CN202904848U - Cathode protection data automatic acquisition system based on wireless sensor network - Google Patents
Cathode protection data automatic acquisition system based on wireless sensor network Download PDFInfo
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Abstract
The utility model relates to a cathodic protection data automatic acquisition system based on wireless sensor network. The system is based on a radio frequency transceiver CC1110 and adopts a time division multiplexing working mode, and the whole system mainly comprises a solar power supply module, a power supply circuit, the radio frequency transceiver CC1110, a downlink and an uplink; the solar power supply module is connected with the radio frequency single chip microcomputer, the input of the radio frequency single chip microcomputer is connected with data acquisition, the output of the radio frequency single chip microcomputer is connected with the impedance conversion circuit, the output and the input of the impedance conversion circuit are respectively connected with the input and the output of the first radio frequency switch, the output of the first radio frequency switch is connected with the downlink, the output of the downlink is connected with the second radio frequency switch, one output of the second radio frequency switch receives the transmitting antenna, the other output of the second radio frequency switch is connected with the uplink, and the output of the uplink is connected back; the switch control output of the radio frequency single chip microcomputer is connected with the first radio frequency switch and the second radio frequency switch. The system realizes automatic data acquisition, transmission and timing monitoring.
Description
Technical field
The utility model is a kind of cathodic protection automatic data acquisition system based on wireless sensor network, relates to general corrosion protection and the piping system technical field of metal material.
Technical background
Pipeline transportation is one of five large means of transportation of national economy, and energy conveyance conduit usually will pass through the very long monitoring area in hardship.Be security, the reliability of guarantee pipeline transportation, setting up powerful, intelligent monitoring and webmaster system is the direction of nearest pipeline development.
The demand of reality is the power that is promoting the development of new technology, and over the past two years, the wireless sensor network that develops rapidly (WSN:Wireless Sensor Network) had greatly been expanded the coverage of present monitor network.Provide new thinking for solving existing data acquisition modes.WSN normally forms by being deployed in cheap microsensor nodes a large amount of in the surveyed area, form the network system of more than one self-organization by communication, its objective is the information of perceptive object in collaboratively perception, the acquisition and processing network's coverage area, and send to the observer.
CN101426290A discloses a kind of general wireless sensor network node equipment, but goes back imperfection, and effect is unsatisfactory.
Although now to the research of wireless sensor network in carrying out like a raging fire, the monitoring of energy conveyance conduit and way to manage are but still take manually as main.In remote area, the data acquisition cost is large; When data volume was larger, the cost of data management was larger; Difficulty is more.Lack one and can realize automatic data collection in pipeline transportation, regularly the system of monitoring ensures the pipe safety operation.
The utility model content
The purpose of this utility model is the cathodic protection automatic data acquisition system based on wireless sensor network of a kind of automatic data collection of design, transmission, timing monitoring.
Cathodic protection automatic data acquisition system based on wireless sensor network is to be connected in series by two wires to N hardware node from first hardware node ED.
Wireless sensor network node is take the chip radio-frequency (RF) transceiver CC1110 of Texas Instrument as the basis, adopt the time division multiplex working method, whole system mainly is comprised of solar powered module and feed circuit, radio-frequency (RF) transceiver CC1110, radio frequency downlink (mainly comprising radio-frequency front-end power amplifier, 3db electric bridge), radio frequency up-link (low noise amplifier, radio-frequency (RF) switch).Solar powered module connects the radio frequency single-chip microcomputer, the input of radio frequency single-chip microcomputer connects data acquisition, the output of radio frequency single-chip microcomputer connects impedance inverter circuit, impedance inverter circuit output and input connect respectively the input and output of the first radio-frequency (RF) switch, the output of the first radio-frequency (RF) switch connects the radio frequency downlink, and the output of radio frequency downlink connects the second radio-frequency (RF) switch, and one output of the second radio-frequency (RF) switch receives sends out antenna, another output connects line link, and the output of radio frequency up-link takes back the first radio-frequency (RF) switch.The switch control output of radio frequency single-chip microcomputer connects the first radio-frequency (RF) switch and closes the second radio-frequency (RF) switch.
Described solar powered module is an efficient electric power system, and it can be reached more than 90% by the conversion efficiency of 12V lithium battery to circuit each several part required voltage.It comprises solar panel, charge management circuit, rechargeable battery, mu balanced circuit; Solar panel, charge management circuit, rechargeable battery, mu balanced circuit are connected in series successively, and mu balanced circuit output meets transceiver CC1110.Circuit design is so that powered battery has large voltage dynamic range, and all can guarantee when cell voltage is between the 12V to 4.5V provides stable supply voltage for subordinate's circuit.Whole supply module is comprised of solar panel, charge management circuit, rechargeable battery set (lithium battery), mu balanced circuit, lightning prevention circuit.The protections such as charge management circuit prevents from overcharging for charging and discharging lithium battery provides, excessively puts, long battery; Mu balanced circuit provides the required 3.3V of work and 4V burning voltage for wireless sensor network node, and maximum can provide its voltage transitions efficient of supply current up to 6A to reach 95%; Lightning protection circuit provides open-air lightening protection for node; by Transient Suppression Diode (TVS) and can recover being used in combination of protective tube and effectively reach the lightning protection purpose; when having high-voltage great-current to pour in when being subject to being struck by lightning, TVS can be limited in high voltage in the safe range with the speed of p level second.Recover simultaneously protective tube and fuse in meeting, make feed circuit open circuit to protect late-class circuit safety.
Described radio-frequency (RF) transceiver CC1110 is that wireless sensor network node carries out the core that data retransmission is processed.It is the real wireless SOC of a kind of low cost, uses for low-consumption wireless and designs.Enhancement mode 8051MCU and a radio transmitting and receiving chip CC1100 that this chip has comprised a standard are encapsulated in the chip of a 6 * 6mm.8051MCU carries 32K Flash and 4K RAM.Radio communication operates mainly in 315,433,868 and the ISM(of 915MHz industry, science and medical science) and the SRD(short-range device) frequency band, can freely be set to 300-348MHz, 391-464MHz and 728-928MHz in ISM band.The RF radio-frequency (RF) transceiver of CC1110 is integrated highly configurable modulator-demodular unit.This modulator-demodular unit is supported different modulation formats, and its data transmission rate can reach 500kbps.Be integrated in forward error recovery option on the modulator-demodular unit by unlatching, performance is got a promotion.CC1110 provides widely hardware supported for processing data packets, data buffering, burst transfers of data, clear channel estimating, quality of connection indication and electromagnetic wave excites.CC1110 is responsible for carrying out data communication with data acquisition unit in native system, and finishes the data packing, and data retransmission, data check, are realized the function such as frequency hopping at emissive power control, system standby/wake up.
Described radio frequency downlink mainly contains the radio-frequency front-end power amplifier, the 3db electric bridge forms; Radio-frequency front-end power amplifier and 3db electric bridge are connected in series successively.This is the key that realizes the node telecommunication.The radio frequency downlink adopts the balance amplifier design, use 2 3dB hybrid couplers and 2 radio-frequency power amplifier chips to consist of symmetric circuit, by isolation incoming signal and reflected signal, thereby realize the smooth standing-wave ratio (SWR) with reducing input, output port that the frequency band range internal power gains; Application balance amplifier design can be so that the emissive power of node when using a slice power amplifier separately improves 3dB, improved the range of application of the less power amplifier of emissive power, so that system's maximum transmission power reaches 5.3W.Simultaneously, the balanced amplifier design has more advantage than single-ended amplifier aspect reliability and the redundancy: show as amplifier performance after an amplifier of balanced amplifier is calculated badly and descend, the gain of amplifier and noise only reduce 3dB, and are unlikely to make amplifier to quit work.
The sample mode of multistage linear system cascade of described radio frequency up-link, use noise figure to receive as the first order as the low noise amplifier (LNA) of 24db as 0.5db and gain, the second level is made of the Passive LC wave filter, and third part is that CC1110 built-in chip type low noise amplifier consists of.Since before the multi-stage cascade system noise factor mainly is subjected to what particularly the impact of the first order is larger, therefore reduce the noise figure of the first order and suitably improve its power gain and can effectively reduce the entire system noise figure.Be better than-112dBm through the test macro receiving sensitivity.
Described system communication interface uses the I of international standard
2C communication protocol.I
2The C bus is a kind of for I
2The bidirectional two-line that connects between C device bus processed can be hung a plurality of devices above it, and logical two lines connect, very little of taking up room, and the length of bus can be up to 25 feet, and can support 4 assemblies with the peak transfer rate of 10Kbps, simultaneously at I
2The equipment that can receive and send on the C bus can become master controller.System passes through I
2C bus interface and oil and gas pipes cathodic protection data acquisition equipment carry out the data interconnection intercommunication.
Described radio-frequency (RF) switch is by the radio-frequency (RF) switch control circuit path is received/sent out to node by CC1110 chip I/O mouth to select.In prime small-signal situation, use P1dB to be the miniwatt single-pole double throw RF switch of 7.9W, adopt under the rear class large-signal that tolerable power reaches 50W under the accepting state, tolerable power is greater than the single-pole double throw RF switch of the PIN tubular construction of 300W, to satisfy the designing requirement under the different capacity transmission under the emission state.
The electric principle of cathodic protection automatic data acquisition system hardware node is:
The solar charging circuit principle mainly is comprised of U6 charging management chip LT3652 as shown in Figure 3.The 2 pin ground connection of connection terminal BAT J1,1 pin is 1 pin that meets U1 behind voltage stabilizing diode D1, two connect 3 pin of U1, three connect 2 pin of U6 through resistance R 1,2 pin of U6 are through resistance R 5 ground connection, four 4 pin through resistance R 3 and emitting led D3 series connection U6,5 pin of Five Classics resistance R 2 and LED D4 series connection U1; 1 pin of U1 is also through capacitor C 1 ground connection, and 6 pin of U6 are through resistance R 8 ground connection; 7 pin of U6 are through resistance R 7 and resistance R 9 series connection ground connection, 8 pin of U6 are through resistance NCP18XH1 ground connection, 9 pin of U6 are between resistance R 6 connecting resistance R7 and resistance R 9,9 pin of U6 connect 1 pin of connection terminal BAT J2, and the 1 pin shunt-wound capacitance C3 of connection terminal BAT J2 and capacitor C 4 are to ground, the 2 pin ground connection of BAT J2; 10 pin of U1 connect 1 pin of BAT J2 through resistance R 4; 11 pin of U6 connect 1 pin of BAT J2 through diode Q1; Connect capacitor C 2 between 11 pin of U6 and 12 pin; 12 pin of U6 connect 10 pin of U6 in addition through voltage stabilizing diode D2 ground connection through inductance L 1.
The system power supply circuit theory as shown in Figure 4, mainly by U15(voltage stabilizing chip PHT08T230W), triode U16 (MMBT2222), U17 (voltage stabilizing chip MAX8881EUT50-T) form.The 2 pin ground connection of connection terminal CON2J4,1 pin is through voltage stabilizing diode D3 ground connection, and behind insurance F1, be V1-12V, the first via connects 2 pin of U15 behind this point, 2 pin of U15 link to each other with 9 pin, and through bistable press that diode D7, LED D4 connect with resistance R 23, capacitor C 54, capacitor C 55 four road connect after ground connection; 1 pin of U15 and 6 pin ground connection, 7 pin are through resistance R 24 ground connection; 4 pin of U15 and the collector that meets U16 after 5 pin link to each other, the collector of U16 also has one the tunnel to connect base stage through resistance R 22, base stage is through Q1 ground connection, two the tunnel through LED D5 and ground connection after resistance R 25 is connected, three the tunnel through capacitor C 57 ground connection, four the tunnel through capacitor C ground connection, and the emitter of U16 is through LED D6 and ground connection after resistance R 26 is connected, and output meets VCC3V3; The second tunnel of V1-12V is 1 pin that V1 meets U17, and 1 pin connects 5 pin through resistance R 27,1 foot meridian capacitor C59 ground connection, and 3 pin of U17 link to each other with 4 pin by capacitor C 58 one tunnel ground connection, and another road meets VCC5V.
Radio frequency single-chip microcomputer and data acquisition-the control chip circuit theory as shown in Figure 5; It mainly is comprised of U1, and U1 is radio-frequency (RF) transceiver CC1110; 1 pin of U1 meets P1_2,36 pin meet power amplifier switch control port Vcnt, 2 pin, 10 pin, 28 pin, 29 pin meet VCC3V3,30 foot meridian capacitor C10 ground connection, 4 pin through resistance R 1 with meet VCC3V3 after LED D1 connects, 3 pin through resistance R 2 with meet VCC3V3 after LED D2 connects, 31 foot meridian capacitor C18 ground connection, and meet VCC3V3 through resistance R 3,19 pin, 22 pin, 25 pin, 26 pin meet VCC3V3,23 pin are through inductance L 1 and ground connection after capacitor C 11 is connected, 24 foot meridian capacitor C16 ground connection, and behind inductance L 4 and 3 foot meridian capacitor C12, join, inductance L 2 connect after joining, inductance L 3, meet TO_1110 after the capacitor C 13 threes series connection, inductance L 2, capacitor C 14 ground connection are arranged, inductance L 3 between the inductance L 3, capacitor C 15 ground connection are arranged between the capacitor C 13; Meet crystal oscillator Y2 between 17 pin, 18 pin, crystal oscillator Y2 two ends are respectively through capacitor C 20 and capacitor C 21 ground connection; Meet crystal oscillator Y1 between 20 pin, 21 pin, crystal oscillator Y1 two ends are respectively through capacitor C 17 and capacitor C 19 ground connection; 27 pin are through resistance R 4 ground connection, 37 pin ground connection; 5 pin of U1 and 6 pin connect 3 pin and 4 pin of jumper terminal J7, and 1 pin of jumper terminal J7 and 2 pin connect 3 pin and 4 pin of U1; Program download port JTAG downloads the 1 pin ground connection of mouthful XS1, and 2 pin meet VCC3V3, and 3 pin and 4 pin connect 16 pin and 15 pin of U1, and 5 pin and 6 pin connect 35 pin and 34 pin of U1, and 7 pin and 8 pin connect 31 pin and 33 pin of U1, and 9 pin connect 32 pin of U1; The 3 pin ground connection of jumper terminal J1,1 pin and 2 pin connect respectively 7 pin and 8 pin of U1; 1 pin of jumper terminal J2 and 2 pin connect respectively 12 pin and 13 pin of U1, and each meets VCC3V3 through resistance R 7 and resistance R 6; The 3 pin ground connection of jumper terminal J5,1 pin and 2 pin connect respectively 11 pin and 9 pin of U1.
Radio frequency downlink circuitry principle as shown in Figure 6; It mainly is comprised of power amplifier chip U2,3db electric bridge chip U3,3db electric bridge chip U4, power amplifier chip U5; 1 pin of U2,3 pin, 5 pin, 6 pin, 7 pin, 9 pin, 13 pin ground connection, 1 pin of U5,3 pin, 5 pin, 6 pin, 7 pin, 9 pin, 13 pin ground connection; The 5 pin ground connection of 5 pin of U3 and U4; 2 pin of U3 are through resistance R 12 ground connection, and 2 pin of U4 are through resistance R 13 ground connection; 1 pin of U3 meets Send, and 3 pin of U4 meet AA1; 3 pin of U3 connect 2 pin of U2, and 4 pin connect the pin of U5; 2 pin of U4 connect 8 pin of U2, and 1 pin connects 8 pin of U5; 4 pin of U2 meet VCC4V5 and through capacitor C 28 and capacitor C 29 earths; 10 pin of U2 meet VCC4V5 and through capacitor C 26 and capacitor C 27 earths; 11 pin of U2 meet power amplifier switch control port Vcnt and through capacitor C 24 and capacitor C 25 earths; 12 pin of U2 meet VCC4V5 and through capacitor C 22 and capacitor C 23 earths; 4 pin of U5 meet VCC4V5 and through capacitor C 40 and capacitor C 41 earths; 10 pin of U5 meet VCC4V5 and through capacitor C 34 and capacitor C 35 earths; 11 pin of U5 meet power amplifier switch control port Vcnt and through capacitor C 32 and capacitor C 33 earths; 12 pin of U5 meet VCC4V5 and through capacitor C 30 and capacitor C 31 earths.
Radio frequency up-link principle of work as shown in Figure 7; It mainly is comprised of U8 the low noise amplifier chip HMC616; The pin of U8 and 17 pin ground connection, 8 foot meridian capacitor C51 and resistance R 15 earths, 2 foot meridian capacitor C48 meet AA0 and through inductance L 10 ground connection, 11 pin meet radio-frequency (RF) switch receiving port Receive, 15 pin meet VCC4V5 through inductance L 7, and through capacitor C 44 and capacitor C 45 earths.
The utility model is as the portable set of a lithium battery power supply, has efficient electric power system, can reach more than 90% by the 12V lithium battery to the conversion efficiency of circuit each several part circuit required voltage, maximum can provide supply current up to 6A for circuit, mu balanced circuit all can guarantee to provide stable supply voltage for subordinate's circuit when cell voltage was between the 12V to 4.5V, so that powered battery has large voltage dynamic range, improved the service time that battery availability factor has increased node.
Power amplifier module of the present utility model (downlink) adopts the balance amplifier design, use 2 3dB hybrid couplers and 2 radio-frequency power amplifier chips to consist of symmetric circuit, by isolation incoming signal and reflected signal, thereby realize the smooth standing-wave ratio (SWR) with reducing input, output port that the frequency band range internal power gains; Application balance amplifier design can be so that the emissive power of node when using a slice power amplifier separately improves 3dB, improved the range of application of the less power amplifier of emissive power, so that system's maximum transmission power reaches 5.3W; Showing as amplifier performance after an amplifier of balanced amplifier is calculated badly descends, the gain of amplifier and noise only reduce 3dB, and being unlikely to make balanced amplifier to quit work, the balanced amplifier design has more advantage than single-ended amplifier aspect reliability and the redundancy.
The utility model designs according to petroleum pipe line cathodic protection automatic data acquisition system actual needs.According to the reality test, maximum transmission distance is not less than 4km between two nodes, satisfies requirement of system design.Simultaneously, the utlity model has the adjustable function of emissive power, can realize different distance two internodal proper communications.According between two nodes when the required distance of 1km connects up, can realize anti-bad point function by power control, improve the reliability of whole wireless sensor network.
The utlity model has good antijamming capability, can change whole wireless sensor network working frequency range by frequency modulation function, significantly improved the anti-electromagnetic interference capability of whole system, and then improved the reliability of wireless sensor network.
The utility model can be realized idle function, when needs carry out data acquisition by wireless sensor network, can wake up each node by the network terminal, thereby reduce each node power consumption of wireless sensor network, lengthens working hours.
The utility model adopts solar electric power supply system, uses lithium battery to power as node, and adopts the automatic administrative skill prolongation of battery lithium battery serviceable life.Power-supply system adopts lightning Protection Design, can effectively protect node not to be subjected to the infringement of large momentary current when being struck by lightning, Effective Raise the reliability of wireless sensor network field work.
Along with the continuous promotion and application of technology of Internet of things, wireless sensor network is just being brought into play more and more important effect in industrial or agricultural life now.Pipeline transportation is one of five large means of transportation of national economy, energy conveyance conduit usually will pass through the very long monitoring area in hardship, thereby wireless sensor network is applied in as unattended environment such as bridge, highway and oil and gas pipelines and has profound significance.The utility model has overcome in the existing pipeline transportation, data acquisition, pipe monitoring, data management all is the limitation of carrying out with the manual type of poor efficiency, realize the automatic operating of data acquisition, transmission, the whole process of processing, greatly improved data acquisition, transmission, the efficiency of management.And the utility model can carry out secondary development and be used for most data acquisition and data transmission occasion, has broad application prospects.
The utility model data can automatically gather, transmit, and regularly monitoring.
The utility model is applicable to the data acquisition of petroleum pipe line cathodic protection, realizes automatic collection, transmission, the management of cathodic protection data, is the invention of a Nover practical.
Description of drawings
The system architecture synoptic diagram of Fig. 1 cathodic protection automatic data acquisition system hardware node
Fig. 2 cathodic protection automatic data acquisition system hardware node theory diagram
Fig. 3 solar charging circuit schematic diagram
Fig. 4 system power supply circuit theory diagrams
Fig. 5 control chip circuit theory diagrams
Fig. 6 radio frequency downlink work electrical schematic diagram
Fig. 7 radio frequency up-link work electrical schematic diagram
Embodiment
In order better to understand above-mentioned functions of the present utility model, further describe in detail below in conjunction with accompanying drawing 1.
Embodiment. the wireless sensor network that this example (one-piece construction is seen accompanying drawing 1) consists of is a Linear Network, now the whole network course of work is described.
Wireless sensor network node is take the chip radio frequency single-chip microcomputer CC1110 of Texas Instrument as the basis, adopt the time division multiplex working method, whole system mainly is comprised of solar powered module, radio-frequency (RF) transceiver CC1110, downlink (mainly comprising radio-frequency front-end power amplifier, 3db electric bridge), up-link (low noise amplifier, radio-frequency (RF) switch).Solar powered module connects the radio frequency single-chip microcomputer, the input of radio frequency single-chip microcomputer connects data acquisition, the output of radio frequency single-chip microcomputer connects impedance inverter circuit, impedance inverter circuit output and input connect respectively the input and output of the first radio-frequency (RF) switch, the output of the first radio-frequency (RF) switch connects downlink, and the output of downlink connects the second radio-frequency (RF) switch, and one output of the second radio-frequency (RF) switch receives sends out antenna, another output connects line link, and up-link output takes back the first radio-frequency (RF) switch.The switch control output of radio frequency single-chip microcomputer connects the first radio-frequency (RF) switch and closes the second radio-frequency (RF) switch.
Wherein:
U1 selects CC1110;
U2 and U5 select SKYWCRKS;
U3 and U4 select HC1400P03;
U8 selects HMC616;
U15 selects PHT08T230;
U16 selects MMBT2222;
U17 selects MAX8881EUT50-T;
The Sink node is as start node, and it is the initiation node of network various command, also is the node that gathers of variety of network data.The supvr sends network instruction by host computer and by the Sink node, and the ED node is mail in instruction, and the ED node receives and can return the ACK confirmation as the front node after the instruction and receive, simultaneously instruction is passed successively toward next node; Actual laying distance between two adjacent ED nodes is 1 kilometer, when occur damaging node in the whole link for example during ED5, system at first can attempt therewith node communication, when attempting unsuccessfully, last node can increase that emissive power is skipped ED5 directly and next node communicates, thereby the assurance system continues reliable and stable operation.Therefore the utility model node actual transmissions distance can continue stabilized communication greater than 4 kilometers in the link situation that 3 nodes of appearance damage continuously.This design has improved system's reliability of operation greatly.
After each ED node was passed in the host computer instruction, the ED node was uploaded to the Sink node according to instruction successively with the pipeline data packing and along each node.Each ED node is responsible for the data of oneself are packed, and other nodes play the effect of data relay in the data upload process.In the data upload process, if there are not continuous damage 3 each above node in link, then system still can reliable and stablely move.
Through test, this example energy automatic data collection, transmission, regularly monitoring.
Claims (11)
1. cathodic protection automatic data acquisition system based on wireless sensor network, the cathodic protection automatic data acquisition system hardware node that it is characterized in that wireless sensor network is to be connected in series by two wires to N hardware node from first hardware node ED;
Based on the cathodic protection automatic data acquisition system of wireless sensor network take radio-frequency (RF) transceiver CC1110 as the basis, adopt the time division multiplex working method, whole system mainly is comprised of solar powered module and feed circuit, radio-frequency (RF) transceiver CC1110, radio frequency downlink, radio frequency up-link; Solar powered module connects the radio frequency single-chip microcomputer, the input of radio frequency single-chip microcomputer connects data acquisition, the output of radio frequency single-chip microcomputer connects impedance inverter circuit, impedance inverter circuit output and input connect respectively the input and output of the first radio-frequency (RF) switch, the output of the first radio-frequency (RF) switch connects the radio frequency downlink, and the output of radio frequency downlink connects the second radio-frequency (RF) switch, and one output of the second radio-frequency (RF) switch receives sends out antenna, another output connects the radio frequency up-link, and the output of radio frequency up-link takes back the first radio-frequency (RF) switch; The switch control output of radio frequency single-chip microcomputer connects the first radio-frequency (RF) switch and closes the second radio-frequency (RF) switch.
2. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described solar powered module comprises solar panel, charge management circuit, rechargeable battery, mu balanced circuit; Solar panel, charge management circuit, rechargeable battery, mu balanced circuit are connected in series successively, and mu balanced circuit output meets transceiver CC1110.
3. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described radio frequency downlink mainly is comprised of radio-frequency front-end power amplifier, 3db electric bridge; Radio-frequency front-end power amplifier and 3db electric bridge are connected in series successively; The radio frequency downlink adopts the balance amplifier design, use 2 3dB hybrid couplers and 2 radio-frequency power amplifier chips to consist of symmetric circuit, by isolation incoming signal and reflected signal, thereby realize the smooth standing-wave ratio (SWR) with reducing input, output port that the frequency band range internal power gains.
4. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1; it is characterized in that the sample mode of multistage linear system cascade of described radio frequency up-link; use noise figure to receive as the first order as the low noise amplifier of 24db as 0.5db and gain; the second level is made of the Passive LC wave filter, and third part is that CC1110 built-in chip type low noise amplifier consists of.
5. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described system communication interface uses the I of international standard
2C communication protocol; System passes through I
2C bus interface and oil and gas pipes cathodic protection data acquisition equipment carry out the data interconnection intercommunication.
6. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described radio-frequency (RF) switch is by the radio-frequency (RF) switch control circuit path is received/sent out to node by CC1110 chip I/O mouth to select; Use P1dB to be the miniwatt single-pole double throw RF switch of 7.9W in prime small-signal situation, adopt under the rear class large-signal that allowance power reaches 50W under the accepting state, allowance power is greater than the single-pole double throw RF switch of the PIN tubular construction of 300W under the emission state.
7. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described solar powered module mainly is comprised of U6 charging management chip LT3652; The 2 pin ground connection of connection terminal BAT J1,1 pin is 1 pin that meets U1 behind voltage stabilizing diode D1, two connect 3 pin of U1, three connect 2 pin of U6 through resistance R 1,2 pin of U6 are through resistance R 5 ground connection, four 4 pin through resistance R 3 and emitting led D3 series connection U6,5 pin of Five Classics resistance R 2 and emitting led D4 series connection U1; 1 pin of U1 is also through capacitor C 1 ground connection, and 6 pin of U6 are through resistance R 8 ground connection; 7 pin of U6 are through resistance R 7 and resistance R 9 series connection ground connection, 8 pin of U6 are through resistance NCP18XH1 ground connection, 9 pin of U6 are between resistance R 6 connecting resistance R7 and resistance R 9,9 pin of U6 connect 1 pin of connection terminal BAT J2, and the 1 pin shunt-wound capacitance C3 of connection terminal BAT J2 and capacitor C 4 are to ground, the 2 pin ground connection of BAT J2; 10 pin of U1 connect 1 pin of BAT J2 through resistance R 4; 11 pin of U6 connect 1 pin of BAT J2 through diode Q1; Connect capacitor C 2 between 11 pin of U6 and 12 pin; 12 pin of U6 connect 10 pin of U6 in addition through voltage stabilizing diode D2 ground connection through inductance L 1.
8. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described feed circuit mainly are comprised of U15 voltage stabilizing chip PHT08T230W, MMBT2222 triode U16, U17 voltage stabilizing chip MAX8881EUT50-T; The 2 pin ground connection of connection terminal CON2J4,1 pin is through voltage stabilizing diode D3 ground connection, and behind insurance F1, be V1-12V, the first via connects 2 pin of U15 behind this point, 2 pin of U15 link to each other with 9 pin, and through bistable press that diode D7, LED D4 connect with resistance R 23, capacitor C 54, capacitor C 55 four road connect after ground connection; 1 pin of U15 and 6 pin ground connection, 7 pin are through resistance R 24 ground connection; 4 pin of U15 and the collector that meets U16 after 5 pin link to each other, the collector of U16 also has one the tunnel to connect base stage through resistance R 22, base stage is through Q1 ground connection, two the tunnel through LED D5 and ground connection after resistance R 25 is connected, three the tunnel through capacitor C 57 ground connection, four the tunnel through capacitor C ground connection, and the emitter of U16 is through LED D6 and ground connection after resistance R 26 is connected, and output meets VCC3V3; The second tunnel of V1-12V is 1 pin that V1 meets U17, and 1 pin connects 5 pin through resistance R 27,1 foot meridian capacitor C59 ground connection, and 3 pin of U17 link to each other with 4 pin by capacitor C 58 one tunnel ground connection, and another road meets VCC5V.
9. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 1 is characterized in that described radio frequency single-chip microcomputer and data acquisition circuit mainly are comprised of U1, and U1 is radio-frequency (RF) transceiver CC1110; 1 pin of U1 meets P1_2,36 pin meet power amplifier switch control port Vcnt, 2 pin, 10 pin, 28 pin, 29 pin meet VCC3V3,30 foot meridian capacitor C10 ground connection, 4 pin through resistance R 1 with meet VCC3V3 after LED D1 connects, 3 pin through resistance R 2 with meet VCC3V3 after LED D2 connects, 31 foot meridian capacitor C18 ground connection, and meet VCC3V3 through resistance R 3,19 pin, 22 pin, 25 pin, 26 pin meet VCC3V3,23 pin are through inductance L 1 and ground connection after capacitor C 11 is connected, 24 foot meridian capacitor C16 ground connection, and behind inductance L 4 and 3 foot meridian capacitor C12, join, inductance L 2 connect after joining, inductance L 3, meet TO_1110 after the capacitor C 13 threes series connection, inductance L 2, capacitor C 14 ground connection are arranged, inductance L 3 between the inductance L 3, capacitor C 15 ground connection are arranged between the capacitor C 13; Meet crystal oscillator Y2 between 17 pin, 18 pin, crystal oscillator Y2 two ends are respectively through capacitor C 20 and capacitor C 21 ground connection; Meet crystal oscillator Y1 between 20 pin, 21 pin, crystal oscillator Y1 two ends are respectively through capacitor C 17 and capacitor C 19 ground connection; 27 pin are through resistance R 4 ground connection, 37 pin ground connection; 5 pin of U1 and 6 pin connect 3 pin and 4 pin of jumper terminal J7, and 1 pin of jumper terminal J7 and 2 pin connect 3 pin and 4 pin of U1; Program download port JTAG downloads the 1 pin ground connection of mouthful XS1, and 2 pin meet VCC3V3, and 3 pin and 4 pin connect 16 pin and 15 pin of U1, and 5 pin and 6 pin connect 35 pin and 34 pin of U1, and 7 pin and 8 pin connect 31 pin and 33 pin of U1, and 9 pin connect 32 pin of U1; The 3 pin ground connection of jumper terminal J1,1 pin and 2 pin connect respectively 7 pin and 8 pin of U1; 1 pin of jumper terminal J2 and 2 pin connect respectively 12 pin and 13 pin of U1, and each meets VCC3V3 through resistance R 7 and resistance R 6; The 3 pin ground connection of jumper terminal J5,1 pin and 2 pin connect respectively 11 pin and 9 pin of U1.
10. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 3 is characterized in that described radio frequency downlink circuitry mainly is comprised of power amplifier chip U2,3db electric bridge chip U3,3db electric bridge chip U4, power amplifier chip U5; 1 pin of U2,3 pin, 5 pin, 6 pin, 7 pin, 9 pin, 13 pin ground connection, 1 pin of U5,3 pin, 5 pin, 6 pin, 7 pin, 9 pin, 13 pin ground connection; The 5 pin ground connection of 5 pin of U3 and U4; 2 pin of U3 are through resistance R 12 ground connection, and 2 pin of U4 are through resistance R 13 ground connection; 1 pin of U3 meets Send, and 3 pin of U4 meet AA1; 3 pin of U3 connect 2 pin of U2, and 4 pin connect the pin of U5; 2 pin of U4 connect 8 pin of U2, and 1 pin connects 8 pin of U5; 4 pin of U2 meet VCC4V5 and through capacitor C 28 and capacitor C 29 earths; 10 pin of U2 meet VCC4V5 and through capacitor C 26 and capacitor C 27 earths; 11 pin of U2 meet power amplifier switch control port Vcnt and through capacitor C 24 and capacitor C 25 earths; 12 pin of U2 meet VCC4V5 and through capacitor C 22 and capacitor C 23 earths; 4 pin of U5 meet VCC4V5 and through capacitor C 40 and capacitor C 41 earths; 10 pin of U5 meet VCC4V5 and through capacitor C 34 and capacitor C 35 earths; 11 pin of U5 meet power amplifier switch control port Vcnt and through capacitor C 32 and capacitor C 33 earths; 12 pin of U5 meet VCC4V5 and through capacitor C 30 and capacitor C 31 earths.
11. the cathodic protection automatic data acquisition system based on wireless sensor network according to claim 4 is characterized in that described radio frequency up-link mainly is comprised of U8 the low noise amplifier chip HMC616; The pin of U8 and 17 pin ground connection, 8 foot meridian capacitor C51 and resistance R 15 earths, 2 foot meridian capacitor C48 meet AA0 and through inductance L 10 ground connection, 11 pin meet radio-frequency (RF) switch receiving port Receive, 15 pin meet VCC4V5 through inductance L 7, and through capacitor C 44 and capacitor C 45 earths.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220500516.9U CN202904848U (en) | 2012-09-28 | 2012-09-28 | Cathode protection data automatic acquisition system based on wireless sensor network |
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| CN201220500516.9U CN202904848U (en) | 2012-09-28 | 2012-09-28 | Cathode protection data automatic acquisition system based on wireless sensor network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608929A (en) * | 2017-08-04 | 2018-01-19 | 武汉影随科技合伙企业（有限合伙） | A kind of electronic equipment multistage interconnected method and interconnect device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608929A (en) * | 2017-08-04 | 2018-01-19 | 武汉影随科技合伙企业（有限合伙） | A kind of electronic equipment multistage interconnected method and interconnect device |
| CN107608929B (en) * | 2017-08-04 | 2020-11-06 | 武汉影随科技合伙企业（有限合伙） | Electronic equipment multistage interconnection method and interconnection device |
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