[time-nuts] OCXO sensitive to gravity

Javier Herrero jherrero at hvsistemas.es
Sun Aug 16 00:14:49 UTC 2009


Yes, using a quartz resonator to sense the force and other to provide 
temperature compensation. I remember that it was a very sensitive 
device, and althought several kilobucks about fifteen years ago, it was 
not prohibitive. That unit was a of the type that appears in the drawing 
'high pressure design' here 
http://www.paroscientific.com/pdf/dqadvantage.pdf since it was intended 
to work inmersed in the sea.

Regards,

Javier


J. Forster escribió:
> Oops. It looks like they sense the force from the Bourdon tube, rather
> than the displacement.
>
> -John
>
> ===============
>
>> Yes... it was not cheap, exactly :) It was from this company:
>> http://www.paroscientific.com/
>>
>> Regards,
>>
>> Javier
>>
>>
>>
>> J. Forster escribió:
>>> Oh, I know there are quartz transducers like accelerometers, pressure
>>> and
>>> force gages, etc. from companies like Endevco, Kiag/Krystal, and others.
>>> But in my experience they are lab instruments costing a bundle.
>>>
>>> The airbag sensors are cheap...  likely a buck or twp. Hence the use of
>>> silicon.
>>>
>>> Best,
>>> -John
>>>
>>> ===========
>>>
>>>
>>>> J. Forster escribió:
>>>>>> As you feel your heart beat, google for Quartz Pressure Sensor
>>>>> Again, I think these are semiconductor sensors.
>>>>>
>>>> Yes, but there are also quartz pressure sensors. Long time ago I used a
>>>> equipment to measure water columns (and hence sea waves height) that
>>>> used a quartz-based pressure sensor. It was a very sensitive equipment.
>>>>
>>>> Regards,
>>>>
>>>> Javier
>>>>
>>>> --
>>>> ------------------------------------------------------------------------
>>>> Javier Herrero                            EMAIL:
>>>> jherrero at hvsistemas.com
>>>> HV Sistemas S.L.                          PHONE:         +34 949 336
>>>> 806
>>>> Los Charcones, 17A                        FAX:           +34 949 336
>>>> 792
>>>> 19170 El Casar - Guadalajara - Spain      WEB:
>>>> http://www.hvsistemas.com
>>>>
>>>>
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>> --
>> ------------------------------------------------------------------------
>> Javier Herrero                            EMAIL: jherrero at hvsistemas.com
>> HV Sistemas S.L.                          PHONE:         +34 949 336 806
>> Los Charcones, 17A                        FAX:           +34 949 336 792
>> 19170 El Casar - Guadalajara - Spain      WEB: http://www.hvsistemas.com
>>
>>
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>
>
>
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-- 
------------------------------------------------------------------------
Javier Herrero                            EMAIL: jherrero at hvsistemas.com
HV Sistemas S.L.                          PHONE:         +34 949 336 806
Los Charcones, 17A                        FAX:           +34 949 336 792
19170 El Casar - Guadalajara - Spain      WEB: http://www.hvsistemas.com




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