EP0146664A1 - Personal device for parking time control - Google Patents

Personal device for parking time control Download PDF

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Publication number
EP0146664A1
EP0146664A1 EP83810622A EP83810622A EP0146664A1 EP 0146664 A1 EP0146664 A1 EP 0146664A1 EP 83810622 A EP83810622 A EP 83810622A EP 83810622 A EP83810622 A EP 83810622A EP 0146664 A1 EP0146664 A1 EP 0146664A1
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EP
European Patent Office
Prior art keywords
time
vehicle
day
parking
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83810622A
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German (de)
French (fr)
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EP0146664B1 (en
Inventor
Martial Racine
Rudolf Schaffer
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to EP83810622A priority Critical patent/EP0146664B1/en
Priority to DE8383810622T priority patent/DE3373375D1/en
Priority to AT83810622T priority patent/ATE29322T1/en
Publication of EP0146664A1 publication Critical patent/EP0146664A1/en
Application granted granted Critical
Publication of EP0146664B1 publication Critical patent/EP0146664B1/en
Expired legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
    • G04F1/005—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers using electronic timing, e.g. counting means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G15/00—Time-pieces comprising means to be operated at preselected times or after preselected time intervals
    • G04G15/003—Time-pieces comprising means to be operated at preselected times or after preselected time intervals acting only at one preselected time or during one adjustable time interval
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/30—Parking meters

Definitions

  • the present invention relates to an individual parking duration control device, comprising an electronic device for determining and displaying the end of an authorized parking period as a function of the arrival time of a motorist, and a warning device to inform this motorist of the imminent expiration of the said period.
  • a parking time signaling device comprising a time measurement device and means for displaying this time.
  • a manual interlocking device for a counter and a warning device to inform the motorist of the approaching end of the parking time to which he is entitled.
  • the counter starts at the first full hour or half an hour following the moment when the user acted on the manual interlocking member, i.e. at the moment when the motorist arrives at the parking place , and counts down a predetermined time interval, for example 3/4 of an hour, before activating the audible and luminous warning signal.
  • This device does not replace a parking disc since it does not permanently indicate the end time for authorized parking. It is intended to accompany the motorist who has left his vehicle on the parking area. It is essential that the motorist thinks of switching on his device when leaving the vehicle.
  • German patent application No. 28 51 596 which includes a device for displaying the arrival time and a device for displaying the departure time, these two values being separated by a constant time interval.
  • This device does not take into account the particularities of the parking rule in a restricted area, for example in a blue area, where a range of arrival times corresponds to a single departure time, the real time interval between arrival and the departure being variable according to the actual arrival time and the location of this arrival time within the arrival time range.
  • the present invention proposes to overcome the drawbacks mentioned above by making a simple device, which engages automatically when the vehicle stops in a parking space, and which comprises both an electronic device remaining inside the vehicle and functioning as a disc traditional parking and a warning device which accompanies the motorist to inform him of the approach of the end of the authorized parking period.
  • the apparatus according to the invention is characterized in that said electronic device is provided with a device emitting a signal linked to said authorized parking period, and in that said warning device is equipped with a organ receiving the signal emitted by the transmitter, a unit for processing the information contained in this signal and an organ transmitting an alarm signal controlled by said processing unit, arranged to emit said alarm signal before l expiration of the authorized parking period.
  • the electronic device for determining and displaying the end of an authorized parking period comprises a clock powered permanently by a current source making it possible to have the time of day at any time, a circuit electronics connected to this clock and comprising registers in which is stored at least one correspondence table intended to correspond to the time of day or, to a range of hours of the day, a predetermined hour or fraction of an hour, and means for displaying said predetermined hour or fraction of an hour corresponding to said hour of the day or range of hours of the day.
  • This electronic device advantageously includes means for detecting the immobilization of the vehicle, these means being arranged to initiate the operation consisting in matching the hour of the day or range of hours of the day, said hour or fraction of an hour predetermined.
  • vehicle immobilization detection means preferably include an accelerometer. However, they can also be associated with the vehicle contactor.
  • said electronic device preferably comprises at least one source of ultrasonic pulses.
  • the illustrated appliance consists of two elements, which are, on the one hand, the electronic device 10 for detecting and displaying the end of an authorized parking period, intended to remain inside the vehicle and, on the other hand, the warning device 11 to inform this motorist of the imminent expiration of said period, intended to accompany the motorist when he leaves his parked vehicle.
  • the electronic device 10 which will be described in more detail with reference to FIG. 2, essentially comprises a circuit 12 for measuring time and determining the hour or fraction of a predetermined hour defining the end of the authorized parking period, a display member 13 for indicating the time of arrival as well as the departure time, and a device 14 transmitting a signal linked to said authorized parking period.
  • the device 10 is permanently supplied by a voltage source 15 which can be constituted by the vehicle battery or by an independent source.
  • the emitting member 14 is preferably constituted by a piezoelectric transducer designed to emit a signal in the form of trains of ultrasonic pulses.
  • the train of ultrasonic pulses generated by the circuit 12 consists of a long packet of ultrasonic pulses marking the start of the sequence, followed by a number of packets of equal length, but of lower value than the first.
  • the number of pulse packets which constitute the code is for example equal to the number of minutes separating the time of day from the start time displayed on the display member 13, for example reduced by a typical value of five minutes, divided by five and rounded down to the nearest whole number.
  • the departure time determined by circuit 12
  • the number of minutes between arrival time and departure time minus five minutes is 158 minutes.
  • the number of pulse packets is thirty-one, that is, the result of dividing 158 by 5 rounded down.
  • the warning device 11 comprises a receiving member 16 arranged to receive the signal emitted by the transmitting member 14.
  • This member is preferably constituted by a transducer designed to convert the ultrasonic pulses picked up into electrical pulses emitted at the output 17 of the 'receiving member 16.
  • These pulses are transmitted to a filter 18 whose tuning frequency is equal to the frequency of the pulses generated by the circuit 12, so as to eliminate the parasitic pulses.
  • the pulses filtered by the filter 18 are transmitted to the input of an amplifier 19 whose role is to bring their level to a value sufficient to allow their subsequent processing by a logic circuit.
  • An envelope detector 20 is connected to the output of the amplifier 19 and makes it possible to restore, from pulse packets corresponding to the ultrasonic pulse trains, a pulse train of defined length.
  • the output of the envelope detector 20 is on the one hand connected to a logic circuit 21 and on the other hand to one of the inputs of an AND gate 22.
  • the logic circuit 21 comprising in particular a pulse duration discriminator, supplies a signal on its output 23 when a pulse of length at least equal to that of the nominal initial pulse is received by the receiving member 16.
  • the output 23 of the logic circuit is connected to the other input of the door 22.
  • Another output 24 is connected to a counter 25 and makes it possible to transmit to this counter a reset pulse whose presence is linked to the signal transmitted to the output 23 and which will be used to reset counter 1a in a well defined state, enabling it to receive a signal co 'sponding to a new pulse train.
  • a third output 26 of the logic circuit 21 is connected to an input of a flip-flop 27 to allow as secure the locking of a member 28 emitting a warning signal which may for example consist of an audible, tactile or light alarm signal.
  • the AND gate 22 transmits loading signals from the counter 25 only when the logic circuit 21 emits a signal, called the validity signal, at the output 23.
  • a divider element 29 comprises for example a quartz oscillator followed by several divider circuits making it possible to have well-defined frequency signals, used respectively by the various components to which it is connected.
  • One of the frequencies available at the output of the dividing element 29 corresponds for example to a pulse every five minutes, which is directly linked to the input 32 of the counter 25 to cause the counting of the value loaded by means of the train of pulses, which will have the effect, in the absence of new loads, of bringing the state of the counter to zero after a time counted in minutes, equal to the number loaded multiplied by five.
  • This zero state corresponds to the appearance of a signal emitted at the output 33 of the counter 25, this signal being intended for the alarm generated by the member 28 emitting a warning signal.
  • the signal emitted at the output 33 of the counter causes a change of state of the flip-flop 27, the output of which is connected to the logic circuit 31 serving to select an audible frequency, a slow pulse and a limit duration of the alarm at through these connections with the divider element 29.
  • the corresponding signal is sent to an amplifier 34 directly connected to the member 28.
  • a switch 35 constituted for example by a push button, makes it possible to interrupt the warning signal at will. sound or light or turn off the alarm entirely.
  • the transmitter 14 and the receiver 16 are designed such that the range of the information transmitted from one to the other is relatively small. Indeed, the countdown operation should start as soon as the link between the transmitter 14 and the receiver 16 is interrupted, that is to say when the motorist leaves his parked vehicle.
  • the electronic device for determining and displaying the end of an authorized parking period essentially consists of a microprocessor 40 or an equivalent circuit associated with a clock 41 serving as a time base and supplying in particular the clock signals necessary for the operation of the microprocessor 40, and of a display device 42 arranged to simultaneously display the arrival time or possibly a time interval within which the arrival time and the departure corresponding to the end of the authorized parking time.
  • switches 43 can be brought into contact with corresponding inputs of the microprocessor 40, to allow modification of the internal registers corresponding respectively to tens of hours, hours, tens of minutes and minutes. By these switches, it is possible to reset the time of the device, provided however that the contactor 44 is in a "time setting" position, in which it closes the circuit corresponding to the input 45 of the microprocessor 40.
  • the operating mode of the device can be modified for use based on parking rules different from those of the blue zone, especially those corresponding to the so-called red zone.
  • This mode of use is advantageously displayed by means of an indicator light 47 or any other suitable member fitted to the display device 42.
  • the member 47 is controlled by means of an electrical connection with the microprocessor 40, indicated by line 48.
  • a pilot decoder is mounted, the function of which is to transform a decimal coded information conveyed by the four lines 51 linking the microprocessor 40 to the decoder 50 in a representation in numbers composed using seven segments, the control signals of which are transmitted by the seven lines 52.
  • the display device 42 further comprises a screen 53 on which the departure time is displayed.
  • a demultiplexer 54 mounted between the microprocessor 40 and the display device 42, makes it possible to control the display only with one digit at a time, the use of a multiplexed display mode making it possible to limit the number of electrical connections between the microprocessor 54 and the display device 42.
  • the display device is represented in the form of two screens 49 and 53, it could consist of a single screen, the selection of the figures intended to display the arrival time or departure time being carried out by means of the demultiplexer 54.
  • the integration methods known per se make it possible to combine the functions of the pilot decoder and of the multiplexer or of the pilot decoder, of the multiplexer and of the microprocessor.
  • a stabilizer 55 connected to the microprocessor 40, is intended to stabilize the supply voltage of the source 56 and to bring it to a level sufficient to allow the correct operation of the various components of the system described above.
  • the microprocessor 40 further comprises an input 57, by which an external information is transmitted to it signifying that the vehicle is in motion or at a standstill.
  • This external information is used to control the display of the time of day on the corresponding display screen 49, as well as the control of the display of the departure time determined as a function of the arrival time.
  • This command is carried out at regular intervals, as long as the signal brought to the input 57 indicates that the vehicle is in circulation.
  • this stop being determined by any sensor, such as for example an accelerometer which will be described below with reference to FIG.
  • the external information is no longer transmitted
  • the arrival time displayed on the screen 49 is the time of day when the circulation of the vehicle ended, that is to say the time to which parking begins
  • the starting time displayed on screen 53 is the time calculated by the device and defining the time limit for authorized parking.
  • internal registers, controlled by the clock 41 continue to keep the time of day, so that it can be displayed as mentioned previously when the vehicle is restarted.
  • the microprocessor 40 is programmed in such a way that it functions exactly like a parking disk in the blue zone or in the red zone.
  • the day is divided into a number of time intervals, each of which is linked to a specific time which is the end time for authorized parking.
  • the microprocessor determines in which of these time intervals falls the time of day at which the parking period begins, that is to say the time of arrival of the automobile on the parking area.
  • the microprocessor establishes the correspondence between this time interval and the mandatory start time of the automobile and controls the display of this start time.
  • the input 57 of the microprocessor 40 intended to receive said external information
  • a sensor such as for example an accelerometer capable of determining at any time whether the vehicle is on or off.
  • an accelerometer capable of determining at any time whether the vehicle is on or off.
  • An accelerometer makes it possible to detect the various accelerations and to deduce therefrom whether the vehicle is in traffic, stationary or if it has been subjected to an impact while it was stationary. Such equipment is advantageously used to provide the external information transmitted to the input 57.
  • this equipment consists of a piezoelectric element 60 to which a mass 61 is mechanically linked.
  • This mass is connected to the piezoelectric element 60 in such a way that any accelerated positive or negative ration generates a force capable of elastic deformation of the piezoelectric element.
  • This element is arranged in such a way that its sensitivity to lateral accelerations undergone by the vehicle is extremely low, while the sensitivity to accelerations parallel to the axis of the vehicle is maximum.
  • the deformation of the piezoelectric element develops, in a manner known per se, a potential difference between its electrodes.
  • This potential difference is amplified by an amplifier 62, then filtered by a low-pass type filter 63, the function of which is to eliminate parasitic oscillations and to keep only those which correspond to normal accelerations such as undergoes them. vehicle in normal traffic.
  • the high frequency components caused for example by vibrations of the vehicle when it is parked and another vehicle passes nearby, are eliminated by the filter 63.
  • the signal from the filter 63 is then amplified by a chain of amplifiers comprising for example the two amplifiers 64 and 63.
  • This amplified signal is transmitted to the input of a window comparator constituted by two comparator elements 66 and 67.
  • This comparator makes it possible to define the sign of the alteration suffered by the vehicle.
  • the output of the comparator element 66 will for example be active when the vehicle undergoes a positive acceleration, while the output of the comparator element 67 will in this case be active when the vehicle undergoes a deceleration.
  • the outputs of the two comparator elements are respectively connected to two monostable elements 68 and 69.
  • the corresponding monostable forms a pulse of a certain duration T 1 defined as a function of the time constant of the piezoelectric element 60.
  • This pulse has the effect of inhibiting the monostable element corresponding to the acceleration of contrary signs which is induced by the elasticity of the piezoelectric element. Thanks to the symmetrical mounting of the two monostable elements 68 and 69, each appearance of a first signal corresponding to an acceleration blocks, for a duration T 1 , the signal corresponding to a deceleration.
  • the outputs of the monostable elements 68 and 69 are connected to the inputs of two other monostable elements 70 and 71.
  • the function of these two additional monostable elements 70 and 71 consists in defining the duration of a time interval T 2 greater than T l , during which the device collects information relating to the movements of the vehicle. If, during the time interval T 2 , the device detects at least two accelerations of opposite signs, it will provide, at input 57 of the microprocessor (see fig. 2), external information signifying that the vehicle is in normal circulation . This information is transmitted by means of two AND logic gates 72 and 73.
  • the output of one of the monostable elements 70 or 71 When the output of one of the monostable elements 70 or 71 is activated indirectly by an acceleration of a certain sign, it transmits a validity signal on one of the inputs of the corresponding logic gates 72 or 73. If a signal corresponding to an acceleration of opposite sign appears during the time interval T2 on the other input of the AND logic gate, a signal may be emitted at the output of this gate.
  • the two outputs of logic gates 72 and 73 are connected to the inputs of an OR logic gate 74.
  • the output of logic gate 74 therefore provides a signal whenever at least two accelerations of opposite signs have appeared during the interval time T 2 , thus signaling to the electronic device described above that the vehicle is traveling normally. The absence of acceleration and corresponding signal means that the vehicle is parked.
  • the transmission of the external information signal to the device illustrated in FIG. 2 can be carried out by a direct electrical connection, for example the contactor actuated by the ignition key.
  • the accelerometer of FIG. 3 is integrated into the circuit of FIG. 2.
  • the diagram of the above device could be modified and that certain components or groups of components could be replaced by one or more equivalent components, in particular in the case of the application of integration techniques.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Lock And Its Accessories (AREA)
  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

1. Individual apparatus for checking the duration of parking time of a vehicle, including an electronic device (10) to be left within the vehicle to determine and indicate the end of an authorized period of parking in accordance with the beginning of the parking period, the apparatus also includes a warning device (11) which can be taken out of the vehicle to indicate the imminent expiration of the given period of time, the said electronic device (10) is provided with an emitting device (14) for the signal representing the said authorized parking period, this warning device (11) is equipped with a receptor (16) for the signal emitted by the emitting device (14), and an element (18-27, 29-35) for the treatment of the information contained in the signal and an emitting device (28) for a warning signal, controlled by this element and programmed in such a way as to emit the said warning signal before the expiration of the parking period.

Description

La présente invention concerne un appareil individuel de contrôle de la durée de stationnement, comportant un dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé en fonction de l'heure d'arrivée d'un automobiliste, et un dispositif avertisseur pour informer cet automobiliste de l'expiration imminente de ladite période.The present invention relates to an individual parking duration control device, comprising an electronic device for determining and displaying the end of an authorized parking period as a function of the arrival time of a motorist, and a warning device to inform this motorist of the imminent expiration of the said period.

On connaît déjà divers dispositifs de ce type et notamment celui décrit par le brevet français publié sous le No. 2'478'842 qui concerne un dispositif signalisateur de temps de stationnement, comportant un organe de mesure du temps et des moyens pour afficher ce temps, un organe d'enclenchement manuel d'un compteur et un organe avertisseur pour informer l'automobiliste de l'approche de la fin du temps de stationnement auquel il a droit. Le compteur s'enclenche à la première heure ou demi-heure pleine suivant le moment où l'utilisateur a agi sur l'organe d'enclenchement manuel, c'est-à-dire au moment où l'automobiliste arrive au lieu de parcage, et décompte un intervalle de temps prédéterminé, par exemple 3/4 d'heure, avant d'enclencher le signal avertisseur sonore et lumineux. Ce dispositif ne remplace pas un disque de stationnement puisqu'il n'indique pas de façon permanente l'heure de fin de stationnement autorisé. Il est destiné à accompagner l'automobiliste ayant quitté son véhicule sur l'aire de stationnement. Il est indispensable que l'automobiliste pense à enclencher son appareil au moment de quitter le véhicule.Various devices of this type are already known, and in particular that described by the French patent published under No. 2,478,842 which relates to a parking time signaling device, comprising a time measurement device and means for displaying this time. , a manual interlocking device for a counter and a warning device to inform the motorist of the approaching end of the parking time to which he is entitled. The counter starts at the first full hour or half an hour following the moment when the user acted on the manual interlocking member, i.e. at the moment when the motorist arrives at the parking place , and counts down a predetermined time interval, for example 3/4 of an hour, before activating the audible and luminous warning signal. This device does not replace a parking disc since it does not permanently indicate the end time for authorized parking. It is intended to accompany the motorist who has left his vehicle on the parking area. It is essential that the motorist thinks of switching on his device when leaving the vehicle.

Un autre appareil de surveillance de la durée de stationnement est décrit par la demande de brevet allemand No. 28 51 596 qui comporte un dispositif d'affichage de l'heure d'arrivée et un dispositif d'affichage de l'heure de départ, ces deux valeurs étant séparées par un intervalle de temps constant. Ce dispositif ne tient pas compte des particularités de la règle de stationnement en zone réglementée, par exemple en zone bleue, où une plage d'heures d'arrivée correspond à une seule heure de départ, l'intervalle de temps réel entre l'arrivée et le départ étant variable selon l'heure réelle d'arrivée et la localisation de cette heure d'arrivée à l'intérieur de la plage d'heures d'arrivée.Another parking time monitoring device is described by German patent application No. 28 51 596 which includes a device for displaying the arrival time and a device for displaying the departure time, these two values being separated by a constant time interval. This device does not take into account the particularities of the parking rule in a restricted area, for example in a blue area, where a range of arrival times corresponds to a single departure time, the real time interval between arrival and the departure being variable according to the actual arrival time and the location of this arrival time within the arrival time range.

La présente invention se propose de pallier les inconvénients mentionnés ci-dessus en réalisant un appareil simple, qui s'enclenche automatiquement au moment de l'arrêt du véhicule sur une place de parcage, et qui comporte à la fois un dispositif électronique restant à l'intérieur du véhicule et fonctionnant comme un disque de stationnement traditionnel et un dispositif avertisseur qui accompagne l'automobiliste pour l'informer de l'approche de la fin de la durée de stationnement autorisé.The present invention proposes to overcome the drawbacks mentioned above by making a simple device, which engages automatically when the vehicle stops in a parking space, and which comprises both an electronic device remaining inside the vehicle and functioning as a disc traditional parking and a warning device which accompanies the motorist to inform him of the approach of the end of the authorized parking period.

Dans ce but, l'appareil selon l'invention est caractérisé en ce que ledit dispositif électronique est pourvu d'un organe émetteur d'un signal lié à ladite période de stationnement autorisé , et en ce que ledit dispositif avertisseur est équipé d'un organe récepteur du signal émis par l'émetteur, d'une unité de traitement de l'information contenue dans ce signal et d'un organe émetteur d'un signal avertisseur commandé par ladite unité de traitement, agencé pour émettre ledit signal avertisseur avant l'expiration de la période de stationnement autorisé .For this purpose, the apparatus according to the invention is characterized in that said electronic device is provided with a device emitting a signal linked to said authorized parking period, and in that said warning device is equipped with a organ receiving the signal emitted by the transmitter, a unit for processing the information contained in this signal and an organ transmitting an alarm signal controlled by said processing unit, arranged to emit said alarm signal before l expiration of the authorized parking period.

Selon une forme de réalisation préférée, le dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé comporte une horloge alimentée de façon permanente par une source de courant permettant de disposer à tout moment de l'heure du jour, un circuit électronique connecté à cette horloge et comportant des registres dans lesquels est mémorisée au moins une table de correspondance destinée à faire correspondre à l'heure du jour ou, à une plage d'heures du jour, une heure ou fraction d'heure prédéterminée, et des moyens pour afficher ladite heure ou fraction d'heure prédéterminée correspondant à ladite heure du jour ou plage d'heures du jour.According to a preferred embodiment, the electronic device for determining and displaying the end of an authorized parking period comprises a clock powered permanently by a current source making it possible to have the time of day at any time, a circuit electronics connected to this clock and comprising registers in which is stored at least one correspondence table intended to correspond to the time of day or, to a range of hours of the day, a predetermined hour or fraction of an hour, and means for displaying said predetermined hour or fraction of an hour corresponding to said hour of the day or range of hours of the day.

Ce dispositif électronique comporte avantageusement des moyens de détection de l'immobilisation du véhicule, ces moyens étant agencés pour enclencher l'opération consistant à faire correspondre à l'heure du jour ou plage d'heures du jour, ladite heure ou fraction d'heure prédéterminée. Ces moyens de détection de l'immobilisation du véhicule comportent de préférence un accéléromètre. Toutefois, ils peuvent également être associés au contacteur du véhicule.This electronic device advantageously includes means for detecting the immobilization of the vehicle, these means being arranged to initiate the operation consisting in matching the hour of the day or range of hours of the day, said hour or fraction of an hour predetermined. These vehicle immobilization detection means preferably include an accelerometer. However, they can also be associated with the vehicle contactor.

Pour permettre au dispositif électronique d'émettre un signal lié à ladite période de stationnement autorisé , susceptible d'être capté par le dispositif avertisseur, ledit dispositif électronique comporte de préférence au moins une source d'impulsions ultra-soniques.To allow the electronic device to emit a signal linked to said authorized parking period, capable of being picked up by the device said electronic device preferably comprises at least one source of ultrasonic pulses.

La présente invention, ses caractéristiques et ses principaux avantages seront mieux compris en référence à la description d'un exemple de réalisation et du dessin annexé, dans lequel :

  • La figure 1 représente une vue schématique de l'appareil selon l'invention,
  • La figure 2 représente une vue schématique plus détaillée du dispositif électronique conçu pour déterminer et afficher la fin d'une période de stationnement autorisé , qui constitue l'un des composants de l'appareil selon la fig. 1, et
  • La figure 3 représente une vue schématique d'une partie d'une variante du dispositif électronique de la fig. 1.
The present invention, its characteristics and its main advantages will be better understood with reference to the description of an exemplary embodiment and the attached drawing, in which:
  • FIG. 1 represents a schematic view of the apparatus according to the invention,
  • FIG. 2 represents a more detailed schematic view of the electronic device designed to determine and display the end of an authorized parking period, which constitutes one of the components of the device according to FIG. 1, and
  • FIG. 3 represents a schematic view of part of a variant of the electronic device of FIG. 1.

En référence à la fig. 1, l'appareil illustré se compose de deux éléments, qui sont, d'une part le dispositif électronique 10 pour détecter et afficher la fin d'une période de stationnement autorisé , destiné à rester à l'intérieur du véhicule et, d'autre part, le dispositif avertisseur 11 pour informer cet automobiliste de l'expiration imminente de ladite période, destiné à accompagner l'automobiliste lorsqu'il quitte son véhicule en stationnement. Le dispositif électronique 10 qui sera décrit plus en détail en référence à la fig. 2, comprend essentiellement un circuit 12 de mesure du temps et de détermination de l'heure ou fraction d'heure prédéterminée définissant la fin de la période de stationnement autorisé , un organe d'affichage 13 pour indiquer l'heure d'arrivée ainsi que l'heure de départ, et un organe 14 émetteur d'un signal lié à ladite période de stationnement autorisé . Le dispositif 10 est alimenté en permanence par une source de tension 15 qui peut être constituée par la batterie du véhicule ou par une source indépendante.With reference to fig. 1, the illustrated appliance consists of two elements, which are, on the one hand, the electronic device 10 for detecting and displaying the end of an authorized parking period, intended to remain inside the vehicle and, on the other hand, the warning device 11 to inform this motorist of the imminent expiration of said period, intended to accompany the motorist when he leaves his parked vehicle. The electronic device 10 which will be described in more detail with reference to FIG. 2, essentially comprises a circuit 12 for measuring time and determining the hour or fraction of a predetermined hour defining the end of the authorized parking period, a display member 13 for indicating the time of arrival as well as the departure time, and a device 14 transmitting a signal linked to said authorized parking period. The device 10 is permanently supplied by a voltage source 15 which can be constituted by the vehicle battery or by an independent source.

L'organe émetteur 14 est de préférence constitué par un transducteur piézo-électrique conçu pour émettre un signal sous la forme de trains d'impulsions ultra-soniques. Le train d'impulsions ultra-soniques engendrées par le circuit 12 est constitué par un long paquet d'impulsions ultra-soniques marquant le début de la séquence, suivi d'un nombre de paquets de longueurs égales, mais de valeur plus faible que le premier. Le nombre de paquets d'impulsions qui constituent le code est par exemple égal au nombre de minutes séparant l'heure du jour de l'heure de départ affichée sur l'organe d'affichage 13 diminuée par exemple d'une valeur typique de cinq minutes, divisé par cinq et arrondi au nombre entier inférieur. A titre d'exemple, si l'heure du jour correspondant à l'heure d'arrivée sur l'aire de parcage est de 11 h 47, l'heure de départ, déterminée par le circuit 12, est de 14 h 30. Le nombre de minutes entre l'heure d'arrivée et l'heure de départ diminuée de cinq minutes est de 158 minutes. Le nombre de paquets d'impulsions est de trente et un, c'est-à-dire le résultat de la division de 158 par 5 arrondi au nombre entier inférieur.The emitting member 14 is preferably constituted by a piezoelectric transducer designed to emit a signal in the form of trains of ultrasonic pulses. The train of ultrasonic pulses generated by the circuit 12 consists of a long packet of ultrasonic pulses marking the start of the sequence, followed by a number of packets of equal length, but of lower value than the first. The number of pulse packets which constitute the code is for example equal to the number of minutes separating the time of day from the start time displayed on the display member 13, for example reduced by a typical value of five minutes, divided by five and rounded down to the nearest whole number. For example, if the time of day corresponding to the arrival time on the parking area is 11:47 a.m., the departure time, determined by circuit 12, is 2:30 p.m. The number of minutes between arrival time and departure time minus five minutes is 158 minutes. The number of pulse packets is thirty-one, that is, the result of dividing 158 by 5 rounded down.

Le dispositif avertisseur 11 comporte un organe récepteur 16 agencé pour capter le signal émis par l'organe émetteur 14. Cet organe est de préférence constitué par un transducteur conçu pour convertir les impulsions ultra-soniques captées en impulsions électriques émises à la sortie 17 de l'organe récepteur 16. Ces impulsions sont transmises à un filtre 18 dont la fréquence d'accord est égale à la fréquence des impulsions engendrées par le circuit 12, de manière à éliminer les impulsions parasites. Les impulsions filtrées par le filtre 18 sont transmises à l'entrée d'un amplificateur 19 dont le rôle consiste à amener leur niveau à une valeur suffisante pour permettre leur traitement ultérieur par un circuit logique. Un détecteur d'enveloppe 20 est connecté à la sortie de l'amplificateur 19 et permet de restituer, à partir de paquets d'impulsions correspondant aux trains d'impulsions ultra-soniques, un train d'impulsions de longueur définie. La sortie du détecteur d'enveloppe 20 est d'une part connectée à un circuit logique 21 et d'autre part à l'une des entrées d'une porte ET 22 . Le circuit logique 21, comportant notamment un discriminateur de durée d'impulsion, fournit un signal sur sa sortie 23 lorsqu'une impulsion de longueur au moins égale à celle de l'impulsion initiale nominale est reçue par l'organe récepteur 16. La sortie 23 du circuit logique est raccordée à l'autre entrée de la porte 22. Une autre sortie 24 est raccordée à un compteur 25 et permet de transmettre à ce compteur une impulsion de remise à zéro dont la présence est liée au signal transmis à la sortie 23 et qui sera utilisée pour remettre 1a compteur dans un état bien défini, lui permettant de recevoir un signal co'respondant à un nouveau train d'impulsions. Une troisième sortie 26 du circuit logique 21 est raccordée à une entrée d'une bascule bistable 27 pour permettre d'assurer le verrouillage d'un organe 28 émetteur d'un signal avertisseur pouvant par exemple être constitué par un signal d'alarme sonore, tactile ou lumineux.The warning device 11 comprises a receiving member 16 arranged to receive the signal emitted by the transmitting member 14. This member is preferably constituted by a transducer designed to convert the ultrasonic pulses picked up into electrical pulses emitted at the output 17 of the 'receiving member 16. These pulses are transmitted to a filter 18 whose tuning frequency is equal to the frequency of the pulses generated by the circuit 12, so as to eliminate the parasitic pulses. The pulses filtered by the filter 18 are transmitted to the input of an amplifier 19 whose role is to bring their level to a value sufficient to allow their subsequent processing by a logic circuit. An envelope detector 20 is connected to the output of the amplifier 19 and makes it possible to restore, from pulse packets corresponding to the ultrasonic pulse trains, a pulse train of defined length. The output of the envelope detector 20 is on the one hand connected to a logic circuit 21 and on the other hand to one of the inputs of an AND gate 22. The logic circuit 21, comprising in particular a pulse duration discriminator, supplies a signal on its output 23 when a pulse of length at least equal to that of the nominal initial pulse is received by the receiving member 16. The output 23 of the logic circuit is connected to the other input of the door 22. Another output 24 is connected to a counter 25 and makes it possible to transmit to this counter a reset pulse whose presence is linked to the signal transmitted to the output 23 and which will be used to reset counter 1a in a well defined state, enabling it to receive a signal co 'sponding to a new pulse train. A third output 26 of the logic circuit 21 is connected to an input of a flip-flop 27 to allow as secure the locking of a member 28 emitting a warning signal which may for example consist of an audible, tactile or light alarm signal.

La porte ET 22 ne transmet des signaux de chargement du compteur 25 que lorsque le circuit logique 21 émet un signal, dit signal de validité, à la sortie 23.The AND gate 22 transmits loading signals from the counter 25 only when the logic circuit 21 emits a signal, called the validity signal, at the output 23.

Un circuit diviseur 29, alimenté par une source de tension 30 et raccordé au circuit logique 21, au compteur 25 et à un second circuit logique 31 qui sera défini ci-dessous, fournit une base de temps pour la détermination des diverses durées nécessaires au circuit logique 21. Un élément diviseur 29 comporte par exemple un oscillateur à quartz suivi de plusieurs circuits diviseurs permettant de disposer de signaux de fréquences bien définis, respectivement utilisés par les divers composants auxquels il est raccordé. Une des fréquences disponibles à la sortie de l'élément diviseur 29 correspond par exemple à une impulsion toutes les cinq minutes, qui est directement liée à l'entrée 32 du compteur 25 pour provoquer le décomptage de la valeur chargée au moyen du train d'impulsions, ce qui aura pour effet, en l'absence de nouveaux chargements, d'amener l'état du compteur à zéro après un temps compté en minutes, égal au nombre chargé multiplié par cinq. A cet état zéro correspond l'apparition d'un signal émis à la sortie 33 du compteur 25, ce signal étant destiné à l'alarme engendrée par l'organe 28 émetteur d'un signal avertisseur. Le signal émis à la sortie 33 du compteur provoque un changement d'état de la bascule 27, dont la sortie est raccordée au circuit logique 31 servant à sélectionner une fréquence audible, une jm- pulsion lente et une durée limite de l'alarme au travers de ces liaisons avec l'élément diviseur 29. Le signal correspondant est envoyé sur un amplificateur 34 directement connecté à l'organe 28. Un interrupteur 35, constitué par exemple par un bouton-poussoir, permet d'interrompre à volonté le signal avertisseur sonore ou lumineux ou de mettre le dispositif d'alarme entièrement hors service.A divider circuit 29, supplied by a voltage source 30 and connected to the logic circuit 21, to the counter 25 and to a second logic circuit 31 which will be defined below, provides a time base for the determination of the various durations necessary for the circuit logic 21. A divider element 29 comprises for example a quartz oscillator followed by several divider circuits making it possible to have well-defined frequency signals, used respectively by the various components to which it is connected. One of the frequencies available at the output of the dividing element 29 corresponds for example to a pulse every five minutes, which is directly linked to the input 32 of the counter 25 to cause the counting of the value loaded by means of the train of pulses, which will have the effect, in the absence of new loads, of bringing the state of the counter to zero after a time counted in minutes, equal to the number loaded multiplied by five. This zero state corresponds to the appearance of a signal emitted at the output 33 of the counter 25, this signal being intended for the alarm generated by the member 28 emitting a warning signal. The signal emitted at the output 33 of the counter causes a change of state of the flip-flop 27, the output of which is connected to the logic circuit 31 serving to select an audible frequency, a slow pulse and a limit duration of the alarm at through these connections with the divider element 29. The corresponding signal is sent to an amplifier 34 directly connected to the member 28. A switch 35, constituted for example by a push button, makes it possible to interrupt the warning signal at will. sound or light or turn off the alarm entirely.

L'émetteur 14 et le récepteur 16 sont conçus de telle manière que la portée des informations transmises de l'un à l'autre soit relativement faible. En effet, il convient que l'opération de décomptage commence dès que la liaison entre l'émetteur 14 et le récepteur 16 est interrompue, c'est-à-dire lorsque l'automobiliste quitte son véhicule en stationnement.The transmitter 14 and the receiver 16 are designed such that the range of the information transmitted from one to the other is relatively small. Indeed, the countdown operation should start as soon as the link between the transmitter 14 and the receiver 16 is interrupted, that is to say when the motorist leaves his parked vehicle.

En référence à la fig. 2, le dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé se compose essentiellement d'un microprocesseur 40 ou d'un circuit équivalent associé à une horloge 41 servant de base de temps et fournissant notamment les signaux d'horloge nécessaires au fonctionnement du microprocesseur 40, et d'un dispositif d'affichage 42 agencé pour afficher simultanément l'heure d'arrivée ou éventuellement un intervalle de temps à l'intérieur duquel se situe l'heure d'arrivée et l'heure de départ correspondant à la fin du temps de stationnement autorisé.With reference to fig. 2, the electronic device for determining and displaying the end of an authorized parking period essentially consists of a microprocessor 40 or an equivalent circuit associated with a clock 41 serving as a time base and supplying in particular the clock signals necessary for the operation of the microprocessor 40, and of a display device 42 arranged to simultaneously display the arrival time or possibly a time interval within which the arrival time and the departure corresponding to the end of the authorized parking time.

Quatre interrupteurs 43 peuvent être mis en contact avec des entrées correspondantes du microprocesseur 40, pour permettre la modification des registres internes correspondant respectivement aux dizaines d'heures, aux heures, aux dizaines de minutes et aux minutes. Par ces interrupteurs, il est possible d'effectuer une remise à l'heure du dispositif, pour autant toutefois que le contacteur 44 se trouve dans une position "mise à l'heure", dans laquelle il ferme le circuit correspondant à l'entrée 45 du microprocesseur 40. Lorsque ce contacteur ferme le circuit correspondant à l'entrée 46 du microprocesseur, le mode de fonctionnement du dispositif peut être modifié en vue d'une utilisation basée sur des règles de stationnement différentes de celles de la zone bleue, en particulier celles correspondant à la zone dite rouge. Ce mode d'utilisation est avantageusement affiché au moyen d'un voyant lumineux 47 ou de tout autre organe approprié équipant le dispositif d'affichage 42. La commande de l'organe 47 s'effectue au moyen d'une liaison électrique avec le microprocesseur 40, matérialisée par la ligne 48.Four switches 43 can be brought into contact with corresponding inputs of the microprocessor 40, to allow modification of the internal registers corresponding respectively to tens of hours, hours, tens of minutes and minutes. By these switches, it is possible to reset the time of the device, provided however that the contactor 44 is in a "time setting" position, in which it closes the circuit corresponding to the input 45 of the microprocessor 40. When this contactor closes the circuit corresponding to the input 46 of the microprocessor, the operating mode of the device can be modified for use based on parking rules different from those of the blue zone, especially those corresponding to the so-called red zone. This mode of use is advantageously displayed by means of an indicator light 47 or any other suitable member fitted to the display device 42. The member 47 is controlled by means of an electrical connection with the microprocessor 40, indicated by line 48.

Dans la pratique, une intervention de l'utilisateur sur le contacteur 46, se présentant par exemple sous la forme d'un bouton-poussoir, ne sera nécessaire que pour le choix d'une zone autre que la zone bleue, par exemple la zone rouge, le système étant conçu de telle manière que toute nouvelle information, transmise par l'horloge 41 au microprocesseur 40, engendre automatiquement une commutation sur le mode de fonctionnement correspondant à la zone bleue, sachant que les zones de stationnement en zone bleue sont largement majoritaires.In practice, intervention by the user on the contactor 46, for example in the form of a push button, will only be necessary for choosing an area other than the blue area, for example the area red, the system being designed in such a way that any new information, transmitted by the clock 41 to the microprocessor 40, automatically generates a switching to the operating mode corresponding to the blue zone, knowing that the parking zones in the blue zone are largely majority.

Entre le microprocesseur 40 et l'écran d'affichage 49 de l'heure d'arrivée, est monté un décodeur pilote dont la fonction consiste à transformer une information codée décimale véhiculée par les quatre lignes 51 liant le microprocesseur 40 au décodeur 50 en une représentation en chiffres composés à l'aide de sept segments, dont les signaux de commande sont transmis par les sept lignes 52.Between the microprocessor 40 and the display screen 49 of the arrival time, a pilot decoder is mounted, the function of which is to transform a decimal coded information conveyed by the four lines 51 linking the microprocessor 40 to the decoder 50 in a representation in numbers composed using seven segments, the control signals of which are transmitted by the seven lines 52.

Le dispositif d'affichage 42 comporte en outre un écran 53 sur lequel est affichée l'heure de départ. Un démultiplexeur 54, monté entre le microprocesseur 40 et le dispositif d'affichage 42, permet de commander l'affichage que d'un seul chiffre à la fois, l'utilisation d'un mode d'affichage multiplexé permettant de limiter le nombre de liaisons électriques entre le microprocesseur 54 et le dispositif d'affichage 42.The display device 42 further comprises a screen 53 on which the departure time is displayed. A demultiplexer 54, mounted between the microprocessor 40 and the display device 42, makes it possible to control the display only with one digit at a time, the use of a multiplexed display mode making it possible to limit the number of electrical connections between the microprocessor 54 and the display device 42.

Bien que le dispositif d'affichage soit représenté sous la forme de deux écrans 49 et 53, il pourrait être constitué d'un seul écran, la sélection des chiffres destinés à visualiser l'heure d'arrivée ou l'heure de départ étant effectuée au moyen du démultiplexeur 54. De même, il est bien entendu que les procédés d'intégration connus en soi permettent de combiner les fonctions du décodeur pilote et du multiplexeur ou du décodeur pilote, du multiplexeur et du microprocesseur.Although the display device is represented in the form of two screens 49 and 53, it could consist of a single screen, the selection of the figures intended to display the arrival time or departure time being carried out by means of the demultiplexer 54. Likewise, it is understood that the integration methods known per se make it possible to combine the functions of the pilot decoder and of the multiplexer or of the pilot decoder, of the multiplexer and of the microprocessor.

Un stabilisateur 55, connecté au microprocesseur 40, est destiné à stabiliser la tension d'alimentation de la source 56 et à l'amener à un niveau suffisant pour permettre le fonctionnement correct des différents composants du système décrit ci-dessus.A stabilizer 55, connected to the microprocessor 40, is intended to stabilize the supply voltage of the source 56 and to bring it to a level sufficient to allow the correct operation of the various components of the system described above.

Le microprocesseur 40 comporte en outre une entrée 57, par laquelle lui est transmise une information extérieure signifiant que le véhicule est en déplacement ou à l'arrêt. Cette information extérieure sert à commander l'affichage de l'heure du jour sur l'écran d'affichage correspondant 49, ainsi que la commande de l'affichage de l'heure de départ déterminée en fonction de l'heure d'arrivée. Cette commande s'effectue à intervalles réguliers, aussi longtemps que le signal amené à l'entrée 57 indique que le véhicule est en circulation. Lorsque le véhicule est à l'arrêt, cet arrêt étant déterminé par un capteur quelconque, tel que par exemple un accéléromètre qui sera décrit ci-dessous en référence à la fig. 3, l'information extérieure n'est plus transmise, l'heure d'arrivée affichée sur l'écran 49 est l'heure du jour à laquelle a pris fin la circulation du véhicule, c'est-à-dire l'heure à laquelle débute le stationnement et l'heure de départ affichée sur l'écran 53 est l'heure calculée par le dispositif et définissant l'heure limite du stationnement autorisé. Pendant toute la période du stationnement, des registres internes, commandés par l'horloge 41, continuent à garder l'heure du jour, de manière à pouvoir l'afficher comme mentionné précédemment au moment de la remise en route du véhicule.The microprocessor 40 further comprises an input 57, by which an external information is transmitted to it signifying that the vehicle is in motion or at a standstill. This external information is used to control the display of the time of day on the corresponding display screen 49, as well as the control of the display of the departure time determined as a function of the arrival time. This command is carried out at regular intervals, as long as the signal brought to the input 57 indicates that the vehicle is in circulation. When the vehicle is stopped, this stop being determined by any sensor, such as for example an accelerometer which will be described below with reference to FIG. 3, the external information is no longer transmitted, the arrival time displayed on the screen 49 is the time of day when the circulation of the vehicle ended, that is to say the time to which parking begins and the starting time displayed on screen 53 is the time calculated by the device and defining the time limit for authorized parking. During the entire parking period, internal registers, controlled by the clock 41, continue to keep the time of day, so that it can be displayed as mentioned previously when the vehicle is restarted.

Le microprocesseur 40 est programmé de telle manière qu'il fonctionne exactement comme un disque de stationnement en zone bleue ou en zone rouge. La journée est divisée en un certain nombre d'intervalles de temps, dont chacun est lié à une heure déterminée qui est l'heure de fin de stationnement autorisé. Au cours d'une première phase, le microprocesseur détermine dans lequel de ces intervalles de temps tombe l'heure du jour à laquelle débute la période de stationnement, c'est-à-dire l'heure d'arrivée de l'automobile sur l'aire de stationnement. Au cours d'une seconde phase, le microprocesseur établit la correspondance entre cet intervalle de temps et l'heure de départ obligatoire de l'automobile et commande l'affichage de cette heure de départ.The microprocessor 40 is programmed in such a way that it functions exactly like a parking disk in the blue zone or in the red zone. The day is divided into a number of time intervals, each of which is linked to a specific time which is the end time for authorized parking. During a first phase, the microprocessor determines in which of these time intervals falls the time of day at which the parking period begins, that is to say the time of arrival of the automobile on the parking area. During a second phase, the microprocessor establishes the correspondence between this time interval and the mandatory start time of the automobile and controls the display of this start time.

Comme mentionné précédement, pour rendre le système totalement automatique, il est avantageux de coupler l'entrée 57 du microprocesseur 40, destinée à recevoir ladite information extérieure, à un capteur tel que par exemple un accéléromètre susceptible de déterminer à chaque instant si le véhicule est en marche ou à l'arrêt. En pratique, lorsqu'un véhicule circule, il subit des accélérations ou des décélérations à intervalles plus ou moins rapprochés. Alors qu'un choc unique provoque une accélération positive ou négative selon la direction du choc, une suite d'accélérations de signes contraires correspond à un véhicule en circulation normale où les accélérations suivies de décélérations dues à des freinages se succèdent de façon quasi ininterrompue. Un accéléromètre permet de détecter les diverses accélérations et d'en déduire si le véhicule est en circulation, à l'arrêt ou s'il a subi un choc alors qu'il se trouvait à l'arrêt. Un tel équipement est avantageusement utilisé pour fournir l'information extérieure transmise à l'entrée 57.As mentioned previously, to make the system fully automatic, it is advantageous to couple the input 57 of the microprocessor 40, intended to receive said external information, to a sensor such as for example an accelerometer capable of determining at any time whether the vehicle is on or off. In practice, when a vehicle is traveling, it undergoes accelerations or decelerations at more or less frequent intervals. While a single shock causes a positive or negative acceleration depending on the direction of the shock, a series of accelerations of opposite signs corresponds to a vehicle in normal circulation where the accelerations followed by decelerations due to braking succeed each other in an almost uninterrupted fashion. An accelerometer makes it possible to detect the various accelerations and to deduce therefrom whether the vehicle is in traffic, stationary or if it has been subjected to an impact while it was stationary. Such equipment is advantageously used to provide the external information transmitted to the input 57.

En référence à la fig. 3, cet équipement se compose d'un élément piézo-électrique 60 auquel est liée mécaniquement une masse 61. Cette masse est reliée à l'élément piézo-électrique 60 de telle manière que toute accélération positive ou négative engendre une force susceptible de déformer de façon élastique l'élément piézo-électrique. Cet élément est disposé de telle manière que sa sensibilité aux accélérations latérales subies par le véhicule est extrêmement faible, alors que la sensibilité aux accélérations parallèles à l'axe du véhicule est maximale. La déformation de l'élément piézo-électrique développe, d'une manière connue en soi, une différence de potentiel entre ses électrodes. Cette différence de potentiel est amplifiée par un amplificateur 62, puis filtrée par un filtre de type passe-bas 63, dont la fonction est d'éliminer les oscillations parasites et de ne conserver que celles qui correspondent à des accélérations normales telles que les subit le véhicule en circulation normale. Les composantes à fréquence élevée, provoquées par exemple par des vibrations du véhicule lorsque celui-ci est en stationnement et qu'un autre véhicule passe à proximité, sont éliminées par le filtre 63.With reference to fig. 3, this equipment consists of a piezoelectric element 60 to which a mass 61 is mechanically linked. This mass is connected to the piezoelectric element 60 in such a way that any accelerated positive or negative ration generates a force capable of elastic deformation of the piezoelectric element. This element is arranged in such a way that its sensitivity to lateral accelerations undergone by the vehicle is extremely low, while the sensitivity to accelerations parallel to the axis of the vehicle is maximum. The deformation of the piezoelectric element develops, in a manner known per se, a potential difference between its electrodes. This potential difference is amplified by an amplifier 62, then filtered by a low-pass type filter 63, the function of which is to eliminate parasitic oscillations and to keep only those which correspond to normal accelerations such as undergoes them. vehicle in normal traffic. The high frequency components, caused for example by vibrations of the vehicle when it is parked and another vehicle passes nearby, are eliminated by the filter 63.

Le signal issu du filtre 63 est ensuite amplifé par une chaîne d'amplificateurs comportant par exemple les deux amplificateurs 64 et 63. Ce signal amplifié est transmis à l'entrée d'un comparateur à fenêtre constitué par deux éléments comparateurs 66 et 67. Ce comparateur permet de définir le signe de l'altération subie par le véhicule. La sortie de l'élément comparateur 66 sera par exemple active lorsque le véhicule subit une accélération positive, alors que la sortie de l'élément comparateur 67 sera dans ce cas active lorsque le véhicule subit une décélération. Les sorties des deux éléments comparateurs sont respectivement connectées à deux éléments monostables 68 et 69. Lorsque le véhicule subit une accélération d'un certain signe, le monostable correspondant forme une impulsion d'une certaine durée T1 définie en fonction de la constante de temps de l'élément piézo-électrique 60. Cette impulsion a pour effet d'inhibiter l'élément monostable correspondant à l'accélération de signes contraires qui est induit par l'élasticité de l'élément piézo-électrique. Grâce au montage symétrique des deux éléments monostables 68 et 69, chaque apparition d'un premier signal correspondant à une accélération bloque, pendant une durée T1, le signal correspondant à une décélération.The signal from the filter 63 is then amplified by a chain of amplifiers comprising for example the two amplifiers 64 and 63. This amplified signal is transmitted to the input of a window comparator constituted by two comparator elements 66 and 67. This comparator makes it possible to define the sign of the alteration suffered by the vehicle. The output of the comparator element 66 will for example be active when the vehicle undergoes a positive acceleration, while the output of the comparator element 67 will in this case be active when the vehicle undergoes a deceleration. The outputs of the two comparator elements are respectively connected to two monostable elements 68 and 69. When the vehicle undergoes an acceleration of a certain sign, the corresponding monostable forms a pulse of a certain duration T 1 defined as a function of the time constant of the piezoelectric element 60. This pulse has the effect of inhibiting the monostable element corresponding to the acceleration of contrary signs which is induced by the elasticity of the piezoelectric element. Thanks to the symmetrical mounting of the two monostable elements 68 and 69, each appearance of a first signal corresponding to an acceleration blocks, for a duration T 1 , the signal corresponding to a deceleration.

Les sorties des éléments monostables 68 et 69 sont connectées aux entrées de deux autres éléments monostables 70 et 71. La fonction de ces deux éléments monostables supplémentaires 70 et 71 consiste à définir la durée d'un intervalle de temps T2 plus grand que Tl, pendant lequel le dispositif collecte des informations relatives aux mouvements du véhicule. Si, pendant l'intervalle de temps T2, le dispositif détecte au moins deux accélérations de signes contraires, il fournira, à l'entrée 57 du microprocesseur (voir fig. 2), une information extérieure signifiant que le véhicule est en circulation normale. Cette information est transmise au moyen de deux portes logiques ET 72 et 73. Lorsque la sortie d'un des éléments monostables 70 ou 71 est activée indirectement par une accélération d'un certain signe, elle transmet un signal de validité sur une des entrées des portes logiques 72 ou 73 correspondantes. Si un signal correspondant à une accélération de signe contraire apparaît pendant l'intervalle de temps T2 sur l'autre entrée de la porte logique ET, un signal pourra être émis à la sortie de cette porte. Les deux sorties des portes logiques 72 et 73 sont connectées aux entrées d'une porte logique OU 74. La sortie de la porte logique 74 fournit par conséquent un signal chaque fois qu'au moins deux accélérations de signes contraires sont apparues pendant l'intervalle de temps T2, signalant ainsi au dispositif électronique décrit précédemment que le véhicule circule normalement. L'absence d'accélération et de signal correspondant signifie pour le système que le véhicule est en stationnement. Par contre, l'apparition d'un ou plusieurs signaux correspondant à des accélérations de mêmes signes pendant une durée de temps quelconque, n'est pas interprétée par le dispositif comme correspondant au véhicule en circulation. Ceci est bien le but recherché par ce dispositif qui permet de fournir une indication signalant que le véhicule est en marche ou en stationnement.The outputs of the monostable elements 68 and 69 are connected to the inputs of two other monostable elements 70 and 71. The function of these two additional monostable elements 70 and 71 consists in defining the duration of a time interval T 2 greater than T l , during which the device collects information relating to the movements of the vehicle. If, during the time interval T 2 , the device detects at least two accelerations of opposite signs, it will provide, at input 57 of the microprocessor (see fig. 2), external information signifying that the vehicle is in normal circulation . This information is transmitted by means of two AND logic gates 72 and 73. When the output of one of the monostable elements 70 or 71 is activated indirectly by an acceleration of a certain sign, it transmits a validity signal on one of the inputs of the corresponding logic gates 72 or 73. If a signal corresponding to an acceleration of opposite sign appears during the time interval T2 on the other input of the AND logic gate, a signal may be emitted at the output of this gate. The two outputs of logic gates 72 and 73 are connected to the inputs of an OR logic gate 74. The output of logic gate 74 therefore provides a signal whenever at least two accelerations of opposite signs have appeared during the interval time T 2 , thus signaling to the electronic device described above that the vehicle is traveling normally. The absence of acceleration and corresponding signal means that the vehicle is parked. On the other hand, the appearance of one or more signals corresponding to accelerations of the same signs for any length of time, is not interpreted by the device as corresponding to the vehicle in circulation. This is indeed the aim sought by this device which makes it possible to provide an indication signaling that the vehicle is running or parked.

11 est bien évident que la transmission du signal d'information extérieure au dispositif illustré par la fig. 2 peut être effectuée par une connexion électrique directe, par exemple le contacteur actionné par la clé de contact. Dans la version préférée, l'accéléromètre de la fig. 3 est intégré au circuit de la fig. 2. Par ailleurs, on notera que le schéma du dispositif ci-dessus pourrait être modifié et que certains composants ou groupes de composants pourraient être remplacés par un ou plusieurs composants équivalents, notamment dans le cas de l'application des techniques d'intégration.It is obvious that the transmission of the external information signal to the device illustrated in FIG. 2 can be carried out by a direct electrical connection, for example the contactor actuated by the ignition key. In the preferred version, the accelerometer of FIG. 3 is integrated into the circuit of FIG. 2. Furthermore, it will be noted that the diagram of the above device could be modified and that certain components or groups of components could be replaced by one or more equivalent components, in particular in the case of the application of integration techniques.

La présente invention n'est pas limitée aux formes de réalisations décrites, mais peut subir différentes modifications et se présenter sous diverses variantes évidentes pour l'homme de l'art.The present invention is not limited to the embodiments described, but can undergo different modifications and come in various variants obvious to those skilled in the art.

Claims (8)

1. Appareil individuel de contrôle de la durée de stationnement, comportant un dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé en fonction de l'heure d'arrivée d'un automobiliste, et un dispositif avertisseur pour informer cet automobiliste de l'expiration imminente de ladite période, caractérisé en ce que ledit dispositif électronique est pourvu d'un organe émetteur d'un signal lié à ladite période de stationnement autorisé, et en ce que ledit dispositif avertisseur est équipé d'un organe récepteur du signal émis par l'émetteur, d'une unité de traitement de l'information contenue dans ce signal et d'un organe émetteur d'un signal avertisseur commandé par ladite unité de traitement, agencé pour émettre ledit signal avertisseur avant l'expiration de la période de stationnement autorisé.1. Individual parking time control device, comprising an electronic device for determining and displaying the end of an authorized parking period as a function of the arrival time of a motorist, and a warning device for informing this motorist of the imminent expiration of said period, characterized in that said electronic device is provided with a device emitting a signal linked to said authorized parking period, and in that said warning device is equipped with a receiving device of the signal transmitted by the transmitter, of a unit for processing the information contained in this signal and of a body transmitting a warning signal controlled by said processing unit, arranged to transmit said warning signal before expiration of the authorized parking period. 2. Appareil selon la revendication 1, caractérisé en ce que le dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé comporte une horloge alimentée de façon permanente par une source de courant permettant de disposer à tout moment de l'heure du jour, un circuit électronique connecté à l'horloge et comportant des registres dans lesquels est mémorisée au moins une table de correspondance pour faire correspondre à l'heure du jour ou à une plage d'heures du jour une heure ou fraction d'heure prédéterminée, et des moyens pour afficher ladite heure ou fraction d'heure prédéterminée correspondant à ladite heure du jour ou plage d'heures du jour.2. Apparatus according to claim 1, characterized in that the electronic device for determining and displaying the end of an authorized parking period comprises a clock permanently powered by a current source making it possible to have the time at any time of the day, an electronic circuit connected to the clock and comprising registers in which at least one correspondence table is stored to correspond to the hour of the day or to a range of hours of the day an hour or fraction of an hour predetermined time, and means for displaying said predetermined time or fraction of an hour corresponding to said time of day or time range of day. 3. Appareil selon la revendication 2, caractérisé en ce que le dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé comporte des moyens de détection de l'immobilisation du véhicule, agencés pour enclencher l'opération consistant à faire correspondre à l'heure du jour ou plage d'heures du jour, ladite heure ou fraction d'heure prédéterminée.3. Apparatus according to claim 2, characterized in that the electronic device for determining and displaying the end of an authorized parking period comprises means for detecting the immobilization of the vehicle, arranged to initiate the operation consisting in matching at the time of day or range of hours of the day, said predetermined hour or fraction of an hour. 4. Appareil selon la revendication 3, caractérisé en ce que lesdits moyens de détection de l'immobilisation du véhicule comportent un accéléromètre.4. Apparatus according to claim 3, characterized in that said means for detecting the immobilization of the vehicle comprise an accelerometer. 5. Appareil selon la revendication 3, caractérisé en ce que lesdits moyens de détection de l'immobilisation du véhicule sont associés aux contacteurs de mise en marche de ce véhicule.5. Apparatus according to claim 3, characterized in that said means vehicle immobilizer detection sensors are associated with the ignition switches for this vehicle. 6. Appareil selon la revendication 1, caractérisé en ce que l'organe émetteur du dispositif électronique pour déterminer et afficher la fin d'une période de stationnement autorisé comporte au moins une source d'impulsions ultra-soniques.6. Apparatus according to claim 1, characterized in that the transmitter of the electronic device for determining and displaying the end of an authorized parking period comprises at least one source of ultrasonic pulses. 7. Appareil selon la revendication 4, caractérisé en ce que l'accéléromètre comporte un élément piézo-électrique associé à une masse, cet ensemble étant agencé de telle manière que sa sensibilité aux accélérations selon l'axe du véhicule soit maximale et que sa sensibilité aux accélérations transversales soit minimale.7. Apparatus according to claim 4, characterized in that the accelerometer comprises a piezoelectric element associated with a mass, this assembly being arranged in such a way that its sensitivity to acceleration along the axis of the vehicle is maximum and that its sensitivity at transverse accelerations is minimal. 8. Appareil selon la revendication 2, caractérisé en ce que le circuit électronique comporte un microprocesseur et est associé à au moins un organe de commande extérieur conçu pour commuter le mode de fonctionnement de façon à l'adapter aux règles de stationnement spécifiques à différentes zones de stationnement.8. Apparatus according to claim 2, characterized in that the electronic circuit comprises a microprocessor and is associated with at least one external control member designed to switch the operating mode so as to adapt it to the parking rules specific to different zones parking.
EP83810622A 1983-12-27 1983-12-27 Personal device for parking time control Expired EP0146664B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP83810622A EP0146664B1 (en) 1983-12-27 1983-12-27 Personal device for parking time control
DE8383810622T DE3373375D1 (en) 1983-12-27 1983-12-27 Personal device for parking time control
AT83810622T ATE29322T1 (en) 1983-12-27 1983-12-27 INDIVIDUAL DEVICE FOR PARKING TIME CONTROL.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83810622A EP0146664B1 (en) 1983-12-27 1983-12-27 Personal device for parking time control

Publications (2)

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EP0146664A1 true EP0146664A1 (en) 1985-07-03
EP0146664B1 EP0146664B1 (en) 1987-09-02

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AT (1) ATE29322T1 (en)
DE (1) DE3373375D1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185137A (en) * 1985-12-28 1987-07-08 Kazuo Sato A parking meter
EP0297531A1 (en) * 1987-07-03 1989-01-04 Nardino Righi Electronic parking time indicator for autovehicles
EP1221676A2 (en) * 2000-10-11 2002-07-10 Ermanno Bini Chiesa Automatic parking disk
EP1229501A1 (en) * 2001-01-31 2002-08-07 Parking Partners Ltd. Parking system with automatic announcements to a vehicle driver
EP1231572A2 (en) * 2001-02-10 2002-08-14 Peter Gautsch Parking disc for motor vehicles
WO2003048873A1 (en) * 2001-12-05 2003-06-12 Florix Technology Limited Supply current usage control system
EP1638053A1 (en) * 2004-09-20 2006-03-22 Matsushita Electric Industrial Co., Ltd. Automatic parking permission time information system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US987773A (en) * 1910-08-02 1911-03-28 William F Templeton Churn.
US3049864A (en) * 1960-02-05 1962-08-21 Michel Conchon Parking meter
DE2822002A1 (en) * 1977-05-20 1979-04-05 Sharp Kk ELECTRONIC TIMER
DE2811456A1 (en) * 1978-03-14 1979-09-20 Schlegel Parking time unit for motor vehicle - comprises clock, memory unit, display unit and two timing switches
DE2851596A1 (en) * 1978-11-29 1980-06-12 Dettwiler Hans Digital parking meter for use inside car - has processor-controlled display to give both start and finish time of parking period
FR2478842A1 (en) * 1980-03-24 1981-09-25 Ebauches Sa PARKING TIME SIGNALING DEVICE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US987773A (en) * 1910-08-02 1911-03-28 William F Templeton Churn.
US3049864A (en) * 1960-02-05 1962-08-21 Michel Conchon Parking meter
DE2822002A1 (en) * 1977-05-20 1979-04-05 Sharp Kk ELECTRONIC TIMER
DE2811456A1 (en) * 1978-03-14 1979-09-20 Schlegel Parking time unit for motor vehicle - comprises clock, memory unit, display unit and two timing switches
DE2851596A1 (en) * 1978-11-29 1980-06-12 Dettwiler Hans Digital parking meter for use inside car - has processor-controlled display to give both start and finish time of parking period
FR2478842A1 (en) * 1980-03-24 1981-09-25 Ebauches Sa PARKING TIME SIGNALING DEVICE

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185137A (en) * 1985-12-28 1987-07-08 Kazuo Sato A parking meter
EP0297531A1 (en) * 1987-07-03 1989-01-04 Nardino Righi Electronic parking time indicator for autovehicles
EP1221676A2 (en) * 2000-10-11 2002-07-10 Ermanno Bini Chiesa Automatic parking disk
EP1221676A3 (en) * 2000-10-11 2003-10-08 Ermanno Bini Chiesa Automatic parking disk
EP1229501A1 (en) * 2001-01-31 2002-08-07 Parking Partners Ltd. Parking system with automatic announcements to a vehicle driver
EP1231572A2 (en) * 2001-02-10 2002-08-14 Peter Gautsch Parking disc for motor vehicles
EP1231572A3 (en) * 2001-02-10 2003-07-09 Peter Gautsch Parking disc for motor vehicles
WO2003048873A1 (en) * 2001-12-05 2003-06-12 Florix Technology Limited Supply current usage control system
EP1638053A1 (en) * 2004-09-20 2006-03-22 Matsushita Electric Industrial Co., Ltd. Automatic parking permission time information system

Also Published As

Publication number Publication date
DE3373375D1 (en) 1987-10-08
EP0146664B1 (en) 1987-09-02
ATE29322T1 (en) 1987-09-15

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