Electric control system of crane

Abstract

The invention relates to the technical field of crane control, in particular to a crane electric control system which comprises an operation module used for receiving a control instruction of a user and sending the control instruction to a control module; the control module is used for receiving the control instruction, analyzing the control instruction to obtain an operation module needing to be controlled and a corresponding control operation, encoding the corresponding control operation to obtain a corresponding digital signal, and sending the operation module and the digital signal to the connection module; the connection module is used for connecting all the operation modules and converting the digital signals into corresponding current to control the operation modules; the control instruction of the user is directly received through the operation module of the system, so that the user can intuitively operate, and the use difficulty is reduced. A user does not need to directly know working details of the bottom layer operation module and only needs to send a control instruction through the operation module, so that the operation process is greatly simplified, and remote control of the crane is realized.

Description

Technical Field

[0001] The invention relates to the technical field of crane control, in particular to an electric control system for a crane. Background Art

[0002] The existing crane control system is generally composed of a display, a controller and a distribution box. The controller is generally installed in the electric control box and connected to various operating modules in the crane (such as the accelerator pedal, three-color alarm light, work light and solenoid valve, etc.) through wiring harnesses. However, since the electrical components are distributed in different positions of the crane, many and complex wiring harnesses need to be set up, resulting in a complex and costly system, which is difficult for technicians to operate. Summary of the invention

[0003] In view of the above-mentioned defects, an object of the present invention is to provide a crane electronic control system to reduce the complexity of the crane control system.

[0004] To achieve this purpose, the present invention adopts the following technical solution: a crane electric control system, comprising:

[0005] The operation module is used to receive the control instructions from the user and send the control instructions to the control module;

[0006] The control module is used to receive the control instruction, parse the control instruction, obtain the operation module to be controlled and the corresponding control operation, encode the corresponding control operation, obtain the corresponding digital signal, and send the operation module and the digital signal to the connection module;

[0007] The connection module is used to connect all the operation modules and convert the digital signal into the corresponding current to control the operation modules;

[0008] It also includes a power driving module, which is electrically connected to the connection module and the control module respectively;

[0009] The power driving module includes a first driving module, a second driving module and a third driving module;

[0010] The first driving module is used to convert the input AC power into DC power using a rectifier bridge;

[0011] The second driving module is used to filter the rectified DC voltage;

[0012] The third driving module is used to convert the filtered DC voltage waveform into an AC voltage waveform with adjustable frequency, control the switching timing of the IGBT, and achieve the output AC voltage waveform frequency and amplitude.

[0013] Preferably, it further comprises a braking module, wherein the braking module is electrically connected to the power driving module;

[0014] The braking module is used to introduce the feedback current into the braking resistor after receiving the braking current signal.

[0015] Preferably, it comprises an alarm module; the alarm module is electrically connected to the control module;

[0016] The alarm module is used to receive a fault signal and a start signal, and to issue an alarm when receiving the fault signal and the start signal.

[0017] Preferably, it also includes a human-computer interaction module; the human-computer interaction module is electrically connected to the control module;

[0018] The human-machine interaction module obtains the digital signal or fault signal executed by the crane, and displays the digital signal or fault signal on a display.

[0019] Preferably, it further comprises an anti-sway module, wherein the anti-sway module is electrically connected to the control module;

[0020] The anti-sway module is used to reduce the swing of the hook and the load caused by the operation of the crane or the inertial impact of the load.

[0021] Preferably, it further comprises a black box module, wherein the black box module is electrically connected to the control module;

[0022] The black box module is used to monitor and record the operating status of the crane in real time.

[0023] Preferably, it further comprises a Bluetooth module, wherein the Bluetooth module is electrically connected to the control module;

[0024] The Bluetooth module is used to connect to the user's input terminal and feed back the operation status of the crane to the user's input terminal.

[0025] Preferably, it further comprises a data acquisition module, wherein the data acquisition module is electrically connected to the control module;

[0026] The data acquisition module is used to collect digital signals and analog signals fed back by the operation module.

[0027] One of the above technical solutions has the following advantages or beneficial effects: the operation module of the system directly accepts the user's control instructions, so that the user can operate intuitively, reducing the difficulty of use. The user does not need to directly understand the working details of the underlying operation module, but only needs to send control instructions through the operation module, which greatly simplifies the operation process and realizes remote control of the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1 As shown, a crane electronic control system comprises:

[0033] The operation module is used to receive the control instructions from the user and send the control instructions to the control module;

[0034] The control module is used to receive the control instruction, parse the control instruction, obtain the operation module to be controlled and the corresponding control operation, encode the corresponding control operation, obtain the corresponding digital signal, and send the operation module and the digital signal to the connection module;

[0035] The connection module is used to connect all the operation modules and convert the digital signal into the corresponding current to control the operation modules;

[0036] In the present invention, the user's control instructions for the crane can be received through the operation module. For example, the user can manually input control instructions such as start and move in the operation module, and then the operation module will send the control instructions to the control module. The control module stores the codes corresponding to various control instructions. After receiving the control instructions, it will align and parse them, and then pair the corresponding codes to obtain digital signals. Therefore, the control module can support a variety of different control operations, which improves the flexibility of the system. The digital signal can be transported by baseband transmission, and the digital signal is transported to the connection module. The connection module is equivalent to a total management module. The connection module is responsible for connecting all operating modules and ensuring the accurate transmission of digital signals, further enhancing the reliability of the system. The operating module is specifically an external component such as the motor, brake and fan of each operating mechanism of the crane. After receiving the corresponding current, it will perform corresponding actions to realize the operation of the crane.

[0037] The operating module of this system directly accepts the user's control instructions, allowing users to operate intuitively and reducing the difficulty of use. Users do not need to directly understand the working details of the underlying operating module, but only need to send control instructions through the operating module, which greatly simplifies the operation process and realizes remote control of the crane.

[0038] It also includes a power driving module, which is electrically connected to the connection module and the control module respectively;

[0039] The power driving module includes a first driving module, a second driving module and a third driving module;

[0040] The first driving module is used to convert the input AC power into DC power using a rectifier bridge;

[0041] The second driving module is used to filter the rectified DC voltage;

[0042] The third driving module is used to convert the filtered DC voltage waveform into an AC voltage waveform with adjustable frequency, control the switching timing of the IGBT, and achieve the output AC voltage waveform frequency and amplitude.

[0043] In order to better and faster control the operation module, so that the transmitted digital signal can be immediately converted into the corresponding current, so that the connection module directly controls the operation of the operation module, in the present invention, a power drive module is also provided. First, the power drive module converts the corresponding controlled AC power into DC power. Since the DC voltage waveform obtained after rectification usually contains more harmonic components, and some operation modules use electromagnetic relays, when the current contains harmonics, the power harmonics often cause relay protection and malfunction or refusal of automatic devices, which is easy to cause the operation module failure or expand the operation module failure. For this reason, a second drive module is provided to filter the rectified DC voltage to eliminate the harmonics in the DC power. Subsequently, the third drive module can make the output AC voltage waveform closer to the sine wave by accurately controlling the switching timing of the IGBT, further reducing the harmonic content, thereby improving the power quality and protecting the operation module. In addition, by adjusting the frequency and amplitude of the output AC voltage, the precise control of the motor speed and load of the operation module can be achieved.

[0044] Preferably, it further comprises a braking module, wherein the braking module is electrically connected to the power driving module;

[0045] The braking module is used to introduce the feedback current into the braking resistor after receiving the braking current signal.

[0046] The braking module is electrically connected to the power driving module. When a braking digital signal is transmitted to the power driving module, the driving module will control the corresponding current to realize the braking of the crane operation module. When braking is performed, the power corresponding to the operation module will be quickly removed from the shelf, and a braking feedback current will be generated at this time, causing the DC voltage to rise, which will seriously affect the damage to the motor of the operation module. For this reason, a braking module is also provided in the present invention. When the braking module receives the braking current signal from the power driving module, the braking feedback current will be introduced into the braking resistor, and the electrical energy will be converted into heat energy through the braking resistor to be consumed, thereby avoiding voltage fluctuations caused by the feedback of regenerated electrical energy to the power grid, and helping to maintain the smooth operation of the power supply network. At the same time, it can also enable the operation module to use the maximum braking capacity in time without considering the problem of braking feedback current, ensuring that the crane can stop quickly within the set time.

[0047] Preferably, it comprises an alarm module; the alarm module is electrically connected to the control module;

[0048] The alarm module is used to receive a fault signal and a start signal, and to issue an alarm when receiving the fault signal and the start signal.

[0049] When the control module detects a fault or the crane starts to operate, the module will emit a bright red light and a high-decibel alarm sound, reminding the operator and nearby staff to pay attention to the safety of the crane operation area, thus improving the safety of crane operation.

[0050] Preferably, it also includes a human-computer interaction module; the human-computer interaction module is electrically connected to the control module;

[0051] The human-machine interaction module obtains the digital signal or fault signal executed by the crane, and displays the digital signal or fault signal on a display.

[0052] The human-machine interaction module is located on the integrated control panel and is a key input and code output interaction mode. Cranes are special equipment. In order to minimize the impact of human factors on this system, the operation of the human-machine interaction module must be performed by professional maintenance personnel. The human-machine interaction module is equipped with a professional output code manual, and all states can be displayed on the module.

[0053] Preferably, it further comprises an anti-sway module, wherein the anti-sway module is electrically connected to the control module;

[0054] The anti-sway module is used to reduce the swing of the hook and the load caused by the operation of the crane or the inertial impact of the load.

[0055] The anti-sway module is located on the integrated control panel and is responsible for handling the swing of heavy objects that occur during the operation of the crane after the crane lifts the load. The module can significantly reduce the swing of the hook and the load caused by the operation of the trolley or the inertial impact of the load during the operation of the crane. This helps to maintain the stability of the load and reduce safety accidents that may be caused by the swing. The anti-sway module is an existing functional module, and the patent with publication number CN104609304 can be referred to for details.

[0056] Preferably, it further comprises a black box module, wherein the black box module is electrically connected to the control module;

[0057] The black box module is used to monitor and record the operating status of the crane in real time.

[0058] The black box module is located on the integrated control panel and can monitor and record the crane operation status in real time. It can provide operation records, fault checking and troubleshooting solutions for customers who have no network or poor network on site.

[0059] Preferably, it further comprises a Bluetooth module, wherein the Bluetooth module is electrically connected to the control module;

[0060] The Bluetooth module is used to connect to the user's input terminal and feed back the operation status of the crane to the user's input terminal.

[0061] The Bluetooth module is located on the expansion interface of the integrated control board and can be connected to the user's input terminal (mobile phone app). The user maintenance personnel can view the real-time operation status of the crane of this system through the mobile phone app. The Bluetooth module completely solves the pain point that maintenance personnel need to carry a computer on the lifting maintenance platform to the electric control cabinet and connect to the PLC for maintenance, which greatly facilitates maintenance personnel.

[0062] Preferably, it further comprises a data acquisition module, wherein the data acquisition module is electrically connected to the control module;

[0063] The data acquisition module is used to collect digital signals and analog signals fed back by the operation module.

[0064] The module is located on the integrated control board. Through the built-in input module or external sensors and other devices, the module can collect all external signals, including digital signals (such as switch status) and analog signals (such as weight, temperature, etc.). These signals reflect the real-time status of the crane during operation and are the basis for data processing and control of the "control module".

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A crane electronic control system, characterized in that: include: The operation module is used to receive the control instructions from the user and send the control instructions to the control module; The control module is used to receive the control instruction, parse the control instruction, obtain the operation module to be controlled and the corresponding control operation, encode the corresponding control operation, obtain the corresponding digital signal, and send the operation module and the digital signal to the connection module; The connection module is used to connect all the operation modules and convert the digital signal into the corresponding current to control the operation modules; It also includes a power driving module, which is electrically connected to the connection module and the control module respectively; The power driving module includes a first driving module, a second driving module and a third driving module; The first driving module is used to convert the input AC power into DC power using a rectifier bridge; The second driving module is used to filter the rectified DC voltage; The third driving module is used to convert the filtered DC voltage waveform into an AC voltage waveform with adjustable frequency, control the switching timing of the IGBT, and achieve the output AC voltage waveform frequency and amplitude.

2. A crane electronic control system according to claim 1, characterized in that: It also includes a braking module, the braking module is electrically connected to the power driving module; The braking module is used to introduce the feedback current into the braking resistor after receiving the braking current signal.

3. The crane electronic control system according to claim 1, characterized in that: It includes an alarm module; the alarm module is electrically connected to the control module; The alarm module is used to receive a fault signal and a start signal, and to issue an alarm when receiving the fault signal and the start signal.

4. The crane electronic control system according to claim 1, characterized in that: It also includes a human-computer interaction module; the human-computer interaction module is electrically connected to the control module; The human-machine interaction module obtains the digital signal or fault signal executed by the crane, and displays the digital signal or fault signal on a display.

5. The crane electronic control system according to claim 1, characterized in that: It also includes an anti-sway module, the anti-sway module is electrically connected to the control module; The anti-sway module is used to reduce the swing of the hook and the load caused by the operation of the crane or the inertial impact of the load.

6. The crane electronic control system according to claim 1, characterized in that: Also included is a black box module, the black box module is electrically connected to the control module; The black box module is used to monitor and record the operating status of the crane in real time.

7. The crane electronic control system according to claim 1, characterized in that: Also includes a Bluetooth module, the Bluetooth module is electrically connected to the control module; The Bluetooth module is used to connect to the user's input terminal and feed back the operation status of the crane to the user's input terminal.

8. The crane electronic control system according to claim 1, characterized in that: It also includes a data acquisition module, the data acquisition module is electrically connected to the control module; The data acquisition module is used to collect digital signals and analog signals fed back by the operation module.

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