Microsoft Word - 4e819eb5c924b93df98fcdcb890ab786eb3eb37dada492bacbcddf87c177574c American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 77 | P a g e MODELING OF THE “Y” AND “G” CODE TRANSMISSION PROCESS OF THE MICROELECTRONIC CODE TRANSMITTER USING PETRI NETS Nazirjon Mukramovich Aripov Doctor of Technical Sciences, Professor, Tashkent State Transport University. Tashkent Zafar Fakhridinovich Mirzarakhmedov Senior Lecturer of the Driver Training Center under the Tashkent Transport College Shukhrat Batirovich Djabbarov PhD, Docent, Tashkent State Transport University. Tashkent ANNOTATION Currently, microprocessor, microelectronic systems and devices used in railway automation and remote control systems are widely used. The use of systems and devices for railway automation and remote control, developed on the basis of microelectronics and microprocessor elements, provides an increase in the level of reliability compared to systems based on electromagnetic relays. In this article, the modeling of transmitter relays designed to transmit the codes generated by the KPTSH transmitter to road traffic lights and locomotive traffic lights in rail chains equipped with auto-blocking systems and automatic locomotive signaling systems at the joint-stock company «Uzbekistan Temir Yollari» is considered. The process of modeling «Y» and «G» codes (For yellow and green codes) based on Petri net graphs of the newly developed integrated microprocessor code transmitter for the transmission of codes formed in railway automation and telemechanics systems is considered. Time descriptions of transmitter relay pulses and «Y» and «G» codes pulse and interval timing diagrams for transmitter relays. In addition, «Y» and «G» codes have been studied. Keywords: automatic blocking, locomotive automatic signaling, track circuits, code, processes, anchor, relay, Petri nets, graphs. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 78 | P a g e One of the most acute scientific problems in the field of railway automation and telemechanics is to ensure the safety level and reliability factor of control systems and equipment, as well as to improve the areas of analysis and synthesis of their work [1- 12]. In order to increase the level of safety in the devices and systems of railway automation and telemechanics, multi-channel control methods have been introduced. The basis of these channels is equipment, software and time reserve, and the goal is to create reserves for the safety and stability of elements, to eliminate equipment failures in the system [12-19]. To date, when implementing the same methods of improving safety on railways, the operating conditions of equipment and systems of railways, the development of railways and the speed of trains operating on them are not always taken into account [8]. As a result, the use of only one technical solution to increase the level of security in most cases leads to the fact that software and hardware systems work more than necessary, which reduces the efficiency of work and complicates their structure. Therefore, it becomes relevant to increase the level of safety in the operation of equipment and systeMS of railway transport, the development and implementation of methods for assessing their impact on the movement of trains and taking into account economic factors. Petri nets are a tool for implementing the system. The theory of Petri nets makes it possible to model railway automatic and telemechanics systems in a mathematical hypothesis. The theory of Petri nets was developed to model parallel processes in systems. Petri nets are built on the basis of P processes, T conditional transitions, I input and O output elements of the problem. Input and output functions are interconnected through processes and conditional jumps. This ensures the correspondence of processes and conditional transitions in the structure of Petri nets [17-20]. The difference between pulses and intervals in the transmission of the relay code of TSH transmitters requires the implementation of separate processes for each code in Petri graphs. Based on the generated Petri charts below, the TSH-65 and TSH-2000 relays. Let's get acquainted with the modeling for the code «Y- (for Yellow)». American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 79 | P a g e Figure 1. Diagram of the time characteristics of the pulse intervals in the code “Y” for the relay-transmitters TSH-65 and TSH-2000. Table 1 lists the processes and descriptions of the processes in Petri nets for the code «Y»: Table 1 Order of proceedings Purpose of the procedure P1 The supply was given and the impulse started to come. P 2 During the pulse, the process of raising the armature of the RT relay. P3 The process of checking the arrival of a pulse for 380 MS. P4 70 MS to reset the RT relay within the interval after the end of the delay time pulse. Р11 P5 Dropping of RT relay armature . Р6 Processing interval 50 MS. Р7 Relay armature lifting RI. Р8 The delay in the arrival of the pulse and the armature of the relay RI is 80 MS and the process of the arrival of the pulse is 380 MS. Р13 Р9 Delay time 80 MS for the arrival of the pulse and deactivation of the armature of the relay RI after the process of checking the timeout interval. P10 Relay armature drop RI Р12 Process arrival interval 650 MS Order of conditions Assigning transition conditions t1 Start of pulse reception 0÷380 MS t2 Checking the transition condition to the interval after the end of the impulse. t3 After a delay of 70 MS, the armature of the PT relay switches from on to de-energized. t12 t4 Checking if the 70 MS delay time expires and the 50 MS interval continues. t5 Checking the start of the 80 MS delay after the 50 MS interval. t6 Check pulse arrival for 300 ms. t7 After a delay of 70 MS, relay RT is de-energized and RI is turned on. t8 80 MS latency check after 650 MS interval. t9 Relay RI de-energized. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 80 | P a g e Figure 2. Code “Y” Initial state of the transmitter relay TSH when power is connected Graphical representation of a Petri net The graph uses state transitions t1, t2, ........ and t14 and positions P1, P2 ......... and P16. In figure 2, when the power is connected and a pulse is input, the Р1 chip activates the position. And the transition condition t1 checks the fulfillment of the condition for receiving an impulse within 380 MS, and if the condition is met, outputs O( t1) = {P2, P3} are formed. These outputs activate the positions shown in Figure 3. As a result of the activation of the process P2 by the transition t1, the relay PT picks up the armature, i.e. it changes to the current state. And process P3 controls the process of receiving a pulse to P2 for 0÷380 MS. After the specified time has elapsed, I(t2)={P3} checks the condition for the beginning of the interval at the end of the input pulse. Figure 3. When the power is connected to the relay of the TS transmitter for the code “Y”, a pulse with a duration of 0÷380 MS arrives. Representation of the Petri net graph T1 T2 T3 T4 T5 T6 T7 T8 T9 American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 81 | P a g e Checking for another 70 MS delay before the end of the pulse to drop the armature RT is created by activating position P4 (fig. 4). Figure 4. Plot of the Petri net of the 70 MS delay process for checking the drop of the РT armature for the “Y” code when power is applied After the 70 MS delay time for R4 to de-energize the RT armature, the I(t3)={P4,P10} inputs check that the armature is fully de-energized, that is, the process condition for RT transitioning from the energized state to the de-energized state. Figure 5. Petri net plot of РT anchor drop and 50 MS interval for code “Y”. In Figure 5, as a result of the output O(t3)={P5}, a chip is generated in process R5, which represents that the RT anchor has dropped. The occurrence of the output O(t3)={P7} is the basis for the transition of the armature RI from the de-energized state to the on state. And the output O(t3)={P6} activates the P6 position, P6 in turn organizes the interval duration process for 50 MS. The sequential occurrence of P4 and P6 processes ensures a total interval of 120 MS. After the process of P6 is completed, we have the output O(t4)={P2} and thus start sending a pulse to start cycle 2. T1 T2 T3 T4 T5 T6 T7 T8 T9 American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 82 | P a g e Figure 6. Plot of the Petri net of the 80 MS delay process for checking the drop of the RI armature for the “Y” code when power is applied I(t5)={P8} checks the start condition after a delay of 80MS after parameter t5 is enabled. When this condition is met, process P8 is activated. Figure 6. Figure 7. (Image of Petri nets of impulse arrival for 300 MS) The R9 position is activated by the input I(t6)={P9}. The P9 state represents the arrival of a 300 ms pulse. At the same time, the process of activation also occurs in the P2 state, which means that the RT armature is in a live state. Figure 8. Plot of the Petri net of the 70 MS delay process for checking the drop of the РT armature for the “Y” code when power is applied American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 83 | P a g e (I(t7)={P11} input shows the execution process of the delay time condition for R11 position RT anchor to fall. I(t7)={P10,R11} inputs represent the end of 70 MS delay.) Figure 9. Interval of 650 the code «Y» Petri net chart (O(t7)={P12} is generated when process R12 is activated, which means that there is an interval of 650 MS. It is shown that the RT armature switches from the uncurrent state to the current state as a result of the generation of the output O(t8)={P2}.) Figure 10. Plot of the Petri net of the 80 MS delay process for checking the drop of the RI armature for the “Y” code when power is applied Fig. 10 (The fact that we have input I(t7)={P2} means that the pulse start process and the pulse arrival process 380 MS into the cycle are activated.) As a result of the input I(t9)={P13}, it is expressed that the 80 MS delay process shown in its technical characteristics occurs for the transition of the RI armature from the current state to the non-current state. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 84 | P a g e Figure 11. Beginning of the 2nd cycle for the code “Y” Petri net chart I(t9)={P7,R13} shows that as a result of the fulfillment of the input conditions, RI lowers its anchor through the output O(t9)={P10}, meaning that the interval is over. And through the output O(t9)={P3}, the code "Y" returns to its original state. These processes will be started again if the code “Y” will not change, and will continue in that order. Extended input (I) and output (O) functions for the Petri graph in the code “Y” of the TSH-65 relay are presented in Table 2. Table 2 I(t1) = {P1} O(t1)={P2,P3} I(t2)={R3} O(t2)={P4} I(t3)={R2,P4} O(t3)={P5} I(t4)={P4} O(t4)={P6} I(t5)={P6} O(t5)={P8} I(t6)={P5} O(t6)={P7} I(t7)={P8} O(t7)={P9} I(t8)={P7,R8} O(t8)={P10} I(t9)={P9} O(t9)={P12} I(t10)={P6} O(t10)={P11} I(t11)={P12} O(t11)={P13} I(t12)={P11,R12} O(t12)={P14} I(t13)={P14} O(t13)={P15} I(t14)={P13} O(t14)={P1,R16} I(t15)={P15,R16} O(t15)={P17} Corresponding to the expression in table 2, the expression for matrices 1 and 2 in shape. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 85 | P a g e 0 0 1, , 0, I j j j I j j agar p P t t T p i agar p P t t T p                Matrix 1 P13P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 t9 t1 t2 t3 t4 t5 t6 t7 t8 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 =I= tτε Matrix 2 P13P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 t9 t1 t2 t3 t4 t5 t6 t7 t8 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 =O= tτε Below we will get acquainted with how the Petri graphs for the« G - (for grenn)» code are expressed. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 86 | P a g e Figure 12. Diagram of the timing characteristics of pulse intervals in the code «G» for relay-transmitters ТSH-65 and ТSH-2000. Table 1 lists the processes and descriptions of processes in Petri nets for code «G» Table 1 Order of proceedings Purpose of the procedure P1 The supply was given and the impulse started to come. Р2 Dropping of РT relay armature . P3 The process of checking the arrival of a pulse for 350 MS (milliseconds). P4 РТ relay anchor drops during the interval after the pulse ends expiration of the delay time in 70 MS. Р11 Р15 P5 During the pulse, the process of raising the armature of the РT relay. Р6 Interval process for 50 MS. Р12 Р7 Dropping of РИ relay anchor. Р8 80MS delay time for pulse arrival and РИ relay armature drop out after interval timeout check process. Р13 Р17 Р9 Pulse arrival and РИ relay armature delay of 80 MS and pulse arrival process of 220 MS. Р14 P10 The rise of РИ relay armature. Р16 Interval arrival process for 500 MS Order of conditions Assigning transition conditions t1 Start receiving pulse 0÷350MS t2 Checking the transition condition to the interval after the end of the impulse. t6 t10 t3 After the 70 MS delay, the armature of the РТ relay switches from the energized state to the de-energized state. t7 t11 t4 Checking of the 50 MS interval continues after the 70 MS delay time. t8 t5 Checking the start of the 80 MS delay after the 50 MS interval. t9 t12 Checking of the 500 MS interval comes after the 70 MS delay. t13 Checking of 80MS delay timeout and RI relay switching to no current state. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 87 | P a g e The graph consists of transitions t1, t2, ........ and t22 and processes P1, P2 ........ and P17. Figure 13. «G» code TSH transmitter relays start state when supply is connected Graph representation of Petri net A power-on pulse activates process P1. As a result of the fulfillment of the condition for the arrival of a pulse for a period t1 350 MS, we obtain outputs O( t1) = {P3, P5} (Fig. 13). Figure 14. TSH transmitter relays for «G» code when the power supply is connected 0÷350 MS pulse receiving state representation of the Petri net graph. T2 T3 T4 T6 T7 T11 T12 T2 T3 T4 T6 T7 T11 T12 American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 88 | P a g e Outputs O(t1) = {P3, P5} activate the processes shown in Figure 14. Process P3 is used to transfer the armature of the relay РT to the current state as a result of the condition t1. And the P5 process controls the process of the pulse input to the РT armature for 0÷350 MS. 350 MS after the input of the pulse on arrival, I(t2)={P4} checks the condition for the beginning of the interval after the end of the input pulse (Figure 14). Figure 15. Petri net plot of 70MS delay process testing РT anchor drop for code «G». Figure 15 shows that the delay time of 70 MS for the execution of the input data I(t3)={P6,P10} to release the РT armature due to the activation of the P4 process has ended. Figure 16. Petri net plot of РТ anchor drop and 50 MS interval for code “G”. In Figure 16, generating output O(t3)={P2} results in a token in process P2, which represents the fall of the РT armature. O(t3)={P6} passes through the chip to process P6. And in this process there is a time interval of 50 ms. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 89 | P a g e A total of 120 ms of latency and interval time ensures that the interval is fully implemented. The end of the interval sets the stage for the start of the next impulse process via the output O(t4)={P5}(Fig. 6). Figure 17. РИ anchor rise for «G» code Petri net graph When O(t4)={P8} output occurs, the t5 condition controls the interval and the 80MS interval delay start condition. After that, process P7 and P9 is activated with output O(t5)={P7,P9}. The appearance of a microcircuit on P9 starts the process of entering a pulse for 220 MS (Fig. 17). Figure 18. Delay time for РИ anchor drop for «G» code Petri net graph T2 T3 T4 T6 T7 T11 T12 T2 T3 T4 T6 T7 T11 T12 American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 90 | P a g e Figure 18 shows the process of fulfilling the condition of the delay time for the РИ anchor to drop as a result of the activation of the process P7 through the input I(t6)={P9}.The presence of input data I(t5)={P8,P10} indicates that the delay of 80 MS has ended. The fulfillment of the condition t8 activates the process P9, the appearance of a flash in the process P9 is considered evidence that the armature РИ has passed from the on state to the de-energized state. Therefore, the first impulse and the interval come to an end. O(t4)={P8} indicates that the second pulse has started. Figure 19. Graph of the Petri net showing the beginning of the 2nd cycle and the arrival of the pulse between 470 ÷ 690 MS for code «G» The activation of process P11 indicates that the reception of pulses has begun. Activation of the P12 process serves to lift the РT anchor. The transition of the РT armature to the current state is a process of an incoming pulse with a duration of 220 MS (Fig. 19). Figure 20. Plot of the Petri net of the transition of the РТ armature from the energized state to the de-energized state for code «G». American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 91 | P a g e In Figure 9, output O(t6)={P11} is generated and P11 is activated. As a result, the РT lowers the anchor. The transition of the РT from the on state to the de-energized state means the end of the pulse in the second cycle. Activating P12 causes the interval to last 50 ms and input I(t8)={P12}. Figure 21. Petri net plot of РИ anchor transition from dead to live for G code. Generation of output data O(t7)={P10} serves to raise the РИ anchor. And the input I(t8)={P12} checks the interval condition for 50 MS( Figure 21). Figure 22. Petri net plot of the сurrent to uncurrent РИ anchor transition for code «G». T2 T3 T4 T6 T7 T11 T12 T2 T3 T4 T6 T7 T11 T12 American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 92 | P a g e Figure 22 illustrates the 80MS delay that goes into lowering the РИ anchor in process P16 via output O(t8)={P13}.The execution of this process generates the input I(t9)={P10,P13} and checks the conditions for the transition of the t9 РИ armature from the on state to the de-energized state. Therefore, after the interval and delay time has elapsed, process P7 is activated, and the switchgear armature goes into the open state. Therefore, the second impulse and the interval come to an end. The appearance of the output O(t8)={P13} means that the process of the third impulse has begun. The chip appears in the process P14 through the output O(t9)={P14}. Figure 23. Petri net graph of pulse arrival for 810÷1030 MS for «G» code. O(t9)= {P14} in process P14 via output 810÷1030 MS interval indicates that the pulse is present. (t10)={P15} outputs a 70ms delay to drop the RT anchor in process P15. (Fig. 23). Figure 24. Plot of the Petri net of the transition of the РT anchor from on to off for the code «G» American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 93 | P a g e After checking that the impulse came completely through the conditional t11, we get the input I(t11)={P5,P15}. This, in turn, activates process P2 to switch the armature РT from the on state to the de-energized state. Through the output O(t11)={P16} in the process P16, the interval of 500 MS begins (fig. 24). Figure 25. Graph of the Petri net of the transition of the РИ armature from a de- energized state to on for the code «G» Figure 25 shows the transition to the current state due to the rise of the armature РИ in the process of Р10 through the output O(t11)={P10}.As a result of exit O(t11)={P16} process P16 is activated represented by interval 1100÷1600 MS. Figure 26. Plot of the Petri net after three impulses and three intervals for the code «G». American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 94 | P a g e The appearance of the inputs I(t13)={P17,P10} activates the check of the end of the interval and return to the initial state. O(t13)={P3} activates process P3 via exit. Which, in turn, is equal to 0÷350. When organizing the arrival of through the impulses and intervals for the code «G» mean that the sequence of arrivals starts again from the beginning of Fig. 26 . The fulfillment of the condition t12 leads to the output O(t22)={P7} in addition to the output O(t12)={P17}. As a result, the P17 process is activated, and after the delay time of 80 MS for the fall of the РИ armature, the РИ armature is de-energized, thereby completing the third interval . Extended input (I) and output (O) functions for the Petri graph in the code «G» of the TSH-65 relay are presented in Table 4. table 4 I(t1)={P1,P5} O(t1)={P3,P5} I(t2)={P3} O(t2)={P4} I(t3)={Р4,P5,P7} O(t3)={P2,P6,P10} I(t4)={P2,P4} O(t4)={P5,P8} I(t5)={P8,P10} O(t5)={P7,P9} I(t6)={P9} O(t6)={P11} I(t7)={P5,P7,P11} O(t7)={P2,P10,P12} I(t8)={P2,P12} O(t8)={P5,P13} I(t9)={P10,P13} O(t9)={P7,P14} I(t10)={P14 } O(t10)={P15} I(t11)={ P5,P7,P15 } O(t11)={P2,P10,P16} I(t12)={P10,P16} O(t12)={P7,P17} I(t13)={P12,P17} O(t13)={P3,P5} Corresponding to the expression in Table 2, the expression forms a matrix of shapes 3 and 4. 0 0 1, , 0, I j j j I j j agar p P t t T p i agar p P t t T p                Matrix 3 American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 95 | P a g e P13P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 t9 t1 t2 t3 t4 t5 t6 t7 t8 0 0 0 0 0 0 0 0 0 0 0 0 0 =I= tτε P15P14 P16 P17 t13 t10 t11 t12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Matrix 4 P13P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 t9 t1 t2 t3 t4 t5 t6 t7 t8 0 0 0 0 0 0 0 0 0 0 0 0 0 P15P14 P16 P17 t13 t10 t11 t12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 =O= tτε Conclusion In the field of automation and telemechanics of Joint Stock Company «Uzbekistan Temir Yollari « in the field of autoblocking and automatic locomotive signaling, the Petri graphs of the integrated microelectronic code transmitter device, which are proposed to be used instead of TSH-65 and TSH-2000 relays, which serve to transmit the codes generated by the KPTSH relay to the locomotive traffic lights or road traffic lights, are based on «Y ” was modeled for the code. As a result, it is recommended to abandon contact devices and use a new type of microelectronic device. American Journal of Interdisciplinary Research and Development ISSN Online: 2771-8948 Website: www.ajird.journalspark.org Volume 10, Nov., 2022 96 | P a g e In the field of railway automation and telemechanics, code transmitting devices are modeled on the basis of Petri nets, and the processes occurring in the delivery of existing «G» codes in sections equipped with autoblocking and automatic locomotive signaling are described by the example of Petri graphs. Each described process was studied in the Petri Mathematical Simulator. Used Literature 1. Soroko V. I., Fotkina Zh. V. Equipment for railway automatics and telemechanics: Reference book: in 4 books. Book. 1. - 4th ed. - M .: LLC «NPF» PLANET «, 2013 - 1060 p. 2. Kazanov A. A. et al. Systems of interval regulation of train traffic / A. A. Kazakov, V. D. Bubnov, E. A. 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