EP1071053A1 - System for detecting an accident in a long road tunnel - Google Patents

System for detecting an accident in a long road tunnel Download PDF

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Publication number
EP1071053A1
EP1071053A1 EP00440215A EP00440215A EP1071053A1 EP 1071053 A1 EP1071053 A1 EP 1071053A1 EP 00440215 A EP00440215 A EP 00440215A EP 00440215 A EP00440215 A EP 00440215A EP 1071053 A1 EP1071053 A1 EP 1071053A1
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European Patent Office
Prior art keywords
elements
tunnel
shock
broken
fluid
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EP00440215A
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German (de)
French (fr)
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Christian Plauche
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Individual
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Individual
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/04—Systems for signalling characterised solely by the form of transmission of the signal using hydraulic transmission; using pneumatic transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/06—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using hydraulic transmission; using pneumatic transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/04—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using hydraulic transmission; using pneumatic transmission

Definitions

  • the subject of the present invention is a detection device accident in a long road tunnel.
  • the object of the present invention is to propose a device for accident detection in a very long road tunnel, to overcome the various aforementioned drawbacks.
  • the accident detection device in a road tunnel great length is characterized basically in that it has on either side of the taxiway and at a certain height, at least one element capable on the one hand of ensuring a connection between the two ends of the tunnel, and on the other hand to be broken under the effect a shock, at least one of the ends of said element being connected to a means of controlling its integrity itself linked to a warning means
  • each of the elements consists of at least one optical fiber at one end of which is disposed a medium emitting a light ray, while at the other end is arranged a means for receiving said light ray at across said optical fiber.
  • each of the elements is hollow, sealed and suitable for be broken by shock, and it contains a fluid while the control means is able to check the characteristics of pressure of said fluid in said element.
  • a drop in pressure caused by the rupture of an element is capable of being detected by the control means, with the consequence of triggering alarm which allows rapid intervention.
  • the fluid consists in air or in pressurized water.
  • each of the elements consists of a hose made of flexible material liable to be punctured or torn off by impact or in a pipe made in a material capable of being broken by impact.
  • each of elements is in the form of a serpentine describing meanders tightened over a certain height and over the whole length of tunnel.
  • the device includes means for breaking the elements by a manual action.
  • each elements consists of several abutting parts.
  • Figure 1 shows a perspective view of an equipped tunnel an accident detection device according to the invention.
  • Figure 2 shows in schematic view of the same device.
  • the device 2 has two elements 3, only one of which is visible, placed on either side of taxiway 10, each fixed against a wall 11, and which each consist of a pipe 30 arranged in a serpentine describing meanders from top to low over a certain height, which can be around 1 meter, each of the 3 elements is covered with a canvas 4 or analog allowing it to be hidden and / or kept.
  • the pipes 30 are sealed and contain air or water under pressure. Note that the pressure can be maintained by a pump to remedy any leaks, in particular when tunnel 1, and therefore elements 3, are of great length.
  • the pipes 30 can be made of various materials, they can be flexible or rigid, being respectively, tear or brittle, so that in the event of an impact they can be ruptured and thereby create a detectable leak to at least one ends of the tunnel by an appropriate means, not shown.
  • the tearable material may consist of a plastic material flexible, while the brittle material may consist of a rigid plastic or glass.
  • the detector 5 may consist of a means for measuring the pressure inside the pipe 30. It can also be associated with the possible pump which maintains the pressure.
  • the pipe 30 contains water or another electrically conductive fluid, and is made of brittle material.
  • Pipe 30, or more exactly the fluid it contains, is part of a circuit electric, so that in the event of a break in the pipe 30, this causes the circuit to break, which break is easily detectable.
  • the device 2 can be equipped with means allowing the pipes 30 to be broken by manual action, and regularly distributed along the tunnel, and which allow report an accident in which the vehicle (s) involved have not touched the device according to the invention.
  • the pipes 30 consist of the culmination of several parts, which allows a replacement easy from the damaged part in an accident.
  • the pipes 30 can be replaced by a fiber optical or a bundle of optical fibers, or the like, where path one or more light rays emitted by a means transmitter, such as a laser transmitter for example, and received by a receiving means.
  • a means transmitter such as a laser transmitter for example
  • the breaking of the optical fiber or the bundle of optical fibers or the like causes the shutdown propagation of the light ray (s), and therefore non-reception of this or that, and the triggering of the alarm.
  • the device according to the invention whatever its mode of is simple in design and allows practically instantaneous detection of an accident, which facilitates rapid response by the emergency services.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The accident detection mechanism has elements (3) on one side and the other of a tunnel (10) covering the length of the tunnel to the tunnel end (1). The element break when there is a shock. The element is connected to an integrity controller and connected to an alert element.

Description

La présente invention a pour objet un dispositif de détection d'accident dans un tunnel routier de grande longueur.The subject of the present invention is a detection device accident in a long road tunnel.

Lorsque survient un accident dans un tunnel routier de grande longueur, la rapidité d'intervention des secours, qui conditionne souvent l'efficacité de ceux-ci, dépend avant tout de la rapidité de détection dudit accident.When an accident occurs in a large road tunnel length, the speed of emergency response, which often conditions the effectiveness of these, depends above all the speed of detection of said accident.

Ainsi une intervention rapide peut permettre de circonscrire rapidement un incendie avant que celui-ci ne se transforme en une catastrophe matérielle et humaine, comme cela est arrivé à plusieurs reprises ces dernières années.So rapid intervention can help to circumscribe quickly a fire before it turns into a material and human disaster, as happened to several times in recent years.

Actuellement, les tunnels routiers sont équipés de divers dispositifs de détection tels que des détecteurs de chaleur ou de fumées, lesquels présentent l'inconvénient d'un temps de réaction relativement long entre le moment de l'accident et l'émission de chaleur et de fumées d'un éventuel incendie, lequel est susceptible de se déclencher avec un certain retard.Currently, road tunnels are equipped with various detection devices such as heat detectors or fumes, which have the disadvantage of a time of relatively long reaction between the time of the accident and the emission of heat and smoke from a possible fire, which is likely to be triggered with a certain delay.

Les tunnels routiers sont également équipés d'un matériel de vidéo-surveillance sous la responsabilité d'opérateurs qui peuvent être défaillants.Road tunnels are also equipped with video surveillance under the responsibility of operators who may be failing.

Les dispositifs de détections actuels ne permettent donc pas de donner l'alerte instantanément, ce qui peut être très préjudiciable.Current detection devices therefore do not allow give the alert instantly, which can be very detrimental.

La présente invention a pour but de proposer un dispositif de détection d'accident dans un tunnel routier de grande longueur, permettant de remédier aux divers inconvénients précités. The object of the present invention is to propose a device for accident detection in a very long road tunnel, to overcome the various aforementioned drawbacks.

Le dispositif de détection d'accident dans un tunnel routier de grande longueur selon l'invention, se caractérise essentiellement en ce qu'il comporte de part et d'autre de la voie de circulation et à une certaine hauteur, au moins un élément apte d'une part à assurer une connexion entre les deux extrémités du tunnel, et d'autre part à être rompu sous l'effet d'un choc, l'une au moins des extrémités dudit élément étant reliée à un moyen de contrôle de son intégrité lui-même relié à un moyen avertisseurThe accident detection device in a road tunnel great length according to the invention, is characterized basically in that it has on either side of the taxiway and at a certain height, at least one element capable on the one hand of ensuring a connection between the two ends of the tunnel, and on the other hand to be broken under the effect a shock, at least one of the ends of said element being connected to a means of controlling its integrity itself linked to a warning means

Lors d'un accident d'une certaine importance du type de ceux susceptibles d'engendrer des catastrophes, l'un au moins des véhicules en cause, en quittant la voie de circulation et en percutant au moins l'un des éléments qui bordent ladite voie et qui est placé à une hauteur adéquate, va rompre au moins l'un de ceux-ci, ce qui va être détecté par les moyens de contrôle avec pour conséquence le déclenchement instantané d'une alarmeDuring an accident of a certain importance of the type of those likely to cause disasters, at least one of vehicles involved, leaving the lane and striking at least one of the elements which border said path and which is placed at an adequate height, will break at least one of these, which is going to be detected by the control means with as a consequence the instantaneous triggering of an alarm

Selon un premier mode de réalisation particulier du dispositif selon l'invention, chacun des éléments consiste en au moins une fibre optique à l'une des extrémités de laquelle est disposé un moyen émetteur d'un rayon lumineux, tandis qu'à l'autre extrémité est disposé un moyen récepteur dudit rayon lumineux au travers de ladite fibre optique.According to a first particular embodiment of the device according to the invention, each of the elements consists of at least one optical fiber at one end of which is disposed a medium emitting a light ray, while at the other end is arranged a means for receiving said light ray at across said optical fiber.

Selon un second mode de réalisation du dispositif selon l'invention, chacun des éléments est creux, étanche et apte à être rompu sous un choc, et il contient un fluide tandis que le moyen de contrôle est apte à vérifier les caractéristiques de pression dudit fluide dans ledit élément.According to a second embodiment of the device according to the invention, each of the elements is hollow, sealed and suitable for be broken by shock, and it contains a fluid while the control means is able to check the characteristics of pressure of said fluid in said element.

Dans ce second mode de réalisation, une baisse de pression entraínée par la rupture d'un élément, est apte à être détectée par le moyen de contrôle, avec pour conséquence le déclenchement de l'alarme ce qui permet une intervention rapide. In this second embodiment, a drop in pressure caused by the rupture of an element, is capable of being detected by the control means, with the consequence of triggering alarm which allows rapid intervention.

Selon une caractéristique additionnelle du second mode de réalisation du dispositif selon l'invention, le fluide consiste en de l'air ou en de l'eau sous pression.According to an additional characteristic of the second mode of embodiment of the device according to the invention, the fluid consists in air or in pressurized water.

Selon une autre caractéristique additionnelle du second mode de réalisation du dispositif selon l'invention, chacun des éléments consiste en un tuyau en matière souple susceptible d'être crevé ou arraché sous l'effet d'un choc ou bien en un tuyau réalisé dans un matériau apte à être cassé sous l'effet d'un choc.According to another additional characteristic of the second mode of realization of the device according to the invention, each of the elements consists of a hose made of flexible material liable to be punctured or torn off by impact or in a pipe made in a material capable of being broken by impact.

Selon une caractéristique additionnelle du dispositif selon l'invention, quel que soit le mode de réalisation, chacun des éléments se présente sous la forme d'un serpentin décrivant des méandres serrés sur une certaine hauteur et sur toute la longueur du tunnel.According to an additional characteristic of the device according to the invention, whatever the embodiment, each of elements is in the form of a serpentine describing meanders tightened over a certain height and over the whole length of tunnel.

Selon une autre caractéristique additionnelle du dispositif selon l'invention, quel que soit le mode de réalisation, il comporte des moyens permettant de rompre les éléments par une action manuelle.According to another additional characteristic of the device according to the invention, whatever the embodiment, it includes means for breaking the elements by a manual action.

Selon une autre caractéristique additionnelle du dispositif selon l'invention, quel que soit le mode de réalisation, chacun des éléments est constitué de plusieurs parties aboutées.According to another additional characteristic of the device according to the invention, whatever the embodiment, each elements consists of several abutting parts.

Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif.The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the accompanying drawing, which represents a method of non-limiting realization.

Dans le dessin annexé :In the attached drawing:

La figure 1 représente une vue en perspective d'un tunnel équipé d'un dispositif de détection d'accident selon l'invention.Figure 1 shows a perspective view of an equipped tunnel an accident detection device according to the invention.

La figure 2 représente en vue schématique du même dispositif. Figure 2 shows in schematic view of the same device.

En référence à la figure 1, on peut voir un tunnel 1 traversé par une voie de circulation 10, et dont les deux parois longitudinales 11 sont équipées d'un dispositif 2 de détection d'accident selon l'invention.Referring to Figure 1, we can see a tunnel 1 crossed by a traffic lane 10, and whose two walls 11 are fitted with a detection device 2 according to the invention.

Le dispositif 2 comporte deux éléments 3, dont un seul est visible, placé de part et d'autre de la voie de circulation 10, chacun fixé contre une paroi 11, et qui consistent chacun en un tuyau 30 agencé en un serpentin décrivant de méandres de haut en bas sur une certaine hauteur, qui peut être de l'ordre de 1 mètre, chacun des 3 éléments est recouvert d'une toile 4 ou analogue permettant de le cacher et/ou de le maintenir.The device 2 has two elements 3, only one of which is visible, placed on either side of taxiway 10, each fixed against a wall 11, and which each consist of a pipe 30 arranged in a serpentine describing meanders from top to low over a certain height, which can be around 1 meter, each of the 3 elements is covered with a canvas 4 or analog allowing it to be hidden and / or kept.

Les tuyaux 30 sont étanches et renferment de l'air ou de l'eau sous pression. On notera que la pression peut être entretenue par une pompe pour pallier les éventuelles fuites, notamment lorsque le tunnel 1, et donc les éléments 3, sont d'une grande longueur.The pipes 30 are sealed and contain air or water under pressure. Note that the pressure can be maintained by a pump to remedy any leaks, in particular when tunnel 1, and therefore elements 3, are of great length.

Les tuyaux 30 peuvent être réalisés dans divers matériaux, ils peuvent être souples ou rigides, en étant respectivement, déchirables ou cassants, en sorte qu'en cas de choc ils puissent être rompus et créer ainsi une fuite détectable à l'une au moins des extrémités du tunnel par un moyen approprié, non représenté.The pipes 30 can be made of various materials, they can be flexible or rigid, being respectively, tear or brittle, so that in the event of an impact they can be ruptured and thereby create a detectable leak to at least one ends of the tunnel by an appropriate means, not shown.

Le matériau déchirable peut consister en une matière plastique souple, tandis que le matériau cassant peut consister en une matière plastique rigide ou en du verre.The tearable material may consist of a plastic material flexible, while the brittle material may consist of a rigid plastic or glass.

En référence à la figure 2, on peut voir le tuyau 30 d'un élément 3 relié à un détecteur 5 lui-même relié à un moyen avertisseur 6, et éventuellement à des feux d'arrêt de la circulation. Referring to Figure 2, we can see the pipe 30 of a element 3 connected to a detector 5 itself connected to a means horn 6, and possibly stop lights for the circulation.

Le détecteur 5 peut consister en un moyen de mesure de la pression à l'intérieur du tuyau 30. Il peut également être associé à l'éventuelle pompe qui entretient la pression.The detector 5 may consist of a means for measuring the pressure inside the pipe 30. It can also be associated with the possible pump which maintains the pressure.

Selon une variante du dispositif selon l'invention, le tuyau 30 contient de l'eau ou un autre fluide conducteur électriquement, et est réalisé dans un matériau cassant. Le tuyau 30, ou plus exactement le fluide qu'il renferme, fait partie d'un circuit électrique, en sorte que dans le cas d'une rupture du tuyau 30, cela entraíne la coupure du circuit, laquelle coupure est aisément détectable.According to a variant of the device according to the invention, the pipe 30 contains water or another electrically conductive fluid, and is made of brittle material. Pipe 30, or more exactly the fluid it contains, is part of a circuit electric, so that in the event of a break in the pipe 30, this causes the circuit to break, which break is easily detectable.

On notera que le dispositif 2 peut être équipé de moyens permettant de rompre les tuyaux 30 par une action manuelle, et régulièrement répartis le long du tunnel, et qui permettent de signaler un accident dans lequel le ou les véhicules impliqués n'ont pas touché le dispositif selon l'invention.It will be noted that the device 2 can be equipped with means allowing the pipes 30 to be broken by manual action, and regularly distributed along the tunnel, and which allow report an accident in which the vehicle (s) involved have not touched the device according to the invention.

De manière avantageuse, les tuyaux 30 sont constitués de l'aboutement de plusieurs parties, ce qui permet un remplacement aisé de la partie endommagée lors d'un accident.Advantageously, the pipes 30 consist of the culmination of several parts, which allows a replacement easy from the damaged part in an accident.

On notera que les tuyaux 30 peuvent être remplacés par une fibre optique ou un faisceau de fibres optiques, ou analogue, où chemine un ou plusieurs rayons lumineux émis par un moyen émetteur, tel qu'un émetteur laser par exemple, et réceptionné par un moyen récepteur. De la même manière que pour le mode de réalisation précédemment décrit, la rupture de la fibre optique ou du faisceau de fibres optiques ou analogue, entraíne l'arrêt de la propagation du ou des rayons lumineux, et donc la non-réception de celui ou celle-ci, et le déclenchement de l'alarme.It will be noted that the pipes 30 can be replaced by a fiber optical or a bundle of optical fibers, or the like, where path one or more light rays emitted by a means transmitter, such as a laser transmitter for example, and received by a receiving means. In the same way as for the previously described embodiment, the breaking of the optical fiber or the bundle of optical fibers or the like, causes the shutdown propagation of the light ray (s), and therefore non-reception of this or that, and the triggering of the alarm.

Le dispositif selon l'invention, quel que soit son mode de réalisation, est de conception simple, et il permet une détection pratiquement instantanée d'un accident, ce qui facilite une intervention rapide des secours.The device according to the invention, whatever its mode of is simple in design and allows practically instantaneous detection of an accident, which facilitates rapid response by the emergency services.

Claims (9)

Dispositif de détection d'accident dans un tunnel routier de grande longueur selon l'invention, caractérisé en ce qu'il comporte de part et d'autre de la voie de circulation (10) et à une certaine hauteur, au moins un élément (3) apte d'une part à assurer une connexion entre les deux extrémités du tunnel (1), et d'autre part à être rompu sous l'effet d'un choc, l'une au moins des extrémités dudit élément (3) étant reliée à un moyen (5) de contrôle de son intégrité lui-même relié à un moyen avertisseur (6).Accident detection device in a road tunnel great length according to the invention, characterized in that it comprises on either side of the traffic lane (10) and a certain height, at least one element (3) suitable on the one hand for ensure a connection between the two ends of the tunnel (1), and secondly to be broken by shock, one at less of the ends of said element (3) being connected to a means (5) control of its integrity, itself linked to a means horn (6). Dispositif selon la revendication 1, caractérisé en ce que chacun des éléments (3) consiste en au moins une fibre optique à l'une des extrémités de laquelle est disposé un moyen émetteur d'un rayon lumineux, tandis qu'à l'autre extrémité est disposé un moyen récepteur dudit rayon lumineux au travers de ladite fibre optique.Device according to claim 1, characterized in that each of the elements (3) consists of at least one optical fiber with one end of which is disposed a transmitting means of a light ray, while at the other end is arranged means for receiving said light beam through said optical fiber. Dispositif selon la revendication 1, caractérisé en ce que chacun des éléments (3) est creux, étanche et apte à être rompu sous un choc, et il contient un fluide tandis que le moyen de contrôle (5) est apte à vérifier les caractéristiques de pression dudit fluide dans ledit élément (3).Device according to claim 1, characterized in that each of the elements (3) is hollow, sealed and capable of being broken under shock, and it contains a fluid while the means of control (5) is able to verify the characteristics of pressure of said fluid in said element (3). Dispositif selon la revendication 3, caractérisé en ce que le fluide consiste en de l'air ou en de l'eau sous pressionDevice according to claim 3, characterized in that the fluid consists of air or water under pressure Dispositif selon la revendication 3 ou la revendication 4, caractérisé en ce que chacun des éléments (3) consiste en un tuyau (30) en matière souple susceptible d'être crevé ou arraché sous l'effet d'un choc.Device according to claim 3 or claim 4, characterized in that each of the elements (3) consists of a hose (30) of flexible material capable of being punctured or torn off under the effect of a shock. Dispositif selon la revendication 3 ou la revendication 4, caractérisé en ce que chacun des éléments (3) consiste en un tuyau (30) réalisé dans un matériau apte à être cassé sous l'effet d'un choc.Device according to claim 3 or claim 4, characterized in that each of the elements (3) consists of a pipe (30) made of a material capable of being broken under the effect of a shock. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que chacun des éléments (3) se présente sous la forme d'un serpentin décrivant des méandres serrés sur une certaine hauteur et sur toute la longueur du tunnel (1).Device according to any one of the claims above, characterized in that each of the elements (3) is present in the form of a serpentine describing meanders tight to a certain height and over the entire length of the tunnel (1). Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte des moyens permettant de rompre les éléments (3) par une action manuelle.Device according to any one of the claims previous, characterized in that it includes means allowing the elements (3) to be broken by manual action. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que chacun des éléments (3) est constitué de plusieurs parties aboutées.Device according to any one of the claims previous, characterized in that each of the elements (3) is consisting of several abutting parts.
EP00440215A 1999-07-21 2000-07-20 System for detecting an accident in a long road tunnel Withdrawn EP1071053A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909572A FR2796743B1 (en) 1999-07-21 1999-07-21 ACCIDENT DETECTION DEVICE IN A LONG LENGTH ROAD TUNNEL
FR9909572 1999-07-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126539A1 (en) 2011-03-22 2012-09-27 Epar Road Sp. Z O.O. Impact detection apparatus
FR3003383A1 (en) * 2013-03-14 2014-09-19 Sysplug ROAD ACCIDENT DETECTION SYSTEM, USING AT LEAST ONE URBAN MATERIAL PROVIDED WITH SHOCK DETECTION MEANS
CN114708737A (en) * 2022-03-30 2022-07-05 招商局重庆交通科研设计院有限公司 Emergency linkage management and control method and system for electromechanical facilities of highway tunnel

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FR2377921A1 (en) * 1977-01-24 1978-08-18 Baronnet Andre Optical fibre safety system for road and railway - uses fragile tubes which are broken by obstruction to give danger signal
FR2465280A1 (en) * 1979-09-07 1981-03-20 Securiton Ag FIRE ALARM INSTALLATION ESPECIALLY FOR A ROAD TUNNEL
JPH1055011A (en) * 1996-08-09 1998-02-24 Mitsubishi Electric Corp Device for photographing car colliding against tunnel

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US3921563A (en) * 1974-09-30 1975-11-25 Fortune Dev Corp Pneumatic alarm system
FR2377921A1 (en) * 1977-01-24 1978-08-18 Baronnet Andre Optical fibre safety system for road and railway - uses fragile tubes which are broken by obstruction to give danger signal
FR2465280A1 (en) * 1979-09-07 1981-03-20 Securiton Ag FIRE ALARM INSTALLATION ESPECIALLY FOR A ROAD TUNNEL
JPH1055011A (en) * 1996-08-09 1998-02-24 Mitsubishi Electric Corp Device for photographing car colliding against tunnel

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Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126539A1 (en) 2011-03-22 2012-09-27 Epar Road Sp. Z O.O. Impact detection apparatus
FR3003383A1 (en) * 2013-03-14 2014-09-19 Sysplug ROAD ACCIDENT DETECTION SYSTEM, USING AT LEAST ONE URBAN MATERIAL PROVIDED WITH SHOCK DETECTION MEANS
CN114708737A (en) * 2022-03-30 2022-07-05 招商局重庆交通科研设计院有限公司 Emergency linkage management and control method and system for electromechanical facilities of highway tunnel

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FR2796743B1 (en) 2001-10-26
FR2796743A1 (en) 2001-01-26

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