JPS50124682A - - Google Patents
Info
- Publication number
- JPS50124682A JPS50124682A JP50021428A JP2142875A JPS50124682A JP S50124682 A JPS50124682 A JP S50124682A JP 50021428 A JP50021428 A JP 50021428A JP 2142875 A JP2142875 A JP 2142875A JP S50124682 A JPS50124682 A JP S50124682A
- Authority
- JP
- Japan
- 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
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
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44451974A | 1974-02-21 | 1974-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS50124682A true JPS50124682A (en) | 1975-09-30 |
Family
ID=23765249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50021428A Pending JPS50124682A (en) | 1974-02-21 | 1975-02-20 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS50124682A (en) |
| CA (1) | CA1047623A (en) |
| DE (1) | DE2507632B2 (en) |
| GB (1) | GB1448967A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL184645C (en) * | 1979-08-09 | 1989-09-18 | Philips Nv | METHOD FOR DETERMINING THE SPEED OF A VEHICLE. |
| GB2131994B (en) * | 1982-12-02 | 1986-09-03 | Sarasota Automation | Inductive loop sensors |
| FR2538915B1 (en) * | 1983-01-03 | 1985-10-25 | Bernard Jacques | DEVICE AND METHOD FOR DETECTION OF METAL OBJECTS SUCH AS FIREARMS, AND LOCAL ACCESS SAS TO PROTECT AGAINST AGGRESSIONS |
| GB8424096D0 (en) * | 1984-09-24 | 1984-10-31 | Buttemer D A | Inductive loop detector |
| CN116203315B (en) * | 2023-05-06 | 2023-07-25 | 国仪量子(合肥)技术有限公司 | Frequency measurement method and device |
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1975
- 1975-02-12 CA CA219,940A patent/CA1047623A/en not_active Expired
- 1975-02-20 JP JP50021428A patent/JPS50124682A/ja active Pending
- 1975-02-21 DE DE19752507632 patent/DE2507632B2/en not_active Withdrawn
- 1975-02-21 GB GB740675A patent/GB1448967A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2507632A1 (en) | 1975-08-28 |
| GB1448967A (en) | 1976-09-08 |
| CA1047623A (en) | 1979-01-30 |
| DE2507632B2 (en) | 1976-09-16 |
| AU7767175A (en) | 1976-07-29 |