Forklift control system and control method based on load curve graph and forklift

Abstract

The invention relates to a forklift control system based on a load curve graph, and the forklift control system takes the forklift load curve graph as a setting basis, and analyzes and judges whether a forklift adopts measures such as deceleration and incapability of lifting or not within an allowable range through a monitoring speed detection device, a lifting height detection device and a lifting weight detection device. Therefore, the probability of accidents such as rollover or tipping of the forklift is reduced, the driving speed can reach the corresponding maximum allowable speed, the working efficiency is improved, meanwhile, the safety of the forklift in the driving process is guaranteed, and the use experience of a user is enhanced. And popularization and application of the forklift control system based on the load curve graph in the technical field of forklifts or hoisting equipment are facilitated. The forklift control method based on the load curve graph also has the advantage of guaranteeing the safety of the forklift in the using process. The forklift also has the advantages of being high in safety and reliability, and popularization and application of the forklift in the market are facilitated.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, particularly forklifts, specifically a forklift control system, control method, and forklift based on a load curve graph. Background Technology

[0002] A forklift is an industrial material handling vehicle primarily used for loading, unloading, stacking, and short-distance transport of goods. It is widely used in ports, railway stations, airports, freight yards, factory workshops, warehouses, distribution centers, and other similar locations. The main components of a forklift include a power unit, chassis, working device, hydraulic system, and electrical equipment. Common types of forklifts include internal combustion forklifts (fueled by gasoline, diesel, or liquefied petroleum gas) and electric forklifts (powered by batteries).

[0003] With the rapid development of society and the economy, forklifts, as material handling equipment, are widely used in various industries. Although forklifts do not account for a large proportion of special equipment, they have ranked first in the total number of accidents in recent years. Among these accidents, many forklifts overturn due to a disproportion between lifting height, travel speed, and fork load capacity. In actual operation, forklifts cannot automatically adjust the relationship between lifting height, travel speed, and fork load capacity, leading to accidents such as side rollovers or tipping over due to the aforementioned reasons. This affects the user experience and hinders the promotion and application of forklifts in the market. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the first objective of this invention is to provide a forklift control system based on a load curve graph. This control system uses the forklift load curve graph as its setting basis. Within permissible limits, it analyzes and determines whether the forklift should take measures such as deceleration or inability to lift by monitoring speed detection devices, lifting height detection devices, and lifting weight detection devices. This reduces the probability of forklift tipping or overturning accidents, ensures forklift safety during use, enhances the user experience, and facilitates the promotion and application of the load curve graph-based forklift control system in the field of forklift or lifting equipment technology. The second objective of this invention is to provide a forklift control method based on a load curve graph. By applying the aforementioned load curve graph-based forklift control system, it also has the advantage of ensuring forklift safety during use. The third objective of this invention is to provide a forklift that, by applying the aforementioned load curve graph-based forklift control system, also has the advantages of high safety and high reliability, enhances the user experience, and facilitates the promotion and application of the forklift in the market.

[0005] The forklift control system based on load curve, the forklift control method based on load curve, and the forklift described above are technically related and belong to the same inventive concept.

[0006] To achieve the first objective mentioned above, the present invention adopts the following technical solution: a forklift control system based on a load curve diagram, comprising a parameter setting module, a lifting height detection device, a lifting weight detection device, a speed detection device, and a vehicle control module. The parameter setting module is used to preset the lifting height range and lifting weight range of the forks on the forklift. The lifting height detection device is used to measure the lifting height of the forks, the lifting weight detection device is used to measure the lifting weight of the forks, and the speed detection device is used to monitor the operating speed of the forklift. The vehicle control module is connected to the parameter setting module, the lifting height detection device, the lifting weight detection device, and the speed detection device and is used to receive signals from the parameter setting module, the lifting height detection device, the lifting weight detection device, and the speed detection device. The data detected by the device also includes a load judgment module, a height judgment module, and an electric drive control module. The load judgment module is used to determine whether the weight on the lifting weight detection device is within the setting range of the parameter setting module. The height judgment module is used to determine whether the lifting height detection device is within the setting range of the parameter setting module. The electric drive control module controls the forklift's operating speed based on the output data of the load judgment module and the height judgment module. When the forklift's fork load gradually increases or the fork lifting height gradually increases, the vehicle control module controls the forklift's maximum allowable travel speed to gradually decrease. When the forklift's fork load gradually decreases or the fork lifting height gradually decreases, the vehicle control module controls the forklift's maximum allowable travel speed to gradually increase.

[0007] As a preferred embodiment of the present invention, the lifting height detection device is a pull-rope encoder, which can obtain the lifting height of the forks in real time and transmit the measured height data to the vehicle control module.

[0008] As a preferred embodiment of the present invention, the lifting weight detection device is a weighing fork, which can obtain the lifting weight of the fork in real time and transmit the measured weight data to the vehicle control module.

[0009] As a preferred embodiment of the present invention, the vehicle control module compares and analyzes the data detected by the lifting height detection device, the lifting weight detection device and the speed detection device with a pre-set forklift load curve. When the detected data exceeds the range allowed by the load curve, the vehicle control module controls the forklift to decelerate.

[0010] As a preferred embodiment of the present invention, the vehicle control module compares and analyzes the data detected by the lifting height detection device, the lifting weight detection device and the speed detection device with a pre-set forklift load curve. When the detected data exceeds the range allowed by the load curve, the vehicle control module controls the forklift to stop rising.

[0011] In a preferred embodiment of the present invention, the electric drive control module includes a high-position control module and a low-position control module. When the height judgment module determines that it is in a high position, the electric drive control module performs high-position low-speed operation; when the height judgment module determines that it is in a low position, the electric drive control module performs low-position high-speed operation.

[0012] As a preferred embodiment of the present invention, the vehicle control module further includes a data storage unit for storing data from the parameter setting module, the lifting height detection device, the lifting weight detection device, and the speed detection device.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The forklift control system based on load curve diagram of the present invention, through parameter setting module, lifting height detection device, lifting weight detection device, speed detection device and vehicle control module, can monitor the forklift's travel speed, fork lifting height and fork load weight in real time. The vehicle control module can control the forklift in real time according to the above data, that is, control the forklift speed according to different load amounts and load heights, so that the three are linked and the travel speed can reach the corresponding maximum allowable speed, improve work efficiency while ensuring the safety of the forklift during travel, reduce the probability of forklift rollover or tipping accidents, enhance the user experience, and facilitate the promotion and application of the above-mentioned forklift control system based on load curve diagram in the field of forklift or lifting equipment technology.

[0014] To achieve the second objective mentioned above, the present invention adopts the following technical solution: a forklift control method based on a load curve diagram, comprising the following steps: S1. The parameter setting module presets the lifting height range and load weight range of the forks on the forklift. S2. The lifting height of the forks is detected by the lifting height detection device, the load weight of the forks is detected by the lifting weight detection device, and the running speed of the forklift is detected by the speed detection device. S3. Determine whether the forklift is in a loaded or unloaded state using the load determination module. S4. When the load judgment module determines that the forklift is in a loaded state, the height judgment module then determines the height of the forks. When the forks are in a high position, the electric drive control module controls the forklift to travel at a low speed in a high position; when the forks are in a low position, the electric drive control module controls the forklift to travel at a high speed in a low position. S5. When the load judgment module determines that the forklift is in an unloaded state, the height judgment module then determines the height of the forks. When the forks are in a low position, the electric drive control module controls the forklift to travel at high speed in a low position; when the forks are in a high position, the electric drive control module controls the forklift to travel at low speed in a high position.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the forklift control method based on load curve diagram in the present invention, by applying the above-mentioned forklift control system based on load curve diagram, also has the advantage of ensuring the safety of the forklift during use.

[0016] A third objective of this invention is to provide a forklift that utilizes the aforementioned forklift control system based on a load curve.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the forklift of the present invention, by applying the above-mentioned forklift control system based on load curve diagram, also has the advantages of high safety and high reliability, enhances the user experience, and is conducive to the promotion and application of the above-mentioned forklift in the market. Attached Figure Description

[0018] Figure 1 This is the control logic diagram of the forklift control system based on the load curve diagram in this embodiment of the invention; Figure 2 This is a schematic diagram of the control curve in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0020] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example: Figure 1 and Figure 2 As shown, a forklift control system based on a load curve diagram mainly consists of a parameter setting module, a lifting height detection device, a lifting weight detection device, a speed detection device, and a vehicle control module. The parameter setting module is used to preset the lifting height range and lifting weight range of the forklift's forks. Different forklift models have different maximum lifting heights and maximum load capacities; parameter settings should be based on the maximum specifications provided by the forklift. Specifically, the allowable lifting height range can be input into the parameter setting module based on the forklift's maximum lifting height and the requirements of the working environment; the allowable lifting weight range can be input into the parameter setting module based on the forklift's maximum load capacity and the characteristics of the goods. After confirming that the input parameters are correct, the data is saved to the parameter setting module, enabling the forklift control system to operate based on these parameters. The lifting height detection device is used to measure the lifting height of the forks; the lifting weight detection device is used to measure the lifting weight of the forks, i.e., the load on the forks; and the speed detection device is used to monitor the forklift's operating speed. The aforementioned vehicle control module is connected to the aforementioned parameter setting module, lifting height detection device, lifting weight detection device, and speed detection device via signals and is used to receive data detected by the aforementioned parameter setting module, lifting height detection device, lifting weight detection device, and speed detection device. The forklift control system in this embodiment also includes a load judgment module, a height judgment module, and an electric drive control module. The load judgment module is used to determine whether the weight on the lifting weight detection device is within the setting range of the aforementioned parameter setting module. The height judgment module is used to determine whether the lifting height of the lifting device is within the setting range of the aforementioned parameter setting module. The electric drive control module controls the operation of the forklift based on the output data of the aforementioned load judgment module and the aforementioned height judgment module.

[0023] The aforementioned lifting height detection device is a pull-cord encoder. By integrating the pull-cord encoder into the vehicle control system, the lifting height data of the forks can be measured in real time, and the measured data can be transmitted to the vehicle control module. The vehicle control module can then automatically adjust the forklift's operating parameters, such as speed and acceleration, based on the data provided by the pull-cord encoder to adapt to different lifting heights. In other words, it can respond instantly to height changes to prevent tipping or other safety accidents caused by excessive fork lifting.

[0024] The aforementioned lifting weight detection device is a weighing fork. Because the weighing fork integrates a weight sensor, it can measure and transmit the lifting weight data on the forks to the vehicle control module in real time. This ensures that operators can understand the current load on the forks in real time, preventing overloading and reducing equipment damage or safety accidents caused by overloading. The vehicle control module can automatically adjust the forklift's operating parameters, such as speed and lifting height, based on the weight data transmitted by the weighing fork to ensure safety and efficiency. Automated weight monitoring reduces potential errors in operator weight estimation and improves operational accuracy.

[0025] The vehicle control module compares and analyzes the data detected by the lifting height detection device, the lifting weight detection device, and the speed detection device with a pre-set forklift load curve. When the detected data exceeds the allowable range of the load curve, the vehicle control module controls the forklift to decelerate to ensure the forklift's safety during operation. The electric drive control module includes a high-position control module and a low-position control module. When the height judgment module determines that the forklift is in a high position, the electric drive control module executes high-position low-speed operation; when the height judgment module determines that the forklift is in a low position, the electric drive control module executes low-position high-speed operation.

[0026] The aforementioned vehicle control module also includes a data storage unit for storing data from the aforementioned parameter setting module, the aforementioned lifting height detection device, the aforementioned lifting weight detection device, and the aforementioned speed detection device. This data storage unit ensures that all critical operational data is completely recorded, facilitating tracking and analysis. The stored data can be used to analyze forklift usage patterns, optimize operating procedures, and improve efficiency. When a forklift malfunctions, historical data can help quickly pinpoint the cause of the problem, facilitating repair and troubleshooting.

[0027] This embodiment presents a forklift control system based on a load curve graph. Through a parameter setting module, a lifting height detection device, a lifting weight detection device, a speed detection device, and a vehicle control module, it can monitor the forklift's travel speed, fork lifting height, and fork load weight in real time. The vehicle control module can control the forklift in real time based on the above data, that is, control the forklift speed according to different load amounts and load heights, so that the three are linked and the travel speed can reach the corresponding maximum allowable speed. This improves work efficiency while ensuring the safety of the forklift during travel, reduces the probability of forklift rollover or tipping accidents, enhances the user experience, and is conducive to the promotion and application of the above-mentioned forklift control system based on a load curve graph in the field of forklift or lifting equipment technology.

[0028] A forklift control method based on load curve diagram includes the following steps: S1. The lifting height range and load weight range of the forks on the forklift are preset through the above parameter setting module. S2. The lifting height of the forks is detected by the lifting height detection device, the load weight of the forks is detected by the lifting weight detection device, and the running speed of the forklift is detected by the speed detection device. S3. Determine whether the forklift is in a loaded or unloaded state using the load determination module described above. S4. When the load judgment module determines that the forklift is under load, the height judgment module then determines the height of the forks. When the forks are in a high position, the electric drive control module controls the forklift to travel at a low speed in a high position; when the forks are in a low position, the electric drive control module controls the forklift to travel at a high speed in a low position. That is, the current load of the forklift forks is determined, and the forklift's travel speed is adjusted according to the current load. Specifically, when the forklift load gradually increases, the forklift's travel speed is gradually reduced; when the forklift load gradually decreases, the forklift's travel speed is gradually increased.

[0029] S5. When the load judgment module determines that the forklift is unloaded, the height judgment module then determines the height of the forks. When the forks are in a low position, the electric drive control module controls the forklift to travel at high speed in a low position; when the forks are in a high position, the electric drive control module controls the forklift to travel at low speed in a high position. That is, the lifting height of the forklift forks is determined, and the forklift's travel speed is adjusted according to the current lifting height of the forklift forks. Specifically, when the lifting height of the forklift forks gradually increases, the forklift's travel speed gradually decreases; when the lifting height of the forklift forks gradually decreases, the forklift's travel speed gradually increases; when the load or lifting height of the forklift forks reaches its maximum value, the forklift's travel speed is at its lowest to ensure forklift travel safety.

[0030] The forklift control method based on load curve diagram in this embodiment, by applying the forklift control system based on load curve diagram described above, also has the advantage of ensuring the safety of the forklift during use.

[0031] The forklift control system based on the load curve described above can be applied to forklifts, including but not limited to forklifts. By applying the forklift control system based on the load curve described above, the forklift also has the advantages of high safety and high reliability, enhances the user experience, and is conducive to the promotion and application of the forklift in the market.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A forklift control system based on load curve graph, characterized in that: The system includes a parameter setting module, a lifting height detection device, a lifting weight detection device, a speed detection device, and a vehicle control module. The parameter setting module is used to preset the lifting height range and lifting weight range of the forks on the forklift. The lifting height detection device measures the lifting height of the forks, the lifting weight detection device measures the lifting weight of the forks, and the speed detection device monitors the operating speed of the forklift. The vehicle control module is connected to the parameter setting module, the lifting height detection device, the lifting weight detection device, and the speed detection device and receives data detected by these devices. It also includes a load judgment module and a height judgment module. The system includes a load judgment module and an electric drive control module. The load judgment module determines whether the weight on the lifting weight detection device is within the setting range of the parameter setting module. The height judgment module determines whether the lifting height of the lifting height detection device is within the setting range of the parameter setting module. The electric drive control module controls the forklift's operating speed based on the output data of the load judgment module and the height judgment module. When the forklift's fork load gradually increases or the fork lifting height gradually increases, the system control module gradually decreases the forklift's maximum allowable travel speed. When the fork load gradually decreases or the fork lifting height gradually decreases, the system control module gradually increases the forklift's maximum allowable travel speed.

2. The forklift control system based on load curve diagram according to claim 1, characterized in that: The lifting height detection device is a pull-rope encoder, which can obtain the lifting height of the forks in real time and transmit the measured height data to the vehicle control module.

3. A forklift control system based on a load curve diagram according to claim 1, characterized in that: The lifting weight detection device is a weighing fork, which can obtain the lifting weight of the fork in real time and transmit the measured weight data to the vehicle control module.

4. A forklift control system based on a load curve diagram according to claim 1, characterized in that: The vehicle control module compares and analyzes the data detected by the lifting height detection device, the lifting weight detection device, and the speed detection device with a pre-set forklift load curve. When the detected data exceeds the range allowed by the load curve, the vehicle control module controls the forklift to decelerate.

5. A forklift control system based on a load curve diagram according to claim 1, characterized in that: The vehicle control module compares and analyzes the data detected by the lifting height detection device, the lifting weight detection device, and the speed detection device with a pre-set forklift load curve. When the detected data exceeds the range allowed by the load curve, the vehicle control module controls the forklift to stop rising.

6. A forklift control system based on a load curve diagram according to claim 1, characterized in that: The electric drive control module includes a high-position control module and a low-position control module. When the height judgment module determines that it is in a high position, the electric drive control module performs high-position low-speed operation; when the height judgment module determines that it is in a low position, the electric drive control module performs low-position high-speed operation.

7. A forklift control system based on a load curve diagram according to claim 1, characterized in that: The vehicle control module also includes a data storage unit for storing data from the parameter setting module, the lifting height detection device, the lifting weight detection device, and the speed detection device.

8. A forklift control method based on a load curve graph, employing the forklift control system based on a load curve graph as described in claim 1; characterized in that: Includes the following steps: S1. The parameter setting module presets the lifting height range and load weight range of the forks on the forklift. S2. The lifting height detection device detects the lifting height of the forks, the load weight detection device detects the load weight of the forks, and the speed detection device detects the running speed of the forklift. S3. The load judgment module determines whether the forklift is loaded or unloaded. S4. When the load judgment module determines the forklift is loaded, the height judgment module determines the height of the forks. When the forks are in a high position, the electric drive control module controls the forklift to travel at a high position at a low speed; when the forks are in a low position, the electric drive control module controls the forklift to travel at a low position at a high speed. S5. When the load judgment module determines the forklift is unloaded, the height judgment module determines the height of the forks. When the forks are in a low position, the electric drive control module controls the forklift to travel at a low position at a high speed; when the forks are in a high position, the electric drive control module controls the forklift to travel at a high position at a low speed.

9. A forklift, characterized in that: The application includes a forklift control system based on a load curve as described in any one of claims 1 to 7.

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