Intelligent servo hydraulic station system capable of being remotely monitored and controlled

Abstract

The invention discloses a remotely monitored and controlled intelligent servo hydraulic station system, which comprises a servo hydraulic pump and a servo special oil pump, pressure sensors for detecting the pressure of pressure oil are respectively arranged at the liquid outlet end of the servo hydraulic pump and the liquid outlet end of the servo special oil pump, and the signal transmitting ends of the pressure sensors are electrically connected with the signal receiving end of a pressure controller; the control end of the pressure controller is electrically connected with the control receiving end of the electromagnetic valve, a communication module of the pressure controller is electrically connected with a Wi-Fi module, the Wi-Fi module is in communication connection with a remote monitoring module through the Internet, and the communication module of the pressure controller is in communication connection with the Internet through the Wi-Fi module. A remote monitoring module can receive an oil way pressure value sent by a pressure controller through Blynk software on a mobile phone so as to remotely monitor oil way operation of a servo hydraulic station system, and meanwhile a control instruction can be remotely sent to the pressure controller through a virtual key on a monitoring interface. And the servo driver is driven to start and stop the servo hydraulic pump and the servo special oil pump.

Description

Technical Field

[0001] The present invention relates to the technical field of servo hydraulic stations, and in particular to an intelligent servo hydraulic station system for remote monitoring and control. Background Art

[0002] A servo hydraulic station is a hydraulic device that adjusts the pressure, flow rate, and direction of a hydraulic system through a control system. It usually consists of a hydraulic pump, valves, a fuel tank, actuators, etc., and monitors and controls the working state of the hydraulic system through sensors and a controller to achieve precise motion control. The servo hydraulic station has characteristics such as high precision, high response speed, and programmability, and is commonly used in industrial fields that require precise control, such as machine tools, injection molding machines, punching machines, etc.

[0003] After retrieval, in the prior art, the publication number is CN102635599A, which discloses an integrated servo pump station hydraulic system for a testing machine, including a fuel tank, a main cylinder, a clamping cylinder, and a hydraulic pump connected to the fuel tank. The hydraulic pump is connected to the main cylinder and the clamping cylinder through two parallel pipelines, and a pressure control valve is provided on the pipeline connecting the hydraulic pump and the clamping cylinder, which simply realizes a truly servo and clamping integrated pump station system; speeds up the oil return speed of the system and improves work efficiency. Reduces one set of hydraulic pump stations, reducing product costs; enables the pressures of the two systems to be independent of each other, with stable and reliable performance; saves energy.

[0004] However, the following defects still exist in this device and the prior art: 1. Since a servo hydraulic station often needs to supply oil to hydraulic cylinders on different devices, this will result in different types of oil pumps being required for different hydraulic cylinders. Some hydraulic cylinders do not require a high-precision oil pump for oil supply, while some do. However, the existing servo hydraulic stations often use a single oil pump for oil supply, so that when the servo hydraulic station is adapted to different devices for use, it cannot cooperate well with the devices.

[0005] 2. The existing control method of the servo hydraulic station often controls the oil pump through a host computer and a pressure controller, and requires manual control by personnel on site. With the progress of mechanical automation, how to monitor and control the servo hydraulic station without the presence of personnel remains to be solved. Therefore, the present application provides an intelligent servo hydraulic station system for remote monitoring and control to solve this problem. Summary of the Invention

[0006] The purpose of the present invention is to provide an intelligent servo hydraulic station system for remote monitoring and control to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: An intelligent servo hydraulic station system for remote monitoring and control, including an oil pump, the oil pump includes a servo hydraulic pump and a servo special oil pump, there are two solenoid valves, and the two solenoid valves are respectively installed by docking the liquid inlet ends of the servo hydraulic pump and the servo special oil pump through oil pipes. The liquid outlet ends of the servo hydraulic pump and the servo special oil pump are respectively equipped with pressure sensors for detecting the oil pressure. The signal transmitting end of the pressure sensor is electrically connected to the signal receiving end of the pressure controller, the control end of the pressure controller is electrically connected to the control receiving end of the solenoid valve, the communication module of the pressure controller is electrically connected to the Wi-Fi module, and the Wi-Fi module communicates with the remote monitoring module through the Internet.

[0008] Preferably, the remote monitoring module includes Blynk software and an ESP8266 module. The signal transceiver end of the ESP8266 module is communicatively connected to the Internet. The Blynk software includes monitoring software and a monitoring interface for the servo hydraulic station system column. The monitoring interface issues control commands through the interface virtual buttons and sends them to the Wi-Fi module through the ESP8266 module and the Internet. The Wi-Fi module sends the signal received from the remote monitoring module to the pressure controller, and the pressure controller drives the solenoid valve and the servo driver to act by receiving the control commands of the remote monitoring module.

[0009] Preferably, the pressure controller includes a controller module, a sensor module, an actuator module, a display module, a button, and a communication module. The signal receiving end of the sensor module is connected to the signal transmitting end of the pressure sensor, the sensor module is electrically connected to the signal receiving end of the controller module, the signal output end of the controller module is connected to the display module, the button is connected to the control input end of the controller module, the actuator module is connected to the control output end of the control module, the communication module is connected to the signal transceiver end of the controller module, and the Wi-Fi module is connected to the communication module.

[0010] Preferably, the control input ends of the servo driver are respectively electrically connected to the signal generator and the actuator module of the pressure controller. The servo driver includes a power supply circuit, a signal processing circuit, a driving circuit, and a communication interface. The power supply circuit provides power for each module circuit of the servo driver. The signal processing circuit includes an A / D converter, a digital processor, and a D / A converter, which are used to convert the electrical signals sent by the actuator module and the signal generator from analog signals to digital signals for processing, and convert the processed digital signals back to analog signals. The driving circuit is connected to the signal transmitting end of the signal processing circuit, and the signal output end of the driving circuit drives the servo motor of the servo hydraulic pump or the servo special oil pump to work.

[0011] Preferably, the communication interface is electrically connected to the RS485 communication module. The signal transceiver of the RS485 communication module is communicatively connected to the host computer. The RS485 communication module includes an asynchronous transceiver (UART) and an RS485 transceiver. The RS485 transceiver is electrically connected to the asynchronous transceiver (UART). The RS485 transceiver is docked with the communication interface of the servo driver. The data bus D0 to D7 of the asynchronous transceiver (UART) is electrically connected to the host computer.

[0012] Preferably, the signal generator includes control chips U3 and U4, amplifier IC1A, amplifier IC2A, amplifier IC1B, and amplifier IC2B. The Lout1 and Lout2 terminals of the control chip U3 are connected to the non-inverting and inverting input terminals of the amplifier IC1A. The output terminal of the amplifier IC1A is connected to one end of the resistor R58. The other end of the resistor R58 is connected to the inverting input terminal of the amplifier IC1B and one end of the resistor R55. The other end of the resistor R55 is connected to the output terminal of the amplifier IC1B.

[0013] Preferably, the Lout1 and Lout2 terminals of the control chip U4 are connected to the non-inverting and inverting input terminals of the amplifier IC2A. The output terminal of the amplifier IC2A is connected to one end of the resistor R56 and the Rfb terminal of the control chip U4. Both ends of the resistor R56 are connected to the inverting and output terminals of the amplifier IC2B.

[0014] Preferably, it further includes an oil tank for storing pressurized oil, a solenoid valve for controlling the oil volume and switch of the oil supply line, and an oil pump for oil supply. The outlet pipe of the oil tank is docked and installed with the liquid inlet end of the solenoid valve. The liquid outlet end of the solenoid valve is docked and installed with the liquid inlet end of the oil pump through an oil supply pipe. The liquid outlet end of the oil pump supplies oil to the hydraulic actuator.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this servo hydraulic station system, the oil pump is designed as two types of servo hydraulic pumps and a servo special oil pump. The servo hydraulic pump can be used in hydraulic systems that require precise control and high performance, such as machine tools, injection molding machines, and other equipment that require high-precision motion control. The servo special oil pump can be used in general hydraulic systems, such as construction machinery, etc. And the servo hydraulic pump usually has higher control accuracy and response speed, and can better meet the requirements of high-precision control. Therefore, different oil pumps can be selected according to the different hydraulic cylinders of the equipment driven by the servo hydraulic station.

[0016] 2. By connecting the communication module of the pressure controller in the servo hydraulic station system to the Internet through a Wi-Fi module, the remote monitoring module can receive the oil circuit pressure value sent by the pressure controller through the Blynk software on the mobile phone, so as to remotely monitor the operation of the oil circuit of the servo hydraulic station system. At the same time, control instructions can also be remotely sent to the pressure controller through the virtual buttons on the monitoring interface to drive the servo driver to start and stop the servo hydraulic pump and the servo special oil pump, achieving the purpose of controlling the operation of the servo hydraulic station system without unattended operation.

[0017] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be realized and obtained by the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the block diagram of the servo hydraulic station system of the present invention; Figure 2 is the block diagram of the remote monitoring module system of the present invention; Figure 3 is the block diagram of the pressure controller system of the present invention; Figure 4 is the circuit diagram of the servo driver of the present invention; Figure 5 is the circuit diagram of the RS485 communication module of the present invention; Figure 6 is the circuit diagram of the signal generator of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 6 , the embodiments provided by the present invention: Such as Figure 1As shown, an intelligent servo hydraulic station system for remote monitoring and control includes an oil tank for storing pressurized oil, a solenoid valve for controlling the oil volume and switch of the oil supply circuit, and an oil pump for supplying oil. The oil outlet pipe of the oil tank is connected to the liquid inlet end of the solenoid valve, and the liquid outlet end of the solenoid valve is connected to the liquid inlet end of the oil pump through the oil supply pipe. The liquid outlet end of the oil pump supplies oil to the hydraulic actuator. The oil pump includes a servo hydraulic pump and a servo-specific oil pump. Two solenoid valves are provided. The two solenoid valves are connected to the liquid inlet ends of the servo hydraulic pump and the servo-specific oil pump through oil pipes, respectively. The liquid outlet ends of the servo hydraulic pump and the servo-specific oil pump are respectively equipped with pressure sensors for detecting pressurized oil pressure. The signal transmitting end of the pressure sensor is electrically connected to the signal receiving end of the pressure controller, the control end of the pressure controller is electrically connected to the control receiving end of the solenoid valve, the communication module of the pressure controller is electrically connected to the Wi-Fi module, and the Wi-Fi module is communicatively connected to the remote monitoring module through the Internet.

[0021] like Figure 2 As shown, the remote monitoring module includes Blynk software and ESP8266 module. The signal transceiver end of the ESP8266 module is connected to the Internet communication. The Blynk software includes monitoring software and monitoring interface for the servo hydraulic station system column. The monitoring interface sends control instructions through virtual buttons on the interface, which are sent to the Wi-Fi module through the ESP8266 module and the Internet. The Wi-Fi module sends the signal received from the remote monitoring module to the pressure controller. The pressure controller drives the solenoid valve and the servo driver to act by receiving the control instruction of the remote monitoring module.

[0022] The following is a simple example that demonstrates how to use the ESP8266 module and Blynk software to achieve remote control of the hydraulic station system. In this example, we will connect to the ESP8266 module through the Internet and send instructions through a mobile phone application to control the start and stop of the hydraulic pump.

[0023] For example, the following steps: 1. Connect the ESP8266 module to the remote monitoring module.

[0024] 2. Write a program in the Arduino IDE, including the Wi-Fi connection and the code for controlling the servo hydraulic pump. Make sure the program can receive instructions from the Wi-Fi network and control the start and stop of the servo hydraulic pump accordingly.

[0025] #include<ESP8266WiFi.h> const char* ssid = "YourNetworkSSID"; const char* password = "YourNetworkPassword"; WiFiServer server(80); void setup() { Serial.begin(115200); delay(10); / / Connect to Wi-Fi WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println("Connected to Wi-Fi"); server.begin(); } void loop() { WiFiClient client = server.available(); if (!client) { return; } while (!client.available()) { delay(1); } String request = client.readStringUntil('\r'); client.flush(); if (request.indexOf(" / pump / on") != -1) { / / Control pump ON digitalWrite(2, HIGH); } else if (request.indexOf(" / pump / off") != -1) { / / Control pump OFF digitalWrite(2, LOW); } client.println("HTTP / 1.1 200 OK"); client.println("Content-Type: text / html"); client.println(); client.println("OK"); delay(1); client.stop(); } 3. Create a control button in the monitoring interface of the mobile Blynk software to send control instructions (such as / pump / on and / pump / off) to the ESP8266 module.

[0026] 4. Send instructions through the control button and observe the start and stop of the servo hydraulic pump.

[0027] Through the above steps, you can achieve remote control of the hydraulic station system.

[0028] As Figure 3 shown, the pressure controller includes a controller module, a sensor module, an actuator module, a display module, buttons, and a communication module. The signal receiving end of the sensor module is connected to the signal transmitting end of the pressure sensor. The sensor module is electrically connected to the signal receiving end of the controller module. The controller module is used to detect the pressure change in the system, convert these pressure signals into electrical signals, perform data processing and judgment based on the pressure signals collected by the sensor module, and then output a control signal. The signal output end of the controller module is connected to the display module to display the current pressure value or control status of the system, facilitating operation and monitoring by the operator. The buttons are connected to the control input end of the controller module and are used to manually input set values or control commands. These buttons are usually called "setting buttons" or "adjusting buttons". Users can press these buttons to set the working parameters of the pressure controller, such as setting the target pressure value, adjusting the control mode, etc. The actuator module is connected to the control output end of the control module and controls the actuator (servo drive) to adjust the oil pump in the system according to the signal output by the controller module. The communication module is connected to the signal transceiver end of the controller module, and the Wi-Fi module is connected to the communication module.

[0029] As Figure 4As shown, the control input terminals of the servo driver are electrically connected to the signal generator and the actuator module of the pressure controller respectively. The servo driver includes a power supply circuit, a signal processing circuit, a drive circuit, and a communication interface. The power supply circuit provides power for each module circuit of the servo driver. The power supply is stepped down and rectified through a transformer (possibly an isolation transformer) to supply the voltages required for different parts of the circuit. The signal processing circuit includes an A / D converter, a digital processor, and a D / A converter. This part contains several integrated circuits and processing units, which are used to convert the electrical signals sent by the actuator module and the signal generator from analog signals to digital signals for processing, and then convert the processed digital signals back to analog signals. The drive circuit is connected to the signal emission terminal of the signal processing circuit and is controlled by a PWM (pulse width modulation) signal. The signal output terminal of the drive circuit drives the servo motor of the servo hydraulic pump or the servo special oil pump to work.

[0030] As Figure 5 shown, the communication interface is electrically connected to the RS485 communication module. The signal transceiver terminals of the RS485 communication module are communicatively connected to the host computer. The RS485 communication module includes an asynchronous transceiver (UART) and an RS485 transceiver. The RS485 transceiver is electrically connected to the asynchronous transceiver (UART). The RS485 transceiver is docked with the communication interface of the servo driver. The data bus D0 to D7 of the asynchronous transceiver (UART) is electrically connected to the host computer.

[0031] As Figure 6 shown, the signal generator includes control chips U3 and U4, amplifiers IC1A, IC2A, IC1B, and IC2B. The Lout1 and Lout2 terminals of control chip U3 are connected to the non-inverting and inverting input terminals of amplifier IC1A. The output terminal of amplifier IC1A is connected to one end of resistor R58. The other end of resistor R58 is connected to the inverting input terminal of amplifier IC1B and one end of resistor R55. The other end of resistor R55 is connected to the output terminal of amplifier IC1B. The Lout1 and Lout2 terminals of control chip U4 are connected to the non-inverting and inverting input terminals of amplifier IC2A. The output terminal of amplifier IC2A is connected to one end of resistor R56 and the Rfb terminal of control chip U4. Both ends of resistor R56 are connected to the inverting and output terminals of amplifier IC2B.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent servo hydraulic station system for remote monitoring and control, including an oil pump, characterized in that: The oil pump includes a servo hydraulic pump and a special servo oil pump. There are two solenoid valves, and the two solenoid valves are respectively connected and installed to the liquid inlet ends of the servo hydraulic pump and the special servo oil pump through oil pipes. The liquid outlet ends of the servo hydraulic pump and the special servo oil pump are respectively equipped with pressure sensors for detecting the oil pressure. The signal transmitting end of the pressure sensor is electrically connected to the signal receiving end of the pressure controller. The control end of the pressure controller is electrically connected to the control receiving end of the solenoid valve. The communication module of the pressure controller is electrically connected to the Wi-Fi module. The Wi-Fi module communicates with the remote monitoring module through the Internet.

2. The intelligent servo hydraulic station system for remote monitoring and control according to claim 1, wherein: The remote monitoring module includes the Blynk software and the ESP8266 module. The signal transceiver end of the ESP8266 module is communicatively connected to the Internet. The Blynk software includes monitoring software and a monitoring interface for the servo hydraulic station system column. The monitoring interface issues control commands through the virtual interface buttons and sends them to the Wi-Fi module through the ESP8266 module and the Internet. The Wi-Fi module sends the signal received from the remote monitoring module to the pressure controller. The pressure controller drives the solenoid valve and the servo driver to act by receiving the control commands from the remote monitoring module.

3. The intelligent servo hydraulic station system for remote monitoring and control according to claim 2, wherein: The pressure controller includes a controller module, a sensor module, an actuator module, a display module, buttons, and a communication module. The signal receiving end of the sensor module is connected to the signal transmitting end of the pressure sensor. The sensor module is electrically connected to the signal receiving end of the controller module. The signal output end of the controller module is connected to the display module. The buttons are connected to the control input end of the controller module. The actuator module is connected to the control output end of the control module. The communication module is connected to the signal transceiver end of the controller module. The Wi-Fi module is connected to the communication module.

4. An intelligent servo hydraulic station system for remote monitoring and control according to claim 3, characterized in that: The control input ends of the servo drivers are respectively electrically connected to the signal generator and the actuator module of the pressure controller. The servo driver includes a power supply circuit, a signal processing circuit, a drive circuit, and a communication interface. The power supply circuit provides power for each module circuit of the servo driver. The signal processing circuit includes an A / D converter, a digital processor, and a D / A converter, which are used to convert the electrical signals sent by the actuator module and the signal generator from analog signals to digital signals for processing, and then convert the processed digital signals back to analog signals. The drive circuit is connected to the signal transmitting end of the signal processing circuit. The signal output end of the drive circuit drives the servo motor of the servo hydraulic pump or the special servo oil pump to work.

5. The intelligent servo hydraulic station system for remote monitoring and control according to claim 4, wherein: The communication interface is electrically connected to the RS485 communication module. The signal transceiver of the RS485 communication module is communicatively connected to the host computer. The RS485 communication module includes an asynchronous transceiver (UART) and an RS485 transceiver. The RS485 transceiver is electrically connected to the asynchronous transceiver (UART). The RS485 transceiver is docked with the communication interface of the servo driver. The data bus D0 to D7 of the asynchronous transceiver (UART) is electrically connected to the host computer.

6. The intelligent servo hydraulic station system for remote monitoring and control according to claim 5, characterized in that: The signal generator includes control chips U3 and U4, amplifiers IC1A, IC2A, IC1B, and IC2B. The Lout1 terminal and the Lout2 terminal of the control chip U3 are connected to the non-inverting and inverting input terminals of the amplifier IC1A. The output terminal of the amplifier IC1A is connected to one end of the resistor R58. The other end of the resistor R58 is connected to the inverting input terminal of the amplifier IC1B and one end of the resistor R55. The other end of the resistor R55 is connected to the output terminal of the amplifier IC1B.

7. An intelligent servo hydraulic station system for remote monitoring and control according to claim 6, characterized in that: The Lout1 terminal and the Lout2 terminal of the control chip U4 are connected to the non-inverting and inverting input terminals of the amplifier IC2A. The output terminal of the amplifier IC2A is connected to one end of the resistor R56 and the Rfb terminal of the control chip U4. Both ends of the resistor R56 are connected to the inverting and output terminals of the amplifier IC2B.

8. An intelligent servo hydraulic station system for remote monitoring and control according to claim 1, characterized in that: It also includes an oil tank for storing pressurized oil, a solenoid valve for controlling the oil volume and switch of the oil supply line, and an oil pump for oil supply. The outlet pipe of the oil tank is docked and installed with the liquid inlet end of the solenoid valve. The liquid outlet end of the solenoid valve is docked and installed with the liquid inlet end of the oil pump through an oil supply pipe. The liquid outlet end of the oil pump supplies oil to the hydraulic actuator.

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