SU1375500A1 - Apparatus for reading-out vehicle number - Google Patents

Abstract

The invention relates to vehicle movement and can be used to automatically recognize the numbers of transport units and determine the direction of their movement, for example, dump trucks passing the control point. The purpose of the invention is to increase the reliability of the read information. The information is read from the information carrier 1 at the control points. Receivers 2 and 3, from which through the elements 4 and 5 and the triggers 6 and 7, which control the switch 8, the signal goes to the counter 10 elements, the output of which is connected to the decoder 11, where the binary code is converted into a single positional one and goes to the third and fourth elements And 13 and 14, from the outputs of which the signal goes to the counting inputs of the first and fourth counters 16 and 19. The counting inputs of the second and third counters 17 and 18 are connected to the output of the first account ika 16, and outputs connected to the control unit 20 and output unit 21, whose output is connected to inputs of OR element 22, through which the installation of the device initial state. 1 il. from "5 (L

Description

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The invention relates to the field of controlling the movement of vehicles and can be used to automatically identify the numbers of transport units and determine the direction of their movement, for example, dump trucks passing a control point.

The purpose of the invention is to increase the reliability of the read information.

The drawing shows the block diagram of the device.

The device contains on the vehicle the information carrier 1 and receivers 2 and 3 installed at the control point, connected to the first inputs of the first 4 and second 5 elements And whose outputs are connected to the first 6 and second 7 triggers, switching unit 8, connected to the first input to the receiver 3, and the first output - to the delay element 9 and the counter 10 elements, the output connected to the decoder 11, the pulse generator 12, the output connected to the first inputs of the third 13 and fourth 14 elements And, the second inputs of which are connected through the inverter 15, the first counter 16, the overflow output connected to the counting inputs of the second counter 17 and the third 18, and the output of the fourth 19 counter connected to the input of the control unit 20 connected by the output to the first input of the output unit 21, the OR 22 element, output connected to the installation inputs in About Triggers 6 and 7.

The device works as follows.

Information is read from information carrier 1 at checkpoints, for example, by photo-enhancement. When the vehicle is moving through the control point, the code elements of the information carrier 1 modulate the luminous flux of the illuminators of the receivers 2 and 3, which is converted into electrical pulses. The pulse trailing period is proportional to the distance between the front edges of the code elements of the information carrier 1. The distance between receivers 2 and 3 is a multiple of the pitch of the information carrier 1.

receiver 3 and then the first receiver 2. The signal from the second receiver 3 through the element 4, opened at the second input by the signal from the inverse output of the second trigger 7, sets the first trigger 6 to state 1. The signal O from the inverse output of the first trigger 6 closes the second element 5, preventing the passage of the signal from the first receiver 2 to the second trigger 7 ,. The signal from the direct output of the first trigger 6 through the switching unit 8 permits the passage of the signals of the first receiver, opens element 13 and the counter input of the fourth counter 19 receives pulses from the generator 12 pulses. The signals of receiver 2, formed by the code elements of the information carrier 1, through the switching unit 8 arrive at the counter 10 elements, where they are summed up, and the decoder 11 converts the bottom code of the counter 10 into a single positional one. After the first code element is found to be a signal from the output of the decoder 11, corresponding to the code 01 of the counter 10, the third element And 13 is closed, and the summation of the pulses by the fourth counter 19 stops.

In the fourth counter 19, a code is formed which is proportional to the transit time of the information carrier 1 between the receivers 2 and 3, and is proportional to the pitch of the information carrier 1. Counter 16 is a binary-ten counter with a number of bits sufficient to sum the pulses at the lowest possible speed of the vehicle.

From the output of the fourth counter 19, the code enters the information inputs of the counter 16, which is a programmable frequency divider.

After the receiver 2 reads the first code element of the information carrier 1 by the signal of the decoder 11, the fourth element 14 is removed through the inverter 15, the pulses of the generator 12 are passed to the first counter 16, where they are summed up. The conversion factor of the first counter 16 depends on the code

When a vehicle moves its information inputs and, tava, through the control point in the direction indicated by the arrow, the code elements of the information carrier 1 first pass through the luminous flux of the second

The CIM is proportional to the pitch of the information carrier 1. The signal from the output of the decoder 11, the corresponding code 01 of the counter 10, enters the third

The CIM is proportional to the pitch of the information carrier 1. The signal from the output of the decoder 11, corresponding to the code 01 of the counter 10, enters the third

counter 18, allowing the summation of the overflow pulses of the first counter 16, the number of which corresponds to a digit in tens of the vehicle number.

After the receiver 2 reads the second code element of the information carrier 1, the decoder 11 prohibits the third counter 18 and permits the second Q to place the information of the second and the crossbar 17 summing overflow pulses of the first counter 16, the number of which corresponds to the digit in units of the number of transport averages 17 and 18 in the output block 21 determined by the state of triggers 6 and 7 (the direction of movement of the vehicle). This allows

properties. At the same time, us-15 em is carried out regardless of the direction

Setting the first counter to zero 16.

After the receiver 2 reads the third code element of the information carrier 1, the decoder 11 prohibits

movement to place information in the travel unit 21, starting with the older bit.

The control unit 20 performs the

the summation of pulses by the second counter-2o is the trustworthiness readable by the other 17. At the same time, the second and third counters 17 and 18 store the codes of the units and ten numbers of the vehicle. At the same time, the signal from the output of the decoder 11, corresponding to 25 code 11 of the counter 10 pulses, enters the control unit 20. In the absence of errors in the read information, the control unit 20 generates a signal to the output unit 21, allowing the vehicle number code from the second and third counters 17 and 18 to be recorded in it and the indication of the direction of its movement from triggers 6 and 7. The delay element 9 controls the time between adjacent receiver pulses

2. After termination of the carrier of information carrier 1, this time exceeds the maximum possible time measured during vehicle movement.

with minimum speed. In this case, the delay element 9 generates a signal that, through the OR element 22, installs the O and the flip-flops 6 and 7 of the counters 10, 16-19.DMS

When the vehicle moves in the direction opposite to that indicated, the code elements of the carrier 1 of information first modulate the luminous flux of the receiver 2 and then the premnik

3. The receiver 2 signal through the second element 5 sets the trigger 7 to state 1. The signal from the inverse output of the trigger 7 terminates the first element 4, preventing the signal of the receiver 3 from passing to the trigger 6. The signal from the direct output of the trigger 7 through the switching unit 8 passes to its output and allows the passage of signal35

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formations. When modulating the light flux of receivers 2 and 3 with foreign objects, the latter can move at a speed lower than the minimum speed of the vehicle. In this case, the fourth counter 19 overflows, and the signal from its overflow output enters the control unit 20 and passes to the OR 22 element, which returns the device to its original state.

Claims (1)

Invention Formula I A device for reading the vehicle number, containing an information carrier located on a vehicle with code elements and information receivers installed at a control point, connected to one input of one and another elements respectively And connected to one output of the installation inputs of one and another of the other triggers, inverse the outputs of which are connected to other inputs of the second and first elements, respectively, AND, the pulse generator, the switching unit, the first input connected to the first vym receiver information and the first output - to the first inputs of a pulse counters and via the delay element - a first OR gate WMOs rows and counter-chip connected to the output of the decoder input, the first and second outputs which are connected to timing inputs of the second and third catch receiver 3 out. The rest of the device works as described. After reading the third (CODE element of the information carrier 1), the code of tens will be recorded in the second counter 17, and in the third counter 1 8 - the code of the units of the vehicle number. Sequence Secondly, the counters 17 and 18 in the output block 21 are determined by the state of the flip-flops 6 and 7 (the direction of the vehicle). This allows the movement has information in the output block 21, starting with the highest bit. Control unit 20 implements a terminal. with five 0 0 formations. When modulating the luminous flux of receivers 2 and 3 with foreign objects, the latter can move at a speed lower than the minimum possible speed of the vehicle. In this case, the fourth counter 19 overflows, and the signal from its overflow output enters the control unit 20 and passes to the OR element 22, which returns the device to its initial state. Invention Formula I A device for reading the vehicle number, containing an information carrier on the vehicle with code elements and information receivers installed at the control point, connected to one input of one and another AND respectively, connected by outputs to the installation inputs of 1 respectively of one and the other trigger, inverse the outputs of which are connected to other inputs, respectively, of the second and first elements AND, a pulse generator, a switching unit connected by the first input to the first receiver with the first inputs of one of the pulse counters and through the delay element with the first inputs of the OR element and the counter of code elements connected by an output to the input of the decoder, the first and second outputs of which are connected to the synchronization inputs of the second and third 513 pulse counters and the third output is connected to the first input of the control unit code connected by the first output to the second input of the OR element, and the output block “connected by the first input to the second output of the code control unit, and the second and third inputs respectively to the outputs of the second and third pulse counters, In order to increase reliability, it is equipped with additional AND elements connected by the first inputs to the output of the pulse generator, and the outputs to the counting inputs of the first and fourth The first pulse counter, the overflow output of the latter is connected to the second input of the code control unit, and the information output to the information input of the first pulse counter, the output of which is connected to the counting inputs of the second and third pulse counters, whose outputs are connected to the third and fourth inputs of the control unit, respectively code, while the fourth output of the decoder is connected to; the second input of the first additional element And through the inverter to the second input of the second additional element AND, and the output of the element OR is connected to the inputs of the installation in O of the counter of code elements, the first, second, third and fourth pulse counters, the first and second triggers, direct outputs which are connected respectively to the fourth and fifth inputs of the output unit and the second and third inputs of the switching unit connected by the fourth input to the second sensor, and the second output to the third input of the element I.