FR2977701A1 - METHOD FOR STARTING AN OPTIMIZING ANTI-INTRUSION SMOKE GENERATOR WITH TRIGGER SUPERVISION AND DEVICE USING SUCH A METHOD - Google Patents

Abstract

The present invention relates to a method of starting an anti-intrusion apparatus by applying a predefined quantity of electricity, the method comprising the following steps: a first step of accumulating energy from a source to reach at least a predetermined accumulated energy threshold, as long as the accumulated energy level remains greater than or equal to said threshold, a second step of delivering the accumulated energy to the anti-intrusion apparatus under the shape of a discharge current, before feeding and starting the anti-intrusion apparatus, amplifying the discharge current so as to reach the predefined quantity of electricity, and measuring the resistance of the anti-intruder apparatus -Intrusion so as to verify the start of this anti-intrusion device.

Description

TECHNICAL FIELD The invention relates to an anti-intrusion device whose activation requires an electric discharge during a certain period of time. duration. The present invention relates to a method for starting an anti-extrusion apparatus, in particular an opacifying smoke generator such as a smoke generator. It also relates to a device implementing such a method. It finds a particularly innovative application in the field of remote telemonitoring. In both the residential and professional sectors, many systems are known for securing buildings. The old systems allowed the detection of an intruder in the premises and then only the triggering of an alarm siren, sometimes a smoke trigger automatic. The latter are triggered only by means of a detector, without verification by removal of human doubt or remote control by an operator and are therefore subject to nuisance tripping and false manipulation. We know the system Médiaveil incorporating in the premises a system of intercom and video including microphone, speaker and camera connected to a remote monitoring site. In this system, when an intrusion is detected, an operator located in the remote monitoring site listens and / or visualizes the premises in question then calls the intruder asking for a password or the amount to leave the premises, s it does not execute, the operator remotely triggers an anti-extrusion opacifying fog. This device causes a thick nontoxic and non-messy fog that escapes the intruder instantaneously by totally obscuring the visibility in the protected site until the arrival of the police and security agents. Indeed, this opacifying fog is effective only if it is triggered remotely by a remote monitoring agent from the Security Center in charge of the protection of the site and after audio / video verification of the intrusion. The subscriber is thus certain that the fog will only be triggered in the event of a confirmed break-in and not for a false alarm or manipulation error. This smoke is hitherto wired for its power supply and tripping. PRIOR ART In a known manner, an anti-intrusion apparatus can be activated by applying to its terminals an electric discharge necessary for its activation, said discharge being provided by a supply supplying this discharge. A major disadvantage of this method is the physical volume occupied by this power supply. This volume increases as the required discharge increases. EP 1 296 300 issued by the company Médiaveil® discloses a method and a system for starting an anti-intrusion apparatus that can be controlled by an electric discharge. The disadvantage of this system is the presence of a cumbersome power supply capable of providing sufficient voltage to obtain a current sufficient to turn on an anti-intrusion apparatus. This necessity imposes the use of a bulky energy source, which is therefore unsightly and cumbersome, and / or a source of energy permanently connected to the mains (230V): this makes the system vulnerable in the event of an unsightly mains failure. made of electrical cable passages. 25 Presentation of the invention

The object of the invention is to overcome the disadvantages of the prior art by proposing a solution that consumes little energy in order to start an anti-intrusion apparatus. Another object of the invention is to provide a radio and / or autonomous device with a reliable start of the anti-intrusion device. Another object of the invention is a space-saving, discrete and compact system for starting an anti-extrusion apparatus. Another object of the invention is to eliminate any risk of cutting or sabotage of its power supply and its connection to the alarm control unit preventing its triggering.

At least one of the above-mentioned objectives is achieved with a method of starting an anti-intrusion apparatus by applying a predefined quantity of electricity, i.e., an intensity for a given duration; this method comprising the following steps: a first step of accumulation of energy from a source of energy until reaching at least a predetermined threshold of accumulated energy, as long as the accumulated energy level remains greater than or equal to said threshold, a second step of delivering the energy accumulated to the anti-extrusion apparatus in the form of a discharge current, and - before supplying and starting the anti-intrusion apparatus, amplification of the discharge current so as to reach the predefined amount of electricity. This method can be implemented in a boot card. According to an advantageous characteristic of the invention: the first step may consist in carrying out the charging of a capacity for a predetermined duration; and the second step may consist in carrying out the effective discharge of the capacitance, this capacitance discharging weakly in a natural manner, said control being carried out in a time window during which the charge of the capacitance is sufficient to start the apparatus.

According to the invention, the effective discharge current of the capacitor is amplified before supplying the apparatus with a current of sufficient value for a period of time sufficient to start up the apparatus. Advantageously, the triggering of the anti-intrusion apparatus is made possible by the presence of the capacitance in the priming card, the amplification of the current and the short time required to start the apparatus. Preferably, the anti-intrusion apparatus according to the invention is an opacifying smoke generator such as a smoke generator. Subsequently, one will quote independently "smoke generator" or "fumigene". In a so-called radio operating mode, the power source may be a battery or an accumulator. In general, smoke-type burglar alarm devices require a 12V supply capable of triggering a pyrotechnic igniter within the smoke generator. This igniter ignites a powder that generates ejected smoke. The 12V voltage usually comes from the mains via a transformer, which can be unsightly. The present invention allows the use of a fumigant in autonomous radio mode where the supply voltage delivering a low voltage less than 12V would be a small battery, sufficient and easily integrated / embedded in a small integrated wireless box, providing a aesthetic advantage while becoming invulnerable sabotage by cutting the power supply wire or connection to the alarm center.

In a so-called wired mode of operation, the energy source delivers a very low voltage voltage TBT especially less than 50V, derived indirectly for example from a mains supply.

According to an advantageous characteristic of the invention, the discharge current is amplified by an order of magnitude. In other words, the current to power the apparatus will be substantially equal to ten times the current delivered by the power source (feeding the starter card).

According to another advantageous characteristic of the invention, the discharge current is amplified so as to reach a value of 1 amperes for 2 ms or 3 amperes for ims. According to another advantageous characteristic of the invention, the energy source delivers a current substantially equal to 105 mA.

According to another advantageous characteristic of the invention, the energy source delivers a voltage of less than 12V. According to another advantageous characteristic of the invention, the energy source delivers a voltage of between 3 and 6 V. In the case of a battery, the voltage of a supply decreasing over time, it is possible to provide that the boot card remains operational even in a critical operating mode where the voltage is close to a failure threshold, such as for example 3.06 V for a battery of 4 V.

According to another advantageous characteristic of the invention, the discharge current is amplified using a Darlington circuit. A Darlington fixture is the combination of two bipolar transistors of the same type (both NPNs or both PNPs), resulting in a hybrid component that still has characteristics of a transistor. The current gain of the Darlington is equal to the product of the gains of each transistor.

According to another advantageous characteristic of the invention, the resistance of the anti-intrusion apparatus is also measured in such a way as to verify the start of this anti-intrusion apparatus. In other words, to verify that the fumigant has tripped well, the resistance of the branch on which the smoke was placed is measured, this resistance must have an infinite value. Indeed, the triggering of a smoke is equivalent to cutting a conductive filament disposed on a branch of a detection circuit of the local monitoring station.

According to another aspect of the invention, there is further provided a device 25 for starting an anti-intrusion apparatus by applying a predefined quantity of electricity. This device may be a priming card for implementing the method according to the invention and comprises a charge stage comprising a capacitance and a charge resistor and a discharge stage comprising a current amplifier 30 for discharging the charge. accumulated charge in the capacitance to the anti-extrusion apparatus in response to a discharge instruction. The priming card is used to power the intruder against a current of sufficient value for a sufficient period of time. 2977701 -6 This device may further include a Darlington fixture whose transmitter is connected to the capacitor, the collector is connected to the intruder, the base is connected to an assembly including a resistor to fix the base current to a minimum value connected in series to a diode to prevent charging of the capacitance via the setpoint circuit, which set is also connected to a setpoint input of the device, a resistor also being connected in parallel between the transmitter and the base said Darlington fixture. Advantageously, a Darlington mount takes up less space than a single, more powerful transistor that might otherwise require a heat sink.

This device may further comprise in its charge stage a Schottky diode connected in series with the charging resistor to prevent the discharge of the capacitor when the device is no longer powered.

This device may further include a parallel resistance of the capacitance to provide a natural discharge. This resistor is preferably selected with high resistance in order to obtain a significant time constant, ie a discharge of very slow capacity.

The device can also be located closer to the device. This can be done in order to avoid power losses due to too long cabling. Description of figures

Other advantages and particularities of the invention will appear on reading the detailed description of implementations and embodiments which are in no way limitative, and the following appended drawings: FIG. 1 illustrates a first device embodiment according to FIG. invention; FIG. 2 illustrates an overall representation of a protection system in which the device according to the invention is integrated. Firstly, with reference to FIG. 1, a first embodiment of a device for starting an anti-intrusion device that can be controlled by an electric discharge by means of a card will be described first. boot. 5 On the Error! Source of the return not found. is shown in more detail the boot card which is an electronic card 1 according to the invention. There is a capacitance C1 capable of being charged by a DC voltage supplied by a power source or power supply (ALIM) via a load resistor R3, the purpose of which is to limit the charging current of the capacitor C1. when an operator installed in a remote monitoring site receives information of the presence of an intruder by detectors (not shown) connected to a local monitoring station, this operator may deem it necessary to trigger a smoke generator 2 connected to the terminals S , OUT.

In general, the boot card has two stages: a load stage and a discharge stage. The load stage is an RC circuit having as input the nodes A and M respectively connected to a power supply connector ALIM and to a ground connector GND. The output is constituted by the nodes E and M. Between the nodes A and E, one distinguishes a diode CRI in series with the resistance R3. The anode of the CRI diode is arranged on the power supply side. This diode is advantageously a Schottky diode. Between the nodes E and M of the load stage, the capacitance C1 is distinguished in parallel with a resistor R4. The discharge stage comprises an input represented by the nodes E and D, the two stages are therefore connected to the node E. The output of this stage is represented by the nodes C and D. The amplification function is performed by a Darlington type arrangement disposed between the EBC nodes. The Darlington transmitter, base and collector correspond to the EBC nodes respectively. Other types of amplifiers can be used instead of Darlington. Only one more powerful transistor could be used, the use of field effect transistor is also possible. Any circuitry for amplifying the current may be used. A resistor R1 is arranged between the nodes E and B. Between the nodes B and D, there is a resistor R5 in series with a diode CR2, the cathode of the diode CR2 being arranged on the output side D. The stage of The discharge C is advantageously controlled via a CMD input connector 5 connected to the node D. The output C of the discharge stage supplies the smoke generator 2 via an output connector S of the priming card 1. This smoke generator 2 is a dipole which is also connected to the ground of the boot card 1 via an output connector OUT. There is also another STATUS input connector connected to the node C of the boot card. The input connectors ALIM, GND, CMD and STATUS are intended to be connected to a processing unit integrating in particular an intelligence 4 of the microprocessor or microcontroller type as well as a power supply. The power supply may be a battery 5 capable of supplying the processing unit 3 and the priming card 1. This power supply may also be via a mains power supply (not shown). The processing unit 3 also comprises wired or wireless communication means with a remote control unit or not. In wireless mode, it is a wireless transceiver 6 connected to an antenna 7 as shown in FIG. 1. FIG. 2 shows an overall representation of a protection system in which integrates the device according to the invention. There is a monitoring center 8 where there are surveillance agents. This center may be equipped with surveillance screens and any means of communication with a plurality of premises under surveillance. The local 9 under surveillance is connected to the monitoring center 8 via a communication network type telephone connection, PSTN, Internet, GSM or other. Within the room 9 is installed a monitoring station 10 30 communicating wired (not shown) or not with a plurality of anti-intrusion systems 11, 12 of the type of the assembly 1, 2 and 3 of Figure 1. The monitoring station 10 serves in particular as a relay between the anti-intrusion systems and the monitoring center. When an intrusion is detected in the zone of one of the systems 11 or 12, the decision to trigger the smoke associated with each system comes from the control unit 2977701 -9 monitoring 10, especially from the monitoring center 8. The detection can be done by means of detectors 13 and 14 connected (in wired mode or in wireless radio mode) to the central unit 10 and associated respectively with the systems 11 and 12. Referring to FIG. 1, the load and the discharge of the Cl capacity.

Charging the capacity In order to charge the capacitor C1, a supply voltage is supplied via the input ALIM. The input provides a voltage substantially equal to 4.08 V. It is also possible to use batteries with a value between 3 and 6 V. Moreover, a voltage such that no current can flow through the resistor R5 is supplied to the entry level CMD. This voltage must be greater than or equal to the supply voltage minus the threshold voltage of the diode CR2. The function of the diode CR2 is to prevent charging of the capacitor C1 via the control circuit. The CR2 diode acts as a switch. When in an open circuit, the voltage drop across the resistor R1 must not allow Darlington ECB conduction. In this way the current draw is avoided by the node E. The capacitance can thus be charged freely without leakage of current towards the node E. The Schottky diode CRI serves to prevent the discharge of the capacitor C1 when the power supply (ALIM) is stopped. Resistor R3 serves to limit the charging current. The capacitor C1 then charges up to a voltage equal to the supply voltage supplied, minus the voltage drop across the diode CRI and the resistor R3. When the resistor R3 is 39 S2, at the power supply connection, the current is i = 4.08V / 39Q = 105mA. When Cl has a capacity of 6800 microfarads, the charging time of Cl is 0.8s. The capacitance Cl is a current reservoir that will be discharged into the smoke initiator head at the moment of tripping.

Discharge of Capacity When the ALIM supply is stopped, the capacitance Cl naturally discharges through the resistor R4. This resistance has a high resistance to obtain a large discharge time constant. One can choose 100 k52 for this one. Capacitance C1 also discharges when a current flows through resistor R5. This result is obtained by lowering the potential at the control terminal CMD. The purpose of the resistor R5 is to set the minimum current at the beginning of the discharge of capacitance C1. A resistor of 2052 is chosen to set a minimum current of 10 mA.

The Darlington assembly obtained by the transistors Q1, Q2 greatly amplifies the current flowing through the node C. The following specifications can be used for the two transistors: capacitor Q1: PNP power transistor, reference ZTX1149A of the brand Zetex for example; capacitor Q2: PNP transistor associated with Q1, driving Q1, reference BC327 for example.

This triggers the anti-intrusion device connected to the S and OUT terminals. When the intruder is a smoke, it is equivalent to a resistance of 1.6 52 which cuts off when triggered. It can be triggered when traversed for at least 2 milliseconds by a current of 1 ampere or for 1 millisecond by a current of 3 amps. An operator can verify that the trip actually occurred when the smoke-containing branch has infinite resistance. This can be verified via the STATUS channel. The tripping of the fumigant therefore requires a charge and a discharge of the capacitor. Moreover, the duration between the two actions can not exceed a certain predetermined time, in which case the voltage drop on the control channel would have no effect, because of the natural discharge of the capacitor via the resistor R4, the capacitor being too discharged to provide a sufficient current, despite the presence of the current amplifier that constitute the two transistors. In a wired mode, the charging and discharging actions follow instructions from the central unit 10. In a radio mode where the anti-intrusion system 1, 2 and 3 is autonomously powered and operates from semi-autonomous way, the end of the charge of the capacitor will be systematically followed by the automatic tripping command after a predetermined period, ie the voluntary discharge of the capacitor and thus the start of the anti-condensation device. intrusion. As a result, the resistor R4 can be suppressed in this mode. Indeed, this resistor allows the capacitor Cl to discharge if the smoke tripping control is not given by the operator of the monitoring center after listening and questioning when it clears the doubt of the alarm. This saves energy at the power supply of the boot card. In the radio operating mode where each system 11 and 12 is powered autonomously, the action of the load follows an instruction from the central unit 10. On the other hand, the discharge is systematic.

Of course, the invention is not limited to the examples which have just been described and many adjustments can be made to these examples without departing from the scope of the invention.

Claims (16)

REVENDICATIONS1. A method of starting an anti-intrusion apparatus comprising a resistor, by applying a predefined quantity of electricity, the method comprising the following steps: a first step of accumulating energy from a source of energy until at least a predetermined accumulated energy threshold is reached, as long as the accumulated energy level remains greater than or equal to said threshold, a second step of delivering the accumulated energy to the anti-extrusion apparatus under the form of a discharge current, - before feeding and starting the anti-intrusion apparatus, amplification of the discharge current so as to reach the predefined quantity of electricity, and - the resistance of the apparatus is measured anti-intrusion so as to check the activation of this anti-intrusion device. 2. Method according to claim 1, characterized in that in a so-called radio operating mode, the energy source is a battery or an accumulator. 3. Method according to claim 1, characterized in that in a so-called wired operating mode, the energy source delivers a very low voltage voltage TBT from a mains power supply. 4. Method according to any one of the preceding claims, characterized in that: - the first step consists in carrying out the charging of a capacity for a predetermined duration; and the second step consists in realizing the effective discharge of the capacitance, this capacitance discharging weakly in a natural manner, said control being carried out in a time window during which the charge of the capacitance is sufficient to start the apparatus. 2977701 -13- 5. Method according to any one of the preceding claims, characterized in that amplifies the discharge current by an order of magnitude. 5 6. Method according to any one of the preceding claims, characterized in that amplifies the discharge current to reach a value of 1 ampere for 2 ms or 3 amps for 1 ms. 7. Method according to any one of the preceding claims, characterized in that the energy source delivers a current substantially equal to 105 mA. 8. Method according to any one of the preceding claims, characterized in that the energy source delivers a voltage of less than 12V. 9. Method according to any one of the preceding claims, characterized in that the energy source delivers a voltage of between 3 and 6V. 10. Method according to any one of the preceding claims, characterized in that amplifies the discharge current Darlington mounting. 25 11. Method according to any one of the preceding claims, characterized in that the anti-intrusion device is an opacifying smoke generator. An apparatus for starting an intruder apparatus comprising a resistor, by applying a predefined quantity of electricity, said apparatus comprising: a load stage comprising a capacitance and a load resistor; a discharge stage comprising a current amplifier for discharging the charge accumulated in the capacitance to the anti-intrusion apparatus in response to a discharge set point, and for supplying the anti-intrusion apparatus with a sufficient current for a sufficient period of time and arranged to measure the resistance of the anti-intrusion apparatus so as to verify the start of this anti-intrusion apparatus. 13. Device according to claim 12, characterized in that the current amplifier comprises a Darlington mounting whose emitter is connected to the capacitor, the collector is connected to the anti-intrusion apparatus, the base is connected to an set comprising a resistor for setting the base current to a minimum value connected in series with a diode to prevent charging of the capacitance via the setpoint circuit, which set is also connected to a setpoint input of the device, a resistor also being connected in parallel between the transmitter and the base of said Darlington circuit. Apparatus according to any one of claims 12 or 13, characterized in that the charging stage further comprises a Schottky diode connected in series with the charging resistor to prevent capacitor discharge when the device is not connected. more fueled. 15. Device according to one of claims 12 to 14, characterized in that the current required to start the apparatus is an order of magnitude higher than the supply current. 16. Device according to any one of claims 12 to 15, characterized in that the anti-intrusion device is an opacifying smoke generator. 25