阅读说明：本技术 一种基于can总线的塔机变频装置和通讯方法 (Tower crane frequency conversion device based on CAN bus and communication method ) 是由 马孝志 方建飞 楼圣伟 应旦昊 叶志云 于 2020-07-10 设计创作，主要内容包括：一种基于CAN总线的塔机变频装置,联动台、动作模块、电源模块、保护模块以及遥控模块；动作模块包括起升模块、回转模块、变幅模块；所述起升模块、回转模块、变幅模块设置于塔机上；电源模块以及保护模块设置于塔机变频柜体的主控板上,主控板共三块分别对应起升模块、回转模块以及变幅模块；联动台以及三块主控板之间通过CAN总线实现通信；所述遥控模块与联动台连接；主控板上还设置有MCU模块；本发明通过设置CAN总线进行通讯,以及进一步设置CAN隔离电路以及终端电阻,提高通讯效率,保证装置之间通讯的准确、及时。(A tower crane frequency conversion device based on a CAN bus comprises a linkage table, an action module, a power module, a protection module and a remote control module; the action module comprises a lifting module, a rotation module and a variable amplitude module; the lifting module, the rotating module and the amplitude changing module are arranged on the tower crane; the power module and the protection module are arranged on a main control board of a tower crane frequency conversion cabinet body, and the main control board is provided with three blocks which respectively correspond to the lifting module, the rotation module and the amplitude variation module; the linkage table and the three main control boards are communicated through a CAN bus; the remote control module is connected with the linkage table; the main control board is also provided with an MCU module; the invention carries out communication by arranging the CAN bus, and further arranges the CAN isolation circuit and the terminal resistor, thereby improving the communication efficiency and ensuring the accuracy and timeliness of the communication between the devices.)

1. A tower crane frequency conversion device based on a CAN bus is characterized by comprising a linkage table, an action module, a power module, a protection module and a remote control module; the action module comprises a lifting module, a rotation module and a variable amplitude module; the lifting module, the rotating module and the amplitude changing module are arranged on the tower crane; the power module and the protection module are arranged on a main control board of a tower crane frequency conversion cabinet body, and the main control board is provided with three blocks which respectively correspond to the lifting module, the rotation module and the amplitude variation module; the linkage table and the three main control boards are communicated through a CAN bus; the remote control module is connected with the linkage table; the main control board is also provided with an MCU module.

2. The CAN bus-based tower crane frequency conversion device is characterized in that the linkage table comprises a display panel and a remote control plug, the display panel CAN display the working states of a lifting module, a rotation module and a variable amplitude module, and the remote control plug is used for being connected with the remote control module; the remote control module is a bidirectional remote controller and comprises a transmitter and a receiver.

3. The tower crane frequency conversion device based on the CAN bus is characterized in that the CAN bus is provided with a CAN isolation circuit, and the CAN isolation circuit CAN realize information exchange among modules; the CAN isolation circuit comprises an isolation CAN transceiver and a terminal resistor.

4. The tower crane frequency conversion device based on the CAN bus of claim 3, wherein the isolated CAN transceiver is an integrated IC chip TD501 DCAN; the termination resistor is arranged at a pin CANH of the isolated CAN transceiver.

5. The CAN-bus-based tower crane frequency conversion device is characterized in that the power module comprises a switching power supply and a DC-DC power conversion circuit, wherein the DC-DC power conversion circuit converts the voltage output by the switching power supply into standard 5V voltage and 3.3V voltage for output.

6. A CAN bus communication method of a tower crane is characterized by comprising the following steps:

step b 1: electrifying a main control board of the tower crane frequency conversion cabinet body;

step b 2: the CAN bus equipment starts to operate; the CAN bus equipment comprises a CAN bus and a CAN isolation circuit;

step b 3: the equipment connected on the CAN bus sends data to the CAN bus at regular time; the equipment connected on the CAN bus comprises a black box, a linkage table, a vortex plate and three main control plates;

step b 4: the black box, the linkage table, the vortex plate and the three main control plates automatically download required communication information from the CAN bus.

7. The CAN bus communication method of the tower crane according to claim 6, wherein the communication between the remote control module and the linkage table specifically comprises the following steps:

step c 1: the linkage station sends the equipment state information to the remote controller receiver through the CAN bus at intervals of set time t;

step c 2: the receiver converts the data into wireless data after receiving the data and sends the wireless data to the transmitter;

step c 3: the transmitter receives data and displays the data on a display panel of the linkage table;

step c 4: the transmitter sends the state information of the operating rod and the switch on the transmitter to the receiver at set time t';

step c 5: the receiver converts the data into CAN bus data after receiving the data and transmits the CAN bus data to the linkage bedplate through a CAN bus;

step c 6: and the linkage bedplate analyzes the control command and executes corresponding action.

Technical Field

The invention relates to the field of tower cranes, in particular to a tower crane frequency conversion device and a communication method based on a CAN bus.

Background

At present, with the continuous promotion of industrialization and modernization processes, the height requirement of floor construction is higher and higher. When a high-rise building is built, the help of the tower crane is not reduced. Tower cranes, i.e. tower cranes, are commonly used for the transport of construction materials. The tower crane generally comprises three modules of lifting, rotating and amplitude changing, and the three modules are mutually matched to achieve the purpose of conveying goods to a specified place. The point-to-point reciprocating operation in the tower crane industry is a common operation mode, and in order to realize the point-to-point operation control, the cooperation among three modules is needed, so that control boards in the three modules are needed to realize corresponding actions according to respective control instructions. At present, the tower crane control system separates three mechanisms and independently controls the three mechanisms through respective control devices, the three control modules are independent from each other and are not connected with each other, so that the overall size of the control modules is increased, the cost and the overhauling difficulty of equipment are improved, and high intelligent control cannot be realized.

On the other hand, because the distance between tower crane devices is long, the conditions of low signal transmission speed and untimely response easily occur, and therefore a communication connection mode with strong communication real-time performance is required.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a tower crane frequency conversion device and a communication method based on a CAN bus, which are simple in structure and convenient to use.

A tower crane frequency conversion device based on a CAN bus comprises a linkage table, an action module, a power module, a protection module and a remote control module; the action module comprises a lifting module, a rotation module and a variable amplitude module; the lifting module, the rotating module and the amplitude changing module are arranged on the tower crane; the power module and the protection module are arranged on a main control board of a tower crane frequency conversion cabinet body, and the main control board is provided with three blocks which respectively correspond to the lifting module, the rotation module and the amplitude variation module; the linkage table and the three main control boards are communicated through a CAN bus; the remote control module is connected with the linkage table; the main control board is also provided with an MCU module.

Further, the linkage table comprises a display panel and a remote control plug, the display panel can display the working states of the lifting module, the rotating module and the amplitude variation module, and the remote control plug is used for being connected with the remote control module; the remote control module is a bidirectional remote controller and comprises a transmitter and a receiver.

Furthermore, the CAN bus is provided with a CAN isolation circuit which CAN realize information exchange among the modules; the CAN isolation circuit comprises an isolation CAN transceiver and a terminal resistor.

Further, the isolated CAN transceiver is an integrated IC chip TD501 DCAN; and the terminal resistor is arranged on a pin CANH of the isolated CAN transceiver.

Further, the power module comprises a switching power supply and a DC-DC power conversion circuit, wherein the DC-DC power conversion circuit converts the voltage output by the switching power supply into standard 5V voltage and 3.3V voltage for output.

A CAN bus communication method of a tower crane comprises the following steps:

step b 1: electrifying a main control board of the tower crane frequency conversion cabinet body;

step b 2: the CAN bus equipment starts to operate; the CAN bus equipment comprises a CAN bus and a CAN isolation circuit;

step b 3: the equipment connected on the CAN bus sends data to the CAN bus at regular time; the equipment connected on the CAN bus comprises a black box, a linkage table, a vortex plate, three main control plates and a remote control module;

step b 4: the system comprises a black box, a linkage table, a vortex plate, three main control plates and a remote control module, wherein the three main control plates and the remote control module automatically download required communication information from a CAN bus.

Further, the communication between the remote control module and the linkage table specifically comprises the following steps:

step c 1: the linkage station sends the equipment state information to the remote controller receiver through the CAN bus at intervals of set time t;

step c 2: the receiver converts the data into wireless data after receiving the data and sends the wireless data to the transmitter;

step c 3: the transmitter receives data and displays the data on a display panel of the linkage table;

step c 4: the transmitter sends the state information of the operating rod and the switch on the transmitter to the receiver at set time t';

step c 5: the receiver converts the data into CAN bus data after receiving the data and transmits the CAN bus data to the linkage bedplate through a CAN bus;

step c 6: and the linkage bedplate analyzes the control command and executes corresponding action.

The invention has the beneficial effects that:

according to the invention, the CAN bus is arranged for communication, and the CAN isolation circuit and the terminal resistor are further arranged, so that the communication efficiency is improved, and the communication between the devices is accurate and timely;

according to the invention, the switching power supply and the DC-DC power supply conversion circuit are arranged, so that the conversion of the power supply is realized, and each part of modules on the device can work normally and stably;

according to the invention, the equipment is set to transmit data to the CAN bus and download data at regular time, so that data congestion is avoided, and timely update of the data is ensured.

Drawings

FIG. 1 is a schematic view of the general structure of the present invention;

FIG. 2 is a schematic diagram of an MCU module of the present invention;

FIG. 3 illustrates a DC-DC power conversion circuit of the present invention;

FIG. 4 is a CAN isolation circuit of the present invention;

FIG. 5 is a functional selection circuit of the present invention;

FIG. 6 is an indicating circuit of the present invention;

FIG. 7 is a feedback circuit of the signal ES1 according to the present invention;

FIG. 8 is an encoder connector terminal of the present invention;

FIG. 9 is a stopper connecting terminal of the present invention;

FIG. 10 is a voltage sampling circuit of the present invention;

FIG. 11 is a temperature sampling circuit of the present invention;

FIG. 12 is a current sampling circuit of the present invention;

FIG. 13 is a diagram of the inverter unit connection terminal of the present invention;

FIG. 14 is an inverter circuit of the present invention;

FIG. 15 shows a first contactor control circuit of the present invention;

FIG. 16 shows a second contactor control circuit according to the present invention;

FIG. 17 is a first set of limited current circuits of the present invention;

FIG. 18 is a second set of current limiting circuits of the present invention;

FIG. 19 is a current comparison circuit of the present invention;

FIG. 20 shows a voltage regulator circuit according to the present invention;

FIG. 21 is a brake control circuit of the present invention;

FIG. 22 is a voltage comparison circuit of the present invention;

FIG. 23 is a flowchart of a second embodiment of the present invention;

FIG. 24 is a flow chart of a third embodiment of the present invention;

FIG. 25 is a flowchart of a fourth embodiment of the present invention.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.