Is it possible to use only one conducting electrode and the grounded human body (finger, etc.) as the other electrode for the sensor?
Thank you very much for your help!!
we need to know the apprx capacitance involved here before we really make a comment on this, As long as the range and resolution fit in it should be fine. Let me know more details on that
I don´t know the capacitance because it is one electrode. But it will be a 40 - 50 cm (16 inch - 20 inch) long and 5 - 10 mm ( 2 inch - 4 inch) electrode.
The design of the electrode is not really sure. Looking for recommendations.
Thanks for reply!
Please describe me more about the usage scenario, what is the application you are looking at?
I want to detect objects between two closing doors with the AD7747.
The Sensor consists of two pair of electrodes, which are sitting one after the other. One pair of electrodes will sit on the top closing area and the other pair on the bottom closing area of the door. I want to detect jamming obstacles and human body parts contactless.
I want to use the AD 7747 in the differential mode.
can you tell me more on the installation procedure and the door size? where do you plan to install this.
it would be helpful for me to help you
the two electrodes/sensors for the single-sensor differential configuration will be aprox. 60 cm long and aprox. 1 cm wide.
The electrodes will sit in a plastic foil with an active-shield electrode underneath to direct the field
The CDC will sit in the middle of the two sensors.
sensor 1 CDC sensor 2
its little difficult for me to imagine the scenario, i suggest to go through this analogue dialogue which talks about the some basics
Capacitance Sensors for Human Interfaces to Electronic Equipment | Analog Devices
i would say that we need to do some feasibility before we conclude.
Also Apologies for the late reply
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