CN108123732B - Remote multifunctional wireless sensor node - Google Patents

Abstract

The invention discloses a remote multifunctional wireless sensor node and a system, comprising: the antenna comprises a main control module, an antenna module, a communication module, a collected signal input module and a power supply module, wherein the main control module is respectively connected with the antenna module and the communication module in a bidirectional mode, and the output end of the collected signal input module is electrically connected with the power supply end of the main control module; the wireless sensor node further comprises: a range expansion module, the communication module comprising: the WIFI circuit, the USB circuit and the RS-232 serial port circuit; the main control module is bidirectionally connected with the antenna module through the range expansion module, and a matched filtering unit is arranged between the range expansion module and the main control module; the invention has long transmission distance and flexible transmission mode, and is suitable for the field of wireless sensor networks.

Description

Remote multifunctional wireless sensor node

Technical Field

The invention belongs to the technical field of wireless sensor networks, and particularly relates to a remote multifunctional wireless sensor node and a remote multifunctional wireless sensor system.

Background

The Wireless Sensor Network (Wireless Sensor Network) technology is a system technology which is composed of a group of Wireless Sensor nodes, and the sensors mutually sense, acquire and process information acquired by the sensors in the coverage area of the Wireless Network and transmit the related information to a terminal. The wireless sensor network is a new field of information technology development, integrates data acquisition, transmission and fusion analysis, and has a very wide application prospect in various fields such as environmental monitoring, earthquake monitoring, medical monitoring, urban traffic management, military reconnaissance and the like. In a wireless sensor network system, a node is a basic constituent element of a network, and has a sensor signal acquisition function, a signal processing function, and a wireless communication function. In the network data transmission process, the node is not only the sender of the system information packet, but also the forwarder of the system information packet. The nodes carry out self-organization and multi-hop routing through the network and send data to the gateway. The node may contact the external network through a variety of communication means, such as: satellite, mobile communication network, Internet, etc.

The research of wireless sensor networks began in the last 90 th century. The key technology of the research of the advanced research program bureau of the united states department of defense is the sensor node technology, in a sensor group, only relatively simple point-to-point communication is carried out between different sensor nodes, and the technology enters the 21 st century, and with the progress of wireless communication technology, microchip manufacturing and other technologies, the research of the wireless sensor network technology is greatly advanced, and great attention is paid to the military, academic and industrial fields. The related research and application in China are also vigorous development. In 2001, the Chinese academy established a microsystem research center dedicated to the study of sensor networks.

In recent years, a plurality of wireless sensor network node design methods are developed at home and abroad, and the on-line data acquisition and monitoring system of large-scale electrical equipment based on a wireless sensor network is developed and developed by Yang Yongming and Chen school of Chongqing university. The hardware node and base station are proposed to use the hardware design of tinyos2.1 system developed by berkeley division of university of california, PCB antenna, operating system using the processing core of the system-on-chip of CC 2431. The data collected by the sensor can reflect the temperature information of the transformer in real time, and the computer management system can directly reflect the condition of a data collection object, so that the data can be stored in real time and online monitoring data can be provided. The node design in the detection method has the defects of limited communication capacity, short communication distance between nodes and more nodes needing to be arranged in the system.

A novel wireless sensor network system applied to water environment data monitoring is developed by Luyunfeng, Jinning and the like of China metrological college, and the system consists of three parts: the system comprises sensor nodes, sink nodes and a data monitoring center. The sensor nodes may carry multi-parameter data acquisition modules such as pH, Dissolved Oxygen (DO), conductivity, and temperature. The node of the receiver and the remote monitoring center carry out data communication through RS232 or 3G/GPRS. The system can be effectively applied to some distributed automatic water environment monitoring such as aquaculture, lake and river water. Compared with the traditional water quality monitoring system, the system has the following advantages: the sensor node has low cost, low power consumption, flexible monitoring parameters, self-organization of the sensor network in the monitoring area, large network capacity, dense node distribution and accurate data acquisition. The node design in the detection method has the defects of single power supply mode and single communication mode.

People such as Liu Xiaoyang developed the coal mine tunnel monitoring system who mixes zigBee and wiFi technique among the wireless communication system in the great billow of China mining science and technology university, developed a multi-functional wireless communication system, adopted zigBee and wiFi technique to combine together, can realize gas monitoring, wireless communication, personnel's management and video monitoring, function etc.. The requirement of dispatching communication can be met, and the coal mine tunnel can be safely monitored. The system consists of two parts: the underground monitoring part and the surface monitoring part. The underground part consists of a Base Station (BS), a wireless sensor, a dual-mode mobile phone, an identity card (ID card), a video camera and the like, and all the devices have to be safe and explosion-proof. The ground monitoring part is mainly a device arranged in a monitoring room and comprises a control console and a server. The node design in the detection method has the defects of high energy consumption, fussy maintenance and low sampling rate.

As an emerging technology with a wide application range and a huge development prospect, the wireless sensor network has entered a practical application stage. At present, the wireless sensor network technology mainly focuses on the sensor detection technology, the data acquisition technology and the data processing technology in the application scene. Through the current research situation analysis of wireless sensor network nodes at home and abroad, most of the current node designs are based on common environment monitoring, the wireless sensor network nodes have a multi-channel signal acquisition function, the requirement on the sampling rate of signals is low, generally does not exceed 15Ksps, and the testing requirement of transient field signals can not be met far, so that the testing nodes are required to have large instantaneous sampling data volume and good real-time performance, and in addition, the wireless sensor network nodes also need technical indexes such as long transmission distance, high positioning precision, flexible transmission mode, multiple power supply modes and the like. The network coverage is one of basic performance indexes when a wireless sensor network is constructed, namely how to arrange sensor nodes can maximize the network coverage under the condition of ensuring certain service quality. In order to ensure the effectiveness of monitoring of the wireless sensor network, any point in a monitoring area is generally required to be within the detection range of at least one node. Due to the application of the multi-hop technology in the wireless sensor network, the network coverage is not limited to the communication distance of a single node, and can be infinitely expanded in theory. However, the sensor nodes adopt the multi-hop technology, redundant data can be generated, so that the intermediate forwarding nodes generate extra energy consumption, and the service life of the network is shortened.

Disclosure of Invention

The invention overcomes the defects of the prior art, and solves the technical problems that: the remote multifunctional wireless sensor node and the system have the advantages of long transmission distance and flexible transmission mode.

In order to solve the technical problems, the invention adopts the technical scheme that: a remote multifunctional wireless sensor node, comprising: the wireless sensor node comprises a main control module, an antenna module, a communication module, a collected signal input module and a power supply module, wherein the main control module is respectively connected with the antenna module and the communication module in a bidirectional mode, the output end of the collected signal input module is electrically connected with the input end of the main control module, and the power supply module supplies power to the whole wireless sensor node; the wireless sensor node further comprises: a range expansion module, the communication module comprising: the WIFI circuit, the USB circuit and the RS-232 serial port circuit; the main control module is connected with the antenna module in a bidirectional mode through the range expansion module, and a matched filtering unit is arranged between the range expansion module and the main control module.

Preferably, the power supply module includes: the output end of the storage battery unit and the output end of the direct current power supply unit are respectively and electrically connected with the input end of the energy management unit, and the output end of the energy management unit is the output end of the power supply module.

Preferably, the main control module includes: the main control chip CC2538, the extension module of said range includes: radio frequency front end chip CC2592, the matched filter unit includes: inductance L1, resistance R1, resistance R2 and resistance R3, the antenna module includes: an antenna interface M1 and an antenna interface M2; the inductor L1 is respectively connected in parallel between a video signal input/output terminal RF _ P and a video signal input/output terminal RF _ N of the main control chip CC2538, and between a video signal input/output terminal RF _ P and a video signal input/output terminal RF _ N of the radio frequency front-end chip CC2592, the digital control terminal PA _ EN of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PC3 of the main control chip CC2538 through a resistor R1, the digital control terminal LNA _ EN of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PC2 of the main control chip CC2538 through a resistor R2, and the digital control terminal HGM of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PD2 of the main control chip CC2538 through a resistor R3; power supply terminals VDD _ PA, VDD _ LNA and VDD _ BLAS of the radio frequency front-end chip CC2592 are all connected to an output terminal VCC of the power supply module, and the output terminal VCC of the power supply module is grounded through a capacitor C1, a capacitor C2 and a capacitor C3 respectively; an antenna connection end ANT of the radio frequency front-end chip CC2592 is connected with an antenna interface M2 sequentially through an inductor L2, an inductor L4 and a capacitor C8, a connection line between the inductor L4 and the capacitor C8 is connected with the antenna interface M1 through a capacitor C7, an inductor L3 is connected between the antenna connection end ANT of the radio frequency front-end chip CC2592 and an output end VCC of the power module in series, the antenna connection end ANT of the radio frequency front-end chip CC2592 is further grounded through a capacitor C4, a connection line between the inductor L2 and the inductor L4 is grounded through a capacitor C5, a connection line between the inductor L4 and the capacitor C8 is grounded through a capacitor C6, and a connection line between the capacitor C8 and the antenna interface M2 is grounded through a capacitor C9; the input BIAS terminal BIAS of the rf front-end chip CC2592 is grounded through a resistor R4, and the ground terminals GND and EGP/GND of the rf front-end chip CC2592 are grounded.

Preferably, the WIFI circuit comprises: WIFI interface P _ WIFI, the USB circuit includes: USB interface P _ USB, the RS-232 serial port circuit includes: RS-232 transceiver U1 and serial port interface DB 9; a power supply terminal VCC of the WIFI interface P _ WIFI is connected with an output terminal VCC of the power supply module, a ground terminal GND of the WIFI interface P _ WIFI is grounded, a serial port sending terminal TXD of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PA0 of the main control chip CC2538, a serial port sending terminal RXD of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PA1 of the main control chip CC2538, a reset terminal RST of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PB2 of the main control chip CC2538, and a mode selection terminal IO _0 of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PB3 of the main control chip CC 2538; the data transmission positive terminal D + of the USB interface P _ USB is connected with the USB signal transmission positive terminal USB _ P of the main control chip CC2538 through a resistor R13, the data transmission negative terminal D-of the USB interface P _ USB is connected with the USB signal transmission negative terminal USB _ N of the main control chip CC2538 through a resistor R14, the USB signal transmission positive terminal USB _ P of the main control chip CC2538 is grounded through a capacitor C19, the USB signal transmission positive and negative terminals USB _ N of the main control chip CC2538 are grounded through a capacitor C20, and the data transmission positive terminal D + of the USB interface P _ USB is also connected with the digital signal input/output terminal PC0 of the main control chip CC2538 through a resistor R12; a power supply terminal VCC of the RS-232 transceiver U1 is connected with an output terminal VCC of the power supply module 105, a charge pump positive voltage generation terminal V + of the RS-232 transceiver U1 is connected with the power supply terminal VCC of the RS-232 transceiver U1 through a capacitor C23, a charge pump negative voltage generation terminal V-of the RS-232 transceiver U1 is grounded through a capacitor C24, and a ground terminal GND of the RS-232 transceiver U1 is grounded; a capacitor C21 is connected in series between a voltage-multiplying charge pump capacitor positive end C1+ and a voltage-multiplying charge pump capacitor negative end C1-of the RS-232 transceiver U1, and a capacitor C22 is connected in series between an inverting charge pump capacitor positive end C2+ and a voltage-multiplying charge pump capacitor negative end C2-of the RS-232 transceiver U1; the input end of a TTL/CMOS transmitter of the RS-232 transceiver U1 is connected with the cathode of a diode D4, the output end of a TTL/CMOS receiver of the RS-232 transceiver U1 is connected with the cathode of a diode D3, the input end of an RS-232 receiver of the RS-232 transceiver U1 is connected with the serial port interface DB9, the output end of an RS-232 transmitter of the RS-232 transceiver U1 is connected with the serial port interface DB9, and the ground end GND of the serial port interface DB9 is grounded; the anode of the diode D4 is connected to the output terminal VCC of the power module through a pull-up resistor R17, the anode of the diode D4 is further connected to the digital signal input/output terminal PC6 of the main control chip CC2538, the anode of the diode D3 is connected to the output terminal VCC of the power module through a pull-up resistor R16, and the anode of the diode D3 is further connected to the digital signal input/output terminal PC7 of the main control chip CC 2538.

Preferably, the USB circuit further comprises: an input end IN of the voltage conversion chip U2 is connected to a power end VCC of the USB interface P _ USB, an input end IN of the voltage conversion chip U2 is further grounded through a capacitor C17, an output end OUT of the voltage conversion chip U2 is connected to a USB power supply end DVDD _ USB of the main control chip CC2538, an output end OUT of the voltage conversion chip U2 is further grounded through a capacitor C18, and a ground end GND of the voltage conversion chip U2 is grounded.

Preferably, the energy management unit comprises: a power controller U3 and a voltage conversion chip U4; a main Power supply input end Vin of the Power controller U3 is connected with an output end Power1 of the direct-current Power supply unit, an output end Power1 of the direct-current Power supply unit is grounded through a capacitor C31, an output end Power1 of the direct-current Power supply unit is also connected with a drain of a PMOS transistor Q3, a source of the PMOS transistor Q3 is connected with a source of a PMOS transistor Q4, a drain of the PMOS transistor Q4 is connected with a drain of a PMOS transistor Q2, a source of the PMOS transistor Q2 is connected with a source of a PMOS transistor Q1, a source of the PMOS transistor Q1 is connected with an output end Power2 of the storage battery unit, and an output end Power2 of the direct-current Power supply unit is grounded through a capacitor C30; the GATE of the PMOS transistor Q3 and the GATE of the PMOS transistor Q4 are both connected to the GATE driving terminal GATE of the power controller U3, the GATE of the PMOS transistor Q1 and the GATE of the PMOS transistor Q2 are both connected to the status signal output terminal STAT of the power controller U3 through a resistor R18, and the logic level control signal input terminal CTL of the power controller U3 is connected to the digital signal input/output terminal PD5 of the main control chip CC 2538; the drain of the PMOS transistor Q2 is further connected to the auxiliary power input SENSE of the power controller U3, and the drain of the PMOS transistor Q2 and the drain of the PMOS transistor Q4 are both grounded through a capacitor C29; the drain electrode of PMOS transistor Q2 the drain electrode of PMOS transistor Q4 all with voltage conversion chip U4's INPUT INPUT links to each other, voltage conversion chip U4's INPUT INPUT is through electric capacity C25, electric capacity C26 ground connection respectively, voltage conversion chip U4's earthing terminal ADJ/GND ground connection, voltage conversion chip U4's OUTPUT OUTPUT, TAB do power module's OUTPUT VCC, power module's OUTPUT VCC is through electric capacity C27, electric capacity C28 ground connection respectively.

Preferably, the collected signal input module includes: a five pin interface J1 and a three pin interface J2 for connecting external sensors; the input/output ends IO0, IO1, IO2, IO3 and IO4 of the five-pin interface J1 are respectively and correspondingly connected with the digital signal input/output ends PD4, PD0, PD1, PD2 and PD3 of the main control chip CC 2538; an input/output end IO _ T of the three-pin interface J2 is connected with a digital signal input/output end PB4 of the main control chip CC2538, a power supply end VCC of the three-pin interface J2 is connected with an output end VCC of the power supply module, and a ground end GND of the three-pin interface J2 is grounded.

Preferably, the wireless sensor node further comprises: the JTAG module is connected with the main control module in a bidirectional way; the JTAG module includes: a pin 1 of the JTAG interface P _ JTAG is connected with a test clock end JTAG _ TCK of the main control chip CC2538, pins 2 and 20 of the JTAG interface P _ JTAG are grounded, a pin 4 of the JTAG interface P _ JTAG is connected with a test mode selection end JTAG _ TMS of the main control chip CC2538, a pin 5 of the JTAG interface P _ JTAG is connected with a digital signal input/output end PA6 of the main control chip CC2538, a pin 7 and a pin 9 of the JTAG interface P _ JTAG are connected with an output end VCC of the power supply module, a pin 11 of the JTAG interface P _ JTAG is connected with a digital signal input/output end PC0 of the main control chip CC2538, a pin 13 of the JTAG interface P _ JTAG is connected with a digital signal input/output end PC1 of the main control chip CC2538, a pin 15 of the JTAG interface P _ JTAG is connected with a system reset signal end nReset of the main control chip CC2538 through a resistor R10, the system reset signal terminal nReset of the main control chip CC2538 is also grounded through a capacitor C16, a 17 pin of the JTAG interface P _ JTAG is connected to the test data serial input terminal JTAG _ TDI of the main control chip CC2538, and a 19 pin of the JTAG interface P _ JTAG is connected to the test data serial output terminal JTAG _ TDO of the main control chip CC 2538.

Accordingly, a remote multifunctional wireless sensor system, which is mainly composed of the wireless sensor nodes as described above.

Compared with the prior art, the invention has the following beneficial effects:

1. the wireless sensor node provided by the invention has the advantages that the communication distance between the nodes is increased by adding the range expansion module, the coverage range of a network is enlarged, the cost performance is high, and the cost is lower; and various flexible communication modes such as WIFI transmission, USB transmission, RS-232 serial port transmission and the like are adopted, so that the practicability is high.

2. The wireless sensor node provided by the invention can be powered by an external direct-current power supply and a storage battery, so that the sensor node can stably work under different application environments and application purposes; and two main power supply modes of the wireless sensor node can be automatically switched through the main control module, so that the power supply of the whole system is conveniently ensured.

3. The USB module of the wireless sensor node has a normal data transmission function, can realize power supply of an external power supply, and further increases the power supply mode of the wireless sensor node.

4. In the invention, the radio frequency of the main control chip can be set through the JTAG module, so that the distance of the node transmission signals is adjusted, the nodes are reasonably distributed, and the coverage range of the network is expanded according to actual requirements.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a remote multifunctional wireless sensor node according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of a remote multifunctional wireless sensor node according to the present invention;

fig. 3 is a schematic structural diagram of a third embodiment of a remote multifunctional wireless sensor node according to the present invention;

fig. 4 is a schematic structural diagram of a fourth embodiment of a remote multifunctional wireless sensor node according to the present invention;

fig. 5 is a schematic structural diagram of a fifth embodiment of a remote multifunctional wireless sensor node according to the present invention;

fig. 6 to 9 are schematic circuit schematic structural diagrams of an embodiment of a remote multifunctional wireless sensor node according to the present invention;

in the figure: 101 is a main control module, 102 is an antenna module, 103 is a communication module, 104 is an acquisition signal input module, 105 is a power supply module, 106 is a range expansion module, 107 is a matched filtering unit, 108 is a JTAG module, 109 is an LCD display module, 110 is an expansion storage module, 1031 is a WIFI circuit, 1032 is a USB circuit, 1033 is an RS-232 serial port circuit, 1051 is a storage battery unit, 1052 is a direct-current power supply unit, and 1053 is an energy management unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a remote multifunctional wireless sensor node, fig. 1 is a schematic structural diagram of a first embodiment, and as shown in fig. 1, the remote multifunctional wireless sensor node may include: the wireless sensor node comprises a main control module 101, an antenna module 102, a communication module 103, an acquired signal input module 104 and a power supply module 105, wherein the main control module 101 is respectively connected with the antenna module 102 and the communication module 103 in a bidirectional mode, the output end of the acquired signal input module 104 is electrically connected with the input end of the main control module 101, and the power supply module 105 supplies power to the whole wireless sensor node; the wireless sensor node may further include: a range extension module 106, the communication module 103 comprising: a WIFI circuit 1031, a USB circuit 1032 and an RS-232 serial port circuit 1033; the main control module 101 is bidirectionally connected to the antenna module 102 through the range extension module 106, and a matched filtering unit 107 is disposed between the range extension module 106 and the main control module 101.

The wireless sensor node provided by the embodiment increases the communication distance between the nodes by adding the range expansion module, enlarges the coverage area of a network, and has high cost performance and lower cost; and various flexible communication modes such as WIFI transmission, USB transmission, RS-232 serial port transmission and the like are adopted, so that the practicability is high.

Fig. 2 is a schematic structural diagram of a second embodiment of a remote multifunctional wireless sensor node provided in the present invention, as shown in fig. 2, based on the first embodiment, the power module 105 may include: the power supply system comprises a storage battery unit 1051, a direct current power supply unit 1052 and an energy management unit 1053, wherein an output end of the storage battery unit 1051 and an output end of the direct current power supply unit 1052 are respectively and electrically connected with an input end of the energy management unit 1053, and an output end of the energy management unit 1053 is an output end of the power supply module 105.

The wireless sensor node provided by the embodiment can be powered by an external direct-current power supply and a storage battery, so that the sensor node can stably work under different application environments and application purposes; and two main power supply modes of the wireless sensor node can be automatically switched through the main control module, so that the power supply of the whole system is conveniently ensured. In addition, the USB module of the wireless sensor node in the embodiment of the invention not only has a normal data transmission function, but also can realize power supply of an external power supply, and further increases the power supply mode of the wireless sensor node.

In practical application, the working environment of a wireless sensor network system is generally severe, and nodes are usually placed in places where people cannot conveniently and frequently arrive, so that it is particularly important to maintain a stable working state and maintain a long working life. One important factor affecting the operational lifetime of a wireless sensor network is energy supply. Each network node needs to be able to manage its own energy supply in order to maximize the network lifetime, and the minimum operating lifetime of the node becomes an important factor limiting the normal operation of the network system. Meanwhile, in order to ensure the simplicity of constructing the WSN, the WSN is not suitable for using an external power supply mode for a long time, and many occasions do not have the external power supply condition, so the selection of the power supply mode is particularly important in the service life of the wireless sensor network. The power supply is selected by comprehensively considering various factors such as capacity, service life, cost, volume design complexity and the like. Three indexes of the capacity, the chargeable performance and the cost of the selected battery are mainly considered. The battery power supply is the most common power supply mode at present, the batteries are various, and the batteries can be divided into rechargeable batteries and non-rechargeable batteries according to whether the batteries can be charged or not; the battery may be classified into a nickel-cadmium battery, a lithium battery, a silver-zinc battery, etc., according to the battery material. The lead-acid battery has larger volume, but has the advantages of low price, simple charging and large capacity, and the lead-acid battery has poor memory effect, can be charged in a floating charging mode without influencing the service life of the lead-acid battery, and is suitable for being used as a power supply of a sensor node. According to practical application, a lead-acid battery with the specification of 6V4.5AH can be selected as the node power supply.

Fig. 3 is a schematic structural diagram of a third embodiment of a remote multifunctional wireless sensor node provided in the present invention, as shown in fig. 3, on the basis of the second embodiment, the wireless sensor node may further include: a JTAG module 108, wherein the JTAG module 108 is bidirectionally connected with the main control module 101.

In this embodiment, the radio frequency of the main control chip can be set through the JTAG module 108, so as to adjust the distance between the nodes for transmitting signals, and to reasonably arrange the nodes, thereby enlarging the coverage area of the network according to actual requirements.

Fig. 4 is a schematic structural diagram of a fourth embodiment of a remote multifunctional wireless sensor node provided in the present invention, as shown in fig. 4, on the basis of the third embodiment, the wireless sensor node may further include: and the input end of the LCD display module 109 is electrically connected with the output end of the main control module 101.

In this embodiment, the LCD display module 109 can display data (e.g., temperature) of the sensor node, so that the sensor node has a friendly man-machine interaction function.

Fig. 5 is a schematic structural diagram of a fifth embodiment of a remote multifunctional wireless sensor node provided by the present invention, as shown in fig. 5, on the basis of the fourth embodiment, the wireless sensor node may further include: an extended storage module 110, wherein the extended storage module 110 is bidirectionally connected to the main control module 101.

In practical applications, when the amount of collected data is large, the shortage of storage space of the node processor will result in data loss, even the node loses its working capability, and the working life of the node is affected, so that in necessary application occasions, the memory needs to be expanded. In specific implementation, the extended memory also needs to consider various indexes such as data storage time and quiescent current consumption, so as to ensure the maximization of the service life of the node.

Fig. 6 to 9 are schematic circuit schematic structural diagrams of an embodiment of a remote multifunctional wireless sensor node provided in the present invention, and as shown in fig. 6 to 9, the main control module 101 may include: the main control chip CC2538, the range extension module 106 includes: the rf front-end chip CC2592, the matched filtering unit 107 may include: inductance L1, resistance R1, resistance R2 and resistance R3, the antenna module 102 may include: an antenna interface M1 and an antenna interface M2; the inductor L1 is respectively connected in parallel between a video signal input/output terminal RF _ P and a video signal input/output terminal RF _ N of the main control chip CC2538, and between a video signal input/output terminal RF _ P and a video signal input/output terminal RF _ N of the radio frequency front-end chip CC2592, the digital control terminal PA _ EN of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PC3 of the main control chip CC2538 through a resistor R1, the digital control terminal LNA _ EN of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PC2 of the main control chip CC2538 through a resistor R2, and the digital control terminal HGM of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PD2 of the main control chip CC2538 through a resistor R3; power supply terminals VDD _ PA, VDD _ LNA and VDD _ BLAS of the radio frequency front-end chip CC2592 are all connected to an output terminal VCC of the power supply module 105, and the output terminal VCC of the power supply module 105 is grounded through a capacitor C1, a capacitor C2 and a capacitor C3 respectively; an antenna connection end ANT of the radio frequency front-end chip CC2592 is connected with an antenna interface M2 sequentially through an inductor L2, an inductor L4 and a capacitor C8, a connection line between the inductor L4 and the capacitor C8 is connected with the antenna interface M1 through a capacitor C7, an inductor L3 is connected between the antenna connection end ANT of the radio frequency front-end chip CC2592 and an output end VCC of the power module 105 in series, the antenna connection end ANT of the radio frequency front-end chip CC2592 is further grounded through a capacitor C4, a connection line between the inductor L2 and the inductor L4 is grounded through a capacitor C5, a connection line between the inductor L4 and the capacitor C8 is grounded through a capacitor C6, and a connection line between the capacitor C8 and the antenna interface M2 is grounded through a capacitor C9; the input BIAS terminal BIAS of the rf front-end chip CC2592 is grounded through a resistor R4, and the ground terminals GND and EGP/GND of the rf front-end chip CC2592 are grounded.

The main control chip in this embodiment selects CC2538, the on-chip FLASH is 512KB, the RAM is 32KB, and the RF transceiver with a working frequency of 2.4GHz and conforming to ieee802.15.4 standard is integrated therein. In the most power-saving external interrupt mode, the power supply current of the chip is only 0.4 muA, and the design requirement of low power consumption is met. Compared with other ZigBee chips, CC2538 has absolute advantages. The radio frequency front end chip adopts a CC2592 chip. The CC2592 device is a range extender for CC25XX 2.4GHz low power RF transceivers, transmitters, and system-on-chip products. The CC2592 device is an economical, efficient and high-performance RF front-end chip with low power, low voltage and frequency of 2.4GHz for wireless application, and is suitable for 2.4GHz wireless application with low voltage and low power consumption. Seamless interfaces can be provided for 2.4GHz transceivers and system-on-chip products, and the radio frequency performance is improved. CC2592 integrates power amplifiers, low noise amplifiers, baluns, switches, radio frequency matching networks, etc. In order to increase the link budget, the CC2592 device provides a power amplifier that can increase the output power, and an LNA with a low noise figure to improve the receiver sensitivity; also provided is a very small size, high output power RF design that utilizes a 4mm x 4mm quad flat no lead (QFN) -16 package; including PAs, LNAs, switches, RF matching and baluns, as required for simple design of high performance wireless applications.

In this embodiment, CC2538 is used as a transceiver, CC2592 is used as a strong RF front end, which can expand the communication range and improve the RF performance, and the antenna is used for receiving and transmitting RF signals between nodes. The CC2538 can set various different transmitting powers through software, the communication distance between nodes can reach two kilometers at most theoretically, and the communication distance between the nodes can be adjusted according to different application occasions through setting the transmitting power. The matched filter unit 107 in this embodiment is substantially a balun circuit, and functions to balance the currents. According to the antenna theory, the dipole antenna belongs to a balanced antenna, the coaxial cable belongs to an unbalanced transmission line, if the dipole antenna is directly connected with the unbalanced transmission line, high-frequency current flows through the outer skin of the coaxial cable, according to the transmission principle of the coaxial cable, the high-frequency current flows in the cable, the outer skin is a shielding layer without current, the radiation of the antenna is influenced, the shielding layer of the cable also participates in the radiation of electric waves, therefore, a balance converter is added between the antenna and the cable, the current flowing into the outer part of the shielding layer of the cable is restrained, and the high-frequency current flowing through the outer skin of the shielding layer of the cable from a vibrator is cut off. The balun circuit converts and matches the differential signal of the transceiver chip with the single-ended signal of the antenna. In the present embodiment, the antenna module 102 reserves two antenna interfaces, M1 is connected to a whip antenna, M2 is connected to a microstrip antenna (i.e., patch antenna), and a first whip antenna is used in an actual board manufacturing process.

Further, the WIFI circuit 1031 may include: WIFI interface P _ WIFI, the USB circuit 1032 may include: USB interface P _ USB, the RS-232 serial port circuit 1033 includes: RS-232 transceiver U1 and serial port interface DB 9; a power supply terminal VCC of the WIFI interface P _ WIFI is connected to an output terminal VCC of the power supply module 105, a ground terminal GND of the WIFI interface P _ WIFI is grounded, a serial port transmitting terminal TXD of the WIFI interface P _ WIFI is connected to a digital signal input/output terminal PA0 of the main control chip CC2538, a serial port transmitting terminal RXD of the WIFI interface P _ WIFI is connected to a digital signal input/output terminal PA1 of the main control chip CC2538, a reset terminal RST of the WIFI interface P _ WIFI is connected to a digital signal input/output terminal PB2 of the main control chip CC2538, and a mode selecting terminal IO _0 of the WIFI interface P _ WIFI is connected to a digital signal input/output terminal PB3 of the main control chip CC 2538; the data transmission positive terminal D + of the USB interface P _ USB is connected with the USB signal transmission positive terminal USB _ P of the main control chip CC2538 through a resistor R13, the data transmission negative terminal D-of the USB interface P _ USB is connected with the USB signal transmission negative terminal USB _ N of the main control chip CC2538 through a resistor R14, the USB signal transmission positive terminal USB _ P of the main control chip CC2538 is grounded through a capacitor C19, the USB signal transmission positive and negative terminals USB _ N of the main control chip CC2538 are grounded through a capacitor C20, and the data transmission positive terminal D + of the USB interface P _ USB is also connected with the digital signal input/output terminal PC0 of the main control chip CC2538 through a resistor R12; a power supply terminal VCC of the RS-232 transceiver U1 is connected with an output terminal VCC of the power supply module 105, a charge pump positive voltage generation terminal V + of the RS-232 transceiver U1 is connected with the power supply terminal VCC of the RS-232 transceiver U1 through a capacitor C23, a charge pump negative voltage generation terminal V-of the RS-232 transceiver U1 is grounded through a capacitor C24, and a ground terminal GND of the RS-232 transceiver U1 is grounded; a capacitor C21 is connected in series between a voltage-multiplying charge pump capacitor positive end C1+ and a voltage-multiplying charge pump capacitor negative end C1-of the RS-232 transceiver U1, and a capacitor C22 is connected in series between an inverting charge pump capacitor positive end C2+ and a voltage-multiplying charge pump capacitor negative end C2-of the RS-232 transceiver U1; the input end of a TTL/CMOS transmitter of the RS-232 transceiver U1 is connected with the cathode of a diode D4, the output end of a TTL/CMOS receiver of the RS-232 transceiver U1 is connected with the cathode of a diode D3, the input end of an RS-232 receiver of the RS-232 transceiver U1 is connected with the serial port interface DB9, the output end of an RS-232 transmitter of the RS-232 transceiver U1 is connected with the serial port interface DB9, and the ground end GND of the serial port interface DB9 is grounded; the anode of the diode D4 is connected to the output terminal VCC of the power module 105 through a pull-up resistor R17, the anode of the diode D4 is further connected to the digital signal input/output terminal PC6 of the main control chip CC2538, the anode of the diode D3 is connected to the output terminal VCC of the power module 105 through a pull-up resistor R16, and the anode of the diode D3 is further connected to the digital signal input/output terminal PC7 of the main control chip CC 2538.

In this embodiment, the WIFI interface P _ WIFI adopts an integrated module ATK-ESP8266, a main chip of which is RT9193, and RT9193 has only 5 pins. The ATK-ESP8266 module supports LVTTL serial ports, is compatible with 3.3V and 5V single chip microcomputer systems, and can be conveniently connected with the CC 2538. The module supports the mode of serial port to WIFI STA, serial port to AP and WIFI STA + WIFI AP, so that a serial port-WIFI data transmission scheme is established quickly, and the device can transmit data by using the Internet conveniently.

Because the interfaces between the PC and the singlechip are inconsistent, the matching of the interfaces is realized through the chip, data can be normally transmitted to the wireless data transmission module, and the wireless data transmission module is transmitted out through the antenna. PL2303 interface converter realizes the conversion from USB to serial port. PL2303 has the following characteristics: USB specification 2.0 (full speed compatible); the chip is internally provided with a USB1.1 transceiver, a voltage stabilizer for converting 5V into 3.3V and a crystal oscillator of 12 MHz; supporting an RS232 serial interface; a large flow control mechanism; a configurable 512-byte bidirectional data buffer; the wake-up function is supported by inputting relevant modulation signals from a remote place; two general purpose I/O (GPIO) pins; the configuration may be stored in an external EEPROM at start-up.

The RS-232 transceiver U1 may be of the type max3232, and may have a supply voltage of 3.3V-5V. max3232 implements the RS-232 function.

Still further, the USB circuit 1032 may further include: an input end IN of the voltage conversion chip U2 is connected to a power end VCC of the USB interface P _ USB, an input end IN of the voltage conversion chip U2 is further grounded through a capacitor C17, an output end OUT of the voltage conversion chip U2 is connected to a USB power supply end DVDD _ USB of the main control chip CC2538, an output end OUT of the voltage conversion chip U2 is further grounded through a capacitor C18, and a ground end GND of the voltage conversion chip U2 is grounded.

The type of the voltage conversion chip U2 can be TLV70233, pins directly use a reserved USB interface of the main chip CC2538, and the circuit can realize an external power supply function besides a USB data transmission function.

Further, the energy management unit 1053 may include: a power controller U3 and a voltage conversion chip U4; a main Power supply input terminal Vin of the Power controller U3 is connected to an output terminal Power1 of the dc Power supply unit 1052, an output terminal Power1 of the dc Power supply unit 1052 is connected to ground through a capacitor C31, an output terminal Power1 of the dc Power supply unit 1052 is further connected to a drain of a PMOS transistor Q3, a source of the PMOS transistor Q3 is connected to a source of a PMOS transistor Q4, a drain of the PMOS transistor Q4 is connected to a drain of a PMOS transistor Q2, a source of the PMOS transistor Q2 is connected to a source of a PMOS transistor Q1, a source of the PMOS transistor Q1 is connected to an output terminal Power2 of the storage battery unit 1051, and an output terminal Power2 of the dc Power supply unit 1051 is connected to ground through a capacitor C30; the GATE of the PMOS transistor Q3 and the GATE of the PMOS transistor Q4 are both connected to the GATE driving terminal GATE of the power controller U3, the GATE of the PMOS transistor Q1 and the GATE of the PMOS transistor Q2 are both connected to the status signal output terminal STAT of the power controller U3 through a resistor R18, and the logic level control signal input terminal CTL of the power controller U3 is connected to the digital signal input/output terminal PD5 of the main control chip CC 2538; the drain of the PMOS transistor Q2 is further connected to the auxiliary power input SENSE of the power controller U3, and the drain of the PMOS transistor Q2 and the drain of the PMOS transistor Q4 are both grounded through a capacitor C29; the drain electrode of PMOS transistor Q2 the drain electrode of PMOS transistor Q4 all with voltage conversion chip U4's INPUT INPUT links to each other, voltage conversion chip U4's INPUT INPUT is through electric capacity C25, electric capacity C26 ground connection respectively, voltage conversion chip U4's earthing terminal ADJ/GND ground connection, voltage conversion chip U4's OUTPUT OUTPUT, TAB do power module 105's OUTPUT VCC, power module 105's OUTPUT VCC is through electric capacity C27, electric capacity C28 ground connection respectively.

In the embodiment, two power supplies are adopted, and when one power supply is low in voltage or unavailable, the other power supply needs to be switched to. The voltage conversion chip U4 can adopt an LM1117 voltage reduction chip, can convert external voltage into 3.3V voltage and supplies power to the whole circuit. The power controller U3 can adopt an LTC4414 chip, is suitable for controlling the on-off and switching of a power supply, can be used as a high-end power switch, and is a power P-EFT controller. The input voltage is 3.5V-36V, the range is wide, the grid clamping protection and the battery reverse polarity protection of an external P-MOSFET are provided, manual control and microcontroller control can be performed, the high-current P-channel power MOSFET can be driven, the quiescent current is as small as microampere level, peripheral devices are required during use, and the circuit is simple, convenient and quick to develop and use. The standard MSOP8 package is used, which saves board space greatly. The power supply selector can supply power to the internal circuit from a VIN end or a SENSE end, the amplifier can amplify the difference value of input voltage of the VIN end and the input voltage of the SENSE end, the comparator can compare the difference voltage with an internal reference voltage source (0.5V), the output is determined by the analog controller, and the internal circuit further comprises a grid voltage clamping protection circuit, an open-drain output FET, the analog controller, a voltage-current conversion circuit and a 3.5 muA pull-down current source. The CTL is a pin of the microcontroller, and when the main control chip CC2538 applies a low level to the CTL, Power is supplied from Power1, regardless of whether its voltage is higher or lower than the auxiliary Power supply Power2, and when a level higher than 0.9V is applied to the CTL terminal, Power is supplied to the load from Power2 even if the Power2 voltage is lower than the main Power supply Power 1. Two P-MOSFETs are used at output ends of Power1 and Power2, the MOSFETs are provided with internal diodes, and a back-to-back structure is adopted to prevent two paths of Power supplies from continuously supplying Power to a load when the MOS tubes are switched off. The main Power supply can be restored only when the CTL terminal is low and the main Power supply Power1 voltage is higher than Power 2. The output capacitor has enough capacitance to ensure that the output voltage change is small at the moment of switching, and the practical 220 muF capacitor can ensure that the main control chip CC2538 can normally work at the moment of switching without restarting.

In the embodiment, seamless switching can be realized when two Power supplies are switched, Power1 is used as a main Power supply, when an external direct-current Power supply is connected through Power1, current is input to a Power selector from a Vin end of LTC4414 to supply Power to the inside, an analog controller outputs a low level to a grid of an internal FET according to an internal comparator through a clamping protection circuit and a linear grid driver according to the internal comparator, so that external PMOS transistors Q4 and Q3 are switched on, when Q4 and Q3 are switched on, the analog controller outputs the low level to the grid of the internal FET according to the output of the internal comparator, the FET is switched off, an STAT pin is switched on and output, a pull-up resistor R18 is required to reach a Power supply pin, so that the true high level can be reached, and the PMOS transistors Q1 and Q2 are switched off. When an auxiliary power supply such as an AC adapter is applied, the analog controller will send a high level to the GATE terminal, the voltage is the voltage of the SENSE pin, and the PMOS transistors Q4, Q3 are turned off. When the auxiliary power supply supplies power to the load, the analog controller also outputs a high level to the grid electrode of the internal FET, the voltage of the STAT pin is pulled to the ground level due to the conduction of the FET, and the current flowing through the FET is required to be 5mA in rain, so that the resistance value of the pull-up resistor R18 is required to be selected appropriately.

Further, the acquisition signal input module 104 may include: a five pin interface J1 and a three pin interface J2 for connecting external sensors; the input/output ends IO0, IO1, IO2, IO3 and IO4 of the five-pin interface J1 are respectively and correspondingly connected with the digital signal input/output ends PD4, PD0, PD1, PD2 and PD3 of the main control chip CC 2538; an input/output end IO _ T of the three-pin interface J2 is connected to a digital signal input/output end PB4 of the main control chip CC2538, a power supply end VCC of the three-pin interface J2 is connected to an output end VCC of the power supply module 105, and a ground end GND of the three-pin interface J2 is grounded.

In specific implementation, different input interfaces may be used according to specific models of external sensors, for example, for the temperature sensor DHT11, since it has five pins, the temperature data collected by it is transmitted to the main control chip CC2538 by using the five-pin interface J1. For the five-pin interface J1, it can be used not only to access external sensors, but also to develop other functions.

Further, the JTAG module 108 may include: a pin 1 of the JTAG interface P _ JTAG is connected to a test clock terminal JTAG _ TCK of the main control chip CC2538, pins 2 and 20 of the JTAG interface P _ JTAG are grounded, pin 4 of the JTAG interface P _ JTAG is connected to a test mode selection terminal JTAG _ TMS of the main control chip CC2538, pin 5 of the JTAG interface P _ JTAG is connected to a digital signal input/output terminal PA6 of the main control chip CC2538, pin 7 and pin 9 of the JTAG interface P _ JTAG are connected to an output terminal VCC of the power module 105, pin 11 of the JTAG interface P _ JTAG is connected to a digital signal input/output terminal PC0 of the main control chip CC2538, pin 13 of the JTAG interface P _ JTAG is connected to a digital signal input/output terminal PC1 of the main control chip CC2538, pin 15 of the JTAG interface P _ JTAG is connected to a system reset signal terminal ResnReset of the main control chip CC2538 through a resistor R10, the system reset signal terminal nReset of the main control chip CC2538 is also grounded through a capacitor C16, a 17 pin of the JTAG interface P _ JTAG is connected to the test data serial input terminal JTAG _ TDI of the main control chip CC2538, and a 19 pin of the JTAG interface P _ JTAG is connected to the test data serial output terminal JTAG _ TDO of the main control chip CC 2538.

In this embodiment, the radio frequency of the main control chip can be set through the JTAG module 108, so as to adjust the distance between the nodes for transmitting signals, and to reasonably arrange the nodes, thereby enlarging the coverage area of the network according to actual requirements.

Further, the LCD display module 109 includes: the LCD interface P _ LCD, the D0 end of LCD interface P _ LCD with main control chip CC 2538's digital signal input/output end PA2 links to each other, the CD end of LCD interface P _ LCD with main control chip CC 2538's digital signal input/output end PA4 links to each other, the RST end of LCD interface P _ LCD with main control chip CC 2538's digital signal input/output end PB2 links to each other, the D1 end of LCD interface P _ LCD with main control chip CC 2538's digital signal input/output end PA3 links to each other, the VDD end of LCD interface P _ LCD with power module 105's output VCC links to each other, the GND end of LCD interface P _ LCD ground.

In specific implementation, the LCD display module 109 may adopt an integrated module with a 2.4-inch high-definition liquid crystal color screen serial port, and mainly considers that the pins of the CC2538 are insufficient (the remaining 14 pins except each functional module) and cannot be externally connected with a screen with more pins, while the TFT-LCD integrated module only needs 8 pins, and has the advantages of less pins and simple operation.

Further, a clock terminal XOSC32M _ Q1 of the main control chip CC2538 is grounded through a capacitor C13, and the clock terminal XOSC32M _ Q1 is further connected to one end of a crystal oscillator Y2; the clock end XOSC32M _ Q2 of the main control chip CC2538 is grounded through a capacitor C12, and the clock end XOSC32M _ Q2 is further connected to the other end of the crystal oscillator Y2. A clock end PD6/XOSC32K _ Q1 of the main control chip CC2538 is grounded through a resistor R7 and a capacitor C15 in sequence, and a connecting line between the resistor R7 and the capacitor C15 is connected with one end of a crystal oscillator Y1; the clock end PD6/XOSC32K _ Q2 of the main control chip CC2538 is grounded through a resistor R6 and a capacitor C14 in sequence, and a connecting line between the resistor R6 and the capacitor C14 is connected with the other end of a crystal oscillator Y1.

Furthermore, the clock terminal PD6/XOSC32K _ Q1 of the master chip CC2538 is connected to the jumper cap P1 through a resistor R9, and the clock terminal PD6/XOSC32K _ Q2 of the master chip CC2538 is connected to the jumper cap P1 through a resistor R8.

Further, the reference current BIAS terminal R _ BIAS of the main control chip CC2538 is grounded through a resistor R5; a decoupling capacitor end DCOUPL1 and a decoupling capacitor end DCOUPL2 of the main control chip CC2538 are respectively and correspondingly grounded through a capacitor C11 and a capacitor C10, and the decoupling capacitor end DCOUPL1 and the decoupling capacitor end DCOUPL2 are connected with each other.

The invention also provides a remote multifunctional wireless sensor system which mainly comprises the wireless sensor nodes.

The remote multifunctional wireless sensor network node provided by the invention has the advantages of flexible power supply mode, remote wireless communication function, complete interface, friendly man-machine interaction design, high reliability design of circuits and wireless WIFI fusion technology, and can efficiently and flexibly complete related functions such as information acquisition, information processing and the like in a wireless sensor network system. The invention expands the network coverage rate, reduces the number of working nodes in the same working area and improves the working efficiency of the nodes.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It will be appreciated that the relevant features in the sensor network system described above may refer to the features of the sensor nodes. In addition, "first embodiment," "second embodiment," and the like in the above embodiments are used to distinguish the embodiments, and do not represent the merits of the embodiments. In the embodiments provided in the present application, it should be understood that the disclosed sensor node and system may be implemented by other specific circuit principle structures.

The algorithms and displays involved in the operation of the sensor node are not inherently related to any particular computer program carrier, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such nodes is apparent from the above description. In addition, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (4)

1. A remote multifunctional wireless sensor node, comprising: the wireless sensor node comprises a main control module (101), an antenna module (102), a communication module (103), a collected signal input module (104) and a power supply module (105), wherein the main control module (101) is respectively connected with the antenna module (102) and the communication module (103) in a bidirectional mode, the output end of the collected signal input module (104) is electrically connected with the input end of the main control module (101), and the power supply module (105) supplies power to the whole wireless sensor node; the method is characterized in that: the wireless sensor node further comprises: a range expansion module (106), the communication module (103) comprising: a WIFI circuit (1031), a USB circuit (1032) and an RS-232 serial port circuit (1033); the main control module (101) is bidirectionally connected with the antenna module (102) through the range expansion module (106), and a matched filtering unit (107) is arranged between the range expansion module (106) and the main control module (101);

the wireless sensor node further comprises: the LCD display module (109) and the expansion storage module (110), wherein the input end of the LCD display module (109) is electrically connected with the output end of the main control module (101), and the expansion storage module (110) is bidirectionally connected with the main control module (101);

the power supply module (105) comprises: the power supply system comprises a storage battery unit (1051), a direct current power supply unit (1052) and an energy management unit (1053), wherein the output end of the storage battery unit (1051) and the output end of the direct current power supply unit (1052) are respectively and electrically connected with the input end of the energy management unit (1053), and the output end of the energy management unit (1053) is the output end of the power supply module (105);

the master control module (101) comprises: a main control chip CC2538, the range extension module (106) comprising: a radio frequency front end chip CC2592, the matched filtering unit (107) comprising: inductance L1, resistance R1, resistance R2 and resistance R3, the antenna module (102) includes: an antenna interface M1 and an antenna interface M2;

the inductor L1 is respectively connected in parallel between a video signal input/output terminal RF _ P and a video signal input/output terminal RF _ N of the main control chip CC2538, and between a video signal input/output terminal RF _ P and a video signal input/output terminal RF _ N of the radio frequency front-end chip CC2592, the digital control terminal PA _ EN of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PC3 of the main control chip CC2538 through a resistor R1, the digital control terminal LNA _ EN of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PC2 of the main control chip CC2538 through a resistor R2, and the digital control terminal HGM of the radio frequency front-end chip CC2592 is connected to the digital signal input/output terminal PD2 of the main control chip CC2538 through a resistor R3; power supply terminals VDD _ PA, VDD _ LNA and VDD _ BLAS of the radio frequency front-end chip CC2592 are all connected to an output terminal VCC of the power supply module (105), and the output terminal VCC of the power supply module (105) is grounded through a capacitor C1, a capacitor C2 and a capacitor C3 respectively; an antenna connection end ANT of the radio frequency front-end chip CC2592 is connected with an antenna interface M2 sequentially through an inductor L2, an inductor L4 and a capacitor C8, a connection line between the inductor L4 and the capacitor C8 is connected with the antenna interface M1 through a capacitor C7, an inductor L3 is connected between the antenna connection end ANT of the radio frequency front-end chip CC2592 and an output end VCC of the power module (105) in series, the antenna connection end ANT of the radio frequency front-end chip CC2592 is further grounded through a capacitor C4, the connection line between the inductor L2 and the inductor L4 is grounded through a capacitor C5, the connection line between the inductor L4 and the capacitor C8 is grounded through a capacitor C6, and the connection line between the capacitor C8 and the antenna interface M2 is grounded through a capacitor C9; the input BIAS terminal BIAS of the radio frequency front-end chip CC2592 is grounded through a resistor R4, and the ground terminal GND and EGP/GND of the radio frequency front-end chip CC2592 are grounded;

the WIFI circuit (1031) comprises: a WIFI interface P _ WIFI, the USB circuit (1032) comprising: USB interface P _ USB, the RS-232 serial port circuit (1033) includes: RS-232 transceiver U1 and serial port interface DB 9;

a power supply terminal VCC of the WIFI interface P _ WIFI is connected with an output terminal VCC of the power supply module (105), a ground terminal GND of the WIFI interface P _ WIFI is grounded, a serial port sending terminal TXD of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PA0 of the main control chip CC2538, a serial port sending terminal RXD of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PA1 of the main control chip CC2538, a reset terminal RST of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PB2 of the main control chip CC2538, and a mode selection terminal IO _0 of the WIFI interface P _ WIFI is connected with a digital signal input/output terminal PB3 of the main control chip CC 2538;

the data transmission positive terminal D + of the USB interface P _ USB is connected with the USB signal transmission positive terminal USB _ P of the main control chip CC2538 through a resistor R13, the data transmission negative terminal D-of the USB interface P _ USB is connected with the USB signal transmission negative terminal USB _ N of the main control chip CC2538 through a resistor R14, the USB signal transmission positive terminal USB _ P of the main control chip CC2538 is grounded through a capacitor C19, the USB signal transmission positive and negative terminals USB _ N of the main control chip CC2538 are grounded through a capacitor C20, and the data transmission positive terminal D + of the USB interface P _ USB is also connected with the digital signal input/output terminal PC0 of the main control chip CC2538 through a resistor R12;

a power supply terminal VCC of the RS-232 transceiver U1 is connected with an output terminal VCC of the power supply module 105, a charge pump positive voltage generation terminal V + of the RS-232 transceiver U1 is connected with the power supply terminal VCC of the RS-232 transceiver U1 through a capacitor C23, a charge pump negative voltage generation terminal V-of the RS-232 transceiver U1 is grounded through a capacitor C24, and a ground terminal GND of the RS-232 transceiver U1 is grounded; a capacitor C21 is connected in series between a voltage-multiplying charge pump capacitor positive end C1+ and a voltage-multiplying charge pump capacitor negative end C1-of the RS-232 transceiver U1, and a capacitor C22 is connected in series between an inverting charge pump capacitor positive end C2+ and a voltage-multiplying charge pump capacitor negative end C2-of the RS-232 transceiver U1; the input end of a TTL/CMOS transmitter of the RS-232 transceiver U1 is connected with the cathode of a diode D4, the output end of a TTL/CMOS receiver of the RS-232 transceiver U1 is connected with the cathode of a diode D3, the input end of an RS-232 receiver of the RS-232 transceiver U1 is connected with the serial port interface DB9, the output end of an RS-232 transmitter of the RS-232 transceiver U1 is connected with the serial port interface DB9, and the ground end GND of the serial port interface DB9 is grounded; the anode of the diode D4 is connected to the output VCC of the power module (105) through a pull-up resistor R17, the anode of the diode D4 is also connected to the digital signal input/output PC6 of the main control chip CC2538, the anode of the diode D3 is connected to the output VCC of the power module (105) through a pull-up resistor R16, and the anode of the diode D3 is also connected to the digital signal input/output PC7 of the main control chip CC 2538;

the USB circuit (1032) further comprises: an input end IN of the voltage conversion chip U2 is connected to a power end VCC of the USB interface P _ USB, an input end IN of the voltage conversion chip U2 is further grounded through a capacitor C17, an output end OUT of the voltage conversion chip U2 is connected to a USB power supply end DVDD _ USB of the main control chip CC2538, an output end OUT of the voltage conversion chip U2 is further grounded through a capacitor C18, and a ground end GND of the voltage conversion chip U2 is grounded.

2. The remote multifunctional wireless sensor node of claim 1, wherein: the energy management unit (1053) comprises: a power controller U3 and a voltage conversion chip U4; a main Power supply input terminal Vin of the Power controller U3 is connected to an output terminal Power1 of the dc Power supply unit (1052), an output terminal Power1 of the dc Power supply unit (1052) is connected to ground through a capacitor C31, an output terminal Power1 of the dc Power supply unit (1052) is further connected to a drain of a PMOS transistor Q3, a source of the PMOS transistor Q3 is connected to a source of a PMOS transistor Q4, a drain of the PMOS transistor Q4 is connected to a drain of a PMOS transistor Q2, a source of the PMOS transistor Q2 is connected to a source of a PMOS transistor Q1, a source of the PMOS transistor Q1 is connected to an output terminal Power2 of the accumulator unit (1051), and an output terminal Power2 of the dc Power supply unit (1051) is connected to ground through a capacitor C30; the GATE of the PMOS transistor Q3 and the GATE of the PMOS transistor Q4 are both connected to the GATE driving terminal GATE of the power controller U3, the GATE of the PMOS transistor Q1 and the GATE of the PMOS transistor Q2 are both connected to the status signal output terminal STAT of the power controller U3 through a resistor R18, and the logic level control signal input terminal CTL of the power controller U3 is connected to the digital signal input/output terminal PD5 of the main control chip CC 2538; the drain of the PMOS transistor Q2 is further connected to the auxiliary power input SENSE of the power controller U3, and the drain of the PMOS transistor Q2 and the drain of the PMOS transistor Q4 are both grounded through a capacitor C29;

the drain electrode of PMOS transistor Q2 the drain electrode of PMOS transistor Q4 all with voltage conversion chip U4's INPUT INPUT links to each other, voltage conversion chip U4's INPUT INPUT is through electric capacity C25, electric capacity C26 ground connection respectively, voltage conversion chip U4's earthing terminal ADJ/GND ground connection, voltage conversion chip U4's OUTPUT OUTPUT, TAB do power module 105's OUTPUT VCC, power module (105)'s OUTPUT VCC is through electric capacity C27, electric capacity C28 ground connection respectively.

3. The remote multifunctional wireless sensor node of claim 1, wherein: the acquisition signal input module (104) comprises: a five pin interface J1 and a three pin interface J2 for connecting external sensors; the input/output ends IO0, IO1, IO2, IO3 and IO4 of the five-pin interface J1 are respectively and correspondingly connected with the digital signal input/output ends PD4, PD0, PD1, PD2 and PD3 of the main control chip CC 2538; an input/output end IO _ T of the three-pin interface J2 is connected with a digital signal input/output end PB4 of the main control chip CC2538, a power supply end VCC of the three-pin interface J2 is connected with an output end VCC of the power supply module (105), and a ground end GND of the three-pin interface J2 is grounded.

4. The remote multifunctional wireless sensor node of claim 1, wherein: the wireless sensor node further comprises: a JTAG module (108), wherein the JTAG module (108) is bidirectionally connected with the main control module (101);

the JTAG module (108) includes: a pin 1 of the JTAG interface P _ JTAG is connected with a test clock terminal JTAG _ TCK of the main control chip CC2538, pins 2 and 20 of the JTAG interface P _ JTAG are grounded, pin 4 of the JTAG interface P _ JTAG is connected with a test mode selection terminal JTAG _ TMS of the main control chip CC2538, pin 5 of the JTAG interface P _ JTAG is connected with a digital signal input/output terminal PA6 of the main control chip CC2538, pin 7 and pin 9 of the JTAG interface P _ JTAG are connected with an output terminal VCC of the power supply module (105), pin 11 of the JTAG interface P _ JTAG is connected with a digital signal input/output terminal PC0 of the main control chip CC2538, pin 13 of the JTAG interface P _ JTAG is connected with a digital signal input/output terminal PC1 of the main control chip CC2538, and pin 15 of the JTAG interface P _ JTAG is connected with a system reset signal terminal ResnReset of the main control chip CC2538 through a resistor R10, the system reset signal terminal nReset of the main control chip CC2538 is also grounded through a capacitor C16, a 17 pin of the JTAG interface P _ JTAG is connected to the test data serial input terminal JTAG _ TDI of the main control chip CC2538, and a 19 pin of the JTAG interface P _ JTAG is connected to the test data serial output terminal JTAG _ TDO of the main control chip CC 2538.

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