Industrial application water valve actuator circuit for 485 communication

Abstract

The utility model discloses an industrial application water valve actuator circuit for 485 communication, which belongs to the technical field of water valve actuators and comprises a processor unit, a power supply processing circuit, an RS-485 interface circuit, an angle sensor and a motor driving circuit. The other end of the motor driving circuit is connected with the processor unit and the RS-485 interface circuit, and the RS-485 interface circuit, the angle sensor and the motor driving circuit are all connected with the processor unit. The signal connection structure is simple, and the communication efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of water valve actuators, in particular to an industrial application water valve actuator circuit with 485 communication. Background Art

[0002] Water valve actuator refers to a device used to control the opening and closing of water valves. It can help administrators or users to conveniently monitor and control the status of water valves remotely to ensure that the water source is cut off or opened in time in an emergency, thereby ensuring the safety of facilities and personnel. The communication methods of water valve actuators are divided into wireless and wired. The MODBUS protocol only uses two hardware wires, RS485-A and RS485-B. The hardware implementation is simple and the scalability is strong. MODBUS RTU is a serial communication protocol widely used in the industrial field.

[0003] For example, a smart electric actuator disclosed in the patent document with announcement number CN 204406156 U includes a process control system, other bus interfaces, RS-485 interfaces, infrared interfaces, portable controllers, host computers, RS-485 buses, and networked actuators. The process control system is connected to the RS-485 interface through other bus interfaces, the RS-485 interface is connected to the RS-485 bus, the RS-485 bus is connected to the host computer and multiple networked actuators, and the networked actuator is connected to the portable controller through an infrared interface. The utility model has high operability and reliability, and accurate control precision. However, the electric actuator disclosed in the patent document has a RS-485 interface and a host computer that are both connected to the RS-485 bus, and the communication efficiency is low. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art and provides an industrial application water valve actuator circuit with 485 communication.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an industrial application water valve actuator circuit with 485 communication, including a processor unit, a power supply processing circuit, an RS-485 interface circuit, an angle sensor and a motor drive circuit, one end of the power supply processing circuit is connected to an external power supply, and the other end is connected to the processor unit and the RS-485 interface circuit, and the RS-485 interface circuit, the angle sensor and the motor drive circuit are all connected to the processor unit.

[0006] Furthermore, the processor unit includes a main control chip and peripheral circuits, and the main control chip is a highly integrated chip HK32F0301 produced by Hangshun Chip Technology Co., Ltd.

[0007] Furthermore, the angle sensor is a resistive position sensor RDC503051A produced by Alps Alpine.

[0008] Furthermore, the main control chip is connected to the host computer via the RS-485 interface circuit, and the main control chip collects the angle sensor voltage via an ADC module.

[0009] Furthermore, the power processing circuit is connected to a 12V external power supply, and after being protected against reverse connection and overvoltage, is converted into 5V to power the processor unit and the RS-485 interface circuit.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model is based on the industrial application water valve actuator circuit of the serial bus using the MODBUS communication protocol. The RS-485 interface circuit, the angle sensor and the motor drive circuit are all connected to the processor unit. The main control chip is connected to the host computer through the RS-485 interface circuit to achieve fast signal transmission and high communication efficiency, thereby ensuring the execution efficiency of the water valve actuator.

[0012] 2. One end of the power processing circuit of the utility model is connected to the external power supply. After anti-reverse connection and anti-overvoltage protection, the other end is converted into 5V through the power processing circuit to provide a safe and stable power supply for the processor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a connection block diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0015] Example: Figure 1 As shown, an industrial water valve actuator circuit with 485 communication includes a processor unit, a power processing circuit, an RS-485 interface circuit, an angle sensor and a motor drive circuit. One end of the power processing circuit is connected to an external power supply, and the other end is connected to the processor unit and the RS-485 interface circuit. The RS-485 interface circuit, the angle sensor and the motor drive circuit are all connected to the processor unit.

[0016] Specifically, the processor unit includes a main control chip and peripheral circuits. The main control chip is a highly integrated chip HK32F0301 produced by Hangshun Chip Technology Co., Ltd.

[0017] The angle sensor is a resistive position sensor RDC503051A produced by Alps Alpine, which can measure angles of 0 to 333° with high accuracy and has an operating temperature range of -40°C to 120°C.

[0018] The power processing circuit is connected to a 12V external power supply, which is converted to 5V after reverse connection protection and overvoltage protection to power the processor unit and RS-485 interface circuit. The unidirectional conductivity of the diode is used to prevent the reverse connection of the power supply from damaging the device.

[0019] The motor driving circuit plays the role of driving and protecting the motor, and the motor driving chip it uses is the sdc9150sptr-e1 produced by Everbright Core Industry Co., Ltd.

[0020] The main control chip is connected to the host computer through the RS-485 interface circuit, and the host computer is connected to the RS-485 interface circuit through two signal lines, RS485-A and RS485-B. The main control chip receives the control signal sent by the host computer, and obtains the target position through analysis and processing; at the same time, the angle sensor voltage is collected through the ADC module, the actual position is calculated, and the motor is driven to the target position through the motor drive circuit after internal calculation.

[0021] The utility model provides an industrial application water valve actuator circuit based on the MODBUS communication protocol, which can be connected to multiple equipment controls, adopts domestic chips, has low cost, rich functions, and meets most industrial needs.

[0022] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A 485 communication industrial application water valve actuator circuit, characterized in that: It includes a processor unit, a power processing circuit, an RS-485 interface circuit, an angle sensor and a motor drive circuit. One end of the power processing circuit is connected to an external power supply, and the other end is connected to the processor unit and the RS-485 interface circuit. The RS-485 interface circuit, the angle sensor and the motor drive circuit are all connected to the processor unit.

2. The industrial application water valve actuator circuit of 485 communication according to claim 1 is characterized in that: The processor unit includes a main control chip and peripheral circuits.

3. The industrial application water valve actuator circuit of 485 communication according to claim 2 is characterized in that: The angle sensor is a resistive position sensor.

4. The industrial application water valve actuator circuit of 485 communication according to claim 3 is characterized in that: The main control chip is connected to the host computer through the RS-485 interface circuit, and the main control chip collects the angle sensor voltage through the ADC module.

5. The industrial application water valve actuator circuit of 485 communication according to claim 4 is characterized in that: The power processing circuit is connected to a 12V external power supply, and after being protected against reverse connection and overvoltage, is converted into 5V to power the processor unit and the RS-485 interface circuit.

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