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Using Arduino => Sensors => Topic started by: SirFrederik on Jun 13, 2018, 04:27 pm

Title: Short range radar sensors for distance measurement
Post by: SirFrederik on Jun 13, 2018, 04:27 pm
Hello community,

like the title suggests im looking for a radar sensor to measure short distances which I can read out using an Arduino.

I'm quite desperate as I cannot find any fitting radar sensors and thought this might be a place to ask.

Specifications:
It has to be a radar sensor, it needs to be able to measure distances continuously and it has to be as accurate as possible in a range from 0-1m (the min range cannot be higher than ~10cm). The price doesn't really matter.

I would be very thankfull for any advice/suggestion.

Greetings,
Frederik


ps: im also looking for a high quality ultrasonic sensor which outclasses the HC-SR04.
Title: Re: Short range radar sensors for distance measurement
Post by: jremington on Jun 13, 2018, 04:59 pm
Quote
I'm quite desperate
What will happen if the sensor you want does not exist?
Title: Re: Short range radar sensors for distance measurement
Post by: SirFrederik on Jun 13, 2018, 05:48 pm
What will happen if the sensor you want does not exist?
Would be unfortunate. Is there no such sensor?
Title: Re: Short range radar sensors for distance measurement
Post by: jremington on Jun 13, 2018, 05:56 pm
There are plenty of distance sensors that meet your range specifications.
Title: Re: Short range radar sensors for distance measurement
Post by: SirFrederik on Jun 13, 2018, 08:53 pm
Yeah i know but it has to be a radar sensor.
Title: Re: Short range radar sensors for distance measurement
Post by: el_supremo on Jun 13, 2018, 09:04 pm
Google shows several radar sensors.

Pete
Title: Re: Short range radar sensors for distance measurement
Post by: Paul_KD7HB on Jun 13, 2018, 09:40 pm
Many years ago, 20-30 or more, all the automatic commercial door openers were "radar" using microwaves. Perhaps this is what the OP is looking for.

Paul

Title: Re: Short range radar sensors for distance measurement
Post by: Wawa on Jun 14, 2018, 04:57 am
Radar sensors for short distances are AFAIK only movement sensors.
Leo..
Title: Re: Short range radar sensors for distance measurement
Post by: Paul_KD7HB on Jun 14, 2018, 05:43 am
Radar sensors for short distances are AFAIK only movement sensors.
Leo..

I guess that is right. They used Doppler and that is only movement. If the OP wants to measure small distances with radar, the pulse rep rate will have to be VERY high and VERY short pulses. I doubt anything we could afford can recover from TX to RX that quickly.

I'm thinking the new automotive forward looking radar that operated in the 70 GHz band.

Paul
Title: Re: Short range radar sensors for distance measurement
Post by: MorganS on Jun 14, 2018, 07:22 am
Why does it have to be radar? What is it about your application that makes other sensors unsuitable? Laser and ultrasonic are more usual for that distance range.
Title: Re: Short range radar sensors for distance measurement
Post by: mikb55 on Jun 14, 2018, 01:33 pm
K-band level sensors go down to 20cm.
80 GHz level sensors don't seem to publish min distance specs. Presumably you are expected to talk to the  sales engineers to discuss your requirements. You did say that price doesn't matter...