RU2096833C1 - Device for traffic monitoring - Google Patents

Abstract

FIELD: centralized monitoring of vehicles which follow transport route. SUBSTANCE: device according to patent application 1538178 is extended by introduction of fault vehicle code request into request cycle of vehicle. This code is repeated in request loop after equal time intervals, for example each second. Vehicle equipment also has fault request unit, number comparator, multiplexer. Control office has algorithm of fault vehicle request and processing of emergency call. Output of emergency call unit is connected to input of keyboard, first input of multiplexer, and fourth input of number comparator, which first, second and third inputs are connected to corresponding outputs of start verification unit. First output of number comparator is connected to first input of control unit and input of emergency call. Second, third and fourth outputs of number comparator are connected to input of digital-to-analog converter, input of start signal generator and third input of multiplexer, respectively. Second input of multiplexer is connected to output of transport route code detector. Output of multiplexer is connected to first input of encoding unit. EFFECT: increased response speed due to introduced emergency call system. 2 cl, 11 dwg

Description

 The invention relates to the field of traffic control of vehicles and can be used, in particular, in centralized control systems of mobile units of routed vehicles.

 The closest technical solution to the proposed device is the device according to the patent of the Russian Federation 1538178 [1] containing route sensors, a switch on the vehicle, a start check unit, a vehicle number comparison unit, a start signal shaper, a two-channel transceiver, a control unit, a digital-to-analog converter, a sensor distance traveled, coding unit, route sensor code generator, tangent, handset, handset position sensor, deviation indicator d from the graph, the receiver and the keyboard, at the control point - the transceiver of the first channel, the serial input to parallel converter, the matching unit, the coding unit, the information processing unit and the second channel transceiver. This device allows you to determine and display on the route mnemonic the location of the PE, their deviation from the traffic graphs, display the magnitude of this deviation on the driver and dispatcher displays, allows the dispatcher-driver to communicate on the initiative of any of them, as well as inform and display the data of the executed traffic graphs.

 The disadvantage of this device is that when building the fleet of PE increases the waiting time for the provision of voice communication of the driver of the vehicle (TS) with the control point (PC) at the initiative of the driver. Such a limitation of efficiency is an undesirable factor in the event of extreme situations on the highways of the transport network.

 The alleged invention solves the problem of increasing the efficiency of the device. This is achieved by introducing into the TC request cycle the codogram of the emergency vehicle request. This codogram is repeated during the request cycle at regular intervals, for example, after one second. An emergency call unit, a number comparison unit and a multiplexer are introduced into the vehicle equipment, an emergency vehicle polling and emergency call processing algorithm is introduced at the control point, the emergency call unit output is connected to the keyboard input, to the first input of the multiplexer and the fourth input of the number comparison unit, first, second and the third inputs of which are connected to the outputs of the same block start check. The first output of the number comparison unit is connected to the first input of the control unit and to the input of the emergency call unit. The second, third and fourth outputs of the number comparison unit are connected respectively to the input of the DAC, to the input of the driver of the trigger signal and to the third input of the multiplexer, the second input of which is connected to the output of the driver of the code of the route sensor, and the output to the first input of the coding block.

 In FIG. 1 shows a block diagram of a device for controlling the movement of vehicles; in FIG. 2 functional diagram of the coding unit; in FIG. 3 request codogram; in FIG. 4 functional diagram of the start check block; in FIG. 5 is a functional block diagram for comparing numbers; in FIG. 6 is a functional diagram of a control unit; in FIG. 7 functional diagram of the switch; in FIG. 8 functional diagram of the emergency call block; in FIG. 9 and 10 block diagram of the algorithm of the program executed by the information processing unit; in FIG. 11 timing diagrams of the signals at the outputs of the matching unit.

 The device for monitoring the movement of vehicles contains route sensors 1, on the vehicle a switch 2, a start check unit 3, a number comparison unit 4, a start signal generator 5, a two-channel transceiver 6, a control unit 7, a digital-to-analog converter 8, a distance sensor 9, a unit 10 coding, shaper 11 code of the route sensor 1, multiplexer 12, tangent 13, handset 14, position sensor 15 of the handset, indicator 16 deviations from the graph; the receiver 17, the emergency call unit 18 and the keyboard 19, at the control point, the first channel transceiver 20, the serial to parallel converter 21, the matching unit 22, the encoding unit 23, the information processing unit 24 and the second channel transceiver 25.

 The coding unit 23 consists of a clock pulse generator 26, an element 27, a single-shot 28, a shift register 29, a modulator 30 and a driving resistor 31.

 Block 3 start check contains a pulse generator 32, a demodulator 33, a counter-divider 34, a trigger 35, a counter-decoder 36 and a counter 37.

 Block 4 comparison of numbers contains a shift register 38, defining a resistor 39, two groups of switches 40 and 41, a group of exclusive-OR 42 elements, an element NOT 43, two OR-NOT elements 44 and 45, a parallel register 46, an element 47 2 OR, an element 48 AND .

 The control unit 7 contains AND-NOT elements 49 and 50, an exclusive OR element 51, an OR element 52, an AND element 53, inhibit elements 54 and 55, a tone frequency generator 56, a telephone 52 and a driving resistor 58.

 Switch 2 contains an element NOT 59 and keys 60-63.

 The emergency call unit 18 contains a two-position contact 64, two current-limiting resistors 65 and two triggers 66 and 67.

 The information processing unit 24 may be performed on the basis of a personal computer.

 The sensor 9 of the distance traveled converts the angular displacements of the shaft of the traction motor of the vehicle into a code corrected by setting it to zero by the signal of the route sensor 1.

 Block 10 coding for the start signal converts the parallel binary code generated by blocks 9, 12 and 19 into a serial code supplied to the second input of the switch 2.

 Shaper 11 of the sensor code converts the frequency-modulated signal of the i-th route sensor into a digital code.

On the block diagram of the program algorithm (Fig. 9 and 10) the following block designations are accepted:
1. Introduction of date and time.

 2. Call the mimic of the route to the display screen.

 3. Assigning to each segment of the route two specific positions on the display along the mimic diagram of the route: P1 (L) for direct movement; P2 (L) for the converse.

4. Data entry:
a) a list of codes of route sensors in the order from the beginning of the route M ₁ , M ₂ . M _j , M _p ;
b) the removal of route sensors from the beginning of the route Q ₁ , Q ₂ . Q _j , Q _p ;
c) the introduction of schedules of schedules (function of the location of vehicles from time to time in the form of a correspondence table).

5. Entry of initial values:
Δ _i 0; G _i 0, POND _i 0,
where i 1 n is the serial number of the vehicle;
POND _i sign of determining the direction of movement of the i-th vehicle;
Δ _i deviation from the schedule of the i-th vehicle;
G _i command call aboard the i-th vehicle.

 6. Permission for interrupts from the PC keyboard: entering into the interrupt vector from the keyboard the addresses of the routine for processing these interrupts; entering into the interrupt vector from the alphanumeric printing device (ADCU) the addresses of the routines for processing these interrupts from the ADCU; assigning the highest priority to interrupts from the ADCU.

7. Entry of the initial value
K 1
where K is the cycle number.

 8.i 1, l 1.

 9. Check In 1? where In the value of the signal from the third output of block 22 coordination.

10. The output to the output unit 24 of the information processing for vehicles (N _i , Δ _i G _i ), where N _{i are} vehicle numbers.

 11. Check A 1? where A is the signal value from the second output 22 matching.

12. Reading the received information received at the information inputs of the information processing unit 24, M _iK , L _iK , K _iK , M _iK route sensor code or vehicle identification number when responding to the emergency vehicle request; L _iK vehicle displacement code; K _iK code signal block 19.

13. ii _av ? where i _av code pointer for the emergency vehicle request.

14. WQ _j L _iK , where W is the absolute distance of the vehicle from the beginning of the route (NM) in the segments (discrete) of the route.

 15. The symbol TC _ → P2 (L) corresponding to W.

16. Determination by known location from the schedule of the planned time t _plan .

17. Determination of deviation from the graph: Δ _i t _plan t _tech , where t _tech current time.

18. Has ie reached TC NM?
19. POND _i +1
20. WQ _j + L _iK .

 21. The symbol TC -> P1 (L) corresponding to W.

22. Determination by known location from the schedule of the planned time t _plan .

23. Determination of deviation from the schedule: Δ _i t _plan t _tech .

24. Has ie TC reached KM?
25. POND _i -1.

 26. The conclusion to the display of the message corresponding to the code K with the symbol of the i-th vehicle.

 27. Does the location of the i-th vehicle correspond to the location of any control point.

28. t _{tech to} put in the array of the graph of the executed movement of the i-th vehicle in the column of this control point.

29. Check POND _i 0?
30. Definition of J _iK for M _iK , where J is the sequence number of the route sensor M _iK in the list of route sensor codes.

31. Check To 1?
32. J _iK J _{i (K - 1)} ?
33. M _iK , L _iK , K _iK , t _tech _ → RAM.

34. POND _i +1
35. POND _i -1
36. Is RAM full?
37. RAM-L RAM.

 38. Reservation of the array for the schedule of the executed movement of the i-th vehicle.

 39.l 10.

40. in?
41. KK + 1.

 42. i i + 1, l l + 1.

43. l 1, ii _fd .

44. Is M _iK the number of the vehicle?
45. N _av M _iK , where N _{av is the} code of the vehicle number from which the emergency call came.

46. The display on the screen the emergency call from the vehicle with the number N _av .

47. Symbols from the keyboard -LM _sim (array of characters).

48. M _sim determines the number of the vehicle?
49. Reset commands?
50. The command to print the executed movement of the i-th vehicle?
51. Definition i.

52. G _i 1.

53. G _i 0; i 1 n.

 54. Resolution of interruptions from the ADCU, q 1, where q is the serial number of the symbol of the array of the graph of the executed movement of the i-th vehicle.

 55. Exit from the interrupt.

 A subroutine for processing interruptions from the ADCP PC.

 56. The output of the q-th character of the array of the graph of the executed movement of the i-th vehicle.

57. The end of the array?
58. Prohibition of interruptions from the ADCU.

 59. q q + 1.

 60. Exit from the interrupt.

 A device for monitoring the movement of vehicles works as follows.

где T_г период частоты следования импульсов с генератора 32 импульсов;
t_старт длительность стартового импульса запросной кодограммы.Block 22 matching at its outputs generates signals (Fig. 11), ensuring coordinated in time operation of the blocks of the device. According to the signal from the third output of the matching unit 22, which is input to the second control input of the information processing unit 24, the information for broadcasting received by the first group of information inputs of the shift register 29 is output to the outputs of the latter. By the same signal, the And element 27 is opened for the clock pulses from the generator 26 clock pulses and starts a one-shot 28, which generates a signal for parallel recording of information received at the information inputs of the first group of register 29 of the shift. From the output of the latter, information in a serial code (Fig. 3) is fed to the input of the modulator 30. From the output of the modulator 30, the signal is fed to the input of the transceiver 20 of the first channel, which ensures the conversion of logical "0" and "1". Upon the arrival of the start pulse (Fig. 3) of the request code, the signal "0" allows the operation of the counter-divider 34. The division coefficient n is selected by the condition

where T _{g the} period of the pulse repetition rate from the generator 32 pulses;
t _start duration of the start pulse of the request code.

 As soon as a start pulse arriving from demodulator 33 satisfies the specified condition, an impulse appears at the output of the divider counter 34, switching the trigger 35 to the zero state, which allows the operation of the counter of the decoder 36 and the counter 37.

где F_г частота генератора 32;
f_m скорость передачи информации, бит/с.The coefficient of the counter-decoder 36 m ₁ is selected by the condition

where F _{g the} frequency of the generator 32;
f _m information transfer rate, bits / s.

 Counter 37 counts the number of bits of information after the start. The counter-decoder 36 generates at its outputs signals "1" corresponding to the state of the counter. From its first output, a gating signal falling into the middle of the bit is removed. At the end of the reception of information, a signal appears at the output of the counter 37, which enables the trigger 35 to switch to its initial state, i.e. transfer of start check block 3 to its initial state.

 The following signals are received to the unit 4 for comparing numbers from the start check unit 3: from the output of the demodulator 33, a sequential code codogram, gate pulses from the first output of the counter-decoder 36, a signal for the end of reception of information from the output of the counter 37.

 From the first output of the start check unit 3, the information in the serial binary code is received at the information input of the shift register 38. Writing information to the shift register 38 begins with the first bit of the codogram following the start. Under the action of the strobe pulses coming from the second output of the start check unit 3, the shift register 38 is filled with information transmitted from the control point (N, ± Δ G). The bits of the shift register 38, into which the transmitted number falls, are each connected to the first inputs of the corresponding pair of exclusive 42 elements, the second inputs of one element are connected to the buses "0" or "1" by the switch 40 depending on the encoded vehicle number. The second inputs of another XOR element through a switch 41 are connected to the bus "0" or "1" depending on the emergency code, which is the same for all vehicles. If the number in the request codogram matches the encoded number on the vehicle (encoded using the switches 40), the signal for the end of reception of information from the third output of the start check unit 3, passing through the element NOT 43, generates a gate signal at the output of the OR-NOT 44 element for recording information in parallel register 46 from shift register 38. The same signal, which is supplied to the driver 5 of the start signal from the output of the OR element 47, the vehicle equipment is transferred to the information transfer mode. In the case of comparing the emergency number encoded by the switches 41 with the number in the codogram, the signal from the element 45 OR NOT passes through the element 48 And only when through the contact 64 in the emergency call block 18 the output of the trigger 67 is set to one (an emergency command will be generated call). The launch of the vehicle equipment transfer will occur in the same way as when comparing the vehicle number, only there will be no update of information in the parallel register 46. Given that the emergency vehicle is requested, for example, every 10 requests (time interval of about one second), the command about an emergency call from the transport will arrive at the control point after the specified time interval after the command is sent to the vehicle. The likelihood that more than one emergency call will be required at a time for the processing of one emergency call is very small. If this happens, then the emergency call command will come from the vehicles to their next request, since the simultaneous inclusion of more than one equipment on the transmission will not allow reliable identification of the vehicle at the request of the emergency vehicle. The discharge in the parallel register 46, responsible for the call to the voice communication of the driver, is connected to the control unit 7 and to the input of the emergency call unit 18. When the call command for voice communication arrives on board the vehicle, the emergency call command is reset at the input of the R-trigger 67 (block 18). The remaining bits of the parallel register 46 are connected to the inputs of the digital-to-analog converter 8.

The operation of the control unit 7 is described by a truth table corresponding to the logic circuit shown in FIG. 6 where
and the value of the signal from the tangent is 13 (1 press, 0 release);
b value of the signal from the sensor 15 for the position of the handset (1 - the handset is picked up; 0 the handset is inserted into the handset holder);
with a signal from driver 5 of the start signal (1 active, 0 - passive);
d G information about the call of block 4 (1 call is, 0 call is not);
X function of the radio station mode (1 reception, 0 transmission);
Y channel switching function of the transceiver 6 (0 first channel, 1 second channel);
Z function to turn on the sound signal (1 alarm is on; 0 is off).

 When working on the first channel, the two-channel transceiver 6 operates in the mode of reception / transmission of digital information and its first input and output through the switch 2 are connected to the output of the coding unit 10 and to the input 3 of the start check unit.

 When switching a two-channel transceiver 6 from the first channel to the second and first input and its output via the switch 2 are connected respectively to the output and input of the handset 14.

 The processing of the information received at the control point and the formation of the information transmitted to the vehicle is carried out in accordance with the block diagram of the algorithm shown in FIG. 9 and 10.

 After starting the program, the information processing unit 24 (PC) performs a number of preparatory operations (1 8 blocks of the flowchart of the algorithm).

Then block 9 (Fig. 9) is a survey of the availability of equipment at the control point to the request mode of the i-th vehicle. The readiness flag (B) is set by the matching unit 22 at the second input of block 24. At B 1, information (N _i , D _i G _i ) is output to the output of the information processing unit 24. From the output of the coding unit 23, the tone signal of the frequency (phase) modulator comes to the input of the transceiver 20 of the first channel. At this time, the vehicle equipment, working in the information reception mode, determines the start signal and compares the number in the request codogram with its number or, if an emergency call is formed on board, with the emergency number code. That vehicle, whose number coincides with the number sent by the control point, receives the codogram. The information received on the vehicle contains a code on the deviation from the schedule and a command on board about a call to voice communication.

When the device is operating in the first cycle (K 1), the deviation and the call command will have the values Δ _i 0; G _i 0; i 0 n). In accordance with this, the arrow of the deviation indicator from the graph will be set to the neutral position 0, and there will be no call to voice communication.

After receiving the information, the equipment of the i-th vehicle is transferred to the mode of transmitting information to the control point. At this time, the equipment at the control point is in a state of waiting for the flag of readiness to enter information into the PC memory. After receiving information from the i-th vehicle from the outputs of the serial code converter 21 into parallel, the received information M _ik , L _ik , K _{ik is} received in the information processing unit 24. This information is sequentially processed according to the algorithm of the program, after which the next vehicle is interrogated. After, for example, ten requests for vehicles, we study the codogram for the emergency call request with the number N _av . Based on the information received, the following cycles determine the locations of all vehicles on the route. One of the schedules is determined by the location of the vehicle; the schedule is the planned time of arrival at a given point of the route (by interpolation at the given control points of schedules - schedules). Then, if the location of the vehicle corresponds to the location of the control point on the route, then the t _{tech is} entered into the array of the formation of the execution of the movement of the ith vehicle (blocks 27 and 28 are a block diagram of the algorithm). According to the planned time and current, the deviation from the schedule of the i-th vehicle is determined and entered in the information output buffer for the i-th vehicle in Δ _i . Further, this information, arriving on board the vehicle, is displayed on the deviation indicator from the schedule.

For voice communication between the dispatcher and the driver, a vehicle number is dialed on the PC keyboard. A keyboard interrupt is executed and the program jumps to the beginning of the address of the keyboard interrupt processing routine. The subroutine determines the number of the vehicle in the cycle i and G _{i is} assigned the call value G _i 1. Having received this information, the equipment of the i-th vehicle responds in such a way that when the handset 14 is inserted into the handset, the handset 57 of the control unit 7 starts to emit sound signal. When you pick up the tube 14, the audible alarm stops and the two-channel transceiver 6 goes to the second channel. Voice communication is carried out with the dispatcher through a single-channel transceiver 25 of the second channel. After a radio session, the driver inserts the handset 14 into the handset, and the dispatcher types a command reset symbol on the keyboard. When the initiator of the communication session is the driver, he sends a call command to the phone using the keypad 19 on the vehicle. If emergency voice communication is required, the driver, using the emergency call unit, generates this requirement. In this case, at the control point, an emergency call request message will be received almost instantly (for example, after one second). This information received at the control point will be converted into a command to the dispatcher on the display screen of the microcomputer. Then the dispatcher will perform the described operations for voice communication.

 To implement the graph of the executed movement of the i-th vehicle on the keyboard, you need to dial its number with the graph print symbol. The keyboard interrupt routine determines the vehicle i and gives permission to interrupt from the ADC. The interrupt processing subroutine from the ADCU outputs to the ADCU a graph of the executed movement. After the end of the output, interruptions from the ADC are prohibited and the equipment at the control point returns to its original state.

Claims (2)

 1. A device for monitoring the movement of vehicles, containing route sensors, on a vehicle a two-channel transceiver, the output of which is connected to the first input of the switch, the second output of which is connected to the input of the start check unit, the first, second and third outputs of which are connected to the inputs of the comparison unit of the same name numbers, the first output of which is connected to the first input of the control unit, the third and fourth inputs of which are connected respectively to the output of the tangent and to the output of the microthe position sensor lefon tube, and the second input is connected to the third input of the coding unit and to the output of the driver of the start signal, the input of which is connected to the third output of the number comparison unit, the coding unit, the fourth and second inputs of which are connected respectively to the keyboard output and the sensor output of the distance traveled, input which is connected to the output of the sensor code driver, the input of which is connected to the output of the signal receiver, a digital-to-analog converter, the output of which is connected to the deviation indicator from the graph, and the input is connected it is connected to the second output of the number comparison unit, the output of the coding unit is connected to the second input of the switch, the third output of which is connected via a handset to its own third input, and the fourth input is connected to the second control input of the two-channel transceiver and to the second output of the control unit, the first output of which is connected to the first control input of the transceiver, the input of which is connected to the first output of the switch, at the control point, the transceiver of the first channel, the output of which is connected to the first input of the serial to parallel converter, the output group of which is connected to the information inputs of the information processing unit, the output group of which is connected to the input group of the coding unit of the control point, a matching unit, the first and second outputs of which are connected respectively to the second input of the serial code converter to parallel and with the first input of the information processing unit, the second input of which is combined with the control input of the coding unit of the control point, with the second input ohm of the transceiver of the first channel and connected to the third output of the matching unit, the output of the coding unit of the control point is connected to the first input of the transceiver of the first channel, the transceiver of the second channel, characterized in that the vehicle has an emergency call unit and a multiplexer, the input of the emergency call unit is connected to the first the output of the number comparison unit, and its output is connected to the keyboard input, to the fourth input of the number comparison unit and to the first input of the multiplexer, the output of which is connected to the first input of the coding unit, and the second and third inputs are connected respectively to the second output of the sensor code generator and to the fourth output of the number comparison unit.  2. The device according to claim 1, characterized in that the unit for comparing numbers contains a shift register defining a resistor, the first and second groups of switches, a group of pairs of elements EXCLUSIVE OR, an element NOT, the first and second elements OR NOT, a parallel register, an OR element and the And element, the information and clock inputs of the shift register are respectively the first and second inputs of the block, the output of the shift register is connected to the information input of the parallel register, the output of which is the first output of the block, and the group of outputs the second output of the block , the first group of outputs of the shift register is connected to the group of information inputs of the parallel register, each output of the second group of outputs of the shift register is connected to the first inputs of the corresponding EXCLUSIVE OR element pair, the outputs of the first of the pairs of EXCLUSIVE OR elements are connected to the inputs of the first OR-NOT element, the output of which is connected with the clock input of the parallel register and with the first input of the OR element, the output of which is the third output of the block, and the second input is connected to the output of the AND element, the first input of which is the fourth input of the block, and the second input is connected to the output of the second OR-NOT element, the inputs of which are connected to the outputs of the second of the pairs of EXCLUSIVE OR elements, the second inputs of which are connected to the corresponding outputs of the second group of switches, the first inputs of which are connected to the first inputs of the first group of switches and through a master resistor with a positive power bus, the second inputs of both groups of switches are connected to the bus of zero potential, the outputs of the first group of switches are connected to the second inputs of the first of the corresponding The corresponding pairs of elements are EXCLUSIVE OR and are the fourth output of the block, the output of the element is NOT connected to the last inputs of both elements, OR NOT, and the input is the third input of the block.

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