JPS574530A - Pressure detector - Google Patents

Pressure detector

Info

Publication number
JPS574530A
JPS574530A JP7782480A JP7782480A JPS574530A JP S574530 A JPS574530 A JP S574530A JP 7782480 A JP7782480 A JP 7782480A JP 7782480 A JP7782480 A JP 7782480A JP S574530 A JPS574530 A JP S574530A
Authority
JP
Japan
Prior art keywords
reset
output
pressure
asw
waveform
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.)
Pending
Application number
JP7782480A
Other languages
Japanese (ja)
Inventor
Hideo Sato
Kazuji Yamada
Kiyomitsu Suzuki
Shigeyuki Kobori
Takao Sasayama
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7782480A priority Critical patent/JPS574530A/en
Publication of JPS574530A publication Critical patent/JPS574530A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
    • G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To enable a pressure detector to be applied to a digital engine controlling system, by a method wherein a pulse signal is obtained as an output by generating two signals having different time data according to the pressure dependence. CONSTITUTION:When an FF46 is being set, an analog switch (ASW) 41 on the side of a strain gauge 1 is on, and a positive voltage is integrated through the guage 1. On the other hand, when the FF46 is being reset, an ASW 42 on the side of a strain gauge 2 is on, and a negative voltage is integrated through the gauge 2. Comparators 44 and 45 compare reference voltages Vref1 and Vref2, which are different from each other, with a waveform (a) and output waveforms (b) and (c) respectively. The outputs of the respective comparators are applied to the reset and set terminals of the FF46 to obtain a waveform (d) for the output thereof. Accordingly, the difference between the periods of time when the FF46 is being set and reset is proportional to pressure.
JP7782480A 1980-06-11 1980-06-11 Pressure detector Pending JPS574530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7782480A JPS574530A (en) 1980-06-11 1980-06-11 Pressure detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7782480A JPS574530A (en) 1980-06-11 1980-06-11 Pressure detector

Publications (1)

Publication Number Publication Date
JPS574530A true JPS574530A (en) 1982-01-11

Family

ID=13644784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7782480A Pending JPS574530A (en) 1980-06-11 1980-06-11 Pressure detector

Country Status (1)

Country Link
JP (1) JPS574530A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129337A (en) * 1982-01-29 1983-08-02 Toshiba Corp Semiconductor type measuring device for pressure
JPH0257410A (en) * 1988-08-22 1990-02-27 Okamoto Ind Inc radial tires

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129337A (en) * 1982-01-29 1983-08-02 Toshiba Corp Semiconductor type measuring device for pressure
JPH0257410A (en) * 1988-08-22 1990-02-27 Okamoto Ind Inc radial tires

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