Multistage pump linkage control system

Abstract

The utility model relates to the technical field of water pump control, in particular to a multi-stage pump linkage control system which comprises multiple stages of pump stations connected in series, a water conveying pipeline connected with the adjacent pump stations, a controller, a sensor array, an abnormal state recognition circuit and an executing mechanism, and the sensor array, the abnormal state recognition circuit and the executing mechanism are electrically connected with the controller. The controller is used for receiving operation parameters of each stage of pump station in the sensor array, sending the operation parameters to the abnormal state identification circuit to execute fault identification, generating a parameter adjusting instruction according to an abnormal signal output by the abnormal state identification circuit, and sending the parameter adjusting instruction to the sensor array; the controller is further used for controlling the executing mechanism to execute the parameter adjusting instruction. According to the invention, the fault source can be automatically identified, the parameter cooperative adjustment of the execution mechanism can be triggered, and the self-adaptive adjustment efficiency of the multistage pump station system can be obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of water pump control technology, specifically a multi-stage pump linkage control system. Background Technology

[0002] A multi-stage pumping station system is a complex water transmission and distribution system composed of multiple pumping station units connected in series through a pipeline network. It is widely used in long-distance water transmission projects such as inter-basin water transfer, urban water supply, and agricultural irrigation. Its core feature is the efficient transportation of water resources through staged pressurization. The upstream pumping station initially raises the water level, and subsequent pumping stations progressively increase the pressure, while valves, flow regulation devices, and energy storage equipment form a dynamic balance system. This system exhibits nonlinear time-varying characteristics, with hydraulic coupling between pumping stations at each level. Changes in the operating status of a single-stage device are transmitted to the entire system through pipeline pressure waves.

[0003] Under traditional operation and maintenance models, the anomaly response mechanism of multi-level pumping station systems faces significant technical bottlenecks. Existing monitoring systems mostly employ a distributed sensor layout, with data acquisition systems at each level of the pumping station operating independently. When an abnormal condition such as equipment overload, pipeline leakage, or parameter exceeding limits occurs at a certain level of the pumping station, the system lacks intelligent fault location capabilities and still relies on manual experience combined with local data comparison for fault tracing. This lag means that protection devices can only execute preset single-unit shutdown procedures and cannot automatically trigger the linkage protection of related equipment based on the fault type, location, and propagation path.

[0004] Chinese Patent Publication No. CN114484948A discloses an energy-saving multi-stage pump frequency conversion linkage system, comprising: a primary pump pipeline, which includes several primary pump branches, each branch equipped with a primary pump and a chiller unit, the primary pumps being connected to the chiller unit, and the primary pump branches being connected in parallel; a secondary pump pipeline, which includes several secondary pump branches, each branch being connected in parallel, each branch equipped with one or more parallel secondary pumps, a load unit, and a bypass pipe, the secondary pumps being connected to the load unit, and the bypass pipe forming a loop structure with the secondary pumps and the load unit; the primary pump pipeline is connected to the secondary pump pipeline; the primary pump pipeline is controlled by: collecting the flow rate of each bypass pipe in the secondary pump pipeline; and adjusting the frequency of the primary pump so that the flow rate of at least one bypass pipe approaches 0. The solution lacks an integrated sensor array across pump stations, making it impossible to acquire hydraulic parameters of each pump station in real time. This results in imbalances or malfunctions not being detected in a timely manner. Furthermore, the absence of distributed actuators prevents each pump station from independently adjusting flow and pressure, forcing them to passively respond through unified adjustment. This leads to low efficiency in adaptive adjustment of abnormal pump stations. Utility Model Content

[0005] This utility model aims to provide a multi-stage pump linkage control system, which effectively solves the problems of lacking an integrated sensor array across pump stations, making it impossible to obtain the hydraulic parameters of each pump station in real time, resulting in the inability to detect imbalances or faults in a timely manner. At the same time, the lack of distributed actuators prevents each pump station from independently adjusting its flow and pressure, and can only passively respond through unified adjustment, resulting in low efficiency in adaptive adjustment of abnormal pump stations. The system can automatically identify the fault source and trigger the coordinated adjustment of the actuator parameters, significantly improving the adaptive adjustment efficiency of the multi-stage pump station system.

[0006] This application provides the following technical solution:

[0007] The multi-stage pump linkage control system includes multi-stage pump stations connected in series, water pipelines connecting adjacent pump stations, controllers, and sensor arrays, abnormal state identification circuits, and actuators that are electrically connected to the controllers.

[0008] The controller is used to receive the operating parameters of each level of pump station in the sensor array. The controller is also used to send the operating parameters to the abnormal state identification circuit to perform fault identification. The controller is also used to generate parameter adjustment instructions based on the abnormal signal output by the abnormal state identification circuit. The controller is also used to control the actuator to execute the parameter adjustment instructions.

[0009] In this utility model's technical solution, the controller receives real-time operating parameters from various levels of pump stations via a sensor array. After acquiring these parameters, the controller first transmits them to an abnormal state identification circuit via an internal data bus. This circuit consists of a comparator, a threshold storage unit, and logic gates. The threshold storage unit stores preset safety threshold ranges for different operating parameters. After receiving the real-time parameters from the controller, the comparator immediately compares them item by item with the corresponding preset thresholds in the threshold storage unit. If the real-time parameters are within the threshold range, the system is considered normal; otherwise, it is considered abnormal. When the comparator detects an abnormal parameter, it triggers the logic gate circuit, integrating one or more abnormal signals into a unified abnormal identification signal, which is then fed back to the controller via an electrical connection. Upon receiving the abnormal signal, the controller generates parameter adjustment instructions based on preset logic rules. Subsequently, the controller drives the corresponding equipment to complete the instruction actions through the actuator, thereby automatically identifying the fault source and triggering the actuator's parameter coordination adjustment. This effectively prevents system instability caused by fault propagation and significantly improves the adaptive adjustment efficiency of the multi-level pump station system.

[0010] Furthermore, it also includes a data storage module, which is electrically connected to the controller. The data storage module includes a parameter storage unit and a clock unit. The parameter storage unit is used to record the operating parameters collected by the sensor array and the instruction information generated by the controller according to the time series. The clock unit is used to add an absolute time identifier to the data stored in the parameter storage unit.

[0011] By using a time-series recording method in the parameter storage unit, the controller can accurately trace the operating parameters and command information at each moment through absolute time stamps. When an abnormal state occurs in a multi-level pumping station, the controller can call the historical records with absolute timestamps in the data storage module, compare the sensor parameter change trajectory with the controller command execution sequence through the time axis, quickly locate the time point of the fault and related operations, and use absolute time stamps to achieve spatiotemporal alignment of operating data between multi-level pumping stations, providing a quantifiable timing reference for the controller to optimize multi-level linkage control logic.

[0012] Furthermore, the parameter storage unit is a non-volatile memory, the data interface of the non-volatile memory is connected to the data bus of the controller, the clock unit is a real-time clock chip, and the time signal output terminal of the real-time clock chip is connected to the timestamp write port of the non-volatile memory.

[0013] By combining non-volatile memory with a real-time clock chip, the monitoring data can be fully preserved even when power is lost or the system is restarted. The data is precisely bound to absolute time through the timestamp writing port, providing a reliable basis for equipment status backtracking, fault timeline analysis, and maintenance cycle calibration.

[0014] Furthermore, the abnormal state identification circuit includes a comparator, a threshold storage unit, and a logic gate electrically connected to the controller. The controller is used to transmit the operating parameters collected by the sensor array to the comparator through a data bus. The comparator is used to compare the operating parameters with the preset threshold in the threshold storage unit. The comparator is also used to trigger the logic gate to output an abnormal signal to the controller when the limit is exceeded. The controller is also used to generate parameter adjustment instructions based on the abnormal signal.

[0015] By linking the comparator and threshold storage unit in the abnormal state identification circuit at the hardware level, the controller can directly inject the operating parameters collected by the sensor array into the comparator via the data bus. The comparator compares the parameters with the preset quantization thresholds in the threshold storage unit in real time. When the operating parameters exceed the threshold boundary, the comparator immediately activates the logic gate to integrate the over-limit signal in a timely manner, generating an abnormal signal carrying a fault feature code and sending it back to the controller. This abnormal signal triggers the controller to convert the abstract abnormal signal into specific equipment adjustment instructions through a preset parameter adjustment algorithm, forming a closed-loop control link from parameter acquisition to execution correction. The digital standard of the threshold storage unit ensures the objectivity of fault judgment, and the spatiotemporal correlation analysis of multi-parameter abnormal signals using logic gates avoids false alarms due to a single threshold exceeding the limit. Ultimately, the controller can accurately match the preset adjustment strategy template based on the triggering timing and parameter type of the abnormal signal, improving the accuracy of fault identification.

[0016] Furthermore, the threshold storage unit is a voltage divider network composed of a series resistor and an adjustable potentiometer, the voltage divider network is used to set the reference voltage, and the logic gate is a diode bridge circuit.

[0017] The reference voltage is set by a voltage divider network consisting of a series resistor and an adjustable potentiometer, which enables flexible threshold adaptation. The over-limit signal is quickly shaped and logically combined by a diode bridge circuit, which effectively suppresses analog signal fluctuation interference. At the same time, it supports parallel judgment of multiple parameter thresholds, which significantly improves the accuracy of fault identification.

[0018] Furthermore, the actuator includes an actuator interface connected to the control terminal of each level of pumping station, and a signal conversion unit and an instruction parsing unit electrically connected to the actuator interface. The instruction parsing unit is used to receive and parse parameter adjustment instructions through the controller. The signal conversion unit is used to generate a corresponding pulse width modulation signal based on the parsing result of the instruction parsing unit. The actuator interface is used to send the pulse width modulation signal to the control terminal of the abnormal pumping station and the control terminal of the downstream pumping station to execute the parameter adjustment instructions.

[0019] By directly connecting the actuator interface to the pump station control terminal in hardware, combined with the accurate identification of parameter adjustment commands by the command parsing unit and the dynamic generation of pulse width modulation signals by the signal conversion unit, seamless adaptation between parameter adjustment commands and actuators can be achieved, avoiding equipment malfunctions caused by incorrect signal formats and significantly improving the accuracy of parameter adjustment in multi-stage pump station systems.

[0020] Furthermore, the sensor array includes one or more of the following: pressure sensor, water level sensor, temperature sensor, flow sensor, voltage sensor, current sensor, and vibration sensor.

[0021] By using multi-parameter collaborative monitoring of pressure sensors, water level sensors, temperature sensors, flow sensors, voltage sensors, current sensors, and vibration sensors, the pressure distribution, liquid level changes, heat load status, fluid dynamic characteristics, voltage, current, and mechanical vibration characteristics of the pumping station can be obtained in real time, forming a multi-dimensional operational profile and significantly improving the accuracy of abnormal operating condition identification.

[0022] Furthermore, it also includes a wireless communication module, a server, and a remote management terminal. The remote management terminal is used to establish a data connection with the server through the wireless communication module. The server is used to connect with the pump station signal through the wireless communication module. The remote management terminal is used to send control signals containing start / stop commands and parameter configuration data to the server through the wireless communication module. The server is used to parse the control signals and send the parsing results to the controller.

[0023] By establishing a data link between the remote management terminal and the server through a wireless communication module, and combining the signal relay mechanism between the server and the pumping station, remote centralized control across regions can be achieved. The start / stop commands and parameter configuration data sent by the remote management terminal based on the wireless communication module are parsed by the server and sent to the controller, which significantly shortens the response cycle. At the same time, the wireless channel replaces on-site wiring, reducing the deployment and maintenance costs of multi-level pumping station systems.

[0024] Furthermore, the wireless communication module includes one or more of the following: WiFi module, Bluetooth module, Zigbee module, 4G network communication module, and 5G network communication module.

[0025] By integrating multiple communication methods that can be selected or combined, it has the flexibility to adapt to different communication needs.

[0026] Furthermore, it also includes an alarm module, which is electrically connected to the controller. The alarm module includes an alarm triggering unit and a signal transmission unit. The alarm triggering unit is used to receive abnormal signals output by the abnormal state identification circuit. The signal transmission unit is equipped with audible and visual alarm devices connected to each level of pump station. The signal transmission unit is used to drive the corresponding audible and visual alarm devices according to the abnormal signals and generate alarm data packets.

[0027] By capturing abnormal signals in real time through the alarm triggering unit and analyzing the abnormal signals through the signal transmission unit, the corresponding audible and visual alarm devices can be driven to achieve accurate location and warning. At the same time, alarm data packets with time and space tags are generated to improve the timeliness of fault response. Attached Figure Description

[0028] Figure 1 This is a logic block diagram of the multi-stage pump linkage control system of this utility model. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] like Figure 1 As shown, it is a logic block diagram of the multi-stage pump linkage control system of this utility model, including multi-stage pump stations connected in series, water pipelines connecting adjacent pump stations, controllers, and sensor arrays, abnormal state identification circuits, and actuators that are electrically connected to the controllers.

[0031] In this embodiment, the multi-stage pump is a three-stage pumping station, which draws water from the floating pumping station on the riverbank, and then pumps it through the second-stage and third-stage pumping stations before finally delivering it to the high-level water tank.

[0032] The floating water intake pumping station has a water intake capacity of Q = 270 m³ / h, static height H = 21.6 m, and length L = 94 m. After comprehensive comparison, three QW-type submersible sewage pumps (model 150QW240-37-45) were selected, with a capacity of Q = 240 m³ / h, height H = 37 m, and power P = 45 kW, with two in operation and one on standby. The floating water intake pumping station adopts a steel structure with design dimensions of 9.0 m × 4.8 m × 4.5 m (length × width × height).

[0033] The secondary pumping station has a water intake capacity of Q = 270 m³ / h, static height (H) = 163 m, and flow rate (L) = 2156 m. After comprehensive comparison, three D155-30×8 multistage centrifugal pumps are selected, with a capacity of Q = 155 m³ / h, static height (H) = 240 m, and power (P) = 180 kW, with two in operation and one on standby. The secondary pumping station adopts a frame structure with design dimensions of 10.3 m × 5.8 m × 5.16 m (length × width × height).

[0034] The water intake of the tertiary pumping station is Q = 270 m³ / h, H_static = 130 m, and L = 2334 m. After comprehensive comparison, three D155-30×7 multistage centrifugal pumps are selected, with Q = 155 m³ / h, H = 210 m, and P = 155 kW, two in operation and one on standby. The tertiary pumping station adopts a frame structure with design dimensions of: length × width × height = 10.3 m × 5.8 m × 5.16 m.

[0035] The controller uses a PLC, which stands for Programmable Logic Controller, preferably a Siemens S7-1500 PLC.

[0036] The sensor array monitors the operating parameters and environmental data of pumping stations at all levels in real time. The sensor array includes one or more of the following: pressure sensor, water level sensor, temperature sensor, flow sensor, voltage sensor, current sensor, and vibration sensor. In this embodiment, the sensor array includes a pressure sensor, water level sensor, temperature sensor, flow sensor, voltage sensor, current sensor, and vibration sensor. Specifically, the pressure sensor is a WIKA pressure sensor, the water level sensor is a Haiying ultrasonic level sensor, the temperature sensor is a K-type thermocouple temperature sensor, the flow sensor is a WIKA ultrasonic flow meter, the voltage sensor is an OMRON resistive voltage divider sensor, the current sensor is a Honeywell Hall effect current sensor, and the vibration sensor is a CB piezoelectric vibration sensor.

[0037] Specifically, pressure sensors, water level sensors, temperature sensors, flow sensors, and vibration sensors are deployed at each level of the pumping station. Sensor signals are converted into digital signals via an ADC converter, with a sampling frequency of 100Hz. Operating parameters and environmental data are transmitted to the controller via an I2C / SPI bus. In this embodiment, the ADC converter is an ADS1256.

[0038] The controller is also used to send operating parameters to the abnormal state identification circuit for fault identification. The controller is also used to generate parameter adjustment instructions based on the abnormal signals output by the abnormal state identification circuit. In this embodiment, the abnormal state identification circuit includes a comparator, a threshold storage unit, and logic gates electrically connected to the controller. The controller transmits the operating parameters collected by the sensor array to the comparator via a data bus. The comparator compares the operating parameters with preset thresholds in the threshold storage unit. The comparator also triggers the logic gates to output an abnormal signal to the controller when a limit is exceeded. The controller further generates parameter adjustment instructions based on the abnormal signal. The threshold storage unit is a voltage divider network composed of a series resistor and an adjustable potentiometer. The voltage divider network is used to set a reference voltage. The logic gates are diode bridge circuits.

[0039] In this embodiment, the preset thresholds should include the key parameter ranges for pump station operation, such as: voltage threshold (200V-240V), current threshold (5A-15A), temperature threshold (-10℃-80℃), and pressure threshold (0.2MPa-1.0MPa). Specific values ​​need to be set according to the equipment specifications. The controller connects to a sensor array consisting of a MAX31865 platinum resistance temperature sensor, an MPX5700DP pressure sensor, and an ADXL355 accelerometer via a parallel bus interface to collect real-time temperature, pressure, and vibration parameters during industrial equipment operation. The core component of the abnormal state identification circuit uses TI's TLV3704 low-power comparator. Its positive input receives analog signal parameters transmitted by the controller via a 16-bit data bus, while its negative input is connected to a voltage divider network consisting of a KOASpeer RK73H2ATTD resistor (0.1% accuracy) and an MCP41HVX1 series digital potentiometer. The reference voltage threshold in the range of 0-3.3V can be programmably set via the I2C interface.

[0040] The voltage divider network consists of a series resistor R1 = 10kΩ (0.1% accuracy) and an adjustable potentiometer RP1 = 100kΩ. Adjusting RP1 provides an adjustable reference voltage from 0-3.0V. When the TLV3704 detects that the input parameter exceeds the set threshold, its open-drain output is immediately pulled low, triggering a bridge rectifier circuit composed of BAS40-04 high-speed diodes or a switching circuit composed of 2N7002K MOSFETs. This generates a 3.3V abnormal signal, which is input to the controller via the INT0 interrupt pin. The RA6M5GK324's built-in 12-bit SAR ADC continuously monitors this signal level. After triggering the interrupt, it calculates compensation parameters in real time using its internal PID control algorithm, generating a PWM signal with an adjustable duty cycle, which is then output to the actuator via the MTU3 timer module. The entire circuit uses a TPS7A8300RGWR linear regulator to provide a 3.3V power supply. A 100nF X7R ceramic capacitor (GRM188R71H104KA93D) and a 10μF type A tantalum capacitor (TAJD106M010RNJ) are connected in parallel with ground to the comparator reference voltage pin for power filtering to ensure signal stability. To enhance anti-interference capabilities, the data bus uses an ADUM1402 digital isolator for electrical isolation. The comparator output drives subsequent logic circuits through an SN74LVC1G125 buffer. Upon system power-up, the controller initializes the MCP41HVX1 potentiometer via the I2C interface, setting a default threshold. During operation, the threshold parameter can be dynamically adjusted according to process requirements to achieve adaptive fault detection.

[0041] The controller is also used to control the actuators to execute parameter adjustment commands. The actuators include actuator interfaces connected to the control terminals of each level of pumping station, and signal conversion units and command parsing units electrically connected to the actuator interfaces. The command parsing unit is used to receive and parse parameter adjustment commands through the controller, and the signal conversion unit is used to generate corresponding pulse width modulation signals based on the parsing results of the command parsing unit. The actuator interfaces are used to send the pulse width modulation signals to the control terminals of abnormal pumping stations and downstream pumping stations to execute parameter adjustment commands.

[0042] In this embodiment, the actuator interface uses a Siemens ET200SP distributed I / O module, configured with an 8-channel digital output submodule, and connects to the Profinet bus of the pump station control terminals (such as frequency converters and soft starters) via an M12 aviation connector. Each channel is equipped with an independent opto-isolation circuit (model TLP290-4) to ensure signal anti-interference capability. The instruction parsing unit uses an STM32F103C8T6 microcontroller, equipped with a Modbus TCP protocol stack, and receives upper computer parameter instructions through a W5500 Ethernet chip. The parsing logic includes: instruction header verification (0xAA55), pump station address matching, and adjustment amount conversion (converting percentage instructions into a numerical range of 0-4095). The signal conversion unit uses an AD5667R digital-to-analog converter (16-bit resolution) to convert the parsed digital quantity into an analog voltage signal, which is then used by a PCA9685 PWM controller (12-bit precision) to generate a pulse signal with an adjustable duty cycle. Key parameter settings for the PCA9685 PWM controller: PWM frequency 1kHz, dead time 2μs, and device cascading control via I2C bus.

[0043] It also includes a wireless communication module, a server, and a remote management terminal. The remote management terminal is used to establish a data connection with the server through the wireless communication module. The server is used to connect to the pump station signal through the wireless communication module. The remote management terminal is used to send control signals containing start / stop commands and parameter configuration data to the server through the wireless communication module. The server is used to parse the control signals and send the parsing results to the controller. The wireless communication module includes one or more of the following: WiFi module, Bluetooth module, Zigbee module, 4G network communication module, and 5G network communication module. In this embodiment, the wireless communication module includes a WiFi module and a Bluetooth module.

[0044] Specifically, it also includes a data storage module electrically connected to the controller. The data storage module includes a parameter storage unit and a clock unit. The parameter storage unit records the operating parameters collected by the sensor array and the command information generated by the controller according to a time series. The clock unit adds an absolute time stamp to the data stored in the parameter storage unit. The parameter storage unit is a non-volatile memory, and its data interface is connected to the controller's data bus. The clock unit is a real-time clock chip, and its time signal output is connected to the timestamp write port of the non-volatile memory.

[0045] In this embodiment, the parameter storage unit uses a Fujitsu MB85RS2MT type FRAM memory with a capacity of 2Mbit, which is connected to the controller via an SPI bus. Its ferroelectric storage medium supports 10... 13 The read / write cycle is sequential, and the data interface is compatible with the controller's FSMC bus. Sensor data (such as pressure / flow values) and control commands (such as inverter adjustment values) are stored in ISO 8601 time sequence, with each record containing a 16-bit CRC checksum. The clock unit uses an EPSON RX8025SA real-time clock chip with a built-in 32.768kHz temperature-compensated crystal oscillator and a CR2032 coin cell battery as a backup power source. It connects to the controller via an I2C interface, and the time signal output (INT pin) is directly connected to the TS_IN port of the FRAM to achieve nanosecond-level time synchronization. For example, when the level sensor of pump station #2 detects a sudden change in liquid level, the ADC conversion value is processed by the controller to generate an adjustment command. The RX8025SA provides a timestamp via I2C, and the MB85RS2MT stores a 24-byte data packet containing this timestamp (4 bytes of sensor value + 4 bytes of control value + 16 bytes of time field) via the SPI bus. The storage address automatically increments to form a continuous time sequence.

[0046] Specifically, it also includes an alarm module, which is electrically connected to the controller. The alarm module includes an alarm triggering unit and a signal transmission unit. The alarm triggering unit is used to receive abnormal signals output by the abnormal state identification circuit. The signal transmission unit is equipped with audible and visual alarm devices connected to each level of pump station. The signal transmission unit is used to drive the corresponding audible and visual alarm devices according to the abnormal signals and generate alarm data packets.

[0047] In this embodiment, the alarm triggering unit uses a Siemens 6ES7223-1PH30-0XB0 digital input module, configured with a 16-channel 24V DC input interface. When the abnormal state identification circuit outputs a TTL level abnormal signal, it is connected to the PLC input terminal through an optocoupler isolation circuit. For example, when the bearing temperature of pump station #3 exceeds 85℃, the PT100 sensor outputs a high-level abnormal signal to channel I0.6 via the MAX31865 conversion module. The signal transmission unit includes a Siemens 6GK7243-1BX30-0XE0 communication module and a solid-state relay group. The 6GK7243-1BX30-0XE0 communication module is connected to the host computer via a PROFINET bus and has a built-in TCP / IP protocol stack to generate structured alarm data packets (including timestamps, device IDs, and fault codes). The solid-state relay group (such as Omron G3NA-210B) drives the audible and visual alarm device, and each pump station is configured with an independent control loop. The audible and visual alarm device uses the Siemens SIRIUS ACT A2U010 series, which includes a red high-brightness LED light group (100cd / m²) and a 90dB buzzer. It is powered by 24V DC, and the control signal uses an NPN open-collector output with a response time of 50ms. For example, when a low oil level fault occurs at pump station #5, the PLC receives an abnormal signal from channel I1.2 of the digital input module, immediately triggering the output of channel Q0.5 to drive the corresponding solid-state relay at pump station #5, illuminating the red warning light and activating the buzzer. Simultaneously, the communication module sends a JSON-formatted alarm packet to the host computer.

[0048] The above are merely embodiments of this utility model. This utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are able to access all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims. The specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A multi-stage pump linkage control system, comprising multi-stage pump stations connected in series and water pipelines connecting adjacent pump stations, characterized in that: It also includes a controller and a sensor array, an abnormal state recognition circuit, and an actuator, all of which are electrically connected to the controller. The controller is used to receive the operating parameters of each level of pump station in the sensor array. The controller is also used to send the operating parameters to the abnormal state identification circuit to perform fault identification. The controller is also used to generate parameter adjustment instructions based on the abnormal signal output by the abnormal state identification circuit. The controller is also used to control the actuator to execute the parameter adjustment instructions.

2. The multi-stage pump linkage control system according to claim 1, characterized in that: It also includes a data storage module, which is electrically connected to the controller. The data storage module includes a parameter storage unit and a clock unit. The parameter storage unit is used to record the operating parameters collected by the sensor array and the instruction information generated by the controller according to the time series. The clock unit is used to add an absolute time identifier to the data stored in the parameter storage unit.

3. The multi-stage pump linkage control system according to claim 2, characterized in that: The parameter storage unit is a non-volatile memory, and the data interface of the non-volatile memory is connected to the data bus of the controller. The clock unit is a real-time clock chip, and the time signal output terminal of the real-time clock chip is connected to the timestamp write port of the non-volatile memory.

4. The multi-stage pump linkage control system according to claim 1, characterized in that: The abnormal state identification circuit includes a comparator, a threshold storage unit, and a logic gate electrically connected to the controller. The controller is used to transmit the operating parameters collected by the sensor array to the comparator through a data bus. The comparator is used to compare the operating parameters with the preset threshold in the threshold storage unit. The comparator is also used to trigger the logic gate to output an abnormal signal to the controller when the limit is exceeded. The controller is also used to generate parameter adjustment instructions based on the abnormal signal.

5. The multi-stage pump linkage control system according to claim 4, characterized in that: The threshold storage unit is a voltage divider network composed of a series resistor and an adjustable potentiometer. The voltage divider network is used to set the reference voltage. The logic gate is a diode bridge circuit.

6. The multi-stage pump linkage control system according to claim 1, characterized in that: The actuator includes an actuator interface connected to the control terminal of each pumping station, and a signal conversion unit and an instruction parsing unit electrically connected to the actuator interface. The instruction parsing unit is used to receive and parse parameter adjustment instructions through the controller. The signal conversion unit is used to generate a corresponding pulse width modulation signal based on the parsing result of the instruction parsing unit. The actuator interface is used to send the pulse width modulation signal to the control terminal of the abnormal pumping station and the control terminal of the downstream pumping station to execute the parameter adjustment instructions.

7. The multi-stage pump linkage control system according to claim 1, characterized in that: The sensor array includes one or more of the following: pressure sensor, water level sensor, temperature sensor, flow sensor, voltage sensor, current sensor, and vibration sensor.

8. The multi-stage pump linkage control system according to claim 1, characterized in that: It also includes a wireless communication module, a server, and a remote management terminal. The remote management terminal is used to establish a data connection with the server through the wireless communication module. The server is used to connect with the pump station signal through the wireless communication module. The remote management terminal is used to send control signals containing start / stop commands and parameter configuration data to the server through the wireless communication module. The server is used to parse the control signals and send the parsing results to the controller.

9. The multi-stage pump linkage control system according to claim 8, characterized in that: The wireless communication module includes one or more of the following: WiFi module, Bluetooth module, Zigbee module, 4G network communication module, and 5G network communication module.

10. The multi-stage pump linkage control system according to claim 1, characterized in that: It also includes an alarm module, which is electrically connected to the controller. The alarm module includes an alarm triggering unit and a signal transmission unit. The alarm triggering unit is used to receive abnormal signals output by the abnormal state identification circuit. The signal transmission unit is equipped with audible and visual alarm devices connected to each level of pump station. The signal transmission unit is used to drive the corresponding audible and visual alarm devices and generate alarm data packets according to the abnormal signals.

Images