FR2657594A1 - AUTOMATIC DETECTOR EQUIPMENT FOR CALLING ELEVATORS. - Google Patents

Abstract

Automatic detector equipment for calling elevators, characterized in that it comprises a light sensor unit (1), producing a light beam which can be intercepted by the user, this beam being based on the modulated emission of infrared rays or on a photoconductive element, activated when the internal semiconductor is illuminated by photons of energy producing a potential difference when a person enters its field of action, this potential being applied to a delay or delay unit, in order to establish a delay in time between the instant when the sensor is activated and the instant when the potential arrives at the trigger block (2), which receives the pulses detected and supplied by the electronic otpic capture, which are formed so that they can be given the desired voltage / current characteristic to excite the elevator motor.

Description

"Automatic detector equipment for calling elevators" The invention

  relates to a detector equipment, intended to produce the call of an elevator, by means of an electronic device This equipment detects the presence of the user of the elevator and this presence will cut a light beam, so that the device in question will be activated immediately afterwards, so that the elevator starts running. It will automatically go to the place where this presence has been detected,

  in turn producing an acoustic signal.

  The assembly which consists of this detector equipment applies the basic principle of the electronic optical sensor, which consists of a functional unit, which makes it possible to detect the presence of a body, by interrupting a light beam. -this can be emitted by the unit itself, in which case the interruption of the beam will cause the activation of the unit Or, otherwise, it will be allowed or not that the light falls on a photosensitive element N ' no matter which

  of these two possibilities will produce the same effects.

  All this system will bring to all the users of the elevator an additional convenience, as well as a great support at the precise moments when their hands would fail them to push the button of the elevator in order to request its services. It will also lend a important service to the handicapped sector of the population, formed by the physically disabled and the blind To the first, because their mere presence will start the elevator, without them having to perform any maneuver, which could jeopardize their safety To the latter, because at the moment when the light beam is cut and the elevator is activated, an acoustic signal will sound which will indicate to them that the elevator has been called, while specifying the exact place where they

will have access to it.

  The invention also applies to lifts

  industrial charges, hotels, hospitals or the like. The current technique that is used for the commissioning and calling of elevators envisages, in all known cases, series of buttons which have to be pressed, both in elevators

  ordinary than in those with memory.

  However, up to the present time, there are still no means by which they can be called automatically, with the mere presence of their user on any floor of the building, such as

sensors or photocells.

  In summary, the automatic detector equipment for calling the elevators comprises a block circuit, the diagrammatic representation of which

  will specify the function that each block will have to fulfill.

  The circuits will be different according to the characteristics of the elevator, because everything will depend on the question of whether it is an elevator with memory or not This reservation being made, the operation will start when the user cuts the light beam At this time there, the photosensitive cell will be activated, producing at its output a pulse whose potential difference will be applied to the input of the trigger circuit. This one, according to this impulse which it receives at its entry, will be activated and will produce at its exit an impulse whose potential difference will be

  applied to the input of the trip circuit.

  This one, according to this impulse which it receives at its entry, will be activated and will produce at its exit an impulse whose duration will depend on the time during which the beam of light will be interrupted Once this one ceases to be interrupted, the sensor will no longer present a potential difference at its output, so that the trigger circuit will no longer receive this potential at its input Therefore, there will also be a zero potential at its output, so that the motor of the elevator will stop

to be excited.

  According to a characteristic of the invention, the automatic detector equipment for calling the elevators is characterized in that it comprises a light sensor block, producing a light beam which can be intercepted by the user, this beam being based on the modulated emission of infrared rays or on a photoconductive element, activated when the interior semiconductor is lit by photons of energy which is not lower than the semiconductor threshold, producing a potential difference when a person enters in its field of action, this potential being applied to a delay or delay unit, in order to establish a delay in time between the instant when the sensor is activated and the instant when the potential arrives at the trigger block , which receives the pulses detected and supplied by the electronic otpic sensing, which are formed so that they can be given the voltage / current characteristic vou read to energize the elevator motor. According to another characteristic of the invention, this trigger circuit is formed by rectangular voltage pulse generators or state conformers, acting by means of monostable multivibrators, of a "Schmitt" trigger or of a wide range circuits, composed of operational amplifiers or digital flip-flops having responses equivalent to all of them, in order to convert the optical pulse into a square wave of voltage, the duration of which depends on the excitation time, this pulse being applied to the control block or circuit which exercises a direct action

on the elevator motor.

  According to another characteristic of the invention, the power output of the alternating current circuit is obtained directly from the network, by applying the pulse to a power element such as a thyristor, a triac, a

  power transistor or "Darlington" circuit.

  According to another characteristic of the invention, the elevator comprises a memory and a microprocessor. In order to better understand the general characteristics of this invention which have been set out above, we attach to this

  description of the drawings in which:

  Figure 1 shows a block diagram of the circuit applied to the detector equipment, consisting of the light sensor, the trigger circuit, the control circuit and the output potential applicable to the elevator motor or the microprocessor; Figure 2 shows a diagram of the power source block, with a current input from the network, 220 volts and 50 Hertz and a stabilized direct current output, which can be adjusted and short-circuited, whose mission will be to provide the desired polarization to all the blocks of the system, so that they can establish their

job.

  Figure 1 shows the light sensor block 1, since the optical sensors are devices that have been designed to obtain high detection qualities The principle of its operation is based on electronic optical concepts The device is capable of producing a light beam, which can be based on the modulated emission of infrared rays, which ensures its immunity to external light sources, or on a photoconductive element, which will be activated when the internal semiconductor is illuminated by energy photons which are not lower than the semiconductor threshold There will, in any case, be a potential difference at the moment a person enters his field of action This potential will be applied to a delay or delay, whose mission will be to establish a delay in time between the instant when the sensor is activated and the instant when the potential arr ive to the next block 2, which corresponds to the tripping circuit The time delay means will act to ensure the veracity of the call, by giving a consistency to it, so as to avoid any accidental interruption of the light beam cannot start the elevator motor The detection will be done by reflection, the object returning the received light, or by direct incidence, the distance of the detection can vary according to the conditions of the point of l 'location. The pulses detected and supplied by the electronic optical pickup must be formed so that they can be given the desired voltage / current characteristic in order to excite the elevator motor. This is how the output pulse presents in the light sensor 1, is applied to the trigger circuit 2, which is formed by rectangular voltage pulse generators or state conformers In the range of circuits which are able to fulfill this function, there are, inter alia, monostable multivibrators (circuits which present a stable state only by changing this one according to a pulse present at their entry, the time of permanence in their new state being transient, all this depending on the process of unloading of a capacitor; in other words, at their output there is a voltage of O volts, which corresponds to the state of saturation of the output circuit, but, by introducing a pulse at its input, this output circuit will have a voltage of a determined value), the triggering of "Schmitt" (circuit whose functioning resembles that of the monostable multivibrator, but with this difference that the triggering of "Schmitt" maintains the voltage at a determined value, as long as the excitation lasts at its input), as well as a wide range of possible circuits, composed

  operational amplifiers, digital scales

  ques, whose answer is equivalent; in this way, the optical pulse is converted into a square wave of voltage, the duration of which depends on that of the excitation This pulse is applied to block 3,

  constituted by the control circuit.

  The control circuit 3 depends on whether or not the elevator motor is directly triggered. If the excitation was direct, the output of the system could be obtained directly from the network.

  alternating current power Using the app

  cation of the pulse to a power element, such as a thyristor, a triac or even a power transistor, we activate the relay control member, to close the contact which will activate the motor of the elevator We could also use a "Darlington" configuration, in order to increase the controllable power In any case, this block 3 has the mission of supplying the excitation current which it needs to start up It will always do so according to the tripping circuit (i.e. provided that it has a high voltage level at its output), which in turn

  will depend on the light beam being cut 1.

  In the case where one acts directly on an elevator provided with memory, everything will depend on the characteristics of the microprocessor, i.e. the voltage / current values which it needs to be activated In this case, one could even remove block 3 from the control circuit, because ultimately it is from this microprocessor that the potential would come out

  4 applicable to the elevator motor circuit.

  Figure 2 shows the system or circuit provided with a power source 5, with a socket 6 coming from the network, of 220 volts and 50 Hertz preferably, with a current output by 7

  continuous stabilized, adjustable and short-

  circuite, whose mission will be to provide the desired polarization to all the blocks of system 1, 2 and 3, so that they can thus establish their

static work patterns.

Claims (1)

CLAIMS) Automatic detector equipment for calling elevators, characterized in that it comprises a light sensor block (1), producing a light beam which can be intercepted by the user, this beam being based on the modulated emission of rays infrared or on a photoconductive element, activated when the interior semiconductor is lit by photons of energy which is not lower than the threshold of the semiconductor, producing a potential difference when a person enters his field of action, this potential being applied to a delay or timing unit, in order to establish a delay in time between the instant when the sensor is activated and the instant when the potential arrives at the trigger block (2), which receives the pulses detected and supplied by the electronic otpic capture, which are formed so that they can be given the desired voltage / current characteristic to excite the mo lift elevator. ) Equipment according to claim 1, characterized in that this trigger circuit is formed by rectangular voltage pulse generators or state conformers, acting by means of monostable multivibrators, of a "Schmitt" trigger or of a wide range of circuits, composed of operational amplifiers or digital flip-flops having responses equivalent to all of these, in order to convert the optical pulse into a square wave of voltage, the duration of which depends on the excitation time, this pulse being applied to the control block or circuit (3) which exerts a direct action on the elevator motor.   30) Equipment according to claim 1, characterized in that the power output of the alternating current circuit is obtained directly from the network, by applying the pulse to a power element such as a thyristor, a triac, a power transistor or a "Darlington" circuit. ) Equipment according to claim 1, characterized in that the elevator comprises a memory and a microprocessor.