CN-224232119-U - Feed premixing closed-loop control system with variable-frequency auger and weighing sensor linked

CN224232119UCN 224232119 UCN224232119 UCN 224232119UCN-224232119-U

Abstract

The utility model discloses a feed premixing closed-loop control system with a variable-frequency auger and a weighing sensor in linkage, which is characterized by comprising the following components: the device comprises a storage control module, a variable frequency driving module, a weighing sensing module, a central control module and a communication network module. The central control module is connected with the storage control module, the variable frequency driving module and the weighing sensing module, the storage control module, the variable frequency driving module and the weighing sensing module are connected through an RS-485 bus, the central control module is used as a master node of the RS-485 bus, the storage control module, the variable frequency driving module and the weighing sensing module are used as slave nodes, and the communication network module is connected with the central control module through a UART interface. Closed-loop control improves mixing precision, ensures feed quality, ensures data safety through redundant communication design, improves production efficiency through intelligent anti-blocking, saves energy and reduces consumption through variable frequency speed regulation, prolongs equipment service life, and is convenient to manage in remote operation and maintenance and improves management efficiency.

Inventors

REN JIE
REN MIAOYANG
YAN ZHIQIANG
ZHANG YUNLONG
LIU WEITAO
XU PENG
HE YINPENG
LI MINGCHAO
XI SHUAIDI

Assignees

禹州市华电瑞天电气有限公司

Dates

Publication Date: 20260512
Application Date: 20250710

Claims (6)

1. The feed premixing closed-loop control system with the linkage of the variable-frequency auger and the weighing sensor is characterized by comprising a storage control module, a variable-frequency driving module, a weighing sensor module, a central control module and a communication network module; The central control module is connected with the storage control module, the variable frequency driving module and the weighing sensing module, the storage control module, the variable frequency driving module and the weighing sensing module are connected through an RS-485 bus, the central control module is used as a master node of the RS-485 bus, the storage control module, the variable frequency driving module and the weighing sensing module are used as slave nodes, and the communication network module is connected with the central control module through a UART interface.
2. The feed premixing closed-loop control system with the variable-frequency auger and the weighing sensor linked as claimed in claim 1, wherein the feed premixing closed-loop control module comprises an STM32F103 microprocessor, a material level sensor, an analog-to-digital converter, a buzzer, an LED lamp, an NPN triode Q1, an electromagnetic valve, a relay, a resistor R1, a resistor R2 and a resistor R3; The output signal pin of the material level sensor is connected with the analog input pin of the analog-to-digital converter, the digital output pin of the analog-to-digital converter is connected with the communication pin of the STM32F103 microprocessor, the positive electrode of the buzzer is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the control pin of the STM32F103 microprocessor, the negative electrode of the buzzer is connected with the collector of the NPN triode Q1, the LED lamp is connected at the two ends of the buzzer in parallel, the emitter of the NPN triode Q1 is grounded, the base of the NPN triode Q1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the other control pin of the STM32F103 microprocessor, the power input pin of the electromagnetic valve is connected with the input power supply 24V, the output end of the electromagnetic valve is connected with the normally open contact of the relay, one end of the coil of the relay is connected with the input power supply 5V, the other end of the coil of the relay is connected with one end of the resistor R3, and the other end of the resistor R3 is connected with the GPIO pin of the STM32F103 microprocessor.
3. The feed premixing closed-loop control system with the linkage of the variable-frequency auger and the weighing sensor according to claim 2 is characterized in that the variable-frequency driving module comprises a variable-frequency auger motor, a frequency converter, a fuse, a TVS diode, a thermal relay, a Hall sensor and a Schmidt trigger; The power input port of the frequency converter is connected with a three-phase alternating current power supply, the three-phase winding of the frequency conversion auger motor is connected with the output port of the frequency converter, the analog output terminal of the frequency converter is connected with the PWM output pin of the STM32STM32F103 microprocessor, the fuse is connected between the power input port of the frequency converter and the power input port of the frequency converter in series, the TVS diode is connected in parallel with the power input port of the frequency converter, the thermal relay is connected in series in the power circuit of the frequency conversion auger motor, the normally closed contact of the thermal relay is connected with the fault input port of the frequency converter, the Hall sensor is arranged on the frequency conversion auger motor, the output signal end of the Hall sensor is connected with the input end of the Schmitt trigger, and the output end of the Schmitt trigger is connected with the STM32F103 microprocessor.
4. The feed premixing closed-loop control system with the variable-frequency auger and the weighing sensor linked as claimed in claim 3, wherein the central control module comprises an STM32H743 microcontroller, a touch screen, an RA8875 driving chip, a touch detection chip, an SD card and an SD card protection switch; The touch screen is connected with the RA8875 driving chip and the touch detection chip, the RA8875 driving chip is connected with the STM32H743 microcontroller through a UART interface, the SD card is connected with the STM32H743 microcontroller through an SPI interface, the other end of the SD card is connected with the SD card protection switch, and the power pin of the SD card is connected with the input power supply 3.3V; The VCC pin of the touch detection chip is connected with 3.3V of an input power supply, the SCL pin of the touch detection chip is connected with the PB6 pin of the STM32H743 microcontroller, and the SDA pin of the touch detection chip is connected with the PB7 pin of the STM32H743 microcontroller.
5. The feed premixing closed loop control system with the variable frequency auger and the weighing sensor linked as claimed in claim 4, wherein the weighing sensor module comprises an HX711 chip, a programmable memory, a weighing sensor and a calibration potentiometer; The weighing sensor is connected with an A+ pin of the HX711 chip and an A-pin of the HX711 chip, an SCK pin of the HX711 chip and a DT pin of the HX711 chip are connected with an SPI1 interface of the STM32H743 microcontroller, an SCL pin of the programmable memory and an SDA pin of the programmable memory are connected with an I 2 C interface corresponding to the STM32H743 microcontroller, and a regulating end of the calibration potentiometer is connected with a gain regulating pin of the HX711 chip.
6. The feed premixing closed loop control system with the variable frequency auger and the weighing sensor linked as claimed in claim 5, wherein the communication network module comprises a wireless communication module, a first optocoupler isolation, a second optocoupler isolation, an ESD protection diode, a filter capacitor C1, a capacitor C2, a capacitor C3, an inductor L1, an inductor L2, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an antenna, a first MAX485 chip, a second MAX485 chip, a third MAX485 chip and a fourth MAX485 chip; The wireless communication module is respectively connected with one end of an ESD protection diode, one end of an inductor L1 and one end of a filter capacitor C1, the other end of the ESD protection diode is connected with a UART interface of an STM32H743 microcontroller, the other end of the filter capacitor C1 is connected with an input power supply, the other end of the inductor L1 is connected with one end of an inductor L2 and one end of a capacitor C2, the other end of the capacitor C2 is connected with the ground, the other end of the inductor L2 is connected with an antenna and one end of the capacitor C3, the other end of the capacitor C3 is connected with the ground, a first optocoupler is connected in series with an A line of an RS-485 bus, and a second optocoupler is connected in series with a B line of the RS-485 bus; The receiver output end of the first MAX485 chip is connected with the PA11 pin of the STM32H743 microcontroller, the driver input end of the first MAX485 chip is connected with the PA12 pin of the STM32H743 microcontroller, the receiver enabling end of the first MAX485 chip and the driver enabling end of the first MAX485 chip are connected with the PA15 pin of the STM32H743 microcontroller, the A line of the first MAX485 chip is connected with the A line of the RS-485 bus in series through a resistor R5, the B line of the first MAX485 chip is connected with the B line of the RS-485 bus in series through a resistor R6, a resistor R4 is connected between the A line of the bus and the B line of the bus in parallel, the power positive electrode of the first MAX485 chip is connected with an input power supply 5V, and the power negative electrode of the first MAX485 chip is connected with the ground; The receiver output end of the second MAX485 chip is connected with the PD9 pin of the STM32H743 microcontroller, the driver input end of the second MAX485 chip is connected with the PD8 pin of the STM32H743 microcontroller, the receiver enabling end of the second MAX485 chip and the driver enabling end of the second MAX485 chip are connected with the PD7 pin of the STM32H743 microcontroller, the A line of the second MAX485 chip is connected with the A line of the RS-485 bus in series through a resistor R7, the B line of the second MAX485 chip is connected with the B line of the RS-485 bus in series through a resistor R8, the power positive electrode of the second MAX485 chip is connected with an input power source 5V, and the power negative electrode of the second MAX485 chip is connected with the ground; The receiver output end of the third MAX485 chip is connected with the PB11 pin of the STM32F103 microcontroller, the driver input end of the third MAX485 chip is connected with the PB10 pin of the STM32F103 microprocessor, the receiver enabling end of the third MAX485 chip and the driver enabling end of the third MAX485 chip are connected with the PB1 pin of the STM32F103 microprocessor, the A line of the third MAX485 chip is connected with the A line of the RS-485 bus in series through a resistor R9, the B line of the third MAX485 chip is connected with the B line of the RS-485 bus in series through a resistor R10, the power positive electrode of the third MAX485 chip is connected with an input power source 5V, and the power negative electrode of the third MAX485 chip is connected with the ground; The receiver output end of the fourth MAX485 chip is connected with the PA3 pin of the STM32F103 microprocessor, the driver input end of the fourth MAX485 chip is connected with the PA2 pin of the STM32F103 microprocessor, the receiver enabling end of the fourth MAX485 chip and the driver enabling end of the fourth MAX485 chip are connected with the PA1 pin of the STM32F103 microprocessor, the A line of the fourth MAX485 chip is connected with the A line of the RS-485 bus in series through a resistor R11, the B line of the fourth MAX485 chip is connected with the B line of the RS-485 bus in series through a resistor R12, the positive power supply of the fourth MAX485 chip is connected with the 5V input power supply, and the negative power supply of the fourth MAX485 chip is connected with the ground.

Description

Feed premixing closed-loop control system with variable-frequency auger and weighing sensor linked Technical Field The utility model belongs to the technical field of closed-loop control, and relates to a feed premixing closed-loop control system with a variable-frequency auger and a weighing sensor in linkage. Background In the feed production process, accurate mixing is important. Traditional fodder compounding system often has compounding precision low, unable remote monitoring, equipment easily putty, the high scheduling problem of energy consumption. For example, part of the system cannot detect the weight of the storage tank in real time to calibrate the mixing proportion, so that the proportion error of feed ingredients is large, when equipment is blocked, the equipment cannot be found and processed in time, the production efficiency is affected, and meanwhile, due to the lack of a remote monitoring function, a manager cannot master the production state in time, and the production parameters cannot be adjusted in time. In addition, the high energy consumption not only increases the production cost, but also does not conform to the concept of green production. Therefore, the development of the feed premixing closed-loop control system which is high in precision, intelligent, energy-saving and has the remote monitoring function has important practical significance. Disclosure of Invention In order to solve the problems in the background technology, the utility model provides a feed premixing closed-loop control system with a variable-frequency auger and a weighing sensor in linkage. In order to achieve the aim, the utility model adopts the following technical scheme that the feed premixing closed-loop control system with the linkage of the variable-frequency auger and the weighing sensor comprises a storage control module, a variable-frequency driving module, a weighing sensor module, a central control module and a communication network module; The central control module is connected with the storage control module, the variable frequency driving module and the weighing sensing module, the storage control module, the variable frequency driving module and the weighing sensing module are connected through an RS-485 bus, the central control module is used as a master node of the RS-485 bus, the storage control module, the variable frequency driving module and the weighing sensing module are used as slave nodes, and the communication network module is connected with the central control module through a UART interface. The storage control module comprises an STM32F103 microprocessor, a material level sensor, an analog-to-digital converter, a buzzer, an LED lamp, an NPN triode Q1, an electromagnetic valve, a relay, a resistor R1, a resistor R2 and a resistor R3; The output signal pin of the material level sensor is connected with the analog input pin of the analog-to-digital converter, the digital output pin of the analog-to-digital converter is connected with the communication pin of the STM32F103 microprocessor, the positive electrode of the buzzer is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the control pin of the STM32F103 microprocessor, the negative electrode of the buzzer is connected with the collector of the NPN triode Q1, the LED lamp is connected at the two ends of the buzzer in parallel, the emitter of the NPN triode Q1 is grounded, the base of the NPN triode Q1 is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the other control pin of the STM32F103 microprocessor, the power input pin of the electromagnetic valve is connected with the input power supply 24V, the output end of the electromagnetic valve is connected with the normally open contact of the relay, one end of the coil of the relay is connected with the input power supply 5V, the other end of the coil of the relay is connected with one end of the resistor R3, and the other end of the resistor R3 is connected with the GPIO pin of the STM32F103 microprocessor. The variable frequency driving module comprises a variable frequency auger motor, a frequency converter, a fuse, a TVS diode, a thermal relay, a Hall sensor and a Schmidt trigger; The power input port of the frequency converter is connected with a three-phase alternating current power supply, the three-phase winding of the frequency conversion auger motor is connected with the output port of the frequency converter, the analog output terminal of the frequency converter is connected with the PWM output pin of the STM32STM32F103 microprocessor, the fuse is connected between the power input port of the frequency converter and the power input port of the frequency converter in series, the TVS diode is connected in parallel with the power input port of the frequency converter, the thermal relay is connected in series in the power circuit of the frequency conversion auger motor, the normally