Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
  • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
  • G08B25/016—Personal emergency signalling and security systems

Definitions

• the present invention relates to a radio teletransmission method and systems for the control of a signaling device such as a siren with a view in particular to a call for help.
• a system which comprises a buzzer or a siren which can be controlled directly by a fixed button or by several fixed buttons arranged in different places, buttons which are connected to the buzzer by electrical wires.
• This known system has two main drawbacks. Because the fixed buttons are connected to the buzzer by wires, the cost of installation is very high. In addition, due to the fact that the ringer control buttons are fixed, the control of this system is difficult to access, in particular in the event of physical impairments or assaults, the person not necessarily being near a control buttons.
• a system which does not use wire connections but which comprises a portable transmitter provided with a monostable push button which instantaneously activates the bell or siren.
• This system like the previous system, moreover, has the drawback of being able to be triggered inadvertently so that false alarms can occur.
• the present invention aims in particular to remedy these drawbacks. It relates in fact to a method and systems for the control of a signaling device such as a siren or the control of a particular telephone link for a call for help, which can advantageously be used by isolated people, the elderly, by people who are assaulted or by people performing dangerous work, and even by people in a state of panic, while having good immunity against nuisance tripping.
• the present invention therefore relates first of all to a method for controlling a signaling device such as a siren. This process is such that the signaling device is activated following an order, that the signaling device is cut if this order is interrupted within a determined period of time and that the signaling device is activated. according to an autonomous control cycle if said order is maintained at least during said period of time.
• said autonomous control cycle of the signaling device can advantageously include spaced outages during which the signaling device is not actuated and that this cycle can only be interrupted during or after the first outage upon receipt an acknowledgment order.
• said autonomous control cycle of the signaling device can comprise a first continuous actuation phase of the signaling device and a second cyclic actuation phase having breaks.
• the present invention also relates to a radio teletransmission system for the remote control of a signaling device such as a siren, for implementing the above method.
• the system includes a portable transmitting device including a radio transmitter, a receiving device including a receiver responsive to radio waves, and a controller capable of interpreting the received signals and operating the signaling device.
• the portable transmitting device comprises a control member with two stable positions which can be actuated manually between these two positions, one of these positions corresponding to the emission of a signal giving the order of actuation of the signaling device and the maintaining in this position of said control member for at least said period of time conditioning the engagement of the signaling device according to said autonomous control cycle.
• the system according to the present invention can have several variants.
• the portable transmitting device may include means capable of generating a signal on its transmitter when said control member is in its transmitting position, the control device comprising means for actuating the signaling device when the signal is received by the reception device and means for actuating the signaling device according to said autonomous control cycle at the end of said period of time.
• the portable transmitting device can comprise means capable of generating on its transmitter a first signal when said control member is in its transmitting position and means capable of generating a second signal at the end of said lapse determined time for maintaining said control member in its transmitting position, the control device comprising means for actuating the signaling device at. receiving said first signal by the receiving device and for actuating the signaling device according to said autonomous control cycle upon receipt of said second signal by the receiving device.
• control device of the signaling device preferably comprises means capable of operating the signaling device in successive on-off mode during said autonomous control cycle.
• control device preferably comprises means for acknowledging the signaling device only during or after the first cut.
• control device preferably also comprises a control member with two stable positions which can be actuated manually between these two positions, one of the positions corresponding to an order of actuation of the signaling device and the maintenance of this control member in this position for at least said determined period of time conditioning the activation of the signaling device according to said autonomous control cycle.
• control members associated directly with the control device of the signaling device.
• the portable transmitting device can comprise a built-in acoustic signaling means which can be actuated when said control member of the transmitting device is in its transmitting position.
• the portable transmission device can also include timing means capable of delaying the engagement of said built-in acoustic signaling means, in order to be able to trigger the autonomous control cycle, in particular in the event of aggression, without signaling the aggressor the position of the assailant, the latter bringing the control member to the stop position before the routing of said incorporated signaling means.
• timing means capable of delaying the engagement of said built-in acoustic signaling means, in order to be able to trigger the autonomous control cycle, in particular in the event of aggression, without signaling the aggressor the position of the assailant, the latter bringing the control member to the stop position before the routing of said incorporated signaling means.
• the present invention provides a receiver, of a particular type, low consumer of electrical energy.
• this receiver is of the super-reaction type and comprises a super-reaction oscillator stage sensitive to radio waves and a mixed stage amplifying and detecting the signals coming from the super-reaction stage, this mixed stage being such that it is traversed by a current independent of the supply voltage and that it is electrically connected in series between the poles of the power supply with the super-reaction oscillator stage, the oscillator stage and the mixed stage being consequently traversed by the same mean current independent of the supply voltage.
• FIG. 2 shows a second alternative embodiment of the system according to the present invention
• FIG. 3a and 3b illustrate the mode of operation of the system according to Figure 1;
• FIG. 5 represents the diagram of a receiver of particular structure with low consumption of electrical energy
• the alarm or call for help system represented in FIG. 1 and generally identified by reference 1 comprises a portable transmitting device generally identified by reference 2 and a device reception and control generally identified by the reference 3 capable of actuating a signaling device such as a siren 4.
• the elements forming the portable transmitting device 2 can be mounted in a small portable housing not shown in the figure.
• the reception and control device 3 as well as the siren 4 are fixed but can be provided transportable.
• the portable transmission device 2 comprises a high frequency transmitter 5 responsible for generating a radio wave which is modulated by the signals coming from a coding device 6.
• This coding device makes it possible to introduce a code into the radio wave. which can be either logical or analog and which aims to distinguish the radio wave from noise and parasites and from other neighboring emission devices.
• the portable transmission device 2 also comprises a timing circuit 7 which is connected to the transmitter 5 in order to block it and which is connected to an acoustic signaling device 8 incorporated in said housing, this incorporated acoustic signaling device being able to be trained by a buzzer.
• the emission device 2 further comprises an electrical power source 9 formed by a battery or a battery 10 which supplies said elements of the emission device via a bistable slide switch 11.
• the transmission device 2 operates in the following manner, When the bistable switch 11 is manually pushed into its closed or on position, the transmitter 5 instantly generates a radio wave modulated in accordance with the code generated by the coding device 5, it stops transmitting either if the switch is returned to its initial cut or stop position, thirsty for a blocking order which it receives from the timing circuit 7 at the end of '' a specific emission time. This blocking order is also used to control the start-up of the buzzer 8 after a delay corresponding to the delay time of the delay circuit following the actuation of the switch 11.
• the device 3 includes a radio wave receiver 12, a decoding device 13 capable of decoding the signals received by the receiver 12 and of recognizing the modulation of the radio wave coming from the transmitter 5 of the transmission device 2 to confirm the order received and transmit this order to a circuit.
• command generally identified by reference 14 responsible for generating the siren 4 control signals as a function of the time characteristics of the order received.
• the output of the decoding device 13 is connected to the input of an OR gate 15, the output of which is connected to one of the inputs of an OR gate 16 with three inputs, the output of this OR gate 16 being connected to the input for actuating the siren 4.
• the output of the OR gate 15 is also connected to the input of a delay circuit 37 whose output is connected to the interlock input of a storage circuit 38,
• the output of the storage circuit 38 is connected to a second input of the OR gate 36 by means of a monostable 39 generating at its output a signal of fixed duration and to the third input of the OR gate 36 by l through an alternating signal generator 20.
• the output of the OR gate 16 is also connected to the acknowledgment or cancellation input of the storage circuit 18 by means of an inverter 23, a push button 22 and a monostable or derivative 23 supplying at its output the pulse necessary for acknowledging the memory of the storage circuit 18.
• the purpose of the differentiator 23 is not to inhibit the operation of the control circuit 34 if the push button 22 is actuated continuously.
• the device 3 also comprises a bistable slide switch with manual control 24 which, when it is in one of its positions, provides the OR gate 15 with a signal equivalent to that from the decoding device 33, by means of a monostable 24a, the holding time of which is greater than the duration of the time delay of the time delay circuit 37, this monostable 24a falling instantly if the switch is returned to slide in its initial or open position.
• FIGS. 3a and 3b we will now describe how the alarm or call-to-aid system 1 represented in FIG. 3 works.
• the transmitter 5 If, as we have seen previously, the switch 33 is pushed into its on or transmission position, the transmitter 5 generates a coded electric wave which is picked up by the receiver 12 and which is validated by the decoding device 33.
• This decoding device 13 directly supplies a control signal from the siren 4 via the OR gate 35 and the OR gate 36.
• the transmitter stops transmitting and consequently the coding device no longer supplies a control signal from the siren 4,
• This operating mode is illustrated on the. FIG. 3a in which it can be seen that the operating time of the siren is equal to the time during which the slide switch 11 has been left in its on or emission position. If, on the contrary, at the end of time t 1, the slide switch 1 1 has not been brought back to its stop position, the delay circuit 37 of the control device 34 sends an activation signal to the storage circuit 18 which then autonomously controls the siren 4 according to an autonomous control cycle as follows.
• the monostable 39 and the alternating signal generator 20 are switched on.
• the output signals of the monostable 19 and of the alternating signal generator 20 are overlap and the siren 4 is actuated continuously in accordance with the monostable 19.
• this monostable drops down and the siren 4 is then actuated on-off alternately in accordance with the cycle of the alternating signal generator 20.
• the transmitter 5 stops transmitting after a time t 3 less than the time t 1 plus t 2 so as not to disturb the alternating cycle of control of the siren 4. It is the timing circuit 7 which fixes this duration t 3 which at the end of this duration blocks the transmitter 5 and starts the buzzer 8.
• FIG. 3b shows an emission time part t 3 of the transmitter 5 and on the other hand the actuation cycle of the siren 4.
• the duration of engagement of the monostable 24a is preferably less than t 1 plus t 2 .
• a control cycle of the siren 4 aims in a first phase to effectively call for help and for example to flee an attacker by a continuous alert while the second phase of alternating cycle aims to limit the energy consumption necessary to activate the siren 4 to be able to make a long-term call even if the power source is formed by a battery or batteries .
• the time t 1 during which one can test the system or guard against false alarms could be between two to six seconds and that the continuous activation time of the siren 4 corresponding to the time t 1 plus t 2 could be between one and three minutes while the alternating cycle could alternately include a running period of five to ten seconds and a switching off period about a minute.
• the push button 22 could be replaced by a common slide switch which, at the same time as the diverter 23, actuates the monostable 24a.
• This slide switch could thus also be used as a control device for the siren 4 according to the time cycle seen previously, in the same way as the slide switches II and 24.
• the acknowledgment of the storage circuit, after switching on of the latter, will be at the transition from the open state to the closed state of this common slide switch.
• the portable transmission device generally identified by the reference 27 of the alarm or call for help system 25 comprises, as before, a transmitter 28, a coding device 29 capable of this time supply two different codes according to the state in which the output of a timing circuit 30 is located, the duration of the timing of which corresponds to time t 1 , a manual slide switch 33, a power source 32 formed for example by a battery or a battery and an acoustic signaling device such as a buzzer 33 started by means of a timing circuit 34 which this time has no influence on the transmitter 28 and the duration of the delay can be determined in any way.
• the switch 31 is connected to the input of the coding device 29 and to the input of the timer 20, the output of which is connected to the input of the device 29 controlling the generator of said codes.
• the transmission device 27 also comprises a monostable or pulse generator 35, the output of which is connected to the transmitter 28 and which makes it possible to limit the duration of the emission of this transmitter and the input of which is connected to the output of a door
• the slide switch 31 is connected to one of the inputs of the door 36 by means of a short-term diverter or monostable 37 and the output of the timing circuit 30 is connected to the other input of the OR gate 36 by means of a diverter 38.
• the alarm or call for help system 25 includes, like the alarm or call for help system shown in FIG. 1, a reception and control device 39 for the siren 26.
• This device 39 includes a receiver 40 and a decoding device 43 capable of interpreting the signals coming from the receiver 40 and decoding the two coded signals coming from the transmitter 28 and a control circuit generally identified by the reference 42 actuating the siren 26.
• This circuit 42 comprises an OR gate 43 with three inputs, one of the inputs of which is connected by a line 43a to the output of the decoding device 43 corresponding to the first coded signal and the output of which is connected to the siren 26.
• This circuit 42 comprises, as before, a storage circuit 44 whose interlocking input is connected by a line 41b directly to the output of the decoding device 43 corresponding to the second coded signal and whose output is connected to the two inputs of the OR gate 43 respectively by means of a monostable generating a signal for actuating the siren 26 of duration t 2 and by means of an alternating signal generator 46.
• the output of the OR gate 43 is connected to the acknowledgment or cancellation input of the storage circuit 44 by means of an inverter 47, a push button 48 and a monostable or derivative 49,
• the alarm or call for help system 25 shown in Figure 2 operates as follows.
• the transmitter 28 When the slide switch 33 is pushed to its closed position, the transmitter 28 instantaneously transmits a radio wave coded according to the first code generated by the coding device 29.
• the duration of transmission of this radio wave is limited by the monostable 35 which had been engaged when the switch 31 was closed by means of the differentiator 37 and the OR gate 36.
• the receiver 40 picks up the electric wave emitted by the transmitter 28 which is validated by the decoder 41, the latter directly supplies an actuation signal from the siren 26 via the line 41a and the OR gate 43, siren which operates during the time of emission of the radio wave corresponding to the first coded signal.
• This operating mode is represented in FIG. 4a where it can be seen that the operating time of the siren 26 corresponds to the transmission time of the first signal coded by the transmitter 28.
• the switch 31 On the other hand, if at the end of time t 1 , the switch 31 has not been returned to its initial position, the output of the timing circuit 30 changes state and consequently the coding device 29 generates a second signal different from the first he transmits to the transmitter 28. A radio wave corresponding to this second signal is then emitted during the time imposed by the monostable 35 which has been engaged during the change of state of the output of the timing circuit 30 via diverter 38 and OR gate 36.
• the receiver 40 picks up this radio wave which is validated by the decoding device 43 which transmits by the line 43b a signal for switching on the storage circuit 44.
• this storage circuit actuates the siren 26 by 'through the monostable 45 and the alternating signal generator 46 through the OR gate 43.
• the transmitter 28 transmits two radio waves 50 and 51 coded differently and spaced apart by a duration t 1 and that the siren operates first during a time corresponding to the emission of the radioelectric wave 50 then, at the end of time t 1 , according to a successive on-off cycle, with a first long phase corresponding to the switching-on time of the monostable 45 and a second phase alternating imposed by the alternating signal generator 46, in the same manner as in the previous example.
• a receiver will now be described in general by the reference 52, a receiver which is designed with the aim of consuming little electrical energy and which could advantageously form the receiver 32 of the alarm or call for help 3 or the receiver 40 of the alarm or call for help system 25 represented in FIGS. 1 and 2, in particular if one wishes to make autonomous systems from the point of view power supply using batteries or cells.
• the receiver 52 includes an antenna 53 picking up radio waves which is connected via a capacitor 54 at the end of an inductor 55, the other end of which is connected to ground,
• This inductor 55 is magnetically coupled to an oscillating circuit composed of an inductor 56 and a capacitor 57 connected in parallel, and connected between the base and the collector of an oscillator transistor 58 whose emitter is connected to ground.
• An intermediate socket on the inductor 56 is connected to an inductor 59 which, with a capacitor 60 mounted between the other end of the seif 59 and the ground, allows the transistor 58 to oscillate and to be periodically blocked according to the principle of super reaction.
• This super-reaction oscillator stage 52a is supplied at the common point between the inductor 59 and the capacitor 60 by a constant current generator stage 52b formed by the transistor 61 whose emitter is connected to said common point, of a resistor 62 mounted between the base and the emitter of transistor 63 and imposing the value of constant current, of transistor 63 whose emitter is connected to the base of transistor 61 and to resistor 62 and whose base is connected to the collector of transistor 63.
• the collector of transistor 63 and the base of transistor 63 are connected at most to the power supply by a resistor 64.
• the collector of transistor 63 is connected at most to the power supply by a resistor 65 which determines the charge of this transistor.
• This constant current generator stage 52a also serves as an amplifier of the signals coming from the super-feedback oscillator 52a, by virtue of the decoupling of the base of the transistor 63 and of the emitter of the transistor 63 by the capacitor 65 which is connected to its other end to ground.
• a capacitor 67 connected between the collector of transistor 63 and ground makes it possible to detect the amplified signals which are then available on line 68 which starts from the common point between the collector of transistor 63, the resistor 65 and the capacitor 67.
• this line 68 will be connected to the input of the decoding device 33 of the system 1 or to the input of the decoding device 41 of the system 25.

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• Engineering & Computer Science (AREA)
• Computer Security & Cryptography (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Alarm Systems (AREA)
• Selective Calling Equipment (AREA)
• Transceivers (AREA)

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• 1981
  • 1981-12-24 FR FR8124203A patent/FR2519167B1/fr not_active Expired
• 1982
  • 1982-12-21 EP EP83900044A patent/EP0097661B1/de not_active Expired
  • 1982-12-21 WO PCT/FR1982/000217 patent/WO1983002350A1/en active IP Right Grant
  • 1982-12-21 DE DE8383900044T patent/DE3276504D1/de not_active Expired
  • 1982-12-23 IT IT24946/82A patent/IT1153872B/it active

Non-Patent Citations (1)

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