IL29843A - Intruder detecting apparatus - Google Patents
Intruder detecting apparatusInfo
- Publication number
- IL29843A IL29843A IL29843A IL2984368A IL29843A IL 29843 A IL29843 A IL 29843A IL 29843 A IL29843 A IL 29843A IL 2984368 A IL2984368 A IL 2984368A IL 29843 A IL29843 A IL 29843A
- Authority
- IL
- Israel
- Prior art keywords
- fluid
- transducers
- diaphragm
- interrogating
- tubes
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims description 68
- 230000004044 response Effects 0.000 claims description 13
- 239000013078 crystal Substances 0.000 claims description 11
- 230000035515 penetration Effects 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 13
- 239000000919 ceramic Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 241000282887 Suidae Species 0.000 description 9
- 230000035945 sensitivity Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 230000011664 signaling Effects 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009193 crawling Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 238000006842 Henry reaction Methods 0.000 description 1
- 206010052904 Musculoskeletal stiffness Diseases 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/20—Actuation by change of fluid pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66301367A | 1967-08-24 | 1967-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL29843A0 IL29843A0 (en) | 1970-01-29 |
| IL29843A true IL29843A (en) | 1971-07-28 |
Family
ID=24660152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL29843A IL29843A (en) | 1967-08-24 | 1968-04-17 | Intruder detecting apparatus |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE714066A (en:Method) |
| FR (1) | FR1576035A (en:Method) |
| GB (1) | GB1185265A (en:Method) |
| IL (1) | IL29843A (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753260A (en) * | 1971-10-04 | 1973-08-14 | Westinghouse Electric Corp | Pulse reflection test means for balanced pressure surveillance detector |
| NL7208873A (en:Method) * | 1972-06-28 | 1974-01-02 |
-
1968
- 1968-04-17 IL IL29843A patent/IL29843A/en unknown
- 1968-04-23 BE BE714066D patent/BE714066A/xx unknown
- 1968-05-10 GB GB22306/68A patent/GB1185265A/en not_active Expired
- 1968-07-24 FR FR1576035D patent/FR1576035A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1576035A (en:Method) | 1969-07-25 |
| IL29843A0 (en) | 1970-01-29 |
| DE1766574B2 (de) | 1976-01-29 |
| GB1185265A (en) | 1970-03-25 |
| DE1766574A1 (de) | 1971-02-11 |
| BE714066A (en:Method) | 1968-09-16 |
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