Method for measuring alignment address of coke oven railway vehicle

Abstract

The invention relates to a method for measuring an alignment address of a coke oven railway vehicle, which comprises the following steps of: installing a reading head on the railway vehicle, and arranging a coding plate at a corresponding position of a coke oven beside a rail; the coding plate is provided with a plurality of coding holes, and the reading head is provided with decoding switches in one-to-one correspondence with the coding holes; the reading head is also provided with a left displacement grating ruler and a right displacement grating ruler. According to the method for measuring the alignment address of the coke oven railway vehicle provided by the invention, the oven number data of each coding plate can be reliably read by four carts of the coke oven, and high-speed safe running and low-speed high-precision alignment are carried out; the equipment structure of the address identification system is simplified, and the reliability of the equipment is improved; the address decoding technology can be compatible with an existing coke oven cart coding plate, the coding plate does not need to be installed again, and the repeated investment of equipment is reduced; basic conditions are provided for realizing automatic alignment of the coke oven four-cart system and improving the production efficiency of the coke oven.

Description

Technical Field

[0001] The invention relates to a method for measuring the alignment address of a coke oven rail vehicle, belonging to the technical field of electrical equipment. Background Art

[0002] The rail vehicles for coke ovens, usually called the four-car coke oven cars, are important process equipment in the production of coke ovens. The existing four-car alignment address measurement technology mainly reads the information of the coding plate installed on the ground to identify the position of the furnace number of the carbonization chamber of the coke oven for running and alignment. It mainly includes the coding plate installed on the ground, the reading head and decoding board installed on the car, and the rotary encoder installed on the wheel. The address recognition system of the four-car coke oven car will identify and decode the digital information of the furnace number on the coding plate when passing through the coding plate. The on-board control system matches the furnace number information transmitted by the reading head and decoding board with the absolute value address stored in its own database, and knows the absolute value position of the current vehicle, and then relies on the rotary encoder on the wheel to cooperate for precise alignment and parking. This technology mainly has the following problems:

[0003] 1. The photoelectric switch in the reading head has a complex structure, has strict requirements on the installation position and the position of the encoding plate, and is difficult to maintain.

[0004] 2. The coding plate, reading head, decoding board, rotary encoder and on-board control system need to work together to realize the recognition of the coding plate information. The coke oven trolley travel and positioning involves many devices and has a high failure rate.

[0005] 3. The data on the encoding plate can only be used to identify the furnace position, and it is impossible to measure the continuous absolute value address for accurate alignment.

[0006] 4. The alignment device has a complex structure. Any abnormality in one device will cause signal reading errors, and the encoding board has a high misreading rate. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to overcome the disadvantages of the above-mentioned technology and to provide a method for reading the oven number data in each coding plate of a coke oven rail vehicle with high reliability.

[0008] In order to solve the above technical problems, the technical solution proposed by the present invention is: a method for measuring the alignment address of a coke oven rail vehicle, comprising: installing a reading head on a rail vehicle, and setting a coding plate at a corresponding position beside the coke oven track; when the reading head is aligned with the coding plate, it is judged that the rail vehicle is aligned to the operating position corresponding to the coke oven; a plurality of coding holes are arranged on the coding plate, and the reading head has a decoding switch corresponding to the coding holes one by one; the reading head also has a left displacement grating scale and a right displacement grating scale; when the reading head is aligned with the coding plate, the leading ends of the left displacement grating scale and the right displacement grating scale correspond to the left end and the right end of the coding plate respectively, and the trailing ends of the left displacement grating scale and the right displacement grating scale correspond to the right end and the left end of the coding plate respectively; by shielding different coding holes on the coding plate, the coke oven corresponding to the coding plate can be numbered, and when the reading head is aligned with the coding plate, the decoding switch on the reading head can distinguish whether the coding holes on the coding plate are shielded.

[0009] A further improvement of the above scheme is that: a left edge detection switch and a right edge detection switch are respectively provided on both sides of the reading head; when the reading head is aligned with the encoding plate, the left edge detection switch and the right edge detection switch correspond to the left end and the right end of the encoding plate respectively.

[0010] A further improvement of the above scheme is that: the hole height of the coding hole is greater than or equal to the sum of the diameter of the decoding switch, the maximum upward amplitude of the rail vehicle and the maximum downward amplitude of the rail vehicle; the hole width of the coding hole is greater than or equal to the product of the maximum speed of the rail vehicle and the reading cycle of the decoding switch.

[0011] A further improvement of the above scheme is that each encoding plate contains a specific code, each corresponding to an absolute value address.

[0012] A further improvement of the above scheme is that when the rail vehicle moves toward the target coding plate, the distance is verified by the coding plates it passes by.

[0013] A further improvement of the above scheme is that: the speed of the rail vehicle is adjusted according to the distance between the rail vehicle and the target coding plate, and the closer the distance, the lower the limited speed of the rail vehicle; until it passes the coding plate before the target coding plate; then it slows down and prepares to stop.

[0014] The method for measuring the alignment address of the coke oven rail vehicle provided by the present invention can realize that the four coke oven vehicles can reliably read the oven number data of each coding plate, and perform high-speed safe running and low-speed high-precision alignment; the equipment structure of the address recognition system is simplified, and the reliability of the equipment is improved; the address decoding technology can be compatible with the existing coke oven vehicle coding plate, and there is no need to reinstall the coding plate, thereby reducing repeated equipment investment; and basic conditions are provided for realizing the automatic alignment of the four coke oven vehicle system and improving the coke oven production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the size relationship between the reading head and the encoding plate.

[0018] Figure 3 It is a schematic diagram of rail vehicle speed control. DETAILED DESCRIPTION

[0019] Embodiment: A method for measuring the alignment address of a coke oven rail vehicle in this embodiment includes:

[0020] (1) Design an address recognition system, including a reading head 3 and a coding plate 1, wherein the reading head 3 uses 10 digital photoelectric switches and 2 analog grating rulers in the hardware structure, and its structure is as follows Figure 1 and Figure 2 As shown. Several coding plates 1 are installed and arranged along the running direction of the anxious rail vehicle, and the coding plates 1 correspond to the working positions of the coke ovens one by one; each coding plate 1 is 40CM long, and the furnace number digital information is arranged and encoded through the coding holes on the coding plate 1, using a binary method, and the coding bits contain 8 coding holes from D0 to D7. The reading head 3 determines the high and low states of the signal by blocking the holes on the coding holes, and can be decoded into furnace number information data. The coding holes can also use other coding rules such as 8421 code.

[0021] The reading head 3 is installed on the rail vehicle. As the vehicle moves past each encoding plate 1, the reading head 3 contains 8 photoelectric switches for reading codes. When the reading head 3 passes through the encoding plate 1 and is completely aligned with the encoding plate 1, the photoelectric switch will be aligned with the corresponding encoding hole on the encoding plate 1. If the encoding hole is in a blocked state, the furnace number data decoding switch on the reading head 3 is binary data "0". If the encoding hole is in an open state, the furnace number data decoding switch on the reading head 3 is binary data "1". By analogy, the reading head 3 can obtain binary information from D0 to D7 on the encoding plate 1 respectively. These binary information are connected to the decoding control system of the vehicle. The decoding control system sets an intermediate byte MB0 for receiving, and passes the D0 information to MB0.0, and the D1 information to MB0.1. By analogy, byte MB0 will obtain the binary information contained on the encoding plate 1 and can translate it into decimal furnace number data, thereby realizing direct decoding.

[0022] The reading head 3 is also equipped with a left edge measurement switch 5 and a right edge measurement switch 6, which are also photoelectric switches. The distance between the two switches is consistent with the length of the encoding plate 1 (Lb=40CM). When the reading head 3 has not entered the encoding plate 1, neither the left edge measurement switch 5 nor the right edge measurement switch 6 detects an occlusion signal. When the reading head 3 has just entered the encoding plate 1, at most only one of the left edge measurement switch 5 and the right edge measurement switch 6 detects an occlusion signal. Only when the reading head 3 has completely entered the encoding plate 1 and is aligned with the encoding plate 1, the left edge measurement switch 5 and the right edge measurement switch 6 are both blocked by the edge of the encoding plate 1. The decoding controller uses this as a judgment condition for whether the reading head 3 is aligned with the encoding plate 1 to sample the signals of the furnace number data decoding switches D0 to D7, ensuring reliable reading of the signals of the encoding plate 1.

[0023] Two left displacement detection grating scales 7 and right displacement detection grating scales 8 are also installed on the reading head 3. The left displacement detection grating scale 7 and the right displacement detection grating scale 8 are installed in reverse order and are respectively used to measure the displacement lengths of the left and right parts of the reading head 3 blocked by the encoding plate 1 when the reading head 3 enters the encoding plate 1. The maximum detection displacement of each grating scale is consistent with the length of the encoding plate 1 (Lb=40CM), and the blocked length signal is converted into an analog signal and connected to the decoding controller to calculate the displacement of the reading head 3 entering the encoding plate 1 for low-speed positioning. When the reading head 3 does not enter the encoding plate 1, the left displacement detection grating ruler 7 and the right displacement detection grating ruler 8 of the encoding plate 1 do not detect the blocked displacement signal. When the left displacement detection grating ruler 7 of the reading head 3 just enters the encoding plate 1, the left displacement detection grating ruler 7 of the encoding plate 1 will be blocked from the beginning. When the analog signal is a 4-20MA standard signal, the analog signal sent by the displacement detection grating ruler to the decoding controller will start to rise from 4mA, where the displacement length formula corresponding to the analog milliampere signal I is: Where Lj is the displacement length, converted to

[0024] When the reading head 3 completely enters the encoding plate 1 and is aligned with the encoding plate 1, the analog signal sent to the decoding controller by the left displacement detection grating ruler 7 of the encoding plate 1 will reach 20mA. Since the right displacement detection grating ruler 8 and the left displacement detection grating ruler 7 are installed in an inversely symmetrical manner, the analog signal sent to the decoding controller by the right displacement detection grating ruler 8 will also reach 20mA. At this time, these two signals can be used as redundant signals of the edge measurement switch to confirm that the reading head 3 and the decoding board have been aligned.

[0025] As the reading head 3 continues to move to the left, the length of the head end of the right displacement detection grating ruler 8 blocked becomes shorter and shorter. At this time, the analog signal sent to the decoding controller by the right displacement detection grating ruler 8 also drops from 20mA to 4mA, and the displacement length formula corresponding to the analog milliampere signal is still:

[0026] In order to reliably read the furnace number data information on the coding plate 1 and avoid the problem of data reading errors caused by vibration common in other coding plate 1 decoding technologies, the size of the coding hole determines the reliability of data reading. According to the running state of the coke oven vehicle, it is necessary to calculate the size of the coding hole on it to meet the data reading requirements when the vehicle speed is the highest and the vibration is the largest. Suppose the diameter of the detection light emitted by the decoding switch is R = 3mm, the highest upward amplitude in the vertical direction when the coke oven vehicle is running at high speed is Du = 20mm, and the highest downward amplitude is Dd = 15mm, then it is necessary to ensure that the opening height D in the vertical direction of each data bit is greater than or equal to R + Du + Dd = 38mm, and the width of the coding hole is L, and the maximum speed of the vehicle is Vmax = 2M / S, then the shortest time for the decoding switch to pass through a coding hole is Tmin = L / Vmax, and the decoding controller reads the digital quantity The cycle time is Tr = 0.01S, in order to ensure reliable data reading, it is necessary to ensure that Tmind ≥ Tr, then the narrowest opening width of the coding hole can be calculated L> Tr*Vmax = 2M / S*0.01S = 20mm.

[0027] In order to achieve rapid and accurate positioning of the vehicle and prevent the vehicle from running beyond the target code plate 1 area due to excessive speed, the present embodiment also provides a control mode of a high-speed running area and a low-speed positioning area to achieve accurate alignment of the rail vehicle in the coke oven carbonization chamber, such as Figure 3As shown. Each code plate 1 corresponds to a fixed absolute value address. When the distance between the carbonization chambers of the coke oven is 1.5 meters, when the reading head 3 is centered on the code plate 1 with the coding information of 00000001, the decoding controller can retrieve the corresponding absolute value address stored in the database as 100 meters. When the code plate with the coding information of 00000010 is centered, the decoding controller can retrieve the corresponding absolute value address stored in the database as 101.5 meters, and so on. As long as the vehicle and the code plate are well aligned, the absolute value address position of the furnace area where the vehicle is located can be known by decoding it. Due to the characteristics of the fixed-point work of the coke oven vehicle, as long as the alignment target code plate is known and its absolute value address is confirmed to be Ln=200M, combined with the absolute value address Lm=130M of the current code plate, it can be known that the displacement to be completed is Ln-Lm=200M-130M=70M. If the value is positive, it means to move in the positive direction, and if the value is negative, it means to move in the reverse direction. Due to the large displacement, high-speed travel can be used to quickly reach the target position.

[0028] In order to achieve rapid positioning, the area S between the two coding plates can be set as a high-speed running area, that is, S = Ln-Lm-Lb = 200M-130M-0.4M = 69.6M. Every time a coding plate is passed, the decoding controller calls the absolute value address corresponding to the coding plate once, calculates the remaining high-speed area displacement for high-speed dynamic speed regulation, and the speed setting value changes from 100% to 30%. The smaller the absolute value of the displacement, the lower the high-speed given speed. When the vehicle reaches the coding plate before the target coding plate, the last position check of the high-speed area is performed, and the remaining displacement of the high-speed area becomes S1 = Ln-L(n-1)-Lb = 200M-198.5M-0.4M = 1.1M. At this time, the vehicle starts to decelerate to less than 15% to prepare for precise positioning. Therefore, a constant given speed of 10% can be used to quickly complete the running of the remaining high-speed area and enter the low-speed positioning area.

[0029] As soon as the vehicle enters the target code plate, the left edge measurement switch 5 of the code plate on the reading head 3 is blocked and triggered, and the left displacement detection grating ruler 7 of the code plate is blocked to generate analog value changes. The decoding controller determines that the vehicle has entered the low-speed positioning area by detecting these signals, and starts to further decelerate and start the precise alignment process. At this time, the left displacement detection grating ruler 7 of the code plate measures the displacement Lj of the reading head 3 blocked by the target code plate, and calculates the remaining displacement as Lb-Lj=40CM-Lj. Under the control of the high-precision transmission system, the low-speed speed value can be dynamically adjusted, and the speed setting value changes between 10% and 1%. The smaller the remaining displacement, the slower the given control speed. When the displacement remaining amount becomes zero, the given control speed will also become zero. At this time, the left edge measurement switch 5 and the right edge measurement switch 6 of the code plate on the reading head 3 are blocked and triggered again at the same time, and the furnace number data decoding switch on the reading head 3 reads the coding information on the target code plate to confirm that the target furnace number position has been reached.

[0030] When the vehicle needs to move in reverse to the working position, the speed control principle is the same as that for forward movement.

[0031] The present invention is not limited to the above embodiments. Any technical solution formed by equivalent replacement falls within the protection scope required by the present invention.

Claims

1. A method for measuring the alignment address of a coke oven rail vehicle, characterized in that: A reading head is installed on a rail vehicle, and a coding plate is set at a corresponding position beside the coke oven track; when the reading head is aligned with the coding plate, it is determined that the rail vehicle is aligned to the operating position corresponding to the coke oven; a number of coding holes are set on the coding plate, and the reading head has a decoding switch corresponding to the coding holes one by one; the reading head also has a left displacement grating scale and a right displacement grating scale; when the reading head is aligned with the coding plate, the leading ends of the left displacement grating scale and the right displacement grating scale correspond to the left end and the right end of the coding plate respectively, and the trailing ends of the left displacement grating scale and the right displacement grating scale correspond to the right end and the left end of the coding plate respectively; by shielding different coding holes on the coding plate, the coke oven corresponding to the coding plate can be numbered, and when the reading head is aligned with the coding plate, the decoding switch on the reading head can distinguish whether the coding holes on the coding plate are shielded.

2. The method for measuring the alignment address of a coke oven rail vehicle according to claim 1, characterized in that: The two sides of the reading head are respectively provided with a left edge detection switch and a right edge detection switch; when the reading head is aligned with the encoding plate, the left edge detection switch and the right edge detection switch correspond to the left end and the right end of the encoding plate respectively.

3. The method for measuring the alignment address of a coke oven rail vehicle according to claim 1, characterized in that: The hole height of the coding hole is greater than or equal to the sum of the diameter of the decoding switch, the maximum upward amplitude of the rail vehicle, and the maximum downward amplitude of the rail vehicle; the hole width of the coding hole is greater than or equal to the product of the maximum speed of the rail vehicle and the reading cycle of the decoding switch.

4. The method for measuring the alignment address of a coke oven rail vehicle according to claim 1, characterized in that: Each encoding board contains a specific code, which corresponds to an absolute value address.

5. The method for measuring the alignment address of a coke oven rail vehicle according to claim 4, characterized in that: When the rail vehicle moves toward the target coding plate, the distance is verified by the coding plates passed by.

6. The method for measuring the alignment address of a coke oven rail vehicle according to claim 4, characterized in that: The speed of the rail vehicle is adjusted according to the distance between the rail vehicle and the target code plate. The closer the distance is, the lower the limited speed of the rail vehicle is; until it passes the code plate before the target code plate; then it slows down and prepares to stop.

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