FR2657708A1 - DEVICE FOR GUIDING A MOBILE. - Google Patents

Abstract

The invention relates to a device for guiding a mobile. According to the invention, it comprises a transmitter (1) and a receiver (8) of infrared radiation, a control unit (7) connected to the receiver (8) and to the executive bodies of the mobile (12); the receiver (8) is placed on the tail of the mobile (12) so that its directional diagram is oriented towards the zone (B) not presenting any danger for the operator (14). The invention can be used for the wireless remote control of industrial mobiles.

Description

The present invention relates to the mining industry, and more

  particularly the guiding devices of a mobile. The invention can be useful for wireless remote control of industrial mobiles. There is a device for guiding a mobile by cable line (see Novosti zarubezhnoi ugolnoi

  promyshlennosti, NG 4, 1972, (Moscow), "Telegraph system

  for loaders ") having a control block placed on the mobile and a control panel to be installed

  in any convenient place The remote control is done by

  The distance between the control panel and the mobile, which is variable, is limited to the direct view of the

mobile workplace.

  The existing device does not exclude the possibility of a movement of the operator in the danger zone,

  that is, in the operating area of the labor

  of the mobile, without the functions of the guiding

  are blocked, which puts the operator in danger

  to be traumatized by the working organ of the mobile.

  There is a device for guiding a mobile

  (cf "Gluckauf", Revue des Mines, 8 (2), 1967, "Installa-

  portable radio remote control of mining machines "by K Weber et al pages 16-21) comprising a portable radio transmitter by the operator, a radio receiver and a control block placed on the mobile The device

  existing system provides guidance for the mobile at a distance

  before reaching 15 m, beyond which the mobile stops.

  The mobile remains guided during the stay of the operator in the operating zone of the working member, which can lead to the trauma of the operator The device

  existing system has at its disadvantage the reduced reliability of radio-

  channel due to poor noise protection.

  There is also a device for guiding a mobile (see Encyclopedia of Modern Technique, Automation of Production and Industrial Electronics, 1962, Volume 1, Volume 3 (Moscow), pages 496 to 497 (V 1), page 136 (V 3)

  comprising a transmitter and receiver of infra-

  red as a control block, placed on the mobile and connected to the receiver and executive organs of the mobile. The existing device does not exclude the possibility of guiding the mobile of a danger zone for the operator

  which guides the mobile, which can lead to its trauma.

  The present invention aims to create a mobile guiding device to exclude the possibility of guiding the mobile from the operating area of its working member so as to avoid the risk of trauma to the operator and to increase security

work.

  The aim is achieved by the fact that, in a guiding device of a mobile comprising a transmitter and an infrared radiation receiver as well as a

  command block, placed on the mobile and connected to the receiver.

  and the executive organs of the mobile, according to the invention, the infrared-radiation receiver is located on the tail of the mobile and its directional diagram is oriented towards

  the area, without danger to the operator, so as to avoid

only this area.

  The invention eliminates the risk of trauma to the operator in the operating zone of the work organ

  and, by the same token, contributes to the safety of his

  vail. In what follows, the invention will be explained on

  an example of one of its particular embodiments

  with reference to the accompanying drawings, in which: FIG. 1 represents the block diagram of a device for guiding a mobile, according to the invention; FIG. 2 shows the installation diagram of the elements of the device on the mobile and in the working area of the operator, according to the invention; Figure 3 shows the block diagram of the guide device of a mobile according to the invention; and Figure 4 shows the electrical diagram of a

  emitter of infrared radiation, according to the invention.

  The device for guiding a mobile has a

  portable transmitter 1 of guiding orders (FIG.

  a power source 2 connected in series with an encoder 3, a generator 4 and a gate 5 connected to the cathode of a light-emitting diode 6 whose anode is connected to the power source 2; the device also contains a control block 7 to which is connected an infrared radiation receiver 8 composed of a photodiode 9 and a selective amplifier 10 with, in series, a decoder 11 The anode of the photodiode 9 is

  connected to the selective amplifier 10, its cathode being connected

  The control block 7 is connected to a mobile 12 The arrows A indicate the direction of the infrared radiation The transmitter 1 (Figure 2) is next to the operator 14 and the control block 7 , the receiver 8 with the photodiode 9, are mounted on the mobile 12 The infrared radiation receiver 8 is located on the tail of the mobile 12 The directional diagram of the receiver 8 is oriented to the zone B, safe for the operator, to to cover only this area B.

  The decoder 11 comprises a pulse distributor

  15 (FIG. 3), coincidence circuits 161, 162 16 N whose first inputs have a common point connected to the output of the selective amplifier 10, their second inputs being connected to the outputs of the pulse distributor 15, one of which first input, joined at one point to the input of a pulse generator 17, is connected through a clock pulse selector to the output of the selective amplifier 10 The clock pulse selector contains a resistor 18, one of whose terminals is connected to the anode of a diode 19 and to one of the terminals of a capacitor 20 whose other terminal is connected to the ground bus 13 The cathode of the diode 19 is connected to the other

  terminal of the resistor 18 and at the output of the ampli-

  The second input of the pulse distributor

  15 is connected to the output of the pulse generator 17. The control block 7 comprises transistors 211, 212 21 N, the bases of which are connected, through resistors 22 i, 222 22, to the outputs of the circuits of FIG.

  coincidence 161, 162 16 n, whose transmitters are

  connected to the ground bus 13 and whose collectors are connected to operative relays 231, 232 23 whose contacts 24 and 242 24 N are connected to control circuits

251, 252 25 N of the mobile.

  Pulse generator 4 contains a divider

  frequency 26 (FIG. 4), the first input of which is

  linked to the output of the decoder 3, whose first output is connected to the input-of the gate T and whose second input is joined to one of the terminals of a quartz resonator 27 whose other terminal is connected at a first terminal of a resistor 28 and a capacitor 29 The second terminal of the capacitor 29 is connected to the ground bus 13, the second terminal of the resistor 28, connected to the second output of the frequency divider 26, being connected, through a resistor 30, at the second input of the frequency divider

26.

  The gate 5 comprises a transistor 31 which has its emitter connected to the ground bus 13, are collector connected to the cathode of the light-emitting diode 6, and its base connected, through a resistor 32, to the first output

of the frequency divider 26.

  The anode of the light-emitting diode 6 and the first input of the encoder 3 are connected to one of the terminals of the power supply 2 whose other terminal is connected to the ground bus 13 to which the second input of the

encoder 3.

  The guiding device of a mobile works

  as follows The power supply of the transmitter

  1 (FIG. 1) is on the supply source 2, for example on an accumulator. The encoder 3 performs the coding of the guidance commands. The pulses emitted by the encoder 3 attack the high frequency generator 4, that is, that is to say that amplitude modulates the carrier at high

  frequency The output signal of generator 4

  duction the door 5 to the rhythm of the generator 4 The current

  through the light-emitting diode 6, transmitting

  frarouge, shows a directed infrared radiation.

  The directional pattern of radiation is related to the type of

  electroluminescent diode used.

  Infrared radiation is captured by the photo-

  diode 9 (Figure 2) of the receiver 8 The receiver 8, with its

  photodiode 9, is placed on the tail of the mobile 12, the window

  input of the photodiode 9 being the opposite of the

  mobile workstation 12 With this dispatch of the

  receiver 8, the zone B for receiving infra-red radiation

  red is located behind the mobile 12, the di-

  tif of the photodiode 9 being turned away from the side

  placement of the mobile work organ 12.

  Since the selective amplifier 10 (FIG.

  cepte a signal at the frequency of the generator 4, the receiver

  8 provides coded guidance orders sent by

the issuer 1.

  The decoder 11 ensures the reception of the initial orders

  tials and the control block 7 performs the management of

executives of the mobile 12.

  Infrared radiation is not perceived by the

  todiode 9 only if the operator 14 (Figure 2), with his

  1, is in the receiving area B of the photo-

  diode 9 and that the emitter 1 has its emissive source (the diode

  electroluminescent 6) facing the mobile 12 (Figure 2).

  The shape of the infrared radiation receiving zone B

  depends on the type of photodiode 9 used.

  In the case of a displacement of the operator 14 towards the working member of the mobile 12, he leaves the zone B

  infrared radiation, the bodies

  mobile 12 are cut off and the guidance stops.

  The device for guiding the mobile allows the

  remote control of the executive organs of mobile 12 at a dis-

up to 20 meters.

  In this way, the present invention prohibits the starting and guiding of the mobile in the case of the stay of the operator in the operating zone of the working member of said moible, which eliminates at 100 o the risk of trauma of the operator and thereby contribute to

the safety of his work.

Claims (1)

R E V E N D I C A T I O N   Device for guiding a mobile of the type comprising   both an infrared transmitter and receiver as well as a control unit, placed on the mobile and connected to the receiver and to the executive members of the mobile, characterized in that the infrared radiation receiver (8) is located on the tail of the mobile (12) and that its   directional diagram is oriented towards the zone (B) which does not pre-   no danger to an operator (14) so as not to cover that area (B).