EP3226219A1 - Panneau de signalisation pouvant être chauffé et procédé de commande et/ou de réglage d'un panneau de signalisation pouvant être chauffé - Google Patents

Panneau de signalisation pouvant être chauffé et procédé de commande et/ou de réglage d'un panneau de signalisation pouvant être chauffé Download PDF

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Publication number
EP3226219A1
EP3226219A1 EP17162548.6A EP17162548A EP3226219A1 EP 3226219 A1 EP3226219 A1 EP 3226219A1 EP 17162548 A EP17162548 A EP 17162548A EP 3226219 A1 EP3226219 A1 EP 3226219A1
Authority
EP
European Patent Office
Prior art keywords
reference surface
traffic sign
heated
heating element
signal
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Withdrawn
Application number
EP17162548.6A
Other languages
German (de)
English (en)
Inventor
Martin Österlein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Moravia GmbH
Original Assignee
Moravia GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Moravia GmbH filed Critical Moravia GmbH
Publication of EP3226219A1 publication Critical patent/EP3226219A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/20—Status alarms responsive to moisture
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/40—Arrangements responsive to adverse atmospheric conditions, e.g. to signal icy roads or to automatically illuminate in fog; Arrangements characterised by heating or drying means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0275—Heating of spaces, e.g. rooms, wardrobes
    • H05B1/0277—Electric radiators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings

Definitions

  • the present invention relates to a heatable traffic sign having a signal surface, a first electrical heating element, which is arranged and arranged such that with the first electrical heating element, the signal surface is heated, and a control and / or regulating electronics, for controlling and / or regulating the first heating element is set up and connected to the first heating element.
  • the present invention relates to a method for controlling and / or regulating a heatable traffic sign.
  • Traffic signs are often exposed to different weather conditions. Some weather conditions may cause the information indicating signal area of the traffic sign to become fogged, frozen and / or unreadable or obscured by snow accumulation. A covert or unreadable information indicating signal area counteracts the purpose of the traffic sign to inform the traffic. If the traffic sign is, for example, a traffic mirror which is intended to enable a better overview of a road user via junctions and / or entrances or exits which are difficult to see, the signal area is the mirror surface of the traffic mirror. If the mirror surface is covered with condensate, iced up or covered with snow, a potentially unapproachable inspection is not possible at all or only to a limited extent.
  • the mirror surfaces of some traffic mirrors are heatable.
  • the traffic mirror has an electrical heating element, which is arranged behind the mirror surface or embedded in the mirror surface.
  • the causes of mist condensation, icing or accumulation of snow can be traced back to the temperature of the traffic mirror in a first approximation. If the temperature of the traffic mirror is below the dew point of water, the mirror surface may fog with condensation, freeze or accumulate snow.
  • a thermostat determines the ambient temperature. If the determined temperature is below a preset value, the heating element is switched on with a control and / or regulating electronics for heating the mirror surface.
  • the blanket heating of the traffic mirror below a predetermined temperature causes the heating element to be switched on even when the mirror surface is not covered with condensation, iced up or covered with snow. An unnecessary switching on the heating element reduces its life, leads to a higher energy consumption and thus causes higher operating costs.
  • a heatable traffic sign having a signal surface, a first electrical heating element which is arranged and arranged such that the signal surface is heatable with the first electrical heating element, a control and / or regulating electronics for controlling and / or regulating the first Heated element arranged and connected to the first heating element, solved, wherein the heatable traffic sign has a reference surface and a second electrical heating element and a sensor, wherein the second electrical heating element is arranged and arranged such that the reference surface is heated with the second electrical heating element, wherein the sensor is arranged and arranged such that it detects a fog on the reference surface in an operation of the heated traffic sign, wherein the reference surface is arranged and arranged such that in the operation of the heated traffic sign of the fitting on the reference surface on a fitting on the signal surface gursch beneficialbar, wherein the control and / or regulating electronics is further configured such that in the operation of the heated traffic sign with the control and / or control electronics based on the detected by the sensor fitting on the Reference surface, the first and second
  • the term "traffic sign” encompasses traffic signs of all kinds, including traffic mirrors, stationary mirrors for outdoor use, traffic light systems, signs and boards which serve to pass on information and have a signal surface.
  • traffic sign encompasses traffic signs of all kinds, including traffic mirrors, stationary mirrors for outdoor use, traffic light systems, signs and boards which serve to pass on information and have a signal surface.
  • fitting refers to condensate and / or ice and / or snow.
  • the concept of the invention on which the application is based provides that the signal area of the heatable traffic sign is only heated by a first electrical heating element if a sufficient probability of fogging on the signal area is to be assumed.
  • a sufficient probability of whether a fog on the signal surface makes it necessary to heat the signal surface a possible fogging on a reference surface is detected.
  • the reference surface thus serves as a reference for whether the signal surface is fogged with condensate, iced or covered with snow and has to be heated by the first electrical heating element.
  • the present invention also relates to a method for controlling and / or regulating a heated traffic sign, wherein a signal surface of the heatable traffic sign is heated with a first electrical heating element, if a sensor for a reference surface, a reference element for the signal surface and with a second electrical heating element is heated, detects a fitting on the reference surface.
  • Condensate accumulated on the reference surface can be detected, for example, by detecting moisture on the reference surface. If the detected moisture for the reference surface is above a predetermined moisture value, then the reference surface is fogged with condensate.
  • the predetermined humidity value is a previously experimentally determined humidity value. In one embodiment, the predetermined humidity value during operation of the heated traffic sign by machine learning of the control and / or control electronics adaptable.
  • the sensor system has a resistive humidity sensor and / or a conductance sensor.
  • the resistive humidity sensor and / or the conductivity sensor are arranged so that the humidity sensor and / or the conductivity sensor detect moisture on the reference surface as a measure of the fogging.
  • the sensor system additionally or alternatively to a capacitive and / or optical humidity sensor, which is arranged so that the capacitive and / or optical humidity sensor detects a moisture on the reference surface as a measure of the fog.
  • the temperature for the reference surface is below freezing, fogging may occur in the form of snow and / or ice. Even at temperatures above the freezing point, ie up to about 12 ° C, a fog can form on the signal surface and / or the reference surface, since the residence time of the snow on the signal surface and / or the reference surface also from the temperature of the snow depends. The colder the on the signal surface or on the reference surface incident snow is, the longer it takes for the snow to melt at a reference surface temperature above freezing. The detection of the temperature for the reference surface may therefore be useful to detect fogging of the reference surface.
  • the sensor system has a temperature sensor which is arranged and set up in such a way that it detects a temperature for the reference surface in the operation of the heatable traffic sign, the reference surface being arranged and arranged such that in the operation of the heatable traffic sign Temperature for the reference surface on a temperature for the signal surface is gursch Anlagenbar.
  • the sensor system arranged and arranged for detecting a fitting on the reference surface detects moisture for the reference surface
  • the sensor system in one embodiment additionally has a temperature sensor which is arranged and set up in such a way that it can be heated Traffic sign detects a temperature for the reference surface, wherein the reference surface is arranged and arranged such that in the operation of the heatable traffic sign from the temperature for the reference surface to a temperature for the signal surface is gursch Anlagenbar.
  • the reference surface If fogging occurs in the form of ice and / or snow, moisture for the reference surface is usually undetectable or below a predetermined level of humidity; Nevertheless, the reference surface and / or the signal surface is fogged.
  • the temperature for the reference surface For the formation of snow or ice, the temperature for the reference surface must be below a predetermined temperature, for example, below the freezing point of water.
  • the control and / or regulating electronics first controls and / or regulates the second heating element for heating the reference surface to allow ice and / or ice accumulated on the reference surface. or melting snow. Possibly ice and / or snow located on the reference surface is melted by heating the reference surface with the second electrical heating element, so that the resulting melt water increases the moisture for the reference surface and can be detected by the sensor system. In this way, by heating the reference surface at temperatures below a predetermined temperature value and detecting a moisture for the reference surface on a fog of ice and / or snow on the signal surface gursch Strukturbar.
  • a temperature for the reference area is detected with the aid of the sensor system, wherein if the detected temperature for the reference area is below a predetermined level Temperature value, preferably the freezing point of water, the reference surface is heated with the second electric heating element to eventually melting on the reference surface located ice and / or snow, wherein when the moisture for the reference surface is above a predetermined threshold, the signal surface with the first electric heating element and the reference surface are heated with the second electric heating element.
  • a predetermined level preferably the freezing point of water
  • the reference surface is then heated to melt ice and / or snow possibly on the reference surface if the sensors do not detect moisture or moisture for the reference surface below a predetermined humidity value and the temperature for the reference surface is below a predetermined temperature, preferably below the freezing point of water.
  • the signal surface with the first electrical heating element and the reference surface with the second electrical heating element are heated when the sensor detects a temperature for the reference surface which is below a predetermined temperature value. If the temperature for the reference surface falls below the predetermined temperature value, the probability of misting of the signal surface increases. As a precautionary measure, regardless of whether or not there is actually a fog on the signal surface, in this way the temperature for the signal surface is kept above the predetermined temperature, so that no fog can form on the signal surface at all.
  • the sensor system has a temperature sensor which is arranged and arranged such that it detects a temperature for the signal surface in the operation of the heatable traffic sign, wherein the reference surface is arranged and arranged such that in the operation of the heatable traffic sign from the temperature for the signal surface to a temperature for the reference surface is gurschierbar. If the detected temperature for the signal surface is below a predetermined temperature value, then it is to be assumed that the temperature for the reference surface is also below a predetermined temperature value.
  • the detected signal surface temperature may be used in the same way as a detected reference surface temperature, as previously described.
  • a fitting on the reference surface is detected at timely intervals with the sensor system. In this way, the power consumption for the operation of a heated traffic sign is reduced.
  • a humidity for the reference area and / or a temperature for the reference area at timely intervals are detected with the sensor system.
  • the detection of possibly located on the reference surface ice and / or snow by a test heating of the reference surface and the resulting melt water can take place at predetermined time intervals, so that a permanent heating of the reference surface with the second electric heating element can be avoided.
  • the reference surface is only heated as a test for detecting ice and / or snow located on the reference surface when the temperature for the reference surface is below a predetermined temperature value. If the temperature is above the predetermined temperature value, which is preferably 12 ° C, the reference surface is too warm to be covered by ice and / or snow. A test-wise heating to melting ice and / or snow and the detection of resulting melt water is unnecessary. At temperatures of the reference surface above the predetermined temperature value, it is provided, in particular, that moisture is detected for the reference surface at time intervals with the sensor system.
  • the signal surface and the reference surface made of the same material and / or the material of the signal surface and the material of the reference surface of the same material thickness exhibit.
  • the measure of the fogging on the reference surface detected with the humidity sensor thus also serves as a measure of the fogging on the signal surface. Based on the detected measure of the fogging on the signal surface and predetermined material properties for the signal surface, it is provided in one embodiment that the control and / or regulating electronics control the heating duration and / or heating power required to remove the detected hardware on the signal surface.
  • ambient conditions is understood to mean the conditions which are defined by the type of arrangement and the constructive environment for the signal area or the reference area.
  • the reference surface has a surface area which is 0.1% to 10%, preferably 0.1% to 5%, particularly preferably 0.1% to 1% of the surface area of the signal surface. It is not necessary that the reference area used as a reference for the signal area has the same area as the signal area. Rather, it is sufficient if the reference surface has an area that allows a conclusion of a fitting on the reference surface on a fitting on the signal surface. If the area of the reference surface is smaller than the area of the signal surface, the energy requirement for test heating the reference surface with the second electrical heating element for detecting fog on the reference surface is small compared to the energy requirement for heating the signal surface with the first electrical heating element. The energy required to detect a fog on the reference surface can be reduced in this way.
  • the signal area and the reference area are spatially separated areas.
  • the reference surface may be arranged outside the signal surface and in this way does not limit the space available for the signal surface.
  • the signal surface and the first heating element in a first housing and the reference surface, the second heating element, the sensor and the control and / or regulating electronics are arranged in a second housing.
  • the reference surface serving as a reference need not be located at or near the signal surface, as long as it can be deduced from a fitting on the reference surface on a fitting on the signal surface.
  • the second housing may be disposed on the first housing, preferably on the back of the first housing. In this way, the arrangement of the second housing does not disturb the view of the signal surface.
  • the first housing and / or the second housing has one or more ventilation openings.
  • the housing and / or the housing are ventilated.
  • the ventilation openings allow ventilation of the housing interior. The components arranged in the housing are largely protected against damage.
  • the heatable traffic sign has a regenerative energy supply, preferably a solar module and / or a wind power-operated dynamo.
  • the regenerative power supply in another embodiment comprises an accumulator for storing the generated energy.
  • An accumulator electrically connected to the regenerative energy supply helps to store solar and / or wind energy and, if necessary, to emit the operation of the electrical traffic sign.
  • the use of a regenerative energy supply for the utilization of solar and / or wind energy is helpful.
  • the use of limited energy resources requires that the energy consumption for the heated traffic sign be low.
  • a traffic sign according to the invention is therefore particularly advantageous for setting up far away from connection possibilities to a public power grid.
  • the senor is further configured in such an embodiment that the sensor in operation a measure of the available for the operation of the heatable traffic sign electrical energy from the regenerative energy supply, preferably the state of charge of the accumulator or the Energy generated by the solar module, detected and the control and / or regulating electronics provides, the control and / or regulating electronics is further set up such that the control and / or regulating electronics in the operation of the heated traffic sign, the sensors for detecting a fitting timed and / or regulated, which are greater than the time intervals in a normal operation when the available energy is below a predetermined value. For example, if the state of charge of an accumulator is low, i. Lower than a predetermined value, the time interval between the detection of a fog on the reference surface and the optionally associated test heating of the reference surface is increased in order to reduce energy consumption.
  • the heatable traffic sign is a traffic mirror, wherein the first heatable surface is a mirror surface.
  • FIG. 1 a first embodiment of a heated traffic sign 1 according to the present invention is shown in a schematic representation.
  • the heatable traffic sign 1 has a signal surface 2 which is heatable with a first electrical heating element 3.
  • the first electric heating element 3 is in the FIG. 1 shown in dashed lines.
  • the electric heating element 3 is an electrical resistance heater, which is embedded in the mirror surface in the form of a heating mat.
  • a control and / or regulating electronics 5 is connected such that the control and / or regulating electronics 5 can control and / or regulate the first electrical heating element 3.
  • the control and / or regulating electronics 5 can turn on the first electric heating element, so that the first electric heating element 3 heats the signal surface 2 and any fogging, such as moisture, Ice and / or snow on which signal area 2 is removed.
  • the control and / or regulating electronics 5 is connected to a sensor 4.
  • the sensor 4 is arranged and arranged such that the sensor 4 detects a fitting on a reference surface 7 during operation of the heatable traffic sign 1.
  • the reference surface 7 is made of the same material and has the same material thickness as the signal surface 2. By fitting on the reference surface 7 is on a fitting on the signal surface 2 gursch sexualbar.
  • the heated traffic sign 1 further has a second electrical heating element 6, which in the FIG. 1 is indicated by a dashed line.
  • the second electrical heating element 6 With the second electrical heating element 6, the reference surface 7 is heated. If moisture is detected on the reference surface 7 with the sensor system 4, it can be assumed that the moisture is also present on the signal surface 2. By heating the signal surface 2 with the first electrical heating element 3 and heating the reference surface 7 with the second electrical heating element 6, a moisture on the signal surface 2 and the reference surface 7 can be removed.
  • FIG. 2 another embodiment of a heated traffic sign 1 according to the present invention is shown.
  • the heatable traffic sign 1 is a traffic mirror whose mirror surface is the signal area 2.
  • the signal surface 2 can be heated with a first electrical heating element 3.
  • the first electrical heating element 3 is connected to a control and / or regulating electronics 5 which controls and / or regulates the heating power of the first electrical heating element 3.
  • the heatable traffic sign 1 has a reference surface 7.
  • the reference surface 7 is made of the same material as the signal surface 2 and also has the same material thickness.
  • the surface area of the reference surface 7 is smaller than the surface area of the signal surface 2.
  • a sensor 4 is connected, which is arranged and arranged to detect a fog on the reference surface 7.
  • the sensor system 4 has a resistive humidity sensor and a conductivity sensor for this purpose. If the sensor system 4 detects a moisture on the reference surface 7 which is above a predetermined moisture value, then there is a fog on the reference surface 7. Because of a fitting on the reference surface 7 on a fitting on the signal surface 2 is gurschierbar, it is assumed that even on the signal surface 2, a fitting is present. To remove the fitting from the signal surface 2 and the reference surface 7, the signal surface 2 is heated with the first electrical heating element 3 and the reference surface 7 with a second electrical heating element 6.
  • the second electric heating element 6 is for this purpose, as well as the first electric heating element 7, connected to the control and / or regulating electronics 5. If the moisture value for the reference surface 7 detected by the sensor system 4 drops below the predetermined moisture value, the fitting is removed from the reference surface 7 and the signal surface 2. The heating of the signal surface 2 and the reference surface 7 can be terminated.
  • the moisture value sensed by the sensor 4 may be below the predetermined moisture value, even though the reference surface 7 is fogged. However, for this the temperature for the reference surface 7 must be below the freezing point for water or at least slightly above the freezing point of water, eg below 12 ° C.
  • the sensor system 4 of the present embodiment further comprises a temperature sensor for detecting a temperature for the reference surface 7. Is the humidity value detected with the sensor system 4 below the predetermined moisture value, If the temperature for the reference surface 7 is below a predetermined temperature value, the reference surface 7 is heated as a test with the second electrical heating element 6.
  • melt water on the reference surface 7 arises as a result of the test heating, the melt water increases the moisture on the reference surface 7.
  • the increased moisture on the reference surface 7 is detected by the sensor 4 and is a measure of fog on the reference surface 7 and thus also on the signal surface 2.
  • the signal surface 2 is heated with the first electric heating element 3 and the reference surface 7 with the second electric heating element 6. If the moisture value for the reference surface 7 falls below the predetermined moisture value after heating, the fitting is completely removed and the heating of the signal surface 2 and the reference surface 7 is ended.
  • the signal surface 2 and the first electric heating element 3 in a first housing 8 and the reference surface 7, the second electric heating element 6, the sensor 4 and the control and / or regulating electronics 5 in one second housing 9 is arranged.
  • the first housing 8 and the second housing 9 also protect the components disposed therein from damage.
  • Heated traffic signs 1 shown further comprises a regenerative power supply 10.
  • the regenerative energy supply 10 comprises a solar module 11, which is electrically connected to an accumulator 12 for storing the energy generated by the solar module 11, wherein the sensor system 4 is further adapted to the energy available from the regenerative energy supply 10 for operating the heatable traffic sign 1 to detect and provide the control and / or regulating electronics 5. If the value for the energy available for operation of the heatable traffic sign 1 is smaller than a predetermined value, the time intervals for detecting a fog on the reference surface 7 are increased compared to a normal operation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Road Signs Or Road Markings (AREA)
EP17162548.6A 2016-03-31 2017-03-23 Panneau de signalisation pouvant être chauffé et procédé de commande et/ou de réglage d'un panneau de signalisation pouvant être chauffé Withdrawn EP3226219A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016105852.1A DE102016105852A1 (de) 2016-03-31 2016-03-31 Beheizbares Verkehrszeichen und ein Verfahren zum Steuern und/oder Regeln eines beheizbaren Verkehrszeichens

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EP3226219A1 true EP3226219A1 (fr) 2017-10-04

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EP17162548.6A Withdrawn EP3226219A1 (fr) 2016-03-31 2017-03-23 Panneau de signalisation pouvant être chauffé et procédé de commande et/ou de réglage d'un panneau de signalisation pouvant être chauffé

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EP (1) EP3226219A1 (fr)
DE (1) DE102016105852A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115240544A (zh) * 2022-06-09 2022-10-25 安徽医学高等专科学校 一种中英文双语宣传装置
US11892303B2 (en) 2021-05-26 2024-02-06 Here Global B.V. Apparatus and methods for predicting state of visibility for a road object
US12084822B2 (en) 2021-05-26 2024-09-10 Here Global B.V. Apparatus and method for controlling a functional road object

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02156400A (ja) * 1988-12-08 1990-06-15 Nissei Build Kogyo Co Ltd 交通標識の融雪装置
JP2003303399A (ja) * 2002-02-09 2003-10-24 Yasuto Fukui 信号機の融雪装置及び給電方法
US20060001727A1 (en) * 2001-04-19 2006-01-05 Haas William S Controllable thermal warming device
US7211771B1 (en) * 2005-11-18 2007-05-01 Precision Solar Controls Inc. De-icing system for traffic signals
EP2196732A1 (fr) * 2008-12-12 2010-06-16 Lumination, LLC Système de dégivrage automatique pour appareil d'éclairage à basse consommation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19719226C1 (de) * 1997-05-07 1998-11-12 Burkhard Am Orde Verfahren zur Ermittlung von Witterungsverhältnissen und Vorrichtung zur Durchführung des Verfahrens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02156400A (ja) * 1988-12-08 1990-06-15 Nissei Build Kogyo Co Ltd 交通標識の融雪装置
US20060001727A1 (en) * 2001-04-19 2006-01-05 Haas William S Controllable thermal warming device
JP2003303399A (ja) * 2002-02-09 2003-10-24 Yasuto Fukui 信号機の融雪装置及び給電方法
US7211771B1 (en) * 2005-11-18 2007-05-01 Precision Solar Controls Inc. De-icing system for traffic signals
EP2196732A1 (fr) * 2008-12-12 2010-06-16 Lumination, LLC Système de dégivrage automatique pour appareil d'éclairage à basse consommation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11892303B2 (en) 2021-05-26 2024-02-06 Here Global B.V. Apparatus and methods for predicting state of visibility for a road object
US12084822B2 (en) 2021-05-26 2024-09-10 Here Global B.V. Apparatus and method for controlling a functional road object
CN115240544A (zh) * 2022-06-09 2022-10-25 安徽医学高等专科学校 一种中英文双语宣传装置

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