CN103344994A - Distributed transient electromagnetic data acquisition system based on wireless sensor network - Google Patents
Distributed transient electromagnetic data acquisition system based on wireless sensor network Download PDFInfo
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Abstract
The invention relates to a distributed transient electromagnetic data acquisition system based on a wireless sensor network. The distributed transient electromagnetic data acquisition system is composed of an industrial personal computer, a coordinator, a plurality of router nodes, a plurality of terminal acquisition nodes and the wireless sensor network serving as a basic network, wherein the router nodes and the terminal acquisition nodes are distributed flexibly. The industrial personal computer is connected with the coordinator through a USB, and the terminal acquisition nodes, the router nodes and all nodes of the coordinator are in wireless connection with one another; the terminal acquisition nodes are used for completing acquisition and uploading of transient electromagnetic data; the router nodes are used for completing the router addressing and data forwarding function; the coordinator is used for completing storage, display and USB communication of the acquired data; the industrial personal computer is used for controlling the acquisition process of each node, displaying the data, and completing calculation of obtained data exploration parameters. The distributed transient electromagnetic data acquisition system has high exploration accuracy, connection wires between the nodes are omitted, field operation is convenient, work efficiency is improved, modular design is adopted for the nodes, and maintenance and replacement are convenient.
Description
Technical field
The present invention relates to the geophysical exploration science and technology field, particularly a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network.
Background technology
The transient electromagnetic detecting technology is a kind of geophysical probing technique commonly used, be widely used in resource exploration, tectonic structure is surveyed, environmental surveys and monitoring, the effect that can not be substituted has been brought into play in reservoir basin substrate and the exploration of dam site crack etc. at the geophysical exploration Instrument technology field.
Traditional transient electromagnetic detecting adopts the single track emission, the mode of operation that single track receives, in order to strengthen signal to noise ratio (S/N ratio), improve acquisition precision, usually adopt the method for time domain stack, just with the electromagnetic signal cycle stack of gathering, average to eliminate the environment electromagnetics interference noise then and gather stochastic error, the number of times of stack is more many, and the time of collection is also just more long.Distributed transient electromagnetic detecting system then adopts a plurality of receivers to line up array and receives transition secondary field signal, the stack in territory, implementation space synchronously.The ability that distributed transient electromagnetic detecting system suppresses noise is strong, measures the efficient height, can obtain a large amount of observation datas, to realize accurate inversion interpretation.
In recent years, wireless sensor network technology is flourish, wireless sensor network has the characteristics such as microminiaturization, low cost and low-power consumption of self-organization characteristic and node, wireless sensor network technology is applied in the distributed transient electromagnetic data acquisition, can realize the multiple spot of search coverage is gathered synchronously, improve detection efficiency, obtain a large amount of observation datas, can obtain the accurate surveying image of observation area.
Summary of the invention
The objective of the invention is at existing transient electromagnetic detecting apparatus measures efficient low, data volume is few, and precision is lower, can only realize the deficiency that single track receives, and a kind of multiple spot collection based on wireless sensor network, the distributed Transient Electro-magnetic Data Acquisition System of networking flexibility are provided.
In order to achieve the above object, the technical scheme that the present invention takes is: a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network is provided, comprises industrial computer, telegon, terminal acquisition node and router node;
The distributed Transient Electro-magnetic Data Acquisition System of described wireless sensor network by industrial computer, telegon, and many groups router node and the terminal acquisition node laid flexibly be that basic networking constitutes with wireless sensor network, described industrial computer is connected with telegon by USB, telegon and many group router nodes, telegon and organize between terminal acquisition node, router node and router node, router node and the terminal acquisition node all by radio interconnected more;
Described terminal acquisition node comprises 24 high precision analogue converting units, field programmable logic device FPGA unit, and GPS synchronization module and wireless communication unit are finished the collection of twin-channel transient electromagnetic data and are uploaded;
Described router node is made of wireless communication unit and power module, finishes routing addressing and data forwarding capability;
Described telegon contains wireless communication unit, micro controller unit, and the data storage control unit, the touch liquid crystal display unit is for storage, demonstration and the usb communication of finishing image data;
Described industrial computer moves its monitoring software, is used for the control of each node gatherer process and presenting of data, surveys the basis that terminal node data obtain and finishes the exploration CALCULATION OF PARAMETERS finishing each.
The touch liquid crystal display unit of described telegon adopts the electric resistance touch-control LCDs.
Described telegon, the radio communication between router node and the terminal acquisition node adopt the Zigbee agreement to set up wireless sensor network.Described telegon, the step of router node and the networking of terminal acquisition node is: after the telegon initialization is finished, scanning channel at first, find out current location and set up the optimum channel of network, select a PANID as this network of network sign then, telegon began to intercept channel after network was set up and finished; The request that sends after terminal acquisition node and router node power on adds the network data frame, and telegon allows its adding network after receiving Frame, and is that it distributes mailing addresses in 16 unique nets.
Described telegon, router node and terminal acquisition node telegon all adopt the high-performance lithium battery as power supply, can improve the portability of equipment, the time of prolongation equipment field work.
Described terminal acquisition node of the present invention is gathered simulating signal by sensor, sensor is connected with low-noise simulation signal condition unit, low-noise simulation signal condition unit is connected with 24 high precision analogue converting units, field programmable logic device FPGA unit is connected with low-noise simulation signal condition unit with the GPS synchronization module respectively, and field programmable logic device FPGA unit is also two-way interconnected with 24 high precision analogue converting units and wireless communication unit respectively;
Field programmable logic device FPGA unit is connected with the two sensors signal end through 24 high precision analogue converting units of two-way, low-noise simulation signal condition unit in the described terminal acquisition node, makes the terminal acquisition node have the ability that 4 high precision transient electromagnetics of two-channel 2-4 data are gathered simultaneously.
The wireless communication unit of terminal acquisition node of the present invention arranges system operational parameters according to instruction after receiving the data acquisition instruction, gathers the transient electromagnetic signal; The transient electromagnetic signal is converted to digital quantity through low-noise simulation signal condition unit after 24 high precision analogue converting units, and data are temporary in the FPGA internal RAM; FPGA finishes the logic control of whole signal condition unit and 24 AD conversion unit; Wireless communication unit reads the data among the RAM and is packaged into one-node network image data bag, sends to router node or directly sends to telegon by wireless mode.
Telegon of the present invention is with the packet of the different terminals acquisition node that receives and/or receive after the packet that router node is transmitted is handled, integrated, be temporary among the static data storer SRAM, described data based user controls setting, transfers to industrial computer or is stored to USB storage by the demonstration of touch liquid crystal display unit or by USB.
Telegon of the present invention is by touch liquid crystal display unit configuration-system running parameter, or come the configuration-system running parameter by industrial computer operation monitoring software, the acquisition instructions that telegon sends comprises acquisition system active configuration parameter, the terminal acquisition node is gathered input transient electromagnetic signal according to configuration parameter work.
The USB storage of telegon of the present invention records data and the result of each terminal acquisition node, and microcontroller reads historical data and result by the data storage control unit from USB storage, and shows at the touch liquid crystal display unit.
The distributed Transient Electro-magnetic Data Acquisition System that the present invention is based on wireless sensor network compared with prior art has the following advantages:
1, the present invention adopts wireless sensor network, be that the Zigbee wireless communication technology is as the correspondence entity framework of distributed Transient Electro-magnetic Data Acquisition System, the characteristics that adapted to distributed measurement, wireless sensor network has the characteristics such as microminiaturization, low cost and low-power consumption of self-organization characteristic and node, wireless sensor network technology is applied in the distributed transient electromagnetic data acquisition, can realize the multiple spot of search coverage is gathered synchronously, improve detection efficiency, obtain a large amount of observation datas, to obtain the accurate surveying image of observation area.
2, Transient Electro-magnetic Data Acquisition System of the present invention can reduce electromagnetic interference noise by the multicycle superposed average, but for low frequency signal, because frequency is low, cycle is long, the repeated sampling working time in a large amount of cycles is long, efficient is low, and power consumption is big, so acquisition node needs higher precision and degree of stability.Adopt terminal acquisition node of the present invention low-noise simulation signal condition unit and 24 high precision analogue converting units can reduce the interference of electromagnetic noise, realization high precision, the collection of high-resolution transient electromagnetic signal.
3, telegon of the present invention adopts the usb communication interface of CY7C68013 realization and industrial computer, support plug and play, the convenient use, industrial computer operation monitoring software, can realize the control of each node gatherer process and presenting of data, survey the basis that terminal node data obtain and finish the exploration CALCULATION OF PARAMETERS finishing each.
Description of drawings
Fig. 1 is the distributed Transient Electro-magnetic Data Acquisition System structural representation that the present invention is based on wireless sensor network.
Fig. 2 is terminal acquisition node structural representation of the present invention.
Fig. 3 is router node structural representation of the present invention.
Fig. 4 is telegon structural representation of the present invention.
Fig. 5 is terminal acquisition node workflow diagram of the present invention.
Fig. 6 is telegon workflow diagram of the present invention.
Fig. 7 arranges an embodiment synoptic diagram for the distributed receiving coil of the present invention.
Fig. 8 is telegon one embodiment mounting structure synoptic diagram of the present invention.
Fig. 9 is terminal acquisition node one embodiment mounting structure synoptic diagram of the present invention.
Figure 10 is router node one embodiment mounting structure synoptic diagram of the present invention.
Among the above-mentioned figure: 1-telegon casing, 2-panel, 3-LCDs, 4-telegon antenna, 5-power switch, 6-USB interface, 7-middle layer dividing plate, 8-data transmission and storage control integrated circuit board, 9-telegon power supply, 10-telegon wireless communication unit integrated circuit board; 11-terminal acquisition node, 12-gps antenna, 13-terminal acquisition node antenna, 14-data collecting card, 15-receiving coil interface A, 16-terminal acquisition node wireless communication unit integrated circuit board, 17-terminal acquisition node power supply, 18-receiving coil interface B; The 21-router node, 22-router node antenna, 23-router node wireless communication unit integrated circuit board, 24-router node power supply; The 31-transmitting coil, the 32-receiving coil.
Embodiment
Below in conjunction with drawings and Examples the distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network of the present invention is made detailed specific description.
Embodiment 1: a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network of the present invention, one-piece construction as shown in Figure 1.The distributed Transient Electro-magnetic Data Acquisition System of described wireless sensor network by industrial computer, telegon, and many groups router node and the terminal acquisition node laid flexibly be that basic networking constitutes with wireless sensor network, described industrial computer is connected with telegon by USB, and telegon is with many group router nodes, telegon and organize terminal acquisition node, router node and router node, router node and terminal acquisition node all by radio interconnected more;
Be provided with the terminal acquisition node in the system, three kinds of nodes of router node and telegon communicate by wireless channel between each node, and communication frequency is selected the 2.4G frequency range for use, the Zigbee technology is set up wireless sensor network, and message transmission rate is up to 250Kbps.Packing directly was sent to telegon after the terminal acquisition node was gathered electromagnetic signal according to steering order and system configuration parameter, perhaps was sent to mediators handle by router node in the mode of multi-hop; The processing data packets of the different nodes that telegon will receive is temporary among the SRAM after integrating; Telegon is by liquid crystal display configuration-system running parameter, or come the configuration-system running parameter by the industrial computer monitoring software, the acquisition instructions that telegon sends comprises acquisition system active configuration parameter, and the terminal acquisition node is gathered the input electromagnetic signal according to configuration parameter work; The data storage cell of telegon is according to data and the result of each terminal acquisition node of setting recording.
Referring to Fig. 2, be terminal acquisition node structural representation of the present invention.The terminal acquisition node comprises low-noise simulation signal condition unit, 24 AD conversion unit (A/D), field programmable logic device, GPS synchronization module and wireless communication unit.Low-noise simulation signal condition unit comprises preposition amplification, filtering conditioning and program control amplification three parts of back level, the impedance conversion of preposition amplification realization and sensor and signal amplify and strengthen the driving force of late-class circuit, the filtering modulate circuit suppresses the outside electromagnetic interference signal, and the back program control amplification of level obtains best amplification with useful signal.24 AD conversion unit adopt 24 ∑s-△ analog to digital converter AD7762 of high-performance, low-power consumption, it possesses the input of broadband differential signal, 16 two-way simultaneous data-interfaces, switching rate reaches as high as 625Ksps, adopt the high-precision voltage reference source, make the resolution of system reach microvolt level level.Be converted to digital quantity after 24 high precision analogue converting units, data are temporary in the FPGA internal RAM; FPGA finishes the logic control of whole signal condition unit and 24 AD conversion unit.Wireless communication unit adopts the second generation ZigBee chip CC2530 of TI company, this chip has enhancement mode 8051 kernels, chip has also comprised DMA and RF wireless communication module simultaneously, not only can satisfy the demand of data transmission and radio communication, have advantages such as volume is little, low in energy consumption, external circuit is few simultaneously.The RF radio receiving transmitting module of CC2530 is operated in the 2.4GHz frequency range, this frequency range is one of two frequency ranges of IEEE802.15.4 definition, divided 16 physical channels on this frequency range altogether, traffic rate is 250Kbps, can satisfy system fully for the requirement of traffic rate.In addition, chip also is integrated with the SRAM of 8K, the 32/64/128/256KB flash block provides the non-volatile procedure stores of interior circuit programmable for equipment, and the present invention uses the CC2530F32 chip to have the flash memory of 256K, is large enough to hold complete ZigBee radio protocol stack and personal code work.Because under the condition of distributed measurement, distance is far between emission and the reception, and receiver is the array synchro measure, traditional line locking can not satisfy the actual measurement requirement, must use the GPS simultaneous techniques, the GPS synchronization module adopts the GPS control circuit to provide the high precision synchronous signal for system.The terminal acquisition node is mainly finished the collection of twin-channel transient electromagnetic data and is uploaded.
Fig. 3 is router node structural representation of the present invention.Router node is responsible for multi-hop and is transmitted the packet that the terminal acquisition node sends to telegon.Because the communication distance of node is limited, communication link is unimpeded in the monitored area can be arranged fixing router node assurance net according to certain network topology result, reduces the generation of data packet loss.Router node is made up of power module and wireless communication unit, and wireless communication unit is selected the CC2530F32 chip for use.
Fig. 4 is telegon structural representation of the present invention.Telegon contains wireless communication unit, micro controller unit, storage unit, liquid crystal display.Wireless communication unit is still selected the CC2530F32 chip for use, micro controller unit adopts the CY7C68013 chip, this chip is integrated USB2.0 transceiver, 8051 strengthen microcontroller, programmable input and output pin etc., the support of USB2.0 transceiver is the high-speed transfer of the highest 480Mb/s, and the present invention adopts CY7C68013 to realize the USB high speed data transfer with industrial computer.Described data memory module adopts integrated document storage management controller CH376, and CH376 internal USB agreement and FAT file system firmware are supported the portable non-volatile memory medium of big capacity, as SD card or big capacity USB flash drive.Described touch liquid crystal display module adopts industrial resistance type touch control screen.Described telegon is mainly finished the usb communication with industrial computer, the storage of image data, and data show.
Fig. 5 is terminal acquisition node workflow diagram of the present invention.The concrete course of work of described terminal acquisition node is:
1. system initialization and add network;
2. wait for and receive control command and the system acquisition configuration parameter that telegon sends;
If 3. there is control command to arrive, judge that at first this order is data acquisition command, forward to carry out next step, otherwise forward 2. step wait telegon order to after doing respective handling;
4. according to instruction and system configuration parameter system operational parameters is set;
5. start the A/D conversion, will be converted to digital signal through the electromagnetic signal after the signal condition;
6. judge whether the A/D conversion is finished, and does not finish and waits for that then it converts, and is temporary in the RAM memory block of FPGA inside after converting;
7. judge that whether counting of collection reach the default of system parameter setting and count, be less than default counting and then continue to carry out the A/D transfer process, reach default counting and then carry out next step;
8. wireless communication module is read image data and is packaged as the image data bag of single node from the RAM of FPGA storage, and sends to telegon;
9. packet is sent completely, and turns to for the 2. step.
In order to reduce the power consumption of terminal acquisition node.Wait for that at node node works in low-power consumption mode in the process of telegon control command, reduce the battery loss of node, thereby prolong the working time of node.
Fig. 6 is telegon workflow diagram of the present invention.Telegon is the maincenter of total system, is responsible for collecting the electromagnetic data that each terminal acquisition node sends downwards, and sends control command to each node; Upwards then finish the data of collecting demonstration, store and be transmitted to industrial computer, and obtain the configuration parameter of data acquisition command and system from touch screen or industrial computer.The concrete course of work of described coordinator node is:
(1) system initialization and building network;
(2) wait for collection control command and the system configuration parameter that touch screen or industrial computer send;
(3) if the control command arrival is arranged, whether data acquisition control is instructed at first to judge this order, carries out next step if then forward to, otherwise forwards (2) step wait touch screen or industrial computer steering order to after doing respective handling;
(4) instruct to the data acquisition of terminal acquisition node broadcast transmission;
(5) wait for and receive the one-node network image data bag that all terminal acquisition nodes send in the net;
All single-node data bags that (6) will receive are integrated, and are temporary among the SRAM;
(7) judge whether to store data, if the storage data are then carried out the data storage, the data storage finishes and then carries out next step, if need not the data storage, then directly carries out next step;
(8) microcontroller CY68013 reads the data among the FIFO, sends it to the touch liquid crystal display screen by serial ports then, and the touch liquid crystal display screen is drawn the die-away curve of transient electromagnetic secondary field according to data;
(9) judge whether to send data to industrial computer, if the configuration of original system configuration parameter sends data to industrial computer, then carry out next step, otherwise forward step (2) to;
(10) send packet by USB to industrial computer, data forward step (2) to after sending and finishing.
Fig. 7 arranges an embodiment for the distributed receiving coil that adopts among the present invention.Receiving coil 32 is positioned in the transmitting coil 31, and the number of receiving coil 32 determines that according to the size of search coverage the lead-in wire of receiving coil 32 is connected to the input end of analog signal of terminal acquisition node 11.
Fig. 8 is one embodiment of the invention telegon mounting structure synoptic diagram.Described instrument mounting structure comprises telegon casing 1, panel 2, LCDs 3, telegon antenna 4, power switch 5, USB interface 6, middle layer dividing plate 7, data transmission and storage control integrated circuit board 8, telegon power supply 9, telegon wireless communication unit integrated circuit board 10.Telegon antenna 4 is installed on the panel 2, and telegon antenna 4 is detachable; Telegon antenna 4 links to each other with telegon radio communication integrated circuit board 10 by concentric cable; LCDs 3 is installed in the middle of the panel 2; Power switch 5 is positioned on the panel 2, is the battery main switch of whole telegon; USB interface 6 has two, is positioned at side by side on the panel 2, and wherein 1 USB interface connects industrial computer, and another USB interface is supported the data storage of USB flash drive; Telegon wireless communication unit integrated circuit board 10 is fixed on the central dividing plate 7 with data transmission and storage control integrated circuit board 8, and jumbo telegon power supply 9 provides power supply for whole telegon.
Fig. 9,10 is terminal acquisition node of the present invention and router node mounting structure one embodiment.Terminal acquisition node 11 mounting structures comprise gps antenna 12 among Fig. 9, terminal acquisition node antenna 13, data collecting card 14, receiving coil interface A15, terminal acquisition node wireless communication unit integrated circuit board 16, terminal acquisition node power supply 17, receiving coil interface B18.
Described terminal acquisition node 11 all adopts aluminium shell with the entity of router node 21, and is firm small and exquisite, can adapt to abominable field environment simultaneously; Terminal acquisition node power supply 17, router node power supply 24 all adopts high-capacity lithium battery, to prolong System production time; Router node antenna 22 is connected with router node wireless communication unit integrated circuit board 23 by concentric cable, and terminal acquisition node antenna 13 is connected with terminal collection joint wireless communication unit integrated circuit board 16 by concentric cable.
Distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network of the present invention adopts the Zigbee agreement to set up wireless sensor network, the MANET process of search coverage node:
All be embedded with the ZigBee protocol stack in the wireless communication unit CC2530 chip of three types of nodes of native system, use ZStack-CC2530-2.4.0-1.4.0 protocol stack version.Because system node is more, the networking complexity adopts the heterogeneous network topological structure with a plurality of routers, in the ZigBee network, have only telegon that the right of building network is just arranged, after the coordinator node building network, allow the node of other non-telegon types to add this network.
The terminal acquisition node, the step of router node and telegon networking is: after the telegon initialization is finished, scanning channel at first, find out current location and set up the optimum channel of network, select a PANID as this network of network sign then, telegon began to intercept channel after network was set up and finished, and waited for that other nodes add network; The request that sends after terminal acquisition node and router node power on adds the network data frame, telegon allows it to add network after receiving Frame, and be the interior mailing addresses of 16 unique nets of its distribution, if the terminal acquisition node can not directly add network, can also add network by near router node.After the network construction success, terminal acquisition node and router node all periodically to telegon transmission packet, comprise the network address of this node in the data, and telegon just can use this network address to come to communicate with this node.
In an embodiment of the present invention, preferential, described terminal acquisition node adopts field programmable gate array (FPGA) device, model is the EP1C12T144 chip, this type FPGA device has suitable logical resource, pin resource and memory resource, being buffered in a slice FPGA device of the control of signal acquisition process and data finished, and the resource of device obtains the utilization of fullest, and it is optimum that performance reaches.
Selected chip is only for giving an example in the present embodiment, wherein central authorities control processing module adopts field programmable gate array (FPGA) device can select that resource is suitable, the fpga chip of low-power consumption for use, obtain better performance, reduce the power consumption of terminal acquisition node, lengthen working hours; Data memory module can select for use other can support the controller of data storage and file management arbitrarily; Towards large-scale exploration occasion, storage medium can be selected more jumbo solid state hard disc for use.
Distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network provided by the invention has higher surveying accuracy, saved connecting line between node and the node, made things convenient for field operation, increased work efficiency, node adopts modular design, is convenient to safeguard and change.
Claims (8)
1. the distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network comprises industrial computer, telegon, terminal acquisition node and router node; It is characterized in that:
The distributed Transient Electro-magnetic Data Acquisition System of described wireless sensor network by industrial computer, telegon, and many groups router node and the terminal acquisition node laid flexibly be that basic networking constitutes with wireless sensor network, described industrial computer is connected with telegon by USB, telegon and many group router nodes, telegon and organize between terminal acquisition node, router node and router node, router node and the terminal acquisition node all by radio interconnected more;
Described terminal acquisition node comprises 24 high precision analogue converting units, field programmable logic device FPGA unit, and GPS synchronization module and wireless communication unit are finished the collection of twin-channel transient electromagnetic data and are uploaded;
Described router node is made of wireless communication unit and power module, finishes routing addressing and data forwarding capability;
Described telegon contains wireless communication unit, micro controller unit, and the data storage control unit, the touch liquid crystal display unit is for storage, demonstration and the usb communication of finishing image data;
Described industrial computer moves its monitoring software, is used for the control of each node gatherer process and presenting of data, surveys the basis that terminal node data obtain and finishes the exploration CALCULATION OF PARAMETERS finishing each.
2. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1 is characterized in that: the touch liquid crystal display unit employing electric resistance touch-control LCDs of described telegon.
3. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1, it is characterized in that: described telegon, the radio communication between router node and the terminal acquisition node adopt the Zigbee agreement to set up wireless sensor network.
4. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1, it is characterized in that: described terminal acquisition node is gathered simulating signal by sensor, sensor is connected with low-noise simulation signal condition unit, low-noise simulation signal condition unit is connected with 24 high precision analogue converting units, field programmable logic device FPGA unit is connected with low-noise simulation signal condition unit with the GPS synchronization module respectively, and field programmable logic device FPGA unit is also two-way interconnected with 24 high precision analogue converting units and wireless communication unit respectively;
Field programmable logic device FPGA unit is connected with the two sensors signal end through 24 high precision analogue converting units of two-way, low-noise simulation signal condition unit in the described terminal acquisition node, makes the terminal acquisition node have the ability that 4 high precision transient electromagnetics of two-channel 2-4 data are gathered simultaneously.
5. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1, it is characterized in that: after the wireless communication unit of described terminal acquisition node receives the data acquisition instruction, according to instruction system operational parameters is set, gathers the transient electromagnetic signal; The transient electromagnetic signal is converted to digital quantity through low-noise simulation signal condition unit after 24 high precision analogue converting units, and data are temporary in the FPGA internal RAM; FPGA finishes the logic control of whole signal condition unit and 24 AD conversion unit; Wireless communication unit reads the data among the RAM and is packaged into one-node network image data bag, sends to router node or directly sends to telegon by wireless mode.
6. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1, it is characterized in that: described telegon is with the packet of the different terminals acquisition node that receives and/or receive after the packet that router node is transmitted is handled, integrated, be temporary among the static data storer SRAM, described data based user controls setting, transfers to industrial computer or is stored to USB storage by the demonstration of touch liquid crystal display unit or by USB.
7. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1, it is characterized in that: described telegon is by touch liquid crystal display unit configuration-system running parameter, or come the configuration-system running parameter by industrial computer operation monitoring software, the acquisition instructions that telegon sends comprises acquisition system active configuration parameter, the terminal acquisition node is gathered input transient electromagnetic signal according to configuration parameter work.
8. a kind of distributed Transient Electro-magnetic Data Acquisition System based on wireless sensor network according to claim 1, it is characterized in that: the USB storage of described telegon records data and the result of each terminal acquisition node, microcontroller reads historical data and result by the data storage control unit from USB storage, and shows at the touch liquid crystal display unit.
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