FR2283444A1 - Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end - Google Patents

Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end

Info

Publication number
FR2283444A1
FR2283444A1 FR7426619A FR7426619A FR2283444A1 FR 2283444 A1 FR2283444 A1 FR 2283444A1 FR 7426619 A FR7426619 A FR 7426619A FR 7426619 A FR7426619 A FR 7426619A FR 2283444 A1 FR2283444 A1 FR 2283444A1
Authority
FR
France
Prior art keywords
housing
detector
mass
threshold value
fluid filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7426619A
Other languages
French (fr)
Other versions
FR2283444B1 (en
Inventor
Frederic Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sagem SA
Original Assignee
Sagem SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sagem SA filed Critical Sagem SA
Priority to FR7426619A priority Critical patent/FR2283444A1/en
Publication of FR2283444A1 publication Critical patent/FR2283444A1/en
Application granted granted Critical
Publication of FR2283444B1 publication Critical patent/FR2283444B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/135—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by making use of contacts which are actuated by a movable inertial mass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The detector comprises a mass (1) freely mounted in a housing (2) elongated in the sensitive direction, parallel to the direction in which speed variations are to be measured. The housing (2) is sealed and filled with a fluid. The mass is held immobile in its housing until the acceleration exceeds a threshold value. The impact of the mass at the end of the housing is detected (4). A deformable wall may link the body of the housing to a component which carries the retention means and/or the detector, this component being mobile along the sensing axis. The viscous forces during movement of the mass are much greater than the forces acting on the mass due to speed variations.
FR7426619A 1974-07-31 1974-07-31 Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end Granted FR2283444A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7426619A FR2283444A1 (en) 1974-07-31 1974-07-31 Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7426619A FR2283444A1 (en) 1974-07-31 1974-07-31 Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end

Publications (2)

Publication Number Publication Date
FR2283444A1 true FR2283444A1 (en) 1976-03-26
FR2283444B1 FR2283444B1 (en) 1977-01-07

Family

ID=9141941

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7426619A Granted FR2283444A1 (en) 1974-07-31 1974-07-31 Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end

Country Status (1)

Country Link
FR (1) FR2283444A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652906A1 (en) * 1989-10-06 1991-04-12 Breed Automotive Tech SPEED CHANGE DETECTOR WITH ADJUSTMENT SCREW.
FR2653590A1 (en) * 1989-10-06 1991-04-26 Breed Automotive Tech BIPOLAR SPEED CHANGE DETECTOR.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270560A (en) * 1964-02-19 1966-09-06 Thiokol Chemical Corp Critical condition indicator
US3498137A (en) * 1965-07-22 1970-03-03 Joel B Guin Motion measuring instrument
US3771368A (en) * 1971-02-22 1973-11-13 Singer Co Multi-output integrating accelerometer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270560A (en) * 1964-02-19 1966-09-06 Thiokol Chemical Corp Critical condition indicator
US3498137A (en) * 1965-07-22 1970-03-03 Joel B Guin Motion measuring instrument
US3771368A (en) * 1971-02-22 1973-11-13 Singer Co Multi-output integrating accelerometer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2652906A1 (en) * 1989-10-06 1991-04-12 Breed Automotive Tech SPEED CHANGE DETECTOR WITH ADJUSTMENT SCREW.
FR2653590A1 (en) * 1989-10-06 1991-04-26 Breed Automotive Tech BIPOLAR SPEED CHANGE DETECTOR.

Also Published As

Publication number Publication date
FR2283444B1 (en) 1977-01-07

Similar Documents

Publication Publication Date Title
SE7601686L (en) APPLICATION FOR ACCELERATION OF ACCELERATIONS, SPECIAL COMPONENTS OF EARTH ACCELERATION FOR ANGLE SATURATION
FR2279081A1 (en) FORCE MEASURING DEVICE
FR2283444A1 (en) Fluid filled acceleration detector - has mass held below threshold value in housing with detector at end
ZA755557B (en) Angular velocity sensor with improved sensitivity
JPS5296565A (en) Mass and force measuring device
GB1318344A (en) Strata control indicator
FR2285695A1 (en) CONTACTS DEVICE EQUIPPED WITH SHOCK ABSORBERS
BE826603A (en) FORCE SENSOR DEVICE
NZ179499A (en) Fluid flow weight measuring device
JPS5392178A (en) Fluid viscosity measuring device
NL7413869A (en) MASS AND FORCE MEASUREMENT DEVICE.
SU525866A1 (en) Device for an exemplary measurement of the magnitude of a constant rate of change of pressure
SU505966A1 (en) Accelerometer
CH512073A (en) Pendulum accelerometer for measuring the linear acceleration of a body in the direction of an axis
JPS52153763A (en) Outside diameter size detector
SU561139A2 (en) Angular velocity measuring device
FR2274922A1 (en) ACCELERATION LOAD MEASUREMENT AND INDICATION DEVICE
JPS5296566A (en) Mass and force measuring device
SU484417A1 (en) Force measuring device
GABRICHIDZE An experimental-analytical method of studying the stress-strain state of three-dimensional elastic bodies
KOS et al. THE QUESTION OF MEASURING AVERAGE VELOCITY RATE IN PIPES BY MEANS OF POINT-TYPE SENSORS
BUIKO et al. Alloying profile measurer for epitaxial films
JPS531589A (en) Measuring device for dynamic characteristics of oil seal
DEMETRIADES Hot-wire anemometer measurements in a hypersonic wake behind a circular cylinder in a wind tunnel, detecting points of transition
BOULAY et al. Spurious forces in an electrostatic suspension(Effect of spurious forces on electrostatic suspension of ultrasensitive accelerometers)

Legal Events

Date Code Title Description
ST Notification of lapse