GB2012465A - Monitoring operation of traffic lights - Google Patents
Monitoring operation of traffic lightsInfo
- Publication number
- GB2012465A GB2012465A GB79362A GB7900362A GB2012465A GB 2012465 A GB2012465 A GB 2012465A GB 79362 A GB79362 A GB 79362A GB 7900362 A GB7900362 A GB 7900362A GB 2012465 A GB2012465 A GB 2012465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamps
- circuit
- logic
- lamp group
- output signals
- 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.)
- Withdrawn
Links
- 238000012544 monitoring process Methods 0.000 title abstract 2
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
A circuit for monitoring output signals of an energization circuit (1) for the lamps (2) of a traffic control system in order to detect when a conflicting combination of these output signals occurs includes logic circuits (9, 11) to which the energization circuit outputs (3) are coupled via high-ohmic potential dividers (6, 6'), the logic circuit inputs being provided with voltage limiters to limit the voltage thereat to between first and second values. This form of coupling tends to be more reliable than the electro-optical sensors previously used. Figure 1 shows the logic circuits and associated couplings for the green (G) and yellow (Y) lamps of only one signal lamp group, a similar circuit being provided for each lamp group. Each output 0N becomes logic "0" if the corresponding lamps are energised and a NOR operation is carried out on the outputs 0N corresponding to lamps which must not conflict. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7800274A NL7800274A (en) | 1978-01-10 | 1978-01-10 | DEVICE FOR MONITORING OUTPUT SIGNALS FROM CONTROL CIRCUITS FOR CONTROLLING LAMPS IN TRAFFIC CONTROL SYSTEMS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2012465A true GB2012465A (en) | 1979-07-25 |
Family
ID=19830115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB79362A Withdrawn GB2012465A (en) | 1978-01-10 | 1979-01-05 | Monitoring operation of traffic lights |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5498600A (en) |
| AU (1) | AU4333279A (en) |
| BR (1) | BR7900090A (en) |
| DE (1) | DE2900299A1 (en) |
| FR (1) | FR2414230A1 (en) |
| GB (1) | GB2012465A (en) |
| NL (1) | NL7800274A (en) |
| SE (1) | SE7900110L (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0214692A3 (en) * | 1985-09-05 | 1989-05-17 | N.V. Philips' Gloeilampenfabrieken | Monitoring a conflict detector for traffic-lights |
| EP0786752A4 (en) * | 1995-04-20 | 1997-07-30 | ||
| EP1045359A1 (en) * | 1995-04-20 | 2000-10-18 | The Nippon Signal Co. Ltd. | Monitoring apparatus and control apparatus for traffic signal lights |
| US6504485B2 (en) | 1996-12-17 | 2003-01-07 | The Nippon Signal Co., Ltd. | Monitoring apparatus and control apparatus for traffic signal lights |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8301446A (en) * | 1983-04-25 | 1984-11-16 | Philips Nv | DEVICE FOR MONITORING SIGNALS FROM A POWER NETWORK ON THE OUTPUT OF CONTROL CIRCUITS FOR CONTROLLING SIGNAL LIGHTS IN TRAFFIC CONTROL SYSTEMS. |
-
1978
- 1978-01-10 NL NL7800274A patent/NL7800274A/en not_active Application Discontinuation
-
1979
- 1979-01-05 DE DE19792900299 patent/DE2900299A1/en not_active Withdrawn
- 1979-01-05 SE SE7900110A patent/SE7900110L/en unknown
- 1979-01-05 GB GB79362A patent/GB2012465A/en not_active Withdrawn
- 1979-01-06 JP JP55079A patent/JPS5498600A/en active Pending
- 1979-01-08 FR FR7900324A patent/FR2414230A1/en not_active Withdrawn
- 1979-01-08 BR BR7900090A patent/BR7900090A/en unknown
- 1979-01-12 AU AU43332/79A patent/AU4333279A/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0214692A3 (en) * | 1985-09-05 | 1989-05-17 | N.V. Philips' Gloeilampenfabrieken | Monitoring a conflict detector for traffic-lights |
| EP0786752A4 (en) * | 1995-04-20 | 1997-07-30 | ||
| EP1045359A1 (en) * | 1995-04-20 | 2000-10-18 | The Nippon Signal Co. Ltd. | Monitoring apparatus and control apparatus for traffic signal lights |
| US6184799B1 (en) | 1995-04-20 | 2001-02-06 | The Nippon Signal Co., Ltd. | Monitoring apparatus and control apparatus for traffic signal lights |
| EP1202232A3 (en) * | 1995-04-20 | 2003-11-05 | The Nippon Signal Co. Ltd. | Monitoring apparatus and control apparatus for traffic signal lights |
| US6504485B2 (en) | 1996-12-17 | 2003-01-07 | The Nippon Signal Co., Ltd. | Monitoring apparatus and control apparatus for traffic signal lights |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7900090A (en) | 1979-08-07 |
| FR2414230A1 (en) | 1979-08-03 |
| SE7900110L (en) | 1979-07-11 |
| JPS5498600A (en) | 1979-08-03 |
| DE2900299A1 (en) | 1979-07-12 |
| AU4333279A (en) | 1979-07-19 |
| NL7800274A (en) | 1979-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |