AWR1843AOPEVM: prerequisites for using the EVM and other details

Mahalakshmi Iyadurai1

Intellectual 300 points

Part Number: AWR1843AOPEVM
Other Parts Discussed in Thread: TIDEP-01024, AWR1843AOP, MMWAVEICBOOST

1. I want to use this EVM for doing obstacle detection for visually challenged people

navigation. In addition to EVM, whether i have to buy any other SW like mmwave SDK etc. What are

the SW and other accessories i need to buy to test the EVM for obstruction sensing as like the example

you have shown in the autonomous car door /trunk opening

2. The design guide "TIDEP-01024" says the maximum range as 5 meter, is this range limitation

is for the reference design or for the device AWR1843AOP

3. What is the minimum distance for sensing obstacle

4. For low cost production after completing our design, whether without any setup like target simulator,

anechoic chamber, whether we can do production with some golden reference models like it is mentioned in your

application note "mmwave production testing overview", since we have to fix low cost for the end application,

we have to find options for low cost production setup.

5. We are selecting this sensor over ultrasonic sensor, but in the design guide "TIDEP-01024", in page 11,

it is mentioned that "For example detection of some of these objects may not be achieved at all angles

at a range of 2 m". What is the meaning of this.

Thank you,

over 4 years ago

0 Cesar over 4 years ago

TI__Guru*** 148304 points

Hi,

Is there a reason for you to use the AWR1843AOP platform for non automotive applications. Do you have a requirement regarding using the 77GHz frequency?

Thank you

cesar

0 Mahalakshmi Iyadurai1 over 4 years ago in reply to Cesar

Intellectual 300 points

Hello Cesar,

Thank you,

This product we are looking for is for our proposed product

"navigational aid for visually handicapped people".

The requirement for Visually handicapped(VH) people navigation and

obstruction sensing in autonomous driving are similar, -obstruction sensing to

avoid collision.

Currently some of the aids available for VH people are using ultrasonic sensors.

These sensors have advantages like low cost, easy to implement, low power, but disadvantages

like difficulty in 3-D kind of obstruction sensing and narrow FoV. We are on the process of

experimenting both ultrasonic sensor and mmwave sensor to decide which option is superior

for the requirements of VH people.

I came across the mmsensors of TI when we need to build FMCW radar for altimeter applications,

then i thought FMCW radars can be used for navigational aid for VH, then when i referred the literature,

many work are reported in the use of FMCW radar for obstruction identification for VH people

but at frequencies around 24 GHz. Sensor at 77 GHz is small in size to fit our requirement.

I am planning the aid like the size of a pendant to clip on the shirt.

Another point is, we have to make low cost aid for it to be beneficial to many in India.

The big attraction is AOP, I suppose that we need not have 77 GHz range equipment for

testing the sensor. As mentioned in your application note "mmwave production testing overview"

We can have golden reference models to test the production units.

Also the navigational aid needs to address short distance, Since AWR1834AOP is listed for

short distance sensing like 5 m, i feel this device is more suited for our application.

In summary, since AWR1843AOP has

1) 3D sensing of +/-70 deg coverage

2) small form factor, big attraction is AOP

3) low cost

4) short distance obstruction sensing(which is required for our application)

5) better sensing than ultrasonic sensor

we are looking for this device for our product-"navigational aid for visually handicapped people"

Some aspects we have concern are

1. power consumption of AWR1843AOP

2. any need of expensive equipment for production phase which may increase cost of our proposed aid

3. Sufficiency of the +/-70 deg FoV within 1 meter area

I.Mahalakashmi

0 Cesar over 4 years ago in reply to Mahalakshmi Iyadurai1

TI__Guru*** 148304 points

Thank you,

Now I understand better your application

I think that the best SW to use for this application would be the mmWave SDK demo.

Are you familiar with this demo?

I think this SW will work better for moving environment than the obstace detection processing chain that was developed for static objects.

Do you already have an AOP EVM? You can try to run the demo

Here are answers to your initial questions:

1. I want to use this EVM for doing obstacle detection for visually challenged people

navigation. In addition to EVM, whether i have to buy any other SW like mmwave SDK etc. What are

the SW and other accessories i need to buy to test the EVM for obstruction sensing as like the example

you have shown in the autonomous car door /trunk opening

[Cesar] - The SDk SW is free, you only need to purchase the AOP EVM. In order to dubug with Code Composer Studio you would also need to buy the MMWAVEICBOOST board and power supply

MMWAVEICBOOST Evaluation board | TI.com

2. The design guide "TIDEP-01024" says the maximum range as 5 meter, is this range limitation

is for the reference design or for the device AWR1843AOP

[Cesar] the limitation is only for the specific application in the reference design. The device has capability to detect much further

3. What is the minimum distance for sensing obstacle

Please see

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/823821/iwr6843-minimum-distance-from-sensor-for-the-range-resolution

4. For low cost production after completing our design, whether without any setup like target simulator,

anechoic chamber, whether we can do production with some golden reference models like it is mentioned in your

application note "mmwave production testing overview", since we have to fix low cost for the end application,

we have to find options for low cost production setup.

[Cesar] Yes, In order to perform testing you would have to have some reference environment.

5. We are selecting this sensor over ultrasonic sensor, but in the design guide "TIDEP-01024", in page 11,

it is mentioned that "For example detection of some of these objects may not be achieved at all angles

at a range of 2 m". What is the meaning of this.

[Cesar] This means that there are very low reflectivity objects that the sensor may not be able to detect at 70deg for example.

Thank you
Cesar

Thank you

Cesar

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AWR1843AOPEVM: prerequisites for using the EVM and other details