A forklift speed control method and device based on cargo weight

Abstract

This application relates to the field of speed control technology, and discloses a forklift speed control method and device based on cargo weight. The method includes: acquiring the cargo weight detected by a cargo weight sensor and the forklift speed detected in real time by a vehicle speed sensor; calling the maximum preset speed corresponding to the cargo weight and determining whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, controlling the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed; if the forklift speed is less than or equal to the maximum preset speed, maintaining normal forklift operation. When the forklift is speeding, the forklift speed is reduced to the maximum preset speed corresponding to the cargo weight, thereby improving forklift operation efficiency while ensuring safe forklift operation.

Description

Technical Field

[0001] This application relates to the field of speed control technology, and in particular to a forklift speed control method and apparatus based on cargo weight. Background Technology

[0002] Forklifts are vehicles suitable for short-distance cargo handling. However, if a forklift travels at excessive speed, goods can easily fall or tip over, posing a serious hazard. Forklift speed is determined by the engine's maximum RPM and the gearbox ratio. During operation, the driver controls the speed by adjusting the throttle, which is highly subjective and prone to misoperation. Therefore, it is crucial to prevent such incidents.

[0003] Currently, the vehicle has a speed limiting function, but the speed limit cannot be adjusted when picking up goods of different weights, which cannot make the most of the engine performance and results in low forklift operating efficiency.

[0004] Therefore, how to improve the efficiency of forklift operation while ensuring safe operation is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a forklift speed control method and device based on cargo weight, in order to solve the problem that the current vehicle speed limiting function leads to low forklift operation efficiency.

[0006] To address the aforementioned technical problems, this application provides a forklift speed control method based on cargo weight, comprising:

[0007] Acquire the weight of the goods detected by the weight sensor and the forklift speed detected in real time by the speed sensor;

[0008] Call the maximum preset speed corresponding to the weight of the goods, and determine whether the forklift speed is greater than the maximum preset speed;

[0009] If the forklift speed is greater than the maximum preset speed, control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed;

[0010] If the forklift speed is less than or equal to the maximum preset speed, the forklift will continue to operate normally.

[0011] Optionally, before calling the maximum preset speed corresponding to the weight of the goods and determining whether the forklift speed is greater than the maximum preset speed, the method further includes:

[0012] Determine whether the weight of the goods is greater than the preset maximum weight;

[0013] If the weight of the goods exceeds the preset maximum weight, the forklift engine will be protected against speed and torque limiting.

[0014] If the weight of the goods is less than or equal to the preset maximum weight, proceed to the step of calling the maximum preset speed corresponding to the weight of the goods and determining whether the forklift speed is greater than the maximum preset speed.

[0015] Optionally, before the control braking proportional solenoid valve increases the braking pressure of the brake to reduce the forklift speed to the maximum preset speed, it further includes:

[0016] Obtain the accelerator pedal status fed back by the accelerator pedal displacement sensor;

[0017] If the accelerator pedal is in the depressed state, first cut off the control of the accelerator pedal to the engine ECU, and then execute the step of controlling the brake proportional solenoid valve to increase the braking pressure of the brake to reduce the speed of the forklift to the maximum preset speed.

[0018] If the accelerator pedal is in the released state, the step of controlling the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed is entered.

[0019] Optionally, when providing speed and torque limiting protection for the forklift engine, the method further includes:

[0020] Control the overload alarm to issue an alarm notification.

[0021] This application also provides a forklift speed control device based on cargo weight, applied to the forklift speed control method based on cargo weight, including: a vehicle controller, a cargo weight sensor, a vehicle speed sensor, and a braking proportional solenoid valve;

[0022] The cargo weight sensor is installed on the forklift's forks and is used to detect the weight of the cargo on the forks. The vehicle speed sensor is installed on the forklift's drive axle and is used to detect the forklift's speed in real time. The braking proportional solenoid valve is installed at the forklift's brake. The vehicle controller is connected to the cargo weight sensor, the vehicle speed sensor, and the braking proportional solenoid valve, respectively, and is used to call the maximum preset speed corresponding to the cargo weight, and control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed.

[0023] Optionally, it also includes an accelerator pedal displacement sensor connected to the vehicle controller. The accelerator pedal displacement sensor is located at the accelerator pedal of the forklift and is used to detect the accelerator pedal status.

[0024] Optionally, it also includes an overload alarm connected to the vehicle controller, which is used to issue an alarm when the weight of the cargo exceeds a preset maximum weight.

[0025] Optionally, the vehicle controller is built into the dashboard of the forklift.

[0026] This application also provides a forklift speed control device based on cargo weight, including a memory for storing a computer program;

[0027] A processor is configured to implement the steps of the forklift speed control method based on cargo weight when executing the computer program.

[0028] This application provides a forklift speed control method based on cargo weight, comprising: acquiring the cargo weight detected by a cargo weight sensor and the forklift speed detected in real time by a vehicle speed sensor; calling the maximum preset speed corresponding to the cargo weight and determining whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, controlling the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed; if the forklift speed is less than or equal to the maximum preset speed, maintaining normal forklift operation. When the forklift is speeding, the forklift speed is reduced to the maximum preset speed corresponding to the cargo weight, thereby improving forklift operation efficiency while ensuring safe forklift operation.

[0029] The beneficial effects and methods of the forklift speed control device based on cargo weight provided in this application are as described above. Attached Figure Description

[0030] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A structural diagram of a forklift speed control device based on cargo weight provided in an embodiment of this application;

[0032] Figure 2 A flowchart illustrating a first forklift speed control method based on cargo weight, provided for embodiments of this application;

[0033] Figure 3 A flowchart illustrating a second forklift speed control method based on cargo weight, provided in an embodiment of this application;

[0034] Figure 4 A flowchart illustrating a third forklift speed control method based on cargo weight, provided in an embodiment of this application;

[0035] Figure 5A structural diagram of another forklift speed control device based on cargo weight provided in this application embodiment;

[0036] The attached diagram is labeled as follows: 1 is the vehicle controller, 2 is the cargo weight sensor, 3 is the vehicle speed sensor, 4 is the brake proportional solenoid valve, 5 is the accelerator pedal displacement sensor, and 6 is the overload alarm. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0038] The core of this application is to provide a forklift speed control method and device based on cargo weight, which is used to improve forklift operation efficiency while ensuring safe forklift operation.

[0039] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Figure 1 A structural diagram of a forklift speed control device based on cargo weight is provided in an embodiment of this application, as shown below. Figure 1 As shown, the system includes: a vehicle controller 1, a cargo weight sensor 2, a vehicle speed sensor 3, and a brake proportional solenoid valve 4. The cargo weight sensor 2 is mounted on the forklift's forks and is used to detect the weight of the cargo on the forks. The vehicle speed sensor 3 is mounted on the forklift's drive axle and is used to detect the forklift's speed in real time. The brake proportional solenoid valve 4 is located at the forklift's brake. The vehicle controller 1 is connected to the cargo weight sensor 2, the vehicle speed sensor 3, and the brake proportional solenoid valve 4, and is used to call the maximum preset speed corresponding to the cargo weight and control the brake proportional solenoid valve 4 to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed. The vehicle controller 1 is used to implement the steps of the forklift speed control method based on cargo weight described below.

[0041] The vehicle controller 1 of this application embodiment can be built into the forklift's dashboard, thus making full use of space. The cargo weight sensor 2 is installed on the forks. When the forklift picks up cargo, the pressure on the forks reacts to the cargo weight sensor 2, which converts the pressure signal into an electrical signal. The vehicle controller 1 collects this information and processes it to determine the cargo weight. The vehicle speed sensor 3 is installed on the drive axle. It collects the 10-meter pulse count of the helical gear on the main reducer and transmits it to the vehicle controller 1 for post-processing to determine the forklift speed. The vehicle controller 1 is also connected to the Electronic Control Unit (ECU) to control the engine. For example, if the cargo weight exceeds a preset maximum weight, the forklift's engine can be speed-limited and torque-limited for protection.

[0042] Furthermore, it also includes an accelerator pedal displacement sensor 5 connected to the vehicle controller 1. The accelerator pedal displacement sensor 5 is located at the accelerator pedal of the forklift and is used to detect the accelerator pedal status.

[0043] Furthermore, it also includes an overload alarm 6 connected to the vehicle controller 1. The overload alarm 6 is used to issue an alarm when the weight of the goods exceeds a preset maximum weight. This embodiment of the application does not limit the overload alarm 6; the overload alarm 6 includes an indicator light and / or a buzzer. By setting the overload alarm 6, it alerts workers to the current overload, serving a warning function.

[0044] This application provides a forklift speed control device based on cargo weight, comprising: a vehicle controller, a cargo weight sensor, a vehicle speed sensor, and a braking proportional solenoid valve. The cargo weight sensor is mounted on the forklift's forks and is used to detect the weight of the cargo on the forks. The vehicle speed sensor is mounted on the forklift's drive axle and is used to detect the forklift speed in real time. The braking proportional solenoid valve is located at the forklift's brake. The vehicle controller is connected to the cargo weight sensor, the vehicle speed sensor, and the braking proportional solenoid valve, and is used to call the maximum preset speed corresponding to the cargo weight, and control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed. Different cargo weights correspond to different maximum preset speeds. When overspeeding occurs, the forklift speed is reduced to the maximum preset speed corresponding to the cargo weight, thereby improving forklift operating efficiency while ensuring safe forklift operation.

[0045] Based on the above embodiments, Figure 2 A flowchart of the first forklift speed control method based on cargo weight provided in the embodiments of this application is shown below. Figure 2 As shown, the forklift speed control method based on cargo weight includes:

[0046] S10: Acquire the weight of the goods detected by the weight sensor and the forklift speed detected in real time by the speed sensor.

[0047] S11: Call the maximum preset speed corresponding to the weight of the goods, and determine whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, proceed to step S12; if the forklift speed is less than or equal to the maximum preset speed, proceed to step S13.

[0048] S12: Controls the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed;

[0049] S13: Keep the forklift in normal operation.

[0050] Based on practical experience, this application embodiment presets different maximum preset speeds corresponding to different cargo weights, so that the maximum preset speed corresponding to the cargo weight can be called during forklift operation. The maximum preset speed refers to the maximum speed that the forklift can reach while ensuring safe driving under the premise of the cargo weight.

[0051] This application provides a forklift speed control method based on cargo weight, comprising: acquiring the cargo weight detected by a cargo weight sensor and the forklift speed detected in real time by a vehicle speed sensor; calling the maximum preset speed corresponding to the cargo weight and determining whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, controlling the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed; if the forklift speed is less than or equal to the maximum preset speed, maintaining normal forklift operation. When the forklift is speeding, the forklift speed is reduced to the maximum preset speed corresponding to the cargo weight, thereby improving forklift operation efficiency while ensuring safe forklift operation.

[0052] Based on the above embodiments, Figure 3 A flowchart of the second forklift speed control method based on cargo weight provided in the embodiments of this application is shown below. Figure 3 As shown, it includes:

[0053] S20: Acquire the weight of the goods detected by the weight sensor and the forklift speed detected in real time by the speed sensor;

[0054] S21: Determine whether the weight of the goods is greater than the preset maximum weight; if the weight of the goods is greater than the preset maximum weight, proceed to step S22; if the weight of the goods is less than or equal to the preset maximum weight, proceed to step S23.

[0055] S22: Provides speed and torque limiting protection for the forklift engine.

[0056] S23: Call the maximum preset speed corresponding to the weight of the goods, and determine whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, proceed to step S24; if the forklift speed is less than or equal to the maximum preset speed, proceed to step S25.

[0057] S24: Control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed.

[0058] S25: Keep the forklift in normal operation.

[0059] In this embodiment, if the weight of the goods exceeds the preset maximum weight, the engine ECU can be used to limit the engine's speed and torque for protection. Simultaneously, an overload alarm will be activated to issue a warning. Even if the weight of the goods is less than or equal to the preset maximum weight, it is still necessary to further determine whether the current forklift speed meets the requirements to reduce the risk of forklift accidents. The forklift should be kept in normal operation, i.e., the engine should be running normally and the brakes should not be engaged.

[0060] This application prevents overloading by first determining whether the load weight exceeds a preset maximum weight before judging whether the forklift speed exceeds the preset maximum speed. Upon detecting overloading, an alarm is triggered, and engine speed and torque are simultaneously limited to reduce the risk of tire blowouts and extend vehicle lifespan.

[0061] Based on the above embodiments, Figure 4 A flowchart of the third forklift speed control method based on cargo weight provided in the embodiments of this application is shown below. Figure 4 As shown, it includes:

[0062] S30: Acquire the weight of the goods detected by the weight sensor and the forklift speed detected in real time by the speed sensor;

[0063] S31: Determine whether the weight of the goods is greater than the preset maximum weight; if the weight of the goods is greater than the preset maximum weight, proceed to step S32; if the weight of the goods is less than or equal to the preset maximum weight, proceed to step S33.

[0064] S32: Provides speed and torque limiting protection for the forklift engine.

[0065] S33: Call the maximum preset speed corresponding to the weight of the goods, and determine whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, proceed to step S34; if the forklift speed is less than or equal to the maximum preset speed, proceed to step S37.

[0066] S34: Determine the accelerator pedal state; if the accelerator pedal state is depressed, proceed to step S35; if the accelerator pedal state is released, proceed to step S36.

[0067] S35: First, disconnect the accelerator pedal from the engine ECU, and the engine ECU controls the engine speed to decrease to the set value.

[0068] S36: Controls the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed.

[0069] S37: The engine is running normally, the brakes are not engaged, and the forklift continues to move normally.

[0070] This application's embodiment primarily involves acquiring the accelerator pedal state from a accelerator pedal displacement sensor before controlling the brake proportional solenoid valve to increase the brake pressure and reduce the forklift speed to the maximum preset speed. If the accelerator pedal is in a depressed state, the control of the accelerator pedal over the engine ECU is first cut off, and then the brake proportional solenoid valve is controlled to increase the brake pressure and reduce the forklift speed to the maximum preset speed. If the accelerator pedal is in a released state, the brake proportional solenoid valve is directly controlled to increase the brake pressure and reduce the forklift speed to the maximum preset speed. Before reducing the vehicle speed, the accelerator pedal state is determined first. If the accelerator pedal is in a depressed state, the control of the accelerator pedal over the engine ECU is cut off to prevent driver misoperation and reduce safety risks.

[0071] Figure 5 A structural diagram of another forklift speed control device based on cargo weight provided in this application embodiment is shown below. Figure 5 As shown, the speed control device based on cargo weight includes: a memory 40 for storing a computer program;

[0072] The processor 41 is used to execute a computer program to implement the steps of the forklift speed control method based on cargo weight as described in the above embodiments.

[0073] The speed control device based on cargo weight provided in this embodiment may include, but is not limited to, smartphones, tablets, laptops, or desktop computers.

[0074] The processor 41 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 41 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 41 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which is used to handle computational operations related to machine learning.

[0075] The memory 40 may include one or more computer-readable storage media, which may be non-transitory. The memory 40 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 401, which, after being loaded and executed by the processor 41, is capable of implementing the relevant steps of the forklift speed control method based on cargo weight disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 40 may also include an operating system 402 and data 403, and the storage method may be temporary or permanent storage. The operating system 402 may include Windows, Unix, Linux, etc. The data 403 may include, but is not limited to, cargo weight and forklift speed.

[0076] In some embodiments, the speed control device based on cargo weight may further include a display screen 42, an input / output interface 43, a communication interface 44, a power supply 45, and a communication bus 46.

[0077] Those skilled in the art will understand that Figure 5 The structure shown does not constitute a limitation on the speed control device based on cargo weight and may include more or fewer components than shown.

[0078] The speed control device based on cargo weight provided in this application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following methods: acquire the cargo weight detected by the cargo weight sensor and the forklift speed detected in real time by the vehicle speed sensor; call the maximum preset speed corresponding to the cargo weight and determine whether the forklift speed is greater than the maximum preset speed; if the forklift speed is greater than the maximum preset speed, control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed; if the forklift speed is less than or equal to the maximum preset speed, maintain the normal driving of the forklift.

[0079] The foregoing has provided a detailed description of a forklift speed control method and apparatus based on cargo weight provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0080] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A forklift speed control method based on cargo weight, characterized in that, include: Acquire the weight of the goods detected by the weight sensor and the forklift speed detected in real time by the speed sensor; Call the maximum preset speed corresponding to the weight of the goods, and determine whether the forklift speed is greater than the maximum preset speed; If the forklift speed is greater than the maximum preset speed, control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed; If the forklift speed is less than or equal to the maximum preset speed, the forklift will continue to operate normally. Before determining whether the forklift speed is greater than the maximum preset speed corresponding to the weight of the goods, the process further includes: Determine whether the weight of the goods is greater than the preset maximum weight; If the weight of the goods exceeds the preset maximum weight, the forklift engine will be protected against speed and torque limiting. If the weight of the goods is less than or equal to the preset maximum weight, proceed to the step of calling the maximum preset speed corresponding to the weight of the goods and determining whether the forklift speed is greater than the maximum preset speed; The control braking proportional solenoid valve increases the braking pressure of the brake to reduce the forklift speed to the maximum preset speed, and further includes: Obtain the accelerator pedal status fed back by the accelerator pedal displacement sensor; If the accelerator pedal is in the depressed state, first cut off the control of the accelerator pedal to the engine ECU, and then execute the step of controlling the brake proportional solenoid valve to increase the braking pressure of the brake to reduce the speed of the forklift to the maximum preset speed. If the accelerator pedal is in the released state, proceed to the step of increasing the braking pressure of the brake by controlling the braking ratio solenoid valve to reduce the speed of the forklift to the maximum preset speed; The method for providing speed and torque limiting protection for the forklift engine also includes: Control the overload alarm to issue an alarm notification.

2. A forklift speed control device based on cargo weight, characterized in that, The forklift speed control method based on cargo weight as described in claim 1 includes: a vehicle controller, a cargo weight sensor, a vehicle speed sensor, and a braking proportional solenoid valve; The cargo weight sensor is installed on the forklift's forks and is used to detect the weight of the cargo on the forks. The vehicle speed sensor is installed on the forklift's drive axle and is used to detect the forklift's speed in real time. The braking proportional solenoid valve is installed at the forklift's brake. The vehicle controller is connected to the cargo weight sensor, the vehicle speed sensor, and the braking proportional solenoid valve, respectively, and is used to call the maximum preset speed corresponding to the cargo weight, and control the braking proportional solenoid valve to increase the braking pressure of the brake to reduce the forklift speed to the maximum preset speed.

3. The forklift speed control device based on cargo weight according to claim 2, characterized in that, It also includes an accelerator pedal displacement sensor connected to the vehicle controller. The accelerator pedal displacement sensor is located at the accelerator pedal of the forklift and is used to detect the accelerator pedal status.

4. The forklift speed control device based on cargo weight according to claim 2, characterized in that, It also includes an overload alarm connected to the vehicle controller, which is used to issue an alarm when the weight of the cargo exceeds a preset maximum weight.

5. The forklift speed control device based on cargo weight according to claim 2, characterized in that, The vehicle controller is built into the dashboard of the forklift.

6. A forklift speed control device based on cargo weight, characterized in that, Includes memory used to store computer programs; A processor is configured to implement the steps of the forklift speed control method based on cargo weight as described in claim 1 when executing the computer program.

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