BE542373A - - Google Patents
Info
- Publication number
- BE542373A BE542373A BE542373DA BE542373A BE 542373 A BE542373 A BE 542373A BE 542373D A BE542373D A BE 542373DA BE 542373 A BE542373 A BE 542373A
- Authority
- BE
- Belgium
- Prior art keywords
- amplifier
- feedback
- intruder
- input circuit
- oscillate
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- 239000004020 conductor Substances 0.000 claims description 11
- 230000010355 oscillation Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 description 8
- 230000005855 radiation Effects 0.000 description 2
- 241000282472 Canis lupus familiaris Species 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000699670 Mus sp. Species 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Burglar Alarm Systems (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE542373A true BE542373A (forum.php) |
Family
ID=171071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE542373D BE542373A (forum.php) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE542373A (forum.php) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2173804A1 (forum.php) * | 1972-03-03 | 1973-10-12 | Salmet Gaston |
-
0
- BE BE542373D patent/BE542373A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2173804A1 (forum.php) * | 1972-03-03 | 1973-10-12 | Salmet Gaston |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3691556A (en) | Detection of movement in confined spaces | |
| USRE25100E (en) | chapin | |
| FR2670084A1 (fr) | Systeme de retenue pour un animal. | |
| FR2884608B1 (fr) | Detecteur bolometrique, dispositif de detection d'ondes electromagnetiques submillimetriques et millimetriques mettant en oeuvre un tel detecteur | |
| US1514123A (en) | Amplifier | |
| FR2802038A1 (fr) | Procedes et systemes de communication hybride a laser et a micro-onde | |
| CN101568051A (zh) | 一种激光还原声音信号的方法和装置 | |
| BE542373A (forum.php) | ||
| FR2544868A1 (fr) | Systeme de telemetrie acoustique | |
| US9766127B2 (en) | Terahertz detection assembly and methods for use in detecting terahertz radiation | |
| KR101870387B1 (ko) | 라디오미터 및 그 동작 방법과 이를 이용한 화재 감지 시스템 | |
| JP2011061439A (ja) | 監視システム、画像処理装置、インタフェース回路及び撮像装置 | |
| JP3543101B2 (ja) | 光マイクロホン | |
| RU2613759C1 (ru) | Устройство емкостного типа для обнаружения нарушителя | |
| EP0017547B1 (fr) | Détecteur de proximité et son utilisation | |
| US3696368A (en) | Radio frequency burglar alarm system | |
| FR2873822A1 (fr) | Systeme de capteur de securite | |
| US3047850A (en) | Sonic space alarm | |
| EP0794612B1 (fr) | Procédé de fonctionnement d'au moins un récepteur de signaux radioélectrique placé dans le voisinage d'un organe ou appareillage rayonnant | |
| CN113655414B (zh) | 用压电陶瓷产生共振频带的光学磁场传感系统 | |
| EP3669336A1 (en) | Single-element door/window opening detector | |
| JPWO2019176101A1 (ja) | 光監視装置及び方法 | |
| JPH11205116A (ja) | 人体センサ及び人体の検知方法 | |
| US3483940A (en) | High sensitivity omni-frequency microphone | |
| JPS60123703A (ja) | 超音波顕微鏡 |