LDC1612-Q1: Sensors - INTERNAL forum

Muwei Zheng

Part Number: LDC1612-Q1

Tool/software:

Hi team,

My customer Denso is looking for automotive inductive sensing solution to detect object/human proximity for in-cabin radiant heater. If anything is close to the heater it will turn heater off to prevent overheat.

They are still investigating the feasibility of different sensing technology, and they have a few questions for our inductive sensors. Could you help answer their questions below?

https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/295036/faq-inductive-sensing-faq---frequently-asked-questions?keyMatch=inductive+sensing&tisearch=universal_search&cf-support=TI+E2E%e2%84%a2+%e8%a8%ad%e8%a8%88%e3%82%b5%e3%83%9d%e3%83%bc%e3%83%88%e3%83%bb%e3%83%95%e3%82%a9%e3%83%bc%e3%83%a9%e3%83%a0

I saw this FAQ but please check if my understanding is correct or not.

1. What object can TI inductive sensor detect? - Only metal target? Denso want to detect things like towel, battery, spray can

2. What is the distance of TI inductive sensor can detect? - up to 50% of the sensor coil’s diameter?

3. Is there any rule of coil design? Denso want to design the coil at lowest height.

Thank you,

Muwei Zheng

2 months ago

0 John Miller - Sensing 2 months ago

TI__Mastermind 40295 points

Muwei,

For inductive sensors, the target does not need to be metal, but it does need to be conductive.
Checking for the case of a conductive target or no target the max distance is about 50% of the sense coil diameter.
We have an spreadsheet-based tool for coil design. It can be downloaded from here, or from any of the inductive sensor product pages.

regards,
John

0 Muwei Zheng 2 months ago in reply to John Miller - Sensing

TI__Intellectual 1560 points

Hi John,

Thank you for your feedback.

John Miller - Sensing said:
For inductive sensors, the target does not need to be metal, but it does need to be conductive.

I understood the target needs to be conductive. For those are not conductive like towel, what sensing method would you recommend for proximity detection? Ideally customer want to detect anything that could appear in a vehicle.

0 John Miller - Sensing 2 months ago in reply to Muwei Zheng

TI__Mastermind 40295 points

Muwei,

If it fits in your overall requirements, it might be good to consider ultrasonic sensors.
You can find out more about them at the Ultrasonic Sensor page on TI.com.

Regards,
John

Sensors

Sensors forum

LDC1612-Q1: Sensors - INTERNAL forum