CN204065791U - Based on the air lock automatic control system of wireless sensor network - Google Patents

Abstract

The utility model relates to an automatic gate control system based on a wireless sensor network, comprising a plurality of wireless sensor nodes arranged near the gate, wireless communication between the wireless sensor nodes and the control instrument of the hoist, and the input and output of the control instrument of the hoist The terminal is connected with the input and output terminals of the main control computer. The utility model has a simple structure and is easy to install. Due to the arrangement of multiple wireless sensor nodes, the system can not only detect the changes in the opening of the gate and the load, but also monitor the changes in the water level, flow velocity and water temperature near the gate at the same time, so that the control system can be based on more More hydrological information is used to schedule and control the gate, which enhances the scientificity and reliability of the control; and compared with the traditional wired method, the wireless transmission method simplifies the difficulty of on-site wiring and avoids the interruption of data communication due to aging or damage of signal lines. Maintenance is more convenient.

Description

Gate Automatic Control System Based on Wireless Sensor Network

technical field

The utility model relates to the technical field of automatic control of water conservancy gates, in particular to an automatic control system for gates based on a wireless sensor network.

Background technique

At present, the existing gate automatic control system in China can only detect the opening value of the gate and the load weight during the lifting process of the gate, and the sensor and the gate control instrument are connected by wired cables. Therefore, This type of gate control system has the following defects: First, it cannot detect important hydrological information such as water level, flow velocity, and water temperature. When the water level and flow velocity change greatly during the flood season and ice slush occurs when the water temperature is low in winter, it cannot automatically adjust the gate according to the change of hydrological information. The real-time adjustment of the operating status of the gate has potential safety hazards; second, the exposed sensor cable is easily damaged during the operation of the gate, and will be interfered by the large signal in the power cable, causing the control instrument to receive a wrong signal and malfunction, affecting normal operation of the gate.

Utility model content

The purpose of the utility model is to provide an automatic gate control system based on a wireless sensor network that can detect important hydrological information near the gate through wireless sensor nodes, and enhance the scientificity, reliability and stability of the gate control process.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a gate automatic control system based on a wireless sensor network, including a plurality of wireless sensor nodes arranged near the gate, wireless sensor nodes and hoist control instruments Communication, the input and output terminals of the gate hoist control instrument are connected with the input and output terminals of the main control computer.

The number of wireless sensor nodes is 8; the wireless sensor nodes and the hoist control instrument form a star wireless network; the hoist control instrument is connected to the main control computer through a serial bus.

The wireless sensor node includes a sensor for collecting hydrological information, the output end of the sensor is connected with the input end of the signal conditioning module, the output end of the signal conditioning module is connected with the input end of the AD conversion module, and the output end of the AD conversion module is connected with the signal conditioning module. The input terminals of the processing module are connected, and the output terminals of the signal processing module are respectively connected with the input terminals of the display module and the wireless communication module.

The hoist control instrument is connected with the main control computer through the RS232 communication module.

The sensor is any one of a water level sensor, a flow rate sensor, a temperature sensor, a load sensor and an opening sensor.

Described signal processing module comprises STC11F32XE single-chip microcomputer, and described AD conversion module adopts CS5550 chip, and its 15,16 pins are connected with the output end of signal conditioning module, and its 19,23,7,6,5 pins are connected with STC11F32XE single-chip microcomputer respectively. P3.3, P1.7, P3.2, P1.5, P1.6 pins are connected, its 1st pin is connected to its 24th pin through the crystal oscillator Y1, its 13th pin is grounded, its 11th, 12th pins are connected in parallel and grounded through the capacitor C53 , its 14 pins are respectively connected to one end of the resistor R48 and the capacitor C55, the other end of the resistor R48 is connected to +5V direct current, and the other end of the capacitor C55 is grounded.

Described display module comprises drive circuit and nixie tube, and described drive circuit adopts driver chip TM1620, and its 2,3,4,5,6,7,8,9 pins are connected with A, B, C, D of nixie tube respectively , E, F, G, and DP pins are connected, and its 17, 16, 14, and 13 pins are respectively connected to the bit selection pins D1, D2, D3, and D4 of the digital tube, and its 20, 19, and 18 pins are respectively connected to The P1.2, P1.3, and P1.4 pins of the STC11F32XE microcontroller are connected.

Described wireless communication module comprises wireless communication chip IC1, and wireless communication chip IC1 adopts RN630 chip, and its 1 pin is grounded, and ceramic capacitor C3 is connected between its 1,2 pins, and its 3,4 pins are connected with P3.0, P3 of STC11F32XE single-chip microcomputer respectively. The .1 pins are connected, and the 6, 7, and 9 pins are suspended.

It can be seen from the above technical solution that the utility model has a simple structure and is easy to install. Due to the arrangement of multiple wireless sensor nodes, the system can not only detect the changes in the opening of the gate and the load, but also monitor the changes in the water level, flow velocity and water temperature near the gate at the same time. It enables the control system to schedule and control the gates based on more hydrological information, which enhances the scientificity and reliability of the control; and compared with the traditional wired method, the wireless transmission method simplifies the difficulty of on-site wiring and avoids the aging of signal lines due to data communication. Or damaged and interrupted, routine maintenance is more convenient.

Description of drawings

Fig. 1 is a network topology diagram of the utility model.

FIG. 2 is a circuit block diagram of the wireless sensor node in FIG. 1 .

Figures 3, 4, 5, and 6 are schematic circuit diagrams of the AD conversion module, the digital tube of the display module, the drive circuit of the display module, and the wireless communication module in Fig. 2, respectively.

Fig. 7 is a monitoring interface diagram of the utility model.

Detailed ways

An automatic gate control system based on a wireless sensor network, including a plurality of wireless sensor nodes 1 arranged near the gate, wireless communication between the wireless sensor nodes 1 and the hoist control instrument 2, and the input and output of the hoist control instrument 2 The end is connected with the input and output ends of the main control computer 4. The input and output terminals of the hoist control instrument 2 are connected with the input and output terminals of the main control computer 4 through a serial bus 3 , as shown in FIG. 1 . The number of the wireless sensor nodes 1 is 8; the wireless sensor nodes 1 and the hoist control instrument 2 form a star wireless network; the hoist control instrument 2 communicates with the main control computer through the serial bus 3 4 connected. The wireless network constructed by this system during work is a star network topology, the hoist control instrument 2 is the central node of the wireless network, other wireless sensor nodes 1 communicate with the hoist control instrument 2 and upload the collected data, and the hoist control instrument 2 is used as the central node of the wireless network. The computer control instrument 2 carries out preliminary analysis and processing to the data, and then transmits part of the data to the main control computer 4 in the main control room.

As shown in Figure 2, the wireless sensor node 1 includes a sensor for collecting hydrological information, the output end of the sensor is connected to the input end of the signal conditioning module, and the output end of the signal conditioning module is connected to the input end of the AD conversion module 5, The output end of the AD conversion module 5 is connected to the input end of the signal processing module 6 , and the output end of the signal processing module 6 is respectively connected to the input ends of the display module 7 and the wireless communication module 8 . The sensor is any one of a water level sensor, a flow rate sensor, a temperature sensor, a load sensor and an opening sensor. The sensor converts the detected physical quantity into an electrical signal, then sends it to the signal conditioning module for filtering and amplification, and then performs AD conversion through the AD conversion module 5, and the converted digital signal is analyzed and processed by the signal processing module 6, and packaged into a specific format data frame, the data frame is sent to the hoist control instrument 2 at the central node of the wireless network at regular intervals, the interval time for sending data can be set, if the interval time is long, the corresponding battery life will be long, otherwise the battery The service life is short.

As shown in Figure 3, described signal processing module 6 comprises STC11F32XE single-chip microcomputer, and described AD conversion module 5 adopts CS5550 chip, and its 15,16 pins are connected with the output end of signal conditioning module, and its 19,23,7,6, The 5 pins are respectively connected to the P3.3, P1.7, P3.2, P1.5, P1.6 pins of the STC11F32XE microcontroller, the 1 pin is connected to the 24 pin through the crystal oscillator Y1, the 13 pin is grounded, and the 11, After the 12 pins are connected in parallel, they are grounded through the capacitor C53, and the 14 pins are respectively connected to one end of the resistor R48 and the capacitor C55, the other end of the resistor R48 is connected to +5V DC, and the other end of the capacitor C55 is grounded. In order to ensure the detection accuracy, the system uses a 24-bit high-precision AD converter CS5550 chip. The reference voltage for AD conversion uses the 2.5V reference voltage inside the chip. Therefore, connect the VFOUT pin of the CS5550 chip to the VFIN pin, and pass The ceramic capacitor C53 is grounded to reduce the interference of the noise signal to the reference voltage. The output signal of the sensor is a mV-level differential voltage signal, which is input from the AIN1+ and AIN1- pins of the CS5550 chip. The power required for the CS5550 chip to work is provided by the 5V analog power supply and the 5V digital power supply in the system. The 5V analog power supply is connected to the VA+ pin, and the 5V digital power supply is connected to the VDD pin. The chip select pin of CS5550 chip is The pin is connected to the P3.2 pin of the STC11F32XE single-chip microcomputer. When the pin of the STC11F32XE single-chip microcomputer outputs a low level, the CS5550 chip works normally, otherwise it is in a prohibited state. The /RST pin is connected to the P3.3 pin of the STC11F32XE microcontroller. When the output is low, the CS5550 chip is reset. Its SDO, SCLK and SDI are the three-wire serial communication ports of the CS5550 chip, which are respectively connected to P1.5 and P1 of the STC11F32XE microcontroller. .6 and P1.7 pins, the SDI pin is the input port for data transmission, the SDO pin is used to mark whether the AD conversion is completed, and the SCLK pin is the clock pulse input port. Since there is no oscillator inside the CS5550 chip, an external 4.096MHz crystal oscillator circuit needs to be connected to the XIN and XOUT pins when working.

As shown in Figures 4 and 5, the display module 7 includes a driving circuit and a digital tube, and the driving circuit adopts a driving chip TM1620, and its pins 2, 3, 4, 5, 6, 7, 8, and 9 are connected to the digital tubes respectively. The pins A, B, C, D, E, F, G, and DP of the tube are connected, and the pins 17, 16, 14, and 13 are respectively connected to the position selection pins D1, D2, D3, and D4 of the digital tube. Pins 20, 19, and 18 are respectively connected to the P1.2, P1.3, and P1.4 pins of the STC11F32XE microcontroller. The driver chip of the high-brightness digital tube is TM1620, and the display data is input through the STB, CLK and DIN three-wire serial communication ports, respectively connected to the P1.2, P1.3 and P1.4 pins of the STC11F32XE single-chip microcomputer, where STB is the lock Storage signal input port, CLK is the synchronous clock signal input port, DIN is the data input port.

As shown in Fig. 6, described wireless communication module 8 comprises wireless communication chip IC1, and wireless communication chip IC1 adopts RN630 chip, and its 1 pin is grounded, and ceramic capacitor C3 is connected between its 1, 2 pins, and its 3, 4 pins are connected with STC11F32XE respectively. The P3.0 and P3.1 pins of the microcontroller are connected, and the 6, 7, and 9 pins are suspended. There are 9 lead-out wires of the interface of the wireless communication module 8, of which the lead-out line No. 1 is grounded, and the lead-out line No. 2 is connected to the power supply. In order to reduce the interference of radio frequency signals to other circuits in the system, a Ceramic capacitor C3, which can effectively isolate part of the radio frequency noise. The No. 3 and No. 4 lead-out lines are the RS232 interface for communication with the STC11F32XE MCU. The No. 3 lead-out line is the RXD signal line, which is connected to the multiplexing pin P3.0 of the STC11F32XE MCU. The No. 4 lead-out line is the TXD signal line, which is connected to the STC11F32XE MCU. The multiplexing pin P3.1 of the above two signal lines can communicate with the STC11F32XE microcontroller through the RS232 interface after the above two signal lines are connected. The data that the STC11F32XE microcontroller needs to send out is first passed to the wireless communication module 8 through the RS232 interface, and then sent to other wireless nodes by the wireless communication module 8; the data received by the wireless communication module 8 can also be transmitted to the STC11F32XE microcontroller through the RS232 interface for processing . The No. 8 lead-out line of the wireless communication module is the dormancy signal input terminal. Since the module in this system has been transmitting signals and does not need to be dormant, the lead-out line is not connected to the STC11F32XE single-chip microcomputer, and it can be connected to a fixed level. 6. Lead wires 7 and 9 are empty leads, which should be suspended in the circuit.

As shown in Figure 7, it can be seen intuitively from the figure that the current opening value of each gate, the load value on the left and right sides, the upstream and downstream water level, the flow velocity and the water temperature value and other information, when a certain index exceeds the preset threshold value , the monitoring interface will start an audible and visual alarm to prompt the operator to deal with it. There are three types of gate control: automatic control, manual control and remote control. Manual control can be used when maintaining and inspecting the gate; automatic control or remote control can be used for daily operation of the gate.

Set up multiple wireless sensor nodes 1 near the gate. The number of wireless sensor nodes 1 and the types of sensors in the nodes can be flexibly set according to actual needs. Generally, 2 water level sensor wireless nodes, 2 flow rate sensor wireless nodes, 1 temperature sensor wireless node, 2 load sensor nodes and 1 opening sensor node. Each wireless sensor node 1 and the corresponding hoist control instrument 2 form a star-shaped wireless network and exchange data. The hoist control instrument 2 is installed in the electric control cabinet next to the corresponding hoist, and each hoist control instrument 2 passes through The serial bus 3 is connected with the main control computer 4 in the control machine room, and the main control computer 4 performs real-time regulation on the operation status of each hole gate.

The working principle of the utility model is as follows: each wireless sensor node 1 distributed around the gate and the corresponding hoist control instrument 2 form a star-shaped wireless network, and each wireless sensor node 1 collects the upstream and downstream water level, flow velocity, water temperature, and gate load in real time important hydrological information, such as water volume, gate opening value, etc., and convert these information into specific digital signal frames after being processed by the signal processing module 6, and these signal frames will be sent to the wireless network through the wireless communication module 8 at regular intervals. The hoist control instrument 2 at the central node of the network receives and analyzes these data frames, and if some important parameters are found to exceed the preset threshold, the power supply of the hoist is immediately cut off to stop its operation, and an audible and visual alarm message is issued at the same time Alert the operator. The hoist control instrument 2 will periodically poll all nodes in the wireless network. When a certain wireless sensor node 1 is damaged for some reason or fails or the power is insufficient, the hoist control instrument 2 can detect it in time and accurately locate it, which is convenient for operation personnel to repair or replace the battery as soon as possible.

The hoist control instrument 2 will also send the hydrological information at the gate of the hole through the serial bus 3 to the main control computer 4 in the control room after preliminary processing. Data, real-time information such as water level, flow velocity, water temperature, gate load and gate opening value at each gate are displayed in the interface. If the main control computer 4 finds that some hydrological indicators at a certain gate exceed the normal range, it will immediately send The sound and light alarm signal warns the operator, and at the same time sends a warning command to the hoist control instrument 2 at the corresponding gate through the serial bus 3. After the hoist control instrument 2 receives the warning command from the main control computer 4, it will immediately Cut off the power supply of the hoist and send a warning message to remind the operator; if all the hydrological indicators are within the normal range, the main control computer 4 will send various operation instructions to the control instruments 2 of the hoist, scientific and reasonable scheduling The gates of each hole are operating normally.

To sum up, the utility model has a simple structure and is easy to install. Since a plurality of wireless sensor nodes 1 are set, the system can not only detect changes in gate opening and load, but also monitor changes in water level, flow velocity and water temperature near the gate at the same time. It enables the control system to schedule and control the gates based on more hydrological information, which enhances the scientificity and reliability of the control; and compared with the traditional wired method, the wireless transmission method simplifies the difficulty of on-site wiring and avoids the aging of signal lines due to data communication. Or damaged and interrupted, routine maintenance is more convenient.

Claims (8)

1. An automatic gate control system based on a wireless sensor network, characterized in that: it includes a plurality of wireless sensor nodes (1) arranged near the gate, between the wireless sensor nodes (1) and the hoist control instrument (2) For wireless communication, the input and output terminals of the hoist control instrument (2) are connected with the input and output terminals of the main control computer (4). 2. The gate automatic control system based on wireless sensor network according to claim 1, characterized in that: the number of the wireless sensor nodes (1) is 8; The hoist control instrument (2) forms a star-shaped wireless network; the hoist control instrument (2) is connected to the main control computer (4) through a serial bus (3). 3. The gate automatic control system based on wireless sensor network according to claim 1, characterized in that: the wireless sensor node (1) includes a sensor for collecting hydrological information, the output terminal of the sensor and the input of the signal conditioning module The output terminal of the signal conditioning module is connected to the input terminal of the AD conversion module (5), the output terminal of the AD conversion module (5) is connected to the input terminal of the signal processing module (6), and the output terminal of the signal processing module (6) The terminals are respectively connected with the input terminals of the display module (7) and the wireless communication module (8). 4. The gate automatic control system based on wireless sensor network according to claim 2, characterized in that: the hoist control instrument (2) is connected to the main control computer (4) through the RS232 communication module. 5. The gate automatic control system based on wireless sensor network according to claim 3, characterized in that: said sensor is any one of water level sensor, flow rate sensor, temperature sensor, load sensor and opening sensor. 6. The gate automatic control system based on wireless sensor network according to claim 3, characterized in that: said signal processing module (6) includes STC11F32XE single-chip microcomputer, said AD conversion module (5) adopts CS5550 chip, its 15, Pin 16 is connected to the output terminal of the signal conditioning module, and pins 19, 23, 7, 6, and 5 are respectively connected to pins P3.3, P1.7, P3.2, P1.5, and P1.6 of the STC11F32XE microcontroller Its 1 pin is connected to its 24 pin through the crystal oscillator Y1, its 13 pin is grounded, its 11 and 12 pins are connected in parallel and grounded through the capacitor C53, and its 14 pin is connected to one end of the resistor R48 and capacitor C55 respectively, and the other end of the resistor R48 Connect to +5V DC, and the other end of capacitor C55 is grounded. 7. The gate automatic control system based on wireless sensor network according to claim 3, characterized in that: the display module (7) includes a driving circuit and a digital tube, and the driving circuit adopts a driving chip TM1620, and its 2, 3 , 4, 5, 6, 7, 8, 9 pins are respectively connected to A, B, C, D, E, F, G, DP pins of the digital tube, and its 17, 16, 14, 13 pins are respectively connected to The position selection pins D1, D2, D3, and D4 of the digital tube are connected, and its pins 20, 19, and 18 are respectively connected to the P1.2, P1.3, and P1.4 pins of the STC11F32XE microcontroller. 8. The gate automatic control system based on wireless sensor network according to claim 3, characterized in that: the wireless communication module (8) includes a wireless communication chip IC1, the wireless communication chip IC1 adopts RN630 chip, and its 1 pin is grounded, The ceramic capacitor C3 is connected between pins 1 and 2, pins 3 and 4 are respectively connected to pins P3.0 and P3.1 of the STC11F32XE microcontroller, and pins 6, 7, and 9 are suspended.