JPS5788356A - Alarm device for gas leakage - Google Patents

Alarm device for gas leakage

Info

Publication number
JPS5788356A
JPS5788356A JP16489180A JP16489180A JPS5788356A JP S5788356 A JPS5788356 A JP S5788356A JP 16489180 A JP16489180 A JP 16489180A JP 16489180 A JP16489180 A JP 16489180A JP S5788356 A JPS5788356 A JP S5788356A
Authority
JP
Japan
Prior art keywords
gas
detecting
output
false alarming
gaseous
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
JP16489180A
Other languages
Japanese (ja)
Inventor
Shigeo Akiyama
Toru Nobetani
Shigekazu Kusanagi
Hideo Kawamura
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP16489180A priority Critical patent/JPS5788356A/en
Priority to SE8105260A priority patent/SE8105260L/en
Priority to GB8127112A priority patent/GB2086583B/en
Priority to NL8104198A priority patent/NL8104198A/en
Priority to DE19813136034 priority patent/DE3136034A1/en
Priority to US06/302,161 priority patent/US4490715A/en
Publication of JPS5788356A publication Critical patent/JPS5788356A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

PURPOSE:To emit an adequate alarm despite presence of a false alarming gas by inputting the output signals from a detecting gas detecting part and a false alarming gas detecting part to logical circuits. CONSTITUTION:A gas detecting element 1a which is highly sensitive to gaseous buthane and gaseous methane and a gas detecting element 1b which is highly sensitive to steam and gaseous alcohol are connected respectively to resistances Ra, Rb, and the changes in the resistances of the gas detecting elements are converted to voltage changes Va, Vb. These voltages input to comparators 3, 4, 5. Since the reference voltage of the comparator 3 is set high, an output signal is generated only when the detecting gas of high concn. exists. The reference voltages V4, V5 of the comparators 4, 5 are set low, and generate outputs for detecting gas and false alarming gas of low concns. as well, but since the output of the comparator 5 is inverted by an inverter 7, an AND circuit 8 generates an output (d) only when the false alarming gas does not exist.
JP16489180A 1980-09-13 1980-11-21 Alarm device for gas leakage Pending JPS5788356A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP16489180A JPS5788356A (en) 1980-11-21 1980-11-21 Alarm device for gas leakage
SE8105260A SE8105260L (en) 1980-09-13 1981-09-04 Gas Detector
GB8127112A GB2086583B (en) 1980-09-13 1981-09-08 Gas detector
NL8104198A NL8104198A (en) 1980-09-13 1981-09-11 GAS DETECTOR.
DE19813136034 DE3136034A1 (en) 1980-09-13 1981-09-11 GAS DETECTOR
US06/302,161 US4490715A (en) 1980-09-13 1981-09-14 Gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16489180A JPS5788356A (en) 1980-11-21 1980-11-21 Alarm device for gas leakage

Publications (1)

Publication Number Publication Date
JPS5788356A true JPS5788356A (en) 1982-06-02

Family

ID=15801835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16489180A Pending JPS5788356A (en) 1980-09-13 1980-11-21 Alarm device for gas leakage

Country Status (1)

Country Link
JP (1) JPS5788356A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102141A (en) * 1981-12-15 1983-06-17 Toshiba Corp Gas detection circuit
JPS58102140A (en) * 1981-12-15 1983-06-17 Toshiba Corp Gas detection circuit
JPS5923242A (en) * 1982-07-30 1984-02-06 Toshiba Corp Gas detector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102141A (en) * 1981-12-15 1983-06-17 Toshiba Corp Gas detection circuit
JPS58102140A (en) * 1981-12-15 1983-06-17 Toshiba Corp Gas detection circuit
JPH023463B2 (en) * 1981-12-15 1990-01-23 Tokyo Shibaura Electric Co
JPH0311424B2 (en) * 1981-12-15 1991-02-15 Tokyo Shibaura Electric Co
JPS5923242A (en) * 1982-07-30 1984-02-06 Toshiba Corp Gas detector

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