 1730 points

    Hi Piyush, 

    In this case I would suggest to look into mmWave sensor, like IWRL6432. It can achieve the wider range and the distance you are looking at and it is pretty low power in the 2mW range. 

    Thanks

    Gio