JPH02212728A - Pressure sensor - Google Patents

Pressure sensor

Info

Publication number
JPH02212728A
JPH02212728A JP3465389A JP3465389A JPH02212728A JP H02212728 A JPH02212728 A JP H02212728A JP 3465389 A JP3465389 A JP 3465389A JP 3465389 A JP3465389 A JP 3465389A JP H02212728 A JPH02212728 A JP H02212728A
Authority
JP
Japan
Prior art keywords
voltage
comparator
output
threshold
resistance
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
JP3465389A
Other languages
Japanese (ja)
Other versions
JP2724369B2 (en
Inventor
Arimasa Abe
Akihiro Aoi
Takashi Yamada
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP3465389A priority Critical patent/JP2724369B2/en
Publication of JPH02212728A publication Critical patent/JPH02212728A/en
Application granted granted Critical
Publication of JP2724369B2 publication Critical patent/JP2724369B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To achieve a higher safety by performing a display of operation by a first threshold set with a pressure signal set by a pressure setter and a display of stability by a second threshold differing in level by a specified value from the first threshold.
CONSTITUTION: A voltage across a pressure sensor chip 2 is applied to an operational amplifier 4 and taken out as voltage signal to be applied to first and second comparators 5 and 6. The comparator 5 has a set voltage, which is divided with a resistance R1, a variable resistance VR and a resistance 3, given as reference voltage with a pressure setter at a power source terminal 1. A subtraction circuit 6a of the comparator 6 subtracts a specified voltage Vref from the reference voltage and a subtraction output thereof is applied to a non-inversion input terminal of the operational amplifier 6b as reference input. The comparator 5 turns ON an operation display lamp 7 by an output thereof and at the same time, an output transistor Tr1 is driven. An output of the comparator 6 turns ON a stability display lamp 8. This permits recognition that there is a fixed allowance.
COPYRIGHT: (C)1990,JPO&Japio
JP3465389A 1989-02-13 1989-02-13 Pressure sensor Expired - Lifetime JP2724369B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3465389A JP2724369B2 (en) 1989-02-13 1989-02-13 Pressure sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3465389A JP2724369B2 (en) 1989-02-13 1989-02-13 Pressure sensor

Publications (2)

Publication Number Publication Date
JPH02212728A true JPH02212728A (en) 1990-08-23
JP2724369B2 JP2724369B2 (en) 1998-03-09

Family

ID=12420400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3465389A Expired - Lifetime JP2724369B2 (en) 1989-02-13 1989-02-13 Pressure sensor

Country Status (1)

Country Link
JP (1) JP2724369B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519936U (en) * 1991-08-29 1993-03-12 株式会社小松製作所 Vacuum pressure detection structure of vacuum suction device
ES2126505A1 (en) * 1996-12-23 1999-03-16 Valeo Climatizacion Sa Regulation device for a motor-driven fan of heating and/or air-conditioning apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519936U (en) * 1991-08-29 1993-03-12 株式会社小松製作所 Vacuum pressure detection structure of vacuum suction device
ES2126505A1 (en) * 1996-12-23 1999-03-16 Valeo Climatizacion Sa Regulation device for a motor-driven fan of heating and/or air-conditioning apparatus

Also Published As

Publication number Publication date
JP2724369B2 (en) 1998-03-09

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