A coke oven locomotive accurate positioning system and positioning method

Abstract

The present application belongs to the field of coking production, and solves the problem of accurate alignment of coke oven car and oven mouth. The present application relates to a coke oven car accurate positioning system and positioning method. The system comprises a moving main body connected with a coke oven car to be positioned. The moving main body comprises a top plate with a bottom plate assembly at its lower end. A connecting plate is fixed to the middle of the rail away from the coke oven at the lower end of the bottom plate assembly. A main support plate is arranged below the connecting plate. The main support plate and the connecting plate are connected through a plurality of positive pressure mechanisms. Two measuring rolling wheels are installed below the main support plate, which are in contact with the rail and coaxially arranged with measuring encoders. Four dust sweeping assemblies are installed below the bottom plate assembly. An inductor is installed at the starting point and the terminal point of the moving main body. An inductive sensor is installed near each end of the main support plate. A Hall module is installed on the main support plate. Eight magnetic block columns are arranged near each coke oven door. The system further comprises a single-chip microcomputer, a digital display instrument and an upper computer management system. The present application improves the alignment accuracy of the oven door.

Description

Technical Field

[0001] This invention relates to the field of coking production, specifically to a coke oven locomotive positioning system and positioning method. Background Technology

[0002] Modern coking typically takes place in the coking workshop of a coking plant. A coking workshop generally consists of one or more coke ovens and their auxiliary facilities. Each coke oven group contains multiple chambers, all located on a straight line. The coke pusher, coal charging car, coke quencher, and coke quenching cars on both sides of the coke oven repeatedly run along a long track. According to the coke discharge schedule and the oven number, the coke pusher removes the oven door and uses the pusher plate to push out the coke that has been refined in the carbonization chamber. The coal charging car is responsible for reloading coal into the carbonization chamber. The coke quencher removes the corresponding oven door on the other side and discharges the coke to the coke quenching car. Finally, the coke quenching car receives the coke and transports it to the quenching platform. Each time the locomotive operates on the coke oven, it must be aligned with the center line of the oven opening to ensure smooth subsequent operations.

[0003] Generally, the highest combustion temperature inside the carbonization chamber can reach 1350℃, and the lowest temperature is 950℃. When the furnace door is opened, due to the high internal temperature and combustion impurities, a large amount of flue gas and dust is generated, severely obstructing the operator's view. Combined with the vibration of the locomotive itself, this makes it increasingly difficult to align the coke pusher, coke catcher, and coke quencher with the center of the furnace door in this complex working environment. For a long time, relying on manual visual alignment has resulted in poor consistency and made it difficult to quickly and effectively control the stopping position within a safe range. Dangerous situations such as "red coke falling to the ground" caused by insufficient alignment accuracy of the coke oven locomotive have occurred both domestically and internationally. These dangerous situations not only cause financial losses to the factory but also endanger personal safety. The positioning accuracy of the coke oven locomotive is directly related to the safety of coking production.

[0004] Currently, there are several common technologies for coke oven car positioning: 1) Rotary encoder technology, which uses rotary encoders installed directly on the wheels of the coke oven car for positioning. However, due to the large weight and wheel diameter of the coke oven car, wheel slippage often occurs during operation, making it difficult to guarantee accuracy over long periods of operation; 2) Infrared light sensing technology, which uses infrared light to achieve non-contact ranging and positioning. However, it is susceptible to interference from dust and high ambient temperatures, resulting in insufficient positioning stability; 3) Encoded cable positioning technology, which has the advantage of high accuracy, but is technically complex, expensive, and the encoded cable has a short lifespan at high temperatures; 4) Radio phase detection positioning technology, which has lower accuracy compared to the previous technologies. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a coke oven locomotive precision positioning system and method that can overcome the influence of adverse environments on system positioning, accurately reflect the real-time position of the locomotive during its movement, improve the alignment accuracy and reliability between the locomotive and the oven opening, and simultaneously address issues such as cost, ease of use, and durability, thereby saving labor costs and improving work efficiency.

[0006] One of the above-mentioned objectives of the present invention is achieved through the following technical solution:

[0007] A precise positioning system for coke oven locomotives, characterized in that: it includes a moving body, which is connected to the coke oven locomotive to be positioned and is synchronously driven by the coke oven locomotive to be positioned; the moving body includes a top plate; and a bottom plate assembly is installed at the lower end of the top plate;

[0008] A connecting plate is fixed in the middle of the rail on the side away from the coke oven area below the base plate assembly. A main support plate is set directly below the connecting plate. The main support plate and the connecting plate are connected by multiple sets of positive pressure mechanisms. Measuring rollers are installed at the front and rear ends along the rail direction below the main support plate through two bearing seats and a rotating shaft, respectively. The measuring rollers are in contact with the rail on that side. A measuring encoder is coaxially fixed on each of the front and rear rotating shafts. The static grid connectors of the two measuring encoders are fixedly installed above the corresponding ends of the main support plate. A set of dust sweeping components for cleaning the rail surface is fixedly installed on each side below the base plate assembly near the front and rear ends.

[0009] A sensor is installed at the starting and ending points of the moving body; a sensor is installed on each end of the main support plate.

[0010] A Hall module is installed on the main support plate. Corresponding to the Hall module, eight columns of magnetic blocks are arranged near each coke oven door. Each column of eight magnetic blocks corresponds to a door address code. The Hall module is used to identify the oven number and determine the magnetic center as the alignment starting point when passing directly above the column of magnetic blocks. At the same time, it generates a zero-position signal to clear the system measurement data and start counting.

[0011] It also includes a microcontroller, a digital display, and a host computer management system; the microcontroller is installed above the top plate to communicate with the host computer and process encoder measurement signals and Hall element identification information; the digital display is installed above the top plate to display the motion status of the equipment; the host computer management system is located in the locomotive cab to facilitate user control of the system and display of coke oven locomotive motion information.

[0012] Moreover, the positive pressure mechanism is an elastic mechanical structure that can be adjusted vertically, including a combination structure of an upper guide cylinder and a lower guide cylinder, with a compression spring installed between the two guide cylinders; the upper end of the upper guide cylinder is vertically fixedly connected to the connecting plate, and the lower end of the lower guide cylinder is vertically fixedly connected to the main support plate, with the lower end of the upper guide cylinder and the upper end of the lower guide cylinder forming an insert-type linear guide fit.

[0013] Furthermore, the sweeping assembly includes a motor base, a motor, and a dust brush; the motor base is fixed below the base plate assembly, the motor is fixed to the lower end of the motor base with the output shaft facing the direction, and the dust brush is mounted on the output shaft of the motor. The dust brush is a disc brush and contacts the track surface.

[0014] Furthermore, the measuring encoder operates in a temperature range of -40℃ to +85℃ and has an impact resistance of 490m / s. 2 Vibration resistance is 50m / s. 2 The angular displacement measurement accuracy of the encoder is ±0.03°, and the angular resolution is 0.01°; the linear displacement resolution of the digital display is 0.02mm; the measuring roller is made of high carbon steel through quenching and precision machining; the bearing, shaft, and bearing housing are all made of special stainless steel.

[0015] The second objective of this invention is achieved through the following technical solution:

[0016] A method for precise positioning of coke oven locomotives, based on the aforementioned precise positioning of coke oven locomotives, includes the following steps:

[0017] Step 1: Preparations before the positioning operation, including:

[0018] 1.1. Install sensors at the starting and ending points of the locomotive's movement to determine the working area for alignment;

[0019] 1.2. Eight rows of magnetic blocks are arranged on both sides of the track corresponding to each coke oven door. Each row of eight magnetic blocks corresponds to a door address code, which can identify the oven number.

[0020] 1.3 The displacement of the calibration equipment as it travels from the longitudinal column of each magnetic block to the center of the furnace door is taken as a known quantity of the system and stored in the host computer software;

[0021] Step 2: Perform positioning operation

[0022] 2.1. Start the coke oven locomotive precision positioning system to drive the locomotive from the starting position to the working area. When the induction sensor passes directly above the induction body, a start measurement command signal is generated, and the digital display is cleared to zero.

[0023] 2.2. Set the furnace number for the upcoming coke pushing task in the microcontroller via the host computer and write it to the storage.

[0024] 2.3 When the Hall module in the device passes directly above the column of target magnetic blocks, the identification address information is consistent with the stored information, and a command signal is generated to clear the system measurement data and re-record. After the data is cleared, the digital display will display the displacement of the car body relative to the magnetic center in real time. The data will also be transmitted to the host computer and compared with the pre-calibrated distance between the magnetic center and the center of the furnace door to obtain the accurate stopping distance of the coke oven locomotive relative to the center of the furnace door.

[0025] 2.4 The host computer software displays the returned displacement information in real time, guiding the user to adjust the coke oven locomotive forward and backward until the displacement of the locomotive relative to the magnetic induction center reaches the pre-calibrated distance between the magnetic induction center and the center of the oven door, thus achieving precise positioning control of the coke oven locomotive.

[0026] Furthermore, in step 1.3, the displacement of each group of magnetic blocks after being calibrated to the center of the furnace door is calibrated in both the forward and reverse directions.

[0027] The forward calibration method is as follows:

[0028] The locomotive starts from the starting point and travels forward, beginning at furnace door No. 1. It first identifies the magnetic block array numbered C0, resets the digital display module to zero, and records the angle encoder data for displacement conversion. The locomotive continues to furnace opening L1, then performs multiple fine adjustments to precisely align the coke pusher plate with the furnace opening. After confirming alignment, it records the output displacement, x1, and then continues to the next adjacent furnace door. This process continues sequentially until the nth furnace door at the end of the coke oven. Each time, the locomotive stops precisely at the center of the furnace door, obtaining the center position of each furnace door relative to the magnetic block on its left, denoted as x1, x3, x5, ... x (2n-1) The value;

[0029] The reverse calibration method is as follows:

[0030] The locomotive departs from the terminal and travels in reverse, starting from furnace door n. It first identifies C. n+1 The magnetic block array records x2, x4, x6, ... x as the locomotive runs. (2n) The values ​​are the correction amounts of the center position of each furnace door relative to the magnetic block on its right.

[0031] The advantages and positive effects of this invention are as follows:

[0032] (1) The coke oven locomotive positioning device of the present invention is designed to operate on the rails far from the oven opening. The relative mileage of the encoder is used as the alignment basis, which can effectively overcome the positioning obstacles caused by high temperature and high dust concentration in the coking workshop. The independent measuring roller combined with the dust removal brush can effectively avoid the influence of wheel slippage on the positioning result, making the positioning more reliable.

[0033] (2) The coke oven locomotive positioning system of the present invention uses magnetic blocks to identify the furnace number in the longitudinal column and uses it as the relative positioning starting point. By reducing the working area, the working range of the encoder is reduced, limiting its linear error as the running distance increases, improving the furnace door alignment accuracy, and achieving millimeter-level accuracy.

[0034] (3) The present invention has independently designed a positioning device that can be adapted to various types of coke pushers, coke catchers, coke quenchers, and smoke guides without changing the locomotive’s own structure. It is simple to install and flexible to deploy. Attached Figure Description

[0035] Figure 1 This is a front sectional view of the present invention;

[0036] Figure 2 This is a top view of a partial structural diagram of the present invention;

[0037] Figure 3 This is a structural diagram of the coke oven locomotive precision positioning system of the present invention;

[0038] Figure 4 This is a calibration schematic diagram of the coke oven locomotive precision positioning system of the present invention;

[0039] Figure 5 This is a schematic cross-sectional view of the software for the precise positioning system of coke oven locomotives of the present invention.

[0040] Specific implementation methods

[0041] The structure of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0042] A precise positioning system for coke oven locomotives, please see [link / reference]. Figures 1-5 The invention comprises a moving body connected to and synchronously driven by a coke oven locomotive to be positioned. The moving body is a mobile measuring vehicle that runs on railway tracks. The moving body includes a rectangular top plate 1, with a bottom plate assembly 2 installed at its lower end. The position of the bottom plate assembly can be adjusted bidirectionally along the X (horizontal) and Y (perpendicular to the track). For example, the bottom plate assembly can consist of two layers: an upper plate and a lower support plate at the top plate, with a linear guide mechanism and a screw-nut drive mechanism along the X-axis; and a linear guide mechanism and a screw-nut drive mechanism along the Y-axis.

[0043] A connecting plate 3 is fixed at the center of the rail 7 on the side away from the coke oven area below the base plate assembly. A main support plate 8 is positioned directly below and opposite the connecting plate. The main support plate and the connecting plate are connected by multiple sets of positive pressure mechanisms 11. A set of bearing seats 9 are installed at both ends along the track direction below the main support plate. A rotating shaft 16 is rotatably mounted on the bearing seats via bearings 15. A measuring roller 10 is fixedly mounted on the rotating shaft, and the measuring roller contacts the track on that side. The aforementioned multiple sets of positive pressure mechanisms and the two measuring rollers are located on the same centerline. The positive pressure mechanism is an elastic mechanical device that generates a downward elastic force to keep the measuring roller in contact with the track surface, ensuring straightness of operation and preventing slippage. The positive pressure mechanism can adopt a combination structure of an upper guide cylinder and a lower guide cylinder with a spring installed between the two guide cylinders.

[0044] A measuring encoder 17 is coaxially fixedly installed on each of the front and rear rotating shafts, and the stationary grid (stator) connectors 12 of the two measuring encoders are respectively fixedly installed on the upper end of the main support plate at the corresponding end.

[0045] A set of dust-sweeping components is fixedly installed on each side, near the front and rear ends, below the base plate assembly. Two sets of dust-sweeping components operate on the rails closer to the coke oven area, while the other two sets operate on the rails farther from the coke oven area, located outside the front and rear measuring rollers. The dust-sweeping components mainly consist of a motor mount 4, a motor 5, and dust-sweeping brushes 6. The motor mount is fixed below the base plate assembly, and the motor is fixed to the lower end of the motor mount with its output shaft facing upwards. The dust-sweeping brushes are mounted on the output shaft of the motor and are disc brushes that contact the rail surface to remove dust and debris. The dust-sweeping components rotate synchronously with the vehicle body, clearing debris and dust from the two rails as the main moving body advances, thus avoiding interference with the measurement encoder.

[0046] A sensor 13 is installed near each end of the main support plate, and a sensor is installed at the starting and ending points of the moving body, respectively, corresponding to the two sensors.

[0047] A Hall module 14 is also installed on the main support plate. Eight magnetic blocks are arranged in columns near each coke oven door for the Hall module. The magnetic blocks contain the oven door address code. When the Hall module passes directly above the column of magnetic blocks, it identifies the oven number and determines the magnetic center as the alignment starting point. At the same time, it generates a zero-position signal to clear the system measurement data and start counting again.

[0048] It also includes a microcontroller (MCU), a digital display, and a host computer management system, which are not shown in the attached diagram. The MCU is mounted on the top panel and communicates with the host computer, processing encoder measurement signals and Hall element identification information. The digital display is also mounted on the top panel and displays the equipment's motion status. The host computer management system is located in the locomotive cab, facilitating user control of the system and display of the coke oven locomotive's motion information. The aforementioned measuring encoders are special rotary encoders with an operating temperature range of -40℃ to +85℃, capable of resisting severe dust and water mist, and withstanding impacts of up to 490 m / s. 2 Vibration resistance 50m / s 2 The aforementioned measuring rollers are preferably made of high-carbon steel through quenching and precision machining, making them wear-resistant and durable. Bearings, shafts, bearing housings, and other related components are preferably made of special stainless steel for corrosion and rust prevention.

[0049] In this invention, the encoder has an angular displacement measurement accuracy of ±0.03° and an angular resolution of 0.01°. The diameter of the measuring roller is 208mm, the digital display has a linear displacement resolution of 0.02mm, the circumference of the measuring roller is 655mm, and the linear displacement measurement accuracy is ±0.04mm / cycle. If the measurement length is 10M, the measurement error is ±0.6mm. Considering the existence of other errors, the maximum measurement error of 10M after amplifying the measurement error by 3 times is ±1.8mm, which is sufficient to meet the requirements for the alignment of general coke oven doors.

[0050] The positioning implementation method based on this coke oven locomotive precision positioning system is as follows:

[0051] Step 1: Preparations before the positioning operation, including:

[0052] 1. First, sensors are placed at the starting and ending points of the locomotive's movement to determine the working area of ​​the entire system. The system only performs alignment and positioning work within the limited area.

[0053] 2. Secondly, eight rows of magnetic blocks are pre-arranged on both sides of the track corresponding to each coke oven door. Each row of eight magnetic blocks corresponds to the address information of one oven door, which can identify the oven number.

[0054] 3. Finally, the displacement of the equipment as it travels through each column of magnetic blocks to the center of the furnace door needs to be calibrated as a known quantity of the system and stored in the host computer software.

[0055] Step 2: Perform positioning operation

[0056] After the coke oven locomotive precision positioning system is activated, the locomotive moves from its starting position to the working area. As the vehicle moves, the measuring rollers drive the angle encoder to rotate coaxially and synchronously. When the induction sensor passes directly above the sensing element, a start measurement command signal is immediately generated, and the digital display is zeroed. The user sets the furnace number for the upcoming coke pushing task in the MCU via the host computer and writes it into storage. When the Hall module in the equipment passes directly above the target magnetic block column, the address information matches the stored information, generating a command signal to zero the system measurement data and re-record. At this time, the digital display records the displacement of the equipment relative to the magnetic center and transmits it to the host computer. This displacement is compared with the pre-calibrated distance between the magnetic center and the furnace door center to determine the precise stopping distance of the coke oven locomotive relative to the furnace door center. The host computer software provides real-time visualization based on the returned displacement information, guiding the user to make adjustments and eliminating the tedious process of manually aligning the furnace opening. After completing the work, the locomotive continues to the next furnace chamber, and the positioning steps are the same as before. Example

[0057] Before the coke oven precision positioning system is officially put into operation, magnetic blocks are first embedded in rows along both sides of rail B of the locomotive running track. The specific placement locations are shown in the attached figure. Figure 4 As shown, where C0 to C n+1 This represents all the magnetic blocks arranged along the n furnace doors. Each magnetic block has a pre-set address code corresponding to the current furnace door. This address code is unique. Typically, there is a furnace door between two columns of magnetic blocks. Sensors are placed at the start and end points of the track to send limit signals to the system.

[0058] Then, the coke oven group is calibrated according to the actual conditions on site. Calibration is a prerequisite for subsequent mileage-based positioning. The specific steps are as follows: After starting the positioning equipment, the locomotive departs from the starting point and travels in the forward direction, as shown in the attached diagram. Figure 4 As shown, starting from furnace door No. 1, the equipment first identifies the magnetic block array numbered C0. The digital display module is zeroed and the angle encoder data is recorded for displacement conversion. The locomotive continues to the furnace opening L1, and then performs multiple fine adjustments to precisely align the coke pusher plate with the furnace opening. After confirming alignment, the output displacement, i.e., the value of x1, is recorded, and then the locomotive continues to the next adjacent furnace door. This process continues until the nth furnace door at the end of the coke oven. Each time, the locomotive stops at the exact center of the furnace door, obtaining the center position of each furnace door relative to the magnetic block on its left, denoted as x1, x3, x5, ... x (2n-1 The value of ) indicates that after reaching the end, the vehicle reverses direction, and C is identified first. n+1 Magnetic block array, recording x2, x4, x6, ... x (2n)The value is the correction amount of the center position of each furnace door relative to the magnetic block on its right. The above values ​​can be used continuously as long as the track does not change. If the track changes or the furnace structure is readjusted, the above steps should be repeated for calibration.

[0059] After the coke oven precision positioning system is officially operational, the locomotive begins its coke pushing task along the track. Taking the operation from furnace door 1 to furnace door 2 as an example, when the locomotive travels forward, firstly, the furnace number input module in the host computer software sets the furnace number 2 to be reached in the MCU. After passing above the longitudinal column of magnetic blocks at the furnace opening, the address information is identified by the Hall module and input to the MCU. When the C1 marker position is detected, the information match is successful, triggering the zero-position signal and clearing the internal mileage data. Based on the measurement signal output by the angle rotary encoder, after linear displacement conversion, the actual mileage relative to the magnetic induction center is calculated and transmitted to the host computer via RS232 serial port (see attached). Figure 5 As shown. The remaining distance d3 is calculated as the difference between the calibrated distance x3 and the latest accumulated distance s3 of the encoder at this time. If d3 is positive, the locomotive adjusts in the positive direction; if d3 is negative, the locomotive adjusts in the negative direction. When the absolute value of d3 is less than the threshold, it is considered fully aligned. When the locomotive travels in the negative direction, such as from furnace door 2 to furnace door 1, it must identify the position of the C1 marker to trigger the zero-position signal, clear the internal mileage data, and calculate the remaining distance d2 as the difference between the calibrated distance x2 (negative value) and the latest accumulated distance s2 (negative value) of the encoder at this time. The adjustment method is the same as in the positive direction. During the precision alignment process, the host computer displays the remaining mileage information and determines the adjustment amount for coke oven alignment, with an accuracy in the millimeter to sub-millimeter range.

[0060] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A coke oven machine precise positioning system, characterized in that: The motion body is connected with and driven by the coke oven locomotive to be positioned, and includes a top plate and a bottom plate assembly installed at the lower end of the top plate; A connecting plate is fixed at the middle position of the track away from the coke oven area, a main support plate is arranged opposite to the connecting plate, the main support plate and the connecting plate are connected through a plurality of positive pressure mechanisms, and a measuring rolling wheel is installed at the front and rear ends of the main support plate through two bearing seats and rotating shafts in the track direction, the measuring rolling wheel is in contact with the track, and a measuring encoder is coaxially fixed on each of the front and rear rotating shafts, and the static grids of the two measuring encoders are fixed on the main support plate above the corresponding ends; A sensing body is installed at the starting point and the ending point of the motion body, and a sensing sensor is installed on the main support plate near the two ends; A Hall module is installed on the main support plate, and eight magnetic block columns are arranged near each coke oven door, and each eight magnetic block columns correspond to an oven door address code; The Hall module is used for identifying the oven number when passing above the magnetic block column, determining the magnetic sensing center as the alignment starting point, and generating a zero signal for system measurement data zero reset and recalculation; The system further comprises a single-chip microcomputer, a digital display instrument and an upper computer management system; The single-chip microcomputer is installed above the top plate, communicates with the upper computer, and processes the encoder measurement signal and the Hall element identification information; The digital display instrument is installed above the top plate and is used for displaying the motion state of the device, and the upper computer management system is arranged in the locomotive cab to facilitate user control of the system and display of the coke oven locomotive motion information.

2. The precise positioning system for coke oven vehicles according to claim 1, characterized in that: The bottom plate assembly is fixed below the top plate in a bidirectional adjustment mode along the X-axis direction and the Y-axis direction.

3. The precise positioning system for coke oven vehicles according to claim 1, characterized in that: The positive pressure mechanism is an elastic mechanical structure capable of self-adjusting upward and downward displacement, comprising an upper guide cylinder and a lower guide cylinder, and a compression spring is installed between the two guide cylinders; the upper end of the upper guide cylinder is fixedly connected with the connecting plate in a vertical manner, the lower end of the lower guide cylinder is fixedly connected with the main support plate in a vertical manner, and the lower end of the upper guide cylinder is in a plug-in linear guide cooperation with the upper end of the lower guide cylinder.

4. The coke oven push car precision positioning system of claim 1, wherein: The dust sweeping assembly comprises a motor seat, a motor and a dust sweeping brush; the motor seat is fixed below the bottom plate assembly, the motor is fixed to the lower end of the motor seat in a downward output shaft manner; the dust sweeping brush is installed on the output shaft of the motor, the dust sweeping brush adopts a disc brush, and the dust sweeping brush is in contact with the track surface.

5. The coke oven push car precision positioning system of claim 1 wherein: The working temperature range of the measuring encoder is between -40 DEG C and +85 DEG C, the impact resistance is 490 , the anti-vibration is 50 , the angular displacement measurement accuracy of the measuring encoder is ±0.03 DEG, the angular resolution is 0.01 DEG; the linear displacement resolution of the digital display instrument is 0.02 mm; the measuring rolling wheel is made of high-carbon steel quenching and finishing; the bearing, the rotating shaft and the bearing seat are made of special stainless steel.

6. A method of positioning based on the coke oven vehicle positioning system according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: Step 1, preparation work before positioning operation, comprising: 1.1, arranging sensing bodies at the starting point and the ending point of the locomotive motion to determine the alignment work area; 1.2, arranging eight magnetic block columns on both sides of the corresponding track of each coke oven door, and each eight magnetic block columns correspond to an oven door address code to identify the oven number; 1.3, calibrating the displacement of the device passing through the center of the oven door after passing through each group of magnetic block columns as a known quantity of the system, and storing in the upper computer software; Step 2, positioning operation 2.1, start the coke oven machine accurate positioning system, make the machine from the starting position to the working area, when the inductive sensor drives through the inductive body directly above, generate the start measurement instruction signal, the digital display instrument clears zero; 2.2, through the host computer in the single-chip microcomputer to set the furnace number of the task of pushing the coke and write into the storage; 2.3, when the Hall module in the device passes through the target magnetic block column directly above, identify the address information consistent with the storage information, generate the system measurement data zero and re-record the instruction signal, after the data zero, the digital display instrument will display the displacement of the vehicle body relative to the magnetic center driving through in real time, the data will be transmitted to the host computer at the same time, compared with the pre-calibrated distance between the magnetic induction center and the furnace door center, the accurate parking distance of the coke oven machine relative to the furnace door center is obtained; 2.4, the host computer software displays the displacement information in real time, guides the user to adjust the coke oven machine forward and backward until the displacement of the vehicle body relative to the magnetic center driving through reaches the pre-calibrated distance between the magnetic induction center and the furnace door center, realizes the accurate positioning control of the coke oven machine.

7. The method of positioning according to claim 6, based on the precise positioning system of coke oven vehicles according to any one of claims 1 to 5, characterized in that: In step 1.3, the displacement of each group of magnetic block column after calibration to the center of the furnace door is calibrated by forward and reverse calibration; The forward calibration method is: The locomotive starts from the starting point and drives forward, and from the No. 1 furnace door, it first identifies the magnetic block array numbered , the digital display module is cleared and records the angle encoder data for displacement conversion, the locomotive continues to drive to the furnace mouth , and then performs multiple repeated fine adjustments to accurately align the pusher plate with the furnace mouth; after determining the alignment, the value of the output displacement at this time, i.e. , is recorded, and then the next adjacent furnace door is continued to drive; the sequence is performed until the last of the coke oven, and each time the locomotive is stopped at the center of the furnace door to obtain the center position of each furnace door relative to the left magnetic block correction amount, denoted as , , ,… ​ The reverse calibration method is: The locomotive departs from the terminal and travels in reverse from The first identification is made at the start of the magnetic block array, as the locomotive travels, records , , ,… the values of the respective furnace door center positions relative to the right side magnetic block correction.

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