CN112484620A

CN112484620A - Automatic double-Gray bus address coding switching device

Info

Publication number: CN112484620A
Application number: CN201910860307.1A
Authority: CN
Inventors: 刘春祥; 岳鑫先; 柯青春; 季益龙; 李庆寿
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2021-03-12
Anticipated expiration: 2039-09-11
Also published as: CN112484620B

Abstract

The invention relates to a double-Gray bus address coding automatic switching device, which can automatically judge the abnormality of equipment and switch to a bus which normally works when a mobile vehicle is abnormal in Gray bus address decoding alignment by adopting a double-Gray bus method, and simultaneously feed back and alarm to maintenance personnel, so that the maintenance personnel can find the abnormality and maintain the equipment in time, sufficient time is provided for equipment replacement and maintenance, and the occurrence of furnace shutdown of the mobile vehicle due to the fault of the address Gray bus is avoided.

Description

Automatic double-Gray bus address coding switching device

Technical Field

The invention relates to an automatic switching device, in particular to an automatic switching device for address coding of a dual gray bus, and belongs to the technical field of detection control.

Background

Coking enterprises adopt a large number of mobile vehicle coding positioning to carry out automatic production operation, and vehicles of four large coke ovens (coke pushing cars, coke guide cars, coal feeding cars and electric locomotives) generally adopt address coding plate positioning, rotary coding positioning, infrared positioning and induction gray bus positioning technologies. With the continuous improvement of the safety production requirement of the coke oven and the improvement of the requirement of the automatic control of the locomotive, the problems that the stability and the anti-interference capability of the locomotive address detection are improved and the absolute continuous address of the detection equipment is improved under the severe working condition environment of a coking enterprise are solved. However, the existing equipment positioning technology has self limitations: the rotary encoder technology detects that the address has deviation under the conditions of vehicle slipping, rainy days and the like, and the address needs to be calibrated for many times; the coding plate technology adopts a row of address coding plates arranged in the running direction of a moving vehicle, and a reading head reads spaced discrete data in the process of passing through the coding plates, so that the relative distance range of the reading head and the coding plates has strict requirements (generally, the distance is required to be kept between 20mm and 30 mm), but in the running process of equipment, the situation that the reading head fails to read due to overlarge position change (exceeding the range of 20mm to 30 mm) of the coding plates often occurs, and further the automatic running fixed-point alignment of the vehicle fails; the infrared positioning technology adopts the technical scheme that the movable and fixed scales can work only by using a direct-current power supply, and the reliability is low in the severe coke oven environment; when a single gray bus is applied, a standby system is not arranged, and when the full-automatic operation fails, the automatic operation efficiency is influenced by longer fault removal time. In view of the technical problems existing at present, a new solution is needed to solve the above problems.

Disclosure of Invention

The invention provides an automatic double-Gray bus address code switching device aiming at the problems in the prior art, the technical scheme can use two groups of Gray buses to form a double-positioning induction continuous detection device so as to be suitable for the purpose of automatic running of a coke oven locomotive, the device can automatically record abnormal coded address information to make judgment, when a Gray bus fails, the device can automatically switch to the other Gray bus, and alarm prompt is carried out on a current fault cable, so that automatic running and full-automatic continuity of a vehicle are ensured, and safe and reliable automatic running of a moving vehicle is finally realized.

In order to achieve the above object, according to the present invention, an automatic switching device for double gray bus address coding is characterized in that the device includes a 1# gray bus, a 2# gray bus, an upper coil of an antenna box, a lower coil of the antenna box, a 1# terminal resistor, a 2# terminal resistor, a communication connection line, a decoder, a decoding communication plc, a vehicle switch, a vehicle radio station slave station, a vehicle radio antenna, a radio communication ground master station, a radio communication ground antenna, a ground switch, a ground communication plc, a gray bus switching circuit, a 1# gray bus signal generator, and a 2# gray bus signal generator; the double-address decoding system comprises a 1# Gray bus and a 2# Gray bus, an antenna box coil receives a 1# Gray bus signal, the antenna box coil receives a 2# Gray bus signal, the 1# Gray bus comprises a 2# Gray bus signal generator and a 1# terminal resistor to form a signal sending loop, the 2# Gray bus comprises a signal generator and a terminal resistor to form a signal sending loop, a logic switching circuit (switching when the Gray bus is put in) comprises a ground communication PLC and a Gray bus switching circuit, and the switching between the Gray buses is controlled by the Gray bus switching circuit when the ground communication PLC judges that the signal fails so as to stabilize the encoded address signal; when the upper coil of the antenna box and the lower coil of the antenna box (received by the coils when a gray bus is used and received by the coils when the gray bus is used) receive gray bus signals, the gray bus signals are transmitted to the upper part of an address decoder by a communication connecting line for decoding, the decoded absolute address is sent to a decoding communication plc after the decoding is finished, the decoding communication plc carries out data transmission through a vehicle-mounted switchboard and the vehicle-mounted plc, the vehicle-mounted plc carries out data conversion, absolute value data decoded by the address is converted into a coke oven number for full-automatic operation control, the vehicle-mounted plc transmits the address decoding data to a wireless communication ground antenna and a wireless ground base station through a vehicle-mounted wireless communication radio station slave station and a wireless antenna, and the address decoding signals and the converted data oven number are connected to the ground switchboard by optical fibers to complete communication between the ground communication plc. In the scheme, a double-address coding system consisting of double Gray buses can be mutually standby, when one group of equipment has problems, the other group of equipment can be put into use in time to ensure the smooth operation of full-automatic production, but the auxiliary equipment such as a receiving antenna box, a decoder and a signal generator which are required to be matched when one group of Gray bus cables is put into use are also put into use at the same time, so that the equipment cost is increased, and the purposes of cost reduction and efficiency improvement of enterprises are violated; therefore, the double-address gray bus adopts an up-and-down layout mode in consideration of cost, and a vehicle inspection double-coil antenna box is adopted. The double coils are composed of an upper coil and a lower coil (a plurality of turns), and the combination mode can be conveniently applied to the double Gray buses. The upper coil and the lower coil respectively correspond to a group of gray buses, one group (for example, the upper bus) of buses is used for working normally, and the other group of gray buses is used for standby. At the moment, the electromotive force induced by the upper antenna coil is unequal to the electromotive force induced by the lower antenna coil, and the signal is normally output. And similarly, when the upper bus fails, the upper bus signal is cut off and the lower bus is put into the lower bus, and the lower coil induces the electromotive force and outputs a signal to complete the switching between the normal gray bus and the failed gray bus. And the adoption of the antenna can also eliminate the environmental stray waves. Assuming that the electromotive force induced by the upper coil is left + right-, then the electromotive force induced by the lower coil is left-right + at the same time, and for the total output, the electromotive forces induced by the upper and lower coils are exactly offset, thus achieving the purpose of anti-interference.

As an improvement of the invention, when the gray bus switching circuit normally uses the 1# gray bus to put into an address decoding system, the ground PLC outputs Q10.0 to control the contactor KM1, the 1# signal generator works after the KM1 is attracted, power signals are provided for the 1# gray bus, and an address coding system is formed by the antenna box coils of the double coils; when the gray bus fails, the Q10.0 is disconnected through plc logic judgment, the Q10.1 is output to control KM2, the KM2 controls a 2# gray bus signal generator to work after being absorbed, a power signal is provided for the 2# gray bus, and an address coding system is formed by the coils of the antenna receiving box with the double coils; similarly, when the 2# gray bus is normally used, if the 2# gray bus fails, the plc performs logic judgment and switches to the gray bus through a switching loop so as to stabilize the normal function of the equipment; when judging the fault of the Gray bus by the Plc, Q10.3S outputs an alarm signal to inform a maintainer of timely eliminating the fault.

A control method for a double gray bus address coding automatic switching device comprises the following steps: when the 1# Gray bus or the 2# Gray bus works, the decoding system communication PLC sends a heartbeat program to the vehicle-mounted PLC, and the vehicle-mounted PLC judges whether the communication of the decoding system PLC is normal or not; if the vehicle mode is judged to be the automatic mode by the vehicle-mounted PLC normally, if the vehicle mode is not the automatic mode, the output communication system is abnormal and is transmitted to the ground PLC, the vehicle is in the automatic mode, the vehicle-mounted PLC receives gray bus data and judges, if the numerical value of the gray bus data is in the vehicle operation range (the 1# gray bus address value range 20.230mm is less than L425.368 mm, and the 2# gray bus address value 20.236mm is less than L425.360 mm), the data acquisition program is continuously executed, if the data exceeds the vehicle operation data range (the 1# gray bus address value is less than L20.230 mm or L >425.368mm and lasts for 2 seconds, and the 2# gray bus address value is L20.236 mm or L >425.360mm and lasts for 2 seconds), the data is judged to be abnormal by the ground PLC, and the gray cable switching is carried out. And meanwhile, judging the cable with abnormal data in use, outputting the abnormal gray bus, and sending alarm information to make statistics on the condition that the maintainer overhauls in time.

Compared with the prior art, the method has the advantages that the method adopting the double Gray buses can automatically judge that the equipment is abnormal and switch to the bus which normally works when the mobile vehicle is abnormal in Gray bus address decoding and alignment (data jumps to 0 and exceeds the normal value of the Gray buses), and simultaneously feeds back and gives an alarm to maintainers, so that the maintainers can find the abnormality and overhaul in time, sufficient time is provided for equipment replacement and maintenance, and the occurrence of furnace shutdown of the mobile vehicle due to the fault of the address Gray buses is avoided.

Drawings

FIG. 1 is a schematic diagram of a Gray bus receiving antenna box;

FIG. 2 is a diagram of a dual address Gray bus structure;

FIG. 3, Gray bus fault switching circuit diagram;

FIG. 4 is a flow chart of Gray bus logic switching;

wherein: 1-1# Gray bus; 2-2# Gray bus; 3-antenna box upper coil; 4-antenna box lower coil; 5-1# termination resistance; 6-2# termination resistance; 7-a communication connection line; 8-a decoder; 10-decoding the communication plc; 11-vehicle plc; 12-a vehicular switch; 13-a vehicle radio station slave station; 14-a vehicle-mounted wireless antenna; 15-a wireless communication ground master station; 16-a wireless communication terrestrial antenna; 17-a ground switch; 18-ground communications plc; 19-Gray bus switching circuit; 20-1# Gray bus signal generator; 21-2# Gray bus signal generator.

The specific implementation mode is as follows:

for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.

Example 1: referring to fig. 1, an automatic switching device for double gray bus address coding comprises a 1# gray bus 1, a 2# gray bus 2, an antenna box upper coil 3, an antenna box lower coil 4, a 1# terminal resistor 5, a 2# terminal resistor 6, a communication connecting line 7, a decoder 8, a decoding communication plc 10, a vehicle-mounted plc11, a vehicle-mounted switch 12, a vehicle-mounted wireless communication radio slave station 13, a vehicle-mounted wireless antenna 14, a wireless communication ground master station 15, a wireless communication ground antenna 16, a ground switch 17, a ground communication plc 18, a gray bus switching circuit 19, a 1# gray bus signal generator 20 and a 2# gray bus signal generator 21; the two-address decoding system comprises a 1# gray bus 1 and a 2# gray bus 2, an antenna box coil 3 receives a 1# gray bus 1 signal, an antenna box coil 4 receives a 2# gray bus 2 signal, the 1# gray bus 1 comprises a 2# gray bus signal generator 21 and a 1# terminal resistor 5 to form a signal sending loop, the 2# gray bus 2 comprises a signal generator 20 and a terminal resistor 6 to form a signal sending loop, a logic switching circuit (switching when the gray bus is switched in) comprises a ground communication PLC 18 and a gray bus switching circuit 19, and the gray bus switching circuit 19 is used for controlling switching between the gray buses when the ground communication PLC 18 judges that the signal fails so as to stably encode the address signal; when gray bus signals are received by the antenna box upper coil 3 and the antenna box lower coil 4 (received by the coil 3 when the gray bus 1 is used, and received by the coil 4 when the gray bus 4 is used), the data is transmitted to the upper part of an address decoder 8 by a communication connection line 7 for decoding, the decoded absolute address is transmitted to a decoding communication plc 10 after the decoding is finished, the decoding communication plc 10 carries out data transmission through a vehicle-mounted switchboard 12 and a vehicle-mounted plc11, the vehicle-mounted plc11 carries out data conversion, the absolute value data decoded by the address is converted into the coke oven number for full-automatic operation control, and the vehicle-mounted plc11 transmits the address decoding data to the wireless communication ground antenna 16 and the wireless ground base station 15 through the vehicle-mounted wireless communication station slave station 13 and the wireless antenna 14, and the address decoding signal and the converted data furnace number are connected to the ground switch 17 through optical fibers to complete the communication with the ground communication plc 18. In the scheme, a double-address coding system consisting of double Gray buses can be mutually standby, when one group of equipment has problems, the other group of equipment can be put into use in time to ensure the smooth operation of full-automatic production, but the auxiliary equipment such as a receiving antenna box, a decoder and a signal generator which are required to be matched when one group of Gray bus cables is put into use are also put into use at the same time, so that the equipment cost is increased, and the purposes of cost reduction and efficiency improvement of enterprises are violated; therefore, the double-address gray bus adopts an up-and-down layout mode in consideration of cost, and a vehicle inspection double-coil antenna box is adopted. The double coils are composed of an upper coil and a lower coil (a plurality of turns), and the combination mode can be conveniently applied to the double Gray buses. The upper coil and the lower coil respectively correspond to a group of gray buses, one group (for example, the upper bus) of buses is used for working normally, and the other group of gray buses is used for standby. At the moment, the electromotive force induced by the upper antenna coil is unequal to the electromotive force induced by the lower antenna coil, and the signal is normally output. And similarly, when the upper bus fails, the upper bus signal is cut off and the lower bus is put into the lower bus, and the lower coil induces the electromotive force and outputs a signal to complete the switching between the normal gray bus and the failed gray bus. And the adoption of the antenna can also eliminate the environmental stray waves. Assuming that the electromotive force induced by the upper coil and the electromotive force induced by the lower coil are left + right-, the electromotive force induced by the lower coil is left-right + at the same time, and the electromotive forces induced by the upper and lower coils are exactly offset for the total output, so as to achieve the purpose of anti-interference, the ground logic judgment circuit 19 of the gray bus switching circuit 19 is shown in the following figure 3, when the 1# gray bus 1 is normally used for inputting an address decoding system, a ground PLC outputs Q10.0 to control a contactor KM1, a 1# signal generator works after KM1 is attracted, a power signal is provided for the 1# gray bus 1, and an address coding system is formed by an antenna box coil (3) with double coils; when the gray bus fails, the Q10.0 is disconnected through plc logic judgment, the Q10.1 is output to control KM2, the KM2 controls a 2# gray bus signal generator to work after being absorbed, a power signal is provided for a 2# gray bus 2, and an address coding system is formed by an antenna receiving box coil 4 with double coils; similarly, when the 2# gray bus 2 is normally used, if the 2# gray bus 2 fails, the plc performs logic judgment and switches to the gray bus 1 through a switching loop so as to stabilize the normal functions of the equipment; when judging the fault of the Gray bus by the Plc, Q10.3S outputs an alarm signal to inform a maintainer of timely eliminating the fault.

A gray cable logic judgment flow chart is shown in a figure 4 below, when a 1# gray bus or a 2# gray bus works, a decoding system communication PLC sends a heartbeat program to a vehicle-mounted PLC, and the vehicle-mounted PLC judges whether the communication of the decoding system PLC is normal or not; if the vehicle mode is judged to be the automatic mode by the vehicle-mounted PLC normally, if the vehicle mode is not the automatic mode, the output communication system is abnormal and is transmitted to the ground PLC, the vehicle is in the automatic mode, the vehicle-mounted PLC receives gray bus data and judges, if the numerical value of the gray bus data is in the vehicle operation range (the 1# gray bus address value range 20.230mm is less than L425.368 mm, and the 2# gray bus address value 20.236mm is less than L425.360 mm), the data acquisition program is continuously executed, if the data exceeds the vehicle operation data range (the 1# gray bus address value is less than L20.230 mm or L >425.368mm and lasts for 2 seconds, and the 2# gray bus address value is L20.236 mm or L >425.360mm and lasts for 2 seconds), the data is judged to be abnormal by the ground PLC, and the gray cable switching is carried out. And meanwhile, judging the cable with abnormal data in use, outputting the abnormal gray bus, and sending alarm information to make statistics on the condition that the maintainer overhauls in time.

The working process is as follows: referring to fig. 1-4, taking an electric locomotive of a coke oven moving vehicle as an example, the original gray bus system structure of the vehicle receives only one gray bus front part installed on an antenna box, and the subsequent systems are a vehicle-mounted decoding device, a vehicle-mounted plc system, a wireless communication system and a ground plc system. When the gray bus fails, the whole system is in failure. In the embodiment, referring to fig. 1 and 2, a gray bus 2# is newly added, the input and the cut-off of the gray bus can be conveniently converted through the double receiving

coils

3 and 4 of the antenna box, a group of auxiliary equipment matched with the gray bus is saved, and the cost input of an enterprise is reduced while the function is realized.

Referring to fig. 3 and 4, in combination with an address coding dual system composed of a dual gray bus and a dual-coil antenna box, through logical judgment of plc, when a vehicle runs fully automatically and normally, only a running operation is performed in a production furnace area of a coke oven, the range of a normal working furnace area of the coke oven is 21.230mm-425.368mm in the feedback of a coding value, data between 1#2# gray buses have partial deviation, but data acquired by the vehicle plc is in the interval. If the data acquisition is outside the range, equipment problems are certain, specifically, the logic judgment of fig. 4 is shown, when a group of gray buses is judged to have faults, the switching between the output gray buses is judged by the ground plc, the switching loop is shown in fig. 3, the 1#2# gray bus switching loop adopts interlocking control, and only one group of buses can work at the same time. The system judges and outputs the alarm to the fault bus after the Gray bus is switched, and prompts relevant maintainers to process the fault bus so as to ensure that the double-bus system can be normally used and stabilize the efficiency of full-automatic operation.

It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.

Claims

1. The automatic switching device for the address coding of the double Gray buses is characterized by comprising a 1# Gray bus (1)

The device comprises a 2# Gray bus (2), an antenna box upper coil (3), an antenna box lower coil (4), a 1# terminal resistor (5), a 2# terminal resistor (6), a communication connecting line (7), a decoder (8), a decoding communication plc (10), a vehicle-mounted plc (11), a vehicle-mounted switch (12), a vehicle-mounted wireless communication radio station slave station (13), a vehicle-mounted wireless antenna (14), a wireless communication ground master station (15), a wireless communication ground antenna (16), a ground switch (17), a ground communication plc (18), a Gray bus switching circuit (19), a 1# Gray bus signal generator (20) and a 2# Gray bus signal generator (21);

the double-address decoding system is characterized in that a 1# Gray bus (1) and a 2# Gray bus (2) form a double-address decoding system, an antenna box coil (3) receives a 1# Gray bus (1) signal, an antenna box coil (4) receives a 2# Gray bus (2) signal, the 1# Gray bus (1) comprises a 2# Gray bus signal generator (21) and a 1# terminal resistor (5) to form a signal sending loop, the 2# Gray bus (2) comprises a signal generator (20) and a terminal resistor (6) to form a signal sending loop, a logic switching circuit (switching when the Gray bus is put in) comprises a ground communication PLC (18) and a Gray bus switching circuit (19), and when the ground communication PLC (18) judges that the signal fails, the switching between the Gray buses is controlled by the bus switching circuit (19) to stabilize the encoded address signal; when the upper coil (3) of the antenna box and the lower coil (4) of the antenna box receive Gray bus signals, the data is transmitted to the upper part of an address decoder (8) by a communication connection line (7) for decoding, the decoded absolute address is transmitted to a decoding communication plc (10) after the decoding is finished, the decoding communication plc (10) carries out data transmission through a vehicle-mounted switchboard (12) and a vehicle-mounted plc (11), the vehicle-mounted plc (11) carries out data conversion, the absolute value data of the address decoding is converted into the coke oven number for full-automatic operation control, and the vehicle-mounted plc (11) transmits the address decoding data to the wireless communication ground antenna (16) and the wireless ground base station (15) through the vehicle-mounted wireless communication station slave station (13) and the wireless antenna (14), and the address decoding signal and the converted data furnace number are connected to a ground switch (17) through optical fibers to complete the communication with the ground communication plc 18.

2. The automatic switching device for double gray bus address coding according to claim 1, wherein when the gray bus switching circuit (19) normally uses the 1# gray bus (1) to switch the address decoding system, the ground PLC output Q10.0 controls the contactor KM1, after the KM1 is closed, the 1# signal generator works to provide power signals for the 1# gray bus (1), and the address coding system is formed by the antenna box coil (3) with double coils; when the gray bus fails, the Q10.0 is disconnected through plc logic judgment, the Q10.1 is output to control KM2, the KM2 controls a 2# gray bus signal generator to work after being absorbed, a power signal is provided for a 2# gray bus 2, and an address coding system is formed by an antenna receiving box coil 4 with double coils; similarly, when the 2# gray bus 2 is normally used, if the 2# gray bus 2 fails, the plc performs logic judgment and switches to the gray bus 1 through a switching loop so as to stabilize the normal functions of the equipment; when judging the fault of the Gray bus by the Plc, Q10.3S outputs an alarm signal to inform a maintainer of timely eliminating the fault.

3. A control method for using the automatic switching device for double gray bus address coding according to claim 1 or 2, characterized in that the method is as follows:

when the 1# Gray bus or the 2# Gray bus works, the decoding system communication PLC sends a heartbeat program to the vehicle-mounted PLC, and the vehicle-mounted PLC judges whether the communication of the decoding system PLC is normal or not; if the vehicle mode is judged to be the automatic mode by the vehicle-mounted PLC normally, if the vehicle mode is not the automatic mode, the output communication system is abnormal and is transmitted to the ground PLC, the vehicle is in the automatic mode, the vehicle-mounted PLC receives gray bus data and judges, if the numerical value of the gray bus data is in the vehicle operation range (the 1# gray bus address value range 20.230mm is less than L425.368 mm, and the 2# gray bus address value 20.236mm is less than L425.360 mm), the data acquisition program is continuously executed, if the data exceeds the vehicle operation data range (the 1# gray bus address value is less than L20.230 mm or L >425.368mm and lasts for 2 seconds, and the 2# gray bus address value is L20.236 mm or L >425.360mm and lasts for 2 seconds), the data is judged to be abnormal by the ground PLC, and the gray cable switching is carried out. And meanwhile, judging the cable with abnormal data in use, outputting the abnormal gray bus, and sending alarm information to make statistics on the condition that the maintainer overhauls in time.