EP0018619A1 - Installation de sécurité avec au moins un filet métallique pour la protection d'objets placés derrière cette installation - Google Patents

Installation de sécurité avec au moins un filet métallique pour la protection d'objets placés derrière cette installation Download PDF

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Publication number
EP0018619A1
EP0018619A1 EP80102286A EP80102286A EP0018619A1 EP 0018619 A1 EP0018619 A1 EP 0018619A1 EP 80102286 A EP80102286 A EP 80102286A EP 80102286 A EP80102286 A EP 80102286A EP 0018619 A1 EP0018619 A1 EP 0018619A1
Authority
EP
European Patent Office
Prior art keywords
wire rope
wire
network
warning device
electrical
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.)
Granted
Application number
EP80102286A
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German (de)
English (en)
Other versions
EP0018619B1 (fr
Inventor
Reinhold Bolliger
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.)
Kabelwerke Brugg AG
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Kabelwerke Brugg AG
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Filing date
Publication date
Application filed by Kabelwerke Brugg AG filed Critical Kabelwerke Brugg AG
Priority to AT80102286T priority Critical patent/ATE3729T1/de
Publication of EP0018619A1 publication Critical patent/EP0018619A1/fr
Application granted granted Critical
Publication of EP0018619B1 publication Critical patent/EP0018619B1/fr
Expired legal-status Critical Current

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    • 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
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/10—Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
    • 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
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • E01F7/045—Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps

Definitions

  • the invention relates to a security system for securing objects located behind the same, in particular against dangers associated with falling rocks, avalanches and other mechanical influences on the security system, with at least one wire rope network and support means for supporting or suspending the wire rope network.
  • the procedure is such that the upper limit value of the load capacity of the safety system is many times greater than the maximum load resulting from previous experience and still a considerable safety factor higher than that resulting from the terrain, etc., in theory under the most unfavorable
  • the resulting maximum load chooses, however since, as is well known, natural events are not absolutely predictable in their strength, it still happens here and there that safety systems cannot withstand extremely strong rock falls or avalanches and are either severely damaged by them or even collapse.
  • these security systems are intended for property security, whereby the objects to be secured are very often also roads, track systems and other traffic routes in addition to buildings and other fixed facilities, and in particular with traffic routes secured with such security systems, extremely strong stone chips or Avalanches that the security system is not up to and the.
  • the invention was therefore based on the object of providing a security system of the type mentioned, in which an alarm is triggered immediately in the event of substantial damage to the system.
  • the wire rope network consists at least in part of wire rope, in the core of which at least one insulated electrical conductor is arranged, and in that the electrical conductor (s) is connected to an electrical warning device, the sudden changes in the electrical properties caused by mechanical influences of the electrical conductors formed by the insulated one or more within the or the wire rope networks.
  • ten line system in particular to damage to or of the wire cable networks or breakage of the insulated electrical conductors caused by overloading of the security system, and an alarm system is actuated.
  • the present security system has the advantage that the extra effort for the actual means of the festival Position of damage to the safety system, namely for the electrical conductors in the wire ropes, is negligible and nevertheless, with the help of these simple means which cause almost no additional expense, any damage can be determined at any point on the wire rope nets or their suspension and that the warning device and the Alarm system very simple and - which is important in the present case - can be robust and therefore cause no significant additional effort; in the simplest case, the warning device can consist of a single relay and the alarm system can consist of a simple bell.
  • the individual wire rope networks can advantageously be formed by a single continuous wire rope, in the core of which an insulated electrical conductor is arranged.
  • the wire rope can be useful to form the wire rope network in the form of two intersecting meandering lines, which are traversed by the wire rope one after the other, or in the form of a section at a 45 ° angle to the sides of a substantially qua dynamic laying frame from base to base of the laying frame and at each base angled at approximately a right angle or also in other laying forms leading, for example, to a wire rope network with rhombic meshes and mechanically connected at the crossing points and possibly also intertwined.
  • a single continuous wire rope is preferably subjected to a quiescent current on the electrical conductor arranged in it, which suddenly occurs in the event of an overload breakage of the wire rope network and thus of the said continuous wire rope and thus a breakage of the electric conductor arranged in the core of the wire rope is interrupted, and the warning device connected to the conductor and supplying it with the quiescent current then actuates the alarm system when the quiescent current is interrupted by one of the wire cable networks of the security system.
  • the safety system consists of several such wire ropes, each formed by a continuous wire rope
  • the electrical conductors arranged in the wire ropes forming the individual wire rope nets can advantageously be connected in series, this series connection being supplied with a quiescent current which, in the event of an overload, of one of the wire rope nets and thus the wire rope forming this wire rope network and thus a break in the electrical conductor arranged in the core of this wire rope is suddenly interrupted, and the warning device actuates the alarm system when the quiescent current is interrupted.
  • each wire cable network can of course also have its own closed circuit, which can be advantageous for locating the breaking point.
  • the closed circuit would then run at the breaking point via the wire cable network, and the warning device would then, despite the broken cable, in any case to the criterion "interruption of rest do not respond because the quiescent circuit is never interrupted either after the rope breaks or after it.
  • the warning device responds reliably in the event of a rope break, it is necessary to design the warning device in such a way that it can also be used electrical connection between the wire cable and the electrical conductor, which can advantageously be achieved in that there is an electrical voltage between the insulated electrical conductor and the wire cable and the warning device also in the event of a current flow from the electrical conductor to the wire cable, in particular in the event of a short circuit between the electrical cables Conductor and wire rope, the alarm system actuates.
  • the wire rope network is formed by two wire ropes, in the core of each of which an insulated electrical conductor is arranged, and the two wire ropes are preferably arranged to form the wire rope network so that both wire ropes are located at each node of the wire rope network cross.
  • the two wire ropes can expediently be laid in the form of two intersecting meandering lines, each of which is traversed by one of the two wire ropes, or else in other laying shapes leading to a wire rope net with square or rhombic meshes and at the crossing points mechanically connected and possibly also intertwined.
  • This form of training is particularly advantageous if the wire rope net is suspended at its four corners via rope connections, because in this case the four rope connections ' for hanging the wire rope net can be formed directly by the four rope ends of the two wire ropes and thus the suspension of the wire rope net without electrical intermediate Connections at the corners of the network can be included in the security system, e.g. by connecting each of the two wire ropes of the wire rope network to the warning device with its own closed circuit so that at least one of the two closed circuits is interrupted if the network breaks or its suspension.
  • the warning device for current flow from one or both electrical conductors the wire cable network and when current flows from one of the electrical conductors to the other, in particular in the event of a short circuit between the cable network and one or both electrical conductors and in the event of a short circuit between the two electrical conductors, the alarm system is actuated.
  • the electrical conductors of the two wire cables can also advantageously be connected in series and acted upon by a quiescent current, which in the event of an overload break in the wire cable network and thus in the breakage of at least one of the two wire cables and thus .
  • a break in the electrical conductor arranged in the core of the relevant wire rope is suddenly interrupted; in this case, the warning device actuates one of the wire rope networks of the safety system when the quiescent current is interrupted the alarm system.
  • the warning device even with such a series connection of the electrical conductors of the two wire cables of the wire cable network, as an additional safety measure, there can advantageously be an electrical voltage between the two electrical conductors connected in series and the wire cable network, the warning device then being designed such that it is not only in the event of an interruption of the quiescent current flowing through the series connection, but also when the current flows from one of the two or two electrical conductors to the wire cable network, in particular in the event of a short circuit between the cable network and one or both electrical conductors, the alarm system is actuated.
  • the security system comprises a plurality of wire cable networks, which are formed in accordance with the preferred embodiment of two wire cables in each case, in the core of which an insulated electrical conductor is arranged
  • the electrical conductors arranged in the wire cables of the wire cable networks can advantageously be a first and a second second series connection that each of the two series connections of each wire cable network each one of the two wire cables or the electri arranged therein leader.
  • the two series circuits can form two separate quiescent circuits or can also be connected in series to form a common quiescent circuit comprising both series circuits.
  • the warning device not only when one of the two closed circuit circuits is interrupted, but also when current flows from one or both series circuits to the cable network and in the event of current flow from one of the two series connections to the other, in particular in the event of a short circuit between the wire cable networks and one or both series connections and in the event of a short circuit between the two series connections, the alarm system is actuated.
  • the two series connections are connected in series and are supplied with a quiescent current which, in the event of an overload breakage, causes one of the wire cable networks and thus at least one of the wire cables forming this cable network, and thus a break in the core.
  • this wire rope arranged electrical conductor is suddenly interrupted, and the warning device actuates the alarm system in the event of such an interruption of the quiescent current.
  • each wire cable network can be assigned its own closed circuit and a relay or flip-flop switching to the alarm system when the current is interrupted, and a separate frequency assigned to the relevant cable network can be used to transmit the response of this response device from the warning device to the alarm system.
  • Such an indication of the damaged wire rope network (s) is advantageous in addition to the alarm, especially for the disaster service or those responsible for the repair of the damage, because they immediately get an idea of the extent of the damage to the security system (damage to or several wire rope networks) and about the current danger situation (location of the damaged wire rope network (s) within the safety system) and can make the necessary decisions immediately.
  • Immediate disaster relief would not be absolutely necessary if one of the wire rope nets in a safety system built in a staggered manner in the form of several network groups arranged in a row was damaged, because an immediate inspection and then a normal repair by a construction team would suffice here be.
  • wire ropes should also be expediently provided for suspending or fastening the wire rope nets to the support means mentioned at the beginning, in the core of which at least one insulated electrical conductor connected to the warning device is arranged, so that one of these wire ropes is broken or damaged Alarm is triggered.
  • the quiescent current or the voltage to the electrical conductors arranged within the wire ropes forming the wire ropes is preferably supplied via the insulated electrical conductors in the wire ropes used to suspend the wire rope nets.
  • the rope ends of the wire rope or wires forming the wire rope net can be used to suspend the wire rope nets.
  • the warning device of the present safety system not only detects damage to the wire rope network Safety system that have resulted in an interruption of the quiescent current flowing through the conductors in the wire ropes forming the wire rope networks or a short circuit in the voltage applied between these conductors and the wire ropes or wire rope networks, but also in the event of minor damage, such as over the elastic range Extensions at one or more points of the wire rope network (s) or, for example, local deformations of the rope cross-section of the wire rope forming the wire rope network and other overloads of the safety system, which do not yet result in the breakage of one of the wire rope forming the rope, responds.
  • rockfalls and avalanches can be determined in this way, which are caught by the security system without causing serious damage to the security system, and such findings are important inasmuch as falling rockfalls or avalanches represent a basic load on the security system, which can be resilient for subsequent users Stone chips or avalanches are reduced and therefore the risk of overloading or collapse of parts of the system in the event of subsequent stone chips or avalanches may be considerably increased.
  • the detection of stone chips or avalanches that have been caught is therefore also a signal to inspect the system and, if necessary , to remove the basic pollution mentioned.
  • Warning sign indicating avalanche danger
  • a flashing light is switched on or other measures are taken to reduce the risk for the users of the traffic route. It is therefore particularly advantageous for remote safety systems that are not constantly under surveillance if the warning device responds not only to an interruption of the above-mentioned quiescent current or short-circuit of the stated voltage but also to sudden, significant changes in the absolute values of these quantities and if such changes occur immediately
  • the following closed-circuit current interruption or voltage short-circuit in the alarm system triggers a pre-alarm, which indicates damage and overstressing of the security system, which have not or have not yet led to a closed-circuit current interruption or a voltage short-circuit.
  • Such a change in the absolute value of a voltage applied between the wire cable network and conductors via a high resistance occurs, for example, in the event of a strong mechanical impact on the cable network, in the form of a decaying voltage oscillation superimposed on the rest voltage.
  • the voltage oscillation may be due to short-term changes in capacitance between the cable network and the conductor caused by the mechanical shock, while the current oscillation is likely to be caused by a change in inductance due to the displacement of the ferromagnetic material surrounding the conductor relative to the conductor during the mechanical shock.
  • superimposed electrical vibrations can be measured and can therefore be used as a response criterion.
  • the alarm system should expediently include devices for automatically blocking the traffic route when an alarm is triggered.
  • This further training has the essential advantage that the risk of falling onto falling rockfalls or avalanches is practically completely eliminated.
  • the system consists essentially of the wire rope network 1 with support means 2 and 3 for suspension thereof, the warning device 4, the alarm system 5 and the connecting line 6 between the warning device and alarm system.
  • the wire rope network 1 ' consists in detail of a relatively strong first wire rope 7 forming the network frame, a somewhat weaker second wire rope 8 forming the actual network, a connecting element 9 at each node of the network for connecting the intersecting sections of the wire rope 8 , two spacers 10 on the lower corner loops 11 and 12 of the first wire rope 7 forming the net frame and a clamping member 13 for closing the corner loop 11 by non-positive connection of the rope ends of this first wire rope 7.
  • the second wire rope 8 forming the actual net is in the form of a sectionally in each case at a 45 ° angle to the sides of the network frame formed by the first wire rope 7 from one loop of the wire rope 7 to the next and at each loop point angled at approximately a right angle so that the actual network of a single continuous wire rope, namely the wire rope 8, ge is forming.
  • the wire rope. net 1 is suspended from the two hooks 2 with the two upper eok loops 14 of the first wire rope 7 and hooked into the two anchors 3 with the two lower eokso loops 11 and 12 of the wire rope 7.
  • Both that the network frame and the corner loops for hanging or hanging the wire rope network 1 forming the first wire rope 7 as well as the actual network forming the second wire rope 8 is provided with an insulated electrical conductor arranged in the core of the wire rope.
  • the electrical conductors 15 and 16 arranged in the wire cables 7 and 8 in FIG. 1 are visible at the cable ends led into the warning device 4, where the conductors 15 and 16 come out of the wire cables 7 and 8, respectively.
  • the electrical conductors 15 and 16 are connected in series by the intermediate connection 17, and this series connection is connected via the main winding 18 and the contact 19 of the closed-circuit current relay 20 to the two-pole connecting line 6 between the warning device and the alarm system.
  • the quiescent current relay 20 is also provided with a secondary winding 21, the number of windings and winding resistance of which coincide with that of the main winding 18 and which is preferably wound on the coil form of the relay together with the main winding in the manner of a bifilar winding.
  • This secondary winding 21 is connected on the one hand to the connection between the main winding 18 and contact 19 and on the other hand to the two wire ropes 7 and 8 forming the wire rope network 1 or to the wires forming these wire ropes and poled so that when current flows through the secondary winding 21, the self-retention the relay-directed effect of the current flowing through the main winding 18 is canceled.
  • Sohliesslioh contains the warning device 4 still a schal parallel to the contact 19 of the closed-circuit relay 20 Teten start switch 22 for short-term bridging of the contact 19 when the safety system is switched on at the start of operation or the same is switched on again after the removal of damage which has led to the interruption of the closed-circuit current and thus to the relay 20 dropping out.
  • the connecting line 6 leads to the alarm system 5, which in the present case essentially consists of a bridge circuit 23 with a current source 24 above the one diagonal of the bridge and a bell 25 or a siren above the other diagonal of the bridge, in which a bridge branch from the connection line 6 and the warning device 4 connected to it and the wire cable network 1 connected to it or from the resistor 26 shown in dashed lines in FIG. 1, the connecting line 6, warning device 4 and the cable network 1 together, and the remaining bridge branches are formed by fixed resistors 28 and 29 .
  • the size of the fixed resistors 27, 28 and 29 is selected so that the bridge circuit 23 is balanced when the safety system is in operation.
  • the two fixed resistors 27 and 28 are preferably of the same size, and the size of the fixed resistor 29 corresponds to the sum of the winding resistance of the main winding 18 of the relay 20 and the line resistances of the two conductors 15 and 16 and the connecting line 6.
  • the mode of operation cer shown in FIG. 1 is as follows: when the safety system is in operation, the lock bracket 23 is according to the above the versions compared and the voltage on the bell 25 is therefore zero, ie the bell 25 is switched off when the safety system is intact.
  • the connection line 6 is supplied with a bias current in this case, the warning device 4, the 18 of the self-sustaining with this quiescent current bias current relay 20, and then disposed in the warning device 4 via the contact 19 and the main winding through the inside of the wire cables 7 and 8, in Series connected electrical conductors 16 and 15 flows.
  • the electrical conductor arranged in the relevant wire rope also tears at these points , and thus the quiescent current flowing through the series-connected electrical conductors 15 and 16 is generally interrupted. With this interruption of the quiescent current, the main winding 18 of the quiescent current relay 20 is de-energized, and thus the relay drops out and the contact 19 opens.
  • an electromagnetic relay 20 is used as in FIG. 1, the decay time can be reduced by making the winding resistance as large as possible or by making the ratio of winding inductance to winding resistance as small as possible; in any case, the winding resistance of the windings 18 and 21 should be substantially greater than the resistance of the conductors 15 and 16 connected in series and should be at least 10 times, preferably more than 100 times the same.
  • the security system in Fig. 1 instead of the one wire rope network 1 shown there, several wire rope networks may also be provided, in which case the insulated electrical conductors arranged within the individual wire rope networks would then have to be connected in series, so that they all flow through the same quiescent current supplied via the connecting line 6.
  • the individual wire rope nets can also have a rectangular shape instead of the approximately square shape shown in FIG. 1, and finally it is also possible to construct an entire fence or an entire fence from a single, very elongated one To form wire rope net.
  • security systems with.
  • a larger number of wire rope nets with electrical conductors connected in series is, however, suitable for the construction of wire rope nets shown schematically in FIG. 2 with two meandering lines laid in the form of intersecting lines Wire ropes 30 and 31 as well as a net frame 32 made of a self-contained wire rope somewhat better, because with such a construction of the individual wire rope nets the nets arranged next to one another to form a fence or gate can be connected much more easily; because, as shown in FIG.
  • the two wire ropes 30 and 31 forming the wire rope network begin at the two ends of one side of the network and end at the two ends of the opposite side of the network, so that in the case of networks arranged side by side, the conductors of the same Place wire ropes coming out of neighboring networks can be directly connected to each other.
  • the warning device 4 can be further simplified there by omitting the relay 20 including the contact 19 and the start switch 22 and instead only the one in FIG. 1 via the contact 19 and the main winding 18 of the relay 20 is connected to the conductor 16, the pole of the connecting line 6 is connected to the conductor 16 via a resistor which is large in relation to the newspaper resistance of the series-connected conductors 15 and 16, and also to the connection point between this pole and the said large resistance, the wire rope network 1 or the wire ropes 7 and 8 are connected.
  • FIGS. 3 to 7 show an exemplary embodiment of such a security system which already responds to slight damage and overloading of the wire cable networks or their suspensions.
  • This safety system serves, as can be seen in FIG. 3, to secure Bergstrasse 33 against the penetration of falling rocks falling into gorge 34 as far as this street.
  • a series of elongated wire rope nets A to M are staggered in the gorge 34 in front of Bergstrasse 33 in such a way that stone chips from the front nets A and M, B and L, and C and K are not absorbed but only with energy loss is guided into a kind of funnel, which is formed by the nets A to D and K to M and catches rockfalls of normal strength without any damage to the nets.
  • the warning device 35 of the security system shown in the block diagram in FIG. 4 is designed such that, firstly, it not only responds to the response criteria already used in the security system in FIG.
  • response circuits 37A to 37M assigned to the individual networks A to M for each network there is firstly a broken rope in the network or its suspension with the response criterion "interruption of the quiescent current flowing through the conductors in the wire cables forming the network and / or short circuit between one of these conductors and the wire cable network "and secondly strong mechanical impacts on the network with the response criterion” voltage fluctuations of the voltage lying between the conductor and the cable network exceeding a predetermined threshold value "and via the assigned channel of said radio connection between warning device 35 and alarm system 36 to the assigned receiving circuit in FIG Alarm system 36 transmitted, and by means of the receiving circuits 38A to 38M assigned to the individual networks A to M, for each network are separately with a first display device 39 "broken rope in the network or its suspension” and with a second display direction.40 "Strong mechanical impacts on the network” if the corresponding response criteria are present in the assigned response circuit.
  • the pairs of display devices 39 and 40 assigned to the individual networks A to M can advantageously be arranged in the same way as the networks A to M in FIG. 3 and consist of differently colored lamps, for example a red lamp for rope breakage in the assigned network and a yellow lamp for mechanical impacts on the assigned network.
  • a red lamp for rope breakage in the assigned network for example a red lamp for rope breakage in the assigned network
  • a yellow lamp for mechanical impacts on the assigned network On a scoreboard constructed like this with the nets
  • the lamp pairs arranged in Fig. 3 can be seen at a glance the entire situation in the event of a rock fall: the yellow lamps on the board indicate which nets the rock fall has hit, and any red lamps that light up indicate damaged nets where either the Net itself or its suspension is torn.
  • the mode of operation of the cleaning system shown in FIGS. 3 to 7 can be described with reference to the following.
  • the address circuit 37 shown in FIG Connections 41 and 42 connected to the two ends of the insulated electrical conductor or the series-connected conductor of the assigned network and with the connection 43 to the wire cables of the assigned network.
  • the voltage source 44 drives, via the high-resistance value 45, a quiescent current flowing through the low-resistance conductor or the series-connected conductors of the assigned network and, at the same time, applies a voltage across the high-resistance resistor 46 of the same size as that of the resistor 45 to the wire cables of the assigned network the conductor located within these wire ropes.
  • the voltage drop across the resistor 45 is approximately + U and across the resistor 46 is zero if .U denotes the level of the voltage of the voltage source 44.
  • the input voltage of the diode circuit 47 to earth is therefore normally + U .. If a rope break occurs in the assigned network, then the input voltage of the diode circuit 47 changes.
  • the input voltage of the diode circuit 47 to earth which is normally + U, therefore becomes zero or negative in the event of a cable break in the assigned network, so that the diode circuit 47 is blocked in the assigned network in the event of a cable break and thus the one connected to the output of the diode circuit 47, for example Relay 48 in the form of a flip-flop changes from its normal 1 state to the 0 state. With this transition to the 0 state, the relay 48 switches off the generator 49, which in the normal case, that is to say if the assigned network is undamaged, outputs a fundamental frequency characteristic of the assigned network via the modulator 50 to the output line 51.
  • this fundamental frequency on the output line 51 therefore indicates that the associated cable network is intact is, while a lack of this fundamental frequency on the output line 51 is the sign of a rope break in the associated wire rope network or its suspension.
  • the inverter 52 which in the 0 state of the relay 48, that is to say in the event of a rope break in the associated network, outputs a current to the output line 53, while in the 1 state of the relay 48, that is in the case of an undamaged assigned network, does not deliver such electricity.
  • the amplifier 54, the threshold circuit 55, the generator 56 and also the decoupler diode 57 are also provided in the trigger circuit 37 to determine strong mechanical impacts on the associated network, which do not result in a cable break in the network or its suspension.
  • the input of the amplifier 54 is located above the resistor 46, through which a current flows when the voltage between the wire rope and the conductor of the associated network vibrates due to strong mechanical impacts on the network which is proportional to the voltage oscillation superimposed on the rest voltage between the wire rope and the conductor and causes a voltage drop corresponding to this voltage oscillation at the resistor 46.
  • the positive half-waves of the voltage oscillation falling across the resistor 46 are amplified by the amplifier 54 and fed to the threshold circuit 55 which, when a certain threshold value of the energy content of the amplified half-waves is exceeded, emits an output signal which switches the generator 56 on and also via the decoupler. Diode 57 of the output line 58 is supplied.
  • the generator 56 to the modulator 50 a fixed frequency f s with which the fundamental frequency f o emitted by the generator 49 is modulated, so that the fundamental frequency and the two frequencies f o + f s and f o - obtained by the modulation are then on the output line 51.
  • f s stand.
  • the Anspreehscrien 37 are thus a total of at undamaged and no bumps Exposed to an associated network via the output line 51 the fundamental frequency f o and the other two output lines 53 and 58 not in severe mechanical shocks on the associated network via the output line 51, the frequencies f o, f o + f s and f o + f s and via the output line 58 said output signal of the threshold circuit 55 and nothing via the output line 53 and finally in the event of a broken rope in the associated network or its suspension via the output line 51 depending on the construction of the modulator 50 either nothing or only the frequency f s and via the output line 53 the current supplied by the inverter 52 and via the output line 58 the output signal of the threshold circuit 55.
  • the device sizes output via the output lines of the response circuits 37A to 37M assigned to the individual networks A to M are processed in the warning device 35 as follows:
  • the output lines 51 of the response circuits 37A to 37M lead to a transmitting device 59, which via a transmitting device 59 with a transmitting antenna 60 in the warning device 35 and the receiver 61 with receiving antenna 62 in the alarm system 36 comprising a conventional radio connection between the warning device 35 and the alarm system 36 all on the input side via the output lines 51 transmits the frequencies supplied to the response circuits 37A to 37M on a carrier band to the receiver 61 in the alarm system 36, to the output side of which the reception circuits 38A to 38M assigned to the individual networks A to, M are connected.
  • the output lines 53 of the response circuits 37A to 37M are interconnected, as shown in FIG. 4, and lead to the relay 63, which is designed, for example, in the manner of a flip-flop and which is in the 0 state when the intact fuse system is in operation and in FIGS -Status changes as soon as a cable break occurs in one of the networks A to M or as soon as inverter 52 outputs one of the response circuits 37A to 37M current via lines 53 and 64 to the input of relay 63 and thus to the input resistance of relay 63 the required breakover voltage is generated for switching the same.
  • the relay 63 switches the signal systems 66 to "red” via the lines 65 and thus blocks the road section 67 of the Bergstrasse 33 which is at risk of falling rockfall.
  • the output lines 58 of the response circuits 37A to 37M are, as shown in FIG 4 shows, also interconnected, and lead to the relay 68, which is designed, for example, in the manner of a flip-flop and which, when the safety system is in operation and intact and not subjected to shocks, is also in the 0 state and changes to the 1 state as soon as one the networks A to M receive a strong mechanical shock or as soon as one of the response circuits 37A to 37M receives an output signal from the Sohwell value circuit 55 via the assigned decoupler diode 57 and lines 58 and 69 are delivered to the input of relay 68.
  • the relay 68 switches on via the lines 70 the turn signal systems 71 arranged on the Bergstrasse 33 in front of the signal systems 66, which - possibly in connection with traffic signs indicating possible rockfall - to the increased risk of falling rockfall Draw attention and call for a careful driving style or increased caution when passing the section 67 at risk of falling rocks.
  • the receiving circuits 38A to 38M assigned to the individual networks A to M are supplied with the carrier tape transmitted from the transmitting device 59 to the receiver 61 via the radio connection mentioned.
  • the frequency range of the lower sideband of the carrier frequency f t which contains the fundamental frequency f o characteristic of the assigned network and the frequency (f t -f o -f s ) to the frequency (f t -f o -f s ), and the output signal of the bandpass filter 73 is then demodulated in the demodolator 74 and thus converted into the frequency range f o ⁇ f s .
  • the fundamental frequency f is then - if present - filtered out by means of the filter 75 and the frequency f o -f s by means of the filter 76.
  • the output signal of the filter 75 is then fed to the inverter 77 on the input side, and furthermore the output signals of both filters 75 and 76 become the same on the input side directing AND circuit 78 supplied.
  • the inverter 77 On the output side, the inverter 77 only emits a signal if the fundamental frequency f o , which is normally present, that is to say in the case of an undamaged associated network, is eliminated, i.e. when the generator 49 is switched off in the assigned response circuit or, in the event of a cable break in the assigned network or its suspension, but also when the radio connection between the warning device 35 and the alarm system 36 is interrupted.
  • a signal emitted by the inverter 77 on the output side is first of all the display device 39 already mentioned above and secondly via the decoupler di 79 and the output line 80 and the line 81 supplied to the alastic alarm device 82 and causes the alarm device 82 to be switched on - if it is not already in the switched-on state due to a corresponding signal from another reception position - and also the switching on of the display device 39 and thus, for example, as already mentioned by lighting up n a red lamp used as a display element, the display of the network in which the rope break occurred.
  • the AND circuit 78 On the output side, the AND circuit 78 'emits a signal when the frequency f o is at its input connected to the filter 75 and the frequency f o -f s is at its input connected to the filter 76, that is to say when generators 49 and are switched on 56 in the assigned response circuit or in the event of a strong mechanical impact on the assigned network, provided that this is still undamaged at the moment of the impact or has no broken rope.
  • a signal emitted by the AND circuit 78 on the output side becomes firstly to the above-mentioned display device 40 and secondly via the decoupling diode 83 and the output line 84 and the line 85 to the pre-alarm signaling device, either optical or also acoustically alarming device 86, and causes the alarming device 86 to be complied with - if this is not already due of a corresponding signal from another receiving circuit is in the switched-on state - and also the switching on of the display device 40 and thus, for example, as already mentioned by the lighting up of a yellow lamp used as a display element, the display of the network which was subjected to the strong mechanical shock.
  • the display devices 39 and 40 of the receiving stations 38A to 38M assigned to the individual networks A to M and also the two alarm devices 82 and 86 provided for the main alarm and pre-alarm can expediently be designed in such a way that they are switched on even if the output signal of the inverter, which causes the same, is lost 77 or the AND circuit 78 remain switched on and can only be switched off manually by the surveillance personnel of the alarm system 36.
  • this has the advantage that the information provided by these devices cannot be lost until they have been noticed by the surveillance personnel, and secondly, with such a design, a short-term failure of the radio connection between warning device 35 and alarm system 36 can also be established , because if this radio connection fails, the inverters 77 give all receiving stops 38A to 38M as a result of the loss of yours caused by the radio connection failure.
  • Input signal to the respectively assigned display device 39 and the alarm device 82 emits a signal which causes these devices to be switched on, so that in the event of a radio connection failure an alarm is given and all "red lamps” light up, and in the case of said configuration this state does not disappear immediately after a short-term radio connection failure again but remains until he and thus the short-term radio connection failure has been noted by the surveillance personnel of the alarm system 36; The surveillance personnel then manually reverses this state and, if necessary, takes the measures necessary to ensure that the radio connection is maintained.
  • security systems according to the invention are not only suitable for protecting objects against arbitrary or violent unlawful interventions, for example in form, as in the above exemplary embodiments for protecting objects against natural events, but also - as also briefly indicated above of fences or complete enclosures of the object to be secured with wire rope nets designed according to the present invention.
  • a building to be secured can be provided with a fence, which, in a manner similar to the security system in FIGS. 3 to 7, is composed of a larger number of wire rope nets which are separately connected to the warning device and therefore not only to detect an illegal intervention allows, but also immediately recognizes the approximate location of the fence at which the illegal intervention takes place, and therefore enables targeted countermeasures.
  • a similar ' result can also be achieved with a fence, which consists only of a single, very elongated wire rope network or of a large number of wire rope networks, the insulated electrical conductors of which are all connected in series, by the warning device through the electrical conductor or the consecutive electrical conductors are sent impulses and reflections of these impulses returning to the starting point are determined and from the time elapsed between the transmission of the impulse and reception of the reflected impulse the point of reflection and thus the point of the illegal intervention is determined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Emergency Alarm Devices (AREA)
  • Emergency Lowering Means (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Ropes Or Cables (AREA)
  • Burglar Alarm Systems (AREA)
EP80102286A 1979-05-05 1980-04-28 Installation de sécurité avec au moins un filet métallique pour la protection d'objets placés derrière cette installation Expired EP0018619B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102286T ATE3729T1 (de) 1979-05-05 1980-04-28 Sicherungsanlage zur sicherung von hinter derselben gelegenen objekten mit mindestens einem drahtseilnetz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH420779A CH637435A5 (de) 1979-05-05 1979-05-05 Sicherungsanlage zur sicherung von hinter derselben gelegenen objekten mit mindestens einem drahtseilnetz.
CH4207/79 1979-05-05

Publications (2)

Publication Number Publication Date
EP0018619A1 true EP0018619A1 (fr) 1980-11-12
EP0018619B1 EP0018619B1 (fr) 1983-06-08

Family

ID=4271790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102286A Expired EP0018619B1 (fr) 1979-05-05 1980-04-28 Installation de sécurité avec au moins un filet métallique pour la protection d'objets placés derrière cette installation

Country Status (4)

Country Link
EP (1) EP0018619B1 (fr)
AT (1) ATE3729T1 (fr)
CH (1) CH637435A5 (fr)
DE (1) DE3063657D1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447783A (en) * 2007-03-20 2008-09-24 Hill & Smith Ltd Perimeter security barrier
WO2008132654A1 (fr) * 2007-04-27 2008-11-06 Officine Maccaferri S.P.A. Filet de protection amélioré, notamment un filet contre la neige ou les rochers, et un procédé particulièrement approprié pour sa fabrication
ES2325469A1 (es) * 2009-01-22 2009-09-04 Representaciones Tecnologicas Para Obras Publicas, S.L. Dispositivo para la deteccion de caida de elementos.
US9458584B2 (en) 2007-03-20 2016-10-04 Hill & Smith Limited Perimeter security barriers
CN109637084A (zh) * 2019-01-29 2019-04-16 中国建筑第八工程局有限公司 用于索网操作平台的报警装置及其使用方法
IT201800007671A1 (it) * 2018-07-31 2020-01-31 Luca Maffeo Albertelli Sistema e metodo di monitoraggio di rischio idrogeologico
US20200283972A1 (en) * 2016-11-27 2020-09-10 Amos Klein Protective structure
CN112342945A (zh) * 2020-10-29 2021-02-09 温州联睿工业产品设计有限公司 一种具有自动报警功能的公路路基防滑坡装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AP2040A (en) 2003-10-22 2009-09-07 Maccaferri Spa Off A protective wire net, a protective structure constructed with the net, and the use of the protective wire net for the construction of a protective structure
DE102004027976B4 (de) * 2004-06-08 2012-02-09 Thomas Meisel Messverfahren und Sensorsystem zur Registrierung von Schadensereignissen an Sicherungsnetzen
DE102006060480A1 (de) * 2006-12-19 2008-06-26 Inglas Innovative Glassysteme Gmbh & Co. Kg Sensor und Überwachungsvorrichtung zur Überwachung von Objekten

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278646A (en) * 1969-06-19 1972-06-21 Shorrock Dev Protective barrier
FR2373655A1 (fr) * 1976-12-13 1978-07-07 Blaser Ernst Cloture de treillis a mailles de fil metallique tresse pour installations de grande securite

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278646A (en) * 1969-06-19 1972-06-21 Shorrock Dev Protective barrier
FR2373655A1 (fr) * 1976-12-13 1978-07-07 Blaser Ernst Cloture de treillis a mailles de fil metallique tresse pour installations de grande securite

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
REVUE GENERALE DES CHEMINS DE FER, Band 90, April 1971, Paris, FR, R. NICOLAS et al.: "L'electrification Mulhouse-Dole", Seiten 290-297 * Seite 296, linke Spalte, Zeile 22 bis Seite 297, linke Spalte Zeile 13; Figuren 7, 8 * *
REVUE GENERALE DES CHEMINS DE FER, Band 96, Dezember 1977, Paris, FR, J. COUVERT: "L'eboulement d'eze entre Nice et Menton", Seiten 652-661 * Seite 659, rechte Spalte, Zeile 4 bis Seite 660, linke Spalte, Zeile 16; Figur 7 * *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447783A (en) * 2007-03-20 2008-09-24 Hill & Smith Ltd Perimeter security barrier
GB2447783B (en) * 2007-03-20 2012-03-07 Hill & Smith Ltd Perimeter Security barriers
US9458584B2 (en) 2007-03-20 2016-10-04 Hill & Smith Limited Perimeter security barriers
WO2008132654A1 (fr) * 2007-04-27 2008-11-06 Officine Maccaferri S.P.A. Filet de protection amélioré, notamment un filet contre la neige ou les rochers, et un procédé particulièrement approprié pour sa fabrication
ES2325469A1 (es) * 2009-01-22 2009-09-04 Representaciones Tecnologicas Para Obras Publicas, S.L. Dispositivo para la deteccion de caida de elementos.
US20200283972A1 (en) * 2016-11-27 2020-09-10 Amos Klein Protective structure
US10968580B2 (en) * 2016-11-27 2021-04-06 Amos Klein Protective structure
IT201800007671A1 (it) * 2018-07-31 2020-01-31 Luca Maffeo Albertelli Sistema e metodo di monitoraggio di rischio idrogeologico
WO2020026137A1 (fr) * 2018-07-31 2020-02-06 Nesa S.R.L. Système et procédé de surveillance du risque hydrogéologique
CN109637084A (zh) * 2019-01-29 2019-04-16 中国建筑第八工程局有限公司 用于索网操作平台的报警装置及其使用方法
CN112342945A (zh) * 2020-10-29 2021-02-09 温州联睿工业产品设计有限公司 一种具有自动报警功能的公路路基防滑坡装置

Also Published As

Publication number Publication date
CH637435A5 (de) 1983-07-29
ATE3729T1 (de) 1983-06-15
EP0018619B1 (fr) 1983-06-08
DE3063657D1 (en) 1983-07-14

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