Forklift testing rack with cargo inspection and straightening functions, and its inspection and straightening methods.

Abstract

The present application relates to the technical field of forklift examination, and specifically discloses a forklift examination storage rack with goods detection and return-to-zero function and a detection return-to-zero method thereof, which comprises a rack assembly and calibration goods, a reset return-to-zero assembly is installed on a storage plate in the rack assembly, a detection assembly is arranged above the rear side of the storage plate, and the reset return-to-zero assembly and the detection assembly are electrically connected with a control box; the detection assembly comprises a first distance measuring sensor that moves horizontally and measures the distance of the calibration goods on the upper surface of the storage plate in the longitudinal direction, and a second distance measuring sensor that measures the distance of the first distance measuring sensor in the horizontal direction; the present application does not require an operator to adjust the placement state and position of the calibration goods after each examination, the calibration goods after reset return-to-zero can always remain the same, thereby effectively ensuring the fairness of forklift examination, and the design of the reset return-to-zero assembly does not hinder or affect the loading or unloading process of the goods during forklift examination, and has good safety.

Description

Technical Field

[0001] This invention relates to the field of forklift testing technology, and specifically discloses a forklift testing rack with cargo detection and straightening functions, and a detection and straightening method thereof. Background Technology

[0002] As special-operation equipment, forklift operators need to undergo practical skills tests before being allowed to operate them. These tests involve various complex maneuvers such as loading, unloading, steering, and parking. Before the test ends, candidates must place designated goods on the corresponding pallets according to requirements and wait for the next candidate's turn. However, because many candidates are not experienced forklift operators, they often struggle to place the goods neatly on the pallets, frequently resulting in misalignment, lateral shifts, or incorrect placement. This leads to difficulties for subsequent test takers, compromising the fairness of the examination. Therefore, after each test, operators must manually straighten the goods, which is not only time-consuming and labor-intensive but also poses certain safety hazards.

[0003] Utility model patent application number 202321760378.2 discloses a forklift test stacking resetting device, including a stacking frame with a support plate for placing stacked items; a driving mechanism is provided on the support plate to drive the stacked items placed on the support plate to a set position on the support plate. This forklift test stacking resetting device utilizes clamping components on both sides to clamp and center the stacked items, aligning them, and then uses a traction component on the rear side to allow the stacked items to move back and forth for adjustment, thus ensuring that its position is in the center of the support plate, achieving automatic resetting of the stacked items. However, the design of this forklift test stacking resetting device has drawbacks. Since the clamping and traction components are all located on the upper surface of the support plate, during the practical test, the examinee also needs to place the stacked items on the support plate. Furthermore, since the examinee is not a skilled forklift driver, it is difficult to accurately grasp the position of the stacked items during loading and unloading, which can easily cause the stacked items to collide with the clamping and traction components, resulting in damage. Furthermore, the existing forklift test stacking reset device can only reset and straighten the stacked items; it cannot effectively determine the state of the stacked items placed on the support plate, requiring the examiner to judge and score it visually. Therefore, addressing the technical problem of needing to reset and adjust improperly placed stacked items during forklift practical tests, and the shortcomings of existing forklift test stacking reset devices that are easily damaged during the test and cannot determine the placement state of the stacked items, this application proposes a forklift test storage rack that effectively solves the above problems and features both cargo detection and repositioning capabilities. Summary of the Invention

[0004] The present invention aims to provide a forklift test rack with cargo detection and alignment, and a detection and alignment method thereof, to solve the shortcomings of traditional forklift test after the test, which require manual alignment and adjustment of the calibrated cargo and require examiners to visually judge the status of the calibrated cargo, as well as the shortcomings of existing forklift test stacking reset devices that are easily damaged by impact during the test and do not have a self-detection function for cargo status.

[0005] This invention is achieved through the following technical solution:

[0006] A forklift test rack with cargo detection and return function includes a rack assembly and a rectangular calibration cargo. A return assembly is installed on the shelf in the rack assembly, and a detection assembly is provided on the upper rear side of the shelf. The return assembly and the detection assembly are electrically connected to a control box.

[0007] The detection assembly includes a first ranging sensor that moves laterally and performs longitudinal distance measurement on the calibrated goods on the upper surface of the shelf, and a second ranging sensor that performs lateral distance measurement on the first ranging sensor.

[0008] The shelf has a longitudinal slot, and two transverse slots are symmetrically arranged on the left and right sides of the longitudinal slot. The reset and alignment component includes a first conveying component that is disposed in the longitudinal slot and conveys goods longitudinally and is controlled by a servo. Each of the two transverse slots has a second conveying component that conveys goods transversely and is controlled by a servo. The first conveying component has a servo-controlled turntable that is rotatably disposed in it, and the center of the turntable is located at the exact center point of the calibrated goods being correctly placed. A strip electromagnet is installed on the turntable and is arranged radially. In the initial state, the strip electromagnet and the center of the turntable are on the middle longitudinal line of the calibrated goods when they are correctly placed. A strip magnetic block is disposed on the middle longitudinal line of the lower surface of the calibrated goods.

[0009] As a further provision of the above solution, the detection component also includes a horizontal beam fixed on the rear column of the frame assembly. A transverse straight groove is provided in the horizontal beam, and a screw is rotatably installed in the transverse straight groove. One end of the screw is connected to a power motor. The first ranging sensor is provided with a protrusion extending into the transverse straight groove, and a screw hole that interacts with the screw is provided on the protrusion. The second ranging sensor is fixedly installed on one side of the horizontal beam and is arranged vertically toward the side of the first ranging sensor.

[0010] As a further provision of the above scheme, the lower end of the longitudinal strip opening is connected to a first strip frame, the first conveying component includes first belt rollers disposed at the front and rear ends of the first strip frame, and one end of the first belt roller is connected to a first servo motor, and a first conveyor belt with its upper end extending out of the longitudinal strip opening is disposed between the two first belt rollers.

[0011] As a further provision of the above scheme, the lower end of the transverse strip opening is connected to a second strip frame, the second conveying component includes second belt rollers disposed at the left and right ends of the second strip frame, and one end of the second belt roller is connected to a second servo motor, and a second conveyor belt with its upper end extending out of the transverse strip opening is disposed between the two second belt rollers.

[0012] As a further provision of the above scheme, the first conveyor belt is provided with mounting plates whose two ends are fixedly connected to the left and right sides of the first strip frame, the turntable is rotatably mounted on the upper surface of the mounting plate, and the mounting plate is provided with a third servo motor for driving the turntable.

[0013] As a further feature of the above scheme, the frame assembly includes three sets of uprights spaced apart on the left and right, with a shelf installed between each pair of adjacent sets of uprights.

[0014] As a further feature of the above scheme, the calibration goods are made of plastic injection molding, and an insertion hole is provided at the lower end of the front side of the calibration goods. The calibration goods located above the insertion hole are hollow.

[0015] This invention also discloses a method for self-detection and alignment of cargo placement status based on the above-mentioned forklift test rack, comprising the following steps:

[0016] (1) After the examinee places the calibrated goods on the shelf and completes the vehicle retraction, control the first distance sensor to move laterally and complete the longitudinal distance measurement of the calibrated goods during the lateral movement. At the same time, the second distance sensor performs lateral distance measurement on the second distance sensor.

[0017] (2) The first and second ranging sensors transmit the measured data in real time to the control box. The processor inside the control box establishes a planar coordinate system about the longitudinal and lateral distances and generates the trajectory equation in the planar coordinate system based on the longitudinal and lateral distances.

[0018] (3) The controller determines the placement status of the calibrated goods by generating the trajectory equation and generates the corresponding reset and return command;

[0019] (4) The reset and return assembly, according to the reset and return command, completes the horizontal and vertical movement reset of the calibrated goods through the action of the first conveying assembly, the second conveying assembly, the turntable, and the bar electromagnet, and then returns to the center by magnetic attraction and rotation.

[0020] As a further setting of the above scheme, there are eight types of goods placement states in step 3: centering, left / right offset, front / back offset, four-way offset, centering tilt, left / right offset tilt, front / back offset tilt, and four-way offset tilt.

[0021] As a further step in the above scheme, the magnetic rotation return process in step 4 is as follows: First, the turntable is rotated at a certain angle according to the measured tilt angle of the calibrated goods, so that the bar electromagnet and the bar magnetic block are aligned vertically. Then, current is passed into the bar electromagnet to generate a magnetic attraction force on the calibrated goods. Then, the third servo motor is controlled to rotate in the opposite direction by a corresponding angle, so that the calibrated goods can be rotated back to the center.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The forklift testing rack disclosed in this invention allows for longitudinal scanning and distance measurement of the calibrated goods by a first ranging sensor in the detection component after the examinee places the calibrated goods on the rack and completes the test. Simultaneously, a second ranging sensor detects the lateral position of the first ranging sensor in real time. The control box processes the two sets of data to obtain the placement position and status of the calibrated goods. Based on the processed information, a corresponding reset and straightening command is automatically generated. Under the action of the reset and straightening component, the calibrated goods are automatically reset and straightened. This eliminates the need for operators to adjust the placement and position of the calibrated goods after each test, reducing the workload of operators. Furthermore, the calibrated goods remain identical after reset and straightening, ensuring that the conditions before the test are consistent for different examinees, thereby effectively guaranteeing the fairness of the forklift testing.

[0024] 2. The reset and return assembly in this invention can move the placed calibrated goods longitudinally and laterally through the first and second conveying assemblies. The turntable and bar electromagnet work together to magnetically rotate and return the calibrated goods to their correct position after the reset and movement. The design of the entire reset and return assembly will not hinder or affect the loading or unloading process of goods during the forklift test, and will not be damaged by collisions with goods. It has good safety and can ensure the smooth conduct of the forklift test.

[0025] 3. The operation of the first conveying component, the second conveying component, and the turntable in this invention is all controlled by servo, which can accurately adjust the position and status of the calibrated goods after the exam. At the same time, the position and status of the calibrated goods measured by the detection component can be wirelessly transmitted to the exam control center, so that the examiners can understand whether the placement and status of the calibrated goods meet the requirements through the computer, and thus use it as a basis for scoring, ensuring the fairness of the exam evaluation. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0028] Figure 2 This is a schematic diagram of the second-angle three-dimensional structure of the present invention;

[0029] Figure 3 This is a three-dimensional structural diagram of the placement plate and the reset and alignment component from the first angle in this invention;

[0030] Figure 4 This is a two-dimensional structural diagram of the placement plate and the reset and alignment component in this invention from a second angle.

[0031] Figure 5 This is a three-dimensional structural diagram of the placement plate, the reset and alignment component, and the calibrated goods in this invention;

[0032] Figure 6 This is a three-dimensional structural diagram of the detection component in this invention;

[0033] Figure 7 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the centered and aligned state in this invention;

[0034] Figure 8 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the left / right offset state in this invention;

[0035] Figure 9 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the forward / backward offset state in this invention;

[0036] Figure 10 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the four-way offset state in this invention;

[0037] Figure 11 This is a plan view and coordinate system diagram of the calibrated goods in the centrally tilted state in this invention;

[0038] Figure 12 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the left / right offset and tilt state in this invention;

[0039] Figure 13 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the forward / backward offset and tilt state in this invention;

[0040] Figure 14 This is a planar schematic diagram and coordinate system diagram of the calibrated goods in the present invention under a four-way offset and tilt state. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-14 This application will be described in detail with reference to the embodiments.

[0043] Example 1

[0044] Example 1 discloses a forklift testing rack with cargo detection and straightening functions, see attached figure. Figure 1 and attached Figure 2 Its main components include frame assembly 1, detection component 2, reset and return component 3, calibration cargo 4, and control box 5.

[0045] The frame assembly 1 includes three sets of uprights 101 spaced apart on the left and right. A shelf 102 is installed between each pair of adjacent uprights 101, and the two adjacent shelf 102 are staggered vertically according to the examination requirements. A detection component 2 is installed on the upper rear side of each shelf 102, and a reset and alignment component 3 is installed on each shelf 102. All detection components 2 and reset and alignment components 3 are electrically connected to the control box 5 through wires, so that the processor inside the control box 5 can receive information in real time, and automatically generate corresponding control commands after analysis and processing.

[0046] Reference Appendix Figure 2 and attached Figure 6The detection component 2 includes a first ranging sensor 201 that moves laterally and a second ranging sensor 202 that detects the lateral position of the first ranging sensor 201 in real time. Laser ranging sensors are preferred for both the first and second ranging sensors. Specifically, a horizontal beam 203 is fixedly connected to two columns 101 on the rear side of the shelf 102. A horizontal straight groove is formed on the horizontal beam 203, and a screw 204 is rotatably connected to the groove. One end of the screw 204 is connected to a power motor 205. The first ranging sensor 201 has a protrusion 206 extending into the horizontal straight groove, and the protrusion 206 has a screw hole that interacts with the screw 204. This allows the power motor 205 to control the rotation of the screw 204, thereby enabling the first ranging sensor 201 to move laterally and continuously measure the longitudinal distance of the rear side of the calibrated goods 4 placed on the shelf 102 during its lateral movement. The second ranging sensor 202 is fixedly installed on one side of the horizontal beam 203 and is vertically oriented towards the side of the first ranging sensor 201. This allows the lateral position of the first ranging sensor 201 to be detected in real time during its lateral movement, and the data measured by the first and second ranging sensors 201 can be fed back to the control box 5. Furthermore, a wireless transmission module can be installed in the control box 5 to transmit the processed data to the server of the examination control center, where scoring is based on the placement of the calibrated goods 4 on the shelf.

[0047] Reference Appendix Figure 2 Appendix Figure 3 and attached Figure 4 A longitudinal slot 103 is provided on the shelf 102, and two transverse slots 104 are symmetrically provided on the left and right sides of the longitudinal slot 103. The reset and return assembly 3 includes a first strip frame 301 connected to the lower end of the longitudinal slot 103. A first belt roller 302 is provided at each of the front and rear ends of the first strip frame 302, and a first servo motor 303 is connected to the end of one of the first belt rollers 302. A first conveyor belt 304 is provided between the two first belt rollers 302, and the upper surface of the first conveyor belt 304 extends out of the longitudinal slot 103. A second strip frame 305 is connected to the lower end of each of the two transverse strip openings 104. A second belt roller 306 is provided at each of the left and right ends of the second strip frame 305. A second servo motor 307 is connected to the end of one of the second belt rollers 306. A second conveyor belt 308 is provided between the two second belt rollers 306. The upper surface of the second conveyor belt 308 extends out of the transverse strip openings 104.

[0048] Furthermore, the reset and alignment assembly 3 also includes a mounting plate 309 disposed inside the first conveyor belt 304 and fixedly connected at both ends to the left and right sides of the first strip frame 301. A turntable 310 is rotatably connected to the upper surface of the mounting plate 309, such that the center of the turntable 310 is located at the exact center point of the correctly placed calibration goods 4. A third servo motor 312 for driving the turntable 310 to rotate is mounted on the mounting plate 309. A radially arranged bar electromagnet 311 is also mounted on the turntable 310, and in the initial state, the bar electromagnet 311 and the center of the turntable 310 are on the same longitudinal line (i.e., on the longitudinal line in the middle of the correctly placed calibration goods 4).

[0049] Finally, in this embodiment 1, the calibration cargo 4 is preferably made of plastic injection molding. Its overall shape is set as a cuboid according to the examination requirements, and insertion holes 401 for inserting forklift forks are provided on the left and right sides of its lower front side. A longitudinally arranged strip magnetic block 402 is also provided at the center of the lower surface of the calibration cargo 4. Furthermore, the calibration cargo 4 above the insertion holes 401 is made hollow, so that the weight of the entire calibration cargo 4 is controlled to be around 4-6 kg. At the same time, the vertical distance between the strip electromagnet 311 and the lower surface of the calibration cargo 4 placed on the shelf 102 does not exceed 5 mm, ensuring that the magnetic force generated by the strip electromagnet 311 on the strip magnetic block 402 after being energized is sufficient to rotate the calibration cargo 4 back to its original position.

[0050] In the use of the forklift testing rack disclosed in Embodiment 1, after the examinee places the calibrated goods 4 on the upper surface of the storage plate 102, the detection component 2 starts to operate. First, the power motor 205 drives the screw 204 to rotate, thereby causing the first distance sensor 201 to move from one end to the other along the transverse straight groove. During the movement of the first distance sensor 201, the first distance sensor 201 measures the longitudinal distance of the obstacle in front in real time and feeds it back to the control box 5. At the same time, during the linear movement of the first distance sensor 201, the second distance sensor 202 measures the lateral position of the first distance sensor 201 and feeds it back to the control box 5. Then, the processor inside the control box 5 establishes a planar coordinate system about the longitudinal and lateral distances based on the detected longitudinal and lateral distances, and then determines the state of the calibrated goods 4 placed on the storage plate 102 by the trajectory in the coordinate system.

[0051] During the forklift test, there are eight possible states for the marked goods 4 placed on the pallet 102: centered, left / right offset, front / back offset, four-way offset, centered tilt, left / right offset tilt, front / back offset tilt, and four-way offset tilt. The following is a detailed explanation of these states in conjunction with the attached diagram. Figures 7-14 Each point will be explained in detail.

[0052] Reference Appendix Figure 7 When the calibrated cargo 4 is in a centered and aligned state, there is a horizontal line segment in the middle of the trajectory in the established planar coordinate system regarding the longitudinal and lateral distances, and the midpoint of the horizontal line segment is equal to the preset standard longitudinal coordinate y0 and standard lateral coordinate x0.

[0053] Reference Appendix Figure 8 When the calibrated cargo 4 is in a left / right offset state, there is a horizontal line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the horizontal line segment is equal to the preset standard longitudinal coordinate y0, but there is a certain deviation from the standard lateral coordinate x0, which can be offset to the left or right.

[0054] Reference Appendix Figure 9 When the calibrated cargo 4 is in a forward / backward offset state, there is a horizontal line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the horizontal line segment is equal to the preset standard lateral coordinate x0, but there is a certain deviation from the standard longitudinal coordinate y0. It can be a forward or backward offset.

[0055] Reference Appendix Figure 10 When the calibrated cargo 4 is in a four-way offset state, there is a horizontal line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the horizontal line segment is not equal to the preset standard longitudinal coordinate y0 and standard lateral coordinate x0, so that there are both left-right and front-back offsets at the same time.

[0056] Reference Appendix Figure 11 When the calibrated cargo 4 is in a centered tilted state, there is a diagonal line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the diagonal line segment is equal to the preset standard longitudinal coordinate y0 and standard lateral coordinate x0, and the slope of the diagonal line segment is equal to the tilt angle of the calibrated cargo 4.

[0057] Reference Appendix Figure 12 When the calibrated cargo 4 is in a left / right offset tilt state, there is a slanted line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the slanted line segment is equal to the preset standard longitudinal coordinate y0, but there is a certain deviation from the standard lateral coordinate x0. It can be offset to the left or right, and the slope of the slanted line segment is equal to the tilt angle of the calibrated cargo 4.

[0058] Reference Appendix Figure 13 When the calibrated cargo 4 is in a forward / backward tilted state, there is a slanted line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the slanted line segment is equal to the preset standard lateral coordinate x0, but there is a certain deviation from the standard longitudinal coordinate y0. It can be shifted forward or backward, and the slope of the slanted line segment is equal to the tilt angle of the calibrated cargo 4.

[0059] Reference Appendix Figure 14 When the calibrated cargo 4 is in a four-way offset tilt state, there is a slanted line segment in the middle of the trajectory in the established planar coordinate system about the longitudinal and lateral distances. The midpoint of the slanted line segment is not equal to the preset standard longitudinal coordinate y0 and standard lateral coordinate x0, and there is also a left-right and front-back offset at the same time. Similarly, the slope of the slanted line segment is equal to the tilt angle of the calibrated cargo 4.

[0060] After the forklift practical test is completed, the processor inside the control box 5 determines the status of the calibrated goods 4 placed during the forklift test. Based on the corresponding status, it calculates the front-to-back offset value, left-to-right offset value, and tilt angle parameters, and then automatically generates the corresponding reset and return-to-center command.

[0061] When the calibrated goods 4 are in the centered and aligned state, the reset and alignment component 3 does not operate.

[0062] When the calibrated cargo 4 is in a left / right offset state, according to the lateral distance deviation value The second servo motor 307 is controlled to rotate at a certain angle in a set direction, and then the calibrated goods 4 can be moved laterally and reset under the action of the second conveyor belt 308.

[0063] When the calibrated cargo 4 is in a forward / backward offset state, according to the longitudinal distance deviation value The first servo motor 303 is controlled to rotate a certain angle in a set direction, and then the calibrated goods 4 can be moved longitudinally and reset under the action of the first conveyor belt 304.

[0064] When the calibrated cargo 4 is in a four-way offset state, according to the lateral distance deviation value and longitudinal distance deviation value The first servo motor 303 and the second servo motor 307 are controlled to rotate at a certain angle in a set direction, thereby moving and resetting the calibrated goods 4 under the sequential conveying adjustment of the first conveyor belt 304 and the second conveyor belt 308.

[0065] When the calibrated cargo 4 is in a centered tilted state, according to the tilt angle of the oblique line segment in the coordinate system, the third servo motor 312 is first controlled to rotate a certain angle so that the bar electromagnet 311 and the bar magnetic block 402 are aligned vertically. Then, current is passed into the bar electromagnet 311 to generate a magnetic attraction force on the calibrated cargo 4. Then, the third servo motor 312 is controlled to rotate in the opposite direction by a corresponding angle, so that the calibrated cargo 4 can be rotated back to the centered position.

[0066] When the calibrated cargo 4 is in a left / right offset or tilted state, first determine the lateral distance deviation value. The second servo motor 307 is controlled to rotate a certain angle in a set direction. Under the action of the second conveyor belt 308, the calibrated goods 4 can be moved laterally and reset. Then, according to the inclination angle of the oblique line segment in the coordinate system, the third servo motor 312 is controlled to rotate a certain angle so that the bar electromagnet 311 and the bar magnetic block 402 are aligned vertically. Then, current is passed into the bar electromagnet 311 to generate a magnetic attraction force on the calibrated goods 4. Finally, the third servo motor 312 is controlled to rotate in the opposite direction by a corresponding angle, so that the calibrated goods 4 can be rotated and reset back to the correct position.

[0067] When the calibrated cargo 4 is in a forward / backward tilted state, first determine the longitudinal distance deviation value. The first servo motor 303 is controlled to rotate a certain angle in a set direction. Under the action of the first conveyor belt 304, the calibrated goods 4 can be moved longitudinally and reset. Then, according to the inclination angle of the oblique line segment in the coordinate system, the third servo motor 312 is controlled to rotate a certain angle so that the bar electromagnet 311 and the bar magnetic block 402 are aligned vertically. Then, current is passed into the bar electromagnet 311 to generate a magnetic attraction force on the calibrated goods 4. Finally, the third servo motor 312 is controlled to rotate in the opposite direction by a corresponding angle, so that the calibrated goods 4 can be rotated and reset back to the correct position.

[0068] When the calibrated cargo 4 is in a four-way offset and tilted state, first determine the lateral distance deviation value. and longitudinal distance deviation value The first servo motor 303 and the second servo motor 307 are controlled to rotate a certain angle in a set direction. Under the sequential conveying and adjustment of the first conveyor belt 304 and the second conveyor belt 308, the calibrated goods 4 are moved and reset. Then, according to the inclination angle of the oblique line segment in the coordinate system, the third servo motor 312 is controlled to rotate a certain angle so that the bar electromagnet 311 and the bar magnetic block 402 are aligned vertically. Then, current is passed into the bar electromagnet 311 to generate a magnetic attraction force on the calibrated goods 4. Finally, the third servo motor 312 is controlled to rotate in the opposite direction by a corresponding angle, so that the calibrated goods 4 can be rotated and reset back to the correct position.

[0069] In this embodiment 1, through the hardware design of the detection component 2 and the reset and straightening component 3, after the candidate has placed the calibrated goods 4 in the forklift test, the placement position and state of the calibrated goods 4 can be detected first. Then, based on the detected information, the corresponding reset and straightening command is automatically generated to adjust the calibrated goods 4 to the set standard initial state. This process not only eliminates the need for manual straightening of the calibrated goods 4, but also ensures that all candidates have the same conditions before the forklift practical test, thereby guaranteeing the fairness of the test.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A forklift test rack with goods detection and righting, comprising a rack body assembly and a cuboid-shaped calibration goods, characterized in that, The reset and returning component is installed on the storage plate in the frame assembly, a detection component is arranged above the rear side of the storage plate, and the reset and returning component and the detection component are commonly electrically connected with a control box; The detection component comprises a first distance measuring sensor which moves horizontally and measures the longitudinal distance of the calibrated goods on the upper surface of the storage plate, and a second distance measuring sensor which measures the horizontal distance of the first distance measuring sensor; A longitudinal strip-shaped opening is formed in the storage plate, two lateral strip-shaped openings are symmetrically formed on the left and right sides of the longitudinal strip-shaped opening, the reset and returning component comprises a first conveying component which is arranged in the longitudinal strip-shaped opening and is conveyed in the longitudinal direction and is controlled by a servo, two second conveying components which are arranged in the two lateral strip-shaped openings and are conveyed in the horizontal direction and are controlled by a servo, a rotating disc which is rotatably arranged in the first conveying component and is controlled by a servo, the center of the rotating disc is located at the center point of the correct placement of the calibrated goods, a strip-shaped electromagnet which is arranged in the radial direction of the rotating disc, the center of the strip-shaped electromagnet and the center of the rotating disc are located on the middle longitudinal line of the calibrated goods in the correct placement in the initial state, and a strip-shaped magnetic block is arranged on the middle longitudinal line of the lower surface of the calibrated goods; The goods detection and returning method of the forklift examination storage rack comprises the following steps: (1) after the examinee places the calibrated goods on the storage plate and completes the parking, the first distance measuring sensor is controlled to move horizontally, and the longitudinal distance of the calibrated goods is measured in the horizontal movement, and the second distance measuring sensor measures the horizontal distance of the first distance measuring sensor; (2) the first distance measuring sensor and the second distance measuring sensor transmit the real-time measured data to the control box, the processor in the control box establishes a plane coordinate system about the longitudinal and horizontal distances, and generates a trajectory equation in the plane coordinate system according to the longitudinal and horizontal distances; (3) the controller judges the placement state of the calibrated goods through the generated trajectory equation, and generates corresponding reset and returning instructions; (4) the reset and returning component moves and resets the calibrated goods in the horizontal and longitudinal directions through the first conveying component, the second conveying component, the rotating disc and the strip-shaped electromagnet according to the reset and returning instructions, and then rotates and returns the calibrated goods through the magnetic attraction.

2. The forklift testing rack with cargo detection and righting according to claim 1, characterized in that, The detection component further comprises a horizontal crossbeam which is fixed on the rear side column of the frame assembly, a horizontal linear groove is formed in the horizontal crossbeam, a screw rod is rotatably arranged in the horizontal linear groove, one end of the screw rod is connected with a power motor, a protruding part is arranged on the first distance measuring sensor and extends into the horizontal linear groove, a screw hole is formed in the protruding part and interacts with the screw rod, the second distance measuring sensor is fixedly installed on one side end of the horizontal crossbeam and vertically faces the side of the first distance measuring sensor.

3. The forklift testing rack with cargo detection and righting according to claim 1, characterized in that, The lower end of the longitudinal strip-shaped opening is connected with a first strip-shaped frame, the first conveying component comprises first rollers which are arranged at the front and rear ends of the first strip-shaped frame, one end of one of the first rollers is connected with a first servo motor, and a first conveying belt which extends out of the longitudinal strip-shaped opening at the upper end is arranged between the two first rollers.

4. The forklift testing rack with cargo detection and righting according to claim 3, characterized in that, The lower end of the transverse strip-shaped port is communicated with a second strip-shaped frame, the second conveying assembly comprises second belt rollers arranged at the left and right ends of the second strip-shaped frame, one end of one of the second belt rollers is connected with a second servo motor, and a second conveying belt is arranged between the two second belt rollers and extends out of the transverse strip-shaped port at the upper end.

5. The forklift testing rack with cargo detection and righting according to claim 3, wherein, The first conveying belt is provided with a mounting plate fixedly connected with the left and right side surfaces of the first strip-shaped frame at two ends, the rotating disc is rotatably arranged on the upper surface of the mounting plate, and the mounting plate is provided with a third servo motor for driving the rotating disc.

6. The forklift testing rack with cargo detection and righting according to claim 1, wherein, The frame assembly comprises three groups of vertically spaced apart stand columns, and a storage plate is arranged between each adjacent two groups of stand columns.

7. The forklift testing rack with cargo detection and righting according to claim 1, wherein, The calibration goods are made of plastic by injection molding, a jack is formed at the lower end of the front side of the calibration goods, and the calibration goods above the jack are hollow.

8. The forklift testing rack with cargo detection and righting according to claim 1, wherein, The placing state of the calibration goods in step 3 includes eight states, i.e., center alignment, left / right deviation, front / back deviation, four-way deviation, center inclination, left / right deviation inclination, front / back deviation inclination and four-way deviation inclination.

9. The forklift testing rack with cargo detection and righting according to claim 1, wherein, In the magnetic attraction rotating return process in step 4, the rotating disc is first rotated by a certain angle according to the measured inclination angle of the calibration goods, the strip-shaped electromagnet is aligned with the strip-shaped magnetic attraction block, current is then input into the strip-shaped electromagnet to generate magnetic attraction force on the calibration goods, and then the third servo motor is controlled to rotate reversely by a corresponding angle, so that the calibration goods can be rotated back to the normal position.

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