CN117348473A - Rear-end constraint control subsystem for multi-node fine step synchronous jacking system - Google Patents
Rear-end constraint control subsystem for multi-node fine step synchronous jacking system Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a rear-end constraint control subsystem related to a multi-node fine step synchronous jacking control system, which comprises: the power conversion unit, the microprocessor unit and the communication unit; the power supply conversion unit is used for converting an input power supply and providing a power supply for each unit; the microprocessor unit is used for receiving and detecting the operation parameter information sent by the front-end control system and sending out a corresponding instruction according to the detection result; the communication unit is used for information interaction. The invention can always monitor the self-checking constraint specified by each front-end control system and dynamically monitor the running state and result of each front-end control system; the starting authority of the jacking step length is controlled, and whether the next step length jacking operation is executed is judged according to the information returned by the jacking step length operation of each front-end control system; the invention relates to a multi-node synchronous jacking control system, an ultra-high power source system, an intermediate bridge of a terminal management platform software system and the like in engineering occasions such as a multi-node fine step synchronous jacking system, integral jacking or translation of a building, a large-scale working platform of a shipyard and the like, which have the functions of the intermediate bridge, such as cooperative operation, operation safety guarantee, information interaction and the like, among the systems, so that the association control capability among the systems is greatly improved, integral fusion among coordination is realized, and open information interaction among the systems is realized.
Description
Technical Field
The invention relates to the technical field of back-end control, in particular to a back-end constraint control subsystem for a multi-node fine step synchronous jacking system.
Background
The operation of building machine, building nondestructive jacking or moving and the like in the current market is almost realized by adopting a system integration means, the technical content is low, the work coordination among related devices is poor, and the operation danger caused by incomplete monitoring and feedback judgment is large. Based on the defects, the invention provides the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system, which has a bridging function of certain control operation, and is used for realizing the association control bridge in the research and development engineering of the whole multi-node fine step synchronous jacking system.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a rear-end constraint control subsystem for a multi-node fine step synchronous jacking system.
The invention provides a rear-end constraint control subsystem for a multi-node fine step synchronous jacking system, which comprises the following components: the power conversion unit, the microprocessor unit and the communication unit;
the power supply conversion unit is used for converting an input power supply and providing a proper working power supply for each unit;
the microprocessor unit is used for receiving and detecting the operation parameter information sent by the front-end control system and sending out a corresponding instruction according to the detection result; and the microprocessor unit is also in information and instruction interaction with the ultra-high power source system and the background terminal management software platform.
The communication unit is used for information interaction.
Preferably, the power conversion unit comprises a power conversion chip, a BUCK converter, a linear processor, a voltage reference chip, an AC/DC converter and peripheral elements, wherein the AC/DC converter is used for converting an AC power supply into a DC power supply, the power conversion chip converts a 48V voltage into a 24V voltage, the BUCK converter converts the 48V voltage into a 3.6V voltage, and the linear processor obtains a 3.3V power supply voltage to supply power to the relevant unit; the power conversion chip is of the following type: LV14360, the model of BUCK converter is: LM2576HVS5, model number of the linear processor is: LP3966, a model of the voltage reference chip is: REF2930, the type of the AC/DC converter is: LD60-23B48.
Preferably, the microprocessor unit comprises ARM M4 series MCU and peripheral element, the MCU receives and detects whether the operation parameter sent by the front-end control system exceeds the specified dynamic range, and sends out corresponding instruction according to the detection result.
Preferably, the operation parameters comprise the time spent by step lifting, jack oil pressure, the operation state of the numerical control valve, step distance measurement value and field environment temperature.
Preferably, the microprocessor unit judges whether to execute the next step jacking operation according to the received operation parameters, when all the operation parameters are judged to be in accordance with the conditions, the microprocessor unit sends a next step jacking operation instruction to the front-end control system in a broadcast network communication mode, otherwise, the microprocessor unit reports the reason of the termination jacking operation to the background terminal, and simultaneously blocks the control output of the front-end control system.
Preferably, in the jacking operation procedure, a pre-jacking operation is first performed as to whether the jacking mechanism is in close contact with the object (part) to be jacked.
Preferably, after the step jacking operation is completed, the system starts the power conversion unit to provide charging service for the front-end control system through a timing roll call mode until the jacking operation again in the next working day begins.
Preferably, the communication unit comprises 6 serial communication, four RS485 serial communication, one Bluetooth communication and one communication with the liquid crystal touch screen;
in the RS485 serial port communication: the first path of RS485 is used for carrying out broadcasting and roll call information interaction with the front-end control system, the third path of RS485 is used for carrying out association control with the intelligent power control system, and the fourth path of RS485 is used for carrying out information interaction with the background terminal;
the four-channel RS485 serial port communication comprises an RS485 communication chip and peripheral elements, and the model of the RS485 chip is THVD1406;
the Bluetooth communication is composed of a Bluetooth chip and peripheral elements and is used for operating an information source for field operators through a system, and the type of the Bluetooth chip is PW05.
The rear-end constraint control subsystem for the multi-node fine step synchronous jacking system has the following beneficial effects:
1. the invention can always monitor the self-checking constraint specified by each front-end control system and dynamically monitor the running state and result of each front-end control system;
2. the invention controls the starting authority of the jacking step length (or the falling step length), and judges whether the jacking step length (or the falling step length) is within a set range or not according to the information returned by the jacking step length (or the falling step length) operation of each front-end control system and whether the jacking step length or the falling step length operation of the next step length is executed or not. The safe and stable operation of the system is ensured.
3. The invention provides the broadcasting and roll call information interaction function by using the RS485 transmission link, and improves the association control capability between the system and each system.
4. The invention forms a central nerve for closely running coordination, running parameter monitoring, instruction distribution and information interaction among a jacking system, a power system and a terminal software platform related to a multi-node jacking operation occasion of a large object.
5. The invention is characterized in that the invention is closely cooperated with a multi-node fine step synchronous jacking system, and the jacking displacement control of a multi-jacking node and a jacking stage of 32 cm is subdivided into the fine displacement control of 32 jacking step, thereby greatly enhancing the safety and the accuracy of jacking displacement.
Drawings
FIG. 1 is a control circuit diagram of a back-end constraint control subsystem for a multi-node fine step synchronous jacking system.
Detailed Description
Referring to fig. 1, the present embodiment provides a back-end constraint control subsystem for a multi-node fine step synchronous jacking system, including: the power conversion unit, the microprocessor unit and the communication unit;
the power supply conversion unit is used for converting an input power supply and providing a power supply for each unit;
the microprocessor unit is used for receiving and detecting the operation parameter information sent by the front-end control system and sending out a corresponding instruction according to the detection result; and the microprocessor unit is also in information and instruction interaction with the ultra-high power source system and the background terminal management software platform.
The communication unit is used for information interaction.
The power conversion unit consists of a power conversion chip, a BUCK converter, a linear processor, a voltage reference chip, an AC/DC converter and peripheral elements, wherein the AC/DC converter is used for converting an AC power supply into a DC power supply, the power conversion chip converts a 48V voltage into a 24V voltage, the BUCK converter converts the 48V voltage into a 3.6V voltage, and a 3.3V pure DC source is obtained through the linear processor to supply power to the relevant units; the power conversion chip is of the following type: LV14360, the model of BUCK converter is: LM2576HVS5, model number of the linear processor is: LP3966, a model of the voltage reference chip is: REF2930, the type of the AC/DC converter is: LD60-23B48.
The microprocessor unit consists of ARM M4 series MCU and peripheral elements, the MCU receives and detects whether the operation parameters sent by the front-end control system exceed the specified dynamic range, and sends out corresponding instructions according to the detection result.
The operation parameters comprise the time spent by step lifting, jack oil pressure, the operation state of the numerical control valve, step distance measurement value and field environment temperature.
The microprocessor unit starts the front-end jacking control system and receives initialization information of each front-end controller microprocessor of the front-end jacking control system.
And after the microprocessor unit judges that the front-end controller microprocessors of the front-end jacking control system are initialized normally, the front-end jacking control system are instructed to execute pre-jacking operation.
After judging that the pre-jacking operation is normal, the microprocessor unit judges whether to execute the step-length jacking operation according to the operation parameters of the front-end jacking control system, when all the operation parameters are judged to be in accordance with the conditions, the microprocessor unit sends out a next step-length jacking operation instruction to the front-end control system in a broadcast network communication mode, otherwise, the microprocessor unit reports the reason of the termination jacking operation to a background terminal, and simultaneously blocks the control output of the front-end control system.
After the step jacking operation is finished, the system starts the power conversion unit to provide charging service for the front-end control system through a timing roll call mode until the jacking operation again in the next working day begins.
The communication unit comprises 6 serial communication, four RS485 serial communication, one Bluetooth communication and one communication with the liquid crystal touch screen;
in the RS485 serial port communication: the first path of RS485 is used for carrying out broadcasting and roll call information interaction with the front-end control system, the third path of RS485 is used for carrying out association control with the intelligent power control system, and the fourth path of RS485 is used for carrying out information interaction with the background terminal;
the four-channel RS485 serial port communication comprises an RS485 communication chip and peripheral elements, and the model of the RS485 chip is THVD1406;
the Bluetooth communication is composed of a Bluetooth chip and peripheral elements, and the model of the Bluetooth chip is PW05.
In this embodiment, since the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system plays a role of a bridge between the front-end control system, the intelligent power control system and the terminal service platform system, the main function of the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system is to provide abundant long-line communication resources. The task of the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system is to provide roll-call charging for a front-end control system in a bus mode, sample relevant operation parameters of the front-end control system, and make relevant control instructions after safety judgment of collected data; a back-end constraint control subsystem for a multi-node fine step synchronous jacking system sends jacking step operation instructions to each front-end control system in a broadcast communication mode. When the operation parameters of any front-end control system exceed the regulated dynamic range, a rear-end constraint control subsystem for the multi-node fine step synchronous jacking system sends a locking instruction to the intelligent power control system; the method comprises the steps of providing the terminal service platform system with the operation information of a front-end control system and an intelligent power control system, receiving the instructions of the terminal service platform system and the like. An ARMM4 series MCU with the operation speed of 168MHz is adopted as a core microprocessor of a rear-end constraint control subsystem for a multi-node fine step synchronous jacking system.
The power supply part circuit of the system is relatively complex as can be seen from the electric schematic diagram of the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system, and the main reason is that the front-end control system is required to be charged in a bus roll call mode: in actual construction, 64 maximum jacking nodes are randomly distributed on a construction site. In view of the complexity of the working conditions of the construction site, bus communication and bus power supply are adopted to reduce site wiring, and the data communication and charging tasks of 64 jacking nodes are completed by using two buses. A 6-core cable was used, with 4 cores allocated to two pairs of RS485 and the remaining 2 cores allocated to a 48V dc charging source. The front end control system of each jacking node needs to control and drive a number regulating valve with larger power consumption in the operations of pre-jacking, falling and the like, and in order to avoid using an alternating current public network to supply power for the front end control systems of 64 jacking nodes, a series lithium battery pack is used for supplying power for the front end control systems. Using 18650 four lithium batteries to be connected in parallel to form a group, wherein the four groups are connected in parallel, charging the four groups of battery packs connected in series by adopting BMS control, and assuming that the lowest discharge threshold voltage of each battery pack is 3V; thus four series battery packs can provide 12-16.8V terminal voltage, 3100 x 4 = 12400 milliamp hour capacity. The front end control system for limiting each jacking node is not more than 500m away from a rear end constraint control subsystem for a multi-node fine step synchronous jacking system, and the charging current is 0.5A. According to measurement, a certain cable is used for conveying 0.56A charging current, and the voltage drop of a circuit after 500m transmission is 28V, so that under the power supply condition of 48V and 0.5A charging current, the voltage at the interface of the front end jacking controller furthest after 500m transmission is 20V, and the BMS control charging requirement of 4 groups of serial battery packs can be met. The necessity of providing a 60W output 48V DC source AC/DC converter POW1 in the design is elucidated by the above statements.
The rear-end constraint control subsystem for the multi-node fine step synchronous jacking system also provides a function of adjusting related parameters of a front-end control system, the adjusting function is realized by using a liquid crystal touch screen with power supplied as 24V as a dialogue channel with a CPU in the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system, and a conversion chip IC1 in the figure converts 48V direct current input into 24V direct current. The control part chips of the rear-end constraint control subsystem for the multi-node fine step-size synchronous jacking system are all 3.3V powered, and the linear voltage regulation of 48V direct current output by an AC/DC module is extremely low-efficiency, so that the BUCK converter is designed, 48V input is firstly converted into 3.6V, and pure 3.3V power supply is obtained through low-voltage-difference linear processing. From the viewpoint of power consumption, 48V charging power supply overhead p1=48v0.6a=28.8w, liquid crystal touch screen overhead 12W, and microelectronic part estimation overhead 2W, so it is reasonable to use an AC/DC module with 60W output. The full-load operation of the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system is estimated to consume 43W of power, and the residual power supply allowance of the modules needs to be considered when other functional modules need to be expanded. The design concept and technical treatment measures of the power supply part of the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system are detailed.
The rear-end constraint control subsystem for the multi-node fine step synchronous jacking system uses 6 serial port communication, wherein serial port 1 and serial port 2 form roll call and broadcast communication buses with each front-end jacking control system through two RS485 sheets, serial port 3 forms long line communication with an intelligent power control system through RS485, serial port 4 provides communication between the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system and a liquid crystal touch screen, serial port 5 forms communication between the rear-end constraint control subsystem for the multi-node fine step synchronous jacking system and Bluetooth, and serial port 6 forms communication between a terminal platform through an RS485 link.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The back-end constraint control subsystem for the multi-node fine step synchronous jacking system is characterized by comprising the following components: the power conversion unit, the microprocessor unit and the communication unit;
the power supply conversion unit is used for converting an input power supply and providing a power supply for each unit;
the microprocessor unit is used for receiving and detecting the operation parameter information sent by the front-end control system and sending out a corresponding instruction according to the detection result;
the communication unit is used for information interaction.
2. The back-end constraint control subsystem for the multi-node fine step synchronous jacking system according to claim 1, wherein the power conversion unit consists of a power conversion chip, a BUCK converter, a linear processor, a voltage reference chip, an AC/DC converter and peripheral elements, wherein the AC/DC converter is used for converting an AC power supply into a 48-volt DC power supply for roll-call charging of the front-end jacking control subsystem (48-volt DC source is adopted in consideration of long-line transmission line voltage drop); the 48V direct current source is also converted into 24V voltage through DC/DC conversion for the liquid crystal display screen; the 48V direct current source is also converted into a 3.6V direct current source through DC/DC conversion, and a pure 3.3V power supply is obtained through a linear low-voltage difference power supply chip to supply power to all needed units; the power conversion chip is of the following type: LV14360, the model of BUCK converter is: LM2576HVS5, model number of the linear processor is: LP3966, a model of the voltage reference chip is: REF2930, the type of the AC/DC converter is: LD60-23B48.
3. The rear-end constraint control subsystem for the multi-node fine step synchronous jacking system according to claim 2, wherein the microprocessor unit comprises an ARM M4 series MCU and peripheral elements, the MCU receives and detects whether the operation parameters sent by the front-end control system exceed the specified dynamic range, and sends out corresponding instructions according to the detection result.
4. A back-end constraint control subsystem for a multi-node fine step synchronous jacking system as claimed in claim 3, wherein said operating parameters include time spent on step jacking, jack oil pressure, numerical control valve operating status, step ranging value, on-site ambient temperature.
5. The back-end constraint control subsystem for a multi-node fine step synchronous jacking system of claim 4, wherein said microprocessor unit determines whether to execute the next step jacking operation based on the received operation parameters fed by each front-end jacking controller in the front-end jacking control subsystem; when all the physical parameters acquired in the jacking (or falling) operation of all the jacking nodes are judged to be in accordance with the set value, a next step jacking operation instruction is sent to the front-end control system in a broadcast network communication mode. Conversely, when the operation parameters fed by one (or some) front-end jacking controllers in the front-end jacking control subsystem jump out of the set range, the back-end constraint control subsystem of the invention will make the following instructions and operations: 1. the operation of each front-end jacking controller of the front-end jacking control subsystem is immediately and synchronously started to lock the oil pressure of the jacking actuating mechanism after receiving the emergency stop operation instruction of the rear-end constraint control subsystem, so as to prevent the object to be jacked from sliding downwards; 2. the rear-end constraint control subsystem of the invention sends out an emergency fault signal to the ultra-high power source subsystem, the high power source subsystem outputs oil pressure (or releases oil pressure according to different control functions of the hydraulic station) to the locking hydraulic station, and then the operation of the compression motor is stopped; and 3, the back-end constraint control subsystem of the invention sends out information such as reason and fault codes of the emergency stop information to the terminal management platform.
6. The back-end constraint control subsystem for a multi-node fine step synchronization jacking system of claim 5, wherein upon activation of the back-end constraint control subsystem, roll-call charging operations provided for the front-end jacking control subsystem will always be in operation, regardless of whether the front-end jacking control subsystem is executing a job.
7. The back-end constraint control subsystem for a multi-node fine-step synchronization jacking system of claim 6, wherein said communication unit comprises 6 pairs of serial communications, serial communications resource allocation: UART1, UART2 connect respectively to the RS485 communication link, realize roll call communication and broadcast type communication with front end jacking control subsystem, UART3 connect to the RS485 link and communicate communication and control between the ultra-high power source systems, UART4 connect to the liquid crystal touch-sensitive screen, UART5 connect to bluetooth module, provide the operation information source for the field personnel, UART6 connect to the RS485 link and realize the information interaction with the terminal management software platform of backstage to realize the remote information communication under the architecture of the internet of things through the wide area network, realize remote monitoring. Remote maintenance, remote modification and rewriting of the operation program of the front-end jacking control system and the ultra-high power source system, and realization of field programmable service provider (ISP) function.
The four-channel RS485 serial port communication comprises an RS485 communication chip and peripheral elements, and the model of the RS485 chip is THVD1406;
the Bluetooth communication is composed of a Bluetooth chip and peripheral elements, and the model of the Bluetooth chip is PW05.
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