NO980969L - Method and apparatus for sensing acceleration - Google Patents

Method and apparatus for sensing acceleration

Info

Publication number
NO980969L
NO980969L NO980969A NO980969A NO980969L NO 980969 L NO980969 L NO 980969L NO 980969 A NO980969 A NO 980969A NO 980969 A NO980969 A NO 980969A NO 980969 L NO980969 L NO 980969L
Authority
NO
Norway
Prior art keywords
capacitors
sensor
sensor output
input coupled
physical state
Prior art date
Application number
NO980969A
Other languages
Norwegian (no)
Other versions
NO980969D0 (en
Inventor
Dejan Mijuskovic
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of NO980969D0 publication Critical patent/NO980969D0/en
Publication of NO980969L publication Critical patent/NO980969L/en

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
    • G01P15/125—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 capacitive pick-up
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G01D5/241—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
    • G01D5/2417—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying separation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Fluid Pressure (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Pressure Sensors (AREA)

Abstract

En sensor (10) med seriekoplete første (24) og andre (36) kondensatorer formet av transduserplater (14, 16, 18) mellom et ladesignal og et utgangsterminal av sensoren slik at første og andre kondensatorer mottar vesentlig samme ladning fra ladesignalet. En forsterker (26) har en første inngang koplet for mottak av en referansespenning, en andre inngang koplet til en forbindelse (28) av første og andre kondensatorer, og en utgang for å framskaffe et første sensor utgangssignal som representerer en eksternt tilført fysisk tilstand. Bryterkretsene vil så reversere den seriell rekkefølgen av første og andre kondensatorer for å få et andre sensor utgangssignal. Første og andre sensor utgangssignal blir subtrahert for å finne endringen i kapasitansen som gjelder den eksternt tilførte fysiske tilstanden.A sensor (10) having series-connected first (24) and second (36) capacitors formed by transducer plates (14, 16, 18) between a charging signal and an output terminal of the sensor so that the first and second capacitors receive substantially the same charge from the charging signal. An amplifier (26) has a first input coupled to receive a reference voltage, a second input coupled to a connection (28) of first and second capacitors, and an output to provide a first sensor output signal representing an externally applied physical state. The switch circuits will then reverse the serial order of the first and second capacitors to obtain a second sensor output signal. The first and second sensor output signals are subtracted to find the change in capacitance that applies to the externally applied physical state.

NO980969A 1997-06-02 1998-03-06 Method and apparatus for sensing acceleration NO980969L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86770597A 1997-06-02 1997-06-02

Publications (2)

Publication Number Publication Date
NO980969D0 NO980969D0 (en) 1998-03-06
NO980969L true NO980969L (en) 1998-12-03

Family

ID=25350323

Family Applications (1)

Application Number Title Priority Date Filing Date
NO980969A NO980969L (en) 1997-06-02 1998-03-06 Method and apparatus for sensing acceleration

Country Status (4)

Country Link
JP (1) JPH10332737A (en)
KR (1) KR19990006368A (en)
DE (1) DE19820879A1 (en)
NO (1) NO980969L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030008832A (en) * 2001-07-20 2003-01-29 에스브이 주식회사 A charge type charging amplifier for acceleration sensor
DE102013211972B3 (en) * 2013-06-25 2015-02-12 Siemens Aktiengesellschaft Force transducer, in particular load cell

Also Published As

Publication number Publication date
NO980969D0 (en) 1998-03-06
DE19820879A1 (en) 1998-12-03
JPH10332737A (en) 1998-12-18
KR19990006368A (en) 1999-01-25

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