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William Murray

Magnetic Field Sensors

William Murray
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EMCgenius
EMCgenius
7/18/2013 1:25:24 AM
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Teacher
guass tesla conversion
There are 10^4 gauss per tesla.  The article gets this backward.  It should say T=G/10^4, not T=G•104


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BillWM
BillWM
7/17/2013 7:35:43 PM
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Re: Extreme Sensitivity?
I would imagine some of the sensors used in some of the new hard-drive heads would be overkill, but possibly a GMR sensor of similar nature could be made to work.   Also some of the MEMS sensors can be small and sensitive.

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Guru of Grounding
Guru of Grounding
7/17/2013 7:12:19 PM
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Teacher
Extreme Sensitivity?
The choices do seem overwhelming. I'm looking into the feasibility of a sensor that will detect the magnetic field produced by a single conductor carrying 1 mA or less. Frequency range of 50 Hz to perhaps 5 kHz is sufficient. I could always use a Rogowski coil but I have a suspicion that a more recent type of sensor may be well-suited, yet smaller and less expensive. Any ideas to save me the tedious searching.

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antedeluvian2
antedeluvian2
7/15/2013 9:18:05 AM
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Newbie
proximity switches.
I remember the National Semi (now TI) V/F and F/V converterLM2907/2917 as being quite useful in interfacing to magnetic sensors in dtetcting the rotational speed.

 

I used regular proximity switches in a qaudrature arrangement to create a rugged linear displacement transducer. I wrote about it in the second half of my blog "Custom Sensors Enhance MCU Design" on MCC.

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Netcrawl
Netcrawl
7/13/2013 10:18:06 AM
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Master
Re: Hall effect sensor - Vehicle
Interesting topic thanks for the share, hall effect sensor are used in industry to measure proximity of objects, speed, rotary positions, electric currents and intensity magnetic fields. These kind of  sensors are used in tachometers and electric motor. And companies like GE and Honeywell are good example of companies that perform well in this area. 

 


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BillWM
BillWM
7/12/2013 11:49:30 AM
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Re: Hall effect sensor - Vehicle
Hall effect sensors are a good fit where ever dirt and oil are found.

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DaeJ
DaeJ
7/12/2013 11:35:38 AM
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Master
Hall effect sensor - Vehicle
Simply by using hall effect sensor, vehicle speed or engine fan speed is detected and controlled, and also, in the hybrid vehicle, hall effect current sensor is used for monitoring regenerated DC voltage as very crucial factor in order to expand HEV battery life including regenerative brake. So, I guess that in the future, hall effect sensor will be one of main sensors in HEV vehicle.

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<<   <   Page 2 / 2
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