A deviation correction device and deviation correction method for a truss type gantry crane

Abstract

The present invention discloses a deviation correction device for a truss-type gantry crane, comprising a travel track, a gantry crane trolley, a position code and a controller, wherein the travel track comprises a first track and a second track which are parallel and spaced apart; the gantry crane trolley comprises a first travel mechanism matched with the first track, a first power source for driving the first travel mechanism, a second travel mechanism matched with the second track, and a second power source for driving the second travel mechanism, the first travel mechanism is provided with a first encoder and a first code scanner, and the second travel mechanism is provided with a second encoder and a second code scanner; the position code is fixedly arranged relative to the travel track, the position code comprises a first position code and a second position code which are parallel and spaced apart, the first code scanner scans and identifies the first position code to determine the position of the first travel mechanism, and the second code scanner scans and identifies the second position code to determine the position of the second travel mechanism, and the operation deviation of the gantry legs on both sides can be detected, verified and corrected to avoid damage to the wheels or rails.

Description

Technical Field

[0001] The invention relates to the technical field of deviation correction of a truss type gantry crane, and in particular to a deviation correction device and a deviation correction method for a truss type gantry crane. Background Art

[0002] Large-span truss gantry cranes are important equipment in the production and transportation of construction, factories, ports and terminals. In recent years, with the improvement of the automation level of logistics and transportation operations, large-span truss gantry cranes have been widely upgraded and renovated for automation. Due to the structural rigidity of large-span truss gantry cranes, there must be deviations in the running speed of the gantry legs on both sides during the trolley travel. When this deviation accumulates to a certain extent, it will cause the wheels of the trolley to squeeze the side walls of the trolley track, resulting in "rail gnawing". Severe "rail gnawing" damages the wheels or rails, causing the wheels of the trolley to climb onto the track, resulting in safety accidents and seriously affecting normal production.

[0003] Therefore, how to detect, verify and correct the running deviation of the door legs on both sides to avoid damaging the wheels or rails is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0004] The object of the present invention is to provide a deviation correction device and a deviation correction method for a truss-type gantry crane, which can detect, verify and correct the running deviation of the gantry legs on both sides to avoid damaging the wheels or rails.

[0005] To achieve the above object, the present invention provides a deviation correction device for a truss-type gantry crane, comprising:

[0006] A walking track, comprising a first track and a second track which are parallel and spaced apart;

[0007] The gantry crane trolley comprises a first traveling mechanism matched with a first track, a first power source for driving the first traveling mechanism, a second traveling mechanism matched with a second track, and a second power source for driving the second traveling mechanism, the first traveling mechanism is provided with a first encoder and a first code scanner, the second traveling mechanism is provided with a second encoder and a second code scanner, the first encoder is used to detect the displacement of the first traveling mechanism, and the second encoder is used to detect the displacement of the second traveling mechanism;

[0008] The position code is fixedly arranged relative to the travel track, the position code includes a first position code and a second position code arranged in parallel and at intervals, the first scanner scans and identifies the first position code to determine the position of the first travel mechanism, and the second scanner scans and identifies the second position code to determine the position of the second travel mechanism;

[0009] The controller is connected to the first encoder, the first barcode scanner, the second encoder, and the second barcode scanner. The controller can obtain the position and / or displacement information of the first walking mechanism and the second walking mechanism to adjust the operation of the first power source and the second power source.

[0010] Preferably, the first power source is connected to a first frequency converter, the second power source is connected to a second frequency converter, and the controller can control the first frequency converter and the second frequency converter to adjust the operating frequencies of the first power source and the second power source.

[0011] Preferably, it also includes an installation component, which is used to install the first barcode scanner to the first walking mechanism and / or install the second barcode scanner to the second walking mechanism, and the installation component includes:

[0012] A first mounting plate is detachably connected to the first walking mechanism or the second walking mechanism;

[0013] A second mounting plate, connected to the first mounting plate and capable of moving in a vertical direction relative to the first mounting plate;

[0014] A first positioning member connected to the second mounting plate so that the moved second mounting plate is fixed relative to the first mounting plate;

[0015] A connector connected to the second mounting plate, and an end of the connector facing away from the second mounting plate is connected to the first barcode scanner or the second barcode scanner, and the connector can be close to and away from the position code relative to the second mounting plate;

[0016] The second positioning member is used to fix the connecting member to the second mounting plate.

[0017] Preferably, it also includes a first support frame and a second support frame, the first support frame and the second support frame are located on the side opposite to the first track and the second track, and the first support frame and the second support frame are both provided with a mounting plate parallel to the first track and the second track, and the first position code and the second position code are located on the corresponding mounting plates.

[0018] Preferably, the first position code is arranged on the first track, the second position code is arranged on the second track, and the first position code and the second position code are located on the opposite sides of the first track and the second track.

[0019] Preferably, the first encoder and the first code scanner are located in the middle of the first traveling mechanism in the extension direction of the first track, and the second encoder and the second code scanner are located in the middle of the second traveling mechanism in the extension direction of the second track.

[0020] Preferably, the first encoder and the second encoder are incremental encoders or absolute encoders.

[0021] A deviation correction method, applicable to the deviation correction device of the above truss-type gantry crane, comprising:

[0022] Read identification information of the first barcode scanner and the second barcode scanner, obtain the positions of the first walking mechanism and the second walking mechanism according to the position information corresponding to the identification information, and calculate the offset between the first walking mechanism and the second walking mechanism;

[0023] Read the output signals of the first encoder and the second encoder, obtain the displacements of the first walking mechanism and the second walking mechanism according to the output signals, and perform calculation processing to obtain the accumulated deviations generated during the walking process of the first walking mechanism and the second walking mechanism;

[0024] Operation of the first power source and the second power source is adjusted based on the offset and the accumulated deviation.

[0025] Preferably, the step of adjusting the operation of the first power source and the second power source according to the offset and the accumulated deviation specifically includes:

[0026] When the difference between the offset and the accumulated deviation is less than 5% of the offset, and at least one of the offset and the accumulated deviation is greater than or equal to a preset deviation value, position correction is performed;

[0027] When the difference between the offset and the cumulative deviation is less than 5% of the offset, and both the offset and the cumulative deviation are less than the preset deviation value, no position correction is performed;

[0028] When the difference between the offset and the accumulated deviation is greater than or equal to 5% of the offset, at least one of the first encoder, the first barcode scanner, the second encoder, and the second barcode scanner fails, and the controller outputs a fault signal;

[0029] Among them, the preset deviation value is a constant.

[0030] Preferably, when the difference between the offset and the accumulated deviation is less than 5% of the offset, and at least one of the offset and the accumulated deviation is greater than or equal to a preset deviation value, the step of performing position correction further includes:

[0031] When the first walking mechanism lags behind the second walking mechanism, the rotation speed of the first power source is increased and / or the rotation speed of the second power source is decreased according to the offset information;

[0032] When the second traveling mechanism lags behind the first traveling mechanism in operation, the rotation speed of the second power source is increased and / or the rotation speed of the first power source is decreased according to the offset information.

[0033] Compared with the above background technology, the deviation correction device of the truss-type gantry crane provided by the present invention has the following beneficial effects:

[0034] By using the first scanner to scan and identify the first position code to determine the position of the first walking mechanism, and the second scanner to scan and identify the second position code to determine the position of the second walking mechanism, the offset of the first walking mechanism and the second walking mechanism can be obtained, and the cumulative deviation of the first walking mechanism and the second walking mechanism can be obtained by the first encoder and the second encoder at the same time; when the offset and the cumulative deviation are consistent and exceed the preset deviation value, the output of the first power source and the second power source is adjusted by the controller to correct the operating deviation of the first walking mechanism and the second walking mechanism, so as to detect, verify and correct the operating deviation of the door legs on both sides to avoid damage to the wheels or rails. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A schematic structural diagram of a deviation-correcting device for a truss-type gantry crane provided in an embodiment of the present invention.

[0037] in:

[0038] 1-gantry crane trolley, 2-first power source, 3-second power source, 4-first encoder, 5-first barcode scanner, 6-second encoder, 7-second barcode scanner, 8-first position code, 9-second position code. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0042] The object of the present invention is to provide a deviation correction device and a deviation correction method for a truss-type gantry crane, which can detect, verify and correct the running deviation of the gantry legs on both sides to avoid damaging the wheels or rails.

[0043] See also Figure 1 To achieve the above-mentioned purpose, the present invention provides a deviation correction device for a truss-type gantry crane, comprising a walking track, a gantry crane trolley 1, a position code and a controller.

[0044] The walking track comprises a first track and a second track which are parallel and spaced apart.

[0045] The gantry crane trolley 1 is the main structure of the truss-type gantry crane and is located between the first track and the second track. The gantry crane trolley 1 includes a first traveling mechanism matched with the first track, a first power source 2 for driving the first traveling mechanism, a second traveling mechanism matched with the second track, and a second power source 3 for driving the second traveling mechanism. The first traveling mechanism is provided with a first encoder 4 and a first barcode scanner 5, and the second traveling mechanism is provided with a second encoder 6 and a second barcode scanner 7. The first encoder 4 is used to detect the displacement of the first traveling mechanism, and the second encoder 6 is used to detect the displacement of the second traveling mechanism.

[0046] The position code is fixed relative to the walking track, and the position code includes a first position code 8 and a second position code 9 which are arranged in parallel and at intervals. The first barcode scanner 5 scans and identifies the first position code 8 to determine the position of the first walking mechanism, and the second barcode scanner 7 scans and identifies the second position code 9 to determine the position of the second walking mechanism.

[0047] The real-time positions of the first traveling mechanism and the second traveling mechanism on both sides of the gantry crane trolley 1 can be obtained through the first barcode scanner 5 and the second barcode scanner 7, and then the offsets of the first traveling mechanism and the second traveling mechanism can be obtained; the displacements of the first traveling mechanism and the second traveling mechanism on both sides of the gantry crane trolley 1 can be obtained through the first encoder 4 and the second encoder 6, so as to obtain the cumulative deviations of the first traveling mechanism and the second traveling mechanism; by judging whether the offset and the cumulative deviation are consistent, the offset can be verified by the cumulative deviation, thereby avoiding the offset error caused by only setting the first barcode scanner 5 and the second barcode scanner 7, or only setting the first encoder 4 and the second encoder 6, and then correcting the deviation of the first traveling mechanism and the second traveling mechanism.

[0048] The controller is connected to the first encoder 4, the first barcode scanner 5, the second encoder 6, and the second barcode scanner 7. The controller can obtain the position and / or displacement information of the first walking mechanism and the second walking mechanism to adjust the operation of the first power source 2 and the second power source 3.

[0049] Among them, the first encoder 4 and the second encoder 6 are incremental encoders or absolute encoders, and the controller can specifically adopt a host computer, PLC, single-chip microcomputer, DCS, etc., which is not specifically limited here, as long as it can achieve the above purpose.

[0050] The first scanner 5 scans and identifies the first position code 8 to determine the position of the first walking mechanism, and the second scanner 7 scans and identifies the second position code 9 to determine the position of the second walking mechanism, so as to obtain the offset of the first walking mechanism and the second walking mechanism. At the same time, the accumulated deviation of the first walking mechanism and the second walking mechanism is obtained by the first encoder 4 and the second encoder 6. When the offset and the accumulated deviation are consistent and exceed the preset deviation value, the output of the first power source 2 and the second power source 3 is adjusted by the controller to correct the operation deviation of the first walking mechanism and the second walking mechanism. With this arrangement, the operation deviation of the door legs on both sides can be detected, verified and corrected to avoid damage to the wheels or rails.

[0051] The first barcode scanner 5 can scan the first position code 8 at a preset frequency, for example, scanning the first position code 8 once every 1 ms. Obviously, the scanning frequencies of the first barcode scanner 5 and the second barcode scanner 7 should be consistent, and they should scan at the same time, so that the real-time positions of the first walking mechanism and the second walking mechanism at the same time can be accurately obtained, so as to accurately realize the above-mentioned operation deviation correction.

[0052] Here, the scanning frequency can also be adjusted in real time. After the first barcode scanner 5 and the second barcode scanner 7 scan and identify for the previous preset number of times (specifically greater than or equal to 2 times), when it is determined that the offset of the first walking mechanism and the second walking mechanism does not exceed the preset deviation value, the next scanning frequency can be increased; for example, the above-mentioned preset number of times is set to 5 times. After the first barcode scanner 5 and the second barcode scanner 7 scan and identify for the 1st to 5th times, it is determined that the offset of the first walking mechanism and the second walking mechanism does not exceed the preset deviation value, that is, the operation of the first walking mechanism and the second walking mechanism can be regarded as synchronized. At this time, the time interval between the 5th and 6th scans can be increased, that is, there is no need to scan according to the previous scanning frequency, but the time interval between two adjacent scans can be appropriately increased. That is to say, as the number of scans increases, and on the premise that it is determined that the offset of the first walking mechanism and the second walking mechanism does not exceed the preset deviation value, the scanning frequency can continue to increase with the increase in the number of scans until the first walking mechanism and the second walking mechanism move a preset distance, and the scanning frequency no longer continues to increase.

[0053] In short, after the first several scans and identifications, if it is determined that the offset of the first walking mechanism and the second walking mechanism does not exceed the preset deviation value, the scanning frequency of the first barcode scanner 5 and the second barcode scanner 7 can be gradually increased until the movement displacement of the first walking mechanism and the second walking mechanism reaches a preset distance (that is, after the first walking mechanism and the second walking mechanism have moved a considerable distance, which can be specifically greater than or equal to 30 meters), the scanning frequency will no longer continue to increase to ensure the accuracy of subsequent movement; and in any scan and identification in the above process, once the offset or cumulative deviation of the first walking mechanism and the second walking mechanism exceeds the preset deviation value, the initial scanning frequency will be immediately restored to ensure the synchronization of the operation of the first walking mechanism and the second walking mechanism.

[0054] The first power source 2 is connected to a first frequency converter, and the second power source 3 is connected to a second frequency converter. The controller can control the first frequency converter and the second frequency converter to adjust the operating frequencies of the first power source 2 and the second power source 3 .

[0055] The first power source 2 and the second power source 3 can be motors. By connecting to the first and second frequency converters of the corresponding motors, the rotation speeds of the motors can be changed to complete the differential output on both sides of the gantry crane trolley 1 to achieve position correction. The first and second frequency converters can also be replaced by motor speed controllers, inverters, etc., as long as the above-mentioned purposes can be achieved.

[0056] It should be noted that in order to facilitate the installation of the first barcode scanner 5 and the second barcode scanner 7 to the specified position and realize position adjustment within a certain range, the correction device of the truss-type gantry crane also includes an installation component, which is used to install the first barcode scanner 5 to the first walking mechanism and / or install the second barcode scanner 7 to the second walking mechanism.

[0057] The mounting assembly includes a first mounting plate, a second mounting plate, a first positioning member, a connecting member and a second positioning member. The first mounting plate is detachably connected to the first walking mechanism or the second walking mechanism; the second mounting plate is connected to the first mounting plate and can move in a vertical direction relative to the first mounting plate; the first positioning member is connected to the second mounting plate so that the second mounting plate after movement is fixed relative to the first mounting plate; the connecting member is connected to the second mounting plate, and the end of the connecting member facing away from the second mounting plate is connected to the first barcode scanner 5 or the second barcode scanner 7, and the connecting member can approach and move away from the position code relative to the second mounting plate; the second positioning member is used to fix the connecting member to the second mounting plate.

[0058] Fixing the first mounting plate to the first walking mechanism or the second walking mechanism, and moving the second mounting plate vertically relative to the first mounting plate can adjust the height of the connecting piece. By moving the connecting piece relative to the second mounting plate, the distance between the first barcode scanner 5 and / or the second barcode scanner 7 and the position code can be adjusted, thereby improving the recognition accuracy of the first barcode scanner 5 and the second barcode scanner 7.

[0059] In some embodiments, the correction device of the truss-type gantry crane also includes a first support frame and a second support frame, the first support frame and the second support frame are located on the side opposite to the first rail and the second rail, and the first support frame and the second support frame are both provided with mounting plates parallel to the first rail and the second rail, and the first position code 8 and the second position code 9 are located on the corresponding mounting plates.

[0060] In some other embodiments, the first position code 8 is disposed on the first track, the second position code 9 is disposed on the second track, and the first position code 8 and the second position code 9 are located on the opposite side of the first track and the second track.

[0061] The distance between the first barcode scanner 5 and the first position code 8 and the distance between the second barcode scanner 7 and the second position code 9 are consistent, and the first barcode scanner 5, the first position code 8, the second barcode scanner 7, and the second position code 9 are arranged at the same height.

[0062] In order to facilitate the first barcode scanner 5 and the second barcode scanner 7 to recognize the position code accurately indicating the position of the gantry crane trolley 1, the first encoder 4 and the first barcode scanner 5 can be located in the middle of the first walking mechanism in the extension direction of the first track, and the second encoder 6 and the second barcode scanner 7 can be located in the middle of the second walking mechanism in the extension direction of the second track.

[0063] A correction method is applicable to the correction device of the above-mentioned truss-type gantry crane, comprising: reading identification information of a first barcode scanner 5 and a second barcode scanner 7, obtaining the positions of a first walking mechanism and a second walking mechanism according to position information corresponding to the identification information, and calculating an offset between the first walking mechanism and the second walking mechanism; reading output signals of a first encoder 4 and a second encoder 6, obtaining displacements of the first walking mechanism and the second walking mechanism according to the output signals, and performing calculation processing to obtain the accumulated deviation generated during the walking process of the first walking mechanism and the second walking mechanism; and adjusting the operation of a first power source 2 and a second power source 3 according to the offset and the accumulated deviation.

[0064] Among them, the steps of adjusting the operation of the first power source 2 and the second power source 3 according to the offset and the cumulative deviation specifically include: when the difference between the offset and the cumulative deviation is less than five percent of the offset, and at least one of the offset and the cumulative deviation is greater than or equal to the preset deviation value, position correction is performed; when the difference between the offset and the cumulative deviation is less than five percent of the offset, and both the offset and the cumulative deviation are less than the preset deviation value, no position correction is performed; when the difference between the offset and the cumulative deviation is greater than or equal to five percent of the offset, at least one of the first encoder 4, the first barcode scanner 5, the second encoder 6, and the second barcode scanner 7 fails, the controller outputs a fault signal, and the system of the correction device automatically or manually switches to complete the cut-in, waiting for the staff to check the fault point and perform maintenance to achieve subsequent reliable operation of the equipment; wherein, the preset deviation value is a constant.

[0065] When the difference between the offset and the cumulative deviation is less than five percent of the offset, and at least one of the offset and the cumulative deviation is greater than or equal to the preset deviation value, the position correction step also includes: when the first walking mechanism lags behind the second walking mechanism, the speed of the first power source 2 is increased and / or the speed of the second power source 3 is decreased according to the offset information; when the second walking mechanism lags behind the first walking mechanism, the speed of the second power source 3 is increased and / or the speed of the first power source 2 is decreased according to the offset information.

[0066] In addition, when the identification information of the first barcode scanner 5 and the second barcode scanner 7 are consistent again, the rotational speed of the first power source 2 is adjusted to be consistent with the rotational speed of the second power source 3. Specifically, the controller controls the first frequency converter connected to the first power source 2 and the second frequency converter connected to the second power source 3 to change the rotational speed of the first power source 2 and the rotational speed of the second power source 3.

[0067] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0068] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0069] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A deviation correction method, applicable to a deviation correction device of a truss-type gantry crane, the deviation correction device comprising: A walking track, comprising a first track and a second track which are parallel and spaced apart; The gantry crane trolley comprises a first traveling mechanism matched with the first track, a first power source for driving the first traveling mechanism, a second traveling mechanism matched with the second track, and a second power source for driving the second traveling mechanism, the first traveling mechanism is provided with a first encoder and a first code scanner, the second traveling mechanism is provided with a second encoder and a second code scanner, the first encoder is used to detect the displacement of the first traveling mechanism, and the second encoder is used to detect the displacement of the second traveling mechanism; A position code is fixedly arranged relative to the walking track, the position code includes a first position code and a second position code arranged in parallel and at intervals, the first code scanner scans and identifies the first position code to determine the position of the first walking mechanism, and the second code scanner scans and identifies the second position code to determine the position of the second walking mechanism; a controller connected to the first encoder, the first barcode scanner, the second encoder, and the second barcode scanner, the controller being capable of acquiring position and / or displacement information of the first walking mechanism and the second walking mechanism to adjust the operation of the first power source and the second power source; Characterized in that, the correction method comprises: Reading identification information of the first barcode scanner and the second barcode scanner, obtaining positions of the first walking mechanism and the second walking mechanism according to position information corresponding to the identification information, and calculating an offset between the first walking mechanism and the second walking mechanism; Reading output signals of the first encoder and the second encoder, obtaining displacements of the first walking mechanism and the second walking mechanism according to the output signals, and performing calculation processing to obtain accumulated deviations generated during the walking process of the first walking mechanism and the second walking mechanism; adjusting operation of the first power source and the second power source according to the offset and the accumulated deviation; The step of adjusting the operation of the first power source and the second power source according to the offset and the accumulated deviation specifically includes: When the difference between the offset and the accumulated deviation is less than 5% of the offset, and at least one of the offset and the accumulated deviation is greater than or equal to a preset deviation value, position correction is performed; When the difference between the offset and the cumulative deviation is less than 5% of the offset, and both the offset and the cumulative deviation are less than a preset deviation value, no position correction is performed; When the difference between the offset and the accumulated deviation is greater than or equal to 5% of the offset, at least one of the first encoder, the first barcode scanner, the second encoder, and the second barcode scanner fails, and the controller outputs a fault signal; Wherein, the preset deviation value is a constant.

2. The correction method according to claim 1, characterized in that: When the difference between the offset and the accumulated deviation is less than 5% of the offset, and at least one of the offset and the accumulated deviation is greater than or equal to a preset deviation value, the step of performing position correction further includes: When the first walking mechanism lags behind the second walking mechanism, the speed of the first power source is increased and / or the speed of the second power source is decreased according to the offset information; When the second walking mechanism lags behind the first walking mechanism in operation, the rotation speed of the second power source is increased and / or the rotation speed of the first power source is decreased according to the offset information.

3. A truss-type gantry crane deviation correction device, used to perform the deviation correction method described in claim 1 or 2, characterized in that: The first power source is connected to a first frequency converter, the second power source is connected to a second frequency converter, and the controller can control the first frequency converter and the second frequency converter to adjust the operating frequencies of the first power source and the second power source.

4. The deviation correction device for a truss-type gantry crane according to claim 3, characterized in that: It also includes an installation component, which is used to install the first barcode scanner on the first walking mechanism and / or install the second barcode scanner on the second walking mechanism, and the installation component includes: A first mounting plate, detachably connected to the first walking mechanism or the second walking mechanism; A second mounting plate, connected to the first mounting plate and capable of moving in a vertical direction relative to the first mounting plate; a first positioning member connected to the second mounting plate so that the moved second mounting plate is fixed relative to the first mounting plate; A connecting member connected to the second mounting plate, wherein one end of the connecting member facing away from the second mounting plate is connected to the first barcode scanner or the second barcode scanner, and the connecting member can approach and move away from the position code relative to the second mounting plate; The second positioning member is used to fix the connecting member to the second mounting plate.

5. The deviation correction device for a truss-type gantry crane according to claim 4, characterized in that: It also includes a first support frame and a second support frame, wherein the first support frame and the second support frame are located on the side opposite to the first track and the second track, and the first support frame and the second support frame are both provided with a mounting plate parallel to the first track and the second track, and the first position code and the second position code are located on the corresponding mounting plates.

6. The deviation correcting device for a truss-type gantry crane according to claim 4, characterized in that: The first position code is set on the first track, the second position code is set on the second track, and the first position code and the second position code are located on the side where the first track and the second track face each other.

7. The deviation correction device for a truss-type gantry crane according to claim 4, characterized in that: The first encoder and the first barcode scanner are located in the middle of the first walking mechanism in the extension direction of the first track, and the second encoder and the second barcode scanner are located in the middle of the second walking mechanism in the extension direction of the second track.

8. The deviation correcting device for a truss-type gantry crane according to claim 4, characterized in that: The first encoder and the second encoder are incremental encoders or absolute encoders.

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