Region limitation and overspeed alarm system of electric forklift

Abstract

The invention relates to an electric forklift area limitation and overspeed alarm system, which relates to the field of electric forklifts, and comprises a control module for realizing vehicle area limitation and ultrasonic alarm and a power supply module for providing power support, and the control module comprises a controller and an overspeed alarm and area limitation terminal; the overspeed alarm and area limitation terminal is provided with a GPS module used for obtaining position information of a vehicle in real time and a CAN communication module used for carrying out data interaction with the controller, the position information of the vehicle is judged according to the electronic fence virtual boundary set by the cloud platform, and data interaction with the controller is carried out through a CAN communication protocol. Through an intelligent monitoring and alarming mechanism, the safety and management efficiency of the electric forklift are improved, and meanwhile, different working conditions and individual requirements of customers are met.

Description

Technical Field

[0001] The present invention relates to the field of electric forklifts, and in particular to an area restriction and overspeed alarm system for electric forklifts. Background Art

[0002] As an industrial handling vehicle, a forklift is mainly used for loading, unloading, stacking, and short-distance transportation operations of palletized goods. With the rapid development of modern logistics and warehousing industries, forklifts have become indispensable equipment in the field of warehousing logistics. In recent years, electric forklifts have gradually replaced traditional fuel forklifts and become the market mainstream due to their advantages such as environmental protection, low noise, and low maintenance costs.

[0003] However, with the wide application of electric forklifts, the requirements for their safety and intelligence are becoming increasingly prominent. When operating in complex working conditions such as warehouses, factory workshops, and logistics parks, it is often necessary to monitor and limit the speed of the vehicle in real time to avoid safety accidents caused by overspeed or misoperation. In addition, the demand for area management of forklifts by enterprises is also increasing. For example, restricting the operation of forklifts within a specific area to prevent the vehicle from exceeding the preset range, thereby reducing potential safety hazards and management costs.

[0004] The existing dedicated systems for electric forklifts still have the following deficiencies:

[0005] 1. Lack of real-time monitoring function: The existing systems cannot monitor the speed and position information of forklifts in real time, and cannot detect overspeed or area boundary crossing behaviors in a timely manner;

[0006] 2. Unstable signal transmission: The existing systems are vulnerable to electromagnetic interference during signal transmission, resulting in data loss or misjudgment;

[0007] 3. Lack of customization function: The existing systems cannot customize parameters such as alarm thresholds and area boundaries according to customer needs, and have poor adaptability. Summary of the Invention

[0008] The object of the present invention is to provide an area restriction alarm and overspeed alarm system for electric forklifts, which can improve the safety and management efficiency of electric forklifts through an intelligent monitoring and alarm mechanism, and at the same time meet the personalized needs of different working conditions and customers.

[0009] To achieve the above object, the technical solution of the present invention provides an electric forklift area restriction and overspeed alarm system, including a control module for implementing vehicle area restriction and ultrasonic alarm and a power supply module for providing power support. The control module includes a controller and an overspeed alarm and area restriction terminal; the overspeed alarm and area restriction terminal is provided with a GPS module for real-time acquisition of the vehicle's position information and a CAN communication module for data interaction with the controller, determines the vehicle position information according to the virtual boundary of the electronic fence set by the cloud platform, and performs data interaction with the controller through the CAN communication protocol.

[0010] Preferably, the power supply module includes a storage battery as the power source of the system, a fuse for protecting the circuit from damage by overcurrent, and a key switch as the control node of the power supply. The output end of the storage battery is connected to the key switch through the fuse, and the power supply control of the system is realized by inserting and rotating the key switch.

[0011] Preferably, the storage battery is connected to the key switch and the overspeed alarm and area restriction terminal through the fuse. The output end of the key switch is also connected to the overspeed alarm and area restriction terminal. The overspeed alarm and area restriction terminal is divided into constant power before the key and power supply after the key, ensuring that when the vehicle key is not turned on, the GPS module can still upload the vehicle position and speed information to the cloud in real time.

[0012] Preferably, the control module is connected with a speed sensor and a traveling motor. The speed sensor is installed near the traveling motor and is used to monitor the traveling speed of the vehicle in real time and transmit the speed data to the controller.

[0013] Preferably, the traveling motor is used as a power output device, and its rotation speed is adjusted by the controller by controlling the start and stop of the MOS tube and the current output.

[0014] Preferably, the controller capable of receiving and sending CAN signals processes the signals from the speed sensor and the overspeed alarm and area restriction terminal, and adjusts the vehicle operation state by controlling the rotation speed of the traveling motor.

[0015] Preferably, the control module is connected with an overspeed alarm for emitting a sound and light alarm when the vehicle overspeed and an area alarm for emitting a buzzer alarm when the vehicle exceeds the area restriction.

[0016] Preferably, the control module is connected to the overspeed alarm and the area alarm through a relay. The relay is used for circuit isolation and alarm driver to ensure the reliable transmission of the alarm signal.

[0017] Preferably, a twisted pair shielded cable is used for electrical connection to reduce electromagnetic interference and ensure the stability of signal transmission.

[0018] In summary, the present invention includes the following beneficial technical effects:

[0019] The electric forklift area limit alarm and overspeed alarm system of the present invention has remarkable effects in improving the running safety of forklifts. By real-time monitoring the speed and position information of the forklift, the system can timely detect and warn of overspeed or area boundary crossing behaviors, effectively reducing the probability of safety accidents. At the same time, the system supports customizing the maximum vehicle speed for area alarm and the virtual boundary of the electronic fence according to different working conditions and customer requirements, meeting personalized management needs. In addition, the system has a two-stage alarm mechanism, which can trigger an alarm in time when the vehicle exceeds the area limit or overspeed, and automatically adjust the running state of the vehicle (such as reducing speed or stopping) according to the situation, ensuring that the forklift is always in a safe running state.

[0020] In terms of technical performance and user experience, the present invention has obvious advantages. The system adopts the CAN communication protocol and the twisted pair shielded cable design to reduce electromagnetic interference, ensure the stability and reliability of signal transmission, and avoid potential safety hazards caused by signal loss or misjudgment. Through the combination of the GPS module and the cloud platform, the position and speed information of the vehicle can be uploaded in real time, and enterprise managers can remotely monitor and manage the running state of the forklift through the cloud platform. The system also has an independent connection protocol detection function, which can detect the pin connection status of the terminal and the controller when starting up, preventing potential safety hazards caused by abnormal connection or violent removal, and further improving the reliability of the system.

[0021] In addition, the present invention performs well in market adaptability and operation convenience. The system supports aftermarket modification. Customers can add corresponding sensors and terminal devices to the existing electric forklift and dock according to the standard protocol to achieve the functions of area limit and overspeed alarm, reducing the modification cost and complexity. The system is simply designed and easy to operate. Users can easily set parameters through the cloud platform without complex operation procedures, reducing the use threshold. At the same time, the system supports separately turning on the overspeed alarm or area limit function, and can set requirements such as reducing speed and stopping according to needs, adapting to different working conditions and the diverse needs of customers. By reasonably controlling the running speed of the forklift, unnecessary energy consumption is reduced, which is in line with the development trend of energy conservation and environmental protection of electric forklifts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the operation process of an electric forklift area limit and overspeed alarm system of the present invention;

[0023] Figure 2 is a schematic diagram of the electrical principle of an electric forklift area limit and overspeed alarm system of the present invention.

[0024] Reference numerals: 1, storage battery; 2, fuse; 3, key switch; 4, overspeed alarm and area restriction terminal; 5, controller; 6, speed sensor; 7, traveling motor; 8, area alarm; 9, relay; 10, overspeed alarm. Specific embodiments

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] The present invention discloses an area restriction alarm and overspeed alarm system for an electric forklift, which can be divided into a control module and a power module. The power module is responsible for providing power support for the control module, and its core components include a storage battery 1, a fuse 2, and a key switch 3; the control module is the core part of the system, including an overspeed alarm and area restriction terminal 4, a controller 5, a speed sensor 6, a traveling motor 7, an area alarm 8, a relay 9, and an overspeed alarm 10. These components realize the area restriction and overspeed alarm functions of the electric forklift through specific connection relationships and functional designs.

[0027] The storage battery 1, as the power source of the entire system, provides a stable DC power supply for the operation of the electric forklift. Its output terminal is connected to the key switch 3 through the fuse 2, forming the basic structure of the power module. The function of the fuse 2 is to protect the circuit from damage caused by overcurrent, ensuring the safety of the system. The key switch 3 serves as the control node of the power supply, and through the insertion and rotation of the key, realizes the power supply control of the entire system. The output terminal of the key switch 3 is connected to the controller 5 and the overspeed alarm and area restriction terminal 4, providing power support for the control module.

[0028] The controller 5 is the core component of the system, a device that can receive and send CAN signals, process input signals, and send output signals. It is responsible for receiving and processing signals from the speed sensor 6 and the overspeed alarm and area restriction terminal 4, and adjusts the operating state of the vehicle by controlling the rotation speed of the traveling motor 7. The controller 5 conducts data interaction with the overspeed alarm and area restriction terminal 4 through the CAN communication protocol, and real-time monitors the speed and position information of the vehicle. The speed sensor 6 is installed near the traveling motor 7, a device that can output the current vehicle traveling speed information, used to real-time monitor the traveling speed of the vehicle and transmit the speed data to the controller 5. The traveling motor 7, as the power output device, its rotation speed is adjusted by the controller 5 by controlling the start and stop of the MOS tube and the current output through the motor encoder, so as to realize different traveling speeds of the vehicle.

[0029] The overspeed alarm and area limit terminal 4 is an important part of the system. It is a device that can receive and send CAN signals and output digital signals. It integrates a GPS module and a CAN communication module inside. The terminal obtains the vehicle's position information in real time through the GPS module and exchanges data with the controller 5 through the CAN communication protocol. The terminal can determine the vehicle's operating status according to the virtual boundary of the electronic fence and the speed threshold set by the cloud platform, and trigger the alarm or adjust the vehicle's operating status by outputting digital signals. The overspeed alarm 10 is an audible and visual alarm device when the vehicle overspeed, and the area alarm 8 is a buzzer alarm device when exceeding the area limit. The overspeed alarm 10 and the area alarm 8 are respectively used to give audible and visual alarms when the vehicle overspeed or exceeds the area limit, reminding the driver to take corresponding measures. The relay 9 is a device for circuit isolation and alarm driving, used for circuit isolation and alarm driving to ensure the reliable transmission of alarm signals.

[0030] The electrical connection of the system (all facility CAN signal connections) uses twisted pair shielded wires to reduce electromagnetic interference and ensure the stability of signal transmission. The output end of the key switch 3 is connected to the controller 5 and the overspeed alarm and area limit terminal 4. The output end of the controller 5 is connected to the traveling motor 7, the relay 9, and the speed sensor 6. The overspeed alarm and area limit terminal 4 exchanges data with the controller 5 through the CAN communication protocol and uploads the vehicle information to the cloud platform. The cloud platform monitors and determines the vehicle's operating status in real time by setting the virtual boundary of the electronic fence and the speed threshold.

[0031] During the operation of the system, when the vehicle is within the virtual boundary of the electronic fence and the driving speed is lower than the threshold, the system does not send an alarm signal to the controller 5, and the vehicle operates normally. When the vehicle exceeds the virtual boundary of the electronic fence or the driving speed exceeds the threshold, the overspeed alarm and area limit terminal 4 will send a secondary or primary alarm signal to the controller 5 according to the specific situation. After receiving the alarm signal, the controller 5 will control the traveling motor 7 to decelerate or stop operating, and trigger the corresponding alarm to give an audible and visual alarm until the vehicle returns to the safe area or the speed drops below the threshold.

[0032] In addition, the present invention also supports customizing the maximum speed of the area alarm and the virtual boundary of the electronic fence to meet the needs of different working conditions and customers. The system also has an independent connection protocol detection function, which can detect the pin connection status of the overspeed alarm and area limit terminal 4 and the controller 5 when starting up, preventing potential safety hazards caused by abnormal connections or forced removal.

[0033] The design of the present invention not only realizes the overspeed alarm and area restriction functions of the electric forklift, but also ensures the stability of signal transmission and the reliability of the system through the design of CAN communication protocol and twisted pair shielded wire. At the same time, the solution supports aftermarket modification. Customers can add corresponding sensors and terminal equipment to the existing whole machine and connect them according to the standard protocol to realize the overspeed alarm and area restriction functions. This system is simple in design, easy to operate and highly customized, which can effectively improve the safety and management efficiency of electric forklifts.

[0034] The speeding alarm and area restriction terminal 4 is divided into a pre-key power supply and a post-key power supply to ensure that when the vehicle key is not turned on, the GPS module in the speeding alarm and area restriction terminal 4 can still upload the vehicle position and speed information to the cloud in real time. When the key switch 3 is closed, the power module supplies power to the entire speed limit control module, and the speed sensor 6 transmits the vehicle status to the controller 5, and the controller 5 transmits the vehicle status to the speeding alarm and area restriction terminal 4. The speeding alarm and area restriction terminal 4 uploads the vehicle information to the cloud. The cloud determines the vehicle operation status through the set electronic fence virtual boundary and the set speed threshold, and feeds back to the controller 5 to control the vehicle operation status adjustment and alarm response.

[0035] The speeding alarm and area restriction terminal 4 determines the running status of the vehicle as follows:

[0036] 1. When the vehicle is currently running within the virtual boundary of the electronic fence and the vehicle speed is lower than the threshold, the speeding alarm and area restriction terminal 4 does not send speeding and area alarm signals to the controller 5. The controller 5 controls the travel motor 7 to respond according to the set program. The vehicle works normally and the alarm does not sound.

[0037] 2. When the vehicle is currently running outside the virtual boundary of the electronic fence, but the vehicle speed is lower than the threshold, the speeding alarm and area restriction terminal 4 sends a secondary alarm signal to the controller 5 that the vehicle has left the safe area. The controller 5 responds to the secondary alarm signal, controls the travel motor 7 to slow down, and the area alarm 8 sounds an alarm until the vehicle returns to the virtual boundary of the electronic fence and the alarm is lifted. If the alarm signal from the speeding alarm and area restriction terminal 4 is not lifted within 1 minute (adjustable according to demand), the speeding alarm and area restriction terminal 4 sends a primary alarm signal to the controller 5 that the vehicle has left the safe area. The controller 5 responds to the primary alarm signal, controls the travel motor 7 to stop running, and the alarm sounds and lights an alarm. (The alarm definition between the speeding alarm and area restriction terminal 4 and the controller 5 is defined by the CAN communication protocol, where the virtual boundary of the electronic fence can be set by logging into the cloud account, and the interval time for upgrading the secondary alarm to the primary alarm if it is not lifted can be adjusted according to the protocol.)

[0038] 3. When the vehicle is currently running within the virtual boundary of the electronic fence, but the vehicle speed is higher than the threshold, the speeding alarm and area restriction terminal 4 sends a second-level overspeed alarm signal to the controller 5. The controller 5 responds to the second-level alarm signal and controls the travel motor 7 to slow down until the vehicle speed falls below the threshold, and the alarm is lifted. If the alarm signal from the speeding alarm and area restriction terminal 4 is not lifted within 1 minute (adjustable according to demand), the speeding alarm and area restriction terminal 4 sends a first-level overspeed alarm signal to the controller 5. The controller 5 responds to the first-level alarm signal and controls the travel motor 7 to stop running, and the alarm sounds and lights. (The alarm definition between the speeding alarm and area restriction terminal 4 and the controller 5 is defined by the CAN communication protocol, where the speeding threshold can be set by logging into the cloud account, and the interval time for upgrading the second-level alarm to the first-level alarm if it is not lifted can be adjusted according to the protocol.)

[0039] 4. When the vehicle is currently running outside the virtual boundary of the electronic fence, and the vehicle speed is higher than or equal to the threshold, the speeding alarm and area restriction terminal 4 sends a second-level alarm signal of the vehicle leaving the safe area and a second-level alarm signal of overspeeding to the controller 5. The controller 5 responds to the corresponding second-level alarm signal, controls the travel motor 7 to slow down, and the area alarm 8 buzzes to alarm until the vehicle returns to the virtual boundary of the electronic fence and the alarm is lifted. At the same time, the speeding alarm 10 emits an audible and visual alarm to prompt the driver to slow down. If the alarm signal of the speeding alarm and area restriction terminal 4 is not lifted within 1 minute (adjustable according to demand), the speeding alarm and area restriction terminal 4 sends a first-level alarm signal of the vehicle leaving the safe area to the controller 5. The controller 5 responds to the first-level alarm signal, controls the travel motor 7 to stop running, and the alarm sounds and lights an alarm. (The alarm definition between the speeding alarm and area restriction terminal 4 and the controller 5 is defined by the CAN communication protocol, in which the virtual boundary of the electronic fence and the speeding threshold can be set by logging into the cloud account, and the interval time for upgrading the second-level alarm to the first-level alarm if the second-level alarm is not lifted can be adjusted according to the protocol regulations)

[0040] An independent connection protocol is set between the speeding alarm and area restriction terminal 4 and the controller 5. After power-on, the connection status of the pins of the speeding alarm and area restriction terminal 4 and the controller 5 is detected. If an abnormal connection or violent removal is detected, the controller 5 will lock the vehicle.

[0041] In addition to realizing the most basic overspeed alarm and area restriction functions, the present invention can also realize the following functions:

[0042] 1. The regional alarm speed limit of the vehicle can be set, and the maximum speed that meets the requirements can be set according to different working conditions and specific conditions of different factories;

[0043] 2. The virtual boundary of the electronic fence for regional alarm can be set. When the vehicle runs into the limited area, the whole vehicle can respond to the regional alarm;

[0044] 3. The overspeed alarm or area restriction function can be individually turned on according to different working condition requirements. In addition to controlling the alarm, requirements such as speed reduction and parking can also be individually set.

[0045] The design scheme of the overspeed alarm and area restriction for the electric forklift of the present invention solves the current situation that the existing electric forklifts cannot achieve the overspeed alarm and area restriction systems. The scheme is simply designed, and the signal transmission all adopts CAN line transmission, which ensures the stability of the signal. The wiring harness design is simple and the operation is convenient. The parameters can be set by oneself according to the requirements, and other components can also be selected to execute the output to meet the customization requirements. At the same time, the design scheme can meet the requirements of aftermarket modification. On the basis of the existing whole machine, only the corresponding sensors, the overspeed alarm and area restriction terminal 4, and the alarm need to be added and docked according to the standard protocol to achieve the overspeed alarm and area restriction functions.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electric forklift area restriction and overspeed alarm system, characterized in that: The invention comprises a control module for realizing vehicle area restriction and ultrasonic alarm and a power supply module for providing power support, wherein the control module comprises a controller (5) and an overspeed alarm and area restriction terminal (4); the overspeed alarm and area restriction terminal (4) is provided with a GPS module for obtaining vehicle position information in real time and a CAN communication module for performing data interaction with the controller (5), determines vehicle position information according to an electronic fence virtual boundary set by a cloud platform, and performs data interaction with the controller (5) through a CAN communication protocol.

2. The electric forklift area restriction and overspeed alarm system according to claim 1, characterized in that: The power module comprises a storage battery (1) as a power source for the system, a fuse (2) for protecting the circuit from damage caused by overload current, and a key switch (3) as a control node of the power supply. The output end of the storage battery (1) is connected to the key switch (3) through the fuse (2), and the power supply control of the system is realized by inserting and rotating the key switch (3).

3. The electric forklift area restriction and overspeed alarm system according to claim 2, characterized in that: The storage battery (1) is connected to the key switch (3) and the overspeed alarm and area restriction terminal (4) via the fuse (2); the output end of the key switch (3) is also connected to the overspeed alarm and area restriction terminal (4); the overspeed alarm and area restriction terminal (4) is divided into a pre-key power supply and a post-key power supply, so as to ensure that when the vehicle key is not turned on, the GPS module can still upload the vehicle position and speed information to the cloud in real time.

4. The electric forklift area restriction and overspeed alarm system according to claim 1, characterized in that: The control module is connected to a speed sensor (6) and a travel motor (7); the speed sensor (6) is installed near the travel motor (7) and is used to monitor the travel speed of the vehicle in real time and transmit speed data to the controller (5).

5. The electric forklift area restriction and overspeed alarm system according to claim 4, characterized in that: The travel motor (7) serves as a power output device, and its rotation speed is adjusted by the controller (5) by controlling the start and stop of the MOS tube and the current output.

6. The electric forklift area restriction and overspeed alarm system according to claim 5, characterized in that: The controller (5) capable of receiving and sending CAN signals processes signals from the speed sensor (6) and the overspeed alarm and area restriction terminal (4), and adjusts the vehicle running state by controlling the rotation speed of the travel motor (7).

7. The electric forklift area restriction and overspeed alarm system according to claim 1, characterized in that: The control module is connected to an overspeed alarm (10) for issuing an audible and visual alarm when the vehicle exceeds the speed limit, and an area alarm (8) for issuing a buzzer alarm when the vehicle exceeds the area limit.

8. The electric forklift area restriction and overspeed alarm system according to claim 7, characterized in that: The control module is connected to the overspeed alarm (10) and the area alarm (8) via a relay (9), and the relay (9) is used for circuit isolation and alarm driving to ensure reliable transmission of the alarm signal.

9. An electric forklift area restriction and overspeed alarm system according to any one of claims 1 to 8, characterized in that: The electrical connection uses twisted-pair shielded wire to reduce electromagnetic interference and ensure the stability of signal transmission.

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