JPS643799A - Gas leak alarm - Google Patents
Gas leak alarmInfo
- Publication number
- JPS643799A JPS643799A JP15903187A JP15903187A JPS643799A JP S643799 A JPS643799 A JP S643799A JP 15903187 A JP15903187 A JP 15903187A JP 15903187 A JP15903187 A JP 15903187A JP S643799 A JPS643799 A JP S643799A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- gas
- varying speed
- alarm
- signal
- 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
Links
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
PURPOSE:To shorten a delay time at the time of spraying an inspecting gas and to facilitate inspection, by providing a gas varying speed monitoring circuit which monitors the varying speed of gas density and shortens the delay time of a delay circuit when varying speed is high. CONSTITUTION:A gas detection circuit 1, when detecting the gas leaked in the air, sends its output to a gas density decision circuit 2. The circuit 2 decides the gas density from input, and sends an operating signal to the delay circuit 3 when deciding the excess of the gas density over alarm density. The circuit 3 delays the output of the circuit 2 delaying by a prescribed time so as not to issue an alarm by a noise, etc., to an alarm circuit 4 as an alarm signal. The circuit 4 issues a gas leak alarm by receiving the signal. The gas varying speed monitoring circuit 6 receives the signal from the circuits 1 and 2, and defects the varying speed of the gas density, and shortens the delay time by sending the signal to the circuit 3 when the varying speed of the gas density is high. In such a way, it is possible to shorten an inspection time by shortening the delay time by spraying the inspecting gas.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15903187A JPS643799A (en) | 1987-06-26 | 1987-06-26 | Gas leak alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15903187A JPS643799A (en) | 1987-06-26 | 1987-06-26 | Gas leak alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS643799A true JPS643799A (en) | 1989-01-09 |
Family
ID=15684745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15903187A Pending JPS643799A (en) | 1987-06-26 | 1987-06-26 | Gas leak alarm |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS643799A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57795A (en) * | 1980-06-04 | 1982-01-05 | Hitachi Ltd | Method of detecting and warning gas leakage |
JPS6240693B2 (en) * | 1985-09-24 | 1987-08-29 | Canon Kk |
-
1987
- 1987-06-26 JP JP15903187A patent/JPS643799A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57795A (en) * | 1980-06-04 | 1982-01-05 | Hitachi Ltd | Method of detecting and warning gas leakage |
JPS6240693B2 (en) * | 1985-09-24 | 1987-08-29 | Canon Kk |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5277920A (en) | Misfire detector | |
TW364058B (en) | Method and apparatus for evaluation and inspection of a composite-repaired structure | |
KR900701106A (en) | Apparatus for testing audible signal processing systems | |
JPS6457391A (en) | Sensor and method for detecting changes in number of object | |
JPS55125439A (en) | Defect inspection device | |
JPS5478191A (en) | Detecting method of defect of rice grains | |
JPS643799A (en) | Gas leak alarm | |
ES2125436T3 (en) | DETECTION OF THE PARALLY / FAILURE OF A TRANSMITTER. | |
JPS55157232A (en) | Method of inspecting pattern | |
DK1054243T3 (en) | Combined vibration measurement method and system | |
JPS54104883A (en) | Bearing abnormality detecting device | |
JPS6443773A (en) | Propagation delay testing method for logic circuit | |
JPS5748651A (en) | Detection of crack of semiconductor element | |
JPS5327444A (en) | Trouble shooting method and device for object detector | |
JPS64436A (en) | Method for checking leakage of discharge system | |
JPS57137805A (en) | Inspecting method repetitive patterns | |
JPS6410166A (en) | Detecting method for defective insulator | |
JPS57169683A (en) | Measuring device for electric current consumption | |
JPS5551367A (en) | Measuring method for switching characteristic of semiconductor integrated circuit | |
JPS5490543A (en) | Inspecting device for phase comparison relay | |
JPS6411458A (en) | Signal break detection system | |
JPS6431080A (en) | Target-signal detecting circuit | |
JPS53100286A (en) | Monitoring apparatus of eddy current flaw detector | |
JPS5462745A (en) | Test equipment for logic circuit | |
JPS54126587A (en) | Fault place detector of inspection systems |