FR2269715B1 - - Google Patents
Info
- Publication number
- FR2269715B1 FR2269715B1 FR7415335A FR7415335A FR2269715B1 FR 2269715 B1 FR2269715 B1 FR 2269715B1 FR 7415335 A FR7415335 A FR 7415335A FR 7415335 A FR7415335 A FR 7415335A FR 2269715 B1 FR2269715 B1 FR 2269715B1
- Authority
- FR
- France
- 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.)
- Expired
Links
Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
- G08B19/02—Alarm responsive to formation or anticipated formation of ice
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
Landscapes
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Geophysics And Detection Of Objects (AREA)
- Radar Systems Or Details Thereof (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7415335A FR2269715A1 (en) | 1974-05-03 | 1974-05-03 | Method of detecting icy road conditions - uses comparison of HF waves through heated and unheated road sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7415335A FR2269715A1 (en) | 1974-05-03 | 1974-05-03 | Method of detecting icy road conditions - uses comparison of HF waves through heated and unheated road sections |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2269715A1 FR2269715A1 (en) | 1975-11-28 |
| FR2269715B1 true FR2269715B1 (da) | 1976-12-17 |
Family
ID=9138413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7415335A Granted FR2269715A1 (en) | 1974-05-03 | 1974-05-03 | Method of detecting icy road conditions - uses comparison of HF waves through heated and unheated road sections |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2269715A1 (da) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI61249C (fi) * | 1979-10-10 | 1982-06-10 | Vaisala Oy | Anordning foer indikering av nedisning av asfaltsvaeg eller motsvarande |
| CN107238609A (zh) * | 2017-05-18 | 2017-10-10 | 孟敏 | 基于微波的结冰结霜检测装置及方法 |
| CN115047544B (zh) * | 2022-08-16 | 2022-12-30 | 成都信息工程大学 | 一种覆冰预警方法及系统 |
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1974
- 1974-05-03 FR FR7415335A patent/FR2269715A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2269715A1 (en) | 1975-11-28 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |