CN115430897B - Bus type digital arc voltage regulator and control system and processing method thereof - Google Patents
Bus type digital arc voltage regulator and control system and processing method thereof Download PDFInfo
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- CN115430897B CN115430897B CN202211390400.9A CN202211390400A CN115430897B CN 115430897 B CN115430897 B CN 115430897B CN 202211390400 A CN202211390400 A CN 202211390400A CN 115430897 B CN115430897 B CN 115430897B
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
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Abstract
The invention provides a bus type digital arc voltage heightening device, which is applied to the technical field of plasma cutting and used for measuring a voltage value between a cutting torch and a workpiece to be cut and adjusting the cutting height of the cutting torch in real time. Based on above-mentioned increaser, this application provides an increaser control system for control increaser work, control system includes hardware layer, equipment driver layer, system software layer and application software layer from bottom to top in proper order, can realize the purpose that the increaser wiring is succinct, functional strong, the security is high.
Description
Technical Field
The invention belongs to the technical field of plasma cutting, and particularly relates to a bus type digital arc voltage regulator, a control system thereof and a processing method thereof.
Background
Plasma arc cutting is a processing method in which the heat of a high-temperature plasma arc is used to locally melt (and evaporate) metal at the cut of a workpiece to be cut, and the molten metal is removed by the momentum of high-speed plasma gas to form the cut.
During plasma cutting, in order to ensure the cutting quality and the service life of the cutting nozzle, the proper height is required to be kept between the cutting nozzle and the steel plate during arc striking and punching, and the arc voltage regulator has the function of measuring the voltage value between the cutting torch and the steel plate during arc striking and cutting and regulating the cutting height of the plasma cutting torch in real time according to the measured voltage value.
At present, most existing plasma arc voltage regulators are connected with a cutting numerical control system through IO wiring, and the traditional wiring mode has the problems of complex wiring, single function, complex electrical control logic, inconvenient debugging of the regulators, inconvenient modification of parameters and processes and the like when multiple regulators are combined. In addition, the common arc voltage heightening device commonly used in the market at present has weak anti-interference performance, and in the special occasion of plasma cutting, the electromagnetic interference generated by high frequency and high voltage is common, so that the acquisition of a numerical control system signal and the panel display can be possibly interfered, and even a hardware circuit can be damaged in serious conditions, so that great hidden danger exists.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a bus-type digital arc voltage regulator, and a control system and a processing method thereof:
a bus-type digital arc voltage regulator for measuring the voltage between cutting torch and workpiece to be cut and regulating the cutting height of cutting torch in real time according to the voltage value is composed of bus interface and conventional interface including at least
The second interface is respectively coupled with the lifting motor, the limit switch and the direct-current switch power supply interface;
the third interface is coupled with an external arc starting relay and a cutting torch positioning proximity switch on the cutting torch;
the fourth interface is coupled with the voltage division plate, the voltage division plate is electrically connected with a plasma power supply, a plasma arcing interface of the plasma power supply is electrically connected with an external arcing relay, and the external arcing relay is coupled with the third interface; the pressure dividing plate is also connected with a protective cap on the cutting torch and used for collision detection of the plasma cutting torch;
a sixth interface coupled to the stepper motor driver;
the bus interface comprises a fifth interface coupled with the operation panel, and a CNC numerical control system is further connected to a circuit between the fifth interface and the operation panel.
In order to realize the bus communication of the height adjuster, the bus interface comprises a CAN bus or a Modbus, and the CAN bus and the Modbus are used for the communication of the height adjuster.
In order to perfect the function of the CAN bus, the CAN bus is used for transmitting the parameter configuration, the running state, the debugging information, the abnormal alarm information and the transmission file of the height adjuster to the CNC numerical control system to realize the remote debugging function, and the CAN bus is configured with a CAN bus protocol.
In order to perfect the function of the Modbus, the Modbus is used for transmitting the parameter configuration, the running state, the debugging information and the abnormal alarm information of the height adjuster and defining a holding register to the CNC numerical control system, and the Modbus is configured with a Modbus protocol.
Based on above-mentioned total linear digital arc voltage increaser, this application still provides an increaser control system for control increaser work, control system includes from bottom to top in proper order
The hardware layer is used for acquiring information, transmitting signals to the system software layer and receiving signals to respond;
the device driver layer is used for initializing and managing the devices of the hardware layer and providing an access interface for the system software layer;
the system software layer is used for receiving the signals transmitted by the device driving layer, processing the signals and transmitting the signals to the application software layer;
the application software layer is used for realizing an application program written by the height adjuster;
the application software layer comprises
The state machine module is used for controlling the process flow of the height adjuster and realizing the real-time switching of different working states;
and the detection module is used for detecting the real-time height of the cutting torch and the abnormal state of the height adjuster.
To facilitate signal reception and processing, the system software layer includes
The PID adjusting module is used for reading the arc voltage value to obtain the height of the cutting torch, comparing the height with a preset height value, quickly adjusting the height of the cutting torch according to a comparison result, and controlling the height of the height adjuster;
the measured value filtering module is used for carrying out digital filtering on the measured value and reducing the error of the measured value;
the parameter module is used for storing, restoring, importing and exporting parameters;
and the embedded operation module is used for file management, storage management, task management and equipment management.
The height adjuster comprises a prohibition state and a processing state, and the work flow of the prohibition state comprises manual movement, parameter adjustment and equipment debugging.
The working steps of the height adjuster in a processing state comprise:
s1, judging whether the height adjuster is abnormal currently by a control system;
s2, if the control system judges that the heightening device is abnormal currently, the heightening device feeds the current abnormal state back to the CNC numerical control system through a bus; if the control system judges that the heightening device is not abnormal at present, the control system sends a cutting starting command to the heightening device through the bus;
s3, the height adjuster executes a positioning action and simultaneously feeds back the current state of the height adjuster to the control system in real time;
s4, the control system judges whether the positioning of the height adjuster is successful according to the feedback information;
s5, if the positioning of the height adjuster is successful, the height adjuster executes the arcing action sent by the control system, and simultaneously feeds back the current state of the height adjuster to the control system in real time; if the heightening device is not positioned successfully, the cutting action is finished;
s6, judging whether the arc striking of the height adjuster is successful or not by the control system;
s7, if the arc striking of the height adjuster is successful, the height adjuster performs height adjustment through a PID module, and if the arc striking of the height adjuster is unsuccessful, the cutting action is finished;
s8, judging whether a machining completion signal is sent to the height adjuster or not by the control system;
and S9, if the height adjuster receives the machining completion signal, ending the cutting action, and if the height adjuster does not receive the machining completion signal, returning to S7 to perform height adjustment through the PID module.
Based on the control system of the height adjuster, the application also provides a method for controlling a plurality of height adjusters to process simultaneously, which comprises the following steps:
s11, the control system sends a cutting starting command to the plurality of heightening devices through the bus;
s12, simultaneously starting positioning and arc striking operations by a plurality of height adjusters;
s13, judging whether the positioning and arc starting operation of each height adjuster is finished or not;
s14, if the positioning and arc starting operation of each height adjuster is finished, feeding the arc starting state of the corresponding height adjuster back to the control system; if the positioning and arc starting operation of the single height adjuster is not finished, returning to S12;
s15, judging whether all the heightening devices are successfully started;
and S16, if all the arc striking operations are successful, starting to execute cutting operation including height adjustment, and if the arc striking operations are not successful, returning to S12.
The invention has the beneficial effects that: the bus type digital arc voltage regulator comprises a bus type digital arc voltage regulator,
1. through the bus interface on the increaser, rely on devices such as CAN bus or Modbus bus connection CNC numerical control system, operating panel, improved the complicated mode of working a telephone switchboard of current increaser, the integral erection is convenient succinct more.
2. The anti-interference bus has better anti-interference performance, most data lines are connected through twisted pairs when the bus is connected, and the grounding metal shielding protective layer is arranged outside the bus, so that the bus is not easily influenced by interference.
The height regulator control system is used for controlling the height regulator,
1. through the interaction of the bus and the CNC numerical control system, the function of transmitting various states, parameters and debugging information in real time can be realized on the basis of the existing height adjuster, and fault clearing and debugging are convenient in the using process.
2. The transmission of an upgrade file can be supported through bus connection, and the online upgrade of the height adjuster is realized.
3. When communication is disconnected due to excessive interference, the disconnection condition can be identified through software of the control system, and the connection can be reconnected within a few milliseconds, so that the communication is kept uninterrupted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a wiring diagram of the present invention;
FIG. 2 is a wiring diagram of the operation panel of the present invention;
FIG. 3 is a schematic diagram of a CAN bus architecture of the present invention;
FIG. 4 is a schematic diagram of the CAN bus message definition of the present invention;
FIG. 5 is a hierarchical view of the control system of the present invention;
FIG. 6 is a flow chart of the operation of the PID module of the invention;
FIG. 7 is a flow chart of the manual movement of the present invention in the up-regulator disabled state;
FIG. 8 is a flow chart of parameter adjustment in a riser disable state of the present invention;
FIG. 9 is a flow chart of the debugging of a device in a riser disable state of the present invention;
FIG. 10 is a flow chart of the operation of the riser in the as-machined condition of the present invention;
fig. 11 is a flow chart of the present invention for the simultaneous processing of multiple risers.
Labeled in the figure as: 1. cutting a torch; 2. a protective cap; 3. a workpiece to be cut; 4. a proximity switch.
Detailed Description
Example one
As shown in fig. 1 and 2, a bus-type digital arc voltage regulator is used for measuring a voltage value between a cutting torch 1 and a workpiece 3 to be cut and regulating the cutting height of the cutting torch 1 in real time according to the voltage value, and comprises a bus interface and a conventional interface, wherein the conventional interface at least comprises a second interface coupled with a lifting motor, a limit switch and a direct current switch power supply interface, a third interface coupled with a proximity switch 4 on the cutting torch 1, a fourth interface coupled with a voltage division plate and a sixth interface coupled with a stepping motor driver, and the conventional interface further comprises a first interface used for being connected with a CNC system; the bus interface further comprises a fifth interface coupled with the operation panel, and a CNC numerical control system is further connected to a circuit between the fifth interface and the operation panel.
The CNC system is connected with the heightening device through a first interface in a conventional way, and the connection mode judges whether signal transmission exists or not through detecting high and low levels; when the fifth interface is connected with the height regulator, the fifth interface is in bus connection, differential signals are transmitted through a protocol in the connection mode, and more information can be transmitted through simple wiring.
As shown in fig. 1, the pressure-dividing plate is electrically connected to a plasma power supply, a plasma arcing interface of the plasma power supply is electrically connected to an external relay, and the external relay is coupled to a third interface; the pressure divider is also connected with a protective cap 2 on the cutting torch 1 and used for collision detection of the protective cap 2.
The working principle of the height adjuster used in cooperation with the CNC numerical control system, the stepping motor driver, the pressure dividing plate and other devices is the same as that of the existing height adjuster, and is not described herein again.
The bus interface includes a CAN bus for riser communication.
As shown in fig. 3, the CAN bus is used to transmit parameter configuration, operating state, debugging information, abnormal alarm information, and transmission files of the height adjuster to the CNC numerical control system, so as to implement a remote debugging function; the CAN bus comprises a CAN-H interface, a CAN-L interface, a power interface and a PE interface, wherein the PE interface is used for signal shielding, and the CAN bus is configured with a CAN bus protocol.
The CAN bus protocol is configured with a node definition, a message definition, a heartbeat message, a heartbeat period, a PDO message and an SDO message according to the use requirement, wherein the node definition is used for defining equipment in the CAN bus network, the node corresponds to a unique node ID, the message definition is used for transmitting a working signal of the height adjuster, and the heartbeat message is used for mutual identification of the equipment in the CAN bus network; the heartbeat period is used for the nodes to send heartbeat messages outwards according to the corresponding period, the PDO messages are used for transmitting real-time data and do not need to receive node responses, and the SDO messages are used for data transmission and need to receive node responses.
As shown in fig. 4, the packet definition includes 29 bits, and specifically includes 7 bits of function data, 7 bits of source node ID, 7 bits of destination node ID, 4 bits of packet function code, and 4 bits of fixed value, where the 7 bits of function data are used to distinguish the function of the packet, the 7 bits of source node ID are used for a node that sends a packet, the 7 bits of destination node ID are used for a node that receives a packet, the 4 bits of packet function code are used to respond to different functions according to different packet function codes, and the fixed value is encoded to 1111.
The CAN bus also has a BusOff processing function, and CAN be quickly recovered after BusOff (bus closing) is generated due to reasons such as interference and the like of the CAN bus; the height adjuster is provided with a height adjuster protocol corresponding to the CAN bus protocol and used for defining the address and the type of the parameters commonly used by the height adjuster.
As shown in fig. 5, based on the bus-type digital arc voltage regulator, the present application provides a control system of the voltage regulator, which is used for controlling the operation of the voltage regulator, the control system sequentially includes a hardware layer, an equipment driving layer, a system software layer and an application software layer from bottom to top, the hardware layer includes a voltage regulator, a CNC numerical control system, an operation panel, a voltage divider, a plasma power supply and a cutting torch 1, and is used for collecting information, transmitting signals to the system software layer and receiving signals to make a response; the device driving layer comprises a USB driver, a bus driver and a motor driver and is used for initializing and managing the device of the hardware layer and providing an access interface for the system software layer; the system software layer is used for receiving the signals transmitted by the device driving layer, processing the signals and transmitting the signals to the application software layer; the application software layer is used for realizing an application program written by the height adjuster; the application software layer comprises a state machine module for controlling the technological process of the height regulator, switching the working state in real time and a detection module for detecting the abnormal state of the height regulator. The detection module comprises the following functions:
1. and judging whether arc breakage occurs or not according to the actual arc voltage value acquired by the sensor, wherein the working principle of the arc voltage value acquired by the sensor is the same as that of the conventional heightening device, and the details are not repeated herein.
2. And judging whether collision occurs or not according to a signal of a proximity switch 4 connected with the height adjuster, namely judging whether collision occurs between the cutting torch 1 and a workpiece 3 to be cut.
3. And judging whether collision occurs or not according to a signal of a protective cap 2 connected with the pressure dividing plate, namely judging whether collision occurs between the cutting torch 1 and a workpiece 3 to be cut. Distinguished from the proximity switch 4, the protection of the protective cap 2 is more sensitive and reacts more quickly to the sheet metal to be cut.
4. And transmitting the abnormal state of the height adjuster and the acquired information to the upper CNC numerical control system in time.
As shown in fig. 5, the system software layer includes a PID adjusting module, a measured value filtering module, a parameter module and an embedded operation module, the PID adjusting module is used for reading the arc voltage value to obtain the height of the cutting torch 1, comparing the height with a preset height value, quickly adjusting the height of the cutting torch 1 according to the comparison result, and performing height control of the height adjuster; the measured value filtering module is used for filtering the measured value and reducing the error of the measured value, and the filtering mode can comprise low-pass filtering and sliding average filtering; the parameter module is used for storing, restoring, importing and exporting parameters; the embedded operation module is used for file management, storage management, task management and equipment management.
The file management is used for solving the problems of storage, sharing, confidentiality, protection and the like of file resources; the storage management is used for providing a storage space, improving the utilization rate of the memory and facilitating the use of a user; the task management is used for describing and managing the running software in the embedded system and completing the allocation and scheduling of assistant resources; device management is used to improve the utilization of input and output devices.
As shown in fig. 6, the working process of the PID adjusting module includes the following steps:
s21, starting automatic tracking by a PID adjusting module;
s22, reading the height of the current cutting torch 1, namely an arc voltage value, by a PID (proportion integration differentiation) adjusting module;
s23, judging whether the current cutting torch 1 height is consistent with the height set by a user by a PID regulating module;
and S24, if the height of the current cutting torch 1 is consistent with the height set by the user, waiting for the next stage, and if the height is not consistent, transmitting an error value to the PID controller, so that the PID adjusting module controls the cutting torch 1 to move to the set height position quickly, and repeating the S22 to perform dynamic adjustment.
The height adjuster comprises a prohibition state and a processing state, the work flow of the prohibition state comprises manual movement, parameter adjustment and equipment debugging, and the manual movement, the parameter adjustment and the equipment debugging are all manually operated through a control keyboard on a bus panel of the height adjuster or a remote interface of a CNC (computerized numerical control) system in the figure 1.
As shown in fig. 7, the step of manually moving the height adjuster when the height adjuster is in the inhibition state includes:
s31, the control system sends an ascending or descending command to the height adjuster through the bus;
s32, judging whether the heightening device receives a command given by the bus by the control system;
s33, if the control system judges that the heightening device receives a command given by the bus, judging whether the heightening device is abnormal currently; if the control system judges that the heightening device does not receive the command given by the bus, the S31 is returned;
s34, if the control system judges that the heightening device is not abnormal at present, the heightening device is controlled to move up or down, and meanwhile, the current moving state of the heightening device is fed back to the CNC system through a bus; if the control system judges that the heightening device is abnormal currently, the heightening device is controlled to stop moving, and meanwhile, the current abnormal state of the heightening device is fed back to the CNC numerical control system through a bus;
s35, judging whether the height adjuster is abnormal in the moving process by the control system;
s36, if the control system judges that the heightening device is abnormal in moving, the heightening device is controlled to stop moving, and meanwhile, the current abnormal state of the heightening device is fed back to the CNC system through a bus; if the control system judges that the heightening device does not have abnormality in the movement, whether the heightening device receives a stop instruction given by the bus is judged;
s37, if the control system judges that the raiser receives a stop instruction of the bus, controlling the raiser to stop moving; if the control system determines that the booster has not received the stop command for the bus, it returns to S34.
As shown in fig. 8, the step of adjusting the parameter when the booster is in the disabled state includes:
s41, the control system sends a parameter modification command to the height adjuster through a bus;
s42, judging whether the heightening device receives a command given by the bus by the control system;
s43, if the control system judges that the heightening device receives a command given by the bus, judging whether the heightening device is abnormal at present; if the control system judges that the heightening device does not receive the command given by the bus, returning to S41;
s44, if the control system judges that the heightening device is not abnormal currently, the control system controls the heightening device to modify parameters, and simultaneously feeds back information such as current parameter values and states of the heightening device to the CNC numerical control system through a bus; and if the control system judges that the heightening device is abnormal currently, feeding the current abnormal state of the heightening device back to the CNC numerical control system through the bus.
As shown in fig. 9, the step of debugging the device when the riser is in the disabled state includes:
s51, the heightening device sends the current motion state, the input/output port state, the parameter value and the like to a control system through a bus;
s52, judging whether the heightening device is abnormal currently by the control system;
s53, if the control system judges that the heightening device is not abnormal at present, judging whether the control system sends a debugging command; if the control system judges that the heightening device is abnormal currently, the heightening device feeds the current abnormal state back to the CNC numerical control system through the bus;
s54, if the control system sends out a debugging command, the heightening device executes the control command sent by the control system bus;
and S55, the heightening device feeds back the command execution state to the control system, and returns to S51 for periodic debugging.
As shown in fig. 10, the working steps of the height adjuster in the processing state include:
s1, judging whether an adjuster is abnormal at present by a control system;
s2, if the control system judges that the heightening device is abnormal currently, the heightening device feeds the current abnormal state back to the CNC numerical control system through a bus; if the control system judges that the heightening device is not abnormal at present, the control system sends a cutting starting command to the heightening device through the bus;
s3, the height adjuster executes a positioning action and simultaneously feeds back the current state of the height adjuster to the control system in real time;
s4, the control system judges whether the positioning of the height adjuster is successful according to the feedback information;
s5, if the positioning of the height adjuster is successful, the height adjuster executes the arcing action sent by the control system, and simultaneously feeds back the current state of the height adjuster to the control system in real time; if the heightening device is not positioned successfully, the cutting action is finished;
s6, judging whether the arc striking of the height adjuster is successful or not by the control system;
s7, if the arc striking of the height adjuster is successful, the height adjuster adjusts the height through a PID module, and if the arc striking of the height adjuster is unsuccessful, the cutting action is finished;
s8, judging whether a machining completion signal is sent to the height adjuster or not by the control system;
and S9, if the height adjuster receives the machining completion signal, ending the cutting action, and if the height adjuster does not receive the machining completion signal, returning to S7 to perform height adjustment through the PID module.
As shown in fig. 11, based on the above-mentioned control system of the height adjuster, the present application also provides a method for controlling a plurality of height adjusters to process simultaneously, which includes the following steps:
s11, the control system sends a cutting starting command to the plurality of heightening devices through the bus;
s12, simultaneously starting positioning and arc striking operations by a plurality of height adjusters;
s13, judging whether the positioning and arc starting operation of each height adjuster is finished or not;
s14, if the positioning and arc starting operation of each height adjuster is finished, feeding the arc starting state of the corresponding height adjuster back to the control system; if the positioning and arc starting operation of the single height adjuster is not finished, returning to S12;
s15, judging whether all the heightening devices are successfully started;
and S16, if the arcing is successful, starting to execute the cutting operation comprising height adjustment, and if the arcing is not successful, returning to S12.
Example two
The structure of the present embodiment is substantially the same as that of the first embodiment, and the difference is that: the bus interface of the present embodiment includes a Modbus for riser communication.
The Modbus is used for transmitting debugging information and abnormal alarm information of the height adjuster to the CNC numerical control system, defining a holding register, storing parameters and the operation state of the height adjuster, and continuously updating a connection mark register when in use, and is configured with a Modbus protocol; the heightening device is provided with an heightening device protocol corresponding to the Modbus bus protocol and used for defining the address and the type of common parameters of the heightening device.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A bus type digital arc voltage regulator is used for measuring a voltage value between a cutting torch and a workpiece to be cut and regulating the cutting height of the cutting torch in real time according to the voltage value, and is characterized by comprising a bus interface and a conventional interface, wherein the conventional interface at least comprises:
the second interface is respectively coupled with the lifting motor, the limit switch and the direct-current switch power supply interface;
the third interface is coupled with an external arc starting relay and a cutting torch positioning proximity switch on the cutting torch;
the fourth interface is coupled with the voltage division plate, the voltage division plate is electrically connected with a plasma power supply, a plasma arcing interface of the plasma power supply is electrically connected with an external arcing relay, and the external arcing relay is coupled with the third interface; the pressure dividing plate is also connected with a protective cap on the cutting torch and used for collision detection of the plasma cutting torch;
a sixth interface coupled to the stepper motor driver;
the bus interface comprises a fifth interface coupled with the operation panel, and a CNC (computer numerical control) system is further connected to a circuit between the fifth interface and the operation panel;
the bus interface comprises a CAN bus, and the CAN bus is used for communication of the height adjuster;
the CAN bus is used for transmitting parameter configuration, running state, debugging information, abnormal alarm information and transmission files of the height adjuster to the CNC numerical control system to realize a remote debugging function, and the CAN bus is configured with a CAN bus protocol;
the CAN bus protocol is configured with a node definition, a message definition, a heartbeat message, a heartbeat period, a PDO message and an SDO message according to the use requirement, wherein the node definition is used for defining equipment in the CAN bus network, the node corresponds to a unique node ID, the message definition is used for transmitting a working signal of the height adjuster, and the heartbeat message is used for mutual identification of the equipment in the CAN bus network; the heartbeat period is used for the nodes to send heartbeat messages outwards according to the corresponding period, the PDO messages are used for transmitting real-time data and do not need to receive node responses, and the SDO messages are used for data transmission and need to receive node responses;
the message definition comprises 29 bits, specifically comprises 7-bit function data, a 7-bit source node ID, a 7-bit target node ID, a 4-bit message function code and a 4-bit fixed value, the 7-bit function data is used for distinguishing the function of the message, the 7-bit source node ID is used for sending the node of the message, the 7-bit target node ID is used for receiving the node of the message, the 4-bit message function code is used for responding to different functions according to different message function codes, and the fixed value is coded to 1111.
2. A control system of a height adjuster, which comprises the bus-type digital arc voltage height adjuster as claimed in claim 1 and is used for controlling the work of the height adjuster, and is characterized in that the control system sequentially comprises the height adjuster from bottom to top
The hardware layer is used for acquiring information, transmitting signals to the system software layer and receiving signals to respond;
the device driver layer is used for initializing and managing the devices of the hardware layer and providing an access interface for the system software layer;
the system software layer is used for receiving the signals transmitted by the device driving layer, processing the signals and transmitting the signals to the application software layer;
the application software layer is used for realizing an application program written by the height adjuster;
the application software layer comprises
The state machine module is used for controlling the process flow of the height adjuster and realizing real-time switching of different working states;
and the detection module is used for detecting the real-time height of the cutting torch and the abnormal state of the height adjuster.
3. The riser control system of claim 2, wherein the system software layer comprises
The PID adjusting module is used for reading the arc voltage value to obtain the height of the cutting torch, comparing the height with a preset height value, quickly adjusting the height of the cutting torch according to a comparison result, and controlling the height of the height adjuster;
the measured value filtering module is used for carrying out digital filtering on the measured value and reducing the error of the measured value;
the parameter module is used for storing, restoring, importing and exporting parameters;
and the embedded operation module is used for file management, storage management, task management and equipment management.
4. The riser control system of claim 3, wherein the riser comprises a disabled state and a process state, the disabled state including workflow including manual movement, parameter adjustment, and equipment commissioning.
5. The control system of claim 4, wherein the machining method of the pilot in a machining state comprises the steps of:
s1, judging whether the height adjuster is abnormal currently by a control system;
s2, if the control system judges that the heightening device is abnormal currently, the heightening device feeds the current abnormal state back to the CNC numerical control system through a bus; if the control system judges that the heightening device is not abnormal at present, the control system sends a cutting starting command to the heightening device through the bus;
s3, the height adjuster executes a positioning action and simultaneously feeds back the current state of the height adjuster to the control system in real time;
s4, the control system judges whether the positioning of the height adjuster is successful according to the feedback information;
s5, if the positioning of the height adjuster is successful, the height adjuster executes the arcing action sent by the control system, and simultaneously feeds back the current state of the height adjuster to the control system in real time; if the heightening device is not positioned successfully, the cutting action is finished;
s6, judging whether the arc striking of the height adjuster is successful or not by the control system;
s7, if the arc striking of the height adjuster is successful, the height adjuster adjusts the height through a PID module, and if the arc striking of the height adjuster is unsuccessful, the cutting action is finished;
s8, judging whether a machining completion signal is sent to the height adjuster or not by the control system;
and S9, if the height adjuster receives the machining completion signal, ending the cutting action, and if the height adjuster does not receive the machining completion signal, returning to S7 to perform height adjustment through the PID module.
6. A method of controlling simultaneous machining of a plurality of risers using the riser control system of any of claims 3 to 5, comprising the steps of:
s11, the control system sends a cutting starting command to the plurality of heightening devices through the bus;
s12, simultaneously starting positioning and arc striking operations by a plurality of height adjusters;
s13, judging whether the positioning and arc striking operation of each height adjuster is finished or not;
s14, if the positioning and arc striking operation of each height adjuster is finished, feeding the arc striking state of the corresponding height adjuster back to a control system; if the positioning and arc starting operation of the single height adjuster is not finished, returning to S12;
s15, judging whether all the heightening devices are successfully started;
and S16, if the arcing is successful, starting to execute the cutting operation comprising height adjustment, and if the arcing is not successful, returning to S12.
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| CN201922161U (en) * | 2010-12-20 | 2011-08-10 | 广东工业大学 | Arc voltage adjusting control system for machine |
| CN102744506B (en) * | 2012-07-20 | 2014-04-23 | 大连交通大学 | Intrinsic safe two-dimensional intelligent control arc voltage increaser |
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