[TI mmWave Radar Evaluation]_5_AWR1843BOOST Corridor Ranging Corner Reflector Test

lbbook

[TI mmWave Radar Evaluation]_5_AWR1843BOOST Corridor Ranging Corner Reflector Test [Copy link]

 

Series of posts:

1. AWR1843BOOST unboxing

2. Use of AWR1843BOOST

3. AWR1843BOOST corridor ranging value test environment

4. AWR1843BOOST corridor distance measurement iron plate test

The previous article used an iron plate test. The iron plate test is more intuitive and convenient to measure the distance, but there is an angle problem. Especially in long-distance testing, the signal strength will change greatly if the iron plate is slightly deflected. I heard that early stealth aircraft used this principle to deflect the radar signal emitted from the ground to the area outside the radar station, and then combined with absorbing materials, the possibility of being detected by radar can be greatly reduced. The use of a corner reflector in this article is another extreme. It can reflect the received radar signal back almost in parallel. The principle can be referred to Baidu Encyclopedia .

The simple corner reflector used in the test is shown below:

A piece of stainless steel sheet folded at right angles is welded to a stainless steel flat plate (each of the two folded surfaces is about 30 cm square), thus forming three mutually perpendicular surfaces.

Similarly, repeating the steps of the iron plate test, we get the following curve. It should be noted that the corner radiator reduces the angle requirement, but according to the principle, it can also be inferred that the distance has a certain uncertainty. Therefore, the distance resolution will definitely be reduced. In addition, after all, the total reflection area is relatively small, so the signal strength will be relatively weak. The echo signals at the 26m and 30m measurement points are already close to the interference signal.

From the above figure, we can see that the linearity is still good when the signal strength is guaranteed.

Below is the Excel table of the test and the spectrum of each point:

Variance 0.02683, mean square error 0.163799.

[attach ]453290[/attach] [attach]453296 [/attach]

led2015

Welding this stainless steel sheet is not easy

qwqwqw2088

Millimeter wave radar is increasingly used.

reflectometry

Hello! What does the green noise profile in the picture mean? I can't tell it!

lbbook

The green noise profile is not there because it was not selected during configuration.

ZhuMX

Hello, what is the maximum detection range of AWR1843?

zyyz

Can the error between the radar and the laser rangefinder be reduced by using a corner reflector?