Multifunctional tower crane control device based on LoRa communication

Abstract

The invention discloses a tower crane multifunctional control device based on LoRa communication, the control device comprises a sending end and a receiving end, the sending end comprises a handle control module, a single-chip microcomputer control module, a first LoRa communication module and a first power supply circuit module, the handle control module is connected with the single-chip microcomputer control module, and the first LoRa communication module is connected with the single-chip microcomputer control module. The first LoRa communication module is connected with the single-chip microcomputer control module, the first power supply circuit module is respectively connected with the single-chip microcomputer control module and the first LoRa communication module, the receiving end comprises a second LoRa communication module, a 485 communication isolation module and a second power supply circuit module, the second LoRa communication module is connected with the first LoRa communication module, the second LoRa communication module is connected with the 485 communication isolation module, and the 485 communication isolation module is connected with the second power supply circuit module. And the 485 communication isolation module is connected with the tower crane. According to the invention, by utilizing the characteristics of wide coverage and high bandwidth of the LoRa technology, the functions of remote stable control, real-time monitoring, fault diagnosis, data transmission and the like are realized, and the operation efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tower crane communication, and in particular to a multifunctional tower crane control device based on LoRa communication. Background Art

[0002] With the rapid development of the construction industry, tower cranes are key equipment for high-altitude operations, and their operational safety and efficiency are increasingly valued. Traditional tower crane remote controls mostly use wired or wireless radio frequency technology, which has problems such as signal susceptibility to interference, limited transmission distance, and single function. Existing tower crane remote control systems mostly use traditional radio frequency (RF) or wired connections for control. Although wired connection control is stable, it is difficult to meet the needs of long-distance, high-reliability operation due to its difficult wiring, high cost, and limited by the length of the cable and the harsh construction environment. Traditional radio control is easily interfered in complex environments such as construction sites, has limited transmission distance, and low transmission bandwidth, and cannot achieve remote, highly reliable and stable control. In order to improve the level of intelligence of tower crane operation, the present application provides a multi-function remote control for tower cranes based on LoRa communication. Summary of the invention

[0003] The purpose of the present invention is to provide a multifunctional control device for a tower crane based on LoRa communication in response to the above-mentioned problems, which realizes remote stable control, real-time monitoring, fault diagnosis and data transmission by utilizing the wide coverage and high bandwidth characteristics of LoRa technology, thereby improving operating efficiency and safety.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0005] According to one aspect of the present invention, a multifunctional tower crane control device based on LoRa communication is provided, comprising a transmitting end and a receiving end;

[0006] The transmitting end includes a handle control module, a single-chip control module, a first LoRa communication module and a first power supply circuit module, the handle control module is electrically connected to the single-chip control module, the first LoRa communication module is electrically connected to the single-chip control module, and the first power supply circuit module is electrically connected to the single-chip control module and the first LoRa communication module respectively;

[0007] The handle control module is used to generate a control signal for remotely controlling the tower crane; the single-chip control module is used to receive the control signal and generate a control instruction; the first LoRa communication module is used to remotely transmit the control instruction; the first power supply circuit module is used to provide power for the single-chip control module and the first LoRa communication module;

[0008] The receiving end includes a second LoRa communication module, a 485 communication isolation module and a second power supply circuit module, the second LoRa communication module is communicatively connected to the first LoRa communication module, the second LoRa communication module is electrically connected to the 485 communication isolation module, the 485 communication isolation module is electrically connected to the tower crane, and the second power supply circuit module is electrically connected to the second LoRa communication module and the 485 communication isolation module respectively;

[0009] The second LoRa communication module is used to receive the control instruction; the 485 communication isolation module is used to transmit the control instruction to the tower crane; and the second power supply circuit module is used to provide power for the first LoRa communication module and the 485 communication isolation module.

[0010] Preferably, the handle control module includes a rocker control unit and a button control unit;

[0011] The rocker control unit includes a lifting control rocker and a luffing and slewing control rocker;

[0012] The button control unit includes a start button, an emergency stop button and a bypass button;

[0013] The lifting control rocker, the luffing and slewing control rocker, the start button, the emergency stop button and the bypass button are electrically connected to the single-chip control module respectively.

[0014] Preferably, the single-chip microcomputer control module includes a single-chip microcomputer, and the single-chip microcomputer is electrically connected to the first LoRa communication module.

[0015] Preferably, the first LoRa communication module includes a first LoRa communication chip, and the first LoRa communication chip is electrically connected to the single-chip computer.

[0016] Preferably, the first power supply circuit module includes a first buck chip, an input end of the first buck chip is connected to a 5V DC voltage, and an output end of the first buck chip is electrically connected to the single-chip microcomputer and the first LoRa communication chip, respectively.

[0017] Preferably, it also includes a status indication module, which includes a first LED light, a second LED light, a third LED light, a fourth LED light and a fifth LED light, and the first LED light, the second LED light, the third LED light, the fourth LED light and the fifth LED light are electrically connected to the single chip computer respectively.

[0018] Preferably, an alarm module is further included, the alarm module includes a transistor and a buzzer, the base of the transistor is electrically connected to the single chip computer, and the collector of the transistor is electrically connected to the buzzer.

[0019] Preferably, the second LoRa communication module includes a second LoRa communication chip, and the second LoRa communication chip is electrically connected to the 485 communication isolation module.

[0020] Preferably, the 485 communication isolation module includes a power isolation chip, a signal isolation chip, a 485 conversion chip and an optical coupler, the power isolation chip is electrically connected to the signal isolation chip and the 485 conversion chip respectively, the second LoRa communication chip is electrically connected to the signal isolation chip, the signal isolation chip is electrically connected to the 485 conversion chip, and the 485 conversion chip is electrically connected to the optical coupler.

[0021] Preferably, the second power supply circuit module includes a second buck chip, an input end of the second buck chip is connected to a 5V DC voltage, and an output end of the second buck chip is electrically connected to the second LoRa communication chip.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. The present invention divides the control device into a transmitting end and a receiving end. The transmitting end includes a control handle, and the receiving end is connected to the tower crane. The transmitting end and the receiving end transmit through LoRa, so that the operator can control it in a safe area away from the tower crane. It is particularly suitable for hoisting operations that require multi-angle observation, improves the convenience and safety of operation, ensures signal stability, and the operator can remotely control the tower crane, reducing the demand for high-altitude operations, reducing risks, and reducing dependence on professional high-altitude operators.

[0024] 2. The present invention integrates multiple control functions, including basic operations such as lifting, luffing, and rotation, as well as sound and light alarm functions such as communication abnormality, over-torque, over-weight, and operating failure.

[0025] 3. The present invention realizes seamless connection between the remote controller and the tower crane control system through the 485 bus, improves the operation convenience and response speed, and simplifies the line wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural block diagram of the present invention;

[0027] Figure 2 is a circuit schematic diagram of a rocker control unit of the present invention;

[0028] Figure 3 It is a circuit schematic diagram of a button control unit of the present invention;

[0029] Figure 4 It is a circuit schematic diagram of the single chip microcomputer control module of the present invention;

[0030] Figure 5 It is a circuit schematic diagram of the first LoRa communication module of the present invention;

[0031] Figure 6 is a circuit schematic diagram of a first power supply circuit module of the present invention;

[0032] Figure 7 It is a circuit principle diagram of the status indication module of the present invention;

[0033] Figure 8 It is a circuit schematic diagram of the alarm module of the present invention;

[0034] Fig. 9 It is a circuit principle diagram of the mobile power charging and discharging module of the present invention;

[0035] Fig.10 It is a circuit schematic diagram of the 485 communication isolation module of the present invention;

[0036] Fig.11 It is a structural block diagram of the communication protocol architecture of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the invention, and these aspects of the present invention can be realized even without these specific details.

[0038] See also Figure 1-11 The present invention provides a multifunctional tower crane control device based on LoRa communication, and the technical solution is as follows:

[0039] like Figure 1 As shown, a multifunctional tower crane control device based on LoRa communication includes a transmitter and a control terminal. The transmitter includes a handle control module, a single-chip control module, a first LoRa communication module and a first power supply circuit module. The handle control module, the single-chip control module, the first LoRa communication module and the first power supply circuit module are all integrated on a circuit board to form a remote control transmitter.

[0040] Specifically, Figure 2-3As shown, the handle control module includes a rocker control unit and a button control unit. The rocker control unit includes a lifting control rocker, a variable-luffing and rotating control rocker, a left control key and a right control key. The lifting control rocker, the variable-luffing and rotating control rocker, the left control key and the right control key are electrically connected to the single-chip control module respectively. The lifting control rocker and the variable-luffing and rotating control rocker are sliding resistor structures inside. When the handle is shaken to different positions, there are corresponding different resistance values. The voltage changes caused by different resistance values ​​are taken by the ADC pin of the single-chip computer to convert the specific shaking position information, and then the tower crane control gear information is divided according to different position ranges. The button control unit includes a start button, an emergency stop button and a bypass button. The start button, the emergency stop button and the bypass button are electrically connected to the single-chip control module respectively. The start button, the emergency stop button and the bypass button are start, emergency stop and bypass control buttons respectively, among which the start button is used to complete the tower crane start control, and the button is a self-recovery type. The emergency stop button is used to complete the emergency control of the tower crane, and the self-locking type is adopted according to the emergency stop standard. The bypass button is used to bypass the limit and continue to move when the tower crane encounters a limit and cannot move. By observing that there is still a safe distance in the limit direction of the tower crane, you can press this button to bypass the limit and continue moving.

[0041] like Figure 4 As shown, the single-chip control module includes a single-chip microcomputer, and the single-chip microcomputer adopts the ARM architecture chip STM32F405RGT6 of STMicroelectronics, which is used to complete the signal collection of joysticks, buttons, etc. The single-chip microcomputer has a total of 62 pins. The 26th pin of the single-chip microcomputer is connected to the output end of the lifting control joystick. The 9th pin of the single-chip microcomputer is connected to the variable amplitude output end of the variable amplitude rotation control joystick. The 8th pin of the single-chip microcomputer is connected to the rotation output end of the variable amplitude rotation control joystick. The 10th pin of the single-chip microcomputer is connected to the output end of the left control key. The 36th pin of the single-chip microcomputer is connected to the output end of the right control key. The signals of the lifting control joystick, the variable amplitude rotation control joystick, the left control key and the right control key are collected by the single-chip microcomputer to generate the corresponding control instructions for controlling the tower crane.

[0042] like Figure 5As shown, the first LoRa communication module includes a first LoRa communication chip. The first LoRa communication chip has 44 pins, the 19th pin of the first LoRa communication chip is connected to the 54th pin of the single-chip microcomputer, and the 20th pin of the first LoRa communication chip is connected to the 53rd pin of the single-chip microcomputer. The control signal is collected by the single-chip microcomputer, and the control instruction is generated, and the control instruction is transmitted to the first LoRa communication chip, and the control instruction is transmitted over a long distance using the first LoRa communication chip. The first LoRa communication chip is based on the LoRa spread spectrum modulation technology of SX1262 and adopts the 433.125MHz frequency band. This frequency band has super strong wall penetration and anti-interference capabilities. At the same time, the communication distance can reach 10km, which brings a longer communication distance, and the current is only 2uA in standby mode, with low power consumption, which is very suitable for tower crane operation construction environment.

[0043] like Figure 6 As shown, the first power supply circuit module includes a first buck chip. The first buck chip has 4 pins. The input end of the first buck chip is connected to a 5V DC voltage. The output end of the first buck chip outputs a 3.3V DC voltage. The first buck chip mainly completes the conversion of 5V power supply to 3.3V power supply. The 3.3V power supply is the power supply required by the single-chip microcomputer and the first LoRa communication chip.

[0044] like Figure 7 As shown, in order to increase the functionality of the remote control. In this embodiment, a status indication module is also included. The status indication module includes a first LED light, a second LED light, a third LED light, a fourth LED light, a fifth LED light and a sixth LED light. The first LED light is used to display the 100% torque state and is connected to the 3rd pin of the single-chip microcomputer. The second LED light is used to display the 90% torque state and is connected to the 4th pin of the single-chip microcomputer. The third LED light is used to display the 100% weight state and is connected to the 40th pin of the single-chip microcomputer. The fourth LED light is used to display the 90% weight state and is connected to the 39th pin of the single-chip microcomputer. The fifth LED light is used to display the communication status and is connected to the 2nd pin of the single-chip microcomputer. The sixth LED light is used to display the power supply status of the remote control. The status indicator light is mainly used for LoRa communication abnormalities and remote control power supply status indications and early warning and alarm indications of over-torque, over-weight, etc. of the tower crane.

[0045] like Figure 8 As shown, an alarm module is also included, and the alarm module includes a transistor and a buzzer. The base of the transistor is connected to the 38th pin of the single-chip computer through a resistor R5, the emitter of the transistor is grounded, the collector of the transistor is electrically connected to the cathode of the buzzer, and the positive connection of the buzzer is 3.3V voltage. The buzzer mainly cooperates with the LED indicator to provide a sound alarm output prompt.

[0046] like Fig. 9As shown, the mobile power charging and discharging module is also included. The mobile power charging and discharging module includes a charging and discharging chip, and the model of the charging and discharging chip is Ingenic IP5306. The charging and discharging chip has 8 pins. The charging and discharging chip integrates functions such as boost converter, lithium battery charging management, and battery power indication.

[0047] It also includes a Type-C interface. The Type-C interface is easy to adapt to the charging interface of most chargers on the market and is used as the charging port of the remote control transmitter.

[0048] The receiving end includes a second LoRa communication module, a 485 communication isolation module and a second power supply circuit module. Specifically, the second LoRa communication module includes a second LoRa communication chip, which is connected to the first LoRa communication module for receiving control instructions transmitted by the first LoRa communication module. The second power supply circuit module includes a second step-down chip for providing power. It should be noted that the second LoRa communication module and the second power supply circuit module are similar in structure to the first LoRa communication module and the first power supply circuit module, respectively, and will not be described in detail here.

[0049] like Fig.10 As shown, the 485 communication isolation module includes a power isolation chip, a signal isolation chip, a 485 conversion chip and an optical coupler. The model of the power isolation chip is B0505S-1WR3. The input end of the power isolation chip is connected to a 5V voltage, and the output end of the power isolation chip is respectively connected to the input of the signal isolation chip, the 485 conversion chip and the optical coupler. The model of the signal isolation chip is π122M31. The signal end of the signal isolation chip is connected to the second LoRa communication chip, and the output end of the signal isolation chip is connected to the signal end of the 485 conversion chip. The model of the 485 conversion chip is SP485EEN-L. The control end of the 485 conversion chip is connected to the optical coupler. The output end of the 485 conversion chip is output through the TVS protection circuit and the common mode inductor filter protection circuit, and its output node is connected to the tower crane control system to realize the control of the tower crane.

[0050] It should be noted that the present invention is divided into two parts: a remote control transmitter and a remote control receiver. The remote control transmitter integrates a variety of control functions, including basic operations such as lifting, amplitude change, and rotation, as well as sound and light alarm functions such as communication abnormality, over-torque, overweight, and power supply status. It uses LoRa wireless communication with the remote control receiver, with an operating frequency of 433.125MHz and a maximum communication distance of 10km. It has strong wall penetration ability, strong anti-interference ability, and long communication distance, making it very suitable for complex construction environments of tower crane operations. The remote control receiver only acts as a communication relay gateway, transparently converting the data sent by the remote control transmitter into data in the form of a 485 bus and giving it to the tower crane electrical control system, and the data of the frequency converter can also be given to the remote control receiver through the 485 bus, and then the remote control receiver transmits it to the remote control transmitter to achieve two-way transmission.

[0051] like Fig.11 As shown in the figure, in the design of the communication protocol architecture, modbus_rtu is used as the overall protocol for transmission interaction. As the most widely used industrial communication protocol, modbus_rtu protocol is generally supported by control systems and has good compatibility. The remote control transmitter and the remote control receiver use the modbus_rtu protocol to interact on the LoRa communication transmission layer, and the remote control receiver and the tower crane electronic control system use the modbus_rtu protocol in the form of 485 bus. The remote control transmitter serves as the mudbus host, the tower crane electronic control system is the mudbus slave, and the remote control receiver serves as the communication relay gateway, converting the modbus_rtu protocol in the form of 485 bus to the modbus_rtu protocol in the form of LoRa wireless. In addition, the remote control receiver uses the communication heartbeat mechanism to establish communication protection with the tower crane electronic control system. Once the tower crane electronic control system does not detect communication interaction within 2 seconds, the tower crane immediately enters the stop state and can only be restarted when the communication is normal. All control commands are implemented using the 06 function code in modbus, that is, the write register method is used, and all status reading commands are implemented using the 03 function code in modbus, that is, the read register method is used. Therefore, the remote control transmitter and the tower crane electronic control system must pre-determine the corresponding addresses of the specific control registers and status registers. At the same time, because the remote control receiver and the tower crane electronic control system use the 485 bus form, compared with the traditional IO wiring method, the wiring complexity is greatly simplified, which is conducive to digital control and safer and more reliable control.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multifunctional tower crane control device based on LoRa communication, characterized in that: Includes the sending end and the receiving end; The transmitting end includes a handle control module, a single-chip control module, a first LoRa communication module and a first power supply circuit module, the handle control module is electrically connected to the single-chip control module, the first LoRa communication module is electrically connected to the single-chip control module, and the first power supply circuit module is electrically connected to the single-chip control module and the first LoRa communication module respectively; The handle control module is used to generate a control signal for remotely controlling the tower crane; the single-chip control module is used to receive the control signal and generate a control instruction; the first LoRa communication module is used to remotely transmit the control instruction; the first power supply circuit module is used to provide power for the single-chip control module and the first LoRa communication module; The receiving end includes a second LoRa communication module, a 485 communication isolation module and a second power supply circuit module, the second LoRa communication module is communicatively connected to the first LoRa communication module, the second LoRa communication module is electrically connected to the 485 communication isolation module, the 485 communication isolation module is electrically connected to the tower crane, and the second power supply circuit module is electrically connected to the second LoRa communication module and the 485 communication isolation module respectively; The second LoRa communication module is used to receive the control instruction; the 485 communication isolation module is used to transmit the control instruction to the tower crane; and the second power supply circuit module is used to provide power for the first LoRa communication module and the 485 communication isolation module.

2. A multifunctional tower crane control device based on LoRa communication according to claim 1, characterized in that: The handle control module includes a rocker control unit and a button control unit; The rocker control unit includes a lifting control rocker and a luffing and slewing control rocker; The button control unit includes a start button, an emergency stop button and a bypass button; The lifting control rocker, the luffing and slewing control rocker, the start button, the emergency stop button and the bypass button are electrically connected to the single-chip control module respectively.

3. A multifunctional tower crane control device based on LoRa communication according to claim 2, characterized in that: The single-chip microcomputer control module includes a single-chip microcomputer, and the single-chip microcomputer is electrically connected to the first LoRa communication module.

4. A multifunctional tower crane control device based on LoRa communication according to claim 3, characterized in that: The first LoRa communication module includes a first LoRa communication chip, and the first LoRa communication chip is electrically connected to the single-chip computer.

5. A multifunctional tower crane control device based on LoRa communication according to claim 4, characterized in that: The first power supply circuit module includes a first buck chip, an input end of the first buck chip is connected to a 5V DC voltage, and an output end of the first buck chip is electrically connected to the single-chip microcomputer and the first LoRa communication chip respectively.

6. A multifunctional tower crane control device based on LoRa communication according to claim 3, characterized in that: It also includes a status indication module, which includes a first LED light, a second LED light, a third LED light, a fourth LED light and a fifth LED light, and the first LED light, the second LED light, the third LED light, the fourth LED light and the fifth LED light are electrically connected to the single-chip computer respectively.

7. The multifunctional tower crane control device based on LoRa communication according to claim 3, characterized in that: It also includes an alarm module, which includes a transistor and a buzzer. The base of the transistor is electrically connected to the single-chip computer, and the collector of the transistor is electrically connected to the buzzer.

8. The multifunctional tower crane control device based on LoRa communication according to claim 4, characterized in that: The second LoRa communication module includes a second LoRa communication chip, and the second LoRa communication chip is electrically connected to the 485 communication isolation module.

9. A multifunctional tower crane control device based on LoRa communication according to claim 8, characterized in that: The 485 communication isolation module includes a power isolation chip, a signal isolation chip, a 485 conversion chip and an optical coupler. The power isolation chip is electrically connected to the signal isolation chip and the 485 conversion chip respectively, the second LoRa communication chip is electrically connected to the signal isolation chip, the signal isolation chip is electrically connected to the 485 conversion chip, and the 485 conversion chip is electrically connected to the optical coupler.

10. A multifunctional tower crane control device based on LoRa communication according to claim 9, characterized in that: The second power supply circuit module includes a second buck chip, an input end of the second buck chip is connected to a 5V DC voltage, and an output end of the second buck chip is electrically connected to the second LoRa communication chip.

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