Multifunctional tower crane remote controller based on LoRa communication

Abstract

The utility model discloses a tower crane multifunctional remote controller based on LoRa communication, the remote controller 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 receiving end. 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 utility model, 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 working efficiency and the safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tower crane communication technical field especially relates to a tower crane multifunctional remote controller based on LoRa communication. BACKGROUND

[0002] With the rapid development of the construction industry, as the key equipment of high-altitude operation, the operation safety and efficiency of tower crane are increasingly valued. The traditional tower crane remote controller mostly adopts wired or wireless radio frequency technology, which has problems such as signal interference, limited transmission distance, single function, etc. The existing tower crane remote control system mostly adopts traditional radio frequency (RF) or wired connection for control. Although the wired connection control is stable, it is difficult to meet the needs of long-distance and high-reliability operation due to wiring difficulty, high cost, and limitation of cable length and harsh construction environment. The traditional wireless radio control is prone to interference in complex environments such as construction sites, has limited transmission distance, low transmission bandwidth, and cannot realize remote and high-reliability stable control. To improve the intelligent level of tower crane operation, the present application provides a tower crane multifunctional remote controller based on LoRa communication. SUMMARY

[0003] The utility model aims at: in view of the above -mentioned problem, provide a kind of tower crane multifunctional remote controller based on LoRa communication, by utilizing the wide coverage, high bandwidth characteristics of LoRa technology, realize remote stable control, real-time monitoring, fault diagnosis and data transmission etc. Function, improve operating efficiency and safety.

[0004] To achieve the above-mentioned utility model purposes, the technical scheme adopted by the utility model is as follows:

[0005] According to one aspect of the present application, a tower crane multifunctional remote controller based on LoRa communication is provided, comprising a sending end and a receiving end.

[0006] The sending end includes 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 electrically connected with the single-chip microcomputer control module, the first LoRa communication module is electrically connected with the single-chip microcomputer control module, and the first power supply circuit module is electrically connected with the single-chip microcomputer control module and the first LoRa communication module respectively.

[0007] The handle control module is used for generating control signals for remotely controlling the tower crane; the single-chip microcomputer control module is used for receiving the control signals and generating control instructions; the first LoRa communication module is used for remotely transmitting the control instructions; and the first power supply circuit module is used for providing power supply for the single-chip microcomputer control module and the first LoRa communication module.

[0008] 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 in communication connection with the first LoRa communication module, the second LoRa communication module is in electrical connection with the 485 communication isolation module, the 485 communication isolation module is in electrical connection with the tower crane, and the second power supply circuit module is in electrical connection with the second LoRa communication module and the 485 communication isolation module respectively.

[0009] The second LoRa communication module is used for receiving the control instruction, the 485 communication isolation module is used for transmitting the control instruction to the tower crane, and the second power supply circuit module is used for providing power supply for the first LoRa communication module and the 485 communication isolation module.

[0010] Preferably, the handle control module comprises a rocker control unit and a button control unit.

[0011] The rocker control unit comprises a hoisting control rocker and an amplitude rotation control rocker.

[0012] The button control unit comprises a start button, an emergency stop button and a bypass button.

[0013] The hoisting control rocker, the amplitude rotation control rocker, the start button, the emergency stop button and the bypass button are in electrical connection with the single-chip microcomputer control module respectively.

[0014] Preferably, the single-chip microcomputer control module comprises a single-chip microcomputer, and the single-chip microcomputer is in electrical connection with the first LoRa communication module.

[0015] Preferably, the first LoRa communication module comprises a first LoRa communication chip, and the first LoRa communication chip is in electrical connection with the single-chip microcomputer.

[0016] Preferably, the first power supply circuit module comprises a first voltage reduction chip, an input end of the first voltage reduction chip is connected with a 5V direct current voltage, and output ends of the first voltage reduction chip are in electrical connection with the single-chip microcomputer and the first LoRa communication chip respectively.

[0017] Preferably, the state indication module comprises a first LED lamp, a second LED lamp, a third LED lamp, a fourth LED lamp and a fifth LED lamp, and the first LED lamp, the second LED lamp, the third LED lamp, the fourth LED lamp and the fifth LED lamp are in electrical connection with the single-chip microcomputer respectively.

[0018] Preferably, the alarm module comprises a triode and a buzzer, a base of the triode is in electrical connection with the single-chip microcomputer, and a collector of the triode is in electrical connection with the buzzer.

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

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

[0021] Preferably, the second power supply circuit module comprises a second voltage reduction chip, an input end of the second voltage reduction chip is connected with a 5V direct current voltage, and an output end of the second voltage reduction chip is electrically connected with the second LoRa communication chip.

[0022] As the above technical scheme is adopted, the present application has the following beneficial effects:

[0023] 1. The remote controller is divided into a sending end and a receiving end in the present application, the sending end comprises a control handle, the receiving end is connected with the tower crane, and the sending end and the receiving end are transmitted through LoRa, so that the operator can control in a safe area far away from the tower crane, which is especially suitable for hoisting operation requiring multi-angle observation, improves the convenience and safety of operation, ensures signal stability, and enables the operator to remotely control the tower crane, reduces the demand for high-altitude operation, reduces risks, and reduces the dependence on professional high-altitude operation personnel.

[0024] 2. The present application integrates various control functions, including basic operations such as lifting, amplitude changing and rotating, and sound and light alarm functions such as communication exception, over-torque, over-weight and operation failure.

[0025] 3. The present application realizes seamless docking of the remote controller and the tower crane control system through the 485 bus, improves operation convenience and response speed, and simplifies circuit wiring. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0028] Figure 3 is a circuit principle diagram of the button control unit of the present application;

[0029] Figure 4The circuit principle diagram of the single-chip microcomputer control module of the utility model;

[0030] Figure 5 The circuit principle diagram of the first LoRa communication module of the utility model;

[0031] Figure 6 The circuit principle diagram of the first power supply circuit module of the utility model;

[0032] Figure 7 The circuit principle diagram of the state indication module of the utility model;

[0033] Figure 8 The circuit principle diagram of the alarm module of the utility model;

[0034] Figure 9 The circuit principle diagram of the mobile power charging and discharging module of the utility model;

[0035] Figure 10 The circuit principle diagram of the 485 communication isolation module of the utility model;

[0036] Figure 11 The structure block diagram of the communication protocol architecture of the utility model. Specific implementation

[0037] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below by referring to the drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the reader to have a thorough understanding of one or more aspects of the utility model, and the aspects of the utility model can be realized even without these specific details.

[0038] Please refer to Figures 1-11 The utility model provides a tower crane multifunctional remote controller based on LoRa communication, and the technical scheme is as follows:

[0039] As Figure 1 shown, a tower crane multifunctional remote controller based on LoRa communication includes a sending end and a control end. The sending end includes 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, the single-chip microcomputer control module, the first LoRa communication module and the first power supply circuit module are all integrated on a circuit board, thereby forming the remote controller sending end.

[0040] Specifically, as Figures 2-3As shown, the handle control module includes a rocker control unit and a button control unit. The rocker control unit includes a hoisting control rocker, an amplitude rotation control rocker, a left control key and a right control key. The hoisting control rocker, the amplitude rotation control rocker, the left control key and the right control key are respectively electrically connected with the single-chip microcomputer control module. The hoisting control rocker and the amplitude rotation control rocker are internally of a sliding resistance structure, and have different resistance values corresponding to different positions when the handle is shaken. The voltage change caused by the different resistance values is taken by the ADC pin of the single-chip microcomputer, so that the position information of the specific shaking can be calculated, 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 respectively electrically connected with the single-chip microcomputer control module. The start button, the emergency stop button and the bypass button are respectively start, emergency stop and bypass control buttons, wherein the start button is used for completing the start control of the tower crane and is of a self-recovery type. The emergency stop button is used for completing the emergency control of the tower crane, and is of a self-locking type according to the emergency stop standard. The bypass button is used for completing the bypass of the limit when the tower crane cannot act due to the limit, and the limit direction is observed to have a safe distance, so that the button can be pressed to bypass the limit to continue to move.

[0041] As shown in Figure 4 , the single-chip microcomputer control module includes a single-chip microcomputer, which is an ARM architecture chip STM32F405RGT6 of the STMicroelectronics Company and is used for completing the signal collection of the rockers and the buttons. The single-chip microcomputer has a total of 62 pins. The 26th pin of the single-chip microcomputer is connected with the output end of the hoisting control rocker. The 9th pin of the single-chip microcomputer is connected with the amplitude output end of the amplitude rotation control rocker. The 8th pin of the single-chip microcomputer is connected with the rotation output end of the amplitude rotation control rocker. The 10th pin of the single-chip microcomputer is connected with the output end of the left control key. The 36th pin of the single-chip microcomputer is connected with the output end of the right control key. The signals of the hoisting control rocker, the amplitude rotation control rocker, the left control key and the right control key are collected by the single-chip microcomputer to generate the control instructions corresponding to the control of the tower crane.

[0042] As shown in 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 single-chip microcomputer collects the control signal and generates a control instruction, which is transmitted to the first LoRa communication chip, and the control instruction is transmitted by the first LoRa communication chip. The first LoRa communication chip is based on the LoRa spread spectrum modulation technology of SX1262, uses a 433.125MHz frequency band, which has strong wall-penetrating ability and anti-interference ability, and the communication distance can reach 10km, which brings a longer communication distance, and the current is only 2uA in standby mode, which has low power consumption and is very suitable for tower operation construction environment.

[0043] As shown in Figure 6 , the first power supply circuit module includes a first step-down chip. The first step-down chip has 4 pins. The input end of the first step-down chip is connected to a 5V direct current voltage. The output end of the first step-down chip outputs a 3.3V direct current voltage. The first step-down chip mainly converts a 5V power supply to a 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] As shown in Figure 7 , in order to increase the functionality of the remote controller, in this embodiment, a state indication module is further included. The state indication module includes a first LED lamp, a second LED lamp, a third LED lamp, a fourth LED lamp, a fifth LED lamp and a sixth LED lamp. The first LED lamp is used to display a 100% torque state and is connected to the 3rd pin of the single-chip microcomputer. The second LED lamp is used to display a 90% torque state and is connected to the 4th pin of the single-chip microcomputer. The third LED lamp is used to display a 100% weight state and is connected to the 40th pin of the single-chip microcomputer. The fourth LED lamp is used to display a 90% weight state and is connected to the 39th pin of the single-chip microcomputer. The fifth LED lamp is used to display a communication state and is connected to the 2nd pin of the single-chip microcomputer. The sixth LED lamp is used to display a remote controller power supply state. The state indication lamp is mainly used for LoRa communication exception and remote controller power supply state indication, and warning and alarm indication of tower over-torque and over-weight.

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

[0046] As shown in Figure 9As shown, the mobile power supply also includes a charging and discharging module. This module includes an Ingenic IP5306 charging and discharging chip. The chip has eight pins and integrates functions such as a boost converter, lithium battery charge management, and battery level indicator.

[0047] It also includes a Type-C interface. The Type-C interface is easily compatible with 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 communicatively connected to the first LoRa communication module to receive 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 elaborated here.

[0049] like Figure 10 As shown, the 485 communication isolation module includes a power isolation chip, a signal isolation chip, a 485 conversion chip, and an optocoupler. The power isolation chip model is B0505S-1WR3. The input of the power isolation chip is connected to a 5V voltage, and the output of the power isolation chip is connected to the inputs of the signal isolation chip, the 485 conversion chip, and the optocoupler, respectively. The signal isolation chip model is π122M31. The signal terminal of the signal isolation chip is connected to the second LoRa communication chip, and the output of the signal isolation chip is connected to the signal terminal of the 485 conversion chip. The 485 conversion chip model is SP485EEN-L. The control terminal of the 485 conversion chip is connected to the optocoupler. The output of the 485 conversion chip is protected by a TVS circuit and a common-mode inductor filter circuit. Its output node is connected to the tower crane control system to achieve control of the tower crane.

[0050] It needs to be explained that the utility model divides into remote controller sending end, remote controller receiving end two parts. Among them, the remote controller sending end integrates multiple control functions, including basic operations such as lifting, amplitude, rotation, and sound and light alarm functions such as communication exception, over torque, over weight, power state, and the remote controller receiving end adopts LoRa wireless communication mode, the working frequency is 433.125MHz, the communication distance can be up to 10km at most, has strong wall penetration ability, strong anti-interference ability, long communication distance, makes it very suitable for tower crane operation complex construction environment. And the remote controller receiving end only acts as a communication relay gateway role, and the data sent by the remote controller sending end is transparently converted into the data in the form of 485 bus to the tower crane electric control system, and the data of the frequency converter can also be given to the remote controller receiving end through the 485 bus, and then transmitted to the remote controller sending end by the remote controller receiving end, realizing bidirectional transmission.

[0051] As shown in Figure 11 In the communication protocol architecture design, modbus_rtu is used as the transmission interaction protocol. As the most widely used industrial communication protocol at present, modbus_rtu is supported by the control system and has good compatibility. The remote controller sending end and the remote controller receiving end interact with each other using modbus_rtu protocol on the LoRa communication transmission layer, and the remote controller receiving end and the tower crane electric control system use modbus_rtu protocol in the form of 485 bus. The remote controller sending end acts as mudbus master, the tower crane electric control system acts as mudbus slave, and the remote controller receiving end acts as communication relay gateway, which converts modbus_rtu protocol in the form of 485 bus into modbus_rtu protocol in the form of LoRa wireless. And the remote controller receiving end uses communication heartbeat mechanism to establish communication protection with the tower crane electric control system. Once the tower crane electric control system does not detect communication interaction within 2 seconds, the tower crane immediately enters the stop state until the communication is normal and can be restarted. All control commands use 06 function code in modbus, that is, write register mode, and all state reading commands use 03 function code in modbus, that is, read register mode. Therefore, the remote controller sending end and the tower crane electric control system must predefine the corresponding address of the specific control register and the state register, and because the remote controller receiving end and the tower crane electric control system use 485 bus, compared with the traditional IO wiring mode, the wiring complexity is greatly simplified, which is beneficial to digital control and makes the control safer and more reliable.

[0052] The above only describes the preferred embodiments of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements should also be considered as the protection scope of the utility model.

Claims

1. A multifunctional remote control for tower crane based on LoRa communication, characterized in that: Including 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 instructions; the 485 communication isolation module is used to transmit the control instructions 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 remote controller for tower crane 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. The multifunctional remote controller for tower crane 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. The multifunctional remote controller for tower crane 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 microcomputer.

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

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

7. The multifunctional remote controller for tower crane 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 remote controller for tower crane 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. The multifunctional remote controller for tower crane 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. The multifunctional remote controller for tower crane 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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